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Sample records for ultrasound puncture tract

  1. Pre-puncture ultrasound guided epidural insertion before vaginal delivery.

    Science.gov (United States)

    Nassar, Mahmoud; Abdelazim, Ibrahim A

    2015-10-01

    Palpation method is widely used in clinical practice to identify the puncture site during combined spinal-epidural (CSE) blocks. Tuffier's line, is an anatomical landmark between two iliac crests (inter-cristal), which is widely used to identify the puncture site during CSE blocks is not always an indicator for specific vertebral level or inter-vertebral space. One hundred and Ten (110) women were scheduled for normal vaginal delivery and were randomized into two equal groups; palpation group and an ultrasound guided group to detect the efficacy of puncture ultrasound before CSE blocks to increase chances of successful CSE procedure on the first attempt and to reduce the number of attempts or punctures during insertion of CSE catheter. There were no significant differences between two studied groups regarding; maternal age, weight and height, while, there was a significant difference between two studied groups regarding; parity. Percentage of successful CSE procedure on the first attempt was significantly higher (67.27%) in ultrasound compared to palpation group (40%). Number of punctures (attempts) were significantly less in ultrasound (1.2 ± 0.6) compared to palpation group (2.3 ± 0.8) and the number of redirections was also significantly less in ultrasound (1.4 ± 0.5) compared to palpation group (2.8 ± 1.6). Although, time to identify puncture site was significantly longer in ultrasound compared to palpation group and total procedure time was longer in ultrasound (9.1 ± 1.5 min) compared to palpation group (6.2 ± 1.2 min), there was no significant difference between two studied groups regarding; time to identify puncture site and total procedure time. Two cases of dural puncture in palpation versus no cases in ultrasound group and two cases of intravascular catheter placement (one in each group), with no significant difference between two groups. Pre- puncture ultrasound guided epidural insertion before vaginal delivery, increases the chance of a

  2. Understanding of percutaneous puncture under guidance of ultrasound in treating peritoneal and perinephritic abscess

    International Nuclear Information System (INIS)

    Huang Liying; Wang Jiagang

    2010-01-01

    Objective: To explore the clinical value of percutaneous puncture under guidance of ultrasound in treating peritoneal abscess. Methods: To summarize 68 patients with peritoneal abscess underwent percutaneous puncture under guidance of ultrasound to analyse the method of operation and therapeutic effect. Results: effective power of percutaneous puncture under guidance of ultrasound in treating peritoneal abscess was 96.8%. Conclusion: Percutaneous puncture under guidance of ultrasound in treating peritoneal abscess may avoid injury induced by blinded puncture, with characteristic of easier operation, slighter trauma. higher safety, significant therapeutic effect, and can be spreaded to the clinical application. (authors)

  3. Gelatin model for training ultrasound-guided puncture

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    Alexandre Campos Moraes Amato

    2015-09-01

    Full Text Available BACKGROUND: It is indispensable that members of the medical profession receive the technical training needed to enable them to rapidly obtain effective vascular access. Training procedures should be used judiciously to familiarize students with the technique. However, existing models are expensive or ineffective, and models need to be developed that are similar to what will be encountered in real patients.OBJECTIVES: To demonstrate creation and application of a gelatin model for training ultrasound-guided puncture.METHOS: The model was made using a mixture of colorless gelatin and water in a transparent plastic receptacle with two pairs of orifices of different diameters, through which two plastic tubes were inserted, to simulate blood vessels.RESULTS: The model was a close approximation to the real medical procedure in several aspects, since gelatin has a similar consistency to human tissues, providing a more faithful reproduction of the tactile sensation at the moment when the needle reaches the interior of a vessel and its contents are aspirated.CONCLUSIONS: The method proposed here can be used to easily construct a low-cost model using everyday materials that is suitable for large-scale training of ultrasound-guided puncture.

  4. The transabdominal chorionic villus sampling puncture guided by color Doppler ultrasound during early pregnancy

    International Nuclear Information System (INIS)

    Liang Weixiang; Chen Zhiyi; Yuan Wenlin; Cai Kuan; Zhu Junlin; Wang Weiqun; Chen Xia

    2008-01-01

    Objective: To study the operation of chorionic villus sampling (CVS) guided by color Doppler ultrasound (CDU) via abdomen puncture during early pregnancy and investigate the advertences during the operation. Methods: CVS guided by CDU probe via abdomen puncture were operated on 28 pregnant women who had the indications of antenatal diagnosis. CDU was used to observe the implantation position of the fo1iaceous villis and help setting mark of the puncture point and puncture range on body surface before operation. The needle was punctured under real-time ultrasound guidance and villis were aspirated during the operation: The choice of the right time of puncture and the operation skills were emphasized in the study. Results: The CVS puncture approach should be set through CDU ob servation, which attend to avoid the surrounding blood vessels, intestinal canal and surrounding important organs. The puncture point should be chosen in a point where lobif0rmed villis distributed wider and with a larger scope. The operations were performed from 10 to13 weeks of pregnancy, with an average of 11 weeks. Among these 28 cases, 9.6 were successfully drawn materials in one time, 1 in twice and l failure, with the total ratio of achievement was 96.4%. For all the cases, fetal heart pulsating could be seen by real-time CDU observation fight after the operation, and no larger hematoma echo in the placental site occurred. Ultrasound reexamined one week after the operation, fetal heart pulsation could be found in all cases, and no abortion cases occurred after regular follow-up in 25 continued pregnant patients. Conclusion: Abdominal CVS puncture guided by CDU probe is conveniently operated, safe and available in clinic. It is an important method for antenatal diagnosis during early pregnancy. The puncture localization, skills and the time are the key points for the success in obtaining the materials. (authors)

  5. Comparison of Ultrasound-Guided and Fluoroscopy-Assisted Antegrade Common Femoral Artery Puncture Techniques

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    Slattery, Michael M.; Goh, Gerard S.; Power, Sarah; Given, Mark F.; McGrath, Frank P.; Lee, Michael J., E-mail: mlee@rcsi.ie [Beaumont Hospital, Department of Radiology (Ireland)

    2015-06-15

    PurposeTo prospectively compare the procedural time and complication rates of ultrasound-guided and fluoroscopy-assisted antegrade common femoral artery (CFA) puncture techniques.Materials and MethodsHundred consecutive patients, undergoing a vascular procedure for which an antegrade approach was deemed necessary/desirable, were randomly assigned to undergo either ultrasound-guided or fluoroscopy-assisted CFA puncture. Time taken from administration of local anaesthetic to vascular sheath insertion in the superficial femoral artery (SFA), patients’ age, body mass index (BMI), fluoroscopy radiation dose, haemostasis method and immediate complications were recorded. Mean and median values were calculated and statistically analysed with unpaired t tests.ResultsSixty-nine male and 31 female patients underwent antegrade puncture (mean age 66.7 years). The mean BMI was 25.7 for the ultrasound-guided (n = 53) and 25.3 for the fluoroscopy-assisted (n = 47) groups. The mean time taken for the ultrasound-guided puncture was 7 min 46 s and for the fluoroscopy-assisted technique was 9 min 41 s (p = 0.021). Mean fluoroscopy dose area product in the fluoroscopy group was 199 cGy cm{sup 2}. Complications included two groin haematomas in the ultrasound-guided group and two retroperitoneal haematomas and one direct SFA puncture in the fluoroscopy-assisted group.ConclusionUltrasound-guided technique is faster and safer for antegrade CFA puncture when compared to the fluoroscopic-assisted technique alone.

  6. The clinical value of trans-vaginal ultrasound-guided puncture in the treatment of pelvic abscess

    International Nuclear Information System (INIS)

    Wang Ping; Gong Wei

    2008-01-01

    Objective: To investigate the clinical value of trans-vaginal ultrasound-guided (TVS) puncture in the treatment of pelvic abscess. Methods 30 cases with pelvic abscess were treated by transvaginal ultrasound-guided puncture. The long-dated effects were followed-up. Results: 29 cases were cured by TVS puncture. Operation was performed in 1 patient because of invalid effect. The cure rate was 97%. Conclusion: Ultrasound-guided puncture is a safe and convenient method in the treatment of pelvic abscess. (authors)

  7. Ultrasound-guided lumbar puncture in pediatric patients: technical success and safety.

    Science.gov (United States)

    Pierce, David B; Shivaram, Giri; Koo, Kevin S H; Shaw, Dennis W W; Meyer, Kirby F; Monroe, Eric J

    2018-06-01

    Disadvantages of fluoroscopically guided lumbar puncture include delivery of ionizing radiation and limited resolution of incompletely ossified posterior elements. Ultrasound (US) allows visualization of critical soft tissues and the cerebrospinal fluid (CSF) space without ionizing radiation. To determine the technical success and safety of US-guided lumbar puncture in pediatric patients. A retrospective review identified all patients referred to interventional radiology for lumbar puncture between June 2010 and June 2017. Patients who underwent lumbar puncture with fluoroscopic guidance alone were excluded. For the remaining procedures, technical success and procedural complications were assessed. Two hundred and one image-guided lumbar punctures in 161 patients were included. Eighty patients (43%) had previously failed landmark-based attempts. One hundred ninety-six (97.5%) patients underwent lumbar puncture. Five procedures (2.5%) were not attempted after US assessment, either due to a paucity of CSF or unsafe window for needle placement. Technical success was achieved in 187 (95.4%) of lumbar punctures attempted with US guidance. One hundred seventy-seven (90.3%) were technically successful with US alone (age range: 2 days-15 years, weight range: 1.9-53.1 kg) and an additional 10 (5.1%) were successful with US-guided thecal access and subsequent fluoroscopic confirmation. Three (1.5%) cases were unsuccessful with US guidance but were subsequently successful with fluoroscopic guidance. Of the 80 previously failed landmark-based lumbar punctures, 77 (96.3%) were successful with US guidance alone. There were no reported complications. US guidance is safe and effective for lumbar punctures and has specific advantages over fluoroscopy in pediatric patients.

  8. Ultrasound-guided, minimally invasive, percutaneous needle puncture treatment for tennis elbow.

    Science.gov (United States)

    Zhu, Jiaan; Hu, Bing; Xing, Chunyan; Li, Jia

    2008-10-01

    This report evaluates the efficacy of percutaneous needle puncture under sonographic guidance in treating lateral epicondylitis (tennis-elbow). Ultrasound-guided percutaneous needle puncture was performed on 76 patients who presented with persistent elbow pain. Under a local anesthetic and sonographic guidance, a needle was advanced into the calcification foci and the calcifications were mechanically fragmented. This was followed by a local injection of 25 mg prednisone acetate and 1% lidocaine. If no calcification was found then multiple punctures were performed followed by local injection of 25 mg prednisone acetate and 1% lidocaine. A visual analog scale (VAS) was used to evaluate the degree of pain pre-and posttreatment at 1 week to 24 weeks. Elbow function improvement and degree of self-satisfaction were also evaluated. Of the 76 patients, 55% were rated with excellent treatment outcome, 32% good, 11% average, and 3% poor. From 3 weeks posttreatment, VAS scores were significantly reduced compared with the pretreatment score (Ptennis elbow. Sonography can be used to accurately identify the puncture location and monitor changes.

  9. Ultrasound-guided percutaneous biopsy of digestive tract lesions

    International Nuclear Information System (INIS)

    Gil, S.; Martin, I.; Ballesteros, J. M.; Gomez, C.; Marco, S. F.; Fernandez, P.

    1999-01-01

    To present our experience in ultrasound-guided percutaneous biopsy of lesions located in the digestive tract. We performed ultrasound-guided percutaneous biopsy in 14 patients (10 men and 4 women) ranging in age from 7 to 71 years (mean; 519 years). The lesions were located throughout the digestive tract, from the pyriform sinus to the sigmoid colon. The biopsy was carried out with a 5 MHz convex probe equipped with a device to direct the needle. An 18G automatic needle or a 20G Chiba needle was used to obtain specimens for histological study in every case, and additional samples were collected with a 22G needle for cytological examination in 13 of the patients. The ultrasound images corresponded to pseudokidney in 9 cases and extrinsic masses in 5. The diagnosis was obtained from the histological examination in every case (100%) and from cytology in 6 (44.4%), the latter results were less specific. The only complication corresponded to a case of bilioperitoneum. Ultrasound-guided percutaneous biopsy is a suitable technique for the histological diagnosis of those lesions of the digestive tract that are visible in ultrasound images, but that for some reason can not be examined by endoscopic biopsy. (Author) 20 refs

  10. Pneumoperitoneum Caused by Air Leakage Through the Percutaneous Puncture Tract as a Complication of Rendezvous Technique: A Case Report

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    Chiao-Hsiung Chuang

    2008-11-01

    Full Text Available The rendezvous technique, combining percutaneous and endoscopic procedures, is a safe and effective method to achieve biliary cannulation if an endoscopic approach fails. The two procedures in this technique can be carried out simultaneously or in stages. A simultaneous approach is reported to be associated with fewer complications, and patients undergoing this approach can recover and be discharged more rapidly. Here, we report a complication of pneumoperitoneum in a patient who underwent percutaneous and endoscopic procedures simultaneously for the removal of a common bile duct stone. It was supposed that prolonged air insufflation during endoscopy forced intestinal air to track into the peritoneal cavity through the bile ducts and the puncture tract. Accordingly, a short wait before removing the percutaneous catheter to deflate the intestinal air will be helpful to avoid such a complication.

  11. Value of Ultrasound in Detecting Urinary Tract Anomalies After First Febrile Urinary Tract Infection in Children.

    Science.gov (United States)

    Ghobrial, Emad E; Abdelaziz, Doaa M; Sheba, Maha F; Abdel-Azeem, Yasser S

    2016-05-01

    Background Urinary tract infection (UTI) is an infection that affects part of the urinary tract. Ultrasound is a noninvasive test that can demonstrate the size and shape of kidneys, presence of dilatation of the ureters, and the existence of anatomic abnormalities. The aim of the study is to estimate the value of ultrasound in detecting urinary tract anomalies after first attack of UTI. Methods This study was conducted at the Nephrology Clinic, New Children's Hospital, Faculty of Medicine, Cairo University, from August 2012 to March 2013, and included 30 children who presented with first attack of acute febrile UTI. All patients were subjected to urine analysis, urine culture and sensitivity, serum creatinine, complete blood count, and imaging in the form of renal ultrasound, voiding cysto-urethrography, and renal scan. Results All the patients had fever with a mean of 38.96°C ± 0.44°C and the mean duration of illness was 6.23 ± 5.64 days. Nineteen patients (63.3%) had an ultrasound abnormality. The commonest abnormalities were kidney stones (15.8%). Only 2 patients who had abnormal ultrasound had also vesicoureteric reflux on cystourethrography. Sensitivity of ultrasound was 66.7%, specificity was 37.5%, positive predictive value was 21.1%, negative predictive value was 81.8%, and total accuracy was 43.33%. Conclusion We concluded that ultrasound alone was not of much value in diagnosing and putting a plan of first attack of febrile UTI. It is recommended that combined investigations are the best way to confirm diagnosis of urinary tract anomalies. © The Author(s) 2015.

  12. A New Ultrasound-Guided Puncture Device with Augmented Degrees of Performance Freedom and Ability to Attach to Most Convex Probes

    International Nuclear Information System (INIS)

    Jung, Sung Il; Son, Kyu Ri; Kim, Young Jun; Jeon, Hae Jeong; Park, Sang Woo; Cho, Jeong Yeon; Kim, Seung Hyup

    2008-01-01

    To evaluate the performance of a newly-designed ultrasound (US)-guided puncture device. A newly-designed US-guided puncture device was composed of a guide segment and an attachable segment. The guide segment allowed the needle to be placed in the plane of US view with a maximal degree of freedom, and the attachable segment was designed to attach to most convex US probes. Six operators punctured 144 targets in phantoms using either the new device (n = 72) or free-hand technique (n = 72). The number of required needle passages and the necessary procedure times were compared between the two groups. The number of required needle passages and the necessary procedure time were significantly reduced in five operators when the newly-designed US-guided puncture device was used (p < 0.05). A newly-designed US-guided puncture device, which allows for a maximal degree of freedom in needle placement and can attach to most convex US probes, showed good performance in our study

  13. CT-guided puncture

    International Nuclear Information System (INIS)

    Noeldge, G.; Richter, G.M.; Grenacher, L.; Brado, M.; Kauffmann, G.W.

    1996-01-01

    Sonographic and CT-guided punctures allow the evaluation of suspected lesions in the head, thorax, abdomen, retroperitoneum and skeletal system. The size of the lesion to be evaluated determines the size and the diameter of the puncture needle. The quantity of the material obtained will be defined by the diameter of the needle, i.e. fine-needle biopsy is more adequate for cytological than for histological evaluation. Strict adherence to the indications and contraindications for puncture and painstaking performance of the procedure go a long why towards minimizing the complications. The advantage of CT-guided puncture, in contrast to an ultrasound-guided procedure, is visualization during the puncture procedure free from overshadowing. This permits punctures of lesions located deep in the thorax or the abdomen which are overshadowed by the lungs, by air in the small or large bowel or by bone structures. Moreover, this technique yields much more information about the tissues and organs surrounding the suspected lesion. This information is much more investigator-related with ultrasoundguided puncture. Therefore, the CT-guided puncture has become mandatory in the evaluation of suspected lesions. Moreover, using the same technique, percutaneous drainage of fluids in the interpleural space, abscesses in organs, hematomas, lymphoceles and urinomas; ablation of metastases; and sympathicolysis can be carried out. CT-guided puncture thus changes from a minimally invasive diagnostic procedure to a minimally invasive therapy. (orig./MG) [de

  14. Changes in cerebral haemodynamics in cases of post-lumbar puncture headache: a prospective transcranial Doppler ultrasound study

    International Nuclear Information System (INIS)

    Goebel, H.; Klostermann, H.; Lindner, V.; Schenkl, S.

    1990-01-01

    Transcranial Doppler ultrasonography was used in 45 patients to investigate if changes in haemodynamics in the major arteries of the brain base occurred after lumbar puncture and whether or not patients with or without post-lumbar puncture headache differ with respect to their cerebral haemodynamic parameters before and after lumbar puncture. Before lumbar puncture, patients with post-lumbar puncture headache differed from patients withoput post-lumbar puncture headache in that they showed significantly higher flow velocities and significant asymmetry of flow velocities with lateralization to the right. Patients without post-lumbar puncture headache, on the other hand, showed non-significant flow velocity lateralization to the left. Forty-eight hours after lumbar puncture, both groups demonstrated symmetrical flow velocities. In addition, only patients with post-lumbar puncture headache showed a significant reduction in the flow velocity of the right middle cerebral artery. These findings suggest that it is not only absolute flow velocity that plays a part in the event of headache; the interhemispheric relation of cerebral haemodynamics also plays a fundamental role. 14 refs., 3 figs., 2 tabs

  15. Tracheobronchial puncture-site nodular reaction (TPNR following endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA: Systematic review of case reports

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    Karan Madan

    2017-01-01

    Full Text Available Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA is a minimally invasive and efficacious diagnostic modality for lung cancer staging and evaluation of undiagnosed mediastinal lymphadenopathy. Procedure-related complications are uncommon. We herein report an infrequently described phenomenon following EBUS-TBNA in which two patients developed nodular granulation tissue at the tracheobronchial puncture site. On systematic review, we found description of such phenomena by terminologies such as endobronchial inflammatory polyp, granuloma, and endobronchial mass. The endobronchial inflammatory polyp has been one of the most commonly used terminologies for these; but in most cases, the classical features of an inflammatory polyp are lacking. We propose the term, tracheobronchial puncture-site nodular reaction (TPNR with further classification into granulomatous and nongranulomatous subtypes, for standardized reporting of such reactions following transbronchial needle aspiration procedures. Knowledge of this entity and standardized nomenclature shall help in better characterization of the outcomes and risk factors for the occurrence of these reactions.

  16. Treatment of calculus of upper urinary tract with mini-percutaneous nephrolithotomy under ultrasound guidance

    International Nuclear Information System (INIS)

    Gao Feng; Ye Chunhua; Wang Kanger; Sun Yan

    2009-01-01

    Objective: To evaluate the feasibility and availability of minimally invasive percutaneous nephrolithotomy (MPCNL) under ultrasound guidance for treatment of calculus of upper urinary tract. Methods: The clinical data of 48 cases with calculus of upper urinary tract undergoing MPCNL were reviewed. Results: In 48 cases, cutaneous-nephric passages were successfully constructed by ultrasound guidance, stone-free rate was 90%. The average operation time was 90 minutes, the average hospitalization was 8 days. No major complications were noted. Conclusion: Under ultrasound guidance, MPCNL with holmium laser is a simply, safe and effective method for treating calculus of upper urinary tract. (authors)

  17. Renal tract anomalies in the human fetus : prenatal ultrasound and genetic aspects.

    NARCIS (Netherlands)

    A. Reuss (Annette)

    1989-01-01

    textabstractIn this thesis, attention will be focused on:(i) ultrasonic imaging of normal and abnormal fetal urinary tract anatomy;(ii) the reduced diagnostic potential of ultrasound in oligohydramnios, including methods to circumvent this problem; (iii) the association of ren al tract malforma

  18. The role of the plain radiograph and renal tract ultrasound in the management of children with renal tract calculi

    International Nuclear Information System (INIS)

    Smith, S.L.; Somers, J.M.; Broderick, N.; Halliday, K.

    2000-01-01

    AIMS: The aim of this retrospective study was to assess the relative efficacy of plain abdominal radiographs and detailed renal tract ultrasound (US) examination in the diagnosis and follow-up of children with renal tract calculi. METHODS: The records and imaging studies of 28 paediatric patients who had presented with proven renal tract calculi over a period of 5 years were examined. RESULTS: In 23 (82%) patients, US was the first investigation. All these patients also had plain radiographs. Plain radiographs were the first investigation in five (18%) patients. All renal calculi (100%) visible on plain films were demonstrated on US. Furthermore, detailed US often provided other clinically significant findings that were not apparent on plain films. CONCLUSION: As a result of this study it is recommend that detailed US should be the investigation of choice in children with suspected renal tract calculi. Smith, S.L. (2000)

  19. The role of the plain radiograph and renal tract ultrasound in the management of children with renal tract calculi

    Energy Technology Data Exchange (ETDEWEB)

    Smith, S L; Somers, J M; Broderick, N; Halliday, K

    2000-09-01

    AIMS: The aim of this retrospective study was to assess the relative efficacy of plain abdominal radiographs and detailed renal tract ultrasound (US) examination in the diagnosis and follow-up of children with renal tract calculi. METHODS: The records and imaging studies of 28 paediatric patients who had presented with proven renal tract calculi over a period of 5 years were examined. RESULTS: In 23 (82%) patients, US was the first investigation. All these patients also had plain radiographs. Plain radiographs were the first investigation in five (18%) patients. All renal calculi (100%) visible on plain films were demonstrated on US. Furthermore, detailed US often provided other clinically significant findings that were not apparent on plain films. CONCLUSION: As a result of this study it is recommend that detailed US should be the investigation of choice in children with suspected renal tract calculi. Smith, S.L. (2000)

  20. Ultrasound monitoring of structural urinary tract disease in Schistosoma haematobium infection

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    King Charles H

    2002-01-01

    Full Text Available A major advance in our understanding of the natural history of Schistosoma haematobium-related morbidity has come through the introduction of the portable ultrasound machines for non-invasive examination of the kidneys and bladder. With the use of generators or battery packs to supply power in non-clinical field settings, and with the use of instant photography or miniaturized thermal printers to record permanent images, it is possible to examine scores of individuals in endemic communities every day. Broad-based ultrasound screening has allowed better definition of age-specific disease risks in urinary schistosomiasis. Results indicate that urinary tract abnormalities are common (18% overall prevalence in S. haematobium transmission areas, with a 2-4% risk of either severe bladder abnormality or advanced ureteral obstruction. In longitudinal surveys, ultrasound studies have shown that praziquantel and metrifonate therapy are rapidly effective in reversing urinary tract abnormalities among children. The benefits of treating adults are less well known, but research in progress should help to define this issue. Similarly, the prognosis of specific ultrasound findings needs to be clarified, and the ease of sonographic examination will make such long-term follow-up studies feasible. In summary, the painless, quick, and reproducible ultrasound examination has become an essential tool in the study of urinary schistosomiasis.

  1. 彩超引导肾穿刺在肾积水引流中的应用价值%Color Dopplar Ultrasound Guidance of Hydronephrosis Puncture Drainage the ApplicationValue

    Institute of Scientific and Technical Information of China (English)

    于立江; 王希路; 张颖

    2014-01-01

    Objective:To explore the colour dopplar ultrasound guide hydronephrosis puncture of the drainage application value .Meth-ods:Retrospective analysis of 22 cases in hydronephrosis with colour dopplar ultrasound to exceed guided puncture , placed the tube .Re-sults:22 cases are all drainage success , of hydronephrosis ease and all did not appear serious complications .Conclusion:Colour dopplar ultrasound can reveal organization structure and vascular distribution of hydronephrosis under puncture point , and improve the success rate and security .%目的:探讨彩超引导在肾积水穿刺引流中的应用价值。方法:回顾性分析22例肾积水患者在彩超引导下穿刺,放置引流管。结果:22例患者均引流成功,肾积水缓解均未出现严重并发症。结论:彩超可以明确肾积水穿刺点下的组织结构及血管分布,提高了穿刺成功率和安全性。

  2. Ultrasound-Guided Fine-Needle Aspiration Biopsy of Thyroid Nodules: is it Necessary to Use Local Anesthesia for the Application of One Needle Puncture?

    International Nuclear Information System (INIS)

    Kim, Dong Wook; Rho, Myung Ho; Kim, Ki Nam

    2009-01-01

    This study was designed to evaluate the difference in the degree of patient pain for an ultrasound-guided fine-needle aspiration biopsy (USFNAB) of a thyroid nodule with one needle puncture with and without local anesthesia. A total of 50 patients participated in the study. We examined prospective patients who would undergo US-FNABs of two thyroid nodules (larger than 10 mm maximum diameter), which were located in separate thyroid lobes. For one of these thyroid nodules, US-FNAB was performed following the administration of local anesthesia; for the other nodule, no anesthesia was administered. The application of anesthesia was alternatively administered between patients (either prior to the first US-FNAB procedure or prior to the second procedure). For all patients, the degree of pain during and after each US-guided FNAB was evaluated according to a 4-category verbal rating scale (VRS), an 11-point numeric rating scale (NRS) and a 100-mm visual analogue scale (VAS). The mean maximum diameters of thyroid nodules examined by US-FNAB with the use of local anesthesia and with no local anesthesia were 13.6 mm and 13.0 mm, respectively. There was no significant difference in nodule size (p > 0.05) between two groups. For the VRS, there were 27 patients with a higher pain score when local anesthesia was used and four patients with a higher pain score when no local anesthesia was administered. Nineteen patients had equivalent pain score for both treatments. This finding was statistically significant (p < 0.001). For the NRS, there were 33 patients with a higher pain score when local anesthesia was used and 10 patients with a higher pain score when no local anesthesia was administered. Seven patients had an equivalent pain score for each treatment. This finding was statistically significant (p < 0.001). For the VAS, there were 35 patients with a higher pain score when local anesthesia was used and 11 patients with a higher pain score where no local anesthesia was

  3. The Role of Endoscopic Ultrasound in the Diagnostic Assessment of Subepithelial Lesions of the Upper Gastrointestinal Tract

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    Francisca Dias de Castro

    2016-11-01

    Conclusion: EUS is the method of choice in the study of subepithelial lesions of the upper gastrointestinal tract, in most cases defining a diagnosis. The need for a definitive diagnosis or therapeutic approaches can be based on ultrasound risk features, presented, in the majority, at presentation. This study shows that EUS is capable of safely and accurately define those subepithelial lesions that can be managed only with surveillance ultrasound while waiting for better results with fine needle aspiration.

  4. CT-guided puncture for direct MR-arthrography of the shoulder: Description of possible techniques

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    Hauth E

    2016-07-01

    Full Text Available The following report describes the possible techniques of CT-guided puncture for direct magnetic resonance (MR arthrography of the shoulder. CT-guided puncture can be regarded as an alternative technique to fluoroscopic- or ultrasound-guided puncture for MR-arthrography of the shoulder with high efficiency, low dose and extremely low complication rate.

  5. Renal ultrasound and excretory urography in infants and young children with urinary tract infection

    International Nuclear Information System (INIS)

    Kenda, R.; Kenig, T.; Silc, M.; Zupancic, Z.

    1989-01-01

    The main purpose of the study was to see whether excretory urography (EU) can be safely replaced by ultrasound (US) in children with urinary tract infection (UTI) younger than 6 years. 101 hospitalised children were admitted to the prospective study. They were all diagnosed as having UTI and were treated accordingly. All children had voiding cystography (VCU), EU and US done. US and EU correlated well in 94% of the cases. In all 6 cases with discrepancy between EU and US, the VCU was abnormal. Our results confirm the data from other authors, that VCU and US should be sufficient as an initial work-up on children with UTI, while EU should be done only in the cases with abnormal findings on either one or both of the former investigations. However, it should be kept in mind that some cases of parenchymal involvement or mild subpelvic stenosis can be missed using this protocol. If EU is obtained only in the cases with abnormal US and/or VCU, only 55 children (54%) in our group would have had an EU done. (orig.)

  6. Nonthermal ablation with microbubble-enhanced focused ultrasound close to the optic tract without affecting nerve function.

    Science.gov (United States)

    McDannold, Nathan; Zhang, Yong-Zhi; Power, Chanikarn; Jolesz, Ferenc; Vykhodtseva, Natalia

    2013-11-01

    Tumors at the skull base are challenging for both resection and radiosurgery given the presence of critical adjacent structures, such as cranial nerves, blood vessels, and brainstem. Magnetic resonance imaging-guided thermal ablation via laser or other methods has been evaluated as a minimally invasive alternative to these techniques in the brain. Focused ultrasound (FUS) offers a noninvasive method of thermal ablation; however, skull heating limits currently available technology to ablation at regions distant from the skull bone. Here, the authors evaluated a method that circumvents this problem by combining the FUS exposures with injected microbubble-based ultrasound contrast agent. These microbubbles concentrate the ultrasound-induced effects on the vasculature, enabling an ablation method that does not cause significant heating of the brain or skull. In 29 rats, a 525-kHz FUS transducer was used to ablate tissue structures at the skull base that were centered on or adjacent to the optic tract or chiasm. Low-intensity, low-duty-cycle ultrasound exposures (sonications) were applied for 5 minutes after intravenous injection of an ultrasound contrast agent (Definity, Lantheus Medical Imaging Inc.). Using histological analysis and visual evoked potential (VEP) measurements, the authors determined whether structural or functional damage was induced in the optic tract or chiasm. Overall, while the sonications produced a well-defined lesion in the gray matter targets, the adjacent tract and chiasm had comparatively little or no damage. No significant changes (p > 0.05) were found in the magnitude or latency of the VEP recordings, either immediately after sonication or at later times up to 4 weeks after sonication, and no delayed effects were evident in the histological features of the optic nerve and retina. This technique, which selectively targets the intravascular microbubbles, appears to be a promising method of noninvasively producing sharply demarcated lesions in

  7. Puncture panel optimization

    International Nuclear Information System (INIS)

    Glass, R.E.; Longenbaugh, R.S.

    1986-01-01

    Sandia National Laboratories developed the TRansUranic PACkage Transporter (TRUPACT) to transport defense contact-handled transuranic wastes. The package has been designed to meet the normal and hypothetical accident conditions in 10CFR71 which includes the demonstrated ability to survive a 1-meter drop onto a mild steel pin. The puncture protection is provided by puncture resistant panels. In conjunction with the development of TRUPACT, a series of experiments has been conducted to reduce the weight of the puncture resistant panels. The initial scoping tests resulted in a preliminary design incorporating 30 layers of Kevlar. This design has been shown to meet the regulatory puncture test. To reduce the weight of this panel, subscale tests were conducted on panels utilizing Kevlar yarns with varying mass per unit length (denier) as well as different resins. This paper reviews the testing undertaken in the original panel development and discusses the results obtained from the recent subscale and full-scale optimization tests

  8. CT-Guided Superior Vena Cava Puncture: A Solution to Re-Establishing Access in Haemodialysis-Related Central Venous Occlusion Refractory to Conventional Endovascular Techniques

    Energy Technology Data Exchange (ETDEWEB)

    Khalifa, Mohamed, E-mail: mkhalifa@nhs.net; Patel, Neeral R., E-mail: neeral.patel06@gmail.com; Moser, Steven, E-mail: steven.moser@imperial.nhs.uk [Hammersmith Hospital, Department of Radiology, Imperial College Healthcare NHS Trust (United Kingdom)

    2016-04-15

    PurposeThe purpose of this technical note is to demonstrate the novel use of CT-guided superior vena cava (SVC) puncture and subsequent tunnelled haemodialysis (HD) line placement in end-stage renal failure (ESRF) patients with central venous obstruction refractory to conventional percutaneous venoplasty (PTV) and wire transgression, thereby allowing resumption of HD.MethodsThree successive ESRF patients underwent CT-guided SVC puncture with subsequent tract recanalisation. Ultrasound-guided puncture of the right internal jugular vein was performed, the needle advanced to the patent SVC under CT guidance, with subsequent insertion of a stabilisation guidewire. Following appropriate tract angioplasty, twin-tunnelled HD catheters were inserted and HD resumed.ResultsNo immediate complications were identified. There was resumption of HD in all three patients with a 100 % success rate. One patient’s HD catheter remained in use for 2 years post-procedure, and another remains functional 1 year to the present day. One patient died 2 weeks after the procedure due to pancreatitis-related abdominal sepsis unrelated to the Tesio lines.ConclusionCT-guided SVC puncture and tunnelled HD line insertion in HD-related central venous occlusion (CVO) refractory to conventional recanalisation options can be performed safely, requires no extra equipment and lies within the skill set and resources of most interventional radiology departments involved in the management of HD patients.

  9. Ultrasound

    Science.gov (United States)

    Ultrasound is a useful procedure for monitoring the baby's development in the uterus. Ultrasound uses inaudible sound waves to produce a two-dimensional image of the baby while inside the mother's ...

  10. Puncture Wounds: First Aid

    Science.gov (United States)

    ... Skin problems. In: American Medical Association Handbook of First Aid and Emergency Care. New York, N.Y.: Random House; 2009. Jan. 12, 2018 Original article: http://www.mayoclinic.org/first-aid/first-aid-puncture-wounds/basics/ART-20056665 . Mayo ...

  11. A 3D ultrasound study of sinus tract formation in hidradenitis suppurativa

    DEFF Research Database (Denmark)

    Wortsman, Ximena; Jemec, Gregor

    2013-01-01

    Imaging of hidradenitis suppurativa allows the study of both the lesion morphology and evolution. Hidradenitis lesions of different stages were studied using 3D ultrasound in a cross sectional pilot study. A total of 25 HS patients (18 female/ 7 male, aged 18-46 year-old) and 10 healthy controls (5...... female/5 male, aged 21-49 year-old) were studied. All patients were referred by dermatologists. All examinations were performed on the right axilla and compared with both controls and the skin outside the lesional areas. 3D ultrasound images demonstrated enlargement of the deepest portion of the hair...

  12. Mild pyelectasis diagnosed by prenatal ultrasound is not a predictor of urinary tract morbidity in childhood

    NARCIS (Netherlands)

    Damen-Elias, Henny A. M.; Luijnenburg, Saskia E.; Visser, Gerard H. A.; Stoutenbeek, Philip H.; de Jong, Tom P. V. M.

    2005-01-01

    To determine whether children with prenatally diagnosed mild pyelectasis have more urinary tract morbidity during childhood than children without this finding. Case-control study in children with pyelectasis (anteroposterior diameter of the fetal renal pelvis of 5-10 mm). A validated questionnaire

  13. Ultrasound

    Science.gov (United States)

    ... completed. Young children may need additional preparation. When scheduling an ultrasound for yourself or your child, ask ... of Privacy Practices Notice of Nondiscrimination Manage Cookies Advertising Mayo Clinic is a not-for-profit organization ...

  14. Ultrasound

    Science.gov (United States)

    ... reflect off body structures. A computer receives the waves and uses them to create a picture. Unlike with an x-ray or CT scan, this test does not use ionizing radiation. The test is done in the ultrasound ...

  15. Clinical impact of endoscopic ultrasound-guided fine needle aspiration biopsy in patients with upper gastrointestinal tract malignancies. A prospective study

    DEFF Research Database (Denmark)

    Mortensen, M B; Pless, T; Durup, J

    2001-01-01

    BACKGROUND AND STUDY AIMS: Several studies have evaluated the accuracy of endoscopic ultrasound-guided fine-needle aspiration biopsy (EUS-FNAB) in the upper gastrointestinal tract, but so far no studies have specifically evaluated the clinical impact of EUS-FNAB in upper gastrointestinal tract......% in esophageal, gastric, and pancreatic cancer, respectively. The staging-related clinical impact was similar for all three types of cancer (11-12.5%), whereas the diagnosis-related impact was highest in pancreatic cancer patients (86%). EUS-FNAB was inadequate in 13% and gave false-negative results in 5......%. The overall sensitivity, specificity and accuracy for EUS-FNAB were 80%, 78% and 80%, respectively. No complications related to the biopsy procedure were seen. CONCLUSIONS: If EUS-FNAB was performed only in cases where a positive malignant result would change patient management, then approximately one out...

  16. Ultrasound evaluation of techniques for internal jugular vein puncture in children Avaliação ultra-sonográfica das técnicas de punção da veia jugular interna em crianças

    Directory of Open Access Journals (Sweden)

    Sérgio Tomaz Schettini

    2008-10-01

    Full Text Available PURPOSE: To determine by ultrasound which access and position the child must stay to obtain the best transversal section of the right Internal Jugular Vein (RIJV allowing a safer puncture. METHODS: Three possible accesses to the RIJV, anterior, lateral and posterior, from 57 healthy children, were analyzed through ultrasound images in a sequence of positions of the head, in supine position, with or without a roll under the scapula: head centered in neutral position with and without a roll (NPP and NP; contra lateral rotation with and without a roll (CLRP and CLR, neutral position and the patient raised in 30° in Trendelenburg position (TDG. To analyze the results it was applied one statistic method, with variation analysis to the same individuals. Basic Procedures: Ultrasound evaluation in each one of the proposed positions. RESULTS: The statistical analysis of the results observed that the lateral puncture with the patient in the neutral position, in Trendelemburg without a roll, offers a bigger area in comparison to all the other options of puncture and positioning of the patient (pOBJETIVO: Determinar pelo ultra-som qual o melhor acesso e posicionamento da criança com o intuito de se obter a melhor secção transversal da veia jugular interna direita (VJID, permitindo uma punção com maior segurança. MÉTODOS: Três possíveis acessos a VJID, anterior, lateral e posterior foram analisados pela ultrassonografia em uma sequência de diferentes posições da cabeça, estando o paciente em posição supina com ou sem um coxim sob a escápula; cabeça na posição neutra; (NPP E NP; rotação lateral da cabeça (CLRP e CLR, posição neutra com o paciente em posição de Trendlemburg a 30(0 (TDG. Para analisar os resultados foi aplicado um método estatístico com análise variada sobre os mesmos indivíduos. Procedimentos básicos: Avaliação ultrassonográfica em cada uma das posições propostas. RESULTADOS: Pela análise estatística dos

  17. Transfundal puncture of a large ovarian cyst with hysteroscopic and ultrasonographic guidance

    Directory of Open Access Journals (Sweden)

    Zolnierczyk P

    2015-05-01

    Full Text Available Piotr Zolnierczyk, Krzysztof Cendrowski, Wlodzimierz Sawicki Department of Obstetrics, Gynecology and Oncology, 2nd Faculty of Medicine, Medical University of Warsaw, Warsaw, Poland Abstract: This paper describes the case of an 83-year-old patient with hypertension, diabetes, obesity (body mass index – 38, congestive heart failure, and history of cardiac surgery, who was referred for a diagnostic–therapeutic decompression of a large, symptomatic ovarian cyst. Due to anatomical conditions, the only safe way was a transfundal puncture under mini-hysteroscopic and ultrasound guidance. A puncture with aspiration of 300 mL of serous fluid from the cyst was performed without technical problems and complications. Cytology showed no cancer cells in the examined liquid. Relief from pain and compression discomfort was achieved in the patient. This case shows the possibility of combining ultrasound and minimally invasive diagnostic methods like hysteroscopy in selected clinical situations. Keywords: ovarian cyst puncture, hysteroscopy, ultrasound guided puncture, transfundal cyst puncture, vaginoscopy 

  18. The outcome of antenatal ultrasound diagnosed anomalies of the kidney and urinary tract in a large Danish birth cohort

    DEFF Research Database (Denmark)

    Andrés-Jensen, Liv; Jørgensen, Finn Stener; Thorup, Jorgen

    2016-01-01

    cases. The greater the prenatal and postnatal APD, the higher risk of febrile urinary tract infection (fUTI) and surgical intervention, and lower probability of resolution. 25% of the identified patients had fUTI and/or surgery. CONCLUSIONS: We recommend threshold values of APD at least 10 mm...

  19. CT guided percutaneous renal cysts puncture with ethanol therapy

    International Nuclear Information System (INIS)

    Zhang Xuezhe; Lu Yan; Wang Wu; Huang Zhengguo; Ren An

    2002-01-01

    Objective: To analyse our clinical experience with CT guided percutaneous renal cysts puncture and ethanol therapy. Methods: Five hundred and ten renal cysts in 445 patients were undergone CT guided percutaneous renal cysts puncture and ethanol therapy. Among the 445 cases, 385 cases had solitary renal cyst, 53 multiple renal cysts, and 7 polycystic kidneys. The renal cysts varied in size from 1.9 to 13.5 cm in diameter. The amount of aspirated fluid varied from 3 to 780 ml. A 18-21 gauge aspiration needles were used for all patients. A 25.0% cyst volume replacement with 99.7% ethanol was approved to be appropriate. Results: 427 renal cysts in 396 patients were followed up by computed tomographic (CT) or ultrasound for less than 3 months to more than one year duration. The curative effective rate and disappearance rate of the renal cystic cavity in solitary renal cysts were 97% and 82%, respectively. In multiple renal cysts, the corresponding values were 95% and 79%. In polycystic kidneys, the curative rate was 67%. The complications such as local abdominal pain (28 cases) and hematuria (four cases) were observed in this series. There were no fatal complications. Conclusions: CT guided percutaneous renal cyst puncture and ethanol therapy is an useful procedure for the treatment of solitary renal cysts and multiple renal cysts

  20. Ultrasound pregnancy

    Science.gov (United States)

    Pregnancy sonogram; Obstetric ultrasonography; Obstetric sonogram; Ultrasound - pregnancy; IUGR - ultrasound; Intrauterine growth - ultrasound; Polyhydramnios - ultrasound; Oligohydramnios - ultrasound; ...

  1. Lateral cervical puncture for cervical myelography

    International Nuclear Information System (INIS)

    Seol, Hae Young; Cha, Sang Hoon; Kim, Yoon Hwan; Suh, Won Hyuck

    1985-01-01

    Eleven cervical myelograms were performed by lateral cervical puncture using Metrizamide. So, following results were obtained: 1. Site of lateral cervical puncture; Posterior one third of bony cervical canal at C 1-2 level. 2. Advantages as compared with lumbar puncture for cervical myelograms; 1) Small amount of contrast media 2) Excellent image 3) Less position charge 4) Short time 5) Well visualization of superior margin of obstructive lesion in spinal canal 3. Cessation of lateral cervical puncture, when; 1) Pain during injection of contrast media 2) Localized collection of contrast media

  2. Lateral cervical puncture for cervical myelography

    Energy Technology Data Exchange (ETDEWEB)

    Seol, Hae Young; Cha, Sang Hoon; Kim, Yoon Hwan; Suh, Won Hyuck [Korea University College of Medicine, Seoul (Korea, Republic of)

    1985-12-15

    Eleven cervical myelograms were performed by lateral cervical puncture using Metrizamide. So, following results were obtained: 1. Site of lateral cervical puncture; Posterior one third of bony cervical canal at C 1-2 level. 2. Advantages as compared with lumbar puncture for cervical myelograms; 1) Small amount of contrast media 2) Excellent image 3) Less position charge 4) Short time 5) Well visualization of superior margin of obstructive lesion in spinal canal 3. Cessation of lateral cervical puncture, when; 1) Pain during injection of contrast media 2) Localized collection of contrast media.

  3. Evaluation of the upper urinary tract using transureteric ultrasound - a review of the technique and typical imaging appearances

    International Nuclear Information System (INIS)

    Ingram, M.D.; Sooriakumaran, P.; Palfrey, E.; Montgomery, B.; Massouh, H.

    2008-01-01

    Ureteric strictures and pelviureteric junction obstruction often present a diagnostic conundrum to radiologists, particularly after the first-line investigations have failed to provide a definitive answer. Transureteric ultrasonography (TUU) is a relatively novel technique performed by the radiologist, which uses a miniature endoluminal ultrasound probe to interrogate the ureteric anatomy and peri-ureteric soft tissues. In this review, we discuss how TUU is performed, and the normal imaging appearances of the ureter and surrounding anatomical structures. We also focus on the various pathological processes that can be accurately evaluated or diagnosed using TUU including lymphadenopathy, calculi, ureteric neoplasms, ureteritis, crossing vessels and aneurysms. As TUU is not well established in UK practice as yet, we suggest possible indications for its use in the diagnostic work-up of urological patients and future applications

  4. Changing the needle for lumbar punctures

    DEFF Research Database (Denmark)

    Engedal, Thorbjørn Søndergaard; Ording, H.; Vilholm, O. J.

    2015-01-01

    Objective: Post-dural puncture headache (PDPH) is a common complication of diagnostic lumbar punctures. Both a non-cutting needle design and the use of smaller size needles have been shown to greatly reduce the risk of PDPH. Nevertheless, larger cutting needles are still widely used. This study d...

  5. The zero-wall puncture: a novel angiographic puncture technique with substantial benefits

    International Nuclear Information System (INIS)

    Leswick, D.A.; Szkup, P.; Stoneham, G.W.

    2005-01-01

    Medical education can be busy, exhausting, and stressful, with potential adverse effects on trainees' physical and mental health. Radiology residency is no exception. In addition to increased daily workload and study requirements, Canadian radiology residents are performing a diverse and increasing number of emergent diagnostic examinations after hours. In an attempt to improve resident self-worth and efficiency during angiographic rotations, we investigated the effects of a novel angiographic puncture procedure on various resident lifestyle indexes. Standard techniques for accessing the femoral artery are either the single-wall puncture or double-wall puncture (Seldinger technique). Both of these techniques are widely known and practiced. Following procedure completion, hemostasis must be achieved at the puncture site. This has traditionally required manual compression at the puncture site, which may require 15 to 20 minutes. At our institution the standard policy is that 'whoever makes the puncture, compresses the groin,' also known as 'you broke it, you fix it'. This has prompted our industrious resident complement to develop a novel, previously undescribed, angiographic puncture technique known as the 'zero-wall puncture technique.' Preliminary unpublished results from our institution show that when residents employ the zero-wall puncture technique the attending staff radiologist subsequently both performs the puncture and compresses the groin at the end of the procedure. We investigated the effect of zero-wall puncture on various resident lifestyle indexes. (author)

  6. Value of comprehensive renal ultrasound in children with acute urinary tract infection for assessment of renal involvement: comparison with DMSA scintigraphy and final diagnosis

    Energy Technology Data Exchange (ETDEWEB)

    Brader, Peter; Riccabona, Michael [Medical University Graz, Division of Pediatric Radiology, Department of Radiology, Graz (Austria); Schwarz, Thomas [Medical University Graz, Division of Nuclear Medicine, Department of Radiology, Graz (Austria); Seebacher, Ursula [Medical University Graz, Department of Pediatric Surgery, Graz (Austria); Ring, Ekkehard [Medical University Graz, Department of Pediatrics, Graz (Austria)

    2008-12-15

    The aim of this study was to evaluate the value of comprehensive renal ultrasound (US), i.e., combining greyscale US and amplitude-coded color Doppler sonography (aCDS), for assessment of urinary tract infection (UTI) in infants and children, compared to (1) {sup 99m}Tc DMSA scintigraphy and (2) final diagnosis. Two hundred eighty-seven children with UTI underwent renal comprehensive US and DMSA scintigraphy. The results were compared with regard to their reliability to diagnose renal involvement, using (1) DMSA scintigraphy and (2) final diagnosis as the gold standard. Sixty-seven children clinically had renal involvement. Sensitivity increased from 84.1% using only aCDS to 92.1% for the combined US approach, using DMSA scintigraphy as the reference standard. When correlated with the final diagnosis, sensitivity for DMSA scintigraphy was 92.5%; sensitivity for comprehensive US was 94.0%. Our data demonstrate an increasing sensitivity using the combination of renal greyscale US supplemented by aCDS for differentiation of upper from lower UTI. Sensitivity for DMSA and comprehensive US was similar for both methods compared to the final diagnosis. Comprehensive US should gain a more important role in the imaging algorithm of children with acute UTI, thereby reducing the radiation burden. (orig.)

  7. Value of comprehensive renal ultrasound in children with acute urinary tract infection for assessment of renal involvement: comparison with DMSA scintigraphy and final diagnosis

    International Nuclear Information System (INIS)

    Brader, Peter; Riccabona, Michael; Schwarz, Thomas; Seebacher, Ursula; Ring, Ekkehard

    2008-01-01

    The aim of this study was to evaluate the value of comprehensive renal ultrasound (US), i.e., combining greyscale US and amplitude-coded color Doppler sonography (aCDS), for assessment of urinary tract infection (UTI) in infants and children, compared to (1) 99m Tc DMSA scintigraphy and (2) final diagnosis. Two hundred eighty-seven children with UTI underwent renal comprehensive US and DMSA scintigraphy. The results were compared with regard to their reliability to diagnose renal involvement, using (1) DMSA scintigraphy and (2) final diagnosis as the gold standard. Sixty-seven children clinically had renal involvement. Sensitivity increased from 84.1% using only aCDS to 92.1% for the combined US approach, using DMSA scintigraphy as the reference standard. When correlated with the final diagnosis, sensitivity for DMSA scintigraphy was 92.5%; sensitivity for comprehensive US was 94.0%. Our data demonstrate an increasing sensitivity using the combination of renal greyscale US supplemented by aCDS for differentiation of upper from lower UTI. Sensitivity for DMSA and comprehensive US was similar for both methods compared to the final diagnosis. Comprehensive US should gain a more important role in the imaging algorithm of children with acute UTI, thereby reducing the radiation burden. (orig.)

  8. Avoidance of voiding cystourethrography in infants younger than 3 months with Escherichia coli urinary tract infection and normal renal ultrasound.

    Science.gov (United States)

    Pauchard, Jean-Yves; Chehade, Hassib; Kies, Chafika Zohra; Girardin, Eric; Cachat, Francois; Gehri, Mario

    2017-09-01

    Urinary tract infection (UTI) represents the most common bacterial infection in infants, and its prevalence increases with the presence of high-grade vesicoureteral reflux (VUR). However, voiding cystourethrography (VCUG) is invasive, and its indication in infants urinary E. coli infection. Adding a normal renal US finding decreased this probability to 1%. However, in the presence of non- E. coli bacteria, the probability of high-grade VUR was 26%, and adding an abnormal US finding increased further this probability to 55%. In infants aged 0-3 months with a first febrile UTI, the presence of E. coli and normal renal US findings allow to safely avoid VCUG. Performing VCUG only in infants with UTI secondary to non- E. coli bacteria and/or abnormal US would save many unnecessary invasive procedures, limit radiation exposure, with a very low risk (<1%) of missing a high-grade VUR. © 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.

  9. Validation of a novel cost effective easy to produce and durable in vitro model for kidney-puncture and PNL-Simulation.

    Science.gov (United States)

    Klein, Jan Thorsten; Rassweiler, Jens; Rassweiler-Seyfried, Marie-Claire Charlotte

    2018-03-29

    Nephrolithiasis is one of the most common diseases in urology. According to the EAU Guidelines, a percutaneous nephrolitholapaxy (PNL) is recommended when treating a kidney stone >2 cm. Nowadays PNL is performed even for smaller stones (PNL is the puncture of the planned site. PNL-novice surgeons need to practice this step in a safe environment with an ideal training model. We developed and evaluated a new, easy to produce, in-vitro model for the training of the freehand puncture of the kidney. Porcine kidneys with ureters were embedded in ballistic gel. Food coloring and preservative agent were added. We used the standard imaging modalities of X-ray and ultrasound to validate the training model. An additional new technique, the iPAD guided puncture, was evaluated. Five novices and three experts conducted 12 punctures for each imaging technique. Puncture time, radiation dose, and number of attempts to a successful puncture were measured. Mann-Whitney-U, Kruskal-Wallis, and U-Tests were used for statistical analyses. The sonographic guided puncture is slightly but not significantly faster than the fluoroscopic guided puncture and the iPAD assisted puncture. Similarly, the most experienced surgeon's time for a successful puncture was slightly less than that of the residents, and the experienced surgeons needed the least attempts to perform a successful puncture. In terms of radiation exposure, the residents had a significant reduction of radiation exposure compared to the experienced surgeons. The newly developed ballistic gel kidney-puncture model is a good training tool for a variety of kidney puncture techniques, with good content, construct, and face validity.

  10. Transfundal puncture of a large ovarian cyst with hysteroscopic and ultrasonographic guidance.

    Science.gov (United States)

    Zolnierczyk, Piotr; Cendrowski, Krzysztof; Sawicki, Wlodzimierz

    2015-01-01

    This paper describes the case of an 83-year-old patient with hypertension, diabetes, obesity (body mass index - 38), congestive heart failure, and history of cardiac surgery, who was referred for a diagnostic-therapeutic decompression of a large, symptomatic ovarian cyst. Due to anatomical conditions, the only safe way was a transfundal puncture under mini-hysteroscopic and ultrasound guidance. A puncture with aspiration of 300 mL of serous fluid from the cyst was performed without technical problems and complications. Cytology showed no cancer cells in the examined liquid. Relief from pain and compression discomfort was achieved in the patient. This case shows the possibility of combining ultrasound and minimally invasive diagnostic methods like hysteroscopy in selected clinical situations.

  11. Unilateral transpedicular percutaneous vertebroplasty using puncture simulation

    International Nuclear Information System (INIS)

    Kobayashi, Ken; Takizawa, Kenji; Koyama, Masamichi; Yoshimatsu, Misako; Sakaino, Shinjiro; Nakajima, Yasuo

    2006-01-01

    The aim of this study was to improve the accuracy of puncture to the median vertebral body using the unilateral transpedicular approach on percutaneous vertebroplasty (PVP). We have developed and evaluated a simple puncture simulation method based on the puncture angle determined by preoperative computed tomography (CT). Two groups were evaluated. The first (group A) comprised 23 patients (34 vertebral bodies) who had undergone PYP without preoperative puncture simulation before May 2004, and the second group (group B) comprised 24 patients (39 vertebral bodies) who had undergone preoperative puncture simulation and PVP after May 2004. CT in the prone position was performed, and the puncture angle on CT (PAC) via the vertebral arch pedicle targeting the anterior one-third median site of the vertebral body was determined. Puncture was performed by targeting the isocenter established on a fluoroscopic monitor based on the PAC. Determinations were made of the success rate (SR) of the median puncture of the vertebral body, the effect of treatment using the visual analogue score, and the overall procedural time between groups A and B. The SR was 56% (19/34 vertebral bodies) in group A, and 97% (37/38 vertebral bodies), including only one vertebral body in which it was difficult to perform the unilateral approach on CT images, in group B, with the difference being significant by Student's t-test (P<0.001). Among patients with available follow-up data, the unipedicular and bipedicular approaches achieved adequate pain relief with mean decreases in pain severity of 5.1±2.6 and 5.9±2.8 respectively. No significant differences in the treatment effect between the two groups was observed (P=0.811). The overall procedure time per puncture was shorten for the simulation group (36.0 min) than for group A (73.1 min), as shown by regression analysis. The preoperative PAC determination for PVP under fluoroscopy increased the completion rate of PVP by the unilateral transpedicular

  12. Aerosol can puncture device operational test plan

    International Nuclear Information System (INIS)

    Leist, K.J.

    1994-01-01

    Puncturing of aerosol cans is performed in the Waste Receiving and Processing Facility Module 1 (WRAP 1) process as a requirement of the waste disposal acceptance criteria for both transuranic (TRU) waste and low-level waste (LLW). These cans have contained such things as paints, lubricating oils, paint removers, insecticides, and cleaning supplies which were used in radioactive facilities. Due to Westinghouse Hanford Company (WHC) Fire Protection concerns of the baseline system's fire/explosion proof characteristics, a study was undertaken to compare the baseline system's design to commercially available puncturing devices. While the study found no areas which might indicate a risk of fire or explosion, WHC Fire Protection determined that the puncturing system must have a demonstrated record of safe operation. This could be obtained either by testing the baseline design by an independent laboratory, or by substituting a commercially available device. As a result of these efforts, the commercially available Aerosolv can puncturing device was chosen to replace the baseline design. Two concerns were raised with the system. Premature blinding of the coalescing/carbon filter, due to its proximity to the puncture and draining operation; and overpressurization of the collection bottle due to its small volume and by blinding of the filter assembly. As a result of these concerns, testing was deemed necessary. The objective of this report is to outline test procedures for the Aerosolv

  13. Optimizing Residents' Performance of Lumbar Puncture

    DEFF Research Database (Denmark)

    Henriksen, Mikael Johannes Vuokko; Wienecke, Troels; Thagesen, Helle

    2018-01-01

    Background: Lumbar puncture is often associated with uncertainty and limited experience on the part of residents; therefore, preparatory interventions can be essential. There is growing interest in the potential benefit of videos over written text. However, little attention has been given...... to whether the design of the videos impacts on subsequent performance. Objective: To investigate the effect of different preparatory interventions on learner performance and self-confidence regarding lumbar puncture (LP). Design: Randomized controlled trial in which participants were randomly assigned to one...... of three interventions as preparation for performing lumbar puncture: 1) goal- and learner-centered video (GLV) presenting procedure-specific process goals and learner-centered information; 2) traditional video (TV) providing expert-driven content, but no process goals; and 3) written text (WT...

  14. Higher-dimensional puncture initial data

    International Nuclear Information System (INIS)

    Zilhao, Miguel; Ansorg, Marcus; Cardoso, Vitor; Gualtieri, Leonardo; Herdeiro, Carlos; Sperhake, Ulrich; Witek, Helvi

    2011-01-01

    We calculate puncture initial data, corresponding to single and binary black holes with linear momenta, which solve the constraint equations of D-dimensional vacuum gravity. The data are generated by a modification of the pseudospectral code presented in [M. Ansorg, B. Bruegmann, and W. Tichy, Phys. Rev. D 70, 064011 (2004).] and made available as the TwoPunctures thorn inside the Cactus computational toolkit. As examples, we exhibit convergence plots, the violation of the Hamiltonian constraint as well as the initial data for D=4,5,6,7. These initial data are the starting point to perform high-energy collisions of black holes in D dimensions.

  15. Use of a Collagen-Based Device for Closure of Low Brachial Artery Punctures

    International Nuclear Information System (INIS)

    Belenky, A.; Aranovich, D.; Greif, F.; Bachar, G.; Bartal, G.; Atar, E.

    2007-01-01

    Purpose. To report our experience with the Angioseal vascular closure device for hemostasis of distal brachial artery puncture. Methods. Between September 2003 and August 2005, 64 Angioseal vascular closure devices were inserted in 64 patients (40 men, 24 women; mean age 65 years) immediately after diagnostic or therapeutic arterial angiographies performed through a 5 Fr to 7 Fr sheath via the distal brachial artery. Ultrasound examination of the brachial artery preceded the angiography in all cases and only arteries wider than 4 mm were closed by the Angioseal. In cases of a sonographically evident thin subcutaneous space of the cubital fossa, tissue tumescence, using 1% Lidocaine, was performed prior to the arterial closure. Results. The deployment success rate was 100%. No major complications were encountered; only 2 patients developed puncture site hematoma, and these were followed conservatively. Conclusions. Closure of low brachial artery punctures with the Angioseal is simple and safe. No additional manual compression is required. We recommend its use after brachial artery access interventions, through appropriately wide arteries, to improve early patient ambulation and potentially reduce possible puncture site complications

  16. Uso do ultrassom para determinação do nível de punção lombar em gestantes Uso del ultrasonido para determinación del nivel de punción lumbar en embarazadas Use of the ultrasound to determine the level of lumbar puncture in pregnant women

    Directory of Open Access Journals (Sweden)

    Giovani de Figueiredo Locks

    2010-02-01

    referencia anatómica puede ser inexacta en una gran proporción de pacientes. Este estudio quiso determinar si existe alguna diferencia en la determinación del espacio vertebral L3-L4 por el examen físico cuando se le comparó al ultrasonido en embarazadas obesas y no obesas. MÉTODO: Se estudiaron pacientes adultas sometidas a la cesárea electiva bajo raquianestesia. Las pacientes se analizaron en dos grupos: obesas y no obesas. Con la paciente en la posición sentada, se determinó a través del examen físico, el espacio vertebral L3-L4. Enseguida se realizó el ultrasonido de la región lumbar. Se identificó el hueso sacro y el transductor fue colocado en dirección craneal para identificar los procesos espinosos de las vértebras lumbares. Quedó registrado el nivel vertebral que había sido estimado clínicamente como L3-L4. RESULTADOS: Se incluyeron 90 pacientes, siendo 43 no obesas y 47 obesas. En todas las pacientes se pudieron determinar los espacios vertebrales lumbares a través del ultrasonido. Los espacios vertebrales identificados como L3-L4 en el examen físico, correspondieron a los estimados como L3-L4 por el ultrasonido en un 53 y un 49% en los grupos de no obesas y obesas, respectivamente. No hubo diferencia significativa entre los grupos. CONCLUSIONES: El porcentaje de acierto en la identificación del espacio vertebral L3-L4 en embarazadas obesas y no obesas es bajo. El ultrasonido de la columna vertebral puede reducir el error de determinación del espacio vertebral L3-L4 en embarazadas obesas y no obesas.BACKGROUND AND OBJECTIVES: An imaginary line connecting both iliac crests is used to determine the vertebral level for lumbar puncture. This line crosses the spine at the level of L4 or the L4-L5 space. This anatomical reference can be inaccurate in a large proportion of patients. The objective of the present study was to determine whether the identification of the L3-L4 space by the physical exam differs from that of the ultrasound in obese and

  17. gastrointestinal tract

    Directory of Open Access Journals (Sweden)

    Rolandas Vaicekauskas

    2016-07-01

    Full Text Available Introduction : Accurate diagnosis of subepithelial lesions (SELs in the gastrointestinal tract depends on a variety of methods: endoscopy, endoscopic ultrasound and different types of biopsy. Making an error-free diagnosis is vital for the subsequent application of an appropriate treatment. Aim: To evaluate the efficacy of deep biopsy via the endoscopic submucosal dissection (ESD technique for SELs in the upper gastrointestinal tract. Material and methods: It was a case series study. Deep biopsy via the ESD technique was completed in 38 patients between November 2012 and October 2014. Thirty-eight SELs in the upper gastrointestinal tract of varying size (very small ≤ 1 cm, small 1–2 cm and large ≥ 2 cm by means of the ESD technique after an incision with an electrosurgical knife of the overlying layers and revealing a small part of the lesion were biopsied under direct endoscopic view. Results: Deep biopsy via the ESD technique was diagnostic in 28 of 38 patients (73.3%; 95% CI: 59.7–89.7%. The diagnostic yield for SELs with a clear endophytic shape increased to 91.3%. An evident endophytic appearance of a subepithelial lesion, the mean number of biopsied samples (6.65 ±1.36 and the total size in length of all samples per case (19.88 ±8.07 mm were the main criteria influencing the positiveness of deep biopsy in the diagnostic group compared to the nondiagnostic one (p = 0.001; p = 0.025; p = 0.008. Conclusions : Deep biopsy via the ESD technique is an effective and safe method for the diagnosis of SELs especially with a clear endophytic appearance in a large number of biopsied samples.

  18. Ultrasound -- Pelvis

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    Full Text Available ... Ultrasound - Abdomen Obstetric Ultrasound Ultrasound - Prostate Kidney and Bladder Stones Abnormal Vaginal Bleeding Ovarian Cancer Images related to Ultrasound - Pelvis Sponsored by Please ...

  19. Ultrasound -- Pelvis

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    Full Text Available ... Children's (Pediatric) Ultrasound - Abdomen Obstetric Ultrasound Ultrasound - Prostate Kidney and Bladder Stones Abnormal Vaginal Bleeding Ovarian Cancer Images related to Ultrasound - Pelvis Sponsored by Please ...

  20. Ultrasound -- Pelvis

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    Full Text Available ... specific content. Related Articles and Media Sonohysterography Ultrasound - Abdomen Children's (Pediatric) Ultrasound - Abdomen Obstetric Ultrasound Ultrasound - Prostate Kidney and ...

  1. Laser puncture therapy of nervous system disorders

    Energy Technology Data Exchange (ETDEWEB)

    Anishchenko, G.; Kochetkov, V.

    1984-08-29

    The authors discuss experience with treatment of nervous system disorders by means of laser-puncture therapy. Commenting on the background of the selection of this type of treatment, they explain that once researchers determined the biological action of laser light on specific nerve receptors of the skin, development of laser apparatus capable of concentrating the beam in the millimeter band was undertaken. The devices that are being used for laser-puncture are said to operate in the red helium-neon band of light. The authors identify beam parameters that have been selected for different groups of acupuncture points of the skin, and the courses of treatment (in seconds of radiation) and their time intervals. They go on to discuss the results of treatment of over 800 patients categorized in a group with disorders of the peripheral nervous system and a second group with disorders of the central nervous system.

  2. The value of high frequency ultrasound combined with X in diagnosis of digestive tract malformation in children%高频超声联合X片在儿童消化道畸形中的诊断价值

    Institute of Scientific and Technical Information of China (English)

    陈志勇; 周小渔; 何静波; 金科

    2014-01-01

    Objetive To investigate the value of high frequency ultrasound combined with X-ray exami-nation in the diagnosis of digestive tract malformation in children. Methods 60 cases of gastrointestinal mal-formation operation confirmed by ultrasonography and X-ray images of the retrospective analysis. Results 1 9 cases of application of ultrasound alone diagnosis of 60 cases,including 8 cases of hypertrophic pyloric obstruc-tion,intestinal malrotation in 5 cases,6 cases were intestinal duplication,1 1 cases of application of X-ray sin-gle diagnosis,including 4 cases of esophageal atresia,atresia of anus with rectal perineal fistula in 7 cases,the other 30 cases of application of high frequency ultrasound combined with X the diagnosis,the pyloric edema with gastroesophageal reflux in 4 cases,7 cases of annular pancreas,6 cases of congenital megacolon. Con-clusion High frequency ultrasound combined with X-ray can improve children's digestive tract malformation di-agnosis rate,the two complement each other.%目的:探讨高频超声联合X线检查在儿童消化道畸形中的诊断价值。方法对60例经手术证实的消化道畸形患儿进行超声及X线片图像的回顾性分析。结果60例患儿中,单纯经超声诊断为肥厚性幽门梗阻8例,肠旋转不良5例,肠重复畸形6例。单纯经X线检查诊断为食管闭锁4例,肛门闭锁伴直肠会阴瘘7例;经高频超声联合X线检查诊断为消化道重复畸形13例,幽门水肿伴胃食管反流4例,环形胰腺7例,先天性巨结肠6例。结论高频超声联合X线检查可提高儿童消化道畸形的诊断率,二者互为补充。

  3. The reasons for delay lumbar puncture

    Directory of Open Access Journals (Sweden)

    MH. Lotfi

    2017-04-01

    Full Text Available Early diagnosis of meningitis and encephalitis and prompt initiation of appropriate therapy is vital and any delay will lead to high mortality and serious and permanent morbidity. The main purpose of this study was to evaluate the management of 220 patients with suspected central nervous system (CNS infections (meningitis and encephalitis to determine the percentage of patients’ suspected CNS infection undergo lumbar puncture in acceptable time (in accordance with conventional algorithms. In this descriptive study, patients with suspected CNS infections admitted to Bu-Ali and Qods hospitals, in the period July 2013 to December 2015 were studied. Information of 220 patients was collected. Continuous variables were summarized as means ± standard deviation and categorical variables as frequencies and percentages. Lumbar puncture (LP in patients was delayed in 200 cases (91%. Most common causes of delay in performing LP were prolongation of the process of determining patient needs to puncture, satisfying patients, CT scan delay and the delay in allowing LP by neurologist. In this study, delaying LP rate was higher than other studies. It seems certain pattern in assistants’ visits for counseling. CT requests and neurologic consultation before LP performed for all adult patients.

  4. Ultrasound diagnosis and evaluation of fetal tumors.

    Science.gov (United States)

    Kurjak, A; Zalud, I; Jurković, D; Alfirević, Z; Tomić, K

    1989-01-01

    Fetal tumors represent a rare and heterogeneous group of abnormalities. A significant proportion of them can now be diagnosed by using modern high resolution ultrasonic equipment. During 15 years there were 57 fetal tumours detected prenatally. Hygroma colli is the most frequent fetal tumor. It should be emphasized that cystic hygroma generally carries poor prognosis, and after an early diagnosis, termination of pregnancy is most logical approach. Contrary to the general opinion our own experience showed that there are cases in which prognosis could be much better as illustrated with our 4 cases. All of the treated fetuses, after surgical resection, had normal development and are now on the age of 5, 4, 3 and 2 years of life. An ovarian cyst can be suspected if a fluid-filled structure is visualized next to a fetal kidney and female external genitalia are recognizable. The ultrasound finding suggestive of an ovarian cyst is that of a pelvic cystic or complex mass in a female fetus with normal kidneys and urinary bladder and a normal gastrointestinal tract. In most cases, the normal course of fetal ovarian cyst is a spontaneous intrauterine or postnatal involution. Prenatal diagnosis improves neonatal outcome by allowing an appropriate choice of the optimal time, mode and place of delivery in order to avoid accidental and unexpected intrapartum and postnatal complications. The management of a fetus affected by an ovarian cyst depends on the size and on the echo-pattern of the cyst. It remains unclear whether in utero puncture of the cyst and evacuation of its content should be justified in cases of particularly large ovarian cyst. In our opinion intrauterine procedure can be attempted in the presence of large cyst fulfilling the fetal abdomen. We have treated actively two cases of large ovarian cysts by ultrasonically guided puncture before delivery and both fetuses underwent surgery later without complications. If properly performed puncture of the cyst seems to be

  5. Prostate Ultrasound

    Medline Plus

    Full Text Available ... Physician Resources Professions Site Index A-Z Ultrasound - Prostate Ultrasound of the prostate uses sound waves to ... Ultrasound Imaging? What is Ultrasound Imaging of the Prostate? Ultrasound is safe and painless, and produces pictures ...

  6. The Use of ExoSeal Vascular Closure Device for Direct Antegrade Superficial Femoral Artery Puncture Site Hemostasis

    Energy Technology Data Exchange (ETDEWEB)

    Rimon, Uri, E-mail: rimonu@sheba.health.gov.il; Khaitovich, Boris, E-mail: borislena@012.net.il [Tel-Aviv University, Diagnostic and Interventional Imaging Department, Chaim Sheba Medical Center, Tel-Hashomer, Affiliated to the Sackler School of Medicine (Israel); Yakubovich, Dmitry, E-mail: Dmitry.Yakubovitch@sheba.health.gov.il [Tel-Aviv University, Vascular Surgery Department, Chaim Sheba Medical Center, Tel-Hashomer, Affiliated to the Sackler School of Medicine (Israel); Bensaid, Paul, E-mail: paulbensaid@hotmail.com; Golan, Gil, E-mail: gilgolan201@gmail.com [Tel-Aviv University, Diagnostic and Interventional Imaging Department, Chaim Sheba Medical Center, Tel-Hashomer, Affiliated to the Sackler School of Medicine (Israel); Silverberg, Daniel, E-mail: Daniel.Silverberg@sheba.health.gov.il [Tel-Aviv University, Vascular Surgery Department, Chaim Sheba Medical Center, Tel-Hashomer, Affiliated to the Sackler School of Medicine (Israel)

    2015-06-15

    PurposeThis study was designed to assess the efficacy and safety of the ExoSeal vascular closure device (VCD) to achieve hemostasis in antegrade access of the superficial femoral artery (SFA).MethodsWe retrospectively reviewed the outcome of ExoSeal VCD used for hemostasis in 110 accesses to the SFA in 93 patients between July 2011 and July 2013. All patients had patent proximal SFA based on computer tomography angiography or ultrasound duplex. Arterial calcifications at puncture site were graded using fluoroscopy. The SFA was accessed in an antegrade fashion with ultrasound or fluoroscopic guidance. In all patients, 5–7F vascular sheaths were used. The ExoSeal VCD was applied to achieve hemostasis at the end of the procedure. All patients were clinically examined and had ultrasound duplex exam for any puncture site complications during the 24 h postprocedure.ResultsIn all procedures, the ExoSeal was applied successfully. We did not encounter any device-related technical failure. There were four major complications in four patients (3.6 %): three pseudoaneurysms, which were treated with direct thrombin injection, and one hematoma, which necessitated transfusion of two blood units. All patients with complications were treated with anticoagulation preprocedure or received thrombolytic therapy.ConclusionsThe ExoSeal VCD can be safely used for antegrade puncture of the SFA, with a high procedural success rate (100 %) and a low rate of access site complications (3.6 %)

  7. Venous catheterization with ultrasound navigation

    International Nuclear Information System (INIS)

    Kasatkin, A. A.; Nigmatullina, A. R.; Urakov, A. L.

    2015-01-01

    By ultrasound scanning it was determined that respiratory movements made by chest of healthy and sick person are accompanied by respiratory chest rise of internal jugular veins. During the exhalation of an individual diameter of his veins increases and during the breath it decreases down to the complete disappearing if their lumen. Change of the diameter of internal jugular veins in different phases can influence significantly the results of vein puncture and cauterization in patients. The purpose of this research is development of the method increasing the efficiency and safety of cannulation of internal jugular veins by the ultrasound visualization. We suggested the method of catheterization of internal jugular veins by the ultrasound navigation during the execution of which the puncture of venous wall by puncture needle and the following conduction of J-guide is carried out at the moment of patient’s exhalation. This method decreases the risk of complications development during catheterization of internal jugular vein due to exclusion of perforating wound of vein and subjacent tissues and anatomical structures

  8. Venous catheterization with ultrasound navigation

    Energy Technology Data Exchange (ETDEWEB)

    Kasatkin, A. A., E-mail: ant-kasatkin@yandex.ru; Nigmatullina, A. R. [Izhevsk State Medical Academy, Kommunarov street, 281, Izhevsk, Russia, 426034 (Russian Federation); Urakov, A. L., E-mail: ant-kasatkin@yandex.ru [Institute of Mechanics Ural Branch of Russian Academy of Sciences, T.Baramzinoy street 34, Izhevsk, Russia, 426067, Izhevsk (Russian Federation); Izhevsk State Medical Academy, Kommunarov street, 281, Izhevsk, Russia, 426034 (Russian Federation)

    2015-11-17

    By ultrasound scanning it was determined that respiratory movements made by chest of healthy and sick person are accompanied by respiratory chest rise of internal jugular veins. During the exhalation of an individual diameter of his veins increases and during the breath it decreases down to the complete disappearing if their lumen. Change of the diameter of internal jugular veins in different phases can influence significantly the results of vein puncture and cauterization in patients. The purpose of this research is development of the method increasing the efficiency and safety of cannulation of internal jugular veins by the ultrasound visualization. We suggested the method of catheterization of internal jugular veins by the ultrasound navigation during the execution of which the puncture of venous wall by puncture needle and the following conduction of J-guide is carried out at the moment of patient’s exhalation. This method decreases the risk of complications development during catheterization of internal jugular vein due to exclusion of perforating wound of vein and subjacent tissues and anatomical structures.

  9. Prostate Ultrasound

    Medline Plus

    Full Text Available ... through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. Prostate ultrasound, also called transrectal ultrasound, provides ...

  10. Endoscopic ultrasound rendezvous for bile duct access using a transduodenal approach: cumulative experience at a single center. A case series.

    Science.gov (United States)

    Kim, Y S; Gupta, K; Mallery, S; Li, R; Kinney, T; Freeman, M L

    2010-06-01

    Endoscopic ultrasound (EUS)-assisted biliary access is utilized when conventional endoscopic retrograde cholangiopancreatography (ERCP) fails. We report a 10-year experience utilizing a transduodenal EUS rendezvous via a transpapillary route without dilation of the transduodenal tract, followed by immediate ERCP access. Patients included all EUS-guided rendezvous procedures for biliary access that were performed following ERCP failure. EUS-assisted bile duct puncture was performed via a transduodenal approach and a guide wire was advanced through the papilla without any dilation or bougienage of the tract; ERCP was performed immediately afterwards. EUS-assisted biliary rendezvous was attempted in 15 patients (mean age 66 +/- 18.2 years; malignant = 10, benign = 5). Mean diameter of measured bile ducts was 14.3 +/- 5.17 mm (range 4-23 mm). The reasons for initial ERCP failure were tumor infiltration or edema (n = 9), intradiverticular papilla (n = 2), pre-existing duodenal stent (n = 1), and anatomic anomalies (n = 3). Successful EUS-guided bile duct puncture and wire passage were achieved in all 15 patients (100 %), with drainage being successful in 12 / 15 (80 %). Failures occurred in three patients due to inability to traverse the biliary stricture (n = 2) or dissection of a choledochocele with the guide wire (n = 1); all were subsequently drained via percutaneous methods. Stents placed were metallic in eight patients and plastic in four. Complications consisted of moderate pancreatitis after a difficult ERCP attempt in one patient, and bacteremia after percutaneous biliary drainage in another. There were no instances of perforation, extraluminal air or fluid collections. EUS-assisted biliary drainage utilizing a transduodenal rendezvous approach demonstated a high success rate without any complications directly attributable to the EUS access. Advantages over percutaneous biliary and other methods of EUS biliary access include performance under the same

  11. C6 plate puncture testing report.

    Energy Technology Data Exchange (ETDEWEB)

    Vangoethem, Douglas J. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Cordova, Theresa Elena [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Reu, Phillip L. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2013-04-01

    There are numerous scenarios where critical systems could be subject to penetration by projectiles or fixed objects (e.g., collision, natural disaster, act of terrorism, etc.). It is desired to use computational models to examine these scenarios and make risk-informed decisions; however, modeling of material failure is an active area of research, and new models must be validated with experimental data. The purpose of this report is to document the experimental work performed from FY07 through FY08 on the Campaign Six Plate Puncture project. The goal of this project was to acquire experimental data on the puncture and penetration of metal plates for use in model validation. Of particular interest is the PLH failure model also known as the multilinear line segment model. A significant amount of data that will be useful for the verification and validation of computational models of ductile failure were collected during this project were collected and documented herein; however, much more work remains to be performed, collecting additional experimental data that will further the task of model verification.

  12. Puncture resistance of Type B transport systems

    International Nuclear Information System (INIS)

    Rack, H.J.; Cheresh, M.C.

    1980-01-01

    This report describes a recent attempt to develop a test method for use in screening materials and for evaluating the effects of certain parameters, for example section stiffness, on container penetration resistance. In addition, it illustrates the application of this procedure to the selection of a sheet steel for a transuranic waste (TRUPACT) container. The test consists of penetrating a specimen, normally 0.6 m square, with a punch (tup) attached to a falling weight and recording and analyzing the force-time history to determine the energy absorption during the impact event. The test as developed simulates certain aspects of the 10CFR71 drop test in order to provide a means of comparing, for example, the penetrating resistance of various steels, this resistance being defined as the energy required to initiate fracture in the specimen. In summary, this examination suggests that it should be possible to develop a laboratory test to rank and select materials for maximum puncture resistance. Although the initial results appear promising, more effort will be required before this procedure can be routinely applied to examining the various factors which control the puncture resistance of these materials. These results do, nonetheless, show that high-strength, low-alloy steels do offer significant advantages over mild steel for container penetration protection. Indeed, one of these steels, NAX-80, is presently considered as a prime candidate for the TRUPACT container being developed at Sandia National Laboratories

  13. Prostate Ultrasound

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    Full Text Available ... ultrasound or with a rectal examination, an ultrasound-guided biopsy can be performed. This procedure involves advancing ... of the Prostate) Prostate Cancer Ultrasound- and MRI-Guided Prostate Biopsy Images related to Ultrasound - Prostate Sponsored ...

  14. Ultrasound -- Pelvis

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    Full Text Available ... Ultrasound - Pelvis Ultrasound imaging of the pelvis uses sound waves to produce pictures of the structures and ... pictures of the inside of the body using sound waves. Ultrasound imaging, also called ultrasound scanning or ...

  15. Prostate Ultrasound

    Medline Plus

    Full Text Available ... Z Ultrasound - Prostate Ultrasound of the prostate uses sound waves to produce pictures of a man’s prostate ... pictures of the inside of the body using sound waves. Ultrasound imaging, also called ultrasound scanning or ...

  16. Ultrasound -- Pelvis

    Science.gov (United States)

    ... endometrial polyps fibroids cancer, especially in patients with abnormal uterine bleeding Some physicians also use 3-D ultrasound or ... Obstetric Ultrasound Ultrasound - Prostate Kidney and Bladder Stones Abnormal Vaginal Bleeding Ovarian Cancer Images related to Ultrasound - Pelvis Sponsored ...

  17. Challenging the wisdom of puncture at the calyceal fornix in percutaneous nephrolithotripsy: feasibility and safety study with 137 patients operated via a non-calyceal percutaneous track.

    Science.gov (United States)

    Kyriazis, Iason; Kallidonis, Panagiotis; Vasilas, Marinos; Panagopoulos, Vasilios; Kamal, Wissam; Liatsikos, Evangelos

    2017-05-01

    To present our experience with a central, non-calyceal puncture protocol for percutaneous nephrolithotripsy (PCNL) in an attempt to challenge the opinion of worldwide adopted calyceal puncture as the less traumatic site of percutaneous entrance into the collecting system. During 2012, a total of 137 consecutive, unselected patients were subjected to PCNL in our department. Non-calyceal punctures were performed to all cases and followed by subsequent track dilations up to 30 Fr. Perioperative and postoperative data were prospectively collected and analyzed. Mean operative time (from skin puncture to nephrostomy tube placement) was 48 min. Patients with single, multiple and staghorn stones had primary stone-free rates of 89.2, 80.4 and 66.7 % after PCNL, respectively. The overall complication rate was 10.2 %, while bleeding complications were minimal. Only 4 patients (2.9 %) required blood transfusion. Five patients (3.6 %) had Clavien Grade IIIa complications requiring an intervention for their management and none Grade IV or V. Despite the absence of evidence that non-calyceal percutaneous tracts could be a risk factor for complications, the concept of calyceal puncture has been worldwide adopted by PCNL surgeons as the sole safe percutaneous entrance into the collective system. Based on our experience, other pathways than the worldwide recognized rule, calyceal puncture, are possible and probably not as dangerous as has been previously stated.

  18. Ballistic Puncture Self-Healing Polymeric Materials

    Science.gov (United States)

    Gordon, Keith L.; Siochi, Emilie J.; Yost, William T.; Bogert, Phil B.; Howell, Patricia A.; Cramer, K. Elliott; Burke, Eric R.

    2017-01-01

    Space exploration launch costs on the order of $10,000 per pound provide an incentive to seek ways to reduce structural mass while maintaining structural function to assure safety and reliability. Damage-tolerant structural systems provide a route to avoiding weight penalty while enhancing vehicle safety and reliability. Self-healing polymers capable of spontaneous puncture repair show promise to mitigate potentially catastrophic damage from events such as micrometeoroid penetration. Effective self-repair requires these materials to quickly heal following projectile penetration while retaining some structural function during the healing processes. Although there are materials known to possess this capability, they are typically not considered for structural applications. Current efforts use inexpensive experimental methods to inflict damage, after which analytical procedures are identified to verify that function is restored. Two candidate self-healing polymer materials for structural engineering systems are used to test these experimental methods.

  19. Cerebrospinal fluid loss at lumbar puncture for caesarean section ...

    African Journals Online (AJOL)

    Background Post dural puncture headache (PDPH) is an unpleasant complication of spinal anaesthesia. Several studies have attempted explanation of its pathophysiology. A widely held view is that it results from loss of cerebrospinal fluid volume resulting from leak following a hole left in the dura after the puncture.

  20. Retrograde vs. Antegrade Puncture for Infra-Inguinal Angioplasty

    International Nuclear Information System (INIS)

    Nice, C.; Timmons, G.; Bartholemew, P.; Uberoi, R.

    2003-01-01

    This study was done to compare antegrade punctures with a retrograde puncture technique for infrainguinal angioplasty. A group of 100 consecutive patients (71 men, 29 women) were randomized for antegrade puncture or retrograde puncture of the common femoral artery. Following retrograde puncture the guidewire was 'turned' and placed into the superficial femoral artery. The time for gaining access, screening time, radiation dose, patient height, weight and complications were recorded. All patients were reviewed the day after the procedure and within 3 months. Data from 46 patients (34 males and 12 females) in the retrograde group and 44 (28 males and 16 females) in the antegrade group were available for analysis. Mean procedure time,screening time, radiation dose, height and weight were 8.3 minutes(range 3-22), 2.1 minutes (0.3-6.5), 7950 mGy cm -2 (820-71250), 169 cm (149-204) and 79 kg (32-108) for retrograde puncture and 8 min (2-60), 0.7 min (0.0-3.2), 1069 mGycm -2 (0-15400), 169 cm (152-186) and 75 kg (39-125) for antegrade punctures, respectively. An average of 1.2 (1-2) punctures was required for retrograde and 1.75 (1-8) for antegrade. Seven small hematomas occurred with antegrade and three for retrograde puncture.Retrograde puncture is technically easier with a tendency to fewer complications but results in a higher radiation dose. This technique should be used in difficult patients at high risk of haematoma formation

  1. A New Navigation System of Renal Puncture for Endoscopic Combined Intrarenal Surgery: Real-time Virtual Sonography-guided Renal Access.

    Science.gov (United States)

    Hamamoto, Shuzo; Unno, Rei; Taguchi, Kazumi; Ando, Ryosuke; Hamakawa, Takashi; Naiki, Taku; Okada, Shinsuke; Inoue, Takaaki; Okada, Atsushi; Kohri, Kenjiro; Yasui, Takahiro

    2017-11-01

    To evaluate the clinical utility of a new navigation technique for percutaneous renal puncture using real-time virtual sonography (RVS) during endoscopic combined intrarenal surgery. Thirty consecutive patients who underwent endoscopic combined intrarenal surgery for renal calculi, between April 2014 and July 2015, were divided into the RVS-guided puncture (RVS; n = 15) group and the ultrasonography-guided puncture (US; n = 15) group. In the RVS group, renal puncture was repeated until precise piercing of a papilla was achieved under direct endoscopic vision, using the RVS system to synchronize the real-time US image with the preoperative computed tomography image. In the US group, renal puncture was performed under US guidance only. In both groups, 2 urologists worked simultaneously to fragment the renal calculi after inserting the miniature percutaneous tract. The mean sizes of the renal calculi in the RVS and the US group were 33.5 and 30.5 mm, respectively. A lower mean number of puncture attempts until renal access through the calyx was needed for the RVS compared with the US group (1.6 vs 3.4 times, respectively; P = .001). The RVS group had a lower mean postoperative hemoglobin decrease (0.93 vs 1.39 g/dL, respectively; P = .04), but with no between-group differences with regard to operative time, tubeless rate, and stone-free rate. None of the patients in the RVS group experienced postoperative complications of a Clavien score ≥2, with 3 patients experiencing such complications in the US group. RVS-guided renal puncture was effective, with a lower incidence of bleeding-related complications compared with US-guided puncture. Copyright © 2017 Elsevier Inc. All rights reserved.

  2. Maass Cusp Forms on Singly Punctured Two-Torus

    International Nuclear Information System (INIS)

    Siddig, Abubaker Ahmed Mohamed; Shah, Nurisya Mohd; Zainuddin, Hishamuddin

    2009-01-01

    Quantum mechanical systems on punctured surfaces modeled by hyperbolic spaces can play an interesting role in exploring quantum chaos and in studying behaviour of future quantum nano-devices. The case of singly-punctured two-torus, for example, has been well-studied in the literature particularly for its scattering states. However, the bound states on the punctured torus given by Maass cusp forms are lesser known. In this note, we report on the algorithm of numerically computing these functions and we present ten lower-lying eigenvalues for each odd and even Maass cusp forms.

  3. Prehospital Ultrasound

    Directory of Open Access Journals (Sweden)

    Jen-Tang Sun

    2014-06-01

    Full Text Available Ultrasound is a commonly used diagnostic tool in clinical conditions. With recent developments in technology, use of portable ultrasound devices has become feasible in prehospital settings. Many studies also proved the feasibility and accuracy of prehospital ultrasound. In this article, we focus on the use of prehospital ultrasound, with emphasis on trauma and chest ultrasound.

  4. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... a pelvic ultrasound examination. Doppler ultrasound , also called color Doppler ultrasonography, is a special ultrasound technique that ... and processes the sounds and creates graphs or color pictures that represent the flow of blood through ...

  5. Ultrasound -- Pelvis

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    Full Text Available ... Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. There are ... Ultrasound page for more information . Ultrasound examinations can help diagnose symptoms experienced by women such as: pelvic ...

  6. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... three types of pelvic ultrasound: abdominal, vaginal (for women), and rectal (for men). These exams are frequently ... pelvic ultrasound: abdominal ( transabdominal ) vaginal ( transvaginal / endovaginal ) for women rectal ( transrectal ) for men A Doppler ultrasound exam ...

  7. Ultrasound -- Pelvis

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    Full Text Available ... ultrasound images are captured in real-time, they can show the structure and movement of the body's ... Obstetrical Ultrasound page for more information . Ultrasound examinations can help diagnose symptoms experienced by women such as: ...

  8. Punctures for theories of class S{sub Γ}

    Energy Technology Data Exchange (ETDEWEB)

    Heckman, Jonathan J. [Department of Physics, University of North Carolina,Chapel Hill, NC 27599 (United States); Jefferson, Patrick; Rudelius, Tom; Vafa, Cumrun [Jefferson Physical Laboratory, Harvard University,Cambridge, MA 02138 (United States)

    2017-03-31

    With the aim of understanding compactifications of 6D superconformal field theories to four dimensions, we study punctures for theories of class S{sub Γ}. The class S{sub Γ} theories arise from M5-branes probing ℂ{sup 2}/Γ, an ADE singularity. The resulting 4D theories descend from compactification on Riemann surfaces decorated with punctures. We show that for class S{sub Γ} theories, a puncture is specified by singular boundary conditions for fields in the 5D quiver gauge theory obtained from compactification of the 6D theory on a cylinder geometry. We determine general boundary conditions and study in detail solutions with first order poles. This yields a generalization of the Nahm pole data present for 1/2 BPS punctures for theories of class S. Focusing on specific algebraic structures, we show how the standard discussion of nilpotent orbits and its connection to representations of su(2) generalizes in this broader context.

  9. Lumbar puncture in patients using anticoagulants and antiplatelet agents

    Directory of Open Access Journals (Sweden)

    Renan Domingues

    2016-08-01

    Full Text Available ABSTRACT The use of anticoagulants and antiplatelet agents has largely increased. Diagnostic lumbar puncture in patients taking these drugs represents a challenge considering the opposing risks of bleeding and thrombotic complications. To date there are no controlled trials, specific guidelines, nor clear recommendations in this area. In the present review we make some recommendations about lumbar puncture in patients using these drugs. Our recommendations take into consideration the pharmacology of these drugs, the thrombotic risk according to the underlying disease, and the urgency in cerebrospinal fluid analysis. Evaluating such information and a rigorous monitoring of neurological symptoms after lumbar puncture are crucial to minimize the risk of hemorrhage associated neurological deficits. An individualized patient decision-making and an effective communication between the assistant physician and the responsible for conducting the lumbar puncture are essential to minimize potential risks.

  10. CT guided puncture aspiration and sclerosing treatment of ovary cyst

    International Nuclear Information System (INIS)

    Peng Yongjun; Du Xiumei; Yuan Jinrong; Chen Chanqing

    2007-01-01

    Objective: To analyze the method and the curative effect with CT guided percutaneous puncture aspiration and sclerosing treatment of ovary cyst. Method: 22 ovary cysts in 22 patients were treated with percutaneous puncture aspiration and underwent repeated sclerotherapy with 99.7% ethanol injection. Among the 22 patients, 18 patients had solitary ovary cyst and was aspirated with an 18-22G gauge aspiration needle. The amount of aspirated fluid varied from 30ml-500ml and 25%-30% cyst volume was replaced by appropriate ethanol Post treatment follow-up were achieved every 3 months. Results All the Punctures were successfully completed. During the 3 months to one year follow-up, 16 ovary cyst disappeared, 6 cysts were small over 50%, without main complication. Conclusion CT guided percutaneous puncture aspiration and sclerosing treatment of ovary cyst is a treatment of choice because of its safety, low complication, and high curative effect. (authors)

  11. Fuel rod puncturing and fission gas monitoring system examination techniques

    International Nuclear Information System (INIS)

    Song, Woong Sup

    1999-02-01

    Fission gas products accumulated in irradiated fuel rod is 1-2 cm 3 in CANDU and 40-50 cm 3 in PWR fuel rod. Fuel rod puncturing and fission gas monitoring system can be used for both CANDU and PWR fuel rod. This system comprises puncturing device located at in cell part and monitoring device located at out cell part. The system has computerized 9 modes and can calculate both void volume and mass volume only single puncturing. This report describes techniques and procedure for operating fuel rod puncturing and gas monitoring system which can be play an important role in successful operation of the devices. Results obtained from the analysis can give more influence over design for fuel rods. (Author). 6 refs., 9 figs

  12. The genitourinary tract

    International Nuclear Information System (INIS)

    Currarino, G.

    1985-01-01

    Considerable progress has been made in the field of pediatric uroradiology, as in most other aspects of radiology, since the last edition of this text was published in 1978. To a large extent, this progress was due to the remarkable advances in, and an increased application of, ultrasound, computed tomography, and nuclear imaging. In this section, an attempt has been made to incorporate and illustrate some of the applications of these diagnostic modalities to pediatric urology. The subjects discussed in this section include a brief account of the major radiologic procedures used in pediatric urology, followed by a review of the most common congenital and acquired diseases of the urinary tract and of the male and female genital tract, precocious puberty and intersex conditions, and disorders of the adrenal glands and related structures

  13. Radiology illustrated. Gastrointestinal tract

    International Nuclear Information System (INIS)

    Choi, Byung Ihn

    2015-01-01

    Radiology Illustrated: Gastrointestinal Tract is the second of two volumes designed to provide clear and practical guidance on the diagnostic imaging of abdominal diseases. The book presents approximately 300 cases with 1500 carefully selected and categorized illustrations of gastrointestinal tract diseases, along with key text messages and tables that will help the reader easily to recall the relevant images as an aid to differential diagnosis., Essential points are summarized at the end of each text message to facilitate rapid review and learning. Additionally, brief descriptions of each clinical problem are provided, followed by case studies of both common and uncommon pathologies that illustrate the roles of the different imaging modalities, including ultrasound, radiography, computed tomography, and magnetic resonance imaging.

  14. Radiology illustrated. Gastrointestinal tract

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Byung Ihn (ed.) [Seoul National University Hospital (Korea, Republic of). Dept. of Radiology

    2015-02-01

    Radiology Illustrated: Gastrointestinal Tract is the second of two volumes designed to provide clear and practical guidance on the diagnostic imaging of abdominal diseases. The book presents approximately 300 cases with 1500 carefully selected and categorized illustrations of gastrointestinal tract diseases, along with key text messages and tables that will help the reader easily to recall the relevant images as an aid to differential diagnosis., Essential points are summarized at the end of each text message to facilitate rapid review and learning. Additionally, brief descriptions of each clinical problem are provided, followed by case studies of both common and uncommon pathologies that illustrate the roles of the different imaging modalities, including ultrasound, radiography, computed tomography, and magnetic resonance imaging.

  15. Cerebellar Herniation after Lumbar Puncture in Galactosemic Newborn

    Directory of Open Access Journals (Sweden)

    Salih Kalay

    2011-09-01

    Full Text Available Cerebral edema resulting in elevated intracranial pressure is a well-known complication of galactosemia. Lumbar puncture was performed for the diagnosis of clinically suspected bacterial meningitis. Herniation of cerebral tissue through the foramen magnum is not a common problem in neonatal intensive care units because of the open fontanelle in infants. We present the case of a 3-week-old infant with galactosemia who presented with signs of cerebellar herniation after lumbar puncture.

  16. Predisposing factors for peripheral intravenous puncture failure in children

    OpenAIRE

    Negri,Daniela Cavalcante de; Avelar,Ariane Ferreira Machado; Andreoni,Solange; Pedreira,Mavilde da Luz Gonçalvez

    2012-01-01

    OBJECTIVE: To identify predisposing factors for peripheral intravenous puncture failure in children. METHODS: Cross-sectional cohort study conducted with 335 children in a pediatric ward of a university hospital after approval of the ethics committee. The Wald Chi-squared, Prevalence Ratio (PR) and backward procedure (p≤0.05) tests were applied. RESULTS: Success of peripheral intravenous puncture was obtained in 300 (89.5%) children and failure in 35 (10.4%). The failure rates were sign...

  17. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. There are three types of pelvic ultrasound: ...

  18. Complications of the lateral C1-C2 puncture myelography for cervical spinal canal

    International Nuclear Information System (INIS)

    Mihale, J.; Traubner, P.

    1998-01-01

    This reviewed the complications of 106 patients of the lateral C1-C2 puncture myelography for cervical spinal canal and cervical spinal cord disorders. Spinal cord puncture and contrast injection, puncture between the occiput and C1, and blood vessel puncture were the main complications. These principally depended on the misdirection of the X ray beam. For preventing major arterial puncture determined the pathway of the vertebral arteries and incidence of anomaly. (authors)

  19. Ultrasound -- Pelvis

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    Full Text Available ... Radiation Therapy for Gynecologic Cancers Radiation Therapy for Prostate Cancer top of page This page was reviewed on ... Abdomen Children's (Pediatric) Ultrasound - Abdomen Obstetric Ultrasound Ultrasound - Prostate Kidney and Bladder Stones Abnormal Vaginal Bleeding ... Images related to Ultrasound - Pelvis Sponsored by Please ...

  20. Ultrasound -- Pelvis

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    Full Text Available ... endometrial polyps fibroids cancer, especially in patients with abnormal uterine bleeding Some physicians also use 3-D ultrasound or ... Obstetric Ultrasound Ultrasound - Prostate Kidney and Bladder Stones Abnormal Vaginal Bleeding Ovarian Cancer Images related to Ultrasound - Pelvis Sponsored ...

  1. Headache in the parturient: Pathophysiology and management of post-dural puncture headache

    Directory of Open Access Journals (Sweden)

    Gita Nath

    2011-01-01

    Full Text Available Headache in the postpartum period is common and multifactorial in origin. Apart from primary causes such as tension headaches and migraine, secondary headaches such as post-dural puncture headache (PDPH are increasingly common because of increasing use of regional anaesthesia and analgesia during childbirth. Preventive measures for PDPH include the use of smaller gauge pencil-point needles for spinal blocks; epidural needles of 18 G or less; using saline rather than air for epidural space identification and the use of ultrasound guidance, especially for difficult cases such as morbid obesity and spinal deformities. In case of accidental dural puncture (ADP, the choice is between inserting the catheter in an adjacent space or intrathecal catheterization. Current evidence seems to be in favour of inserting the epidural catheter into the subarachnoid space and using the intrathecal catheter for analgesia/anaesthesia after prominently labelling it as intrathecal, to prevent misuse. It should be removed after at least 24 hours and a 10 ml bolus of saline injected before removal of catheter may be helpful. Either way, having written protocols for the management of accidental dural puncture helps to reduce the incidence of PDPH. PDPH can be disabling in severity and can mar the whole experience of childbirth. In addition, severe untreated PDPH can cause complications such as nerve palsies, subdural hematoma and cerebral venous thrombosis. Conservative methods of treatment should be tried first such as adequate hydration, paracetamol, caffeine, sumatriptan or ACTH/hydrocortisone. Epidural blood patching is the most effective treatment for PDPH. It is more effective if done 24-48 hours after dural puncture. It is an invasive procedure with its own complications as well as a failure rate of up to 30%, so that a second or even third patch may be necessary. Both these facts should be intimated to the patient beforehand. Meticulous follow-up and evaluation

  2. Genitourinary tract

    International Nuclear Information System (INIS)

    Pointon, R.C.S.

    1985-01-01

    The three principal renal tumours are: 1) Renal carcinoma; 2) Carcinoma of the renal pelvis; 3) Wilms' tumour. The first two are discussed in this chapter. Investigations of these tumours include intravenous pyelography, ultrasound and studies and CT scanning

  3. [Ultrasound-guided peripheral catheterization].

    Science.gov (United States)

    Salleras-Duran, Laia; Fuentes-Pumarola, Concepció

    2016-01-01

    Peripheral catheterization is a technique that can be difficult in some patients. Some studies have recently described the use of ultrasound to guide the venous catheterization. To describe the success rate, time required, complications of ultrasound-guided peripheral venous catheterization. and patients and professionals satisfaction The search was performed in databases (Medline-PubMed, Cochrane Library, CINAHL and Cuiden Plus) for studies published about ultrasound-guided peripheral venous catheterization performed on patients that provided results on the success of the technique, complications, time used, patient satisfaction and the type of professional who performed the technique. A total of 21 studies were included. Most of them get a higher success rate 80% in the catheterization ecoguide and time it is not higher than the traditional technique. The Technical complications analyzed were arterial puncture rates and lower nerve 10%. In all studies measuring and comparing patient satisfaction in the art ecoguide is greater. Various professional groups perform the technique. The use of ultrasound for peripheral pipes has a high success rate, complications are rare and the time used is similar to that of the traditional technique. The technique of inserting catheters through ultrasound may be learned by any professional group performing venipuncture. Finally, it gets underscores the high patient satisfaction with the use of this technique. Copyright © 2015 Elsevier España, S.L.U. All rights reserved.

  4. Relativistic hydrodynamics in the presence of puncture black holes

    International Nuclear Information System (INIS)

    Faber, Joshua A.; Etienne, Zachariah B.; Shapiro, Stuart L.; Taniguchi, Keisuke; Baumgarte, Thomas W.

    2007-01-01

    Many of the recent numerical simulations of binary black holes in vacuum adopt the moving puncture approach. This successful approach avoids the need to impose numerical excision of the black hole interior and is easy to implement. Here we wish to explore how well the same approach can be applied to moving black hole punctures in the presence of relativistic hydrodynamic matter. First, we evolve single black hole punctures in vacuum to calibrate our Baumgarte-Shapiro-Shibata-Nakamura implementation and to confirm that the numerical solution for the exterior spacetime is invariant to any junk (i.e., constraint-violating) initial data employed in the black hole interior. Then we focus on relativistic Bondi accretion onto a moving puncture Schwarzschild black hole as a numerical test bed for our high-resolution shock-capturing relativistic hydrodynamics scheme. We find that the hydrodynamical equations can be evolved successfully in the interior without imposing numerical excision. These results help motivate the adoption of the moving puncture approach to treat the binary black hole-neutron star problem using conformal thin-sandwich initial data

  5. Needle puncture in rabbit functional spinal units alters rotational biomechanics.

    Science.gov (United States)

    Hartman, Robert A; Bell, Kevin M; Quan, Bichun; Nuzhao, Yao; Sowa, Gwendolyn A; Kang, James D

    2015-04-01

    An in vitro biomechanical study for rabbit lumbar functional spinal units (FSUs) using a robot-based spine testing system. To elucidate the effect of annular puncture with a 16 G needle on mechanical properties in flexion/extension, axial rotation, and lateral bending. Needle puncture of the intervertebral disk has been shown to alter mechanical properties of the disk in compression, torsion, and bending. The effect of needle puncture in FSUs, where intact spinal ligaments and facet joints may mitigate or amplify these changes in the disk, on spinal motion segment stability subject to physiological rotations remains unknown. Rabbit FSUs were tested using a robot testing system whose force/moment and position precision were assessed to demonstrate system capability. Flexibility testing methods were developed by load-to-failure testing in flexion/extension, axial rotation, and lateral bending. Subsequent testing methods were used to examine a 16 G needle disk puncture and No. 11 blade disk stab (positive control for mechanical disruption). Flexibility testing was used to assess segmental range-of-motion (degrees), neutral zone stiffness (N m/degrees) and width (degrees and N m), and elastic zone stiffness before and after annular injury. The robot-based system was capable of performing flexibility testing on FSUs-mean precision of force/moment measurements and robot system movements were elastic zone stiffness in flexion and lateral bending. These findings suggest that disk puncture and stab can destabilize FSUs in primary rotations.

  6. Imaging strategies in pediatric urinary tract infection

    Energy Technology Data Exchange (ETDEWEB)

    Dacher, Jean-Nicolas [University of Rouen, Quant-IF Laboratory, School of Medicine and Pharmacy, Rouen (France); Rouen University Hospital Charles Nicolle, Department of Radiology, Rouen (France); UFR Medecine Pharmacie de Rouen, Laboratoire Quant-If, Rouen (France); Hitzel, Anne; Vera, Pierre [University of Rouen, Quant-IF Laboratory, School of Medicine and Pharmacy, Rouen (France); CRLCC Henri Becquerel, Department of Nuclear Medicine, Rouen (France); Avni, Fred E. [Free University of Brussels, Department of Radiology, Erasmus Hospital, Brussels (Belgium)

    2005-07-01

    This article is focused on the controversial topic of imaging strategies in pediatric urinary tract infection. A review of the recent literature illustrates the complementary roles of ultrasound, diagnostic radiology and nuclear medicine. The authors stress the key role of ultrasound which has recently been debated. The commonly associated vesicoureteric reflux has to be classified as congenital or secondary due to voiding dysfunction. A series of frequently asked questions are addressed in a second section. The proposed answers are not the product of a consensus but should rather be considered as proposals to enrich the ongoing debate concerning the evaluation of urinary tract infection in children. (orig.)

  7. Imaging strategies in pediatric urinary tract infection

    International Nuclear Information System (INIS)

    Dacher, Jean-Nicolas; Hitzel, Anne; Vera, Pierre; Avni, Fred E.

    2005-01-01

    This article is focused on the controversial topic of imaging strategies in pediatric urinary tract infection. A review of the recent literature illustrates the complementary roles of ultrasound, diagnostic radiology and nuclear medicine. The authors stress the key role of ultrasound which has recently been debated. The commonly associated vesicoureteric reflux has to be classified as congenital or secondary due to voiding dysfunction. A series of frequently asked questions are addressed in a second section. The proposed answers are not the product of a consensus but should rather be considered as proposals to enrich the ongoing debate concerning the evaluation of urinary tract infection in children. (orig.)

  8. Imaging of the urinary tract in adults

    International Nuclear Information System (INIS)

    Aslaksen, A.; Hunskaar, S.; Hoeisaeter, P.Aa.

    1990-01-01

    This article discusses the indications for imaging of the urinary tract from the general practitioners' point of view. Urography should be used in the control of patients with previous attacks of ureteral colic, in patients presenting macroscopic hematuria and as a preoperative investigation prior to extracorporal shock wave lithotripsy (ESWL). Ultrasound should be chosen in patients with microscopic hematuria and non-specific abdominal pain. Computerized tomography should be used in cases with non-specific findings using urography and ultrasound. There are no indications for imaging in women with recurrent urinary tract infection, in men with benign prostatic hypertrophy and in the evaluation of hypertension. 14 refs., 5 tabs

  9. A new device of CT-targeted percutaneous punctures

    International Nuclear Information System (INIS)

    Ozdoba, C.

    1990-01-01

    This paper reports on a device for CT-targeted percutaneous punctures. After extensive phantom studies, punctures of vertebral disk space (diskography/nucleotomy) and orbit retrobulbar anesthesia/biopsy were performed in 15 patients. The new device is easy to mount on the CT scanner and does not require additional devices affixed to the patient. Its design and construction permit exact calculation of needle angle and depth, even when the gantry is tilted. Percutaneous biopsies can be performed in approximately 40 minutes. The device is accurate within ±0.5 mm, thereby allowing puncture of even small lesions deep in the orbital cone. Retrobulbar anesthesia can be performed safely in patients with a long myopic bulbus; in nucleotomy, instant control of the instrument's position within the disk space is possible

  10. Side effects after diagnostic lumbar puncture and lumbar iohexol myelography

    International Nuclear Information System (INIS)

    Sand, T.; Stovner, L.J.; Salvesen, R.; Dale, L.

    1987-01-01

    A prospective, controlled study was performed to compare side effect incidences after lumbar iohexol myelography (n=97) and diagnostic lumbar puncture (n=85). No significant side effect incidence differences (iohexol vs. controls) were found regarding number of patients with any side effect (63 vs. 73%), headache (44 vs. 54%), nausea, dizziness, visual, auditory, or psychic symptoms. Early-onset headache occurred significantly more often in the iohexol group (16 vs 5%), while postural headache occurred most frequently after lumbar puncture (25 vs. 41%). These results suggest that apart from the slight early-onset headache, most side effets after lumbar iohexol myelography are related to the puncture per se, not to the contrast agent. (orig.)

  11. Urinary Tract Infection (UTI)

    Science.gov (United States)

    ... Home A-Z Health Topics Urinary tract infections Urinary tract infections > A-Z Health Topics Urinary tract infections (PDF, ... Embed Subscribe To receive Publications email updates Submit Urinary tract infections Urinary tract infections (UTIs) are most often caused ...

  12. Liouville theory and uniformization of four-punctured sphere

    Science.gov (United States)

    Hadasz, Leszek; Jaskólski, Zbigniew

    2006-08-01

    A few years ago Zamolodchikov and Zamolodchikov proposed an expression for the four-point classical Liouville action in terms of the three-point actions and the classical conformal block [Nucl. Phys. B 477, 577 (1996)]. In this paper we develop a method of calculating the uniformizing map and the uniformizing group from the classical Liouville action on n-punctured sphere and discuss the consequences of Zamolodchikovs conjecture for an explicit construction of the uniformizing map and the uniformizing group for the sphere with four punctures.

  13. Ultrasound -- Pelvis

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    Full Text Available ... diagnose symptoms experienced by women such as: pelvic pain abnormal vaginal bleeding other menstrual problems Ultrasound exams ... pelvic ultrasound can help evaluate: pelvic masses pelvic pain ambiguous genitalia and anomalies of pelvic organs early ...

  14. Ultrasound -- Pelvis

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  15. Prostate Ultrasound

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    Full Text Available ... pictures of a man’s prostate gland and to help diagnose symptoms such as difficulty urinating or an ... Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. Prostate ultrasound, ...

  16. Ultrasound -- Pelvis

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  17. Ultrasound -- Pelvis

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    Full Text Available ... internal organs, as well as blood flowing through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. There are three types of pelvic ultrasound: abdominal ( transabdominal ) vaginal ( transvaginal / endovaginal ) ...

  18. Ultrasound -- Pelvis

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    Full Text Available ... There are three types of pelvic ultrasound: abdominal, vaginal (for women), and rectal (for men). These exams ... are three types of pelvic ultrasound: abdominal ( transabdominal ) vaginal ( transvaginal / endovaginal ) for women rectal ( transrectal ) for men ...

  19. Ultrasound -- Pelvis

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    Full Text Available ... the procedure? In women, a pelvic ultrasound is most often performed to evaluate the: uterus cervix ovaries ... page How is the procedure performed? Transabdominal: For most ultrasound exams, you will be positioned lying face- ...

  20. Ultrasound -- Pelvis

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  1. Ultrasound -- Pelvis

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  2. Prostate Ultrasound

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    Full Text Available ... top of page What are the benefits vs. risks? Benefits Ultrasound is widely available, easy-to-use ... procedures such as needle biopsies and fluid aspiration. Risks For standard diagnostic ultrasound , there are no known ...

  3. Ultrasound -- Pelvis

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    Full Text Available ... insertion. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... modality for the diagnosis and monitoring of pregnant women and their unborn babies. Ultrasound provides real-time ...

  4. Ultrasound -- Pelvis

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    Full Text Available ... ovarian cysts and uterine fibroids ovarian or uterine cancers A transvaginal ultrasound is usually performed to view the endometrium (the lining of the uterus) and the ovaries. Transvaginal ultrasound also evaluates the myometrium (muscular walls ...

  5. Prostate Ultrasound

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    Full Text Available ... those sound waves to create an image. Ultrasound examinations do not use ionizing radiation (as used in ... abnormal masses, such as tumors. In an ultrasound examination, a transducer both sends the sound waves into ...

  6. Ultrasound -- Pelvis

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    Full Text Available ... needles are used to extract a sample of cells from organs for laboratory testing. Doppler ultrasound images ... ultrasound, measures the direction and speed of blood cells as they move through vessels. The movement of ...

  7. Ultrasound -- Pelvis

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  8. Prostate Ultrasound

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  9. Ultrasound -- Pelvis

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    Full Text Available ... Ultrasound is the preferred imaging modality for the diagnosis and monitoring of pregnant women and their unborn ... sexes without x-ray exposure. Risks For standard diagnostic ultrasound , there are no known harmful effects on ...

  10. Prostate Ultrasound

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  11. Ultrasound -- Pelvis

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  12. Prostate Ultrasound

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  13. Ultrasound -- Pelvis

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    Full Text Available ... Imaging? Ultrasound waves are disrupted by air or gas; therefore ultrasound is not an ideal imaging technique ... page Additional Information and Resources RTAnswers.org Radiation Therapy for Gynecologic Cancers Radiation Therapy for Prostate Cancer ...

  14. Prostate Ultrasound

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    Full Text Available ... ultrasound images are captured in real-time, they can show the structure and movement of the body's ... Because ultrasound provides real-time images, it also can be used to guide procedures such as needle ...

  15. Prostate Ultrasound

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    Full Text Available ... of page What will I experience during and after the procedure? Ultrasound exams in which the transducer ... in the sperm or urine following the procedure. After an ultrasound examination, you should be able to ...

  16. Ultrasound -- Pelvis

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    Full Text Available ... investigation of the uterine cavity . Three-dimensional (3-D) ultrasound permits evaluation of the uterus and ovaries ... abnormal uterine bleeding Some physicians also use 3-D ultrasound or sonohysterography for patients with infertility. In ...

  17. Prostate Ultrasound

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    Full Text Available ... and produces pictures of the inside of the body using sound waves. Ultrasound imaging, also called ultrasound ... from the probe through the gel into the body. The transducer collects the sounds that bounce back ...

  18. Ultrasound -- Pelvis

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    Full Text Available ... and produces pictures of the inside of the body using sound waves. Ultrasound imaging, also called ultrasound ... from the probe through the gel into the body. The transducer collects the sounds that bounce back ...

  19. Ultrasound -- Pelvis

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    Full Text Available ... object is solid or filled with fluid). In medicine, ultrasound is used to detect changes in appearance, ... have special pediatric considerations. The teddy bear denotes child-specific content. Related Articles and Media Sonohysterography Ultrasound - ...

  20. Obstetrical Ultrasound

    Science.gov (United States)

    ... heartbeat can be seen as an ongoing ultrasound movie. Ultrasound devices also use Doppler, a special application ... the possible charges you will incur. Web page review process: This Web page is reviewed regularly by ...

  1. Ultrasound -- Pelvis

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    Full Text Available ... insertion. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... have special pediatric considerations. The teddy bear denotes child-specific content. Related Articles and Media Sonohysterography Ultrasound - ...

  2. Ultrasound -- Pelvis

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    Full Text Available ... menstrual problems Ultrasound exams also help identify: palpable masses such as ovarian cysts and uterine fibroids ovarian ... In children, pelvic ultrasound can help evaluate: pelvic masses pelvic pain ambiguous genitalia and anomalies of pelvic ...

  3. Prostate Ultrasound

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    Full Text Available ... Ultrasound is safe, noninvasive, and does not use ionizing radiation. This procedure requires little to no special preparation. ... create an image. Ultrasound examinations do not use ionizing radiation (as used in x-rays ), thus there is ...

  4. Ultrasound -- Pelvis

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  5. Ultrasound -- Pelvis

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    Full Text Available ... and development of an embryo or fetus during pregnancy. See the Obstetrical Ultrasound page for more information . ... object is solid or filled with fluid). In medicine, ultrasound is used to detect changes in appearance, ...

  6. Ultrasound -- Pelvis

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    Full Text Available ... most ultrasound exams, you will be positioned lying face-up on an examination table that can be ... region of the prostate. A biopsy will add time to the procedure. If a Doppler ultrasound study ...

  7. Ultrasound -- Pelvis

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    Full Text Available ... ultrasound: abdominal, vaginal (for women), and rectal (for men). These exams are frequently used to evaluate the ... vaginal ( transvaginal / endovaginal ) for women rectal ( transrectal ) for men A Doppler ultrasound exam may be part of ...

  8. Ultrasound -- Pelvis

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    Full Text Available ... transducer sends out high-frequency sound waves (that the human ear cannot hear) into the body and then ... ultrasound , there are no known harmful effects on humans. top of page What are the limitations of Pelvic Ultrasound Imaging? Ultrasound waves are ...

  9. Recent Advances in Thermoplastic Puncture-Healing Polymers

    Science.gov (United States)

    Bogert, Philip B.; Working, Dennis C.; Wise, Kristopher E.; Smith, Janice Y.; Topping, Crystal C.; Britton, Sean M.; Bagby, Paul R.; Siochi, Emilie J.

    2010-01-01

    The motivation for this work is to develop self-healing polymeric materials to enable damage tolerant systems, and to tailor puncture healing for use temperatures and applications. This will be a benefit in environments and conditions where access for manual repair is limited or impossible, or where damage may not be detected.

  10. Routine Cranial Computed Tomography before Lumbar Puncture in ...

    African Journals Online (AJOL)

    Background: Current international guidelines recommend that a cranial computed tomography (CT) be performed on all HIV-positive patients presenting with new onset seizures, before a lumbar puncture (LP) is performed. In the South African setting, however this delay could be life threatening. The present study sought to ...

  11. Consensus guidelines for lumbar puncture in patients with neurological diseases

    NARCIS (Netherlands)

    S. Engelborghs (Sebastiaan); Niemantsverdriet, E. (Ellis); H. Struyfs (Hanne); K. Blennow (Kaj); Brouns, R. (Raf); M. Comabella (Manuel); I. Dujmovic (Irena); W.M. van der Flier (Wiesje); L. Frölich (Lutz); D. Galimberti (Daniela); S. Gnanapavan (Sharmilee); B. Hemmer` (Bernhard); E.I. Hoff (Erik I.); Hort, J. (Jakub); E. Iacobaeus (Ellen); M. Ingelsson (Martin); Jan de Jong, F. (Frank); Jonsson, M. (Michael); M. Khalil (Michael); J. Kuhle (Jens); A. Lleo (Alberto); A. De Mendonça (Alexandre); J.L. Molinuevo (José Luis); G. Nagels (Guy); C. Paquet (Claire); L. Parnetti; C.M.A.A. Roks (Gerwin); Rosa-Neto, P. (Pedro); P. Scheltens (Philip); C. Skarsgård (Constance); E. Stomrud (Erik); H. Tumani (Hayrettin); P. Visser (Pim); Wallin, A. (Anders); B. Winblad; H. Zetterberg (Henrik); F.H. Duits (Flora H.); C.E. Teunissen (Charlotte)

    2017-01-01

    textabstractIntroduction Cerebrospinal fluid collection by lumbar puncture (LP) is performed in the diagnostic workup of several neurological brain diseases. Reluctance to perform the procedure is among others due to a lack of standards and guidelines to minimize the risk of complications, such as

  12. On Railroad Tank Car Puncture Performance: Part I - Considering Metrics

    Science.gov (United States)

    2016-04-12

    This paper is the first in a two-part series on the puncture performance of railroad tank cars carrying hazardous materials in the event of an accident. Various metrics are often mentioned in the open literature to characterize the structural perform...

  13. On Railroad Tank Car Puncture Performance: Part II - Estimating Metrics

    Science.gov (United States)

    2016-04-12

    This paper is the second in a two-part series on the puncture performance of railroad tank cars carrying hazardous materials in the event of an accident. Various metrics are often mentioned in the open literature to characterize the structural perfor...

  14. Secondary tracheoesophageal puncture in-office using Seldinger technique.

    Science.gov (United States)

    Britt, Christopher J; Lippert, Dylan; Kammer, Rachael; Ford, Charles N; Dailey, Seth H; McCulloch, Timothy; Hartig, Gregory

    2014-05-01

    Evaluate the safety and efficacy of in-office secondary tracheoesophageal puncture (TEP) technique using transnasal esophagoscopy (TNE) and the Seldinger technique in conjunction with a cricothyroidotomy kit for placement. Case series with chart review. Academic medical center. A retrospective chart review was performed on 83 subjects who underwent in-office secondary TEP. Variables that were examined included disease site, staging, histologic diagnosis, extent of resection and reconstruction, chemoradiation, functional voice status (as assessed by speech pathologist in most recent note), and complications directly related to the procedure. Eighty-three individuals from our institution met our criteria for in-office secondary TEP from 2005 to August 2012. Of these, 97.6% (81/83) had no complications of TEP. The overall complication rate was 2.4% (2/83). Complications included bleeding from puncture site and closure of puncture site after dislodgement of prosthesis at the time of puncture. Fluent conversational speech was achieved in 69.9% of all patients (58/83), and an additional 19.3% (16/83) achieved functional/intelligible speech; of those, 3.6% (3/83) were unable to achieve fluent conversational speech due to anatomic defects from previous surgery. An in-office TEP can be safely performed using the Seldinger technique with direct visualization using TNE, despite the extent of resection or reconstruction, with functional speech outcomes comparable to other studies available in the literature.

  15. Use of Lumbar Punctures in the Management of Ocular Syphilis.

    Science.gov (United States)

    Reekie, Ian; Reddy, Yaviche

    2018-01-01

    Ocular syphilis has become rare in the developed world, but is a common presentation to ophthalmology departments in South Africa. We investigated the proportion of patients diagnosed with ocular syphilis who went on to receive lumbar punctures, and determined the fraction of these who had cerebrospinal fluid findings suggestive of neurosyphilis. We aimed to determine whether the use of lumbar punctures in ocular syphilis patients was beneficial in picking up cases of neurosyphilis. Retrospective study of case notes of patients admitted to two district hospitals in Durban, South Africa, with ocular syphilis over a 20-month period. A total of 31 of 68 ocular syphilis patients underwent lumbar puncture, and of these, eight (25.8%) had findings suggestive of neurosyphilis. Lumbar puncture in ocular syphilis patients should continue to be a routine part of the investigation of these patients; a large proportion of ocular syphilis patients show cerebrospinal fluid findings suggestive of neurosyphilis, are at risk of the complications of neurosyphilis, and should be managed accordingly.

  16. Complications of lumbar puncture in a child treated for leukaemia

    International Nuclear Information System (INIS)

    Staebler, Melanie; Delpierre, Isabelle; Damry, Nash; Christophe, Catherine; Azzi, Nadira; Sekhara, Tayeb

    2005-01-01

    Lumbar puncture may lead to neurological complications. These include intracranial hypotension, cervical epidural haematomas, and cranial and lumbar subdural haematomas. MRI is the modality of choice to diagnose these complications. This report documents MRI findings of such complications in a child treated for leukaemia. (orig.)

  17. Therapeutic effects of visual standard channel combined with F4.8 visual puncture super-mini percutaneous nephrolithotomy on multiple renal calculi.

    Science.gov (United States)

    Cui, Zhenyu; Gao, Yanjun; Yang, Wenzeng; Zhao, Chunli; Ma, Tao; Shi, Xiaoqiang

    2018-01-01

    To evaluate the therapeutic effects of visual standard channel combined with F4.8 visual puncture super-mini percutaneous nephrolithotomy (SMP) on multiple renal calculi. The clinical data of 46 patients with multiple renal calculi treated in Affiliated Hospital of Hebei University from October 2015 to September 2016 were retrospectively analyzed. There were 28 males and 18 females aged from 25 to 65 years old, with an average of 42.6. The stone diameters were 3.0-5.2 cm, (4.3 ± 0.8) cm on average. F4.8 visual puncture-assisted balloon expansion was used to establish a standard channel. After visible stones were removed through nephroscopy combined with ultrasound lithotripsy, the stones of other parts were treated through F4.8 visual puncture SMP with holmium laser. Indices such as the total time of channel establishment, surgical time, decreased value of hemoglobin, phase-I stone clearance rate and surgical complications were summarized. Single standard channel was successfully established in all cases with the assistance of F4.8 visual puncture, of whom 24 were combined with a single microchannel, 16 were combined with double microchannels, and six were combined with three microchannels. All patients were placed with nephrostomy tube which was not placed in the microchannels. Both F5 double J tubes were placed after surgery. The time for establishing a standard channel through F4.8 visual puncture was (6.8 ± 1.8) min, and that for establishing a single F4.8 visual puncture microchannel was (4.5 ± 0.9) min. The surgical time was (92 ± 15) min. The phase-I stone clearance rate was 91.3% (42/46), and the decreased value of hemoglobin was (12.21 ± 2.5) g/L. There were 8 cases of postoperative fever which was relieved after anti-inflammatory treatment. Four cases had 0.5-0.8 cm of stone residue in the lower calyx, and all stones were discharged one month after surgery by in vitro shock wave lithotripsy combined with position nephrolithotomy, without stone

  18. Performance and complications of lumbar puncture in memory clinics : Results of the multicenter lumbar puncture feasibility study

    NARCIS (Netherlands)

    Duits, Flora H.; Martinez-Lage, Pablo; Paquet, Claire; Engelborghs, Sebastiaan; Lleo, Alberto; Hausner, Lucrezia; Molinuevo, Jose L.; Stomrud, Erik; Farotti, Lucia; Ramakers, Inez H. G. B.; Tsolaki, Magda; Skarsgard, Constance; Astrand, Ragnar; Wallin, Anders; Vyhnalek, Martin; Holmber-Clausen, Marie; Forlenza, Orestes V.; Ghezzi, Laura; Ingelsson, Martin; Hoff, Erik I.; Roks, C.M.A.A.; de Mendonca, Alexandre; Papma, Janne M.; Izagirre, Andrea; Taga, Mariko; Struyfs, Hanne; Alcolea, Daniel A.; Froelich, Lutz; Balasa, Mircea; Minthon, Lennart; Twisk, Jos W. R.; Persson, Staffan; Zetterberg, Henrik; van der Flier, Wiesje M.; Teunissen, Charlotte E.; Scheltens, Philip; Blennow, Kaj

    2016-01-01

    Introduction Lumbar puncture (LP) is increasingly performed in memory clinics. We investigated patient-acceptance of LP, incidence of and risk factors for post-LP complications in memory clinic populations. Methods We prospectively enrolled 3868 patients (50% women, age 66 ± 11 years, mini mental

  19. Using a Motion Sensor-Equipped Smartphone to Facilitate CT-Guided Puncture

    International Nuclear Information System (INIS)

    Hirata, Masaaki; Watanabe, Ryouhei; Koyano, Yasuhiro; Sugata, Shigenori; Takeda, Yukie; Nakamura, Seiji; Akamune, Akihisa; Tsuda, Takaharu; Mochizuki, Teruhito

    2017-01-01

    PurposeTo demonstrate the use of “Smart Puncture,” a smartphone application to assist conventional CT-guided puncture without CT fluoroscopy, and to describe the advantages of this application.Materials and MethodsA puncture guideline is displayed by entering the angle into the application. Regardless of the angle at which the device is being held, the motion sensor ensures that the guideline is displayed at the appropriate angle with respect to gravity. The angle of the smartphone’s liquid crystal display (LCD) is also detected, preventing needle deflection from the CT slice image. Physicians can perform the puncture procedure by advancing the needle using the guideline while the smartphone is placed adjacent to the patient. In an experimental puncture test using a sponge as a target, the target was punctured at 30°, 50°, and 70° when the device was tilted to 0°, 15°, 30°, and 45°, respectively. The punctured target was then imaged with a CT scan, and the puncture error was measured.ResultsThe mean puncture error in the plane parallel to the LCD was less than 2°, irrespective of device tilt. The mean puncture error in the sagittal plane was less than 3° with no device tilt. However, the mean puncture error tended to increase when the tilt was increased.ConclusionThis application can transform a smartphone into a valuable tool that is capable of objectively and accurately assisting CT-guided puncture procedures.

  20. Using a Motion Sensor-Equipped Smartphone to Facilitate CT-Guided Puncture

    Energy Technology Data Exchange (ETDEWEB)

    Hirata, Masaaki, E-mail: masaaki314@gmail.com [Matsuyama Shimin Hospital, Department of Radiology (Japan); Watanabe, Ryouhei; Koyano, Yasuhiro [Matsuyama Shimin Hospital, Department of Surgery (Japan); Sugata, Shigenori; Takeda, Yukie [Ehime Prefectural Imabari Hospital, Department of Radiology (Japan); Nakamura, Seiji; Akamune, Akihisa [Matsuyama Shimin Hospital, Department of Radiology (Japan); Tsuda, Takaharu; Mochizuki, Teruhito [Ehime University Graduate School of Medicine, Department of Radiology (Japan)

    2017-04-15

    PurposeTo demonstrate the use of “Smart Puncture,” a smartphone application to assist conventional CT-guided puncture without CT fluoroscopy, and to describe the advantages of this application.Materials and MethodsA puncture guideline is displayed by entering the angle into the application. Regardless of the angle at which the device is being held, the motion sensor ensures that the guideline is displayed at the appropriate angle with respect to gravity. The angle of the smartphone’s liquid crystal display (LCD) is also detected, preventing needle deflection from the CT slice image. Physicians can perform the puncture procedure by advancing the needle using the guideline while the smartphone is placed adjacent to the patient. In an experimental puncture test using a sponge as a target, the target was punctured at 30°, 50°, and 70° when the device was tilted to 0°, 15°, 30°, and 45°, respectively. The punctured target was then imaged with a CT scan, and the puncture error was measured.ResultsThe mean puncture error in the plane parallel to the LCD was less than 2°, irrespective of device tilt. The mean puncture error in the sagittal plane was less than 3° with no device tilt. However, the mean puncture error tended to increase when the tilt was increased.ConclusionThis application can transform a smartphone into a valuable tool that is capable of objectively and accurately assisting CT-guided puncture procedures.

  1. Rare patterns of dorsal puncture in Pterostichus oblongopunctatus (Coleoptera: Carabidae

    Directory of Open Access Journals (Sweden)

    Axel Schwerk

    2018-04-01

    Full Text Available Background The carabid beetle species Pterostichus oblongopunctatus is common in different types of forests in Poland and Europe. With respect to this species, some unclarities exist concerning the morphological feature of punctures on the elytra. P. oblongopunctatus has dorsal pits in the third interval of the elytra, the available identification keys, however, provide inconsistent information concerning the puncture in other intervals. During long-term studies at different study sites in Poland, the first author rarely but regularly discovered individuals with unusual dorsal puncture patterns, i.e., pits in the fifth and even in the seventh interval of the elytra. Since such rare patterns might be connected with special habitat characteristics, and thus have a potential as an indicator, the aim of the study was to test if they are connected with specific subpopulations (interaction groups, if they are related to the sex or size of the beetles, and if they are related to specific habitat conditions. Material and Methods We counted the pits on the elytra, determined the sex, and measured the length of the right elytron of individuals of P. oblongopunctatus collected at numerous study sites located within the borders of the Regional Directory of National Forests in Piła (Western Poland over the period 2014–2016. Results Altogether, 1,058 individuals of P. oblongopunctatus were subjected to statistical analysis. Almost 19% of the individuals had a dorsal puncture in the fifth interval of the elytra and about 0.7% had a dorsal puncture in the seventh interval of the elytra. In 2014 and 2015, significantly more females exhibited such unusual patterns of dorsal puncture than males. Even if not statistically significant, in 2016 also relatively more females showed such a pattern. Neither males nor females of the analysed individuals with usual puncture patterns showed a significant difference in the length of the right elytron from those with

  2. Inexpensive homemade models for ultrasound-guided vein cannulation training.

    Science.gov (United States)

    Di Domenico, Stefano; Santori, Gregorio; Porcile, Elisa; Licausi, Martina; Centanaro, Monica; Valente, Umberto

    2007-11-01

    To test the hypothesis that low-cost homemade models may be used to acquire the basic skills for ultrasound-guided central vein puncture. Training study. University transplantation department. Training was performed using three different homemade models (A, B, and C). Segments of a common rubber tourniquet (V1) and Silastic tube (V2) were used to simulate vessels within agar-based models. Overall cost for each model was less than 5 euro (US$7). For each test (test I, A-V1; II, A-V2; III, B-V1; IV, C-V2), the number of punctures and attempts needed to locate the needle inside the lumen were recorded. Each test was considered completed when participants punctured the vessels at the first attempt for three consecutive times. In test I, the mean number of punctures and attempts were 3.85 +/- 1.26 and 4.95 +/- 3.05; in test II, 4.60 +/- 1.14 and 6.30 +/- 2.51; in test III, 4.80 +/- 1.06 and 4.65 +/- 2.21; and in test IV, 4.45 +/- 1.23 and 6.05 +/- 2.92, respectively. For each test, no statistical difference was found by comparison of number of punctures and attempts for anesthesiologists versus nonanesthesiologists, men versus women, or previous experience versus no experience with central vein cannulation (CVC). Video game users obtained better results than did nonusers in test I (punctures, P = 0.033; attempts, P = 0.038), test II (punctures, P = 0.052; attempts, P = 0.011), and test IV (punctures, P = 0.001; attempts, P = 0.003). A posttraining questionnaire showed favorable opinions about the clarity of the instructions, aptness of the models, and adequacy of the training. In our operative unit, the use of ultrasound guidance for CVC increased from 2% to 23% in the first month after training. Low-cost homemade models are useful in acquiring basic coordination skills for ultrasound-guided CVC.

  3. Pleural puncture with thoracic epidural: A rare complication?

    Directory of Open Access Journals (Sweden)

    Rachna Wadhwa

    2011-01-01

    Full Text Available Freedom from pain has almost developed to be a fundamental human right. Providing pain relief via epidural catheters in thoracic and upper abdominal surgeries is widely accepted. Pain relief through this technique not only provides continuous analgesia but also reduces post-operative pulmonary complications and also hastens recovery. But being a blind procedure it is accompanied by certain complications. Hypotension, dura puncture, high epidural, total spinal, epidural haematoma, spinal cord injury and infection are some of the documented side effects of epidural block. There are case reports eliciting neurological complications, catheter site infections, paresthesias, radicular symptoms and worsening of previous neurological conditions. Few technical problems related to breakage of epidural catheter are also mentioned in the literature. The patient had no sequelae on long term follow up even when a portion of catheter was retained. We present a case report where epidural catheter punctured pleura in a patient undergoing thoracotomy for carcinoma oesophagus.

  4. Accuracy of ultrasound-measured bladder wall thickness for the ...

    African Journals Online (AJOL)

    M.M. Ali

    history taking, general physical and genital examination, urine analysis, urine culture, blood chemistry, ... supine position, using an ultrasound device (BK Medical, Herlev, .... The standardisation of terminology of lower urinary tract function:.

  5. The exchange algebra for Liouville theory on punctured Riemann sphere

    International Nuclear Information System (INIS)

    Shen Jianmin; Sheng Zhengmao

    1991-11-01

    We consider in this paper the classical Liouville field theory on the Riemann sphere with n punctures. In terms of the uniformization theorem of Riemann surface, we show explicitly the classical exchange algebra (CEA) for the chiral components of the Liouville fields. We find that the matrice which dominate the CEA is related to the symmetry of the Lie group SL(n) in a nontrivial manner with n>3. (author). 10 refs

  6. Cervical myelography via C1/C2 lateral puncture

    International Nuclear Information System (INIS)

    Grange, B.

    1981-01-01

    The use of the water soluble, tri-iodinated contrast medium, metrizamide, in cervical myelography via C1/C2 lateral puncture is described. Details of the tomographic apparatus and the technique employed are given. The advantages of water soluble myelography using metrizamide are overwhelming due to its miscibility with CSF, improved anatomical demonstration, radiographic visualisation and diagnostic accuracy and advantageous pharmacological properties with reduced toxicity. This technique provided successful diagnoses in a series of 104 patients. (U.K.)

  7. A case of subdural hematoma following lumbar puncture

    Directory of Open Access Journals (Sweden)

    Ramatharaknath Vemuri

    2017-01-01

    Full Text Available Lumbar puncture (LP is a frequent procedure done for administration of spinal anesthesia or for obtaining cerebrospinal fluid for analysis. The common complications of LP are pain at the local site and headache. Fortunately, the serious complications such as infections of central nervous system, brain stem herniation, and subdural hematoma are rare. We present a rare case of subdural hematoma following a LP.

  8. Liouville theory and uniformization of four-punctured sphere

    OpenAIRE

    Hadasz, Leszek; Jaskolski, Zbigniew

    2006-01-01

    Few years ago Zamolodchikov and Zamolodchikov proposed an expression for the 4-point classical Liouville action in terms of the 3-point actions and the classical conformal block. In this paper we develop a method of calculating the uniformizing map and the uniformizing group from the classical Liouville action on n-punctured sphere and discuss the consequences of Zamolodchikovs conjecture for an explicit construction of the uniformizing map and the uniformizing group for the sphere with four ...

  9. Rabbit models of cerebral vasospasm established with endovascular puncture

    International Nuclear Information System (INIS)

    Tu Jianfei; Liu Yizhi; Ji Jiansong; Zhao Zhongwei

    2008-01-01

    Objective: To investigate the method of endovascular puncture to establish rabbit models of cerebral vasospasm. Methods: New Zealand white rabbits were divided into 5 groups (12 h, 1 d, 2 d, 3 d and 7 d) randomly, and each group was separated into subarachnoid hemorrhage (SAH) subgroup (n=5) and control subgroup (n=2). cerebral vascular spasm (CVS) models were established after SAH with endovascular puncture. CT scans before and after operation were performed. The internal diameters and the wall thicknesses of posterior communicans artery (PcoA) and basilar artery (BA) were measured with HE stain after the animals were executed. Results: CVS model was successfully eastblished in 35 rabbits (SAH subgroup 25, control subgroup 10), resulting a successful rate of 48.61%. Compared with control subgroup, PcoA and BA showed shrinkage of internal diameters of 43.60% and 51.82% 12 h after SAH, respectively, and the shrinkage appeared as biphasic patterns until the 7th study day with another peaks of 29.32% and 45.19%, respectively. Conclusions: Endovascular puncture is an effective method to establish rabbit of CVS. The death rate of animals can be decreased with the asage of new interventional material and perfection for the details of operation. (authors)

  10. A new multiple noncontinuous puncture (pointage technique for corneal tattooing

    Directory of Open Access Journals (Sweden)

    Jin Hyoung Park

    2015-10-01

    Full Text Available AIM:To assess the safety and cosmetic efficacy of a new multiple noncontinuous transepithelial puncture technique for tattooing a decompensated cornea.METHODS:It was anon-comparative clinical case series study.The study examines 33 eyes in 33 patients with total corneal opacity due to corneal decompensation, which developed following intraocular surgery.Corneal tattooing was performed using the multiple noncontinuous transepithelial puncture technique (i.e. pointage. The safety of this new surgical strategy was assessed by occurrence of adverse events for the follow-up period. The cosmetic efficacy was determined by the patient’s cosmetic satisfaction and independent observer’s opinion about patient appearance.RESULTS:Seven women and 26 men were included in the study. The mean age was 46.4±17.5y (range:7-67. In total, 30 of 33 patients (91% reported cosmetic satisfaction within the follow-up period. Only 3 patients (9% required additional tattooing due to cosmetic unsatisfaction. Cosmetic outcomes were analyzed and classified as excellent or good in 13 (39% and 17 (52% patients, respectively. No serious adverse events developed, except delayed epithelial healing in 3 cases.CONCLUSION:The cosmetic outcomes of the multiple noncontinuous transepithelial puncture technique for corneal tattooing were good. The safety of this method is higher than conventional procedures. This new procedure also provides improved cost-effectiveness and safety over current corneal tattooing techniques.

  11. A new cerebral vasospasm model established with endovascular puncture technique

    International Nuclear Information System (INIS)

    Tu Jianfei; Liu Yizhi; Ji Jiansong; Zhao Zhongwei

    2011-01-01

    Objective: To investigate the method of establishing cerebral vasospasm (CVS) models in rabbits by using endovascular puncture technique. Methods: Endovascular puncture procedure was performed in 78 New Zealand white rabbits to produce subarachnoid hemorrhage (SAH). The survival rabbits were randomly divided into seven groups (3 h, 12 h, 1 d, 2 d, 3 d, 7 d and 14 d), with five rabbits in each group for both study group (SAH group) and control group. Cerebral CT scanning was carried out in all rabbits both before and after the operation. The inner diameter and the thickness of vascular wall of both posterior communicating artery (PcoA) and basilar artery (BA) were determined after the animals were sacrificed, and the results were analyzed. Results: Of 78 experimental rabbits, CVS model was successfully established in 45, including 35 of SAH group and 10 control subgroup. The technical success rate was 57.7%. Twelve hours after the procedure, the inner diameter of PcoA and BA in SAH group was decreased by 45.6% and 52.3%, respectively, when compared with these in control group. The vascular narrowing showed biphasic changes, the inner diameter markedly decreased again at the 7th day when the decrease reached its peak to 31.2% and 48.6%, respectively. Conclusion: Endovascular puncture technique is an effective method to establish CVS models in rabbits. The death rate of experimental animals can be decreased if new interventional material is used and the manipulation is carefully performed. (authors)

  12. Impact of Corrugated Paperboard Structure on Puncture Resistance

    Directory of Open Access Journals (Sweden)

    Vaidas Bivainis

    2015-03-01

    Full Text Available Thanks to its excellentprotective properties, lightness, a reasonable price, and ecology, corrugated paperboardis one of the most popular materials used in the production of packaging for variousproducts. During transportation or storage, packaging with goods can be exposedto the mass of other commodities, dropping from heights and transportationshock loads, which can lead to their puncture damage. Depending on the purposeand size of the packaging, the thickness, grammage, constituent paper layers,numbers of layers and type of fluting of corrugated paperboard used in itsproduction differ. A standard triangular prism, corrugated paperboard fixationplates and a universal tension-compression machine were used to investigate theimpact of corrugated paperboard structure and other parameters on the punctureresistance of the material. The investigation determines the maximum punctureload and estimates energy required to penetrate the corrugated paperboard. Itwas found that the greatest puncture resistance is demonstrated by paperboardwith a larger number of corrugating flutings and the board produced from harderpaper with a smaller amount of recycled paper. It was established that thegrammage of three-layered paperboard with two different fluting profiles has thegreatest impact on the level of static puncture energy.DOI: http://dx.doi.org/10.5755/j01.ms.21.1.5713

  13. Puncture Self-Healing Polymers for Aerospace Applications

    Science.gov (United States)

    Gordon, Keith L.; Penner, Ronald K.; Bogert, Phil B.; Yost, W. T.; Siochi, Emilie J.

    2011-01-01

    Space exploration launch costs on the order of $10K per pound provide ample incentive to seek innovative, cost-effective ways to reduce structural mass without sacrificing safety and reliability. Damage-tolerant structural systems can provide a route to avoiding weight penalty while enhancing vehicle safety and reliability. Self-healing polymers capable of spontaneous puncture repair show great promise to mitigate potentially catastrophic damage from events such as micrometeoroid penetration. Effective self-repair requires these materials to heal instantaneously following projectile penetration while retaining structural integrity. Poly(ethylene-co-methacrylic acid) (EMMA), also known as Surlyn is an ionomer-based copolymer that undergoes puncture reversal (self-healing) following high impact puncture at high velocities. However EMMA is not a structural engineering polymer, and will not meet the demands of aerospace applications requiring self-healing engineering materials. Current efforts to identify candidate self-healing polymer materials for structural engineering systems are reported. Rheology, high speed thermography, and high speed video for self-healing semi-crystalline and amorphous polymers will be reported.

  14. Diuretic ultrasound - noninvasive method for assessment of congenital hydronephrosis in children

    International Nuclear Information System (INIS)

    Bueva, A.; Gaidarova, M.; Zlatanova, G.

    2012-01-01

    Ureteropelvic junction obstruction is the most common congenital abnormality of the urinary tract. Its incidence is 5 cases per 100 000 population annually. Several functional methods are available: diuretic renography, diuretic ultrasound and diuretic urography. The aim of this study is to compare the sensitivity and the specificity of the diuretic ultrasound and renography in the evaluation of upper urinary tract obstruction. (authors)

  15. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... internal organs, as well as blood flowing through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. ...

  16. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... inserted into a man's rectum to view the prostate. Transvaginal ultrasound. The transducer is inserted into a ... Stenting Ultrasound-Guided Breast Biopsy Obstetric Ultrasound Ultrasound - Prostate Biopsies - Overview Images related to General Ultrasound Videos ...

  17. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z General Ultrasound Ultrasound imaging uses sound waves to produce ... the limitations of General Ultrasound Imaging? What is General Ultrasound Imaging? Ultrasound is safe and painless, and ...

  18. The skin-to-calyx distance measured by renal ct scan and ultrasound

    Energy Technology Data Exchange (ETDEWEB)

    Shan, Chen Jen; Mazzucchi, Eduardo; Payão, Fabio; Gomes, Andrea Cavalanti; Baroni, Ronaldo Hueb; Torricelli, Fabio Cesar; Vicentini, Fabio Carvalho; Srougi, Miguel [Hospital das Clínicas, University of Sao Paulo Medical School, Sao Paulo, SP (Brazil)

    2014-03-15

    Purpose: We developed a stereotactic device to guide the puncture for percutaneous nephrolithotripsy, which uses the distance from the target calyx to its perpendicular point on skin (SCD) to calculate the needle´s entry angle. This study seeks to validate the use of measurements obtained by ultrasound (US) and computerized tomography (CT) for needle´s entry angle calculation and to study factors that may interfere in this procedure. Materials and Methods: Height, weight, abdominal circumference, CT of the urinary tract in dorsal decubitus (DD) and ventral decubitus (VD), and US of the kidneys in VD were obtained from thirty-five renal calculi patients. SCD obtained were compared and correlated with body-mass index (BMI). Results: BMI was 28.66 ± 4.6 Kg/m2. SCD on CT in DD was 8.40 ± 2.06cm, in VD was 8.32 ± 1.95cm, in US was 6.74 ± 1.68cm. SCD measured by US and CT were statistically different (p < 0.001), whereas between CT in DD and VD were not. SCD of the lower calyx presented moderate correlation with BMI. Conclusion: SCD obtained by CT in ventral and dorsal decubitus may be used for calculation of the needle´s entry angle. SCD obtained by US cannot be used. A rule for the correlation between BMI and the SCD could not be determined. (author)

  19. Ultrasound-guided antegrade pyelography of renal transplants

    International Nuclear Information System (INIS)

    Wernecke, K.; Heckemann, R.; Rehwald, U.; Ringert, R.H.; Essen Univ.

    1983-01-01

    The indications for, and technique of, ultrasound-guided antegrade pyelography of renal transplants are illustrated by eight patients. Because of the detailed anatomical information which the antegrade method provides, it is superior to other diagnostic methods for the investigation of ureteric obstruction or fistulae. The severity of renal pelvis dilatation as shown by sonography must not be taken as a criterian for the grade of obstruction, since transplants may show dilated collecting systems, even in the absence of obstruction. In our view, real time sonography with a suitable probe provides the best means of achieving successful puncture of the renal pelvis. The combination of ultrasound-guided puncture and radiological contrast examination of the ureter is the best diagnostic method available and lead, in all eight cases, to immediate and definitive treatment. (orig.)

  20. Combined CT- and fluoroscopy-guided nephrostomy in patients with non-obstructive uropathy due to urine leaks in cases of failed ultrasound-guided procedures

    International Nuclear Information System (INIS)

    Sommer, C.M.; Huber, J.; Radeleff, B.A.; Hosch, W.; Stampfl, U.; Loenard, B.M.; Hallscheidt, P.; Haferkamp, A.; Kauczor, H.U.; Richter, G.M.

    2011-01-01

    Aim: To report our experience of combined CT- and fluoroscopy-guided nephrostomy in patients with non-obstructive uropathy due to urine leaks in cases of failed ultrasound-guided procedures. Patients and methods: Eighteen patients (23 kidneys) with non-obstructive uropathy due to urine leaks underwent combined CT- and fluoroscopy-guided nephrostomy. All procedures were indicated as second-line interventions after failed ultrasound-guided nephrostomy. Thirteen males and five females with an age of 62.3 ± 8.7 (40–84) years were treated. Urine leaks developed in majority after open surgery, e.g. postoperative insufficiency of ureteroneocystostomy (5 kidneys). The main reasons for failed ultrasound-guided nephrostomy included anatomic obstacles in the puncture tract (7 kidneys), and inability to identify pelvic structures (7 kidneys). CT-guided guidewire placement into the collecting system was followed by fluoroscopy-guided nephrostomy tube positioning. Procedural success rate, major and minor complication rates, CT-views and needle passes, duration of the procedure and radiation dose were analyzed. Results: Procedural success was 91%. Major and minor complication rates were 9% (one septic shock and one perirenal abscess) and 9% (one perirenal haematoma and one urinoma), respectively. 30-day mortality rate was 6%. Number of CT-views and needle passes were 9.3 ± 6.1 and 3.6 ± 2.6, respectively. Duration of the complete procedure was 87 ± 32 min. Dose-length product and dose-area product were 1.8 ± 1.4 Gy cm and 3.9 ± 4.3 Gy cm 2 , respectively. Conclusions: Combined CT- and fluoroscopy-guided nephrostomy in patients with non-obstructive uropathy due to urine leaks in cases of failed ultrasound-guided procedures was feasible with high technical success and a tolerable complication rate.

  1. Digestive tract

    International Nuclear Information System (INIS)

    Rocha, A.F.G. da

    1976-01-01

    Scintiscanning of salivary glands with (sup 99m)Tc is commented. The uses of triolein - and oleic acid labelled with 131 I, 125 I or 82 Br are discussed in the study of fat absorption, as well as 14 C and 191 Y. The use of 57 Co as a radiotracer in the intestinal absorption of vitamin B 12 is analysed. Orientation is given about 51 Cr - albumin clearance in the study of plasmatic protein loss by digestive tract. The radiotracers 131 I, 125 I and 51 Cr are pointed out in the investigation of immunoglobulins. Consideration is given to the quantification of digestive bleedings by the use of 51 Cr [pt

  2. Prostate Ultrasound

    Medline Plus

    Full Text Available ... be able to give a clearer picture of soft tissues that do not show up well on x-ray images. Ultrasound causes no health problems and may be repeated as often as is necessary if medically indicated. Ultrasound provides real-time imaging, making it a good tool for guiding ...

  3. Prostate Ultrasound

    Science.gov (United States)

    ... be able to give a clearer picture of soft tissues that do not show up well on x-ray images. Ultrasound causes no health problems and may be repeated as often as is necessary if medically indicated. Ultrasound provides real-time imaging, making it a good tool for guiding ...

  4. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available Toggle navigation Test/Treatment Patient Type Screening/Wellness Disease/Condition Safety En Español More Info Images/Videos About Us News Physician Resources Professions Site Index A-Z Ultrasound - Pelvis Ultrasound imaging of the pelvis uses sound waves to ...

  5. Interventional ultrasound

    International Nuclear Information System (INIS)

    VanSonnenberg, E.

    1987-01-01

    This book contains 12 chapters and several case studies. Some of the chapter titles are: The Interplay of Ultrasound and Computed Tomography in the Planning and Execution of Interventional Procedures: Ulltrasound Guided Biopsy; Interventioal Genitourinary Sonography; Diagnosis and Treatment of Pericardial Effusion Using Ultrasonic Guidance; and New Ultrasound-Guided Interventional Procedures--Cholecystostomy, Pancreatography, Gastrostomy

  6. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available Toggle navigation Test/Treatment Patient Type Screening/Wellness Disease/Condition Safety En Español More Info Images/Videos About Us News Physician Resources Professions Site Index A-Z Ultrasound - Pelvis Ultrasound imaging ...

  7. Prostate Ultrasound

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    Full Text Available Toggle navigation Test/Treatment Patient Type Screening/Wellness Disease/Condition Safety En Español More Info Images/Videos About Us News Physician Resources Professions Site Index A-Z Ultrasound - Prostate Ultrasound of ...

  8. Ultrasound stethoscopy

    NARCIS (Netherlands)

    E.C. Vourvouri (Eleni)

    2002-01-01

    textabstractIn this thesis we repmi the many evaluation studies with the hand-held ultrasound device in the assessment of different cardiac pathologies and in different clinical settings. The reason for using the tetm "ultrasound stethoscopy" is that these devices are augmenting our

  9. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... to-use and less expensive than other imaging methods. Ultrasound imaging is extremely safe and does not use any ionizing radiation. Ultrasound scanning gives a clear picture of soft tissues that do not show up well on ...

  10. Prostate Ultrasound

    Medline Plus

    Full Text Available ... the best way to see if treatment is working or if a finding is stable or changed over time. top of page What are the benefits vs. risks? Benefits Ultrasound is widely available, easy-to-use and less expensive than other imaging methods. Ultrasound imaging uses ...

  11. Prostate Ultrasound

    Medline Plus

    Full Text Available ... the patient. Because ultrasound images are captured in real-time, they can show the structure and movement of ... blood test result. difficulty urinating. Because ultrasound provides real-time images, it also can be used to guide ...

  12. Discussion on the method to increase the successful rate of L5/S1 intervertebral disc puncture

    International Nuclear Information System (INIS)

    Zhong Xianyi; Li Liangjun; Yu Chengxin

    2007-01-01

    Objective: To study the effective methods of L 5 /S 1 intervertebral disc puncture without drilling to solve the barriers from iliaca. Methods: (1) puncturing with belly-buttock sticking out: to enlarge waist sacro-iliaca angle to move the puncture point up; (2) puncturing through intervertebral edge: puncturing through L 5 to 1/3 intervertebral disc to make the puncture point move Up; (3) puncturing through L 5 /S 1 intervertebral disc with the self-made puncture location instrument. Results with the methods, 280 cases with L 5 /S 1 intervertebral disc protrusion have been successfully punctured, with successful rate 100%. Conclusion: These methods are ideal and easy to use to treat L 5 /S 1 intervertebral disc protrusion puncture, and worth popularizing. (authors)

  13. The Tension and Puncture Properties of HDPE Geomembrane under the Corrosion of Leachate.

    Science.gov (United States)

    Xue, Qiang; Zhang, Qian; Li, Zhen-Ze; Xiao, Kai

    2013-09-17

    To investigate the gradual failure of high-density polyethylene (HDPE) geomembrane as a result of long-term corrosion, four dynamic corrosion tests were conducted at different temperatures and durations. By combining tension and puncture tests, we systematically studied the variation law of tension and puncture properties of the HDPE geomembrane under different corrosion conditions. Results showed that tension and puncture failure of the HDPE geomembrane was progressive, and tensile strength in the longitudinal grain direction was evidently better than that in the transverse direction. Punctures appeared shortly after puncture force reached the puncture strength. The tensile strength of geomembrane was in inversely proportional to the corrosion time, and the impact of corrosion was more obvious in the longitudinal direction than transverse direction. As corrosion time increased, puncture strength decreased and corresponding deformation increased. As with corrosion time, the increase of corrosion temperature induced the decrease of geomembrane tensile strength. Tensile and puncture strength were extremely sensitive to temperature. Overall, residual strength had a negative correlation with corrosion time or temperature. Elongation variation increased initially and then decreased with the increase in temperature. However, it did not show significant law with corrosion time. The reduction in puncture strength and the increase in puncture deformation had positive correlations with corrosion time or temperature. The geomembrane softened under corrosion condition. The conclusion may be applicable to the proper designing of the HDPE geomembrane in landfill barrier system.

  14. [Ultrasound of the urinary system].

    Science.gov (United States)

    Segura-Grau, A; Herzog, R; Díaz-Rodriguez, N; Segura-Cabral, J M

    2016-09-01

    Ultrasound techniques are able to provide a fairly complete examination of the urinary system, achieving a high sensitivity in relevant-pathology detection, especially in the kidney, bladder and prostate. Early detection of pathologies such as tumors or urinary tract obstructions, sometimes even before their clinical manifestation, has improved their management and prognosis in many cases. This, added to its low cost and harmlessness, makes ultrasound ideal for early approaches and follow-up of a wide number of urinary system pathologies. In this article, the ultrasound characteristics of the main urinary system pathologies that can be diagnosed by this technique, are reviewed. Copyright © 2014 Sociedad Española de Médicos de Atención Primaria (SEMERGEN). Publicado por Elsevier España, S.L.U. All rights reserved.

  15. Two stents insertion via single tract for treatment of hepatic hilar cholangiocarcinoma

    International Nuclear Information System (INIS)

    Xie Zonggui; Jin Peng; Xie Zhiyong; Yi Yuhai; Zhang Xuping

    2003-01-01

    Objective: To evaluate the feasibility and clinical application of two stents insertion via single tract for treatment of hepatic hilar cholangiocarcinoma. Methods: Eighteen patients with hepatic hilar cholangiocarcinoma who had left and right bile duct obstruction were treated with stents insertion via right bile duct puncturing routeway. These two stents were implanted between right and left bile duct, and between right bile duct and common bile duct. Results: Eighteen patients obtained successful two stents placement by right bile duct puncturing tract and succeeded with internal drainage for all biliary tree jaundice subsided distinctly. Conclusions: The technique of two stents insertion via single tract could predigest interventional drainage procedure of high bile duct obstruction, reduce operation trauma, shorten handling time and possess promising application value

  16. The effects of needle deformation during lumbar puncture

    Directory of Open Access Journals (Sweden)

    Hasan Hüseyin Özdemir

    2015-01-01

    Full Text Available Objective: The aim of this study is to assess deformation of the tip and deflection from the axis of 22-gauge Quincke needles when they are used for diagnostic lumbar puncture (LP. Thus, it can be determined whether constructional alterations of needles are important for predicting clinical problems after diagnostic LP. Materials and Methods: The 22-gauge Quincke needles used for diagnostic LP were evaluated. A specially designed protractor was used for measurement and evaluation. Waist circumference was measured in each patient. Patients were questioned about headaches occurring after LP. Results: A total of 115 Quincke-type spinal needles used in 113 patients were evaluated. No deflection was detected in 38 (33.1% of the needles. Deflection between 0.1° and 5° occurred in 43 (37.3% of the needles and deflection ≥ 5.1° occurred in 34 patients (29.6%. Forty-seven (41.5% patients experienced post lumbar puncture headache (PLPH and 13 (11.5% patients experienced intracranial hypotension (IH. No statistically significant correlation between the degree of deflection and headache was found (P > 0.05. Epidural blood patch was performed for three patients. Deformity in the form of bending like a hook occurred in seven needles and IH occurred in six patients using these needles. Two of the needles used in three patients requiring blood patch were found to be bent. Conclusion: Deformation of needles may increase complications after LP. Needle deformation may lead to IH. In case of deterioration in the structure of the needle, termination of the puncture procedure and the use of a new needle could reduce undesirable clinical consequences, especially IH.

  17. The effects of needle deformation during lumbar puncture

    Science.gov (United States)

    Özdemir, Hasan Hüseyin; Demir, Caner F.; Varol, Sefer; Arslan, Demet; Yıldız, Mustafa; Akil, Eşref

    2015-01-01

    Objective: The aim of this study is to assess deformation of the tip and deflection from the axis of 22-gauge Quincke needles when they are used for diagnostic lumbar puncture (LP). Thus, it can be determined whether constructional alterations of needles are important for predicting clinical problems after diagnostic LP. Materials and Methods: The 22-gauge Quincke needles used for diagnostic LP were evaluated. A specially designed protractor was used for measurement and evaluation. Waist circumference was measured in each patient. Patients were questioned about headaches occurring after LP. Results: A total of 115 Quincke-type spinal needles used in 113 patients were evaluated. No deflection was detected in 38 (33.1%) of the needles. Deflection between 0.1° and 5° occurred in 43 (37.3%) of the needles and deflection ≥ 5.1° occurred in 34 patients (29.6%). Forty-seven (41.5%) patients experienced post lumbar puncture headache (PLPH) and 13 (11.5%) patients experienced intracranial hypotension (IH). No statistically significant correlation between the degree of deflection and headache was found (P > 0.05). Epidural blood patch was performed for three patients. Deformity in the form of bending like a hook occurred in seven needles and IH occurred in six patients using these needles. Two of the needles used in three patients requiring blood patch were found to be bent. Conclusion: Deformation of needles may increase complications after LP. Needle deformation may lead to IH. In case of deterioration in the structure of the needle, termination of the puncture procedure and the use of a new needle could reduce undesirable clinical consequences, especially IH. PMID:25883480

  18. The optical "Veress-needle"--initial puncture with a minioptic.

    Science.gov (United States)

    Schaller, G; Kuenkel, M; Manegold, B C

    1995-02-01

    Laparoscopic access is a necessary part of minimally invasive surgery. The double blind puncture with Veress-needle and trocar can cause lethal complications such as bowel injury, bleeding and gas-embolisation. Some authors have reported alternative techniques for laparoscopic abdominal access. Because no blind procedure can absolutely prevent injury, permanent visual control of perforated tissue layers as in open surgery should be achieved to prevent possible injury at an early stage. Previously described procedures could not fulfil all requirements to comply with this ideal, i.e. permanent visual control of abdominal wall penetration prior to establishment of pneumoperitoneum and trocar insertion without further possible damage. We designed a 2 mm fibreglass optic 250 mm in length that is inserted into a suitable cannula. Special construction allows rinsing through the cannula to clear the vision and to open spaces in the puncture track by water dissection. After incision of the skin, all layers of the abdominal wall can be visualised, including blood vessels and internal surfaces. Once the abdominal cavity is reached, the needle tip is retracted and a two-step dilation allows the trocar to be introduced via the puncture track. Only then does insufflation begin. The fibreglass optic-equipped safety needle was used for visually controlled access in 184 laparoscopic surgical procedures. After a period of training, all layers of the abdominal wall could be recognised exactly. In two patients with dense adhesions, perforation of the small bowel was diagnosed immediately by endoscopic viewing. The small injury needed no treatment, and the intended procedure was completed laparoscopically.(ABSTRACT TRUNCATED AT 250 WORDS)

  19. Reinvestigation of moving punctured black holes with a new code

    International Nuclear Information System (INIS)

    Cao Zhoujian; Yo Hweijang; Yu Juiping

    2008-01-01

    We report on our code, in which the moving puncture method is applied and an adaptive/fixed mesh refinement is implemented, and on its preliminary performance on black hole simulations. Based on the Baumgarte-Sharpiro-Shibata-Nakamura (BSSN) formulation, up-to-date gauge conditions and the modifications of the formulation are also implemented and tested. In this work, we present our primary results about the simulation of a single static black hole, of a moving single black hole, and of the head-on collision of a binary black hole system. For the static punctured black hole simulations, different modifications of the BSSN formulation are applied. It is demonstrated that both the currently used sets of modifications lead to a stable evolution. For cases of a moving punctured black hole with or without spin, we search for viable gauge conditions and study the effect of spin on the black hole evolution. Our results confirm previous results obtained by other research groups. In addition, we find a new gauge condition, which has not yet been adopted by any other researchers, which can also give stable and accurate black hole evolution calculations. We examine the performance of the code for the head-on collision of a binary black hole system, and the agreement of the gravitational waveform it produces with that obtained in other works. In order to understand qualitatively the influence of matter on the binary black hole collisions, we also investigate the same head-on collision scenarios but perturbed by a scalar field. The numerical simulations performed with this code not only give stable and accurate results that are consistent with the works by other numerical relativity groups, but also lead to the discovery of a new viable gauge condition, as well as clarify some ambiguities in the modification of the BSSN formulation. These results demonstrate that this code is reliable and ready to be used in the study of more realistic astrophysical scenarios and of numerical

  20. Bacterial migration through punctured surgical gloves under real surgical conditions

    Directory of Open Access Journals (Sweden)

    Heidecke Claus-Dieter

    2010-07-01

    Full Text Available Abstract Background The aim of this study was to confirm recent results from a previous study focussing on the development of a method to measure the bacterial translocation through puncture holes in surgical gloves under real surgical conditions. Methods An established method was applied to detect bacterial migration from the operating site through the punctured glove. Biogel™ double-gloving surgical gloves were used during visceral surgeries over a 6-month period. A modified Gaschen-bag method was used to retrieve organisms from the inner glove, and thus-obtained bacteria were compared with micro-organisms detected by an intra-operative swab. Results In 20 consecutive procedures, 194 gloves (98 outer gloves, 96 inner gloves were examined. The rate of micro-perforations of the outer surgical glove was 10% with a median wearing time of 100 minutes (range: 20-175 minutes. Perforations occurred in 81% on the non-dominant hand, with the index finger most frequently (25% punctured. In six cases, bacterial migration could be demonstrated microbiologically. In 5% (5/98 of outer gloves and in 1% (1/96 of the inner gloves, bacterial migration through micro-perforations was observed. For gloves with detected micro-perforations (n = 10 outer layers, the calculated migration was 50% (n = 5. The minimum wearing time was 62 minutes, with a calculated median wearing time of 71 minutes. Conclusions This study confirms previous results that bacterial migration through unnoticed micro-perforations in surgical gloves does occur under real practical surgical conditions. Undetected perforation of surgical gloves occurs frequently. Bacterial migration from the patient through micro-perforations on the hand of surgeons was confirmed, limiting the protective barrier function of gloves if worn over longer periods.

  1. Bilateral subdural hematoma secondary to accidental dural puncture

    Directory of Open Access Journals (Sweden)

    Sofía Ramírez

    2015-07-01

    Full Text Available We report the case of a 25-year-old woman, who received epidural analgesia for labor pain and subsequently presented post-dural puncture headache. Conservative treatment was applied and epidural blood patch was performed. In the absence of clinical improvement and due to changes in the postural component of the headache, a brain imaging test was performed showing a bilateral subdural hematoma.The post-dural puncture headache is relatively common, but the lack of response to established medical treatment as well as the change in its characteristics and the presence of neurological deficit, should raise the suspicion of a subdural hematoma, which although is rare, can be lethal if not diagnosed and treated at the right time. Resumo: Apresentamos o caso clínico de uma paciente de 25 anos de idade, na qual uma técnica peridural foi realizada durante o trabalho de parto e posteriormente apresentou cefaleia com características de cefaleia pós-punção dural. Foi iniciado tratamento conservador e tampão de sangue peridural. Devido a ausência de melhora clínica e à mudança do componente postural da cefaleia, decidiu-se realizar um exame de imagem cerebral que demostrou a presença de hematoma subdural bilateral.A cefaleia pós-punção dural é relativamente frequente, mas a falta de resposta ao tratamento médico instaurado, assim como a mudança em suas características e a presença de foco neurológico, devem levantar a suspeita de presença de um hematoma subdural que, embora infrequente, pode chegar a ser devastador se não for diagnosticado e tratado oportunamente. Keywords: Accidental dural puncture, Epidural analgesia, Post-dural puncture headache, Subdural hematoma, Epidural blood patch, Palavras chave: Dura-Máter, Analgesia epidural, Cefaleia pós-punção dural, Hematoma subdural, Placa de sangue epidural

  2. Urinary Tract Health

    Science.gov (United States)

    ... related to the urinary tract health of women: Urinary Tract Infections (UTIs) and Urinary Incontinence (UI). For information on a range of urinary tract health issues for women, men, and children, visit the National Kidney and Urologic Diseases Information ...

  3. Fetal Ultrasound

    Science.gov (United States)

    ... isn't recommended simply to determine a baby's sex. Similarly, fetal ultrasound isn't recommended solely for the purpose of producing keepsake videos or pictures. If your health care provider doesn' ...

  4. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... and movement of the body's internal organs, as well as blood flowing through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. ...

  5. Prostate Ultrasound

    Medline Plus

    Full Text Available ... and movement of the body's internal organs, as well as blood flowing through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. ...

  6. Prostate Ultrasound

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    Full Text Available ... nodule felt by a physician during a routine physical exam or prostate cancer screening exam. an elevated blood test result. difficulty urinating. Because ultrasound provides real-time ...

  7. Prostate Ultrasound

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    Full Text Available ... requested the exam. Usually, the referring physician or health care provider will share the results with you. ... well on x-ray images. Ultrasound causes no health problems and may be repeated as often as ...

  8. Ultrasound -- Pelvis

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    Full Text Available ... ultrasound exams are also used to monitor the health and development of an embryo or fetus during ... requested the exam. Usually, the referring physician or health care provider will share the results with you. ...

  9. Prostate Ultrasound

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    Full Text Available ... probe) and ultrasound gel placed directly on the skin. High-frequency sound waves are transmitted from the ... the transducer (the device placed on the patient's skin to send and receive the returning sound waves), ...

  10. Ultrasound -- Pelvis

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    Full Text Available ... probe) and ultrasound gel placed directly on the skin. High-frequency sound waves are transmitted from the ... the transducer (the device placed on the patient's skin to send and receive the returning sound waves), ...

  11. Prostate Ultrasound

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    Full Text Available ... no ionizing radiation. Ultrasound scanning may be able to give a clearer picture of soft tissues that do ... understanding of the possible charges you will incur. Web page review process: This Web page is reviewed ...

  12. Ultrasound -- Pelvis

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    Full Text Available ... use different transducers (with different capabilities) during a single exam. The transducer sends out high-frequency sound ... modality for the diagnosis and monitoring of pregnant women and their unborn babies. Ultrasound provides real-time ...

  13. Ultrasound -- Pelvis

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    Full Text Available ... collects the sounds that bounce back and a computer then uses those sound waves to create an ... Ultrasound scanners consist of a console containing a computer and electronics, a video display screen and a ...

  14. Prostate Ultrasound

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    Full Text Available ... collects the sounds that bounce back and a computer then uses those sound waves to create an ... Ultrasound scanners consist of a console containing a computer and electronics, a video display screen and a ...

  15. Prostate Ultrasound

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    Full Text Available ... sends out high-frequency sound waves (that the human ear cannot hear) into the body and then ... ultrasound , there are no known harmful effects on humans. top of page What are the limitations of ...

  16. Prostate Ultrasound

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    Full Text Available ... is located directly in front of the rectum, so the ultrasound exam is performed transrectally in order ... A follow-up examination may also be necessary so that any change in a known abnormality can ...

  17. Prostate Ultrasound

    Medline Plus

    Full Text Available ... the rectal wall is relatively insensitive to the pain in the region of the prostate. A biopsy ... needle biopsies and fluid aspiration. Risks For standard diagnostic ultrasound , there are no known harmful effects on ...

  18. Prostate Ultrasound

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    Full Text Available ... diagnose symptoms such as difficulty urinating or an elevated blood test result. It’s also used to investigate ... physical exam or prostate cancer screening exam. an elevated blood test result. difficulty urinating. Because ultrasound provides ...

  19. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... The principles are similar to sonar used by boats and submarines. The ultrasound image is immediately visible ... principles involved in the sonar used by bats, ships and fishermen. When a sound wave strikes an ...

  20. Ultrasound -- Pelvis

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    Full Text Available ... areas of the body while other areas, especially air-filled lungs, are poorly suited for ultrasound. For ... make secure contact with the body and eliminate air pockets between the transducer and the skin that ...

  1. Prostate Ultrasound

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    Full Text Available ... a follow-up exam is done because a potential abnormality needs further evaluation with additional views or ... of soft tissues that do not show up well on x-ray images. Ultrasound causes no health ...

  2. Ultrasound -- Pelvis

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    Full Text Available ... a follow-up exam is done because a potential abnormality needs further evaluation with additional views or ... of soft tissues that do not show up well on x-ray images. Ultrasound is the preferred ...

  3. Ultrasound -- Pelvis

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    Full Text Available ... is smaller than the standard speculum used when performing a Pap test . A protective cover is placed ... of soft tissues that do not show up well on x-ray images. Ultrasound is the preferred ...

  4. Prostate Ultrasound

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    Full Text Available ... scanning or sonography , involves the use of a small transducer (probe) and ultrasound gel placed directly on ... to do the scanning. The transducer is a small hand-held device that resembles a microphone, attached ...

  5. Ultrasound -- Pelvis

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    Full Text Available ... scanning or sonography , involves the use of a small transducer (probe) and ultrasound gel placed directly on ... the child prior to the exam. Bringing books, small toys, music or games can help to distract ...

  6. Prostate Ultrasound

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    Full Text Available ... less than 20 minutes. top of page What will I experience during and after the procedure? Ultrasound ... in the region of the prostate. A biopsy will add time to the procedure. Rarely, a small ...

  7. Ultrasound -- Pelvis

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    Full Text Available ... ultrasound images are reviewed. top of page What will I experience during and after the procedure? For ... in the region of the prostate. A biopsy will add time to the procedure. If a Doppler ...

  8. Ultrasound -- Pelvis

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    Full Text Available ... arteries and veins in the abdomen, arms, legs, neck and/or brain (in infants and children) or ... diagnose symptoms experienced by women such as: pelvic pain abnormal vaginal bleeding other menstrual problems Ultrasound exams ...

  9. Prostate Ultrasound

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    Full Text Available ... gel. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... the best way to see if treatment is working or if a finding is stable or changed ...

  10. Ultrasound -- Pelvis

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    Full Text Available ... and development of an embryo or fetus during pregnancy. See the Obstetrical Ultrasound page for more information . ... move through vessels. The movement of blood cells causes a change in pitch of the reflected sound ...

  11. Ultrasound -- Pelvis

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    Full Text Available ... abdomen, arms, legs, neck and/or brain (in infants and children) or within various body organs such ... and monitoring of pregnant women and their unborn babies. Ultrasound provides real-time imaging, making it a ...

  12. Ultrasound -- Pelvis

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    Full Text Available ... to-use and less expensive than other imaging methods. Ultrasound imaging is extremely safe and does not ... barium exams, CT scanning , and MRI are the methods of choice in such a setting. Large patients ...

  13. Ultrasound -- Pelvis

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    Full Text Available ... insertion. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... move through vessels. The movement of blood cells causes a change in pitch of the reflected sound ...

  14. Prostate Ultrasound

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    Full Text Available ... gel. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... requested the exam. Usually, the referring physician or health care provider will share the results with you. ...

  15. Ultrasound -- Pelvis

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    Full Text Available ... insertion. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... requested the exam. Usually, the referring physician or health care provider will share the results with you. ...

  16. Ultrasound imaging

    International Nuclear Information System (INIS)

    Wells, P.N.T.

    1983-01-01

    Ultrasound is a form of energy which consists of mechanical vibrations the frequencies of which are so high that they are above the range of human hearing. The lower frequency limit of the ultrasonic spectrum may generally be taken to be about 20 kHz. Most biomedical applications of ultrasound employ frequencies in the range 1-15 MHz. At these frequencies, the wavelength is in the range 1.5 - 0.1 mm in soft tissues, and narrow beams of ultrasound can be generated which propagate through such tissues without excessive attenuation. This chapter begins with brief reviews of the physics of diagnostic ultrasound pulse-echo imaging methods and Doppler imaging methods. The remainder of the chapter is a resume of the applications of ultrasonic imaging to physiological measurement

  17. Ultrasound -- Pelvis

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    Full Text Available ... be necessary. Your doctor will explain the exact reason why another exam is requested. Sometimes a follow- ... Ultrasound provides real-time imaging, making it a good tool for guiding minimally invasive procedures such as ...

  18. Prostate Ultrasound

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    Full Text Available ... be necessary. Your doctor will explain the exact reason why another exam is requested. Sometimes a follow- ... Ultrasound provides real-time imaging, making it a good tool for guiding minimally invasive procedures such as ...

  19. Ultrasound -- Pelvis

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    Full Text Available ... frequently used to evaluate the reproductive and urinary systems. Ultrasound is safe, noninvasive and does not use ... and evaluate a variety of urinary and reproductive system disorders in both sexes without x-ray exposure. ...

  20. Ultrasound -- Pelvis

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    Full Text Available ... be asked to drink water prior to the examination to fill your bladder. Leave jewelry at home ... those sound waves to create an image. Ultrasound examinations do not use ionizing radiation (as used in ...

  1. Prostate Ultrasound

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    Full Text Available ... top of page Additional Information and Resources RTAnswers.org Radiation Therapy for Prostate Cancer top of page ... to Ultrasound - Prostate Sponsored by Please note RadiologyInfo.org is not a medical facility. Please contact your ...

  2. Prostate Ultrasound

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    Full Text Available ... with measurements acquired as needed for any treatment planning. detect an abnormal growth within the prostate. help ... end of their bowel (rectum) removed during prior surgery are not good candidates for ultrasound of the ...

  3. Ultrasound -- Pelvis

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    Full Text Available ... tip of the transducer is smaller than the standard speculum used when performing a Pap test . A ... both sexes without x-ray exposure. Risks For standard diagnostic ultrasound , there are no known harmful effects ...

  4. Prostate Ultrasound

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    Full Text Available ... prostate gland and to help diagnose symptoms such as difficulty urinating or an elevated blood test result. ... image. Ultrasound examinations do not use ionizing radiation (as used in x-rays ), thus there is no ...

  5. Ultrasound -- Pelvis

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    Full Text Available ... in the abdomen, arms, legs, neck and/or brain (in infants and children) or within various body organs ... or uterine cancers A transvaginal ultrasound is usually performed to view ...

  6. Prostate Ultrasound

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    Full Text Available ... is enlarged, also known as benign prostatic hyperplasia (BPH) , with measurements acquired as needed for any treatment ... caption Related Articles and Media Benign Prostatic Hyperplasia (BPH) (Enlargement of the Prostate) Prostate Cancer Ultrasound- and ...

  7. Ultrasound -- Pelvis

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    Full Text Available ... the exam. Bringing books, small toys, music or games can help to distract the child and make ... modality for the diagnosis and monitoring of pregnant women and their unborn babies. Ultrasound provides real-time ...

  8. Ultrasound -- Pelvis

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    Full Text Available ... uterine cavity . Three-dimensional (3-D) ultrasound permits evaluation of the uterus and ovaries in planes that ... a special study usually done to provide detailed evaluation of the prostate gland, involves inserting a specialized ...

  9. Ultrasound -- Pelvis

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    Full Text Available ... the examination process. To ensure a smooth experience, it often helps to explain the procedure to the ... on the amplitude (loudness), frequency (pitch) and time it takes for the ultrasound signal to return from ...

  10. Prostate Ultrasound

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    Full Text Available ... difficulty urinating or an elevated blood test result. It’s also used to investigate a nodule found during ... difficulty urinating. Because ultrasound provides real-time images, it also can be used to guide procedures such ...

  11. Prostate Ultrasound

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    Full Text Available ... needle biopsies and fluid aspiration. Risks For standard diagnostic ultrasound , there are no known harmful effects on ... and Resources RTAnswers.org Radiation Therapy for Prostate Cancer top of page This page was reviewed on ...

  12. Ultrasound -- Pelvis

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    Full Text Available ... sexes without x-ray exposure. Risks For standard diagnostic ultrasound , there are no known harmful effects on ... and Resources RTAnswers.org Radiation Therapy for Gynecologic Cancers Radiation Therapy for Prostate Cancer top of page ...

  13. Prostate Ultrasound

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    Full Text Available ... rectum. top of page What are some common uses of the procedure? A transrectal ultrasound of the ... is done because a potential abnormality needs further evaluation with additional views or a special imaging technique. ...

  14. Ultrasound -- Pelvis

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    Full Text Available ... legs, neck and/or brain (in infants and children) or within various body organs such as the ... tumors other disorders of the urinary bladder In children, pelvic ultrasound can help evaluate: pelvic masses pelvic ...

  15. Ultrasound -- Pelvis

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    Full Text Available ... uterus). Sonohysterography allows for a more in-depth investigation of the uterine cavity . Three-dimensional (3-D) ... to-use and less expensive than other imaging methods. Ultrasound imaging is extremely safe and does not ...

  16. Ultrasound -- Pelvis

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    Full Text Available ... is Pelvic Ultrasound Imaging? What are some common uses of the procedure? How should I prepare? What does the equipment look like? How does the procedure work? How is the procedure performed? What will I ...

  17. Ultrasound -- Pelvis

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    Full Text Available ... quickly. The ultrasound exam room may have a television. Feel free to ask for your child's favorite ... display screen that looks like a computer or television monitor. The image is created based on the ...

  18. Prostate Ultrasound

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    Full Text Available ... Images related to Ultrasound - Prostate Sponsored by Please note RadiologyInfo.org is not a medical facility. Please ... is further reviewed by committees from the American College of Radiology (ACR) and the Radiological Society of ...

  19. Ultrasound -- Pelvis

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    Full Text Available ... Images related to Ultrasound - Pelvis Sponsored by Please note RadiologyInfo.org is not a medical facility. Please ... is further reviewed by committees from the American College of Radiology (ACR) and the Radiological Society of ...

  20. Ultrasound -- Pelvis

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    Full Text Available ... symptoms experienced by women such as: pelvic pain abnormal vaginal bleeding other menstrual problems Ultrasound exams also ... endometrial polyps fibroids cancer, especially in patients with abnormal uterine bleeding Some physicians also use 3-D ...

  1. Ultrasound -- Pelvis

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    Full Text Available ... The ultrasound exam room may have a television. Feel free to ask for your child's favorite channel. ... performed over an area of tenderness, you may feel pressure or minor pain from the transducer. Once ...

  2. Prostate Ultrasound

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    Full Text Available ... also known as benign prostatic hyperplasia (BPH) , with measurements acquired as needed for any treatment planning. detect ... areas of the body while other areas, especially air-filled lungs, are poorly suited for ultrasound. For ...

  3. Ultrasound -- Pelvis

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    Full Text Available ... ovarian cysts and uterine fibroids ovarian or uterine cancers A transvaginal ultrasound is usually performed to view ... detect: uterine anomalies uterine scars endometrial polyps fibroids cancer, especially in patients with abnormal uterine bleeding Some ...

  4. Prostate Ultrasound

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    Full Text Available ... rectum. top of page What are some common uses of the procedure? A transrectal ultrasound of the ... community, you can search the ACR-accredited facilities database . This website does not provide cost information. The ...

  5. Ultrasound -- Pelvis

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    Full Text Available ... kidneys. top of page What are some common uses of the procedure? In women, a pelvic ultrasound ... community, you can search the ACR-accredited facilities database . This website does not provide cost information. The ...

  6. Ultrasound -- Pelvis

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    Full Text Available ... of the reflected sound waves (called the Doppler effect). A computer collects and processes the sounds and ... standard diagnostic ultrasound , there are no known harmful effects on humans. top of page What are the ...

  7. Ultrasound -- Pelvis

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    Full Text Available ... sends out high-frequency sound waves (that the human ear cannot hear) into the body and then ... ultrasound , there are no known harmful effects on humans. top of page What are the limitations of ...

  8. Ultrasound -- Pelvis

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    Full Text Available ... various body organs such as the liver or kidneys. top of page What are some common uses ... women, a pelvic ultrasound exam can help identify: kidney stones bladder tumors other disorders of the urinary ...

  9. Ultrasound -- Pelvis

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    Full Text Available ... the ovaries. Transvaginal ultrasound also evaluates the myometrium (muscular walls of the uterus). Sonohysterography allows for a ... and evaluate a variety of urinary and reproductive system disorders in both sexes without x-ray exposure. ...

  10. Prostate Ultrasound

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    Full Text Available ... echoes from the tissues in the body. The principles are similar to sonar used by boats and ... work? Ultrasound imaging is based on the same principles involved in the sonar used by bats, ships ...

  11. Ultrasound -- Pelvis

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    Full Text Available ... echoes from the tissues in the body. The principles are similar to sonar used by boats and ... work? Ultrasound imaging is based on the same principles involved in the sonar used by bats, ships ...

  12. Prostate Ultrasound

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    Full Text Available ... is at high risk for cancer. In this case, a biopsy is performed and an ultrasound probe ... will share the results with you. In some cases, the radiologist may discuss results with you at ...

  13. Ultrasound -- Pelvis

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    Full Text Available ... ovaries. Transvaginal ultrasound also evaluates the myometrium (muscular walls of the uterus). Sonohysterography allows for a more ... needle insertion) is usually minimal because the rectal wall is relatively insensitive to the pain in the ...

  14. Prostate Ultrasound

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    Full Text Available ... uses sound waves to produce pictures of a man’s prostate gland and to help diagnose symptoms such ... also called transrectal ultrasound, provides images of a man's prostate gland and surrounding tissue. The exam typically ...

  15. Ultrasound -- Pelvis

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    Full Text Available ... pain ambiguous genitalia and anomalies of pelvic organs early or delayed puberty in girls Pelvic ultrasound is ... sensitive to motion, and an active or crying child can prolong the examination process. To ensure a ...

  16. Ultrasound -- Pelvis

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    Full Text Available ... consist of a console containing a computer and electronics, a video display screen and a transducer that ... the preferred imaging modality for the diagnosis and monitoring of pregnant women and their unborn babies. Ultrasound ...

  17. Ultrasound -- Pelvis

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    Full Text Available ... insertion. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... the transducer is pressed against the skin, it directs small pulses of inaudible, high-frequency sound waves ...

  18. Prostate Ultrasound

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    Full Text Available ... gel. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... the transducer is pressed against the skin, it directs small pulses of inaudible, high-frequency sound waves ...

  19. Efficiency comparison of 3 kinds of arterial puncture closing devices

    International Nuclear Information System (INIS)

    Feng Xiaodi; Jin Xian; Chen Yueguang; Xiao Hongbing; Yu Qiang; Chen Chengjun; Zhang Dadong

    2007-01-01

    Objective: To evaluate the efficiencies of arterial puncture closing devices (APCDs) including Angioseal, Perclose and Boomerang in patients undergone coronary angiography or percutaneous vascular interventions. Methods: 1497 patients underwent cardiac catheterization procedures were divided into manual compression group(639 cases) and APCDs closure group (576 cases with Angioseal, 151 cases Perclose and 11.3 cases of Boomerang). The times of maneuver, hemorrhage complication and other rare complications were assessed, recorded and compared. Results: The times for maneuver of standard manual compression group, Angioseal group, Perclose group and Boomerang group were (21.4±2.7) h, (3.5±2.3) h, (3.7± 2.6) h and (3.9±2.8) h respectively. The APCDs could obviously reduce bed rest time in comparing to that of manual compression. The rates of failure of the operations were 2.7%, 1.4%, 8.6% and 3.5% (P =0.006, P<0.001); and the rates of hemorrhage were 9.2%, 5.8%, 12.6% and 8.0% respectively for each of the four mentioned groups (P=0.005). Except the failure operations, the incidence of hemorrhage complications among the groups showed no significant differences. Conclusion: Application of APCDs to close the puncture site can significantly reduce the bed rest time, but not the incidence of hemorrhage complications. (authors)

  20. Endobronchial ultrasound elastography: a new method in endobronchial ultrasound-guided transbronchial needle aspiration.

    Science.gov (United States)

    Jiang, Jun-Hong; Turner, J Francis; Huang, Jian-An

    2015-12-01

    TBNA through the flexible bronchoscope is a 37-year-old technology that utilizes a TBNA needle to puncture the bronchial wall and obtain specimens of peribronchial and mediastinal lesions through the flexible bronchoscope for the diagnosis of benign and malignant diseases in the mediastinum and lung. Since 2002, the Olympus Company developed the first generation ultrasound equipment for use in the airway, initially utilizing an ultrasound probe introduced through the working channel followed by incoroporation of a fixed linear ultrasound array at the distal tip of the bronchoscope. This new bronchoscope equipped with a convex type ultrasound probe on the tip was subsequently introduced into clinical practice. The convex probe (CP)-EBUS allows real-time endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) of mediastinal and hilar lymph nodes. EBUS-TBNA is a minimally invasive procedure performed under local anesthesia that has been shown to have a high sensitivity and diagnostic yield for lymph node staging of lung cancer. In 10 years of EBUS development, the Olympus Company developed the second generation EBUS bronchoscope (BF-UC260FW) with the ultrasound image processor (EU-M1), and in 2013 introduced a new ultrasound image processor (EU-M2) into clinical practice. FUJI company has also developed a curvilinear array endobronchial ultrasound bronchoscope (EB-530 US) that makes it easier for the operator to master the operation of the ultrasonic bronchoscope. Also, the new thin convex probe endobronchial ultrasound bronchoscope (TCP-EBUS) is able to visualize one to three bifurcations distal to the current CP-EBUS. The emergence of EBUS-TBNA has also been accompanied by innovation in EBUS instruments. EBUS elastography is, then, a new technique for describing the compliance of structures during EBUS, which may be of use in the determination of metastasis to the mediastinal and hilar lymph nodes. This article describes these new EBUS

  1. Cranial Ultrasound/Head Ultrasound

    Science.gov (United States)

    ... used to screen for brain conditions associated with prematurity, such as bleeding or brain tissue damage as ... or crying child will slow the examination process. Large patients are more difficult to image by ultrasound, ...

  2. The comparative study of CT guided and ultrasound guided percutaneous ethanol injection in the treatment of intra-abdominal cyst

    International Nuclear Information System (INIS)

    Li Heping; Yang Jianyong; Chen Wei; Zhuang Wenquan; Huang Yulian; Chen Jianye

    2005-01-01

    Objective: An comparative study of the interventional approach of CT guided and ultiasound guided percutaneous ethanol injection(PEI) in the treatment of intra-abdominal cyst. Methods: CT guided PEI was performed in the treatment of intra-abdominal cyst in 38 patients while ultrasound guided PEI was performed in 45 cases. Results: The puncture procedure of CT guided PEI was totally performed 83 times in treating 56 intra-abdominal cysts in 38 patients and CT guided PEI was unsuccessful in 6 patients. The puncture procedure of ultrasound guided PEI were performed 87 times in treating 71 intra-abdominal cysts in 55 patients and ultrasound guided PEI only failed only in 1 patient. Conclusion: Ultrasound guided PEI is superior to CT guided PEI in the treatment of intra-abdominal cyst. (authors)

  3. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... guide biopsy of breast cancer ( see the Ultrasound-Guided Breast Biopsy page . diagnose a variety of heart ... Articles and Media Angioplasty and Vascular Stenting Ultrasound-Guided Breast Biopsy Obstetric Ultrasound Ultrasound - Prostate Biopsies - Overview ...

  4. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... of an ultrasound examination. Doppler ultrasound , also called color Doppler ultrasonography, is a special ultrasound technique that ... kidneys. There are three types of Doppler ultrasound: Color Doppler uses a computer to convert Doppler measurements ...

  5. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... Index A-Z General Ultrasound Ultrasound imaging uses sound waves to produce pictures of the inside of ... pictures of the inside of the body using sound waves. Ultrasound imaging, also called ultrasound scanning or ...

  6. General Ultrasound Imaging

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    Full Text Available ... those sound waves to create an image. Ultrasound examinations do not use ionizing radiation (as used in ... ultrasound study may be part of an ultrasound examination. Doppler ultrasound , also called color Doppler ultrasonography, is ...

  7. General Ultrasound Imaging

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    Full Text Available ... What are the limitations of General Ultrasound Imaging? What is General Ultrasound Imaging? Ultrasound is safe and ... be heard with every heartbeat. top of page What are some common uses of the procedure? Ultrasound ...

  8. Fetal Urinary Tract Anomalies: Review of Pathophysiology, Imaging, and Management.

    Science.gov (United States)

    Mileto, Achille; Itani, Malak; Katz, Douglas S; Siebert, Joseph R; Dighe, Manjiri K; Dubinsky, Theodore J; Moshiri, Mariam

    2018-05-01

    Common fetal anomalies of the kidneys and urinary tract encompass a complex spectrum of abnormalities that can be detected prenatally by ultrasound. Common fetal anomalies of the kidneys and urinary tract can affect amniotic fluid volume production with the development of oligohydramnios or anhydramnios, resulting in fetal pulmonary hypoplasia and, potentially, abnormal development of other fetal structures. We provide an overview of common fetal anomalies of the kidneys and urinary tract with an emphasis on sonographic patterns as well as pathologic and postnatal correlation, along with brief recommendations for postnatal management. Of note, we render an updated classification of fetal abnormalities of the kidneys and urinary tract based on the presence or absence of associated urinary tract dilation. In addition, we review the 2014 classification of urinary tract dilation based on the Linthicum multidisciplinary consensus panel.

  9. Clinical application of CT-guided percutaneous puncturing biopsy of subcarinal lymph node

    International Nuclear Information System (INIS)

    Yuan Xiaodong; Wang Jianhua; Zuo Changjing; Tian Jianming

    2011-01-01

    Objective: To discuss the safety and clinical significance of CT-guided percutaneous puncturing biopsy of subcarinal lymph node. Methods: During the period of July 2006-July 2010, CT-guided percutaneous puncturing biopsy of subcarinal lymph node was carried out in 17 patients (11 males and 6 females, with an average age of 54 years) with enlarged subcarinal lymph nodes. The clinical data were retrospectively analyzed. Immediately after the puncturing procedure was completed, CT scanning was performed to observe if there any complications and to evaluate the safety of puncturing biopsy. Biopsy specimens were sent for pathological examination to assess the puncturing accuracy and to make the pathologic diagnosis. The clinical usefulness of this technique was evaluated. Results: Of the total 17 cases, successful puncturing into the enlarged subcarinal lymph nodes with single procedure was achieved in 14 and sufficient tissue sample was obtained. The biopsy failed in three cases at initial puncturing procedure as the needle could not be placed into the enlarged subcarinal lymph nodes, the puncturing biopsy had to given up in two patients because of hemoptysis and in another patient the second puncturing biopsy performed one week later was successful. The total technical successful rate was 88.2% (15/17). Of the fifteen cases with successful puncturing, definitive pathological diagnosis was obtained in 13 and the diagnosis was uncertain in the remaining two, with a diagnosis positive rate of 86.7% (13/15). Pathologically, the diagnoses included metastatic lymphadenopathy from lung cancer (n=10), proliferative inflammatory lymphadenopathy (n=2) and tuberculous enlargement of lymph nodes (n=1). Complications occurred in 4 patients (23.5%, 4/17), which mainly were pneumothorax and pulmonary hemorrhage. Conclusion: With high successful rate and diagnostic accuracy, CT-guided percutaneous puncturing biopsy of subcarinal lymph node is a safe and effective technique if the

  10. Diagnostic imaging of the kidney and the urinary tract in infancy

    International Nuclear Information System (INIS)

    Troeger, J.; Darge, K.; Rohrschneider, W.

    1999-01-01

    Imaging flow charts differ in pediatric and general radiology. The reasons are: Different illnesses, different consequences arising out of imaging results and different sequence of imaging methods. Ultrasound is always the first imaging method of the urinary tract in infancy and childhood starts with ultrasound with the exception of severe abdominal trauma which is investigated by computertomography. The decision 'normal or abnormal' is possible using ultrasound in the most pediatric cases. The diagnostic value and significance of ultrasound in infancy and childhood is far better than in general radiology because of the higher resolution of the high-frequency units taken. The result of the ultrasound examination should be the basis for the following imaging procedures. We will describe diagnostic flow charts starting with three important clinical symptoms: Prenatal pathology, urinary tract obstruction and urinary tract infection. (orig.) [de

  11. Gastrointestinal tract

    International Nuclear Information System (INIS)

    James, R.D.; Pointon, R.C.S.

    1985-01-01

    At the time of writing, radiotherapy is of only minor use in the management of adenocarcinoma of the gastrointestinal tract, for a number of reasons. First, an exploratory laparotomy is generally needed for diagnosis, and if possible the tumour is resected or by-passed. Second, radiotherapy planning in the upper abdomen is complicated by the proximity of small bowel, kidneys, and spinal cord. Third, it has been assumed that these tumours cause death largely as a result of distant metastases, so that local radiotherapy, even if effective, would contribute little to survival. The continued interest in radiotherapy for this group of tumours arises out of the poor survival rates following surgery, which have not changed for many years, and the morbidity associated with their resection. It was hoped that the addition of cytotoxic agents to radical surgery would improve survival rates in carcinoma of the stomach and intraperitoneal colon. Despite a large number of well-organised prospective trials, using a variety of cytotoxic drugs, there is so far no evidence that the addition of chemotherapy to radical surgery improves survival for either tumour site. The authors are therefore faced with a group of tumours which are not only common, but commonly fatal and many surgeons would accept that a new approach using modern radiotherapy techniques may well be justified. There is evidence that this movement is already taking place for carcinoma of the rectum, and the indications for radiotherapy in this condition will be dealt with below. Before considering these it is worth dwelling briefly on recent changes in surgical and radiological practices which, if they fulfil expectations, might allow radiotherapy to be used for carcinoma of the colon, stomach, and pancreas as it is now used for rectal cancer

  12. Therapeutic ultrasound

    International Nuclear Information System (INIS)

    Crum, Lawrence A

    2004-01-01

    The use of ultrasound in medicine is now quite commonplace, especially with the recent introduction of small, portable and relatively inexpensive, hand-held diagnostic imaging devices. Moreover, ultrasound has expanded beyond the imaging realm, with methods and applications extending to novel therapeutic and surgical uses. These applications broadly include: tissue ablation, acoustocautery, lipoplasty, site-specific and ultrasound mediated drug activity, extracorporeal lithotripsy, and the enhancement of natural physiological functions such as wound healing and tissue regeneration. A particularly attractive aspect of this technology is that diagnostic and therapeutic systems can be combined to produce totally non-invasive, imageguided therapy. This general lecture will review a number of these exciting new applications of ultrasound and address some of the basic scientific questions and future challenges in developing these methods and technologies for general use in our society. We shall particularly emphasize the use of High Intensity Focused Ultrasound (HIFU) in the treatment of benign and malignant tumors as well as the introduction of acoustic hemostasis, especially in organs which are difficult to treat using conventional medical and surgical techniques. (amum lecture)

  13. Renal scintigraphy in children with first febrile urinary tract infection

    International Nuclear Information System (INIS)

    Duarte Perez, Maria Caridad; Guillen Dosal, Ana; Martinez Silva, Magaly; Hernandez Robledo, Ernesto

    2012-01-01

    The urinary tract infection is one of the most frequent bacterial infections in the childhood. Two hundred eleven children diagnosed as first febrile urinary tract infection patients were studied and performed Tc-DMSA renal scintigraphy in the acute phase of infection. The results were correlated to the duration and intensity of the fever before the diagnosis, to the acute phase reactants (hemogram, erythrosedimentation and reactive-C protein) and to the results of imaging studies (renal ultrasound and mictional uretrocystography)

  14. Assessment of Residents Readiness to Perform Lumbar Puncture

    DEFF Research Database (Denmark)

    Henriksen, Mikael Johannes Vuokko; Wienecke, Troels; Thagesen, Helle

    2017-01-01

    and 18 novices performing the procedure in a simulated, ward-like setting with a standardized patient. Procedural performance was assessed by three content experts. We used generalizability theory to explore reliability. The discriminative ability of the tool was explored by comparing performance scores......Background: Lumbar puncture is a common procedure in many specialties. The procedure serves to diagnose life-threatening conditions, often requiring rapid performance. However, junior doctors possess uncertainties regarding performing the procedure and frequently perform below expectations. Hence...... between the two groups. The contrasting groups method was used to set a pass/fail standard and the consequences of this was explored. Key results: The interviews identified that in addition to the technical aspects of the procedure, non-technical elements involving planning and conducting the procedure...

  15. There is room for improvement in the prevention and treatment of headache after lumbar puncture

    DEFF Research Database (Denmark)

    Stendell, Line; Fomsgaard, Jonna S; Olsen, Karsten S

    2012-01-01

    The incidence of post dural puncture headache (PDPH) after lumbar puncture (LP) can be reduced from 36% to 0-9% by use of an atraumatic needle size 24 gauge (G)/0.56 mm rather than a traumatic needle size 22 G/0.7 mm. The evidence supporting some of the prophylactic and therapeutically treatments...

  16. Transforaminal Lumbar Puncture: An Alternative Technique in Patients with Challenging Access.

    Science.gov (United States)

    Nascene, D R; Ozutemiz, C; Estby, H; McKinney, A M; Rykken, J B

    2018-05-01

    Interlaminar lumbar puncture and cervical puncture may not be ideal in all circumstances. Recently, we have used a transforaminal approach in selected situations. Between May 2016 and December 2017, twenty-six transforaminal lumbar punctures were performed in 9 patients (25 CT-guided, 1 fluoroscopy-guided). Seven had spinal muscular atrophy and were referred for intrathecal nusinersen administration. In 2, CT myelography was performed via transforaminal lumbar puncture. The lumbar posterior elements were completely fused in 8, and there was an overlying abscess in 1. The L1-2 level was used in 2; the L2-3 level, in 10; the L3-4 level, in 12; and the L4-5 level, in 2 procedures. Post-lumbar puncture headache was observed on 4 occasions, which resolved without blood patching. One patient felt heat and pain at the injection site that resolved spontaneously within hours. One patient had radicular pain that resolved with conservative treatment. Transforaminal lumbar puncture may become an effective alternative to classic interlaminar lumbar puncture or cervical puncture. © 2018 by American Journal of Neuroradiology.

  17. Quasi-static puncture resistance behaviors of high-strength polyester fabric for soft body armor

    Directory of Open Access Journals (Sweden)

    Qiu-Shi Wang

    Full Text Available A series of economical and flexible fabrics were prepared using high-strength polyester yarns with different fabric structures, weft density and number of layers. The effect of these factors on quasi-static puncture resistance was comparatively studied. The failure mode of the fabrics was analyzed with SEM photographs. Findings indicate that the structure and the weft density affected the quasi-static puncture resistance property of the fabrics, the plain fabrics had better puncture resistance property than twill and satin fabrics. The max puncture force and puncture energy of the plain fabrics with 160 yarn/10 cm reached the max values which were 107.43 N and 0.44 J, respectively. The number of layers had a linear relationship to quasi-static puncture resistance. The contact pressure and friction of the probe against the fibers were the main hindrance during the quasi-static puncture process and the breakage of the fibers during the penetration was caused by the bend and tensile deformation. Keywords: High-strength polyester fabrics, Fabric structure, Multiple-layer fabrics, Quasi-static puncture resistance

  18. Unintentional arterial puncture during cephalic vein cannulation: case report and anatomical study

    NARCIS (Netherlands)

    Lirk, P.; Keller, C.; Colvin, J.; Colvin, H.; Rieder, J.; Maurer, H.; Moriggl, B.

    2004-01-01

    The cephalic antebrachial vein is often used for venous access. However, superficial radial arteries of the forearm are known and unintentional arterial puncture can result from attempts to cannulate the lateral veins of the arm. Accidental puncture of a superficial radial artery during peripheral

  19. Analysis of the indications for routine lumbar puncture and results of ...

    African Journals Online (AJOL)

    Lumbar puncture (LP) is an important diagnostic tool for investigating neurological conditions/diseases. This study was carried out to compare the indications for lumbar puncture and findings of cerebrospinal fluid examination in children admitted to Muhimbili National Hospital (MNH) in Dar-es-salaam, Tanzania and Kilifi ...

  20. 40 CFR Table 3 to Subpart Xxxx of... - Emission Limits for Puncture Sealant Application Affected Sources

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 12 2010-07-01 2010-07-01 true Emission Limits for Puncture Sealant Application Affected Sources 3 Table 3 to Subpart XXXX of Part 63 Protection of Environment ENVIRONMENTAL... Manufacturing Pt. 63, Subpt. XXXX, Table 3 Table 3 to Subpart XXXX of Part 63—Emission Limits for Puncture...

  1. 40 CFR Table 4 to Subpart Xxxx of... - Operating Limits for Puncture Sealant Application Control Devices

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 12 2010-07-01 2010-07-01 true Operating Limits for Puncture Sealant Application Control Devices 4 Table 4 to Subpart XXXX of Part 63 Protection of Environment ENVIRONMENTAL... Manufacturing Pt. 63, Subpt. XXXX, Table 4 Table 4 to Subpart XXXX of Part 63—Operating Limits for Puncture...

  2. Technological advances and changing indications for lumbar puncture in neurological disorders

    NARCIS (Netherlands)

    Costerus, Joost M.; Brouwer, Matthijs C.; van de Beek, Diederik

    2018-01-01

    Technological advances have changed the indications for and the way in which lumbar puncture is done. Suspected CNS infection remains the most common indication for lumbar puncture, but new molecular techniques have broadened CSF analysis indications, such as the determination of neuronal

  3. Prestrain-induced Reduction in Skin Tissue Puncture Force of Microneedle

    International Nuclear Information System (INIS)

    Kim, Jonghun; Park, Sungmin; Nam, Gyungmok; Yoon, Sang-Hee

    2016-01-01

    Despite all the recent advances in biodegradable material-based microneedles, the bending and failure (especially buckling) of a biodegradable microneedle during skin tissue insertion remains a major technical hurdle for its large-scale commercialization. A reduction in skin tissue puncture force during microneedle insertion remains an essential issue in successfully developing a biodegradable microneedle. Here, we consider uniaxial and equibiaxial prestrains applied to a skin tissue as mechanophysical stimuli that can reduce the skin tissue puncture force, and investigate the effect of prestrain on the changes in skin tissue puncture force. For a porcine skin tissue similar to that of humans, the skin tissue puncture force of a flat-end microneedle is measured with a z-axis stage equipped with a load cell, which provides a force-time curve during microneedle insertion. The findings of this study lead to a quantitative characterization of the relationship between prestrain and the skin tissue puncture force

  4. Prestrain-induced Reduction in Skin Tissue Puncture Force of Microneedle

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jonghun; Park, Sungmin; Nam, Gyungmok; Yoon, Sang-Hee [Inha Univ., Incheon (Korea, Republic of)

    2016-10-15

    Despite all the recent advances in biodegradable material-based microneedles, the bending and failure (especially buckling) of a biodegradable microneedle during skin tissue insertion remains a major technical hurdle for its large-scale commercialization. A reduction in skin tissue puncture force during microneedle insertion remains an essential issue in successfully developing a biodegradable microneedle. Here, we consider uniaxial and equibiaxial prestrains applied to a skin tissue as mechanophysical stimuli that can reduce the skin tissue puncture force, and investigate the effect of prestrain on the changes in skin tissue puncture force. For a porcine skin tissue similar to that of humans, the skin tissue puncture force of a flat-end microneedle is measured with a z-axis stage equipped with a load cell, which provides a force-time curve during microneedle insertion. The findings of this study lead to a quantitative characterization of the relationship between prestrain and the skin tissue puncture force.

  5. Efficacy and safety in performing of large bore percutaneous nephrostomy under ultrasound guidance

    International Nuclear Information System (INIS)

    Smilov, N.; Mlachkova, D.; Rizov, A.; Lozev, I.

    2009-01-01

    The aim of the study was to compare the success rate, complications and the outcomes from large-bore percutaneous nephrostomy under ultrasound guidance performed to 178 cases with another 54 when nephrostomy under x-ray control was performed. We have performed 178 large-bore percutaneous nephrostomy under ultrasound guidance and another 54 percutaneous nephrostomy under x-ray guidance to patients diagnosed with obstructive uropathy resulting from benign or malignant supravesical obstruction. We have performed successful nephrostomy in 93,8% of the cases under ultrasound guidance and 100% successful nephrostomy in the cases under x-ray control. In 2,8% of patients under ultrasound guidance the nephrostomy was performed using 4 additional punctures of the pyelocaliceal system and artificially caused hydronephrosis via infiltration of normal saline; and in the remaining 1,7% it was successful at the second attempt after 24 hours. It was not necessary to perform open surgery nephrostomy in any of the cases. The performance of percutaneous nephrostomy under ultrasound guidance has a success rate similar to the one done under x-ray guidance and with commensurable frequency and severity of complications, however without the patient and the operator being exposed to x-ray radiation. In general, the percutaneous nephrostomy under ultrasound guidance is performed without difficulties in the cases of third or fourth degree hydronephrosis. The lateral decubital patient position, the appropriate place for the puncture, the usage of Color Doppler imaging when the puncture is performed and the continuos ultrasound guidance during dilatation and placement of the nephrostomy tube should ensure the successful performance of the procedure in the case of first or second degree hydronephrosis. When hydronephrosis is absent, the nephrostomy should be performed under x-ray guidance. In emergency cases the application of ultrasound guidance allows the nephrostomy to be performed along the

  6. Streptococcus pneumoniae urinary tract infection in pedeatrics.

    Science.gov (United States)

    Pougnet, Richard; Sapin, Jeanne; De Parscau, Loïc; Pougnet, Laurence

    2017-06-01

    Streptococcus pneumoniae infections in children are most often lung infections or meningitis. Urinary tract infections are much rarer. We present the case of a urinary tract infection with Streptococcus pneumoniae. The clinical picture was classical. The urine culture showed the presence of Streptococcus pneumoniae in urine (10 4 UFC/mL; with 2 × 10 4 leucocytes/mL). The literature mentions a few cases of such infections. In some studies, the prevalence of Streptococcus pneumoniae in urine of children is less than 1%. Those children mostly present abnormalities of urinary tract. In our case, urinary ultrasound scan have shown the presence of an ectopic kidney in this child. The discussion between the clinician and the biologist has contributed to the discovery of this renal anomaly.

  7. Comparative study of decomposable and indecomposable biopsy needle in lung puncture biopsy

    International Nuclear Information System (INIS)

    Wang Bo; Sheng Zhanxin; Wen Yamin; Zhang Liping; Wen Zongqiu

    2007-01-01

    Objective: To contrast the clinical practice characteristics with decomposable and indecomposable biopsy needle in the CT-guided lung puncture biopsy. Methods: 50 patients with lung tumour carried on puncture biopsy under the CT guidance were divided in two groups randomly: Group A (25 examples): using the indecomposable BioPinceTM biopsy needle; Group B(25 examples): using the decomposable Precisa or Vitesse biopsy needle. The puncture biopsy organization quantity, the first time puncture success rate, the pathological diagnosis result and the incidence of puncture complication were compared in two groups. Results: More striped structures were gained obviously in group A than in group B: 24/25 and 11/25 respectively (P>0.05), The pathological diagnosis 'serious extrusion amoebocyte and nature undetermined' only occurred in group B. But the first time puncture success rate was lower in group A than in B: 52%(13/25) and 80%(20/25) respectively (P>0.05), The incidence of hemorrhage and pneumothorax in group A was higher slightly: 84% and 72%, 16% and 4% respectively (P>0.05). Conclusion: The indecomposable needle (BioPinceTM) was better in lung puncture biopsy, but the lower first time puncture success rate also increases the risk of operation and complication in some degree because of the structure of the needle. On the contrary, decomposable needle (the Precisa or the Vitesse) was not the best choice in lung puncture biopsy. But it had the original superiority, especially regarding the special patient such as patient with small tumour, thin thoracic wall, bad physique for its nimble operation. It is essential for us to use the two different types of biopsy needle rationally to enhance the level of CT-guided lung puncture biopsy. (authors)

  8. Prostate Ultrasound

    Medline Plus

    Full Text Available ... the prostate. help diagnose the cause of a man's infertility. A transrectal ultrasound of the prostate gland is typically used to help diagnose symptoms such as: a nodule felt by a physician during a routine physical exam or prostate cancer screening exam. an elevated ...

  9. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... and Resources RTAnswers.org Radiation Therapy for Gynecologic Cancers Radiation Therapy for Prostate Cancer top of page This page was reviewed on ... with caption Pediatric Content Some imaging tests and treatments have special pediatric considerations. ... Images related to Ultrasound - Pelvis Sponsored by Please ...

  10. Prostate Ultrasound

    Medline Plus

    Full Text Available ... body tissue through which the sound travels. A small amount of gel is put on the skin to allow the sound waves to travel from the transducer to the examined area within the body and then back again. Ultrasound ...

  11. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... body tissue through which the sound travels. A small amount of gel is put on the skin to allow the sound waves to travel from the transducer to the examined area within the body and then back again. Ultrasound ...

  12. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... ultrasound exams are also used to monitor the health and development of an embryo or fetus during pregnancy. See the ... can help to identify and evaluate a variety of urinary and reproductive system disorders in both sexes without x-ray exposure. ...

  13. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... of the reflected sound waves (called the Doppler effect). A computer collects and processes the sounds and creates graphs ... Ultrasound provides real-time imaging, making it a good tool for guiding minimally ... known harmful effects on humans. top of page What are the ...

  14. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available Toggle navigation Test/Treatment Patient Type Screening/Wellness Disease/Condition Safety En Español More Info Images/Videos About Us News Physician ... blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. ...

  15. Prostate Ultrasound

    Medline Plus

    Full Text Available ... symptoms such as difficulty urinating or an elevated blood test result. It’s also used to investigate a nodule ... exam or prostate cancer screening exam. an elevated blood test result. difficulty urinating. Because ultrasound provides real-time ...

  16. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... in which needles are used to extract a sample of cells from organs for laboratory testing. Doppler ultrasound images can help the physician to see and evaluate: blockages to blood flow (such as clots) narrowing of vessels tumors ...

  17. Prostate Ultrasound

    Medline Plus

    Full Text Available ... exam or prostate cancer screening exam. an elevated blood test result. difficulty urinating. Because ultrasound provides real-time images, it also can be used to guide procedures such as needle biopsies , in which a needle is used to sample cells (tissue) from an abnormal area in the ...

  18. Prostate Ultrasound

    Medline Plus

    Full Text Available ... do not use ionizing radiation (as used in x-rays ), thus there is no radiation exposure to the ... tissues that do not show up well on x-ray images. Ultrasound causes no health problems and may ...

  19. Ultrasound -- Pelvis

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    Full Text Available ... do not use ionizing radiation (as used in x-rays ), thus there is no radiation exposure to the ... tissues that do not show up well on x-ray images. Ultrasound is the preferred imaging modality for ...

  20. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... the amplitude (loudness), frequency (pitch) and time it takes for the ultrasound signal to return from the area within the patient that is being examined to the transducer (the device placed on the patient's skin to send and ...

  1. Prostate Ultrasound

    Medline Plus

    Full Text Available ... the amplitude (loudness), frequency (pitch) and time it takes for the ultrasound signal to return from the area within the patient that is being examined to the transducer (the device placed on the patient's skin to send and ...

  2. Ultrasound -- Pelvis

    Medline Plus

    Full Text Available ... the patient. Because ultrasound images are captured in real-time, they can show the structure and movement of ... by a computer, which in turn creates a real-time picture on the monitor. One or more frames ...

  3. Obstetrical ultrasound

    International Nuclear Information System (INIS)

    Bundy, A.L.

    1988-01-01

    The use of diagnostic ultrasound in obstetrics may provide fuel for legal action. While most legal implications of this relatively new imaging modality are purely speculative, some have already given rise to legal action. Several situations will likely provide a basis for the courts to find against the physician. The failure to perform a sonogram when clinically indicated will most likely be the strongest plaintiff argument. Other major concerns include the use and availability of state-of-the-art equipment, as well as interpretation of the scans by a trained physician. Obstetrical ultrasound is usually performed by a radiologist or obstetrician. However, many physicians performing these examinations have had little or no formal training in the field. While this is now being remedied by the respective board examines who require a certain amount of training, it may not be enough. When ultrasound-related cases reach the courts, the involved physicians will most likely be regarded as experts in the field and, therefore, will be held to a very high standard of care. This would be difficult to achieve without formal training. At the present time, the American Board of Radiology requires more training time in ultrasound than the American Board of Obstetrics and Gynecology

  4. Comparison of a novel real-time SonixGPS needle-tracking ultrasound technique with traditional ultrasound for vascular access in a phantom gel model.

    Science.gov (United States)

    Kopac, Daniel S; Chen, Jerry; Tang, Raymond; Sawka, Andrew; Vaghadia, Himat

    2013-09-01

    Ultrasound-guided percutaneous vascular access for endovascular procedures is well established in surgical practice. Despite this, rates of complications from venous and arterial access procedures remain a significant cause of morbidity. We hypothesized that the use of a new technique of vascular access using an ultrasound with a novel needle-guidance positioning system (GPS) would lead to improved success rates of vascular puncture for both in-plane and out-of-plane techniques compared with traditional ultrasound. A prospective, randomized crossover study of medical students from all years of medical school was conducted using a phantom gel model. Each medical student performed three ultrasound-guided punctures with each of the four modalities (in-plane no GPS, in-plane with GPS, out-of-plane no GPS, out-of-plane with GPS) for a total of 12 attempts. The success or failure was judged by the ability to aspirate a simulated blood solution from the model. The time to successful puncture was also recorded. A poststudy validated NASA Task Load Index workload questionnaire was conducted to assess the student's perceptions of the two different techniques. A total of 30 students completed the study. There was no significant difference seen in the mean times of vascular access for each of the modalities. Higher success rates for vascular access using the GPS for both the in-plane (94% vs 91%) and the out-of-plane (86% vs 70%) views were observed; however, this was not statistically significant. The students perceived the mental demand (median 12.0 vs 14.00; P = .035) and effort to be lower (mean 11.25 vs 14.00; P = .044) as well as the performance to be higher (mean 15.50 vs 14.00; P = .041) for the GPS vs the traditional ultrasound-guided technique. Students also perceived their ability to access vessels increased with the aid of the GPS (7.00 vs 6.50; P = .007). The majority of students expressed a preference for GPS (26/30, 87%) as opposed to the traditional counterpart

  5. Puncture mechanics of soft elastomeric membrane with large deformation by rigid cylindrical indenter

    Science.gov (United States)

    Liu, Junjie; Chen, Zhe; Liang, Xueya; Huang, Xiaoqiang; Mao, Guoyong; Hong, Wei; Yu, Honghui; Qu, Shaoxing

    2018-03-01

    Soft elastomeric membrane structures are widely used and commonly found in engineering and biological applications. Puncture is one of the primary failure modes of soft elastomeric membrane at large deformation when indented by rigid objects. In order to investigate the puncture failure mechanism of soft elastomeric membrane with large deformation, we study the deformation and puncture failure of silicone rubber membrane that results from the continuous axisymmetric indentation by cylindrical steel indenters experimentally and analytically. In the experiment, effects of indenter size and the friction between the indenter and the membrane on the deformation and puncture failure of the membrane are investigated. In the analytical study, a model within the framework of nonlinear field theory is developed to describe the large local deformation around the punctured area, as well as to predict the puncture failure of the membrane. The deformed membrane is divided into three parts and the friction contact between the membrane and indenter is modeled by Coulomb friction law. The first invariant of the right Cauchy-Green deformation tensor I1 is adopted to predict the puncture failure of the membrane. The experimental and analytical results agree well. This work provides a guideline in designing reliable soft devices featured with membrane structures, which are present in a wide variety of applications.

  6. Puncture Reduction in Percutaneous Transforaminal Endoscopic Discectomy with HE's Lumbar LOcation (HELLO) System: A Cadaver Study.

    Science.gov (United States)

    Fan, Guoxin; Guan, Xiaofei; Sun, Qi; Hu, Annan; Zhu, Yanjie; Gu, Guangfei; Zhang, Hailong; He, Shisheng

    2015-01-01

    Percutaneous transforaminal endoscopic discectomy (PTED) usually requires numerous punctures under X-ray fluoroscopy. Repeated puncture will lead to more radiation exposure and reduce the beginners' confidence. This cadaver study aimed to investigate the efficacy of HE's Lumbar Location (HELLO) system in puncture reduction of PTED. Cadaver study. Comparative groups. HELLO system consists of self-made surface locator and puncture locator. One senior surgeon conducted the puncture procedure of PTED on the left side of 20 cadavers at L4/L5 and L5/S1 level with the assistance of HELLO system (Group A). Additionally, the senior surgeon conducted the puncture procedure of PTED on the right side of the cadavers at L4/L5 and L5/S1 level with traditional methods (Group B). On the other hand, an inexperienced surgeon conducted the puncture procedure of PTED on the left side of the cadavers at L4/L5 and L5/S1 level with the assistance of our HELLO system (Group C). At L4/L5 level, there was significant difference in puncture times between Group A and Group B (PHELLO system reduced 39%-45% radiation dosage when comparing Group A and Group B, but there was no significant difference in radiation exposure between Group A and Group C whatever at L4/L5 level or L5/S1 level (P>0.05). There was no difference in location time between Group A and Group B or Group A and Group C either at L4/L5 level or L5/S1 level (P>0.05). Small-sample preclinical study. HELLO system was effective in reducing puncture times, fluoroscopy time and radiation exposure, as well as the difficulty of learning PTED. (2015-RES-127).

  7. Puncture Reduction in Percutaneous Transforaminal Endoscopic Discectomy with HE's Lumbar LOcation (HELLO System: A Cadaver Study.

    Directory of Open Access Journals (Sweden)

    Guoxin Fan

    Full Text Available Percutaneous transforaminal endoscopic discectomy (PTED usually requires numerous punctures under X-ray fluoroscopy. Repeated puncture will lead to more radiation exposure and reduce the beginners' confidence.This cadaver study aimed to investigate the efficacy of HE's Lumbar Location (HELLO system in puncture reduction of PTED.Cadaver study.Comparative groups.HELLO system consists of self-made surface locator and puncture locator. One senior surgeon conducted the puncture procedure of PTED on the left side of 20 cadavers at L4/L5 and L5/S1 level with the assistance of HELLO system (Group A. Additionally, the senior surgeon conducted the puncture procedure of PTED on the right side of the cadavers at L4/L5 and L5/S1 level with traditional methods (Group B. On the other hand, an inexperienced surgeon conducted the puncture procedure of PTED on the left side of the cadavers at L4/L5 and L5/S1 level with the assistance of our HELLO system (Group C.At L4/L5 level, there was significant difference in puncture times between Group A and Group B (P0.05. There was no difference in location time between Group A and Group B or Group A and Group C either at L4/L5 level or L5/S1 level (P>0.05.Small-sample preclinical study.HELLO system was effective in reducing puncture times, fluoroscopy time and radiation exposure, as well as the difficulty of learning PTED. (2015-RES-127.

  8. The training and learning process of transseptal puncture using a modified technique.

    Science.gov (United States)

    Yao, Yan; Ding, Ligang; Chen, Wensheng; Guo, Jun; Bao, Jingru; Shi, Rui; Huang, Wen; Zhang, Shu; Wong, Tom

    2013-12-01

    As the transseptal (TS) puncture has become an integral part of many types of cardiac interventional procedures, its technique that was initial reported for measurement of left atrial pressure in 1950s, continue to evolve. Our laboratory adopted a modified technique which uses only coronary sinus catheter as the landmark to accomplishing TS punctures under fluoroscopy. The aim of this study is prospectively to evaluate the training and learning process for TS puncture guided by this modified technique. Guided by the training protocol, TS puncture was performed in 120 consecutive patients by three trainees without previous personal experience in TS catheterization and one experienced trainer as a controller. We analysed the following parameters: one puncture success rate, total procedure time, fluoroscopic time, and radiation dose. The learning curve was analysed using curve-fitting methodology. The first attempt at TS crossing was successful in 74 (82%), a second attempt was successful in 11 (12%), and 5 patients failed to puncture the interatrial septal finally. The average starting process time was 4.1 ± 0.8 min, and the estimated mean learning plateau was 1.2 ± 0.2 min. The estimated mean learning rate for process time was 25 ± 3 cases. Important aspects of learning curve can be estimated by fitting inverse curves for TS puncture. The study demonstrated that this technique was a simple, safe, economic, and effective approach for learning of TS puncture. Base on the statistical analysis, approximately 29 TS punctures will be needed for trainee to pass the steepest area of learning curve.

  9. Qualified Census Tracts

    Data.gov (United States)

    Department of Housing and Urban Development — A Qualified Census Tract (QCT) is any census tract (or equivalent geographic area defined by the Census Bureau) in which at least 50% of households have an income...

  10. The closure device for the puncture point of femoral artery: an experiment in vitro

    International Nuclear Information System (INIS)

    Sun Jiantao; Zhang Junfeng; Wu Ke; Wang Yi

    2010-01-01

    Objective: To assess the blocking effects of a new-type closure device for the puncture point of femoral artery in vitro. Methods: An embolic colloidal substance with stable swelling value was embedded in an extracorporeal model which was used as an imitator of femoral artery blood flow velocity. Results: The embolization colloid was not displaced by the imitated blood flow lash, the embolic colloid was firmly attached to the puncture point and no fluid extravasation occurred. Conclusion: This new-type closure device for the puncture point of femoral artery is simple in structure and easy to manipulate with satisfactory blocking results. (authors)

  11. Percutaneous Direct Puncture Embolization with N-butyl-cyanoacrylate for High-flow Priapism

    Energy Technology Data Exchange (ETDEWEB)

    Tokue, Hiroyuki, E-mail: tokue@s2.dion.ne.jp; Shibuya, Kei [Gunma University Hospital, Department of Diagnostic and Interventional Radiology (Japan); Ueno, Hiroyuki [Isesaki Municipal Hospital, Department of Radiology (Japan); Tokue, Azusa; Tsushima, Yoshito [Gunma University Hospital, Department of Diagnostic and Interventional Radiology (Japan)

    2016-09-15

    There are many treatment options in high-flow priapism. Those mentioned most often are watchful waiting, Doppler-guided compression, endovascular highly selective embolization, and surgery. We present a case of high-flow priapism in a 57-year-old man treated by percutaneous direct puncture embolization of a post-traumatic left cavernosal arteriovenous fistula using N-butyl-cyanoacrylate. Erectile function was preserved during a 12-month follow-up. No patients with percutaneous direct puncture embolization for high-flow priapism have been reported previously. Percutaneous direct puncture embolization is a potentially useful and safe method for management of high-flow priapism.

  12. Development of puncture resistance tire tube; Nirinsha no taipankusei kojo cube no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Yamagiwa, T; Nakayama, K; Kiyota, S; Tanaka, A [Honda R and D Co. Ltd., Tokyo (Japan); Makisaka, N

    1997-10-01

    A new tire tube with a puncture resistance function was developed. The tube is a two-chamber structure having an air chamber and a liquid chamber, and the liquid chamber at the crown-side half of the tube is filled with an anti-puncture sealant during a manufacturing process. In a market test, it was confirmed that the number of puncture cases were reduced by 90 % in comparison with conventional tire tubes by using the newly developed tube. This paper describes the structure of the tube and the characteristics of the tube rubber, and the manufacturing process and durability of the tube. 3 refs., 17 figs.

  13. Use of inelastic analysis to determine the response of packages to puncture accidents

    International Nuclear Information System (INIS)

    Ammerman, D.J.; Ludwigsen, J.S.

    1996-01-01

    The accurate analytical determination of the response of radioactive material transportation packages to the hypothetical puncture accident requires inelastic analysis techniques. Use of this improved analysis method recudes the reliance on empirical and approximate methods to determine the safety for puncture accidents. This paper will discuss how inelastic analysis techniques can be used to determine the stresses, strains and deformations resulting from puncture accidents for thin skin materials with different backing materials. A method will be discussed to assure safety for all of these types of packages

  14. Computation of Quantum Bound States on a Singly Punctured Two-Torus

    International Nuclear Information System (INIS)

    Kar-Tim Chan; Zainuddin Hishamuddin; Molladavoudi Saeid

    2013-01-01

    We study a quantum mechanical system on a singly punctured two-torus with bound states described by the Maass waveforms which are eigenfunctions of the hyperbolic Laplace—Beltrami operator. Since the discrete eigenvalues of the Maass cusp form are not known analytically, they are solved numerically using an adapted algorithm of Hejhal and Then to compute Maass cusp forms on the punctured two-torus. We report on the computational results of the lower lying eigenvalues for the punctured two-torus and find that they are doubly-degenerate. We also visualize the eigenstates of selected eigenvalues using GridMathematica

  15. Ultrasound monitoring in cannulation of the internal jugular vein: anatomic and technical considerations.

    Science.gov (United States)

    Docktor, B; So, C B; Saliken, J C; Gray, R R

    1996-06-01

    To examine the effect of variations in anatomic features and operator experience on the success and complication rates of sonographically monitored cannulation of the internal jugular vein. The authors prospectively collected data for ultrasound-monitored cannulation of the internal jugular vein in 150 patients. In all cases the radiologist recorded the side of puncture, the number of passes needed, the number of vein punctures (one or two), whether the walls were opposed during puncture and any complications. For the last 80 patients the following information was also recorded: the distance from the skin to the internal jugular vein, the diameter of the vein with the Valsalva manoeuvre and the location of the vein relative to the carotid artery. All but three of the cannulations were performed by one of three radiologists, all of whom had at least 5 years of experience. Cannulation was successful in all of the patients, and the first pass was successful in 133 (88.7%). These results are better than those of blind placement techniques reported in the literature. The only complications were hematoma and carotid puncture, which both occurred in the same two patients (1.3%). There was no significant difference among the radiologists in the number of passes needed (one-way analysis of variance, p > 0.05). The number of passes was independent of anatomic factors, including depth from skin, vein diameter or relative location. However, significantly more passes were needed for left-side punctures than for right-side punctures (Student t-test, p < 0.05). Real-time ultrasound monitoring is superior to blind techniques in cannulation of the internal jugular vein because of its ease, accuracy and safety. Sonographic real-time monitoring minimizes the impact of anatomic factors on success and complication rates. It is a safe and efficacious approach that should be preferred in the placement of central lines.

  16. Kidneys and Urinary Tract

    Science.gov (United States)

    ... Videos for Educators Search English Español Kidneys and Urinary Tract KidsHealth / For Teens / Kidneys and Urinary Tract What's ... a sign of diabetes . What the Kidneys and Urinary Tract Do Although the two kidneys work together to ...

  17. Genital and Urinary Tract Defects

    Science.gov (United States)

    ... conditions > Genital and urinary tract defects Genital and urinary tract defects E-mail to a friend Please fill ... and extra fluids. What problems can genital and urinary tract defects cause? Genital and urinary tract defects affect ...

  18. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... of page How is the procedure performed? For most ultrasound exams, you will be positioned lying face- ... Ultrasound examinations are painless and easily tolerated by most patients. Ultrasound exams in which the transducer is ...

  19. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... ultrasound. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... modality for the diagnosis and monitoring of pregnant women and their unborn babies. Ultrasound provides real-time ...

  20. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... medical test that helps physicians diagnose and treat medical conditions. Conventional ultrasound displays the images in thin, flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ...

  1. Ultrasound guided supraclavicular block.

    LENUS (Irish Health Repository)

    Hanumanthaiah, Deepak

    2013-09-01

    Ultrasound guided regional anaesthesia is becoming increasingly popular. The supraclavicular block has been transformed by ultrasound guidance into a potentially safe superficial block. We reviewed the techniques of performing supraclavicular block with special focus on ultrasound guidance.

  2. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... D images. A Doppler ultrasound study may be part of an ultrasound examination. Doppler ultrasound , also called ... terms of the distance traveled per unit of time, rather than as a color picture. It can ...

  3. Lymphoma and metastases in the urinary tract

    International Nuclear Information System (INIS)

    Bruneton, J.N.; Drouillard, J.

    1989-01-01

    Kidneys lymphomas are mainly secondary and represent the most frequent localizations in the urinary tract (68%). The appearance most frequently observed with computed tomography (CT) as well as ultrasound is that of multinodular involvement or, less frequently, of contiguous involvement from retroperitoneal adenopathy in an isolate nodular or tumoral form or in an infiltrating form. The lesions are most often bilateral and involve the lymph nodes, the liver and/or the spleen, especially when the tumor is a metastasis. Lymphoma in the excreting cavities of the bladder is much less frequent. The frequent stasis does no allow obtaining satisfactory urograms for the exploration of the ureters, so that antegrade or retrograde pyelography is often necessary. The lesions of the bladder are well demonstrated by ultrasound and CT exploration. The metastases of lymphoma in the urinary tract are most frequently located in the kidneys, and represent the most frequent malignant kidney tumors. They are often non recognized clinically since they occur at late stages in cancer evolution. Their usual appearance with ultrasound and CT is that of multiple solid-type tumors. Metastases in the excreting cavities of the bladder are very rare [fr

  4. Detailed puncture analyses tank cars : analysis of different impactor threats and impact conditions.

    Science.gov (United States)

    2013-03-01

    There has been significant research in recent years to analyze and improve the impact behavior and puncture resistance of railroad tank cars. Much of this research has been performed using detailed nonlinear finite element analyses supported by full ...

  5. The influence of punctural millimeter wave therapy on clinical presentation of patients with essential hypertention

    Directory of Open Access Journals (Sweden)

    Kotenko К.V.

    2013-12-01

    Full Text Available Aim: to estimate the influence of punctural millimeter wave therapy on clinical presentation. Material and methods. This study includes 102 patients with essential hypertension the I and II stage. Patients were divided into three equal groups depending on the method of treatment: some of them received procedures of punctural millimeter wave therapy, some of them received these procedures as the "placebo" and those who had not received specified procedures. Dynamics of clinical symptomatology and condition of eye bottom vessels was estimated. It was shown that addition of punctural millimeter wave therapy in complex therapy of patients with essential hypertension promotes the expressed regress of clinical symptomatology and state normalization the retinal vessels at these patients. Results. Addition of punctural millimeter wave therapy into the complex therapy was shown to lead to pronounced regress of clinical symptoms. Conclusion. The received results allow to recommend this method to be used in clinical practice for treating patients with essential hypertension.

  6. Stenting-plasty with brachial puncture in the treatment of subclavian steal syndrome

    International Nuclear Information System (INIS)

    Chen Quan; Jing Zaiping; Zhao Zhiqing; Feng Xiang; Lu Qingsheng; Mei Zhijun

    2007-01-01

    Objective: To study the clinical effect of stenting-plasty with retrograde brachial puncture for subclavian steal syndrome patients. Methods: To analyze the clinical results of stenting-plasty with retrograde brachial puncture in 15 patients with subclavian steal syndrome. Results: MRA or DSA showed the subclavian arteries with different degrees of stenosis (80%-100%) in all patients. Stenting-plasty with retrograde brachia] puncture was used in all patients. After placement of wall or polmaz stent, the pulse recovered and the syndrome disappeared. Postoperative angiography showed patency of the artery and stent. The patients were followed up for 3-30 months without recurrence of symptoms. Conclusions: Stenting-plasty with retrograde brachial puncture is a rather proper method to treat subclavian steal syndrome with more coincidence to the vascular anatomy, decrease the maneuver trouble and increase the successful rate. (authors)

  7. Closure Using a Surgical Closure Device of Inadvertent Subclavian Artery Punctures During Central Venous Catheter Placement

    International Nuclear Information System (INIS)

    Berlet, Matthew H.; Steffen, Diana; Shaughness, George; Hanner, James

    2001-01-01

    Severe complications can and do occur when central venous catheters are inadvertently placed into subclavian arteries. Two cases are discussed that describe how these inadvertent arterial punctures can be closed using the Perclose device (Abbott Laboratories, Redwood City, CA, USA)

  8. Antenatal hydronephrosis: Negative predictive value of normal postnatal ultrasound - a 5-year study

    Energy Technology Data Exchange (ETDEWEB)

    Moorthy, I.; Joshi, N.; Cook, J.V. E-mail: jcook@epsom-sthelier.nhs.uk; Warren, M

    2003-12-01

    AIM: To determine whether normal postnatal ultrasound, as part of a strict screening protocol for the detection and follow-up of antenatal hydronephrosis, effectively excludes the majority of babies with congenital urinary tract abnormalities that would otherwise present with a urinary tract infection. MATERIALS AND METHODS: We retrospectively reviewed all babies who had postnatal follow-up of antenatally detected hydronephrosis over a 5-year period at our institution, a district general Trust with a specialist paediatric unit. We then studied all babies presenting with urinary tract infection before their first birthday to our institution over the same period. By cross-referencing these two study groups we were able to determine which babies developed a urinary tract infection having been previously discharged after normal postnatal ultrasound. RESULTS: Four hundred and twenty-five babies had postnatal follow-up of antenatal hydronephrosis. Of these, 284 were investigated with ultrasound alone. In the same 5-year period, 230 babies presented with urinary tract infection before their first birthday. Only three of these babies had been previously discharged after normal postnatal ultrasound. The negative predictive value of a normal postnatal ultrasound was therefore 98.9% (281/284) for babies who subsequently presented with a urinary tract infection before their first birthday. CONCLUSION: Careful antenatal and postnatal ultrasound with strict protocols is effective in detecting congenital renal tract abnormalities. Infants discharged after normal postnatal ultrasound are highly unlikely to still have an undetected urinary tract abnormality. We suggest that all babies with antenatal hydronephrosis are started on prophylactic antibiotics at birth, pending further investigation. All babies without features of severe obstruction antenatally should have their postnatal ultrasound delayed for a month. We recommend selective use of micturating cystourethrogram (MCUG

  9. Antenatal hydronephrosis: Negative predictive value of normal postnatal ultrasound - a 5-year study

    International Nuclear Information System (INIS)

    Moorthy, I.; Joshi, N.; Cook, J.V.; Warren, M.

    2003-01-01

    AIM: To determine whether normal postnatal ultrasound, as part of a strict screening protocol for the detection and follow-up of antenatal hydronephrosis, effectively excludes the majority of babies with congenital urinary tract abnormalities that would otherwise present with a urinary tract infection. MATERIALS AND METHODS: We retrospectively reviewed all babies who had postnatal follow-up of antenatally detected hydronephrosis over a 5-year period at our institution, a district general Trust with a specialist paediatric unit. We then studied all babies presenting with urinary tract infection before their first birthday to our institution over the same period. By cross-referencing these two study groups we were able to determine which babies developed a urinary tract infection having been previously discharged after normal postnatal ultrasound. RESULTS: Four hundred and twenty-five babies had postnatal follow-up of antenatal hydronephrosis. Of these, 284 were investigated with ultrasound alone. In the same 5-year period, 230 babies presented with urinary tract infection before their first birthday. Only three of these babies had been previously discharged after normal postnatal ultrasound. The negative predictive value of a normal postnatal ultrasound was therefore 98.9% (281/284) for babies who subsequently presented with a urinary tract infection before their first birthday. CONCLUSION: Careful antenatal and postnatal ultrasound with strict protocols is effective in detecting congenital renal tract abnormalities. Infants discharged after normal postnatal ultrasound are highly unlikely to still have an undetected urinary tract abnormality. We suggest that all babies with antenatal hydronephrosis are started on prophylactic antibiotics at birth, pending further investigation. All babies without features of severe obstruction antenatally should have their postnatal ultrasound delayed for a month. We recommend selective use of micturating cystourethrogram (MCUG

  10. Transvaginal ultrasound ovarian diathermy: sheep as an experimental model

    Directory of Open Access Journals (Sweden)

    Pimentel Anita M

    2012-01-01

    Full Text Available Abstract Background Some techniques of transvaginal ovarian drilling have been previously described. Nevertheless a monopolar transvaginal ovarian cauterization, that use the expertise and safety of transvaginal puncture for oocyte captation seems to be an easier and feasible approach. The aim of this study was to develop a minimally invasive ovarian cauterization technique under transvaginal ultrasound control, and to evaluate the safety of the transvaginal ovarian monopolar cauterization, female sheep at reproductive age were used as an experimental model. Findings An experimental study was performed in a university research center. Seventeen female sheep (15 Corriedale e 2 Suffolk in reproductive age were submitted to transvaginal ovarian cauterization with a monopolar Valleylab Force 2 electrocautery. Macroscopic and microscopic lesions were assessed. Ovarian size were 1.31 cm2 ± 0,43 (Corriedale and 3.41 cm2 ± 0,64 (Suffolk. From 30 ovaries from Corriedale sheep punctured, only 3 were cauterized, presenting macroscopic and typical microscopic lesion. In the Suffolk sheep group, only one ovary was cauterized. No lesion could be found in the needle path. Conclusions This is the first experimental animal model described for ovarian cauterization needle guided by transvaginal ultrasound. The sheep does not seem to be the ideal animal model to study this technique. Another animal model, whose ovaries are better identified by transvaginal ultrasound should be sought for this technique, theoretically less invasive, before it could be offered safely to women with polycystic ovary syndrome.

  11. Use of a vegetable model as a training tool for PCNL puncture.

    Science.gov (United States)

    Sinha, Maneesh; Krishnamoorthy, Venkatesh

    2015-01-01

    Training residents to perform a PCNL puncture is hampered by the non-availability of a good inanimate model that can be used for demonstration and practice. The ethics of surgical training during actual surgeries is being questioned and the role of simulation is increasingly important. Virtual reality trainers, however, are prohibitively expensive and the use of animal models is fraught with regulatory and ethical concerns. We have devised a model that can be used to teach the concept of depth perception during a PCNL puncture. A bottle gourd was used to mimic the posterior abdominal wall. Cotton pledgets dipped in intravenous contrast were fitted into 4 mm holes made at staggered levels in the bottle gourd which was strapped onto the operating table with the cotton pledgets facing away from the surgeon. Surgeons with varying degrees of experience made fluoroscopy-guided punctures onto the cotton pledgets. We recorded the time taken for puncture in seconds and the distance of the needle exit site from the center of the cotton ball. Speed was measured by recording the fluoroscopy time in seconds on the C-arm. Accuracy was documented by using a Vernier caliper to measure the distance from the edge of the target to the actual puncture. One second of fluoroscopy time and 0.1 mm distance were each given one point. The total points accumulated over a set of 10 punctures was added to give a total score. Longer fluoroscopy times and inaccurate punctures resulted in higher scores. A surgeon with more than 1000 PCNLs to his credit had a score of 99. The average score of five residents was 555. The bottle gourd model provides an ethically acceptable, inexpensive, easy to replicate model that can be used to train residents in the PCNL puncture.

  12. Heme oxygenase-1 modulates degeneration of the intervertebral disc after puncture in Bach 1 deficient mice.

    Science.gov (United States)

    Ohta, Ryo; Tanaka, Nobuhiro; Nakanishi, Kazuyoshi; Kamei, Naosuke; Nakamae, Toshio; Izumi, Bunichiro; Fujioka, Yuki; Ochi, Mitsuo

    2012-09-01

    Intervertebral disc degeneration is considered to be a major feature of low back pain. Furthermore, oxidative stress has been shown to be an important factor in degenerative diseases such as osteoarthritis and is considered a cause of intervertebral disc degeneration. The purpose of this study was to clarify the correlation between oxidative stress and intervertebral disc degeneration using Broad complex-Tramtrack-Bric-a-brac and cap'n'collar homology 1 deficient (Bach 1-/-) mice which highly express heme oxygenase-1 (HO-1). HO-1 protects cells from oxidative stress. Caudal discs of 12-week-old and 1-year-old mice were evaluated as age-related models. Each group and period, 5 mice (a total of 20 mice, a total of 20 discs) were evaluated as age-related model. C9-C10 caudal discs in 12-week-old Bach 1-/- and wild-type mice were punctured using a 29-gauge needle as annulus puncture model. Each group and period, 5 mice (a total of 60 mice, a total of 60 discs) were evaluated. The progress of disc degeneration was evaluated at pre-puncture, 1, 2, 4, 8 and 12 weeks post-puncture. Radiographic, histologic and immunohistologic analysis were performed to compare between Bach 1-/- and wild-type mice. In the age-related model, there were no significant differences between Bach 1-/- and wild-type mice radiologically and histologically. However, in the annulus puncture model, histological scoring revealed significant difference at 8 and 12 weeks post-puncture. The number of HO-1 positive cells was significantly greater in Bach 1-/- mice at every period. The apoptosis rate was significantly lower at 1 and 2 weeks post-puncture in Bach 1-/- mice. Oxidative stress prevention may avoid the degenerative process of the intervertebral disc after puncture, reducing the number of apoptosis cells. High HO-1 expression may also inhibit oxidative stress and delay the process of intervertebral disc degeneration.

  13. Mechanical deformation and glycosaminoglycan content changes in a rabbit annular puncture disc degeneration model.

    Science.gov (United States)

    Chan, Deva D; Khan, Safdar N; Ye, Xiaojing; Curtiss, Shane B; Gupta, Munish C; Klineberg, Eric O; Neu, Corey P

    2011-08-15

    Evaluation of degenerated intervertebral discs from a rabbit annular puncture model by using specialized magnetic resonance imaging (MRI) techniques, including displacement encoding with stimulated echoes and a fast-spin echo (DENSE-FSE) acquisition and delayed gadolinium-enhanced MRI of cartilage (dGEMRIC). To evaluate a rabbit disc degeneration model by using various MRI techniques. To determine the displacements and strains, spin-lattice relaxation time (T1), and glycosaminoglycan (GAG) distribution of degenerated discs as compared to normal and adjacent level discs. Annular puncture of the intervertebral disc produces disc degeneration in rabbits. DENSE-FSE has been previously demonstrated in articular cartilage for the measurement of soft tissue displacements and strains. MRI also can measure the T1 of tissue, and dGEMRIC can quantify GAG concentration in cartilage. METHODS.: In eight New Zealand white rabbits, the annulus fibrosis of a lumbar disc was punctured. After 4 weeks, the punctured and cranially adjacent motion segments were isolated for MRI and histology. MRI was used to estimate the disc volume and map T1. DENSE-FSE was used to determine displacements for the estimation of strains. dGEMRIC was then used to determine GAG distributions. Histology and standard MRI indicated degeneration in punctured discs. Disc volume increased significantly at 4 weeks after the puncture. Displacement of the nucleus pulposus was distinct from that of the annulus fibrosis in most untreated discs but not in punctured discs. T1 was significantly higher and GAG concentration significantly lower in punctured discs compared with untreated adjacent level discs. Noninvasive and quantitative MRI techniques can be used to evaluate the mechanical and biochemical changes that occur with animal models of disc degeneration. DENSE-FSE, dGEMRIC, and similar techniques have potential for evaluating the progression of disc degeneration and the efficacy of treatments.

  14. Laparoscopic Removal of a Large Ovarian Mass Utilizing Planned Trocar Puncture

    OpenAIRE

    Stitely, Michael L.

    2012-01-01

    Background: Large cystic ovarian masses pose technical challenges to the laparoscopic surgeon. Removing large, potentially malignant specimens must be done with care to avoid the leakage of cyst fluid into the abdominal cavity. Case: We present the case of a large ovarian cystic mass treated laparoscopically with intentional trocar puncture of the mass to drain and remove the mass. Discussion: Large cystic ovarian masses can be removed laparoscopically with intentional trocar puncture of the ...

  15. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. Conventional ultrasound displays the images in thin, ...

  16. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... and treat medical conditions. Conventional ultrasound displays the images in thin, flat sections of the body. Advancements in ultrasound technology include three-dimensional (3- ...

  17. Ultrasound guidance versus anatomical landmarks for internal jugular vein catheterization.

    Science.gov (United States)

    Brass, Patrick; Hellmich, Martin; Kolodziej, Laurentius; Schick, Guido; Smith, Andrew F

    2015-01-09

    Central venous catheters (CVCs) can help with diagnosis and treatment of the critically ill. The catheter may be placed in a large vein in the neck (internal jugular vein), upper chest (subclavian vein) or groin (femoral vein). Whilst this is beneficial overall, inserting the catheter risks arterial puncture and other complications and should be performed with as few attempts as possible. Traditionally, anatomical 'landmarks' on the body surface were used to find the correct place in which to insert catheters, but ultrasound imaging is now available. A Doppler mode is sometimes used to supplement plain 'two-dimensional' ultrasound. The primary objective of this review was to evaluate the effectiveness and safety of two-dimensional (imaging ultrasound (US) or ultrasound Doppler (USD)) guided puncture techniques for insertion of central venous catheters via the internal jugular vein in adults and children. We assessed whether there was a difference in complication rates between traditional landmark-guided and any ultrasound-guided central vein puncture.Our secondary objectives were to assess whether the effect differs between US and USD; whether the effect differs between ultrasound used throughout the puncture ('direct') and ultrasound used only to identify and mark the vein before the start of the puncture procedure (indirect'); and whether the effect differs between different groups of patients or between different levels of experience among those inserting the catheters. We searched the Central Register of Controlled Trials (CENTRAL) (2013, Issue 1), MEDLINE (1966 to 15 January 2013), EMBASE (1966 to 15 January 2013), the Cumulative Index to Nursing and Allied Health Literature (CINAHL) (1982 to 15 January 2013 ), reference lists of articles, 'grey literature' and dissertations. An additional handsearch focused on intensive care and anaesthesia journals and abstracts and proceedings of scientific meetings. We attempted to identify unpublished or ongoing studies

  18. Sphenopalatine ganglion block for postdural puncture headache in ambulatory setting

    Directory of Open Access Journals (Sweden)

    José Miguel Cardoso

    Full Text Available Abstract Background and objectives: Postdural puncture headache (PDPH is a common complication following subarachnoid blockade and its incidence varies with the size of the needle used and the needle design. Suportive therapy is the usual initial approach. Epidural blood patch (EBP is the gold-standard when supportive therapy fails but has significant risks associated. Sphenopalatine ganglion block (SPGB may be a safer alternative. Case report: We observed a 41 year-old female patient presenting with PDPH after a subarachnoid blockade a week before. We administrated 1 l of crystalloids, Dexamethasone 4 mg, parecoxib 40 mg, acetaminophen 1 g and caffeine 500 mg without significant relief after 2 hours. We performed a bilateral SPGB with a cotton-tipped applicator saturated with 0.5% Levobupivacaine under standard ASA monitoring. Symptoms relief was reported 5 minutes after the block. The patient was monitored for an hour after which she was discharged and prescribed acetaminophen 1 g and ibuprofen 400 mg every 8 hours for the following 2 days. She was contacted on the next day and again after a week reporting no pain in both situation. Conclusions: SPGB may attenuate cerebral vasodilation induced by parasympathetic stimulation transmitted through neurons that have synapses in the sphenopalatine ganglion. This would be in agreement with the Monro-Kellie concept and would explain why caffeine and sumatriptan can have some effect in the treatment of PDPH. Apparently, SPGB has a faster onset than EBP with better safety profile. We suggest that patients presenting with PDPH should be considered primarily for SPGB. Patients may have a rescue EBP if needed.

  19. Under Utilization of Local Anesthetics in Infant Lumbar Punctures

    Directory of Open Access Journals (Sweden)

    Gorchynski, Julie

    2008-01-01

    Full Text Available Background: Lumbar Puncture (LP is an invasive procedure frequently used to diagnose meningitis among the pediatric population. Neonates and infants have not routinely received local anesthesia prior to LP. Study Objective: To determine whether emergency medicine physicians and pediatricians use local analgesics on neonates and infants prior to performing an LP and to identify which local anesthetics, if any, were used. Methods: Prospective, cohort study of all infants, six months of age or less, that received an LP in the emergency department (ED or inpatient pediatric units for suspected meningitis during a period of year at a university tertiary care hospital. Results: A total sample population of 111 infants that received an LP within the study period. A control population of 42 adults received an LP. Only 40.4% (45/111 of the infants received local analgesia prior to LP: either 1% lidocaine, EMLA or a combination of the two. Infants were less likely to receive lidocaine or EMLA prior to LP compared to adult subjects (OR= 0.27; 95% CI0.12 to 0.62. No neonates that were less than one month of age received local procedural anesthesia by emergency medicine or pediatric physicians. ED physicians’ use of local anesthesia prior to LP increased with increasing age of the infant. The pediatricians in this study used local anesthesia prior to LP when the infant was at least five months of age. Discussion: The data objectively support recent literature regarding the under use or lack of use of analgesia prior to LP among neonates and infants. Local anesthetics should be used routinely without exception prior to performing an LP in the pediatric population.

  20. Conformal blocks on a 2-sphere with indistinguishable punctures and implications on black hole entropy

    Directory of Open Access Journals (Sweden)

    Abhishek Majhi

    2016-11-01

    Full Text Available The dimensionality of the Hilbert space of a Chern–Simons theory on a 3-fold, in the presence of Wilson lines carrying spin representations, had been counted by using its link with the Wess–Zumino theory, with level k, on the 2-sphere with points (to be called punctures marked by the piercing of the corresponding Wilson lines and carrying the respective spin representations. It is shown, in the weak coupling (large k limit, the formula decouples into two characteristically distinct parts; one mimics the dimensionality of the Hilbert space of a collection of non-interacting spin systems and the other is an effective overall correction contributed by all the punctures. The exact formula yield from this counting has been shown earlier to have resulted from the consideration of the punctures to be distinguishable. We investigate the same counting problem by considering the punctures to be indistinguishable. Although the full formula remains undiscovered, nonetheless, we are able to impose the relevant statistics for indistinguishable punctures in the approximate formula resulting from the weak coupling limit. As an implication of this counting, in the context of its relation to that of black hole entropy calculation in quantum geometric approach, we are able to show that the logarithmic area correction, with a coefficient of −3/2, that results in this method of entropy calculation, in independent of whether the punctures are distinguishable or not.

  1. The effect of second-stage pushing and body mass index on postdural puncture headache.

    Science.gov (United States)

    Franz, Amber M; Jia, Shawn Y; Bahnson, Henry T; Goel, Akash; Habib, Ashraf S

    2017-02-01

    To explore how pushing during labor and body mass index affect the development of postdural puncture headache in parturients who experienced dural puncture with Tuohy needles. Retrospective cohort. Obstetric ward and operating rooms at a university-affiliated hospital. One hundred ninety parturients who had witnessed dural puncture with 17 or 18 gauge Tuohy needles from 1999-2014. Patients were categorized by pushing status and body mass index (kg/m 2 ): nonobese push, women who pushed during labor had increased risk of postdural puncture headache (odds ratio [OR], 2.1 [1.1-4.0]; P=.02), more days of headache (P=.02), and increased epidural blood patch placement (P=.02). Super obese patients were less likely to develop headache compared with nonobese (OR, 0.33 [0.13-0.85]; P=.02), obese (OR, 0.37 [0.14-0.98]; P=.045], and morbidly obese patients (OR, 0.20 [0.05-0.68]; Ppushing (OR, 0.57 [0.29-1.10]; P=.096) and super obesity (OR, 0.41 [0.16-1.02]; P=.056] were no longer significantly associated with reduced risk of postdural puncture headache. Parturients who did not push before delivery and parturients with body mass index ≥50kg/m 2 were less likely to develop postdural puncture headache in a univariate analysis. Similar trends were demonstrated in a multivariate model, but were no longer statistically significant. Copyright © 2016 Elsevier Inc. All rights reserved.

  2. Effect of Ultrasound-Guided Placement of Difficult-to-Place Peripheral Venous Catheters

    DEFF Research Database (Denmark)

    Partovi-Deilami, Kohyar; Nielsen, Jesper K.; Møller, Ann M.

    2016-01-01

    operated by nurse anesthetists for these patients. This prospective observational study with a pre/post design focused on inpatients with DIVA referred for PVC placement, a service provided by nurse anesthetists in most Scandinavian hospitals. The rate of success, procedure time, number of skin punctures......) with ultrasound. Procedure time was reduced from 20 to 10 minutes, discomfort was unchanged, and the median number of skin punctures decreased from 3 to 2. The incidence of central venous catheter placement dropped from 34% to 7%. Implementation of a training program and a mobile service in which nurse......, discomfort, catheter size, location, and incidence of central venous catheter placement are reported before and after implementation of a training program and a mobile service using ultrasound to place difficult-to-place PVCs. The success rate increased from 0% (0 of 33 patients) to 83% (58 of 70 patients...

  3. Association between UTI and urinary tract abnormalities: a case-control study in Erbil City/Iraq.

    Science.gov (United States)

    AlKhateeb, N E; Al Azzawi, S; Al Tawil, N G

    2014-12-01

    To determine the proportion of ultrasound abnormalities of the urinary system between two groups of children: affected with urinary tract infection (UTI) and unaffected (control). Further, to determine the most common microorganisms causing UTI in those children with urinary tract abnormalities. A case-control study was carried out in Erbil, Iraq between September and December 2012. Ultrasound examinations were carried out on 64 children affected with UTI and on 64 unaffected with UTI (control) in order to detect differences, in the presence of abnormalities, in the urinary tract between the two groups. A majority (59.4%) of children affected with UTI had ultrasound abnormalities, compared with 26.6% of the control group (PUTI were female, compared with 25% who were male (PUTI were found to have ultrasound abnormalities. E. coli was the most common causative pathogen for children with or without ultrasound abnormalities. Copyright © 2014 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.

  4. Effects caused by the spinal administration of ketamine S (+) 5% with no preservatives, using a single puncture, and located on the spinal cord and meninges in rabbits.

    Science.gov (United States)

    Lima Filho, José Admirço; Fin, Natalia Castro; Valerini, Felipe Gilberto; Machado, Vania Maria; Marques, Mariangela Ester; Miot, Hélio; Lima, Lais Helena Navarro E; Ganen, Eliana Marisa

    2014-07-01

    To evaluate the effect of ketamine S (+) 5% with no preservatives and administered as a subarachnoid single puncture on the spinal cord and meninges of rabbits. Twenty young adult female rabbits, each weighing 3500-5000 g and having a spine length between 34 and 38 cm, were divided by lot into two groups (G): 0.9% saline in G1 and ketamine S (+) 5% in G2, by volume of 5 μg per cm column (0.18 mL). After intravenous anaesthesia with ketamine and xylazine, the subarachnoid space was punctured at S1-S2 under ultrasound guidance, and a random solution was injected. The animals remained in captivity for 21 days under medical observation and were sacrificed by decapitation. The lumbosacral spinal cord portion was removed for immunohistochemistry to assess the glial fibrillary acidic protein (GFAP), and histology was assessed using hematoxylin and eosin (HE) stain. No histological lesions were found in the nervous tissue (roots and cord) or meninges in either group. The ketamine S (+) 5% unpreserved triggered no neurological or histological lesions in the spinal cord or meninges of rabbits.

  5. Vascular ultrasound.

    Science.gov (United States)

    Pilcher, D B; Ricci, M A

    1998-04-01

    Surgeon-interpreted diagnostic ultrasound has become the preferred screening test and often the definitive test for the diagnosis of arterial stenosis, aneurysm, and venous thrombosis. As a modality for surveillance, its noninvasive quality makes it particularly appealing as the test of choice to screen patients for abdominal aortic aneurysms or to perform follow-up examinations on those patients with a carotid endartectomy or in situ bypass grafts. The increasing reliance on intraoperative duplex imaging of vascular procedures demands that the surgeon learn the skills to perform the studies without a technologist or radiologist to interpret the examination.

  6. The blind pushing technique for peripherally inserted central catheter placement through brachial vein puncture.

    Science.gov (United States)

    Lee, Jae Myeong; Cho, Young Kwon; Kim, Han Myun; Song, Myung Gyu; Song, Soon-Young; Yeon, Jae Woo; Yoon, Dae Young; Lee, Sam Yeol

    2018-03-01

    The objective of this study was to conduct a prospective clinical trial evaluating the technical feasibility and short-term clinical outcome of the blind pushing technique for placement of pretrimmed peripherally inserted central catheters (PICCs) through brachial vein access. Patients requiring PICC placement at any of the three participating institutions were prospectively enrolled between January and December 2016. The review boards of all participating institutions approved this study, and informed consent was obtained from all patients. PICC placement was performed using the blind pushing technique and primary brachial vein access. The following data were collected from unified case report forms: access vein, obstacles during PICC advancement, procedure time, and postprocedural complications. During the 12-month study period, 1380 PICCs were placed in 1043 patients. Of these, 1092 PICCs placed in 837 patients were enrolled, with 834 PICCs (76%) and 258 PICCs (34%) placed through brachial vein and nonbrachial vein access, respectively. In both arms, obstacles were most commonly noted in the subclavian veins (n = 220) and axillary veins (n = 94). Successful puncture of the access vein was achieved at first try in 1028 PICCs (94%). The technical success rate was 99%, with 1055 PICCs (97%) placed within 120 seconds of procedure time and 1088 PICCs (99%) having the tip located at the ideal position. Follow-up Doppler ultrasound detected catheter-associated upper extremity deep venous thrombosis (UEDVT) for 18 PICCs in 16 patients and late symptomatic UEDVT for 16 PICCs in 16 patients (3.1%). Catheter-associated UEDVT was noted for 28 PICCs (82%) and 6 PICCs (18%) placed through brachial vein and nonbrachial vein access, respectively. The incidence of obstacles and the procedure time (pushing technique and primary brachial vein access is technically feasible and may represent an alternative to the conventional PICC placement technique, having low incidences of

  7. Endoscopic ultrasound-assisted endoscopic resection of carcinoid tumors of the gastrointestinal tract Resección endoscópica asistida por ecoendoscopia de tumores carcinoides del aparato digestivo

    Directory of Open Access Journals (Sweden)

    D. Martínez-Ares

    2004-12-01

    Full Text Available Introduction: usually found in the gastrointestinal tract, carcinoids are the most frequent neuroendocrine tumors. Most of these lesions are located in areas that are difficult to access using conventional endoscopy (small intestine and appendix; carcinoid tumors found in the gastroduodenal tract and in the large intestine can be studied endoscopically; in these cases, if localized disease is confirmed, local treatment by endoscopic resection may be the treatment of choice. Since endoscopic ultrasonography has been shown to be the technique of choice for the study of tumors exhibiting submucosal growth, the selection of patients who are candidates for a safe and effective local resection should be based on this technique. Patients and method: we selected patients with gastrointestinal carcinoid tumors who were endoscopically treated between 1997 and 2002. Those patients with tumors measuring less than 10 mm, which had not penetrated the muscularis propria, and those with localized disease were considered candidates for endoscopic resection. The endpoints of this study were to assess the effectiveness (complete resection and safety (complications of the technique. Follow-up consisted of eschar biopsies performed one month and twelve months after the resection. Results: during the aforementioned period, we resected endoscopically 24 tumors in 21 patients (mean age: 51.7 years; 71.5% males. Most lesions were incidental discoveries made during examinations indicated for other reasons. Resection was indicated in most cases as a result of the suspected presence of a carcinoid tumor after endoscopic ultrasonography. Endoscopic ultrasonography also enabled us to clearly identify the layer where the lesion had originated, as well as the size of the lesion. The carcinoid tumor was removed in 13 cases (54.2% by using the conventional snare polypectomy technique, in 9 cases (37.5% assisted by a submucosal injection of saline solution and/or adrenaline, and

  8. In-Plane Ultrasound-Guided Knee Injection Through a Lateral Suprapatellar Approach: A Safe Technique.

    Science.gov (United States)

    Chagas-Neto, Francisco A; Taneja, Atul K; Gregio-Junior, Everaldo; Nogueira-Barbosa, Marcello H

    2017-06-01

    This study aims to describe a technique for in-plane ultrasound-guided knee arthrography through a lateral suprapatellar approach, reporting its accuracy and related complications. A retrospective search was performed for computed tomography and magnetic resonance reports from June 2013 through June 2015. Imaging studies, puncture descriptions, and guided-procedure images were reviewed along with clinical and surgical history. A fellowship-trained musculoskeletal radiologist performed all procedures under sterile technique and ultrasound guidance with the probe in oblique position on the lateral suprapatellar recess after local anesthesia with the patient on dorsal decubitus, hip in neutral rotation, and 30 to 45 degrees of knee flexion. A total of 86 consecutive subjects were evaluated (mean, 55 years). All subjects underwent intra-articular injection of contrast, which was successfully reached in the first attempt in 94.2% of the procedures (81/86), and in the second attempt in 5.8% (5/86) after needle repositioning without a second puncture. There were no postprocedural reports of regional complications at the puncture site, such as significant pain, bleeding, or vascular lesions. Our study demonstrates that in-plane ultrasound-guided injection of the knee in semiflexion approaching the lateral suprapatellar recess is a safe and useful technique to administer intra-articular contrast solution, as an alternative method without radiation exposure.

  9. Computer tomography urography assisted real-time ultrasound-guided percutaneous nephrolithotomy on renal calculus.

    Science.gov (United States)

    Fang, You-Qiang; Wu, Jie-Ying; Li, Teng-Cheng; Zheng, Hao-Feng; Liang, Guan-Can; Chen, Yan-Xiong; Hong, Xiao-Bin; Cai, Wei-Zhong; Zang, Zhi-Jun; Di, Jin-Ming

    2017-06-01

    This study aimed to assess the role of pre-designed route on computer tomography urography (CTU) in the ultrasound-guided percutaneous nephrolithotomy (PCNL) for renal calculus.From August 2013 to May 2016, a total of 100 patients diagnosed with complex renal calculus in our hospital were randomly divided into CTU group and control group (without CTU assistance). CTU was used to design a rational route for puncturing in CTU group. Ultrasound was used in both groups to establish a working trace in the operation areas. Patients' perioperative parameters and postoperative complications were recorded.All operations were successfully performed, without transferring to open surgery. Time of channel establishment in CTU group (6.5 ± 4.3 minutes) was shorter than the control group (10.0 ± 6.7 minutes) (P = .002). In addition, there was shorter operation time, lower rates of blood transfusion, secondary operation, and less establishing channels. The incidence of postoperative complications including residual stones, sepsis, severe hemorrhage, and perirenal hematoma was lower in CTU group than in control group.Pre-designing puncture route on CTU images would improve the puncturing accuracy, lessen establishing channels as well as improve the security in the ultrasound-guided PCNL for complex renal calculus, but at the cost of increased radiation exposure.

  10. The intraoperative use of ultrasound facilitates significantly the arthroscopic debridement of calcific rotator cuff tendinitis.

    Science.gov (United States)

    Sabeti, M; Schmidt, M; Ziai, P; Graf, A; Nemecek, E; Schueller-Weidekamm, C

    2014-05-01

    During arthroscopy, the localization of calcific deposit in patients suffering from calcifying tendinitis can be demanding and time consuming, frequently using ionizing radiation. Intraoperative ultrasound has been recently promoted, facilitating deposit localization and reducing radiation dose. In this prospective, randomized, controlled and clinical observer-blinded pilot trial, 20 patients with calcific tendinitis were operated. In group I, the deposit was localized conventionally. In group II, the deposit was localized using intraoperative ultrasound. The needle punctures to detect the deposit and operation times were noted. Patients were postoperatively evaluated after 2 and 6 weeks and 9 months. In group II, the needle punctures to detect the deposit were significantly lower than in group I (p < 0.0001). Operation time to localize the deposit was also significantly less in group II (p < 0.033). In both groups, patients improved significantly with increased shoulder function (p < 0.0001) and decreased pain (p < 0.0001) 2 weeks and 9 months (p < 0.001) after surgery. The difference between the groups was not significant. Excellent radiological findings were obtained in both groups after 9 months. Intraoperative US significantly facilitates the detection of calcific deposits during arthroscopic debridement by speeding up surgery and reducing the number of needle punctures. Hence, we have changed our method of detecting calcific deposits intraoperatively from fluoroscopy to ultrasound.

  11. Aortic intracardiac echocardiography-guided septal puncture during mitral valvuloplasty.

    Science.gov (United States)

    Akkaya, Emre; Vuruskan, Ertan; Zorlu, Ali; Sincer, Isa; Kucukosmanoglu, Mehmet; Ardic, Idris; Yilmaz, Mehmet Birhan

    2014-01-01

    Transoesophageal echocardiography (TEE) and venous intracardiac echocardiography (ICE) are traditionally used to visualize the interatrial septum (IAS) and the tenting effect of the fossa ovalis in patients undergoing percutaneous balloon mitral valvuloplasty (PBMV). The aim of the present study was to assess the comparative efficacy and safety of arterial (intra-aortic) ICE and venous ICE, compared with TEE (traditional approach), in the patients undergoing PBMV. TEE, aortic ICE, and venous ICE were consecutively performed in 50 patients (40 ± 9 years, 86% female). The images of intracardiac structures were obtained from both aortic and right atrial loci. The IAS was visualized using TEE, aortic ICE, and venous ICE. The mean mitral valve area was 1.14 ± 0.2 cm(2), and the mean left atrial volume index was 57.5 ± 12 mL/m(2). The mean size of the visualized septal length was 48 ± 5 mm by TEE, 51 ± 5 mm by aortic ICE, and 33 ± 6 mm by venous ICE. The Bland-Altman test indicated that the 95% limits of agreement for the measurement of septal diameter ranged from -11.0 to +5.9 mm (mean -2.5 mm) between TEE and aortic ICE, -2.8 to +33.5 mm (mean +15.3 mm) between TEE and venous ICE, and -36.6 to +0.8 mm (mean -17.9 mm) between venous and aortic ICE. Standard venous ICE generally tended to yield smaller values compared with TEE and aortic ICE for the measurement of septal length. Furthermore, the view of fossa ovalis and 'tenting effect' was optimal in 11 patients on venous ICE; however, the fossa ovalis and tip of the needle were well visualized in all patients on aortic ICE (P < 0.001). There were no major complications with the use of aortic ICE. Aortic ICE is a superior alternative to venous ICE and facilitates trans-septal puncture in patients with mitral stenosis.

  12. Arterial puncture using insulin needle is less painful than with standard needle: a randomized crossover study.

    Science.gov (United States)

    Ibrahim, Irwani; Yau, Ying Wei; Ong, Lizhen; Chan, Yiong Huak; Kuan, Win Sen

    2015-03-01

    Arterial punctures are important procedures performed by emergency physicians in the assessment of ill patients. However, arterial punctures are painful and can create anxiety and needle phobia in patients. The pain score of radial arterial punctures were compared between the insulin needle and the standard 23-gauge hypodermic needle. In a randomized controlled crossover design, healthy volunteers were recruited to undergo bilateral radial arterial punctures. They were assigned to receive either the insulin or the standard needle as the first puncture, using blocked randomization. The primary outcome was the pain score measured on a 100-mm visual analogue scale (VAS) for pain, and secondary outcomes were rate of hemolysis, mean potassium values, and procedural complications immediately and 24 hours postprocedure. Fifty healthy volunteers were included in the study. The mean (±standard deviation) VAS score in punctures with the insulin needle was lower than the standard needle (23 ± 22 mm vs. 39 ± 24 mm; mean difference = -15 mm; 95% confidence interval = -22 mm to -7 mm; p standard needle (31.3% vs. 11.6%, p = 0.035; and 4.6 ±0.7 mmol/L vs. 4.2 ±0.5 mmol/L, p = 0.002). Procedural complications were lower in punctures with the insulin needle both immediately postprocedure (0% vs. 24%; p standard needles. However, due to the higher rate of hemolysis, its use should be limited to conditions that do not require a concurrent potassium value in the same blood sample. © 2015 by the Society for Academic Emergency Medicine.

  13. Ultrasound imaging in urogynecology – state of the art 2016

    Directory of Open Access Journals (Sweden)

    Michał Bogusiewicz

    2016-11-01

    Full Text Available The role of ultrasound imaging in urogynecology is not clearly defined. Despite significant developments in visualization techniques and interpretation of images, pelvic ultrasound is still more a tool for research than for clinical practice. Structures of the lower genitourinary tract and pelvic floor can be visualized from different approaches: transperineal, introital, transvaginal, abdominal or endoanal. According to contemporary guidelines and recommendations, the role of ultrasound in urogynecology is limited to the measurement of post-void residue. However, in many instances, including planning and audit of surgical procedures, management of recurrences or complications, ultrasound may be proposed as the initial examination of choice. Ultrasound may be used for assessment of bladder neck mobility before anti-incontinence procedures. On rare occasions it is helpful in recognition of pathologies mimicking vaginal prolapse such as vaginal cyst, urethral diverticula or rectal intussusception. In patients subjected to suburethral slings, causes of surgery failure or postsurgical voiding dysfunctions can be revealed by imaging. Many reports link the location of a tape close to the bladder neck to unfavorable outcomes of sling surgery. Some postoperative complications, such as urinary retention, mesh malposition, hematoma, or urinary tract injury, can be diagnosed by ultrasound. On the other hand, the clinical value of some applications of ultrasound in urogynecology, for example measurement of the bladder wall thickness as a marker of detrusor overactivity, has not been proved.

  14. Comparison of a GPS needle-tracking system, multiplanar imaging and 2D imaging for real-time ultrasound-guided epidural anaesthesia: A randomized, comparative, observer-blinded study on phantoms.

    Science.gov (United States)

    Menacé, Cécilia; Choquet, Olivier; Abbal, Bertrand; Bringuier, Sophie; Capdevila, Xavier

    2017-04-01

    The real-time ultrasound-guided paramedian sagittal oblique approach for neuraxial blockade is technically demanding. Innovative technologies have been developed to improve nerve identification and the accuracy of needle placement. The aim of this study was to evaluate three types of ultrasound scans during ultrasound-guided epidural lumbar punctures in a spine phantom. Eleven sets of 20 ultrasound-guided epidural punctures were performed with 2D, GPS, and multiplanar ultrasound machines (660 punctures) on a spine phantom using an in-plane approach. For all punctures, execution time, number of attempts, bone contacts, and needle redirections were noted by an independent physician. Operator comfort and visibility of the needle (tip and shaft) were measured using a numerical scale. The use of GPS significantly decreased the number of punctures, needle repositionings, and bone contacts. Comfort of the physician was also significantly improved with the GPS system compared with the 2D and multiplanar systems. With the multiplanar system, the procedure was not facilitated and execution time was longer compared with 2D imaging after Bonferroni correction but interaction between the type of ultrasound system and mean execution time was not significant in a linear mixed model. There were no significant differences regarding needle tip and shaft visibility between the systems. Multiplanar and GPS needle-tracking systems do not reduce execution time compared with 2D imaging using a real-time ultrasound-guided paramedian sagittal oblique approach in spine phantoms. The GPS needle-tracking system can improve performance in terms of operator comfort, the number of attempts, needle redirections and bone contacts. Copyright © 2016 Société française d'anesthésie et de réanimation (Sfar). Published by Elsevier Masson SAS. All rights reserved.

  15. Ultrasound in Space Medicine

    Science.gov (United States)

    Dulchavsky, Scott A.; Sargsyan, A.E.

    2009-01-01

    This slide presentation reviews the use of ultrasound as a diagnostic tool in microgravity environments. The goals of research in ultrasound usage in space environments are: (1) Determine accuracy of ultrasound in novel clinical conditions. (2) Determine optimal training methodologies, (3) Determine microgravity associated changes and (4) Develop intuitive ultrasound catalog to enhance autonomous medical care. Also uses of Ultrasound technology in terrestrial applications are reviewed.

  16. Gastrointestinal ultrasound in neonates, infants and children

    International Nuclear Information System (INIS)

    Lobo, Maria Luisa; Roque, Mariana

    2014-01-01

    Today US plays an important and increasing role in the assessment of many, partially age-specific conditions in the GI tract in neonates, infants and children. Knowledge of the potential capabilities of US and its restrictions together with a skillful performance of GI US examination can provide essential anatomic and functional diagnostic information in many pediatric GI disorders. The aim of this review is to highlight the potential of ultrasound (US) in the evaluation of the gastrointestinal (GI) tract in neonates, infants and children. Basic and potential applications of modern US tools in pediatric GI tract are addressed, the GI US examination technique is discussed – including some common and/or typical clinical applications of and indications for US

  17. The feasibility of trans-abdominal biopsy by ultrasound guiding during uterine artery embolization for benign diseases of uterus

    International Nuclear Information System (INIS)

    Guo Wenbo; Yang Jianyong; Chen Wei; Zhuang Wenquan; Li Heping; Yao Shuzhong

    2006-01-01

    Objective: To investigate the feasibility of trans-abdominal biopsy by ultrasound guiding during uterine artery embolization (UAE) for uterine fibroids and adenomyosis. Methods: Trans-abdominal biopsies by ultrasound guiding were performed in 62 cases of uterine fibroids or adenomyosis diagnosed pre-UAE. Multi-points in focus were punctured in single lesion and multi-points in every focus of multiple lesions were punctured. The diagnosis before UAE was made according to clinical symptoms, pelvic ultrasound and pelvic magnetic resonance imaging (MRI). The pathological diagnosis by biopsy was comparative to its clinical diagnosis before biopsy. The complications were also observed. Results: Biopsies were performed successfully in 60 cases with pathological examination, including 52 uterine fibroids and 8 adenomyosis cases. The clinical diagnosis of uterine fibroids or adenomyosis was coincident with the pathology except 2 cases of fibroids diagnosed before biopsy were failed to puncture. Conclusion: Trans-abdominal biopsy by ultrasound guiding in uterine artery embolization for benign diseases of uterus is safe and feasible. (authors)

  18. The natural history of pedal puncture wounds in diabetics: a cross-sectional survey

    Directory of Open Access Journals (Sweden)

    East Jeffrey M

    2011-10-01

    Full Text Available Abstract Background Surgeons usually witness only the limb-threatening stages of infected, closed pedal puncture wounds in diabetics. Given that this catastrophic outcome often represents failure of conservative management of pre-infected wounds, some suggest consideration of invasive intervention (coring or laying-open for pre-infected wounds in hope of preventing contamination from evolving into infection, there being no evidence based guidelines. However, an invasive pre-emptive approach is only justifiable if the probability of progression to catastrophic infection is very high. Literature search revealed no prior studies on the natural history of closed pedal puncture wounds in diabetics. Methods A survey was conducted via an interviewer-administered questionnaire on 198 adult diabetics resident in the parish of St. James, Jamaica. The sample was selected using a purposive technique designed to mirror the social gradient and residential distribution of the target population and is twice the number needed to detect a prevalence of puncture wounds of 14% with a range of 7-21% in a random sample of the estimated adult diabetic population. Results The prevalence of a history of at least one closed pedal puncture wound since diagnosis of diabetes was 25.8% (CI; 19.6-31.9%. The only modifiable variable associated at the 5% level of significance with risk of pedal puncture wound, after adjustment by multivariable logistic regression, was site of interview/paying status, a variable substantially reflective of income more so than quality-of-care. Of 77 reported episodes of closed pedal puncture wound among 51 participants, 45.4% healed without medical intervention, 27.3% healed after non-surgical treatment by a doctor and 27.3% required surgical intervention ranging from debridement to below-knee amputation. Anesthetic foot (failure to feel the puncture and sole of the forefoot as site of puncture were the variables significantly associated with

  19. MR imaging with gadolinium in patients with and without post-lumbar puncture headache

    International Nuclear Information System (INIS)

    Hannerz, J.; Ericson, K.; Bro Skejoe, H.P.

    1999-01-01

    Purpose: To study frequency and extent of meningeal enhancement in patients with and without post-lumbar puncture headache (PLPH) with cerebral MR with Gd-DTPA. Material and methods: Ten consecutive patients with PLPH and 9 consecutive patients without PLPH were included in the study. Nine of the PLPH patients were reinvestigated when the PLPH was over and all non-PLPH patients during the week after the lumbar puncture. Results: Eight of the 9 patients with PLPH showed more enhancement of meningeal structures during PLPH than when PLPH had disappeared. The differences were slight in 5, more marked in 2, and pronounced in 1 patient. The 9th patient showed no change at all. In the 9 patients without PLPH, there was mainly slight enhancement before lumbar puncture and no change in enhancement after lumbar puncture as compared with before. Conclusion: PLPH is related to increased Gd-DTPA enhancement of the meninges, although the increase in enhancement during PLPH is minor in most cases. Pronounced enhancement of the meninges after lumbar puncture may predict long duration of the PLPH. (orig.)

  20. Design of Rate-Compatible Parallel Concatenated Punctured Polar Codes for IR-HARQ Transmission Schemes

    Directory of Open Access Journals (Sweden)

    Jian Jiao

    2017-11-01

    Full Text Available In this paper, we propose a rate-compatible (RC parallel concatenated punctured polar (PCPP codes for incremental redundancy hybrid automatic repeat request (IR-HARQ transmission schemes, which can transmit multiple data blocks over a time-varying channel. The PCPP coding scheme can provide RC polar coding blocks in order to adapt to channel variations. First, we investigate an improved random puncturing (IRP pattern for the PCPP coding scheme due to the code-rate and block length limitations of conventional polar codes. The proposed IRP algorithm only select puncturing bits from the frozen bits set and keep the information bits unchanged during puncturing, which can improve 0.2–1 dB decoding performance more than the existing random puncturing (RP algorithm. Then, we develop a RC IR-HARQ transmission scheme based on PCPP codes. By analyzing the overhead of the previous successful decoded PCPP coding block in our IR-HARQ scheme, the optimal initial code-rate can be determined for each new PCPP coding block over time-varying channels. Simulation results show that the average number of transmissions is about 1.8 times for each PCPP coding block in our RC IR-HARQ scheme with a 2-level PCPP encoding construction, which can reduce half of the average number of transmissions than the existing RC polar coding schemes.

  1. Technological advances and changing indications for lumbar puncture in neurological disorders.

    Science.gov (United States)

    Costerus, Joost M; Brouwer, Matthijs C; van de Beek, Diederik

    2018-03-01

    Technological advances have changed the indications for and the way in which lumbar puncture is done. Suspected CNS infection remains the most common indication for lumbar puncture, but new molecular techniques have broadened CSF analysis indications, such as the determination of neuronal autoantibodies in autoimmune encephalitis. New screening techniques have increased sensitvity for pathogen detection and can be used to identify pathogens that were previously unknown to cause CNS infections. Evidence suggests that potential treatments for neurodegenerative diseases, such as Alzheimer's disease, will rely on early detection of the disease with the use of CSF biomarkers. In addition to being used as a diagnostic tool, lumbar puncture can also be used to administer intrathecal treatments as shown by studies of antisense oligonucleotides in patients with spinal muscular atrophy. Lumbar puncture is generally a safe procedure but complications can occur, ranging from minor (eg, back pain) to potentially devastating (eg, cerebral herniation). Evidence that an atraumatic needle tip design reduces complications of lumbar puncture is compelling, and reinforces the need to change clinical practice. Copyright © 2018 Elsevier Ltd. All rights reserved.

  2. Simulation and training of lumbar punctures using haptic volume rendering and a 6DOF haptic device

    Science.gov (United States)

    Färber, Matthias; Heller, Julika; Handels, Heinz

    2007-03-01

    The lumbar puncture is performed by inserting a needle into the spinal chord of the patient to inject medicaments or to extract liquor. The training of this procedure is usually done on the patient guided by experienced supervisors. A virtual reality lumbar puncture simulator has been developed in order to minimize the training costs and the patient's risk. We use a haptic device with six degrees of freedom (6DOF) to feedback forces that resist needle insertion and rotation. An improved haptic volume rendering approach is used to calculate the forces. This approach makes use of label data of relevant structures like skin, bone, muscles or fat and original CT data that contributes information about image structures that can not be segmented. A real-time 3D visualization with optional stereo view shows the punctured region. 2D visualizations of orthogonal slices enable a detailed impression of the anatomical context. The input data consisting of CT and label data and surface models of relevant structures is defined in an XML file together with haptic rendering and visualization parameters. In a first evaluation the visible human male data has been used to generate a virtual training body. Several users with different medical experience tested the lumbar puncture trainer. The simulator gives a good haptic and visual impression of the needle insertion and the haptic volume rendering technique enables the feeling of unsegmented structures. Especially, the restriction of transversal needle movement together with rotation constraints enabled by the 6DOF device facilitate a realistic puncture simulation.

  3. Comparison of dural puncture epidural technique versus conventional epidural technique for labor analgesia in primigravida

    Directory of Open Access Journals (Sweden)

    Pritam Yadav

    2018-01-01

    Full Text Available >Background: Dural puncture epidural (DPE is a method in which a dural hole is created prior to epidural injection. This study was planned to evaluate whether dural puncture improves onset and duration of labor analgesia when compared to conventional epidural technique.Methods and Materials: Sixty term primigravida parturients of ASA grade I and II were randomly assigned to two groups of 30 each (Group E for conventional epidural and Group DE for dural puncture epidural. In group E, epidural space was identified and 18-gauge multi-orifice catheter was threaded 5 cm into the epidural space. In group DE, dura was punctured using the combines spinal epidural (CSE spinal needle and epidural catheter threaded as in group E followed by 10 ml of injection of Ropivacaine (0.2% with 20 mcg of Fentanyl (2 mcg/ml in fractions of 2.5 ml. Later, Ropivacaine 10 ml was given as a top-up on patient request. Onset, visual analouge scale (VAS, sensory and motor block, haemodynamic variables, duration of analgesia of initial dose were noted along with mode of delivery and the neonatal outcome.Results: Six parturients in group DE achieved adequate analgesia in 5 minutes while none of those in group E (P 0.05.Conclusions: Both techniques of labor analgesia are efficacious; dural puncture epidural has the potential to fasten onset and improve quality of labor analgesia when compared with conventional epidural technique.

  4. 40 CFR 63.6000 - How do I conduct tests and procedures for puncture sealant application affected sources?

    Science.gov (United States)

    2010-07-01

    ... Tire Manufacturing Testing and Initial Compliance Requirements for Puncture Sealant Application... balances to demonstrate compliance, if the storage of materials, exhaust, or the wastewater from more than...

  5. Fabrication of Bonding-Type Hollow Microneedle Array by Injection Molding and Evaluation of its Puncture Characteristics

    Science.gov (United States)

    Ogai, Noriyuki; Sugimura, Ryo; Tamaru, Takuya; Takiguchi, Yoshihiro

    A microneedle array which consists from small needles compared to a conventional metal injection needle is expected as a low invasive transdermal medical treatment device, and many fabrication approach have been conducted. In this study, we fabricated plastic hollow microneedle array by a fabrication method based on the combination of injection molding, bonding and assembly techniques. To evaluate puncture characteristics of the fabricated needle, we measured a puncture force to silicone rubber by experimental equipment using loadcell and automatic stage. Furthermore, we propose and demonstrate a new method to measure actual punctured depth from punctured trace on the needle surface modified by O2 plasma treatment.

  6. Granulomatous cystitis in chronic granulomatous disease: Ultrasound diagnosis

    International Nuclear Information System (INIS)

    Hassel, D.R.; Glasier, C.M.; McConnell, J.R.; Arkansas Children's Hospital, Little Rock

    1987-01-01

    Chronic granulomatous disease (CGD) is a fatal hereditary disease of childhood characterized by chronic recurrent bacterial infections. Involvement of the genitourinary tract is uncommon. We report a child with CGD with granulomatous cystitis demonstrated by both ultrasound and computed tomography. (orig.)

  7. Ultrasound guided double injection of blood into cisterna magna: a rabbit model for treatment of cerebral vasospasm.

    Science.gov (United States)

    Chen, Yongchao; Zhu, Youzhi; Zhang, Yu; Zhang, Zixuan; Lian, Juan; Luo, Fucheng; Deng, Xuefei; Wong, Kelvin K L

    2016-02-06

    Double injection of blood into cisterna magna using a rabbit model results in cerebral vasospasm. An unacceptably high mortality rate tends to limit the application of model. Ultrasound guided puncture can provide real-time imaging guidance for operation. The aim of this paper is to establish a safe and effective rabbit model of cerebral vasospasm after subarachnoid hemorrhage with the assistance of ultrasound medical imaging. A total of 160 New Zealand white rabbits were randomly divided into four groups of 40 each: (1) manual control group, (2) manual model group, (3) ultrasound guided control group, and (4) ultrasound guided model group. The subarachnoid hemorrhage was intentionally caused by double injection of blood into their cisterna magna. Then, basilar artery diameters were measured using magnetic resonance angiography before modeling and 5 days after modeling. The depth of needle entering into cisterna magna was determined during the process of ultrasound guided puncture. The mortality rates in manual control group and model group were 15 and 23 %, respectively. No rabbits were sacrificed in those two ultrasound guided groups. We found that the mortality rate in ultrasound guided groups decreased significantly compared to manual groups. Compared with diameters before modeling, the basilar artery diameters after modeling were significantly lower in manual and ultrasound guided model groups. The vasospasm aggravated and the proportion of severe vasospasms was greater in ultrasound guided model group than that of manual group. In manual model group, no vasospasm was found in 8 % of rabbits. The ultrasound guided double injection of blood into cisterna magna is a safe and effective rabbit model for treatment of cerebral vasospasm.

  8. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... urinary tract infection, or UTI, you're probably thinking about peeing quite a lot. Why? Because it ... Urinary Tract? Your urinary tract is actually a system made up of these main parts: two kidneys ...

  9. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... Infections Diseases & Conditions Pregnancy & Baby Nutrition & Fitness Emotions & Behavior School & Family Life First Aid & Safety Doctors & Hospitals ... Kids / Urinary Tract Infections (UTIs) What's in this article? What Exactly Is a Urinary Tract? Urinary Tract ...

  10. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... Health Growth & Development Infections Diseases & Conditions Pregnancy & Baby Nutrition & Fitness Emotions & Behavior School & Family Life First Aid & ... Kids / Urinary Tract Infections (UTIs) What's in this article? What Exactly Is a Urinary Tract? Urinary Tract ...

  11. Experimental analysis of Kevlar modification for TRUPACT-I puncture panels

    International Nuclear Information System (INIS)

    Longenbaugh, R.S.; Joseph, B.J.

    1987-05-01

    The Kevlar Test Services was initiated to determine the maximum failure force and the energy-absorbing capability of puncture panels consisting of 16, 20, and 24 layers of 3000-denier 4 x 4 basket weave Kevlar-29, bonded to a 3.41 mm 304 annealed stainless steel puncture plate. Results of these tests were compared to the TRUPACT-1 Unit-0 drop test results to determine if the existing puncture panel configuration of TRUPACT-1 could be reduced. The data indicate for 24 layers of Kevlar, the panels failed at loads greater than those recorded in the TRUPACT-1, Unit 0 tests. Energy absorbed by the 24-layer Kevlar panels was 53% greater than that measured in the TRUPACT-1, Unit 0 test. Thermal performance of 20-layer Kevlar panels was measured in a conservative test environment and exceeded the design specifications

  12. An evaluation of the Johnson-Cook model to simulate puncture of 7075 aluminum plates.

    Energy Technology Data Exchange (ETDEWEB)

    Corona, Edmundo; Orient, George Edgar

    2014-02-01

    The objective of this project was to evaluate the use of the Johnson-Cook strength and failure models in an adiabatic finite element model to simulate the puncture of 7075- T651 aluminum plates that were studied as part of an ASC L2 milestone by Corona et al (2012). The Johnson-Cook model parameters were determined from material test data. The results show a marked improvement, in particular in the calculated threshold velocity between no puncture and puncture, over those obtained in 2012. The threshold velocity calculated using a baseline model is just 4% higher than the mean value determined from experiment, in contrast to 60% in the 2012 predictions. Sensitivity studies showed that the threshold velocity predictions were improved by calibrating the relations between the equivalent plastic strain at failure and stress triaxiality, strain rate and temperature, as well as by the inclusion of adiabatic heating.

  13. International urinary tract imaging basic spinal cord injury data set

    DEFF Research Database (Denmark)

    Biering-Sørensen, F; Craggs, M; Kennelly, M

    2008-01-01

    OBJECTIVE: To create an International Urinary Tract Imaging Basic Spinal Cord Injury (SCI) Data Set within the framework of the International SCI Data Sets. SETTING: An international working group. METHODS: The draft of the Data Set was developed by a working group comprising members appointed...... of comparable minimal data. RESULTS: The variables included in the International Urinary Tract Imaging Basic SCI Data Set are the results obtained using the following investigations: intravenous pyelography or computer tomography urogram or ultrasound, X-ray, renography, clearance, cystogram, voiding cystogram...

  14. Testing and analysis to determine the shell thickness required to prevent puncture

    International Nuclear Information System (INIS)

    Ammerman, D.J.; Radloff, H.D.; Eifert, E.J.

    1998-05-01

    Type B radioactive material packages are required to withstand a hypothetical puncture accident of a free fall from a height of one meter onto a 15 cm diameter mild steel puncture probe. For many packages it is desirable to have this accident event not result in puncture or tearing of the outer shell of the package. The wall thickness necessary to prevent this has historically been determined by test or the use of empirical relations. This technique generally results in overly conservative designs, but the degree of conservatism is uncertain. The use of modem finite element codes to determine package response to puncture accidents can result in designs that are both safe and economical. The work reported in this paper is aimed at developing a method to analytically determine the wall thickness required to prevent puncture. For designers and regulators to have confidence in this analytical method, however, it must be benchmarked against test results. A series of tests has been conducted with differing shell thicknesses, shell materials of mild steel and stainless steel, and shell backing materials of lead, foam, and air. The results of these tests have been compared with pre-test analytical predictions of the response obtained from the nonlinear transient dynamic finite element program PRONTO-2D. From this comparison it can be seen that the finite element method can accurately predict the response of packages to puncture accidents. This implies that an analytical technique based on the finite element method can be used to design packages having known response and margin of safety against tearing of the outer shell. In addition, the analytical technique can accurately predict the deformed shape of the package following the test. This may be important for subsequent calculations, such as external dose and heat input during a thermal event

  15. Development and psychometric evaluation of the arterial puncture self-efficacy scale.

    Science.gov (United States)

    Hernández-Padilla, José Manuel; Granero-Molina, José; Márquez-Hernández, Verónica V; Suthers, Fiona; Fernández-Sola, Cayetano

    2016-05-01

    Arterial puncture for arterial blood gases (ABG) analysis can be a risky, painful, difficult-to-perform procedure that is often insufficiently practised and generates stress and discomfort amongst patients and healthcare professionals. Self-efficacy is a key component in the acquisition of procedural skills. Therefore, professionals' self-efficacy in arterial puncture should be measured before attempting the procedure on real patients. To develop and psychometrically assess a self-efficacy scale in arterial puncture. An observational cross-sectional design was used in this study. Faculty of Education Sciences, Nursing and Physiotherapy in a higher education institution in the south of Spain. A convenience sample of 342 nursing students entered and completed the study. All participants met the following inclusion criteria: (1) ≥18years old and (2) enrolled in a nursing degree programme during the 2014/2015 academic year. Participants were 74% female (n=254) and their age ranged from 18 to 50, with a mean age of 21.74years (SD=5.14). The Arterial Puncture Self-Efficacy Scale (APSES) was developed and psychometrically tested. Reliability and content validity were studied. Predictive validity and concurrent validity assessed criterion validity. In addition, principal component analysis and known-group analysis evaluated construct validity. Principal component analysis revealed the two-subscale structure of the final 22-item version of the Arterial Puncture Self-Efficacy Scale (APSES). A total Cronbach's alpha coefficient of 0.97 showed its high reliability. The APSES' content validity index was excellent (S-CVI/Ave=0.95). Predictive and concurrent validity analysis demonstrated the good criterion validity of the tool. Supporting the APSES' sensitivity and specificity, known-groups analysis evidenced significant differences (pgood psychometric properties for measuring self-efficacy in arterial puncture for ABG analysis. Copyright © 2016 Elsevier Ltd. All rights

  16. Subcutaneous Emphysema Induced by Cryotherapy: A Complication due to Previous Punctures

    Directory of Open Access Journals (Sweden)

    Jared Martínez-Coronado

    2015-01-01

    Full Text Available Cryosurgery is a common therapeutic modality used in dermatology; therefore we must be aware of its possible adverse effects. We report a case of a patient with subcutaneous emphysema which occurred following the application of cryotherapy after multiple punctures of local anesthetic and intralesional steroids in a chest keloid scar. Despite the fact that this condition was gradually resolved after expectant observation, we warn about this complication when sprayed cryotherapy is preceded by multiple punctures on cutaneous lesions above bony surfaces. In similar settings, cryotherapy must be first administered or a cotton-tip applicator should be used.

  17. Use of a Puncture Needle for Recanalization of an Occluded Right Subclavian Vein

    International Nuclear Information System (INIS)

    Gupta, Himanshu; Murphy, Timothy P.; Soares, Gregory M.

    1998-01-01

    We report a patient in whom we used a puncture needle to initiate percutaneous recanalization of a chronic occlusion of the junction between the right subclavian vein and the right brachiocephalic vein. Under fluoroscopic guidance, an 18-gauge needle was used to puncture the right subclavian vein. When contrast material injected through the needle confirmed intravascular location, the needle was advanced until it deflected and perforated an occlusion balloon target positioned within the right brachiocephalic vein. This technique may be useful in patients with central venous occlusions that are refractory to traversal using traditional catheter and guidewire techniques

  18. Development of a new bench for puncturing of irradiated fuel rods in STAR hot laboratory

    Science.gov (United States)

    Petitprez, B.; Silvestre, P.; Valenza, P.; Boulore, A.; David, T.

    2018-01-01

    A new device for puncturing of irradiated fuel rods in commercial power plants has been designed by Fuel Research Department of CEA Cadarache in order to provide experimental data of high precision on fuel pins with various designs. It will replace the current set-up that has been used since 1998 in hot cell 2 of STAR facility with more than 200 rod puncturing experiments. Based on this consistent experimental feedback, the heavy-duty technique of rod perforation by clad punching has been preserved for the new bench. The method of double expansion of rod gases is also retained since it allows upgrading the confidence interval of volumetric results obtained from rod puncturing. Furthermore, many evolutions have been introduced in the new design in order to improve its reliability, to make the maintenance easier by remote handling and to reduce experimental uncertainties. Tightness components have been studied with Sealing Laboratory Maestral at Pierrelatte so as to make them able to work under mixed pressure conditions (from vacuum at 10-5 mbar up to pressure at 50 bars) and to lengthen their lifetime under permanent gamma irradiation in hot cell. Bench ergonomics has been optimized to make its operating by remote handling easier and to secure the critical phases of a puncturing experiment. A high pressure gas line equipped with high precision pressure sensors out of cell can be connected to the bench in cell for calibration purposes. Uncertainty analyses using Monte Carlo calculations have been performed in order to optimize capacity of the different volumes of the apparatus according to volumetric characteristics of the rod to be punctured. At last this device is composed of independent modules which allow puncturing fuel pins out of different geometries (PWR, BWR, VVER). After leak tests of the device and remote handling simulation in a mock-up cell, several punctures of calibrated specimens have been performed in 2016. The bench will be implemented soon in hot

  19. Laparoscopic Removal of a Large Ovarian Mass Utilizing Planned Trocar Puncture

    Science.gov (United States)

    2012-01-01

    Background: Large cystic ovarian masses pose technical challenges to the laparoscopic surgeon. Removing large, potentially malignant specimens must be done with care to avoid the leakage of cyst fluid into the abdominal cavity. Case: We present the case of a large ovarian cystic mass treated laparoscopically with intentional trocar puncture of the mass to drain and remove the mass. Discussion: Large cystic ovarian masses can be removed laparoscopically with intentional trocar puncture of the mass to facilitate removal without leakage of cyst fluid. PMID:22906344

  20. General Ultrasound Imaging

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    Full Text Available ... size, shape and consistency (whether the object is solid or filled with fluid). In medicine, ultrasound is ... ultrasound, measures the direction and speed of blood cells as they move through vessels. The movement of ...

  1. General Ultrasound Imaging

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    Full Text Available ... procedure? Ultrasound examinations can help to diagnose a variety of conditions and to assess organ damage following ... the Ultrasound-Guided Breast Biopsy page . diagnose a variety of heart conditions, including valve problems and congestive ...

  2. General Ultrasound Imaging

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    Full Text Available ... 3-D) ultrasound that formats the sound wave data into 3-D images. A Doppler ultrasound study ... at these links. About Us | Contact Us | FAQ | Privacy | Terms of Use | Links | Site Map Copyright © 2018 ...

  3. General Ultrasound Imaging

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    Full Text Available ... 3-D) ultrasound that formats the sound wave data into 3-D images. A Doppler ultrasound study ... to do the scanning. The transducer is a small hand-held device that resembles a microphone, attached ...

  4. General Ultrasound Imaging

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    Full Text Available ... in infections With knowledge about the speed and volume of blood flow gained from a Doppler ultrasound ... the body while other areas, especially air-filled lungs, are poorly suited for ultrasound. top of page ...

  5. General Ultrasound Imaging

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    Full Text Available ... flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ... color picture. It can also convert blood flow information into a distinctive sound that can be heard ...

  6. General Ultrasound Imaging

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    Full Text Available ... flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ... care physician, or to the physician or other healthcare provider who requested the exam. Usually, the referring ...

  7. General Ultrasound Imaging

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    Full Text Available ... flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ... at these links. About Us | Contact Us | FAQ | Privacy | Terms of Use | Links | Site Map Copyright © 2018 ...

  8. General Ultrasound Imaging

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    Full Text Available ... top of page What are the benefits vs. risks? Benefits Most ultrasound scanning is noninvasive (no needles ... procedures such as needle biopsies and fluid aspiration. Risks For standard diagnostic ultrasound , there are no known ...

  9. General Ultrasound Imaging

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    Full Text Available ... ultrasound. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... move through vessels. The movement of blood cells causes a change in pitch of the reflected sound ...

  10. General Ultrasound Imaging

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    Full Text Available ... ultrasound. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... requested the exam. Usually, the referring physician or health care provider will share the results with you. ...

  11. General Ultrasound Imaging

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    Full Text Available ... flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ... possible charges you will incur. Web page review process: This Web page is reviewed regularly by a ...

  12. General Ultrasound Imaging

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    Full Text Available ... need to be returned to the transducer for analysis. Ultrasound has difficulty penetrating bone and, therefore, can ... ultrasound procedure View full size with caption Pediatric Content Some imaging tests and treatments have special pediatric ...

  13. General Ultrasound Imaging

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    Full Text Available ... flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ... legs, neck and/or brain (in infants and children) or within various body organs such as the ...

  14. General Ultrasound Imaging

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    Full Text Available ... flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ... sonography is performed using the same transducer. Rarely, young children may need to be sedated in order ...

  15. General Ultrasound Imaging

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    Full Text Available ... image. Ultrasound examinations do not use ionizing radiation (as used in x-rays ), thus there is no ... structure and movement of the body's internal organs, as well as blood flowing through blood vessels. Ultrasound ...

  16. General Ultrasound Imaging

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    Full Text Available ... testing. image the breasts and guide biopsy of breast cancer ( see the Ultrasound-Guided Breast Biopsy page . diagnose ... Ultrasound is the preferred imaging modality for the diagnosis and monitoring of pregnant women and their unborn ...

  17. General Ultrasound Imaging

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    Full Text Available ... Ultrasound is the preferred imaging modality for the diagnosis and monitoring of pregnant women and their unborn ... needle biopsies and fluid aspiration. Risks For standard diagnostic ultrasound , there are no known harmful effects on ...

  18. General Ultrasound Imaging

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    Full Text Available ... More Info Images/Videos About Us News Physician Resources Professions Site Index A-Z General Ultrasound Ultrasound ... computer or television monitor. The image is created based on the amplitude (loudness), frequency (pitch) and time ...

  19. General Ultrasound Imaging

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    Full Text Available ... ultrasound. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... more extensive exams may take up to an hour. When the examination is complete, you may be ...

  20. General Ultrasound Imaging

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    Full Text Available ... Imaging? Ultrasound waves are disrupted by air or gas; therefore ultrasound is not an ideal imaging technique ... with caption Pediatric Content Some imaging tests and treatments have special pediatric considerations. The teddy bear denotes ...

  1. General Ultrasound Imaging

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    Full Text Available ... may produce minimal discomfort. If a Doppler ultrasound study is performed, you may actually hear pulse-like sounds that change in pitch as the blood flow is monitored and measured. Most ultrasound examinations ...

  2. General Ultrasound Imaging

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    Full Text Available ... ultrasound. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... have special pediatric considerations. The teddy bear denotes child-specific content. Related Articles and Media Angioplasty and ...

  3. General Ultrasound Imaging

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    Full Text Available ... ultrasound. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... about this beforehand and be made aware of food and drink restrictions that may be needed prior ...

  4. General Ultrasound Imaging

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    Full Text Available ... Ultrasound is safe, noninvasive, and does not use ionizing radiation. This procedure requires little to no special preparation. ... create an image. Ultrasound examinations do not use ionizing radiation (as used in x-rays ), thus there is ...

  5. General Ultrasound Imaging

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    Full Text Available ... flat sections of the body. Advancements in ultrasound technology include three-dimensional (3-D) ultrasound that formats ... American College of Radiology (ACR) and the Radiological Society of North America (RSNA), comprising physicians with expertise ...

  6. Medical Ultrasound Imaging.

    Science.gov (United States)

    Hughes, Stephen

    2001-01-01

    Explains the basic principles of ultrasound using everyday physics. Topics include the generation of ultrasound, basic interactions with material, and the measurement of blood flow using the Doppler effect. (Author/MM)

  7. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... ultrasound. top of page How does the procedure work? Ultrasound imaging is based on the same principles ... the transducer is pressed against the skin, it directs small pulses of inaudible, high-frequency sound waves ...

  8. Imaging after urinary tract infection in older children and adolescents.

    Science.gov (United States)

    Kurtz, Michael P; Chow, Jeanne S; Johnson, Emilie K; Rosoklija, Ilina; Logvinenko, Tanya; Nelson, Caleb P

    2015-05-01

    There are few guidelines and little data on imaging after urinary tract infections in older children. We determined the clinical yield of renal and bladder ultrasound, and voiding cystourethrogram in older children and adolescents after urinary tract infection. We analyzed findings on voiding cystourethrogram, and renal and bladder ultrasound as well as the clinical history of patients who underwent the 2 studies on the same day between January 2006 and December 2010. We selected for study patients 5 to 18 years old who underwent imaging for urinary tract infection. Those with prior postnatal genitourinary imaging or prenatal hydronephrosis were excluded from analysis. We identified a cohort of 153 patients, of whom 74% were 5 to 8 years old, 21% were 8 to 12 years old and 5% were 12 to 18 years old. Of the patients 77% were female, 78% had a febrile urinary tract infection history and 55% had a history of recurrent urinary tract infections. Renal and bladder ultrasound findings revealed hydronephrosis in 7.8% of patients, ureteral dilatation in 3.9%, renal parenchymal findings in 20% and bladder findings in 12%. No patient had moderate or greater hydronephrosis. Voiding cystourethrogram showed vesicoureteral reflux in 34% of cases and bladder or urethral anomalies in 12%. Reflux was grade I, II-III and greater than III in 5.9%, 26% and 2% of patients, respectively. For any voiding cystourethrogram abnormality the sensitivity and specificity of any renal and bladder ultrasound abnormality were 0.49 (95% CI 0.37-0.62) and 0.76 (95% CI 0.66-0.84), respectively. Positive and negative predictive values were 0.58 (95% CI 0.44-0.71) and 0.69 (0.59-0.77), respectively. In older children with a history of urinary tract infection the imaging yield is significant. However, imaging revealed high grade hydronephrosis or high grade vesicoureteral reflux in few patients. Renal ultrasound is not reliable for predicting voiding cystourethrogram findings such as vesicoureteral

  9. Ultrasound Imaging of Cystic Nephroma

    Directory of Open Access Journals (Sweden)

    Federico Greco

    2017-07-01

    Full Text Available Cystic nephroma is a rare, benign multicystic lesion of the kidney. This tumor occurs both in children and in adults. In children, it is highly prevalent in males; in adults, it is more frequent in women. The term “cystic nephroma” represents two apparently different entities: pediatric cystic nephroma, a benign form thought to originate from metanephric tissue, and adult cystic nephroma, considered as a lesion of mixed epithelial stromal tumor. The clinical presentation may be a palpable mass or nonspecific symptoms such as abdominal pain, hematuria, and urinary tract infections. In this review, we summarize the ultrasound imaging features of cystic nephroma and describe the characteristics of the most common renal cystic lesions and the differential diagnosis of cystic nephroma with other renal cystic lesions.

  10. Oviposition punctures in cucurbit fruits and their economic damage caused by the sterile female melon fly, Bactrocera cucurbitae Coquillett

    International Nuclear Information System (INIS)

    Miyatake, T.; Irabu, T.; Higa, R.

    1993-01-01

    Oviposition punctures caused by sterile females of the tephritid Bactrocera cucurbitae in cucurbit fruits were examined and economic damage was evaluated in Okinawa, Ryukyu Archipelago, Japan. Cage experiments in the field confirmed that sterile females make punctures (sterile stings) on fruits. The features of sterile stings differed depending on fruit species and were classified into 5 types

  11. Direct right ventricular puncture for hemodynamic evaluation of a mechanical tricuspid valve prosthesis: a new indication for an old procedure.

    Science.gov (United States)

    Gibson, M A; Carell, E S

    1997-11-01

    The advent of transvenous right heart catheterization has relegated direct transthoracic right ventricular puncture largely to the role of "interesting historical footnote." However, in the case of a right ventricle that is "protected" by a mechanical tricuspid valve prosthesis, direct right ventricular puncture represents a reasonable alternative for obtaining accurate hemodynamic information.

  12. Technical Note: Thoracic duct embolization for treatment of chylothorax: A novel guidance technique for puncture using combined MRI and fluoroscopy

    International Nuclear Information System (INIS)

    Praveen, Alampath; Sreekumar, Karumathil Pullara; Nazar, Puthukudiyil Kader; Moorthy, Srikanth

    2012-01-01

    Thoracic duct embolization (TDE) is an established radiological interventional procedure for thoracic duct injuries. Traditionally, it is done under fluoroscopic guidance after opacifying the thoracic duct with bipedal lymphangiography. We describe our experience in usinga heavily T2W sequence for guiding thoracic duct puncture and direct injection of glue through the puncture needle without cannulating the duct

  13. Technical Note: Thoracic duct embolization for treatment of chylothorax: A novel guidance technique for puncture using combined MRI and fluoroscopy.

    Science.gov (United States)

    Praveen, Alampath; Sreekumar, Karumathil Pullara; Nazar, Puthukudiyil Kader; Moorthy, Srikanth

    2012-04-01

    Thoracic duct embolization (TDE) is an established radiological interventional procedure for thoracic duct injuries. Traditionally, it is done under fluoroscopic guidance after opacifying the thoracic duct with bipedal lymphangiography. We describe our experience in usinga heavily T2W sequence for guiding thoracic duct puncture and direct injection of glue through the puncture needle without cannulating the duct.

  14. Influence of repetitive finger puncturing on skin perfusion and capillary blood analysis in patients with diabetes mellitus

    NARCIS (Netherlands)

    de Graaff, J. C.; Hemmes, G. J.; Bruin, T.; Ubbink, D. T.; Michels, R. P.; Jacobs, M. J.; Sanders, G. T.

    1999-01-01

    Frequent puncturing of fingers to check blood glucose in patients with type 1 diabetes might alter skin perfusion and, hence, influence the representativeness of the blood sample. We investigated the influence of repetitive puncturing on skin microcirculatory perfusion using laser Doppler fluxmetry

  15. Pediatric Urinary Tract Infection

    Science.gov (United States)

    SBA National Resource Center: 800-621-3141 Pediatric Urinary Tract Infections and Catheterization in Children with Neurogenic Bladder and Bowel Why is it important to begin urologic care in infancy and ...

  16. Urinary tract infection - children

    Science.gov (United States)

    UTI - children; Cystitis - children; Bladder infection - children; Kidney infection - children; Pyelonephritis - children ... Craig JC. Long-term antibiotics for preventing recurrent urinary tract infection in children. Cochrane Database Syst Rev . 2011;(3):CD001534. PMID: ...

  17. Upper respiratory tract (image)

    Science.gov (United States)

    The major passages and structures of the upper respiratory tract include the nose or nostrils, nasal cavity, mouth, throat (pharynx), and voice box (larynx). The respiratory system is lined with a mucous membrane that ...

  18. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... transducer sends out high-frequency sound waves (that the human ear cannot hear) into the body and then ... ultrasound , there are no known harmful effects on humans. top of page What are the limitations of General Ultrasound Imaging? Ultrasound waves are ...

  19. Clinical diagnostic ultrasound

    International Nuclear Information System (INIS)

    Barnett, E.; Morley, P.

    1986-01-01

    This textbook on diagnostic ultrasound covers the main systems, with emphasis being placed on the clinical application of diagnostic ultrasound in everyday practice. It provides not only a textbook for postgraduates (particularly FRCR candidates), but also a reference work for practitioners of clinical ultrasound and clinicians generally

  20. Assessment of infective urinary tract disorders

    International Nuclear Information System (INIS)

    Sixt, R.; Stokland, E.

    1998-01-01

    Urinary tracts infection (UTI) is common in children, particularly in the youngest age groups. There is a risk for progressive deterioration of renal function in these children if aggravating factors such as gross reflux and/or outflow obstruction of the urinary tract are present. In this review the pros and cons of available scintigrafic and radiological imaging techniques for the work-up of these children are presented. Ultrasound can be used in the acute phase to exclude obstruction but can not reliably show transient or permanent parenchymal lesions. The presence of reflux can be established with X-ray or direct nuclide cystography. The X-ray technique gives good morphological information and has a grading system with prognostic relevance. Both techniques are invasive and great care must be taken to keep the radiation burden down with the X-ray technique. Indirect nuclide cystography following a renographic study is non-invasive but has a lower sensitivity than direct techniques. More experience is needed with the indirect technique to evaluate the consequences of its apparently low sensitivity. Urography has a limited place in the acute work-up of urinary tract infection but can be used to look for renal scarring 1-2 years after an acute pyelonephritis. The 99m Tc dimercaptosuccinic acid (DMSA) scan can be used during the acute UTI to show pyelonephritic lesions with good accuracy and/or during the follow-up after six months to show permanent lesions. The acute DMSA scan can be omitted

  1. Eggshell strength of an obligate brood parasite: a test of the puncture resistance hypothesis

    Czech Academy of Sciences Publication Activity Database

    Antonov, A.; Stokke, B. G.; Moksnes, A.; Kleven, O.; Honza, Marcel; Roskaft, E.

    2006-01-01

    Roč. 60, č. 1 (2006), s. 11-18 ISSN 0340-5443 Grant - others:Research Council of Norway(NO) 151641/432 Institutional research plan: CEZ:AV0Z60930519 Keywords : brood parasitism * eggshell thickness * puncture resistance * Acrocephalus * cuckoo Subject RIV: EG - Zoology Impact factor: 2.316, year: 2006

  2. Gadolinium enhancement of spinal subdural collection on magnetic resonance imaging after lumbar puncture

    International Nuclear Information System (INIS)

    Teksam, Mehmet; Casey, Sean O.; McKinney, Alexander; Michel, Eduard; Truwit, Charles L.

    2003-01-01

    We report a 35-year-old male with an unusual contrast-enhancing sterile spinal subdural collection on magnetic resonance imaging (MRI), apparently occurring as a complication of lumbar puncture. Follow-up MRI after 4 weeks demonstrated spontaneous resolution of the collection without intervening treatment. (orig.)

  3. Quasiequilibrium states of black hole-neutron star binaries in the moving-puncture framework

    International Nuclear Information System (INIS)

    Kyutoku, Koutarou; Shibata, Masaru; Taniguchi, Keisuke

    2009-01-01

    General relativistic quasiequilibrium states of black hole-neutron star binaries are computed in the moving-puncture framework. We propose three conditions for determining the quasiequilibrium states and compare the numerical results with those obtained in the excision framework. We find that the results obtained in the moving-puncture framework agree with those in the excision framework and with those in the third post-Newtonian approximation for the cases that (i) the mass ratio of the binary is close to unity irrespective of the orbital separation, and (ii) the orbital separation is large enough (m 0 Ω 0 and Ω are the total mass and the orbital angular velocity, respectively) irrespective of the mass ratio. For m 0 Ω > or approx. 0.03, both of the results in the moving-puncture and excision frameworks deviate, more or less, from those in the third post-Newtonian approximation. Thus the numerical results do not provide a quasicircular state, rather they seem to have a non-negligible eccentricity of order 0.01-0.1. We show by numerical simulation that a method in the moving-puncture framework can provide approximately quasicircular states in which the eccentricity is by a factor of ∼2 smaller than those in quasiequilibrium given by other approaches.

  4. Haemostasis and Safety Measures before Lumbar Puncture in the Haematology Ward

    DEFF Research Database (Denmark)

    Møller, Anders; Bjerrum, Ole Weis; Afshari, Arash

    2015-01-01

    BACKGROUND/AIMS: Thrombocytopenia and the increasing use and variety of antithrombotic drugs is a challenge prior to lumbar puncture. This study examined the Danish haematology practice regarding drug pausation, assessment of haemostasis and whether fundoscopy is a routine safety measure. METHODS...

  5. Utility of the puncture of the radial artery in interventionist radiology

    International Nuclear Information System (INIS)

    Triana Rodriguez, Carlos Eduardo; Montes S, Mauricio; Barragan F, Jaime; Ucros Diaz Pablo; Ucros Diaz, Ignacio; Castillo, Luis Fernando

    1998-01-01

    We present the radial artery access, previous evaluation of collateral circulation with Allen's Test, as an alternative vascular access in patients with contraindications for femoral or axillary approaches. The radial artery puncture offers advantages, such as diminished bleeding and hematoma formation

  6. Classical and quantum Liouville theory on the Riemann sphere with n>3 punctures (III)

    International Nuclear Information System (INIS)

    Shen Jianmin; Sheng Zhengmao; Wang Zhonghua

    1992-02-01

    We study the Classical and Quantum Liouville theory on the Riemann sphere with n>3 punctures. We get the quantum exchange algebra relations between the chiral components in the Liouville theory from our assumption on the principle of quantization. (author). 5 refs

  7. Urinary Tract Infections (For Teens)

    Science.gov (United States)

    ... Staying Safe Videos for Educators Search English Español Urinary Tract Infections KidsHealth / For Teens / Urinary Tract Infections What's ... especially girls — visit a doctor. What Is a Urinary Tract Infection? A bacterial urinary tract infection (UTI) is ...

  8. Urinary Tract Infections (For Kids)

    Science.gov (United States)

    ... Staying Safe Videos for Educators Search English Español Urinary Tract Infections (UTIs) KidsHealth / For Kids / Urinary Tract Infections ( ... Let's find out more. What Exactly Is a Urinary Tract? Your urinary tract is actually a system made ...

  9. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... Staying Safe Videos for Educators Search English Español Urinary Tract Infections (UTIs) KidsHealth / For Kids / Urinary Tract Infections ( ... Let's find out more. What Exactly Is a Urinary Tract? Your urinary tract is actually a system made ...

  10. How to achieve ultrasound-guided femoral venous access: the new standard of care in the electrophysiology laboratory.

    Science.gov (United States)

    Wiles, Benedict M; Child, Nicholas; Roberts, Paul R

    2017-06-01

    Bedside vascular ultrasound machines are increasingly available. They are used to facilitate safer vascular access across a number of different specialties. In the electrophysiology laboratory however, where patients are frequently anticoagulated and require the insertion of multiple venous sheaths, anatomical landmark techniques predominate. Despite the high number of vascular complications associated with electrophysiological procedures and the increasing evidence to support its use in electrophysiology, ultrasound remains underutilised. A new standard of care is required. A comprehensive technical report, providing a detailed explanation of this important technique, will provide other electrophysiology centres with the knowledge and justification for adopting ultrasound guidance as their standard practice. We review the increasing body of evidence which demonstrates that routine ultrasound usage can substantially improve the safety of femoral venous access in the electrophysiology laboratory. We offer a comprehensive technical report to guide operators through the process of ultrasound-guided venous access, with a specific focus on the electrophysiology laboratory. Additionally, we detail a novel technique which utilises real-time colour Doppler ultrasound to accurately identify needle tip location during venous puncture. The use of vascular ultrasound to guide femoral venous cannulation is rapid, inexpensive and easily learnt. Ultrasound is readily available and offers the potential to significantly reduce vascular complications in the unique setting of the electrophysiology laboratory. Ultrasound guidance to achieve femoral venous access should be the new standard of care in electrophysiology.

  11. Electromagnetic-Tracked Biopsy under Ultrasound Guidance: Preliminary Results

    International Nuclear Information System (INIS)

    Hakime, Antoine; Deschamps, Frederic; Marques De Carvalho, Enio Garcia; Barah, Ali; Auperin, Anne; Baere, Thierry De

    2012-01-01

    Purpose: This study was designed to evaluate the accuracy and safety of electromagnetic needle tracking for sonographically guided percutaneous liver biopsies. Methods: We performed 23 consecutive ultrasound-guided liver biopsies for liver nodules with an electromagnetic tracking of the needle. A sensor placed at the tip of a sterile stylet (18G) inserted in a coaxial guiding trocar (16G) used for biopsy was localized in real time relative to the ultrasound imaging plane, thanks to an electromagnetic transmitter and two sensors on the ultrasound probe. This allows for electronic display of the needle tip location and the future needle path overlaid on the real-time ultrasound image. Distance between needle tip position and its electronic display, number of needle punctures, number of needle pull backs for redirection, technical success (needle positioned in the target), diagnostic success (correct histopathology result), procedure time, and complication were evaluated according to lesion sizes, depth and location, operator experience, and “in-plane” or “out-of-plane” needle approach. Results: Electronic display was always within 2 mm from the real position of the needle tip. The technical success rate was 100%. A single needle puncture without repuncture was used in all patients. Pull backs were necessary in six patients (26%) to obtain correct needle placement. The overall diagnostic success rate was 91%. The overall true-positive, true-negative, false-negative, and failure rates of the biopsy were 100% (19/19) 100% (2/2), 0% (0/23), and 9% (2/23). The median total procedure time from the skin puncture to the needle in the target was 30 sec (from 5–60 s). Lesion depth and localizations, operator experience, in-plane or out-of-plane approach did not affect significantly the technical, diagnostic success, or procedure time. Even when the tumor size decreased, the procedure time did not increase. Conclusions: Electromagnetic-tracked biopsy is accurate to

  12. Interobserver agreement in ultrasound examination of the biliary tract

    DEFF Research Database (Denmark)

    Grantcharov, Teodor P; Rasti, Z; Rossen, B

    2002-01-01

    bile duct (CBD), and presence of CBD stones. RESULTS: None of the radiologists observed CBD stones or fluid around the gallbladder. The CBD was clearly distinguished by both observers in all patients. There was good agreement in the conclusions of the two radiologists regarding the presence...... of gallbladder stones and substantial agreement regarding the filling of the gallbladder and splitting of the gallbladder wall. Significant difference existed in the measurements by the two radiologists regarding the thickness of the gallbladder wall and the diameter of the CBD. CONCLUSION: The novice...... radiologist's expertise in the primary diagnosis of uncomplicated gallstone disease was as good as the one provided by the experienced colleague. The significant interobserver difference in the measurements of the thickness of the gallbladder wall and the CBD diameter might indicate that assessment...

  13. Incidence of abnormal imaging and recurrent pyelonephritis after first febrile urinary tract infection in children 2 to 24 months old.

    Science.gov (United States)

    Juliano, Trisha M; Stephany, Heidi A; Clayton, Douglass B; Thomas, John C; Pope, John C; Adams, Mark C; Brock, John W; Tanaka, Stacy T

    2013-10-01

    The AAP (American Academy of Pediatrics) no longer recommends voiding cystourethrogram in children 2 to 24 months old who present with a first urinary tract infection if renal-bladder ultrasound is normal. We identified factors associated with abnormal imaging and recurrent pyelonephritis in this population. We retrospectively evaluated children diagnosed with a first episode of pyelonephritis at age 2 to 24 months using de-identified electronic medical record data from an institutional database. Data included age at first urinary tract infection, gender, race/ethnicity, need for hospitalization, intravenous antibiotic use, history of abnormal prenatal ultrasound, renal-bladder ultrasound and voiding cystourethrogram results, urinary tract infection recurrence and surgical intervention. Risk factors for abnormal imaging and urinary tract infection recurrence were analyzed by univariate logistic regression, the chi-square test and survival analysis. We identified 174 patients. Of the 154 renal-bladder ultrasounds performed 59 (38%) were abnormal. Abnormal prenatal ultrasound (p = 0.01) and the need for hospitalization (p = 0.02) predicted abnormal renal-bladder ultrasound. Of the 95 patients with normal renal-bladder ultrasound 84 underwent voiding cystourethrogram. Vesicoureteral reflux was more likely in patients who were white (p = 0.003), female (p = 0.02) and older (p = 0.04). Despite normal renal-bladder ultrasound, 23 of 84 patients (24%) had dilating vesicoureteral reflux. Of the 95 patients with normal renal-bladder ultrasound 14 (15%) had recurrent pyelonephritis and 7 (7%) went on to surgical intervention. Despite normal renal-bladder ultrasound after a first pyelonephritis episode, a child may still have vesicoureteral reflux, recurrent pyelonephritis and the need for surgical intervention. If voiding cystourethrogram is deferred, parents should be counseled on these risks. Copyright © 2013 American Urological Association Education and Research, Inc

  14. A trucut biopsy needle for bipolar radiofrequency ablation of needle tract: a proof-of-concept experiment.

    Science.gov (United States)

    Bruners, Philipp; Penzkofer, Tobias; Isfort, Peter; Pfeffer, Jochen; Schmitz-Rode, Thomas; Günther, Rolf W; Mahnken, Andreas H

    2010-08-01

    To develop a trucut biopsy needle featuring two electrodes that allow for bipolar radiofrequency (RF) coagulation of the puncture tract. We modified a 14-G trucut biopsy needle to contain two insulated electrodes and connected the device to an RF generator. Biopsies in ex vivo porcine liver and kidney were performed. The puncture tract was coagulated by using different RF energy settings (5 W, 10 W, 20 W). Tissue specimens were dissected along the puncture tract and the coagulation area was macroscopically evaluated. CT-guided in vivo liver and kidney biopsies were performed in two domestic pigs. Lengths of specimens were measured. Post-biopsy contrast-enhanced CT examinations were performed to rule out biopsy-related bleeding. Animals were euthanised and coagulation areas macroscopically explored. The mean diameters of the coagulated area around the ex vivo biopsy tract were 4.2 +/- 1.1 mm (5 W), 6.0 +/- 2.0 mm (10 W) and 5.2 +/- 0.51 mm (20 W) in liver and 5.0 +/- 0.7 mm (5 W), 6.6 +/- 0.9 (10 W) and 6.0 +/- 2.0 mm (20 W) in kidney. After biopsies CT revealed no bleeding. Mean maximum coagulation diameters were 10.1 +/- 4.6 mm (10 W) in liver and 6.0 +/- 2.5 mm (10 W) in kidney. Mean length of the specimens was 12.2 +/- 4.4 mm in kidney and 11.1 +/- 3.6 mm in liver tissue. Bipolar RF biopsy is a promising tool for tract coagulation after percutaneous biopsy.

  15. A trucut biopsy needle for bipolar radiofrequency ablation of needle tract: a proof-of-concept experiment

    International Nuclear Information System (INIS)

    Bruners, Philipp; Penzkofer, Tobias; Isfort, Peter; Pfeffer, Jochen; Schmitz-Rode, Thomas; Guenther, Rolf W.; Mahnken, Andreas H.

    2010-01-01

    To develop a trucut biopsy needle featuring two electrodes that allow for bipolar radiofrequency (RF) coagulation of the puncture tract. We modified a 14-G trucut biopsy needle to contain two insulated electrodes and connected the device to an RF generator. Biopsies in ex vivo porcine liver and kidney were performed. The puncture tract was coagulated by using different RF energy settings (5 W, 10 W, 20 W). Tissue specimens were dissected along the puncture tract and the coagulation area was macroscopically evaluated. CT-guided in vivo liver and kidney biopsies were performed in two domestic pigs. Lengths of specimens were measured. Post-biopsy contrast-enhanced CT examinations were performed to rule out biopsy-related bleeding. Animals were euthanised and coagulation areas macroscopically explored. The mean diameters of the coagulated area around the ex vivo biopsy tract were 4.2 ± 1.1 mm (5 W), 6.0 ± 2.0 mm (10 W) and 5.2 ± 0.51 mm (20 W) in liver and 5.0 ± 0.7 mm (5 W), 6.6 ± 0.9 (10 W) and 6.0 ± 2.0 mm (20 W) in kidney. After biopsies CT revealed no bleeding. Mean maximum coagulation diameters were 10.1 ± 4.6 mm (10 W) in liver and 6.0 ± 2.5 mm (10 W) in kidney. Mean length of the specimens was 12.2 ± 4.4 mm in kidney and 11.1 ± 3.6 mm in liver tissue. Bipolar RF biopsy is a promising tool for tract coagulation after percutaneous biopsy. (orig.)

  16. Design and application of model for training ultrasound-guided vascular cannulation in pediatric patients.

    Science.gov (United States)

    Pérez-Quevedo, O; López-Álvarez, J M; Limiñana-Cañal, J M; Loro-Ferrer, J F

    2016-01-01

    Central vascular cannulation is not a risk-free procedure, especially in pediatric patients. Newborn and infants are small and low-weighted, their vascular structures have high mobility because of tissue laxity and their vessels are superficial and with small diameter. These characteristics, together with the natural anatomical variability and poor collaboration of small children, make this technique more difficult to apply. Therefore, ultrasound imaging is increasingly being used to locate vessels and guide vascular access in this population. (a) To present a model that simulates the vascular system for training ultrasound-guided vascular access in pediatrics patients; (b) to ultrasound-guided vascular cannulation in the model. The model consisted of two components: (a) muscular component: avian muscle, (b) vascular component: elastic tube-like structure filled with fluid. 864 ecoguided punctures was realized in the model at different vessel depth and gauge measures were simulated, for two medical operators with different degree of experience. The average depth and diameter of vessel cannulated were 1.16 (0.42)cm and 0.43 (0.1)cm, respectively. The average number of attempts was of 1.22 (0.62). The percentage of visualization of the needle was 74%. The most frequent maneuver used for the correct location, was the modification of the angle of the needle and the relocation of the guidewire in 24% of the cases. The average time for the correct cannulations was 41 (35.8)s. The more frequent complications were the vascular perforation (11.9%) and the correct vascular puncture without possibility of introducing the guidewire (1.2%). The rate of success was 96%. The model simulates the anatomy (vascular and muscular structures) of a pediatric patient. It is cheap models, easily reproducible and a useful tool for training in ultrasound-guided puncture and cannulation. Copyright © 2015 Elsevier España, S.L.U. y SEMICYUC. All rights reserved.

  17. Percutaneous subclavian artery stent-graft placement following failed ultrasound guided subclavian venous access

    Directory of Open Access Journals (Sweden)

    Szkup Peter

    2006-05-01

    Full Text Available Abstract Background Ultrasound guidance for central and peripheral venous access has been proven to improve success rates and reduce complications of venous cannulation. Appropriately trained and experienced operators add significantly to diminished patient morbidity related to venous access procedures. We discuss a patient who required an arterial stent-graft to prevent arterial hemorrhage following inadvertent cannulation of the proximal, ventral, right subclavian artery related to unsuccessful ultrasound guided access of the subclavian vein. Case presentation During pre-operative preparation for aortic valve replacement and aorto-coronary bypass surgery an anesthetist attempted ultrasound guided venous access. The ultrasound guided attempt to access the right jugular vein failed and the ultrasound guided attempt at accessing the subclavian vein resulted in inappropriate placement of an 8.5 F sheath in the arterial system. Following angiographic imaging and specialist consultations, an arterial stent-graft was deployed in the right subclavian artery rather than perform an extensive anterior chest wall resection and dissection to extract the arterial sheath. The patient tolerated the procedure, without complication, despite occlusion of the right internal mammary artery and the right vertebral artery. There were no neurologic sequelae. There was no evidence of hemorrhage after subclavian artery sheath extraction and stent-graft implantation. Conclusion The attempted ultrasound guided puncture of the subclavian vein resulted in placement of an 8.5 F subclavian artery catheter. Entry of the catheter into the proximal subclavian artery beneath the medial clavicle, the medial first rib and the manubrium suggests that the operator, most likely, did not directly visualize the puncture needle enter the vessel with the ultrasound. The bones of the anterior chest impede the ultrasound beam and the vessels in this area would not be visible to ultrasound

  18. Diagnostic value of 64-slice spiral computed tomography imaging of the urinary tract during the excretory phase for urinary tract obstruction.

    Science.gov (United States)

    Zhao, De-Li; Jia, Guang-Sheng; Chen, Peng; Liu, Xin-Ding; Shu, Sheng-Jie; Ling, Zai-Sheng; Fan, Ting-Ting; Shen, Xiu-Fen; Zhang, Jin-Ling

    2017-11-01

    The present study aimed to assess the diagnostic value of 64-slice spiral computed tomography (CT) imaging of the urinary tract during the excretory phase for urinary tract obstruction. CT imaging of the urinary tract during the excretory phase was performed in 46 patients that had been diagnosed with urinary tract obstruction by B-mode ultrasound imaging or clinical manifestations. It was demonstrated that out of the 46 patients, 18 had pelvic and ureteral calculi, 12 cases had congenital malformations, 3 had ureteral stricture caused by urinary tract infection and 13 cases had malignant tumors of the urinary tract. The average X-ray dose planned for the standard CT scan of the urinary tract group 1 was 14.11±5.45 mSv, while the actual X-ray dose administered for the CT scan during the excretory phase group 2 was 9.01±4.56 mSv. The difference between the two groups was statistically significant (t=15.36; Purinary tract during the excretory phase has a high diagnostic value for urinary tract obstruction.

  19. Pediatric urinary tract infection

    Energy Technology Data Exchange (ETDEWEB)

    Blickman, J.G.

    1991-02-06

    Acute urinary tract infection (UTI) is an important cause of morbidity in children and may be complicated by congenital urinary tract abnormalities of a functional or anatomic nature which, predispose to recurrent UTI's that in turn may lead to renal failure and hypertension. Early radiologic and ultrasonographic investigations may reveal these anatomic anomalies in particular because the urinary tract, specifically in children, is not readily accessible to adequate clinical examinations Excretory urography (EU) has been considered as the 'gold standard' of upper urinary tract visualization, while the voiding cystourethrogram (VCUG) was thought to be the preferential method of imaging of the lower urinary tract. Recently, major technical advances have altered this commonly accepted diagnostic workup. Although ultrasonography, radio-nuclide scanning and urodynamics have become important contributors to the understanding of pathophysiology of UTI's their value and place in assessment of the sequence of imaging has not been comprehensively studied. This thesis deals about the optimization of the choice and the order of the different imaging techniques used in the evaluation of children, younger than six year with UTI. (author). 243 refs.; 23 figs.; 8 tabs.

  20. Pediatric urinary tract infection

    International Nuclear Information System (INIS)

    Blickman, J.G.

    1991-01-01

    Acute urinary tract infection (UTI) is an important cause of morbidity in children and may be complicated by congenital urinary tract abnormalities of a functional or anatomic nature which, predispose to recurrent UTI's that in turn may lead to renal failure and hypertension. Early radiologic and ultrasonographic investigations may reveal these anatomic anomalies in particular because the urinary tract, specifically in children, is not readily accessible to adequate clinical examinations Excretory urography (EU) has been considered as the 'gold standard' of upper urinary tract visualization, while the voiding cystourethrogram (VCUG) was thought to be the preferential method of imaging of the lower urinary tract. Recently, major technical advances have altered this commonly accepted diagnostic workup. Although ultrasonography, radio-nuclide scanning and urodynamics have become important contributors to the understanding of pathophysiology of UTI's their value and place in assessment of the sequence of imaging has not been comprehensively studied. This thesis deals about the optimization of the choice and the order of the different imaging techniques used in the evaluation of children, younger than six year with UTI. (author). 243 refs.; 23 figs.; 8 tabs

  1. Upper urinary tract tumors

    DEFF Research Database (Denmark)

    Gandrup, Karen L; Nordling, Jørgen; Balslev, Ingegerd

    2014-01-01

    BACKGROUND: Computed tomography urography (CTU) is used widely in the work-up of patients with symptoms of urinary tract lesions. Preoperative knowledge of whether a tumor is invasive or non-invasive is important for the choice of surgery. So far there are no studies about the distinction...... of invasive and non-invasive tumors in ureter and renal pelvis based on the enhancement measured with Hounsfield Units. PURPOSE: To examine the value of CTU using split-bolus technique to distinguish non-invasive from invasive urothelial carcinomas in the upper urinary tract. MATERIAL AND METHODS: Patients...... obtained at CTU could distinguish between invasive and non-invasive lesions. No patients had a CTU within the last year before the examination that resulted in surgery. CONCLUSION: A split-bolus CTU cannot distinguish between invasive and non-invasive urothelial tumors in the upper urinary tract...

  2. Hybrid Approach for Biliary Interventions Employing MRI-Guided Bile Duct Puncture with Near-Real-Time Imaging

    Energy Technology Data Exchange (ETDEWEB)

    Wybranski, Christian, E-mail: Christian.Wybranski@uk-koeln.de [University Hospital of Cologne, Department of Diagnostic and Interventional Radiology (Germany); Pech, Maciej [Otto-von-Guericke University Medical School, Department of Radiology and Nuclear Medicine (Germany); Lux, Anke [Otto-von-Guericke University Medical School, Institute of Biometry and Medical Informatics (Germany); Ricke, Jens; Fischbach, Frank; Fischbach, Katharina [Otto-von-Guericke University Medical School, Department of Radiology and Nuclear Medicine (Germany)

    2017-06-15

    ObjectiveTo assess the feasibility of a hybrid approach employing MRI-guided bile duct (BD) puncture for subsequent fluoroscopy-guided biliary interventions in patients with non-dilated (≤3 mm) or dilated BD (≥3 mm) but unfavorable conditions for ultrasonography (US)-guided BD puncture.MethodsA total of 23 hybrid interventions were performed in 21 patients. Visualization of BD and puncture needles (PN) in the interventional MR images was rated on a 5-point Likert scale by two radiologists. Technical success, planning time, BD puncture time and positioning adjustments of the PN as well as technical success of the biliary intervention and complication rate were recorded.ResultsVisualization even of third-order non-dilated BD and PN was rated excellent by both radiologists with good to excellent interrater agreement. MRI-guided BD puncture was successful in all cases. Planning and BD puncture times were 1:36 ± 2.13 (0:16–11:07) min. and 3:58 ± 2:35 (1:11–9:32) min. Positioning adjustments of the PN was necessary in two patients. Repeated capsular puncture was not necessary in any case. All biliary interventions were completed successfully without major complications.ConclusionA hybrid approach which employs MRI-guided BD puncture for subsequent fluoroscopy-guided biliary intervention is feasible in clinical routine and yields high technical success in patients with non-dilated BD and/or unfavorable conditions for US-guided puncture. Excellent visualization of BD and PN in near-real-time interventional MRI allows successful cannulation of the BD.

  3. Ultrasound-guided percutaneous transhepatic biliary drainage: Experiences in 146 patients

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jai Keun [Sohwa Children' s Hospital, Seoul(Korea, Republic of); Yu, Jeong Sik; Kim, Ki Whang; Chung, Soo Yoon; Jeong, Mi Gyoung [Yonsei University College of Medicine, Seoul (Korea, Republic of); Choi, Deuk Lin; Kwon, Gui Hyang; Lee, Hae Kyung [Soonchunhyang University College of Medicine, Seoul (Korea, Republic of)

    1999-03-15

    Percutaneous biliary drainage is an important technique for palliative therapy of obstructive biliary disease and diagnostic information. The purpose of this study is to review and evaluate the experiences of ultrasound-guided percutaneous transhepatic biliary drainage. Ultrasound-guided percutaneous transhepatic biliary drainage was performed on 146 occasions in 134 patients. The causes of biliary obstruction were: benign diseases (19 cases, 14.2%) such as bile duct stones or stricture, cholangiocarcinoma (37 cases, 27.6%), pancreatic carcinoma (35 cases, 26.1%), metastasis (22 cases, 16.5%), gall bladder cancer (14 cases, 10.4%), ampulla of Vater cancer (4 cases, 3.0%), hepatocellular carcinoma (3 cases, 2.2%). Retrospectively reviewing medical records, we found out frequency of external or external/internal biliary drainages, puncture of left or right hepatic duct, and presence of bileinfection. Ultrasound-guided percutaneous transhepatic biliary drainage was compared with conventional biliary drainage of previous reports on the basis of frequency of complications. External (124 procedures, 84.9%) and external/internal biliary drainage (22 procedures, 15.1%) were carried out by puncture of dilated right (59.6%) or left (40.4%) intrahepatic duct. Sixty-nine complications occurred in 47 patients. Catheter related complications (33/69, 47.8%) were most common: catheter dislodgement (17/69, 24.6%), malfunction (9/69, 13.1%), leakage (7/69, 10.1%). Other minor complications such as simple fever (16/69, 23.2%), cholangitis (7/69, 10.1%), hemobilia (4/69, 5.8%), biloma (2/69, 2.9%) and wound infection (1/69, 1.5%) occurred. Major complications including sepsis (4/69, 5.8%) and bile peritonitis (2/69, 2.9%) were also noted. Puncture-related complications such as hemobilia, biloma and bile peritonitis occurred in 8 cases (5.5%). Comparing with conventional X-ray guided drainage, ultrasound-guided percutaneous transhepatic biliary drainage is a safe procedure for

  4. Study of DSA-guided percutaneous puncture location of foramen oval

    International Nuclear Information System (INIS)

    Zhao Xiaojun; He Jiawei; Bai Guanghui; Shi Jianjing; Xu Chongyong; Zhan Gonghao

    2008-01-01

    Objective: To study the technique of digital substraction angiography (DSA)-guided percutaneous puncture location of foramen oval. Methods: 39 cases of trigeminal neuralgia were included in the study from Feb. 2004 to Oct. 2006. The patients were punctured by the amending anterior position. The f0ramen oval was displayed by moving the tube tilted 20-28 degree to the caudal and 16-23 degree to the healthy side. The direction and depth of the needles was determined on the lateral view. Then, radio-frequency thermocoagulation therapy was performed. Results: The needles were located in oval foramen in all the patients. Pain disappeared in 36 cases, alleviated in other cases, and no serious complication occurred during therapy. Conclusions: Oval foramen locations by DSA can improve the successful rate of operation. The foramen oval can be clearly displayed by DSA-guided in amending position, with comfortable position for patients. (authors)

  5. Postpartum cortical venous thrombosis: An unusual presentation of postdural puncture headache

    Directory of Open Access Journals (Sweden)

    Opal Raj

    2016-01-01

    Full Text Available Headache is a common occurrence during pregnancy. A postural headache is invariably considered to be a postdural puncture headache in patients who receive neuraxial anesthesia with or without obvious or incidental dural puncture. Cerebral venous thrombosis (CVT is rare in pregnancy and in the postpartum period, with an incidence of 1:10,000–1:25,000. Pregnancy-induced changes in coagulation result in a hypercoagulable state, which may naturally reduce the incidence of postpartum hemorrhage, but may also increase the risk of CVT. Postpartum headache being frequently encountered may complicate the diagnosis of CVT. We report a case of a woman who developed a postpartum CVT after an accidental wet tap and intrathecal catheter placement during labor.

  6. Intraarterial digital subtraction angiography after plastic surgery by thin-needle puncture

    International Nuclear Information System (INIS)

    Langer, M.; Fiegler, W.; Claussen, C.; Koehler, D.; Felix, R.; Hepp, W.

    1984-01-01

    Over the period of a year (1983), 44 intraarterial digital subtraction angiographies (DSA) via direct thin-needle puncture of a vascular bypass or following vascular graft were carried the rough. The only complication that occured: paravasal injection, was clinically insignificant and could be avoided by a change in the puncture-technique. It was possible to carry through the investigation in out-patients. In all cases, diagnostically useful picture material for a possible surgical intervention was obtained. The pictures always were high-grade, independently of the patient's circulation time. Because this is a simple investigation and because of the small risk of complications, it has come to be regularly carried through as a routine in the authors' clinic. According to investigations carried through on the collective of patients of a vascular surgery department, occlusions or anastomotic aneurismus account for most of the angiological disorders. (orig.) [de

  7. Technical measurement of small fission gas inventory in fuel rod with laser puncturing system

    International Nuclear Information System (INIS)

    Kim, Hee Moon; Kim, Sung Ryul; Lee, Byoung Oon; Yang, Yong Sik; Baek, Sang Ryul; Song, Ung Sup

    2012-01-01

    The fission gas release cause degradation of fuel rod. It influences fuel temperature and internal pressure due to low thermal conductivity. Therefore, fission gas released to internal void of fuel rod must be measured with burnup. To measure amount of fission gas, fuel rod must be punctured by a steel needle in a closed chamber. Ideal gas law(PV=nRT) is applied to obtain atomic concentration(mole). Steel needle type is good for large amount of fission gas such as commercial spent fuel rod. But, some cases with small fuel rig in research reactor for R/D program are not available to use needle type because of large chamber volume. The laser puncturing technique was developed to solve measurement of small amount of fission gas. This system was very rare equipment in other countries. Fine pressure gage and strong vacuum system were installed, and the chamber volume was reduced at least. Fiber laser was used for easy operation

  8. Effect of puncture through frontal lobe in the treatment of intracranial hematoma

    Directory of Open Access Journals (Sweden)

    DOU Bo-sheng

    2013-12-01

    Full Text Available This study aims to discuss the effect of an easy puncture through frontal lobe in the treatment of deep brain hematoma. The lesions of 37 patients with basal ganglia hemorrhage were accurately positioned by CT scan. Drainage tube was placed in the center of hematoma through frontal lobe and blood was aspirated. Urokinase 30 × 103 U was injected in the hematoma postoperatively to promote the evacuation of hematoma. Postoperative CT scan showed more than 75% hematoma was cleared in all patients after 3-7 d. Two patients died of complications; 2 patients were severely disabled; 3 rebleeding happened. Almost 33 patients had a good recovery. Minimal invasion, convenient operation and exact location were the adventages of this puncture and it does not need complicated device.

  9. Posture and lumbar puncture headache: a controlled trial in 50 patients.

    OpenAIRE

    Handler, C E; Smith, F R; Perkin, G D; Rose, F C

    1982-01-01

    A prospective single blind trial in 50 patients was performed to investigate the effect of posture on post lumbar puncture headache (LPH). A difference between the frequency of headache at five hours between the two groups (prone for four hours, versus 30 degrees head down tilt for 30 minutes followed by supine posture for 3 1/2 hours) did not reach significance. These findings do not support the suggestion that a prone posture, by possibly reducing cerebrospinal fluid (CSF) leakage, signific...

  10. Effect of warm footbath with vibration on arteriovenous fistula puncture-related pain in hemodialysis patients

    OpenAIRE

    Zahra Abbas Ali Madadi; Jalil Azimian; Farzaneh Falahatpishe; Mahmoud Alipour Heidari

    2017-01-01

    Background: Pain and stress of hemodialysis are experienced by more than 50% of patients who are suffering from renal disease; hence decreasing a part of these adverse effects can be effective on individual’s long term coping with hemodialysis. The current study was done to determine the effect of warm footbath with vibration on arteriovenous fistula puncture-related pain in hemodialysis patients. Methods: This clinical trial was conducted on 31 hemodialysis patients in 2014. The patients ...

  11. Construction of Rate-Compatible LDPC Codes Utilizing Information Shortening and Parity Puncturing

    Directory of Open Access Journals (Sweden)

    Jones Christopher R

    2005-01-01

    Full Text Available This paper proposes a method for constructing rate-compatible low-density parity-check (LDPC codes. The construction considers the problem of optimizing a family of rate-compatible degree distributions as well as the placement of bipartite graph edges. A hybrid approach that combines information shortening and parity puncturing is proposed. Local graph conditioning techniques for the suppression of error floors are also included in the construction methodology.

  12. Development of Postdural Puncture Headache Following Therapeutic Acupuncture Using a Long Acupuncture Needle

    OpenAIRE

    Jo, Dae-Jean; Lee, Bong Jae; Sung, Joon Kyung; Yi, Jae-Woo

    2010-01-01

    Acupuncture appears to be a clinically effective treatment for acute and chronic pain. A considerable amount of research has been conducted to evaluate the role that acupuncture plays in pain suppression; however, few studies have been conducted to evaluate the side effects of the acupuncture procedure. This case report describes a suspected postdural puncture headache following acupuncture for lower back pain. Considering the high opening pressure, cerebrospinal fluid leakage, and the patien...

  13. Diagnostic Lumbar Puncture Among Children With Facial Palsy in a Lyme Disease Endemic Area.

    Science.gov (United States)

    Paydar-Darian, Niloufar; Kimia, Amir A; Lantos, Paul M; Fine, Andrew M; Gordon, Caroline D; Gordon, Catherine R; Landschaft, Assaf; Nigrovic, Lise E

    2017-06-01

    We identified 620 children with peripheral facial palsy of which 211 (34%) had Lyme disease. The 140 children who had a lumbar puncture performed were more likely to be hospitalized (73% LP performed vs 2% no LP) and to receive parenteral antibiotics (62% LP performed vs 6% no LP). © The Author 2016. Published by Oxford University Press on behalf of The Journal of the Pediatric Infectious Diseases Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  14. Magnetic resonance findings associated with intracranial hypotension. A report of three cases occurring after lumbar puncture

    International Nuclear Information System (INIS)

    Galan, J.; Vuelta, R. V.; Oleaga, L.; Grande, D.

    1999-01-01

    The magnetic resonance (MR) findings are presented for three patients who developed intracranial hypotension syndrome following lumbar puncture, one of the most common causes of this complication. All three patients presented the MR findings characteristically associated with this event, consisting of diffuse dural enhancement after administration of a paramagnetic contrast medium, as well as extraaxial collection that played either an accompanying or a causative role. (Author) 7 refs

  15. Effect of needle puncture and electro-acupuncture on mucociliary clearance in anesthetized quails

    Directory of Open Access Journals (Sweden)

    Wang Tianshan

    2006-02-01

    Full Text Available Abstract Background Acupuncture therapy for obstructive respiratory diseases has been effectively used in clinical practice and the acupuncture points or acupoints of Zhongfu and Tiantu are commonly-used acupoints to treat patients with the diseases. Since the impaired mucociliary clearance is among the most important features of airway inflammation in most obstructive respiratory diseases, the effect of needle puncture and electro-acupuncture at the specific acupoints on tracheal mucociliary clearance was investigated in anesthetized quails. Methods Mucociliary transport velocity on tracheal mucosa was measured through observing the optimal pathway, and fucose and protein contents in tracheal lavages were determined with biochemical methods. In the therapeutic group, needle puncture or electro-acupuncture stimulation to the acupoints was applied without or with constant current output in 2 mA and at frequency of 100 Hz for 60 minutes. In the sham group, electro-acupuncture stimulation to Liangmen was applied. Results Our present experiments demonstrated that the electro-acupuncture stimulation to Zhongfu and Tiantu significantly increased tracheal mucociliary transport velocity and decreased the content of protein in the tracheal lavage, compared with the control group. Moreover, either needle puncture or electro-acupuncture stimulation to Zhongfu and Tiantu significantly reverted the human neutrophil elastase-induced decrease in tracheal mucociliary transport velocity and human neutrophil elastase -induced increase in the contents of fucose and protein in the tracheal lavage, compared with the control group. Conclusion These results suggest that either needle puncture or electro-acupuncture stimulation to the effective acupoints significantly improves both airway mucociliary clearance and the airway surface liquid and that the improvements maybe ascribed to both the special function of the points and the substantial stimulation of electricity.

  16. Urinary Tract Infections.

    Science.gov (United States)

    Plummer, Nancy; Michael, Nancy, Ed.

    This module on urinary tract infections is intended for use in inservice or continuing education programs for persons who administer medications in long-term care facilities. Instructor information, including teaching suggestions, and a listing of recommended audiovisual materials and their sources appear first. The module goal and objectives are…

  17. Children's (Pediatric) Abdominal Ultrasound Imaging

    Medline Plus

    Full Text Available ... child's abdominal ultrasound examination. Doppler ultrasound , also called color Doppler ultrasonography, is a special ultrasound technique that ... and processes the sounds and creates graphs or color pictures that represent the flow of blood through ...

  18. Children's (Pediatric) Abdominal Ultrasound Imaging

    Medline Plus

    Full Text Available ... Physician Resources Professions Site Index A-Z Children's (Pediatric) Ultrasound - Abdomen Children’s (pediatric) ultrasound imaging of the ... abdomen using ultrasound. View full size with caption Pediatric Content Some imaging tests and treatments have special ...

  19. Children's (Pediatric) Abdominal Ultrasound Imaging

    Science.gov (United States)

    ... Physician Resources Professions Site Index A-Z Children's (Pediatric) Ultrasound - Abdomen Children’s (pediatric) ultrasound imaging of the ... abdomen using ultrasound. View full size with caption Pediatric Content Some imaging tests and treatments have special ...

  20. Children's (Pediatric) Abdominal Ultrasound Imaging

    Medline Plus

    Full Text Available ... News Physician Resources Professions Site Index A-Z Children's (Pediatric) Ultrasound - Abdomen Children’s (pediatric) ultrasound imaging of ... 30 minutes. top of page What will my child experience during and after the procedure? Ultrasound examinations ...

  1. The Indian ultrasound paradox

    OpenAIRE

    Akbulut-Yuksel, Mevlude; Rosenblum, Daniel

    2012-01-01

    The liberalization of the Indian economy in the 1990s made prenatal ultrasound technology affordable and available to a large fraction of the population. As a result, ultrasound use amongst pregnant women rose dramatically in many parts of India. This paper provides evidence on the consequences of the expansion of prenatal ultrasound use on sex-selection. We exploit state-by-cohort variation in ultrasound use in India as a unique quasi-experiment. We find that sex-selective abortion of female...

  2. Focused ultrasound in ophthalmology

    Directory of Open Access Journals (Sweden)

    Silverman RH

    2016-09-01

    Full Text Available Ronald H Silverman1,2 1Department of Ophthalmology, Columbia University Medical Center, 2F.L. Lizzi Center for Biomedical Engineering, Riverside Research, New York, NY, USA Abstract: The use of focused ultrasound to obtain diagnostically significant information about the eye goes back to the 1950s. This review describes the historical and technological development of ophthalmic ultrasound and its clinical application and impact. Ultrasound, like light, can be focused, which is crucial for formation of high-resolution, diagnostically useful images. Focused, single-element, mechanically scanned transducers are most common in ophthalmology. Specially designed transducers have been used to generate focused, high-intensity ultrasound that through thermal effects has been used to treat glaucoma (via cilio-destruction, tumors, and other pathologies. Linear and annular transducer arrays offer synthetic focusing in which precise timing of the excitation of independently addressable array elements allows formation of a converging wavefront to create a focus at one or more programmable depths. Most recently, linear array-based plane-wave ultrasound, in which the array emits an unfocused wavefront and focusing is performed solely on received data, has been demonstrated for imaging ocular anatomy and blood flow. While the history of ophthalmic ultrasound extends back over half-a-century, new and powerful technologic advances continue to be made, offering the prospect of novel diagnostic capabilities. Keywords: ophthalmic ultrasound, ultrasound biomicroscopy (UBM, high-intensity focused ultrasound (HIFU, ultrafast imaging, Doppler imaging 

  3. Automatic Ultrasound Scanning

    DEFF Research Database (Denmark)

    Moshavegh, Ramin

    on the user adjustments on the scanner interface to optimize the scan settings. This explains the huge interest in the subject of this PhD project entitled “AUTOMATIC ULTRASOUND SCANNING”. The key goals of the project have been to develop automated techniques to minimize the unnecessary settings...... on the scanners, and to improve the computer-aided diagnosis (CAD) in ultrasound by introducing new quantitative measures. Thus, four major issues concerning automation of the medical ultrasound are addressed in this PhD project. They touch upon gain adjustments in ultrasound, automatic synthetic aperture image...

  4. General Ultrasound Imaging

    Medline Plus

    Full Text Available ... internal organs, as well as blood flowing through blood vessels. Ultrasound imaging is a noninvasive medical test that helps physicians diagnose and treat medical conditions. ...

  5. Point of Care Ultrasound

    DEFF Research Database (Denmark)

    Dietrich, Christoph F; Goudie, Adrian; Chiorean, Liliana

    2017-01-01

    Over the last decade, the use of portable ultrasound scanners has enhanced the concept of point of care ultrasound (PoC-US), namely, "ultrasound performed at the bedside and interpreted directly by the treating clinician." PoC-US is not a replacement for comprehensive ultrasound, but rather allows...... and critical care medicine, cardiology, anesthesiology, rheumatology, obstetrics, neonatology, gynecology, gastroenterology and many other applications. In the future, PoC-US will be more diverse than ever and be included in medical student training....

  6. Ultrasound skin tightening.

    Science.gov (United States)

    Minkis, Kira; Alam, Murad

    2014-01-01

    Ultrasound skin tightening is a noninvasive, nonablative method that allows for energy deposition into the deep dermal and subcutaneous tissue while avoiding epidermal heating. Ultrasound coagulation is confined to arrays of 1-mm(3) zones that include the superficial musculoaponeurotic system and connective tissue. This technology gained approval from the Food and Drug Administration as the first energy-based skin "lifting" device, specifically for lifting lax tissue on the neck, submentum, and eyebrows. Ultrasound has the unique advantage of direct visualization of treated structures during treatment. Ultrasound is a safe and efficacious treatment for mild skin tightening and lifting. Copyright © 2014 Elsevier Inc. All rights reserved.

  7. Clinical observation of Ahmed glaucoma valve implantation for refractory glaucoma by directly puncturing the sclerotic tunnel

    Directory of Open Access Journals (Sweden)

    Zhi-Ke Xu

    2015-02-01

    Full Text Available AIM: To observe the clinic effects and complication of Ahmed glaucoma valve(AGVimplantation in refractory glaucoma by using the 23G syringe needle direct puncture the sclerotic tunnel.METHODS: Forty-four cases(44 eyesof refractory glaucoma underwent AGV implantation by useing the 23G syringe needle direct puncture the sclerotic tunnel. The intraocular pressure(IOP, visual acuity, and complication of post-operation were contrasted with those of pre-operation. RESULTS:The success rate was 84.1%, the mean preoperative IOP in research group was 52.1±10.1mmHg, and the last follow up mean IOP was 15.6±6.9mmHg. Compared with the preoperative visual acuity, 11 eyes increased, 27 eyes had no changes and 6 eyes decreased. The main post-operative complications included shallow anterior chamber(4 eyes, choroidal detachment(3 eyes, drainage tube shift(1 eye, hyphema(6 eyes, drainage tube blockage(1 eye, expulsive choroidal hemorrhage(1 eye, and fiber wrap of drainage tray(5 eyes.CONCLUSION: AGV implantation by direct puncture the sclerotic tunnel is feasible and easy. It avoids of making sclerotic petal and the xenogenic sclera transplanting, simplified the operation technique, prevent the leakage of around tube. The shallow anterior chamber rate is lower. It is an effective procedure for refractory glaucoma.

  8. CT fluoroscopy-assisted puncture of thoracic and abdominal masses: a randomized trial.

    Science.gov (United States)

    Kirchner, Johannes; Kickuth, Ralph; Laufer, Ulf; Schilling, Esther Maria; Adams, Stephan; Liermann, Dieter

    2002-03-01

    We investigated the benefit of real-time guidance of interventional punctures by means of computed tomography fluoroscopy (CTF) compared with the conventional sequential acquisition guidance. In a prospective randomized trial, 75 patients underwent either CTF-guided (group A, n = 50) or sequential CT-guided (group B, n = 25) punctures of thoracic (n = 29) or abdominal (n = 46) masses. CTF was performed on the CT machine (Somatom Plus 4 Power, Siemens Corp., Forchheim, Germany) equipped with the C.A.R.E. Vision application (tube voltage 120 kV, tube current 50 mA, rotational time 0.75 s, slice thickness 10 mm, 8 frames/s). The average procedure time showed a statistically significant difference between the two study groups (group A: 564 s, group B 795 s, P = 0.0032). The mean total mAs was 7089 mAs for the CTF and 4856 mAs for the sequential image-guided intervention, respectively. The sensitivity was 71% specificity 100% positive predictive value 100% and negative predictive value 60% for the CTF-guided puncture, and 68, 100, 100 and 50% for sequential CT, respectively. CTF guidance realizes a time-saving but increases the radiation exposure dosage.

  9. Correlation of Descriptive Analysis and Instrumental Puncture Testing of Watermelon Cultivars.

    Science.gov (United States)

    Shiu, J W; Slaughter, D C; Boyden, L E; Barrett, D M

    2016-06-01

    The textural properties of 5 seedless watermelon cultivars were assessed by descriptive analysis and the standard puncture test using a hollow probe with increased shearing properties. The use of descriptive analysis methodology was an effective means of quantifying watermelon sensory texture profiles for characterizing specific cultivars' characteristics. Of the 10 cultivars screened, 71% of the variation in the sensory attributes was measured using the 1st 2 principal components. Pairwise correlation of the hollow puncture probe and sensory parameters determined that initial slope, maximum force, and work after maximum force measurements all correlated well to the sensory attributes crisp and firm. These findings confirm that maximum force correlates well with not only firmness in watermelon, but crispness as well. The initial slope parameter also captures the sensory crispness of watermelon, but is not as practical to measure in the field as maximum force. The work after maximum force parameter is thought to reflect cellular arrangement and membrane integrity that in turn impact sensory firmness and crispness. Watermelon cultivar types were correctly predicted by puncture test measurements in heart tissue 87% of the time, although descriptive analysis was correct 54% of the time. © 2016 Institute of Food Technologists®

  10. Experimental impact and puncture evaluation of the prototype quarter scale TRU transporter package

    International Nuclear Information System (INIS)

    Meyer, R.J.; Plonski, B.A.; Vigil, M.G.; Joseph, B.J.

    1983-01-01

    The impact tests consist of the TRUPACT model free-falling 9 meters onto a flat, horizontal, unyielding surface as specified in 10CFR71. The model was dropped at five different orientations including: (1) flat on the door end; (2) flat on the side; (3) center of gravity over impact corner; (4) flat on edge; and (5) corner impact edge slapdown. The model instrumentation for these tests included: (1) sixty strain gages located throughout the model structure used to obtain impact stresses; (2) three displacement transducers used to measure relative motion between the inner door and inner cavity frame structure (seal integrity); and (3) two triaxial accelerometers used to estimate the impact forces on the inner and outer frame structures. The drop/puncture tests consisted of the TRUPACT-I model free-falling one meter onto a 38-millimeter (1.5-inch) diameter mild steel punch 0.9 meters (36 inches) long. The punch was welded to an unyielding surface. Model drop/puncture orientations included: (1) flat on the model sides; (2) flat on the door and back ends; and (3) model center of gravity over impact point at various locations of the model (door end, back end, near door seals, near tubular frame structure, center of panels). The test results and subsequent analysis of the data have been used to support the final design of TRUPACT-I and to determine the most damaging impact and puncture orientations for testing the full scale prototype

  11. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... Urinary Tract? Your urinary tract is actually a system made up of these main parts: two kidneys ... topic for: Kids Chronic Kidney Diseases Movie: Urinary System Your Urinary System Bedwetting View more Partner Message ...

  12. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... Urinary Tract? Your urinary tract is actually a system made up of these main parts: two kidneys ... topic for: Kids Chronic Kidney Diseases Movie: Urinary System Your Urinary System Bedwetting View more About Us ...

  13. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... an infection somewhere in your urinary tract. Let's find out more. What Exactly Is a Urinary Tract? ... bladder, your brain tells you it's time to find a bathroom. Once you're ready to pee, ...

  14. 500 Cities: Census Tract Boundaries

    Data.gov (United States)

    U.S. Department of Health & Human Services — This census tract shapefile for the 500 Cities project was extracted from the Census 2010 Tiger/Line database and modified to remove portions of census tracts that...

  15. Urinary Tract Infections (For Kids)

    Medline Plus

    Full Text Available ... Staying Safe Videos for Educators Search English Español Urinary Tract Infections (UTIs) KidsHealth / For Kids / Urinary Tract Infections (UTIs) What's in this article? What Exactly Is ...

  16. Usefulness of Ultrasound Examinations in the Diagnostics of Necrotizing Enterocolitis

    International Nuclear Information System (INIS)

    Staryszak, Joanna; Stopa, Joanna; Kucharska-Miąsik, Iwona; Osuchowska, Magdalena; Guz, Wiesław; Błaż, Witold

    2015-01-01

    Necrotizing enterocolitis (NEC) is one of the most serious disorders of gastrointestinal tract during neonatal period. Early diagnosis and adequate treatment are essential in the presence of clinical suspicion of NEC. Plain abdominal radiography is currently the modality of choice for initial evaluation of gastrointestinal tract in neonates. However, when the diagnosis is uncertain, abdominal ultrasound with bowel assessment might be an important complementary examination. The aim of the study was to evaluate usefulness of ultrasound in the diagnosis of NEC and its value for implementation of proper treatment. The data of nine neonates diagnosed with NEC, hospitalized at the Provincial Hospital No. 2 in Rzeszow in the period from September 2009 to April 2013 was retrospectively analyzed. Apart from abdominal radiography, abdominal ultrasound with bowel assessment was performed in all nine cases. Imaging findings, epidemiological data, coexisting risk factors and disease course were assessed. Most children in the group were preterm neonates. Findings in plain abdominal radiography were normal or nonspecific. A wider spectrum of findings was demonstrated in all ultrasound examinations and intestinal pneumatosis, a pathognomonic sign for NEC, was more frequently noted than in plain abdominal x-ray. Most children were treated by surgical intervention with resection of necrotic bowel loops and in more than half of the cases location of changes identified during surgery was concordant with ultrasonographic findings. Abdominal ultrasound examination might be helpful in the diagnosis of NEC, especially when plain abdominal radiography findings do not correlate with clinical symptoms. However, abdominal radiography is still considered the modality of choice. The range of morphological changes detectable on ultrasound examination is much wider than in plain abdominal radiography. Ultrasound examination allows for more accurate assessment of changes within intestines and

  17. Clinical application of percutaneous lumbar puncture to treat sciatica caused by lumbar disc herniation under CT guidance

    International Nuclear Information System (INIS)

    Wang Linyou; Li Yuan; Shao Yangtong

    2004-01-01

    Objective: To evaluate the effect of the percutaneous lumbar puncture to treat sciatica caused by lumbar disc herniation. Methods: 75 cases of lumbar disc herniation with significant clinical signs were confirmed by CT scan. The technique of the percutaneous lumbar puncture led the needle to approach nerve root and injected medicine diffusing into extraduramater, and then relieved the symptom of sciatica. Results: The rate of success of percutaneous lumbar puncture guided by CT reached to 100%. After two weeks of follow-up, the symptom of pain was obviously improved and disappeared in 63.3% cases. There were 23.0% cases needed a second procedure, and no change was obsesved in 9.3% cases. Conclusions: The percutaneous lumbar puncture guided by CT to treat sciatica resulted from lumbar disc herniation is one of the safe, reliable, effective new methods with no complication. The long term effectiveness is still in need of investigation. (authors)

  18. Prevalence of upper urinary tract anomalies in hospitalized premature infants with urinary tract infection.

    Science.gov (United States)

    Vachharajani, A; Vricella, G J; Najaf, T; Coplen, D E

    2015-05-01

    The 2011 American Academy of Pediatrics (AAP) guidelines address imaging after initial febrile urinary tract infection (UTI) in infants >2 months of age. We sought to determine the frequency of upper urinary tract anomalies (hydronephrosis and vesicoureteral reflux (VUR)) in hospitalized premature infants with UTI. We retrospectively reviewed the electronic medical records of neonatal intensive care unit (NICU) admissions at a tertiary care children's hospital between 1 January 2006 and 31 December 2010. We queried the records for UTI, renal ultrasound (US) and voiding cystourethrogram (VCUG). We identified 3518 unique admissions. UTI occurred in 118 infants (3%). Sixty-nine (60%) had a normal US. Renal dilation was predominantly renal pelvic dilation (12%) and isolated caliectasis (22%). VUR was identified in 15 (14%) infants evaluated with a VCUG. VUR was identified in nine (12%) infants without and in seven (16%) with an abnormality on US. Reflux was identified in 7% of male and 38% of female infants with a UTI. Anatomic abnormalities of the upper urinary tract are uncommon in premature infants with a UTI that occurs during neonatal hospitalization. In concordance with the AAP guidelines, a VCUG may not be required in all NICU infants under age 2 months after a single UTI.

  19. Does the real-time ultrasound guidance provide safer venipuncture in implantable venous port implantation?

    Science.gov (United States)

    Yıldırım, İlknur; Tütüncü, Ayşe Çiğdem; Bademler, Süleyman; Özgür, İlker; Demiray, Mukaddes; Karanlık, Hasan

    2018-03-01

    To examine whether the real-time ultrasound-guided venipuncture for implantable venous port placement is safer than the traditional venipuncture. The study analyzed the results of 2153 venous ports placed consecutively from January 2009 to January 2016. A total of 922 patients in group 1 and 1231 patients in group 2 were admitted with venous port placed using the traditional landmark subclavian approach and real-time ultrasound-guided axillary approach, respectively. Sociodemographic characteristics of patients, early (pneumothorax, pinch-off syndrome, arterial puncture, hematoma, and malposition arrhythmia) and late (deep vein thrombosis, obstruction, infection, erosion-dehiscence, and rotation of the port chamber) complications and the association of these complications with the implantation method were evaluated. There were no significant differences in the sociodemographic characteristics of the patients between the two groups. The overall and early complications in group 2 were significantly lower than those in group 1. Pinch-off syndrome only developed in group 1. Seven patients and two patients had pneumothorax in groups 1 and 2, respectively. Puncture number was significantly associated with the development of the overall complications. The ultrasound-guided axillary approach may be preferred as a method to reduce the risk of both early and late complications. Large, randomized, controlled prospective trials will be helpful in determining a safer implantable venous port implantation technique.

  20. Recurrent uncomplicated urinary tract infections in women: a review.

    Science.gov (United States)

    Nosseir, Sandy B; Lind, Lawrence R; Winkler, Harvey A

    2012-03-01

    Recurrent urinary tract infections most often present with symptoms of irritative voiding. In most cases, they are caused by reinfection with a previously isolated organism. Patients with one or more symptoms of uncomplicated recurrent urinary tract infection should undergo thorough examination and screening for underlying comorbidities that increase susceptibility. When frequent reinfections, empiric treatment relapse, persistent infections, or risk factors for complicated infections are encountered, patients may benefit from urodynamics, cystoscopy, renal ultrasound, intravenous urogram, or voiding cystourethrogram to evaluate for anatomic, functional, or metabolic abnormalities affecting the urinary tract (e.g., stones, stricture, obstruction, vesicoureteral reflux, lesions, detrusor underactivity). These patients may benefit from culture-guided empiric treatment and further evaluation by urology, nephrology, or infectious disease specialists. In patients with a history of uncomplicated urinary tract infections, empiric treatment guided by local antimicrobial resistance may efficiently treat a suspected recurrence. After successful treatment of the acute infection, postcoital prophylaxis, continuous prophylaxis, or self-start empiric treatment may be selected based on frequency of recurrent infections, temporal relation to intercourse, and patient characteristics. Ancillary measures such as probiotics, cranberry products, or local estrogen replacement may also be considered. This article will review the current definition, epidemiology, pathogenesis, diagnosis, work-up, treatment, treatment side effects, and prevention of recurrent urinary tract infections in women. A suggested algorithm for evaluation and treatment based on current literature is provided.