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Sample records for temporary balloon occlusion

  1. Transfemoral temporary aortic balloon occlusion in surgical treatment of second trimester intramural ectopic pregnancy.

    Science.gov (United States)

    Li, Shuhong; Liu, Honjie; Li, Xiaoyan; Liu, Zhifen; Li, Yan; Li, Ning

    2016-06-01

    Intramural ectopic pregnancy is a rare type of ectopic pregnancy that may lead to life-threatening hemorrhage. In the present case, a 20-year-old woman at 18.5 weeks of gestation, G1 P0 , was diagnosed with intramural ectopic pregnancy on ultrasound and magnetic resonance imaging, which showed a 14-cm × 14-cm gestational sac on the right posterior lateral side of the uterus fundus, surrounded completely by myometrium. Considering the increased risk of bleeding during surgery, transfemoral temporary aortic balloon occlusion was performed during laparotomy. The intramural ectopic gestational sac was successfully resected without life-threatening obstetric hemorrhage. This procedure could offer an alternative approach to classic uterine artery embolization in reducing intraoperative bleeding thus avoiding blood transfusion. Aortic balloon occlusion is the temporary occlusion of the aorta, therefore it does not influence future fertility. In conclusion, transfemoral temporary aortic balloon occlusion is an effective procedure in the surgical treatment of intramural ectopic pregnancy diagnosed beyond the first trimester. © 2016 Japan Society of Obstetrics and Gynecology.

  2. Temporary balloon occlusion of the internal iliac arteries to prevent massive hemorrhage during cesarean delivery among patients with placenta previa

    NARCIS (Netherlands)

    Broekman, Evelien A.; Versteeg, Henneke; Vos, Louwerens D.; Dijksterhuis, Marja G.; Papatsonis, Dimitri N.

    2015-01-01

    Objective To evaluate the effectiveness of temporary balloon occlusion of the internal iliac artery before uterine incision to prevent massive obstetric hemorrhage during cesarean delivery among patients with anterior placenta previa. Methods In a retrospective cohort study conducted at Amphia

  3. Temporary prophylactic intravascular balloon occlusion of the common iliac arteries before cesarean hysterectomy for controlling operative blood loss in abnormal placentation

    Directory of Open Access Journals (Sweden)

    Min Min Chou

    2015-10-01

    Conclusion: With limited experience in this small series, we observed a statistically significant reduction in operative blood loss after the use of temporary prophylactic balloon occlusion of the CIA technique compared with historical controls of similar demographic characteristics previously published (1902.3 ± 578.8 mL, range 500–8000 mL vs. 4445.7 ± 996.48 mL, range 1040–15,000 mL, p = 0.0402. Additionally, two patients had arterial thrombosis. These preliminary findings are based on a small number of patients, and therefore further investigation is needed to determine the effectiveness and safety of this new technique.

  4. Assessment of risk of carotid occlusion with balloon Matas testing and dynamic computed tomography

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    Terada, Tomoaki; Okuno, Takashi; Moriwaki, Hiroshi; Nakai, Ekini; Nishiguchi, Takashi; Hayashi, Seiji; Komai, Norihiko.

    1988-02-01

    Temporary occlusion of the internal carotid artery with a balloon catheter (balloon Matas test) and simultaneous dynamic computed tomographic scanning (DCT) were performed in four patients with intracranial aneurysms to determine their tolerance for permanent carotid occlusion. Five DCT parameters were evaluated: appearance time, peak time, peak height fitting, first effective moment, and transit time. The patients were characterized into three types: type I (2 patients) - lack of neurological deficit during the balloon Matas test and equally preserved cerebral blood flow (CBF) in the two hemispheres on DCT during carotid occlusion, type II (one patient) - a decreased CBF on the occluded side on DCT despite the lack of neurological deficit; type III (one patient) - neurological signs, such as disturbance of consciousness, aphasia, and right hemiparesis occuring immediately after the start of the balloon Matas test, and a decreased CBF in the region of the middle and anterior cerebral arteries on the occluded side. In the type III patient, occlusion of the internal carotid artery is contraindicated unless an EC-IC bypass procedure that can rapidly provide a large supply of blood is performed. It can be concluded that the balloon Matas/DCT method offers a reliable means of predicting the risk of carotid ligation. (Namekawa, K.).

  5. The Inflammatory Sequelae of Aortic Balloon Occlusion in Hemorrhagic Shock

    Science.gov (United States)

    2014-04-13

    balloon occlusion and shock on the release of interleukin 6 (IL 6) and tumor necrosis factor alpha. Materials and methods: Anesthetized female Yorkshire...14F sheath was placed in the external iliac artery via a retroperitoneal surgical exposure in the 30 and 90 REBOA groups, whereas this was accomplished...Ochmann J. Dynamics of interkeukin 1, 2 and 6 and tumor necrosis factor alpha in multiple trauma patients. J Trauma 1994;36:336. [26] Ayala A, Wang P, Ba Z

  6. Outcome of Pregnancies After Balloon Occlusion of the Infrarenal Abdominal Aorta During Caesarean in 230 Patients With Placenta Praevia Accreta

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    Wu, Qinghua, E-mail: qh-wu77@163.com [The First Affiliated Hospital of Zhengzhou University, Departments of Prenatal Diagnosis, and Obstetrics, Obstetric Critical Treatment Center of Henan Province (China); Liu, Zhuan, E-mail: liuchuan2015ck@163.com; Zhao, Xianlan, E-mail: zxl121292014@163.com; Liu, Cai, E-mail: liucai2015ck@163.com [The First Affiliated Hospital of Zhengzhou University, Obstetric Critical Treatment Center of Henan Province, Department of Obstetrics (China); Wang, Yanli, E-mail: wangyanli2015yfy@163.com; Chu, Qinjun, E-mail: chuqinjun2015@163.com [The First Affiliated Hospital of Zhengzhou University, Department of Anesthesiology (China); Wang, Xiaojuan, E-mail: wangxiaojun2015ck@163.com; Chen, Zhimin, E-mail: chenzhimin2015ck@163.com [The First Affiliated Hospital of Zhengzhou University, Obstetric Critical Treatment Center of Henan Province, Department of Obstetrics (China)

    2016-11-15

    PurposeTo explore the efficacy and safety of prophylactic temporary balloon occlusion of the infrarenal abdominal aorta during caesarean for the management of patients with placenta praevia accreta.MethodsTwo hundred and sixty-eight cases of placenta praevia accreta from January 2012 to June 2015 were retrospectively reviewed. Group A included two hundred and thirty patients who underwent prophylactic temporary balloon occlusion of infrarenal abdominal aorta followed by caesarean section. Group B included thirty-eight patients who underwent caesarean without endovascular intervention. The parameters including operating room time, estimated blood loss, blood transfusion volume, PT (prothrombin time) during operation, days in the intensive care unit, and total hospital days were compared between the two groups.ResultsThe operating room time, estimated blood loss, PT, the incidence of hysterectomy, blood transfusion volume, postpartum haemorrhage, and days in intensive care unit were lower in group A than in group B, with statistical significance (P < 0.05). There was no significant difference in the Apgar scores of the neonates and the incidences of thrombosis in lower limbs between the two groups (P > 0.05). No patient in the group with prophylactic temporary balloon occlusion of the infrarenal abdominal aorta was performed hysterectomy, while three patients in group B were performed hysterectomy because of uncontrollable haemorrhage.ConclusionsThe results indicate that prophylactic temporary balloon occlusion of infrarenal abdominal aorta followed by caesarean section is safe and effective to control intraoperative blood loss and greatly decreases the risk of hysterectomy in patients with placenta praevia accreta.

  7. Percutaneous treatment of extrahepatic bile duct stones assisted by balloon sphincteroplasty and occlusion balloon

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    Park, Yong Sung; Kim, Ji Hyung; Choi, Young Woo; Lee, Tae Hee; Hwang, Cheol Mog; Cho, Young Jun; Kim, Keum Won [Konyang University Hospital, Daejeon (Korea, Republic of)

    2005-12-15

    To describe the technical feasibility and usefulness of extrahepatic biliary stone removal by balloon sphincteroplasty and occlusion balloon pushing. Fifteen patients with extrahepatic bile duct stones were included in this study. Endoscopic stone removal was not successful in 13 patients, and two patients refused the procedure due to endoscopy phobia. At first, all patients underwent percutaneous transhepatic biliary drainage (PTBD). A few days later, through the PTBD route, balloon assisted dilatation for common bile duct (CBD) sphincter was performed, and then the stones were pushed into the duodenum using an 11.5 mm occlusion balloon. Success rate, reason for failure, and complications associated with the procedure were evaluated. Eight patients had one stone, five patients had two stones, and two patients had more than five stones. The procedure was successful in 13 patients (13/15). In 12 of the patients, all stones were removed in the first trial. In one patients, residual stones were discovered on follow-up cholangiography, and were subsequently removed in the second trial. Technical failure occurred in two patients. Both of these patients had severely dilated CBD and multiple stones with various sizes. Ten patients complained of pain in the right upper quadrant and epigastrium of the abdomen immediately following the procedure, but there were no significant procedure-related complications such as bleeding or pancreatitis. Percutaneous extrahepatic biliary stone removal by balloon sphincteroplasty and subsequent stone pushing with occlusion balloon is an effective, safe, and technically feasible procedure which can be used as an alternative method in patients when endoscopic extrahepatic biliary stone removal was not successful.

  8. Balloon-Assisted Microdissection "BAM" Technique for Balloon-Uncrossable Chronic Total Occlusions.

    Science.gov (United States)

    Vo, Minh N; Christopoulos, Georgios; Karmpaliotis, Dimitri; Lombardi, William L; Grantham, J Aaron; Brilakis, Emmanouil S

    2016-04-01

    After successful guidewire passage, failure to cross the occluded segment with a balloon is the most common cause of procedural failure in coronary chronic total occlusion (CTO) intervention. We evaluated the safety and efficacy of the balloon-assisted microdissection (BAM) technique for treating these complex balloon-uncrossable lesions. We identified consecutive cases treated with BAM for balloon-uncrossable CTOs between January 2012 and February 2015 at two experienced CTO percutaneous coronary intervention (PCI) centers and reviewed their clinical and angiographic characteristics and procedural outcomes. During the study period, a total of 17 patients had BAM performed for balloon-uncrossable CTOs. Mean age was 65.5 ± 8.7 years and 94% of patients were males who often had prior myocardial infarction, PCI, and coronary artery bypass graft surgery. The most common CTO target vessel was the right coronary artery. Mean J-CTO score was 2.6 ± 1.1. Despite high lesion complexity, overall procedural success was 94% and BAM facilitated success in approximately one-half of these cases. All BAM failure cases except 1 were successfully recanalized utilizing additional techniques. No patient experienced a major complication. BAM is a simple, inexpensive, and safe technique that can facilitate crossing of balloon-uncrossable CTOs and can be considered as first-line treatment for these complex lesions.

  9. Haemodynamic changes in hepatocellular carcinoma and liver parenchyma under balloon occlusion of the hepatic artery

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    Sugihara, Fumie; Murata, Satoru; Ueda, Tatsuo; Yasui, Daisuke; Yamaguchi, Hidenori; Miki, Izumi; Kumita, Shin-ichiro [Nippon Medical School, Department of Radiology, Center for Advanced Medical Technology, Tokyo (Japan); Kawamoto, Chiaki [Nippon Medical School, Department of Internal Medicine, Tokyo (Japan); Uchida, Eiji [Nippon Medical School, Department of Surgery, Tokyo (Japan)

    2017-06-15

    To investigate haemodynamic changes in hepatocellular carcinoma (HCC) and liver under hepatic artery occlusion. Thirty-eight HCC nodules in 25 patients were included. Computed tomography (CT) during hepatic arteriography (CTHA) with and without balloon occlusion of the hepatic artery was performed. CT attenuation and enhancement volume of HCC and liver with and without balloon occlusion were measured on CTHA. Influence of balloon position (segmental or subsegmental branch) was evaluated based on differences in HCC-to-liver attenuation ratio (H/L ratio) and enhancement volume of HCC and liver. In the segmental group (n = 20), H/L ratio and enhancement volume of HCC and liver were significantly lower with balloon occlusion than without balloon occlusion. However, in the subsegmental group (n = 18), H/L ratio was significantly higher and liver enhancement volume was significantly lower with balloon occlusion; HCC enhancement volume was similar with and without balloon occlusion. Rate of change in H/L ratio and enhancement volume of HCC and liver were lower in the segmental group than in the subsegmental group. There were significantly more perfusion defects in HCC in the segmental group. Hepatic artery occlusion causes haemodynamic changes in HCC and liver, especially with segmental occlusion. (orig.)

  10. Balloon occlusion of the internal iliac arteries in the multidisciplinary management of placenta percreta

    DEFF Research Database (Denmark)

    Clausen, Caroline; Stensballe, Jakob; Albrechtsen, Charlotte K

    2013-01-01

    Objective. To evaluate our experience with prophylactic balloon occlusion of the internal iliac arteries as a part of a multidisciplinary algorithm for the management of placenta percreta. Design. Consecutive case series. Setting. Rigshospitalet, Copenhagen University Hospital, Denmark. Sample....... Prophylactic balloon occlusion of the internal iliac arteries as part of a multidisciplinary algorithm allowed for a safe management of all cases in our consecutive series of 17 women with placenta percreta. However, intraoperative blood loss and transfusion requirements were significant. We have therefore...... decided to modify our multidisciplinary algorithm to include balloon occlusion of the common iliac arteries rather than the internal iliac arteries....

  11. Evaluation of Magnetic Resonance Imaging Safety and Imaging Issues Associated with the Occlusion Balloon Used during Fetoscopic Endoluminal Tracheal Occlusion.

    Science.gov (United States)

    Victoria, Teresa; Johnson, Ann M; Adzick, N Scott; Hedrick, Holly L; Shellock, Frank G

    2017-10-05

    Congenital diaphragmatic hernias can be successfully treated by fetoscopic tracheal occlusion (FETO), a minimally invasive procedure that may improve postnatal survival. The endoluminal balloon utilized for FETO contains a metallic component that may pose possible risks for the fetus and mother related to the use of magnetic resonance imaging (MRI). The objective of this study is to evaluate MRI-related imaging and safety issues (magnetic field interactions, heating, and artifacts) for the occlusion balloon used in FETO. Using well-established techniques, tests were performed to assess magnetic field interactions (translational attraction and torque) and MRI-related heating and artifacts that occurred when exposing the occlusion balloon typically used for FETO (Goldbal2, Balt, www.balt.fr) to a 3-T magnet. MRI-related heating was determined by placing the occlusion balloon in a gelled-saline-filled, head-torso phantom and conducting MRI at relatively high, whole-body-averaged specific absorption rate (2.9 W/kg) for 15 min. Artifacts were measured in association with the use of T1-weighted, spin-echo and gradient-echo pulse sequences. The balloon displayed minor magnetic field interactions and physiologically inconsequential heating (highest temperature rise: 0.1°C above background). Artifacts extended approximately 10 mm from the occlusion balloon on the gradient-echo pulse sequence, suggesting that anatomy located at a position greater than this distance may be visualized on MRI. In this paper, we demonstrate that the risks of performing MRI at 3 T or less in a patient who has this occlusion balloon in place are acceptable (or MR conditional, using current terminology). © 2017 S. Karger AG, Basel.

  12. Metabolic and hemodynamic effects of saline infusion to maintain volemia on temporary abdominal aortic occlusion

    Directory of Open Access Journals (Sweden)

    Fábio Ferreira Amorim

    2002-10-01

    Full Text Available OBJECTIVE: To analyze hemodynamic and metabolic effects of saline solution infusion in the maintenance of blood volume in ischemia-reperfusion syndrome during temporary abdominal aortic occlusion in dogs. METHODS: We studied 20 dogs divided into 2 groups: the ischemia-reperfusion group (IRG, n=10 and the ischemia-reperfusion group with saline solution infusion aiming at maintaining mean pulmonary arterial wedge pressure between 10 and 20 mmHg (IRG-SS, n=10. All animals were anesthetized with sodium thiopental and maintained on spontaneous ventilation. Occlusion of the supraceliac aorta was obtained with inflation of a Fogarty catheter inserted through the femoral artery. After 60 minutes of ischemia, the balloon was deflated, and the animals were observed for another 60 minutes of reperfusion. RESULTS: IRG-SS dogs did not have hemodynamic instability after aortic unclamping, and the mean systemic blood pressure and heart rate were maintained. However, acidosis worsened, which was documented by a greater reduction of arterial pH that occurred especially due to the absence of a respiratory response to metabolic acidosis that was greater with the adoption of this procedure. CONCLUSION: Saline solution infusion to maintain blood volume avoided hemodynamic instability after aortic unclamping. This procedure, however, caused worsening in metabolic acidosis in this experimental model.

  13. [Endovascular method of stopping gastric hemorrhages using temporary occlusion of the major vessels].

    Science.gov (United States)

    Losev, Iu A

    1978-04-01

    The author's method consists in temporary occlusion of the hepatic and splenic arteries; and contrast-medium or hemostatic sponge, introduced into the celiac trunk proximally to the site of the occlusion, propagate into the stomach artery. The method proved to be satisfactory in 8 patients.

  14. Percutaneous Treatment of Intrahepatic Biliary Leak: A Modified Occlusion Balloon Technique

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    Nasser, Felipe; Rocha, Rafael Dahmer, E-mail: rafaeldrocha@gmail.com; Falsarella, Priscila Mina; Motta-Leal-Filho, Joaquim Maurício da; Azevedo, André Arantes; Valle, Leonardo Guedes Moreira; Cavalcante, Rafael Noronha; Garcia, Rodrigo Gobbo; Affonso, Breno Boueri; Galastri, Francisco Leonardo [Hospital Israelita Albert Einstein, Department of Interventional Radiology (Brazil)

    2016-05-15

    PurposeTo report a novel modified occlusion balloon technique to treat biliary leaks.MethodsA 22-year-old female patient underwent liver transplantation with biliary-enteric anastomosis. She developed thrombosis of the common hepatic artery and extensive ischemia in the left hepatic lobe. Resection of segments II and III was performed and a biliary-cutaneous leak originating at the resection plane was identified in the early postoperative period. Initial treatment with percutaneous transhepatic drainage was unsuccessful. Therefore, an angioplasty balloon was coaxially inserted within the biliary drain and positioned close to the leak.ResultsThe fistula output abruptly decreased after the procedure and stopped on the 7th day. At the 3-week follow-up, cholangiography revealed complete resolution of the leakage.ConclusionThis novel modified occlusion balloon technique was effective and safe. However, greater experience and more cases are necessary to validate the technique.

  15. Successful treatment of acquired uterine arterial venous malformation using N-butyl-2-cyanoacrylate under balloon occlusion.

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    Woodhams, Reiko; Ogasawara, Go; Ishida, Kenichiro; Fujii, Kaoru; Yamane, Takuro; Nishimaki, Hiroshi; Matsunaga, Keiji; Inoue, Yusuke

    2014-09-01

    We present two cases of acquired uterine arterial venous malformation (AVM) which was diagnosed because of massive genital bleeding successfully treated with transcatheter arterial embolization (TAE), using N-butyl-2-cyanoacrylate (NBCA) under balloon occlusion. Balloon occlusion at the uterine artery was performed in both patients for diffuse distribution of NBCA in multiple feeding branches, as well as to the pseudoaneurysm, and for the prevention of NBCA reflux. In one of our patients, balloon occlusion of the draining vein was simultaneously performed to prevent NBCA migration through accompanying high-flow arteriovenous fistula (AVF). Doppler ultrasound at 6 months of both patients documented persistent complete occlusion of AVM. Complete and safe obliteration of acquired uterine AVM was accomplished using NBCA as embolic agent, under balloon occlusion at the communicating vessels of acquired uterine AVM.

  16. Cerebrospinal fluid enhancement on fluid attenuated inversion recovery images after carotid artery stenting with neuroprotective balloon occlusions: hemodynamic instability and blood-brain barrier disruption.

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    Ogami, Ryo; Nakahara, Toshinori; Hamasaki, Osamu; Araki, Hayato; Kurisu, Kaoru

    2011-10-01

    A rare complication of carotid artery stenting (CAS), prolonged reversible neurological symptoms with delayed cerebrospinal fluid (CSF) space enhancement on fluid attenuated inversion recovery (FLAIR) images, is associated with blood-brain barrier (BBB) disruption. We prospectively identified patients who showed CSF space enhancement on FLAIR images. Nineteen patients-5 acute-phase and 14 scheduled-underwent 21 CAS procedures. Balloon catheters were navigated across stenoses, angioplasty was performed using a neuroprotective balloon, and stents were placed with after dilation under distal balloon protection. CSF space hyperintensity or obscuration on FLAIR after versus before CAS indicated CSF space enhancement. Correlations with clinical factors were examined. CSF space was enhanced on FLAIR in 12 (57.1%) cases. Postprocedural CSF space enhancement was significantly related to age, stenosis rate, acute-stage procedure, and total occlusion time. All acute-stage CAS patients showed delayed enhancement. Only age was associated with delayed CSF space enhancement in scheduled CAS patients. Ischemic intolerance for severe carotid artery stenosis and temporary neuroprotective balloon occlusion, causing reperfusion injury, seem to be the main factors that underlie BBB disruption with delayed CSF space enhancement shortly after CAS, rather than sudden poststenting hemodynamic change. Our results suggest that factors related to hemodynamic instability or ischemic intolerance seem to be associated with post-CAS BBB vulnerability. Patients at risk for hemodynamic instability or with ischemic intolerance, which decrease BBB integrity, require careful management to prevent intracranial hemorrhagic and other post-CAS complications.

  17. Balloon removal after fetoscopic endoluminal tracheal occlusion for congenital diaphragmatic hernia.

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    Jiménez, Julio A; Eixarch, Elisenda; DeKoninck, Philip; Bennini, João R; Devlieger, Roland; Peralta, Cleisson F; Gratacos, Eduard; Deprest, Jan

    2017-07-01

    Isolated congenital diaphragmatic hernia defect allows viscera to herniate into the chest, competing for space with the developing lungs. At birth, pulmonary hypoplasia leads to respiratory insufficiency and persistent pulmonary hypertension that is lethal in up to 30% of patients. Antenatal measurement of lung size and liver herniation can predict survival after birth. Prenatal intervention aims at stimulating lung development, clinically achieved by percutaneous fetal endoscopic tracheal occlusion under local anesthesia. This in utero treatment requires a second intervention to reestablish the airway, either before birth or at delivery. To describe our experience with in utero endotracheal balloon removal. This is a retrospective analysis of prospectively collected data on consecutive patients with congenital diaphragmatic hernia treated in utero by fetal endoscopic tracheal occlusion from 3 centers. Maternal and pregnancy-associated variables were retrieved. Balloon removal attempts were categorized as elective or emergency and by technique (in utero: ultrasound-guided puncture; fetoscopy; ex utero: on placental circulation or postnatal tracheoscopy). We performed 351 balloon insertions during a 144-month period. In 9 cases removal was attempted outside fetal endoscopic tracheal occlusion centers, 3 of which were deemed impossible and led to neonatal death. We attempted 302 in-house balloon removals in 292 fetuses (217 elective [71.8%], 85 emergency [28.2%]) at 33.4 ± 0.1 weeks (range: 28.9-37.1), with a mean interval to delivery of 16.6 ± 0.8 days (0-85). Primary attempt was by fetoscopy in 196 (67.1%), by ultrasound-guided puncture in 62 (21.2%), by tracheoscopy on placental circulation in 30 (10.3%), and postnatal tracheoscopy in 4 cases (1.4%); a second attempt was required in 10 (3.4%) cases. Each center had different preferences for primary technique selection. In elective removals, we found no differences in the interval to delivery between fetoscopic

  18. Prophylactic balloon occlusion of internal iliac arteries in women with placenta accreta: Literature review and analysis

    Energy Technology Data Exchange (ETDEWEB)

    Dilauro, M.D.; Dason, S. [McMaster University, Michael G. DeGroote School of Medicine (Canada); Athreya, S., E-mail: sathreya@stjoes.ca [Diagnostic Imaging, St Joseph' s Healthcare Hamilton, Ontario (Canada)

    2012-06-15

    Aim: To review the literature on the use of prophylactic balloon occlusion alone and in conjunction with arterial embolization of the internal iliac arteries in women with placenta accreta. Materials and methods: The PubMed, MEDLINE, CINAHL, EMBASE, and Cochrane Library databases were searched for keywords related to this technique and its use in the avoidance of caesarean hysterectomy. The relevant published articles were selected and then searched for further references. Results: The literature search found 15 case reports and five studies for a total of 20 articles. The use of balloon catheters to prevent post-partum haemorrhage in women with placenta accreta is controversial with some investigators reporting reduced blood loss and transfusion requirements while others reporting no benefit. This procedure does not appear to reduce operative time or hospital stay. Some groups have described catheter-related complications, such as maternal thromboembolic events and the need for stent placement and/or arterial bypass. Thus far, there is no reported maternal or foetal mortality related to this procedure. Conclusion: Current evidence is based upon case reports and small retrospective studies. Larger studies or randomized controlled trials are essential in order to demonstrate the safety and efficacy of bilateral iliac balloon occlusion. The creation of a data registry would also facilitate the reporting of this technique.

  19. Implementation of resuscitative endovascular balloon occlusion of the aorta as an alternative to resuscitative thoracotomy for noncompressible truncal hemorrhage.

    Science.gov (United States)

    Moore, Laura J; Brenner, Megan; Kozar, Rosemary A; Pasley, Jason; Wade, Charles E; Baraniuk, Mary S; Scalea, Thomas; Holcomb, John B

    2015-10-01

    Hemorrhage remains the leading cause of death in trauma patients. Proximal aortic occlusion, usually performed by direct aortic cross-clamping via thoracotomy, can provide temporary hemodynamic stability, permitting definitive injury repair. Resuscitative endovascular balloon occlusion of the aorta (REBOA) uses a minimally invasive, transfemoral balloon catheter, which is rapidly inserted retrograde and inflated for aortic occlusion, and may control inflow and allow time for hemostasis. We compared resuscitative thoracotomy with aortic cross-clamping (RT) with REBOA in trauma patients in profound hemorrhagic shock. Trauma registry data was used to compare all patients undergoing RT or REBOA during an 18-month period from two Level 1 trauma centers. There was no difference between RT (n = 72) and REBOA groups (n = 24) in terms of demographics, mechanism of injury, or Injury Severity Scores (ISSs). There was no difference in chest and abdominal Abbreviated Injury Scale (AIS) scores between the groups. However, the RT patients had lower extremity AIS score as compared with REBOA patients (1.5 [0-3] vs. 4 [3-4], p < 0.001). Of the 72 RT patients, 45 (62.5%) died in the emergency department, 6 (8.3%) died in the operating room, and 14 (19.4%) died in the intensive care unit. Of the 24 REBOA patients, 4 (16.6%) died in the emergency department, 3 (12.5%) died in the operating room, and 8 (33.3%) died in the intensive care unit. In comparing location of death between the RT and REBOA groups, there were a significantly higher number of deaths in the emergency department among the RT patients as compared with the REBOA patients (62.5% vs. 16.7%, p < 0.001). REBOA had fewer early deaths and improved overall survival as compared with RT (37.5% vs. 9.7%, p = 0.003). REBOA is feasible and controls noncompressible truncal hemorrhage in trauma patients in profound shock. Patients undergoing REBOA have improved overall survival and fewer early deaths as compared with patients

  20. Bioabsorbable radiopaque water-responsive shape memory embolization plug for temporary vascular occlusion.

    Science.gov (United States)

    Wong, Yee Shan; Salvekar, Abhijit Vijay; Zhuang, Kun Da; Liu, Hui; Birch, William R; Tay, Kiang Hiong; Huang, Wei Min; Venkatraman, Subbu S

    2016-09-01

    We describe the preparation, characterization and evaluation of a biodegradable radiopaque water-triggered shape memory embolization plug for temporary vascular occlusion. The shape memory occluding device consists of a composite of a radio-opaque filler and a poly (dl-lactide-co-glycolide) (PLGA) blend, which was coated with a crosslinked poly (ethylene glycol) diacrylate (PEGDA) hydrogel. The mechanical properties, the degradation timeframe, the effect of programming conditions on the shape memory behaviour and the extent of radio-opacity for imaging were evaluated. Based on the tests, the mechanism responsible for the water-induced shape memory effect in such an embolization plug was elucidated. Suitable materials were optimized to fabricate an embolic plug prototype and its in vitro performance was evaluated as an occlusion rate (using a custom-built set up) and its biocompatibility. Finally, a feasibility study was conducted in vivo in a rabbit model to investigate the ease of device deployment, device migration and extent of vessel occlusion. The in vivo results demonstrated that the prototypes were visible under fluoroscopy and complete vascular occlusion occurred within 2 min of deployment of the prototypes in vivo. In conclusion, the developed embolization plug enables controlled and temporary vascular embolization, and is ready for safety studies. Copyright © 2016 Elsevier Ltd. All rights reserved.

  1. The use of CT-angiography for monitoring thrombus formation after balloon occlusion of a dissecting vertebral artery pseudoaneurysm

    NARCIS (Netherlands)

    Verstegen, Marco J. T.; Hulsmans, Frans-Jan H.; Majoie, Charles B. L. M.; Bouma, Gerrit J.

    2002-01-01

    We present a 49-year-old man with a subarachnoid haemorrhage from a dissecting vertebral artery (VA) pseudoaneurysm treated with a proximal balloon occlusion. The clinical course was complicated by the sudden appearance of a lateral medullary syndrome (Wallenberg), which completely resolved after

  2. Transurethral distal ureter balloon occlusion and detachment: a simple means of managing the distal ureter during radical nephroureterectomy

    NARCIS (Netherlands)

    Cormio, Luigi; Selvaggio, Oscar; Di Fino, Giuseppe; Massenio, Paolo; Annese, Pasquale; de la Rosette, Jean; Carrieri, Giuseppe

    2013-01-01

    Distal ureter bladder cuff (DUBC) excision is an essential part of radical nephroureterectomy (RNU), but the technique to accomplish it remains controversial. We describe a novel technique of transurethral distal ureter balloon occlusion before detachment (TUDUBOD) whereby the affected ureter is

  3. [Iliac artery occlusion balloons for suspected placenta accreta during cesarean section].

    Science.gov (United States)

    Burgos Frías, N; Gredilla, E; Guasch, E; Gilsanz, F

    2014-02-01

    Massive obstetric hemorrhage still remains a major cause of maternal mortality and morbidity. The risk factors associated with this pathology must be identified in order to schedule the appropriate delivery with the necessary resources. A case is presented of an iliac artery occlusion with intravascular balloons for suspected placenta accreta during cesarean section. The perioperative treatment, as well as an analysis of the treatment options is described, along with their advantages and disadvantages, from the use of postpartum hemorrhage protocols, blood transfusion and procoagulant factors, and other maneuvers to control bleeding, until the hysterectomy. Copyright © 2012 Sociedad Española de Anestesiología, Reanimación y Terapéutica del Dolor. Published by Elsevier España. All rights reserved.

  4. Successful Reversal of Chronic Incapacitating Post-TIPS Encephalopathy by Balloon Occlusion of the Stent

    Directory of Open Access Journals (Sweden)

    Daphna Fenyves

    1994-01-01

    Full Text Available Transjugular intrahepatic portosystemic shunt (TIPS placement is a new technique allowing decompression of the portal system without the need for abdominal surgery or general anesthetic. This promising procedure appears safe, and is being evaluated in the context of life threatening uncontrollable variceal hemorrhage as well as ascites refractory to medical treatment. Following TIPS, portal flow diversion is associated with hepatic encephalopathy in up to 25% of patients. This is most often mild and treatable but may become uncontrollable, incapacitating and even life threatening in up to 3 to 5% of cases. The authors present two patients in whom such life threatening encephalopathy and stupor was reversed by transjugular balloon occlusion of the TIPS.

  5. Circle of Willis Collateral During Temporary Internal Carotid Artery Occlusion II: Observations From Computed Tomography Angiography.

    Science.gov (United States)

    Wang, Bill Hao; Leung, Andrew; Lownie, Stephen P

    2016-07-01

    The Circle of Willis (CoW) is the most effective collateral circulation to the brain during internal carotid artery (ICA) occlusion. Carotid stump pressure (CSP) is an established surrogate measure of the cerebral collateral circulation. This study aims to use hemodynamic and computed tomography angiography measurements to determine the strongest influences upon the dependent variable, CSP. These findings could help clinicians noninvasively assess the adequacy of the collateral circulation and facilitate surgical risk assessment in an outpatient setting. CSP and mean arterial pressure were measured during carotid endarterectomy or during carotid balloon test occlusion in 92 patients. Intracranial arterial diameters were measured on computed tomography angiography at 16 different locations. Univariate and multivariate analyses were used to determine the key factors associated with CSP. In a subgroup of individuals (n=27) with severe (>70% North American Symptomatic Carotid Endarterectomy Trial) contralateral stenosis or occlusion, the same analysis was performed. The contralateral anterior cerebral artery proximal to anterior communicating artery (A1) of the CoW had the strongest influence upon CSP, followed by the mean arterial pressure, the contralateral ICA diameter, and the anterior communicating artery diameter (R 2=0.364). In the subgroup with high-grade contralateral ICA stenosis, the ipsilateral posterior communicating artery exerted the strongest influence (R 2=0.620). During ICA occlusion, the anterior CoW dominates in preserving collateral flow, especially the contralateral A1 segment. In individuals with high-grade contralateral carotid stenosis, the posterior communicating artery calibre becomes a dominant influence. The most favourable anatomy consists of large contralateral A1 and anterior communicating arteries, and no contralateral carotid stenosis.

  6. Hepatic outflow obstruction created by balloon occlusion of the hepatic vein: induced hepatic hemodynamic changes and the therapeutic applications of hepatic venous occlusion with a balloon catheter in interventional radiology.

    OpenAIRE

    Hiraki, Takao; Kanazawa, Susumu

    2005-01-01

    Hepatic outflow obstruction created by balloon occlusion of the hepatic vein induces characteristic angiographic findings in the occluded area: prolonged enhancement on hepatogram followed by reversed portal opacification on the hepatic arteriogram and perfusion defect on the arterial portogram. The following induced hepatic hemodynamic changes are suggested: hepatic arterial flow increases, and the portal vein acts as a draining vein with slow reversed flow. These unique hemodynamic...

  7. Conservative Management of Invasive Placenta Using Combined Prophylactic Internal Iliac Artery Balloon Occlusion and Immediate Postoperative Uterine Artery Embolization.

    Science.gov (United States)

    D'Souza, Donna L; Kingdom, John C; Amsalem, Hagai; Beecroft, John R; Windrim, Rory C; Kachura, John R

    2015-05-01

    The objective of the study was to evaluate the efficacy and safety of combined prophylactic intraoperative internal iliac artery balloon occlusion and postoperative uterine artery embolization in the conservative management (uterine preservation) of women with invasive placenta undergoing scheduled caesarean delivery. Ten women (mean age 35 years) with invasive placenta choosing caesarean delivery without hysterectomy had preoperative insertion of internal iliac artery occlusion balloons, intraoperative inflation of the balloons, and immediate postoperative uterine artery embolization with absorbable gelatin sponge. A retrospective review was performed with institutional review board approval. Outcome measures were intraoperative blood loss, transfusion requirement, hysterectomy rate, endovascular complications, surgical complications, and postoperative morbidity. All women had placenta increta or percreta, and concomitant complete placenta previa. Mean gestational age at delivery was 36 weeks. In 6 women the placenta was left undisturbed in the uterus, 2 had partial removal of the placenta, and 2 had piecemeal removal of the whole placenta. Mean estimated blood loss during caesarean delivery was 1.2 L. Only 2 patients (20%) required blood transfusion. There were no intraoperative surgical complications, endovascular complications, maternal deaths, or perinatal deaths. Three women developed postpartum complications necessitating postpartum hysterectomy; the hysterectomy rate was therefore 30% and uterine preservation was successful in 70%. Combined bilateral internal iliac artery balloon occlusion and uterine artery embolization may be an effective strategy to control intraoperative blood loss and preserve the uterus in patients with invasive placenta undergoing caesarean delivery. Copyright © 2015 Canadian Association of Radiologists. Published by Elsevier Inc. All rights reserved.

  8. The Effect of Infrarenal Aortic Balloon Occlusion on Weaning from Supraceliac Aortic Balloon Occlusion in a Porcine Model (Sus scrofa) of Hemorrhagic Shock

    Science.gov (United States)

    2017-06-15

    all animals , and continued for six hours. Half of the animals were randomly assigned to Zone-3 REBOA for an additional 45 minutes following Zone-1...concentration or resuscitation requirements.Conclusion: In an animal model of hemorrhagic shock and Zone-1 REBOA, subsequent Zone-3 aortic occlusion did not add

  9. Low-pressure balloon angioplasty with adjuvant pharmacological therapy in patients with acute ischemic stroke caused by intracranial arterial occlusions

    Energy Technology Data Exchange (ETDEWEB)

    Nogueira, Raul G. [Massachusetts General Hospital, Harvard Medical School, Department of Radiology, Endovascular Neurosurgery/Interventional Neuroradiology Section, Boston, MA (United States); Massachusetts General Hospital, Harvard Medical School, Department of Neurosurgery, Endovascular Neurosurgery/Interventional Neuroradiology Section, Boston, MA (United States); Massachusetts General Hospital, Harvard Medical School, Department of Neurology, Neurocritical Care and Vascular Neurology Section, Boston, MA (United States); Massachusetts General Hospital, Boston, MA (United States); Schwamm, Lee H.; Buonanno, Ferdinando S.; Koroshetz, Walter J. [Massachusetts General Hospital, Harvard Medical School, Department of Neurology, Neurocritical Care and Vascular Neurology Section, Boston, MA (United States); Yoo, Albert J.; Rabinov, James D.; Pryor, Johnny C.; Hirsch, Joshua A. [Massachusetts General Hospital, Harvard Medical School, Department of Radiology, Endovascular Neurosurgery/Interventional Neuroradiology Section, Boston, MA (United States); Massachusetts General Hospital, Harvard Medical School, Department of Neurosurgery, Endovascular Neurosurgery/Interventional Neuroradiology Section, Boston, MA (United States)

    2008-04-15

    The use of coronary balloons in the cerebral vasculature is limited due to their poor trackability and increased risk of vessel injury. We report our experience using more compliant elastomer balloons for thrombus resistant to intraarterial (IA) pharmacological and mechanical thrombolysis in acute stroke. We retrospectively analyzed 12 consecutive patients with an occluded intracranial artery treated with angioplasty using a low-pressure elastomer balloon. Angiograms were graded according to the Thrombolysis in Cerebral Infarction (TICI) and Qureshi grading systems. Outcomes were categorized as independent (modified Rankin scale, mRS, score {<=}2), dependent (mRS score 3-5), or dead (mRS score 6). Included in the study were 12 patients (mean age 66{+-}17 years, range 31-88 years; mean baseline National Institutes of Health stroke scale score 17{+-}3, range 12-23). The occlusion sites were: internal carotid artery (ICA) terminus (five patients, including two concomitant cervical ICA occlusions), M1 segment (two patients), and basilar artery (two patients). Pharmacological treatment included intravenous (IV) t-PA only (two patients), IA urokinase only (nine patients), both IV t-PA and IA urokinase (one patient), and IV and/or IA eptifibatide (eight patients). Mean time to treatment was 5.9{+-}3.9 h (anterior circulation) and 11.0{+-}7.2 h (posterior circulation). Overall recanalization rate (TICI grade 2/3) was 91.6%. Procedure-related morbidity occurred in one patient (distal posterior inferior cerebellar artery embolus). There were no symptomatic hemorrhages. Outcomes at 90 days were independent (five patients), dependent (three patients) and dead (four patients, all due to progression of stroke with withdrawal of care). Angioplasty of acutely occluded intracranial arteries with low-pressure elastomer balloons results in high recanalization rates with an acceptable degree of safety. Prior use of thrombolytics may increase the chances of recanalization, and

  10. Balloon occlusion retrograde transvenous obliteration of gastric varices in two-cirrhotic patients with portal vein thrombosis

    Energy Technology Data Exchange (ETDEWEB)

    Borhei, Peyman; Kim, Seung Kwon; Zukerman, Darryl A [Interventional Radiology, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis (United States)

    2014-02-15

    This report describes two non-cirrhotic patients with portal vein thrombosis who underwent successful balloon occlusion retrograde transvenous obliteration (BRTO) of gastric varices with a satisfactory response and no complications. One patient was a 35-year-old female with a history of Crohn's disease, status post-total abdominal colectomy, and portal vein and mesenteric vein thrombosis. The other patient was a 51-year-old female with necrotizing pancreatitis, portal vein thrombosis, and gastric varices. The BRTO procedure was a useful treatment for gastric varices in non-cirrhotic patients with portal vein thrombosis in the presence of a gastrorenal shunt.

  11. Temporary Simultaneous Two-Arterial Occlusions (Testo) during Laparoscopic Management for Cornual Ectopic Pregnancy.

    Science.gov (United States)

    Yang, Haeree; Song, Taejong

    2018-01-22

    To demonstrate a new technique of TEmporary Simultaneous Two-arterial Occlusions (TESTO) of uterine and ovarian (or utero-ovarian) artery to reduce operative blood loss during laparoscopic cornual resection for cornual ectopic pregnancy. A step-by-step explanation of the surgical procedure using video (Canadian Task Force classification III). This study was approved by the Institutional Review Board. A university hospital PATIENTS: A 41-year-old woman presented with pelvic pain with 7 weeks of amenorrhea. Transvaginal sonogram and laboratory test revealed left cornual pregnancy. She had a history of left salpingectomy due to tubal pregnancy and wanted prompt surgical management without surgical scar. At the single-port laparoscopy, we found a 3-cm unruptured ectopic mass in the left uterine cornua. In the first step, the retroperitoneum was opened by Harmonic Scalpel (Ethicon Endosurgery, Cincinnati, OH, USA) along infundibulopelvic ligament. Then, both uterine arteries were temporarily occluded with bulldog clamp (Aesculap, Tuttlingen, Germany) at the level where it originates from the internal iliac artery. The bulldog clamp, which is a spring-loaded crossover clamp with serrated blades effectively occlude vessels without slippage or significant crush injury, is the laparoscopic instrument for minimizing blood loss during surgical procedure. Each ovarian arterial vasculature was also transiently occluded at the utero-ovarian or ovarian pedicle with placing bulldog clamp. Uterine incision then was made in the left cornua using Harmonic Scalpel, and the gestational conception was expressed through the incision and corneal resection was completed. The uterine defect was closed using V-Loc suture (Covidien, Mansfield, MA, USA). In the final step, all vascular clamps were removed for reperfusion. Operative time was 45 minutes. The procedure time for TESTO and the occlusion time (defined as the time that bilateral uterine and ovarian vessels were occluded by bulldog

  12. Clinicopathological correlation of parapapillary atrophy in monkeys with experimental glaucoma and temporary central retinal artery occlusion

    Directory of Open Access Journals (Sweden)

    Jost B Jonas

    2014-01-01

    Full Text Available Objective: To investigate the clinicopathological correlation of parapapillary atrophy. Materials and Methods: The study included 16 eyes of rhesus monkeys (Macaca mulatta - 4 eyes with experimental glaucoma, 11 eyes after experimental temporary occlusion of the central retinal artery, and 1 normal eye. On histological sections, we measured zones with different histological characteristics.On fundus photographs, alpha zone and beta zone of parapapillary atrophy were measured and correlated with the histological data. Results: The size of the clinical alpha zone of parapapillary atrophy was significantly correlated with the size of the histological region with irregularities of the retinal pigment epithelium (P = 0.05; correlation coefficient r = 0.49 and with the size of the histological region with a decreased density of retinal photoreceptors (P = 0.01; r = 0.60. The size of clinical beta zone of parapapillary atrophy significantly correlated with the size of the histological region with complete loss of the retinal pigment epithelium (P <0.001; r = 0.91, with the size of the histological zone with a complete loss of photoreceptors (P <0.001; r = 0.81, and with the size of the histological zone with a closed choriocapillaris (P <0.001; r = 0.89. Conclusions: The clinically seen alpha zone of parapapillary atrophy correlates with histological parapapillary irregularities of the retinal pigment epithelium and decreased density of retinal photoreceptors. The clinically seen beta zone of parapapillary atrophy correlates with histological complete loss of the retinal pigment epithelium and of the photoreceptors, and a closure of the choriocapillaris.

  13. Combined percutaneous balloon mitral valvuloplasty and left atrial appendage occlusion device implantation for rheumatic mitral stenosis and atrial fibrillation

    Energy Technology Data Exchange (ETDEWEB)

    Murdoch, Dale, E-mail: dale_murdoch@health.qld.gov.au [The Prince Charles Hospital, Brisbane (Australia); The University of Queensland, Brisbane (Australia); McAulay, Laura [The Prince Charles Hospital, Brisbane (Australia); Walters, Darren L. [The Prince Charles Hospital, Brisbane (Australia); The University of Queensland, Brisbane (Australia)

    2014-11-15

    Rheumatic heart disease is a common cause of cardiovascular morbidity and mortality worldwide, mostly in developing countries. Mitral stenosis and atrial fibrillation often coexist, related to both structural and inflammatory changes of the mitral valve and left atrium. Both predispose to left atrial thrombus formation, commonly involving the left atrial appendage. Thromboembolism can occur, with devastating consequences. We report the case of a 62 year old woman with rheumatic heart disease resulting in mitral stenosis and atrial fibrillation. Previous treatment with warfarin resulted in life-threatening gastrointestinal bleeding and she refused further anticoagulant therapy. A combined procedure was performed, including percutaneous balloon mitral valvuloplasty and left atrial appendage occlusion device implantation with the Atritech® Watchman® device. No thromboembolic or bleeding complications were encountered at one year follow-up. Long-term follow-up in a cohort of patients will be required to evaluate the safety and efficacy of this strategy.

  14. Aorta Balloon Occlusion in Trauma: Three Cases Demonstrating Multidisciplinary Approach Already on Patient’s Arrival to the Emergency Room

    Energy Technology Data Exchange (ETDEWEB)

    Hörer, Tal M., E-mail: tal.horer@orebroll.se [Örebro University, Department of Cardiothoracic and Vascular Surgery, Örebro University Hospital (Sweden); Hebron, Dan [Hillel Yaffe Medical Center, Department of Radiology (Israel); Swaid, Forat [Bnai-Zion Medical Center, Department of General Surgery (Israel); Korin, Alexander [Hillel Yaffe Medical Center, Trauma Unit (Israel); Galili, Offer [Hillel Yaffe Medical Center, Department of Vascular Surgery (Israel); Alfici, Ricardo [Hillel Yaffe Medical Center, Surgical Division (Israel); Kessel, Boris [Hillel Yaffe Medical Center, Trauma Unit (Israel)

    2016-02-15

    PurposeTo describe the usage of aortic balloon occlusion (ABO), based on a multidisciplinary approach in severe trauma patients, emphasizing the role of the interventional radiologist in primary trauma care.MethodsWe briefly discuss the relevant literature, the technical aspects of ABO in trauma, and a multidisciplinary approach to the bleeding trauma patient. We describe three severely injured trauma patients for whom ABO was part of initial trauma management.ResultsThree severely injured multi-trauma patients were treated by ABO as a bridge to surgery and embolization. The procedures were performed by an interventional radiologist in the early stages of trauma management.ConclusionsThe interventional radiologist and the multidisciplinary team approach can be activated already on severe trauma patient arrival. ABO usage and other endovascular methods are becoming more widely spread, and can be used early in trauma management, without delay, thus justifying the early activation of this multidisciplinary approach.

  15. First-in-Human Experience With the Gore Balloon-Expandable Covered Endoprosthesis in Iliac Artery Occlusive Disease.

    Science.gov (United States)

    Holden, Andrew; Merrilees, Stephen; Buckley, Brendan; Connor, Brigid; Colgan, Frances; Hill, Andrew

    2017-02-01

    To report the first-in-human iliac artery experience of a new balloon-expandable covered endoprosthesis. A prospective, single-center pilot study recruited 30 symptomatic patients (mean age 64 years; 18 men) to evaluate the safety and early efficacy of the new Gore balloon-expandable covered endoprosthesis for the treatment of de novo or restenotic common and/or external iliac artery lesions. According to protocol, up to 2 discrete lesions could be treated with a maximum total treated length ≤110 mm. Follow-up included clinical evaluation with duplex ultrasound at 1, 6, and 12 months. Data are presented through 12-month follow-up. The primary safety endpoint was a composite of device- or procedure-related death, myocardial infarction, or amputation in the treated leg within 30 days of the index procedure. Multiple performance outcomes were also evaluated. The primary 30-day safety endpoint was 0%. Per-subject estimates of primary patency, freedom from target lesion revascularization, and freedom from target vessel revascularization were 100% at 1 and 6 months and 96.6% at 12 months. Estimates of assisted primary and secondary patency were both 100% at 12 months. Freedom from major adverse events at 12 months was 100%. Most patients experienced improvements in Rutherford category, ankle-brachial index, and functional status that were sustained to 12 months. This positive first-in-human experience with the Gore balloon-expandable covered endoprosthesis suggests this device will have an important role in the management of aortoiliac occlusive disease.

  16. Impact of routine crossover balloon occlusion technique on access-related vascular complications following transfemoral transcatheter aortic valve replacement.

    Science.gov (United States)

    Zaman, Sarah; Gooley, Robert; Cheng, Victoria; McCormick, Liam; Meredith, Ian T

    2016-08-01

    To determine the impact of incorporating routine crossover balloon occlusion technique (CBOT) for vascular access closure following transcatheter aortic valve replacement (TAVR) on major access-site-related complications. Vascular complications are associated with increased mortality following TAVR. The CBOT involves passage of a balloon catheter from the contralateral femoral artery to enable controlled closure of large-sheath access-sites. Consecutive patients who underwent transfemoral TAVR as part of three clinical trials were prospectively recruited. Patients who had routine CBOT (CBOT group, n = 55) were compared to preceding patients who did not undergo CBOT (control group, n = 43). The primary endpoint was 30-day occurrence of access-site-related Valve Academic Research Consortium (VARC)-2 defined major vascular and/or bleeding complications. CBOT was successfully performed in 96% with 2% occurrence of a minor CBOT-related complication. At 30-days access-site-related major vascular and/or bleeding occurred in 5.5% and 18.6% of the CBOT and control group, respectively (P = 0.042). This consisted of VARC-2 major vascular events in 3.6% and 16.3% (P = 0.036) and VARC-2 major/life-threatening bleeding events in 5.5% and 14.0% (P = 0.137) of the CBOT and control group, respectively. Transfusion of ≥2 units of packed red blood cells were required in 10.9% and 30.2% of the CBOT and control group, respectively (P = 0.016). There was no significant difference in contrast load, procedure time, and kidney injury between the two groups. Routine CBOT for TAVR access-site closure has a high success rate and is associated with a significant reduction in VARC-2 major vascular and bleeding complications compared to TAVR performed without CBOT. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  17. Endovascular recanalization of acute intracranial vertebrobasilar artery occlusion using local fibrinolysis and additional balloon angioplasty

    Energy Technology Data Exchange (ETDEWEB)

    Kashiwagi, Junji; Okahara, Mika [Shinbeppu Hospital, Department of Radiology, Beppu, Oita (Japan); Kiyosue, Hiro; Tanoue, Shuichi; Sagara, Yoshiko; Mori, Hiromu [Oita University Faculty of Medicine, Department of Radiology, Yufu, Oita (Japan); Hori, Yuzo [Nagatomi Neurosurgical Hospital, Department of Radiology, Oita, Oita (Japan); Abe, Toshi [Kurume University School of Medicine, Department of Radiology, Kurume, Fukuoka (Japan)

    2010-05-15

    Vertebrobasilar artery occlusion (VBO) produces high mortality and morbidity due to low recanalization rate utilization in endovascular therapy. The use of percutaneous transluminal angioplasty (PTA) to improve recanalization rate additional to local intra-arterial fibrinolysis (LIF) was investigated in this study. Results obtained following recanalization therapy in acute intracranial VBO are reported. Eighteen consecutive patients with acute VBO underwent LIF with or without PTA, from August 2000 to May 2006. Eight patients were treated using LIF alone, and ten required additional PTA. Rate of recanalization, neurological status before treatment, and clinical outcomes were evaluated. Of 18 patients, 17 achieved recanalization. One procedure-related complication of subarachnoid hemorrhage occurred. Overall survival rate was 94.4% at discharge. Seven patients achieved good outcomes [modified Rankin scale (mRS) 0-2], and the other 11 had poor outcomes (mRS 3-6). Five of six patients who scored 9-14 on the Glasgow Coma Scale (GCS) before treatment displayed good outcomes, whereas ten of 12 patients who scored 3-8 on the GCS showed poor outcomes. GCS prior to treatment showed a statistically significant correlation to outcomes (p < 0.05). Moreover, the National Institutes of Health Stroke Scale (NIHSS) before treatment correlated well with mRS (correlation coefficient 0.487). No statistical difference between the good and poor outcome groups was observed for the duration of symptoms, age, etiology, and occlusion site. Endovascular recanalization can reduce mortality and morbidity of acute VBO. Good GCS and NIHSS scores prior to treatment can predict the efficacy of endovascular recanalization. (orig.)

  18. Evaluation of the fetal dose during prophylactic placement of internal iliac artery balloon occlusion catheters in placenta accreta

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Dong Sik [Dept. of Radiology, Gachon University Gil hospital, Incheon (Korea, Republic of); Ahn, Sung Min [Dept. of Radiological Science, Gachon University, Incheon (Korea, Republic of)

    2016-09-15

    Placenta accrete patients whose mother mortality rates are rather high due to massive bleeding during childbirth need to have Prophylactic placement of Internal Iliac Artery Balloon Occlusion Catheters procedure to reduce amount of blood loss and inoperative transfusion. Nevertheless, studies for mothers inevitably exposed to dose during PIIABOCs procedure have not been published many yet. Therefore, this study is to investigate exact information on radiation dose exposed to fetus during PIIABOCs procedure. Average effective dose of fetus per organ is 2.38∼8.83 mGy, measured highest at beam center and followed by eyeball, stomach and bladder. The result showed that the longer fluoroscopy time is used, the closer beam center is and the thicker abdominal thickness is, the more effective dose on fetus is increasing. When using the collimator and protection shown to decrease the effective dose and when using higher the patient table shown to decrease the effective dose. It has been reported that the threshold of deterministic effect is about 100mGy. Deterministic effect was regarded as a factor that would influence on fetus exposed by medical radiation than stochastic effect. Consequently, it concluded that dose exposed on fetus in PIIABOCs procedure was approximately 10% of threshold of deterministic effect with effective dose of 0.49∼18.27 mGy.

  19. Resuscitative endovascular balloon occlusion of the aorta (REBOA): a population based gap analysis of trauma patients in England and Wales.

    Science.gov (United States)

    Barnard, Edward Benjamin Graham; Morrison, Jonathan James; Madureira, Ricardo Mondoni; Lendrum, Robbie; Fragoso-Iñiguez, Marisol; Edwards, Antoinette; Lecky, Fiona; Bouamra, Omar; Lawrence, Thomas; Jansen, Jan Olaf

    2015-12-01

    Non-compressible torso haemorrhage (NCTH) carries a high mortality in trauma as many patients exsanguinate prior to definitive haemorrhage control. Resuscitative endovascular balloon occlusion of the aorta (REBOA) is an adjunct that has the potential to bridge patients to definitive haemostasis. However, the proportion of trauma patients in whom REBOA may be utilised is unknown. We conducted a population based analysis of 2012-2013 Trauma Audit and Research Network (TARN) data. We identified the number of patients in whom REBOA may have been utilised, defined by an Abbreviated Injury Scale score ≥3 to abdominal solid organs, abdominal or pelvic vasculature, pelvic fracture with ring disruption or proximal traumatic lower limb amputation, together with a systolic blood pressure <90 mm Hg. Patients with non-compressible haemorrhage in the mediastinum, axilla, face or neck were excluded. During 2012-2013, 72 677 adult trauma patients admitted to hospitals in England and Wales were identified. 397 patients had an indication(s) and no contraindications for REBOA with evidence of haemorrhagic shock: 69% men, median age 43 years and median Injury Severity Score 32. Overall mortality was 32%. Major trauma centres (MTCs) received the highest concentration of potential REBOA patients, and would be anticipated to receive a patient in whom REBOA may be utilised every 95 days, increasing to every 46 days in the 10 MTCs with the highest attendance of this injury type. This TARN database analysis has identified a small group of severely injured, resource intensive patients with a highly lethal injury that is theoretically amenable to REBOA. The highest density of these patients is seen at MTCs, and as such a planned evaluation of REBOA should be further considered in these hospitals. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

  20. Military-civilian partnership in device innovation: development, commercialization and application of Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA).

    Science.gov (United States)

    Rasmussen, Todd E; Eliason, Jonathan L

    2017-07-19

    Noncompressible torso hemorrhage (NCTH) and shock is a leading cause of trauma-related mortality and evidence suggests that survival from this injury pattern has not improved in decades. As such, innovating new approaches and devices, including technologies which can be used by providers within a short of time after severe injury, is a priority for the military. Guided by wartime observations, and through partnerships with civilian academia and private investment, the military has led an effort to define resuscitative endovascular balloon occlusion of the aorta (REBOA) and assess its potential to address this problem. The result of this effort is development and commercialization of new REBOA-specific device referred to as the ER-REBOA™ catheter. This device has been approved by regulatory agencies in the US and abroad and is now being used in civilian trauma centers and by military teams in the deployed setting. Despite excellent device performance and an empiric benefit of its use, there remains skepticism over this disruptive change in practice and an expressed need for more robust data to prove its effectiveness. This commentary reviews of the origins of the REBOA effort and the ER-REBOA™ catheter and outlines key factors influencing its development, commercialization and implementation. This essay also outlines post-market surveillance mechanisms which are tracking use of the ER-REBOA™ catheter as well as plans for prospective, multi-center studies of REBOA in the U.S. and U.K. With this reset on the origins, rationale and progress of REBOA, it's hoped that military-civilian partnerships in this endeavor can be strengthened and that debate of this topic can be evidence-based, balanced and productive.

  1. Emergent intracranial balloon angioplasty and bailout self-expandable stent placement in acute large vessel occlusion of the anterior circulation: Experience of a single institution

    Energy Technology Data Exchange (ETDEWEB)

    Heo, Young Jin; Seo, Jung Hwa; Jeong, Hae Woong [Busan Paik Hospital, Inje University, Busan (Korea, Republic of)

    2017-06-15

    To evaluate the outcomes of angioplasty for recanalization after acute ischemic stroke (AIS). The study population was selected from 134 patients who underwent endovascular revascularization therapy (ERT) for AIS between October 2011 and May 2014. Of those 134 patients, 39 who underwent balloon angioplasty with or without stent insertion were included in this study. Balloon angioplasty was the primary treatment for nine patients and a rescue method for 30 patients. The revascularization rate at 7 days, procedure-related complications, and clinical outcomes at 3 months were analyzed. The occlusion sites were the middle cerebral artery (n = 26), intracranial internal carotid artery (n = 10), and middle cerebral artery branch (n = 3). Angioplasty achieved successful revascularization (Thrombolysis in Cerebral Ischemia grade 2b–3) in 76.9% of patients. Computed tomography angiography performed 7 days post-procedure revealed a maintained reperfusion in 82.8% of successful cases. Only two patients had symptomatic intracerebral hemorrhage. At the 3-month follow-up, 18 (48.6%) and 10 (27.0%) patients showed good and poor functional outcomes, respectively (modified Rankin Scale scores, 0–2 and 5–6). Emergent balloon angioplasty and bailout self-expandable stent placement may be safe and effective for achieving successful revascularization in acute large vessel occlusion of the anterior circulation. It could be a feasible rescue method as well as a primary method for ERT.

  2. Effectiveness of CO2-insufflated endoscopic submucosal dissection with the duodenal balloon occlusion method for early esophageal or gastric cancer: a randomized case control prospective study

    Directory of Open Access Journals (Sweden)

    Mori Hirohito

    2012-04-01

    Full Text Available Abstract Background Endoscopic submucosal dissection (ESD has typically been performed using air insufflation. Recently, however, insufflation of CO2 has been increasingly used to avoid complications. This prospective study was designed to compare the CO2 concentration, intestinal volume, and acid–base balance using the duodenal balloon procedure. Methods From June 2010 to February 2011, we enrolled 44 patients with esophageal or gastric cancer and randomly allocated them into two groups. We compared 22 patients undergoing CO2-insufflated ESD with a balloon placed into the duodenal bulb (duodenal balloon group and 22 patients undergoing regular CO2-insufflated ESD (regular group. Three-dimensional computed tomography was performed before and after the procedure to measure intestinal volume. CO2 concentrations were measured every 10 minutes. The visual analogue system (VAS scores for postoperative symptoms were recorded, and pH was measured immediately after the procedure. This was a prospective case control study randomized by the sealed envelope method. Results Intestinal CO2 gas volume before and after ESD was lower in the duodenal balloon group than in the regular group (P = 0.00027. The end-tidal CO2 level was significantly lower in the duodenal balloon group than in the regular group (P = 0.0001. No significant differences in blood ΔpH were found between the two groups. The VAS score for the occurrence of nausea due to abdominal distension after ESD indicated a significant difference (P = 0.031. Conclusions ESD using the duodenal balloon occlusion method is effective for reduction of post-ESD intestinal CO2 gas volume, resulting in a lower total amount of CO2 insufflation during ESD and reducing harmful influences on the human body to some extent.

  3. Stunning and Right Ventricular Dysfunction Is Induced by Coronary Balloon Occlusion and Rapid Pacing in Humans: Insights From Right Ventricular Conductance Catheter Studies.

    Science.gov (United States)

    Axell, Richard G; Giblett, Joel P; White, Paul A; Klein, Andrew; Hampton-Til, James; O'Sullivan, Michael; Braganza, Denise; Davies, William R; West, Nick E J; Densem, Cameron G; Hoole, Stephen P

    2017-06-06

    We sought to determine whether right ventricular stunning could be detected after supply (during coronary balloon occlusion [BO]) and supply/demand ischemia (induced by rapid pacing [RP] during transcatheter aortic valve replacement) in humans. Ten subjects with single-vessel right coronary artery disease undergoing percutaneous coronary intervention with normal ventricular function were studied in the BO group. Ten subjects undergoing transfemoral transcatheter aortic valve replacement were studied in the RP group. In both, a conductance catheter was placed into the right ventricle, and pressure volume loops were recorded at baseline and for intervals over 15 minutes after a low-pressure BO for 1 minute or a cumulative duration of RP for up to 1 minute. Ischemia-induced diastolic dysfunction was seen 1 minute after RP (end-diastolic pressure [mm Hg]: 8.1±4.2 versus 12.1±4.1, P right coronary artery balloon occlusion both cause ischemic right ventricular dysfunction with stunning observed later during the procedure. This may have intraoperative implications in patients without right ventricular functional reserve. © 2017 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

  4. Acute embolic occlusion of the right common iliac artery after revision total hip arthroplasty treated with catheter-directed thrombolysis and balloon angioplasty: A case report

    Directory of Open Access Journals (Sweden)

    Hongqi Yang

    2015-07-01

    Full Text Available Methods: A 63-year-old woman with atrial fibrillation presented clinical symptoms and signs of acute ischemia in the right lower extremity on the 17th postoperative day after revision total hip arthroplasty of the left hip for aseptic loosening of femoral component. Aspirin was discontinued 7 days before surgery. Both computed tomography angiography and digital subtraction angiography demonstrated complete occlusion of the right common iliac artery. An emergency catheter-directed thrombolysis with urokinase combined with balloon angioplasty was performed to obtain complete patency of the right common iliac artery. Results: The patient received anticoagulation and antiplatelet therapy postoperatively and was fine at the 2-year follow-up. Conclusions: This case demonstrated that catheter-directed thrombolysis combined with balloon angioplasty could be an efficacious, minimally invasive approach for the treatment of acute embolic occlusion of the common iliac artery. Preoperative anticoagulation for patients undergoing total hip arthroplasty with long-term use of aspirin for atrial fibrillation needs further investigation.

  5. Clinical efficacy, safety, and costs of percutaneous occlusive balloon catheter-assisted ureteroscopic lithotripsy for large impacted proximal ureteral calculi: a prospective, randomized study.

    Science.gov (United States)

    Qi, Shiyong; Li, Yanni; Liu, Xu; Zhang, Changwen; Zhang, Hongtuan; Zhang, Zhihong; Xu, Yong

    2014-09-01

    To evaluate the clinical efficacy, safety, and costs of percutaneous occlusive balloon catheter-assisted ureteroscopic lithotripsy (POBC-URSL) for large impacted proximal ureteral calculi. 156 patients with impacted proximal ureteral stones ≥1.5 cm in size were randomized to ureteroscopic lithotripsy (URSL), POBC-URSL, and percutaneous nephrolithotomy (PNL) group between May 2010 and May 2013. For URSL, the calculi were disintegrated with the assistance of anti-retropulsion devices. POBC-URSL was performed with the assistance of an 8F percutaneous occlusive balloon catheter. PNL was finished with the combination of an ultrasonic and a pneumatic lithotripter. A flexible ureteroscope and a 200 μm laser fiber were used to achieve stone-free status to a large extent for each group. Variables studied were mean operative time, auxiliary procedure, postoperative hospital stay, operation-related complications, stone clearance rate, and treatment costs. The mean lithotripsy time for POBC-URSL was shorter than URSL, but longer than PNL (42.6±8.9 minutes vs 66.7±15.3 minutes vs 28.1±6.3 minutes, p=0.014). The auxiliary procedure rate and postoperative fever rate for POBC-URSL were significantly lower than URSL and comparable to PNL (pPNL (98.1% vs 75.0% vs 96.2%, pPNL group and similar to URSL group (p=0.016, pPNL.

  6. The Effect Of Supraphysiologic Blood Pressure on Traumatic Brain Injury and Proximal Tissue Beds During Resuscitative Balloon Occlusion of the Aorta and Variable Aortic Control in a Porcine Model (Sus scrofa) of Polytrauma.

    Science.gov (United States)

    2017-04-27

    Supraphysiologic Blood Pressure On Traumatic Brain Injury And Proximal Tissue Beds During Resuscitative Balloon Occlusion Of The Aorta And Variable Aortic...Mandatory) The Effect of REBOA, Partial Aortic Occlusion and Aggressive Blood Transfusion on Traumatic Brain Injury in a Swine Polytrauma Model...Objectives: Despite clinical reports of poor outcomes, the degree to which REBOA exacerbates traumatic brain injury (TBI) is not known. We hypothesized that

  7. First-in-man experience of self-expanding nitinol stents combined with drug-coated balloon in the treatment of femoropopliteal occlusive disease.

    Science.gov (United States)

    Mwipatayi, Bibombe Patrice; Perera, Kalpa; Daneshmand, Ali; Daniel, Rhys; Wong, Jackie; Thomas, Shannon D; Burrows, Sally A

    2018-02-01

    Purpose The present study aimed to determine the safety and efficacy of a drug-coated balloon inflated within a thin-strut self-expanding bare-metal stent in patients with severe and complex femoropopliteal occlusive disease. Methods This prospective study used the Pulsar-self-expanding stent and Passeo-18 Lux drug-coated balloon in patients with severe and complex femoropopliteal occlusive disease. The primary endpoint was the 12-month primary patency, and the secondary endpoints included 24-month primary patency, assisted primary patency, secondary patency, and clinically associated target lesion revascularisation. Results The study included 44 patients (51 limbs). The mean age of the patients was 67.6 ± 10.2 years, with 73% men. Chronic limb severity was classified as Rutherford Category III in 41% of the patients, stage IV in 31%, and stage V in 27%. Lesions were predominantly Trans-Atlantic Inter-Society Consensus (TASC 2007) D (51%) and C (45%), with 32 (63%) chronic total occlusions. Procedural success was obtained in all cases. The mean lesion length was 200 ± 74.55 mm (95% CI = 167.09-208.01) with a mean number of stents per limb used of 1.57 ± 0.70 (95% CI = 1.37-1.76). Distal embolisation occurred in two patients. The primary patency rates at the 12- and 24-month follow-up were 94% (95% CI = 82.9-98.1) and 88% (95% CI = 75.7-94.5), respectively. The assisted primary was 94% (95% CI = 82.9-98.1) and secondary patency was 96% (95% CI = 85.2-99.0) at 24-month follow-up. The cumulative stent fracture rate at the 24-month follow-up was 10%. Freedom from clinically driven target lesion revascularisation was 94% (95% CI = 83-98%) at 12-month follow-up and 88% (95% CI = 76-94%) at 24-month follow-up, with two patients requiring a bypass graft. Conclusion Our novel approach involving the combination of a thin-strut bare-metal stent and a drug-coated balloon may be safe and effective, with sustainable and promising

  8. Assessing the Hemodynamic Effects of Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA) in Traumatic Cardiac Arrest When Closed Chest Compressions are Augmented by Directing the Area of Maximal Compression Over the Left Ventricle in a Swine Model (sus scrofa)

    Science.gov (United States)

    2016-09-15

    Assessing the hemodynamic effects of Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA) in traumatic cardiac arrest when closed...groups with REBOA. 7. How may your findings benefit the Air Force? Survival of military traumatic cardiopulmonary arrest (TCPA) victims is low...Although a statistically significant difference was not determined in this study, the trend of increased survival definitely warrants further study

  9. Coronary stent implantation is superior to balloon angioplasty for chronic coronary occlusions: six-year clinical follow-up of the GISSOC trial.

    Science.gov (United States)

    Rubartelli, Paolo; Verna, Edoardo; Niccoli, Luigi; Giachero, Corinna; Zimarino, Marco; Bernardi, Guglielmo; Vassanelli, Corrado; Campolo, Luigi; Martuscelli, Eugenio

    2003-05-07

    We investigated whether the benefits of stent implantation over balloon percutaneous transluminal coronary angioplasty (PTCA) for treatment of chronic total coronary occlusions (CTO) are maintained in the long term. Several randomized trials have shown that in CTO, stent implantation confers clinical and angiographic mid-term outcomes superior to those observed after PTCA. However, limited information on the long-term results of either technique is available. Six-year clinical follow-up of patients enrolled in the Gruppo Italiano di Studio sullo Stent nelle Occlusioni Coronariche (GISSOC) trial was performed by direct visit or telephone interview. Major adverse cardiac events (MACE), defined as cardiac death, myocardial infarction, target lesion revascularization (TLR), and anginal status, were recorded. Freedom from MACE at six years was 76.1% in the stent group, compared with 60.4% in the PTCA group (p = 0.0555). This difference was due mainly to TLR-free survival rates (85.1% vs. 65.5% for the stent and PTCA groups, respectively; p = 0.0165). Eleven patients underwent TLR after the nine-month follow-up visit (stent group: n = 5; PTCA group: n = 6); however, in most cases, restenosis of the study occlusion was evident at nine-month angiography. This study represents the longest reported clinical follow-up of patients after percutaneous recanalization of CTO and demonstrates that the superiority of stent implantation over balloon PTCA is maintained in the long term. Stent and PTCA results appear to remain stable after nine-month angiographic follow-up. Stent implantation in CTO that can be recanalized percutaneously is therefore a valuable long-term therapeutic option.

  10. Electrophysiological and Histological Evaluation of Acute Efficacy and Safety of Balloon Occlusive Ablation at Superior Vena Cava-Right Atrial Junction

    Directory of Open Access Journals (Sweden)

    Kazushi Tanaka, MD

    2007-01-01

    Full Text Available We evaluated efficacy and safety of occlusive radiofrequency catheter ablation (o-RFA using our thermal balloon catheter (TBC at superior vena cava (SVC-right atrial (RA junction (SVCJ compared to that of RFA with a standard-tip catheter. Methods: To electrically isolate (SVCI SVC from RA in 10 pigs (group 1, the initial o-RFA at a balloon surface temperature of 53.9 ± 3.0°C for 3–5 min (13.56 MHz was achieved at the SVCJ completely obstructed with an inflated balloon. If unsuccessful, subsequent o-RFA was repeated in a ࣘ5°C increments until reaching either SVCI or sinus arrest. Before and after each o-RFA, stimulation protocol from the RA was performed. Additionally, in 5 different pigs (group 2, RFA at 55°C (ࣘ50 W for 1 min with a 4 mm-tip catheter was achieved at multiple sites along the SVCJ. Finally, the neighboring tissues of the SVCJ were histologically investigated. Results: In group 1, successful SVCI could be easily accomplished at the final temperature of 57.2 ± 2.4°C; however, in 3 pigs, a new atrial tachycardia was induced after o-RFA at <55°C and in 2 pigs sinus arrest occurred during o-RFA at 60°C. Histologically, transmural and circumferential contraction band necrosis was mainly confirmed around the SVCJ without damage to collateral tissue. In group 2, coagulation necrosis occupied almost all the ablative lesions, leading to severe degeneration of collateral tissue. Conclusion: O-RFA at the SVCJ may be more feasible and safer than RFA.

  11. PROTECT: PRoximal balloon Occlusion TogEther with direCt Thrombus aspiration during stent retriever thrombectomy - evaluation of a double embolic protection approach in endovascular stroke treatment.

    Science.gov (United States)

    Maegerlein, Christian; Mönch, Sebastian; Boeckh-Behrens, Tobias; Lehm, Manuel; Hedderich, Dennis M; Berndt, Maria Teresa; Wunderlich, Silke; Zimmer, Claus; Kaesmacher, Johannes; Friedrich, Benjamin

    2017-12-08

    Stent retriever-based mechanical thrombectomy (MT) for emergent large vessel occlusions (ELVO) is often complicated by thrombus fragmentation causing distal embolization and embolization to new vascular territories. Well-established embolic protection approaches include proximal flow arrest and distal aspiration techniques during stent retriever maneuvers. Aiming at the reduction of thrombus fragmentation during MT we evaluated a technical approach combining proximal balloon occlusion together with direct thrombus aspiration during MT: the PROTECT technique. We performed a case-control study comparing the PROTECT technique with sole distal aspiration during MT regarding technical and procedural parameters, n=200 patients with ELVO of either the terminus of the internal carotid artery or the proximal middle artery were included. PROTECT resulted in a shorter procedure time (29 vs 40 min; P=0.002), in a higher rate of successful recanalizations (100% vs 78%; P=0.001) and a higher rate of complete reperfusions (70% vs 39%; P<0.001) compared with sole distal aspiration during MT. The PROTECT technique is a promising new approach to significantly reduce thrombus fragmentation and, hence distal embolization during MT. This safe and efficient technique needs to be validated in larger trials to confirm our results. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  12. Brain SPECT imaging with blood flow markers in epilepsy and balloon occlusion; Hirn-SPECT mit Durchblutungsmarkern in der Epilepsiediagnostik und bei der Ballon-Okklusion

    Energy Technology Data Exchange (ETDEWEB)

    Gruenwald, F. [Bonn Univ. (Germany). Klinik und Poliklinik fuer Nuklearmedizin

    1996-02-01

    Brain SPECT imaging is used as a routine technique in presurgical evaluation. In three fields (focus detection, prognosis, stimulation) the value of brain SPECT imaging in cost effective patient management is presented in this paper. Interictal and ictal brain SPECT imaging are used to detect the epileptic focus and are a powerful tool during implantation of subdural or depth electrodes, being able to replace an `invasive` evaluation in some cases. Brain SPECT can be used to estimate the patients` postoperative outcome (memory, seizure frequency). Using activation imaging, the functional activity of brain regions can be estimated prior to resection of larger areas. In balloon occlusion, the blood flow pattern during the occlusion and the risk of ischemia after resection or permanent occlusion of the careotid artery can be estimated by means of brain SPECT. (orig.) [Deutsch] Die Hirn-SPECT-Untersuchung hat inzwischen einen festen Platz in der praechirurgischen Epilepsiediagnostik. Anhand von drei Einsatzgebieten innerhalb dieser Thematik (Fokussuche, Prognose, Stimulationsuntersuchung) wird gezeigt, dass die Indikation zur Hirn-SPECT auch unter Kosten-Nutzen-Aspekten gestellt werden kann. Iktale und interiktale Untersuchungen werden im Rahmen der Fokussuche eingesetzt und koennen bei der Implantation von Subdural- oder Tiefen-Elektroden hilfreich sein und in einzelnen Faellen eine invasive Abklaerung ersetzen. Der Hirn-SPECT-Befund kann zur Abschaetzung des postoperativen `outcome` (Gedaechtnis, Anfallsfrequenz) beitragen. Mittels Aktivierungsuntersuchungen kann vor groesseren resektiven Eingriffen die funktionelle Aktivitaet von Hirnarealen beurteilt werden. Bei der Ballon-Okklusion ist es mit Hilfe der Hirn-SPECT-Untersuchung praeoperativ moeglich, die Durchblutungsverhaeltnisse waehrend der Okklusion und damit das Risiko einer Ischaemie nach Resektion oder permanenter Okklusion zu beurteilen. (orig.)

  13. Quantifying increased hepatic arterial flow with test balloon occlusion of the splenic artery in liver transplant recipients with suspected splenic steal syndrome: quantitative digitally subtracted angiography correlation with arterial Doppler parameters.

    Science.gov (United States)

    Saad, Wael E; Anderson, Curtis L; Kowarschik, Markus; Turba, Ulku C; Schmitt, Timothy M; Kumer, Sean C; Matsumoto, Alan H; Angle, John F

    2012-07-01

    The purpose of this study is to quantify hepatic arterial flow (HAF) in liver transplants with splenic steal syndrome (SSS) pre- and post-test balloon occlusion of the splenic artery utilizing Doppler ultrasound (DUS) and quantitative digitally subtracted angiography (Q-DSA). A total of 193 liver transplants were evaluated retrospectively. Hepatic arterial velocity (HAV) and HAF were calculated utilizing DUS and Q-DSA (i-flow prototype, Siemens) pre- and post-splenic artery balloon occlusion. The rate of HAF increase, total HAF, and peak contrast density (PKD) by Q-DSA were compared with HAF by DUS. Of all, 4 suspected SSS cases underwent test-balloon occlusion with DUS and Q-DSA. Using DUS, HAV and HAF increased by 1.6- to 1.8-fold and 1.7- to 2.6-fold, respectively. Using Q-DSA, the HAF rate, total HAF, and PKD increased by 1.1 to 12.8, 1.5 to 7.6, and 1.3 to 5.3, respectively. Occlusion of the splenic artery in liver transplants with SSS doubles the HAF (+1.7- to 2.6-fold). The Q-DSA parameters correlate qualitatively but overestimate the resultant increased HAF.

  14. Management of post-surgical biliary leakage with percutaneous transhepatic biliary drainage (PTBD) and occlusion balloon (OB) in patients without dilatation of the biliary tree: preliminary results

    Energy Technology Data Exchange (ETDEWEB)

    Pedicini, Vittorio; Poretti, Dario; Brambilla, Giorgio [Humanitas Clinical Institute, Department of Diagnostic Imaging, Rozzano, Milan (Italy); Mauri, Giovanni; Trimboli, Manuela [Humanitas Clinical Institute, Department of Diagnostic Imaging, Rozzano, Milan (Italy); University of Milan School of Medicine, Unit of Radiology, Ospedale San Paolo, Milan (Italy); Sconfienza, Luca Maria; Sardanelli, Francesco [University of Milan School of Medicine, Unit of Radiology, IRCCS Policlinico San Donato, Department of Medical and Surgical Sciences, Milan (Italy); Cornalba, Gianpaolo [University of Milan School of Medicine, Unit of Radiology, Ospedale San Paolo, Milan (Italy)

    2010-05-15

    To compare the outcome of patients affected by biliary leak after major biliary surgery and treated with percutaneous transhepatic biliary drainage (PTBD) alone with that of similar patients treated with PTBD and concurrent positioning of an occlusion balloon (PTBD-OB). We retrospectively reviewed the results of the use of PTBD or PTBD-OB performed at our institution from 2004 to 2008 in patients with post-surgical biliary leak. Sixteen patients entered the evaluation. PTDB alone was performed in 9 men (age 59.7 {+-} 13.4 years [mean {+-} standard deviation]; median 60 years), while PTBD-OB was performed in 7 patients (5 men, 2 women, age 71.3 {+-} 9.3 years; median 68 years). No significant difference between groups was found regarding age (p = 0.064) and sex (p = 0.175) distribution, number of procedures (3.1 {+-} 1.62; 2 vs 1.7 {+-} 1.1; 1, p = 0.151), and days of disease before recovery, death or modification of treatment (51.6 {+-} 66.8; 23 vs 18.6 {+-} 15.1; 14, p = 0.266). The number of patients treated with PTBD-OB who fully recovered (7/7, 100%) was significantly higher than that of patients treated with PTBD alone (4/9, 44%, p = 0.034). This procedure appears to be clinically effective, being associated with a higher probability of recovery in patients treated for post-surgical biliary leak. Further studies are needed to confirm these preliminary results. (orig.)

  15. Management of post-surgical biliary leakage with percutaneous transhepatic biliary drainage (PTBD) and occlusion balloon (OB) in patients without dilatation of the biliary tree: preliminary results.

    Science.gov (United States)

    Pedicini, Vittorio; Poretti, Dario; Mauri, Giovanni; Trimboli, Manuela; Brambilla, Giorgio; Sconfienza, Luca Maria; Cornalba, Gianpaolo; Sardanelli, Francesco

    2010-05-01

    To compare the outcome of patients affected by biliary leak after major biliary surgery and treated with percutaneous transhepatic biliary drainage (PTBD) alone with that of similar patients treated with PTBD and concurrent positioning of an occlusion balloon (PTBD-OB). We retrospectively reviewed the results of the use of PTBD or PTBD-OB performed at our institution from 2004 to 2008 in patients with post-surgical biliary leak. Sixteen patients entered the evaluation. PTDB alone was performed in 9 men (age 59.7 +/- 13.4 years [mean +/- standard deviation]; median 60 years), while PTBD-OB was performed in 7 patients (5 men, 2 women, age 71.3 +/- 9.3 years; median 68 years). No significant difference between groups was found regarding age (p = 0.064) and sex (p = 0.175) distribution, number of procedures (3.1 +/- 1.62; 2 vs 1.7 +/- 1.1; 1, p = 0.151), and days of disease before recovery, death or modification of treatment (51.6 +/- 66.8; 23 vs 18.6 +/- 15.1; 14, p = 0.266). The number of patients treated with PTBD-OB who fully recovered (7/7, 100%) was significantly higher than that of patients treated with PTBD alone (4/9, 44%, p = 0.034). This procedure appears to be clinically effective, being associated with a higher probability of recovery in patients treated for post-surgical biliary leak. Further studies are needed to confirm these preliminary results.

  16. Clinical and histological effects of the temporary occlusion of the rabbit nasolacrimal duct and point using cyanoacrylate adhesives

    Directory of Open Access Journals (Sweden)

    K.C.F. Cardoso

    2013-12-01

    Full Text Available The objective of this study was to evaluate the clinical and histological effects of occluding the nasolacrimal ducts and points of rabbits. For this study, 20 adult New Zealand rabbits, both males and females, weighing 3.2±0.4kg were allocated into two groups for n-butyl-cyanoacrylate occlusion (GB, n=10 or 2-octyl-cyanoacrylate occlusion (GO, n=10. The contralateral eyes served as the controls. The persistence of tears was evaluated daily using the Schirmer I test. Discomfort, eye discharge, epiphora, and conjunctival hyperemia were assessed prior to the procedure (T0 and during the 14 subsequent days (T1-T14. On days seven and 14, five animals from each group were euthanized, and their nasolacrimal ducts were collected, processed and analyzed by histology. In the GB group, the Schirmer test values differed from that at T0 at all of the subsequent time points, whereas there was no difference in the values observed from the GO group. Compared with the corresponding controls, the GO and GB groups differed significantly at almost all of the time points. When comparing the treatment groups, differences were found at T6, T7, T9, T10, T11, T12 and T14, with higher Schirmer values in the GB group. Epiphora was observed in the GB group from T1 to T8 and in the GO group from T1 to T6. Within seven days post-occlusion, histology revealed a moderate foreign body reaction, with marked necrosis and sloughing of the canalicular epithelium, in the GO group, which was absent at day 14. In the GB group, a marked inflammatory reaction and a mild foreign body reaction were found at day seven, and the foreign body reaction was prevalent at day 14. This study demonstrated that both adhesives were effective in obstructing the nasolacrimal ducts and points of rabbits and that their application and handling are easy and free of complications. However, both adhesives promoted inflammatory and foreign body reactions that evolved to repair and regeneration at day 14 of

  17. A complex dissected chronic occlusion: targeted balloon dilatation of false lumen to access true lumen, combined localized subintimal tracking and reentry, parallel wire, contralateral injection and a useful antegrade lumen re-entry technique

    Directory of Open Access Journals (Sweden)

    James W. Tam

    2012-02-01

    Full Text Available Chronic total occlusion (CTO angioplasty is one of the most challenging procedures remaining for the interventional operator. Recanalizing CTOs can improve exercise capacity, symptoms, left ventricular function and possibly reduce mortality. Multiple strategies such as escalating wire, parallel wire, seesaw, contralateral injection, subintimal tracking and re-entry (STAR, retrograde wire techniques (controlled antegrade retrograde subintimal tracking, CART, reverse CART, confluent balloon, rendezvous in coronary, and other techniques have all been described. Selection of the most appropriate approach is based on assessment of vessel course, length of occluded segment, presence of bridging collaterals, presence of bifurcating side branches at the occlusion site, and other variables. Today, with significant operator expertise and the use of available techniques, the literature reports a 50-95% success rate for recanalizing CTOs.

  18. Temporary occlusion of the inferior lacrimal punctum and canaliculi of dogs with n-butyl-cyanoacrylate and 2-octyl-cyanoacrylate

    Directory of Open Access Journals (Sweden)

    Cristiane dos Santos Honsho

    2014-09-01

    Full Text Available The occlusion of the inferior lacrimal punctum limits tear drainage and thus keeps it over the ocular surface, prolongs lubrication and minimizes the need of ocular lubricants. The aim of this study was to evaluate the effectiveness of n-butyl-cyanoacrylate and 2-octyl-cyanoacrylate adhesives in the occlusion of the inferior lacrimal punctum and canaliculi of dogs and their clinical repercussions over 180 days. Eleven dogs, were divided into two groups: occlusion with n-butyl-cyanoacrylate (GB, n=6 and with 2-octyl-cyanoacrylate (GO, n=5. Tear production, blepharospasm, ocular discharge, epiphora and conjunctival hyperemia were analyzed before the procedure and on days (T 3,7,15, 30, 45, 60, 90, 120, 150 and 180 after the procedure. Tear production of GB was significantly higher at T90 (P=0.0282 than its control. Variations between days showed that T7 (P=0.0069 and T180 (P=0.0207 varied significantly from T0. In the GO group, when treatment was compared to control, T15 (P<0.001 was significantly different from the rest. Variations between days showed that T15 was significantly different than T0 (P=0.0044, T3 (P=0.0234, T60 (P=0.0207 and T90 (P=0.0482. No significant difference was observed between the treatment groups at any given time. It was concluded that both adhesives were effective in occluding lacrimal drainage for long periods and could thus be considered as therapeutic options in treating animals with lacrimal deficiency

  19. BALLOON SUPPORT,

    Science.gov (United States)

    Two instrument bearing arrays were supported by balloons on the Double Tracks event. One large balloon supported a 750-foot high by 1,500-foot wide...array at 2,500 feet downwind from ground zero, and 8 small evenly spaced balloons supported instruments up to 1,000 feet high over a 7,500foot wide...area at 13,000 feet downwind from ground zero. Air samplers, cascade impactors, and sticky cylinders were supported by the arrays. The balloons used for

  20. A comparison of Selective Aortic Arch Perfusion and Resuscitative Endovascular Balloon Occlusion of the Aorta for the management of hemorrhage-induced traumatic cardiac arrest: A translational model in large swine.

    Science.gov (United States)

    Barnard, Ed B G; Manning, James E; Smith, Jason E; Rall, Jason M; Cox, Jennifer M; Ross, James D

    2017-07-01

    Survival rates remain low after hemorrhage-induced traumatic cardiac arrest (TCA). Noncompressible torso hemorrhage (NCTH) is a major cause of potentially survivable trauma death. Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA) at the thoracic aorta (Zone 1) can limit subdiaphragmatic blood loss and allow for IV fluid resuscitation when intrinsic cardiac activity is still present. Selective Aortic Arch Perfusion (SAAP) combines thoracic aortic balloon hemorrhage control with intra-aortic oxygenated perfusion to achieve return of spontaneous circulation (ROSC) when cardiac arrest has occurred. Male Yorkshire Landrace cross swine (80.0 ± 6.0 kg) underwent anesthesia, instrumentation for monitoring, and splenectomy. TCA was induced by laparoscopic liver lobe resection combined with arterial catheter blood withdrawal to achieve a sustained systolic blood pressure cardiac arrest. After 3 min of arrest, swine were allocated to one of three interventions: (1) REBOA plus 4 units of IV fresh whole blood (FWB), (2) SAAP with oxygenated lactated Ringer's (LR), 1,600 mL/2 min, or (3) SAAP with oxygenated FWB 1,600 mL/2 min. Primary endpoint was survival to the end of 60 min of resuscitation, a simulated prehospital phase. Thirty animals were allocated to 3 groups (10 per group)-5 protocol exclusions resulted in a total of 35 animals being used. Baseline measurements and time to cardiac arrest were not different amongst groups. ROSC was achieved in 0/10 (0%, 95% CI 0.00-30.9) REBOA, 6/10 (60%, 95% CI 26.2-87.8) SAAP-LR and 10/10 (100%, 95% CI 69.2-100.0) SAAP-FWB animals, p Cardiac arrest in this study was defined by intra-aortic pressure monitoring that is not feasible in clinical practice, and as such limits the generalizability of findings. Clinical trials are needed to determine if the beneficial effects of SAAP-FWB observed in this laboratory study will translate into improved survival in clinical practice. SAAP conferred a superior short-term survival

  1. Radiofrequency ablation of lung metastases close to large vessels during vascular occlusion: preliminary experience.

    Science.gov (United States)

    de Baere, Thierry; Robinson, Joey Marie; Rao, Pramod; Teriitehau, Christophe; Deschamps, Frederic

    2011-06-01

    To report an initial prospective evaluation of the technical feasibility, efficacy, and safety of combining percutaneous temporary balloon occlusion (PBO) of a large pulmonary artery adjacent to a metastatic lung tumor treated with percutaneous radiofrequency (RF) ablation. In six patients, lung RF ablation with a multitined, expandable electrode with simultaneous PBO via femoral access was attempted with the use of digital angiography and multidetector computed tomography (CT). Follow-up imaging was obtained immediately after treatment, at 1-2 days, and at 2, 6, 9, and 12 months; positron emission tomography/CT was performed at 4 months. Metastases targeted measured 17-37 mm (22 ± 8) and were in contact with a pulmonary artery 3-5 mm. Temporary occlusion of the pulmonary arterial branch in contact with the tumor was technically possible in five of six patients. Postablation CT scans obtained within 2 days of the procedure showed ablation zones measuring 37-57 mm (47 ± 8) in their shortest diameter. Three patients developed lung infarction within 1 month after RF ablation, and two had to be readmitted. At 3 months after the procedure, four patients had persistent occlusion of the balloon-occluded vessel. No uptake was demonstrated 4 months after ablation; at 12 months, all tumors showed complete ablation on CT. RF ablation of lung tumors with PBO is a feasible technique, but it induces atelectasia and long-lasting vascular occlusion responsible for a high rate of readmission. The results of this small study warrant careful further exploration of the benefits of the technique, compared with RF ablation without PBO or other methods of ablative therapy. Copyright © 2011 SIR. Published by Elsevier Inc. All rights reserved.

  2. A comparison of Selective Aortic Arch Perfusion and Resuscitative Endovascular Balloon Occlusion of the Aorta for the management of hemorrhage-induced traumatic cardiac arrest: A translational model in large swine.

    Directory of Open Access Journals (Sweden)

    Ed B G Barnard

    2017-07-01

    Full Text Available Survival rates remain low after hemorrhage-induced traumatic cardiac arrest (TCA. Noncompressible torso hemorrhage (NCTH is a major cause of potentially survivable trauma death. Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA at the thoracic aorta (Zone 1 can limit subdiaphragmatic blood loss and allow for IV fluid resuscitation when intrinsic cardiac activity is still present. Selective Aortic Arch Perfusion (SAAP combines thoracic aortic balloon hemorrhage control with intra-aortic oxygenated perfusion to achieve return of spontaneous circulation (ROSC when cardiac arrest has occurred.Male Yorkshire Landrace cross swine (80.0 ± 6.0 kg underwent anesthesia, instrumentation for monitoring, and splenectomy. TCA was induced by laparoscopic liver lobe resection combined with arterial catheter blood withdrawal to achieve a sustained systolic blood pressure <10 mmHg, cardiac arrest. After 3 min of arrest, swine were allocated to one of three interventions: (1 REBOA plus 4 units of IV fresh whole blood (FWB, (2 SAAP with oxygenated lactated Ringer's (LR, 1,600 mL/2 min, or (3 SAAP with oxygenated FWB 1,600 mL/2 min. Primary endpoint was survival to the end of 60 min of resuscitation, a simulated prehospital phase. Thirty animals were allocated to 3 groups (10 per group-5 protocol exclusions resulted in a total of 35 animals being used. Baseline measurements and time to cardiac arrest were not different amongst groups. ROSC was achieved in 0/10 (0%, 95% CI 0.00-30.9 REBOA, 6/10 (60%, 95% CI 26.2-87.8 SAAP-LR and 10/10 (100%, 95% CI 69.2-100.0 SAAP-FWB animals, p < 0.001. Survival to end of simulated 60-minute prehospital resuscitation was 0/10 (0%, 95% CI 0.00-30.9 for REBOA, 1/10 (10%, 95% CI 0.25-44.5 for SAAP-LR and 9/10 (90%, 95% CI 55.5-99.7 for SAAP-FWB, p < 0.001. Total FWB infusion volume was similar for REBOA (2,452 ± 0 mL and SAAP-FWB (2,250 ± 594 mL. This study was undertaken in laboratory conditions, and as such may have

  3. Occlusal Caries

    DEFF Research Database (Denmark)

    Carvalho, JC; Dige, Irene; Machiulskiene, V

    2016-01-01

    The management of occlusal caries still remains a major challenge for researchers as well as for general practitioners. The present paper reviews and discusses the most up-to-date knowledge and evidence of the biological principles guiding diagnosis, risk assessment, and management of the caries...... process on occlusal surfaces. In addition, it considers the whole spectrum of the caries process on occlusal surfaces, ranging from the molecular ecology of occlusal biofilms to the management of deep occlusal caries lesions. Studies using molecular methods with focus on biofilms in relation to occlusal...... caries should explore the relationship between the function and the structural composition of these biofilms to understand the role of occlusal biofilms in caries development. State-of-the-art measures to evaluate risk for occlusal caries lesion activity, caries incidence, and progression should include...

  4. Change in Imaging Findings on Angiography-Assisted CT During Balloon-Occluded Transcatheter Arterial Chemoembolization for Hepatocellular Carcinoma

    Energy Technology Data Exchange (ETDEWEB)

    Yoshimatsu, Rika [Hiroshima University, Department of Diagnostic Radiology, Institute and Graduate School of Biomedical Sciences (Japan); Yamagami, Takuji, E-mail: yamagami@kochi-u.ac.jp [Kochi University, Department of Radiology (Japan); Ishikawa, Masaki; Kajiwara, Kenji [Hiroshima University, Department of Diagnostic Radiology, Institute and Graduate School of Biomedical Sciences (Japan); Aikata, Hiroshi; Chayama, Kazuaki [Hiroshima University, Department of Gastroenterology and Metabolism, Institute of Biomedical and Health Sciences (Japan); Awai, Kazuo [Hiroshima University, Department of Diagnostic Radiology, Institute and Graduate School of Biomedical Sciences (Japan)

    2016-06-15

    PurposeTo evaluate changes in imaging findings on CT during hepatic arteriography (CTHA) and CT during arterial portography (CTAP) by balloon occlusion of the treated artery and their relationship with iodized oil accumulation in the tumor during balloon-occluded transcatheter arterial chemoembolization (B-TACE).MethodsBoth B-TACE and angiography-assisted CT were performed for 27 hepatocellular carcinomas. Tumor enhancement on selective CTHA with/without balloon occlusion and iodized oil accumulation after B-TACE were evaluated. Tumorous portal perfusion defect size on CTAP was compared with/without balloon occlusion. Factors influencing discrepancies between selective CTHA with/without balloon occlusion and the degree of iodized oil accumulation were investigated.ResultsAmong 27 tumors, tumor enhancement on selective CTHA changed after balloon occlusion in 14 (decreased, 11; increased, 3). In 18 tumors, there was a discrepancy between tumor enhancement on selective CTHA with balloon occlusion and the degree of accumulated iodized oil, which was higher than the tumor enhancement grade in all 18. The tumorous portal perfusion defect on CTAP significantly decreased after balloon occlusion in 18 of 20 tumors (mean decrease from 21.9 to 19.1 mm in diameter; p = 0.0001). No significant factors influenced discrepancies between selective CTHA with/without balloon occlusion. Central area tumor location, poor tumor enhancement on selective CTHA with balloon occlusion, and no decrease in the tumorous portal perfusion defect area on CTAP after balloon occlusion significantly influenced poor iodized oil accumulation in the tumor.ConclusionsTumor enhancement on selective CTHA frequently changed after balloon occlusion, which did not correspond to accumulated iodized oil in most cases.

  5. Long-Term Follow-up After Embolization of Pulmonary Arteriovenous Malformations with Detachable Silicone Balloons

    DEFF Research Database (Denmark)

    Andersen, Poul Erik; Kjeldsen, Anette D

    2008-01-01

    Long-term follow-up results after embolization of 13 pulmonary arteriovenous malformations in 10 patients by use of 14 detachable silicone balloons are given. Patients were followed for a mean of 99 months (range, 63-123 months) with chest x-rays and for a mean of 62 months (range, 3-101 months......) with pulmonary angiography. Fifty-four percent of the balloons were deflated at latest radiographic chest film follow-up, but at pulmonary angiographic follow-up all embolized malformations were without flow irrespective of whether or not the balloons were visible. Detachable silicone balloons are not available...... anymore, but use of these balloons for embolization of pulmonary arteriovenous malformations has been shown to be a safe and precise method, with immediate occlusion of the feeding artery and with long-lasting occlusion, even though many balloons deflate with time, leaving a fibrotic scar replacing...

  6. Punctal occlusion with Prolene suture material in the patients with ...

    African Journals Online (AJOL)

    Aim: To analyze the efficacy and outcomes of punctal occlusion with 5-0 Prolene suture material for the treatment of dry eye. Materials and. Methods: A total of 20 patients with moderate and severe dry eyes, recalcitrant to maximal medical therapy, underwent temporary punctal occlusion with 5-0 Prolene suture material.

  7. Non-touch, Quick Destruction of the Tracheal Occluding Balloon Using HIFU

    OpenAIRE

    OSAWA Shunsuke:筆頭著者; SATO Tomoo; YAMASHITA Hiromasa; MOCHIZUKI Takashi; KITAZUMI Gontaro; JANI Jacques; TOKI Akira; CHIBA Toshio

    2017-01-01

    The technique of fetal endoscopic tracheal occlusion (FETO) was developed to totally occlude the fetal trachea using an intratracheal balloon in the treatment of congenital diaphragmatic hernia with lung hypoplasia. To improve this approach, we developed a method for non-contact, rapid destruction of the balloon using high intensity focused ultrasound (HIFU), a specific balloon injection fluid, and euthanized rabbits (1kg). In an initial experiment (5rabbits), we inflated an intratracheal bal...

  8. Treatment of traumatic carotid cavernous fistulas using detachable balloons

    Energy Technology Data Exchange (ETDEWEB)

    Han, Moon Hee; Han, Joon Koo; Chang, Kee Hyun [Seoul National University College of Medicine, Seoul (Korea, Republic of)

    1989-10-15

    Since the introduction of the concept of detachable balloon technique to occlude arteriovenous fistulas, this technique has become the treatment of choice in the management of traumatic carotid cavernous fistulas (CCF). We tried the occlusion of fistula using detachable balloons in 30 consecutive cases of traumatic CCF and the result of our experience is reported. Transarterial approach with manually-tied latex balloons is tried in all cases and the fistulas were successfully occlude in 28 cases of all. In 20 cases, internal carotid artery was preserved and the arterial lumen was occluded along with fistula opening in 9 cases. In rest of 2 cases, surgical ligation was done because of procedure-related thromboembolism and incomplete occlusion of fistula. We experienced hemiparesis as a major complication in 3 cases. In one of them, the symptom developed during occlusion tolerance test, one just after insertion of guiding catheter into the internal carotid artery, and in one case 2 days after the occlusion of internal carotid artery. In one case, the procedure was performed by the direct puncture of carotid artery because of the ligation of common carotid artery by previous surgery. It is suggested that the systemic heparinization during the procedure is indispensable and starting the procedure with No 9 balloon is considered reasonable.

  9. Retrograde suction decompression of a large internal carotid aneurysm using a balloon guide catheter combined with a blood-returning circuit and STA-MCA bypass: a technical note.

    Science.gov (United States)

    Matano, Fumihiro; Mizunari, Takayuki; Kominami, Shushi; Suzuki, Masanori; Fujiki, Yu; Kubota, Asami; Kobayashi, Shiro; Murai, Yasuo; Morita, Akio

    2017-04-01

    It is difficult to treat large internal carotid aneurysms with simple surgical clipping. Here, we present a retrograde suction decompression (RSD) procedure for large internal carotid aneurysms using a balloon guide catheter combined with a blood-returning circuit and a superficial temporal artery to middle cerebral artery (STA-MCA) bypass.All patients underwent an STA-MCA bypass before the temporary occlusion of the internal carotid artery (ICA). A 6-French sheath was inserted into the common carotid artery (CCA), and a 6-French Patrive balloon catheter was placed into the ICA 5 cm past the bifurcation. Aneurysm exposure was obtained; temporary clips were placed on the proximal M1, A1, and posterior communicating (Pcom) segments; and an extension tube was then connected to the balloon catheter. A three-way stopcock was placed, and aspiration was performed through the device to collapse the aneurysm. The aspirated blood was returned to a venous line with an added heparin to prevent anemia after aspiration. During the decompression, the blood flow to the cortical area was supplied through the STA-MCA bypass. After the aneurysm collapse, the surgeon carefully dissected the perforating artery from the aneurysm dome or neck, and permanent clips were then placed on the aneurysm neck. Our procedure has several advantages, such as STA-MCA bypass without external carotid artery occlusion for preventing ischemic complications of the cortical area, anemia may be avoided because of the return of the aspirated blood, and a hybrid operation room is not required to perform this method.

  10. Oclusión transitoria de comunicación interauricular en el síndrome de Lutembacher Temporary occlusion of atrial septal defect in the Lutembacher syndrome

    Directory of Open Access Journals (Sweden)

    Alejandro E. Contreras

    2011-08-01

    Full Text Available Se describe una paciente de 82 años de edad, con síntomas de insuficiencia cardíaca avanzada e hipertensión arterial pulmonar. Un ecocardiograma transtorácico mostró una comunicación interauricular tipo ostium secundum y estenosis valvular mitral concomitante (síndrome de Lutembacher. La valoración ecocardiográfica de la enfermedad mitral se vio dificultada por la presencia del defecto interauricular. Se realizó test de oclusión percutánea transitoria de la comunicación interauricular, observándose la aparición de estenosis valvular mitral grave. El tamaño del defecto interauricular modificó las manifestaciones clínicas y el test de oclusión transitoria ayudó a decidir la conducta terapéutica.We report the case of an 82 year-old woman with symptoms of advanced heart failure and pulmonary arterial hypertension. An echocardiogram showed an ostium secundum type atrial septal defect and concomitant mitral valve stenosis (Lutembacher syndrome. Echocardiographic assessment of mitral pathology was hampered by the interatrial septal defect. Transient percutaneous occlusion test of the atrial septal defect was performed and severe mitral valve stenosis was detected. Atrial septal defect size modified the clinical manifestations and the transient occlusion test helped to decide the therapeutic strategy.

  11. Occlusion of Pulmonary Arteriovenous Malformations by Use of Vascular Plug

    DEFF Research Database (Denmark)

    Andersen, P E; Kjeldsen, A D

    2007-01-01

    Pulmonary arteriovenous malformations are commonly treated by embolization with coils or balloons to prevent cerebral complications and to raise the oxygenation of the blood. The Amplatzer vascular plug is a new occlusive device made of a self-expanding cylindrical nitinol mesh. It is fast and safe...

  12. Balloon-Assisted Chemoembolization Using a Micro-Balloon Catheter Alongside a Microcatheter for a Hepatocellular Carcinoma with a Prominent Arterioportal Shunt: A Case Report

    Energy Technology Data Exchange (ETDEWEB)

    Hoshiai, Sodai, E-mail: hoshiai@sb4.so-net.ne.jp; Mori, Kensaku; Ishiguro, Toshitaka; Konishi, Takahiro; Uchikawa, Yoko [University of Tsukuba Hospital, Department of Diagnostic and Interventional Radiology (Japan); Fukuda, Kuniaki [University of Tsukuba Hospital, Department of Gastroenterology (Japan); Minami, Manabu [University of Tsukuba Hospital, Department of Diagnostic and Interventional Radiology (Japan)

    2017-04-15

    Although transcatheter arterial chemoembolization is one of the established treatments for hepatocellular carcinoma (HCC), it is difficult to treat HCCs with prominent arterioportal (AP) shunts because anticancer drugs and embolic materials migrate into the non-tumorous liver through the AP shunts and may cause liver infarction. We developed a novel method of balloon-assisted chemoembolization using a micro-balloon catheter alongside a microcatheter simultaneously inserted through a single 4.5-Fr guiding sheath, comprising proximal chemoembolization with distal arterial balloon occlusion. We applied this method to treat an HCC with a prominent distal AP shunt induced by previous proton beam therapy and achieved successful chemoembolization without non-tumorous liver infarction under temporal balloon occlusion of a distal AP shunt.

  13. Factores de riesgo asociados con anomalías de oclusión en dentición temporal: Área III Risk factors associated with occlusion anomalies in temporary dentition: Area III

    Directory of Open Access Journals (Sweden)

    Kenia María León Caballero

    2007-12-01

    Full Text Available Algunos factores de riesgo se encuentran presentes durante el crecimiento del niño y ejercen su influencia en el desarrollo de los maxilares y la dentición. Con el objetivo de determinar factores de riesgo asociados con anomalías de la oclusión, se realizó un estudio descriptivo transversal correlacional, desde mayo del 2005 hasta mayo del 2006. El universo estuvo constituido por 635 niños de 2 a 5 años de edad pertenecientes al área III de salud del municipio Cienfuegos. Se obtuvo una muestra representativa por un método de muestreo probabilística estratificado aleatorio del que resultaron 209 niños a examinar. Se observaron resultados significativos en la presencia de los hábitos deformantes en el 76,1 % de los casos, seguido de la ausencia de diastemas interinsicivos con el 42,6 %, micrognatismo transversal en el 37,3 %, espacio del primate superior ausente (35,9 %, la herencia en el 23,8 %, así como malnutrición y escalón distal en el 3,8 % de los pacientes. Se corroboró la importancia que reviste para los estomatólogos generales integrales conocer y detectar los factores de riesgo presentes desde edades tempranas para evitar anomalías de la oclusión.Some risk factors are present during the growth of children and exert their influence on the development of the maxillaries and dentition. In order to determine the risk factors associated with occlusion anomalies, a descriptive cross-sectional correlational study was conducted from May 2005 to May 2006. The study group was made up of 635 children aged 2-5 from the health area III of Cienfuegos municipality. A representative sample was obtained by a randomized stratified probabilistic sampling method from which 209 children were examined. Significant results were observed in the presence of deforming habits in 76.1 % of the cases, followed by the absence of interincisive diastemas with 42.6 %, transversal micrognathism in 37.3 %, absence of the space of the upper primate (35

  14. Balloon sinuplasty: literature review

    Directory of Open Access Journals (Sweden)

    Carreirão Neto, Waldir

    2008-12-01

    Full Text Available Introduction: The nasosinusal surgery showed a rapid development over the past two decades; but cicatricial stenoses secondary to surgical manipulation still occur, even in the hands of experienced surgeons and, especially, in narrow regions such as the frontal recess. The balloon sinuplasty uses the principle of dilatation of the sinus ostia by balloons guided by catheter. Objective: To present and discuss the surgical technique, indications, costs and results of the balloon sinuplasty, through articles published so far on the subject. Literature's Review: The balloon sinuplasty is an alternative in the treatment of chronic rhinosinusitis. It is not substitute for the functional paranasal sinuses surgery. The use of balloon combined with endoscopic surgical approach may minimize surgical complications such as cicatricial stenosis, especially in regions such as the frontal recess. ICU Patients with a higher anesthetic risk and presenting isolated sphenoid disease may also benefit from the use of the balloon. The possibility of carrying out the dilation with local anesthesia is another advantage. As for the risks, they appear to be low, although there is a possibility of lesion to noble structures as the orbit and skull base. Conclusions: The balloon sinuplasty appears to be a feasible, safe and effective procedure in selected patients. It presents itself as an ancillary therapy and complementary to FESS. It has greater prospects in the treatment of the disease related to the frontal recess, febrile patients in ICU with sinus focus and patients at high anesthetic and bleeding risk.

  15. The Descending Helium Balloon

    Science.gov (United States)

    Helseth, Lars Egil

    2014-01-01

    I describe a simple and fascinating experiment wherein helium leaks out of a rubber balloon, thereby causing it to descend. An estimate of the volumetric leakage rate is made by measuring its rate of descent.

  16. Cyclist's iliac syndrome: temporary relief by balloon angioplasty

    OpenAIRE

    Wijesinghe, L.; Coughlin, P; Robertson, I; Kessel, D; Kent, P.; Kester, R

    2001-01-01

    External iliac stenosis due to endofibrosis is a rare condition that predominantly affects top level cyclists. Short term symptomatic relief is reported in an Olympian after percutaneous transluminal angioplasty, which was performed to allow the patient to return to training without delay.

  17. Hydrogel based occlusion systems

    OpenAIRE

    Stam, F.A.; Jackson, N.; Dubruel, P.; Adesanya, K.; Embrechts, A.; Mendes, E.; Neves, H.P.; Herijgers, P.; Verbrugghe, Y.; Shacham, Y.; Engel, L; Krylov, V.

    2013-01-01

    A hydrogel based occlusion system, a method for occluding vessels, appendages or aneurysms, and a method for hydrogel synthesis are disclosed. The hydrogel based occlusion system includes a hydrogel having a shrunken and a swollen state and a delivery tool configured to deliver the hydrogel to a target occlusion location. The hydrogel is configured to permanently occlude the target occlusion location in the swollen state. The hydrogel may be an electro-activated hydrogel (EAH) which could be ...

  18. Universal stratospheric balloon gradiometer

    Science.gov (United States)

    Tsvetkov, Yury; Filippov, Sergey; Brekhov, Oleg; Nikolaev, Nikolay

    The study of the interior structure of the Earth and laws of its evolution is one of the most difficult problems of natural science. Among the geophysical fields the anomaly magnetic field is one of the most informational in questions of the Earth’s crust structure. Many important parameters of an environment are expedient for measuring at lower altitudes, than satellite ones. So, one of the alternatives is stratospheric balloon survey. The balloon flight altitudes cover the range from 20 to 50 km. At such altitudes there are steady zone air flows due to which the balloon flight trajectories can be of any direction, including round-the-world (round-the-pole). For investigation of Earth's magnetic field one of the examples of such sounding system have been designed, developed and maintained at IZMIRAN and MAI during already about 25 years. This system consists of three instrumental containers uniformly placed along a vertical 6 km line. Up today this set has been used only for geomagnetic purposes. So we describe this system on example of the measuring of the geomagnetic field gradient. System allows measuring a module and vertical gradient of the geomagnetic field along the whole flight trajectory and so one’s name is - stratospheric balloon magnetic gradiometer (SMBG). The GPS-receivers, located in each instrumental container, fix the flight coordinates to within several tens meters. Process of SBMG deployment, feature of the exit of rope from the magazine at the moment of balloon launching has been studied. Used magazine is cellular type. The hodograph of the measuring base of SBMG and the technique of correction of the deviations of the measuring base from the vertical line (introduction of the amendments for the deviation) during the flight have been investigated. It is shown that estimation of the normal level of values of the vertical gradient of the geomagnetic field is determined by the accuracy of determining the length of the measuring base SBMG

  19. Mars Solar Balloon Lander Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The Mars Solar Balloon Lander (MSBL) is a novel concept which utilizes the capability of solar-heated hot air balloons to perform soft landings of scientific...

  20. Venus Altitude Cycling Balloon Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The ISTAR Group ( IG) and team mate Thin Red Line Aerospace (TRLA) propose a Venus altitude cycling balloon (Venus ACB), an innovative superpressure balloon...

  1. Therapeutic balloon-assisted enteroscopy

    NARCIS (Netherlands)

    H. Aktas (Huseyin); P.B.F. Mensink (Peter)

    2009-01-01

    textabstractSince the introduction of the first balloon-based enteroscopic technique in 2001, therapeutic balloon-assisted enteroscopy (BAE) using either the single or double balloon enteroscopy technique (respectively SBE and DBE) has evolved rapidly. Argon plasma coagulation (APC), polypectomy,

  2. Cutting balloon and high-pressure balloon dilation for palliative treatment of congenital double-chambered right ventricle and primary infundibular stenosis in a Golden retriever dog.

    Science.gov (United States)

    Schober, Karsten E; Rhinehart, Jaylyn; Kohnken, Rebecca; Bonagura, John D

    2017-12-01

    Combined cutting balloon and high-pressure balloon dilation was performed in a dog with a double-chambered right ventricle and severe infundibular stenosis of the right ventricular outflow tract. The peak systolic pressure gradient across the stenosis decreased by 65% after dilation (from 187 mmHg before to 66 mmHg after) affirming the intervention as successful. However, early re-stenosis occurred within 3 months leading to exercise intolerance, exercise-induced syncope, and right-sided congestive heart failure. Cutting balloon followed by high-pressure balloon dilation provided temporary but not long-term relief of right ventricular obstruction in this dog. Copyright © 2017 Elsevier B.V. All rights reserved.

  3. Laser Recanalization of Central Venous Occlusion to Salvage a Threated Arteriovenous Fistula.

    Science.gov (United States)

    Rambhia, Sagar; Janko, Matthew; Hacker, Robert I

    2018-02-15

    Central venous occlusion is conventionally managed with balloon angioplasty, stent extension or sharp recanalization. Here we describe recanalization of a chronically occluded innominate vein using excimer laser after conventional techniques were unsuccessful. Patient clinical improvement and fistula patency have been sustained two years post-intervention. This technique may provide new hemodialysis access options for patients who would not otherwise be candidates for hemodialysis access on the ipsilateral side of a central venous occlusion. Copyright © 2018 Elsevier Inc. All rights reserved.

  4. Complex Coronary Interventions with the Novel Mozec™ CTO Balloon: The MOZART Registry.

    Science.gov (United States)

    Lupi, Alessandro; Rognoni, Andrea; Schaffer, Alon; Secco, Gioel G; Bongo, Angelo S

    2015-01-01

    Mozec™ CTO is a novel semicompliant rapid-exchange PTCA balloon catheter with specific features dedicated to treat complex coronary lesions like chronic total occlusions (CTOs). However, no data have been reported about the performance of this device in an all-comers population with complex coronary lesions. We evaluated the safety and success rate of Mozec™ CTO balloon in 41 consecutive patients with chronic stable angina and complex coronary lesions (15 severe calcified coronary stenoses, 15 bifurcation lesions with planned two-stent intervention, and 11 CTOs). Safety was assessed reporting the balloon burst rate after inflation exceeding the rated burst pressure (RBP) according to the manufacturer's reference table. Success was defined as the possibility to advance the device further the target lesion. The Mozec™ CTO balloon showed an excellent performance with a 93.3% success in crossing tight and severely calcified lesions (14/15 pts), a 93.3% success in engaging jailed side branches after stent deployment across bifurcations (14/15 pts), and a 90.9% success in crossing CTO lesions (10/11 pts). The burst rate at RBP of the Mozec™ CTO balloon was 6.7% (1/15 balloons) in the tight and severely calcified lesions, 6.7% (1/15 balloons) when dilating jailed vessels, and 9.1% (1/11 balloons) in CTOs. The novel Mozec™ CTO balloon dilatation catheter showed promising results when employed to treat complex lesions in an all-comers population. Further studies should clarify if this kind of balloon might reduce the need of more costly devices like over-the-wire balloons and microcatheters for complex lesions treatment.

  5. Collagen plug occlusion of Molteno tube shunts.

    Science.gov (United States)

    Stewart, W; Feldman, R M; Gross, R L

    1993-01-01

    We report five patients in whom collagen lacrimal plugs were used to temporarily occlude the lumen of Molteno shunts to prevent early postoperative hypotony. Only one eye, with a double plate, developed hypotony and a flat anterior chamber that required reformation. However, in three patients, the collagen plugs did not dissolve and had to be removed surgically to lower the intraocular pressure. Although the semipermeability of collagen is desirable, its unpredictable degradation renders it unsuitable for temporary occlusion of tube shunts. Other biodegradable materials may be more appropriate for this purpose.

  6. Onyx HD-500 embolization of intracranial aneurysms: modified technique using continuous balloon inflation under conscious sedation.

    Science.gov (United States)

    Rahme, Ralph; Grande, Andrew; Jimenez, Lincoln; Abruzzo, Todd A; Ringer, Andrew J

    2014-08-01

    The conventional technique of intracranial aneurysm embolization using Onyx HD-500 (ev3 Neurovascular, Irvine, CA, USA) involves repetitive balloon inflation-deflation cycles under general anesthesia. By limiting parent artery occlusion to 5 minutes, this cyclic technique is thought to minimize cerebral ischemia. However, intermittent balloon deflation may lengthen procedure time and allow balloon migration, resulting in intimal injury or Onyx leakage. We report our experience using a modified technique of uninterrupted Onyx injection with continuous balloon occlusion under conscious sedation. All Onyx embolization procedures for unruptured aneurysms performed by the senior author (A.J.R.) between September 2008 and April 2010 were retrospectively reviewed. Demographic, clinical, angiographic, and procedural data were recorded. Twenty-four embolization procedures were performed in 21 patients with 23 aneurysms, including four recurrences. Twenty aneurysms (87%) involved the paraclinoid or proximal supraclinoid internal carotid artery. Size ranged from 2.5 to 24mm and neck diameter from 2 to 8mm. The modified technique was employed in 19 cases. All but one patient (94.4%) tolerated continuous balloon inflation. Complete occlusion was achieved in 20 aneurysms (83.3%) and subtotal occlusion in three (12.5%). Stable angiographic results were seen in 85%, 94%, 94%, and 100% of patients at 6, 12, 24, and 36months, respectively. There were no deaths. Permanent non-disabling neurological morbidity occurred in one patient (4.2%). Minor, transient, and/or angiographic complications were seen in three patients (12.5%), none related to the technique itself. Onyx embolization of unruptured intracranial aneurysms can be safely and effectively performed using continuous balloon inflation under conscious sedation. Copyright © 2014 Elsevier Ltd. All rights reserved.

  7. Obesity and gastric balloon

    Directory of Open Access Journals (Sweden)

    Mohammed I Yasawy

    2014-01-01

    Full Text Available Background: The obesity epidemic, which is among the most common nutritional disorders, is rising rapidly worldwide. It leads to several health problems such as metabolic disorders, stroke, and even cancer. Efforts to control obesity with exercise and diet have a limited value in obese patients and different approaches to do this have been tried. In this paper, we share our experience with bioenteric intragastric balloon (BIB in treating obesity: Its safety, tolerability, and its efficacy in weight reduction. Materials and Methods: From January 2009 to September 2012, a total of 190 gastric balloons was inserted on patients at the endoscopy unit in King Fahd Hospital of the University, Al-Khobar. This is an evaluation of the first 100 patients. All the patients had a body mass index of over 30 kg/m 2 and were within the age range of 17-55 with a mean age of 32 years. After consent, preballoon investigation tests and anesthesia evaluation, BIB was inserted under monitored anesthesia care sedation in the endoscopy suite. The balloon was filled with 500-700 mls of stained saline. All patients′ were given an analgesic and antiemetic for a week and antisecretory proton pump inhibitor′s for 6 months. Diet and the importance of the exercise were part of the preballoon insertion phase and protocol. The balloon was removed after 6-12 months. Results: The weight loss response to BIB in the 100 patients are classified into four groups: In the uncooperative, noncompliant patients - the maximum weight loss was 7 kg, while in the most compliant patients the weight loss reached up to 39 kg. In addition, there was significant improvement into diabetes mellitus, hypertension, dyslipidemia, and fatty liveras. Its safety and tolerability were extremely acceptable. Conclusion: Our data indicates that in well-selected patients, BIB is an effective device, which with minimum complications helps to achieve body weight loss and resolve many obesity related

  8. Hydrogel based occlusion systems

    NARCIS (Netherlands)

    Stam, F.A.; Jackson, N.; Dubruel, P.; Adesanya, K.; Embrechts, A.; Mendes, E.; Neves, H.P.; Herijgers, P.; Verbrugghe, Y.; Shacham, Y.; Engel, L.; Krylov, V.

    2013-01-01

    A hydrogel based occlusion system, a method for occluding vessels, appendages or aneurysms, and a method for hydrogel synthesis are disclosed. The hydrogel based occlusion system includes a hydrogel having a shrunken and a swollen state and a delivery tool configured to deliver the hydrogel to a

  9. Occlusion effects, Part I

    DEFF Research Database (Denmark)

    Hansen, Mie Østergaard

    annoyances and the objective measurements were analysed. Persons suffering from tinnitus behaved differently than person without tinnitus. The latter group showed significant relations between the measured occlusion effect, hearing loss and the personal of occlusion. The actual sensation level is also...

  10. Pregnancy after tubal occlusion

    African Journals Online (AJOL)

    SA MEDIESE TYDSKRIF DEEL 63 2 APRIL 1983. 517. Pregnancy after tubal occlusion. A 5-year study. K. D. GUNSTON, H. A. VAN COEVERDEN DE GROOT, M. R. BROMHALL. Pregnancy after laparoscopy. The various methods oflaparoscopic tubal occlusion employed and the pregnancy rates are listed in Table I.

  11. Optimum designs for superpressure balloons

    Science.gov (United States)

    Smith, M. S.; Rainwater, E. L.

    2004-01-01

    The elastica shape is now well known to be the best basic shape for superpressure balloon design. This shape, also known as the pumpkin, or natural shape for balloons, has been well understood since the early 1900s when it was applied to the determination of the shape of descending parachutes. The elastica shape was also investigated in the 1950s when high strength films were used to produce superpressure cylinder balloons. The need for uniform stress distribution in shells of early superpressure balloons led to a long period of the development of spherical superpressure balloons. Not until the late 1970s was the elastica shape revisited for the purpose of the producing superpressure balloons. This paper will review various development efforts in the field of superpressure design and will elaborate on the current state-of-the-art with suggestions for future developments.

  12. Free boundary ballooning mode representation

    Science.gov (United States)

    Zheng, Linjin

    2012-03-01

    Considerable efforts have been made in this field to develop a free boundary ballooning mode representation, which can incorporate the peeling mode stability criterion. Those efforts have not succeeded, simply because the so-called ballooning mode invariance is broken toward plasma edge. This makes 1D description of high n modes at plasma edge become impossible, where n is toroidal mode number. Nevertheless, we prove that the existence of ``half" ballooning mode invariance toward plasma core enables an 1.δ-dimentional representation of the modes, where δ˜O(1/n). This considerably reduces the complicity in investigating high n modes at plasma edge and can be used to study peeling-ballooning modes. This technique can also be useful to extend the 1D calculation of fixed boundary ballooning modes for free boundary ballooning modes. Numerical example will also be presented together with the topological symmetry analysis.

  13. Breakthrough in Mars balloon technology

    Science.gov (United States)

    Kerzhanovich, V. V.; Cutts, J. A.; Cooper, H. W.; Hall, J. L.; McDonald, B. A.; Pauken, M. T.; White, C. V.; Yavrouian, A. H.; Castano, A.; Cathey, H. M.; Fairbrother, D. A.; Smith, I. S.; Shreves, C. M.; Lachenmeier, T.; Rainwater, E.; Smith, M.

    2004-01-01

    Two prototypes of Mars superpressure balloons were flight tested for aerial deployment and inflation in the Earth's stratosphere in June, 2002. One was an 11.3 m diameter by 6.8 m high pumpkin balloon constructed from polyethylene film and Zylon (PBO) tendons, the second was a 10 m diameter spherical balloon constructed from 12 μm thick Mylar film. Aerial deployment and inflation occurred under parachute descent at 34 km altitude, mimicing the dynamic pressure environment expected during an actual Mars balloon mission. Two on-board video cameras were used on each flight to provide real-time upward and downward views of the flight train. Atmospheric pressure and temperature were also recorded. Both prototypes successfully deployed from their storage container during parachute descent at approximately 40 m/s. The pumpkin balloon also successfully inflated with a 440 g charge of helium gas injected over a 1.5-min period. Since the helium inflation system was deliberately retained after inflation in this test, the pumpkin balloon continued to fall to the ocean where it was recovered for post-flight analysis. The less robust spherical balloon achieved only a partial (~70%) inflation before a structural failure occurred in the balloon film resulting in the loss of the vehicle. This structural failure was diagnosed to result from the vigorous oscillatory motion of the partially inflated balloon, possibly compounded by contact between the balloon film and an instrumentation box above it on the flight train. These two flights together represent significant progress in the development of Mars superpressure balloon technology and pave the way for future flight tests that will include post-deployment flight of the prototype balloons at a stable altitude.

  14. Titan Balloon Convection Model Project

    Data.gov (United States)

    National Aeronautics and Space Administration — This innovative research effort is directed at determining, quantitatively, the convective heat transfer coefficients applicable to a Montgolfiere balloon operating...

  15. Life-saving effects of fetal tracheal occlusion on pulmonary hypoplasia from preterm premature rupture of membranes.

    Science.gov (United States)

    Kohl, Thomas; Geipel, Annegret; Tchatcheva, Kristina; Stressig, Rüdiger; Willinek, Winfried A; Gembruch, Ulrich; Müller, Andreas

    2009-02-01

    Preterm premature rupture of membranes before 22 weeks of gestation may result in severe fetal pulmonary hypoplasia. Fetoscopic tracheal balloon occlusion might result in catch-up pulmonary growth. After preterm premature rupture of membranes at 16 weeks of gestation, magnetic resonance imaging at 26 0/7 weeks showed a fetal lung volume of 13 mL and pulmonary blood flow hardly could be detected. Fetoscopic tracheal balloon occlusion was performed at 27 6/7 weeks; within 6 days, fetal lung volume increased to 70 mL and lung blood flow normalized. The fetus was delivered electively at 28 6/7 weeks. Six hours after delivery, the neonate required only 21% oxygen and was extubated after 55 hours. Short-term fetoscopic tracheal balloon occlusion may result in rapid normalization of fetal lung volume and blood flow in fetuses with life-threatening pulmonary hypoplasia from preterm premature rupture of membranes before 22 weeks of gestation.

  16. Follicular occlusion tetrad

    Directory of Open Access Journals (Sweden)

    Vani Vasanth

    2014-01-01

    Full Text Available Follicular occlusion tetrad is a symptom complex consisting of four conditions having a similar pathophysiology. It includes Hidradenitis suppurativa, acne conglobata, dissecting cellulitis of the scalp and pilonidal sinus. The exact pathogenesis of this group of disease is unknown but evidence suggests that they share the same pathological process initiated by follicular occlusion in apocrine gland bearing areas. Though each of these conditions is commonly encountered singly, follicular occlusion tetrad as a symptom complex has been rarely reported in the literature.

  17. Efficacy of Endovascular Therapy for Direct Occlusion of Intracranial Aneurysms

    Directory of Open Access Journals (Sweden)

    K Tamrakar

    2011-09-01

    Full Text Available Introduction: Our purpose was to evaluate the effectiveness of endovascular therapy using detachable coils and balloons for the direct occlusion of intracranial aneurysms. Methods: We retrospectively reviewed 563 patients undergoing digital subtraction angiography from January 2007 to July 2009. Two hundred and fi fty patients with 323 embolized intracranial aneurysms were studied. Results: Among 250 patients, 66 % were female and 34 % male, the age ranging from 19 - 83 years (mean 50.66 ± 12.92. One hundred and seventy-seven had a single aneurysm while 73 showed multiple aneurysms. Seventeen (9.6 % had giant aneurysms. Three hundred and eleven aneurysms were treated using detachable coils, and 12 giant aneurysms were embolized by detachable balloons for the parent vessel occlusion. Of 323 aneurysms treated via the endovascular approach, total occlusion was seen in 93 % of the aneurysms, near total occlusion in 5.2 % and incomplete embolization in 1.5 %. Among patients presenting with sub-arachnoid hemorrhage, 62 improved to the Glasgow outcome score (GOS of 5, 93 improved to GOS 4, 14 improved to GOS 3, 10 improved to GOS 2 at the time of discharge and 5 patients died. Angiographic follow-up was scheduled between 6 - 12 months post-embolization. The aneurysm recurred in 1.2 % and were re-embolized using additional coils. Statistically, Hunt and Hess Grade and GOS indicated clinical signifi cance (P 0.05. Conclusions: Hunt and Hess VI and V are considered as poor clinical gradings in aneurysmal SAH. However, endovascular treatment has been established as an effective method to obliterate intracranial aneurysms allowing subsequent decrease in mortality and morbidity. Keywords: detachable coils, detachable balloons, endovascular therapy, intracranial aneurysms.

  18. Aerodynamics of a Party Balloon

    Science.gov (United States)

    Cross, Rod

    2007-01-01

    It is well-known that a party balloon can be made to fly erratically across a room, but it can also be used for quantitative measurements of other aspects of aerodynamics. Since a balloon is light and has a large surface area, even relatively weak aerodynamic forces can be readily demonstrated or measured in the classroom. Accurate measurements…

  19. Free boundary ballooning mode representation

    Science.gov (United States)

    Zheng, L. J.

    2012-10-01

    A new type of ballooning mode invariance is found in this paper. Application of this invariance is shown to be able to reduce the two-dimensional problem of free boundary high n modes, such as the peeling-ballooning modes, to a one-dimensional problem. Here, n is toroidal mode number. In contrast to the conventional ballooning representation, which requires the translational invariance of the Fourier components of the perturbations, the new invariance reflects that the independent solutions of the high n mode equations are translationally invariant from one radial interval surrounding a single singular surface to the other intervals. The conventional ballooning mode invariance breaks down at the vicinity of plasma edge, since the Fourier components with rational surfaces in vacuum region are completely different from those with rational surfaces in plasma region. But, the new type of invariance remains valid. This overcomes the limitation of the conventional ballooning mode representation for studying free boundary modes.

  20. Balloon-based adjuvant radiotherapy in breast cancer: comparison between (99m)Tc and HDR (192)Ir.

    Science.gov (United States)

    de Campos, Tarcísio Passos Ribeiro; de Lima, Carla Flavia; Cuperschmid, Ethel Mizrahy

    2016-01-01

    To perform a comparative dosimetric analysis, based on computer simulations, of temporary balloon implants with (99m)Tc and balloon brachytherapy with high-dose-rate (HDR) (192)Ir, as boosts to radiotherapy. We hypothesized that the two techniques would produce equivalent doses under pre-established conditions of activity and exposure time. Simulations of implants with (99m)Tc-filled and HDR (192)Ir-filled balloons were performed with the Siscodes/MCNP5, modeling in voxels a magnetic resonance imaging set related to a young female. Spatial dose rate distributions were determined. In the dosimetric analysis of the protocols, the exposure time and the level of activity required were specified. The (99m)Tc balloon presented a weighted dose rate in the tumor bed of 0.428 cGy.h(-1).mCi(-1) and 0.190 cGyh(-1).mCi(-1) at the balloon surface and at 8-10 mm from the surface, respectively, compared with 0.499 and 0.150 cGyh(-1).mCi(-1), respectively, for the HDR (192)Ir balloon. An exposure time of 24 hours was required for the (99m)Tc balloon to produce a boost of 10.14 Gy with 1.0 Ci, whereas only 24 minutes with 10.0 Ci segments were required for the HDR (192)Ir balloon to produce a boost of 5.14 Gy at the same reference point, or 10.28 Gy in two 24-minutes fractions. Temporary (99m)Tc balloon implantation is an attractive option for adjuvant radiotherapy in breast cancer, because of its availability, economic viability, and similar dosimetry in comparison with the use of HDR (192)Ir balloon implantation, which is the current standard in clinical practice.

  1. Balloon-based adjuvant radiotherapy in breast cancer: comparison between {sup 99m}Tc and HDR {sup 192}Ir

    Energy Technology Data Exchange (ETDEWEB)

    Campos, Tarcisio Passos Ribeiro de; Lima, Carla Flavia de; Cuperschmid, Ethel Mizrahy, E-mail: tprcampos@pq.cnpq.br [Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG (Brazil)

    2016-03-15

    Objective: To perform a comparative dosimetric analysis, based on computer simulations, of temporary balloon implants with {sup 99m}Tc and balloon brachytherapy with high-dose-rate (HDR) {sup 192}Ir, as boosts to radiotherapy. We hypothesized that the two techniques would produce equivalent doses under pre-established conditions of activity and exposure time. Materials and methods: simulations of implants with {sup 99m}Tc-filled and HDR {sup 192}Ir-filled balloons were performed with the Siscodes/MCNP5, modeling in voxels a magnetic resonance imaging set related to a young female. Spatial dose rate distributions were determined. In the dosimetric analysis of the protocols, the exposure time and the level of activity required were specified. Results: the {sup 99m}Tc balloon presented a weighted dose rate in the tumor bed of 0.428 cGy.h{sup -1}.mCi{sup -1} and 0.190 cGyh{sup -1} at the balloon surface and at 8-10 mm from the surface, respectively, compared with 0.499 and 0.150 cGyh{sup -1}.mCi{sup -1}, respectively, for the HDR {sup 192}Ir balloon. An exposure time of 24 hours was required for the {sup 99m}Tc balloon to produce a boost of 10.14 Gy with 1.0 Ci, whereas only 24 minutes with 10.0 Ci segments were required for the HDR {sup 192}Ir balloon to produce a boost of 5.14 Gy at the same reference point, or 10.28 Gy in two 24-minutes fractions. Conclusion: temporary {sup 99m}Tc balloon implantation is an attractive option for adjuvant radiotherapy in breast cancer, because of its availability, economic viability, and similar dosimetry in comparison with the use of HDR {sup 192}Ir balloon implantation, which is the current standard in clinical practice. (author)

  2. Occlusion effects, Part II

    DEFF Research Database (Denmark)

    Hansen, Mie Østergaard

    The present report studies the mechanism of the occlusion effect by means of literature studies, experiments and model estimates. A mathematical model of the occlusion effect is developed. The model includes the mechanical properties of the earmould and the airborne sound as well as the body...... conducted sound from own voice. These aspects are new in the sense that previous studies disregard the earmould mechanics and includes only one sound source placed in the ear canal....

  3. The Temporary Leave Dilemma -

    DEFF Research Database (Denmark)

    Amilon, Anna

    2010-01-01

    Lone mothers have to take care of a sick child with little or no help from the child’s other parent and have to carry all costs connected to leave-taking. This paper empirically tests whether lone mothers take more temporary parental leave to care for sick children than partnered mothers...... and whether parental leave is associated with a signaling cost. The results from this study of Swedish mothers show that lone mothers use more temporary parental leave than partnered mothers. Further, within the group of lone mothers, those with higher socioeconomic status take less temporary parental leave...... than those with lower socioeconomic status, whereas no such differences are found within the group of partnered mothers. One possible interpretation is that signaling costs negatively influence the utilization of temporary parental leave for lone mothers....

  4. Temporary internal pacing.

    Science.gov (United States)

    Ortiz Díaz-Miguel, R; Gómez Grande, M L

    2014-12-01

    Technology and insertion techniques for cardiac temporary internal pacing have experienced a remarkable development over the last few years. Despite this fact, the procedure continues to have potentially fatal associated complications. Temporary internal pacing is indicated for the treatment of bradyarrhythmias or tachyarrhythmias refractory to conventional treatment, or arrhythmias causing cardiovascular or clinical instability of the patient. On the other hand, the indications of temporary cardiac pacing are far less well defined than those of permanent pacing. Since the decision of implementing temporary pacing is complex and delicate, it should always be carefully considered, and over-indication should be avoided. We must base these decisions on robust knowledge of the arrhythmias that may benefit from temporary internal pacing, and should also acquire the habit of considering external temporary pacing among other less aggressive treatments, and to make the best use of new technologies such as echocardiography that add accuracy to the procedure. Copyright © 2013 Elsevier España, S.L.U. y SEMICYUC. All rights reserved.

  5. Air Force Cambridge Research Laboratories balloon operations

    Science.gov (United States)

    Danaher, T. J.

    1974-01-01

    The establishment and functions of the AFCRL balloon operations facility are discussed. The types of research work conducted by the facility are defined. The facilities which support the balloon programs are described. The free balloon and tethered balloon capabilities are analyzed.

  6. Balloon-assisted coil embolization of the celiac trunk before endovascular aortic repair of thoracoabdominal aortic aneurysm.

    Science.gov (United States)

    Endo, Masayuki; Kaminou, Toshio; Ohuchi, Yasufumi; Sugiura, Kimihiko; Yata, Shinsaku; Adachi, Akira; Kawai, Tsuyoshi; Takasugi, Syohei; Yamamoto, Shuichi; Matsumoto, Kensuke; Hashimoto, Masayuki; Ihaya, Takashi; Ogawa, Toshihide

    2013-03-01

    Celiac trunk coil embolization before thoracic endovascular aneurysm repair (TEVAR) of a thoracoabdominal aortic aneurysm involving the celiac trunk can prevent type II endoleaks. One disadvantage of conventional coil embolization is the risk of coil displacement. We performed coil embolization under balloon occlusion of the celiac trunk to address this issue. Between December 2008 and January 2011, 5 patients (3 men and 2 women, mean age 76 years) were included in this study. For all patients, after confirming the collateral blood flow from the superior mesenteric artery via the pancreaticoduodenal arcades by using the balloon occlusion test, celiac trunk coil embolization proceeded under balloon occlusion of the proximal part of the celiac trunk. Balloon-assisted coil embolization of the celiac trunk was completed for all patients without any complications. All coils were deployed as planned in the short segment of the celiac trunk without displacement. Coil migration, ischemic complications, and endoleaks via the celiac trunk did not arise in any of the patients over a follow-up period of 77-637 (mean 258) days. Balloon-assisted coil embolization of the celiac trunk before TEVAR could be a feasible treatment option for suitable patients.

  7. Temporary labour contracts

    CERN Document Server

    1999-01-01

    The five contracts for Temporary Labour assignments on the CERN site (L020/PE, L021/PE, L022/PE, L023/PE and L024/PE) approved by the Finance Committee in March 1996 (CERN/FC/3857) will reach the end of their initial three-year contractual period at the end of December 1999. Following the satisfactory execution of these contracts during this period, CERN requests approval to extend them from January 2000 for the first of the two years foreseen in the original adjudication. The Finance Committee is invited: - to take note that the three-year expenditure for Temporary Labour contracts from 1997 to 1999 will not exceed 19 100 000 Swiss francs, compared to the 18 900 000 Swiss francs estimated at the time of the adjudication in March 1996; - to approve an extension of the present Temporary Labour contracts for the year 2000 for a total amount not exceeding 6 000 000 Swiss francs.

  8. US Daily Pilot Balloon Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Pilot Balloon observational forms for the United States. Taken by Weather Bureau and U.S. Army observers. Period of record 1918-1960. Records scanned from the NCDC...

  9. US Monthly Pilot Balloon Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Monthly winds aloft summary forms summarizing Pilot Balloon observational data for the United States. Generally labeled as Form 1114, and then transitioning to Form...

  10. US Air Force Balloon Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Worksheets containing pilot balloon data computed from releases at Air Force stations in the western United States. Elevation and azimuth angles are used to compute...

  11. Superpressure Tow Balloon for Extending Durations and Modifying Trajectories of High Altitude Balloon Systems Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The proposed innovation involves the concept of using a Superpressure Tow Balloon (STB) with existing NASA high altitude balloon designs to form a tandem balloon...

  12. First report of a life-threatening cardiac complication after percutaneous balloon kyphoplasty.

    Science.gov (United States)

    Tran, Ina; Gerckens, Ulrich; Remig, Jürgen; Zintl, Guido; Textor, Jochen

    2013-03-01

    We report the first case of life-threatening cardiac tamponade after percutaneous balloon kyphoplasty and its treatment with pericardiac drainage and percutaneous retrieval of cement embolus. To sensitize clinicians to the occurrence of perforation on the right side of the heart, with intracavity cement leakage as a potential complication after balloon kyphoplasty. Balloon kyphoplasty is a minimal invasive technique for symptomatic vertebral fractures. Cement leakage after kyphoplasty is a rare complication compared with vertebroplasty. A 68-year-old female patient underwent balloon kyphoplasty after a recent third and fourth lumbar verlebral fracture was diagnosed. The day after balloon kyphoplasty, the patient complained of dyspnea and chest pain. Her hemodynamic status rapidly deteriorated. Acute occlusion of coronary vessels was excluded by coronary angiography. Pericardial tamponade was documented by echocardiography, and pericardial effusion was urgently drained. Computed tomographic scan revealed the presence of cement embolus inside the right ventricle due to right ventricle perforation during the kyphoplasty procedure. The cement embolus was successfully retrieved percutaneously with a snare catheter. Balloon kyphoplasty is a minimal invasive technique with low rate of complications. In case of postprocedural chest symptoms, it is mandatory to exclude right ventricle perforation, cardiac tamponade, and embolism into pulmonary vessels because of cement embolism. 5.

  13. Tracheomegaly: a complication of fetal endoscopic tracheal occlusion in the treatment of congenital diaphragmatic hernia

    Energy Technology Data Exchange (ETDEWEB)

    McHugh, Kieran; Afaq, Asim; Roebuck, Derek J. [Great Ormond Street Hospital for Children, Radiology Department, London (United Kingdom); Broderick, Nigel [Nottingham University Hospitals, Radiology Department, Nottingham (United Kingdom); Gabra, Hany O.; Elliott, Martin J. [Great Ormond Street Hospital for Children, Department of Cardiothoracic Surgery, London (United Kingdom)

    2010-05-15

    Fetal endoscopic tracheal occlusion (FETO) is a promising treatment for severe congenital diaphragmatic hernia, a condition that carries significant morbidity and mortality. It is hypothesised that balloon occlusion of the fetal trachea leads to an improvement in lung growth and development. The major documented complications of FETO to date are related to preterm delivery. To report a series of five infants who developed tracheomegaly following FETO. Review of all children referred with tracheomegaly to the paediatric intensive care and tracheal service at two referral centres. Five neonates presented with features of respiratory distress shortly after birth and were subsequently found to have marked tracheomegaly. Two neonates had tracheomalacia in addition. There are no previous reports in the literature describing tracheomalacia, or more specifically, tracheomegaly, as a consequence of FETO. We propose that the particularly compliant fetal airway is at risk of mechanical damage from in utero balloon occlusion. This observation of a new problem in this cohort suggests a thorough evaluation of the trachea should be performed in children who have had FETO in utero. It may be that balloon occlusion of the trachea earlier in utero (before 26 weeks' gestation) predisposes to this condition. (orig.)

  14. Pregnancy after tubal occlusion

    African Journals Online (AJOL)

    1983-04-02

    Apr 2, 1983 ... the procedure and 2 mistakenly thought that they had been sterilized - one at the time of a salpingectomy for ectopic pregnancy and the other at a repeat caesarean section. The pregnancy rate was therefore 24 out of 9430 procedures, or. 2,5/1000. Repeat tubal occlusion has been performed in 10 of the 16.

  15. Follicular occlusion triad

    Directory of Open Access Journals (Sweden)

    Mittal R

    1993-01-01

    Full Text Available One 40-year female was diagnosed as a case of follicular occlusion triad (FOT as she had hidradenitis suppurativa, acne conglobata and perifolliculitis capitis abscedens et suffodiens since 7 years. Partial improvement occurred within 20 days of treatment with co-trimoxazole and haematinics but relapse occurred after 5 days of stopping antibiotics.

  16. Voxel-Space Ambient Occlusion

    Science.gov (United States)

    2012-02-01

    REPORT Voxel-Space Ambient Occlusion 14. ABSTRACT 16. SECURITY CLASSIFICATION OF: Ambient occlusion adds important detail to a scene. This paper...presents a multiresolution screen-space voxel based ambient occlusion technique, which improves G-buffer based techniques, avoiding artifacts such as haloing...Research Office P.O. Box 12211 Research Triangle Park, NC 27709-2211 15. SUBJECT TERMS Voxels, ambient occlusion, interactive visibility Rajeev

  17. Fluoroscopic Targeting of Wallstents and Amplatzer Vascular Plugs in Sharp Recanalization of Chronic Venous Occlusions.

    Science.gov (United States)

    Khaja, Minhaj S; Chick, Jeffrey Forris Beecham; Schuman, Ari D; Cooper, Kyle J; Majdalany, Bill S; Saad, Wael E; Williams, David M

    2017-11-01

    Sharp recanalization of chronic venous occlusions is usually performed with targeting of wire-capture devices like loop snares or balloons. We describe sharp recanalization of chronic venous occlusions using self-expanding stents and vascular plugs. We retrospectively reviewed all sharp venous recanalization procedures performed over an 11-month period and found Wallstent and Amplatzer vascular plug (AVP) targeting was performed in 16 patients. Patient demographics, occlusion site, targeting device, technical success of the targeting, and overall procedural success were recorded. Technical success was achieved in twelve (86%) Wallstent and two (67%) AVP deployments. Procedural success was achieved in 15 (94%). Three minor complications occurred. Wallstent and AVP targeting may be a useful technique when performing sharp recanalization for chronic venous occlusions. These devices expand the target space and present the same cross section viewed from any angle and can directly capture and extract the wire, features helpful in regions with crowded vascular anatomy.

  18. Sensor System for Super-Pressure Balloon Performance Modeling Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Long-duration balloon flights are an exciting new area of scientific ballooning, enabled by the development of large super-pressure balloons. As these balloons...

  19. Percutaneous endoscopic gastrostomy tube occlusion in malignant peritoneal carcinomatosis-induced bowel obstruction.

    Science.gov (United States)

    Vashi, Pankaj G; Dahlk, Sadie; Vashi, Rohan P; Gupta, Digant

    2011-11-01

    Percutaneous endoscopic gastrostomy (PEG) tube placement for decompression in advanced peritoneal carcinomatosis with bowel obstruction is a safe and feasible palliative procedure. We describe a rare, previously unreported phenomenon of PEG tube occlusion by gastric mucosal herniation. A consecutive case series of 73 patients with advanced abdominal carcinomatosis-induced bowel obstruction from January 2007 to June 2010. All patients had a 28 Fr (Bard) PEG tube placed for drainage. None of them were surgical candidates due to extensive peritoneal involvement. Patients with PEG tube occlusion as a result of gastric mucosal herniation were further evaluated. Nineteen patients were men and 54 were women. The mean age was 53.3 years. The most common cancer types were ovary, pancreas, colon, and stomach. All patients had PEG tube functioning well after the procedure with immediate relief of obstructive symptoms. Subsequently, 10 patients developed acute occlusion of PEG tubes with reoccurrence of obstructive symptoms. The time between the placement of the PEG tube and its occlusion ranged from 5 to 129 days. Repeat endoscopy showed the PEG tube occluded with gastric mucosa from the opposite wall. PEG tube was replaced with a 28 Fr balloon replacement tube leading to symptom improvement in all 10 patients. This rare but correctable phenomenon of obliteration of PEG tube from the gastric mucosa should be considered in any patient who develops intermittent occlusive symptoms. This phenomenon can be corrected by replacing the PEG tube with a ballooned replacement tube as well as occasional manipulation of the tube.

  20. Acoustic Detection from Aerial Balloon Platform

    National Research Council Canada - National Science Library

    Reiff, C; Pham, T; Scanlon, M; Noble, J; Van Landuyt, A; Petek, J; Ratches, J

    2004-01-01

    ... such as unmanned aerial vehicles (UAVs) and balloons. Our most immediate collaboration focuses on the use of acoustic sensors on small balloons and/or aerostats at several elevations and on the ground with the primary goals...

  1. Balloons on planet Venus - Final results

    Science.gov (United States)

    Blamont, J.; Boloh, L.; Kerzhanovich, V.; Kogan, L.; Kurganskii, M.; Linkin, V.; Matveenko, L.; Roy, M.; Patsaev, D.; Pichkhadze, K.

    1993-01-01

    On June 11 and 15, 1985 two packages with balloons have been inserted in the atmosphere of Venus from the Soviet VEGA landing modules. This paper summarizes the pressure, temperature, wind illumination and backscattering data from the balloons.

  2. Left atrial appendage occlusion

    Directory of Open Access Journals (Sweden)

    Ahmad Mirdamadi

    2013-01-01

    Full Text Available Left atrial appendage (LAA occlusion is a treatment strategy to prevent blood clot formation in atrial appendage. Although, LAA occlusion usually was done by catheter-based techniques, especially percutaneous trans-luminal mitral commissurotomy (PTMC, it can be done during closed and open mitral valve commissurotomy (CMVC, OMVC and mitral valve replacement (MVR too. Nowadays, PTMC is performed as an optimal management of severe mitral stenosis (MS and many patients currently are treated by PTMC instead of previous surgical methods. One of the most important contraindications of PTMC is presence of clot in LAA. So, each patient who suffers of severe MS is evaluated by Trans-Esophageal Echocardiogram to rule out thrombus in LAA before PTMC. At open heart surgery, replacement of the mitral valve was performed for 49-year-old woman. Also, left atrial appendage occlusion was done during surgery. Immediately after surgery, echocardiography demonstrates an echo imitated the presence of a thrombus in left atrial appendage area, although there was not any evidence of thrombus in pre-pump TEE. We can conclude from this case report that when we suspect of thrombus of left atrial, we should obtain exact history of previous surgery of mitral valve to avoid misdiagnosis clotted LAA, instead of obliterated LAA. Consequently, it can prevent additional evaluations and treatments such as oral anticoagulation and exclusion or postponing surgeries including PTMC.

  3. Essays on temporary migration

    OpenAIRE

    Mestres Domenech, J.

    2012-01-01

    My thesis dissertation focuses on the temporariness of migration, its diverse effects as well as on migration selection. The first paper, A Dynamic Model of Return Migration analyzes the decision process underlying return migration using a dynamic model. We explain how migrants decide whether to stay or to go back to their home country together with their savings and consumption decisions. We simulate our model with return intentions and perform policy simulations. The se...

  4. Ballonnen in zee = balloons as marine litter

    NARCIS (Netherlands)

    Franeker, van J.A.

    2008-01-01

    Releasing balloons seems harmless. However, remains of balloons, especially valves and ribbons are becoming a common and persistent type of marine litter found on beaches. Following Dutch Queens day 2007, large numbers of Dutch balloons were found in Normandy, France. Animals may become entangled in

  5. Complications of balloon packing in epistaxis

    NARCIS (Netherlands)

    Vermeeren, Lenka; Derks, Wynia; Fokkens, Wytske; Menger, Dirk Jan|info:eu-repo/dai/nl/396566170

    2015-01-01

    Although balloon packing appears to be efficient to control epistaxis, severe local complications can occur. We describe four patients with local lesions after balloon packing. Prolonged balloon packing can cause damage to nasal mucosa, septum and alar skin (nasal mucosa, the cartilaginous skeleton

  6. Percutaneous transluminal laser angioplasty in patients with peripheral arterials occlusive disease

    Energy Technology Data Exchange (ETDEWEB)

    Richter, E.I.; Zeitler, E.; Klepzig, M.; Neubauer, T.; Strauer, B.E.

    1987-06-01

    The submitted article is a report of our first own results with the combined treatment system of a Neodym-Laser with a special application system and the balloon catheter dilatation technique in 6 patients. The results of follow-up control after 3 months were very positive in localized femoral stenoses and short femoral occlusions up to 2 cm. In long femoral obliterations there is the impression of an already beginning rethrombosis.

  7. Meteorological Support in Scientific Ballooning

    Science.gov (United States)

    Schwantes, Chris; Mullenax, Robert

    2017-01-01

    The weather affects every portion of a scientific balloon mission, from payload integration to launch, float, and impact and recovery. Forecasting for these missions is very specialized and unique in many aspects. CSBF Meteorology incorporates data from NWSNCEP, as well as several international meteorological organizations, and NCAR. This presentation will detail the tools used and specifics on how CSBF Meteorology produces its forecasts.

  8. Occlusion, TMDs, and dental education

    OpenAIRE

    Ash Major M

    2007-01-01

    Abstract The paradigmatic shift to evidence-based dentistry (EBD) that relates to occlusal therapy, selective occlusal adjustment (OA) and stabilization splints therapy (SS) for TMDs has had an unfavourable impact on the teaching of many of the important aspects of occlusion needed in dental practice. The teaching of OA systematically in dental schools has been nearly abandoned because of the belief that OA is an irreversible procedure and gives the impression that it is without merit elsewhe...

  9. A temporary face support

    Energy Technology Data Exchange (ETDEWEB)

    Popov, V.I.; Bakhtin, V.N.; Tolkachev, N.I.

    1980-03-30

    A temporary face support is proposed. It includes a beam supported by hydraulic jacks on the housing of the cutter-loader with a working tool and rotary pressure regulator. It differs in that to decrease the volume of unsecured roofing in the face space between the leading edge of the beam and the cutting tool of the cutter-loader, the beam is hinged onto the housing of the rotary pressure regulator by a fastened connecting rod, and the hydraulic jacks are provided with additional powered elements with a mechanism that regulates the length of the cut-off plate of the hydraulic pump when the seam pressure changes.

  10. Fetoscopic tracheal occlusion for severe congenital diaphragmatic hernia: retrospective study

    Directory of Open Access Journals (Sweden)

    Angélica de Fátima de Assunção Braga

    Full Text Available Abstract Background and objectives: The temporary fetal tracheal occlusion performed by fetoscopy accelerates lung development and reduces neonatal mortality. The aim of this paper is to present an anesthetic experience in pregnant women, whose fetuses have diaphragmatic hernia, undergoing fetoscopic tracheal occlusion (FETO. Method: Retrospective, descriptive study, approved by the Institutional Ethics Committee. Data were obtained from medical and anesthetic records. Results: FETO was performed in 28 pregnant women. Demographic characteristics: age 29.8 ± 6.5; weight 68.64 ± 12.26; ASA I and II. Obstetric: IG 26.1 ± 1.10 weeks (in FETO; 32.86 ± 1.58 (reversal of occlusion; 34.96 ± 2.78 (delivery. Delivery: cesarean section, vaginal delivery. Fetal data: Weight (g in the occlusion and delivery times, respectively (1045.82 ± 222.2 and 2294 ± 553; RPC in FETO and reversal of occlusion: 0.7 ± 0.15 and 1.32 ± 0.34, respectively. Preoperative maternal anesthesia included ranitidine and metoclopramide, nifedipine (VO and indomethacin (rectal. Preanesthetic medication with midazolam IV. Anesthetic techniques: combination of 0.5% hyperbaric bupivacaine (5-10 mg and sufentanil; continuous epidural predominantly with 0.5% bupivacaine associated with sufentanil, fentanyl, or morphine; general. In 8 cases, there was need to complement via catheter, with 5 submitted to PC and 3 to BC. Thirteen patients required intraoperative sedation; ephedrine was used in 15 patients. Fetal anesthesia: fentanyl 10-20 mg.kg-1 and pancuronium 0.1-0.2 mg.kg-1 (IM. Neonatal survival rate was 60.7%. Conclusion: FETO is a minimally invasive technique for severe congenital diaphragmatic hernia repair. Combined blockade associated with sedation and fetal anesthesia proved safe and effective for tracheal occlusion.

  11. Analyzing Physiologic occlusion

    Directory of Open Access Journals (Sweden)

    M. Emamie

    1987-08-01

    Full Text Available Generally speaking, when preserving and restoring the gnathostomatic system the dentist controls tooth morphology to insure proper distribution of stress. So, we restore a portion of a tooth or all the teeth in such a manner as to subject the associated parts of the system to the least stress. We evaluate our diagnosis and control it in our treatment. The treatment should be based on the scientific method. We create optimal occlusion or a desirable functional state of the masticatory system.  Many persons with occlusal imperfections will not have symptoms of functional disorders. This is the psychological adaptive capacity of the neuromuscular system, teeth, dental arches, and periodontal tissues.Recent developments in dental material, technology and instruments however, have simplified the taskaf restoring rebuilding and rehabilitating diseased mouths. So, optimum oral health and function should be the prime objective of all treatment procedures. Because the ultimate aim will always be to restore the mouth to health and preserve this status throughout the life of a patient.

  12. [Case report on occlusal reconstruction for partially edentulous arches for restoring teeth in bad condition].

    Science.gov (United States)

    Hisamatsu, Noriko

    2005-02-01

    A 45-year-old female presented with the chief complaint of masticatory disturbance and spontaneous pain at the mandibular left second molar. Her maxillary left first and second molars, and mandibular right first and second molars were missing and the edentulous arches had been left untreated for a long period. In this patient who lacked occlusal support, occlusal reconstruction was done using a temporary prosthesis. Prosthodontic treatment with minimum tooth extraction required several years. Taking aesthetics into consideration, the maxillary right lateral incisor was used as a support for a removable partial denture. The small perforation was sealed successfully with an adhesive resin (4-META/MMA-TBB resin) in order to restore the mandibular left first molar. The occlusal reconstruction for partially edentulous arches without occlusal support took several years. Informed consent and cooperation between patient and dentist were indispensable for the satisfactory results in this case.

  13. Removal of fractured balloon catheter using another balloon inflation in coronary artery: case report.

    Science.gov (United States)

    Soylu, Ahmet; Ozdemir, Kurtulus; Duzenli, M Akif

    2006-11-18

    In this report, a novel management to the problem of a fractured balloon catheter which is a very rarely seen complication and has not yet been reported in the nature as in our case during percutaneous transluminal coronary interventions is presented. We inserted a second balloon catheter to the space between the previous fractured balloon and the wall of right coronary artery, and then by inflating the second balloon catheter at low pressure, the guide-wire of fractured balloon catheter and the second sound balloon catheter gently and cautiously removed together into the guiding catheter. Subsequently, the whole system was taken out of the body without complication.

  14. Development of scientific ballooning in Japan

    Science.gov (United States)

    Nishimura, Jun

    On the occasion of the 50th Anniversary Celebration of COSPAR of this year of 2008, it is worthwhile to summarize the results of the Scientific ballooning in early days in connection with the recent developments in various countries. Nishina Laboratories, Riken, had started the observations of cosmic rays with rubber balloons as early as 1942. However it was interrupted soon by the war II. After the war, new research group started in collaboration with several universities with nuclear emulsions put on the rubber balloons in 1950, and then soon after the group manufactured by themselves and launched the first plastic balloon in 1953. Based on additional technologies during a few years developed by these group, the Institute of Nuclear Study, INS, the University of Tokyo, organized the large campaign of 14 emulsion chambers and a pellicle stack with 8 plastic balloons in 1956. It is to be noted that the project was one of the largest in the world standard in those days. By the experience of this campaign, the importance of the balloon technologies was more recognized, and INS organized the group to study the balloon technologies, and had established some developments. The systematic study of scientific ballooning has started, when the scientific ballooning laboratory was founded in 1965, in the new Institute of ISAS, the University of Tokyo. The permanent balloon base of "Sanriku Balloon Center" was founded in 1971. This group has expended all efforts for the scientific ballooning, launching 10-20 balloons in each year with new inventions such as the studies of; Technologies to manufacture the reliable plastic balloons, New Balloon materials, New instrumentations for scientific ballooning, Systems of long duration flights including Antarctica flights, International collaboratiom, etc. Up to now almost 600 plastic balloons were launched during past 50 years. Then the scientific balloonings have played important and indispensable roles for the development of space

  15. Occlusion, TMDs, and dental education.

    Science.gov (United States)

    Ash, Major M

    2007-01-03

    The paradigmatic shift to evidence-based dentistry (EBD) that relates to occlusal therapy, selective occlusal adjustment (OA) and stabilization splints therapy (SS) for TMDs has had an unfavourable impact on the teaching of many of the important aspects of occlusion needed in dental practice. The teaching of OA systematically in dental schools has been nearly abandoned because of the belief that OA is an irreversible procedure and gives the impression that it is without merit elsewhere in the management of occlusion. However, a particular dose of knowledge and practice of occlusion that is necessary for all aspects of dental care should be taught systematically in dental schools. The uses and misuses of OA and SS and their limitations should be emphasized because of their importance to bring clinical reality into the dental curriculum. Thus, and irrespective of EBD induced contradictions, OA and SS should still have a significant place in systematically teaching of occlusal therapy. However, there are many more aspects of the management of occlusion that should to be considered. Hopefully, because of their importance, other aspects of the management of occlusion will once again become a significant part of the dental curriculum.

  16. Scientific ballooning in India: recent developments

    Science.gov (United States)

    Joshi, M. N.; Damle, S. V.

    The National Scientific Balloon Facility (NBF) of the Tata Institute of Fundamental Research (TIFR) has been conducting regular balloon flights for various experiments in the areas of Space Astronomy and Atmospheric Sciences. A continuous improvement in all aspects of Scientific Ballooning through a sustained R and D programme ensures uptodate services and a better handle on the design specifications for the balloon. Recent developments in balloon grade films, continuous improvements in design specifications, balloon manufacturing methods, flight operational procedures and improved balloon flight capabilities have resulted in a greatly improved flight performance in the last five years. A launch capability upgradation programme in terms of new launch spool and new launch vehicle has been initiated to be able to safely launch balloons with gross lifts upto 3500 kg, balloon volumes upto 450,000 m^3 and payloads upto 1400 kg. A series of steps have been initiated to improve long duration flight capabilities. In this paper, we present details on some of these aspects of Scientific Ballooning in India.

  17. [Temporomandibular joint, occlusion and bruxism].

    Science.gov (United States)

    Orthlieb, J D; Ré, J P; Jeany, M; Giraudeau, A

    2016-09-01

    Temporomandibular joint and dental occlusion are joined for better and worse. TMJ has its own weaknesses, sometimes indicated by bad functional habits and occlusal disorders. Occlusal analysis needs to be addressed simply and clearly. The term "malocclusion" is not reliable to build epidemiological studies, etiologic mechanisms or therapeutic advice on this "diagnosis". Understanding the impact of pathogenic malocclusion is not just about occlusal relationships that are more or less defective, it requires to locate them within the skeletal framework, the articular and behavioural context of the patient, and above all to assess their impact on the functions of the masticatory system. The TMJ-occlusion couple is often symbiotic, developing together in relation to its environment, compensating for its own shortcomings. However, a third partner may alter this relationship, such as bruxism, or more generally oral parafunctions, trauma or an interventionist practitioner. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  18. Abdominal cavity balloon for preventing a patient's bleeding

    OpenAIRE

    Naber, E.E.H.; Rutten, H.J.T.; Jakimowicz, J.J.; Goossens, R.H.M.; Moes, C.C.M.; Buzink, S.N.

    2007-01-01

    The invention relates to an abdominal cavity balloon for preventing a haemorrhage in a patient's pelvic region, comprising an inflatable balloon, wherein the balloon is pro vided with a smooth surface and with a strip that is flex- urally stiff and formed to follow the balloon's shape for po sitioning the balloon.

  19. The modified pulse-spray method using Urokinase in subacute and chronic thrombotic arterial occlusion

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Youn Kil; Hahn, Seong Tae; Baek, Jee Hee; Kim, Choon Yul; Shinn, Kyung Sub [The Catholic Univ. College of Medicine, Seoul (Korea, Republic of)

    1996-01-01

    To evaluate the effectiveness and safety of the modified pulse-spray method using Urokinase(UK) in subacute and chronic thrombotic arterial occlusion. Modified pulse-spray methods using UK were performed in seven patients with subacute (1 week-1month) to chronic (1month-5years) occlusive symptoms such as limb pain, claudication and impotence. Angiographic examination revealed thrombotic occlusion of the aorta, common iliac arteries, brachial arterio-venous hemodialysis graft and femoro-popliteal bypass graft. The patients underwent thrombolysis using modified pulse-spray and additional constant infusion of UK. In the presence of underlying stenosis or organized clots, balloon angioplasty or stent placement was performed. Complete lysis was obtained in five of seven patients. For initial lysis, the mean dose of UK was 420,000 units, and the mean modified pulse-spray time was 50 minutes. Mean total dose of UK and mean total time for complete lysis were 800,000 units and 161 minutes, respectively. Thrombolysis of the femoro-popliteal bypass graft failed due to severe occlusion of the distal anastomosis. Partial lysis was achieved in one patient with aorto-illac occlusion, but further thrombolysis was stopped due to bleeding at the puncture site. The modified pulse-spray method using UK is effective in treating subacute and chronic arterial thrombotic occlusion. It augments the speed, safety and efficacy of thrombolysis. When underlying stenosis or organized clots remain after thrombolysis, ballon angioplasty or stent placement would be helpful.

  20. [Recanalization of the peripheral arteries by laser thermal balloon angioplasty. 2 years of clinical experience].

    Science.gov (United States)

    Riambau Alonso, V; Masotti Centol, M; Latorre Vilallonga, J; Viver Manresa, E; Crexells Figueres, C; Oriol Palou, A

    1991-01-01

    Laser angioplasty represents an attractive alternative to overcome the limitations of balloon angioplasty. We describe our results with laser thermal balloon angioplasty (LTBA) in the treatment of atherosclerosis obliterans in the lower limbs after two years clinical follow up. We also analyse the influence of lesion characteristics on immediate results. Thirty seven patients (34 men), whose mean age was 58 +/- 9 years, were included in this study. Occlusive arterial disease (Fontaine stage II-IV), with 39 significant haemodynamic arterial lesions were present in all of them. Ankle/brachial Doppler index was O,51 +/- 0,17. Eighteen lesions were located in the iliac area (13 stenoses 2,3 +/- 1 cm of length and 5 occlusions 4,2 +/- 3 cm) and 21 lesions in femoro-popliteal area (5 stenoses 2,6 +/- 2 cm and 16 occlusions 5,7 +/- 3 cm). A percutaneous procedure was used in 38 cases and only in one case a femoral dissection was necessary. The laser source was argon in 26 cases and Nd-YAG in 13. The overall immediate angiographic and clinical success was 85% (89% in iliac lesions and 81% in femoropopliteal lesions; 100% in stenoses and 70% in occlusions). The presence of occlusion (p less than 0,01) and/or calcium (p less than O,05) influenced negatively the immediate results. No major complications were observed. Seven (17%) minor complications occurred, but no emergency surgery was necessary. The ankle/brachial Doppler index after treatment was 0,82 +/- 0,21. Cumulative clinical patency was 91% for successfully treated patients after two years follow up. We conclude that LTBA represents an effective and less aggressive way to treat atherosclerosis obliterans.(ABSTRACT TRUNCATED AT 250 WORDS)

  1. Blast Simulation with Balloons Containing Detonable Gas.

    Science.gov (United States)

    1974-12-11

    to separate the gas components during the launch procedure for high altitude tests. The balloon is partially inflated at launch with methane in one...1 II LEONBL 24 irI GAS LOADING DU - GAS COMMUNICATION DUCT ACCESS DUCT DETONATOR SUPPORT L.INE \\. I ~~ GAS LOADING DUCT’’ BALLON E T BALLOON. Figure 2...rr DNA 3432F BLAST SIMULATION WITH BALLOONS CONTAINING DETONABLE GAS General American Research Division 7449 North Natchez Avenue Niles, Illinois

  2. Hyperspectral Polarimeter for Monitoring Balloon Strain Project

    Data.gov (United States)

    National Aeronautics and Space Administration — NASA's latest generation of superpressure, ultra long duration balloons (ULDB) extend the flight time for stratospheric experiments to levels previously unattainable...

  3. [A case of occlusal reconstruction for disintegration of occlusion].

    Science.gov (United States)

    Nakamura, Kentaroh

    2006-04-01

    A 70-year-old male patient visited our clinic with the chief complaint of masticatory dysfunction due to ill-fitting upper and lower partial dentures. Serious periodontal disease was observed around the remaining teeth. The occlusal condition was crossbite due to mandibular protrusion, and the occlusal supporting area was classified as Eichner's B-3. A Konus telescopic denture was selected as a prosthesis. Dealing with the increase in occlusal force, the sagittal and lateral imbalances found using the Dental Prescale Occluzer system allowed us to minimize the damage to the prosthesis and effects on abutment teeth and periodontal tissue. It is vital to identify and remove early pathological factors of force in postoperative management to prevent the occurrence of new occlusal collapse in the reconstructed stomatognathic system.

  4. Occlusal considerations in implantology: good occlusal practice in implantology.

    Science.gov (United States)

    Davies, Stephen J

    2010-11-01

    This article is concerned with implants that are being used for fixed crown and bridgework rather than removable prostheses. The huge increase in the provision of implants over the past two decades is set to continue. Most of the research is related to avoiding failures in implants. This research, in the main, has concentrated on the essential interface between the artificial implant and living bone: osseointegration. The other interface, which is worthy of our full attention, is the one between the implant-supported crown and the antagonist tooth: the occlusion. This article aims to provide the basis for guidelines for good occlusal practice in implantology. It will consider these under two headings: those which could be considered as basic occlusal principles; and those occlusal considerations that are specific to implants.

  5. Proliferation kinetics of paramecium tetraurelia in balloon-borne experiments

    Energy Technology Data Exchange (ETDEWEB)

    Croute, F.; Soleilhavoup, J.P.; Vidal, S.; Rousseille, R.; Planel, H.

    1982-06-01

    Experiments were carried out to demonstrate the effect of cosmic radiation, at a balloon-flight ceiling of about 36,500 m (120,000 ft) on single-cell organism proliferation. Paramecium tetraurelia were placed in air-tight containers and maintained at 25 degrees +/- 0.1 degrees C. Cellular growth was determined by cell count, either after recovery or during the flight, by means of an automatic fixation device. Dosimetry was performed by a tissue equivalent proportional counter and was of about 0.5 mrad/h. Flight ceiling duration ranged from 48 min - 22 h. A secondary stimulating effect of growth rate, preceded by a temporary decrease, was observed after recovery. Because of the high bacterial concentration in the trans-Mediterranean flight culture medium, the temporary drop of the growth rate, due to the radiolysis products, disappears. Researchers consider that the stimulating effect can be the result of enzymatic intracellular scavenging of radiolysis products generated in the cell.

  6. Balloon Blocking Technique (BBT) for Superselective Catheterization of Inaccessible Arteries with Conventional and Modified Techniques

    Energy Technology Data Exchange (ETDEWEB)

    Morishita, Hiroyuki, E-mail: hmorif@koto.kpu-m.ac.jp, E-mail: mori-h33@xa2.so-net.ne.jp [Japan Red Cross Kyoto Daiichi Hospital, Department of Diagnostic Radiology (Japan); Takeuchi, Yoshito, E-mail: yotake62@qg8.so-net.ne.jp [Kyoto Prefectural University of Medicine, Department of Radiology, North Medical Center (Japan); Ito, Takaaki, E-mail: takaaki@koto.kpu-m.ac.jp [Japan Red Cross Kyoto Daiichi Hospital, Department of Diagnostic Radiology (Japan); Hayashi, Natsuko, E-mail: hayashin@koto.kpu-m.ac.jp [Kyoto Prefectural University of Medicine, Department of Radiology, Graduate School of Medical Science (Japan); Sato, Osamu, E-mail: osamu-sato@kyoto1-jrc.org [Japan Red Cross Kyoto Daiichi Hospital, Department of Diagnostic Radiology (Japan)

    2016-06-15

    PurposeThe purpose of the study was to retrospectively evaluate the efficacy and safety of the balloon blocking technique (BBT).Materials and MethodsThe BBT was performed in six patients (all males, mean 73.5 years) in whom superselective catheterization for transcatheter arterial embolization by the conventional microcatheter techniques had failed due to anatomical difficulty, including targeted arteries originating steeply or hooked from parent arteries. All BBT procedures were performed using Seldinger’s transfemoral method. Occlusive balloons were deployed and inflated at the distal side of the target artery branching site in the parent artery via transfemoral access. A microcatheter was delivered from a 5-F catheter via another femoral access and was advanced over the microguidewire into the target artery, under balloon blockage of advancement of the microguidewire into non-target branches. After the balloon catheter was deflated and withdrawn, optimal interventions were performed through the microcatheter.ResultsAfter success of accessing the targeted artery by BBT, optimal interventions were accomplished in all patients with no complications other than vasovagal hypotension, which responded to nominal therapy.ConclusionThe BBT may be useful in superselective catheterization of inaccessible arteries due to anatomical difficulties.

  7. Peripheral Applications of Drug-Coated Balloons: Past, Present and Future

    Energy Technology Data Exchange (ETDEWEB)

    Krokidis, Miltiadis, E-mail: mkrokidis@hotmail.com; Spiliopoulos, Stavros, E-mail: stavspiliop@upatras.gr; Katsanos, Konstantinos, E-mail: katsanos@med.upatras.gr; Sabharwal, Tarun, E-mail: tarun_sabharwal@yahoo.co.uk [Guy' s and St. Thomas' Hospitals, NHS Foundation Trust, Department of Radiology (United Kingdom)

    2013-04-15

    Drug-coated balloon (DCB) technologies represent the latest and hottest development in the field of endovascular treatment of peripheral arterial disease. Initial experience with paclitaxel-coated balloon use in the femoral artery has demonstrated lower mid-term restenosis and superior mid-term clinical outcomes in terms of improved wound healing and reduced repeat angioplasty rates compared with standard balloon angioplasty. Many companies are presently developing and/or improving DCB catheters and therefore ongoing, technical improvements of the already existing platforms, new drugs, and innovative carriers are expected. The ongoing basic research studies and various multicenter randomized, controlled trials that are currently in progress will offer valuable scientific insights regarding the long-term effectiveness and other crucial issues, such as efficacy in various vascular beds, optimal balloon dosage, and post angioplasty antiplatelet therapy. Future applications of these devices also could include in-stent restenosis, anastomotic stenosis of surgical bypass, and benign stenoses of the central venous system. The authors envision that DCB angioplasty will evolve to a major paradigm shift in the endovascular treatment of occlusive vascular diseases.

  8. Computerized occlusal analysis in bruxism

    Directory of Open Access Journals (Sweden)

    Lazić Vojkan

    2006-01-01

    Full Text Available Introduction. Sleep bruxism as nocturnal parafunction, also known as tooth grinding, is the most common parasomnia (sleep disorder. Most tooth grinding occurs during rapid eye movement - REM sleep. Sleep bruxism is an oral habit characterized by rhythmic activity of the masticatory muscles (m. masseter that causes forced contact between dental surfaces during sleep. Sleep bruxism has been associated with craniomandibular disorders including temporomandibular joint discomfort, pulpalgia, premature loss of teeth due to excessive attrition and mobility, headache, muscle ache, sleep interruption of an individual and problems with removable and fixed denture. Basically, two groups of etiological factors can be distinguished, viz., peripheral (occlusal factors and central (pathophysiological and psychological factors. The role of occlusion (occlusal discrepancies as the causative factor is not enough mentioned in relation to bruxism. Objective. The main objective of this paper was to evaluate the connection between occlusal factors and nocturnal parafunctional activities (occlusal disharmonies and bruxism. Method. Two groups were formed- experimental of 15 persons with signs and symptoms of nocturnal parafunctional activity of mandible (mean age 26.6 years and control of 42 persons with no signs and symptoms of bruxism (mean age 26.3 yrs.. The computerized occlusal analyses were performed using the T-Scan II system (Tekscan, Boston, USA. 2D occlusograms were analyzed showing the occlusal force, the center of the occlusal force with the trajectory and the number of antagonistic tooth contacts. Results. Statistically significant difference of force distribution was found between the left and the right side of the arch (L%-R% (t=2.773; p<0.02 in the group with bruxism. The difference of the centre of occlusal force - COF trajectory between the experimental and control group was not significant, but the trajectory of COF was longer in the group of

  9. Transcending Organization in Temporary Systems

    DEFF Research Database (Denmark)

    Stjerne, Iben Sandal

    Because of their temporary nature, work and employment in project based organizations are different from what we used to see in traditional organizational forms. Temporary employment, entailing less stability within the organization changes how employment and work are organized. Temporary systems...... are organized by transcending organization that go beyond the individual firm and replaces what used to be organized inside the firm. Following several calls for further research on these topics, this dissertation is a small step along the way as it investigates how work and employment are organized...... in temporary systems that lack stability and formal order. It advances our understanding of transcending organization in creative industries by adopting a practice based perspective. Empirically, the dissertation presents an in-depth study of the Danish film industry, which is an extreme case of a project...

  10. Percutaneous balloon dilatation for benign hepaticojejunostomy strictures

    NARCIS (Netherlands)

    Vos, P. M.; van Beek, E. J.; Smits, N. J.; Rauws, E. A.; Gouma, D. J.; Reeders, J. W.

    2000-01-01

    BACKGROUND: Percutaneous balloon dilatation of biliary tract strictures is generally accepted as a safe and inexpensive procedure. The effectiveness in selected groups of patients remains under discussion. The purpose of this study was to evaluate the results of percutaneous balloon dilatation in

  11. Balloon-assisted over-the-wire technique for placement of the venous outflow component of the Hemodialysis Reliable Outflow (HeRO) device.

    Science.gov (United States)

    Ferral, Hector; Behrens, George; Tumer, Yanki; Gueyikian, Sebouh A; Hollinger, Edward F; Jensik, Stephen C

    2013-10-01

    A modified technique for placement of the venous outflow component (VOC) of the Hemodialysis Reliable Outflow (HeRO) device (Hemosphere Inc, Minneapolis, Minn) is described. The purpose of the technique is to improve the system's trackability and facilitate device insertion in patients with central venous occlusion. Device preparation requires placement of a 6-mm × 4-cm angioplasty balloon within the leading end of the VOC. The leading 2 cm of the balloon are placed just distal to the radiopaque marker of the VOC. The balloon is inflated to profile and locked in this position within the leading end of the VOC. The VOC and balloon combination is advanced over the wire through the 20F peel-away sheath provided by the manufacturer. The described technique was used to successfully implant the HeRO device in 12 patients with central venous occlusion. This technique is recommended for placement of the VOC of the HeRO device in patients with central venous occlusions. Copyright © 2013 Society for Vascular Surgery. Published by Mosby, Inc. All rights reserved.

  12. 42 CFR 488.415 - Temporary management.

    Science.gov (United States)

    2010-10-01

    ... 42 Public Health 5 2010-10-01 2010-10-01 false Temporary management. 488.415 Section 488.415... Compliance for Long-Term Care Facilities with Deficiencies § 488.415 Temporary management. (a) Definition. Temporary management means the temporary appointment by CMS or the State of a substitute facility manager or...

  13. Comparison of the occlusal vertical dimension after processing complete dentures made with lingualized balanced occlusion and conventional balanced occlusion.

    Science.gov (United States)

    Basso, Michael Frederico Manzolli; Nogueira, Sergio Sualdini; Arioli-Filho, Joao Neudenir

    2006-09-01

    An increase in occlusal vertical dimension (OVD) may occur after processing complete dentures. Although many factors that generate this change are known, no information is available in the dental literature regarding the effect that the occlusal scheme may have on the change in OVD. This in vitro study compared the increase in OVD, after processing, between complete dentures with teeth arranged in lingualized balanced occlusion and conventional balanced occlusion. Thirty sets of complete dentures were evaluated as follows: 15 sets of complete dentures were arranged in conventional balanced occlusion (control) and 15 sets of complete dentures were arranged in lingualized balanced occlusion. All dentures were compression molded with a long polymerization cycle. The occlusal vertical dimension was measured with a micrometer (mm) before and after processing each set of dentures. Data were analyzed using an independent t test (alpha=.05). The mean increase in the OVD, after processing, was 0.87 +/- 0.21 mm for the control group and 0.90 +/- 0.27 mm for the experimental group. There was no significant difference between the groups. After processing, dentures set in lingualized balanced occlusion showed an increase in OVD similar to those set in conventional balanced occlusion. Although the 2 occlusal concepts resulted in similar increases in the OVD after processing, the lingualized balanced occlusion may result in easier occlusal adjustments, as the less complicated occlusal scheme uses a smaller number of centric occlusion contact points.

  14. Time management in acute vertebrobasilar occlusion.

    Science.gov (United States)

    Kamper, Lars; Rybacki, Konrad; Mansour, Michael; Winkler, Sven B; Kempkes, Udo; Haage, Patrick

    2009-03-01

    Acute vertebrobasilar occlusion (VBO) is associated with a high risk of stroke and death. Although local thrombolysis may achieve recanalization and improve outcome, mortality is still between 35% and 75%. However, without recanalization the chance of a good outcome is extremely poor, with mortality rates of 80-90%. Early treatment is a fundamental factor, but detailed studies of the exact time management of the diagnostic and interventional workflow are still lacking. Data on 18 patients were retrospectively evaluated. Time periods between symptom onset, admission to hospital, time of diagnosis, and beginning of intervention were correlated with postinterventional neurological status. The Glasgow Coma Scale and National Institute of Health Stroke Scale (NIHSS) were used to examine patients before and after local thrombolysis. Additionally, multivariate statistics were applied to reveal similarities between patients with neurological improvement. Primary recanalization was achieved in 77% of patients. The overall mortality was 55%. Major complications were intracranial hemorrhage and peripheral embolism. The time period from symptom onset to intervention showed a strong correlation with the postinterventional NIHSS as well as the patient's age, with the best results in a 4-h interval. Multivariate statistics revealed similarities among the patients. Evaluation of time management in acute VBO by multivariate statistics is a helpful tool for definition of similarities in this patient group. Similarly to the door-to-balloon time for acute coronary interventions, the chances for a good outcome depend on a short time interval between symptom onset and intervention. While the only manipulable time period starts with hospital admission, our results emphasize the necessity of efficient intrahospital workflow.

  15. Intragastric balloon as an adjunct to lifestyle programme in severely obese adolescents: impact on biomedical outcomes and skeletal health.

    Science.gov (United States)

    Sachdev, P; Reece, L; Thomson, M; Natarajan, A; Copeland, R J; Wales, J K; Wright, N P

    2017-09-05

    Intragastric Balloons are a temporary, reversible and safer option compared to bariatric surgery to promote significant weight loss, leading to improved metabolic outcomes. However, due to subsequent weight regain, alternative procedures are now preferred in adults. In adolescents, more amenable to lifestyle change, balloons may be an alternative to less reversible procedures. Our aim was to assess the tolerability and efficacy of the intragastric balloon in severely obese adolescents and the impact of associated weight loss on biomedical outcomes (glucose metabolism, blood pressure, lipid profiles) and bone density. A 2-year cohort study of 12 adolescents (BMI >3.5 s.d., Tanner stage >4) following 6 months intragastric balloon placement was carried out. Subjects underwent anthropometry, oral glucose tolerance test, and DEXA scans at 0, 6 and 24 months. The results showed clinically relevant improvements in blood pressure, insulin: glucose metabolism, liver function and sleep apnoea at 6 months. Changes were not sustained at 2 years though some parameters (Diastolic BP, HBA1c, insulin AUC) demonstrated longer-term improvement despite weight regain. Despite weight loss, bone mass accrual showed age appropriate increases. In conclusion, the intragastric balloon was safe, well tolerated and effective in supporting short-term weight loss and clinically relevant improvement in obesity-related complications, which resolved in some individuals. Benefits were not sustained in the majority at 2 years.International Journal of Obesity advance online publication, 3 October 2017; doi:10.1038/ijo.2017.215.

  16. Occlusion-Aware View Interpolation

    Directory of Open Access Journals (Sweden)

    Janusz Konrad

    2009-01-01

    Full Text Available View interpolation is an essential step in content preparation for multiview 3D displays, free-viewpoint video, and multiview image/video compression. It is performed by establishing a correspondence among views, followed by interpolation using the corresponding intensities. However, occlusions pose a significant challenge, especially if few input images are available. In this paper, we identify challenges related to disparity estimation and view interpolation in presence of occlusions. We then propose an occlusion-aware intermediate view interpolation algorithm that uses four input images to handle the disappearing areas. The algorithm consists of three steps. First, all pixels in view to be computed are classified in terms of their visibility in the input images. Then, disparity for each pixel is estimated from different image pairs depending on the computed visibility map. Finally, luminance/color of each pixel is adaptively interpolated from an image pair selected by its visibility label. Extensive experimental results show striking improvements in interpolated image quality over occlusion-unaware interpolation from two images and very significant gains over occlusion-aware spline-based reconstruction from four images, both on synthetic and real images. Although improvements are obvious only in the vicinity of object boundaries, this should be useful in high-quality 3D applications, such as digital 3D cinema and ultra-high resolution multiview autostereoscopic displays, where distortions at depth discontinuities are highly objectionable, especially if they vary with viewpoint change.

  17. Occlusion-Aware View Interpolation

    Directory of Open Access Journals (Sweden)

    Ince Serdar

    2008-01-01

    Full Text Available Abstract View interpolation is an essential step in content preparation for multiview 3D displays, free-viewpoint video, and multiview image/video compression. It is performed by establishing a correspondence among views, followed by interpolation using the corresponding intensities. However, occlusions pose a significant challenge, especially if few input images are available. In this paper, we identify challenges related to disparity estimation and view interpolation in presence of occlusions. We then propose an occlusion-aware intermediate view interpolation algorithm that uses four input images to handle the disappearing areas. The algorithm consists of three steps. First, all pixels in view to be computed are classified in terms of their visibility in the input images. Then, disparity for each pixel is estimated from different image pairs depending on the computed visibility map. Finally, luminance/color of each pixel is adaptively interpolated from an image pair selected by its visibility label. Extensive experimental results show striking improvements in interpolated image quality over occlusion-unaware interpolation from two images and very significant gains over occlusion-aware spline-based reconstruction from four images, both on synthetic and real images. Although improvements are obvious only in the vicinity of object boundaries, this should be useful in high-quality 3D applications, such as digital 3D cinema and ultra-high resolution multiview autostereoscopic displays, where distortions at depth discontinuities are highly objectionable, especially if they vary with viewpoint change.

  18. Heat Transfer Model for Hot Air Balloons

    Science.gov (United States)

    Llado-Gambin, Adriana

    A heat transfer model and analysis for hot air balloons is presented in this work, backed with a flow simulation using SolidWorks. The objective is to understand the major heat losses in the balloon and to identify the parameters that affect most its flight performance. Results show that more than 70% of the heat losses are due to the emitted radiation from the balloon envelope and that convection losses represent around 20% of the total. A simulated heating source is also included in the modeling based on typical thermal input from a balloon propane burner. The burner duty cycle to keep a constant altitude can vary from 10% to 28% depending on the atmospheric conditions, and the ambient temperature is the parameter that most affects the total thermal input needed. The simulation and analysis also predict that the gas temperature inside the balloon decreases at a rate of -0.25 K/s when there is no burner activity, and it increases at a rate of +1 K/s when the balloon pilot operates the burner. The results were compared to actual flight data and they show very good agreement indicating that the major physical processes responsible for balloon performance aloft are accurately captured in the simulation.

  19. Trajectory Control For High Altitude Balloons

    Science.gov (United States)

    Aaron, K.; Nock, K.; Heun, M.; Wyszkowski, C.

    We will discuss the continuing development of the StratoSailTM Balloon Trajectory Control System presented at the 33rd COSPAR in 2000. A vertical wing suspended on a 15-km tether from a high altitude balloon uses the difference in wind velocity between the altitude of the balloon and the altitude of the wing to create an aerodynamic sideforce. This sideforce, transmitted to the balloon gondola via the tether, causes the balloon to move laterally. Although the balloon's resultant drift velocity is quite small (a few meters per second), the effect becomes significant over long periods of time (hours to days). Recently, a full-scale wing, rudder and boom assembly has been fabricated, a winch system testbed has been completed, and a lightweight tether with reduced susceptibility to ultraviolet damage has been developed. The development effort for this invention, with pending international patents, has been funded by the NASA/SBIR program in support of the Ultra Long Duration Balloon (ULDB) program.

  20. Abdominal cavity balloon for preventing a patient's bleeding

    NARCIS (Netherlands)

    Naber, E.E.H.; Rutten, H.J.T.; Jakimowicz, J.J.; Goossens, R.H.M.; Moes, C.C.M.; Buzink, S.N.

    2007-01-01

    The invention relates to an abdominal cavity balloon for preventing a haemorrhage in a patient's pelvic region, comprising an inflatable balloon, wherein the balloon is pro vided with a smooth surface and with a strip that is flex- urally stiff and formed to follow the balloon's shape for po

  1. Accurate Determination of the Volume of an Irregular Helium Balloon

    Science.gov (United States)

    Blumenthal, Jack; Bradvica, Rafaela; Karl, Katherine

    2013-01-01

    In a recent paper, Zable described an experiment with a near-spherical balloon filled with impure helium. Measuring the temperature and the pressure inside and outside the balloon, the lift of the balloon, and the mass of the balloon materials, he described how to use the ideal gas laws and Archimedes' principal to compute the average molecular…

  2. The natural shape balloon and related models

    Science.gov (United States)

    Baginski, F.; Winker, J.

    Typically, the design shape of a large scientific balloon is an axisymmetric stat- ically determinate shape in which only the weight of the balloon system and the lifting gas are taken into consideration. These equations were originally developed in the 1950s at the University of Minnesota, and in the special case when the circumferential stress is zero, have come to be known as the natural shape equations. Over the years, variants of these equations have been redis- covered and their relation to the general framework sometimes obscured. We will present a brief exposition of the natural shape equations, and show how a number of balloon models follow from it.

  3. Looners: Inside the world of balloon fetishism

    OpenAIRE

    McIntyre, Karen E

    2011-01-01

    In the spring of 1997, Shaun had just broken up with a boyfriend, and his roommate had moved out. Living alone for the first time and relieved of the fear that someone might walk in the door, he was finally able to indulge his fantasy. The young man sat on his couch and started blowing up balloons. Shaun had loved playing with balloons since he was a child. When he hit puberty, he felt his first orgasm rubbing against a balloon. It was then that his relationship with the object took ...

  4. Endoluminal occlusion devices: technology update

    Directory of Open Access Journals (Sweden)

    Zander T

    2014-12-01

    Full Text Available Tobias Zander,1 Samantha Medina,1 Guillermo Montes,1 Lourdes Nuñez-Atahualpa,1 Michel Valdes,1 Manuel Maynar1,2 1Endoluminal/Vascular Department, Hospiten Hospital Group, Santa Cruz de Tenerife, 2University of Las Palmas de Gran Canarias, Las Palmas, Canary Island, Spain Abstract: Endoluminal occlusion has been performed since the early beginning of interventional radiology. Over recent decades, major technological advances have improved the techniques used and different devices have been developed for changing conditions. Most of these occlusion devices have been implemented in the vascular territory. Early embolization materials included glass particles, hot contrast, paraffin, fibrin, and tissue fragments such as muscle fibers and blood clots; today, occlusion materials include metallic devices, particles, and liquid materials, which can be indicated for proximal or distal occlusion, high-flow and low-flow situations, and in large-caliber and small-caliber vessels, based on need. Technological progress has led to a decreased size of delivery catheters, and an increase in safety due to release systems that permit the withdrawing and replacement of embolization material. Furthermore, bioactive embolization materials have been developed to increase the efficacy of embolization or the biological effect of medication. Finally, materials have been modified for changing indications. Intravascular stents were initially developed to keep an artery open; however, by adding a covering membrane, these stents can be used to occlude the wall of a vessel or other endoluminal structures. This article gives an overview of the devices most utilized for occlusion of endoluminal structures, as well as their major purpose in the endovascular territory. Keywords: embolization, endovascular treatment, occlusion devices, hemorrhage, aneurysm, fistula

  5. Modeling of ultrathin occlusal veneers.

    Science.gov (United States)

    Magne, Pascal; Stanley, Kyle; Schlichting, Luís Henrique

    2012-07-01

    The purpose of this investigation was to compare stresses within bonded porcelain and composite resin ultra-thin occlusal veneers to restore advanced erosive lesions. A sound maxillary molar was digitized with a micro-CT scanner. The 2D image data were converted in a 3D model using an interactive medical image processing software (Mimics). Standard triangle language files (STL files) of enamel and dentin surfaces were then exported to the software 3-matic to execute design and meshing operations. Solid 3-dimensional (3-D) models acquired in a finite element software (Marc/Mentat) were subjected to nonlinear contact analysis to simulate occlusal loading at 200N and 800N. Values of maximum principal stress and ultimate tensile strength were used to calculate the risk of fracture and for validation with existing experimental data. There were marked differences in stress distributions both at 200N (maximum peak values of 21.59, 28.63, 31.04MPa) and 800N (96.16, 115.73, 134.90MPa) for all restorative materials (MZ100, Empress CAD and e.max CAD, respectively). High tensile stresses (measured in the central groove) were found at 800N with the ceramic occlusal veneers showing occlusal stress peaks 17-29% higher than composite resin. The estimated risk of fracture was decreased for ultrathin composite resin occlusal veneers, which correlated with the existing validation data. Ultra-thin composite resin (MZ100) and lithium disilicate (e.max CAD) occlusal veneers represent a conservative alternative to traditional onlays and complete coverage crowns for the treatment of severe erosive lesions in the posterior dentition. Copyright © 2012 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

  6. Temporary Clusters and Knowledge Creation

    DEFF Research Database (Denmark)

    Maskell, Peter; Bathelt, Harald; Malmberg, Anders

    2004-01-01

    to distant markets and technologies. Third, it compares such temporaryclusters with permanent territorial hubs within their respective sector or industry. If regularparticipation in temporary clusters could satisfy a firm's need to learn through interactionwith suppliers, customers, peers and rivals, why...... or participating in such events are means toidentify the current market frontier, take stock of relative competitive positions and formfuture plans. These events exhibit many of the characteristics ascribed to permanentclusters, albeit in a temporary, periodic and intensified form. The temporary clusters...... is the phenomenon of permanent clusteringso pervasive?The answer, it is claimed, lies in the restrictions imposed on economic activity whenknowledge and ideas are transformed into valuable products and services. The paper shedsnew light on how interaction among firms in current clusters coincides...

  7. Endograft Limb Occlusion in EVAR

    DEFF Research Database (Denmark)

    Taudorf, M; Jensen, L P; Vogt, K C

    2014-01-01

    occlusions were recorded and compared with a defined control group. Three different indices were used to describe the tortuosity of the iliac vessels based on preoperative CTA: pelvic artery index of tortuosity (PAI), common iliac artery index of tortuosity (CAI), and a visual description of vessel......% at 3 years. Logistic regression showed that iliac artery tortuosity (DIS) (p = .001) and body mass index (p = .007) had a significant impact on graft patency. CONCLUSION: A tortuous vessel on the preoperative CTA is associated with an increased risk of limb occlusion after EVAR. Adjunctive stenting...

  8. Fetal endoscopic tracheal occlusion for congenital diaphragmatic hernia: indications, outcomes, and future directions.

    Science.gov (United States)

    Ruano, Rodrigo; Ali, Raheel A; Patel, Parin; Cass, Darrell; Olutoye, Oluyinka; Belfort, Michael A

    2014-03-01

    In the present study, we review the indications, technical aspects, preliminary results, risks, and clinical implications of fetal endoscopic tracheal occlusion (FETO) for severe congenital diaphragmatic hernia (CDH) performed outside the United States and its potential future directions in this country and globally. Congenital diaphragmatic hernia occurs in approximately 1 in 2500 live births and results in high neonatal morbidity and mortality, largely associated with the severity of pulmonary hypoplasia and pulmonary arterial hypertension. With the advent of prenatal imaging, CDH can be diagnosed before birth, and in utero treatment is now available in some centers. The prognosis of CDH can be evaluated by assessing the fetal lung size, the degree of liver herniation, and the fetal pulmonary vasculature in isolated forms of CDH. These parameters help classify fetuses as having mild, moderate, severe, or extremely severe isolated CDH. Severe and extremely severe diaphragmatic hernias have poor outcomes and thus are candidates for innovative therapies such as FETO. Fetal endoscopic tracheal occlusion is usually performed between 26 and 30 weeks' gestation. In utero, an endoscope is passed through the fetal mouth and down to the carina; the balloon is deployed just above the carina. After the procedure, ultrasound surveillance every 2 weeks ensures the balloon's structural integrity and measures the fetal pulmonary response. At approximately 34 weeks' gestation, the balloon is deflated and removed. Fetal endoscopic tracheal occlusion is thought to improve outcomes by decreasing mortality and allowing more rapid neonatal stabilization. Ultimately, the goal of FETO is to minimize pulmonary hypoplasia and pulmonary arterial hypertension. Following delivery, neonates still require diaphragm repair.

  9. Magnetometer for Balloons and UAVs Project

    Data.gov (United States)

    National Aeronautics and Space Administration — This Phase I SBIR project will investigate a new, low-cost approach to atomic magnetometry that is suited for operation from UAVs and research balloons. Atomic...

  10. Shielded Mars Balloon Launcher (SMBL) Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Aurora Flight Sciences, along with its partner Vertigo Industries, proposes a novel approach to deployment of balloon-based payloads into the Martian atmosphere....

  11. Apical ballooning syndrome: a case report

    Science.gov (United States)

    2012-01-01

    Background Apical ballooning syndrome mimics acute coronary syndromes and it is characterized by reversible left ventricular apical ballooning in the absence of angiographically significant coronary artery stenosis. Case presentation This is a case of a 40-year-old Caucasian male without any health related problems that was submitted to an urgent coronary angiography because of acute chest pain and marked precordial T-wave inversions suggestive of acute myocardial ischemia. Coronary angiography showed no significant stenosis of the coronary arteries. Left ventriculography showed systolic apical ballooning with mild basal hypercontraction. Conclusion Physicians should be aware of the presentation of apical ballooning syndrome, and the chest pain after following acute stress should not be readily attributed to anxiety. PMID:23270409

  12. Retrieving Balloon Data in Flight Project

    Data.gov (United States)

    National Aeronautics and Space Administration —   NASA has plans to fly stratospheric ULDBs for missions of 100 days or more in the next few years. As these balloons circumnavigate the globe multiple times,...

  13. DISCOVER: Dutch Iliac Stent trial: COVERed balloon-expandable versus uncovered balloon-expandable stents in the common iliac artery: study protocol for a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Bekken Joost A

    2012-11-01

    Full Text Available Abstract Background Iliac artery atherosclerotic disease may cause intermittent claudication and critical limb ischemia. It can lead to serious complications such as infection, amputation and even death. Revascularization relieves symptoms and prevents these complications. Historically, open surgical repair, in the form of endarterectomy or bypass, was used. Over the last decade, endovascular repair has become the first choice of treatment for iliac arterial occlusive disease. No definitive consensus has emerged about the best endovascular strategy and which type of stent, if any, to use. However, in more advanced disease, that is, long or multiple stenoses or occlusions, literature is most supportive of primary stenting with a balloon-expandable stent in the common iliac artery (Jongkind V et al., J Vasc Surg 52:1376-1383,2010. Recently, a PTFE-covered balloon-expandable stent (Advanta V12, Atrium Medical Inc., Hudson, NH, USA has been introduced for the iliac artery. Covering stents with PTFE has been shown to lead to less neo-intimal hyperplasia and this might lower restenosis rates (Dolmatch B et al. J Vasc Interv Radiol 18:527-534,2007, Marin ML et al. J Vasc Interv Radiol 7:651-656,1996, Virmani R et al. J Vasc Interv Radiol 10:445-456,1999. However, only one RCT, of mediocre quality has been published on this stent in the common iliac artery (Mwipatayi BP et al. J Vasc Surg 54:1561-1570,2011, Bekken JA et al. J Vasc Surg 55:1545-1546,2012. Our hypothesis is that covered balloon-expandable stents lead to better results when compared to uncovered balloon-expandable stents. Methods/Design This is a prospective, randomized, controlled, double-blind, multi-center trial. The study population consists of human volunteers aged over 18 years, with symptomatic advanced atherosclerotic disease of the common iliac artery, defined as stenoses longer than 3 cm and occlusions. A total of 174 patients will be included. The control group will undergo

  14. Occlusion Issues in Early Renaissance Art

    National Research Council Canada - National Science Library

    Gillam, Barbara

    2011-01-01

    .... Much has been written about perspective in art but little about occlusion. Here I examine some of the strategies for depicting occlusion used by early Renaissance painters in relation to ecological considerations and perceptual research...

  15. Power Systems Design for Long Duration Ballooning

    Science.gov (United States)

    Stilwell, Bryan; Chuzel, Alain

    2016-01-01

    The Columbia Scientific Balloon Facility has been designing and building high-altitude balloon power systems for over 26 years. With that experience, we have found certain types of PV panels, batteries, and charge controllers that are reliable in stratospheric environments. The ultimate goal is to ensure that power systems will provide power reliably throughout the duration of an LDB flight. The purpose of this presentation is to provide some general guidelines and best practices for power system design.

  16. Test ventilation with smoke, bubbles, and balloons

    Energy Technology Data Exchange (ETDEWEB)

    Pickering, P.L.; Cucchiara, A.L.; McAtee, J.L.; Gonzales, M.

    1987-01-01

    The behavior of smoke, bubbles, and helium-filled balloons was videotaped to demonstrate the mixing of air in the plutonium chemistry laboratories, a plutonium facility. The air-distribution patterns, as indicated by each method, were compared. Helium-filled balloons proved more useful than bubbles or smoke in the visualization of airflow patterns. The replay of various segments of the videotape proved useful in evaluating the different techniques and in identifying airflow trends responsible for air mixing. 6 refs.

  17. Dental occlusion and temporomandibular disorders.

    Science.gov (United States)

    Stone, J Caitlin; Hannah, Andrew; Nagar, Nathan

    2017-10-27

    Data sourcesMedline, Scopus and Google Scholar.Study selectionTwo reviewers selected studies independently. English language clinical studies assessing the association between temporomandibular disorders (TMD) and features of dental occlusion were considered.Data extraction and synthesisStudy quality was assessed based on the Newcastle-Ottawa Scale (NOS) and a narrative synthesis was presented.ResultsIn all 25 studies (17 case-control, eight comparative) were included. Overall there was a high variability between occlusal features and TMD diagnosis. Findings were consistent with a lack of clinically relevant association between TMD and dental occlusion. Only two studies were associated with TMD in the majority (≥50%) of single variable analyses in patient populations. Only mediotrusive interferences are associated with TMD in the majority of multiple variable analyses.ConclusionsThe findings support the absence of a disease-specific association, there is no ground to hypothesise a major role for dental occlusion in the pathophysiology of TMDs. Dental clinicians are thus encouraged to move forward and abandon the old-fashioned gnathological paradig.

  18. A controversy with respect to occlusion

    OpenAIRE

    Fukushima, Shunji

    2016-01-01

    Summary There are very little controversies on occlusion in healthy individuals, where centric relation is regarded as the criterion for assessing the present occlusion and also for establishing a new occlusal relationship between the upper and the lower jaws. On the other hand, the occlusal position in patients with deformed condyles still remains to be clarified. In this review, the effectiveness and limits of centric relation in these patients are discussed. In addition, the muscle induced...

  19. Clinical issues in occlusion – Part II

    OpenAIRE

    Patel, Mahul; Alani, Aws

    2015-01-01

    Occlusal diagnosis plays an important role in the planning and subsequent delivery of predictable functional and aesthetic restorations and prostheses. Once an occlusal problem is identified there are a number of techniques and materials that can be utilised to record occlusal relationships, subsequently analyse them and incorporate information obtained into the delivery of tooth restoration or replacement. This paper discusses the clinical and technical aspects of occlusal examination and an...

  20. Objects as Temporary Autonomous Zones

    Directory of Open Access Journals (Sweden)

    Tim Morton

    2011-09-01

    Full Text Available From Hakim Bey's instructions on creating temporary autonomous zones we see an oscillation "between performance art and politics, circus clowning and revolution." In this essay Tim Morton discusses anarchist politics as, "the creation of fresh objects in a reality without a top or a bottom object, or for that matter a middle object."

  1. Nursing Intervention During Temporary Care

    Science.gov (United States)

    Curry, Judith B.

    1974-01-01

    The role of the professional nurse in asseviating or minimizing the separation anxiety and traumatic impact on families during temporary placement of a retarded child in a residential facility is seen in two case studies of girls 3 and 12 years of age. (Author/MC)

  2. Temporary risk identification in urolithiasis.

    Science.gov (United States)

    Marickar, Y M Fazil; Salim, Abiya

    2009-12-01

    We have been using a risk index calculation for urolithiasis, which included most of the identifiable factors promoting calculogenesis. However, it was observed that the frequency of a patient getting stone problem was not uniform in spite of similarity of the risk index in the permanent setting. Also, many of the risk indices could be changed by dietary or lifestyle modifications. The objective of this paper was to calculate the temporary risk index of a patient at the time of each visit and correlate with stone activity during such periods, so that appropriate advice could be given on drugs, diet and lifestyle changes. The temporary risk index score was based on four symptoms, namely pain (0, nil; 1, vague pain; 2, mild; 3, moderate; 4, severe; 5, excruciating), haematuria (0, nil; 1, turbid; 2, cloudy; 3, reddish; 4, occasional frank blood; 5, continuous frank blood), burning sensation (0, nil; 1, minimal; 2, moderate; 3, terminal severe; 4, occasional excruciating; 5, continuous excruciating), and dysuria (0, nil; 1, minimal; 2, moderate; 3, terminal severe; 4, occasional excruciating, 5, continuous excruciating), ultrasonography for back pressure (0, nil; 1, mild; 2, moderate; 3, severe kidney and ureter; 4, unilateral total; 5, bilateral total anuria) and eight urine deposit findings (0, nil; 1, +; 2, 2+; 3, 3+; 4, 4+; 5, plenty), red blood cells, pus cells, whewellite crystals, weddellite crystals, phosphate crystals, uric acid/ammonium urate crystals, crystal clumping and crystal aggregation making a total of 13 parameters. Each parameter was given values ranging from 0 to 5. The total score was calculated and chemotherapeutic regimes were decided base on the score, which varied from 0 to 65. Hundred randomly selected patients who had been visiting the stone clinic for a minimum of five occasions were included in the study. The total scores of temporary risk were correlated with the permanent clinical risk score mentioned earlier. The temporary risk of the

  3. Feasibility of Endovascular Radiation Therapy Using Holmium-166 Filled Balloon Catheter in a Swine Hemodialysis Fistula Model: Preliminary Results

    Energy Technology Data Exchange (ETDEWEB)

    Won, Jong Yun; Lee, Kwang Hun; Lee, Do Yun [Dept. of Radiology, Research Institute of Radiological Science, Yensei University College of Medicine, Seoul (Korea, Republic of); Kim, Myoung Soo [Dept. of Radiology, Yensei University College of Medicine, Seoul (Korea, Republic of); Kang, Byung Chul [Dept. of Radiology, Internal Medicine, EwhaWoman' s University School of Medicine, Seoul (Korea, Republic of); Kim, Seung Jung [Dept. of Internal Medicine, EwhaWoman' s University School of Medicine, Seoul (Korea, Republic of)

    2011-08-15

    To describe how to make a swine hemodialysis fistula model and report our initial experience to test the feasibility of endovascular radiation therapy with Holmium-166 filled balloon catheters. The surgical formation of arterio-venous fistula (AVF) was performed by end-to-side anastomosis of the bilateral jugular vein and carotid artery of 6 pigs. After 4 weeks, angiograms were taken and endovascular radiation was delivered to the venous side of AVF with Holmium-166 filled balloon catheters. Pigs were sacrificed 4 weeks after the radiation and AVFs were harvested for histological examination. All animals survived without any morbidity during the experimental periods. The formation of fistula on the sides of necks was successful in 11 of the 12 pigs (92%). One AVF failed from the small jugular vein. On angiograms, 4 of the 11 AVFs showed total occlusion or significant stenosis and therefore, endovascular radiation could not be performed. Of 7 eligible AVFs, five underwent successful endovascular radiation and two AVFs did not undergo radiation for the control. Upon histologic analysis, one non-radiated AVF showed total occlusion and others showed intimal thickening from the neointimal hyperplasia. Formation of the swine carotid artery-jugular vein hemodialysis fistula model was successful. Endovascular radiation using a Holmium-166 filled balloon catheter was safe and feasible.

  4. Malignant occlusion of the coeliac axis

    Energy Technology Data Exchange (ETDEWEB)

    Jonsson, K.; Wattsgaard, C.; Genell, S. (Malmoe Allmaenna Sjukhus, Malmoe (Sweden). Dept. of Diagnostic Radiology)

    1982-01-01

    Occlusion or extensive stenosis of the coeliac trunk due to malignant tumor are described in three patients. If, at angiography of a patient with a malignant tumor, occlusion of the coeliac trunk is found, tumor or lymph node metastases causing the occlusion must be considered; this may be of importance when intra-arterial chemotherapy of the tumor is planned.

  5. Infrainguinal vein graft stenosis: cutting balloon angioplasty as the first-line treatment of choice.

    Science.gov (United States)

    Schneider, Peter A; Caps, Michael T; Nelken, Nicolas

    2008-05-01

    The optimal treatment for hemodynamically significant infrainguinal vein bypass graft stenosis is not known. This study compares three options as first choice for the revision of failing infrainguinal vein grafts: cutting balloon angioplasty (CBA), standard percutaneous transluminal balloon angioplasty (PTA), and open surgical revision (OS). Infrainguinal vein bypass graft lesions treated in a single institution during a 12-year period were evaluated. Of these, 161 lesions in 124 infrainguinal bypasses (101 patients) were treated with OS (n = 42), PTA (n = 57), or CBA (n = 62). The initial indication for the bypass in these patients was limb salvage in 73% and claudication in 27%. The primary outcome of interest was the development of vein graft occlusion or significant stenosis (>or=70%) as detected by surveillance duplex ultrasound scanning or arteriography some time after repair. The stenosis-free patency rates at 48 months for OS, CBA, and PTA were 74%, 62%, and 34%, respectively. PTA was associated with an increased risk of treatment failure compared with both OS (hazard ratio [HR], 3.9; P difference between OS and CBA (HR, 1.3 for CBA vs OS, P = .6). Pseudoaneurysms developed in two CBA patients. One ruptured and required interposition graft, and one was monitored. Cutting balloon angioplasty is a reasonable, initial treatment for infrainguinal vein graft stenosis in most patients. It is a safe, minimally invasive, outpatient procedure with patency rates that are comparable to OS and superior to PTA.

  6. Traumatic axillary artery pseudoaneurysm treated with intravascular balloon occlusion and percutaneous thrombin injection

    Directory of Open Access Journals (Sweden)

    Maria Carratola, BS

    2014-01-01

    Full Text Available Axillary artery pseudoaneurysms are relatively rare, with few reported cases found in the literature. Furthermore, treatment with percutaneous thrombin injection has not yet been reported. We report the case of a 59-year-old man with a large (10 cm post-traumatic pseudoaneurysm of the left axillary artery found five weeks after a motorcycle crash. The patient sustained multiple injuries, including fractures of the left scapula and clavicle. Edema was observed at the time of diagnosis. Arteriography with successful ultrasound-guided percutaneous thrombin injection was undertaken. The patient experienced no complications after the procedure.

  7. A Clinical Series of Resuscitative Endovascular Balloon Occlusion of the Aorta for Hemorrhage Control and Resuscitation

    Science.gov (United States)

    2013-01-01

    right acetabulum fracture with hemitransverse fractures , an inferior pubic rami fracture , and a medially displaced wall of the acetabulum . Computed...tomography (CT) showed this fracture and several pelvic he- matomas. The patient was taken to the operating room for acetabular repair when he became

  8. The ELANA technique : Constructing a high flow bypass using a non-occlusive anastomosis on the ICA and a conventional anastomosis on the SCA in the treatment of a fusiform giant basilar trunk aneurysm

    NARCIS (Netherlands)

    Streefkerk, HJN; Wolfs, JFC; Sorteberg, W; Sorteberg, AG; Tulleken, CAF

    A patient with a partially thrombosed fusiform giant basilar trunk aneurysm presented with devastating headache and symptoms of progressive brain stem compression. Having an aneurysm inaccessible for endovascular treatment, and after failing a vertebral artery balloon occlusion test, he was offered

  9. Air-filled vs water-filled intragastric balloon: a prospective randomized study.

    Science.gov (United States)

    Giardiello, Cristiano; Borrelli, Alessandro; Silvestri, Eufemia; Antognozzi, Valentina; Iodice, Giuseppe; Lorenzo, Michele

    2012-12-01

    The positioning of an intragastric saline-filled balloon has been developed as temporary and reversible therapeutic option for treatment of morbid obesity. Recently, an air-filled balloon was also developed. The aim of this study is to prospectively compare these two devices in terms of weight loss parameters, safety, and tolerance. Sixty patients were randomized into two groups: group A (Bioenterics Intragastric Balloon-BIB; n = 30; 20 F/10 M, mean age 36.7 ± 10.9; mean BMI 46.5 ± 5.9) and group B (Endobag-Heliosphere; n = 30; 20 F/10 M, mean age 37.8 ± 10.6; mean BMI 46.1 ± 5.6). All patients of both groups were sedated with midazolam (5 mg) + Propofol (2 mg/kg i.v.). The Heliosphere Bag was air-filled with 950 ml while BIB® was inflated with 500 ml of saline and 10 ml of methylene blue. Percentage of excess weight loss (%EWL) and body mass index (BMI) were evaluated. Student t test, Fisher exact test, and χ(2) test were used for statistical analysis. Similar weight loss parameters were observed in patients treated with liquid or air-filled balloon at time of removal: mean BMI was 40.8 ± 6.2 and 41.9 ± 6.5(p = ns), and mean %EWL was 20 ± 12 and 18 ± 14 (p = ns) in groups A and B, respectively. Significant longer extraction time, with high patient discomfort, was observed in group B due to difficult passage through the cardia and the lower pharynx. Air-filled balloon can be another valid therapeutic option in the temporary treatment of obesity, but at this time, the quality of the device must be improved to ameliorate the patient compliance at removal and avoid the spontaneous deflations.

  10. The importance of internal carotid artery occlusion tolerance test in carotid endarterectomy under locoregional anesthesia.

    Science.gov (United States)

    Dellaretti, Marcos; de Vasconcelos, Laura T; Dourado, Jules; de Souza, Renata F; Fontoura, Renato R; de Sousa, Atos A

    2016-06-01

    Carotid endarterectomy is considered a safe and effective method for preventing stroke in the short and long term in patients with severe carotid stenosis. The internal carotid artery (ICA) occlusion tolerance test was performed to evaluate cerebral tolerance during temporary carotid occlusion, defined as the capacity of the cerebral hemisphere to maintain adequate cerebral blood flow during occlusion of the ICA. Thus, the aim of the present study is to determine the importance of this test in patients undergoing carotid endarterectomy. From August 2008 to May 2015, 115 consecutive patients (39 female, 77 male) were referred for carotid endarterectomy at the Santa Casa de Belo Horizonte by the main author. Of the 115 patients who participated in the study, 107 were submitted to carotid endarterectomy. Morbi-mortality was 2.7 %. The presence of deficits during the ICA occlusion tolerance test in less than 30 s was associated with the presence of complications. Among the 104 patients who showed no deficits during the test, only one case (0.9 %) presented complications, while among the three cases that showed deficits during the test and who were submitted to carotid endarterectomy, two cases presented complications (p carotid endarterectomy under locoregional anesthesia is a safe surgical procedure. The internal carotid artery occlusion tolerance test can help identify high-risk patients who have been assigned this treatment.

  11. [Coronary angioplasty using double balloon in artery of large calibre (hugging balloons)].

    Science.gov (United States)

    Centemero, M P; Cano, M N; Maldonado, G; de Almeida, J D; Sousa, A G; Sousa, J E

    1993-07-01

    In this case report the transluminal coronary angioplasty was performed in a oversized right coronary artery with a severe lesion with thrombus inside, using the Hugging balloon technique (two dilatation balloon catheters used simultaneously). This technique achieved minimal residual lesion and had a favorable clinical outcome of the patient.

  12. Interventional Radiological Treatment of Perihepatic Vascular Stenosis or Occlusion in Pediatric Patients After Liver Transplantation

    Energy Technology Data Exchange (ETDEWEB)

    Uller, Wibke, E-mail: wibke.uller@klinik.uni-regensburg.de [University Medical Center Regensburg, Department of Radiology (Germany); Knoppke, Birgit [KUNO University Children' s Hospital Regensburg, University Medical Center Regensburg (Germany); Schreyer, Andreas G.; Heiss, Peter [University Medical Center Regensburg, Department of Radiology (Germany); Schlitt, Hans J. [University Medical Center Regensburg, Department of Surgery (Germany); Melter, Michael [KUNO University Children' s Hospital Regensburg, University Medical Center Regensburg (Germany); Stroszczynski, Christian [University Medical Center Regensburg, Department of Radiology (Germany); Zorger, Niels [Krankenhaus Barmherzige Brueder, Department of Radiology (Germany); Wohlgemuth, Walter A. [University Medical Center Regensburg, Department of Radiology (Germany)

    2013-12-15

    Purpose: Evaluation of the efficacy and safety of percutaneous treatment of vascular stenoses and occlusions in pediatric liver transplant recipients. Methods: Fifteen children (mean age 8.3 years) underwent interventional procedures for 18 vascular complications after liver transplantation. Patients had stenoses or occlusions of portal veins (n = 8), hepatic veins (n = 3), inferior vena cava (IVC; n = 2) or hepatic arteries (n = 5). Technical and clinical success rates were evaluated. Results: Stent angioplasty was performed in seven cases (portal vein, hepatic artery and IVC), and sole balloon angioplasty was performed in eight cases. One child underwent thrombolysis (hepatic artery). Clinical and technical success was achieved in 14 of 18 cases of vascular stenoses or occlusions (mean follow-up 710 days). Conclusion: Pediatric interventional radiology allows effective and safe treatment of vascular stenoses after pediatric liver transplantation (PLT). Individualized treatment with special concepts for each pediatric patient is necessary. The variety, the characteristics, and the individuality of interventional management of all kinds of possible vascular stenoses or occlusions after PLT are shown.

  13. [Occlusion of secondary branches after angioplasty of the left descending coronary artery].

    Science.gov (United States)

    Araújo, E C; Sousa, A G; Nicolela Júnior, E L; Cano, M N; Maldonado, G; Feres, F; Mattos, L A; Pinto, I M; Tanajura, L F; Fontes, V F

    1990-05-01

    To evaluate the incidence and clinical presentation of the occlusion of such secondary branches in patients with single vessel coronary artery disease in the left anterior descending artery, who underwent a first elective and successful PTCA. Two hundred and thirteen side branches of 121 patients considered to be at risk. They were divided into group I (GI-85 side branches, 39.9%), if they originated from the atherosclerotic site; and group II (GII-120 side branches, 61.5%), if their origin would be involved during the balloon inflation. In the GI there were 54 septal branches and 31 diagonal branches, and 36& had angiographic evidence of ostium disease. GII was constituted by 77 septal and 51 diagonal branches, and 7.8% of them had evidence of ostium disease. Seven side branches (3.3%) at risk occluded, 4 from GI (4.7%) and 3 (2.3%) from GII. As for the clinical presentation, 57% of them had angina, where as 28.6% showed minor abnormalities in the ECG. No patient elevated its serum CK-MB, and silent occlusion occurred in 43% of them. Occlusion of side branches is a low incidence phenomenon, which happens more often in septal branches with ostium disease that originates from the atherosclerotic site; that about half of the patient had silent occlusion (43%) or mild ischemic manifestations.

  14. Vertex occlusal radiography in localizing unerupted mesiodentes

    Directory of Open Access Journals (Sweden)

    P Chalakkal

    2011-01-01

    Full Text Available The aim was to compare the vertex occlusal projection with the anterior maxillary occlusal projection in localizing the position of mesiodentes. Mesiodentes were observed in an 8-year-old boy with an anterior maxillary occlusal radiograph. A vertex occlusal radiograph was taken to compare it with the former in terms of mesiodentes localization with respect to the maxillary central incisors. The vertex occlusal radiograph provided greater details of the position and proximity of mesiodentes with respect to the long axis of maxillary central incisors in comparison to the anterior maxillary occlusal radiograph. Vertex occlusal radiography is an important diagnostic tool in diagnosing the presence, position, and proximity of mesiodentes with respect to the long axis of normally aligned maxillary central incisors. However, it is not recommended for routine use in a patient as its radiation dose is higher than conventional intraoral radiographic methods.

  15. Clinical issues in occlusion - Part II.

    Science.gov (United States)

    Patel, Mahul; Alani, Aws

    2015-12-01

    Occlusal diagnosis plays an important role in the planning and subsequent delivery of predictable functional and aesthetic restorations and prostheses. Once an occlusal problem is identified there are a number of techniques and materials that can be utilised to record occlusal relationships, subsequently analyse them and incorporate information obtained into the delivery of tooth restoration or replacement. This paper discusses the clinical and technical aspects of occlusal examination and analysis outlining contemporary and traditional techniques in their utilisation. Aspects of occlusal examination will be revisited; the identification and recording of centric occlusion as well as subsequent articulation will be discussed. The requirement for occlusal splint provision will also be discussed and illustrated. Copyright © 2015. Published by Elsevier B.V.

  16. Temporary Residences: a becoming project

    Directory of Open Access Journals (Sweden)

    Luisa Ingaramo

    2012-04-01

    Full Text Available Among the experimental actions fostered so far by the Compagnia di San Paolo through its Housing Program, committed in handling the complex and fragmented housing discomfort issue, the Temporary Dwellings initiative represents a unique and innovative experience, as it actually offers the chance to activate a proper managerial direction around and about the real estate development processes. In particular, the Temporary Dwellings action is marked by two key aspects: a structured co-planning vision and projects selected through a requests for proposal system. The process in the whole aims on the one hand at reaching an high transparent level of decision making , while, on the other hand, at developing a continuous and mutual monitoring and matching activity between the Housing Program and the group of cross-curricular experts teamed up in the project: technicians, designers, managers, psychologists, contractors, and the other local stakeholders.

  17. Qualitative haemodynamic validation of a percutaneous temporary aortic valve: a proof of concept study.

    Science.gov (United States)

    Ho, P C

    2011-02-01

    The concept of temporary aortic valves has been suggested in the clinical settings of acute aortic regurgitation and transcatheter aortic valve replacement procedure (TAVR). In TAVR, suggestions have been made to pre-treat or remove the diseased aortic valve prior to implantation of the replacement valve. A successful temporary aortic valve must demonstrate the ability to prevent life-threatening haemodynamics of massive aortic regurgitation. A novel temporary aortic valve (TAV) design, comprised of inflatable balloon elements as a check-valve, can readily be deployed and retrieved via a catheter-system. A simple flow model is set up to test the TAV's performance in severe aortic regurgitation. With induced aortic regurgitation, placement of the TAV is found to increase the distal aortic diastolic pressure, to reduce the widened pulse pressure, to protect proximal aorta-left ventricle from diastolic pressure elevation and to reduce the aortic regurgitant volume. In conclusion, continued development of the TAV system can lead to a successful temporary aortic valve to be used in various appropriate clinical settings.

  18. Occlusal status among Yemeni children

    Directory of Open Access Journals (Sweden)

    Nabil M Al-Zubair

    2014-01-01

    Full Text Available Objectives: The purpose of this study was to assess the occlusal status in schoolchildren in Yemen, and to compare the results with those of other studies. Materials and Methods: The sample for this epidemiological survey consisted of 3003 primary school students, half of whom were boys and the other half girls, aged 12 years. The subjects were randomly selected, and none had received previous orthodontic treatment. Variables examined included intra-arch irregularities and malalignment (crowding and spacing in the incisal segments of the arch and midline diastema and discrepancies in occlusal contact relationship (maxillary overjet, mandibular overjet, anterior openbite and antero-posterior molar relation. Results: The results showed that about 26.1% of the subjects were still in the late mixed dentition stage and 73.9% presented with a dentition in the early permanent stage. Normal overjet was found in 55% of the sample. Crowding was observed in 31.4% of the subjects and midline diastema in 14.2%. Conclusion: Occlusal status among Yemeni children was characterized by a relatively high frequency of dental crowding, as well as a relatively high frequency of anterior mandibular overjet (Class III malocclusions.

  19. Neuromuscular function in healthy occlusion.

    Science.gov (United States)

    Forrester, S E; Allen, S J; Presswood, R G; Toy, A C; Pain, M T G

    2010-09-01

    This study aimed to measure neuromuscular function for the masticatory muscles under a range of occlusal conditions in healthy, dentate adults. Forty-one subjects conducted maximum voluntary clenches under nine different occlusal loading conditions encompassing bilateral posterior teeth contacts with the mandible in different positions, anterior teeth contacts and unilateral posterior teeth contacts. Surface electromyography was recorded bilaterally from the anterior temporalis, superficial masseter, sternocleidomastoid, anterior digastric and trapezius muscles. Clench condition had a significant effect on muscle function (P = 0.0000) with the maximum function obtained for occlusions with bilateral posterior contacts and the mandible in a stable centric position. The remaining contact points and moving the mandible to a protruded position, whilst keeping posterior contacts, resulted in significantly lower muscle activities. Clench condition also had a significant effect on the per cent overlap, anterior-posterior and torque coefficients (P = 0.0000-0.0024), which describe the degree of symmetry in these muscle activities. Bilateral posterior contact conditions had significantly greater symmetry in muscle activities than anterior contact conditions. Activity in the sternocleidomastoid, anterior digastric and trapezius was consistently low for all clench conditions, i.e. centric position, whilst with anterior teeth contacts, both the muscle activity and the degree of symmetry in muscle activity are significantly reduced.

  20. Large capacity temporary visual memory

    Science.gov (United States)

    Endress, Ansgar D.; Potter, Mary C.

    2014-01-01

    Visual working memory (WM) capacity is thought to be limited to three or four items. However, many cognitive activities seem to require larger temporary memory stores. Here, we provide evidence for a temporary memory store with much larger capacity than past WM capacity estimates. Further, based on previous WM research, we show that a single factor — proactive interference — is sufficient to bring capacity estimates down to the range of previous WM capacity estimates. Participants saw a rapid serial visual presentation (RSVP) of 5 to 21 pictures of familiar objects or words presented at rates of 4/s or 8/s, respectively, and thus too fast for strategies such as rehearsal. Recognition memory was tested with a single probe item. When new items were used on all trials, no fixed memory capacities were observed, with estimates of up to 9.1 retained pictures for 21-item lists, and up to 30.0 retained pictures for 100-item lists, and no clear upper bound to how many items could be retained. Further, memory items were not stored in a temporally stable form of memory, but decayed almost completely after a few minutes. In contrast, when, as in most WM experiments, a small set of items was reused across all trials, thus creating proactive interference among items, capacity remained in the range reported in previous WM experiments. These results show that humans have a large-capacity temporary memory store in the absence of proactive interference, and raise the question of whether temporary memory in everyday cognitive processing is severely limited as in WM experiments, or has the much larger capacity found in the present experiments. PMID:23937181

  1. The influence of premature loss of temporary upper molars on permanent molars.

    Science.gov (United States)

    Cernei, E R; Maxim, Dana Cristiana; Zetu, Irina Nicoleta

    2015-01-01

    Premature loss of primary molars due to dental caries and their complications has been associated with space loss and eruptive difficulties, especially when the loss occurs early. The aim of our study was to determine the impact of premature loss of temporary upper molars upon the longitudinal axis of the first and second upper permanent molar. The study group included 64 patients 6-9 years old with premature loss of primary molars and a control group of 48 patients with intact temporary teeth. It was evaluated the angle between longitudinal axis of first and second upper permanent molars and occlusal plane. The sofware used is Easy Dent 4 Viewer®.The data were analyzed by using the Statistical Package for the Social Sciences (version 20.0; SPSS, Chicago, III). It was observed that premature loss of upper second deciduous molars modifies greater the vertical axis of the permanent molars than the premature loss of first upper primary molar. First upper primary molar loss cause an acceleration eruption of first premolar, which will produce a distal inclintion of the both permanent molars. The use of space maintainers after premature loss of the second upper temporary molar is a last solution in preventing tridimensional lesions in the dental arch and occlusion.

  2. The mechanics of dental occlusion and disclusion.

    Science.gov (United States)

    Katona, Thomas R; Eckert, George J

    2017-12-01

    The mechanical environment associated with occluding teeth is the foundation for a wide range of research topics, clinical practice and dogma, product development and marketing, and medico-legal issues. The purpose of this study was to experimentally examine the relationships between occlusal factors and their impact on the associated contact forces. Matching pairs of 0°, 20°, 33° and 40° cusp first molar denture teeth were placed into Class I, II and III molar relationships. As the teeth were brought together into occlusion and then separated, the loads experienced by the mandibular tooth were continuously measured by a load cell that was supporting it. Loess smoothing splines were fitted to all data curves to calculate 95% confidence intervals. All lateral force magnitudes and directions were statistically different when compared between classes of occlusion, cusp angles, and occlusion vs. disclusion. Noteworthy counterintuitive observations were that the lateral contact force components were generally higher during disclusion than occlusion, the peak lateral force magnitudes did not always occur when the occlusal force was maximum, and the lateral contact force component magnitude can be larger than the occlusal force. Wedging and friction account for these unexpected results. The data indicate that each occlusion/disclusion cycle is characterized by complex transient loads that may impact wear facet and non-carious cervical lesion formation, implant and restorative failures, various aspects of occlusal trauma, and the concept of axial occlusal loading. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. Balloon dilatation of the prostatic urethra

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Yeon Soo; Shim, Hyung Jin; Cha, Kyung Soo; Hong, Ju Hee; Lim, Myung Ah; Kim, Cheol Soo [Sung Ae General Hospital, Seoul (Korea, Republic of)

    1991-03-15

    We analyzed the result of transurethral balloon dilatation in 11 patients with benign prostatic hypertrophy. The procedures were performed under intravenous sedation and local anesthesia with double lumen balloon catheter at 4 atmosphere for 10 minutes. After dilatation, the prostatism symptom scores improved in 10 out of 11 patients and the mean diameter of the prostatic urethra significantly increased form 4.3 mm to 10.2 mm ({rho} < 0.005). The procedures were successful not only in lateral lobe hypertrophy but also in median lobe hypertrophy of the prostate. Postdilatation MRI of 1 patient showed an intact prostatic capsule and no periprostatic hematoma. Complications did not develop except in 1 patient with mild hematuria and incontinence. These preliminary results suggest that transurethral balloon dilatation can be an effective and safe treatment modality for benign prostatic hypertrophy.

  4. [Intragastric balloons--the new hope in bariatry?].

    Science.gov (United States)

    Rydzewska, Grazyna; Milewski, Janusz

    2004-01-01

    The concept of intragastric space-occupying balloon developed from observations in psychiatric patients with gastric bezoars. Several gastric balloons consisting of different materials were developed. The BioEnterics Intagastric Balloon System (BIB) is a smooth, spherical, silicone elastomer balloon inducing satiety and restricting food intake. The balloon is indicated to induce weight loss in patients before surgery, to reduce the surgical risk, to select the patients for gastric restrictive surgery. Our experience showed that patients who had good results with the balloon they are good candidates for gastric restrictive surgical procedures. There were few complications: balloon intolerance, spontaneous deflation, oesophagitis, gastritis and rarely gastric ulcers. Conclusion is that in selected patients intragastric balloon can be used as effective and safe approach and could be a great help to induce weight loss and to prepare for surgery.

  5. Mechanics of stretchable electronics on balloon catheter under extreme deformation

    National Research Council Canada - National Science Library

    Su, Yewang; Liu, Zhuangjian; Wang, Shuodao; Ghaffari, Roozbeh; Kim, Dae-Hyeong; Hwang, Keh-Chih; Rogers, John A; Huang, Yonggang

    2014-01-01

    ... ([approximately equal to]vacuum) and outside of the balloon (pressure [approximately equal to]1atm). The balloon catheter, on which microelectrodes and interconnects are printed, undergoes extreme mechanical deformation during its inflation and deflation...

  6. Radial dilation of nephrostomy balloons: a comparative analysis

    OpenAIRE

    Kari Hendlin; Manoj Monga

    2008-01-01

    PURPOSE: The dynamics of percutaneous balloon expansion may differ with increasing extrinsic compressive forces and increasing inflation pressures. This study compares the ability of percutaneous balloons to expand under different radial constrictive forces. MATERIALS AND METHODS: Three 30F nephrostomy balloons were tested: Bard X-Force™, Boston Scientific Microvasive Amplatz Tractmaster™, and Cook Ultraxx™. With a super stiff guidewire in place, the balloon tip was secured ...

  7. 21 CFR 884.5050 - Metreurynter-balloon abortion system.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Metreurynter-balloon abortion system. 884.5050... Devices § 884.5050 Metreurynter-balloon abortion system. (a) Identification. A metreurynter-balloon abortion system is a device used to induce abortion. The device is inserted into the uterine cavity...

  8. Ballooning behavior in the golden orbweb spider Nephilapilipes (Araneae: Nephilidae

    Directory of Open Access Journals (Sweden)

    Vanessa M.J. Lee

    2015-01-01

    Full Text Available Ballooning, a mode of aerial dispersal in spiders, is an innate behavior that requires appropriate physiological and meteorological conditions. Although only rarely reported in the golden orbweb spiders, family Nephilidae, the large geographic distributions of most nephilids—in particular of Nephila species—would imply that these spiders likely routinely disperse by ballooning in spite of giant female sizes. Here we study ballooning behavior in the golden orbweb spider Nephila pilipes (Fabricius, 1793. Specifically, we test for the propensity of spiderlings to deploy ballooning as a dispersal mechanism. We subjected a total of 59 first-instar spiderlings to a wind experiment at two wind speeds (2.17 ± 0.02 m s-1 and 3.17 ± 0.02 m s-1 under laboratory conditions. Under an average wind speed of 3.17 m s-1, none of the spiderlings exhibited pre-ballooning or ballooning behavior. However, at an average wind speed of 2.17 m s-1, 53 (89.8% spiderlings showed pre-ballooning behavior, and 17 (32.1% of the pre-ballooners ultimately ballooned. Our results concur with prior reports on spiderlings of other families that pre-ballooning behavior is a requirement for ballooning to occur. Furthermore, although we cannot rule out other dispersal mechanisms such as synanthropic spread, our findings suggest that the widespread N. pilipes uses ballooning to colonize remote oceanic islands.

  9. Outcomes of intragastric balloon placements in a private practice setting

    NARCIS (Netherlands)

    Mathus-Vliegen, Elisabeth M. H.; Alders, Peter R. H.; Chuttani, Ram; Scherpenisse, Joost

    2015-01-01

    Intragastric balloons are used as a treatment for obesity. Much of the data collected on balloons has been in the context of clinical trials in academic medical centers or as a bridge to bariatric surgery in obesity centers. The aim of this study was to investigate the efficacy and safety of balloon

  10. Intra-aortic balloon clamp for safe resternotomy in a patient with a giant aneurysm of sinuses of Valsalva.

    Science.gov (United States)

    Zembala, Michal Oscar; Filipiak, Krzysztof; Niklewski, Tomasz; Przybylski, Roman

    2015-02-01

    Despite advances in surgical techniques and postoperative medical management, the mortality rates for cardiac reoperations remain high. The risk is most commonly associated with failed resternotomy complicated by fatal injury to the myocardium or its structures. This short case report documents the first use of an endoluminal balloon occlusive device in order to prevent aneurysmal sack damage and coronary vessel injury in a patient with a giant aortic aneurysm after failed aortic surgery. The safe aortic occlusion allowed for closed-chest cardioplegia delivery and subsequent aortic unloading, thus facilitating a difficult but uneventful resternotomy. © The Author 2014. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery. All rights reserved.

  11. Combined surface and volumetric occlusion shading

    KAUST Repository

    Schott, Matthias O.

    2012-02-01

    In this paper, a method for interactive direct volume rendering is proposed that computes ambient occlusion effects for visualizations that combine both volumetric and geometric primitives, specifically tube shaped geometric objects representing streamlines, magnetic field lines or DTI fiber tracts. The proposed algorithm extends the recently proposed Directional Occlusion Shading model to allow the rendering of those geometric shapes in combination with a context providing 3D volume, considering mutual occlusion between structures represented by a volume or geometry. © 2012 IEEE.

  12. Occlusion management of implant-supported prostheses

    OpenAIRE

    Delmas, Marion

    2017-01-01

    The implant solution has become the treatment of choice to replace missing teeth and to help in the retention of complete denture. Dental implants have different biological and biomechanical characteristics than natural teeth. Occlusion of implant-supported prostheses is considered to be one of the most important factors contributing to implant success. This thesis aims to review current recommendations for occlusal management of implant-supported prosthesis. The known and applied occlusal co...

  13. Occlusion and periodontics: a critical literature review

    OpenAIRE

    Flávia Aparecida Chaves FURLANETO; Luiz Gustavo Nascimento de MELO; Maria José Hitomi NAGATA; Alvaro Francisco BOSCO; Tatiana Miranda DELIBERADOR; Michel Reis MESSORA; Alicio Rosalino GARCIA

    2009-01-01

    Introduction: Occlusal trauma is defined as an injury resulting intissues changes within the attachment apparatus as result of occlusalforce(s). Since 1901, when Karolyi reported a possible interactionbetween occlusal disharmony and periodontal alterations, severalstudies have tried to find scientific evidence that corroborates or not this interrelationship. Objective and literature review: In this paper,the authors review the studies that have analyzed traumatic occlusion as a presumed aggra...

  14. Clinical significance of balloon dilatation angiography during cerebral venous sinus stenosis stenting

    Directory of Open Access Journals (Sweden)

    Xiang-yu CAO

    2016-12-01

    Full Text Available Objective To explore the clinical significance of balloon dilatation angiography during cerebral venous sinus stenosis stenting to predict the reflux of perforator veins after operation. Methods A total of 93 patients (including 51 with cerebral venous sinus stenosis and intracranial hypertension and 42 with intractable pulsatile tinnitus caused by cerebral venous sinus stenosis who were treated by stent implantation were analyzed retrospectively. Among those patients, the diameter of transverse and sigmoid sinuses of 63 cases were measured based on angiography, and stent was selected according to the measurement result. The other 30 cases were given angiography on ipsilateral carotid artery or vertebral artery when the balloon was dilated in the venous sinus to confirm the reflux of perforator veins. If the venous reflux decreased in the angiography, stent with diameter 1-2 mm less than that of venous sinus could be selected.  Results The success rate of stenting was 100% (93/93. In 63 cases, 45 cases were planted 9 mm × 40 mm stents, 15 were planted 8 mm × 40 mm stents, 3 were planted 7 mm × 40 mm stents. The average diameter of stents was (8.67 ± 0.68 mm. There were 11 cases (17.46% with slow perforator venous reflux after operation. In the other 30 cases, 3 cases were planted 8 mm × 40 mm stents, 11 were planted 7 mm × 40 mm stents, and 16 were planted 6 mm × 40 mm stents. The average diameter of stents was (7.57 ± 0.67 mm. There was only one case (3.33% with slow perforator venous reflux after operation. The difference of stent diameter between 2 groups was statistically significant (t = 15.632, P = 0.001. The occurrence rate of perforator vein occlusion after operation between 2 groups was significantly different (adjusted χ 2 = 60.065, P = 0.001.  Conclusions Perforator vein occlusion after cerebral venous sinus stenting is common complication. Balloon dilatation angiography could predict the possibility of perforator vein

  15. Carotid angioplasty-assisted mechanical thrombectomy without urgent stenting may be a better option in acute tandem occlusions.

    Science.gov (United States)

    Akpinar, Cetin K; Gürkaş, Erdem; Aytac, Emrah

    2017-08-01

    Background The aim of the study was to assess the efficacy of balloon angioplasty-assisted mechanical thrombectomy without urgent stenting in the carotid artery as another approach for endovascular treatment of tandem occlusions. Methods Fifteen consecutive cases of tandem occlusions treated with the endovascular approach between January 2014 and May 2016 were reviewed. The study cohort included patients with an etiology of large vessel atherosclerosis. Extracranial carotid stenting was performed in another session if post-thrombectomy mRS modified Rankin Score (mRS) was 0-2. Good clinical outcome was determined by follow-up at 7-10, 30 and 90 days according to the mRS. Results Most patients (80%) were male. Eight (53.4%) patients received intravenous thrombolysis before angiography. Proximal revascularization was successful in 100% of cases with balloon angioplasty internal carotid artery (ICA) origin. Successful recanalization (modified thrombolysis in cerebral infarction (mTICI) 2b-3) (mTICI 2 b-3) occurred in 12 cases (80%) and good clinical outcomes were achieved in 10 patients (66.7%). Cervical ICA stent placement was performed in 10 patients with good clinical outcomes. No symptomatic intracranial hemorrhage occurred after delayed ICA stenting Conclusions This is the first reported case series to evaluate this approach for endovascular treatment of tandem occlusions. Carotid angioplasty-assisted mechanical thrombectomy without urgent stenting seems to be a safer approach.

  16. Single-balloon versus double-balloon bipedicular kyphoplasty for osteoporotic vertebral compression fractures.

    Science.gov (United States)

    Wang, Heng; Sun, Zhenzhong; Wang, Zhiwen; Jiang, Weimin

    2015-04-01

    Twenty-eight patients with osteoporotic vertebral compression fractures (OVCF) were treated with single-balloon bipedicular kyphoplasty (Group A), and 40 patients were treated with double-balloon bipedicular kyphoplasty (Group B). Visual Analogue Scale (VAS) score, vertebral height, and kyphotic angle (KA) were evaluated pre-operatively, post-operatively (3 days after surgery) and at final follow-up. Operative time, X-ray exposure frequency and costs were recorded. The mean operative time and X-ray exposure frequency in Group A were greater than in Group B (pkyphoplasty is a safe and cost-effective surgical method for the treatment of OVCF. It can achieve pain relief comparable with double-balloon bipedicular kyphoplasty. However, double-balloon bipedicular kyphoplasty is more efficacious in terms of the restoration of vertebral height and reduction of KA, and the operative time and X-ray exposure frequency are lower. Copyright © 2014 Elsevier Ltd. All rights reserved.

  17. Fasting and meal-suppressed ghrelin levels before and after intragastric balloons and balloon-induced weight loss

    NARCIS (Netherlands)

    Mathus-Vliegen, E. M. H.; Eichenberger, R. I.

    2014-01-01

    Intragastric balloons may be an option for obese patients with weight loss failure. Its mode of action remains enigmatic. We hypothesised depressed fasting ghrelin concentrations and enhanced meal suppression of ghrelin secretion by the gastric fundus through balloon contact and balloon-induced

  18. Assessment of occlusion curriculum in predoctoral dental education: report from ACP Task Force on Occlusion Education.

    Science.gov (United States)

    Lee, Damian J; Wiens, Jonathan P; Ference, John; Donatelli, David; Smith, Rick M; Dye, Bryan D; Obrez, Ales; Lang, Lisa A

    2012-10-01

    The purposes of this report were to (1) assess the current occlusion curriculum in the predoctoral prosthodontic education of US dental institutions and (2) to examine the opinions of faculty, course directors, and program directors on the contents of occlusion curriculum. The Task Force on Occlusion Education from the American College of Prosthodontists (ACP) conducted two surveys using a web-based survey engine: one to assess the current status of occlusion education in predoctoral dental education and another to examine the opinions of faculty and course directors on the content of occlusion curriculum. The sections in the surveys included demographic information, general curriculum information, occlusion curriculum for dentate patients, occlusion curriculum for removable prosthodontics, occlusion curriculum for implant prosthodontics, temporomandibular disorder (TMD) curriculum, teaching philosophy, concepts taught, and methods of assessment. The results from the surveys were compiled and analyzed using descriptive statistics. The results from the two surveys on general concepts taught in occlusion curriculum were sorted and compared for discrepancies. According to the predoctoral occlusion curriculum surveys, canine guidance was preferred for dentate patients, fixed prosthodontics, and fixed implant prosthodontics. Bilateral balanced occlusion was preferred for removable prosthodontics and removable implant prosthodontics. There were minor differences between the two surveys regarding the occlusion concepts being taught and the opinions of faculty members teaching occlusion. Two surveys were conducted regarding the current concepts being taught in occlusion curriculum and the opinions of educators on what should be taught in occlusion curriculum. An updated and clearly defined curriculum guideline addressing occlusion in fixed prosthodontics, removable prosthodontics, implant prosthodontics, and TMD is needed. © 2012 by the American College of Prosthodontists.

  19. Space and Earth Observations from Stratospheric Balloons

    Science.gov (United States)

    Peterzen, Steven; Ubertini, Pietro; Masi, Silvia; Ibba, Roberto; Ivano, Musso; Cardillo, Andrea; Romeo, Giovanni; Dragøy, Petter; Spoto, Domenico

    Stratospheric balloons are rapidly becoming the vehicle of choice for near space investigations and earth observations by a variety of science disciplines. With the ever increasing research into climatic change, instruments suspended from stratospheric balloons offer the science team a unique, stable and reusable platform that can circle the Earth in the polar region or equatorial zone for thirty days or more. The Italian Space Agency (ASI) in collaboration with Andoya Rocket Range (Andenes, Norway) has opened access in the far northern latitudes above 78o N from Longyearbyen, Svalbard. In 2006 the first Italian UltraLite Long Duration Balloon was launched from Baia Terra Nova, Mario Zuchelli station in Antarctica and now ASI is setting up for the their first equatorial stratospheric launch from their satellite receiving station and rocket launch site in Malindi, Kenya. For the equatorial missions we have analysed the statistical properties of trajectories considering the biennal oscillation and the seasonal effects of the stratospheric winds. Maintaining these launch sites offer the science community 3 point world coverage for heavy lift balloons as well as the rapidly deployed Ultralight payloads and TM system ASI developed to use for test platforms, micro experiments, as well as a comprehensive student pilot program

  20. Low dose intravaginal misoprostol versus intracervical balloon ...

    African Journals Online (AJOL)

    Need for oxytocin augmentation was less in the misoprostol group (RR 0.76, 95% CI 0.64 to 0.91). No significant differences existed in rates for uterine hyperstimulation, Caesarean section, maternal and neonatal morbidity. Conclusion:Intravaginal misoprostol in a low dose was compared to intracervical balloon catheter for ...

  1. MHD Ballooning Instability in the Plasma Sheet

    Energy Technology Data Exchange (ETDEWEB)

    C.Z. Cheng; S. Zaharia

    2003-10-20

    Based on the ideal-MHD model the stability of ballooning modes is investigated by employing realistic 3D magnetospheric equilibria, in particular for the substorm growth phase. Previous MHD ballooning stability calculations making use of approximations on the plasma compressibility can give rise to erroneous conclusions. Our results show that without making approximations on the plasma compressibility the MHD ballooning modes are unstable for the entire plasma sheet where beta (sub)eq is greater than or equal to 1, and the most unstable modes are located in the strong cross-tail current sheet region in the near-Earth plasma sheet, which maps to the initial brightening location of the breakup arc in the ionosphere. However, the MHD beq threshold is too low in comparison with observations by AMPTE/CCE at X = -(8 - 9)R(sub)E, which show that a low-frequency instability is excited only when beq increases over 50. The difficulty is mitigated by considering the kinetic effects of ion gyrorad ii and trapped electron dynamics, which can greatly increase the stabilizing effects of field line tension and thus enhance the beta(sub)eq threshold [Cheng and Lui, 1998]. The consequence is to reduce the equatorial region of the unstable ballooning modes to the strong cross-tail current sheet region where the free energy associated with the plasma pressure gradient and magnetic field curvature is maximum.

  2. There is a Text in 'The Balloon'

    DEFF Research Database (Denmark)

    Elias, Camelia

    2009-01-01

    From the Introduction: Camelia Elias' "There is a Text in 'The Balloon': Donald Barthelme's Allegorical Flights" provides its reader with a much-need and useful distinction between fantasy and the fantastic: "whereas fantasy in critical discourse can be aligned with allegory, in which a supernatu......From the Introduction: Camelia Elias' "There is a Text in 'The Balloon': Donald Barthelme's Allegorical Flights" provides its reader with a much-need and useful distinction between fantasy and the fantastic: "whereas fantasy in critical discourse can be aligned with allegory, in which....... The concept of knowledge and story-telling is exemplified in the Biblical Fall-myth and in Scheherazade. Here Camelia Elias' gendered and witty point is that man knows (or rather wishes to know) and that woman knows (but does not tell). Finally, the meaning of a giant balloon appearing in the sky over New...... York in Donald Barthelme's short story  "The Balloon" from 1968 is discussed in the light of the chapter's epistemological understanding of fantasy....

  3. Low dose intravaginal misoprostol versus intracervical balloon ...

    African Journals Online (AJOL)

    Background:The efficacy and safety of low dose misoprostol as a ripening agent compared to the widely used balloon catheter in developing countries is undetermined. Objective:To compare the safety and efficacy of a low dose intravaginal misoprostol and intracervical Foley's catheter for cervical ripening. Design:A ...

  4. Double-balloon endoscopy: Who needs it?

    DEFF Research Database (Denmark)

    Hendel, J.W.; Vilmann, P.; Jensen, T.

    2008-01-01

    Objective. Double-balloon endoscopy (DBE) made the small bowel accessible to inspection and therapy in its entirety. However, DBE is a time-consuming procedure that requires a highly skilled endoscopist, several nurses and - more often than not - anesthesiological support. This makes the selection...

  5. Evaluation of the Solitaire system in a canine arterial thromboembolic occlusion model: is it safe for the endothelium?

    Science.gov (United States)

    Park, Soonchan; Hwang, Seon Moon; Song, Joon Seon; Suh, Dae Chul; Lee, Deok Hee

    2013-12-01

    The Solitaire system has recently been increasingly used for acute stroke treatment in which the endothelial safety immediately after its use has not been evaluated. This study was performed to evaluate the endothelial status when using a Solitaire system in a canine arterial occlusion model. Thromboembolic occlusion of both internal maxillary arteries was achieved in five mongrel dogs. In each animal, the Solitaire system (ev3, Irvine, CA, USA) was used for primary thrombectomy on the right side and for temporary stenting on the left side. Efficacy was assessed by comparing the recanalization rates, and safety was assessed using angiographic and microscopic assessments. Endothelial injuries were evaluated with light microscopy (LM) and scanning electron microscopy (SEM). Successful revascularizations were observed following primary thrombectomy in all five animals (100%) and after temporary stenting in two (40%). There was no incidence of vasospasm or vessel perforation in either group. Distal migration of the clot occurred in two animals that underwent primary thrombectomy. Endothelial injury was seen after primary thrombectomy in two animals (40%) and after temporary stenting in one (20%). The lesions presented as defects of the internal elastic lamina on LM and denudation of the wavy endothelial surface on SEM. During mechanical thrombectomy, the Solitaire system can cause endothelial injury both in primary thrombectomy and temporary stenting. Primary thrombectomy is likely to have a higher recanalization rate with increased endothelial injury.

  6. On the Sharing of Temporary Parental Leave

    DEFF Research Database (Denmark)

    Amilon, Anna

    2007-01-01

    This paper views temporary parental leave (leave from work to take care of a sick child) as a household public good, produced with time inputs of the parents as the only input. Assuming equal productivities in the production of temporary parental leave and equal utility functions of the spouses......-point of the female is found to push the intra household allocation of temporary parental leave towards greater sharing between the spouses. In addition, an increase in the insurance ceiling will further sharing of temporary parental leave in some families, while reducing it in others....

  7. Stratospheric Balloon Platforms for Near Space Access

    Science.gov (United States)

    Dewey, R. G.

    2012-12-01

    For over five decades, high altitude aerospace balloon platforms have provided a unique vantage point for space and geophysical research by exposing scientific instrument packages and experiments to space-like conditions above 99% of Earth's atmosphere. Reaching altitudes in excess of 30 km for durations ranging from hours to weeks, high altitude balloons offer longer flight durations than both traditional sounding rockets and emerging suborbital reusable launch vehicles. For instruments and experiments requiring access to high altitudes, engineered balloon systems provide a timely, responsive, flexible, and cost-effective vehicle for reaching near space conditions. Moreover, high altitude balloon platforms serve as an early means of testing and validating hardware bound for suborbital or orbital space without imposing space vehicle qualifications and certification requirements on hardware in development. From float altitudes above 30 km visible obscuration of the sky is greatly reduced and telescopes and other sensors function in an orbit-like environment, but in 1g. Down-facing sensors can take long-exposure atmospheric measurements and images of Earth's surface from oblique and nadir perspectives. Payload support subsystems such as telemetry equipment and command, control, and communication (C3) interfaces can also be tested and operationally verified in this space-analog environment. For scientific payloads requiring over-flight of specific areas of interests, such as an active volcano or forest region, advanced mission planning software allows flight trajectories to be accurately modeled. Using both line-of-sight and satellite-based communication systems, payloads can be tracked and controlled throughout the entire mission duration. Under NASA's Flight Opportunities Program, NSC can provide a range of high altitude flight options to support space and geophysical research: High Altitude Shuttle System (HASS) - A balloon-borne semi-autonomous glider carries

  8. Recovery of Renal Function after Prolonged Anuria in Acute Suprarenal Aortic Occlusion.

    Science.gov (United States)

    Jongkind, Vincent; Kievit, Jur K; Wiersema, Arno M

    2016-01-01

    Acute suprarenal aortic occlusion is a rare but often catastrophic event. Despite immediate treatment, mortality and morbidity are high. We present a case of acute suprarenal aortic occlusion presenting with renal failure and dyspnea but without lower limb ischemia. Diagnosis was initially not taken in consideration. The patient required hemodialysis and temporary mechanical ventilation. After 13 days, an abdominal ultrasound was performed which revealed thrombosis of the suprarenal abdominal aorta. Suprarenal aortic thrombectomy was performed followed by aortobi-iliac bypass grafting. Diuresis returned 4 hr after surgery, and the patient fully recovered. Thorough review of the literature revealed only 8 cases of acute suprarenal aortic occlusion. Only 3 patients survived. To our knowledge, this is the first reported case of acute suprarenal occlusion, in which renal function could be restored after a 14-day period of anuria. The case illustrates that in select cases with prolonged acute renal failure aortorenal revascularization can be performed successfully. Copyright © 2016 Elsevier Inc. All rights reserved.

  9. Restoration of the Occlusal Vertical Dimension with an Overlay Removable Partial Denture: A Clinical Report.

    Science.gov (United States)

    Zanardi, Piero Rocha; Santos, Mayara Silva; Stegun, Roberto Chaib; Sesma, Newton; Costa, Bruno; Laganá, Dalva Cruz

    2016-10-01

    The process of tooth loss throughout life associated with severe occlusal wear may pose a challenge in the rehabilitation of partially edentulous arches. In these cases, many therapeutic procedures are necessary because each tooth must be restored to obtain the correct anatomical contour and recover the occlusal vertical dimension (OVD). A removable partial denture (RPD) with occlusal/incisal coverage, also known as an overlay RPD, is an alternative treatment option with fewer interventions, and, consequently, lower cost. This clinical report reviews the principles involved in the clinical indication for an overlay RPD, as well as the necessary planning and execution, to discuss the feasibility and clinical effectiveness of this treatment, identifying the indications, advantages, and disadvantages of this procedure through the presentation of a clinical case. The overlay RPD can be an alternative treatment for special situations involving partially edentulous arches in patients who need reestablishment of the OVD and/or realignment of the occlusal plane, and it can be used as a temporary or definitive treatment. The main advantages of this type of treatment are its simplicity, reversibility, and relatively low cost; however, further studies are needed to ensure the efficacy of this treatment option. © 2015 by the American College of Prosthodontists.

  10. [Stenting of subtotal conclusion of internal carotid artery and comparing the cerebral embolic load of proximal balloon protection device with distal filter protection device].

    Science.gov (United States)

    Yang, Qing-wei; Ji, Xun-ming; Li, Shen-mao; Zhu, Feng-shui; Chen, Yan-fei; Ye, Ming; Jiao, Li-qun

    2013-07-16

    To study the safety, efficacy and perioperative complications of endovascular therapy in the treatment of subtotal conclusion of internal carotid artery(ICA) in patients. To compare the cerebral embolic load of proximal balloon protection device versus distal filter protection device during the operation. Review all the operations of stenting for subtotal conclusion of ICA in Xuanwu hospital. New cerebral infarction after stenting was assessed by diffusion-weighted magnetic resonance imaging. Count the number of new ischemic lesions of every patient. 35 patients with subtotal conclusion of ICA received endovascular stenting. Proximal protective device was used for 21 patients. Distal protective device was used for 14 patients. All procedures succeeded. 32 patients received the cerebral MRI 1 week before and within 48 hours after the operation. Compared with filter protection(n = 14), proximal balloon device(n = 18) resulted in a significant reduction in the incidence of new cerebral infarction (6/18 vs 10/14, P = 0.03). The number of new cerebral ischemic lesions were significant reduced by proximal balloon device (1/18 vs 4/14, P = 0.0006) . There were no serious cardiovascular events in 35 patients during the operation and the following up 3 months. 3 patients had restenosis which was demonstrated by ultrasound of ICA at 3 months after stenting. Endovascular stenting may be a safe and valid method for the treatment of subtotal occlusion of ICA. For the stenting of subtotal occlusion of ICA, proximal balloon protection device as compared with filter protection may reduce the embolic load to the brain more effectively. The stenting of subtotal occlusion of ICA still needs the randomized trails to confirm the safety and validity.

  11. Single-balloon compared with double-balloon catheters for induction of labor: a randomized controlled trial.

    Science.gov (United States)

    Salim, Raed; Zafran, Noah; Nachum, Zohar; Garmi, Gali; Kraiem, Nazik; Shalev, Eliezer

    2011-07-01

    To estimate the efficacy of a single-balloon catheter compared with a double-balloon catheter among women with unfavorable cervices undergoing induction of labor. This prospective randomized study was conducted at a university teaching medical center between June 2008 and December 2010. Pregnant women admitted for induction of labor with a live singleton gestation in cephalic presentation with intact membranes and a Bishop score of 6 or less were randomly assigned for cervical ripening by a single-balloon catheter or a double-balloon catheter. The primary outcome was the length of time from catheter insertion until delivery. The secondary outcome was mode of delivery. Of 368 eligible women screened during the study period, 293 were included in the final analysis; 145 were randomly assigned to receive a single-balloon catheter and 148 received a double-balloon catheter. Demographic and obstetric parameters were comparable between the two groups. Length of time from catheter insertion until delivery was 19.4 (±6.0) and 19.1 (±6.8) hours among the single-balloon and the double-balloon catheter groups, respectively (P=.80). Length of time did not differ when primiparous women were analyzed separately. Incidence of cesarean delivery was 10.3% and 17.6% among the single-balloon and double-balloon catheter groups, respectively (P=.09). The incidence of either vacuum deliveries or cesarean deliveries was significantly lower among the single-balloon group (14.4%) compared with the double-balloon catheter group (25.7%; odds ratio 0.49, 95% confidence interval 0.26-0.92; P=.02). Both the single-balloon and double-balloon catheters are equally efficacious for inducing labor. The double-balloon catheter may be associated with more operative deliveries.

  12. Balloons in endovascular neurosurgery: history and current applications.

    Science.gov (United States)

    Alaraj, Ali; Wallace, Adam; Dashti, Reza; Patel, Prasad; Aletich, Victor

    2014-02-01

    The use of balloons in the field of neurosurgery is currently an essential part of our clinical practice. The field has evolved over the last 40 years since Serbinenko used balloons to test the feasibility of occluding cervical vessels for intracranial pathologies. Since that time, indications have expanded to include sacrificing cervical and intracranial vessels with detachable balloons, supporting the coil mass in wide-necked aneurysms (balloon remodeling technique), and performing intracranial and cervical angioplasty for atherosclerotic disease, as well as an adjunct to treat arteriovenous malformations. With the rapid expansion of endovascular technologies, it appears that the indications and uses for balloons will continue to expand. In this article, we review the history of balloons, the initial applications, the types of balloons available, and the current applications available for endovascular neurosurgeons.

  13. 40 CFR 264.553 - Temporary Units (TU).

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 25 2010-07-01 2010-07-01 false Temporary Units (TU). 264.553 Section... Provisions for Cleanup § 264.553 Temporary Units (TU). (a) For temporary tanks and container storage areas... Administrator may designate a unit at the facility, as a temporary unit. A temporary unit must be located within...

  14. Analysis of decrease in lung perfusion blood volume with occlusive and non-occlusive pulmonary embolisms

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, Yohei, E-mail: ypfranky1@ybb.ne.jp [Department of Radiology, Niigata University Graduate School of Medical and Dental Science (Japan); Yoshimura, Norihiko [Department of Radiology, Niigata University Graduate School of Medical and Dental Science (Japan); Hori, Yoshiro [Department of Radiology, Showa University Fujigaoka Hospital (Japan); Horii, Yosuke; Ishikawa, Hiroyuki [Department of Radiology, Niigata University Graduate School of Medical and Dental Science (Japan); Yamazaki, Motohiko [Department of Radiology, Niigata City General Hospital (Japan); Noto, Yoshiyuki [Department of Radiology, Niigata University Medical and Dental Hospital (Japan); Aoyama, Hidefumi [Department of Radiology, Niigata University Graduate School of Medical and Dental Science (Japan)

    2014-12-15

    Highlights: • The proportion of preserved PE lesions in the non-occlusive group was 76.7% (33/43). • HUs of the iodine map were significantly higher in the non-occlusive group than in the occlusive group. • There was no significant difference in HUs between the non-occlusive and corresponding normal group. - Abstract: Purpose: The aim of this study was to determine if lung perfusion blood volume (lung PBV) with non-occlusive pulmonary embolism (PE) differs quantitatively and visually from that with occlusive PE and to investigate if lung PBV with non-occlusive PE remains the same as that without PE. Materials and methods: Totally, 108 patients suspected of having acute PE underwent pulmonary dual-energy computed tomography angiography (DECTA) between April 2011 and January 2012. Presence of PE on DECTA was evaluated by one radiologist. Two radiologists visually evaluated the PE distribution (segmental or subsegmental) and its nature (occlusive or non-occlusive) on DECTA and classified perfusion in lung PBV as “decreased,” “slightly decreased,” and “preserved”. Two radiologists used a lung PBV application to set a region of interest (ROI) in the center of the lesion and measured HU values of an iodine map. In the same slice as the ROI of the lesion and close to the lesion, another ROI was set in the normal perfusion area without PE, and HUs were measured. The proportion of lesions was compared between the occlusive and non-occlusive groups. HUs were compared among the occlusive, non-occlusive, and corresponding normal groups. Results: Twenty-five patients had 80 segmental or subsegmental lesions. There were 37 and 43 lesions in the occlusive and non-occlusive groups, respectively. The proportion of decreased lesions was 73.0% (27/37) in the occlusive group, while that of preserved lesions in the non-occlusive group was 76.7% (33/43). There was a significant difference in the proportion of lesions (P < 0.001) between the two groups. HUs of the

  15. The prevalence of questionable occlusal caries

    DEFF Research Database (Denmark)

    Makhija, Sonia K; Gilbert, Gregg H; Funkhouser, Ellen

    2012-01-01

    Questionable occlusal caries (QOC) can be defined as clinically suspected caries with no cavitation or radiographic evidence of occlusal caries. To the authors' knowledge, no one has quantified the prevalence of QOC, so this quantification was the authors' objective in conducting this study...

  16. Dental occlusion and postural control in adults.

    Science.gov (United States)

    Tardieu, Corinne; Dumitrescu, Michel; Giraudeau, Anne; Blanc, Jean-Luc; Cheynet, François; Borel, Liliane

    2009-01-30

    We studied the influence of a dental occlusion perturbation on postural control. The tests were performed in three dental occlusion conditions: (Rest Position: no dental contact, Maximal Intercuspal Occlusion: maximal dental contact, and Thwarted Laterality Occlusion: simulation of a dental malocclusion) and four postural conditions: static (stable platform) and dynamic (unstable platform), with eyes open and eyes closed. A decay of postural control was noted between the Rest Position and Thwarted Laterality Occlusion conditions with regard to average speed and power indexes in dynamic conditions and with eyes closed. However, the head position and stabilization were not different from those in the other experimental conditions, which means that the same functional goal was reached with an increase in the total energetic cost. This work shows that dental occlusion differently affects postural control, depending on the static or dynamic conditions. Indeed, dental occlusion impaired postural control only in dynamic postural conditions and in absence of visual cues. The sensory information linked to the dental occlusion comes into effect only during difficult postural tasks and its importance grows as the other sensory cues become scarce.

  17. An engineering analysis of dental occlusion principles.

    Science.gov (United States)

    Katona, Thomas R

    2009-06-01

    The purpose of this study was to develop an analytical model of contacting teeth, based on principles of basic engineering statics. The model would be used to demonstrate the interactions between occlusal contacts and tooth loading (forces and moments) and to critique occlusion-related dogma. Free-body diagrams were drawn to depict 2 teeth in occlusal contact. In combination with the concept of the center of resistance, the governing equilibrium equations were derived and used to solve for the forces and moments on the teeth and to investigate the influences of tripod and cusp-fossa occlusal schemes. With a specific load on a tooth, it was demonstrated that the load on the opposing tooth and the concomitant occlusal scheme dictated crown-crown contact forces that can be computed. This engineering analysis suggests flaws in widely held notions about the mechanics of occlusion. Loading that is generally considered clinically desirable is certain to produce undesirable loading on the opposing tooth. The complex relationships between the loads on teeth and crown-crown occlusal contacts make it virtually impossible to control tooth loading with occlusal equilibration. For computational and conceptual reasons, it is essential to consider the center of resistance.

  18. Occlusion on oral implants: current clinical guidelines.

    Science.gov (United States)

    Koyano, K; Esaki, D

    2015-02-01

    Proper implant occlusion is essential for adequate oral function and the prevention of adverse consequences, such as implant overloading. Dental implants are thought to be more prone to occlusal overloading than natural teeth because of the loss of the periodontal ligament, which provides shock absorption and periodontal mechanoreceptors, which provide tactile sensitivity and proprioceptive motion feedback. Although many guidelines and theories on implant occlusion have been proposed, few have provided strong supportive evidence. Thus, we performed a narrative literature review to ascertain the influence of implant occlusion on the occurrence of complications of implant treatment and discuss the clinical considerations focused on the overloading factors at present. The search terms were 'dental implant', 'dental implantation', 'dental occlusion' and 'dental prosthesis'. The inclusion criteria were literature published in English up to September 2013. Randomised controlled trials (RCTs), prospective cohort studies and case-control studies with at least 20 cases and 12 months follow-up interval were included. Based on the selected literature, this review explores factors related to the implant prosthesis (cantilever, crown/implant ratio, premature contact, occlusal scheme, implant-abutment connection, splinting implants and tooth-implant connection) and other considerations, such as the number, diameter, length and angulation of implants. Over 700 abstracts were reviewed, from which more than 30 manuscripts were included. We found insufficient evidence to establish firm clinical guidelines for implant occlusion. To discuss the ideal occlusion for implants, further well-designed RCTs are required in the future. © 2014 John Wiley & Sons Ltd.

  19. Aortoiliac occlusive disease masquerading as cerebrovascular accident

    Directory of Open Access Journals (Sweden)

    Nandeesh B

    2007-01-01

    Full Text Available Acute aortoiliac occlusion is an unusual but potentially catastrophic condition causing acute limb ischemia and associated with early and high rates of mortality and morbidity. It is caused by either embolic occlusion of the infra renal aorta at the bifurcation or beyond or thrombosis of the abdominal aorta and its large terminal branches. Neurological symptoms are rare manifestation of acute aortoiliac occlusion and when neurological symptoms predominate, patients are mistakenly considered to have cerebrovascular event. We present a 60-year-old man with atherosclerotic thrombotic occlusion of the left common iliac artery causing acute painful monoplegia. We mistook the acute monoplegia due to acute limb ischemia for cerebrovascular accident. Pathologic examination revealed a firm thrombus occluding the origin of left common iliac artery and extending along the length of the vessel. Acute aortic iliac occlusion can masquerade as a cerebrovascular stroke and a thorough clinical evaluation and imaging studies allow early diagnosis and instituting life-saving treatment timely.

  20. A controversy with respect to occlusion

    Directory of Open Access Journals (Sweden)

    Shunji Fukushima, DDS, PhD

    2016-08-01

    Full Text Available There are very little controversies on occlusion in healthy individuals, where centric relation is regarded as the criterion for assessing the present occlusion and also for establishing a new occlusal relationship between the upper and the lower jaws. On the other hand, the occlusal position in patients with deformed condyles still remains to be clarified. In this review, the effectiveness and limits of centric relation in these patients are discussed. In addition, the muscle induced occlusal positions, such as the muscular position and the terminal positions of habitual closing movements, are suggested as a substitution for centric relation. Finally, the importance of a stable intercuspal position, where the habitual closing movements terminate without any premature tooth contact, is emphasized.

  1. [Occlusion, mandibular position and orthodontic treatment].

    Science.gov (United States)

    Bai, Ding; Han, Xianglong

    2013-08-01

    One of the ultimate goals for orthodontic treatment is to establish an esthetic, healthy, stable and efficient occlusion. Currently, however, most of the criteria are limited to static occlusion, with little attention to dynamic occlusion. During the therapy, the orthodontists may sometimes find the maximum intercuspation (MI) is remarkably inconsistent with the centric relation (CR), or the mandibular positions are different before and after the therapy. These definitely will influence the stability of the treatment, or even the health of temporomandibular joint (TMJ) and stomatognathic system. The functional occlusion theory emphasizes that the displacement of TMJ in the glenoid fossa is the reason for the inharmony between MI and CR, and the relapse. What is more, this theory also gives the orthodontists the ways to evaluate the relationships among the MI, CR and TMJ. In this paper, we will introduce the contents and methods of the functional occlusion theory.

  2. A controversy with respect to occlusion.

    Science.gov (United States)

    Fukushima, Shunji

    2016-08-01

    There are very little controversies on occlusion in healthy individuals, where centric relation is regarded as the criterion for assessing the present occlusion and also for establishing a new occlusal relationship between the upper and the lower jaws. On the other hand, the occlusal position in patients with deformed condyles still remains to be clarified. In this review, the effectiveness and limits of centric relation in these patients are discussed. In addition, the muscle induced occlusal positions, such as the muscular position and the terminal positions of habitual closing movements, are suggested as a substitution for centric relation. Finally, the importance of a stable intercuspal position, where the habitual closing movements terminate without any premature tooth contact, is emphasized.

  3. Lessons learnt from experimental temporary octopus fishing ...

    African Journals Online (AJOL)

    This paper presents evidence of the fisheries effect of experimental temporary fishing closures for Octopus in the then-emergent Velondriake Locally Managed Marine Area (LMMA) in south-west Madagascar during 2004–2006. We present an analysis of the O. cyanea catch data for the first two years of temporary closures ...

  4. Diversity patterns of temporary wetland macroinvertebrate ...

    African Journals Online (AJOL)

    Although macroinvertebrates are potentially useful for assessing the condition of temporary wetlands, little is yet known about them. Macroinvertebrate assemblages were assessed in 138 temporary wetlands in the south-western Cape, recording 126 taxa. However, predicted richness estimates were all higher than the ...

  5. Percutaneous Mitral Valve Dilatation: Single Balloon versus Double Balloon - A Finite Element Study

    Energy Technology Data Exchange (ETDEWEB)

    Schievano, Silvia; Kunzelman, Karyn; Nicosia, Mark; Cochran, R. P.; Einstein, Daniel R.; Khambadkone, Sachin; Bonheoffer, Philipp

    2009-01-01

    Background: Percutaneous mitral valve (MV) dilatation is performed with either a single balloon (SB) or double balloon (DB) technique. The aim of this study was to compare the two balloon system results using the finite element (FE) method. Methods and Results: An established FE model of the MV was modified by fusing the MV leaflet edges at commissure level to simulate a stenotic valve (orifice area=180mm2). A FE model of a 30mm SB (low-pressure, elastomeric balloon) and an 18mm DB system (high-pressure, non-elastic balloon) was created. Both SB and DB simulations resulted in splitting of the commissures and subsequent stenosis dilatation (final MV area=610mm2 and 560mm2 respectively). Stresses induced by the two balloon systems varied across the valve. At the end of inflation, SB showed higher stresses in the central part of the leaflets and at the commissures compared to DB simulation, which demonstrated a more uniform stress distribution. The higher stresses in the SB analysis were due to the mismatch of the round balloon shape with the oval mitral orifice. The commissural split was not easily accomplished with the SB due to its high compliance. The high pressure applied to the DB guaranteed the commissural split even when high forces were required to break the commissure welds. Conclusions: The FE model demonstrated that MV dilatation can be accomplished by both SB and DB techniques. However, the DB method resulted in higher probability of splitting of the fused commissures and less damage caused to the MV leaflets by overstretching.

  6. Occlusion for stimulus deprivation amblyopia

    Science.gov (United States)

    Antonio-Santos, Aileen; Vedula, Satyanarayana S; Hatt, Sarah R; Powell, Christine

    2014-01-01

    Background Stimulus deprivation amblyopia (SDA) develops due to an obstruction to the passage of light secondary to a condition such as cataract. The obstruction prevents formation of a clear image on the retina. SDA can be resistant to treatment, leading to poor visual prognosis. SDA probably constitutes less than 3% of all amblyopia cases, although precise estimates of prevalence are unknown. In developed countries, most patients present under the age of one year; in less developed parts of the world patients are likely to be older at the time of presentation. The mainstay of treatment is removal of the cataract and then occlusion of the better-seeing eye, but regimens vary, can be difficult to execute, and traditionally are believed to lead to disappointing results. Objectives Our objective was to evaluate the effectiveness of occlusion therapy for SDA in an attempt to establish realistic treatment outcomes. Where data were available, we also planned to examine evidence of any dose response effect and to assess the effect of the duration, severity, and causative factor on the size and direction of the treatment effect. Search methods We searched CENTRAL (which contains the Cochrane Eyes and Vision Group Trials Register) (The Cochrane Library 2013, Issue 9), Ovid MEDLINE, Ovid MEDLINE In-Process and Other Non-Indexed Citations, Ovid MEDLINE Daily, Ovid OLDMEDLINE (January 1946 to October 2013), EMBASE (January 1980 to October 2013), the Latin American and Caribbean Literature on Health Sciences (LILACS) (January 1982 to October 2013), PubMed (January 1946 to October 2013), the metaRegister of Controlled Trials (mRCT) (www.controlled-trials.com), ClinicalTrials.gov (www.clinicaltrials.gov) and the WHO International Clinical Trials Registry Platform (ICTRP) (www.who.int/ictrp/search/en). We did not use any date or language restrictions in the electronic searches for trials. We last searched the electronic databases on 28 October 2013. Selection criteria We planned

  7. Special report: Occlusive cuff controller

    Science.gov (United States)

    Baker, J. T.

    1975-01-01

    A mechanical occlusive cuff controller suitable for blood flow experiments in space shuttle flights is described. The device requires 115 volt ac power and a pressurized gas source. Two occluding cuff pressures (30 and 50 mmHg) are selectable by a switch on the front panel. A screw driver adjustment allows accurate cuff pressurization levels for under or oversized limbs. Two pressurization cycles (20 second and 2 minutes) can be selected by a front panel switch. Adjustment of the timing cycles is also available through the front panel. A pushbutton hand switch allows remote start of the cuff inflation cycle. A stop/reset switch permits early termination of the cycle and disabling of the controller to prevent inadvertent reactivation. Pressure in the cuff is monitored by a differential aneroid barometer. In addition, an electrocardiogram trigger circuit permits the initiation of the pressurization cycle by an externally supplied ECG cycle.

  8. [Informed consent in the intragastric balloon supported by SENPE, SEEDO, SEN and SECO: legal aspects].

    Science.gov (United States)

    Abilés, V; Martínez Olmos, M A; Escartí, M A; Bretón, I; Cáncer, E; Pelaez, N; Álvarez, V; Culebras, J M; Mazure, R A

    2012-01-01

    Intra-gastric balloon (IGB) is an invasive, temporary, non-surgical technique for the treatment of obesity. Its outcomes mainly depend on the patient's collaboration. The aim was to adapt the informed consent used for bariatric surgery to a method that has especial characteristics. We used the informed consent proposed by ASAC for bariatric surgery and 8 statements related to IGB included in the WESTLAW ES database. The review of the statements defines the IGB treatment as a curative-intended and non-satisfactive therapy with an obligation of the means used, but not the outcomes, by the treating physician. Moreover, the obligations of providing a correct and complete information -which includes the dietary regime- should be observed, as well as the possible therapeutic alternatives and finally, the proceeding used should be in written. The informed consent is a medico-legal document which content should consider the latest jurisprudence on the minimally invasive techniques for the treatment of obesity.

  9. The predictive power of balloon shape and change of sensory functions on outcome of percutaneous balloon compression for trigeminal neuralgia.

    Science.gov (United States)

    Asplund, Pär; Linderoth, Bengt; Bergenheim, A Tommy

    2010-09-01

    Percutaneous balloon compression is a simple and effective treatment of trigeminal neuralgia. However, results between and within different series are varying. To further improve the results in terms of pain relief, the authors believe that a careful study of the surgical procedure is important. The object of this study was to analyze the impact of balloon shape, balloon position, balloon volume, and compression time on duration of the therapeutic effect following percutaneous balloon compression. Furthermore, they analyzed the sensory side effects associated with this treatment, and how these relate to surgical parameters. Medical records and intraoperative radiographs from 87 balloon compressions were reviewed, and different surgical parameters were categorized. Univariate and multivariate analyses were performed to correlate surgical parameters to pain relief. Sensory testing with a transcutaneous electrical stimulation technique and clinical examination data were reviewed to analyze changes in sensory function. The balloon shape had a significant impact on time to recurrence of pain. A pear-shaped balloon resulted in a far better surgical result than a non-pear-shaped balloon (p pear shape was not significant (p = 0.14). Statistical significance was not reached for any of the other parameters in relation to duration of therapeutic effect. A pear-shaped balloon was also significantly associated with increased thresholds for percutaneous electrical stimulation in the immediate postoperative period, but the perception thresholds were normalized at the late follow-up at 3-9 months. A similar outcome was found for clinical testing with light touch and pinprick. The authors have demonstrated that using a pear-shaped balloon when performing percutaneous balloon compression for trigeminal neuralgia results in longer pain relief than non-pear-shaped balloons. Other surgical parameters seemed less important with respect to pain relief. Balloon compression also, in many

  10. Endovascular Management of an Infected Superficial Femoral Artery Pseudoaneurysm

    Energy Technology Data Exchange (ETDEWEB)

    Damodharan, Karthik, E-mail: drdkarthik@hotmail.com; Beckett, David [Royal Bournemouth Hospital (United Kingdom)

    2013-10-15

    This article describes an endovascular technique of treating an infected pseudoaneurysm by direct thrombin injection via a catheter placed inside the aneurysm sac while maintaining temporary balloon occlusion of the neck of the false aneurysm.

  11. After the sunset: the residual effect of temporary legislation

    NARCIS (Netherlands)

    F.J. Fagan (Frank)

    2013-01-01

    textabstractThe difference between permanent legislation and temporary legislation is the default rule of termination: permanent legislation governs perpetually, while temporary legislation governs for a limited time. Recent literature on legislative timing rules considers the effect of temporary

  12. Efficacy and safety of balloon-occluded retrograde transvenous obliteration with sodium tetradecyl sulfate liquid sclerotherapy

    Energy Technology Data Exchange (ETDEWEB)

    Chang, Il Soo; Park, Sang Woo; Kwon, So Young; Cheo, Won Hyeok; Cheon, Young Koog; Shim, Chan Sup; Lee, Tae Yoon; Kim, Jeong Han [Digestive Disease Center, Konkuk University School of Medicine, Seoul (Korea, Republic of)

    2016-04-15

    To evaluate the efficacy and safety of balloon-occluded retrograde transvenous obliteration (BRTO) with sodium tetradecyl sulfate (STS) liquid sclerotherapy of gastric varices. Between February 2012 and August 2014, STS liquid sclerotherapy was performed in 17 consecutive patients (male:female = 8:9; mean age 58.6 years, range 44-86 years) with gastric varices. Retrograde venography was performed after occlusion of the gastrorenal shunt using a balloon catheter and embolization of collateral draining veins using coils or gelfoam pledgets, to evaluate the anatomy of the gastric varices. We prepared 2% liquid STS by mixing 3% STS and contrast media in a ratio of 2:1. A 2% STS solution was injected into the gastric varices until minimal filling of the afferent portal vein branch was observed (mean 19.9 mL, range 6-33 mL). Patients were followed up using computed tomography (CT) or endoscopy. Technical success was achieved in 16 of 17 patients (94.1%). The procedure failed in one patient because the shunt could not be occluded due to the large diameter of gastrorenal shunt. Complete obliteration of gastric varices was observed in 15 of 16 patients (93.8%) with follow-up CT or endoscopy. There was no rebleeding after the procedure. There was no procedure-related mortality. BRTO using STS liquid can be a safe and useful treatment option in patients with gastric varices.

  13. Laparoscopic hepatectomy combined with endoscopic papillary balloon dilation for complex bile duct stones.

    Science.gov (United States)

    Yang, Jian; Zhang, Fabiao; Du, Xuefeng; Wang, Aidong; Lv, Shangdong; Fang, Zheping

    2017-08-13

    We evaluated the feasibility and efficacy of laparoscopic hepatectomy (LH) combined with endoscopic papillary balloon dilation (EPBD) for removing intra- and extrahepatic bile duct stones. A total of 26 patients with intra- and extrahepatic bile duct stones underwent LH and EPBD. Selective hemi-hepatic vascular occlusion was used to complete the LH. EPBD was performed under the guidance of a guidewire, and stones were removed with a stone basket or balloon. A one-stage LH with EPBD lithotomy was successfully performed in 26 cases. No residual bile duct stones, intestinal or bile duct perforations were found. In addition, no severe post-operative bleeding, severe pancreatitis or mortality occurred. Post-operative hyperamylasemia was observed in five cases and bile leakage in one case. Post-operative hospital stays lasted 7-11 days. LH combined with EPBD applied to intra- and extrahepatic bile duct stones was feasible, effective and safe, resulting in rapid recovery and few post-operative complications. © 2017 Royal Australasian College of Surgeons.

  14. Unconventional Ballooning Structures for Toroidal Drift Waves

    OpenAIRE

    Xie, H. S.; Xiao, Y.

    2015-01-01

    With strong gradients in the pedestal of high confinement mode (H-mode) fusion plasmas, gyrokinetic simulations are carried out for the trapped electron and ion temperature gradient modes. A broad class of unconventional mode structures is found to localize at arbitrary poloidal positions or with multiple peaks. It is found that these unconventional ballooning structures are associated with different eigen states for the most unstable mode. At weak gradient (low confinement mode or L-mode), t...

  15. Science behind the scenes during Fossett's recent around-the-world ballooning effort

    Science.gov (United States)

    Showstack, Randy

    “In my mind, there's no question. If you eliminate that one temporary setback, he completes the global,” Bob Rice said on August 17, exhausted after having slept little during the previous 8 ½ days of intensive weather forecasting and emotional roller coaster riding.As chief meteorologist for the Solo Spirit balloon trip, Rice helped to navigate 54-yearold balloonist and businessman Steve Fossett on his fourth attempt to circle the globe nonstop. During that effort, which began at 23:30 UTC on August 7 from Mendoza, Argentina, Fossett had floated 24,460 km—63% of the way around the world longitudinally-surpassing his previous world distance record of 16,674 km set in January 1997. His “roziere” balloon, a combination of gas and hot air, had risen or descended to avoid violent weather systems and winds that would blow him in the wrong direction, and to catch air currents that would push his vessel along. With the Atlantic and Indian Oceans and Australia behind him, only the wide Pacific Ocean lay in Fossett's path.

  16. [Clinical treatment of occlusion in implant therapy].

    Science.gov (United States)

    Nakamura, Kimio

    2008-01-01

    A firmly established theory on occlusion, even with natural teeth, has been all but absent throughout history. it is even more difficult to find and evidence-based concept of occlusion for the relatively new field of implantology. Since i harbored doubts on initial gnathological theories of occlusion decades ago, my work in treating occlusion in patients with temporomandibular arthrosis has brought me to the realization that the diagnosis and adjustment of the alignment or misalignment of the light guide tapping position ( LGTP ) and clenching position (CLP) in the stable condylar position are important focal points for clinical occlusion. I have therefore striven for the seamless incorporation of the prosthodontic techniques of maintaining, correcting, and restoring occlusion into my day to day clinical practice, which includes periodontal treatment and orthodontics. Implantology has now been added to this context, and i feel there is no need to take a drastically different approach to creating and adjusting implant occlusion. I will present actual case reports and post operative observations of patients who received implant therapy in our clinic.

  17. Report on the Brazilian Scientific Balloon Program

    Science.gov (United States)

    Braga, Joao

    2016-07-01

    We report on the recent scientific ballooning activities in Brazil, and present the plans for the next few years. Recent technological developments, especially on telecommunications and gondola attitude control systems will be reported. We also present the recent progress achieved in the development of the protoMIRAX balloon experiment. protoMIRAX is a balloon-borne hard X-ray imaging telescope under development at INPE as a pathfinder for the MIRAX (Monitor e Imageador de Raios X) satellite mission. The experiment consists essentially in a hard X-ray coded-aperture imager to operate in the 20-200 keV energy range. The detector plane is a square array of 196 10mm x 10mm x 2mm CdZnTe (CZT) planar detectors. A collimator defines a fully-coded field-of-view of 20 x 20 degrees, with 7 x 7 degrees of full sensitivity and an angular resolution of 1.7 degrees. We describe the final stages of development and testing of the front-end electronics, with charge preamplifiers, LNAs, shapers and Wilkinson-type ADCs customized for these detectors. We also show detailed Monte Carlo simulations of the flight background and the expected flight images of bright sources performed with the use of GEANT4.

  18. Intragastric balloon for treatment-resistant obesity: safety, tolerance, and efficacy of 1-year balloon treatment followed by a 1-year balloon-free follow-up

    NARCIS (Netherlands)

    Mathus-Vliegen, Elisabeth M. H.; Tytgat, Guido N. J.

    2005-01-01

    Background: Prior efforts to treat obesity with intragastric balloons were thwarted by high complication rates. Therefore, fundamental requirements for optimal balloon designs were defined. The aim of the present study was to investigate the effectiveness, the safety; and the tolerance of a new

  19. ISBA system for CNES operations of stratospheric balloons

    Science.gov (United States)

    Vargas, André; Cocquerez, Philippe; Escarnot, Jean-Pierre; Sosa-Sesma, Sergio; Ragazzo, Patrick; Spel, Martin

    For long duration flights of stratospheric balloons, the CNES has developed the ISBA Tracking, Telemetry Command system (TT and C), which comprises a house-keeping gondola (on board aerostat) and associated ground segments. The ISBA TT and C system permits to control and to monitor stratospheric balloons for long duration flights lasting a few days (zero-pressure balloon) to several months (superpressure balloon), flying anywhere in the world. This system has been implemented for scientific balloon campaigns : African Monsoon Multidisciplinary Analyzes (AMMA 2006) and Pacific Asian Regional Campaign (PARC 2008). The next balloon campaign with this system will be Concordiasi (2010 ), during which 20 superpressure balloons will be launched from the U.S. MacMurdo station (placeAntarctica) where the duration of the balloon flights are expected to reach 6 months. To enable monitoring and controlling of the flights in real time, regardless of the location of the balloons, the Iridium system is used as the communication link between the ground stations and the on-board house-keeping gondola. A mobile Control Station is activated on the balloon operation site for the launch, from where the ascent to flight level and the beginning of the flight is controlled by the team in charge of launching operations. Subsequently after checking the good health of the aerostat (balloon itself and house keeping gondola), the flight control of the balloon is transferred to the Control Center installed in the CNES at Toulouse from where the flight is further controlled : checking housekeeping and scientific telemetries, operations of ballast dropping and helium gas exhausting (superpressure balloons), monitoring the health of the balloon and the house keeping gondola, forecasts extensions of balloon trajectories for the 10 days to come, and management of the end of the flight to ensure a descent of the envelope of the balloon and flight train with its parachute in maximum safety conditions

  20. Excimer laser-assisted recanalisation of femoral arterial stenosis or occlusion caused by the use of Angio-Seal

    Energy Technology Data Exchange (ETDEWEB)

    Steinkamp, H.J.; Werk, M.; Beck, A.; Teichgraeber, U.; Haufe, M.; Felix, R. [Dept. of Radiology, Humboldt Univ. Berlin (Germany)

    2001-08-01

    The aim of this study was to demonstrate the effect of excimer laser and balloon angioplasty of femoral artery stenosis and occlusion after use of a haemostatic puncture closure device. A haemostatic puncture closure device (Angio-Seal) was used in 6000 patients after diagnostic or therapeutic artery catheterisation. In 34 of those patients symptoms of peripheral artery disease occurred. Sixteen of those 34 cases were transferred to our clinic for excimer laser angioplasty. All 16 patients presented with symptoms of acute peripheral artery disease within 1-14 days: superficial femoral artery (SFA) occlusions (4 cases); superficial femoral artery stenosis (3 cases); high-grade stenosis of the common femoral artery (CFA; 3 cases); high-grade stenosis of CFA; SFA and profund femoral artery (PFA; 3 cases); and occlusions of CFA, SFA and PFA (3 cases). Before any procedure was performed, informed consent was given by the patient, which included the use of the Angio-Seal closure device. Every patient who had to undergo recanalisation procedures gave additional informed consent which especially included the usage of the excimer laser for recanalisation. A measurement of the walking distance, ankle-brachial systolic pressure index (ABI) and diagnostic angiography was performed in 13 cases before and immediate after as well as 3 and 6 months after therapeutic percutaneous transluminal laser angioplasty followed by balloon angioplasty (PTLA/PTA). In 3 patients the risks of PTLA/PTA was considered too high; those patients underwent surgical repair. Angiographic and clinical improvement was achieved in 13 of 13 patients. The mean walking distance increased from 81 to >400 m. The average ankle-brachial systolic pressure index (ABI) increased from 0.47 to 0.84. One patient developed a dissection of the SFA, and in 1 case a peripheral embolisation was seen. The PTLA/PTA technique is a successful therapeutic option for patients with femoral artery occlusion or high-grade stenosis

  1. Transjugular Intrahepatic Portosystemic Shunt Flow Reduction with Adjustable Polytetrafluoroethylene-Covered Balloon-Expandable Stents Using the "Sheath Control" Technique.

    Science.gov (United States)

    Blue, Robert C; Lo, Grace C; Kim, Edward; Patel, Rahul S; Scott Nowakowski, F; Lookstein, Robert A; Fischman, Aaron M

    2016-06-01

    A complication of transjugular intrahepatic portosystemic shunts (TIPS) placement is refractory portosystemic encephalopathy (PSE) often requiring TIPS reduction. We report the results of a "sheath control technique" utilizing constraining sheaths during deployment of polytetrafluoroethylene (PTFE)-covered balloon-expandable stents, minimizing stent migration, and providing additional procedural control. TIPS reduction was performed in 10 consecutive patients for PSE using Atrium iCast covered stents (Atrium Maquet Getinge Group, Germany). Within the indwelling TIPS stent, a 9 mm × 59 mm iCast stent was deployed with 2 cm exposed from the sheath's distal end and the majority of the stent within the sheath to create the distal hourglass shape. During balloon retraction, the stent was buttressed by the sheath. The proximal portion of the stent was angioplastied to complete the hourglass configuration, and the central portion of the stent was dilated to 5 mm. Demographics, pre- and post-procedure laboratory values, and outcomes were recorded. Ten patients underwent TIPS reduction with 100 % technical success. There was no stent migration during stent deployment. All patients experienced initial improvement of encephalopathy. One patient ultimately required complete TIPS occlusion for refractory PSE, and another developed TIPS occlusion 36 days post-procedure. There was no significant trend toward change in patients' MELD scores immediately post-procedure or at 30 days (p = 0.46, p = 0.47, respectively). TIPS reduction using Atrium iCast PTFE balloon-expandable stents using the "sheath control technique" is safe and effective, and minimizes the risk of stent migration.

  2. Randomized Trial of the SMART Stent versus Balloon Angioplasty in Long Superficial Femoral Artery Lesions: The SUPER Study

    Energy Technology Data Exchange (ETDEWEB)

    Chalmers, Nicholas, E-mail: nicholas.chalmers@cmft.nhs.uk [Manchester Royal Infirmary, Department of Radiology (United Kingdom); Walker, Paul T. [James Cook University Hospital, Department of Radiology (United Kingdom); Belli, Anna-Maria [St. George' s Healthcare NHS Trust, Department of Radiology (United Kingdom); Thorpe, Anthony P. [Aberdeen Royal Infirmary, Department of Radiology (United Kingdom); Sidhu, Paul S. [King' s College Hospital, Department of Radiology (United Kingdom); Robinson, Graham [Hull Royal Infirmary, Department of Radiology (United Kingdom); Ransbeeck, Mariella van [Johnson and Johnson Medical NV/SA, Cordis (Belgium); Fearn, Steven A. [Johnson and Johnson Medical Ltd., Cordis (United Kingdom)

    2013-04-15

    To determine whether primary stenting reduces the rate of restenosis compared with balloon angioplasty alone in the endovascular treatment of long superficial femoral artery lesions; and to assess the effect of treatment on quality of life. A total of 150 patients with superior femoral artery occlusion or severe stenosis of 5-22 cm length from 17 UK centers were randomized to either primary stenting with the SMART stent or balloon angioplasty (i.e., percutaneous transluminal angioplasty, PTA). Bailout stent placement was permitted in case of inadequate result from PTA. The primary end point was restenosis measured by duplex ultrasound at 1 year. Quality-of-life assessments were performed by the EuroQol (EQ)-5D questionnaire. Mean lesion length was 123.0 mm in the stent group and 116.8 mm in the PTA group. A total of 140 (93.3 %) of 150 had total occlusions. At 12 months' follow-up, restenosis measured by Duplex ultrasound was not significantly different between the stent and PTA groups by intention-to-treat or as-treated analyses: 47.2 versus 43.5 % (p = 0.84) and 40.8 versus 46.7 % (p = 0.68), respectively. There were fewer target lesion revascularizations in patients randomized to stenting, but this did not reach statistical significance (12.5 vs. 20.8 %, p = 0.26). There was no difference in the rate of amputation. Patients in both groups reported improved quality of life. Primary stenting of long lesions in predominantly occluded superficial femoral arteries does not reduce the rate of binary restenosis compared with balloon angioplasty and bailout stenting. Both treatment strategies conferred a meaningful and sustained improvement to the quality of life of patients with severe superficial femoral artery disease.

  3. Cutting balloons, covered stents and paclitaxel-coated balloons for the treatment of dysfunctional dialysis access.

    Science.gov (United States)

    Kitrou, Panagiotis; Spiliopoulos, Stavros; Karnabatidis, Dimitris; Katsanos, Konstantinos

    2016-12-01

    Percutaneous transcatheter balloon angioplasty has evolved to the current mainstay treatment for salvage of dysfunctional dialysis access. Nonetheless, it is frequently associated with recurrent vessel restenosis and the need for multiple repeat treatments in order to maintain hemodynamic patency. Cutting-balloons, covered stents or stent-grafts, and paclitaxel-coated balloons have been extensively tested and investigated with the aim to improve immediate anatomical and long-term clinical results. Areas covered: In the present overview, we discuss the background and appraise relevant medical literature on the aforementioned technologies and provide a more in-depth synthesis of the results of different clinical studies for each device category. We will also discuss the limitations in the mode of action of each group of devices and envision what the future holds for the challenging field of dialysis access interventions. Expert commentary: We propose a good practice algorithm for the treatment of thrombosed or dysfunctional dialysis access.

  4. Balloon kyphoplasty: an evidence-based analysis.

    Science.gov (United States)

    2004-01-01

    To review the evidence on the effectiveness and cost-effectiveness of balloon kyphoplasty for the treatment of vertebral compression fractures (VCFs). Vertebral compression fractures are one of the most common types of osteoporotic fractures. They can lead to chronic pain and spinal deformity. They are caused when the vertebral body (the thick block of bone at the front of each vertebra) is too weak to support the loads of activities of daily living. Spinal deformity due to a collapsed vertebral body can substantially affect the quality of life of elderly people, who are especially at risk for osteoporotic fractures due to decreasing bone mass with age. A population-based study across 12 European centres recently found that VCFs have a negative impact on health-related quality of life. Complications associated with VCFs are pulmonary dysfunction, eating disorders, loss of independence, and mental status change due to pain and the use of medications. Osteoporotic VCFs also are associated with a higher rate of death. VCFs affect an estimated 25% of women over age 50 years and 40% of women over age 80 years. Only about 30% of these fractures are diagnosed in clinical practice. A Canadian multicentre osteoporosis study reported on the prevalence of vertebral deformity in Canada in people over 50 years of age. To define the limit of normality, they plotted a normal distribution, including mean and standard deviations (SDs) derived from a reference population without any deformity. They reported a prevalence rate of 23.5% in women and a rate of 21.5% in men, using 3 SDs from the mean as the limit of normality. When they used 4 SDs, the prevalence was 9.3% and 7.3%, respectively. They also found the prevalence of vertebral deformity increased with age. For people older than 80 years of age, the prevalence for women and men was 45% and 36%, respectively, using 3 SDs as the limit of normality. About 85% of VCFs are due to primary osteoporosis. Secondary osteoporosis and

  5. Pneumatic impression: Improving dental arch impression with an inflatable balloon

    OpenAIRE

    Lokendra Gupta

    2016-01-01

    Purpose: The purpose of this impression technique is to overcome the problem associated with restricted mouth opening in association with high arched palate by employing pneumatic impression technique using latex balloon. Methods: A stock tray was modified with auto polymerizing acrylic resin. On the modified tray, a latex balloon was attached with aid of cyanoacrylate. The outlet of the balloon was then connected to a clinical sphygmomanometer bulb with the rubber pipe for air passage whi...

  6. Radial dilation of nephrostomy balloons: a comparative analysis

    Directory of Open Access Journals (Sweden)

    Kari Hendlin

    2008-10-01

    Full Text Available PURPOSE: The dynamics of percutaneous balloon expansion may differ with increasing extrinsic compressive forces and increasing inflation pressures. This study compares the ability of percutaneous balloons to expand under different radial constrictive forces. MATERIALS AND METHODS: Three 30F nephrostomy balloons were tested: Bard X-Force™, Boston Scientific Microvasive Amplatz Tractmaster™, and Cook Ultraxx™. With a super stiff guidewire in place, the balloon tip was secured by elevated vice grips on either side of the balloon. A string was wrapped around the balloon center once, and incremental increases in load were added (2g, 42g, 82g, and 122g to represent increasing extrinsic compression. The balloon was inflated with a contrast agent and circumference changes were measured at increments of 4 ATM, 10 ATM, and burst pressure. Balloons were tested in triplicate for each load. RESULTS: All balloons were unable to reach 90% of their expected diameter with larger constrictive loads (122g at low (4 ATM and nominal (10 ATM inflation pressures. Only the Bard and Cook balloons reached at least 90% of the expected diameter with a coefficient of variance (CV less than 10% at burst pressure under the larger constrictive load (122g, 94.3% ± 6.7%, CV 7.1% and 96.3% ± 2.9%, CV 3.0% respectively. All balloons performed well under low constriction forces and reached at least 80% of the expected diameter by 10 ATM under all constrictive loads. CONCLUSIONS: The Bard X-Force and Cook Ultraxx percutaneous nephrostomy balloons achieved the most reliable radial dilation against large constrictive forces simulating fascial or retroperitoneal scar tissue.

  7. Coronary artery aneurysm following drug-coated balloon treatment.

    Science.gov (United States)

    Solomonica, Amir; Musallam, Anees; Roguin, Ariel

    2015-12-01

    Drug-coated balloons are an effective treatment option for stent restenosis. Because of their potential benefits, the use of drug-coated balloons is predicted to increase in the future and expand further for the treatment of de novo lesions as well. We hereby present a case in which a patient developed a coronary artery aneurysm following the treatment of a de novo native coronary narrowing with a drug-coated balloon. Copyright © 2015 Elsevier Inc. All rights reserved.

  8. Radial dilation of nephrostomy balloons: a comparative analysis.

    Science.gov (United States)

    Hendlin, Kari; Monga, Manoj

    2008-01-01

    The dynamics of percutaneous balloon expansion may differ with increasing extrinsic compressive forces and increasing inflation pressures. This study compares the ability of percutaneous balloons to expand under different radial constrictive forces. Three 30F nephrostomy balloons were tested: Bard X-Force, Boston Scientific Microvasive Amplatz Tractmaster, and Cook Ultraxx. With a super stiff guidewire in place, the balloon tip was secured by elevated vice grips on either side of the balloon. A string was wrapped around the balloon center once, and incremental increases in load were added (2g, 42g, 82g, and 122g) to represent increasing extrinsic compression. The balloon was inflated with a contrast agent and circumference changes were measured at increments of 4 ATM, 10 ATM, and burst pressure. Balloons were tested in triplicate for each load. All balloons were unable to reach 90% of their expected diameter with larger constrictive loads (122g) at low (4 ATM) and nominal (10 ATM) inflation pressures. Only the Bard and Cook balloons reached at least 90% of the expected diameter with a coefficient of variance (CV) less than 10% at burst pressure under the larger constrictive load (122g), 94.3% +/- 6.7%, CV 7.1% and 96.3% +/- 2.9%, CV 3.0% respectively. All balloons performed well under low constriction forces and reached at least 80% of the expected diameter by 10 ATM under all constrictive loads. The Bard X-Force and Cook Ultraxx percutaneous nephrostomy balloons achieved the most reliable radial dilation against large constrictive forces simulating fascial or retroperitoneal scar tissue.

  9. Balloon infrared astronomy platform (BIRAP). [development and characteristics of a balloon-borne attitude control system

    Science.gov (United States)

    Greeb, M. E.; True, G. A.

    1974-01-01

    The development of a balloon-borne attitude control system for infrared astronomy studies is discussed. The Balloon Infrared Astronomy Platform (BIRAP) is the result of the development effort. The BIRAP uses electronic gimballing for the offset pointing which eliminates a set of mechanical gimbals. Guide stars with visual magnitudes as low as plus 6 are used for fine tracking assuring that all areas of the sky can be covered. The BIRAP control concept uses a closed loop system in the airborne equipment with automatic update through a command link that can be operated either manually or automatically by a ground based computer.

  10. Lung injury following thoracic aortic occlusion: comparison of sevoflurane and propofol anaesthesia.

    Science.gov (United States)

    Annecke, T; Kubitz, J C; Langer, K; Hilberath, J M; Kahr, S; Krombach, F; Bittmann, I; Rehm, M; Kemming, G I; Conzen, P F

    2008-08-01

    Halogenated anaesthetics have been shown to reduce ischaemia-reperfusion injuries in various organs due to pre- and post-conditioning mechanisms. We compared volatile and total intravenous anaesthesia with regard to their effect on remote pulmonary injury after thoracic aortic occlusion and reperfusion. Eighteen pigs were randomized after sternotomy and laparotomy (fentanyl-midazolam anaesthesia) to receive either sevoflurane or propofol in an investigator-blinded fashion. Ninety minutes of thoracic aortic occlusion was induced by a balloon catheter. During reperfusion, a goal-directed resuscitation protocol was performed. After 120 min of reperfusion, the anaesthetic regimen was changed to fentanyl-midazolam again for another 180 min. The oxygenation index and intra-pulmonary shunt fractions were calculated. After 5 h of reperfusion, a bronchoalveolar lavage was performed. The total protein content and lactate dehydrogenase activity were measured in epithelial lining fluid (ELF). Alveolar macrophage oxidative burst was analysed. The wet to dry ratio was calculated and tissue injury was graded using a semi-quantitative score. Ten animals (n=5 for each anaesthetic) without aortic occlusion served as time controls. The oxygenation index decreased and the intra-pulmonary shunt fraction increased significantly in both occlusion groups. There were no significant differences between sevoflurane and propofol with respect to the oxygenation index, ELF composition, morphologic lung damage, wet to dry ratio and alveolar macrophage burst activity. Differences were, however, seen in terms of systemic haemodynamic stability, where catecholamine requirements were less pronounced with sevoflurane. We conclude that the severity of remote lung injury was not different between sevoflurane and propofol anaesthesia in this porcine model of severe lower-body ischaemia and reperfusion injury.

  11. Pulmonary veno-occlusive disease.

    Science.gov (United States)

    Montani, David; Lau, Edmund M; Dorfmüller, Peter; Girerd, Barbara; Jaïs, Xavier; Savale, Laurent; Perros, Frederic; Nossent, Esther; Garcia, Gilles; Parent, Florence; Fadel, Elie; Soubrier, Florent; Sitbon, Olivier; Simonneau, Gérald; Humbert, Marc

    2016-05-01

    Pulmonary veno-occlusive disease (PVOD) is a rare form of pulmonary hypertension (PH) characterised by preferential remodelling of the pulmonary venules. In the current PH classification, PVOD and pulmonary capillary haemangiomatosis (PCH) are considered to be a common entity and represent varied expressions of the same disease. The recent discovery of biallelic mutations in the EIF2AK4 gene as the cause of heritable PVOD/PCH represents a major milestone in our understanding of the molecular pathogenesis of PVOD. Although PVOD and pulmonary arterial hypertension (PAH) share a similar clinical presentation, with features of severe precapillary PH, it is important to differentiate these two conditions as PVOD carries a worse prognosis and life-threatening pulmonary oedema may occur following the initiation of PAH therapy. An accurate diagnosis of PVOD based on noninvasive investigations is possible utilising oxygen parameters, low diffusing capacity for carbon monoxide and characteristic signs on high-resolution computed tomography of the chest. No evidence-based medical therapy exists for PVOD at present and lung transplantation remains the preferred definitive therapy for eligible patients. Copyright ©ERS 2016.

  12. Maximizing mandibular prosthesis stability utilizing linear occlusion, occlusal plane selection, and centric recording.

    Science.gov (United States)

    Williamson, Richard A; Williamson, Anne E; Bowley, John; Toothaker, Randy

    2004-03-01

    The stability of mandibular complete dentures may be improved by reducing the transverse forces on the denture base through linear (noninterceptive) occlusion, selecting an occlusal plane that reduces horizontal vectors of force at occlusal contact, and utilizing a central bearing intraoral gothic arch tracing to record jaw relations. This article is intended to acquaint the reader with one technique for providing stable complete denture prostheses using the aforementioned materials, devices, and procedures.

  13. Temporary closure of the tunnel

    CERN Multimedia

    Relations with the Host States Service

    2005-01-01

    Owing to major maintenance work, the tunnel linking the various parts of the CERN site will be closed from Monday 4 July to Sunday 24 July 2005 The Host State authorities have given authorisation for persons employed by CERN or the Institutes to travel and for goods belonging to these entities to be transported between the various parts of the site via Gate E (Charles de Gaulle) while this work is being carried out, subject to strict compliance with the Rules for the Use of the Tunnel (see http://dsu.web.cern.ch/dsu/dsum/hsr/DOCUMENTS/8200980415.pdf). Gate E will thus be open between 7.00 a.m. and 7.00 p.m. from Monday to Friday during the period concerned. The rules governing the use of Gate E to enter the Meyrin site between 7.30 a.m. and 9.00 a.m. or to leave the site between 5.00 p.m. and 6.30 p.m. (see http://dsu.web.cern.ch/dsu/dsum/hsr/DOCUMENTS/12222_041027.pdf)) will remain unaffected by this temporary authorisation. Relations with the Host States Service and TS-FM Group

  14. Principles of occlusion in implant dentistry

    Directory of Open Access Journals (Sweden)

    Mahesh Verma

    2015-01-01

    Full Text Available Dental implants require different biomechanical considerations from natural teeth. Also, with one of the criteria for long-term implant success being “occlusion,” it becomes imperative for the clinician to be well versed with the different concepts when rehabilitating with an implant prosthesis. All endeavors must be made to reduce the overload and noxious forces on implants during mandibular movements. The occlusal rehabilitation schemes for implant-supported prostheses are derivatives of the occlusal scheme for natural dentition. The implant-protected occlusion (IPO scheme has been designed to ensure the longevity of both prosthesis and implant. The article reviews the concepts of IPO and their applicability in different clinical scenarios.

  15. [The occlusal curvature and masticatory function].

    Science.gov (United States)

    Okano, Kota

    2011-10-01

    This study examined the association between masticatory movement and occlusal curvature in dentate adults. Forty-six subjects (mean age : 25.0 years) with complete permanent dentition except for their third molars participated in this study. A mandibular cast mounted on the lower member of an articulator was fixed to a three-dimensional measuring gauge (QM-Measure 353). Approximate spheres were calculated from the measurements according to the Broadrick Occlusal Plane Analyser. Subjects were asked to chew raw carrot, cheese, fish paste, boiled beef and gummy candy prepared to the size of 10 x 10 x 20 mm. Three-dimensional chewing movements of the mandibular central incisor point were measured using a Gnatho-analyzer. The Pearson correlation coefficient and multiple regression analysis were used to test the relationship between the occlusal curvature and masticatory movement. Significant correlations were found between masticatory movement and occlusal curvature in dentate adults (p masticatory movements.

  16. Effect of glove occlusion on the skin barrier

    DEFF Research Database (Denmark)

    Tiedemann, Daniel; Clausen, Maja Lisa; John, Swen Malthe

    2016-01-01

    that the negative effect of occlusion in itself is limited, and that only extensive and long-term occlusion will cause barrier impairment. However, studies investigating combined effect of occlusion and exposure to soaps/detergents indicate that occlusion significantly enhances the skin barrier damage caused...... by detergents/soaps in a dose-response fashion....

  17. Current possibilities in occlusal caries management

    Directory of Open Access Journals (Sweden)

    Hrvoje Jurić

    2013-11-01

    Full Text Available Dental caries is a multifactorial disease that affects most populations throughout the world and it is still the primary cause of oral pain and tooth loss. The occlusal surfaces of posterior teeth are the most vulnerable sites for dental caries due to their anatomy. Therefore, the aim of the following article is to summarize current knowledge on occlusal caries development and the possibilities of its prevention. Although the overall caries rate today has fallen for populations in industrialized countries, the rate of occlusal surface caries has not decreased. This may be explained with fact that topically applied fluorides and their mode of action prevent caries better on smooth than on occlusal surfaces. As we know, tooth decay of first permanent molars causes a great deal of different short and long term difficulties for patients. Therefore, there is a continuous need for implementation of programs for caries prevention in permanent teeth. Nowadays, we like to treat our patients by minimally invasive methods. A very important step in our effective preventive treatment is sealing pits and fissures as a cornerstone of occlusal caries management. Reliable assessment of caries activity is also very important for defining treatment needs and plans. A very important decision, which should be made during occlusal caries management, is the selection of restorative material according to the treatment plan. Conclusion. Current possibilities in occlusal caries prevention and management are very effective. Therefore, dentists today do not have any excuse for avoiding the philosophy of Minimally Invasive Dentistry, especially when we talk about caries management of occlusal surfaces in permanent molars.

  18. Branch retinal artery occlusion in Susac's syndrome

    Directory of Open Access Journals (Sweden)

    Ricardo Evangelista Marrocos de Aragão

    2015-02-01

    Full Text Available Susac's syndrome is a rare disease attribuited to a microangiopathy involving the arterioles of the cochlea, retina and brain. Encefalopathy, hearing loss, and visual deficits are the hallmarks of the disease. Visual loss is due to multiple, recurrent branch arterial retinal occlusions. We report a case of a 20-year-old women with Susac syndrome presented with peripheral vestibular syndrome, hearing loss, ataxia, vertigo, and vision loss due occlusion of the retinal branch artery.

  19. A controversy with respect to occlusion

    National Research Council Canada - National Science Library

    Fukushima, Shunji

    2016-01-01

    ... with a normal physiological occlusion, and not to patients with deformed condyles. In the least, the definition of CR in the latest edition of the Glossary of Prosthodontic Terms (GPT) [2] has excluded such applications in these patients. Recently, there has been great progress made in the diagnostic imaging of the temporomandibular joint (TMJ), which clearly shows that there are large number of patients with deformed condyles. These deformities may have resulted from such factors as aging, occlusal ...

  20. AUTOPERFUSION BALLOON CATHETER FOR COMPLICATED CORONARY ANGIOPLASTY - A PROSPECTIVE-STUDY WITH RETROSPECTIVE CONTROLS

    NARCIS (Netherlands)

    DEMUINCK, ED; VANDIJK, RB; DENHEIJER, P; MEEDER, JG; LIE, KI

    1992-01-01

    Prolonged angioplasty balloon inflation with an autoperfusion balloon for failed conventional coronary angioplasty, was compared with emergency surgery for this condition. Restenosis was assessed 6 weeks after successful intervention with the autoperfusion balloon. Forty consecutive patients with

  1. PC based temporary shielding administrative procedure (TSAP)

    Energy Technology Data Exchange (ETDEWEB)

    Olsen, D.E.; Pederson, G.E. [Sargent & Lundy, Chicago, IL (United States); Hamby, P.N. [Commonwealth Edison Co., Downers Grove, IL (United States)

    1995-03-01

    A completely new Administrative Procedure for temporary shielding was developed for use at Commonwealth Edison`s six nuclear stations. This procedure promotes the use of shielding, and addresses industry requirements for the use and control of temporary shielding. The importance of an effective procedure has increased since more temporary shielding is being used as ALARA goals become more ambitious. To help implement the administrative procedure, a personal computer software program was written to incorporate the procedural requirements. This software incorporates the useability of a Windows graphical user interface with extensive help and database features. This combination of a comprehensive administrative procedure and user friendly software promotes the effective use and management of temporary shielding while ensuring that industry requirements are met.

  2. Temporary Authorizations at Permitted Waste Management Facilities

    Science.gov (United States)

    This rule under the Code of Federal Regulations (CFR) provides EPA with the authority to grant a permittee temporary authorization, without prior public notice and comment, to conduct activities necessary to respond promptly to changing conditions.

  3. Open bite treated with extractions and temporary anchorage devices

    Directory of Open Access Journals (Sweden)

    Carol Weinstein

    2017-01-01

    Full Text Available A 13-year-old female with a chief complaint of continuing treatment presented with Class I skeletal pattern and slight facial asymmetry. Intraorally, she had Class II molar relationship on the right side, class l on the left side and 3mm. of midline discrepancy. Her upper and lower incisors were proclined and slightly crowded. She had 1 mm. overbite and 5mm. overjet in initial mounted casts. Splint therapy was suggested to stabilize mandibular position. After splint wear, a new mounting was made, which resulted in an open bite from left second molars to right second molars. A visual treatment objective was prepared with four first bicuspid extractions. After 9 months, upper second molars were extracted and temporary anchorage devices (TADs were placed in the upper arch for intrusion. Detailing strategies such as bracket repositioning, occlusal adjustment, and elastics were used. The role of segmented models, second molar extraction treatment, and superimposition analysis in patients with discrepancies in mandibular position is discussed. It is concluded that a thorough case workup is needed to provide patients with a successful treatment for open bite cases. This case was treated orthodontically in 2 years with four bicuspid and upper second molar extractions as well as vertical control with TADs.

  4. [Lingualized occlusion in the South African context].

    Science.gov (United States)

    Oberholzer, T G; Geerts, G A V M

    2002-01-01

    The search for the ideal artificial tooth arrangement that maximizes denture stability, comfort, aesthetics, and function has occupied the dental literature for many years and still continues to do so. Of the many occlusal schemes that have been presented to the dental profession, that of lingualized occlusion has emerged as one of the more popular. The popularity of lingualized occlusion stems from the simplicity and flexibility of the concept and from its wide application to clinical practice (Parr & Ivanhoe, 1996). The registration of a repeatable correct centric jaw relation is not always possible. We don't know whether the patient will use centric relation during normal function. It is therefore useful to provide the patient with some freedom of movement around centric. lingualized occlusion provides freedom in centric. For many dentists the arrangement of artificial denture teeth into balanced occlusion is difficult and time consuming. As a result this task is most often performed by the dental technician. In the South African countryside dental laboratories are often far away. If dentists perform the arrangement of the denture teeth, time and costs can be saved. The mounting of denture teeth in lingualized occlusion is simple and fast. This will motivate dentists to arrange denture teeth themselves, with obvious benefits for both the patient and the dentist. The School of Oral Health Sciences of the University of Stellenbosch teaches this concept to its undergraduate students in order to improve the prosthetic service to the large edentulous population of South Africa.

  5. Epulis and pyogenic granuloma with occlusal interference

    Directory of Open Access Journals (Sweden)

    Widowati Witjaksono

    2005-06-01

    Full Text Available In dental clinic of Hospital University Science Malaysia (HUSM, there were cases with Localized Gingival Enlargement (LGE in the oral cavity with occlusal interference. In this study, three cases were observed. They were a 13 - year- old female with fibrous lge around 31 and 32 with occlusal interference in protrusive movement due to X bite, a 15 - year – old female with pyogenic granuloma near 11 & 21 with occlusal interference due to deep bite; and a 24 – year – old female who was eight months in pregnancy with pyogenic granuloma on the 34-35 and severe generalized pregnancy gingivitis with occlusal interference in centric occlusion and lateral movement. Clinical and histopathological diagnosis of the first case showed fibrous epulis, whereas the second and third cases disclosed pyogenic granuloma. Chronic trauma of the gingiva due to occlusal interference was assumed to be the cause of those LGE in case 1 and 2, while in case 3 poor oral hygiene and chronic trauma were assumed to be the etiologic factors.

  6. Is occlusion becoming more confusing? A plea for simplicity.

    Science.gov (United States)

    Christensen, Gordon J

    2004-06-01

    It is not difficult to observe and record patient occlusal characteristics before starting simple or complex occlusal rehabilitations. If this is done, and if the subsequently placed crowns and fixed prostheses are constructed in observation of similar characteristics, clinical success usually is the result. Deviations from the suggestion to duplicate the "normal" occlusion should be made when the original natural occlusion had caused overt pathosis, or when all teeth or one arch of the teeth is being restored at one time. If this is the case, centric relation occlusion is more reproducible and easier to develop than occlusion with a shift from centric relation to centric occlusion. Peculiar requests of patients relative to occlusal positioning, or routine dependence on various devices to predetermine occlusal characteristics for rehabilitation (as is currently popular in some groups), should be considered, but they should be tempered with careful observation of preoperative occlusal characteristics.

  7. Six-Month Results From the Initial Randomized Study of the Ranger Paclitaxel-Coated Balloon in the Femoropopliteal Segment.

    Science.gov (United States)

    Bausback, Yvonne; Willfort-Ehringer, Andrea; Sievert, Horst; Geist, Volker; Lichtenberg, Michael; Del Giudice, Costantino; Sauguet, Antoine; Diaz-Cartelle, Juan; Marx, Claudia; Ströbel, Armin; Schult, Ingolf; Scheinert, Dierk

    2017-08-01

    To evaluate the performance of the Ranger paclitaxel-coated balloon vs uncoated balloon angioplasty for femoropopliteal lesions. Between January 2014 and October 2015, the prospective, randomized RANGER SFA study ( ClinicalTrials.gov identifier NCT02013193) enrolled 105 patients with symptomatic lower limb ischemia (Rutherford category 2-4) and stenotic lesions in the nonstented femoropopliteal segment at 10 European centers. Seventy-one patients (mean age 68±8 years; 53 men) were enrolled in the Ranger drug-coated balloon (DCB) arm and 34 patients (mean age 67±9 years; 23 men) were assigned to the control group. Six-month analysis included angiographic late lumen loss and safety and clinical outcomes assessments. Baseline characteristics of the DCB and control groups were similar, as were lesion lengths (68±46 vs 60±48 mm; p=0.731), severity of calcification (p=0.236), and the prevalence of occlusions (34% vs 34%; p>0.999). At 6 months, late lumen loss was significantly less for the DCB group vs controls (-0.16±0.99 vs 0.76±1.4; p=0.002). The DCB group had significantly greater freedom from binary restenosis (92% vs 64%; p=0.005) and primary patency rates (87% vs 60%; p=0.014). Target lesion revascularization rates were 5.6% in the DCB group and 12% in the control group (p=0.475). No target limb amputations or device-related deaths occurred in either group. Six-month results suggest that Ranger DCB treatment effectively inhibited restenosis in symptomatic femoropopliteal disease, resulting in improved vessel patency and a low revascularization rate in the short term compared with uncoated balloon angioplasty.

  8. Estimation of temporary emigration in male toads.

    Science.gov (United States)

    Muths, Erin; Scherer, Rick D; Corn, Paul Stephen; Lambert, Brad A

    2006-04-01

    Male boreal toads (Bufo boreas) are thought to return to the breeding site every year but, if absent in a particular year, will be more likely to return the following year. Using Pollock's robust design we estimated temporary emigration (the probability a male toad is absent from a breeding site in a given year) at three locations in Colorado, USA: two in Rocky Mountain National Park and one in Chaffee County. We present data that suggest that not all male toads return to the breeding site every year. Our analyses indicate that temporary emigration varies by site and time (for example, from 1992 to 1998, the probability of temporary emigration ranged from 10% to 29% and from 3% to 95% at Lost Lake and Kettle Tarn, respectively). Although the results provide weak evidence that males are more likely to return after a year's hiatus, a general pattern of state-dependent temporary emigration was not supported. We also hypothesized relationships between temporary emigration and a number of weather variables. While some competitive models included weather covariates, imprecise and variable estimates of the effects of these covariates precluded fully defining their impact on temporary emigration.

  9. Gender difference in autonomic and hemodynamic reactions to abrupt coronary occlusion.

    Science.gov (United States)

    Airaksinen, K E; Ikäheimo, M J; Linnaluoto, M; Tahvanainen, K U; Huikuri, H V

    1998-02-01

    We sought to determine whether there are gender-related differences in autonomic and hemodynamic responses to abrupt coronary occlusion. The risk of sudden death before hospital admission is higher in men with an acute myocardial infarction. The reasons for this gender-related difference are not well understood. Cardiovascular autonomic regulation modifies the outcome of acute coronary events, and there are gender differences in the autonomic regulation of heart rate (HR) in normal physiologic circumstances. We analyzed the changes in HR, HR variability and blood pressure and the occurrence of ventricular ectopic beats during a 2-min coronary occlusion in 140 men and 65 women referred for single-vessel coronary angioplasty. The ranges of nonspecific responses were determined by analyzing a control group of 19 patients with no ischemia during a 2-min balloon inflation in a totally occluded coronary artery. Women more often had ST segment changes (p < 0.01) and chest pain (p < 0.05) during the occlusion. Significant bradycardia or increase in HR variability as a sign of vagal activation occurred more often in women than in men (31% vs. 13%, p < 0.01 and 25% vs. 11%, p < 0.05, respectively). Coronary occlusion also more often caused (28% vs. 11%, p < 0.01) a decrease in blood pressure in women. The most pronounced female preponderance was in the incidence of Bezold-Jarisch-type reaction (i.e., simultaneous bradycardia and decrease in blood pressure [16% vs. 0.7%, p < 0.0001]). Logistic regression models developed to analyze the significance of gender while controlling for baseline variables and signs of ischemia identified female gender to be an independent predictor of bradycardic reactions (odds ratio [OR] 3.2, 95% confidence interval [CI] 1.4 to 7.7, p < 0.01), hypotensive reactions (OR 2.6, 95% CI 1.1 to 6.0, p < 0.05) and Bezold-Jarisch-type response (OR 22.2, 95% CI 2.5 to 200, p < 0.01). Significance of female gender as a protector against early coronary

  10. The recovery time of traumatic carotid-cavernous fistula-induced oculomotor nerve paresis after endovascular treatment with detachable balloons.

    Science.gov (United States)

    Liu, Yan-Chao; Duan, Chuan-Zhi; Gu, Da-Qun; Zhang, Xin; Li, Xi-Feng; He, Xu-Ying; Su, Shi-Xing; Lai, Ling-Feng; Hui-Li

    2014-12-01

    The recovery time of traumatic carotid-cavernous fistula-induced oculomotor nerve paresis (ONP) after endovascular embolization with detachable balloons has not yet been adequately evaluated. This study was performed to make a deep analysis of the factors, which affect the prognosis of ONP after endovascular treatment of traumatic carotid-cavernous fistula (TCCF). We retrospectively evaluated the clinical characteristics and the outcome of oculomotor nerve function in a series of 98 consecutive patients with ONP due to traumatic carotid-cavernous fistula which were endovascular treated with detachable balloons. Univariate analysis was applied to test the association between the time of ONP recovery and clinical variables. Ninety-eight consecutive patients (62 males, 36 females, mean age 34.2±12.7years) having presented with ONP underwent endovascular treatment with detachable balloons were enrolled in this study. ONP was complete in 22 (22.4%) patients and partial in 76 (77.6%) patients. Ninety (91.8%) patients were successfully occluded by single-session endovascular embolization. Retreatments by transarterial routes had to be performed in 8 (8.2%) patients because of recurrent fistula having occurred within 4weeks after embolization. ONP was recovered completely in all the patients, among who 4 (4.1%) were treated with occlusion of internal carotid artery. Factors showing significant association with the recovery time of ONP were the location of the fistula (P=0.007), the degree of preoperative ONP (P=0.003), the number of detachable balloon used (P=0.000) and the length of ONP before endovascular treatment (P=0.000). Endovascular treatment of traumatic carotid-cavernous fistula-induced ONP with detachable balloons is a safe and effective method. The length of ONP before endovascular treatment, the location of the fistula, the degree of preoperative ONP, the number of detachable balloons used were the statistically significant predictors of the length of ONP

  11. Advanced Thin Ionization Calorimeter (ATIC) Balloon Experiment

    Science.gov (United States)

    Wefel, John P.; Guzik, T. Gregory

    2001-01-01

    During grant NAG5-5064, Louisiana State University (LSU) led the ATIC team in the development, construction, testing, accelerator validation, pre-deployment integration and flight operations of the Advanced Thin Ionization Calorimeter (ATIC) Balloon Experiment. This involved interfacing among the ATIC collaborators (UMD, NRL/MSFC, SU, MSU, WI, SNU) to develop a new balloon payload based upon a fully active calorimeter, a carbon target, a scintillator strip hodoscope and a pixilated silicon solid state detector for a detailed investigation of the very high energy cosmic rays to energies beyond 10(exp 14) eV/nucleus. It is in this very high energy region that theory predicts changes in composition and energy spectra related to the Supernova Remnant Acceleration model for cosmic rays below the "knee" in the all-particle spectrum. This report provides a documentation list, details the anticipated ATIC science return, describes the particle detection principles on which the experiment is based, summarizes the simulation results for the system, describes the validation work at the CERN SPS accelerator and details the balloon flight configuration. The ATIC experiment had a very successful LDB flight from McMurdo, Antarctica in 12/00 - 1/01. The instrument performed well for the entire 15 days. Preliminary data analysis shows acceptable charge resolution and an all-particle power law energy deposition distribution not inconsistent with previous measurements. Detailed analysis is underway and will result in new data on the cosmic ray charge and energy spectra in the GeV - TeV energy range. ATIC is currently being refurbished in anticipation of another LDB flight in the 2002-03 period.

  12. The Results of a New Distal Protection Method in Intervention for Chronic Total Occlusion of the Superficial Femoral Artery

    Directory of Open Access Journals (Sweden)

    Tomoko Kobayashi

    2009-01-01

    Full Text Available Aims. To determine the efficacy of a new distal protection method in SFA CTO interventions. Methods and Results. From June 2003 to February 2009, ninety-two consecutive, chronic total occlusions of superficial femoral arteries were treated with catheter-based intervention using a bidirectional approach. Nine of these cases were managed with our original, distal protection method, based on symptoms, angiographic images, wire resistance, and intravascular ultrasound images. The average age was 73 years; eight patients were male. The mean occlusion length was 17.1 cm. A distal protection balloon was inserted from the retrograde sheath in the popliteal artery and placed distal to the occluded lesion after successful wire crossing. Lesion dilatation with a balloon was performed antegradely and debris was removed by 6Fr. guiding catheter. Debris was retrieved from all lesions, consisting mainly of thrombus. Where we decided not to use the distal protection method, there was no distal thromboembolism. Conclusion. In SFA-CTO intervention, the risk of distal embolization is 10%, which can be anticipated and eliminated by the distal protection method.

  13. Pneumothorax, music and balloons: A case series

    Directory of Open Access Journals (Sweden)

    Shiferaw Dejene

    2013-01-01

    Full Text Available We describe two cases of spontaneous pneumothorax in young healthy adults with no underlying structural lung disease. The onset of pneumothorax was following physical activity including playing musical instruments and blowing of balloons. There is sparse data evaluating the pathophysiology of primary spontaneous pneumothorax in relation to increased mouth pressures. These cases highlight the possible physical effect of valsalva manoeuvre on transpulmonary pressures, and the potential risk of developing pneumothorax in otherwise healthy individuals. This aspect of pneumothorax development is worthy of further exploration, to better elucidate the mechanism and enhance our understanding of this common respiratory presentation.

  14. Flight Qualification of the NASA's Super Pressure Balloon

    Science.gov (United States)

    Cathey, Henry; Said, Magdi; Fairbrother, Debora

    Designs of new balloons to support space science require a number of actual flights under various flight conditions to qualify them to as standard balloon flight offerings to the science community. Development of the new Super Pressure Balloon for the National Aeronautics and Space Administration’s Balloon Program Office has entailed employing new design, analysis, and production techniques to advance the state of the art. Some of these advances have been evolutionary steps and some have been revolutionary steps requiring a maturing understanding of the materials, designs, and manufacturing approaches. The NASA Super Pressure Balloon development end goal is to produce a flight vehicle that is qualified to carry a ton of science instrumentation, at an altitude greater than 33 km while maintaining a near constant pressure altitude for extended periods of up to 100 days, and at any latitude on the globe. The NASA’s Balloon Program Office has pursued this development in a carefully executed incremental approach by gradually increasing payload carrying capability and increasing balloon volume to reach these end goal. A very successful test flight of a ~200,700 m3 balloon was launch in late 2008 from Antarctica. This balloon flew for over 54 days at a constant altitude and circled the Antarctic continent almost three times. A larger balloon was flown from Antarctica in early 2011. This ~422,400 m3 flew at a constant altitude for 22 days making one circuit around Antarctica. Although the performance was nominal, the flight was terminated via command to recover high valued assets from the payload. The balloon designed to reach the program goals is a ~532,200 m3 pumpkin shaped Super Pressure Balloon. A test flight of this balloon was launched from the Swedish Space Corporation’s Esrange Balloon Launch Facilities near Kiruna, Sweden on 14 August, 2012. This flight was another success for this development program. Valuable information was gained from this short test

  15. External caps: An approach to stress reduction in balloons

    Science.gov (United States)

    Hazlewood, K. H.

    Recent findings of the catastrophic balloon failures investigation in the U.S.A. indicate that very large gross inflations, in balloons using present design philosophy, over-stress currently available materials. External caps are proposed as an economic approach to reducting those stresses to an acceptable level.

  16. Is Endoscopy Really Necessary for Placing Intragastric Balloons?

    NARCIS (Netherlands)

    Mathus-Vliegen, Elisabeth M. H.

    2018-01-01

    Gastric balloons for weight loss have historically been placed after a screening endoscopy. However, the utility and yield of these endoscopies has not been studied. Therefore, we wanted to evaluate the utility of screening endoscopy and to assess patients who had balloons placed without endoscopy.

  17. Scientific ballooning in the 20 th century; a historical perspective

    Science.gov (United States)

    Nishimura, J.

    Hess discovered the cosmic rays in 1912. Using a manned balloon, he found the altitude variation of the radiation. After this discovery, many balloon experiments were performed to explore the most mysterious radiation coming from outside of the earth during the 1920's to the 1930's. At the end of the 1940's, balloon systems were revolutionized by the use of new plastic films and telemetry systems. At almost the same time, highly sensitive nuclear emulsions were developed. Balloon exposures of emulsions brought us new discoveries of the heavy primaries in cosmic rays. Extensive studies with nuclear emulsions discovered high-energy phenomena and new particles between the end of 1940's to the 1960's. At the same time, in various countries, experiments with more sophisticated electronic devices were begun together with ingenious work on balloon technology. Inventions were made in the areas of designing, manufacturing, materials, telemetry systems for balloons and long duration flight systems etc. Several permanent launching stations were established in various countries in the 1960's Here, I review the development of essential technologies in scientific ballooning, and their value in contributing to the growth of space physics. As the future prospect, I stress the point that scientific ballooning is indispensable and a most cost-effective way to explore space astrophysics and Earth science, in addition to the preparation of satellite and the space station experiments.

  18. The Balloon Foot ; A Rare Presentation Of Congenital Constricting ...

    African Journals Online (AJOL)

    We present a case of a rare manifestation of congenital constricting annular band (CAB) in the lower extremity resulting in a severe excessive swelling of the foot which we have termed Balloon foot. The ballooned foot is caused by a progressive deepening of the circumferential constriction into the soft tissue of the lower ...

  19. Coronary artery angioplasty with a helical autoperfusion balloon catheter

    NARCIS (Netherlands)

    Gurbel, PA; Anderson, RD; vanBoven, AJ; denHeijer, P

    The initial in-hospital and long-term clinical experience with a helical autoperfusion balloon catheter in the treatment of coronary artery disease is reported, This new catheter design allows blood to flow passively around the inflated balloon through a protected helical channel molded into the

  20. The cerebral representation of temporomandibular joint occlusion and its alternation by occlusal splints.

    Science.gov (United States)

    Lotze, Martin; Lucas, Christian; Domin, Martin; Kordass, Bernd

    2012-12-01

    Occlusal splints are a common and effective therapy for temporomandibular joint disorder. Latest hypotheses on the impact of occlusal splints suggest an altered cerebral control on the occlusion movements after using a splint. However, the impact of using a splint during chewing on its cerebral representation is quite unknown. We used functional magnetic resonance imaging (fMRI) to investigate brain activities during occlusal function in centric occlusion on natural teeth or on occlusal splints in fifteen healthy subjects. Comparisons between conditions revealed an increased activation for the bilateral occlusion without a splint in bilateral primary and secondary sensorimotor areas, the putamen, inferior parietal and prefrontal cortex (left dorsal and bilateral orbital) and anterior insular. In contrast, using a splint increased activation in the bilateral prefrontal lobe (bilateral BA 10), bilateral temporo-parietal (BA 39), occipital and cerebellar hemispheres. An additionally applied individually based evaluation of representation sites in regions of interest demonstrated that the somatotopic representation for both conditions in the pre- and postcentral gyri did not significantly differ. Furthermore, this analysis confirmed the decreasing effect of the splint on bilateral primary and secondary motor and somatosensory cortical activation. In contrast to the decreasing effect on sensorimotor areas, an increased level of activity in the fronto-parieto-occipital and cerebellar network might be associated with the therapeutic effect of occlusal splints. Copyright © 2011 Wiley Periodicals, Inc.

  1. TIPS Placement via Combined Transjugular and Transhepatic Approach for Cavernous Portal Vein Occlusion: Targeted Approach.

    Science.gov (United States)

    Jourabchi, Natanel; McWilliams, Justin Pryce; Lee, Edward Wolfgang; Sauk, Steven; Kee, Stephen Thomas

    2013-01-01

    Purpose. We report a novel technique which aided recanalization of an occluded portal vein for transjugular intrahepatic portosystemic shunt (TIPS) creation in a patient with symptomatic portal vein thrombosis with cavernous transformation. Some have previously considered cavernous transformation a contraindication to TIPS. Case Presentation. 62-year-old man with chronic pancreatitis, portal vein thrombosis, portal hypertension and recurrent variceal bleeding presents with melena and hematemesis. The patient was severely anemic, hemodynamically unstable, and required emergent portal decompression. Attempts to recanalize the main portal vein using traditional transjugular access were unsuccessful. After percutaneous transhepatic right portal vein access and navigation of a wire through the occluded main portal vein, an angioplasty balloon was inflated at the desired site of shunt takeoff. The balloon was targeted and punctured from the transjugular approach, and a wire was passed into the portal system. TIPS placement then proceeded routinely. Conclusion. Although occlusion of the portal vein increases difficulty of performing TIPS, it should not be considered an absolute contraindication. We have described a method for recanalizing an occluded portal vein using a combined transhepatic and transjugular approach for TIPS. This approach may be useful to relieve portal hypertension in patients who fail endoscopic and/or surgical therapies.

  2. TIPS Placement via Combined Transjugular and Transhepatic Approach for Cavernous Portal Vein Occlusion: Targeted Approach

    Directory of Open Access Journals (Sweden)

    Natanel Jourabchi

    2013-01-01

    Full Text Available Purpose. We report a novel technique which aided recanalization of an occluded portal vein for transjugular intrahepatic portosystemic shunt (TIPS creation in a patient with symptomatic portal vein thrombosis with cavernous transformation. Some have previously considered cavernous transformation a contraindication to TIPS. Case Presentation. 62-year-old man with chronic pancreatitis, portal vein thrombosis, portal hypertension and recurrent variceal bleeding presents with melena and hematemesis. The patient was severely anemic, hemodynamically unstable, and required emergent portal decompression. Attempts to recanalize the main portal vein using traditional transjugular access were unsuccessful. After percutaneous transhepatic right portal vein access and navigation of a wire through the occluded main portal vein, an angioplasty balloon was inflated at the desired site of shunt takeoff. The balloon was targeted and punctured from the transjugular approach, and a wire was passed into the portal system. TIPS placement then proceeded routinely. Conclusion. Although occlusion of the portal vein increases difficulty of performing TIPS, it should not be considered an absolute contraindication. We have described a method for recanalizing an occluded portal vein using a combined transhepatic and transjugular approach for TIPS. This approach may be useful to relieve portal hypertension in patients who fail endoscopic and/or surgical therapies.

  3. Balloon concepts for scientific investigation of Mars and Jupiter

    Science.gov (United States)

    Ash, R. L.

    1979-01-01

    Opportunities for scientific investigation of the atmospheric planets using buoyant balloons have been explored. Mars and Jupiter were considered in this study because design requirements at those planets bracket nominally the requirements at Venus, and plans are already underway for a joint Russian-French balloon system at Venus. Viking data has provided quantitative information for definition of specific balloon systems at Mars. Free flying balloons appear capable of providing valuable scientific support for more sophisticated Martian surface probes, but tethered and powered aerostats are not attractive. The Jovian environment is so extreme, hot atmosphere balloons may be the only scientific platforms capable of extended operations there. However, the estimated system mass and thermal energy required are very large.

  4. A Rare and Serious Unforeseen Complication of Cutting Balloon Angioplasty

    Directory of Open Access Journals (Sweden)

    Praveen Vemula

    2014-01-01

    Full Text Available Cutting balloon angioplasty (CBA is one of the adept ways of treating “in-stent restenosis.” Various complications related to cutting balloon angioplasty have been reported including arterial rupture, delayed perforation and fracture of microsurgical blades. Here we report a very unusual and inadvertent extraction of a stent previously deployed in the ramus intermedius coronary branch by a cutting balloon catheter. This required repeat stenting of the same site for an underlying dissection. Even though stent extraction is a rare complication it can be serious due to dissection, perforation, and closure of the artery. Physicians performing coronary artery interventions would need to be aware of this rare and serious complication especially if any difficulty is encountered while withdrawing the cutting balloon. Therefore, after removal, cutting balloon should be examined thoroughly for possible stent dislodgment or extraction when used for “in-stent restenosis.”

  5. Novel experience of laser-assisted 'inside-out' central venous access in a patient with bilateral subclavian vein occlusion requiring pacemaker implantation.

    Science.gov (United States)

    Aye, Thandar; Phan, Thanh Trung; Muir, Douglas Findlay; Linker, Nicholas John; Hartley, Richard; Turley, Andrew John

    2017-10-01

    This new laser facilitated 'inside-out' technique was used for transvenous pacemaker insertion in a pacemaker-dependent patient with bilateral subclavian occlusion and a failed epicardial system who is not suitable for a transfemoral approach. Procedure was undertaken under general anaesthesia with venous access obtained from right femoral vein and left axillary vein. 7F multipurpose catheter was used to enter proximal edge of the occluded segment of subclavian vein via femoral approach, which then supported stiff angioplasty wires and microcatheters to tunnel into the body of occlusion. When encountered with impenetrable resistance, 1.4 mm Excimer laser helped delivery of a Pilot 200 wire, which then progressed towards the distal edge of occlusion. Serial balloon dilatations allowed wire tracked into subintimal plane, advanced towards left clavicle using knuckle wire technique, which was then externalized with blunt dissection from infraclavicular pocket area. It was later changed to Amplatz superstiff wire exiting from both ends to form a rail, which ultimately allowed passage of pacing leads after serial balloon dilatation from clavicular end. Our hybrid 'inside-out' technique permitted transvenous pacemaker insertion without complication and this is, to our knowledge, the first case using laser in this context.

  6. THE KISSING BALLOON TECHNIQUE WITH 2 OVER-THE-WIRE BALLOON CATHETERS THROUGH A SINGLE 8-FRENCH GUIDING CATHETER

    NARCIS (Netherlands)

    DENHEIJER, P; BERNINK, PJLM; VANDIJK, RB; TWISK, SPM; LIE, KI

    Some of the newer over-the-wire coronary angioplasty catheters have shaft sizes of 3.0 French (F) or less. The inner diameter of modern 8-F guiding catheters is large enough to accommodate two of such balloon catheters. We report a kissing balloon procedure with two over-the-wire catheters through a

  7. Depicting Occlusion in Early Renaissance Art

    Science.gov (United States)

    Gillam, Barbara

    2011-01-01

    The artist attempting to give the impression of three-dimensional relationships must convey somehow that one surface is in front of another. There is a large and venerable literature in Psychology on this subject, showing how figure-ground, border ownership and amodal completion and continuation are determined but there is almost no discussion of how artist's have recruited these and other principles to create convincing impressions of occlusion. Even Gombrich (Art & Illusion 1960) only considers the situation in which a figure has to be imagined from very partial cues, not how juxtaposed elements in art are parsed perceptually into occluding and occluded surfaces. In this paper I shall discuss approaches to occlusion present in early Renaissance art and the degree to which the principles now well-known to Psychologists were discovered and used, as artists increasingly depicted naturalistic scenes. Among the preoccupations of these artists, as indicated by their work, were whether and how much to occlude faces (and the related issue of the management of haloes), occlusion of and by architectural features, and the importance or otherwise of transitivity in occlusion relationships within the scene. They also clearly used the ground plane, high viewpoints and arrangements of contour terminations, as well as more conventional figural cues, to disambiguate perceived occlusion or to avoid the confusion of multiple surfaces.

  8. Occlusion issues in early Renaissance art

    Science.gov (United States)

    Gillam, Barbara

    2011-01-01

    Early Renaissance painters innovatively attempted to depict realistic three-dimensional scenes. A major problem was to produce the impression of overlap for surfaces that occlude one another in the scene but are adjoined in the picture plane. Much has been written about perspective in art but little about occlusion. Here I examine some of the strategies for depicting occlusion used by early Renaissance painters in relation to ecological considerations and perceptual research. Perceived surface overlap is often achieved by implementing the principle that an occluding surface occludes anything behind it, so that occlusion perception is enhanced by a lack of relationship of occluding contour to occluded contours. Some well-known figure-ground principles are also commonly used to stratify adjoined figures. Global factors that assist this stratification include the placement of figures on a ground plane, a high viewpoint, and figure grouping. Artists of this period seem to have differed on whether to occlude faces and heads, often carefully avoiding doing so. Halos were either eliminated selectively or placed oddly to avoid such occlusions. Finally, I argue that the marked intransitivity in occlusion by architecture in the paintings of Duccio can be related to the issue of perceptual versus cognitive influences on the visual impact of paintings. PMID:23145262

  9. Depicting Occlusion in Early Renaissance Art

    Directory of Open Access Journals (Sweden)

    Barbara Gillam

    2011-05-01

    Full Text Available The artist attempting to give the impression of three-dimensional relationships must convey somehow that one surface is in front of another. There is a large and venerable literature in Psychology on this subject, showing how figure-ground, border ownership and amodal completion and continuation are determined but there is almost no discussion of how artist's have recruited these and other principles to create convincing impressions of occlusion. Even Gombrich (Art & Illusion 1960 only considers the situation in which a figure has to be imagined from very partial cues, not how juxtaposed elements in art are parsed perceptually into occluding and occluded surfaces. In this paper I shall discuss approaches to occlusion present in early Renaissance art and the degree to which the principles now well-known to Psychologists were discovered and used, as artists increasingly depicted naturalistic scenes. Among the preoccupations of these artists, as indicated by their work, were whether and how much to occlude faces (and the related issue of the management of haloes, occlusion of and by architectural features, and the importance or otherwise of transitivity in occlusion relationships within the scene. They also clearly used the ground plane, high viewpoints and arrangements of contour terminations, as well as more conventional figural cues, to disambiguate perceived occlusion or to avoid the confusion of multiple surfaces.

  10. Occlusion issues in early Renaissance art.

    Science.gov (United States)

    Gillam, Barbara

    2011-01-01

    Early Renaissance painters innovatively attempted to depict realistic three-dimensional scenes. A major problem was to produce the impression of overlap for surfaces that occlude one another in the scene but are adjoined in the picture plane. Much has been written about perspective in art but little about occlusion. Here I examine some of the strategies for depicting occlusion used by early Renaissance painters in relation to ecological considerations and perceptual research. Perceived surface overlap is often achieved by implementing the principle that an occluding surface occludes anything behind it, so that occlusion perception is enhanced by a lack of relationship of occluding contour to occluded contours. Some well-known figure-ground principles are also commonly used to stratify adjoined figures. Global factors that assist this stratification include the placement of figures on a ground plane, a high viewpoint, and figure grouping. Artists of this period seem to have differed on whether to occlude faces and heads, often carefully avoiding doing so. Halos were either eliminated selectively or placed oddly to avoid such occlusions. Finally, I argue that the marked intransitivity in occlusion by architecture in the paintings of Duccio can be related to the issue of perceptual versus cognitive influences on the visual impact of paintings.

  11. Progression of Diabetic Capillary Occlusion: A Model.

    Directory of Open Access Journals (Sweden)

    Xiao Fu

    2016-06-01

    Full Text Available An explanatory computational model is developed of the contiguous areas of retinal capillary loss which play a large role in diabetic maculapathy and diabetic retinal neovascularization. Strictly random leukocyte mediated capillary occlusion cannot explain the occurrence of large contiguous areas of retinal ischemia. Therefore occlusion of an individual capillary must increase the probability of occlusion of surrounding capillaries. A retinal perifoveal vascular sector as well as a peripheral retinal capillary network and a deleted hexagonal capillary network are modelled using Compucell3D. The perifoveal modelling produces a pattern of spreading capillary loss with associated macular edema. In the peripheral network, spreading ischemia results from the progressive loss of the ladder capillaries which connect peripheral arterioles and venules. System blood flow was elevated in the macular model before a later reduction in flow in cases with progression of capillary occlusions. Simulations differing only in initial vascular network structures but with identical dynamics for oxygen, growth factors and vascular occlusions, replicate key clinical observations of ischemia and macular edema in the posterior pole and ischemia in the retinal periphery. The simulation results also seem consistent with quantitative data on macular blood flow and qualitative data on venous oxygenation. One computational model applied to distinct capillary networks in different retinal regions yielded results comparable to clinical observations in those regions.

  12. Evaluation of the effectiveness of a semi-finished occlusal appliance – a randomized, controlled clinical trial

    Directory of Open Access Journals (Sweden)

    Ficnar Tobias

    2013-01-01

    Full Text Available Abstract Introduction Painful temporomandibular disorders (TMDs are usually treated with physiotherapy, self-exercises, medication-based therapy and splint therapy. For splint therapy different types of splints are available. Therefore this randomized controlled study compared the effectiveness of a semi-finished occlusal appliance (SB with a laboratory-made occlusal appliance (SS in myofascial pain patients. Method The trial subjects allocated to the experimental groups with the (SB occlusal appliance and those provided with a laboratory-made occlusal appliance (SS did, in addition, receive conservative treatment (self-exercises, drug-based and manual therapy. The control group was given conservative therapy (CO only. Overall, a total of 63 patients participated in the study with each group consisting of 21 subjects. Results When the first follow-up examination took place (14 days after splint insertion mouth opening within the SB group was significantly enlarged. When the second examination was conducted (2.5 months after splint insertion mouth opening was significantly enlarged in both splint groups when compared with the initial value. In the control group, no significant enlargement of mouth opening was detected. At no point there was a significant reduction in the number of pressure-sensitive areas of the TMJ. On palpation of the masticatory muscles however, a significant reduction in the number of pressure-sensitive areas could be observed within the CO group and the SS group after 2.5 months. When comparing pain reduction (muscle/joint pain and mouth opening, no significant differences could be detected between the treatments. Conclusion The results suggest that TMD should be treated conservatively. In cases of restricted mouth opening, the additional use of occlusal appliances can eliminate the patient’s discomfort more quickly. In this context, the tested, semi-finished occlusal appliance appears to offer an immediately available

  13. Treatment of hemobilia by transcatheter vascular occlusion

    Energy Technology Data Exchange (ETDEWEB)

    Vaughan, R.; Roesch, J.; Keller, F.S.; Antonovic, R.

    1984-08-01

    Four cases of hemobilia treated by transcatheter arterial occlusion are presented and reviewed with 30 similar cases reported in the literature. Transcatheter vascular occlusion successfully controlled hemorrhage in all 34 patients. No obvious liver parenchymal damage appeared in 26 patients; transient elevation of liver enzymes occurred in 6 patients (18%) including one in our series; two of the patients reviewed died of acute hepatic insufficiency following nonselective hepatic artery embolization. Hemobilia should be considered when gastrointestinal hemorrhage occurs after abdominal trauma, liver biopsy or other manipulative liver procedures. Hepatic angiography establishes the diagnosis and selective vascular occlusion is the treatment of choice for control of intractable or recurrent hemorrhage. Techniques and precautions for the diagnosis and transcatheter therapy of hemobilia are discussed.

  14. Dental Occlusion Influences the Standing Balance on an Unstable Platform.

    Science.gov (United States)

    Julià-Sánchez, Sonia; Álvarez-Herms, Jesús; Gatterer, Hannes; Burtscher, Martin; Pagès, Teresa; Viscor, Ginés

    2015-10-01

    Contradictory results are still reported on the influence of dental occlusion on the balance control. We attempted to determine whether there are differences in balance between opposed dental occlusion (Intercuspal position (ICP)/"Cotton rolls" mandibular position [CR]) for two extreme levels of stability (stable/ unstable). Twenty-five subjects were monitored under both dental occlusion and level of stability conditions using an unstable platform Balance System SD. The resulting stability index suggests that body balance is significantly better when dental occlusion is set in CR (p Occlusal traits significantly influencing postural control were Angle Class (p dental occlusion for the balance control comes strongly into effect in unstable conditions.

  15. Compliance with occlusion therapy for childhood amblyopia.

    Science.gov (United States)

    Wallace, Michael P; Stewart, Catherine E; Moseley, Merrick J; Stephens, David A; Fielder, Alistair R

    2013-09-17

    Explore compliance with occlusion treatment of amblyopia in the Monitored and Randomized Occlusion Treatment of Amblyopia Studies (MOTAS and ROTAS), using objective monitoring. Both studies had a three-phase protocol: initial assessment, refractive adaptation, and occlusion. In the occlusion phase, participants were instructed to dose for 6 hours/day (MOTAS) or randomized to 6 or 12 hour/day (ROTAS). Dose was monitored continuously using an occlusion dose monitor (ODM). One hundred and fifty-two patients (71 male, 81 female; 122 Caucasian, 30 non-Caucasian) of mean ± SD age 68 ± 18 months participated. Amblyopia was defined as an interocular acuity difference of at least 0.1 logMAR and was associated with anisometropia in 50, strabismus in 44, and both (mixed) in 58. Median duration of occlusion was 99 days (interquartile range 72 days). Mean compliance was 44%, mean proportion of days with no patch worn was 42%. Compliance was lower (39%) on weekends compared with weekdays (46%, P = 0.04), as was the likelihood of dosing at all (52% vs. 60%, P = 0.028). Compliance was lower when attendance was less frequent (P treatment duration (P amblyopia type, and severity were not associated with compliance. Mixture modeling suggested three subpopulations of patch day doses: less than 30 minutes; doses that achieve 30% to 80% compliance; and doses that achieve around 100% compliance. This study shows that compliance with patching treatment averages less than 50% and is influenced by several factors. A greater understanding of these influences should improve treatment outcome. (ClinicalTrials.gov number, NCT00274664).

  16. Need for adaptation: transformation of temporary houses.

    Science.gov (United States)

    Wagemann, Elizabeth

    2017-10-01

    Building permanent accommodation after a disaster takes time for reasons including the removal of debris, the lack of available land, and the procurement of resources. In the period in-between, affected communities find shelter in different ways. Temporary houses or transitional shelters are used when families cannot return to their pre-disaster homes and no other alternative can be provided. In practice, families stay in a standard interim solution for months or even years while trying to return to their routines. Consequently, they adapt their houses to meet their midterm needs. This study analysed temporary houses in Chile and Peru to illustrate how families modify them with or without external support. The paper underlines that guidance must be given on how to alter them safely and on how to incorporate the temporary solution into the permanent structure, because families adapt their houses whether or not they are so designed. © 2017 The Author(s). Disasters © Overseas Development Institute, 2017.

  17. Influence of mandibular fixation method on stability of the maxillary occlusal plane after occlusal plane alteration.

    Science.gov (United States)

    Yosano, Akira; Katakura, Akira; Takaki, Takashi; Shibahara, Takahiko

    2009-05-01

    In this study, we investigated how method of mandibular fixation influenced longterm postoperative stability of the maxilla in Class III cases. In particular, we investigated change in the maxillary occlusal plane after Occlusal Plane Alteration. Therefore, we focused on change in the palatal plane to evaluate stability of the maxillary occlusal plane, as the position of the palatal plane affects the maxillary occlusal plane. This study included 16 patients diagnosed with mandibular protrusion. Alteration of the occlusal plane was achieved by clockwise rotation of the maxilla by Le Fort I osteotomy and mandibular setback was performed by bilateral sagittal split ramus osteotomy. We analyzed and examined lateral cephalometric radiographs taken at 1 month, 3 months, 6 months, and 1 year after surgery. Stability achieved by two methods of mandibular fixation was compared. In one group of patients (group S) titanium screws were used, and in the other group (group P) titanium-locking mini-plates were used. No significant displacement was recognized in group S, whereas an approximately 0.7mm upward vertical displacement was recognized in the anterior nasal spine in group P. As a result, not only the angle of the palatal plane and S-N plane, but also occlusal plane angle in group P showed a greater decrease than that in group S. The results suggest that fixing the mandible with screws yielded greater stability of the maxilla and maxillary occlusal plane than fixing the mandible with titanium plates.

  18. Immediate Occlusal versus Non-Occlusal Loading of Implants: A Randomized Clinical Pilot Study.

    Science.gov (United States)

    Vogl, Susanne; Stopper, Marlene; Hof, Markus; Wegscheider, Walther A; Lorenzoni, Martin

    2015-06-01

    Immediate occlusal and non-occlusal loading protocols have been discussed and, despite varying success rates, are considered viable in selected cases. Preoperative implant planning and intraoperative transfer are essential to the success of implant-supported reconstructions in partially or completely edentulous jaws. This study was performed to compare clinical outcomes of immediate occlusal versus non-occlusal loading of posterior implants. Of 19 patients with 52 screw-type implants replacing mandibular molars or premolars, nine patients with 21 implants were randomized to a study group that received immediate restorations with occlusal loading, whereas 10 patients with 31 implants were randomized to a control group that received provisional restorations without occlusal loading. Occlusal loading was defined as full loading in maximum intercuspidation. Single-tooth or splinted multiunit restorations were incorporated by screw retention or cementation. Marginal bone defects (MBD), implant survival, and implant success were evaluated 12 months after insertion. Both groups revealed similar MBD levels consistent with previous reports. No implants were lost (overall survival: 100%) or found to fail (overall success: 100%). No significant intergroup differences were noted for any of the evaluated parameters. Immediate restorations in partially edentulous mandibles demonstrated successful clinical and radiographic 12-month results. Larger long-term prospective studies are needed to confirm the final evidence and predictability of immediate functional loading as a standard treatment concept for partially edentulous jaws. © 2013 Wiley Periodicals, Inc.

  19. Balloon Angioplasty for In-Stent Restenosis Resulting in Carotid Stent Fracture: Literature Review of Stent-in-Stent Technique as a Viable Therapeutic Option.

    Science.gov (United States)

    Naeem, Abdul-Haseeb; Al-Rumaihi, Ghaya; Namavarian, Amirpouyan; Sharma, Manas; Boulton, Melfort

    2017-05-01

    Carotid stent fractures are rare, and multiple etiologies have been proposed to explain their occurrence. We describe a patient with an internal carotid artery (ICA) stent who developed in-stent restenosis. We performed balloon angioplasty to address in-stent restenosis, but he developed a carotid stent fracture after the procedure. To our knowledge, balloon angioplasty has not been reported to cause stent fractures. A 72-year-old man underwent stent placement for symptomatic left ICA stenosis with residual stenosis of 55% after stent placement. He presented with transient ischemic attacks 2 months later, and work-up revealed in-stent restenosis of the left ICA. Given prior complete occlusion of right ICA and right vertebral artery and narrowing of left vertebral artery ostium, satisfactory balloon (5 × 40 mm) angioplasty was carried out. After balloon angioplasty, x-ray showed a new stent fracture, which was initially missed on immediate postoperative imaging. He presented 9 months later with symptoms of compromised cerebral perfusion. Work-up revealed the previously missed stent fracture causing blood flow changes. Peak systolic velocity in the left ICA was 383 cm/second. He underwent left ICA repeat stent placement via a stent-in-stent technique for symptomatic severe left ICA stenosis of 70% with 40% residual stenosis after new stent deployment. Balloon angioplasty to address in-stent restenosis can secondarily cause stent fractures. We provide evidence of successful management of stent fracture with recurrent in-stent stenosis by repeat stent placement via a stent-in-stent technique. Copyright © 2017 Elsevier Inc. All rights reserved.

  20. Strain gauge analysis of occlusal forces on implant prostheses at various occlusal heights.

    Science.gov (United States)

    Cho, Young-Eun; Park, Eun-Jin; Koak, Jai-Young; Kim, Seong-Kyun; Heo, Seong-Joo; Park, Ji-Man

    2014-01-01

    The purpose of this study was to evaluate and compare the strain development at different occlusal heights of an implant prosthesis and adjacent teeth through the use of strain gauges. A test model was constructed using autopolymerizing polyurethane resin, artificial composite resin teeth, and an implant gold crown in the mandibular first molar area. The resin block containing the implant and the gold crown was sectioned, and two expansion screws were attached perpendicular to the bottom of the resin block on the buccal and lingual sides. The expansion screws were turned to create a gap. Four groups were created based on the occlusal height of the implant gold crown. Three strain gauges were attached to the buccal surfaces of the mandibular right second premolar, implant gold crown, and second molar. Beef jerky, carrot, and bread were used as test foods. A universal testing machine was used to apply compressive forces of 300 N (beef jerky), 250 N (carrot), and 50 N (bread), and the occlusal force was measured in each group. With 300 N, occlusal forces were concentrated on the adjacent teeth when the occlusal height of the implant prosthesis decreased. With 250 and 50 N, when the occlusal height of the implant prosthesis increased, the occlusal force applied to the implant prosthesis increased, but alterations in the implant crown height had little effect on the adjacent teeth. Different amounts of strain in the implant prosthesis and adjacent teeth were recorded depending on the occlusal height of the prosthesis. With 250 or 50 N of force, an increased prosthesis height affected the implant itself. With 300 N of force, decreased occlusal height of the prosthesis resulted in increased force on the adjacent teeth.

  1. National Report France: The French Balloon Programme 2013-2016

    Science.gov (United States)

    Dubourg, V.; Vassaux, D.; Vargas, A.; Cocquerez, P.; Louvel, S.; Douchin, F.; Saccocio, M.; Mirc, F.

    2015-09-01

    With over 50 years' experience in the field, the French Centre National dEtudes Spatiales (CNES) goes on supporting a significant scientific ballooning program. In particular so because balloons still give a unique access to near space science. Over the past 6 years, most of the systems, beginning by the Zero Pressure Balloons, had to be renewed to comply with more stringent Safety constraints and to growing performance and reliability requirements from the scientific missions. This paper will give an overview of the CNES new capabilities and services for operational balloon activities, and their availability status. The scientific launch campaigns of the past two years will be presented. A focus will be made on the results of the Stratoscience 2014 flight campaign from Timmins, Ontario, using the NOSYCA command and control system for zero pressure balloons, qualified in 2013. The ChArMEx campaign (Chemistry-AeRosol Mediterranean Experiment) performed in 2013 from the Baleares islands and from the south of France, with Boundary Layer Pressurized Balloons will also be presented as well as the LOAC-VOLTAIRE experiment, carried out from Aire-sur-l'Adour (France), through the flights of 20 instrumented light expandable balloons. An outlook of the new stratospheric long duration flight systems currently studied at CNES will be given. The scientific launch campaigns and the main payloads in the study for the near future will also be presented.

  2. A Survey of Titan Balloon Concepts and Technology Status

    Science.gov (United States)

    Hall, Jeffery L.

    2011-01-01

    This paper surveys the options for, and technology status of, balloon vehicles to explore Saturn's moon Titan. A significant amount of Titan balloon concept thinking and technology development has been performed in recent years, particularly following the spectacular results from the descent and landing of the Huygens probe and remote sensing observations by the Cassini spacecraft. There is widespread recognition that a balloon vehicle on the next Titan mission could provide an outstanding and unmatched capability for in situ exploration on a global scale. The rich variety of revealed science targets has combined with a highly favorable Titan flight environment to yield a wide diversity of proposed balloon concepts. The paper presents a conceptual framework for thinking about balloon vehicle design choices and uses it to analyze various Titan options. The result is a list of recommended Titan balloon vehicle concepts that could perform a variety of science missions, along with their projected performance metrics. Recent technology developments for these balloon concepts are discussed to provide context for an assessment of outstanding risk areas and technological maturity. The paper concludes with suggestions for technology investments needed to achieve flight readiness.

  3. Pneumatic impression: Improving dental arch impression with an inflatable balloon.

    Science.gov (United States)

    Gupta, Lokendra

    2016-01-01

    The purpose of this impression technique is to overcome the problem associated with restricted mouth opening in association with high arched palate by employing pneumatic impression technique using latex balloon. A stock tray was modified with auto polymerizing acrylic resin. On the modified tray, a latex balloon was attached with aid of cyanoacrylate. The outlet of the balloon was then connected to a clinical sphygmomanometer bulb with the rubber pipe for air passage which would aid in inflating the balloon. The prepared tray assembly was then equipped for recording the impression. An adequate amount of addition polysiloxane impression material, sufficient to cover the entire area of the balloon was loaded onto the tray. The balloon was then inflated with the help of a sphygmomanometer bulb which transferred the air only in one direction. On completion of setting time of the impression material, the air pressure was relieved by deflating of balloon which helped in the easy removal of the impression. The impression was subsequently removed from the oral cavity and disinfected. This novel technique was helpful for recording impression in patients presenting with restricted mouth opening and high arched palate.

  4. Closing a temporary ileostomy within two weeks.

    Science.gov (United States)

    Hindenburg, Tommy; Rosenberg, Jacob

    2010-06-01

    Temporary ileostomy is frequently constructed to relieve a rectal anastomosis and avoid peritonitis if the anastomosis is leaking. Ostomy is a burden for both the patient and society and early closure is therefore desirable to counteract increased morbidity. Several prospective studies and a single randomized controlled trial have shown that closure in less than two weeks was associated with lower or equal morbidity compared with later closure. Thus, current data support early closure of temporary ileostomy performed to cover rectal anastomosis in routine clinical practice.

  5. Nurses' perceptions of temporary nursing service agencies.

    Science.gov (United States)

    Sorrentino, E A; Simunek, L A

    1991-04-01

    Temporary staffing agencies have indeed carved out a role for themselves, and our free enterprise system lends itself to the perpetuation of the entrepreneurial spirit in all: nurses, agencies, and hospitals alike. It is wiser to learn to work with current structure realizing that supply and demand plays an important role in the survival and success of agencies. Although there are problems associated with temporary nursing staffing, they are surmountable. Orientation programs, performance monitoring, ensuring accountability of both nurse and agency are but a few that can enhance utilization and quality of service.

  6. The Falcon(TM) eccentric coronary balloon angioplasty catheter : A randomized safety and efficacy study

    NARCIS (Netherlands)

    Qureshi, N; denHeijer, P; vanBoven, AJ; Tio, R; deKam, PJ; Crijns, HJGM

    1997-01-01

    Percutaneous coronary angioplasty (PTCA) is usually performed using concentric shaped balloon catheters with the guidewire passing through the center of the shaft. The Falcon(TM) balloon catheter features a guide wire lumen on the outside of the balloon so that an eccentric balloon catheter profile

  7. Support of AFGL Balloon Telemetry System.

    Science.gov (United States)

    1980-09-30

    exception. The capabilities of the system can now logically occur to keep pace with the ever increasing sophistication of balloon bourne instrumentation. The...8217 I’kL m)J1)t Cr fac (A a Ciso ilUded in theI L蓑 llt (2i II i11t C for da&1t al 0 og Yi n1g ari1d pr1-o g ramIl ex chan1ge riled a. TheC (𔃺niJILtt’l...there are some ozenera I areajs which are felt to be logical and necessary advance- inents in the system cap~abilities: * Implement a computer based

  8. Management of intra-aortic balloon pumps.

    Science.gov (United States)

    Webb, Christopher A-J; Weyker, Paul D; Flynn, Brigid C

    2015-06-01

    Intra-aortic balloon pumps (IABPs) continue to be the most widely used cardiac support devices with an annual estimate of 200 000 IABPs placed worldwide. IABPs enhance myocardial function by maximizing oxygen supply and minimizing oxygen demand. The use of IABPs is not without risk, with major vascular injury, ischemia, and infection being the most common complications, especially in high-risk patients. While recent studies have questioned the use of IABPs in patients with cardiogenic shock secondary to myocardial infarction, these studies have limitations making it difficult to formulate definitive conclusions. This review will focus on the mechanisms of counterpulsation, the management of IABPs and the evidence supporting this ventricular support therapy. © The Author(s) 2014.

  9. Management of Intra-Aortic Balloon Pump Entrapment

    Science.gov (United States)

    Fitzmaurice, Gerard J.; Collins, Anton; Parissis, Haralambos

    2012-01-01

    An intra-aortic balloon pump is one of the most valuable tools in the cardiac surgeon's armament to assist in the management of the failing heart. Despite its widespread use, there are associated risks and complications, one of which is balloon rupture with associated entrapment. Numerous approaches for dealing with this complication have been described; here we review the previous experience with intra-aortic balloon pump entrapment and discuss potential management, with particular reference to a recent case of our own. PMID:23109753

  10. Intragastric balloon for morbid obesity causing chronic gastric dilatation

    Energy Technology Data Exchange (ETDEWEB)

    Pretolesi, F.; Derchi, L.E. [Dept. of Radiology, University of Genoa (Italy); Redaelli, G.; Papagni, L. [IRCCS, Ist. Auxologico Italiano, Milan (Italy)

    2001-04-01

    We describe the radiographic findings observed in a morbidly obese and diabetic patient with an intragastric air-filled balloon introduced as a therapeutic measure to reduce food intake. The balloon was associated with chronic gastric dilatation and had to be removed 3 months after insertion. However, together with diet and behavioural therapy, it proved effective in reducing body weight and ameliorating glycaemic control. Although rarely used, intragastric balloons for the treatment of morbid obesity are still encountered in radiological practice. Radiologists must be able to recognize them and to understand their complications. (orig.)

  11. Outcomes of peripheral perfusion with balloon aortic clamping for totally endoscopic robotic mitral valve repair.

    Science.gov (United States)

    Ward, Alison F; Loulmet, Didier F; Neuburger, Peter J; Grossi, Eugene A

    2014-12-01

    Although the technique of totally endoscopic robotic mitral valve repair (TERMR) has been well described, few reports have examined the results of peripheral perfusion with balloon clamping. We analyzed the outcomes of TERMR performed using this strategy. A total of 108 consecutive patients underwent TERMR by a 2-surgeon team. The preoperative evaluation included chest computed tomography and abdominal and pelvis computed tomography. Additional procedures included appendage exclusion in 96, patent foramen ovale closure in 29, cryoablation in 16, tricuspid valve repair in 2, and septal myectomy in 2. The mean patient age was 59 years (range, 21-86). Central venous drainage was obtained with a long cannula. Arterial return was achieved with femoral cannulation, when possible. An endoballoon catheter was placed through the femoral artery. Transesophageal echocardiography was used to position all catheters. Femoral artery perfusion was possible in 103 of 108 patients (95.3%). The subclavian artery was used in 5 patients (4.6%) with contraindications to retrograde perfusion. An endoballoon clamp was placed by way of the femoral artery. In 105 of 108 patients (97.2%), endoaortic occlusion was successfully used; the mean crossclamp time was 87.4 minutes. The coronary sinus cardioplegia catheter was placed successfully in 81 of the 108 patients (75%). Postoperatively, no or mild inotropic support was needed in 94 (87%) and moderate support in 14 (13.0%). Of the 108 patients, 55 (50.9%) were extubated in the operating room. No hospital mortality, aortic injury, vascular complications, or wound infections occurred. Complications included 2 strokes (no residual deficit) (1.8%) and atrial fibrillation in 18 (16.7%). The median hospital stay was 4 days. Eighty patients (74.1%) were discharged by postoperative day 5. A preoperative image-guided perfusion strategy and aortic balloon clamping permit routine TERMR with excellent myocardial preservation and minimal complications

  12. The Occipital Artery as an Alternative Donor for Low-Flow Bypass to Anterior Circulation After Internal Carotid Artery Occlusion Failure prior to Exenteration for an Atypical Cavernous Sinus Meningioma.

    Science.gov (United States)

    Hanakita, Shunya; Lenck, Stéphanie; Labidi, Moujahed; Watanabe, Kentaro; Bresson, Damien; Froelich, Sébastien

    2018-01-01

    In skull base tumors involving the cavernous sinus, indications for aggressive resection are sparse and must be carefully examined because of their invasiveness. With careful evaluation, techniques including internal carotid artery sacrifice with or without extracranial-intracranial bypass may still be an option in some cases. Moreover, previous surgery with the sacrifice of potential donor vessels requires adjusting the revascularization strategy. We describe an occipital artery-middle cerebral artery bypass before skull base tumor resection. A 47-year-old woman with a recurrent cavernous sinus meningioma was referred to our department. Because of tumor recurrence after radiotherapy and its rapid progression, radical resection, including part of the cavernous sinus, was planned. A balloon test occlusion was performed and showed good tolerance. An endovascular internal carotid artery occlusion was performed. The patient eventually experienced motor deficits and aphasia after surgery. Therefore, bypass surgery using an occipital artery-middle cerebral artery anastomosis was performed. The patient showed no exacerbation of symptoms after bypass surgery and subsequently underwent tumor resection. The reliability of balloon test occlusion in the management of giant aneurysms may not be similarly applicable to skull base tumors. If hypoperfusion symptoms occur after occlusion of the internal carotid artery, a surgical revascularization procedure should be considered because of the risk of ischemic stroke following tumor resection. For patients whose superficial temporal artery is not available, the occipital artery can be a valuable alternative donor for low-flow bypass. Copyright © 2017 Elsevier Inc. All rights reserved.

  13. [Effect of 2 methods of occlusion adjustment on occlusal balance and muscles of mastication in patient with implant restoration].

    Science.gov (United States)

    Wang, Rong; Xu, Xin

    2015-12-01

    To compare the effect of 2 methods of occlusion adjustment on occlusal balance and muscles of mastication in patients with dental implant restoration. Twenty patients, each with a single edentulous posterior dentition with no distal dentition were selected, and divided into 2 groups. Patients in group A underwent original occlusion adjustment method and patients in group B underwent occlusal plane reduction technique. Ankylos implants were implanted in the edentulous space in each patient and restored with fixed prosthodontics single unit crown. Occlusion was adjusted in each restoration accordingly. Electromyograms were conducted to determine the effect of adjustment methods on occlusion and muscles of mastication 3 months and 6 months after initial restoration and adjustment. Data was collected and measurements for balanced occlusal measuring standards were obtained, including central occlusion force (COF), asymmetry index of molar occlusal force(AMOF). Balanced muscles of mastication measuring standards were also obtained including measurements from electromyogram for the muscles of mastication and the anterior bundle of the temporalis muscle at the mandibular rest position, average electromyogram measurements of the anterior bundle of the temporalis muscle at the intercuspal position(ICP), Astot, masseter muscle asymmetry index, and anterior temporalis asymmetry index (ASTA). Statistical analysis was performed using Student 's t test with SPSS 18.0 software package. Three months after occlusion adjustment, parameters of the original occlusion adjustment method were significantly different between group A and group B in balanced occlusal measuring standards and balanced muscles of mastication measuring standards. Six months after occlusion adjustment, parameters of the original occlusion adjustment methods were significantly different between group A and group B in balanced muscles of mastication measuring standards, but was no significant difference in balanced

  14. Balloon-expandable stenting with and without coiling for wide-neck and complex aneurysms.

    Science.gov (United States)

    Zenteno, Marco; Modenesi Freitas, José Maria; Aburto-Murrieta, Yolanda; Koppe, Gelson; Machado, Elcio; Lee, Angel

    2006-12-01

    Wide-necked, saccular, dissecting, and fusiform intracranial aneurysms are poor coil retainers. Retention can be improved by parent-artery stenting across the aneurysm. We used a balloon-expandable stent and delivery system, intending to treat 38 aneurysms in 36 patients. Stents could not be advanced across the neck of 2 aneurysms near the ophthalmic artery origin. These cases were managed by temporary balloon remodeling and coiling. Stenting alone was done for 15 aneurysms, including 7 in vertebral artery V4 segments. Stenting with immediate or delayed coiling was done in 21 aneurysms. Stenting alone caused immediate and complete obliteration of 1 treated aneurysm (7%), subtotal obliteration in 13 treated (86%) aneurysms, and was associated with 1 failure. Stenting and coiling yielded a significantly better 57% complete obliteration rate, 43% subtotal obliteration, and no failures. There were 5 complications: 1 wire perforation, 2 cavernous-carotid-sinus fistulae, and 2 partial in-stent thromboses. All were controlled or cleared with no long-term sequelae or deaths. Contrast imaging at 1 to 12 months was available for 30 patients (13 stent-only, 17 stent-plus-coiling), demonstrating complete obliteration in 25 (83%) and subtotal obliteration in 5. A total of 7 stent-only aneurysms (4 V4s) were completely obliterated, and 3 (all V4s) were > or = 90% obliterated. Stenting and coiling through the wall of the stent resulted in 88% (15/17) complete obliteration when imaged 1 to 12 months after treatment. Stenting alone effectively closed off V4-segment wide-necked aneurysms but was inferior to stenting and coiling in less mobile vessels.

  15. Management of Benign Tracheal Stenosis by Small-diameter Tube-assisted Bronchoscopic Balloon Dilatation

    Directory of Open Access Journals (Sweden)

    Yi-Lin Liang

    2015-01-01

    Full Text Available Background: A limitation of bronchoscopic balloon dilatation (BBD is that airflow must be completely blocked for as long as possible during the operation. However, the patient often cannot hold his or her breath for a long period affecting the efficacy of the procedure. In this study, we used an extra-small-diameter tube to provide assisted ventilation to patients undergoing BBD and assessed the efficacy and safety of this technique. Methods: Bronchoscopic balloon dilatation was performed in 26 patients with benign tracheal stenosis using an extra-small-diameter tube. The tracheal diameter, dyspnea index, blood gas analysis results, and complications were evaluated before and after BBD. Statistical analyses were performed by SPSS version 16.0 for Windows (SPSS, Inc., Chicago, IL, USA. Results: Sixty-three BBD procedures were performed in 26 patients. Dyspnea immediately improved in all patients after BBD. The tracheal diameter significantly increased from 5.5 ± 1.5 mm to 13.0 ± 1.3 mm (P < 0.001, and the dyspnea index significantly decreased from 3.4 ± 0.8 to 0.5 ± 0.6 (P < 0.001. There was no significant change in the partial pressure of oxygen during the operation (before, 102.5 ± 27.5 mmHg; during, 96.9 ± 30.4 mmHg; and after, 97.2 ± 21.5 mmHg; P = 0.364, but there was slight temporary retention of carbon dioxide during the operation (before, 43.5 ± 4.2 mmHg; during, 49.4 ± 6.8 mmHg; and after, 40.1 ± 3.9 mmHg; P < 0.001. Conclusion: Small-diameter tube-assisted BBD is an effective and safe method for the management of benign tracheal stenosis.

  16. Crossing Total Occlusions : Navigating Towards Recanalization

    NARCIS (Netherlands)

    Sakes, A.; Regar, E.; Dankelman, J.; Breedveld, P.

    2016-01-01

    Chronic total occlusions (CTOs) represent the “last frontier” of percutaneous interventions. The main technical challenges lies in crossing the guidewire into the distal true lumen, which is primarily due to three problems: device buckling during initial puncture, inadequate visualization, and the

  17. Crossing Total Occlusions: Navigating Towards Recanalization

    NARCIS (Netherlands)

    A. Sakes (Aimée); E.S. Regar (Eveline); J. Dankelman (Jenny); P. Breedveld (Paul)

    2016-01-01

    textabstractChronic total occlusions (CTOs) represent the “last frontier” of percutaneous interventions. The main technical challenges lies in crossing the guidewire into the distal true lumen, which is primarily due to three problems: device buckling during initial puncture, inadequate

  18. Cilioretinal artery occlusion following intranasal cocaine insufflations

    Directory of Open Access Journals (Sweden)

    Balaji Kannan

    2011-01-01

    Full Text Available Cocaine is used to produce a euphoric effect by abusers, who may be unaware of the devastating systemic and ocular side effects of this drug. We describe the first known case of cilioretinal artery occlusion after intranasal cocaine abuse.

  19. Sealing Occlusal Dentin Caries in Permanent Molars

    DEFF Research Database (Denmark)

    Qvist, Vibeke; Borum, Mette Kit; Møller, Kirsten Dynes

    2017-01-01

    The purpose of this study was to investigate the possibility of postponing restorative intervention of manifest occlusal caries in young, permanent dentition by non-invasive sealing. This RCT-designed study included 521 occlusal lesions in 521 patients aged 6 to 17 y. Based on clinical and radiog......The purpose of this study was to investigate the possibility of postponing restorative intervention of manifest occlusal caries in young, permanent dentition by non-invasive sealing. This RCT-designed study included 521 occlusal lesions in 521 patients aged 6 to 17 y. Based on clinical...... longevity of sealings and restorations until retreatments, and 3) compare effectiveness of sealings and restorations to halt caries progression in sealed lesions and beneath restorations. Furthermore, we aimed to identify factors influencing longevity and the effectiveness of sealings and restorations.......001). The median survival time for sealings not replaced by restorations was 7.3 y (CI, 6.4 y to NA). Survival of sealings was increased in patients with low caries risk and/or excellent oral hygiene, second molars compared with first molars, and lesions not extending the middle one-third of the dentin. Survival...

  20. Combined central retinalartery and vein occlusion complicating ...

    African Journals Online (AJOL)

    Orbital Cellulitis is a dreaded ophthalmologic disease. Itmay destroy vision and the eye andmay even become life threatening. Often visual loss is the result of exposure and subsequent destruction of ocular tissue commonly the cornea and the uvea. We report a case of combined central retinal artery and vein occlusion ...

  1. Class II malocclusion occlusal severity description

    Directory of Open Access Journals (Sweden)

    Guilherme Janson

    2010-08-01

    Full Text Available OBJECTIVES: It is well known that the efficacy and the efficiency of a Class II malocclusion treatment are aspects closely related to the severity of the dental anteroposterior discrepancy. Even though, sample selection based on cephalometric variables without considering the severity of the occlusal anteroposterior discrepancy is still common in current papers. In some of them, when occlusal parameters are chosen, the severity is often neglected. The purpose of this study is to verify the importance given to the classification of Class II malocclusion, based on the criteria used for sample selection in a great number of papers published in the orthodontic journal with the highest impact factor. MATERIAL AND METHODS: A search was performed in PubMed database for full-text research papers referencing Class II malocclusion in the history of the American Journal of Orthodontics and Dentofacial Orthopedics (AJO-DO. RESULTS: A total of 359 papers were retrieved, among which only 72 (20.06% papers described the occlusal severity of the Class II malocclusion sample. In the other 287 (79.94% papers that did not specify the anteroposterior discrepancy severity, description was considered to be crucial in 159 (55.40% of them. CONCLUSIONS: Omission in describing the occlusal severity demands a cautious interpretation of 44.29% of the papers retrieved in this study.

  2. Cilioretinal artery occlusion following intranasal cocaine insufflations

    Science.gov (United States)

    Kannan, Balaji; Balaji, Vijayalakshmi; Kummararaj, Sherin; Govindarajan, Kummararaj

    2011-01-01

    Cocaine is used to produce a euphoric effect by abusers, who may be unaware of the devastating systemic and ocular side effects of this drug. We describe the first known case of cilioretinal artery occlusion after intranasal cocaine abuse. PMID:21836348

  3. Virtual occlusal definition for orthognathic surgery.

    Science.gov (United States)

    Liu, X J; Li, Q Q; Zhang, Z; Li, T T; Xie, Z; Zhang, Y

    2016-03-01

    Computer-assisted surgical simulation is being used increasingly in orthognathic surgery. However, occlusal definition is still undertaken using model surgery with subsequent digitization via surface scanning or cone beam computed tomography. A software tool has been developed and a workflow set up in order to achieve a virtual occlusal definition. The results of a validation study carried out on 60 models of normal occlusion are presented. Inter- and intra-user correlation tests were used to investigate the reproducibility of the manual setting point procedure. The errors between the virtually set positions (test) and the digitized manually set positions (gold standard) were compared. The consistency in virtual set positions performed by three individual users was investigated by one way analysis of variance test. Inter- and intra-observer correlation coefficients for manual setting points were all greater than 0.95. Overall, the median error between the test and the gold standard positions was 1.06mm. Errors did not differ among teeth (F=0.371, P>0.05). The errors were not significantly different from 1mm (P>0.05). There were no significant differences in the errors made by the three independent users (P>0.05). In conclusion, this workflow for virtual occlusal definition was found to be reliable and accurate. Copyright © 2015 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

  4. Virtual occlusion in planning orthognathic surgical procedures.

    NARCIS (Netherlands)

    Nadjmi, N.; Mollemans, W.; Daelemans, A.; Hemelen, G. Van; Schutyser, F.A.C.; Berge, S.J.

    2010-01-01

    Accurate preoperative planning is mandatory for orthognathic surgery. One of the most important aims of this planning process is obtaining good postoperative dental occlusion. Recently, 3D image-based planning systems have been introduced that enable a surgeon to define different osteotomy planes

  5. Clinical Aspects of Combination of Ceramic and Acrylic Occlusal Surfaces

    Directory of Open Access Journals (Sweden)

    Z. Ozhohan

    2017-03-01

    Full Text Available The objective of the research was to develop and substantiate the methods of constructing the occlusal surfaces when manufacturing aesthetic fixed restorations through the combination of different materials. Materials and methods. The study included 65 patients with ceramic and acrylic occlusal surfaces of aesthetic fixed dental prostheses. Group I included 21 patients with a combination of ceramic and acrylic occlusal surfaces. Group II included 22 patients with a combination of ceramic occlusal surfaces. Group III included 22 patients with a combination of acrylic occlusal surfaces. The patients were observed 3, 6 and 12 months after prosthetic repair. Results. The greatest increase in the occlusal contact surface area of fixed restorations was observed in Group I, that is, when combining dental prostheses with ceramic and acrylic occlusal surfaces. Considering uneven abrasion of the occlusal surfaces, we do not recommend to combine different materials when veneering the occlusal surface of the antagonistic teeth. Conclusions. This study demonstrated the important role of the correct combination of materials when veneering the occlusal surfaces. Physical and chemical properties of materials, namely the abrasion resistance play a significant role in the long-term denture functioning. The smallest increase in the occlusal contact surface area was observed in Group II when combining ceramic occlusal surfaces. It was due to a good abrasion resistance of ceramics as compared to acrylic resin as well as the presence of the glazed layer which prevents the premature abrasion of the occlusal surfaces of the antagonistic teeth due to lower surface roughness. The combination of acrylic resin and ceramics when constructing the occlusal surfaces of fixed restorations in Group I demonstrated the highest rate of the increase in the occlusal contact surface area – 9.93%. It was due to a low hardness of acrylic resin and its high surface roughness. In

  6. Canine-guide Occlusion and Group Function Occlusion are Equally Acceptable When Restoring the Dentition.

    Science.gov (United States)

    Miralles, Rodolfo

    2016-03-01

    Impact of lateral occlusion schemes: A systematic review. Abduo J, Tennant M. J Prosthet Dent 2015;114(2):193-204 SOURCE OF FUNDING: Not reported Systematic review. Copyright © 2016 Elsevier Inc. All rights reserved.

  7. 7 CFR 205.290 - Temporary variances.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Temporary variances. 205.290 Section 205.290 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Standards, Inspections, Marketing Practices), DEPARTMENT OF AGRICULTURE (CONTINUED) ORGANIC FOODS PRODUCTION ACT PROVISIONS NATIONAL ORGANIC PROGRAM Organic...

  8. Temporary Tattoos and Henna/Mehndi

    Science.gov (United States)

    ... For example, we can issue Import Alerts and Warning Letters. An Import Alert allows FDA to detain products that violate or ... Awareness of Safety: FDA Webinar, May 13, 2014 Warning Letter Issued to Black Henna Ink, Inc. Import Alert #53-14: Intensified Coverage of Temporary Tattoos Containing ...

  9. Closing a temporary ileostomy within two weeks

    DEFF Research Database (Denmark)

    Hindenburg, Tommy; Rosenberg, J.

    2010-01-01

    Temporary ileostomy is frequently constructed to relieve a rectal anastomosis and avoid peritonitis if the anastomosis is leaking. Ostomy is a burden for both the patient and society and early closure is therefore desirable to counteract increased morbidity. Several prospective studies and a sing...

  10. Temporary tattoos: a novel OSCE assessment tool.

    Science.gov (United States)

    Gormley, Gerry; Menary, Allison; Layard, Brooke; Hart, Nigel; McCourt, Collette

    2013-08-01

    There are many issues regarding the use of real patients in objective structured clinical examinations (OSCEs). In dermatology OSCE stations, standardised patients (SPs) with clinical photographs are often used. Temporary transfer tattoos can potentially simulate skin lesions when applied to an SP. This study aims to appraise the use of temporary malignant melanoma tattoos within an OSCE framework. Within an 11-station OSCE, a temporary malignant melanoma tattoo was developed and applied to SPs in a 'skin lesion' OSCE station. A questionnaire captured the opinions of the candidate, SP and examiners, and the degree of perceived realism of each station was determined. Standard post hoc OSCE analysis determined the psychometric reliability of the stations. The response rates were 95.9 per cent of candidates and 100 per cent of the examiners and SPs. The 'skin lesion' station achieved the highest realism score compared with other stations: 89.0 per cent of candidates felt that the skin lesion appeared realistic; only 28 per cent of candidates had ever seen a melanoma before in training. The psychometric performance of the melanoma station was comparable with, and in many instances better than, other OSCE stations. Transfer tattoo technology facilitates a realistic dermatology OSCE station encounter. Temporary tattoos, alongside trained SPs, provide an authentic, standardised and reliable experience, allowing the assessment of integrated dermatology clinical skills. © 2013 John Wiley & Sons Ltd.

  11. Closing a temporary ileostomy within two weeks

    DEFF Research Database (Denmark)

    Hindenburg, Tommy; Rosenberg, J.

    2010-01-01

    Temporary ileostomy is frequently constructed to relieve a rectal anastomosis and avoid peritonitis if the anastomosis is leaking. Ostomy is a burden for both the patient and society and early closure is therefore desirable to counteract increased morbidity. Several prospective studies and a single...

  12. 40 CFR 180.31 - Temporary tolerances.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 23 2010-07-01 2010-07-01 false Temporary tolerances. 180.31 Section 180.31 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS... period designed to allow the orderly marketing of the raw agricultural commodities produced while testing...

  13. Temporary Chinese Migration to Madagascar: Local Perceptions ...

    African Journals Online (AJOL)

    This article fills a knowledge-gap in the literature on China in Africa by exploring local perceptions of temporary Chinese migrants in Madagascar, the growth of small-scale Chinese-owned import and retail businesses in the capital, and their impacts on Malagasy producers, utilizing the country's blanket and paper industries ...

  14. Temporary Chinese Migration to Madagascar: Local Perceptions ...

    African Journals Online (AJOL)

    However, as public debate over their impact in Madagascar intensifies, the temporary Chinese migrant ... economic and political engagement of the continent. Following the .... all focus on either the earlier waves of migration or on the relations between the resident Chinese community and the new migrants. Notable ...

  15. 47 CFR 74.537 - Temporary authorizations.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Temporary authorizations. 74.537 Section 74.537 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO.... However, in the case of events of widespread interest and importance which cannot be transmitted...

  16. 47 CFR 74.633 - Temporary authorizations.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Temporary authorizations. 74.633 Section 74.633 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... wide-spread interest and importance which cannot be transmitted successfully on these frequencies...

  17. 47 CFR 74.833 - Temporary authorizations.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Temporary authorizations. 74.833 Section 74.833 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... interest and importance which cannot be transmitted successfully on these frequencies, frequencies assigned...

  18. 47 CFR 74.433 - Temporary authorizations.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Temporary authorizations. 74.433 Section 74.433 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES EXPERIMENTAL RADIO... of events of wide-spread interest and importance which cannot be transmitted successfully on these...

  19. Numeric simulation of occlusal interferences in molars restored with ultrathin occlusal veneers.

    Science.gov (United States)

    Magne, Pascal; Cheung, Raymond

    2017-01-01

    Selecting material for a minimally invasive occlusal veneer reconstruction concept requires an understanding of how stresses are distributed during functional and parafunctional forces. The purpose of this in vitro study was to investigate stress distribution in a maxillary molar restored with ultrathin occlusal veneers and subjected by an antagonistic mandibular molar to clenching and working and nonworking movements. A maxillary first molar was modeled from microcomputed tomography (micro-CT) data, using medical image processing software, stereolithography editing/optimizing software, and finite element software. Simulated ultrathin occlusal veneer materials were used. The mandibular molar antagonist was a solid nondeformable geometric entity. Loads simulated clenching, working, and nonworking movements with loading of 500 N. The values of the maximum principal stress were recorded. In the clenching load situation, maximum tensile stresses were located at the occlusal veneer (52 MPa for composite resin versus 47 MPa for ceramic). In the working movement, significant additional tensile stresses were found on the palatal root (87 MPa for composite resin and 85 MPa for ceramic). In the nonworking movement, tensile stress on the ultrathin occlusal veneer increased to 118 MPa for composite resin and 143 MPa for ceramic veneers. Tensile stress peaks shifted to the mesiobuccal root (75 MPa for composite resin and 74 MPa for ceramic). The topography of stresses generated by the various occlusal interferences were clearly identified. Significant tensile stress concentrations were found within the restoration's occlusal topography and root, with the nonworking interference being the most harmful and also the most revealing of the difference between the composite resin and ceramic ultrathin occlusal veneers. Copyright © 2016 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.

  20. Reversal of myopic Anisometropic amblyopia with occlusion therapy ...

    African Journals Online (AJOL)

    Objective: To report a reversal of myopic anisometropic amblyopia with occlusion therapy in a 25 year old. Design: Case report. Setting: Eye clinic of a University Teaching Hospital in a metropolitan city. Participant: an index patient. Intervention: Occlusion therapy. Main Outcome Measure: Post occlusion visual acuity.

  1. 21 CFR 878.4020 - Occlusive wound dressing.

    Science.gov (United States)

    2010-04-01

    ...) MEDICAL DEVICES GENERAL AND PLASTIC SURGERY DEVICES Surgical Devices § 878.4020 Occlusive wound dressing. (a) Identification. An occlusive wound dressing is a nonresorbable, sterile or non-sterile device... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Occlusive wound dressing. 878.4020 Section 878...

  2. Branded prescription drug fee. Final regulations, temporary regulations, and removal of temporary regulations.

    Science.gov (United States)

    2014-07-28

    This document contains final regulations that provide guidance on the annual fee imposed on covered entities engaged in the business of manufacturing or importing branded prescription drugs. This fee was enacted by section 9008 of the Patient Protection and Affordable Care Act, as amended by section 1404 of the Health Care and Education Reconciliation Act of 2010. This document also withdraws the Branded Prescription Drug Fee temporary regulations and contains new temporary regulations regarding the definition of controlled group that apply beginning on January 1, 2015. The final regulations and the new temporary regulations affect persons engaged in the business of manufacturing or importing certain branded prescription drugs. The text of the temporary regulations in this document also serves as the text of proposed regulations set forth in a notice of proposed rulemaking (REG-123286-14) on this subject in the Proposed Rules section in this issue of the Federal Register.

  3. 10 meter Sub-Orbital Large Balloon Reflector (LBR) Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Besides serving as a launch vehicle, the carrier balloon provides a stable mount for the enclosed telescope. Looking up, the LBR will serve as a telescope. Looking...

  4. SMEX02 Balloon-borne Radiosonde Data, Iowa

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set includes radiosonde measurements of upper air temperature and pressure, relative humidity, and wind direction and speed during the balloons' ascent to...

  5. Current status of intragastric balloon for obesity treatment.

    Science.gov (United States)

    Kim, Seung Han; Chun, Hoon Jai; Choi, Hyuk Soon; Kim, Eun Sun; Keum, Bora; Jeen, Yoon Tae

    2016-06-28

    Endoscopic bariatric therapy may be a useful alternative to pharmacological treatment for obesity, and it provides greater efficacy with lower risks than do conventional surgical procedures. Among the various endoscopic treatments for obesity, the intragastric balloon is associated with significant efficacy in body weight reduction and relief of comorbid disease symptoms. Anatomically, this treatment is based on gastric space-occupying effects that increase the feeling of satiety and may also affect gut neuroendocrine signaling. The simplicity of the intragastric balloon procedure may account for its widespread role in obesity treatment and its applicability to various degrees of obesity. However, advances in device properties and procedural techniques are still needed in order to improve its safety and cost-effectiveness. Furthermore, verification of the physiological outcomes of intragastric balloon treatment and the clinical predictive factors for treatment responses should be considered. In this article, we discuss the types, efficacy, safety, and future directions of intragastric balloon treatment.

  6. Experimental study of aerosol deposition in pulsating balloon structures.

    Science.gov (United States)

    Yue, G; Fadl, A; Barek, T; Zhang, Z; Major, J

    2009-02-01

    In this study, aerosol depositions within pulsating balloon structures are investigated. Cyclical motion of expansion and contraction of the balloon models are controlled by varying the surrounding vacuum pressures inside the air chamber. Balloons of various configurations are used to induce the air flows as well as to collect the deposited particles. The non-uniform distribution patterns of particle deposition inside the models are measured by fluorescence spectrophotometer. Different airflow rates are investigated. The objective of this study is to qualitatively investigate the phenomena of enhanced particle local deposition in pockets with moving wall conditions. It has been observed in the experiments that a particle deposition "hot spot" exists at the entrance of balloon model for almost all flow rates covered in the study and the moving boundary flow enhances the aerosol deposition significantly.

  7. Balloon valvuloplasty for severe mitral valve stenosis in pregnancy

    African Journals Online (AJOL)

    . Commerford, B. Levetan. Balloon Valvuloplasties for severe mitral stenosis were performed on 11 ... 140 patients each year with cardiac disease - an incidence of 0.5%. ... Department of Medicine, Groote Schuur Hospital and University of.

  8. Development of Venus Balloon Seismology Missions Through Earth Analog Experiments

    Science.gov (United States)

    Krishnamoorthy, S.; Komjathy, A.; Cutts, J. A.; Pauken, M. T.; Garcia, R. F.; Mimoun, D.; Jackson, J. M.; Kedar, S.; Smrekar, S. E.; Hall, J. L.

    2017-11-01

    The study of a planet’s seismic activity is central to the understanding of its internal structure. We discuss advances made through Earth analog testing for performing remote seismology on Venus using balloons floated in the mid-atmosphere.

  9. OCT evaluation of directional atherectomy compared to balloon angioplasty

    Energy Technology Data Exchange (ETDEWEB)

    Marmagkiolis, Konstantinos [Citizens Memorial Hospital Heart and Vascular Institute, Bolivar, MO (United States); Lendel, Vasili [Arkansas Heart Hospital, Peripheral Vascular Institute, Little Rock, AR (United States); Cilingiroglu, Mehmet, E-mail: mcilingiroglu@yahoo.com [Arkansas Heart Hospital, Peripheral Vascular Institute, Little Rock, AR (United States); Koc University, School of Medicine, Istanbul (Turkey)

    2015-09-15

    Directional atherectomy (DA) is one of the most commonly used modalities for the treatment of obstructive femoropopliteal peripheral arterial disease (PAD), especially in patients with large and calcified atherosclerotic plaques. The effect of directional atherectomy to the vascular wall compared to balloon angioplasty by optical coherence tomography (OCT) has not been previously described. We present the first case of OCT after directional atherectomy with SilverHawk followed by angiosculpt balloon angioplasty. - Highlights: • Directional atherectomy avoids the vascular mechanical damage caused by angioplasty balloons and the exposure of stent struts or the potential of stent fracture with stents. • OCT can accurately assess the effect of endovacular interventions to the vessel wall. • Although angiographic results after directional atherectomy are acceptable, OCT use demonstrated suboptimal improvement of the MLA requiring additional balloon angioplasty. • Longer studies are needed to define whether the improved OCT results with angioplasty compared to DA may offer better clinical outcomes.

  10. Puerperal uterine inversion managed by the uterine balloon ...

    African Journals Online (AJOL)

    Puerperal uterine inversion managed by the uterine balloon tamponade. Mariétou Thiam, Mouhamadou Mansour Niang, Lamine Gueye, Fatou Rachel Sarr, Marie Edouard Faye Diémé, Mamadou Lamine Cissé ...

  11. Balloon Pump with Floating Valves for Portable Liquid Delivery

    Directory of Open Access Journals (Sweden)

    Yuya Morimoto

    2016-03-01

    Full Text Available In this paper, we propose a balloon pump with floating valves to control the discharge flow rates of sample solutions. Because the floating valves were made from a photoreactive resin, the shapes of the floating valves could be controlled by employing different exposure patterns without any change in the pump configurations. Owing to the simple preparation process of the pump, we succeeded in changing the discharge flow rates in accordance with the number and length of the floating valves. Because our methods could be used to easily prepare balloon pumps with arbitrary discharge properties, we achieved several microfluidic operations by the integration of the balloon pumps with microfluidic devices. Therefore, we believe that the balloon pump with floating valves will be a useful driving component for portable microfluidic systems.

  12. SMEX02 Balloon-borne Radiosonde Data, Iowa, Version 1

    Data.gov (United States)

    National Aeronautics and Space Administration — This data set includes radiosonde measurements of upper air temperature and pressure, relative humidity, and wind direction and speed during the balloons' ascent to...

  13. Low Cost Variable Conductance Heat Pipe for Balloon Payload Project

    Data.gov (United States)

    National Aeronautics and Space Administration — While continuously increasing in complexity, the payloads of terrestrial high altitude balloons need a thermal management system to reject their waste heat and to...

  14. A comparison of Loon balloon observations and stratospheric reanalysis products

    National Research Council Canada - National Science Library

    Friedrich, Leon S; McDonald, Adrian J; Bodeker, Gregory E; Cooper, Kathy E; Lewis, Jared; Paterson, Alexander J

    2017-01-01

      Location information from long-duration super-pressure balloons flying in the Southern Hemisphere lower stratosphere during 2014 as part of X Project Loon are used to assess the quality of a number...

  15. Absence of Bacteria on Coronary Angioplasty Balloons from Unselected Patients

    DEFF Research Database (Denmark)

    Hansen, Gorm Mørk; Nilsson, Martin; Nielsen, Claus Henrik

    2015-01-01

    , and translocation of bacteria from the oral cavity to the coronary arteries may play a role in the development of coronary artery disease. Very few studies have used angioplasty balloons for in vivo sampling from diseased coronary arteries, and with varying results. Therefore, the aim of this study was to assess...... if bacterial DNA from primarily oral bacteria could be detected on coronary angioplasty balloons by use of an optimized sampling process combined with an internally validated sensitive polymerase chain reaction (PCR) assay. Coronary angioplasty balloons and control samples from a total of 45 unselected...... and purification steps, and demonstration of sensitivity levels of 25-125 colony forming units (CFU), we did not detect bacterial DNA from any of the coronary angioplasty balloons. A subsequent questionnaire indicated that the prevalence of periodontitis in the study cohort was at least 39.5%. Although coronary...

  16. Characterising argon-bomb balloons for high-speed photography

    CSIR Research Space (South Africa)

    Olivier, M

    2013-08-01

    Full Text Available -1 SABO 2013 TME Workshop Alkantpan Characterising Argon-bomb balloons for High-speed Photography M Olivier and FJ Mostert Landward Sciences, Defence Peace Safety and Security, CSIR, Meiring Naude Road, Pretoria, RSA. Abstract A...

  17. PS-OCT of occlusal and interproximal caries lesions viewed from occlusal surfaces

    Science.gov (United States)

    Ngaotheppitak, Patara; Darling, Cynthia L.; Fried, Daniel; Bush, Jeff; Bell, Steve

    2006-02-01

    Previous studies have demonstrated that Polarization Sensitive Optical Coherence Tomography (PS-OCT) can be used to image early dental caries. The primary objective of this study was to compare the measured reflectivity of natural occlusal caries lesions with the relative mineral loss measured using digital microradiography. There was excellent agreement between the increase in the integrated reflectivity in the perpendicular polarization axis of the PS-OCT system and the increase in the integrated mineral loss or lesion severity for occlusal lesions. Therefore, PS-OCT is ideally suited to image natural caries lesions in the important occlusal surfaces for the assessment of the lesion severity and activity. A secondary objective was to compare the performance of a new autocorrelator-based PS-OCT system employing a novel polarization-switching probe with our polarization-maintaining fiber based PS-OCT system, both operating at 1310-nm. The new PS-OCT system produced clean images with no artifacts and achieved high penetration depth. Yet a third objective was to determine if interproximal lesions can be imaged from the occlusal surface (from above) since interproximal lesions may only be accessible in vivo from buccal or lingual surfaces or from the occlusal surface. Simulated and natural interproximal caries lesions were imaged from the occlusal surfaces as long as there was no intervening dentin.

  18. Use of the intraosseous screw for unilateral upper molar distalization and found well balanced occlusion

    Directory of Open Access Journals (Sweden)

    Buyukyilmaz Tamer

    2006-11-01

    Full Text Available Abstract Background The aim of this study was to present a temporary anchorage device with intraosseous screw for unilateral molar distalization to make a space for the impacted premolar and to found well balanced occlusion in a case. Case presentation A 13-year-old male who have an impacted premolar is presented with skeletal Class I and dental Class 2 relationship. The screw was placed and immediately loaded to distalize the left upper first and second molar. The average distalization time to achieve an overcorrected Class I molar relationship was 3.6 months. There was no change in overjet, overbite, or mandibular plane angle measurements. Mild protrusion (0.5 mm of the upper left central incisor was also recorded. Conclusion Immediately loaded intraosseous screw-supported anchorage unit was successful in achieving sufficient unilateral molar distalization without anchorage loss. This treatment procedure was an alternative treatment to the extraction therapy.

  19. Small Research Balloons in a Physics Course for Education Majors

    Science.gov (United States)

    Bruhweiler, F. C.; Verner, E.; Long, T.; Montanaro, E.

    2013-12-01

    At The Catholic Univ. of America, we teach an experimental physics course entitled Physics 240: The Sun-Earth Connection, which is designed for the undergraduate education major. The emphasis is on providing hands-on experience and giving the students an exciting experience in physics. As part of this course, in the Spring 2013 semester, we instituted a project to plan, build, launch, and retrieve a small (~1.3 kg) research balloon payload. The payload flown was a small GPS unit that sent its position to an Internet site, a small wide-angle high-resolution video camera, and an analog refrigerator thermometer placed in the field of view of the camera. All data were stored on the camera sim-card. Students faced the problems of flying a small research balloon in the congested, densely populated Northeast Corridor of the US. They used computer simulators available on the Web to predict the balloon path and flight duration given velocities for the Jet Stream and ground winds, as well as payload mass and amount of helium in the balloon. The first flight was extremely successful. The balloon was launched 140 km NW of Washington DC near Hagerstown, MD and touched down 10 miles (16 km) NW of York, PA, within 1.6 km of what was predicted. The balloon reached 73,000 ft (22,000 m) and the thermometer indicated temperatures as low as -70 degrees Fahrenheit (-57 C) during the flight. Further balloon flights are planned in conjunction with this course. Additional exercises and experiments will be developed centered around these flights. Besides learning that science can be exciting, students also learn that science is not always easily predictable, and that these balloon flights give an understanding of many of problems that go into real scientific space missions. This project is supported in part by an educational supplement to NASA grant NNX10AC56G

  20. Prospects for infrasound bolide detections from balloon-borne platforms

    Science.gov (United States)

    Young, Eliot; Bowman, Daniel; Arrowsmith, Stephen; Boslough, Marc; Klein, Viliam; Ballard, Courtney; Lees, Jonathan

    2017-04-01

    We report on an experiment to assess whether balloon-borne instruments can improve sensitivities to bolides exploding in the Earth's atmosphere (essentially using the atmosphere as a witness plate to characterize the small end of the NEO (Near Earth Object) population). The CTBTO's infrasound network regularly detects infrasound disturbances caused by bolides, including the 15-FEB-2013 Chelybinsk impact. Balloon-borne infrasound sensors should have two important advantages over ground-based infrasound stations: there should be virtually no wind noise on a free-floating platform, and a sensor in the stratosphere should benefit from its location within the stratospheric duct. Balloon-borne sensors also have the disadvantage that the amplitude of infrasound waves will decrease as they ascend with altitude. To test the performance of balloon-borne sensors, we conducted an experiment on a NASA high altitude (35 km) balloon launched from Ft Sumner, NM on 28-SEP-2016. We were able to put two independent infrasound payloads on this flight. We arranged for three 3000-lb ANFO explosions to be detonated from Socorro, NM at 12:00, 14:00 and 16:29:59 MST. The first two explosions were detected from the NASA balloon, with the first explosion showing three separate waveforms arriving within a 25-s span. The peak-to-peak amplitude of the waveforms was about 0.06 Pa, and the cleanest microphone channel detected this waveform with an SNR greater than 20. A second balloon at 15 km altitude also detected the second explosion. We have signals from a dozen ground stations at various positions from Socorro to Ft Sumner. We will report on wave propagation models and how they compare with observations from the two balloons and the various ground-stations.

  1. The Hubble party balloon and the expanding universe

    Science.gov (United States)

    Zendri, G.; Rosi, T.; Oss, S.

    2016-09-01

    We show that the metaphor of the inflated balloon used to describe expanding space-time according to the Hubble law can be transformed into a simple laboratory experiment. We obtain, in terms of measured recession speeds and distances of ink dots drawn on a party balloon, easy renditions of various cosmological models, such as the static one and the Einstein-De Sitter universe.

  2. Temporary Employment and Perceived Employability: Mediation by Impression Management

    Science.gov (United States)

    De Cuyper, Nele; De Witte, Hans

    2010-01-01

    Perceived employability (PE) has been advanced as the upcoming resource for career development, particularly for temporary workers. The question is how temporary workers become employable. Our hypothesis is that temporary workers more than permanent workers use impression management to become employable, both on the internal and the external labor…

  3. 30 CFR 47.44 - Temporary, portable containers.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Temporary, portable containers. 47.44 Section... TRAINING HAZARD COMMUNICATION (HazCom) Container Labels and Other Forms of Warning § 47.44 Temporary, portable containers. (a) The operator does not have to label a temporary, portable container if he or she...

  4. 21 CFR 872.3770 - Temporary crown and bridge resin.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Temporary crown and bridge resin. 872.3770 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Prosthetic Devices § 872.3770 Temporary crown and bridge resin. (a) Identification. A temporary crown and bridge resin is a device composed of a material, such as...

  5. Occlusion Handling in Videos Object Tracking: A Survey

    Science.gov (United States)

    Lee, B. Y.; Liew, L. H.; Cheah, W. S.; Wang, Y. C.

    2014-02-01

    Object tracking in video has been an active research since for decades. This interest is motivated by numerous applications, such as surveillance, human-computer interaction, and sports event monitoring. Many challenges related to tracking objects still remain, this can arise due to abrupt object motion, changing appearance patterns of objects and the scene, non-rigid object structures and most significant are occlusion of tracked object be it object-to-object or object-to-scene occlusions. Generally, occlusion in object tracking occur under three situations: self-occlusion, inter-object occlusion by background scene structure. Self-occlusion occurs most frequently while tracking articulated objects when one part of the object occludes another. Inter-object occlusion occurs when two objects being tracked occlude each other whereas occlusion by the background occurs when a structure in the background occludes the tracked objects. Typically, tracking methods handle occlusion by modelling the object motion using linear and non-linear dynamic models. The derived models will be used to continuously predicting the object location when a tracked object is occluded until the object reappears. Example of these method are Kalman filtering and Particle filtering trackers. Researchers have also utilised other features to resolved occlusion, for example, silhouette projections, colour histogram and optical flow. We will present some result from a previously conducted experiment when tracking single object using Kalman filter, Particle filter and Mean Shift trackers under various occlusion situation in this paper. We will also review various other occlusion handling methods that involved using multiple cameras. In a nutshell, the goal of this paper is to discuss in detail the problem of occlusion in object tracking and review the state of the art occlusion handling methods, classify them into different categories, and identify new trends. Moreover, we discuss the important

  6. Introduction (Special Issue on Scientific Balloon Capabilities and Instrumentation)

    Science.gov (United States)

    Gaskin, Jessica A.; Smith, I. S.; Jones, W. V.

    2014-01-01

    In 1783, the Montgolfier brothers ushered in a new era of transportation and exploration when they used hot air to drive an un-tethered balloon to an altitude of 2 km. Made of sackcloth and held together with cords, this balloon challenged the way we thought about human travel, and it has since evolved into a robust platform for performing novel science and testing new technologies. Today, high-altitude balloons regularly reach altitudes of 40 km, and they can support payloads that weigh more than 3,000 kg. Long-duration balloons can currently support mission durations lasting 55 days, and developing balloon technologies (i.e. Super-Pressure Balloons) are expected to extend that duration to 100 days or longer; competing with satellite payloads. This relatively inexpensive platform supports a broad range of science payloads, spanning multiple disciplines (astrophysics, heliophysics, planetary and earth science.) Applications extending beyond traditional science include testing new technologies for eventual space-based application and stratospheric airships for planetary applications.

  7. [Latex covering and mechanical analysis of balloon expandable stents].

    Science.gov (United States)

    Marty, B; von Segesser, L K; Carrel, T; Turina, M

    1996-01-01

    To the moment a few stents of metallic coils or meshes are available with a sealing coverage. In the present study balloon-expandable stents have been covered with a thin layer of natural rubber latex. The physical properties of these impervious stents were compared to the conventional stents. The expansion, the loss of expansion and the deformity during and after balloon inflation have been analyzed. In the pressure zone of 4-6 bar the mechanical characteristics of the impervious stents were similar to the conventional stents. The stents were expanded at 100% related on the balloon diameter used for expansion. Additional pressure of 1 bar was necessary to expand the impervious stents. At balloon pressure below 4 bar the stents tied the balloons in the midzone. The impervious stents, expanded at 6, 8 and 10mm, underwent a loss of expansion of 10% after withdrawal of the balloons. Their configuration was barrel-shaped (4% central enlargement) due to the latex rubber, constricting the wire meshes at both ends. These preliminary results are encouraging and allow further investigations.

  8. The Effect of Hypothermia on Prolonged Distal Aortic Balloon Occlusion in a Porcine Model (Sus scrofa) of Hemorrhage

    Science.gov (United States)

    2017-06-12

    significant differences between groups at baseline or after hemorrhage. No histologic differences were observed in hind limb skeletal muscle . Maximum...Conclusion: External cooling during prolonged zone III REBOA decreased ischemic muscle injury and resulted in lower compartment pressures following...Objectives: We hypothesized that simple external cooling of the hind limbs would decrease ischemia-reperfusion injury following prolonged zone III

  9. Partial Resuscitative Endovascular Balloon Occlusion of the Aorta (P-REBOA) in a Pig Model (Sus scrofa)

    Science.gov (United States)

    2015-09-10

    procedure to limit exsanguination is unclear. We evaluated the impact of P-REBOA on immediate survival in a highly lethal swine liver injury model...Methods: Fifteen Yorkshire-cross swine were anesthetized, instrumented, splenectomized, and subjected to 30 liver amputation . Coagulopathy was created

  10. Proximal balloon occlusion versus distal filter protection in carotid artery stenting: A meta-analysis and review of the literature.

    Science.gov (United States)

    Omran, Jad; Mahmud, Ehtisham; White, Christopher J; Aronow, Herbert D; Drachman, Douglas E; Gray, William; Abdullah, Obai; Abu-Fadel, Mazen; Firwana, Belal; Mishkel, Gergory; Al-Dadah, Ashraf S

    2017-04-01

    Carotid artery stenting (CAS) is typically performed using embolic protection devices (EPDs) as a means to reduce the risk of procedure-related stroke. In this study, we compared procedural morbidity and mortality associated with distal (D-EPD) vs. proximal (P-EPD) protection. MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials were queried from January 1998 through May 2015. Only studies comparing (D-EPD) and (P-EPD) were included. Two independent reviewers selected and appraised studies and extracted data in duplicate. Random-effects meta-analysis was used to pool outcomes across studies. Heterogeneity of treatment effect among studies was assessed using the I2 statistics. Publication bias was assessed using inspection of funnel plots. The primary endpoints included 30-day mortality and stroke. Secondary endpoints included new cerebral lesions on diffusion-weighted magnetic resonance imaging (DW-MRI) and contralateral lesions on DW-MRI. A total of 12,281 patients were included from 18 studies (13 prospective and 5 retrospective) comparing (D-EPD) and (P-EPD) in the setting of CAS. The mean patient age was 69 years and 64% of patients were male. No evidence of publication bias was detected. There was no significant difference between the two modalities in terms of the risk of stroke (risk difference [RD] 0.0, 95% confidence interval [CI] -0.01 to 0.01) or mortality (RD 0.0, 95% CI -0.01 to 0.01) nor was there any difference in the incidence of new cerebral lesions on DW-MRI or contralateral DW-MRI lesions. In patients undergoing CAS, both D-EPD and P-EPD provide similar levels of protection from peri-procedural stroke and 30 days mortality. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  11. Catching Comet's Particles in the Earth's Atmosphere by Using Balloons

    Science.gov (United States)

    Potashko, Oleksandr; Viso, Michel

    The project is intended to catch cometary particles in the atmosphere by using balloons. The investigation is based upon knowledge that the Earth crosses the comet’s tails during the year. One can catch these particles at different altitudes in the atmosphere. So, we will be able to gradually advance in the ability to launch balloons from low to high altitudes and try to catch particles from different comet tails. The maximum altitude that we have to reach is 40 km. Both methods - distance observation and cometary samples from mission Stardust testify to the presence of organic components in comet’s particles. It would be useful to know more details about this organic matter for astrobiology; besides, the factor poses danger to the Earth. Moreover, it is important to prove that it is possible to get fundamental scientific results at low cost. In the last 5 years launching balloons has become popular and this movement looks like hackers’ one - as most of them occur without launch permission to airspace. The popularity of ballooning is connected with low cost of balloon, GPS unit, video recording unit. If you use iPhone, you have a light solution with GPS, video, picture and control function in one unit. The price of balloon itself begins from $50; it depends on maximum altitude, payload weight and material. Many university teams realized balloon launching and reached even stratosphere at an altitude of 33 km. But most of them take only video and picture. Meanwhile, it is possible to carry out scientific experiments by ballooning, for example to collect comet particles. There is rich experience at the moment of the use of mineral, chemical and isotopic analysis techniques and data of the comet’s dust after successful landing of StarDust capsule with samples in 2006. Besides, we may use absolutely perfect material to catch particles in the atmosphere, which was used by cosmic missions such as Stardust and Japanese Hayabusa. As to balloon launches, we could use

  12. 77 FR 71825 - Notice of Temporary Restriction of Vehicle Use and Temporary Closure to Tree Cutting and Wood...

    Science.gov (United States)

    2012-12-04

    ...: 14X1125] Notice of Temporary Restriction of Vehicle Use and Temporary Closure to Tree Cutting and Wood... harvesting and/or tree cutting on public land within the Topaz Ranch Estates (TRE) and Preacher fires burn... and a temporary closure to tree cutting and wood collecting on areas burned by the TRE and Preacher...

  13. Transjugular Intrahepatic Portosystemic Shunt Flow Reduction with Adjustable Polytetrafluoroethylene-Covered Balloon-Expandable Stents Using the “Sheath Control” Technique

    Energy Technology Data Exchange (ETDEWEB)

    Blue, Robert C., E-mail: Robert.c.blue@gmail.com; Lo, Grace C.; Kim, Edward; Patel, Rahul S.; Scott Nowakowski, F.; Lookstein, Robert A.; Fischman, Aaron M. [Icahn School of Medicine at Mount Sinai, Interventional Radiology Section, Department of Radiology (United States)

    2016-06-15

    PurposeA complication of transjugular intrahepatic portosystemic shunts (TIPS) placement is refractory portosystemic encephalopathy (PSE) often requiring TIPS reduction. We report the results of a “sheath control technique” utilizing constraining sheaths during deployment of polytetrafluoroethylene (PTFE)-covered balloon-expandable stents, minimizing stent migration, and providing additional procedural control.MethodsTIPS reduction was performed in 10 consecutive patients for PSE using Atrium iCast covered stents (Atrium Maquet Getinge Group, Germany). Within the indwelling TIPS stent, a 9 mm × 59 mm iCast stent was deployed with 2 cm exposed from the sheath’s distal end and the majority of the stent within the sheath to create the distal hourglass shape. During balloon retraction, the stent was buttressed by the sheath. The proximal portion of the stent was angioplastied to complete the hourglass configuration, and the central portion of the stent was dilated to 5 mm. Demographics, pre- and post-procedure laboratory values, and outcomes were recorded.ResultsTen patients underwent TIPS reduction with 100 % technical success. There was no stent migration during stent deployment. All patients experienced initial improvement of encephalopathy. One patient ultimately required complete TIPS occlusion for refractory PSE, and another developed TIPS occlusion 36 days post-procedure. There was no significant trend toward change in patients’ MELD scores immediately post-procedure or at 30 days (p = 0.46, p = 0.47, respectively).ConclusionTIPS reduction using Atrium iCast PTFE balloon-expandable stents using the “sheath control technique” is safe and effective, and minimizes the risk of stent migration.

  14. Restoration of posterior teeth using occlusal matrix technique

    Directory of Open Access Journals (Sweden)

    Martos Josue

    2010-01-01

    Full Text Available This article describes a technique for duplicating occlusal surface anatomy using the Biteperf device. Duplication requires an intact occlusal enamel surface and is only indicated when caries lesions are hidden. The occlusal matrix technique allows for preservation of all anatomic details. When the last layer of composite has been placed, the occlusal matrix is forced into the uncured composite to replicate the original occlusal surface, instead of performing manual curing and shaping as in the standard approach. It is technically possible to achieve this effect with any material that is able to copy anatomic details. The main benefits of the occlusal matrix technique, more precisely the Biteperf, are the technical ease of use due to its simplicity and its high accuracy in reconstructing occlusal morphology.

  15. Concepts of occlusion in prosthodontics: A literature review, part I

    Directory of Open Access Journals (Sweden)

    V Rangarajan

    2015-01-01

    Full Text Available Occlusion and its relationship to the function of the stomatognathic system have been widely studied in dentistry since many decades. This series of articles describe about occlusion in the complete denture, fixed partial denture, and implants. Part I and II of this articles series describe concepts and philosophies of occlusion in complete denture. So far, available research has not concluded a superior tooth form or occlusal scheme to satisfy the requirements of completely edentulous patients with respect to comfort, mastication, phonetics, and esthetics. Since then, several balanced and nonbalanced articulation concepts were proposed in the literature. A balanced articulation appears to be most appropriate because of tooth contacts observed during nonfunctional activities of patients. This article discusses about evolution of different concepts of occlusion and occlusal schemes in complete denture occlusion.

  16. Burn Injury Arise From Flying Balloon Toys

    Directory of Open Access Journals (Sweden)

    Yalcin Kulahci

    2007-08-01

    Full Text Available Many of peoples are faced minor or major burn injuries in their life. Even the most widespread burn cause is flame injuries, too different burn cause pointed out in literature like Acetylen burns. The cases which imply in literature, mostly causes from explosion of high pressure acetylene tube, metal oxygene patch flame or carbide lamp using from cave explorers. An interesting acetylene burn cause in Turkey was publised by the authors. This cases was to come into being from flying toy balloons flame. 80 person was injured from flying toy ballons flame in a meeting in 2002. Although this potential risks of acetylene, helium have not any of some risk. But helium was provided from other countries and have more price. The injuries which caused from acetylene burns like 1st -2nd degree burns. Consequently that was known helium is more avaliable for using in toy sector, and never cause burn injuries like this. [TAF Prev Med Bull. 2007; 6(4: 291-296

  17. Controlled weather balloon ascents and descents for atmospheric research and climate monitoring

    Science.gov (United States)

    Kräuchi, Andreas; Philipona, Rolf; Romanens, Gonzague; Hurst, Dale F.; Hall, Emrys G.; Jordan, Allen F.

    2016-03-01

    In situ upper-air measurements are often made with instruments attached to weather balloons launched at the surface and lifted into the stratosphere. Present-day balloon-borne sensors allow near-continuous measurements from the Earth's surface to about 35 km (3-5 hPa), where the balloons burst and their instrument payloads descend with parachutes. It has been demonstrated that ascending weather balloons can perturb the air measured by very sensitive humidity and temperature sensors trailing behind them, particularly in the upper troposphere and lower stratosphere (UTLS). The use of controlled balloon descent for such measurements has therefore been investigated and is described here. We distinguish between the single balloon technique that uses a simple automatic valve system to release helium from the balloon at a preset ambient pressure, and the double balloon technique that uses a carrier balloon to lift the payload and a parachute balloon to control the descent of instruments after the carrier balloon is released at preset altitude. The automatic valve technique has been used for several decades for water vapor soundings with frost point hygrometers, whereas the double balloon technique has recently been re-established and deployed to measure radiation and temperature profiles through the atmosphere. Double balloon soundings also strongly reduce pendulum motion of the payload, stabilizing radiation instruments during ascent. We present the flight characteristics of these two ballooning techniques and compare the quality of temperature and humidity measurements made during ascent and descent.

  18. New Endovascular Technique to Prevent Distal Embolism for Iliofemoral Occlusive Disease: Reverse Flow Aspiration With Proximal Sheath Blockage.

    Science.gov (United States)

    Soga, Yoshimitsu; Tomoi, Yusuke; Hiramori, Seiichi; Murata, Naotaka; Kobayashi, Yohei; Ichihashi, Kei; Aodo, Kenji

    2017-08-01

    To report the safety and efficacy of a new technique to prevent distal embolism during treatment of iliofemoral occlusions: reverse flow aspiration with proximal sheath blockage (ReFLAP). Between October 2013 and December 2014, 90 patients (mean age 74 years; 66 men) were prospectively enrolled in a study to evaluate the ReFLAP technique during treatment of 110 occlusions in the iliac artery (72, 65%) or superficial femoral artery (SFA; 38, 35%). The mean occlusion lengths of iliac and SFA lesions were 79 and 179 mm, respectively. The concept of ReFLAP is to aspirate debris after balloon dilation using reverse flow through collaterals without antegrade flow. The main endpoints were the incidence of distal embolization, amputation, complications, and the ReFLAP capture rate, which was visually estimated during aspiration using 4 prespecified grades (0, none; 1, foamy debris; 2, small particles; 3, massive particles). ReFLAP was successful in 105 (95.4%) of the 110 lesions attempted; the 5 failures were due to severe vessel tortuosity or calcification. The incidences of distal embolization and amputation were both 0. Minor complications unrelated to ReFLAP were observed in 8 patients. The ReFLAP procedure aspirated debris in 57 (54%) of the 105 lesions. Aspirated material, including marked clots (grades 2 and 3), was confirmed in 40 (38%) of the lesions. The distribution of aspiration grades was significantly different between iliac and SFA lesions (p=0.02). Our results suggest that the ReFLAP endovascular technique to prevent distal embolization during iliofemoral occlusive disease treatment is simple, safe, and effective.

  19. Handling Occlusions for Robust Augmented Reality Systems

    Directory of Open Access Journals (Sweden)

    Madjid Maidi

    2010-01-01

    Full Text Available In Augmented Reality applications, the human perception is enhanced with computer-generated graphics. These graphics must be exactly registered to real objects in the scene and this requires an effective Augmented Reality system to track the user's viewpoint. In this paper, a robust tracking algorithm based on coded fiducials is presented. Square targets are identified and pose parameters are computed using a hybrid approach based on a direct method combined with the Kalman filter. An important factor for providing a robust Augmented Reality system is the correct handling of targets occlusions by real scene elements. To overcome tracking failure due to occlusions, we extend our method using an optical flow approach to track visible points and maintain virtual graphics overlaying when targets are not identified. Our proposed real-time algorithm is tested with different camera viewpoints under various image conditions and shows to be accurate and robust.

  20. Photometric Ambient Occlusion for Intrinsic Image Decomposition.

    Science.gov (United States)

    Hauagge, Daniel; Wehrwein, Scott; Bala, Kavita; Snavely, Noah

    2016-04-01

    We present a method for computing ambient occlusion (AO) for a stack of images of a Lambertian scene from a fixed viewpoint. Ambient occlusion, a concept common in computer graphics, characterizes the local visibility at a point: it approximates how much light can reach that point from different directions without getting blocked by other geometry. While AO has received surprisingly little attention in vision, we show that it can be approximated using simple, per-pixel statistics over image stacks, based on a simplified image formation model. We use our derived AO measure to compute reflectance and illumination for objects without relying on additional smoothness priors, and demonstrate state-of-the art performance on the MIT Intrinsic Images benchmark. We also demonstrate our method on several synthetic and real scenes, including 3D printed objects with known ground truth geometry.

  1. Handling Occlusions for Robust Augmented Reality Systems

    Directory of Open Access Journals (Sweden)

    Maidi Madjid

    2010-01-01

    Full Text Available Abstract In Augmented Reality applications, the human perception is enhanced with computer-generated graphics. These graphics must be exactly registered to real objects in the scene and this requires an effective Augmented Reality system to track the user's viewpoint. In this paper, a robust tracking algorithm based on coded fiducials is presented. Square targets are identified and pose parameters are computed using a hybrid approach based on a direct method combined with the Kalman filter. An important factor for providing a robust Augmented Reality system is the correct handling of targets occlusions by real scene elements. To overcome tracking failure due to occlusions, we extend our method using an optical flow approach to track visible points and maintain virtual graphics overlaying when targets are not identified. Our proposed real-time algorithm is tested with different camera viewpoints under various image conditions and shows to be accurate and robust.

  2. RTSAH Traversal Order for Occlusion Rays

    KAUST Repository

    Ize, Thiago

    2011-04-01

    We accelerate the finding of occluders in tree based acceleration structures, such as a packetized BVH and a single ray kd-tree, by deriving the ray termination surface area heuristic (RTSAH) cost model for traversing an occlusion ray through a tree and then using the RTSAH to determine which child node a ray should traverse first instead of the traditional choice of traversing the near node before the far node. We further extend RTSAH to handle materials that attenuate light instead of fully occluding it, so that we can avoid superfluous intersections with partially transparent objects. For scenes with high occlusion, we substantially lower the number of traversal steps and intersection tests and achieve up to 2× speedups. © 2010 The Author(s).

  3. Nontraumatic vascular emergencies: imaging and intervention in acute venous occlusion

    Energy Technology Data Exchange (ETDEWEB)

    Haage, Patrick; Schmitz-Rode, Thomas [Department of Diagnostic Radiology, University of Technology Aachen, Pauwelsstrasse 30, 52057 Aachen (Germany); Krings, Timo [Department of Neuroradiology, University of Technology Aachen, Pauwelsstrasse 30, 52057 Aachen (Germany)

    2002-11-01

    Risk factors for acute venous occlusion range from prolonged immobilization to hypercoagulability syndromes, trauma, and malignancy. The aim of this review article is to illustrate the different imaging options for the diagnosis of acute venous occlusion and to assess the value of interventional strategies for venous thrombosis treatment in an emergency setting. First, diagnosis and treatment of the most common form of venous occlusion, at the level of the lower extremities, is presented, followed by pelvic vein and inferior vena cava occlusion, mesenteric venous thrombosis, upper extremity occlusion, acute cerebral vein thrombosis, and finally acute venous occlusion of hemodialysis access. In acute venous occlusion of the lower extremity phlebography is still the reference gold standard. Presently, duplex ultrasound with manual compression is the most sensitive and specific noninvasive test. Limitations of ultrasonography include isolated distal calf vein occlusion, obesity, and patients with lower extremity edema. If sonography is nondiagnostic, venography should be considered. Magnetic resonance venography can differentiate an acute occlusion from chronic thrombus, but because of its high cost and limited availability, it is not yet used for the routine diagnosis of lower extremity venous occlusion only. Regarding interventional treatment, catheter-directed thrombolysis can be applied to dissolve thrombus in charily selected patients with symptomatic occlusion and no contraindications to therapy. Acute occlusion of the pelvic veins and the inferior vena cava, often due to extension from the femoropopliteal system, represents a major risk for pulmonary embolism. Color flow Doppler imaging is often limited owing to obesity and bowel gas. Venography has long been considered the gold standard for identifying proximal venous occlusion. Both CT scanning and MR imaging, however, can even more accurately diagnose acute pelvis vein or inferior vena cava occlusion. MRI is

  4. Depicting Occlusion in Early Renaissance Art

    OpenAIRE

    Barbara Gillam

    2011-01-01

    The artist attempting to give the impression of three-dimensional relationships must convey somehow that one surface is in front of another. There is a large and venerable literature in Psychology on this subject, showing how figure-ground, border ownership and amodal completion and continuation are determined but there is almost no discussion of how artist's have recruited these and other principles to create convincing impressions of occlusion. Even Gombrich (Art & Illusion 1960) only consi...

  5. [Occlusive factor in development of urolithiasis complications].

    Science.gov (United States)

    Lopatkin, N A; Ianenko, E K; Rumiantsev, V B; Danilkov, A P

    1999-01-01

    Causes and mechanisms of complications in urolithiasis are analysed with a focus on the role of occlusion of the urinary tracts in the onset of pyoseptic complications. Most severe of them is bacteriotoxic shock which is hard to treat and dangerous for essential body functions. The priority of the treatment must be reestablishment of urine passage. Additional tools of the treatment include wide-spectrum antibiotics, efferent detoxication, electrochemical blood oxidation, hyperbaric oxygenation, UV blood radiation.

  6. [Correlation between the lower first permanent molar axis and the premature loss of temporary molars].

    Science.gov (United States)

    Petcu, Ana; Maxim, A; Haba, Danisia

    2009-01-01

    The aim of our study was to determine the impact of premature loss of temporary molars upon the longitudinal axis of the first permanent molar. The study sample was formed by 94 orthopanthomografies of child patients with premature loss of lower temporary molars (first or second) after clinical eruption of the first permanent molar. All panoramic radiographs have been realized with the same panoramic unit with 1.4% magnification coefficient and were analyzed using a standardized technique of tracing the images of teeth and bone on matte acetate paper. It was evaluated the angle between longitudinal axis of first permanent lower molar and occlusal plane. It was observed that premature loss of lower second deciduous molar modifies greater the vertical axis of first permanent molar (between 61 degrees and 79 degrees) then premature loss of first lower primary molar. This is perhaps because the loss of space in the case of premature exfoliation of first primary molar is due more to distal drift of canine then mesial drift of molars. The drift to mesial of first permanent molar is more accentuated proportional with the age at which appeared premature loss and so it is loss of leeway space.

  7. [Combination of a universal antidote and temporary skin substitute for chemical burns: Extended case report].

    Science.gov (United States)

    Liodaki, E; Schopp, B E; Lindert, J; Krämer, R; Kisch, T; Mailänder, P; Stang, F

    2015-09-01

    In this article we describe our experiences in the treatment of chemical burns with Diphoterine(®) solution and Suprathel(®) as a temporary skin substitute material, a treatment which in the past was not commonly used for this pattern of injuries. In the study period from October 2012 to December 2013 we treated five patients (four male and one female including two children and three adults) with chemical burns by decontamination with Diphoterine(®) and wound covering with Suprathel(®). The control group included five patients with similar injury patterns who were treated with Diphoterine(®) and occlusive wound dressings. No wound infections occurred in any of the five cases and no interactions were observed between Suprathel(®) and the chemical substance involved. In four cases the skin areas with IIa-IIb degree damage showed good wound healing and only slight scarring in the follow-up after 3 months and one of the five patients had to be treated surgically. Suprathel(®) can be used as a temporary skin substitute for the treatment of skin burns and is also available for the treatment of chemical burns.

  8. Temporary metallic stent placement in the treatment of refractory benign esophageal strictures: results and factors associated with outcome in 55 patients

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jin Hyoung; Kim, Kyung Rae; Shin, Ji Hoon; Lim, Jin-Oh [University of Ulsan College of Medicine, Asan Medical Center, Department of Radiology and Research Institute of Radiology, Seoul (Korea); Song, Ho-Young [University of Ulsan College of Medicine, Asan Medical Center, Department of Radiology and Research Institute of Radiology, Seoul (Korea)]|[University of Ulsan College of Medicine, Asan Medical Center, Department of Radiology, Seoul (Korea); Choi, Eugene K. [Weill Medical College of Cornell University, New York, NY (United States)

    2009-02-15

    The purpose of this study was to evaluate the effectiveness of temporary metallic stenting in 55 patients with treatment-resistant benign esophageal strictures and to identify factors associated with clinical outcomes. Under fluoroscopic guidance, covered retrievable stents were placed in 55 patients with benign esophageal strictures and were removed with retrieval hook 1 week to 6 months after placement. Stent placement was successful in all patients, and the mean dysphagia score was reduced from 2.8 to 1.3 (p<0.001). The most common complications were tissue hyperproliferation (31%), severe pain (24%), and stent migration (25%). During follow-up (mean: 38 months), recurrence of the stricture necessitating balloon dilation was seen in 38 (69%) of 55 patients. Maintained patency rates after temporary stenting at 1, 3, and 6 months and 1, 2, and 4 years were 58%, 43%, 38%, 33%, 26%, and 21%, respectively. In multivariate analysis, length (p=0.003) of the stricture was the only significant factor associated with maintained patency after temporary stenting. In conclusion, temporary metallic stenting for refractory benign esophageal strictures may be effective during the period of stent placement, but is disadvantaged by the high recurrence rates after stent removal, particularly in patients with a long length of stricture (>7cm). (orig.)

  9. Laser photocoagulation for retinal vein occlusion

    Directory of Open Access Journals (Sweden)

    K. A. Mirzabekova

    2015-03-01

    Full Text Available Retinal vein occlusion (RVO is one of the leading causes of permanent vision loss. In adults, central retinal vein occlusion (CRVO occurs in 1.8% while branch retinal vein occlusion (BRVO occurs in 0.2%. Treatment strategy and disease prognosis are determined by RVO type (ischemic/non-ischemic. Despite numerous studies and many current CRVO and BRVO treatment approaches, the management of these patients is still being debated. Intravitreal injections of steroids (triamcinolone acetate, dexamethasone and vascular endothelial growth factor (VEGF inhibitors (bevacizumab, ranibizumab were shown to be fairly effective. However, it is unclear whether anti-VEGF agents are reasonable in ischemic RVOs. Laser photocoagulation remains the only effective treatment of optic nerve head and/or retinal neovascularization. Laser photocoagulation is also indicated for the treatment of macular edema. Both threshold and sub-threshold photocoagulation may be performed. Photocoagulation performed with argon (514 nm, krypton (647 nm, or diode (810 nm laser for macular edema provides similar results (no significant differences. The treatment may be complex and include medication therapy and/or surgery. Medication therapy includes anti-aggregant agents and antioxidants, i.e., emoxypine which may be used in acute RVO as well as in post-thrombotic retinopathy. 

  10. Laser photocoagulation for retinal vein occlusion

    Directory of Open Access Journals (Sweden)

    K. A. Mirzabekova

    2015-01-01

    Full Text Available Retinal vein occlusion (RVO is one of the leading causes of permanent vision loss. In adults, central retinal vein occlusion (CRVO occurs in 1.8% while branch retinal vein occlusion (BRVO occurs in 0.2%. Treatment strategy and disease prognosis are determined by RVO type (ischemic/non-ischemic. Despite numerous studies and many current CRVO and BRVO treatment approaches, the management of these patients is still being debated. Intravitreal injections of steroids (triamcinolone acetate, dexamethasone and vascular endothelial growth factor (VEGF inhibitors (bevacizumab, ranibizumab were shown to be fairly effective. However, it is unclear whether anti-VEGF agents are reasonable in ischemic RVOs. Laser photocoagulation remains the only effective treatment of optic nerve head and/or retinal neovascularization. Laser photocoagulation is also indicated for the treatment of macular edema. Both threshold and sub-threshold photocoagulation may be performed. Photocoagulation performed with argon (514 nm, krypton (647 nm, or diode (810 nm laser for macular edema provides similar results (no significant differences. The treatment may be complex and include medication therapy and/or surgery. Medication therapy includes anti-aggregant agents and antioxidants, i.e., emoxypine which may be used in acute RVO as well as in post-thrombotic retinopathy. 

  11. Dental Occlusion and Ophthalmology: A Literature Review.

    Science.gov (United States)

    Marchili, Nicola; Ortu, Eleonora; Pietropaoli, Davide; Cattaneo, Ruggero; Monaco, Annalisa

    2016-01-01

    Stomatognathic system is strictly correlated to other anatomical regions; many studies investigated relationship between temporomandibular joint and posture, several articles describe cranio-facial pain from dental causes, such as trigger points. Until now less interest has been given to connections between dental occlusion and ophthalmology, even if they are important and involving. Clinical experience in dental practice claims that mandibular latero-deviation is connected both to eye dominance and to defects of ocular convergence. The trigeminal nerve is the largest and most complex of the twelve cranial nerves. The trigeminal system represents the connection between somitic structures and those derived from the branchial arches, collecting the proprioception from both somitic structures and oculomotor muscles. The intermedius nucleus of the medulla is a small perihypoglossal brainstem nucleus, which acts to integrate information from the head and neck and relays it on to the nucleus of the solitary tract where autonomic responses are generated. This intriguing neurophysiological web led our research group to investigate anatomical and functional associations between dental occlusion and vision. In conclusion, nervous system and functional pathways strictly connect vision and dental occlusion, and in the future both dentists and oculists should be more and more aware of this correlation for a better diagnosis and therapy.

  12. Dental occlusion and posture: an overview.

    Science.gov (United States)

    Michelotti, Ambra; Buonocore, Gerarda; Manzo, Paolo; Pellegrino, Gioacchino; Farella, Mauro

    2011-01-01

    In recent decades, it has been suggested that disorders of the masticatory system such as malocclusions, can influence whole body posture. A growing number of patients are seeking concomitant treatment for dental malocclusions and postural disorders. The aim of this overview is to critically analyze the relationship between dental occlusion and posture. A literature overview was carried out to analyze the association between "malocclusion" versus "head posture", "spine curvature", and "body sway". The studies showed that even if some associations have been found between occlusal factors and postural alterations, there is not enough scientific evidence to support a cause-effect relations. Most studies suffer from major flaws such as lack of control groups, failure to take into account for the possible confounders, inappropriate study design, and lack of sufficient reliability and validity of used diagnostic tests. On the basis of this overview, it is not advisable to perform occlusal and/or orthodontic treatment, especially if irreversible and expensive, to treat or prevent postural imbalances or alteration of spine curvatures. Copyright © 2011 Società Italiana di Ortodonzia SIDO. Published by Elsevier Srl. All rights reserved.

  13. A multiparametric analysis of occlusal and periodontal jaw reflex characteristics in young adults with normal occlusion.

    Science.gov (United States)

    Suda, S; Matsugishi, K; Seki, Y; Sakurai, K; Suzuki, T; Morita, S; Hanada, K; Hara, K

    1997-08-01

    Periodontal jaw reflex, duration of percussion sounds, tooth mobility, and time-moment analysis of occlusal contacts by the T-scan system was recorded in nine periodontally healthy volunteers. The results showed that (i) reflex responses to the pressure applied to the uppercentageral incisors in the lingolabial direction varied, depending on the background jaw-clenching force (BCF) of the same-sided first molars. The BCF levels to elicit excitatory reflexes were 6-8 Kgf, and inhibitory reflexes were clearly elicited with a BCF of 10 Kgf and beyond. (ii) Duration of percussion sounds via an occlusal sound analyser (4.73-4.84 mS: upper first molars, 4.89-5.00 mS: uppercentageral incisors) and tooth mobility using a 'Periotest' (3.3-3.5: upper first molars, 5.5-5.6: uppercentageral incisors) showed a normal value. (iii) The time moments of occlusal contacts were symmetrical toward the midsagittal axis of the occlusal plane. The centre of the anteroposterior occlusal contacts was located in the first molar regions.

  14. The University of Alberta High Altitude Balloon Program

    Science.gov (United States)

    Johnson, W.; Buttenschoen, A.; Farr, Q.; Hodgson, C.; Mann, I. R.; Mazzino, L.; Rae, J.; University of Alberta High Altitude Balloon Team

    2011-12-01

    The University of Alberta High Altitude Balloon (UA-HAB) program is a one and half year program sponsored by the Canadian Space Agency (CSA) that offers hands on experience for undergraduate and graduate students in the design, build, test and flight of an experimental payload on a high altitude balloon platform. Utilising low cost weather balloon platforms, and through utilisation of the CSA David Florida Laboratory for thermal-vacuum tests , in advance of the final flight of the payload on a NASA high altitude balloon platform. Collectively the program provided unique opportunities for students to experience mission phases which parallel those of a space satellite mission. The program has facilitated several weather balloon missions, which additionally provide educational opportunities for university students and staff, as well as outreach opportunities among junior and senior high school students. Weather balloon missions provide a cheap and quick alternative to suborbital missions; they can be used to test components for more expensive missions, as well as to host student based projects from different disciplines such as Earth and Atmospheric Sciences (EAS), Physics, and Engineering. In addition to extensive skills development, the program aims to promote recruitment of graduate and undergraduate students into careers in space science and engineering. Results from the UA-HAB program and the flight of the UA-HAB shielded Gieger counter payload for cosmic ray and space radiation studies will be presented. Lessons learned from developing and maintaining a weather balloon program will also be discussed. This project is undertaken in partnership with the High Altitude Student Platform, organized by Louisiana State University and the Louisiana Space Consortium (LaSpace), and sponsored by NASA, with the financial support of the Canadian Space Agency.

  15. Fallopian tube occlusion with a shape memory polymer device: evaluation in a rabbit model.

    Science.gov (United States)

    Tang, Shuai; Zhang, Chan-Yu; Huang, Mei-Na; Luo, Yan-Feng; Liang, Zhi-Qing

    2013-02-01

    The present study evaluates the feasibility of a shape memory polymer (SMP) device for fallopian tube occlusion in rabbits. The SMP contraceptive device is made of poly(dl-lactic acid)-based poly(urethane urea) SMP in the shape of a spiral cylinder that was 10 mm long and had a diameter of 2.6 mm. Using this device, bilateral transuterine fallopian tube occlusions were performed in 78 New Zealand white female rabbits. Forty-eight female rabbits (group 1) were chosen as the experimental group and were implanted with the SMP devices. The remaining 30 female rabbits (group 2) served as the control group, which only received an incision in the abdomen but no SMP device. Follow-up consisted of hysterosalpingography, histologic evaluation and contraceptive effect. In addition, the shape memory behavior and in vivo degradation characterization of the SMP device were observed in this study. Under heat (37 °C) stimulation, the temporary shape SMP device returned to its permanent shape within 60 s. The average weight loss percentage of SMP devices was 7.0% at 2 weeks and 72.5% at 12 weeks. The inflammatory reactions caused by SMP devices were aseptic and nonspecific at 2 and 12 weeks, respectively. The SMP device boundaries and the surrounding tissues were obscured by fiber hyperplasia in 11/12 tubes at 24 weeks. Hysterosalpingography showed an occluded fallopian tube of Group 1 in 6/6 rabbits at 12 weeks and 6/6 rabbits at 24 weeks. No pregnancy was found in all 18 rabbits of group 1 (contraceptive rate of 100%); all 20 rabbits in the control group were pregnant. Biodegradable and biocompatible SMP devices could provide reliable, instant and permanent tubal occlusion. Copyright © 2013 Elsevier Inc. All rights reserved.

  16. Fracture resistance of various temporary crown materials.

    Science.gov (United States)

    Yilmaz, Asude; Baydaş, Seyfettin

    2007-01-01

    The aim of this study was to evaluate the fracture resistance of various provisional crown materials using an in vitro model test system. In the present study polycarbonate crowns, prefabricated by the manufacturer (3M Polycarbonate Crown), and the temporary crowns, fabricated in the dental laboratory environment, were fabricated using bis-acryl composite (Protemp II), autopolymerizing PMMA resin (BISICO Temp S), and heat-polymerized PMMA resin (Major C&B-V Dentine). All temporary crowns were stored in distilled water for 24 hours at room temperature prior to testing. The crowns were seated on metal dies, fabricated from Cr-Co alloy (AZ Dental, Konstanz, Germany), and then tested using the indenter of a Hounsfield testing machine (Hounsfield Tensometer, Hounsfield Test Equipment, Raydon, England). The tip of the indenter was located at a position one-third of the way down the inciso-palatine surface at 135 masculine. The data were statistically analyzed for differences using one-way analysis of variance (ANOVA) and the Tukey HSD test (P polycarbonate crowns were significantly different from the BISICO Temp S, Protemp II, and Major C&B-V Dentine (P polycarbonate crowns may be preferable to the other types of temporary crowns used in this study.

  17. A rare instructive complication of balloon catheter fracture during percutaneous coronary intervention.

    Science.gov (United States)

    Nomura, Tetsuya; Higuchi, Yusuke; Kato, Taku; Keira, Natsuya; Tatsumi, Tetsuya

    2016-01-01

    The entrapment, fracture, and dislodgement of catheterization devices during percutaneous coronary intervention (PCI) are rare complications, for which cardiac surgery is sometimes required. Here, we encountered a rare but instructive case of balloon catheter fracture during PCI. Although there have been some reports of guidewire fracture in PCI, reports on balloon catheter fracture are very rare to our knowledge. A simulation test to examine the mechanism of balloon catheter fracture revealed that overuse of the balloon catheter, both for kissing balloon inflation and balloon anchor, was highly likely to have been the cause of the fracture.

  18. Balloon Dilatation for Corrosive Esophageal Strictures in Children: Radiologic and Clinical Outcomes

    Energy Technology Data Exchange (ETDEWEB)

    Youn, Byung Jae; Kim, Woo Sun; Cheon, Jung Eun; Kim, Wha Young; Shin, Su Mi; Kim, In One; Yeon, Kyung Mo [Seoul National University College of Medicine, Seoul (Korea, Republic of)

    2010-04-15

    We retrospectively evaluated the effectiveness of the esophageal balloon dilatation (EBD) in children with a corrosive esophageal stricture. The study subjects included 14 patients (M:F = 8:6, age range: 17-85 months) who underwent an EBD due to a corrosive esophageal stricture. The causative agents for the condition were glacial acetic acid (n = 9) and lye (n = 5). A total of 52 EBD sessions were performed in 14 patients (range 1-8 sessions). During the mean 15-month follow-up period (range 1-79 months), 12 patients (86%) underwent additional EBD due to recurrent esophageal stricture. Dysphagia improved after each EBD session and oral feeding was possible between EBD sessions. Long-term success (defined as dysphagia relief for at least 12 months after the last EBD) was achieved in two patients (14%). Temporary success of EBD (defined as dysphagia relief for at least one month after the EBD session) was achieved in 17 out of 52 sessions (33%). A submucosal tear of the esophagus was observed in two (4%) sessions of EBD. Only a limited number of children with corrosive esophageal strictures were considered cured by EBD. However, the outcome of repeated EBD was sufficient to allow the children to eat per os prior to surgical management.

  19. Predictors of Long-Term Outcomes After Drug-Eluting Balloon Angioplasty for Bare-Metal Stent Restenosis.

    Science.gov (United States)

    Hsieh, Ming-Jer; Huang, Yu-Chang; Yeh, Jih-Kai; Chen, Chun-Chi; Chen, Dong-Yi; Yang, Chia-Hung; Tsai, Ming-Lung; Ho, Ming-Yun; Chang, Shang-Hung; Wang, Chao-Yung; Lee, Cheng-Hung; Hsieh, I-Chang

    2017-05-24

    Clinical trials have investigated efficacy of drug-eluting balloon (DEB) angioplasty for bare-metal stent (BMS) in-stent restenosis (ISR). Few studies have investigated predictors of long-term outcomes following BMS-ISR treatment with DEB. From June 2011 to April 2015, 105 patients with 125 BMS-ISR lesions were enrolled from the Cardiovascular Atherosclerosis and Percutaneous TrAnsluminal INterventions (CAPTAIN) registry. All these lesions were treated with DEB angioplasty as final therapy. The major adverse cardiac events (MACEs) were recurrent clinically driven target lesion revascularisation (TLR), myocardial infarction, and cardiac death after DEB angioplasty. After DEB angioplasty, the angiographic stenosis decreased from 84.8%±12.4% to 22.6%±10.4%. Over a mean follow-up duration of 21.7±13.4months, the rates of TLR at 1-12 months and 12-48 months were 4.8% and 4.2%, respectively. The rates of MACEs at 1-12 months and 12-48 months were 6.7% and 6.1%, respectively. Chronic haemodialysis, calcified lesion, chronic total occlusion lesion before stenting, stent with metal-to-artery ratio >16.5%, and residual stenosis >25% after DEB angioplasty were potential risk factors for MACEs in univariate analysis. After adjustment in multivariate analysis, independent predictors of long-term MACEs were identified as chronic haemodialysis, chronic total occlusion lesion before stenting, and residual stenosis >25% after DEB angioplasty. The long-term results of DEB angioplasty for BMS-ISR are acceptable in this real-world registry. Patient (chronic haemodialysis), lesion (chronic total occlusion) and angioplasty (residual stenosis percentage) related factors predicted long-term outcomes following BMS-ISR treatment with DEB angioplasty. Copyright © 2017 Australian and New Zealand Society of Cardiac and Thoracic Surgeons (ANZSCTS) and the Cardiac Society of Australia and New Zealand (CSANZ). Published by Elsevier B.V. All rights reserved.

  20. Relationship of Occlusal Schemes with the Occurrence of Temporomandibular Disorders

    Directory of Open Access Journals (Sweden)

    Dina H. Sugiaman

    2013-07-01

    Full Text Available Masticatory system is a complex functional unit of the body responsible for mastication, speech, and deglutition process. Temporomandibular disorders (TMD is used to describe all functional disturbances of the masticatory system. The etiology of TMD is multifactorial, such as occlusal disharmony and emotional stress. The relationship between occlusion and TMD has been highly debated in dentistry, one of the occlusal factors is the occlusal scheme. Occlusal schemes are defined as bilateral canine guidance, unilateral canine guidance, group function and balanced occlusion. However, studies about the relationship of occlusal schemes and the occurrence of the TMD are still limited and remained controversial. Objective: To investigate the relationship of occlusal schemes witht he occurrence of TMD. Methods: A cross-sectional study was conducted at the Faculty of Dentistry, Uniiversitas Indonesia. A total of 127 students were included in this study. Subjects were examined based on Clinical Helkimo Index and divided into TMD and non-TMD groups. Subjects were categorized as non-TMD groups if the value of the clinical Helkimo index was 0 and as TMD group when the value ranged between 1-25. Results: Balanced occlusion schemes has a greater risk of TMD occurrence with odds ratio value 5.6 and 95% confidence interval 1.188 to 26.331 (p=0.021. Conclusion: Balanced occlusion has a significant relationship with the occurrence of TMD.

  1. The ATIC Long Duration Balloon Project

    Science.gov (United States)

    Guzik, T.

    Long Duration Balloon (LDB) scientific experiments, launched to circumnavigate the south pole over Antarctica, have particular advantages compared to Shuttle or other Low Earth Orbit (LEO) missions in terms of cost, weight, scientific "duty factor" and work force development. The Advanced Thin Ionization Calorimeter (ATIC) cosmic ray astrophysics experiment is a good example of a university-based project that takes full advantage of current LDB capability and could effectively use future expansion in launch weight and flight duration. The ATIC experiment is currently being shipped to Antarctica in preparation for its first LDB science flight that will investigate the charge composition and energy spectra of primary cosmic rays over the energy range from about 101 0 to 10 1 4 eV. The instrument is built around a fully active, Bismuth Germanate (BGO) ionization calorimeter to measure the energy deposited by the cascades formed by particles interacting in a thick carbon target. A highly segmented silicon matrix, located above the target, provides good incident charge resolution plus rejection of the "backscattered" particles from the interaction. Trajectory reconstruction is based on the cascade profile in the BGO calorimeter, plus information from the three scintillator hodoscope layers in the target section above it. The hodoscope planes also provide the primary event trigger to initiate the detector readout, another measure of the incident particle charge and an indicator of the interaction point in the carbon material. The scientific payload weighs ~1,540 kg and consumes ~300 Watts of power supplied by a ~580 Watt solar array system. A full evaluation of the experiment was performed during a test flight occurring between 28 December 2000 and 13 January 2001 where ATIC was carried3 to an altitude of ~37 km above Antarctica by a ~850,000 m helium filled balloon for one circumnavigation of the continent. All systems behaved well, the detectors performed as expected

  2. Application of photogrammetry for analysis of occlusal contacts.

    Science.gov (United States)

    Shigeta, Yuko; Hirabayashi, Rio; Ikawa, Tomoko; Kihara, Takuya; Ando, Eriko; Hirai, Shinya; Fukushima, Shunji; Ogawa, Takumi

    2013-04-01

    The conventional 2D-analysis methods for occlusal contacts provided limited information on tooth morphology. This present study aims to detect 3D positional information of occlusal contacts from 2D-photos via photogrammetry. We propose an image processing solution for analysis of occlusal contacts and facets via the black silicone method and a photogrammetric technique. The occlusal facets were reconstructed from a 2D-photograph data-set of inter-occlusal records into a 3D image via photogrammetry. The configuration of the occlusal surface was reproduced with polygons. In addition, the textures of the occlusal contacts were mapped to each polygon. DIFFERENCE FROM CONVENTIONAL METHODS: Constructing occlusal facets with 3D polygons from 2D-photos with photogrammetry was a defining characteristic of this image processing technique. It allowed us to better observe findings of the black silicone method. Compared with conventional 3D analysis using a 3D scanner, our 3D models did not reproduce the detail of the anatomical configuration. However, by merging the findings of the inter-occlusal record, the deformation of mandible and the displacement of periodontal ligaments under occlusal force were reflected in our model. EFFECT OR PERFORMANCE: Through the use of polygons in the conversion of 2D images to 3D images, we were able to define the relation between the location and direction of the occlusal contacts and facets, which was difficult to detect via conventional methods. Through our method of making a 3D polygon model, the findings of inter-occlusal records which reflected the jaw/teeth behavior under occlusal force could be observed 3-dimensionally. Copyright © 2012 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.

  3. Free boundary ballooning mode representation and its application

    Science.gov (United States)

    Zheng, Linjin

    2012-10-01

    Free boundary ballooning mode representation is developed in this paper. This representation allows the two dimensional problem of peeling ballooning modes to be treated in one dimensional formalism. In contrast to the conventional ballooning representation, which requires the translational invariance of the Fourier components of the perturbations, the new invariance reflects that the independent solutions of the high n mode equations are translationally invariant from one radial interval surrounding a single singular surface to the other intervals. The conventional ballooning mode invariance breaks down at the vicinity of plasma edge, since the Fourier components with rational surfaces in vacuum region are completely different from those with rational surfaces in plasma region. But, the new type of invariance remains valid. This overcomes the limitation of the conventional ballooning mode representation for studying free boundary modes. Since the current formalism is adaptable to the cases with various sharp boundary changes, it therefore can be also generalized to study the piece-wise equilibrium cases, for example, the H-mode pedestal and X-point physics.

  4. Aerial Deployment and Inflation System for Mars Helium Balloons

    Science.gov (United States)

    Lachenmeler, Tim; Fairbrother, Debora; Shreves, Chris; Hall, Jeffery, L.; Kerzhanovich, Viktor V.; Pauken, Michael T.; Walsh, Gerald J.; White, Christopher V.

    2009-01-01

    A method is examined for safely deploying and inflating helium balloons for missions at Mars. The key for making it possible to deploy balloons that are light enough to be buoyant in the thin, Martian atmosphere is to mitigate the transient forces on the balloon that might tear it. A fully inflated Mars balloon has a diameter of 10 m, so it must be folded up for the trip to Mars, unfolded upon arrival, and then inflated with helium gas in the atmosphere. Safe entry into the Martian atmosphere requires the use of an aeroshell vehicle, which protects against severe heating and pressure loads associated with the hypersonic entry flight. Drag decelerates the aeroshell to supersonic speeds, then two parachutes deploy to slow the vehicle down to the needed safe speed of 25 to 35 m/s for balloon deployment. The parachute system descent dynamic pressure must be approximately 5 Pa or lower at an altitude of 4 km or more above the surface.

  5. Maternal outcomes after uterine balloon tamponade for postpartum hemorrhage.

    Science.gov (United States)

    Martin, Emmanuelle; Legendre, Guillaume; Bouet, Pierre-Emmanuel; Cheve, Marie-Therese; Multon, Olivier; Sentilhes, Loïc

    2015-04-01

    To evaluate maternal outcomes following uterine balloon tamponade in the management of postpartum hemorrhage. Retrospective case-series. Two French hospitals, a level 3 university referral center and a level 2 private hospital. All women who underwent balloon tamponade treatment for primary postpartum hemorrhage. Uterine tamponade was used after standard treatment of postpartum hemorrhage had failed. The study population was divided into two groups, successful cases where the bleeding stopped after the balloon tamponade, and failures requiring subsequent surgery or embolization. Success rates. Uterine tamponade was used in 49 women: 30 (61%) after vaginal delivery and 19 (39%) after cesarean section. Uterine atony was the main cause of hemorrhage (86%). The overall success rate was 65%. Of 17 failures, surgery was required in 16 cases, including hysterectomy in 11, and uterine artery embolization in one case. Demographic and obstetric characteristics did not differ significantly between the success and failure groups. No complications were directly attributed to the balloon tamponade in the postpartum period. Two women had a subsequent full-term pregnancy without recurrence of postpartum hemorrhage. Balloon tamponade is an effective, safe and readily available method for treating primary postpartum hemorrhage and could reduce the need for invasive procedures. © 2015 Nordic Federation of Societies of Obstetrics and Gynecology.

  6. Endoscopic Balloon Dilation of Esophageal Strictures in 9 Horses.

    Science.gov (United States)

    Prutton, J S W; Marks, S L; Aleman, M

    2015-01-01

    Medical treatment of esophageal strictures in horses is limited and the use of balloon dilatation is described in few cases. Long-term follow up after balloon dilatation and the use of intralesional corticosteroids has not been evaluated. To describe the use of endoscopic guided, esophageal balloon dilatation in horses for cervical and thoracic esophageal strictures and administration of intralesional corticosteroids at the time of dilatation. Nine horses from the hospital population with benign esophageal strictures. Retrospective study: Medical records were reviewed from horses presented to the William R. Pritchard, Veterinary Medical Teaching Hospital at UC Davis from 2002 to 2013. Records were searched using the key words: equine, horse, balloon dilatation, bougienage, and esophageal stricture. Nine horses with esophageal strictures were treated with esophageal balloon dilatation. Five horses survived (survival at writing ranged from 2 to 11 years after discharge) and all nonsurvivors were dilatation. Intralesional corticosteroids might reduce the incidence of recurrent strictures. Copyright © 2015 The Authors. Journal of Veterinary Internal Medicine published by Wiley Periodicals, Inc. on behalf of the American College of Veterinary Internal Medicine.

  7. Time-dependent strains and stresses in a pumpkin balloon

    Science.gov (United States)

    Gerngross, T.; Xu, Y.; Pellegrino, S.

    This paper presents a study of pumpkin-shaped superpressure balloons consisting of gores made from a thin polymeric film attached to high stiffness meridional tendons This type of design is being used for the NASA ULDB balloons The gore film shows considerable time-dependent stress relaxation whereas the behaviour of the tendons is essentially time-independent Upon inflation and pressurization the instantaneous i e linear-elastic strain and stress distributions in the film show significantly higher values in the meridional direction However over time and due to the biaxial visco-elastic stress relaxation of the the gore material the em hoop strains increase and the em meridional stresses decrease whereas the em remaining strain and stress components remain substantially unchanged These results are important for a correct assessment of the structural integrity of a pumpkin balloon in a long-duration mission both in terms of the material performance and the overall stability of the shape of the balloon An experimental investigation of the time dependence of the biaxial strain distribution in the film of a 4 m diameter 48 gore pumpkin balloon is presented The inflated shape of selected gores has been measured using photogrammetry and the time variation in strain components at some particular points of these gores has been measured under constant pressure and temperature The results show good correlation with a numerical study using the ABAQUS finite-element package that includes a widely used model of

  8. A minimally-invasive closed chest myocardial occlusion-reperfusion model in rhesus monkeys (Macaca mulatta): monitoring by contrast-enhanced ultrasound imaging.

    Science.gov (United States)

    Contamin, Hugues; Rioufol, Gilles; Bettinger, Thierry; Helbert, Alexandre; Portier, Karine G; Lepage, Olivier M; Thomas, Regi; Broillet, Anne; Tranquart, François; Schneider, Michel

    2012-03-01

    Myocardial infarction is frequently developed in canine and porcine models but exceptionally in non-human primates. The aim of this study was to develop a minimally invasive myocardial ischemic/reperfusion model in the monkey intended to be combined with imaging techniques, in particular myocardial contrast echocardiography (MCE). A balloon-tipped catheter was advanced via the femoral artery into the left anterior descending artery (LAD) under fluoroscopic guidance in ten anaesthetized male rhesus monkeys (Macaca mulatta). The balloon was inflated to completely occlude the vessel. Coronary angiography (CA) was performed to control the reality of the LAD occlusion/reperfusion. The ischemia period was followed by 3-6 h of reperfusion. Myocardial perfusion was evaluated during ischemia and at reperfusion by MCE using a novel ultrasound contrast agent (BR38). Occlusion was successfully induced during 18-50 min in nine out of the ten evaluated monkeys. ST segment elevation indicated myocardial ischemia. MCE showed complete transmural arrest of myocardial blood flow during the ischemia period and no persistent microvascular perfusion defects during reperfusion. A minimally invasive closed-chest model was successfully developed for creating myocardial ischemia in the rhesus monkey (Macaca mulatta). This technique could have an important role in mimicking acute coronary syndrome under physiologically and ethically-acceptable conditions. MCE provides non-invasively information on myocardial perfusion status, information not available from CA.

  9. Methodological challenges in the study of dental occlusion.

    Science.gov (United States)

    Jokstad, A

    2012-07-01

    This narrative review describes the methodological challenges in the study of dental occlusion. The reigning confusion about the scope of this topic is discussed, and a conceptual framework for understanding dental occlusion research is suggested. The characteristics of clinical studies used in the study of dental occlusion are presented within this proposed framework consisting of a triad comprising the relative positions of the teeth-mandible-maxilla, the oral functions and oral appearance. Challenges in the preparation for a clinical study of dental occlusion are reviewed, which include a discourse on the objectives of a clinical study and appropriateness of different study designs. Guidelines are provided for the conduct of studies with a central focus on dental occlusion and diagnostic tests, prognosis, therapy and aetiology, respectively. Summarising chapters present methodological challenges in designing a clinical study of dental occlusion and threats to the proper conduct of a clinical study. © 2012 Blackwell Publishing Ltd.

  10. Analyzing dental occlusion for implants: Tekscan's TScan III.

    Science.gov (United States)

    Garg, Arun K

    2007-09-01

    Though no single, specific occlusal pattern has been developed that is ideal for oral implantology, research suggests some general criteria for deciding on a particular occlusal pattern that will help reduce cuspal interferences and lessen horizontal or lateral forces on the fixtures. Anticipated occlusal and chewing forces need to be taken under consideration for any implant-supported prosthesis. In addition, opposing dentition, as well as potential parafunctional mandibular movements, should be noted. Tekscan's T-Scan Occlusal Analysis System can help clinicians meet the needs of their patients for reliable measurements of occlusal biting forces. The T-Scan III System is Tekscan's most recent attempt to help dental clinicians obtain consistent and useful occlusal data for the placement, analysis, and repair of dental implants.

  11. Dental occlusion modifies gaze and posture stabilization in human subjects.

    Science.gov (United States)

    Gangloff, P; Louis, J P; Perrin, P P

    2000-11-03

    Repercussion of dental occlusion was tested upon postural and gaze stabilization, the latter with a visuo-motor task evaluated by shooting performances. Eighteen permit holders shooters and 18 controls were enrolled in this study. Postural control was evaluated in both groups according to four mandibular positions imposed by interocclusal splints: (i) intercuspal occlusion (IO), (ii) centric relation (CR), (iii) physiological side lateral occlusion and (iv) controlateral occlusion, in order to appreciate the impact of the splints upon orthostatism. Postural control and gaze stabilization quality decreased, from the best to the worst, with splints in CR, IO and lateral occlusion. In shooters, the improvement in postural control was parallel to superior shooting performance. A repercussion of dental occlusion upon proprioception and visual stabilization is suggested by these data.

  12. Popping balloons: formation of a crack network in rubber membranes

    Science.gov (United States)

    Moulinet, Sebastien; Adda-Bedia, Mokhtar; Equipe Morphogenèse et phénomènes multi-échelle Team

    2015-03-01

    Everyone can make the observation: a rubber balloon inflated until it spontaneously pop breaks into a large number of shreds. In contrast, a balloon pierced with a needle at an early stage of its inflation breaks into two large pieces. Using model latex balloons, we have experimentally investigated the transition between these two breaking regimes. We have showed that, above a threshold stress in the latex membrane, a single crack become unstable and separates into two new cracks. Then, a cascade of tip-splitting generates a network of cracks that eventually form a large number of fragments. We have observed that the instability of the crack occurs when it reaches a limit velocity that could the speed of sound. By studying the energy balance during the explosion, we can determine the intrinsic fracture energy of rubber, a measurement difficult to achieve with usual tensile testing.

  13. Intragastric Balloon for Management of Severe Obesity: a Systematic Review.

    Science.gov (United States)

    Yorke, Ekua; Switzer, Noah Jacob; Reso, Artan; Shi, Xinhe; de Gara, Christopher; Birch, Daniel; Gill, Richdeep; Karmali, Shahzeer

    2016-09-01

    Older models of intragastric balloons (IGBs) had unacceptably high complication rates and inconsequential weight loss. With FDA approval of newer models, we aimed to systematically examine the literature regarding the efficacy of IGB therapy for obesity. A comprehensive electronic database search was completed. Title searching was restricted to the following keywords: bariatric, gastric, gastric bypass, gastric band, sleeve gastrectomy, and intragastric balloon. Twenty-six primary studies (n = 6101) were included. At balloon removal, mean change in weight and BMI were 15.7 ± 5.3 kg and 5.9 ± 1.0 kg/m(2). The most common complications were nausea/vomiting (23.3 %) and abdominal pain (19.9 %). Serious complications were rare: mortality (0.05 %) and gastric perforation (0.1 %). IGBs are associated with marked short-term weight loss with limited serious complications.

  14. Prognostic factors for the success of thermal balloon ablation in the treatment of menorrhagia

    NARCIS (Netherlands)

    Bongers, M. Y.; Mol, B. W. J.; Brölmann, H. A. M.

    2002-01-01

    OBJECTIVE: To identify predictive factors that will ensure successful menorrhagia treatment using hot fluid balloon endometrial ablation. METHODS: This is a prospective study on patients referred for menorrhagia and treated with hot fluid thermal balloon ablation. Potential prognostic factors for

  15. The correction of occlusal vertical dimension on tooth wear

    Directory of Open Access Journals (Sweden)

    Rostiny Rostiny

    2007-12-01

    Full Text Available The loss of occlusal vertical dimension which is caused by tooth wear is necessarily treated to regain vertical dimension. Correctional therapy should be done as early possible. In this case, simple and relatively low cost therapy was performed. In unserve loss of occlusal vertical dimension, partial removable denture could be used and the improvement of lengthening anterior teeth using composite resin to improve to regain vertical dimensional occlusion.

  16. Outcomes after treatment of acute aortic occlusion.

    Science.gov (United States)

    de Varona Frolov, Serguei R; Acosta Silva, Marcela P; Volo Pérez, Guido; Fiuza Pérez, Maria D

    2015-11-01

    Acute aortic occlusion (AAO) is a rare disease with high morbidity and mortality. The aim of this study was to describe the results of surgical treatment of acute aortic occlusion and risk factors for mortality. Retrospective review of the clinical history of 29 patients diagnosed and operated on for AAO during 28 years. The following variables were analysed: age, sex, tabaco use, diabetes, chronic renal insufficiency, chronic heart failure, atrial fibrillation, arterial hypertension, symptoms, diagnosis and treatment, 30-day mortality and long-term survival. A univariant analysis was performed of variables related to mortality. Twenty-nine patients were included (18 male) with a mean age of 66,2 years. The aetiology was: embolism (EM) in 11 cases and Thrombosis (TR) in 18 cases. The surgical procedures performed included bilateral transfemoral thrombectomy (14 cases), aorto-bifemoral by-pass (8 cases), axilo uni/bifemoral by-pass (5 cases) and aortoiliac and renal tromboendarterectomy (2 cases). Morbidity included: renal failure (14 cases), mesenteric ischemia (4 cases), cardiac complications (7 cases), respiratory complications (5 cases) and loss of extremity (2 cases). The in-hospital mortality was 21% (EM 0%, TR 21%). The estimated survival at 1.3 and 5 years was 60, 50 and 44% respectively. Age (p=0.032), arterial hypertension (p=0.039) and aetiology of the AAO (p=0.039) were related to mortality. Acute aortic occlusion is a medical emergency with high mortality rates. Acute renal failure is the most common postoperative complication. Copyright © 2012 AEC. Publicado por Elsevier España, S.L.U. All rights reserved.

  17. Balloon-Borne Infrasound Detection of Energetic Bolide Events

    Science.gov (United States)

    Young, Eliot F.; Ballard, Courtney; Klein, Viliam; Bowman, Daniel; Boslough, Mark

    2016-10-01

    Infrasound is usually defined as sound waves below 20 Hz, the nominal limit of human hearing. Infrasound waves propagate over vast distances through the Earth's atmosphere: the CTBTO (Comprehensive Nuclear-Test-Ban Treaty Organization) has 48 installed infrasound-sensing stations around the world to detect nuclear detonations and other disturbances. In February 2013, several CTBTO infrasound stations detected infrasound signals from a large bolide that exploded over Chelyabinsk, Russia. Some stations recorded signals that had circumnavigated the Earth, over a day after the original event. The goal of this project is to improve upon the sensitivity of the CTBTO network by putting microphones on small, long-duration super-pressure balloons, with the overarching goal of studying the small end of the NEO population by using the Earth's atmosphere as a witness plate.A balloon-borne infrasound sensor is expected to have two advantages over ground-based stations: a lack of wind noise and a concentration of infrasound energy in the "stratospheric duct" between roughly 5 - 50 km altitude. To test these advantages, we have built a small balloon payload with five calibrated microphones. We plan to fly this payload on a NASA high-altitude balloon from Ft Sumner, NM in August 2016. We have arranged for three large explosions to take place in Socorro, NM while the balloon is aloft to assess the sensitivity of balloon-borne vs. ground-based infrasound sensors. We will report on the results from this test flight and the prospects for detecting/characterizing small bolides in the stratosphere.

  18. Mixing processes in the stratosphere inferred from Project Loon balloons.

    Science.gov (United States)

    Conway, J. P.; Bodeker, G. E.; Cameron, C.; Lewis, J.; Cooper, K.

    2016-12-01

    Dynamical processes that occur in the stratosphere between 15 and 50 km above Earth's surface, can affect our weather and climate. The vortex of westerly winds that encircles the Antarctic stratosphere in the winter and spring of each year is a defining dynamical feature of the Southern Hemisphere stratosphere. The permeability of the vortex edge determines the north to south gradient in a number of trace gases. Many of these trace gases, such as ozone, are radiatively active gases whose morphology defines temperature gradients in the stratosphere. The processes controlling the permeability of the Antarctic vortex, and how they are likely to respond to a changing climate, have not been well studied and, as a result, are not well simulated in atmosphere-ocean global climate models. Since 2014, hundreds of long-duration stratospheric balloons have been flown by Project Loon, a project of X [formerly Google(x)] aimed at providing Internet access to remote locations. The position and pressure data from these balloons provide an unprecedented opportunity to detail the transport and small-scale turbulent diffusion processes active in the southern middle and high latitude stratosphere. Transport and mixing processes are analysed through a variety of methods. Firstly, the divergence of actual balloon trajectories from paths calculated with a trajectory model reveal either where sub-grid-scale winds matter, where analysed large-scale winds are erroneous, or where regions of chaotic mixing occur. Regions of chaotic mixing are identified using reverse domain filling and Lyapunov exponents. A number of coordinated sequential launches of Loon balloons make it possible to calculate Lyapunov exponents directly from balloon location data, allowing the validation of Lyapunov exponents calculated from reanalysis. Finally, the geometric relationships between balloons in close proximity (within tens of kilometres) also allows the identification of coherent structures that are

  19. Central Retinal Vein Occlusion Revealing Coelic Disease

    Directory of Open Access Journals (Sweden)

    Hana ZOUBEIDI

    2016-11-01

    Full Text Available Introduction: Thrombosis has been widely reported in coeliac disease (CD but central retinal vein occlusion (CRVO is rarely described. Case presentation: A 27-year-old woman presented with acute visual loss and was diagnosed with CRVO. Her protein S and protein C levels were low and CD was diagnosed on the basis of endoscopic, immunological and histological results. A gluten-free diet resulted in favourable evolution. Conclusion: CD should be considered in young patients with thrombosis, especially if in an unusual location. Treatment is based on a gluten-free diet.

  20. Branch Retinal Artery Occlusion following Dental Extraction

    OpenAIRE

    Tevfik Oğurel; Zafer Onaran; Reyhan Oğurel; Nurgül Örnek; Nesrin Büyüktortop Gökçınar; Kemal Örnek

    2014-01-01

    Aim. To describe a case of branch retinal artery occlusion following dental extraction and to point out the ophthalmic complications of dental procedures to ophthalmologists and dentists. Case. A 51-year-old woman was referred to our clinic with painless sudden visual loss in her left eye after tooth extraction two days ago. In her left eye the best corrected visual acuity was 6/30 and fundus examination revealed peripapillary flame-shaped hemorrhages and pale retina in the upper temporal arc...

  1. An occlusion insensitive adaptive focus measurement method.

    Science.gov (United States)

    Aydin, Tarkan; Akgul, Yusuf S

    2010-06-21

    This paper proposes a new focus measurement method for Depth From Focus to recover depth of scenes. The method employs an all-focused image of the scene to address the focus measure ambiguity problem of the existing focus measures in the presence of occlusions. Depth discontinuities are handled effectively by using adaptively shaped and weighted support windows. The size of the support window can be increased conveniently for more robust depth estimation without introducing any window size related Depth From Focus problems. The experiments on the real and synthetically refocused images show that the introduced focus measurement method works effectively and efficiently in real world applications.

  2. Empirical correlation methods for temporary anions.

    Science.gov (United States)

    Sommerfeld, Thomas; Weber, Rebecca J

    2011-06-23

    A temporary anion is a short-lived radical anion that decays through electron autodetachment into a neutral molecule and a free electron. The energies of these metastable species are often predicted using empirical correlation methods because ab initio predictions are computationally very expensive. Empirical correlation methods can be justified in the framework of Weisskopf-Fano-Feshbach theory but tend to work well only within closely related families of molecules or within a restricted energy range. The reason for this behavior can be understood using an alternative theoretical justification in the framework of the Hazi-Taylor stabilization method, which suggests that the empirical parameters do not so much correct for the coupling of the computed state to the continuum but for electron correlation effects and that therefore empirical correlation methods can be improved by using more accurate electronic structure methods to compute the energy of the confined electron. This idea is tested by choosing a heterogeneous reference set of temporary states and comparing empirical correlation schemes based on Hartree-Fock orbital energies, Kohn-Sham orbital energies, and attachment energies computed with the equation-of-motion coupled-cluster method. The results show that using more reliable energies for the confined electron indeed enhances the predictive power of empirical correlation schemes and that useful correlations can be established beyond closely related families of molecules. Certain types of σ* states are still problematic, and the reasons for this behavior are analyzed. On the other hand, preliminary results suggest that the new scheme can even be useful for predicting energies of bound anions at a fraction of the computational cost of reliable ab initio calculations. It is then used to make predictions for bound and temporary states of the furantrione and croconic acid radical anions.

  3. Properties of nylon 12 balloons after thermal and liquid carbon dioxide treatments.

    Science.gov (United States)

    Ro, Andrew J; Davé, Vipul

    2013-03-01

    Critical design attributes of angioplasty balloons include the following: tear resistance, high burst pressures, controlled compliance, and high fatigue. Balloons must have tear resistance and high burst pressures because a calcified stenosis can be hard and nominal pressures of up to 16 atm can be used to expand the balloon. The inflated balloon diameter must be a function of the inflation pressure, thus compliance is predictable and controlled. Reliable compliance is necessary to prevent damage to vessel walls, which may be caused by over-inflation. Balloons are often inflated multiple times in a clinical setting and they must be highly resistant to fatigue. These design attributes are dependent on the mechanical properties and polymer morphology of the balloon. The effects of residual stresses on shrinkage, crystallite orientation, balloon compliance, and mechanical properties were studied for angioplasty nylon 12 balloons. Residual stresses of these balloons were relieved by oven heat treatment and liquid CO2 exposure. Residual stresses were measured by quantifying shrinkage at 80 °C of excised balloon samples using a dynamic mechanical analyzer. Shrinkage was lower after oven heat treatment and liquid CO2 exposure compared to the as-received balloons, in the axial and radial directions. As-received, oven heat treated, and liquid CO2-exposed balloon samples exhibited similar thermal properties (T(g), T(m), X(t)). Crystallite orientation was not observed in the balloon cylindrical body using X-ray scattering and polarized light microscopy, which may be due to balloon fabrication conditions. Significant differences were not observed between the stress-strain curves, balloon compliance, and average burst pressures of the as-received, oven heat treated, and liquid CO2-exposed balloons. Copyright © 2012 Elsevier B.V. All rights reserved.

  4. Nonlinear simulation of resistive ballooning modes in Large Helical Device

    Energy Technology Data Exchange (ETDEWEB)

    Miura, Hideaki; Hayashi, Takaya; Sato, Tetsuya

    2001-06-01

    Nonlinear simulations of a magneto-hydrodynamic (MHD) plasma in full three-dimensional geometry of the Large Helical Device (LHD) are conducted to study nonlinear evolution of pressure-driven instabilities. A series of simulations for a resistive plasma shows growth of resistive ballooning instability. The growth rate of the most unstable resistive ballooning mode is shown to be proportional to the one-third power of the resistivity. Nonlinear saturation of the instability and its slow decay are observed. After the nonlinear saturation, the pressure takes a profile similar to so-called pedestal. A possible scenario of nonlinear relaxation of a plasma toward a new equilibrated state is discussed. (author)

  5. EBEX: A Balloon-Borne CMB Polarization Experiment

    Science.gov (United States)

    Chapman, Daniel; Aboobaker, A. M.; Ade, P.; Aubin, F.; Baccigalupi, C.; Bandura, K.; Bao, C.; Borrill, J.; Didier, J.; Dobbs, M.; Gold, B.; Grain, J.; Grainger, W.; Hanany, S.; Helson, K.; Hillbrand, S. N.; Hilton, G.; Hubmayr, H.; Irwin, K.; Johnson, B.; Jaffe, A.; Jones, T. J.; Kisner, T.; Klein, J.; Korotkov, A.; Leach, S.; Lee, A. T.; Levinson, L.; Limon, M.; MacDermid, K.; Miller, A. D.; Milligan, M.; Pascale, E.; Raach, K.; Reichborn-Kjennerud, B.; Sagiv, I.; Smecher, G.; Stompor, R.; Tristram, M.; Tucker, G. S.; Westbrook, B.; Zilic, K.

    2014-01-01

    The E and B Experiment (EBEX) is a balloon-borne telescope designed to probe polarization signals in the CMB resulting from primordial gravitational waves, gravitational lensing, and Galactic dust emission. EBEX is the first balloon-borne astrophysical polarimeter to use a continuously rotating achromatic half-wave plate on a superconducting magnetic bearing and over 1000 transition edge sensor bolometers read out with SQUID amplifiers. The instrument completed an 11 day flight over Antarctica in January 2013 and data analysis is underway. We will provide an overview of the experiment and the Antarctic flight, and give an update on the analysis.

  6. AIAA Educator Academy: The Space Weather Balloon Module

    Science.gov (United States)

    Longmier, B.; Henriquez, E.; Bering, E. A.; Slagle, E.

    2013-12-01

    Educator Academy is a K-12 STEM curriculum developed by the STEM K-12 Outreach Committee of the American Institute of Aeronautics and Astronautics (AIAA). Consisting of three independent curriculum modules, K-12 students participate in inquiry-based science and engineering challenges to improve critical thinking skills and enhance problem solving skills. The Space Weather Balloon Curriculum Module is designed for students in grades 9-12. Throughout this module, students learn and refine physics concepts as well as experimental research skills. Students participate in project-based learning that is experimental in nature. Students are engaged with the world around them as they collaborate to launch a high altitude balloon equipped with HD cameras.The program leaders launch high altitude weather balloons in collaboration with schools and students to teach physics concepts, experimental research skills, and to make space exploration accessible to students. A weather balloon lifts a specially designed payload package that is composed of HD cameras, GPS tracking devices, and other science equipment. The payload is constructed and attached to the balloon by the students with low-cost materials. The balloon and payload are launched with FAA clearance from a site chosen based on wind patterns and predicted landing locations. The balloon ascends over 2 hours to a maximum altitude of 100,000 feet where it bursts and allows the payload to slowly descend using a built-in parachute. The payload is located using the GPS device. In April 2012, the Space Weather Balloon team conducted a prototype field campaign near Fairbanks Alaska, sending several student-built experiments to an altitude of 30km, underneath several strong auroral displays. To better assist teachers in implementing one or more of these Curriculum Modules, teacher workshops are held to give teachers a hands-on look at how this curriculum is used in the classroom. And, to provide further support, teachers are each

  7. Predicting paravalvular leak after balloon-expandable TAVR.

    Science.gov (United States)

    Krishnaswamy, Amar; Tuzcu, E Murat

    2015-07-01

    Objective measurement of a Valve Calcification Index (calcium volume/BSA) may predict PVL after TAVR using a cutoff value > 418 mm(3) /mm(2) Oversizing the balloon-expandable SAPIEN valve with a goal ratio of valve diameter: average annulus diameter > 1.055 may reduce PVL after TAVR Single parameters are unlikely to provide adequate sensitivity to reduce PVL; a thorough analysis of root sizing, calcification, and morphology is important to balloon-expandable TAVR safety and efficacy. © 2015 Wiley Periodicals, Inc.

  8. Hydrocolloid occlusion for the treatment of neurovascular corns

    DEFF Research Database (Denmark)

    Petersen, Lars Jelstrup; Beck, Jan Walther; Reumert, L N

    1991-01-01

    The goal of this study was to determine the effect of hydrocolloid occlusion on neurovascular corns. The design was an observer-blinded, randomized, controlled study. Thirty consecutive patients participated in the trial. The patients received curettage alone or curettage with hydrocolloid...... occlusion. Six treatments were given over 12 weeks. A follow-up examination was performed 3 months after termination of the trial. Outcome measures were the size of the corns, a discomfort score, and an overall judgment of the trial. The results demonstrated no benefit of occlusion for symptoms or signs...... of neurovascular corns. The patients treated with occlusion were, however, generally more satisfied than the conventional group....

  9. Bilateral retinal vein occlusion and rubeosis irides: lessons to learn.

    Directory of Open Access Journals (Sweden)

    Umi Kalthum Md Noh

    2013-09-01

    Full Text Available Uncontrolled hypertension is well- known to give rise to systemic complications involving multiple central organs. Artherosclerosis leads to damage of the retinal vessels wall, contributing to venous stasis, thrombosis and finally, occlusion. Retinal vein occlusions compromise vision through development of ischaemic maculopathy, macular oedema, and rubeotic glaucoma. Laser photocoagulation remains the definitive treatment for ischaemic vein occlusion with secondary neovascularization. Timely treatment with anti- vascular endothelial growth factor prevents development of rubeotic glaucoma. We hereby report an unusual case of bilateral retinal vein occlusion complicated by rubeosis irides, which was successfully managed to improve vision and prevent rubeotic glaucoma.

  10. A rare case of branch retinal vein occlusion following Sirsasana

    National Research Council Canada - National Science Library

    Balamurugan, Anugraha; Srikanth, Krishnagopal

    2016-01-01

    .... It is also known to cause causes raised intraocular pressure, decompression retinopathy, glaucomatous visual field defects, central retinal vein occlusion, progression of glaucoma, optic neuropathy...

  11. Dental occlusion and periodontal disease: what is the real relationship?

    Science.gov (United States)

    Bhola, Monish; Cabanilla, Leyvee; Kolhatkar, Shilpa

    2008-12-01

    ABSTRACT The role of occlusion in periodontal disease has always been a challenging topic. A good understanding of the current status of the relationship of occlusion and periodontitis is of paramount importance in order for dental clinicians to provide adequate and comprehensive periodontal treatment in patients presenting with traumatic occlusion. This article reviews the literature regarding the relationship between occlusion and periodontitis and presents recommendations for clinical practice based on available evidence. Clinical cases illustrating the complexity of this relationship and their management are presented.

  12. Temporary new opening hours for Gate C

    CERN Multimedia

    GS Department

    2010-01-01

    Please note the new temporary opening hours for the gate C as from 22 September 2010 until 29 October 2010 (working days): Morning: between 7:00 a.m. and 9:00 a.m. Lunch: between 12:00 and 2:00 p.m. Evening: between 5:00 pm and 7:00 p.m. Traffic flow will be permitted in both directions during this period. Please minimize your speed accordingly and respect all road signs. GS-SEM Group General Infrastructure Services Department

  13. Criteria for diagnosis of temporary gluten intolerance.

    Science.gov (United States)

    McNeish, A S; Rolles, C J; Arthur, L J

    1976-04-01

    Strict criteria for the diagnosis of temporary gluten intolerance are formulated in the light of the case of an 8-week-old infant with severe diarrhoea and failure to thrive, who recovered on an elimination diet that was gluten-free. 8 weeks later an oral challenge with 2.5 g twice daily of powdered gluten for one day produced diarrhoea, weight loss, and impaired xylose absorption. Gluten was successfully reintroduced into the diet 9 months later without incident. Jejunal histology remains normal after 26 months of a daily diet that contains 5 to 10 g gluten.

  14. Temporary effects of alcohol on color vision

    Science.gov (United States)

    Geniusz, Maciej K.; Geniusz, Malwina; Szmigiel, Marta; Przeździecka-Dołyk, Joanna

    2017-09-01

    The color vision has been described as one to be very sensitive to the intake of several chemicals. The present research reviews the published literature that is concerned with color vision impairment due to alcohol. Most of this research considers people under long-term effects of alcohol. However, there is little information about temporary effects of alcohol on color vision. A group of ten volunteers aged 18-40 was studied. During the study levels of alcohol in the body were tested with a standard breathalyzer while color vision were studied using Farnsworth Munsell 100 Hue Color Vision Tests. Keywords: Col

  15. Local hypertrichosis: A rare complication of a temporary henna tattoo.

    Science.gov (United States)

    Akpolat, Nebahat Demet; Aras, Arzu

    2016-01-01

    Temporary henna tattoos have become increasingly widespread among children and young people, especially in holiday spots in recent years. Although reactions to henna tattoo are becoming progressively more common, only few cases of a henna pseudo-tattoo resulting in temporary hypertrichosis have been reported so far. Here, we have reported a 5-year-old girl who developed allergic contact dermatitis and localized hypertrichosis on her right arm after application of temporary henna tattoo during summer holiday.

  16. BioEnterics Intragastric Balloon (BIB) versus Spatz Adjustable Balloon System (ABS): Our experience in the elderly.

    Science.gov (United States)

    Russo, Teresa; Aprea, Giovanni; Formisano, Cesare; Ruggiero, Simona; Quarto, Gennaro; Serra, Raffaele; Massa, Guido; Sivero, Luigi

    2017-02-01

    The BioEnterics Intragastric Balloon (BIB) and the Spatz Adjustable Balloon System (ABS) are in fact recommended for weight reduction as a bridge to bariatric surgery. We retrospected studied patients with body mass index (BMI) and age ranges of 37-46 and 70-80 years, respectively, who had undergone BIB from January 2010 to July 2012 and prospected studied patients who had undergone Spatz balloon from July 2012 to August 2014. The aim of this study is to compare BIB and Spatz in terms of weight loss, complications, and maintenance of weight after removal. For both procedures, the median weight loss was 20 ± 3 kg, median BMI at the end of the therapy was 32 ± 2, and no severe complication occurred. Copyright © 2016 IJS Publishing Group Ltd. Published by Elsevier Ltd. All rights reserved.

  17. Three dimensional intravascular ultrasonic assessment of the local mechanism of restenosis after balloon angioplasty

    NARCIS (Netherlands)

    M.A. Costa (Marco); P.J. de Feyter (Pim); K. Kozuma (Ken); A.L. Gaster; M. Sabaté (Manel); I.P. Kay (Ian Patrick); J.M.R. Ligthart (Jürgen); P. Thayssen; M.J.B.M. van den Brand (Marcel); P.W.J.C. Serruys (Patrick); D.P. Foley (David); W.J. van der Giessen (Wim)

    2001-01-01

    textabstractOBJECTIVE: To assess the mechanism of restenosis after balloon angioplasty. DESIGN: Prospective study. PATIENTS: 13 patients treated with balloon angioplasty. INTERVENTIONS: 111 coronary subsegments (2 mm each) were analysed after balloon angioplasty and at a six month follow up using

  18. Prospective, randomized study of cutting balloon angioplasty versus conventional balloon angioplasty for the treatment of hemodialysis access stenoses.

    Science.gov (United States)

    Saleh, Hossam M; Gabr, Ahmed K; Tawfik, Mohamed M; Abouellail, Hesham

    2014-09-01

    The aim of this trial was to compare the rates of patency achieved by cutting and conventional balloon angioplasty to treat hemodialysis access stenoses. End-stage renal failure patients (at three tertiary referral centers) with significant hemodialysis access stenoses were prospectively randomized to have percutaneous transluminal angioplasty (PTA) by either cutting or conventional balloons. Patients with more than one hemodynamically significant stenosis were excluded. Kaplan-Meier method was used to compare the primary assisted patency rates for the two groups. The study randomized 623 patients into two groups, and the duration of follow-up was 15 ± 3 months. In the cutting balloon angioplasty group, the clinical success rate was 89% (282 of 316 stenoses). In the conventional balloon angioplasty group, the clinical success rate was 86% (265 of 307 stenoses; P = .637). Assisted primary patency for cutting PTA was statistically significantly higher at 6 months and 1 year (86% and 63%) than that for conventional PTA (56% and 37%, respectively; P = .037) in the treatment of stenosis of the graft-to-vein anastomosis. In the venous stenosis subgroup, equivalent primary assisted patency at 6 months and 1 year was observed for cutting PTA (84% and 55%) and conventional PTA (70% and 46%, respectively; P = .360). In the intragraft stenosis subgroup, primary assisted patency was equivalent at 6 months and 1 year for cutting PTA (67% and 39%) and conventional PTA (62% and 49%, respectively; P = .371). In the arterial anastomotic stenosis subgroup, assisted primary patency at 6 months and 1 year was equivalent for cutting PTA (70% and 30%) and conventional PTA (75% and 33%, respectively; P = .921). Cutting balloon angioplasty proved to be a safe and effective treatment of graft-to-vein anastomotic stenosis, with significantly higher patency than that of conventional balloon angioplasty. Copyright © 2014 Society for Vascular Surgery. Published by Mosby, Inc. All rights

  19. Penumbra Stroke System as an ''add-on'' for the treatment of large vessel occlusive disease following thrombolysis: first results

    Energy Technology Data Exchange (ETDEWEB)

    Struffert, Tobias; Engelhorn, Tobias; Richter, Gregor; Doerfler, Arnd [University of Erlangen-Nuremberg, Department of Neuroradiology, Erlangen (Germany); Koehrmann, Martin; Nowe, Tim; Schellinger, Peter D.; Schwab, Stefan [University of Erlangen-Nuremberg, Department of Neurology, Erlangen (Germany)

    2009-09-15

    The Penumbra Stroke System (PSS) was cleared for use in patients with ischemic stroke by the FDA in January 2008. We describe our experience of using this new system in acute large vessel occlusive disease following thrombolysis. Fifteen consecutive patients (mean age 60 years) suffering from acute ischemic stroke were treated with the PSS after intravenous or intra-arterial standard treatment with tissue plasminogen activator (n = 14) or ReoPro (n = 1). All patients presented with TIMI 3 before use of the PSS. Carotid stenting (n = 3) and intracranial balloon angioplasty or stenting (n = 2) were performed if indicated. Neurological evaluation was performed using the NIHSS score and the mRS score. Initial median NIHSS score in 12 patients with occlusions in the anterior circulation was 15; three patients with basilar artery occlusion presented with coma. Median symptom to procedure start time was 151 min. In the anterior circulation, 9 of the 12 target vessels were recanalised successfully (TIMI 2 and 3). The rate of patients with independent clinical outcome (mRS {<=} 2) was 42%. One patient died 5 days after unsuccessful treatment, one after 28 days and one after 85 days owing to heart attack. Basilar artery occlusions could be recanalised in all cases to TIMI 3. The clinical result after 90 days was mRS 4 in two cases and mRS 5 in one case. Symptomatic haemorrhage did not occur. The PSS can safely be used for recanalisation in patients with acute ischemic stroke due to large vessel occlusion, who have already received thrombolysis treatment. The recanalisation rate was 80%. Symptomatic haemorrhage did not occur. Randomized trials may demonstrate that endovascular mechanical thrombectomy improves patient outcome. (orig.)

  20. Metabolic syndrome and central retinal artery occlusion

    Directory of Open Access Journals (Sweden)

    Kosanović-Jaković Natalija

    2005-01-01

    Full Text Available Background. The accumulation of risk factors for central retinal artery occlusion can be seen in a single person and might be explained by the metabolic syndrome. Case report. We presented the case of a 52-year-old man with no light perception in his right eye. The visual loss was monocular and painless, fundoscopy showed central retinal artery occlusion and the laboratory investigation showed the raised erythrocyte sedimentation rate of 105 mm/h and the raised C-reactive protein of 22 mg/l. Specific laboratory investigations and fluorescein angiography excluded the presence of vasculitis, collagen vascular diseases, hypercoagulable state and antiphospholipid syndrome. Conclusion. The patient met all the five of the National Cholesterol Education Program (NCEP criteria for the metabolic syndrome: hypertension, abnormal lipid profile, abnormal glucose metabolism, obesity and hyperuricemia. Measurement of C-reactive protein is useful for the assessment of therapeutic systemic effect on any abnormality in the metabolic syndrome. Individual therapy for all risk factors in the metabolic syndrome is necessary to prevent complications such as cardiovascular, retinal vascular diseases and stroke.

  1. Functional magnetic resonance imaging of brain activity during chewing and occlusion by natural teeth and occlusal splints.

    Science.gov (United States)

    Kordass, Bernd; Lucas, Christian; Huetzen, Daniel; Zimmermann, Christian; Gedrange, Tomas; Langner, Soenke; Domin, Martin; Hosten, Norbert

    2007-01-01

    Brain imaging based on functional magnetic resonance (fMRI) is a useful tool for examination of neuronal networks and cerebral structures subserving visiospatial function. The purpose of this study was to compare the brain activity during chewing and occlusal function in centric occlusion on natural teeth or on occlusal splints. Four tasks were performed by 13 healthy, fully dentate subjects (21-32 years old, 6 female and 7 male): occlusal tap-tap movements in centric occlusion by natural teeth, after application of a maxillary occlusal splint and chewing movements on left and right sided rubberdam strips. In order to reveal which areas of the brain were more strongly activated, conjunction analyses between the different tasks were performed for each subject and for the average values of brain signal activity of all subjects. Whilst several known foci of activity were subtracted, differences of significant activity rested in areas of the sensorimotor cortex. Mainly ipsitaterality of hemispheres concerned the left and right sided chewing, whereas the conjunction between tap-tap movements on natural teeth and splint occlusion indicated only one weak, but significant activation foci. The study confirms fMRT as one of the most useful developing methods to clear up neuro-cortical effectiveness of occlusion and occlusal therapy.

  2. The impact of numeric and graphic displays of ST-segment deviation levels on cardiologists' decisions of reperfusion therapy for patients with acute coronary occlusion.

    Science.gov (United States)

    Nimmermark, Magnus O; Wang, John J; Maynard, Charles; Cohen, Mauricio; Gilcrist, Ian; Heitner, John; Hudson, Michael; Palmeri, Sebastian; Wagner, Galen S; Pahlm, Olle

    2011-01-01

    The study purpose is to determine whether numeric and/or graphic ST measurements added to the display of the 12-lead electrocardiogram (ECG) would influence cardiologists' decision to provide myocardial reperfusion therapy. Twenty ECGs with borderline ST-segment deviation during elective percutaneous coronary intervention and 10 controls before balloon inflation were included. Only 5 of the 20 ECGs during coronary balloon occlusion met the 2007 American Heart Association guidelines for ST-elevation myocardial infarction (STEMI). Fifteen cardiologists read 4 sets of these ECGs as the basis for a "yes/no" reperfusion therapy decision. Sets 1 and 4 were the same 12-lead ECGs alone. Set 2 also included numeric ST-segment measurements, and set 3 included both numeric and graphically displayed ST measurements ("ST Maps"). The mean (range) positive reperfusion decisions were 10.6 (2-15), 11.4 (1-19), 9.7 (2-14), and 10.7 (1-15) for sets 1 to 4, respectively. The accuracies of the observers for the 5 STEMI ECGs were 67%, 69%, and 77% for the standard format, the ST numeric format, and the ST graphic format, respectively. The improved detection rate (77% vs 67%) with addition of both numeric and graphic displays did achieve statistical significance (P graphic displays. Acute coronary occlusion detection rate was low for ECGs meeting STEMI criteria, and this was improved by adding ST-segment measurements in numeric and graphic forms. These results merit further study of the clinical value of this technique for improved acute coronary occlusion treatment decision support. Copyright © 2011 Elsevier Inc. All rights reserved.

  3. Tornus catheter facilitated recanalization of chronic total occlusions--another niche device for a difficult lesion subset.

    Science.gov (United States)

    Liu, Rex; Pershad, Ashish

    2008-01-01

    One of the last frontiers facing interventionalists is the treatment of chronic total occlusions. Chronic total occlusions (CTO) are present in about one-third of all diagnostic coronary angiograms. Recanalizations of these CTOs have demonstrated a trend towards lower mortality. Unfortunately, use of standard angioplasty equipment has only resulted in a 50-60% success rate.5,6,7 Several recently developed guidewires have increased success rates to 79-90%. Further success in CTO revascularization has been improved by use of novel techniques such as crossing the lesion in a retrograde fashion from collateral vessels. Niche devices such as the Frontrunner CTO catheter (Lumend Inc., Johnson and Johnson, Picataway, NJ) have also facilitated in successful treatment of CTOs. Unfortunately, none of these developments address the issue of deliverability of angioplasty balloons and stents. A newly developed device, the Tornus catheter (Asahi Intech; Abbot Vascular, Redwood City, CA), plays a niche role in the recanalization of this lesion subset. The following contains two case reports which highlight successful revascularization of CTOs with utilization of this new catheter.

  4. Measurement of pleural pressure swings with a fluid-filled esophageal catheter vs pulmonary artery occlusion pressure.

    Science.gov (United States)

    Verscheure, S; Massion, P B; Gottfried, S; Goldberg, P; Samy, L; Damas, P; Magder, S

    2017-02-01

    Pleural pressure measured with esophageal balloon catheters (Peso) can guide ventilator management and help with the interpretation of hemodynamic measurements, but these catheters are not readily available or easy to use. We tested the utility of an inexpensive, fluid-filled esophageal catheter (Peso) by comparing respiratory-induced changes in pulmonary artery occlusion (Ppao), central venous (CVP), and Peso pressures. We studied 30 patients undergoing elective cardiac surgery who had pulmonary artery and esophageal catheters in place. Proper placement was confirmed by chest compression with airway occlusion. Measurements were made during pressure-regulated volume control (VC) and pressure support (PS) ventilation. The fluid-filled esophageal catheter provided a high-quality signal. During VC and PS, change in Ppao (∆Ppao) was greater than ∆Peso (bias = -2 mm Hg) indicating an inspiratory increase in cardiac filling. During VC, ∆CVP bias was 0 indicating no change in right heart filling, but during PS, CVP fell less than Peso indicating an inspiratory increase in filling. Peso measurements detected activation of expiratory muscles, development of non-west zone 3 lung conditions during inspiration, and ventilator-triggered inspiratory efforts. A fluid-filled esophageal catheter provides a high-quality, easily accessible, and inexpensive measure of change in pleural pressure and provided insights into patient-ventilator interactions. Copyright © 2016 Elsevier Inc. All rights reserved.

  5. Dental occlusion: modern concepts and their application in implant prosthodontics.

    Science.gov (United States)

    Carlsson, Gunnar E

    2009-01-01

    The aim of this article was to review the literature on various aspects of occlusion related to implant prosthodontics, using PubMed and the Cochrane library. Even if the number of studies on implants and prosthodontics is very large, no randomized controlled trials or Cochrane reviews were found on the possible influence of occlusal design or characteristics of occlusion on treatment outcome. Therefore, studies and articles of a lower evidence level were accepted as the main part of the review. The widely spread opinion that implants are superior to natural teeth was refuted by two recent consensus conferences, which concluded that the long-term outcome of implant restorations is not better than that of natural teeth. No controlled studies on the optimal features of a harmonious natural and/or restored occlusion, including implant prostheses, were found. Nor was there any evidence that more sophisticated methods in jaw registration, e.g., using face-bows and adjustable articulators, compared with simpler methods, will yield better clinical prosthodontic results. This article discusses, among other things, concepts of occlusion of implant-supported restorations, occlusal material, cantilevers, and occlusal risk factors. Within the limitations of the review, it was concluded that many factors can influence implant failure and peri-implant bone loss but that little is known of the relative importance of such factors. Most probably, however, occlusal factors and details of occlusion are in general of minor importance for the outcome of implant restorations. Occlusion can be managed successfully by using simple methods for jaw registration and different occlusal concepts.

  6. Results from GLAST-LAT Prototype Balloon Experiment

    Science.gov (United States)

    Kamae, Tuneyoshi

    2002-04-01

    The GLAST Large Area Telescope (LAT) is a pair-production high-energy (>20 MeV) gamma-ray telescope being built by an international partnership of astrophysicists and particle physicists for a satellite launch in 2006, designed to study a wide variety of high-energy astrophysical phenomena. As part of the development effort, the collaboration has built a Balloon Flight Engineering Model (BFEM) for flight on a high-altitude scientific balloon. The BFEM is approximately the size of one of the 16 GLAST-LAT towers and contains all the components of the full instrument: plastic scintillator anticoincidence system (ACD), high-Z foil/Si strip pair-conversion tracker (TKR), CsI hodoscopic calorimeter (CAL), triggering and data acquisition electronics (DAQ), commanding system, power distribution, telemetry, real-time data display, and ground data processing system. The goal of the balloon flight was to demonstrate the performance of this instrument configuration under conditions similar to the low earth orbit and to study background produced by cosmic ray particles. We obtained from a balloon flight at Palestine, Texas, on August 4, 2001, nearly 2 million \\x81gunbiased\\x81h event samples extracted gamma-rays from high-background environment. The data have been compared with a computer simulation based a cosmic ray flux model.

  7. Balloon dacryocystoplasty study in the management of adult epiphora.

    LENUS (Irish Health Repository)

    Fenton, S

    2012-02-03

    PURPOSE: To determine the efficacy of dacryocystoplasty with balloon dilation in the treatment of acquired obstruction of the nasolacrimal system in adults. METHODS: Balloon dacryocystoplasty was performed in 52 eyes of 42 patients under general anaesthetic. A Teflon-coated guidewire was introduced through the canaliculus and manipulated through the nasolacrimal system and out of the nasal aperture. A 4 mm wide 3 cm coronary angioplasty balloon catheter was threaded over the guidewire in a retrograde fashion and dilated at the site of obstruction. RESULTS: There was complete obstruction in 30% of cases and partial obstruction in 70%. The most common site of obstruction was the nasolacrimal duct. The procedure was technically successful in 94% of cases. The overall re-obstruction rate was 29% within 1 year of the procedure. There was an anatomical failure rate of 17% for partial obstruction and 69% for complete obstruction within 1 year. CONCLUSIONS: Balloon dacryocystoplasty has a high recurrence rate. There may be a limited role for this procedure in partial obstructions. Further refinements of the procedure are necessary before it can be offered as a comparable alternative to a standard surgical dacryocystorhinostomy.

  8. Long Duration Balloon flights development. (Italian Space Agency)

    Science.gov (United States)

    Peterzen, S.; Masi, S.; Dragoy, P.; Ibba, R.; Spoto, D.

    Stratospheric balloons are rapidly becoming the vehicle of choice for near space investigations and earth observations by a variety of science disciplines. With the ever increasing research into climatic change, earth observations, near space research and commercial component testing, instruments suspended from stratospheric balloons offer the science team a unique, stable and reusable platform that can circle the Earth in the polar region or equatorial zone for thirty days or more. The Italian Space Agency (ASI) in collaboration with Andoya Rocket Range (Andenes, Norway) has opened access in the far northern latitudes above 78º N from Longyearbyen, Svalbard. In 2006 the first Italian UltraLite Long Duration Balloon was launched from Baia Terra Nova, Mario Zuchelli station in Antarctica and now ASI is setting up for the their first equatorial stratospheric launch from their satellite receiving station and rocket launch site in Malindi, Kenya. For the equatorial missions we have analysed the statistical properties of trajectories considering the biennial oscillation and the seasonal effects of the stratospheric winds. Maintaining these launch sites offer the science community 3 point world coverage for heavy lift balloons as well as the rapidly deployed Ultra-light payloads and TM systems ASI developed to use for test platforms, micro experiments, as well as a comprehensive student pilot program. This paper discusses the development of the launch facilities and international LDB development.

  9. Ultrasonic resonant modes of piezoelectric balloons under internal pressure.

    Science.gov (United States)

    Denham, Lori Vidal; Rice, David A

    2012-09-01

    Properties of a piezoelectric polymeric angioplasty balloon that may decrease the problems of acute closure and restenosis are evaluated in this study. Polyvinylidene difluoride (PVDF), a piezoelectric and pyroelectric polymer, has sufficient strength to serve as a standard angioplasty balloon as well as functioning as an ultrasonic transmitter and/or receiver. These properties enable potential therapeutic applications using ultrasound such as plaque ablation and sonotherapy as well as vulnerable plaque diagnosis using thermography. This study investigates the resonant structure of the PVDF balloon catheter in the frequency range 5-100 kHz. Vibrations of the piezoelectric balloon are modeled using cylindrical shell theory and compared with the observed modal frequencies of PVDF cylinders with and without internal pressure. Modal frequencies are determined by measuring the near-field pressure response of the PVDF cylinders using a high frequency microphone. A rich nodal structure is observed between 5 and 100 kHz with peak relative amplitudes measured between 42 and 45 kHz. Higher order modes for cylinders with 9 μm and 28 μm wall thickness increase in frequency as the internal pressure is increased. Experimental measurements confirm theoretical models that predict both pressure-dependent and pressure-independent resonant frequencies. Frequencies of pressure-dependent modes are calculated within 2.2% of measured values at high pressure.

  10. Percutaneous balloon kyphoplasty for the treatment of vertebral compression fractures.

    Science.gov (United States)

    Yu, Chia-Wei; Hsieh, Ming-Kai; Chen, Lih-Huei; Niu, Chi-Chien; Fu, Tsai-Sheng; Lai, Po-Liang; Chen, Wen-Jer; Chen, Wen-Chien; Lu, Meng-Ling

    2014-01-14

    Vertebral compression fractures (VCFs) constitute a major health care problem, not only because of their high incidence but also because of their direct and indirect negative impacts on both patients' health-related quality of life and costs to the health care system. Two minimally invasive surgical approaches were developed for the management of symptomatic VCFs: balloon kyphoplasty and vertebroplasty. The purpose of this study was to evaluate the effectiveness and safety of balloon kyphoplasty in the treatment of symptomatic VCFs. Between July 2011 and June 2012, one hundred and eighty-seven patients with two hundred and fifty-one vertebras received balloon kyphoplasty in our hospital. There were sixty-five male and one hundred and twenty-two female patients with an average age of 74.5 (range, 61 to 95 years). The pain symptoms and quality of life, were measured before operation and at one day, three months, six months and one year following kyphoplasty. Radiographic data including restoration of kyphotic angle, anterior vertebral height, and any leakage of cement were defined. The mean visual analog pain scale decreased from a preoperative value of 7.7 to 2.2 at one day (p kyphoplasty not only rapidly reduced pain and disability but also restored sagittal alignment in our patients at one-year follow-up. The treatment of osteoporotic vertebral compression fractures with balloon kyphoplasty is a safe, effective, and minimally invasive procedure that provides satisfactory clinical results.

  11. Binary restenosis post-cutting balloon ptca before stenting

    National Research Council Canada - National Science Library

    Flores, Jesús Flores; Villada, José Antonio Palomo; Ruiz, Enrique Bernal; Hernández, Jaime Santiago; Silvestre, Armando Montoya; Sandoval, Raúl Astudillo; Gallegos, Joel Estrada; Velasco, Arturo Abundes; Campa, Javier Farell

    2006-01-01

    .... From January 2003 to June 2004, 1,300 PTCA with stent were made; we selected a group of 39 patients in whom the cutting balloon was used (3.3%). Average age was 60.4+/-9.2 years. There were 32 men (80%) and 8 women (20...

  12. Virginia Space Grant Consortium Upper Atmospheric Payload Balloon System (Vps)

    Science.gov (United States)

    Marz, Bryan E.; Ash, Robert L.

    1996-01-01

    This document provides a summary of the launch and post-launch activities of Virginia Space Grant Consortium Upper Atmospheric Payload Balloon System, V(ps). It is a comprehensive overview covering launch activities, post-launch activities, experimental results, and future flight recommendations.

  13. Malfunctioning Plastic Biliary Endoprosthesis: Percutaneous Transhepatic Balloon Pulling Technique

    Science.gov (United States)

    Rossi, Umberto G.; Rigamonti, Paolo; Cariati, Maurizio

    2013-01-01

    Percutaneous transhepatic removal techniques for malfunctioning plastic biliary endoprosthesis are considered safe and efficient second-line strategies, when endoscopic procedures are not feasible. We describe the percutaneous transhepatic balloon pulling technique in a patient with an unresectable malignant hilar cholangiocarcinoma. PMID:23984158

  14. Malfunctioning Plastic Biliary Endoprosthesis: Percutaneous Transhepatic Balloon Pulling Technique

    Directory of Open Access Journals (Sweden)

    Umberto G. Rossi

    2013-01-01

    Full Text Available Percutaneous transhepatic removal techniques for malfunctioning plastic biliary endoprosthesis are considered safe and efficient second-line strategies, when endoscopic procedures are not feasible. We describe the percutaneous transhepatic balloon pulling technique in a patient with an unresectable malignant hilar cholangiocarcinoma.

  15. Overview of the TILDAE High-Altitude Balloon Mission

    Science.gov (United States)

    Godbole, N. H.; Maruca, B.; Marino, R.; Sundkvist, D. J.; Constantin, S.; Zimmerman, H.; Carbone, V.

    2016-12-01

    Though the presence of intermittent turbulence in the stratosphere has been well established, much remains unknown about it. In situ observations of this phenomenon, which have provided the greatest detail of it, have typically been achieved via sounding balloons (i.e., small balloons which burst at peak altitude) carrying constant-temperature "hot wire" anemometers (CTAs). The Turbulence and Intermittency Long-Duration Atmospheric Experiment (TILDAE) was developed to test a new paradigm for stratospheric observations. Rather than flying on a sounding balloon, TILDAE was incorporated as an "add-on" experiment to the payload of a NASA long-duration balloon mission that launched in January, 2016 from McMurdo Station, Antarctica. Furthermore, TILDAE's key instrument was a sonic anemometer, which (relative to a CTA) provides better-calibrated measurements of wind velocity and more-robust separation of velocity components. This presentation focuses on the technical details of TILDAE's instrumentation and the performance thereof during its flight. Potential design improvements for future flights are also discussed.

  16. Percutaneous transvenous angioplasty of inferior vena cava by balloon dilatation

    Energy Technology Data Exchange (ETDEWEB)

    Suh, Kyung Suk; Kim, Jae Kyu; Park, Jin Gyun; Kang, Heung Keun; Chung, Hyon De; Kim, Shin Kon; Chung, Sang Young [Chonnam National University College of Medicine, Kwangju (Korea, Republic of)

    1989-10-15

    3 patients with membranous (2 patients) and segmental (1 patient) obstruction of IVC were successfully treated by percutaneous transvenous angioplasty using balloon catheter. Improvements of clinical and radiological findings could be obtained after procedures. Relatively good patency was obtained in all cases without complications. This procedure can be applied safely to membranous or segmental obstructions of IVC and elsewhere in the venous systems.

  17. Scientific Ballooning Technologies Workshop STO-2 Thermal Design and Analysis

    Science.gov (United States)

    Ferguson, Doug

    2016-01-01

    The heritage thermal model for the full STO-2 (Stratospheric Terahertz Observatory II), vehicle has been updated to model the CSBF (Columbia Scientific Balloon Facility) SIP-14 (Scientific Instrument Package) in detail. Analysis of this model has been performed for the Antarctica FY2017 launch season. Model temperature predictions are compared to previous results from STO-2 review documents.

  18. Balloon-borne gamma-ray telescope with nuclear emulsion

    OpenAIRE

    Takahashi, Satoru; Group, for the Emulsion Gamma-ray Telescope

    2010-01-01

    By detecting the beginning of electron pairs with nuclear emulsion, precise gamma-ray direction and gamma-ray polarization can be detected. With recent advancement in emulsion scanning system, emulsion analyzing capability is becoming powerful. Now we are developing the balloon-borne gamma-ray telescope with nuclear emulsion. Overview and status of our telescope is described.

  19. 28. Critical pulmonary valve stenosis: Medical management beyond balloon dilation

    Directory of Open Access Journals (Sweden)

    Muhammad Arif Khan

    2015-10-01

    Conclusion: Phentolamine and/or Captopril have a therapeutic role in neonates with critical PVS who remain oxygen dependent after balloon dilation. Both medicationslead to vasodilatation of pulmonary and systemic vascularity. They facilitate inflowto the right ventricle. Right to left shunt across a PFO or/ ASD minimizesand saturation improves leading to a significantreduction in length of hospitalization.

  20. Complications of flow-directed balloon-tipped catheters.

    Science.gov (United States)

    Smart, F W; Husserl, F E

    1990-01-01

    Acute or short-term complications following the use of flow-directed balloon-tipped catheters are well recognized. Long-term sequelae are rarely reported. We report herein an early complication of pulmonary arterial rupture with infarction followed by the delayed development of a pulmonary arterial aneurysm.

  1. Latex micro-balloon pumping in centrifugal microfluidic platforms.

    Science.gov (United States)

    Aeinehvand, Mohammad Mahdi; Ibrahim, Fatimah; Harun, Sulaiman Wadi; Al-Faqheri, Wisam; Thio, Tzer Hwai Gilbert; Kazemzadeh, Amin; Madou, Marc

    2014-03-07

    Centrifugal microfluidic platforms have emerged as point-of-care diagnostic tools. However, the unidirectional nature of the centrifugal force limits the available space for multi-step processes on a single microfluidic disc. To overcome this limitation, a passive pneumatic pumping method actuated at high rotational speeds has been previously proposed to pump liquid against the centrifugal force. In this paper, a novel micro-balloon pumping method that relies on elastic energy stored in a latex membrane is introduced. It operates at low rotational speeds and pumps a larger volume of liquid towards the centre of the disc. Two different micro-balloon pumping mechanisms have been designed to study the pump performance at a range of rotational frequencies from 0 to 1500 rpm. The behaviour of the micro-balloon pump on the centrifugal microfluidic platforms has been theoretically analysed and compared with the experimental data. The experimental data show that the developed pumping method dramatically decreases the required rotational speed to pump liquid compared to the previously developed pneumatic pumping methods. It also shows that within a range of rotational speed, a desirable volume of liquid can be stored and pumped by adjusting the size of the micro-balloon.

  2. Conservative therapy versus intra-gastric balloon in treatment of ...

    African Journals Online (AJOL)

    diet and exercises) versus intra-gastric balloon in PWS patients. Ten children born with PWS from both sexes ranging in age from 8 to 15 years were assigned into two groups of equal number. Study group I received conservative therapy in the ...

  3. Balloon atrial septostomy under echocardiographic guide: case series

    Directory of Open Access Journals (Sweden)

    SM Meraji

    2012-12-01

    Full Text Available Background: Balloon atrial septostomy is an emergent procedure in pediatric cardiology. Nowadays, most patients in need of the procedure have acceptable outcomes after surgical repair. Thus, it is important to perform this procedure as safe as possible. By performing early arterial switch operation and prostaglandin infusion, the rate of balloon atrial septostomy has markedly decreased. However, not all centers performing early arterial switch repairs have abandoned atrial septostomy, even in patients who respond favorably to prostaglandin infusion.Case presentation: In total, eight 1- to 15-day old term neonates admitted in Shahid Rajaee Heart Center in Tehran, Iran from October 2009 to February 2011, with congenital heart diseases were scheduled for balloon atrial septostomy. In six cases the procedure was done exclusively under echocardiographic guidance and in two cases with the help of fluoroscopy. Success was defined as the creation of an atrial septal defect with a diameter equal to or more than 5 mm and ample mobility of its margins.Results: Male sex was predominant (87% and the mean age of the neonates was six days. The diagnosis in all cases was simple transposition of great arteries. The procedure was successful in all patients with any cardiovascular complication.Conclusion: Balloon atrial septostomy is an emergent procedure that can be done safely and effectively under echocardiographic guidance. According to the feasibility of this technique it could be performed fast, safe and effective at bedside, avoiding patient transportation to hemodynamic laboratory or referral center.

  4. Balloon valvuloplasty for severe mitral valve stenosis in pregnancy ...

    African Journals Online (AJOL)

    Balloon valvuloplasties for severe mitral stenosis were performed on 11 pregnant patients with excellent resutts and no complications. The mitral valve area was increased from a mean of 0.9 cnr to 2.1 cnr. There was no clinically significant mitral regurgitation. The pregnancies proceeded normally to delivery at or near tenn, ...

  5. Anchor balloons assisted deep intubation of 5F catheters for ...

    African Journals Online (AJOL)

    2015-07-24

    Jul 24, 2015 ... other lesions that cannot be crossed, even with the aforementioned techniques. Here, we report four ..... balloon technique may damage the anchored branch. The 5F “child‑in‑mother” catheter would be another .... Rev Esp Cardiol (Engl Ed) 2013;66:636‑43. 2. Chambers JW, Feldman RL, Himmelstein SI, ...

  6. Medicamentous thrombolysis in acute occlusions of extremity arteries; Medikamentoese Thrombolyse bei akuten Verschluessen der Extremitaetenarterien

    Energy Technology Data Exchange (ETDEWEB)

    Kittner, T. [Staedtisches Klinikum Dresden-Friedrichstadt, Radiologische Klinik, Dresden (Germany); Stelzner, C. [Staedtisches Klinikum Dresden-Friedrichstadt, II. Medizinische Klinik, Dresden (Germany)

    2008-08-15

    Local catheter-directed thrombolysis for thromboembolic extremity artery or bypass occlusions is a promising therapeutic option with comparatively low complication rates if the severity of the ischemia does not require an urgent surgical revascularization. This therapeutic decision has to be made by the vascular team under consideration of individual circumstances and contraindications. Apart from an adequate dosage, a strict intrathrombotic application of the fibrinolytic agent and careful clinical monitoring, including surveillance of the coagulation system is necessary. If needed, the thrombolysis therapy can be combined with interventional thrombaspiration and balloon dilatation or surgical correction of an underlying lesion. (orig.) [German] Die lokale intraarterielle Fibrinolysetherapie ist eine aussichtsreiche und vergleichbar komplikationsarme Therapieoption bei akuten thrombembolischen Verschluessen der Extremitaetenarterien, wenn der klinische Schweregrad der Ischaemie und die Verschlusslokalisation nicht die sofortige chirurgische Revaskularisation erfordern bzw. erlauben. Die Therapieentscheidung muss unter Beachtung eventuell vorliegender Kontraindikationen fuer den Einzelfall im interdisziplinaeren Gefaessteam getroffen werden. Neben einer adaequaten Dosierung sind die streng intrathrombotische Applikation sowie ein sorgfaeltiges klinisches und Gerinnungsmonitoring erforderlich. Bedarfsweise kann die Lysetherapie mit Verfahren der interventionellen Thrombaspiration sowie Ballondilatation oder einer chirurgischen Korrektur einer zugrunde liegenden Laesion kombiniert werden. (orig.)

  7. Platelet-targeted microbubbles inhibit re-occlusion after thrombolysis with transcutaneous ultrasound and microbubbles.

    Science.gov (United States)

    Zhou, X B; Qin, H; Li, J; Wang, B; Wang, C B; Liu, Y M; Jia, X D; Shi, N

    2011-04-01

    Microbubbles (MBs) can augment the acoustic cavitation' (US), thereby facilitating the thrombolysis of external ultrasound. But we observed re-thrombosis after successful thrombolysis by MBs and transcutaneous ultrasound in an endothelium injury model. This study was designed to explore whether platelet-targeted MBs can prevent the reformation of thrombi. Arterial injury was induced in canine femoral arteries with balloon, and the arteries were completely thrombotically occluded. The arteries were treated with intra-arterial MBs or platelet-targeted MBs (TMB) and transcutaneous low frequency ultrasound (LFUS) to achieve complete thrombolysis. The arterial flow was monitored with angiogram for 4h following treatment. Results showed that both MBs and TMBs produced successful dissolution of clots in the presence of ultrasound. The re-occlusion began to occur 1h after thrombolysis in MB/LFUS treatment, and 7 of 8 arteries were re-occluded within 3h. Most of the arteries (7 of 8) in the TMB/LFUS group remained patent for 4h following treatment. The flow tended to decrease after thrombolysis in MB/LFUS treatment. These results indicated that platelet-targeted microbubbles were beneficial in preventing re-thrombosis in vivo and microbubbles served as good carrier of thrombolytic and anticoagulation drugs. Copyright © 2010 Elsevier B.V. All rights reserved.

  8. Lightweight Liquid Helium Dewar for High-Altitude Balloon Payloads

    Science.gov (United States)

    Kogut, Alan; James, Bryan; Fixsen, Dale

    2013-01-01

    Astrophysical observations at millimeter wavelengths require large (2-to-5- meter diameter) telescopes carried to altitudes above 35 km by scientific research balloons. The scientific performance is greatly enhanced if the telescope is cooled to temperatures below 10 K with no emissive windows between the telescope and the sky. Standard liquid helium bucket dewars can contain a suitable telescope for telescope diameter less than two meters. However, the mass of a dewar large enough to hold a 3-to-5-meter diameter telescope would exceed the balloon lift capacity. The solution is to separate the functions of cryogen storage and in-flight thermal isolation, utilizing the unique physical conditions at balloon altitudes. Conventional dewars are launched cold: the vacuum walls necessary for thermal isolation must also withstand the pressure gradient at sea level and are correspondingly thick and heavy. The pressure at 40 km is less than 0.3% of sea level: a dewar designed for use only at 40 km can use ultra thin walls to achieve significant reductions in mass. This innovation concerns new construction and operational techniques to produce a lightweight liquid helium bucket dewar. The dewar is intended for use on high-altitude balloon payloads. The mass is low enough to allow a large (3-to-5-meter) diameter dewar to fly at altitudes above 35 km on conventional scientific research balloons without exceeding the lift capability of the balloon. The lightweight dewar has thin (250- micron) stainless steel walls. The walls are too thin to support the pressure gradient at sea level: the dewar launches warm with the vacuum space vented continuously during ascent to eliminate any pressure gradient across the walls. A commercial 500-liter storage dewar maintains a reservoir of liquid helium within a minimal (hence low mass) volume. Once a 40-km altitude is reached, the valve venting the vacuum space of the bucket dewar is closed to seal the vacuum space. A vacuum pump then

  9. Mesiodistal tooth angulation to segmental occlusal plane in panoramic radiography

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jae Duk; Kim, Jin Soo; You, Choong Hyun [Chosun University College of Medicine, Kwangju (Korea, Republic of)

    2005-03-15

    To evaluate the stability of the segmental occlusal plane and anatomical line as the reference line for measuring the mesiodistal tooth angulation in panoramic radiography and to determine the mean angle and the range of the mesiodistal tooth angulation in Korean population with normal occlusions. Twenty nine subjects (15 men, 14 women) with normal occlusion were selected. A total of 29 panoramic radiograms were taken at normal head position and then 10 images of 5 subjects selected were repeatedly taken with repositioning 2 times at each of the head down (V-shaped occlusion) and up (horizontal occulsion) for evaluation of stability of adopted reference lines by using PM2002CC (Planmeca, Finland). The images were traced with adoption of two test reference lines and the long axes of the teeth. The mesial angles formed by each reference line and the long axes of the teeth were measured and analyzed. With anatomical reference line, the mesiodistal tooth angulations of the molars showed the significant difference by over 5 degree between the normal and each changed head position. With segmented occlusal reference line, deviations of mesiodistal tooth angulations by the two changed head positions were less than 1 degree. The means, standard deviations, and maximum and minimum values of mesiodistal tooth angulations to segmental occlusal reference line on panoramic radiography were determined. It would appear that mesiodistal tooth angulations to segmental occlusal plane as reference line in panograms are predictable as standards of normal occlusion and useful for evaluation of tooth arrangement between adjacent teeth.

  10. Vascular occlusion in cut rose flowers - a survey

    NARCIS (Netherlands)

    Doorn, van W.G.

    1995-01-01

    The causes of low water uptake and water stress symptoms in cut rose flowers are briefly reviewed. Low water uptake is due to an occlusion, mainly located in the basal stem end. No evidence has been found for a reaction of the plant after cutting, in the formation of this occlusion. The blockage has

  11. Multi-cue pedestrian classification with partial occlusion handling

    NARCIS (Netherlands)

    Enzweiler, M.; Eigenstetter, A.; Schiele, B.; Gavrila, D.M.

    2010-01-01

    This paper presents a novel mixture-of-experts framework for pedestrian classification with partial occlusion handling. The framework involves a set of component-based expert classifiers trained on features derived from intensity, depth and motion. To handle partial occlusion, we compute expert

  12. Occlusion invariant face recognition using mean based weight ...

    Indian Academy of Sciences (India)

    In this paper, a novel occlusion invariant face recognition algorithm based on Mean based weight matrix (MBWM) technique is proposed. The proposed algorithm is composed of two phases—the occlusion detection phase and the MBWM based face recognition phase. A feature based approach is used to effectively detect ...

  13. Varying face occlusion detection and iterative recovery for face recognition

    Science.gov (United States)

    Wang, Meng; Hu, Zhengping; Sun, Zhe; Zhao, Shuhuan; Sun, Mei

    2017-05-01

    In most sparse representation methods for face recognition (FR), occlusion problems were usually solved via removing the occlusion part of both query samples and training samples to perform the recognition process. This practice ignores the global feature of facial image and may lead to unsatisfactory results due to the limitation of local features. Considering the aforementioned drawback, we propose a method called varying occlusion detection and iterative recovery for FR. The main contributions of our method are as follows: (1) to detect an accurate occlusion area of facial images, an image processing and intersection-based clustering combination method is used for occlusion FR; (2) according to an accurate occlusion map, the new integrated facial images are recovered iteratively and put into a recognition process; and (3) the effectiveness on recognition accuracy of our method is verified by comparing it with three typical occlusion map detection methods. Experiments show that the proposed method has a highly accurate detection and recovery performance and that it outperforms several similar state-of-the-art methods against partial contiguous occlusion.

  14. Retinal vein occlusion in Benin City, Nigeria | Uhumwangho ...

    African Journals Online (AJOL)

    Background: Retinal vein occlusion (RVO) is the most common occlusive retinal vascular disorder and results in varying degrees of visual loss. Aim: To determine the pattern of presentation, risk factors, and treatment outcomes in a group of patients with RVO seen in a tertiary hospital in Nigeria. Materials and Methods: ...

  15. Comorbidity in patients with branch retinal vein occlusion

    DEFF Research Database (Denmark)

    Bertelsen, Mette; Linneberg, Allan René; Rosenberg, Niels Thomas

    2012-01-01

    To evaluate comorbidity before and after the diagnosis of branch retinal vein occlusion to determine whether it is a consequence of arterial thickening and therefore could serve as a diagnostic marker for other comorbidities and to evaluate the risk factors for the development of such occlusion....

  16. Fundamentals of occlusion and restorative dentistry. Part I: basic principles.

    Science.gov (United States)

    Warreth, Abdulhadi; Ramadan, Marwa; Bajilan, Mustafa Raad; Ibieyou, Najia; El-Swiah, Jamal; Elemam, Ranya Faraj

    2015-01-01

    This article presents the basic principles of dental occlusion and an overview of this subject area, which is important for dental professionals. Clinical relevance: A sound knowledge of dental occlusion is important in order to improve dental treatment outcome and achieve a long-lasting restoration.

  17. [Clinical evaluation of unanatomic and long centric occlusal complete dentures].

    Science.gov (United States)

    Zhong, Qun; Chen, Shuang; Wu, Xue-yin; Li, Guo-qiang

    2011-08-01

    To compare and analyze the effect of unanatomic and long centric complete occlusal denture on the satisfaction of edentulous patients and mastication. Sixty edentulous patients with severe resorption of residual ridge were treated with unanatomic occlusal and long centric occlusal complete dentures. One month and three months after wearing dentures, the satisfaction evaluation from edentulous patients for the different complete dentures was analyzed, and the masticatory stroke was tested, the masticatory efficiency of the two complete dentures was detected by light absorption method. SPSS 11.0 software package was used for data analysis. Compared with unanatomic occlusal dentures, appearance, pronunciation and comfort of long centric occlusal denture wearers were not significantly different for one and three months (P>0.05). But the masticatory function of long centric occlusal denture wearers was significantly better than anatomic occlusal denture wearers (Pocclusion is feasible for restoration of masticatory efficiency of edentulous patients using long centric occlusal complete dentures, and they are more acceptable by edentulous patients with severe resorption of residual ridge.

  18. Importance of occlusion aspects in the completion of orthodontic treatment.

    Science.gov (United States)

    Oltramari, Paula Vanessa Pedron; Conti, Ana Cláudia de Castro Ferreira; Navarro, Ricardo de Lima; Almeida, Márcio Rodrigues de; Almeida-Pedrin, Renata Rodrigues de; Ferreira, Fernando Pedrin Carvalho

    2007-01-01

    The purpose of this study was to address the therapeutic goals regarding the static and functional occlusion in the completion of orthodontic treatment. For such purpose, a study population comprising 20 female treated Class II malocclusion subjects with an initial mean age of 11 years underwent a two-phase treatment (orthopedics and orthodontics). The patients were diagnosed in centric relation and were treated according to the six keys for normal occlusion and functional occlusal parameters (centric relation, vertical dimension, lateral and anterior guidances, occlusal contacts and direction of forces applied on the teeth). After removal of fixed mechanics, retainers were installed and maintained for two years. Five years after orthodontic completion, the occlusal stability of the patients was evaluated regarding molar relationship and overjet, measured in dental casts. All subjects maintained the normal molar relationship and correct overjet achieved at the end of treatment, indicating a fair level of occlusal stability. The importance of the criteria of the ideal functional occlusion to ensure a better stability after completion orthodontic treatment will be discussed in detail in this paper. In addition, some clinical situations in which localized adjustments are indicated for occlusal refinement will be described.

  19. Immediate occlusal versus non-occlusal loading of single zirconia implants. A multicentre pragmatic randomised clinical trial.

    Science.gov (United States)

    Cannizzaro, Gioacchino; Torchio, Cinzia; Felice, Pietro; Leone, Michele; Esposito, Marco

    2010-01-01

    To evaluate whether immediate non-occlusal loading of single zirconia implants could reduce early failures when compared to immediate occlusal loading. Forty partially edentulous patients who received one single zirconia implant (Z-Systems) at least 10 mm long and 3.25 mm wide inserted with a torque of at least 35 Ncm were randomised to immediate occlusal or non-occlusal loading groups. All patients received provisional acrylic crowns the same day of implant placement. Provisional crowns were replaced after 4 to 5 months by definitive full ceramic crowns. Outcome measures were implant success, any complications and peri-implant marginal bone levels. One year after loading, no patients had dropped out. Five implants (12.5%) failed early: three occlusally loaded and two non-occlusally loaded. Three complications occurred, all after delivery of the definitive crowns: one crown fractured (occlusal loading), one had to be remade after debridement because of hyperplastic tissues (occlusal loading), and one crown decemented (nonocclusal loading). These differences were not statistically significant. Both groups gradually lost periimplant bone in a highly statistically significant way. One year after loading, patients subjected to non-occlusal loading lost an average of 0.7 mm of peri-implant bone versus 0.9 mm in the occlusal group. This difference in bone loss between groups was not statistically significant. There was an association between immediate post-extractive implants and implant failures (P=0.01). Four of the 10 immediate post-extractive implants (40%) failed versus one out of 30 delayed implants (3%). The results of this study do not provide a conclusive answer to whether immediate non-occlusal loading may decrease implant failures. Immediately loaded zirconia implants placed in post-extractive sites had high failure rates.

  20. Occlusal tooth wear in patients of a dental school's prosthodontic department in Xi'an, China

    NARCIS (Netherlands)

    Meng, M.; Zhang, Q.; Witter, D.J.; Bronkhorst, E.M.; Creugers, N.H.J.; Ma, C.; Zhang, S.

    2014-01-01

    PURPOSE: To assess the relationships between occlusal tooth wear and occlusal conditions, chewing side preference, and occlusal guidance scheme. MATERIALS AND METHODS: A total of 257 Chinese adult dental school patients were categorized according to a hierarchical functional classification system.