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Sample records for azygos vein

  1. Anomalous azygos vein: a potential danger during endoscopic thoracic sympathectomy.

    Science.gov (United States)

    Sieunarine, K; May, J; White, G H; Harris, J P

    1997-08-01

    A report of a patient with an azygos lobe and an associated anomalous azygos vein covering the upper thoracic sympathetic chain. This anomaly poses a significant risk during the procedure of endoscopic thoracic sympathectomy. A chest X-ray is useful in detecting this anomaly and alerting the surgeon to potential problems. PMID:9287933

  2. Azygos Vein Aneurysm as a Posterior Mediastinal Mass Discovered After Minor Chest Trauma

    International Nuclear Information System (INIS)

    Azygos vein aneurysm is a rare cause of a posterior or paratracheal mediastinal mass. Trauma or conditions causing elevated flow or pressure in the azygos system, such as cardiac failure or cirrhosis of the liver are secondary causes of aneurysm of the azygos vein. We report a case of asymptomatic saccular aneurysm of the azygos vein in a 45-year-old man with blunt minor chest trauma. The azygos vein aneurysm was managed by conservative treatment

  3. ATYPIC DRAINAGE PATTERN OF POSTERIOR INTERCOSTAL VEINS INTO THE AZYGOS VENOUS SYSTEM

    Directory of Open Access Journals (Sweden)

    Rimpi Gupta

    2014-12-01

    Full Text Available The azygos venous system vary greatly in their mode of origin, course,tributaries, anastomoses and termination which resulst predominantly due to its complex embryological development. Azygos venous system develops as right and left azygos venous lines. Right azygos venous line develops into vertical part of azygos vein whereas the left one develops into accessory hemiazygos and inferior hemiazygos veins. These are connected by subcentral/ transvertebral veins. In the present case, we found an atypic drainage pattern of posterior intercostal veins into azygos venous system, left being more variable. Right superior intercostal vein formed by 2nd and 3rd posterior intercostal veins whereas left superior intercostal vein was found to be absent. 2nd, 3rd, 4th & 5th left posterior intercostal veins thus drained into accessory hemiazygos vein. Sixth and seventh left PICVs formed a common trunk with accessory hemiazygous vein and drained into the azygous vein at T6 level. Eighth one united with the hemiazygos vein and formed a common trunk which drained into azygos vein at T8 level. Such variations of the azygos venous system are important for a clinician during mediastinal surgeries to prevent inadvertent hemorrhagic complications.

  4. Blood flow, substrate utilization and heat generation in tissues drained by the azygos vein in man.

    Science.gov (United States)

    Brundin, T; Hagenfeldt, L; Söderberg, R; Wahren, J

    1987-12-01

    The present study was undertaken to examine the blood flow, heat generation and substrate utilization in tissues drained by the azygos vein in healthy subjects. Catheters were inserted percutaneously into the azygos vein and the pulmonary artery in 10 healthy male subjects in the basal, post-absorptive state. Blood flow in the azygos vein was measured by thermodilution technique, blood temperature was recorded in both the azygos vein and the pulmonary artery and blood samples for the determination of oxygen content and substrate concentrations were collected from both vessels repeatedly at timed intervals. Free fatty acid (FFA) exchange was evaluated following the intravenous infusion of 14-C labelled oleic acid. The average azygos vein blood flow was 94 +/- 10 ml/min. The coefficient of variation for the flow determination was 3.6%. The blood temperature in the azygos vein was consistently higher than that in the pulmonary artery, indicating an average calculated net heat production in the tissues of 0.5 W. The oxygen uptake to the tissues drained by the azygos vein amounted to 6 +/- 1 ml/min. Significant amounts of glucose, FFA and ketone bodies were taken up in the azygos area, while both glycerol and FFA were released. The FFA uptake could, if oxidized, account for about half of the oxygen uptake. In conclusion, the findings indicate that, in the basal state, the tissues drained by the azygos vein utilize both glucose and FFA. Heat is generated within the area but the rate of generation is low and can largely be explained by the oxidative metabolism. The findings do not support an important role for brown adipose tissue metabolism in the interscapular region in man. PMID:3427881

  5. Infrahepatic inferior caval and azygos vein formation in mammals with different degrees of mesonephric development.

    Science.gov (United States)

    Hikspoors, Jill P J M; Mekonen, Hayelom K; Mommen, Greet M C; Cornillie, Pieter; Köhler, S Eleonore; Lamers, Wouter H

    2016-03-01

    Controversies regarding the development of the mammalian infrahepatic inferior caval and azygos veins arise from using topography rather than developmental origin as criteria to define venous systems and centre on veins that surround the mesonephros. We compared caudal-vein development in man with that in rodents and pigs (rudimentary and extensive mesonephric development, respectively), and used Amira 3D reconstruction and Cinema 4D-remodelling software for visualisation. The caudal cardinal veins (CCVs) were the only contributors to the inferior caval (IVC) and azygos veins. Development was comparable if temporary vessels that drain the large porcine mesonephros were taken into account. The topography of the CCVs changed concomitant with expansion of adjacent organs (lungs, meso- and metanephroi). The iliac veins arose by gradual extension of the CCVs into the caudal body region. Irrespective of the degree of mesonephric development, the infrarenal part of the IVC developed from the right CCV and the renal part from vascular sprouts of the CCVs in the mesonephros that formed 'subcardinal' veins. The azygos venous system developed from the cranial remnants of the CCVs. Temporary venous collaterals in and around the thoracic sympathetic trunk were interpreted as 'footprints' of the dorsolateral-to-ventromedial change in the local course of the intersegmental and caudal cardinal veins relative to the sympathetic trunk. Interspecies differences in timing of the same events in IVC and azygos-vein development appear to allow for proper joining of conduits for caudal venous return, whereas local changes in topography appear to accommodate efficient venous perfusion. These findings demonstrate that new systems, such as the 'supracardinal' veins, are not necessary to account for changes in the course of the main venous conduits of the embryo. PMID:26659476

  6. Resolution of Large Azygos Vein Aneurysm Following Stent-Graft Shunt Placement in a Patient with Ehlers-Danlos Syndrome Type IV

    International Nuclear Information System (INIS)

    Ehlers-Danlos syndrome (EDS) type IV is a rare connective tissue disorder associated with thin-walled, friable arteries and veins predisposing patients to aneurysm formation, dissection, fistula formation, and vessel rupture. Azygos vein aneurysm is an extremely rare condition which has not been reported in association with EDS in the literature. We present a patient with EDS type IV and interrupted inferior vena cava (IVC) with azygos continuation who developed an azygos vein aneurysm. In order to decrease flow through the azygos vein and reduce the risk of aneurysm rupture, a stent-graft shunt was created from the right hepatic vein to the azygos vein via a transhepatic, retroperitoneal route. At 6 month follow-up the shunt was open and the azygos vein aneurysm had resolved

  7. The morphology and cell culture of the striated musculature of the rat azygos vein.

    Science.gov (United States)

    Cullinan, V; Campbell, J H; Mosse, P R; Campbell, G R

    1986-01-01

    The azygos vein of the rat can be divided into three regions: The proximal cardiac region, where the wall is composed of two and sometimes three layers of cardiac muscle and a thin discontinuous layer of smooth muscle cells. Vascular casts of this region demonstrate layers of capillaries closely following the orientation of the cardiac fibres. A transitional zone, where both cardiac and smooth muscle cells interdigitate. In this zone, close associations between smooth muscle and cardiac muscle cells can be observed, however, gap junctions do not appear to be present. Beyond this transitional zone the vessel resembles a typical thin-walled vein. The cells of the media of the entire length of azygous vein have been isolated and grown in culture and two separate viable populations identified corresponding to smooth and cardiac muscle. PMID:3510740

  8. Posterior Nutcracker Syndrome Associated with Interrupted Left Inferior Vena Cava with Azygos Continuation and Retroaortic Right Renal Vein

    OpenAIRE

    Luo, Xiao-Li; Qian, Gen-Nian; Xiao, Hui; Zhao, Chun-Lei; Zhou, Xiao-Dong

    2012-01-01

    Various anatomic anomalies have been considered the causes of nutcracker syndrome (NCS). Posterior NCS refers to the condition, in which vascular narrowing was secondary to the compression of the retroaortic left renal vein while it is crossing between the aorta and the vertebral column. Here, we report an unusual case of posterior NCS associated with a complicated malformation of the interrupted left inferior vena cava with azygos continuation and retroaortic right renal vein, diagnosed by b...

  9. Posterior Nutcracker Syndrome Associated with Interrupted Left Inferior Vena Cava with Azygos Continuation and Retroaortic Right Renal Vein

    International Nuclear Information System (INIS)

    Various anatomic anomalies have been considered the causes of nutcracker syndrome (NCS). Posterior NCS refers to the condition, in which vascular narrowing was secondary to the compression of the retroaortic left renal vein while it is crossing between the aorta and the vertebral column. Here, we report an unusual case of posterior NCS associated with a complicated malformation of the interrupted left inferior vena cava with azygos continuation and retroaortic right renal vein, diagnosed by both color Doppler ultrasonography and CT angiography.

  10. Central venous catheter malposition in the azygos vein and difficult endotracheal intubation in severe ankylosing spondylitis: a case report

    OpenAIRE

    Moon, Eunjin; Jeong, Hyungmo; Chung, Junyoung; Yi, Jaewoo

    2015-01-01

    Ankylosing spondylitis (AS) can be challenging for anesthesiologists because central venous access can be difficult, and the airway can be blocked due to the fixed flexion deformity of the spine. In this case, we attempted central access via the right subclavian vein, but the catheter was repeatedly inserted into the azygos vein, which was confirmed by radiology. After several attempts, the catheter position was corrected at the superior vena cava-atrial junction. Although several useful devi...

  11. Percutaneous embolization of a giant collateral vessel originating from the azygos vein via the inferior vena cava.

    Science.gov (United States)

    Witzke, Christian; Bhatt, Ami; Inglessis, Ignacio

    2013-11-15

    We present the case of a 45-year-old man with univentricular heart, small outlet chamber, and L-transposition of the great vessels. As an infant, the patient underwent multiple palliative surgical interventions. He presented with worsening dyspnea and fatigue and was found to have systemic oxygen saturation of 85% on 2 L of oxygen by nasal cannula, whereas he had chronically remained between 90 and 95% throughout most of adulthood. There was no evidence of significant valvular regurgitation or stenosis, nor was there an overt intracardiac shunt by echocardiography. Cardiac CT and cardiac MRI revealed a large serpiginous systemic to pulmonary venovenous collateral located behind the left atrium. The collateral drained into the lower right pulmonary vein as it entered the left atrium. The tributary veins to the "giant" collateral were determined by these images modalities. The patient underwent a percutaneous embolization of this giant venovenous collateral via a remnant supracardinal vein originating from the infrarenal inferior vena cava using two Amplatzer Vascular Plug II. Immediately after the procedure the patient's oxygen saturation increased to 90% on room air at rest. At 2 months follow-up the patient had a marked clinical improvement with oxygen saturation as high as 95% on room air while walking. Our case illustrates a successful embolization of a giant collateral via an embryological venous remnant connecting the IVC to the azygos system. PMID:22936600

  12. Pleural effusion and azygos lobe

    Energy Technology Data Exchange (ETDEWEB)

    Neufang, K.F.R.; Buelo, W.

    1981-11-01

    In patients with azygos lobe a right-sided hemopneumothorax can mimic upper mediastinal widening if in recumbent position the fluid can gather in the azygos lobe recess. The right lateral decubitus view with the horizontal beam will show fluid levels in the azygos region thus giving the correct diagnosis.

  13. Pleural effusion and azygos lobe

    International Nuclear Information System (INIS)

    In patients with azygos lobe a right-sided hemopneumothorax can mimic upper mediastinal widening if in recumbent position the fluid can gather in the azygos lobe recess. The right lateral decubitus view with the horizontal beam will show fluid levels in the azygos region thus giving the correct diagnosis. (orig.)

  14. Azygos Tip Placement for Hemodialysis Catheters in Patients with Superior Vena Cava Occlusion

    International Nuclear Information System (INIS)

    Chronic central venous access is necessary for numerous life-saving therapies. Repeated access is complicated by thrombosis and occlusion of the major veins, such as the superior vena cava (SVC), which then require novel vascular approaches if therapy is to be continued. We present two cases of catheterization of the azygos system in the presence of an SVC obstruction. We conclude that the azygos vein may be used for long-term vascular access when other conduits are unavailable and that imaging studies such as magnetic resonance venography, contrast-enhanced computed tomography or conventional venography can be employed prior to the procedure to aid with planning and prevent unforeseen complications

  15. Effect of oral propranolol administration on azygos, renal and hepatic uptake and output of catecholamines in cirrhosis

    DEFF Research Database (Denmark)

    Bendtsen, Flemming; Christensen, N J; Sørensen, T I;

    1991-01-01

    Circulating catecholamines are increased in cirrhosis with portal hypertension, and increase further after propranolol. In 23 cirrhotic patients, plasma norepinephrine and epinephrine were determined in an artery, the azygos vein, the right renal vein and a hepatic vein before and after an oral 80......-mg dose of propranolol. Baseline azygos and renal venous norepinephrine levels were significantly higher than arterial norepinephrine levels (+20%, p less than 0.005; and +28%, p less than 0.001, respectively). Hepatic venous norepinephrine and all venous epinephrine values were below the arterial...... values (all p less than 0.05). After propranolol intake, arterial norepinephrine and epinephrine increased (+16%, p less than 0.01; and +93%, p less than 0.001, respectively). Significant increases in norepinephrine and epinephrine were found in azygos and renal veins (all p less than 0.01), whereas...

  16. Thoracoscopic sympathetic clamping in a patient with an azygos fissure.

    Science.gov (United States)

    Moon, Seok Whan; Yoon, Jeong Sub; Jo, Keon Hyeon; Wang, Young Pil; Park, Hyeon Jin

    2005-04-01

    We believe that an azygos fissure may predispose to bleeding during thoracoscopic surgery. An azygos fissure causes important morphologic changes in the superior mediastinum and thereby poses a risk of massive bleeding during thoracoscopic procedures. We report on a successful thoracoscopic procedure conducted in a patient with palmar hyperhidrosis and an azygos fissure and emphasize that the course of the thoracic sympathetic chain runs laterally along the base of the azygos fissure. PMID:15821627

  17. Azygos system on multi detector computed tomography: Pictorial essay

    International Nuclear Information System (INIS)

    Since three dimensional and reformatted CT images can show changes in the location and size of the azygos system, changes in the surrounding vessels, and combined anomalies of vessels or organs, CT is useful for diagnosing congenital and acquired abnormalities of the azygos system. In this article, we review CT findings in regards to various disorders involving the azygos system

  18. [Medullary venous malformation with azygos anterior cerebral artery aneurysm: a case report].

    Science.gov (United States)

    Harada, K; Kobayashi, S; Sigemori, M; Watanabe, M; Kuramoto, S

    1987-03-01

    A case of medullary venous malformation with azygos anterior cerebral artery aneurysm is reported, which was associated with the leptomenigeal angiomatosis on the cortex of the right frontal lobe. A 62-year-old female was admitted to the Kurume University Hospital on June 21, 1985, because of a convulsive seizure. On admission, neurological and general examinations, except for slightly liver function disorder, was no abnormality. Plain CT scan showed the cortical atrophy and two small high-density areas in the right frontal lobe. Enhanced CT scan showed a high-density area in the genu of the corpus callosum. MRI (magnetic resonance imaging), on T2 weighted image, showed a high signal intensity area in the right paraventricular deep white matter and the right frontal region. A right internal carotid angiogram in the venous phase showed numerous enlarged medullary veins in the deep frontal region, converging into a single large draining vein that empties into the basal vein of Rosenthal. An azygos anterior cerebral artery was visualized on the right and left carotid angiograms. The aneurysm was situated at the distal end of the azygos artery. Twenty eight days after admission, a right frontal cranioplastic craniotomy was performed. During operation, the surface of the right frontal lobe was covered by fine, vascular networks, which was reddish brown. A right frontal lobectomy, including venous malformation and vascular networks, was performed. The aneurysm was clipped via an interhemispheric approach. Histologically, the malformation vessels had spread into the subarachnoid space.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:3600991

  19. Spontaneous pneumothorax in a patient with an azygos lobe

    OpenAIRE

    Sadikot, R. T.; Cowen, M E; Arnold, A G

    1997-01-01

    The association between a spontaneous pneumothorax and an azygos lobe is surprisingly rare. A case is reported in which surgical management was difficult; it is suggested that thoracotomy is preferable to video- assisted thoracoscopic surgery in this situation. It is possible that the presence of an azygos lobe might protect against the subsequent development of a spontaneous pneumothorax, and the possible mechanism of this is discussed. 






  20. Normal azygos arch: retrotracheal visualization on frontal chest tomograms.

    Science.gov (United States)

    Austin, J H; Thorsen, M K

    1981-12-01

    Anteroposterior, linear tomograms of 78 adult subjects in the supine position revealed visualization of pleural reflections off the retrotracheal part of the normal azygos arch in 38 (49%). The course of the arch varied by about 3 cm. Five distinct patterns were found, mainly depending on the course of the inferior margin of the arch. The inferior margin varied from relatively superior retrotracheal positions to intermediate positions appearing to intersect the carina, to relatively inferior and right-sided positions posterior to the proximal right main bronchus. Recognition of these normal variations of the azygos arch should serve to differentiate them from abnormalities in this region. PMID:6976093

  1. Normal azygos arch: retrotracheal visualization on frontal chest tomograms

    International Nuclear Information System (INIS)

    Anteroposterior, linear tomograms of 78 adult subjects in the supine position revealed visualization of pleural reflections off the retrotracheal part of the normal azygos arch in 38 (49%). The course of the arch varied by about 3 cm. Five distinct patterns were found, mainly depending on the course of the inferior margin of the arch. The inferior margin varied from relatively superior retrotracheal positions to intermediate positions appearing to intersect the carina, to relatively inferior and right-sided positions posterior to the proximal right main bronchus. Recognition of these normal variations of the azygos arch should serve to differentiate them from abnormalities in this region

  2. Normal azygos arch: retrotracheal visualization on frontal chest tomograms

    Energy Technology Data Exchange (ETDEWEB)

    Austin, J.H.M. (Columbia-Presbyterian Medical Center, New York); Thorsen, M.K.

    1981-12-01

    Anteroposterior, linear tomograms of 78 adult subjects in the supine position revealed visualization of pleural reflections off the retrotracheal part of the normal azygos arch in 38 (49%). The course of the arch varied by about 3 cm. Five distinct patterns were found, mainly depending on the course of the inferior margin of the arch. The inferior margin varied from relatively superior retrotracheal positions to intermediate positions appearing to intersect the carina, to relatively inferior and right-sided positions posterior to the proximal right main bronchus. Recognition of these normal variations of the azygos arch should serve to differentiate them from abnormalities in this region.

  3. Anomalous azygos venous system in a south Indian cadaver: a case report

    OpenAIRE

    Quadros, Lydia S; Potu, Bhagath Kumar; Guru, Anitha; Pulakunta, Thejodhar; Ray, Biswabina; D'Silva, Suhani Sumalatha; Sequeira, Sylvia; Thomas, Huban

    2009-01-01

    Introduction The posterior thoracic wall, an area drained by the azygos venous system, is a common site for surgical intervention. Since the venous part of the cardiovascular system is subject to most common variation, abnormalities in the azygos venous system are often reported. Case presentation During routine dissection classes for undergraduate medical students, we encountered a variation in the azygos venous system in a 65 years old south Indian male cadaver. We observed that there was n...

  4. Aberrant left brachiocephalic vein: CT imaging findings and embryologic correlation

    International Nuclear Information System (INIS)

    Computed tomography was utilized to evaluate aberrant left brachiocephalic vein (ALBCV), an infrequently discussed congenital vascular anomaly among Chinese people. Associated vascular variation and possible embryonic correlation are discussed. Since 1990, a total of 14 cases of ALBCV have been reported in patients receiving CT scan of chest, and was mainly an incidental diagnosis. One case was confirmed angiographically and two others were confirmed by magnetic resonance imaging. Emphasis was placed on the entry of the azygos vein into the superior vena cava (SVC), the length of the SVC, and the presence of other cardiovascular abnormalities. Of the 14 cases of ALBCV, the level of azygos vein entry was higher than the origin of the SVC in 7 cases: 4 were approximately the same level and 3 were lower. The average length of the SVC was approximately 5.6 cm shorter than that of the general population, which is approximately 7.0 cm. Three cases had associated vascular anomaly. Most cases of ALBCV had azygos vein drainage level higher than or equal to the origin of the SVC. Right-sided aorta is one of the causes giving rise to the ALBCV during embryonic development. The CT scan remains a definitive diagnostic modality for ALBCV. (orig.)

  5. [Large distal anterior cerebral artery aneurysm associated with azygos anterior cerebral artery: case report].

    Science.gov (United States)

    Suzuki, Y; Kawamata, T; Matsumoto, H; Kunii, N; Matsumoto, K

    1998-10-01

    A 51-year-old woman presented with a distal anterior cerebral artery aneurysm (DACAA) manifesting as severe headache and monoparesis of the left lower limb. Computed tomography revealed subarachnoid hemorrhage in the interhemispheric fissure, bilateral sylvian fissures, and basal cistern, and a hematoma in the supracallosal region. Angiography showed a large aneurysm (23 x 18 mm) located on the distal end of the azygos anterior cerebral artery (azygos ACA) at the supracallosal portion. T2-weighted magnetic resonance imaging demonstrated the hematoma as a mixed intensity mass, compressing the corpus callosum downward, and the aneurysm as a flow void anterior to the hematoma. Unilateral frontoparietal parasagittal craniotomy was performed with a horse-shoe shaped incision. The aneurysm was clipped via the interhemispheric approach, and the hematoma was aspirated. Postoperative angiography showed disappearance of the aneurysm and intact azygos ACA. The patient was discharged with mild monoparesis, paresthesia of the left lower limb and diagnostic dyspraxia. DACAA almost always arises at or near the genu of the corpus callosum and is often associated with vascular anomaly. In the literature, 22 of 26 cases of large and giant DACAA were located at or near the genu, but only 3 cases, including ours, in the supracallosal area. 11 cases were associated with azygos ACA. Therefore, hemodynamic stress caused by vascular anomaly may be involved in the formation of large or giant DACAA in contrast with cases of normal DACAA. PMID:9789300

  6. (Mis)placed central venous catheter in the left superior intercostal vein

    International Nuclear Information System (INIS)

    Chest X-ray is routinely performed to check the position of the central venous catheter (CVC) inserted through the internal jugular or subclavian vein, while the further evaluation of CVC malfunction is usually performed by contrast venography. In patients with superior vena cava obstruction, the tip of the catheter is often seen in collateral mediastinal venous pathways, rather than in the superior vena cava. In such cases detailed knowledge of thoracic vessel anatomy is necessary to identify the exact location of the catheter. We report a case of 32-year-old female patient with relapsing mediastinal lymphoma and previous superior vena cava obstruction with collateral azygos-hemiazygos venous pathways. The patient had CVC inserted through the left subclavian vein and its position was detected by CT to be in the dilated left superior intercostal vein and accessory hemiazygos vein. Considering that dilated accessory hemiazygos vein can tolerate infusion, the CVC was left in place and the patient had no complaints related to CVC (mal)position. Furthermore, we present anatomical and radiological observations on the azygos-hemiazygos venous system with the special emphasis on the left superior intercostal vein. Non-contrast CT scans can be a valuable imaging tool in the detection of the CVC position, especially in patients with renal insufficiency and contrast media hypersensitivity

  7. Vein Problems Related to Varicose Veins

    Science.gov (United States)

    ... varicose veins include venous lakes, reticular veins, and hemorrhoids. Venous lakes are varicose veins that appear on ... flat blue veins often seen behind the knees. Hemorrhoids are varicose veins in and around the anus. ...

  8. Prenatal diagnosis of isolated interrupted inferior vena cava with azygos continuation to superior vena cava

    Directory of Open Access Journals (Sweden)

    Do Thi Cam Giang

    2014-01-01

    Full Text Available Absence of inferior vena cava is an uncommon congenital abnormality. It is usually associated with other structural anomalies, typically left isomerism. We report a case of interrupted inferior vena cava with azygos continuation diagnosed as an isolated finding during routine prenatal ultrasound scan, confirmed by post-natal echocardiography. Detailed ultrasound examination of the fetal anatomy failed to demonstrate other anomalies. The neonatal course of this fetus was uneventful.

  9. Relationship between encephalopathy and portal vein-vena cava shunt:Value of computed tomography during arterial portography

    Institute of Scientific and Technical Information of China (English)

    Qian Chu; Zhen Li; Su-Ming Zhang; Dao-Yu Hu; Ming Xiao

    2004-01-01

    AIM: To assess the value of computed tomography during arterial portography (CTAP) in portal vein-vena cava shunt,and analysis of the episode risk in encephalopathy.METHODS: Twenty-nine patients with portal-systemic encephalopathy due to portal hypertension were classified by West Haven method into grade Ⅰ(29 cases), gradeⅡ(16 cases), grade Ⅲ(10 cases), grade Ⅳ( 4 cases). All the patients were scanned by spiral-CT. Plane scans, artery phase and portal vein phase enhancement scans were performed, and the source images were thinly reconstructed to 1.25 mm. We reconstructed the celiac trunk, portal vein,inferior vena cava and their branches and subjected them to three-dimensional vessel analysis by volume rendering(VR) technique and multiplanar volume reconstruction(MPVR) technique. The blood vessel reconstruction technique was used to evaluate the scope and extent of portal vein-vena cava shunt, portal vein emboli and the fistula of hepatic artery- portal vein. The relationship between the episode risk of portal-systemic encephalopathy and the scope and extent of portal vein-vena cava shunt,portal vein emboli and fistula of hepatic artery- portal vein was studied.RESULTS: The three-dimensional vessel reconstruction technique of spiral-CT could display celiac trunk, portal vein,inferior vena cava and their branches at any planes and angles and the scope and extent of portal vein-vena cava shunt, portal vein emboli and the fistula of hepatic artery- portal vein. In twenty-nine patients with portal-systemic encephalopathy, grade Ⅰ accounted for 89.7% esophageal varices, 86.2% paragastric varices; grade Ⅱ accounted for68.75% cirsomphalos, 56.25% paraesophageal varices,62.5% retroperitoneal varices and 81.25% dilated azygos vein; grade Ⅲ accounted for 80% cirsomphalos, 60%paraesophageal varices, 70% retroperitoneal varices, 90%dilated azygos vein, and part of the patients in grades Ⅱand Ⅲ had portal vein emboli and fistula of hepatic arteryportal vein

  10. Endoscopic Doppler ultrasound for measurement of azygos blood flow. Validation against thermodilution and assessment of pharmacological effects of terlipressin in portal hypertension

    DEFF Research Database (Denmark)

    Hansen, Erik Feldager; Bendtsen, Flemming; Brinch, K;

    2001-01-01

    BACKGROUND: Endoscopic ultrasound (EUS) is a new modality allowing real-time flow measurements by means of the Doppler technique. The aim of the study was to evaluate azygos blood flow measurements by endoscopic ultrasound. METHODS: Measurements of azygos blood flow by EUS and by the thermodilution...... technique were compared in 20 patients with portal hypertension. The ability of EUS flowmetry to detect changes in the azygos and portal venous flow after an intravenous dose of 2 mg of terlipressin was evaluated in 13 of the patients in a double-blind, randomized, placebo-controlled, cross-over design....... RESULTS: The EUS Doppler and thermodilution measurements correlated significantly (R=0.81, P < 0.001). The azygos blood flow was found to be 14% higher by the EUS method than by thermodilution. The coefficient of variation of the EUS Doppler measurements of the azygos blood flow was 14.8%. After...

  11. Clinical implications of concomitant variations of the testicular, suprarenal and renal veins: a case report.

    Science.gov (United States)

    Malcic-Gürbüz, Jasna; Akalin, Aytül; Gümüşcü, Burak; Cavdar, Safiye

    2002-01-01

    Multiple venous anomalies have been observed during dissection of the posterior abdominal wall in a 65-year-old, white male cadaver. The left testicular and suprarenal veins united inferior to the superior mesenteric artery, coursed anterior to the abdominal aorta and drained into the inferior vena cava (IVC). Further the left renal vein coursed retroaortically and divided into three branches. The superior branch coursed on the vertebral column and drained into the azygos vein while middle and inferior branches drained into the IVC. The right renal vein was double and both drained into the IVC separately. Due to implications for numerous therapeutical and diagnostic procedures in the retroperitoneal region knowledge of these variations could be useful for clinicians in its recognition and protection. PMID:11876480

  12. Percutaneous closure of patent ductus arteriosus in interrupted inferior caval vein through femoral vein approach

    International Nuclear Information System (INIS)

    Percutaneous closure of the patent arterial duct in patients with interrupted inferior caval vein poses a technical challenge. A 12-year-old girl with a patent ductus arteriosus (PDA) and interrupted inferior caval vein is described in this report. The diagnosis of interrupted inferior caval vein and azygos continuation was made in the catheterization laboratory. A catheter was advanced and snared in the descending aorta. An exchange wire was advanced through the catheter and snared in the descending aorta. Then, an Amplatzer TorqVue 2 delivery sheath was advanced over the wire from the venous side and again snared in the descending aorta. An Amplatzer duct occluder (ADO) size 8/6 was advanced through the sheath while still holding the sheath with a snare. The device was opened. The sheath was then unsnared once the aortic disc was completely out. The sheath and the device were pulled back into the duct and the device was successfully implanted. The device was then released and it attained a stable position. An aortic angiogram was performed which showed complete occlusion

  13. [Compensative dilatation of the vena azygos by abnormalities of the vena cava inferior - a contribution to the differential diagnosis of the tumorsuspected right tracheobronchial angle (author's transl)].

    Science.gov (United States)

    Strauss, H J; Strauss, G

    1976-08-01

    Report on 2 patients, with a mediastinal enlargement at the right tracheobronchial angle revealing an ectasis of the orifice of vena-azygos. It could be shown that the enlargement of the vena azygos ist due to an increase of the flow-volume, caused by an abnormal embryonic drainage of the vena cava inferior into the vena azygos. The diagnostic possibilities for differentiation from vascular and nonvascular space-occupying processes in that region are discussed. An exact diagnosis is possible by angiography. PMID:1020364

  14. Varicose vein - noninvasive treatment

    Science.gov (United States)

    Sclerotherapy; Laser therapy - varicose veins; Radiofrequency vein ablation; Endovenous thermal ablation; Ambulatory phlebectomy; Transilluminated power phlebotomy; Endovenous laser ablation; Varicose vein ...

  15. Multimodality Imaging Diagnostic Approach of Systemic-to-Pulmonary Vein Fistulae.

    Science.gov (United States)

    El Ghannudi, Soraya; Germain, Philippe; Jeung, Mi-Young; Jahn, Christine; Hirschi, Sandrine; Roy, Catherine

    2016-03-01

    A 26-year-old man with a history of bilateral lung transplantation for pulmonary cystic fibrosis 6 months before was admitted in our institution for acute heart failure. Cardiac magnetic resonance imaging (CMR) showed an increased aortic output, as aortic flow assessed by velocity mapping was twofold the pulmonary flow, an occluded superior vena cava (SVC), and enlarged azygos vein. A systemic-to-pulmonary vein fistula (SAPVF) was suspected. The selective angiography showed numerous fistulae between intercostals, thyro-cervical, internal mammary arteries and pulmonary veins. The thoracic CT performed before the CMR, which was initially considered as normal, showed well these arteriovenous fistulae after 3D MIP reconstruction. This particular observation highlights the great value of multimodality imaging for the diagnosis of this rare pathology. The MR velocity mapping is a noninvasive imaging technique of great interest to guide the diagnosis of arteriovenous fistulae, and further indicating more invasive complementary imaging modalities like selective arterial angiography. PMID:26603830

  16. Endoscopic Doppler ultrasound for measurement of azygos blood flow. Validation against thermodilution and assessment of pharmacological effects of terlipressin in portal hypertension

    DEFF Research Database (Denmark)

    Bendtsen, Flemming; Brinch, K; Møller, Søren; Henriksen, Jens Henrik Sahl; Becker, Povl Ulrik; Hansen, Erik Feldager

    2001-01-01

    technique were compared in 20 patients with portal hypertension. The ability of EUS flowmetry to detect changes in the azygos and portal venous flow after an intravenous dose of 2 mg of terlipressin was evaluated in 13 of the patients in a double-blind, randomized, placebo-controlled, cross-over design......BACKGROUND: Endoscopic ultrasound (EUS) is a new modality allowing real-time flow measurements by means of the Doppler technique. The aim of the study was to evaluate azygos blood flow measurements by endoscopic ultrasound. METHODS: Measurements of azygos blood flow by EUS and by the thermodilution...... measurement of the azygos blood flow correlate strongly to the measurements by the thermodilution technique, and EUS is moreover well tolerated by the patients. The method is applicable for monitoring pharmacological effects on the superior porto-systemic collateral circulation and portal venous flow in...

  17. A case of bilateral superior vena cava with variations in the azygos system and in the heart.

    Science.gov (United States)

    Ortale, J R; Grill, E H

    1994-08-01

    A case of bilateral superior vena cava is described in an adult cadaver of undetermined sex and age. The persistent left superior vena cava had a larger diameter approximately equal to that of the right superior vena cava ending in a wide caliber coronary sinus. Variations in the azygos system were also found. The ventricles show thin walls with trabeculae carneae forming one to five strata in the left ventricle, and from one to three strata in the right ventricle. PMID:8085654

  18. Retinal vein occlusion

    Science.gov (United States)

    Central retinal vein occlusion; Branch retinal vein occlusion; CRVO; BRVO ... Retinal vein occlusion is most often caused by hardening of the arteries ( atherosclerosis ) and the formation of a blood clot. Blockage ...

  19. Preventing Deep Vein Thrombosis

    Science.gov (United States)

    ... Management Education & Events Advocacy For Patients About ACOG Preventing Deep Vein Thrombosis Home For Patients Search FAQs ... Deep Vein Thrombosis FAQ174, August 2011 PDF Format Preventing Deep Vein Thrombosis Women's Health What is deep ...

  20. CASE REPORT: PRESENCE OF A DILATED COMMUNICATING VE IN BETWEEN LEFT RENAL AND LEFT ASCENDING, LUMBER VEIN

    Directory of Open Access Journals (Sweden)

    Arindom

    2013-03-01

    Full Text Available ABSTRACT: Venous anomalies are commonly observed throughout t he body during routine dissections or intra-operatively, but a communicatio n between the left renal vein and the ascending lumbar vein has rarely been reported. In this case study a dilated communicating vein was observed connecting the left renal vein wi th the left ascending lumbar vein. The dilatation may be due to any obstruction in the lef t renal or inferior vena cava leading to incompetency of the venous valves and retrograde flo w of blood causing varicosity in this communicating vein. The rest of the azygos venous system was normal on both sides. Though individuals having this dilated anomalous communica tion may be asymptomatic, nonetheless awareness regarding this communicating vein is of u tmost importance for surgeons performing aorto-iliac and other retroperitoneal surgeries. It may also be confused with other pathologies like para-aortic lymphadenopathy, adrenal pseudo-mass etc. leading to difficulty in radiological diagnosis. Therefore information regarding the prese nce of this vein is of importance for radiologists and surgeons to avoid pre and post-operat ive complications.

  1. Portal Vein Thrombosis

    OpenAIRE

    Ronny Cohen; Thierry Mallet; Michael Gale; Remigiusz Soltys; Pablo Loarte

    2015-01-01

    Portal vein thrombosis (PVT) is the blockage or narrowing of the portal vein by a thrombus. It is relatively rare and has been linked with the presence of an underlying liver disease or prothrombotic disorders. We present a case of a young male who presented with vague abdominal symptoms for approximately one week. Imaging revealed the presence of multiple nonocclusive thrombi involving the right portal vein, the splenic vein, and the left renal vein, as well as complete occlusion of the left...

  2. Portal Vein Thrombosis

    Directory of Open Access Journals (Sweden)

    Hakan Demirci

    2016-01-01

    Full Text Available Portal vein thrombosis is an important cause of presinusoidal portal hypertension. Portal vein thrombosis commonly occurs in patient with cirrhosis, malignancy and prothrombotic states. Patients with acute portal vein thrombosis have immediate onset. Patients with chronic portal vein thrombosis have developed portal hypertension and cavernous portal transformation. Portal vein thrombosis is diagnosed with doppler ultrasound, computed tomography and magnetic resonance imaging. Therapy with low molecular weight heparin achieves recanalization in more than half of acute cases.

  3. [An infected partially thrombosed giant aneurysm of the azygos anterior cerebral artery].

    Science.gov (United States)

    Mishima, K; Watanabe, T; Sasaki, T; Saito, I; Takakura, K

    1990-05-01

    The authors report a case of partially thrombosed giant aneurysm which was secondarily infected with purulent meningitis. The relationship between the infection of the aneurysm, the rapid growth of the aneurysm and the development of severe cerebral edema was discussed. A 53 year-old man was admitted on September 1, 1986, with a diagnosis of bacterial meningitis. On his admission, his body temperature was 39 degrees C, and he showed mental confusion but no neurological deficits. Laboratory data revealed signs of infection in white blood cell count, CRP, and erythrocyte sedimentation rate. Computerized tomographic (CT) scan and magnetic resonance (MR) imaging showed a massive round mass with perifocal edema measuring 40mm in the maximum diameter in the left paramedian frontal region. T1 weighted MR image also showed the presence of pus accumulation in the left ventricle. Cerebral angiography demonstrated a giant aneurysm at the distal portion of the azygos anterior cerebral artery, and irregular narrowing of both the supraclinoid segment of the carotid artery and its main branches indicating arteritis due to purulent meningitis. The patient was treated with ventricular drainage and administration of antibiotics. Culture of the purulent CSF was negative. The patient's lab data, CSF finding and neurological status improved progressively. However, follow-up CT scan and angiogram a month later showed enlargement of the aneurysm, dilatation of the patent lumen and perifocal edema. On October 8, the patient suddenly became comatose with anisocoria. A CT scan showed massive edema with marked midline shift. Emergency bifrontal craniotomy was carried out, and clipping was completed after removal of the thrombosed portion of the aneurysm, and thromboendarterectomy of the aneurysmal neck.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:2385324

  4. Portal Vein Thrombosis

    Directory of Open Access Journals (Sweden)

    Ronny Cohen

    2015-01-01

    Full Text Available Portal vein thrombosis (PVT is the blockage or narrowing of the portal vein by a thrombus. It is relatively rare and has been linked with the presence of an underlying liver disease or prothrombotic disorders. We present a case of a young male who presented with vague abdominal symptoms for approximately one week. Imaging revealed the presence of multiple nonocclusive thrombi involving the right portal vein, the splenic vein, and the left renal vein, as well as complete occlusion of the left portal vein and the superior mesenteric vein. We discuss pathogenesis, clinical presentation, and management of both acute and chronic thrombosis. The presence of PVT should be considered as a clue for prothrombotic disorders, liver disease, and other local and general factors that must be carefully investigated. It is hoped that this case report will help increase awareness of the complexity associated with portal vein thrombosis among the medical community.

  5. Focus on Varicose Veins

    Science.gov (United States)

    ... linked with the presence of varicose veins in women. What are the signs and symptoms? Varicose veins may be entirely symptom-free and cause no immediate health problems. Treatment in such cases is usually considered cosmetic. When symptoms are present, the most common are ...

  6. Bilateral meandering pulmonary veins

    Energy Technology Data Exchange (ETDEWEB)

    Thupili, Chakradhar R.; Udayasankar, Unni [Pediatric Imaging, Imaging Institute Cleveland Clinic, Cleveland, OH (United States); Renapurkar, Rahul [Imaging Institute Cleveland Clinic, Thoracic Imaging, L10, Cleveland, OH (United States)

    2015-06-15

    Meandering pulmonary veins is a rare clinical entity that can be mistaken for more complex congenital syndromes such as hypogenetic lung syndrome. We report imaging findings in a rare incidentally detected case of bilateral meandering pulmonary veins. We briefly discuss the role of imaging in diagnosing this condition, with particular emphasis on contrast-enhanced CT. (orig.)

  7. Varicose vein - noninvasive treatment

    Science.gov (United States)

    ... thermal ablation; Ambulatory phlebectomy; Transilluminated power phlebotomy; Endovenous laser ablation; Varicose vein therapy ... after treatment. Your leg may be checked using ultrasound a few days after treatment to make sure ...

  8. Popliteal vein aneurysm.

    Science.gov (United States)

    Falkowski, A; Poncyljusz, W; Zawierucha, D; Kuczmik, W

    2006-06-01

    The incidence of a popliteal vein aneurysm is extremely low. Two cases of this rare venous anomaly are described. The epidemiology, morphology, and diagnostic methods are discussed and the potentially dangerous complications and treatment methods are presented. PMID:16796307

  9. Pelvic Vein Embolisation in the Management of Varicose Veins

    International Nuclear Information System (INIS)

    Pelvic vein incompetence is common in patients with atypical varicose veins, contributing to their recurrence after surgery. Therefore, refluxing pelvic veins should be identified and treated. We present our experience with pelvic vein embolisation in patients presenting with varicose veins. Patients presenting with varicose veins with a duplex-proven contribution from perivulval veins undergo transvaginal duplex sonography (TVUS) to identify refluxing pelvic veins. Those with positive scans undergo embolisation before surgical treatment of their lower limb varicose veins. A total of 218 women (mean age of 46.3 years) were treated. Parity was documented in the first 60 patients, of whom 47 (78.3%) were multiparous, 11 (18.3%) had had one previous pregnancy, and 2 (3.3%) were nulliparous. The left ovarian vein was embolised in 78%, the right internal iliac in 64.7%, the left internal iliac in 56.4%, and the right ovarian vein in 42.2% of patients. At follow-up TVUS, mild reflux only was seen in 16, marked persistent reflux in 6, and new reflux in 3 patients. These 9 women underwent successful repeat embolisation. Two patients experienced pulmonary embolisation of the coils, of whom 1 was asymptomatic and 1 was successfully retrieved; 1 patient had a misplaced coil protruding into the common femoral vein; and 1 patient had perineal thrombophlebitis. The results of our study showed that pelvic venous embolisation by way of a transjugular approach is a safe and effective technique in the treatment of pelvic vein reflux.

  10. Deep Vein Thrombosis

    Centers for Disease Control (CDC) Podcasts

    2012-04-05

    This podcast discusses the risk for deep vein thrombosis in long-distance travelers and ways to minimize that risk.  Created: 4/5/2012 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 4/5/2012.

  11. Deep Vein Thrombosis

    Science.gov (United States)

    ... symptom is leg pain and tenderness in the calf muscles. One may also observe swelling or a ... clotting. To find out more about the Vascular Disease Foundation, call 888.833.4463 or ... chronic respiratory failure, a history of smoking, varicose veins, pregnancy ...

  12. The vein collar

    DEFF Research Database (Denmark)

    Lundgren, F; Schroeder, Torben Veith

    2012-01-01

    Randomized studies evaluating the effect of a vein collar at the distal anastomosis of PTFE-grafts show conflicting results. The study of the Joint Vascular Research Group (JVRG) of UK found improved primary patency while the Scandinavian Miller Collar Study (SCAMICOS) found neither any effect on...

  13. Living with Deep Vein Thrombosis

    Science.gov (United States)

    ... Living With Deep Vein Thrombosis Explore Deep Vein Thrombosis What Is... Other Names Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments Prevention Living With Clinical Trials Links Related Topics ...

  14. Historical Overview of Varicose Vein Surgery

    NARCIS (Netherlands)

    van den Bremer, Jephta; Moll, Frans L.

    2010-01-01

    Varicose veins are as old as Hippocrates. Varicose vein treatments come and go. Surgery for varicose vein disease is one of the commonest elective general surgical procedures. The history of varicose vein surgery has been traced. We note the first descriptions of varicose veins, and we particularly

  15. Leiomyosarcoma of the renal vein

    Directory of Open Access Journals (Sweden)

    Lemos Gustavo C.

    2003-01-01

    Full Text Available Leiomyosarcoma of the renal vein is a rare tumor of complex diagnosis. We presented a case of renal vein leiomyosarcoma detected in a routine study. The primary treatment was complete surgical removal of the mass. In cases where surgical removal is not possible the prognosis is poor, with high rates of local recurrence and distant spread.

  16. Vein type uranium deposits

    International Nuclear Information System (INIS)

    Veins are tabular- or sheet-like masses of minerals occupying or following a fracture or a set of fractures in the enclosing rock. They have been formed later than the country rock and fractures, either by filling of the open spaces or by partial or complete replacement of the adjoining rock or most commonly by both of these processes combined. This volume begins with the occurrences and deposits known from old shield areas and the sedimentary belts surrounding them. They are followed by papers describing the European deposits mostly of Variscan age, and by similar deposits known from China being of Jurassic age. The volume is completed by two papers which do not fit exactly in the given scheme. A separate abstract was prepared for each of the 25 papers in this report

  17. An anomalous course of the interazygos vein.

    Science.gov (United States)

    Celik, H H; Sargon, M F; Aldur, M M; Cumhur, M

    1996-01-01

    During an anatomic dissection of the posterior mediastinum, an unusual course of the interazygos v. was noted. The hemiazygos v. ascended to the 8th thoracic vertebra, in front of the vertebral column. It left the column, ascending obliquely, and passing in front of the aorta and behind the oesophagus. This transverse segment, crossing the midline, is called the interazygos v. It may be confused with different lesions situated at this level: aneurysm, tumour or lymph node hypertrophy, during CT or MRI studies. Secondly, the surgeon must be aware of this azygos variation as a possible cause of haemorrhage during a procedure in this region. PMID:8685815

  18. Thrombosis of right ovarian vein

    International Nuclear Information System (INIS)

    Ovarian vein thrombosis is a rare postpartum complication (0.1%). It can be fatal, since it can lead to sepsis, pulmonary thromboembolisms and inferior vena cava or renal vein thrombosis. Computed tomography and magnetic resonance imaging are the techniques of choice for its diagnosis, while the value of ultrasound is limited due to its low sensitivity and specificity. We report the case of a woman who, during puerperium, developed thrombosis of right ovarian vein that presented clinical, ultrasonographic and computed tomographic features of appendicitis. We describe the radiological sings and stress the fact that this diagnosis should be suspected in puerperal women. (Author) 9 refs

  19. Palm Vein Verification Using Gabor Filter

    OpenAIRE

    Ali Mohsin Al-Juboori

    2013-01-01

    Palm vein authentication is one of the modern biometric techniques, which employs the vein pattern in the human palm to verify the person. The merits of palm vein on classical biometric (e.g. fingerprint, iris, face) are a low risk of falsification, difficulty of duplicated and stability. In this research, a new method is proposed for personal verification based on palm vein features. In the propose method, the palm vein images are firstly enhanced and then the features are extracted by using...

  20. Leiomyosarcoma of the Adrenal Vein

    Directory of Open Access Journals (Sweden)

    I-Hung Shao

    2012-10-01

    Full Text Available Leiomyosarcoma of the adrenal gland is extremely rare in the literature. We present a patient with an adrenal leiomyosarcoma originating from the adrenal vein, the pathologic findings and management. A 66-year-old man who was a hepatitis B virus carrier was found to have a huge left suprarenal mass on sonography and computed axial tomography. A huge tumor in the left suprarenal area with a markedly engorged adrenal vein was found during an adrenalectomy. The tumor thrombus extended into the renal vein, close to the inferior vena cava. The left adrenal gland with the whole tumor thrombus was removed completely. Microscopically, the adrenal gland was compressed but not invaded by the spindle cell tumor, which was composed of interlacing fascicles of neoplastic smooth muscle cells. The tumor was localized within the adrenal vein and arose from the venous wall. The patient had no local recurrence for 18 months after en bloc excision of the tumor. We suggest that en bloc excision with a clear and adequate surgical margin is the most important cure procedure for adrenal leiomyosarcoma.

  1. Preoperative ultrasound mapping of the saphenous vein

    DEFF Research Database (Denmark)

    Levi, Niels; Schroeder, T

    1997-01-01

    A prospective series of 92 patients had their greater saphenous vein assessed with duplex ultrasound scanning prior to planned infrainguinal bypass procedures. Sixteen (17%) bypass procedures thrombosed within the first week postoperatively. A naturally occurring optimal vein diameter was...

  2. Deep vein thrombosis: a clinical review

    OpenAIRE

    Kesieme, Emeka

    2011-01-01

    Emeka Kesieme1, Chinenye Kesieme2, Nze Jebbin3, Eshiobo Irekpita1, Andrew Dongo11Department of Surgery, Irrua Specialist Teaching Hospital, Irrua, Nigeria; 2Department of Paediatrics, Irrua Specialist Teaching Hospital, Irrua, Nigeria; 3Department of Surgery, University of Port Harcourt Teaching Hospital, Port-Harcourt, NigeriaBackground: Deep vein thrombosis (DVT) is the formation of blood clots (thrombi) in the deep veins. It commonly affects the deep leg veins (such as the calf veins, femo...

  3. Transcutaneous transsplenic catheterization of the splenic vein

    International Nuclear Information System (INIS)

    The authors have developed a method for transcutaneous transsplenic catheterizaton of the portal vein basin and used this method in clinical studies. This method permits a higher quality of spot splenoportography, selective catheterization and embolization of the gastric veins in bleedings from varicose veins of the esophagus in the patients in whom catheterization of the portal vien basin via the transcutaneous transhepatic approach is impossible because of liver tumors of occulusive stenotic deformation of the portal vein

  4. Mechanical Buckling of Veins under Internal Pressure

    OpenAIRE

    Martinez, Ricky; Fierro, Cesar A.; Shireman, Paula K.; Han, Hai-Chao

    2010-01-01

    Venous tortuosity is associated with multiple disease states and is often thought to be a consequence of venous hypertension and chronic venous disease. However, the underlying mechanisms of vein tortuosity are unclear. We hypothesized that increased pressure causes vein buckling that leads to a tortuous appearance. The specific aim of this study was to determine the critical buckling pressure of veins. We determined the buckling pressure of porcine jugular veins and measured the mechanical p...

  5. Vein thromboembolism prevention in stroke patients

    OpenAIRE

    Savić Dejan; Savić Ljiljana

    2010-01-01

    Introduction Having in mind the rate of occurrence and clinical importance, venous thromboembolism implies venous thrombosis and pulmonary embolism as a result of embolisation of the thrombotic particles from deep veins or pelvic veins. Venous thrombosis of the deep veins may result in chronic vein insufficiency, but the primary medical problem is the possibility of development of pulmonary embolism which may cause permanent respiratory function damage or even fatal outcome. Venous thromboemb...

  6. Mechanical buckling of veins under internal pressure.

    Science.gov (United States)

    Martinez, Ricky; Fierro, Cesar A; Shireman, Paula K; Han, Hai-Chao

    2010-04-01

    Venous tortuosity is associated with multiple disease states and is often thought to be a consequence of venous hypertension and chronic venous disease. However, the underlying mechanisms of vein tortuosity are unclear. We hypothesized that increased pressure causes vein buckling that leads to a tortuous appearance. The specific aim of this study was to determine the critical buckling pressure of veins. We determined the buckling pressure of porcine jugular veins and measured the mechanical properties of these veins. Our results showed that the veins buckle when the transmural pressure exceeds a critical pressure that is strongly related to the axial stretch ratio in the veins. The critical pressures of the eight veins tested were 14.2 +/- 5.4 and 26.4 +/- 9.0 mmHg at axial stretch ratio 1.5 and 1.7, respectively. In conclusion, veins buckle into a tortuous shape at high lumen pressures or reduced axial stretch ratios. Our results are useful in understanding the development of venous tortuosity associated with varicose veins, venous valvular insufficiency, diabetic retinopathy, and vein grafts. PMID:20094913

  7. FINGER-VEIN RECOGNITION SYSTEMS

    Directory of Open Access Journals (Sweden)

    A.Haritha Deepthi

    2015-10-01

    Full Text Available As the Person‟s/Organization‟s Private information‟s are becoming very easy to access, the demand for a Simple, Convenient, Efficient, and a highly Securable Authentication System has been increased. In considering these requirements for data Protection, Biometrics, which uses human physiological or behavioral system for personal Identification has been found as a solution for these difficulties. However most of the biometric systems have high complexity in both time and space. So we are going to use a Real time Finger-Vein recognition System for authentication purposes. In this paper we had implemented the Finger Vein Recognition concept using MATLAB R2013a. The features used are Lacunarity Distance, Blanket Dimension distance. This has more accuracy when compared to conventional methods.

  8. Leiomyosarcoma of the renal vein.

    Science.gov (United States)

    Imao, Tetsuya; Amano, Toshiyasu; Takemae, Katsurou

    2011-02-01

    A 43-year-old woman was referred to our clinic for evaluation of a left retroperitoneal mass. She presented to our internal medicine department complaining of back pain. Computed tomography (CT) scan revealed a left retroperitoneal mass 55 mm in size in the hilum of the left kidney. Enhanced CT scan and magnetic resonance imaging (MRI) disclosed a poorly staining mass. Metaiodobenzylguanidine scintigraphy demonstrated no accumulation in the mass; moreover, endocrinologic examination was normal. Laparoscopic resection of the left retroperitoneal tumor was attempted; however, strong adhesion between the tumor and the left renal vein was encountered. Thus, left nephrectomy after open conversion was performed. Histological findings indicated leiomyosarcoma originating from the left renal vein. The postoperative course has been uneventful; neither recurrence nor metastasis is evident 2 years postsurgery. PMID:20694494

  9. Vein harvesting and techniques for infrainguinal bypass.

    Science.gov (United States)

    Albäck, Anders; Saarinen, Eva; Venermo, Maarit

    2016-04-01

    In order to achieve good long term results after bypass surgery, alongside with good inflow and outflow arteries, the bypass graft material also has an important role. The best patency and limb salvage rates are achieved with autologous vein. If great saphenous vein is not available, acceptable long-term results can be achieved with arm veins and lesser saphenous vein. The quality and size of the vein are important. A small-caliber vein, increased wall thickness, postphlebitic changes and varicosities are associated with a risk of early failure. Preoperative vein mapping with ultrasound reduces readmissions and postoperative surgical site infections. During the mapping, the vein to be used and its main tributaries are marked with a permanent marker pen. To reduce wound complication rates we recommend bridged incisions in vein harvesting. Endoscopic vein harvesting seems to have no benefit compared to open techniques in lower limb bypasses, and has been associated with higher risk of primary patency loss at one year. With deep tunneling of the graft the problems caused by wound infection can be avoided. PMID:26837257

  10. Abnormal formation and communication of external jugular vein

    OpenAIRE

    Nayak SB; KV S

    2008-01-01

    Knowledge of variations in the origin, course and termination of external jugular vein may be important for surgeons, radiologists, and plastic surgeons. In this report, we present a variation in the origin of the external jugular vein and its abnormal communication with the cephalic vein. The external jugular vein was formed by the union of facial and retromandibular veins. Its course and termination were normal but it communicated with the cephalic vein through a large communicating vein, w...

  11. Preduodenal portal vein: its surgical significance.

    Science.gov (United States)

    Makey, D A; Bowen, J C

    1978-11-01

    Preduodenal portal vein is a rare anatomical variant which may be one of many anomalies in the neonate with duodenal "atresia." Preduodenal portal vein also may be an occasional finding in an adult undergoing biliary, gastric, or pancreatic surgery. Awareness and recognition of the anomaly are essential for the avoidance of injury during such operations. We report here a symptomless patient whose preduodenal portal vein was discovered at cholecystectomy. PMID:715684

  12. Failure of Femoral Access to Electrophysiological Evaluation Due to Aplasia of the Inferior Vena Cava

    Science.gov (United States)

    Parahuleva, Mariana S.; Burgazli, Mehmet; Soydan, Nedim; Franzen, Wolfgang; Güttler, Norbert; Erdogan, Ali

    2016-01-01

    We report an interesting case of a man with a persistent left superior vena cava (PLSVC) with left azygos vein who underwent electrophysiological evaluation. Further evaluation revealed congenital dilated azygos vein, while a segment connecting the inferior vena cava (IVC) to the hepatic vein and right atrium was missing. The azygos vein drained into the superior vena cava, and the hepatic veins drained directly into the right atrium. The patient did not have congenital anomalies of the remaining thoracoabdominal vasculature. PMID:27257399

  13. Endovenous laser therapy for varicose vein

    Directory of Open Access Journals (Sweden)

    Erwin Mulia

    2013-05-01

    Full Text Available Laser has become a useful technology in treating venous incompetence especially superficial venous disease. Introduction of endovenous thermal ablation through endovenous laser therapy helped by duplex ultrasound guidance has provided an alternative for traditional saphenous vein stripping. High success rate, minor complications, and minimally invasive technique provide the advantages over traditional treatment. In this case illustrated, the endovenous laser therapy used for great saphenous varicose vein. Yet, future development in endovenous laser therapy is still needed and only long term follow-up and uniform reporting standards will provide the answers. (Med J Indones. 2013;22:117-20Keywords: Endovenous laser theraphy, great saphenous vein, varicose vein

  14. Endovenous laser therapy for varicose veins

    NARCIS (Netherlands)

    Disselhoff, B.C.V.M.

    2008-01-01

    This thesis describes the technique of endovenous laser ablation and the outcome of various series of patients with varicose veins due to reflux in the great saphenous vein, treated by endovenous laser ablation or cryostripping in a single-centre study. This study has shown clear advantages of endov

  15. Retinal vein occlusion: pathophysiology and treatment options

    OpenAIRE

    Karia, Niral

    2010-01-01

    Niral KariaDepartment of Ophthalmology, Southend Hospital, Prittlewell Chase, Westcliff on Sea, Essex, United KingdomAbstract: This paper reviews the current thinking about retinal vein occlusion. It gives an overview of its pathophysiology and discusses the evidence behind the various established and emerging treatment paradigms.Keywords: central, hemispheric, branch, retinal vein occlusion, visual loss

  16. Retinal vein occlusion: pathophysiology and treatment options

    Directory of Open Access Journals (Sweden)

    Niral Karia

    2010-07-01

    Full Text Available Niral KariaDepartment of Ophthalmology, Southend Hospital, Prittlewell Chase, Westcliff on Sea, Essex, United KingdomAbstract: This paper reviews the current thinking about retinal vein occlusion. It gives an overview of its pathophysiology and discusses the evidence behind the various established and emerging treatment paradigms.Keywords: central, hemispheric, branch, retinal vein occlusion, visual loss

  17. Ultrasound-guided subclavian vein catheterization

    International Nuclear Information System (INIS)

    To assess the usefulness of the ultrasound-guided subclavian vein catheterization in difficult patients. We tried subclavian vein catheterization in 18 patients in which conventional blind technique failed(N=9): or was complicated by hemothorax or pneumothorax(N=3): or was prohibited by respirator care(N=4) and severe thoracic deformity(N=2). Initially, the patency of subclavian vein was evaluated with ultrasonography, and then, the puncture of the subclavian vein was performed under the guidance of ultrasonography. Under the fluoroscopy, the patency of the proximal subclavian vein and the superior vena cava was evaluated after contrast-media injection and a catheter was inserted into the subclavian vein and accurately positioned at the superior vena cava. Successful catheterization was performed in 17 patients. In the remaining one patient, we did not perform catheterization because of bilateral subclavian vein thrombosis detected during the procedure. There were no procedure-related complications. Ultrasound-guided subclavian vein catheterization is an easy and safe method even in difficult cases

  18. Preoperative mapping of the saphenous vein

    DEFF Research Database (Denmark)

    Levi-Mazloum, Niels Donald; Sillesen, H; Nielsen, Tina G;

    1996-01-01

    A series of 124 patients had their greater saphenous vein assessed with duplex ultrasound scanning prior to planned infrainguinal bypass procedures. 33 (27%) bypass procedures thrombosed within the first year. A naturally occurring optimal vein diameter was discovered: 5.0-6.5 mm at mid-thigh lev...

  19. Element transport in veins during serpentinization

    Science.gov (United States)

    Schwarzenbach, E. M.; Beard, J. S.; Caddick, M. J.

    2013-12-01

    Serpentinization of ultramafic rocks has wide ranging implications for the petrology, rheology, and petrophysical properties of the oceanic lithosphere. During hydration of the peridotite, fluid-rock ratios and temperature control mineral formation in the veins. We studied a partly serpentinized peridotite from the Santa Elena ophiolite complex in Costa Rica and tracked element mobility during water-rock interaction. Serpentinization of the studied harzburgite is around 30 to 40%, with serpentinization of olivine being more advanced than serpentinization of orthopyroxene. Element mapping and point analyses show that the veins preserve characteristic element distributions within orthopyroxene and olivine, and with distance to orthopyroxene-hosted serpentine veins. With increasing distance from the orthopyroxene the following vein assemblages were observed in olivine: pure serpentine veins, serpentine + brucite veins, serpentine + brucite + magnetite veins. Veins are enriched in SiO2 in the proximity of orthopyroxene suggesting that a net transfer of SiO2 takes place from serpentinizing orthopyroxene to olivine. The magnetite-bearing serpentine veins mostly consist of Mg-rich serpentine (Mg# = 90 - 95) and Fe-rich brucite (Mg# = 70 - 75) finely intergrown. In contrast, the center of these veins contains a thin zone of high-Mg serpentine (Mg# 97), and high-Mg brucite (Mg# 92 - 94) next to magnetite. We infer from thermodynamic calculations that these mineral assemblages are controlled by H2O activity and low SiO2 activities. Within orthopyroxene, serpentine (Mg# = 84 - 89) with an elevated Al2O3 content ( 100 μm and > 200 μm, respectively, from the orthopyroxene. We infer that brucite is not stable in close proximity to orthopyroxene due to elevated SiO2 derived from orthopyroxene breakdown. Orthopyroxene serpentinization results in net transfer of Al2O3 into serpentine, but only in the immediate vicinity of the orthopyroxene. Overall, our study indicates that the

  20. Retinal vein occlusion: current treatment.

    Science.gov (United States)

    Lattanzio, Rosangela; Torres Gimeno, Ana; Battaglia Parodi, Maurizio; Bandello, Francesco

    2011-01-01

    Retinal vein occlusion (RVO) is a pathology noted for more than 150 years. Although a lot has been written on the matter, it is still a frequent condition with multifactorial etiopathogenesis with many unclear aspects. The RVO pathogenesis has varied systemic and local implications that make it difficult to elaborate treatment guidelines. The management of the patient with RVO is very complex and a multidisciplinary approach is required in order to identify and correct the associated risk factors. Laser therapy remains the gold standard in RVO, but only modest functional improvement has been shown in branch retinal occlusion forms. Multicenter studies of intravitreal drugs present them as an option to combine with laser. Anti-vascular endothelial growth factor, corticosteroids and sustained-release implants are the future weapons to stop disease progression and get a better visual outcome. Consequently, it is useful to clarify some aspects of the pathology that allow a better patient management. PMID:20938213

  1. Guide wire migration during femoral vein catheterization.

    Science.gov (United States)

    Khatami, Mohammad Reza; Abbasi, Rozita; Sadigh, Gelareh

    2010-10-01

    Central vein catheterization is a routine and relatively safe procedure in critically ill patients. Complications with this procedure depend to the site of catheterization and the skill of the operator. In addition to the common complications with femoral vein catheterization there are some rare usually preventable side effects related to guide wire and catheter. In our patient who underwent femoral catheterization for acute hemodialysis, we report migration of guide wire through the systemic circulation from the femoral vein to the jugular vein. This is a very rare complication that is a human error and is totally preventable by doing the procedure by a skilled doctor and considering the standards described for central vein catheter insertion. PMID:20852377

  2. Ultrasound assessment of great saphenous vein insufficiency

    Directory of Open Access Journals (Sweden)

    Chander RK

    2015-06-01

    Full Text Available Rajiv K Chander,1 Thomas S Monahan1,2 1Section of Vascular Surgery, Department of Surgery, University of Maryland School of Medicine, 2Department of Surgery, Baltimore Veterans Affairs Medical Center, Baltimore, MD, USA Abstract: Duplex ultrasonography is the ideal modality to assess great saphenous vein insufficiency. Duplex ultrasonography incorporates both gray scale images to delineate anatomy and color-Doppler imaging that visualizes the flow of blood in a structure. Assessment of great saphenous vein requires definition of the anatomy, augmentation of flow, evaluation for both superficial and deep vein thrombosis, and determining the presence of reflux. Currently, evolution in the treatment of reflux also relies on ultrasound for the treatment of the disease. Understanding the utilization of the ultrasound for the diagnosis and treatment of greater saphenous vein reflux is important for practitioners treating reflux disease. Keywords: duplex ultrasonography, small saphenous vein 

  3. Hand vein recognition based on orientation of LBP

    Science.gov (United States)

    Bu, Wei; Wu, Xiangqian; Gao, Enying

    2012-06-01

    Vein recognition is becoming an effective method for personal recognition. Vein patterns lie under the skin surface of human body, and hence provide higher reliability than other biometric traits and hard to be damaged or faked. This paper proposes a novel vein feature representation method call orientation of local binary pattern (OLBP) which is an extension of local binary pattern (LBP). OLBP can represent the orientation information of the vein pixel which is an important characteristic of vein patterns. Moreover, the OLBP can also indicate on which side of the vein centerline the pixel locates. The OLBP feature maps are encoded by 4-bit binary values and an orientation distance is developed for efficient feature matching. Based on OLBP feature representation, we construct a hand vein recognition system employing multiple hand vein patterns include palm vein, dorsal vein, and three finger veins (index, middle, and ring finger). The experimental results on a large database demonstrate the effectiveness of the proposed approach.

  4. Huge Trombus including Left Renal Vein, Ovarian Vein, and Inferior Vena Cava Mimicking Renal Colic

    OpenAIRE

    Sakir Ongun; Sermin Coban; Abdullah Katgi; Funda Obuz; Aykut Kefi

    2014-01-01

    A 31-year-old female presented with acute left flank pain; she had a C/S at the postpartum day 24. Ureteral stone was suspected but ultrasound examination was normal. Then Doppler ultrasound revealed a trombus in left renal vein and inferior vena cava. Contrast enhanced MDCT scan showed swelled and nonfunctional left kidney, a trombus including distal part of left ovarian vein, left renal vein, and inferior vena cava. We started anticoagulation treatment. Further examination revealed diagnosi...

  5. Deep Vein Thrombosis (DVT) (Beyond the Basics)

    Science.gov (United States)

    ... Contrast venography — During contrast venography, a catheter is threaded into a vein and a dye is injected. ... including all US export laws and regulations, in connection with the Licensed Materials. 5. SUBSCRIPTION TERM: You ...

  6. Axillary vein thrombosis mimicking muscular strain.

    OpenAIRE

    Louis, J.

    1999-01-01

    Axillary vein thrombosis may occur on strenuous activity with a clinical picture similar to a simple strain. It carries significant morbidity but a good outcome is possible with early treatment. The aetiology, investigation, and treatment are discussed.

  7. Aneurysm of the vein of Galen

    International Nuclear Information System (INIS)

    We report a case of a vein of Galen aneurysm in a neonate in which MR imaging provided essentially all pertinent diagnostic information prior to surgery. MR findings correlated well with selective cerebral angiography. (orig./MG)

  8. Branch Retinal Vein Occlusion and Its Management

    Institute of Scientific and Technical Information of China (English)

    Desmond; Archer

    1992-01-01

    The natural course of Branch Retinal Vein Occlusion is determined by the site and completeness of the occlusion, the integrity of arterial perfusion to the affected sector and the efficiency of the developing collateral circulation. Most patients with tributary vein occlusion have some capillary fall out and microvascular incompetence in the distribution of the affected retina and vision is significantly compromised in over 50% of patients who have either chronic macular oedema or ischemia involving the...

  9. Primary leiomyosarcoma of the innominate vein.

    Science.gov (United States)

    Illuminati, Giulio; Miraldi, Fabio; Mazzesi, Giuseppe; D'urso, Antonio; Ceccanei, Gianluca; Bezzi, Marcello

    2007-01-01

    Primary venous leiomyosarcoma is rare. We report the case of a primary leiomyosarcoma of the left innominate vein, with neoplastic thrombus extending into the left jugular and subclavian veins. The tumor was curatively resected en bloc with anterior mediastinal and laterocervical lymphatics, through a median sternotomy prolonged into left cervicotomy. Primary venous sarcomas may be associated with prolonged survival in individual cases, with curative resection recommended as the standard treatment, in the absence of distant spread. PMID:17349340

  10. Conduits for Coronary Bypass: Vein Grafts

    OpenAIRE

    Barner, Hendrick B.; Farkas, Emily A.

    2012-01-01

    The saphenous vein has been the principal conduit for coronary bypass grafting from the beginning, circa 1970. This report briefly traces this history and concomitantly presents one surgeons experience and personal views on use of the vein graft. As such it is not exhaustive but meant to be practical with a modest number of references. The focus is that of providing guidance and perspective which may be at variance with that of others and recognizing that there may be many ways to accomplish ...

  11. Behavioural recovery after treatment for varicose veins

    OpenAIRE

    Cotton, S. C.; MacLennan, G.; Brittenden, J.; Prior, M. E.; Francis, J.

    2016-01-01

    BACKGROUND: The aim of this study was to assess behavioural recovery from the patient's perspective as a prespecified secondary outcome in a multicentre parallel-group randomized clinical trial comparing ultrasound-guided foam sclerotherapy (UGFS), endovenous laser ablation (EVLA) and surgery for the treatment of primary varicose veins. METHODS: Participants were recruited from 11 UK sites as part of the CLASS trial, a randomized trial of UGFS, EVLA or surgery for varicose veins. Patient...

  12. Renal vein thrombosis in transitional cell carcinoma

    International Nuclear Information System (INIS)

    Full text: A rare case of renal transitional cell carcinoma (TCC) associated with bland thrombus of the renal vein extending into the inferior vena cava is described. Tumour thrombus in renal cell carcinoma is frequently encountered, but only very rarely occurs with TCC. Bland renal vein thrombosis occurring with renal TCC has not been described before. Contrast enhanced computed tomography assisted in distinguishing between bland and tumour thrombosis and aided in surgical management

  13. Portal Vein Aneurysm Presenting with Obstructive Jaundice

    OpenAIRE

    Chandana Lall; Sadhna Verma; Rajesh Gulati; Puneet Bhargava

    2012-01-01

    To the best of our knowledge, a portal vein aneurysm presenting with obstructive jaundice has not been reported in the literature. The preferred treatment for these aneurysms is surgical and a shunting procedure should be considered in cases with portal hypertension to preserve portal vein flow when portal hypertension is present or is secondary to the aneurysm itself. In our case, due to patient′s advanced age and co-morbidities, an endoscopic biliary stent was placed which led to successful...

  14. Research progress in non-permanent vein cava filters

    International Nuclear Information System (INIS)

    Vein cava filter placement has already become one of the most effective measures for preventing pulmonary embolism which is usually secondary to deep vein thrombosis. With the development of research, non-permanent vein cava filter has been widely used. This paper aims to describe the recent progress in the research of non-permanent vein cava filters. (authors)

  15. Subclavian vein thrombosis: A continuing challenge

    International Nuclear Information System (INIS)

    Subclavian vein thrombosis is a relatively uncommon but potentially morbid disease entity. To determine the frequency, cause, and best mode of treatment of this problem, we performed a chart review of all patients with a diagnosis of subclavian vein thrombosis at two major metropolitan hospitals during a 6-year period. A total of 40 patients were identified with subclavian vein thrombosis, which represented 3.5% of all venous thromboses detected during the 6-year period. No side or sex predilection was noted and the majority of patients were outpatients. The cause was fairly evenly divided among intravenous catheters (32%), anatomic abnormalities (45%), and carcinoma with postoperative radiation (22.5%). Despite the increasing use of the subclavian veins for pacemaker leads, hyperalimentation, and permanent intravenous access for chemotherapy, there has not been an increase in diagnosed subclavian vein thrombosis. Anatomic abnormalities with compression of the vein respond well to either heparinization or lytic therapy but require surgery if the venous abnormality persists. Treatment consisted of lytic therapy in 20%, heparinization in 55%, and elevation with removal of the central line in 25% of patients. All patients responded well to treatment, with a decrease in swelling and symptoms; no patient progressed to venous gangrene and only one (2.5%) had a documented pulmonary embolus. Medical treatment provides excellent long-term benefit in most cases unless complicated by an anatomic abnormality

  16. Transvenous liver biopsy via the femoral vein

    International Nuclear Information System (INIS)

    AIM: To study the safety, effectiveness and diagnostic value of transvenous forceps biopsy of the liver in 54 patients with coagulopathy, gross ascites or morbid obesity and suspected liver disease in whom percutaneous liver biopsy was contraindicated. MATERIAL AND METHODS: Forceps biopsy of the liver via the femoral vein was attempted in 54 adult patients with advanced liver disease of unknown aetiology who had coagulation disorders (41 cases), gross ascites (11 cases) or morbid obesity (two cases). In each patient two to six biopsies (average four) were taken using a radial jaw forceps inserted via the right or left femoral vein. RESULTS: The procedure was successful in 53 cases. Hepatic vein catheterization failed in one patient. Adequate liver tissue for diagnosis was obtained in 84% of cases. One patient developed delayed haemorrhage at 12 h from a capsular leak that was undetected during the biopsy procedure. This patient required blood transfusions and laparotomy to control bleeding. There were no deaths in the 53 patients studied. Transient minor chest and shoulder pain was encountered during sheath insertion into a hepatic vein in 23 patients. Three patients developed a femoral vein haematoma, which resolved with conservative treatment. CONCLUSION: Transvenous liver biopsy via the femoral vein is another safe, effective, simple alternative technique of biopsy when the percutaneous route is contraindicated

  17. Transvenous liver biopsy via the femoral vein

    Energy Technology Data Exchange (ETDEWEB)

    Khosa, F. E-mail: fkhosa@hotmail.com; McNulty, J.G.; Hickey, N.; O' Brien, P.; Tobin, A.; Noonan, N.; Ryan, B.; Keeling, P.W.N.; Kelleher, D.P.; McDonald, G.S.A

    2003-06-01

    AIM: To study the safety, effectiveness and diagnostic value of transvenous forceps biopsy of the liver in 54 patients with coagulopathy, gross ascites or morbid obesity and suspected liver disease in whom percutaneous liver biopsy was contraindicated. MATERIAL AND METHODS: Forceps biopsy of the liver via the femoral vein was attempted in 54 adult patients with advanced liver disease of unknown aetiology who had coagulation disorders (41 cases), gross ascites (11 cases) or morbid obesity (two cases). In each patient two to six biopsies (average four) were taken using a radial jaw forceps inserted via the right or left femoral vein. RESULTS: The procedure was successful in 53 cases. Hepatic vein catheterization failed in one patient. Adequate liver tissue for diagnosis was obtained in 84% of cases. One patient developed delayed haemorrhage at 12 h from a capsular leak that was undetected during the biopsy procedure. This patient required blood transfusions and laparotomy to control bleeding. There were no deaths in the 53 patients studied. Transient minor chest and shoulder pain was encountered during sheath insertion into a hepatic vein in 23 patients. Three patients developed a femoral vein haematoma, which resolved with conservative treatment. CONCLUSION: Transvenous liver biopsy via the femoral vein is another safe, effective, simple alternative technique of biopsy when the percutaneous route is contraindicated.

  18. Veins improve fracture toughness of insect wings.

    Directory of Open Access Journals (Sweden)

    Jan-Henning Dirks

    Full Text Available During the lifetime of a flying insect, its wings are subjected to mechanical forces and deformations for millions of cycles. Defects in the micrometre thin membranes or veins may reduce the insect's flight performance. How do insects prevent crack related material failure in their wings and what role does the characteristic vein pattern play? Fracture toughness is a parameter, which characterises a material's resistance to crack propagation. Our results show that, compared to other body parts, the hind wing membrane of the migratory locust S. gregaria itself is not exceptionally tough (1.04±0.25 MPa√m. However, the cross veins increase the wing's toughness by 50% by acting as barriers to crack propagation. Using fracture mechanics, we show that the morphological spacing of most wing veins matches the critical crack length of the material (1132 µm. This finding directly demonstrates how the biomechanical properties and the morphology of locust wings are functionally correlated in locusts, providing a mechanically 'optimal' solution with high toughness and low weight. The vein pattern found in insect wings thus might inspire the design of more durable and lightweight artificial 'venous' wings for micro-air-vehicles. Using the vein spacing as indicator, our approach might also provide a basis to estimate the wing properties of endangered or extinct insect species.

  19. Pulmonary Vein Stenosis in a Newborn: A Commonly Overlooked Diagnosis

    OpenAIRE

    Nathalie Jeanne Magioli Bravo-valenzuela; Guilherme Ricardo Nunes Silva; Marcela Pinto Varella

    2015-01-01

    The diagnosis of primary pulmonary vein stenosis is often overlooked because its symptoms overlap lung diseases and pulmonary arterial hypertension. Its diagnosis may be difficult because the condition is progressive and associated with other defects. We present a case of pulmonary vein stenosis in a newborn with stenosis of the left-sided common pulmonary vein, diffuse hypoplasia of the superior right pulmonary vein, and atresia of the inferior right pulmonary vein.

  20. Corrosion cast study of the canine hepatic veins.

    Science.gov (United States)

    Uršič, M; Vrecl, M; Fazarinc, G

    2014-11-01

    This study presents a detailed description of the distribution, diameters and drainage patterns of hepatic veins on the basis of the corrosion cast analysis in 18 dogs. We classified the hepatic veins in three main groups: the right hepatic veins of the caudate process and right lateral liver lobe, the middle hepatic veins of the right medial and quadrate lobes and the left hepatic veins of both left liver lobes and the papillary process. The corrosion cast study showed that the number of the veins in the Nomina Anatomica Veterinaria and most anatomical textbooks is underestimated. The number of various-sized hepatic veins of the right liver division ranged from 3 to 5 and included 1 to 4 veins from the caudate process and 2 to 4 veins from the right lateral liver lobe. Generally, in all corrosion casts, one middle-sized vein from the right part of the right medial lobe, which emptied separately in the caudal vena cava, was established. The other vein was a large-sized vein from the remainder of the central division, which frequently joined the common left hepatic vein from the left liver lobes. The common left hepatic vein was the largest of all the aforementioned hepatic veins. PMID:25448906

  1. A New Multimodal Biometric System Based on Finger Vein and Hand Vein Recognition

    Directory of Open Access Journals (Sweden)

    Randa Boukhris Trabelsi

    2013-08-01

    Full Text Available As a reliable and robust biological characteristic, the vein pattern increases more and more the progress in biometric researches. Generally, it was shown that single biometric modality recognition is not able to meet high performances. In this paper, we propose a new multimodal biometric system based on fusion of both hand vein and finger vein modalities. For finger vein recognition, we employ the Monogenic Local Binary Pattern (MLBP, and for hand vein recognitionan Improved Gaussian Matched Filter (IGMF. Experimental results confirm that the proposed multimodal biometric process achieves excellent recognition performance compared to unimodal biometric system. The Area Under Curve (AUC of the proposed approach is very close to unity (0.98.

  2. Veining Failure and Hydraulic Fracturing in Shales

    Science.gov (United States)

    Mighani, S.; Sondergeld, C. H.; Rai, C. S.

    2014-12-01

    During the hydraulic fracturing, the pressurized fluid creates new fractures and reactivates existing natural fractures forming a highly conductive Stimulated Reservoir Volume (SRV) around the borehole. We extend the previous work on Lyons sandstone and pyrophyllite to anisotropic shale from the Wolfcamp formation. We divide the rock anisotropy into two groups: a) conventional and b) unconventional (shaly) anisotropy. X-ray Computed Tomography (CT), compressional velocity anisotropy, and SEM analysis are used to identify three causes of anisotropy: bedding planes, clay lamination, and calcite veins. Calcite vein is a subsequently filled with calcite bonded weakly to the matrix. Velocity anisotropy and visual observations demonstrate the calcite filled veins to be mostly subparallel to the fabric direction. Brazilian tests are carried out to observe the fracture initiation and propagation under tension. High speed photography (frame rate 300,000 frame/sec) was used to capture the failure. Strain gauges and Acoustic Emission (AE) sensors recorded the deformation leading up to and during failure. SEM imaging and surface profilometry were employed to study the post-failure fracture system and failed surface topology. Fracture permeability was measured as a function of effective stress. Brazilian tests on small disks containing a centered single vein revealed the shear strength of the veins. We interpret the strain data and number, frequency, and amplitude of AE events which are correlated well with the observed fracture process zone, surface roughness, and permeability. The unpropped fracture has enhanced permeability by two orders of magnitude. The observed anisotropic tensile failure seems to have a universal trend with a minimum strength occurring at 15o orientation with respect to the loading axis. The veins at 15o orientation with respect to the loading axis were easily activated at 30% of the original failure load. The measured strength of the vein is as low as 6

  3. Animal Model of Acute Deep Vein Thrombosis

    International Nuclear Information System (INIS)

    Purpose: To develop an animal model of acute deep vein thrombosis (DVT). Methods: In part I of the study nine juvenile domestic pigs were used. Each external iliac vein was transluminally occluded with a balloon catheter. Thrombin was infused through a microcatheter in one leg according to one of the following protocols: (1) intraarterial (IA): 1250 U at 25 U/min in the common femoral artery (n= 3); (2) intravenous (IV): 5000 U in the popliteal vein at 500 U/min (n= 3), or at 100 U/min (n= 3). Saline was administered in the opposite leg. After the animals were killed, the mass of thrombus in the iliofemoral veins was measured. The pudendoepiploic (PEV), profunda femoris (PF), and popliteal veins (PV) were examined. Thrombosis in the tributaries of the superficial femoral vein (SFVt) was graded according to a three-point scale (0, +, ++). In part II of the study IV administration was further investigated in nine pigs using the following three regimens with 1000 U at 25 U/min serving as the control: (1) 1000 U at 100 U/min, (2) 250 U at 25 U/min, (3) 250 U at 6.25 U/min. Results: All animals survived. In part I median thrombus mass in the test limbs was 1.40 g as compared with 0.25 g in the controls (p= 0.01). PEV, PFV and PV were thrombosed in all limbs infused with thrombin. IV infusion was more effective in inducing thrombosis in both the parent veins (mass 1.32-1.78 g) and SVFt (++ in 4 of 6 legs), as compared with IA infusion (mass 0.0-1.16 g; SFVt ++ in 1 of 3 legs). In part II thrombus mass in axial veins ranged from 1.23 to 2.86 g, and showed no relationship with the dose of thrombin or the rate of infusion. Tributary thrombosis was less extensive with 250 U at 25 U/min than with the other regimens. Conclusion: Slow distal intravenous thrombin infusion in the hind legs of pigs combined with proximal venous occlusion induces thrombosis in the leg veins that closely resembles clinical DVT in distribution

  4. The anatomy of the cardiac veins in mice

    Science.gov (United States)

    Ciszek, Bogdan; Skubiszewska, Daria; Ratajska, Anna

    2007-01-01

    Although the cardiac coronary system in mice has been the studied in detail by many research laboratories, knowledge of the cardiac veins remains poor. This is because of the difficulty in marking the venous system with a technique that would allow visualization of these large vessels with thin walls. Here we present the visualization of the coronary venous system by perfusion of latex dye through the right caudal vein. Latex injected intravenously does not penetrate into the capillary system. Murine cardiac veins consist of several principal branches (with large diameters), the distal parts of which are located in the subepicardium. We have described the major branches of the left atrial veins, the vein of the left ventricle, the caudal veins, the vein of the right ventricle and the conal veins forming the conal venous circle or the prepulmonary conal venous arch running around the conus of the right ventricle. The venous system of the heart drains the blood to the coronary sinus (the left cranial caval vein) to the right atrium or to the right cranial caval vein. Systemic veins such as the left cranial caval, the right cranial caval and the caudal vein open to the right atrium. Knowledge of cardiac vein location may help to elucidate abnormal vein patterns in certain genetic malformations. PMID:17553104

  5. Deep vein thrombosis: a clinical review

    Directory of Open Access Journals (Sweden)

    Kesieme EB

    2011-04-01

    Full Text Available Emeka Kesieme1, Chinenye Kesieme2, Nze Jebbin3, Eshiobo Irekpita1, Andrew Dongo11Department of Surgery, Irrua Specialist Teaching Hospital, Irrua, Nigeria; 2Department of Paediatrics, Irrua Specialist Teaching Hospital, Irrua, Nigeria; 3Department of Surgery, University of Port Harcourt Teaching Hospital, Port-Harcourt, NigeriaBackground: Deep vein thrombosis (DVT is the formation of blood clots (thrombi in the deep veins. It commonly affects the deep leg veins (such as the calf veins, femoral vein, or popliteal vein or the deep veins of the pelvis. It is a potentially dangerous condition that can lead to preventable morbidity and mortality.Aim: To present an update on the causes and management of DVT.Methods: A review of publications obtained from Medline search, medical libraries, and Google.Results: DVT affects 0.1% of persons per year. It is predominantly a disease of the elderly and has a slight male preponderance. The approach to making a diagnosis currently involves an algorithm combining pretest probability, D-dimer testing, and compression ultrasonography. This will guide further investigations if necessary. Prophylaxis is both mechanical and pharmacological. The goals of treatment are to prevent extension of thrombi, pulmonary embolism, recurrence of thrombi, and the development of complications such as pulmonary hypertension and post-thrombotic syndrome.Conclusion: DVT is a potentially dangerous condition with a myriad of risk factors. Prophylaxis is very important and can be mechanical and pharmacological. The mainstay of treatment is anticoagulant therapy. Low-molecular-weight heparin, unfractionated heparin, and vitamin K antagonists have been the treatment of choice. Currently anticoagulants specifically targeting components of the common pathway have been recommended for prophylaxis. These include fondaparinux, a selective indirect factor Xa inhibitor and the new oral selective direct thrombin inhibitors (dabigatran and selective

  6. Duplicated Ižnternal Juguler Vein

    Directory of Open Access Journals (Sweden)

    Ahmet Kirbas

    2014-03-01

    Full Text Available    Duplicated internal juguler vein (DIJV is a rare anomaly and reported incidence is 0.4 % in the literature. A 45-year-old female patient was referred to our hospital because of non pulsatile neck swelling. The magnetic resonance image (MRI showed left IJVs divided at the angles of the mandible running anterior to the common carotid artery until anterior mediastinal level. Clinicians should be aware of the rare possibility of duplicated IJVs in patients presenting with neck swelling. The development of imaging technics have revealed more cases of duplicated internal juguler vein.

  7. Vein morphology, host rock deformation and the origin of the fabrics of echelon mineral veins

    Science.gov (United States)

    Nicholson, R.

    A system of sigmoidal echelon veins from a sample of sandstone from the Upper Carboniferous Culm sequence of southwest England is described. Veins are separated from one another by strips of sandstone, and divided internally by thin seams with crack—seal fabrics. The latter extend as thin veins into the sandstone host rock without change of fabric. Seams appear to be merely parts of crack—seal veins formed in a first phase of deposition in only minutely opened fractures. This phase ended as rates of fracture opening greatly increased. To allow for this widespread opening host rock between dilatating fractures (sandstone strips and seams) had to be deformed. This deformation was limited, however, to rotation, bending and fracture. Shear displacement was a function of dilatation, not zone-parallel ductile shear strain. The textures of the quartz and carbonate aggregates filling the sigmoidal veins show that second-phase crystallization took place into cavities opening more rapidly than growth was able to fill them. Growth for the greater part took place from fibres in seams and not off vein walls of the sandstone host rock. Coarsest aggregates fill the arcs of folds in seams, where rates of vein opening might be expected to have been highest and the scope for competitive cavity growth greatest.

  8. The Use Of The VEINES-QOL/Sym Questionnaire In Patients Operated For Varicose Veins

    Directory of Open Access Journals (Sweden)

    Migdalski Łukasz

    2015-10-01

    Full Text Available Venous insufficiency is a common, chronic disease that affects nearly half of the population in highly developed countries. The vast majority of affected patients suffer from varicose veins (VV. Recently, the priority in medicine has been patient satisfaction with treatment and high quality of life. Therefore, disease-specific questionnaires that measure quality of life have been developed. One of these is VEINES-QOL/Sym with two subscales that assess quality of life and disease symptoms. To date, it has been used to examine patients with venous ulcers and thrombosis. No data are available concerning the use of VEINES to assess patients after VV surgery.

  9. Huge Trombus including Left Renal Vein, Ovarian Vein, and Inferior Vena Cava Mimicking Renal Colic

    Directory of Open Access Journals (Sweden)

    Sakir Ongun

    2014-01-01

    Full Text Available A 31-year-old female presented with acute left flank pain; she had a C/S at the postpartum day 24. Ureteral stone was suspected but ultrasound examination was normal. Then Doppler ultrasound revealed a trombus in left renal vein and inferior vena cava. Contrast enhanced MDCT scan showed swelled and nonfunctional left kidney, a trombus including distal part of left ovarian vein, left renal vein, and inferior vena cava. We started anticoagulation treatment. Further examination revealed diagnosis of chronic myeloproliferative disease. The trombus was completely recanalized at 3-month followup.

  10. Internal vein texture and vein evolution of the epithermal Shila-Paula district, southern Peru.

    OpenAIRE

    Chauvet, Alain; Bailly, Laurent; André-Mayer, Anne-Sylvie; Monié, Patrick; Cassard, Daniel; Llosa Tajada, Fernando; Rosas Vargas, Juan; Tuduri, Johann

    2006-01-01

    The epithermal Shila-Paula Au–Ag district is characterized by numerous veins hosted in Tertiary volcanic rocks of the Western Cordillera (southern Peru). Field studies of the ore bodies reveal a systematic association of a main E–W vein with secondary N55–60°W veins—two directions that are also reflected by the orientation of fluid-inclusion planes in quartz crystals of the host rock. In areas where this pattern is not recognized, such as the Apacheta sector, vein emplacement seems to have be...

  11. Oversized vein grafts develop advanced atherosclerosis in hypercholesterolemic minipigs

    Directory of Open Access Journals (Sweden)

    Thim Troels

    2012-03-01

    Full Text Available Abstract Background Accelerated atherosclerosis is the main cause of late aortocoronary vein graft failure. We aimed to develop a large animal model for the study of pathogenesis and treatment of vein graft atherosclerosis. Methods An autologous reversed jugular vein graft was inserted end-to-end into the transected common carotid artery of ten hypercholesteroemic minipigs. The vein grafts were investigated 12-14 weeks later with ultrasound and angiograpy in vivo and microscopy post mortem. Results One minipig died during follow up (patent vein graft at autopsy, and one vein graft thrombosed early. In the remaining eight patent vein grafts, the mean (standard deviation intima-media thickness was 712 μm (276 μm versus 204 μm (74 μm in the contralateral control internal jugular veins (P diameter of artery. No plaques were found in four non-oversized vein grafts (P Conclusions Our model of jugular vein graft in the common carotid artery of hypercholesterolemic minipigs displayed the components of human vein graft disease, i.e. thrombosis, intimal hyperplasia, and atherosclerosis. Advanced atherosclerosis, the main cause of late failure of human aortocoronary vein grafts was only seen in oversized grafts. This finding suggests that oversized vein grafts may have detrimental effects on patient outcome.

  12. An unusual case: right proximal ureteral compression by the ovarian vein and distal ureteral compression by the external iliac vein

    Directory of Open Access Journals (Sweden)

    Halil Ibrahim Serin

    2015-12-01

    Full Text Available A 32-years old woman presented to the emergency room of Bozok University Research Hospital with right renal colic. Multidetector computed tomography (MDCT showed compression of the proximal ureter by the right ovarian vein and compression of the right distal ureter by the right external iliac vein. To the best of our knowledge, right proximal ureteral compression by the ovarian vein together with distal ureteral compression by the external iliac vein have not been reported in the literature. Ovarian vein and external iliac vein compression should be considered in patients presenting to the emergency room with renal colic or low back pain and a dilated collecting system.

  13. Left renal vein compression syndrome ("nutcracker phenomenon").

    Science.gov (United States)

    Stassen, C M; Weil, E H; Janevski, B K

    1989-06-01

    Four cases are presented with clinical diagnosis of scrotal varicocele on the left side, and one case with ureter varices and left-sided haematuria as a result of compression of the left renal vein between the aorta and superior mesenteric artery (SMA), also known as "nutcracker phenomenon". The clinical signs and the radiological diagnostic methods of the condition are discussed. PMID:2544950

  14. Left renal vein compression syndrome ('nutcracker phenomenon')

    International Nuclear Information System (INIS)

    Four cases are presented with clinical diagnosis of scrotal varicocele on the left side, and one case with ureter varices and left-sided haematuria as a result of compression of the left renal vein between the aorta and superior mesenteric artery (SMA), also known as 'nutcracker phenomenon'. The clinical signs and the radiological diagnostic methods of the condition are discussed. (orig.)

  15. Risk factors of thrombosis in abdominal veins

    Institute of Scientific and Technical Information of China (English)

    Amit Kumar Durra; Ashok Chacko; Biju George; Joseph Anjilivelil Joseph; Sukesh Chandran Nair; Vikram Mathews

    2008-01-01

    AIM: To estimate the prevalence of inherited and acquired thrombophilic risk factors in patients with abdominal venous thrombosis and to compare the risk factor profiles between Budd-Chiari syndromes (BCS) and splanchnic vein thrombosis (SVT).METHODS: In this retrospective study, 36 patients with abdominal venous thrombosis were studied.The patients were divided into Budd-Chiari group (hepatic vein, IVC thrombosis) and splanchnic venous thrombosis group (portal, splenic, superior mesenteric veins) based on the veins involved. Hereditary and acquired thrombophilic risk factors were evaluated in all patients.RESULTS: Twenty patients had SVT, 14 had BCS,and 2 had mixed venous thrombosis. Ten patients (28%) had hereditary and 10 patients (28%) acquired thrombophilic risk factors. The acquired risk factors were significantly more common in the SVT group (SVT vs BCS:45% vs 7%,x2=5.7,P=0.02) while hereditary risk factors did not show significant differences between the two groups (SVT vs BCS: 25%vs 36%, x2=0.46,P=0.7). Multiple risk factors were present in one (7%) patient with BCS and in 3 patients (15%) with SVT. No risk factors were identified in 57% of patients with BCS and in 45% of patients with SVT.CONCLUSION: Hereditary and acquired risk factors play an important role in the etiopathogenesis of abdominal venous thrombosis. Acquired risk factors are significantly more common in SVT patients while hereditary factors are similar in both groups.

  16. Complete guidewire retention after femoral vein catheterization.

    Science.gov (United States)

    Cat, Bahar Gulcay; Guler, Sertac; Soyuduru, Murat; Guven, Ibrahim; Ramadan, Hayri

    2015-01-01

    Central venous catheters (CVCs) are often used for various purposes in the emergency departments (ED). The main uses of CVCs in the EDs are emergent hemodialysis, in situations where peripheral vein catheterization cannot be achieved, and continuous invasive hemodynamic monitoring. The complications related to CVC insertion are usually mechanical and observed in the near term after the procedure. Retained CVC guidewire after catheterization is a rare complication in the published reports and usually related with intra- or postoperative settings and jugular or subclavian vein. The present study reported a young female patient who underwent left femoral vein catheterization 6 months earlier in an intensive care unit of another hospital and was diagnosed with complete guidewire retention in the ED. To the best of the authors' knowledge, this is the first case in published reports with a diagnosis of retained CVC guidewire with retrograde migration into the femoral vein. Surprisingly, the patient developed no thrombotic or embolic complication during this 6-month period. PMID:26657235

  17. Puzzles in practice: splenic vein thrombosis.

    Science.gov (United States)

    McIntyre, Brittany; Marsh, Melanie; Walden, Jeffrey

    2016-06-01

    This report details a 58-year-old gentleman who presented to his outpatient primary care physician's clinic several times over four weeks for ongoing epigastric pain radiating into his left flank, dry heaving, and constipation. He was presumed to have gastritis at each visit and prescribed escalating doses of proton pump inhibitors. Due to the unrelenting pain, he eventually was admitted to the hospital and diagnosed with splenic vein thrombosis after computed tomography imaging of the abdomen. Our literature search revealed that pancreatic pathology is overwhelmingly the contributing factor to splenic vein thrombosis. Our patient had prominent collateral vasculature, suggesting that his splenic vein thrombosis was chronic in nature and likely the cause of his ongoing abdominal pain. Splenic vein thrombosis is an uncommon cause of abdominal pain, but one that should be included in the treating physician's differential diagnoses when abdominal pain is ongoing despite medical therapy. Although he had no evidence of initial findings on radiography, our patient was eventually diagnosed with biopsy-proven pancreatic cancer. Our case report demonstrates how patients presenting with persistent or worsening abdominal pain despite the use of proton pump inhibitors or other acid reducing agents and potential 'red flag' findings such as decreased appetite and weight loss should be worked up for other potential sources of abdominal pathology. PMID:27157637

  18. Who Is at Risk for Deep Vein Thrombosis?

    Science.gov (United States)

    ... Risk for Deep Vein Thrombosis? Explore Deep Vein Thrombosis What Is... Other Names Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments Prevention Living With Clinical Trials Links Related Topics ...

  19. What Are the Signs and Symptoms of Deep Vein Thrombosis?

    Science.gov (United States)

    ... Symptoms of Deep Vein Thrombosis? Explore Deep Vein Thrombosis What Is... Other Names Causes Who Is at Risk Signs & Symptoms Diagnosis Treatments Prevention Living With Clinical Trials Links Related Topics ...

  20. New Portal-Superior Mesenteric Vein Reconstructions Using First Jejunal Vein Flap in Pancreaticoduodenectomy.

    Science.gov (United States)

    Takemura, Nobuyuki; Miki, Kenji; Kosuge, Tomoo

    2016-06-01

    Pancreaticoduodenectomy (PD) is the only potential treatment for pancreatic head adenocarcinomas, which are sometimes located close to or invade the portal-superior mesenteric vein (PSMV). Surgeons often attempt to obtain a negative resectional margin after resection of the PSMV. This attempt requires PSMV reconstruction through graft replacements or end-to-end anastomosis; however, possible complications should be concerned including anastomosis stenosis, damage to some of the PSMV branches, prosthetic graft infection, and that associated with autologous graft harvesting. The first jejunal artery and vein are often resected in PD with the intent of lymphadenectomy. In this study, jejunal vein flap was used for PSMV reconstruction without causing damage to any of the PSMV branches in two patients. Here, we describe the new methods of PSMV reconstruction using first jejunal vein flap in PD. PMID:26801505

  1. Vein thromboembolism prevention in stroke patients

    Directory of Open Access Journals (Sweden)

    Savić Dejan

    2010-01-01

    Full Text Available Introduction Having in mind the rate of occurrence and clinical importance, venous thromboembolism implies venous thrombosis and pulmonary embolism as a result of embolisation of the thrombotic particles from deep veins or pelvic veins. Venous thrombosis of the deep veins may result in chronic vein insufficiency, but the primary medical problem is the possibility of development of pulmonary embolism which may cause permanent respiratory function damage or even fatal outcome. Venous thromboembolism prevention in stroke The high incidence of deep vein thrombosis (30% clinically and up to 50% subclinically in acute stroke hemiparetic and bed ridden patients within two weeks from the onset and 1-2% pulmonary embolism with the fatal outcome in the first month clinically and 17% of all fatal outcomes in postmortem investigations present a necessity for the early venous thromboembolism prevention. On the other hand, the most powerful prevention strategy - anticoagulation has important limitations in acute stroke patients: almost impossible to be used in cerebral haemorrhage and a great risk for the development of hemorrhagic transformation in cerebral infarction. The fact that other prevention strategies have limited value requires an estimation of efectivity-risk ratio in venous thromboembolism prevention in stroke. Conclusion Venous thromboembolism prevention in stroke patients is necessary because of a greater risk for venous thromboembolism in these patients according to the nature of illness and functional disability, but also a problem because of limited possibility to recommend the proper medicament according to the risk of serious complications. The necessity of preventing venous thromboembolism and estimation of efficiency-risk ratio in stroke patients, beside plenty of studies and consensus conferences, remain individual and often very difficult.

  2. Two cases of jugular vein thrombosis in severely burned patients

    OpenAIRE

    Cen H; He X

    2013-01-01

    Hanghui Cen, Xiaojie HeDepartment of Burn, The Second Affiliated Hospital, Zhejiang University Medical College, Hangzhou, People’s Republic of ChinaAbstract: Here we present two cases of jugular vein thrombosis in burn patients, with diagnosis, risk factor analysis, and treatment approaches. Severely burned patients have high risk of deep vein thrombosis occurrence due to multiple surgeries. The deep vein catheter should be carefully performed. Once deep vein thrombosis is detected, a w...

  3. Evaluation of left renal vein entrapment using multidetector computed tomography

    Energy Technology Data Exchange (ETDEWEB)

    Poyraz, Ahmet K.; Onur, Mehmet R. [Dept. of Radiology, Firat Univ. School of Medicine, Elazig (Turkey)], e-mail: akursadpoyraz@yahoo.com.tr; Firdolas, Fatih [Dept. of Urology, Firat Univ. School of Medicine, Elazig (Turkey); Kocakoc, Ercan [Dept. of Radiology, Bezmialem Vakif Univ., School of Medicine, Istanbul (Turkey)

    2013-03-15

    Background: Nutcracker syndrome, also called left renal vein entrapment syndrome, is a cause of non-glomerular hematuria with difficulties in diagnosis. Multidetector computed tomography (MDCT) is a powerful tool to prevent unnecessary diagnostic procedures. Purpose: To retrospectively determine the prevalence of nutcracker phenomenon and nutcracker syndrome seen in MDCT in consecutive patients. Material and Methods: The institutional review board approved the study and waived the requirement for informed consent. Abdominal contrast-enhanced MDCT scans were reviewed from 1000 consecutive patients. MDCT scan assessment included renal vein diameter measurements and evaluation for the presence of anterior or posterior left renal vein entrapment. Electronic medical records and urine analysis reports of patients with left renal vein entrapment were reviewed. Student's t test was used to assess differences in renal vein diameter in patients with left renal vein entrapment. Results: Left renal vein entrapment was observed in 10.9% (109), retroaortic left renal vein in 6.5% (65), entrapment of left renal vein between superior mesenteric artery and aorta in 4.1% (41), and circumaortic left renal vein in 0.3% (3) of patients. Mean diameters of right (8.8 {+-} 1.9 mm) and unentrapped left (8.9 {+-} 1.8 mm) renal veins were not significantly different (P = 0.1). The mean diameter of anterior entrapped left renal veins (10.3 {+-} 2 mm) was significantly greater (P = 0.04) than contralateral renal veins (8.6 {+-} 2.1 mm) in their widest portion. In 8.8% of patients with the left renal vein entrapment, urine analysis showed isomorphic hematuria or proteinuria with no other known cause. Varicocele and pelvic congestion were seen in 5.5% of patients with the left renal vein entrapment. Conclusion: Left renal vein entrapment is not a rare entity and renal nutcracker phenomenon might be underdiagnosed.

  4. EndoVascular Laser Therapy (EVLT) of Varicose Veins

    OpenAIRE

    S. Akhlaghpour; M.R. Zafar Ghandi; Ebrahimi, M.; Alinaghizadeh

    2005-01-01

    Introduction & Background: Tens of millions of people – up to 40% of women and 25% of men – suffer from lower limb varicose veins. Several risk factors are also identified including genetics, gender, age, obesity, hor-mones, pregnancy, and occupation. Sclerotheraphy is commonly used to treat small varicose veins. Medium-sized and large varicose veins can be removed by a surgical procedure called Stab avulsion or phlebectomy. EVLT is a new alternative surgical method for varicose veins. Pa...

  5. Image Quality Enhancement Using the Direction and Thickness of Vein Lines for Finger-Vein Recognition

    OpenAIRE

    Young Ho Park; Kang Ryoung Park

    2012-01-01

    On the basis of the increased emphasis placed on the protection of privacy, biometric recognition systems using physical or behavioural characteristics such as fingerprints, facial characteristics, iris and finger‐vein patterns or the voice have been introduced in applications including door access control, personal certification, Internet banking and ATM machines. Among these, finger‐vein recognition is advantageous in that it involves the use of inexpensive and small devices that are diffic...

  6. 21 CFR 880.6970 - Liquid crystal vein locator.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Liquid crystal vein locator. 880.6970 Section 880... Devices § 880.6970 Liquid crystal vein locator. (a) Identification. A liquid crystal vein locator is a... skin by displaying the color changes of heat sensitive liquid crystals (cholesteric esters)....

  7. Ligation of superior mesenteric vein and portal to splenic vein anastomosis after superior mesenteric-portal vein confluence resection during pancreaticoduodenectomy – Case report

    Directory of Open Access Journals (Sweden)

    Jianlin Tang

    2014-12-01

    Conclusion: The lessons we learned are (1 Before SMPV confluence resection, internal jugular vein graft should be ready for reconstruction. (2 Synthetic graft is an alternative for internal jugular vein graft. (3 Direct portal vein to SMV anastomosis can be achieved by mobilizing liver. (4 It is possible that venous collaterals secondary to SMV tumor obstruction may have allowed this patient's post-operative survival.

  8. Augmented reality based real-time subcutaneous vein imaging system.

    Science.gov (United States)

    Ai, Danni; Yang, Jian; Fan, Jingfan; Zhao, Yitian; Song, Xianzheng; Shen, Jianbing; Shao, Ling; Wang, Yongtian

    2016-07-01

    A novel 3D reconstruction and fast imaging system for subcutaneous veins by augmented reality is presented. The study was performed to reduce the failure rate and time required in intravenous injection by providing augmented vein structures that back-project superimposed veins on the skin surface of the hand. Images of the subcutaneous vein are captured by two industrial cameras with extra reflective near-infrared lights. The veins are then segmented by a multiple-feature clustering method. Vein structures captured by the two cameras are matched and reconstructed based on the epipolar constraint and homographic property. The skin surface is reconstructed by active structured light with spatial encoding values and fusion displayed with the reconstructed vein. The vein and skin surface are both reconstructed in the 3D space. Results show that the structures can be precisely back-projected to the back of the hand for further augmented display and visualization. The overall system performance is evaluated in terms of vein segmentation, accuracy of vein matching, feature points distance error, duration times, accuracy of skin reconstruction, and augmented display. All experiments are validated with sets of real vein data. The imaging and augmented system produces good imaging and augmented reality results with high speed. PMID:27446690

  9. Lower extremity dep vein thrombosis in children

    International Nuclear Information System (INIS)

    Of 113 leg venograms performed in patients of all ages between 1969 and 1982, 68 were in children 16 years old or less. The patients were all studied on a tilt table (method of Rabinov and Paulin) in a head-up, 40-500 incline without tourniquets, supporting their weight on the unaffected leg. Among the 68 venograms, 12 (18%) were positive for deep vein thrombosis. The clinical settings for thrombosis in children were post-catheterization (two patients), post surgery (two), tumor/tumor therapy (three), drug abuse (one), and idiopathic (three). There were no long-term clinical sequelae in five patients. Pulmonary infarction occurred in three, and three patients required either long-term anticoagulation or IVC clipping. Clinical diagnosis is no more accurate for the diagnosis of deep vein thrombosis in children than it is in adults. Venography is the best method for making an accurate diagnosis and directing subsequent therapy.(orig.)

  10. Emergency intravenous access through the femoral vein.

    Science.gov (United States)

    Swanson, R S; Uhlig, P N; Gross, P L; McCabe, C J

    1984-04-01

    A study was undertaken to assess the efficacy and safety of femoral venous catheterization for resuscitation of critically ill patients in the emergency department setting. From May 1982 to April 1983, 100 attempts were made at percutaneous insertion of a large-bore catheter into the femoral veins of patients presenting to our emergency department in cardiac arrest or requiring rapid fluid resuscitation. Eighty-nine attempts were successful. Insertion was generally considered easy, and flow rates were excellent. The only noted complications were four arterial punctures and one minor groin hematoma. This study suggests that short-term percutaneous catheterization of the femoral vein provides rapid, safe, and effective intravenous access. PMID:6703430

  11. Visualization of calf veins by color flow imaging.

    Science.gov (United States)

    van Bemmelen, P S; Bedford, G; Strandness, D E

    1990-01-01

    Both indirect and direct noninvasive tests have been shown to be useful for the detection of deep venous thrombi involving the proximal veins (popliteal to inferior vena cava). However, thrombi that are confined to the calf veins will not affect venous outflow and cannot be detected by the plethysmographic methods. B-mode imaging, while excellent for the major deep veins, is also limited in the calf region because the veins are small, and imaging resolution is not always adequate to permit visualization of these smaller veins. With the availability of duplex scanning with "slow flow" color capability, these veins lend themselves to study. In 30 normal subjects, we were able to visualize all paired veins from the level of the ankle to the popliteal fossa. The clinical implications of this approach are discussed. PMID:2181759

  12. Absent right superior caval vein in situs solitus

    DEFF Research Database (Denmark)

    Lytzen, Rebekka; Sundberg, Karin; Vejlstrup, Niels

    2015-01-01

    Introduction In up to 0.07% of the general population, the right anterior cardinal vein obliterates and the left remains open, creating an absent right superior caval vein and a persistent left superior caval vein. Absent right superior caval vein is associated with additional congenital heart...... disease in about half the patients. We wished to study the consequences of absent right superior caval vein as an incidental finding on prenatal ultrasonic malformation screening. Material and methods This is a retrospective case series study of all foetuses diagnosed with absent right superior caval vein...... at the national referral hospital, Rigshospitalet, Denmark, from 2009 to 2012. RESULTS: In total, five cases of absent right superior caval vein were reviewed. No significant associated cardiac, extra-cardiac, or genetic anomalies were found. Postnatal echocardiographies confirmed the diagnosis and...

  13. NET impact on deep vein thrombosis

    OpenAIRE

    Fuchs, Tobias A.; Brill, Alexander; Wagner, Denisa D.

    2012-01-01

    Deep vein thrombosis (DVT) is a major health problem that requires improved prophylaxis and treatment. Inflammatory conditions such as infection, cancer and autoimmune diseases are risk factors for DVT. We and others have recently shown that extracellular DNA fibers produced in inflammation and known as neutrophil extracellular traps (NETs) contribute to experimental DVT. NETs stimulate thrombus formation and coagulation and are abundant in thrombi in animal models of DVT. It appears that, in...

  14. Brucellosis Associated with Deep Vein Thrombosis

    OpenAIRE

    Tolaj, Ilir; Mehmeti, Murat; Ramadani, Hamdi; Tolaj, Jasmina; Dedushi, Kreshnike; Fejza, Hajrullah

    2014-01-01

    Over the past 10 years more than 700 cases of brucellosis have been reported in Kosovo, which is heavily oriented towards agriculture and animal husbandry. Here, brucellosis is still endemic and represents an uncontrolled public health problem. Human brucellosis may present with a broad spectrum of clinical manifestations; among them, vascular complications are uncommon. Hereby we describe the case of a 37-year-old male patient with brucellosis complicated by deep vein thrombosis on his left ...

  15. INTERNAL JUGULAR VEIN THROMBOSIS TWO DIFFERENT ETIOLOGIES

    OpenAIRE

    2005-01-01

    Internal Jugular vein (IJV) thrombosis is a rare entity. It is usually secondary to various etiologies such as catheter, malignancy, trauma, infection and hypercoagulable status. Associated malignancies, either known or occult, are also uncommon and not well documented in the etiology of IJV thrombosis. We reported IJV thrombosis with two different pathologies i.e. malignacy and congestive heart failure. The diagnosis of IJV thrombosis was established with Doppler ultrasound and CT scan. Thes...

  16. Deep vein thrombosis: diagnosis, treatment, and prevention

    Energy Technology Data Exchange (ETDEWEB)

    Stewart, W.P.; Youngswick, F.D.

    Deep vein thrombosis (DVT) is a dangerous complication that may present after elective foot surgery. Because of the frequency with which DVT occurs in the elderly patient, as well as in the podiatric surgical population, the podiatrist should be acquainted with this entity. A review of the diagnosis, treatment, prevention, and the role of podiatry in the management of DVT is discussed in this paper.

  17. Retinal vein occlusion in Benin City, Nigeria

    OpenAIRE

    Uhumwangho, Odarosa M.; Darlingtess Oronsaye

    2016-01-01

    Background: Retinal vein occlusion (RVO) is the most common occlusive retinal vascular disorder and results in varying degrees of visual loss. Aim: To determine the pattern of presentation, risk factors, and treatment outcomes in a group of patients with RVO seen in a tertiary hospital in Nigeria. Materials and Methods: Medical records of patients who presented to the University of Benin Teaching Hospital, Benin City, Nigeria in whom a diagnosis of RVO was made over a 5 years period were revi...

  18. Robust Palm Vein Recognition Using LMKNCN Classification

    OpenAIRE

    M. Senthil Kumar,; Gayathri, R.

    2014-01-01

    This paper presents a novel approach to improve the recognition percentage of palm-vascular-based authentication systems presented in the literature. The proposed method efficiently accommodates the rotational, translational changes and potential deformations by encoding the orientation preserving features. The proposed palm-vein approach is compared with other existing methods and obtained an improved performance in both verification and recognition scenarios. The experimenta...

  19. Endovenous laser therapy for varicose vein

    OpenAIRE

    Erwin Mulia; Iwan Dakota; Hananto Andriantoro; Kaligis, R. W. M.; Ismoyo Sunu

    2013-01-01

    Laser has become a useful technology in treating venous incompetence especially superficial venous disease. Introduction of endovenous thermal ablation through endovenous laser therapy helped by duplex ultrasound guidance has provided an alternative for traditional saphenous vein stripping. High success rate, minor complications, and minimally invasive technique provide the advantages over traditional treatment. In this case illustrated, the endovenous laser therapy used for great saphenous v...

  20. Internal Jugular Vein Thrombosis following Oropharyngeal Infection

    OpenAIRE

    Asli Bostanci; Murat Turhan

    2015-01-01

    Internal jugular vein thrombosis (IJVT) is a rare condition which may lead to life-threatening complications such as sepsis and pulmonary embolism. Prolonged central venous catheterization, intravenous (IV) drug use, trauma, and radiotherapy are the most frequent causes of the IJVT. IJVT that develops after the oropharyngeal infection is a quite rare situation today. In this paper, a 37-year-old woman was presented; swelling occurred on her neck after acute tonsillitis and she was diagnosed w...

  1. Laser photocoagulation for retinal vein occlusion

    Directory of Open Access Journals (Sweden)

    K. A. Mirzabekova

    2015-03-01

    Full Text Available Retinal vein occlusion (RVO is one of the leading causes of permanent vision loss. In adults, central retinal vein occlusion (CRVO occurs in 1.8% while branch retinal vein occlusion (BRVO occurs in 0.2%. Treatment strategy and disease prognosis are determined by RVO type (ischemic/non-ischemic. Despite numerous studies and many current CRVO and BRVO treatment approaches, the management of these patients is still being debated. Intravitreal injections of steroids (triamcinolone acetate, dexamethasone and vascular endothelial growth factor (VEGF inhibitors (bevacizumab, ranibizumab were shown to be fairly effective. However, it is unclear whether anti-VEGF agents are reasonable in ischemic RVOs. Laser photocoagulation remains the only effective treatment of optic nerve head and/or retinal neovascularization. Laser photocoagulation is also indicated for the treatment of macular edema. Both threshold and sub-threshold photocoagulation may be performed. Photocoagulation performed with argon (514 nm, krypton (647 nm, or diode (810 nm laser for macular edema provides similar results (no significant differences. The treatment may be complex and include medication therapy and/or surgery. Medication therapy includes anti-aggregant agents and antioxidants, i.e., emoxypine which may be used in acute RVO as well as in post-thrombotic retinopathy. 

  2. Development of HIFU Therapy System for Lower Extremity Varicose Veins

    International Nuclear Information System (INIS)

    High-intensity focused ultrasound (HIFU) treatment utilizing microbubbles was investigated in the present study. It is known that microbubbles have the potential to enhance the heating effects of an ultrasound field. In this study, the heat accompanying microbubble oscillation was used to occlude varicose veins. Alteration of veins was observed after ultrasound irradiation. Veins were resected by stripping. In this study, two vein conditions were adopted during HIFU irradiation; non-compressed and compressed. Compressing the vein was expected to improve occlusion by rubbing the altered intima under compressed conditions. The frequency of the ultrasound was 1.7 MHz, the intensity at the focus was 2800 W/cm2, and the irradiation time was 20 s. In this study, the contrast agent Levovist registered was chosen as a microbubble source, and the void fraction (ratio of total gas volume to liquid) in the vein was fixed at 10-5. Under non-compressed conditions, changes were observed only at the adventitia of the vein anterior wall. In contrast, under compressed conditions, changes were observed from the intima to the adventitia of both the anterior and posterior walls, and they were partly stuck together. In addition, more experiments with hematoxylin-eosin staining suggested that the changes in the vein were more substantial under the latter conditions. From these results, it was confirmed that the vein was occluded more easily with vein compression.

  3. Automated detection of periventricular veins on 7 T brain MRI

    Science.gov (United States)

    Kuijf, Hugo J.; Bouvy, Willem H.; Zwanenburg, Jaco J. M.; Viergever, Max A.; Biessels, Geert Jan; Vincken, Koen L.

    2015-03-01

    Cerebral small vessel disease is common in elderly persons and a leading cause of cognitive decline, dementia, and acute stroke. With the introduction of ultra-high field strength 7.0T MRI, it is possible to visualize small vessels in the brain. In this work, a proof-of-principle study is conducted to assess the feasibility of automatically detecting periventricular veins. Periventricular veins are organized in a fan-pattern and drain venous blood from the brain towards the caudate vein of Schlesinger, which is situated along the lateral ventricles. Just outside this vein, a region-of- interest (ROI) through which all periventricular veins must cross is defined. Within this ROI, a combination of the vesselness filter, tubular tracking, and hysteresis thresholding is applied to locate periventricular veins. All detected locations were evaluated by an expert human observer. The results showed a positive predictive value of 88% and a sensitivity of 95% for detecting periventricular veins. The proposed method shows good results in detecting periventricular veins in the brain on 7.0T MR images. Compared to previous works, that only use a 1D or 2D ROI and limited image processing, our work presents a more comprehensive definition of the ROI, advanced image processing techniques to detect periventricular veins, and a quantitative analysis of the performance. The results of this proof-of-principle study are promising and will be used to assess periventricular veins on 7.0T brain MRI.

  4. Computed tomographic evaluation of the portal vein in the hepatomas

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Kee Hyung; Lee, Seung Chul; Bae, Man Gil; Seo, Heung Suk; Kim, Soon Yong; Lee, Min Ho; Kee, Choon Suhk; Park, Kyung Nam [Hanyang University College of Medicine, Seoul (Korea, Republic of)

    1986-10-15

    Computed tomography and pornographic findings of 63 patients with hepatoma, undergone hepatic angiography and superior mesenteric pornography for evaluation of tumor and thrombosis of portal vein and determination of indication of transcatheter arterial embolization for palliative treatment of hepatoma from April, 85 to June, 86 in Hanyang university hospital, were reviewed. The results were as follows: 1. In 36 cases, portal vein thrombosis was detected during photography. Nineteen of 37 cases which revealed localized hepatoma in the right lobe of the liver showed portal vein thrombosis; 9 of 11 cases of the left lobe; 8 of 14 cases which were involved in entire liver revealed thrombosis. One case localized in the caudate lobe showed no evidence of invasion to portal vein. 2. Twenty-four of 34 cases with diffuse infiltrative hepatoma revealed portal vein thrombosis and the incidence of portal vein thrombosis in this type were higher than in the cases of the nodular type. 3. The portal vein thrombosis appeared as filling defects of low density in the lumen of the portal veins in CT and they did not reveal contrast enhancement. 4. CT revealed well the evidence of obstructions in the cases of portal vein thrombosis and the findings were well-corresponded to the findings of the superior mesenteric photography. 5. Five of the cases of the portal vein thrombosis were missed in the CT and the causes were considered as due to partial volume effect of enhanced portal vein with partial occlusion or arterioportal shunts. 6. Six of 13 cases with occlusion of main portal vein showed cavernous transformation and they were noted as multiple small enhanced vascularities around the porta hepatis in the CT. According to the results, we conclude that CT is a useful modality to detect the changes of the portal veins in the patients of the hepatoma.

  5. Stenting of iliac vein obstruction following catheter-directed thrombolysis in lower extremity deep vein thrombosis

    Institute of Scientific and Technical Information of China (English)

    MENG Qing-you; LI Xiao-qiang; JIANG Kun; QIAN Ai-min; SANG Hong-fei; RONG Jian-jie; DUAN Peng-fei

    2013-01-01

    Background Catheter-directed thrombolysis (CDT) for deep venous thrombosis (DVT) of the lower extremity has good effect,but whether iliac vein stent placement after thrombolytic therapy is still controversial.The goal of this study was to evaluate the efficacy of stent placement in the iliac vein following CDT in lower extremity DVT.Methods This was a single-center,prospective,randomized controlled clinical trial.After receiving CDT,the major branch of the distal iliac vein was completely patent in 155 patients with lower extremity DVT,and 74 of these patients with iliac vein residual stenosis of >50% were randomly divided into a control group (n=29) and a test group (n=45).In the test group,stents were implanted in the iliac vein,whereas no stents were implanted in the control group.We evaluated the clinical indicators,including patency of the deep vein,C in CEAP classification,Venous Clinical Severity Score (VCSS),and Chronic Venous Insufficiency Questionnaire (CIVIQ) Score.Results All patients had postoperative follow-up visits for a period of 6-24 months.Venography or color ultrasound was conducted in subjects.There was a significant difference between the patency rate at the last follow-up visit (87.5% vs.29.6%) and the 1-year patency rate (86.0% vs.54.8%) between the test and control groups.The change in the C in CEAP classification pre-and post-procedure was significantly different between the test and control groups (1.61±0.21 vs.0.69±0.23).In addition,at the last follow-up visit,VCSS and CIVIQ Score were both significantly different between the test and control groups (7.57±0.27 vs.0.69±0.23; 22.67±3.01 vs.39.34±6.66,respectively).Conclusion The stenting of iliac vein obstruction following CDT in lower extremity DVT may increase the patency of the deep vein,and thus provides better efficacy and quality of life.

  6. Chemical gradients and progressive veining in a partly serpentinized harzburgite

    Science.gov (United States)

    Schwarzenbach, Esther; Caddick, Mark; Beard, James; Bodnar, Robert

    2016-04-01

    Serpentinized ultramafic rocks constitute a major part of the oceanic lithosphere. They form when water interacts with olivine and pyroxene to produce a dense network of veins comprised of secondary minerals: Serpentine + brucite ± magnetite veins occur in olivine, Al-rich serpentine + talc veins occur in orthopyroxene, and Al-rich serpentine ± talc ± brucite veins occur at the boundary between orthopyroxene and olivine. Here, we present a detailed study on a harzburgite from the Santa Elena Ophiolite in Costa Rica that is ~30% serpentinized in order to provide new constraints on the effect of variable water (H2O) and silica (SiO2) activities on vein formation in peridotites. The studied sample records 1) mineralogical and chemical zonations in olivine-hosted veins that show a distinct pattern with increasing width of the veins (consumption of olivine), 2) varying brucite composition depending on whether or not it is associated with magnetite, and 3) chemical gradients in Si, Al, Cr, and Ca at the boundary between orthopyroxene- and olivine-hosted veins. These observed chemical variations suggest fluid mediated mass transport within and between orthopyroxene- and olivine-hosted veins. We use thermodynamic models to show that an increase in vein width and progressive evolution of olivine-hosted veins is accompanied by an increase in water-rock ratios. This is associated with the development of chemical gradients (e.g. gradients in water and silica activity) between the fluid-rich center of serpentine veins and the olivine grain boundaries as typically expressed by the abundance of brucite in the vein center and a dominance of serpentine at the boundary with olivine. The increase in water-rock ratios within the vein center also leads to the formation of magnetite from Fe-rich brucite ± Fe-rich serpentine. Mass transfer between vein core and vein rim may exist on the submicron-scale along grain boundaries of the finely intergrown serpentine-brucite mixture. We

  7. Mineral vein dynamics modeling (FRACS). Phase 1

    Energy Technology Data Exchange (ETDEWEB)

    Urai, J.; Virgo, S.; Arndt, M. [RWTH Aachen (Germany). Geologie-Endogene Dynamik] [and others

    2013-07-15

    The Mineral Vein Dynamics Modeling group ''FRACS'' is a team of 7 research groups from the Universities of Mainz, Aachen, Tuebingen, Karlsruhe, Bayreuth, ETH Zuerich and Glasgow working on an understanding of the dynamic development of fracturing, fluid flow and fracture sealing. World-class field laboratories, especially carbonate sequences from the Oman Mountains are studied and classified. State of the art numerical programs are written, expanded and used to simulate the dynamic interaction of fracturing, flow and resealing and the results are compared with the natural examples. Newest analytical technologies including laser scanning, high resolution X-ray microtomography, fluid inclusion and isotope analysis are performed to understand and compare the results of simulations with natural examples. A new statistical program was developed to classify the natural fracture and vein systems and compare them with dynamic numerical simulations and analytical models. The results of the first project phase are extremely promising. Most of the numerical models have been developed up to the stage where they can be used to simulate the natural examples. The models allow a definition of the first proxies for high fluid pressure and tectonic stresses. It was found out that the Oman Mountains are a complex and very dynamic system that constantly fractures and reseals from the scale of small veins up to the scale of large normal and strike slip faults. The numerical simulations also indicate that the permeability of such systems is not a constant but that the system adjusts to the driving force, for ex-ample high fluid pressure. When the system reseals fast a fluctuating behavior can be observed in the models where the system constantly fractures and reseals, which is in accordance with the observation of the natural laboratory.

  8. Vestibular tributaries to the vein of the vestibular aqueduct

    DEFF Research Database (Denmark)

    Hansen, Jesper Marsner; Qvortrup, Klaus; Friis, Morten

    2010-01-01

    CONCLUSION: The vein of the vestibular aqueduct drains blood from areas extensively lined by vestibular dark cells (VDCs). A possible involvement in the pathogenesis of an impaired endolymphatic homeostasis can be envisioned at the level of the dark cells area. OBJECTIVES: The aim of this study...... was to investigate the vascular relationship between the vein of the vestibular aqueduct and the vestibular apparatus, with focus on the VDCs. METHODS: Sixteen male Wistar rats were divided into groups of 6 and 10. In the first group, 2 µm thick sections including the vein of the vestibular aqueduct, utricle...... relation to the VDCs in the utricle and the crista ampullaris of the lateral semicircular canal in the vestibular apparatus. One major vein emanated from these networks, which emptied into the vein of the vestibular aqueduct. Veins draining the saccule and the common crus of the superior and posterior...

  9. Internal Jugular Vein Entrapment in a Multiple Sclerosis Patient

    Directory of Open Access Journals (Sweden)

    Marian Simka

    2012-01-01

    Full Text Available We describe a multiple sclerosis patient presenting with compression of the internal jugular vein caused by aberrant omohyoid muscle. Previously this patient underwent balloon angioplasty of the same internal jugular vein. Ten months after this endovascular procedure, Doppler sonography revealed totally collapsed middle part of the treated vein with no outflow detected. Still, the vein widened and the flow was restored when the patient’s mouth opened. Thus, the abnormality was likely to be caused by muscular compression. Surgical exploration confirmed that an atypical omohyoid muscle was squeezing the vein. Consequently, pathological muscle was transected. Sonographic control three weeks after surgical procedure revealed a decompressed vein with fully restored venous outflow. Although such a muscular compression can be successfully managed surgically, future research has to establish its clinical relevance.

  10. Internal Jugular Vein Entrapment in a Multiple Sclerosis Patient

    Science.gov (United States)

    Simka, Marian; Majewski, Eugeniusz; Fortuna, Marek; Zaniewski, Maciej

    2012-01-01

    We describe a multiple sclerosis patient presenting with compression of the internal jugular vein caused by aberrant omohyoid muscle. Previously this patient underwent balloon angioplasty of the same internal jugular vein. Ten months after this endovascular procedure, Doppler sonography revealed totally collapsed middle part of the treated vein with no outflow detected. Still, the vein widened and the flow was restored when the patient's mouth opened. Thus, the abnormality was likely to be caused by muscular compression. Surgical exploration confirmed that an atypical omohyoid muscle was squeezing the vein. Consequently, pathological muscle was transected. Sonographic control three weeks after surgical procedure revealed a decompressed vein with fully restored venous outflow. Although such a muscular compression can be successfully managed surgically, future research has to establish its clinical relevance. PMID:23097738

  11. Incomplete transposition of the common femoral artery and vein.

    Science.gov (United States)

    Leite, J O; Carvalho Ventura, I; Botelho, F E; Costa Galvao, W

    2010-02-01

    Anatomical variations of the great saphenous vein, femoral artery and femoral vein at the inguinal level are rare. Modifications in the anatomical relationships among theses vessel can cause technical difficulties. There are two reports in the literature of the complete transposition of the femoral artery and vein. Both patients had large varicose veins only in the limb that presented the variation, which suggested an extrinsic compression. In the present paper, we report a case study of a patient with an incomplete transposition of the femoral artery and vein. Specifically, the common femoral vein and the saphenofemoral junction were completely overlapped by the common femoral artery. Although this anatomical variation did not present any clinical signs, it required a more complex surgical procedure. PMID:20224538

  12. A single scale retinex based method for palm vein extraction

    OpenAIRE

    Wang, Chongyang; Peng, Ming; Xu, Lingfeng; Chen, Tong

    2016-01-01

    Palm vein recognition is a novel biometric identification technology. But how to gain a better vein extraction result from the raw palm image is still a challenging problem, especially when the raw data collection has the problem of asymmetric illumination. This paper proposes a method based on single scale Retinex algorithm to extract palm vein image when strong shadow presents due to asymmetric illumination and uneven geometry of the palm. We test our method on a multispectral palm image. T...

  13. Deep Vein Thrombosis (DVT) / Pulmonary Embolism (PE) - Blood Clot Forming in a Vein

    Science.gov (United States)

    ... located in a central vein Inherited clotting disorders Preventing DVT The following tips can help prevent DVT: Move around as soon as possible after having been confined to bed, such as after surgery, illness, or injury. If you’re at risk ...

  14. Image Quality Enhancement Using the Direction and Thickness of Vein Lines for Finger-Vein Recognition

    Directory of Open Access Journals (Sweden)

    Young Ho Park

    2012-10-01

    Experimental results from application of our proposed image enhancement method show that the equal error rate (EER of finger‐vein recognition decreases to approximately 0.4% in the case of a local binary pattern‐ based recognition and to approximately 0.3% in the case of a wavelet transform‐based recognition.

  15. Can deep vein thrombosis be predicted after varicose vein operation in women in rural areas?

    Directory of Open Access Journals (Sweden)

    Marcin Warot

    2014-09-01

    Full Text Available [b]Introduction[/b]. Chronic venous disease is a group of symptoms caused by functional and structural defects of the venous vessels. One of the most common aspects of this disease is the occurrence of varicose veins. There are many ways of prevention and treatment of varicose veins, but in Poland the leading one is still surgery. As in every medical procedure there is the possibility of some complications. One of them is deep vein thrombosis (DVT. The diagnosis of DVT can be difficult, especially when access to a specialist is limited, such as in case of rural patients. [b]The aim of the study.[/b] The aim of the study was estimation of the influence of LMWH primary prophylaxis on the formation of postoperative DVT, as well as sensitivity and specificity of clinical examination and D-dimer value in diagnosis of postoperative DVT in women. [b]Materials and methods[/b]. The study was conducted in a group of 93 women operated on in the Department of General, Vascular Surgery and Angiology at the Karol Marcinkowski University of Medical Sciences in Poznań, Poland. The patients had undergone a varicose vein operation and were randomly divided into two groups: A – 48 women receiving LMWH during two days of the perioperative period, B – 45 women receiving LMWH during seven days of the perioperative period. [b]Results[/b]. There was no significant difference in the postoperative DVT complications in both groups. The value of D-dimer > 0.987 mcg/ml and swelling > 1.5 cm of shin (in comparison to the preoperative period plays a significant role in diagnosis of DVT. [b]Conclusions[/b]. The extended primary prophylaxis with LMWH does not affect the amount or quality of thrombotic complications after varicose vein operation. If the DVT occurs, the evaluation of the D – dimer and careful clinical examination can be a useful method for its diagnosis.

  16. Preserved saphenous vein allografts for vascular access.

    Science.gov (United States)

    Piccone, V A; Sika, J; Ahmed, N; LeVeen, H H; DiScala, V

    1978-09-01

    Preserved venous allografts were used as an alternate access procedure in 70 patients receiving dialysis during a three year period. The clinical experience with allograft fistulas revealed an extremely high initial patency rate; absence of infection postoperatively and during three years of dialysis; suitability for dialysis a week after implantation, thus greatly obviating the need for Silastic shunts; a low long term thrombosis rate and the weakly antigenic allograft veins produced no accelerated rejection of subsequently transplanted kidneys. Surviving patients average 172 dialysis treatments per allograft. Allograft fistulas constituted 45 per cent of the last 100 vascular procedures, an indication of the extent of usage. Microscopic examination of grafts retrieved from patients who died during the late follow-up period demonstrated that structural components of the wall of the vein were still identifiable. Allograft venous fistulas offer dependable, safe vascular access, especially in the infection prone patient with diabetes who is receiving dialysis treatment. The clinical results of allograft fistulas suggests a major role for this technique in vascular access operations. PMID:684591

  17. Complications of cerebral vein and sinus thrombosis.

    Science.gov (United States)

    Ferro, José M; Canhâo, P

    2008-01-01

    Thrombosis of the dural sinus and encephalic veins (CVT) is an infrequent condition accounting for less than 1% of all strokes. Several recent prospective series, in particular the large International Study on Cerebral Vein and Dural Sinus Thrombosis cohort, definitely have shown a more benign prognosis compared with that of arterial strokes: CVT has an acute case fatality of less than 5%, and almost 80% of patients recover without sequelae. However, patients surviving the acute phase of CVT are at risk of a number of complications such as recurrence of any thrombotic events in about 7%, recurrence of CVT in about 2-12%, seizures in 5 to 32%, visual loss due to optic atrophy in percentages that range from less than 1 to 5%, presence of dural fistula (there are no data available about exact frequency) and neuropsychological and neuropsychiatric sequelae characterized by aphasia, abulia and depression. However, there is only little information on the long-term neuropsychological outcome. Studies investigating professional status, cognitive performance, depressive symptoms and quality of life evidenced depression and anxiety in 2/3 of CVT patients despite an apparent good recovery in 87% of these patients. Thus, patients should be encouraged to return to previous occupations and hobbies and reassured about the very low risk of recurrence. PMID:18004061

  18. Arterialization and anomalous vein wall remodeling in varicose veins is associated with upregulated FoxC2-Dll4 pathway.

    Science.gov (United States)

    Surendran, Sumi; S Ramegowda, Kalpana; Suresh, Aarcha; Binil Raj, S S; Lakkappa, Ravi Kumar B; Kamalapurkar, Giridhar; Radhakrishnan, N; C Kartha, Chandrasekharan

    2016-04-01

    Varicose veins of lower extremities are a heritable common disorder. Mechanisms underlying its pathogenesis are still vague. Structural failures such as valve weakness and wall dilatation in saphenous vein result in venous retrograde flow in lower extremities of body. Reflux of blood leads to distal high venous pressure resulting in distended veins. In an earlier study, we observed a positive association between c.-512C>T FoxC2 gene polymorphism and upregulated FoxC2 expression in varicose vein specimens. FoxC2 overexpression in vitro in venous endothelial cells resulted in the elevated mRNA expression of arterial endothelial markers such as Delta-like ligand 4 (Dll4) and Hairy/enhancer-of-split related with YRPW motif protein 2 (Hey2). We hypothesized that an altered FoxC2-Dll4 signaling underlies saphenous vein wall remodeling in patients with varicose veins. Saphenous veins specimens were collected from 22 patients with varicose veins and 20 control subjects who underwent coronary artery bypass grafting. Tissues were processed for paraffin embedding and sections were immunostained for Dll4, Hey2, EphrinB2, α-SMA, Vimentin, and CD31 antigens and examined under microscope. These observations were confirmed by quantitative real-time PCR and western blot analysis. An examination of varicose vein tissue specimens by immunohistochemistry indicated an elevated expression of Notch pathway components, such as Dll4, Hey2, and EphrinB2, and smooth muscle markers, which was further confirmed by gene and protein expression analyses. We conclude that the molecular alterations in Dll4-Hey2 signaling are associated with smooth muscle cell hypertrophy and hyperplasia in varicose veins. Our observations substantiate a significant role for altered FoxC2-Dll4 signaling in structural alterations of saphenous veins in patients with varicose veins. PMID:26808710

  19. Subclavian-axillary vein thrombosis: successful treatment with streptokinase.

    OpenAIRE

    Wilson, J. J.; Lesk, D.; Newman, H.

    1984-01-01

    Proximal vein thrombosis has been associated with residual disability from the postphlebetic syndrome in patients receiving symptomatic therapy or heparin and sodium warfarin. This paper describes a man with painless swelling of the right arm secondary to subclavian-axillary vein thrombosis that was successfully treated with streptokinase and conventional anticoagulant therapy.

  20. Coronary artery bypass with glycerol-preserved saphenous vein allografts

    OpenAIRE

    Bortolotti, Uberto; Casarotto, Dino; Frugoni, Carlo; De Mozzi, Pierluigi; Thiene, Gaetano; Gallucci, Vincenzo

    1981-01-01

    Over a 2-year period, 19 patients whose autologous saphenous veins were either unsuitable or unavailable underwent myocardial revascularization with saphenous vein allografts (SVAs) at our institution. All SVAs had been preserved in 98% glycerol at room temperature for at least 3 weeks (average, 7 weeks); before use, they were rinsed with saline and antibiotic solution.

  1. The Incidence and Ecology of Blackberry yellow vein associated virus

    Science.gov (United States)

    Symptoms of vein yellowing and bush decline in blackberry were attributed to infection by a novel crinivirus named Blackberry yellow vein associated virus (BYVaV). The disease is an emerging threat to blackberry production as it can cause substantial yield loss. The objective of this study was to id...

  2. Dorzolamide increases retinal oxygen tension after branch retinal vein occlusion

    DEFF Research Database (Denmark)

    Noergaard, Michael Hove; Bach-Holm, Daniella; Scherfig, Erik;

    2008-01-01

    To study the effect of dorzolamide on the preretinal oxygen tension (RPO(2)) in retinal areas affected by experimental branch retinal vein occlusion (BRVO) in pigs.......To study the effect of dorzolamide on the preretinal oxygen tension (RPO(2)) in retinal areas affected by experimental branch retinal vein occlusion (BRVO) in pigs....

  3. Arteriovenous Fistula Between the Hepatic Artery and the Hepatic Vein

    OpenAIRE

    John M. Howard; Malafa, M.; Coombs, Robert J.; Iannone, Anthony M.

    1989-01-01

    A patient is presented with multiple vascular anomalies in the branches of the celiac axis as well as in the portal vein and its branches. Apparently, unique in the literature is the presence of a large arteriovenous fistula between the hepatic artery and one of the hepatic veins. The anomalies are presumed to be congenital in origin.

  4. Blackberry Yellow Vein Disease is Caused by Multiple Virus Complexes

    Science.gov (United States)

    Blackberry yellow vein disease, with symptoms of vein clearing, yellow mottling, ringspots and plant decline has been observed in blackberry in the southeastern United States since about 2000. At least six viruses have been identified by cloning and sequencing of double-stranded RNA from diseased p...

  5. A study of images of Projective Angles of pulmonary veins

    Energy Technology Data Exchange (ETDEWEB)

    Wang Jue [Beijing Anzhen Hospital, Beijing (China); Zhaoqi, Zhang [Beijing Anzhen Hospital, Beijing (China)], E-mail: zhaoqi5000@vip.sohu.com; Yu Wei; Miao Cuilian; Yan Zixu; Zhao Yike [Beijing Anzhen Hospital, Beijing (China)

    2009-09-15

    Aims: In images of magnetic resonance and computed tomography (CT) there are visible angles between pulmonary veins and the coronary, transversal or sagittal section of body. In this study these angles are measured and defined as Projective Angles of pulmonary veins. Several possible influential factors and characters of distribution are studied and analyzed for a better understanding of this imaging anatomic character of pulmonary veins. And it could be the anatomic base of adjusting correctly the angle of the central X-ray of the angiography of pulmonary veins undergoing the catheter ablation of atrial fibrillation (AF). Method: Images of contrast enhanced magnetic resonance angiography (CEMRA) and contrast enhanced computer tomography (CECT) of the left atrium and pulmonary veins of 137 health objects and patients with atrial fibrillation (AF) are processed with the technique of post-processing, and Projective Angles to the coronary and transversal sections are measured and analyzed statistically. Result: Project Angles of pulmonary veins are one of real and steady imaging anatomic characteristics of pulmonary veins. The statistical distribution of variables is relatively concentrated, with a fairly good representation of average value. It is possible to improve the angle of the central X-ray according to the average value in the selective angiography of pulmonary veins undergoing the catheter ablation of AF.

  6. Internal Jugular Vein Thrombosis following Oropharyngeal Infection

    Science.gov (United States)

    Bostanci, Asli; Turhan, Murat

    2015-01-01

    Internal jugular vein thrombosis (IJVT) is a rare condition which may lead to life-threatening complications such as sepsis and pulmonary embolism. Prolonged central venous catheterization, intravenous (IV) drug use, trauma, and radiotherapy are the most frequent causes of the IJVT. IJVT that develops after the oropharyngeal infection is a quite rare situation today. In this paper, a 37-year-old woman was presented; swelling occurred on her neck after acute tonsillitis and she was diagnosed with IJVT through Doppler ultrasonography and magnetic resonance imaging and managed without complications. Early diagnosis and conservative treatment with broad-spectrum IV antibiotics and anticoagulant agents have a critical importance for the prevention of fatal complications. PMID:26457221

  7. Leiomyosarcoma of the great saphenous vein

    Directory of Open Access Journals (Sweden)

    Alexandre Campos Moraes Amato

    2015-06-01

    Full Text Available A 56-year-old male patient presented with a complaint of two painful, hard, palpable nodules in the right lower limb. A Doppler ultrasound scan revealed the presence of nodules, likely to be neoplastic. Computed angiography showed two solid hypervascular nodules in the right great saphenous vein, fed by branches of the posterior tibial artery. Embolization of the nodules using surgical cyanoacrylate was performed, followed by an excisional biopsy. Anatomical pathology and immunohistochemical analysis identified the nodule as a high-grade leiomyosarcoma, characterized by ten mitotic figures per ten high-power fields, necrosis and cell pleomorphism. Immunohistochemical analysis results were positive for caldesmon and desmin labeling. A second surgical procedure was performed to enlarge the free margins.

  8. On the dragnosis of deep vein thrombosis

    International Nuclear Information System (INIS)

    Clinical and laboratory diagnostic methods were studied in 301 consecutive patients with suspected deep vein thrombosis (DVT). Unexpectedly, phlebography (the reference method) was found to cause DVT in estimated 48 % of patients without initial DVT. Using a new type of contrast medium, however, no thrombotic complications were found. - Neither clinical examination nor plethysmography were found to give reliable results. Using a modified technique for radioisotope detection, high sensitivity to DVT was found with the 125I-fibrinogen uptake test (within 2 days) and a newly developed 99Tcsup(m)-plasmin test (within one hour). Since both tests showed low specificity, they are reliable as screening tests to exclude DVT, but not as independent diagnostic methods. (author)

  9. Internal Jugular Vein Thrombosis following Oropharyngeal Infection

    Directory of Open Access Journals (Sweden)

    Asli Bostanci

    2015-01-01

    Full Text Available Internal jugular vein thrombosis (IJVT is a rare condition which may lead to life-threatening complications such as sepsis and pulmonary embolism. Prolonged central venous catheterization, intravenous (IV drug use, trauma, and radiotherapy are the most frequent causes of the IJVT. IJVT that develops after the oropharyngeal infection is a quite rare situation today. In this paper, a 37-year-old woman was presented; swelling occurred on her neck after acute tonsillitis and she was diagnosed with IJVT through Doppler ultrasonography and magnetic resonance imaging and managed without complications. Early diagnosis and conservative treatment with broad-spectrum IV antibiotics and anticoagulant agents have a critical importance for the prevention of fatal complications.

  10. Multiple vascular anomalies involving testicular, suprarenal arteries and lumbar veins

    Directory of Open Access Journals (Sweden)

    P Jyothsna

    2012-01-01

    Full Text Available Testicular arteries arise from the abdominal aorta and the inferior suprarenal artery from the renal artery. There are reports about variant origin and course of these arteries. Accessory testicular artery is also a common finding but its providing origin to inferior suprarenal artery is an important observation. During a routine dissection of abdomen of approximately 55-year-old male cadaver, unique vascular abnormality was observed. On the left side, a common arterial trunk originating from abdominal aorta immediately branched to give rise to superior testicular and inferior suprarenal arteries, the former after a short course hooked by the left suprarenal vein. In addition, the left suprarenal vein, second left lumbar vein, and left testicular vein joined to form a common trunk which drained into the left renal vein. A sound knowledge of vascular variations in relation to the kidney and suprarenal gland is important to surgeons dissecting the abdominal cavity.

  11. Disastrous Portal Vein Embolization Turned into a Successful Intervention

    Energy Technology Data Exchange (ETDEWEB)

    Dobrocky, Tomas, E-mail: tomas.dobrocky@insel.ch [University of Bern, Department of Interventional, Pediatric and Diagnostic Radiology, Inselspital, University Hospital (Switzerland); Kettenbach, Joachim, E-mail: joachim.kettenbach@stpoelten.lknoe.at [Universitätsklinikum St. Pölten-Lilienfeld, Institute of Medical Radiology, Diagnostic, Intervention (Austria); Lopez-Benitez, Ruben, E-mail: Ruben.lopez@insel.ch; Kara, Levent, E-mail: levent.kara@insel.ch [University of Bern, Department of Interventional, Pediatric and Diagnostic Radiology, Inselspital, University Hospital (Switzerland)

    2015-10-15

    Portal vein embolization (PVE) may be performed before hemihepatectomy to increase the volume of future liver remnant (FLR) and to reduce the risk of postoperative liver insufficiency. We report the case of a 71-year-old patient with hilar cholangiocarcinoma undergoing PVE with access from the right portal vein using a mixture of n-butyl-2-cyanoacrylate and ethiodized oil. During the procedure, nontarget embolization of the left portal vein occurred. An aspiration maneuver of the polymerized plug failed; however, the embolus obstructing portal venous flow in the FLR was successfully relocated into the right portal vein while carefully bypassing the plug with a balloon catheter, inflating the balloon, and pulling the plug into the main right portal vein.

  12. Abnormal draining of great cardiac vein into superior vena cava

    International Nuclear Information System (INIS)

    Full text: A 47-year-old man presented with atypical chest pain in last three months. Physical examination findings were normal. ECG showed normal sinus rhythm. Transthoracic echocardiography revealed normal left and right ventricular systolic functions. ECG gated coronary CT angiography was performed. The patient's coronary CT angiography showed normal coronary arteries, however the great cardiac vein course was abnormal. The course of the vein was not in atrioventicular groove, bypassing the coronary sinus and draining to superior vena cava. The coronary sinus of patient is formed by posterior marginal vein, middle cardiac vein and lateral marginal vein and drained into the right atrium. We also observed subtle myocardial bridges on coronary arteries. Myocardial bridges appeared to explain patient's chest pain. With optimal medical therapy, the patient's symptoms resolved

  13. Left Internal Jugular Vein Thrombosis Due to a Lung Tumor

    Directory of Open Access Journals (Sweden)

    Kuan-Hsing Chen

    2003-06-01

    Full Text Available Deep vein thrombosis is a common disease among Caucasians but is rare in Asia.Venous thrombosis may be fatal, for example by a pulmonary embolism and right or leftatrial thrombosis. Alternatively, deep vein thrombosis may follow a benign pattern such asfemoral and popliteal vein thrombosis. Theories abound regarding the causes of deep veinthrombosis, with the most common theories being long-term stasis and lack of exercise.Internal jugular vein thrombosis is a rare but potentially fatal disease with various causes. Inthe pre-antibiotics era, this disease was frequently associated with deep neck infection.Recently however, local trauma, central catheterization, and repeated intravenous injectionswith drugs have become the leading causes of thrombosis. Spontaneous internal jugularvein thrombosis may occur in connection with a neoplasm, termed Trousseau's syndrome.This investigation reports a case of lung cancer associated with internal jugular vein thrombosis.

  14. Adrenal vein sampling in primary aldosteronism: towards a standardised protocol.

    Science.gov (United States)

    Monticone, Silvia; Viola, Andrea; Rossato, Denis; Veglio, Franco; Reincke, Martin; Gomez-Sanchez, Celso; Mulatero, Paolo

    2015-04-01

    Primary aldosteronism comprises subtypes that need different therapeutic strategies. Adrenal vein sampling is recognised by Endocrine Society guidelines as the only reliable way to correctly diagnose the subtype of primary aldosteronism. Unfortunately, despite being the gold-standard procedure, no standardised procedure exists either in terms of performance or interpretation criteria. In this Personal View, we address several questions that clinicians are presented with when considering adrenal vein sampling. For each of these questions we provide responses based on the available evidence, and opinions based on our experience. In particular, we discuss the most appropriate way to prepare the patient, whether adrenal vein sampling can be avoided for some subgroups of patients, the use of ACTH (1-24) during the procedure, the most appropriate criteria for interpretation of adrenal vein cannulation and lateralisation, the use of contralateral suppression, and strategies to improve success rates of adrenal vein sampling in centres with little experience. PMID:24831990

  15. Connexin43 Inhibition Prevents Human Vein Grafts Intimal Hyperplasia.

    Directory of Open Access Journals (Sweden)

    Alban Longchamp

    Full Text Available Venous bypass grafts often fail following arterial implantation due to excessive smooth muscle cells (VSMC proliferation and consequent intimal hyperplasia (IH. Intercellular communication mediated by Connexins (Cx regulates differentiation, growth and proliferation in various cell types. Microarray analysis of vein grafts in a model of bilateral rabbit jugular vein graft revealed Cx43 as an early upregulated gene. Additional experiments conducted using an ex-vivo human saphenous veins perfusion system (EVPS confirmed that Cx43 was rapidly increased in human veins subjected ex-vivo to arterial hemodynamics. Cx43 knock-down by RNA interference, or adenoviral-mediated overexpression, respectively inhibited or stimulated the proliferation of primary human VSMC in vitro. Furthermore, Cx blockade with carbenoxolone or the specific Cx43 inhibitory peptide 43gap26 prevented the burst in myointimal proliferation and IH formation in human saphenous veins. Our data demonstrated that Cx43 controls proliferation and the formation of IH after arterial engraftment.

  16. EXPERIMENTAL STUDY OF THE MORPHOLOGY OF CEREBRAL BRIDGING VEIN

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Objective. To investigate the morphological properties of pig cerebral bridging vein. Methods. The morphology and fibre arrangement of 15 cerebral bridging veins obtained from 7 Danish Yorkshire landrace pigs were observed. Results. There was a narrow region at the junction of the cerebral bridging veins and superior sagittal sinus termed “ outflow cuff segment". The diameter and length of outflow cuff segment were much smaller and the thickness was higher than those of the cerebral bridging veins (P0.05). Conclusions. There were differences in fibre arrangement and morphological properties between the outflow cuff segment and the cerebral bridging vein, just like a resistance valve, the outflow cuff segment may play an important role in stabilizing cerebral venous outflow and regulating intracranial pressure.

  17. Functional total anomalous pulmonary venous connection via levoatriocardinal vein.

    Science.gov (United States)

    Hayashi, Taiyu; Ozawa, Katsusuke; Sugibayashi, Rika; Wada, Seiji; Ono, Hiroshi

    2016-07-01

    We report a fetal case of double outlet right ventricle, mitral atresia, and intact atrial septum. Although the pulmonary veins were connected to the left atrium, pulmonary venous blood drained into the right superior vena cava via the stenotic levoatriocardinal vein (LACV), which resulted in a circulation resembling total anomalous pulmonary venous connection (TAPVC) with pulmonary venous obstruction. Since the pulmonary veins were connected to both the stenotic LACV and the "dead-end" left atrium, the pulmonary venous flow had a to-and-fro pattern along with atrial relaxation and contraction. Postnatal echocardiography and computed tomography confirmed the diagnosis of normally connected but anomalously draining pulmonary veins via the LACV. Surgical creation of an atrial septal defect on the day of birth successfully relieved pulmonary venous obstruction. Normally connected but anomalously draining pulmonary veins via the LACV should be considered for TAPVC differential diagnosis in fetuses with a left-side heart obstruction. PMID:27460400

  18. IVC agenesis: a rare cause of deep vein thrombosis.

    Science.gov (United States)

    Man, Louise; Hendricks, Nicholas; Maitland, Hillary

    2016-04-01

    We present the case of a healthy, young Caucasian female who presented to an outside hospital with phlegmasia cerulea dolens of both lower extremities. Computed tomography angiography revealed inferior vena cava (IVC) occlusion. She was initiated on heparin infusion and transferred to University of Virginia Medical Center. Our evaluation revealed aplasia of the IVC from the infrahepatic segment to the confluence of the common iliac veins and acute bilateral iliac vein thromboses. An extensive network of collateral veins was noted. These findings were consistent with IVC agenesis. She was not pregnant or using contraception. Primary thrombophilia workup was negative. She underwent bilateral iliac vein thrombolysis and was started on anticoagulation. While IVC agenesis is rare, it carries risk for development of thrombotic sequelae and bears consideration when evaluating young patients with unexplained deep vein thrombosis, especially if extensive and bilateral. PMID:26507132

  19. Application of magnetic resonance angiography in cerebral vein system

    International Nuclear Information System (INIS)

    Objective: To explore imaging technique of magnetic resonance in cerebral vein system and to evaluate the value of magnetic resonance veinography in displaying cerebral vein and diagnosing disease. Methods: The thrity-five persons experienced examinations of 2-dimension time of flight(2D TOF), 2-dimension phase contrast(2D PC) and then 3-dimension contrast-enhancement veinography(3D-CE MRV). The raw data treated with maxi intensitive projection. The images of veinography and disease changes were analysed as so to evaluate the dependability of the three methods in playing venous structions and disease changes. Results: All the diagnoses were proved by DSA or followed up. In 25 normal persons, 2D TOF and 2D PC of 10 persons showed abnormal in different type. But the 3D-CE MRV were normal.In 10 patients suffered from vein thrombosis,that all 2D-TOF MRV, 2D-PC MRV and 3D-CE MRV showed vein abnormality followed as: up radius sinus were no appeared in 2 cases, fined in 2 cases, local cannal of up radius sinus were narrowed in 1 cases. Right traversable sinus no appeared in 2 cases, fined in 2 cases, right sigmoid sinus no appeared in 1 cases. Additionally, in one patients, the left traversal sinus showed high signal as same as normal vein sinus in 2D TOF but of contrast medium was seen in 3D-CE-MRV. 3D-CE-MRV was dependable in describing structions of vein and displaying disease changes than 2D-TOF MRV and 2D-PC MRV. Conclusion: The techniques of vein imaging of 2D-TOF MRV and 2D-PC MRV combining with 3D-CE-MRV formed imaging method of cerebral vein system and it was dependable method for showing cerebral vein struction and diagnosing throb vein sinus thrombosis. (authors)

  20. Metastatic Melanoma to the Pancreas with a Thrombus in the Splenic Vein and Superior Mesenteric Vein: A Case Report

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Seong Sook; Kim, Jung Hoon; Kwon, Kui Hyang; Choi, Duek Lin; Park, Sung Tae; Kim, Yong Jae; Goo, Dong Erk; Hwang, Jung Hwa [Soonchunhyang University Hospital, Seoul (Korea, Republic of)

    2009-11-15

    Metastatic melanoma to the pancreas has been observed infrequently, and the presence of a thrombus in the splenic vein and superior mesenteric vein has rarely been seen for metastatic melanoma. We present the CT and MRI findings of a case of metastatic melanoma to the pancreas, which presented with diffuse multiple pancreatic metastatic nodules and a venous thrombus.

  1. Metastatic Melanoma to the Pancreas with a Thrombus in the Splenic Vein and Superior Mesenteric Vein: A Case Report

    International Nuclear Information System (INIS)

    Metastatic melanoma to the pancreas has been observed infrequently, and the presence of a thrombus in the splenic vein and superior mesenteric vein has rarely been seen for metastatic melanoma. We present the CT and MRI findings of a case of metastatic melanoma to the pancreas, which presented with diffuse multiple pancreatic metastatic nodules and a venous thrombus

  2. Factors Associated with Recurrence of Varicose Veins after Thermal Ablation: Results of The Recurrent Veins after Thermal Ablation Study

    Directory of Open Access Journals (Sweden)

    R. G. Bush

    2014-01-01

    Full Text Available Background. The goal of this retrospective cohort study (REVATA was to determine the site, source, and contributory factors of varicose vein recurrence after radiofrequency (RF and laser ablation. Methods. Seven centers enrolled patients into the study over a 1-year period. All patients underwent previous thermal ablation of the great saphenous vein (GSV, small saphenous vein (SSV, or anterior accessory great saphenous vein (AAGSV. From a specific designed study tool, the etiology of recurrence was identified. Results. 2,380 patients were evaluated during this time frame. A total of 164 patients had varicose vein recurrence at a median of 3 years. GSV ablation was the initial treatment in 159 patients (RF: 33, laser: 126, 52 of these patients had either SSV or AAGSV ablation concurrently. Total or partial GSV recanalization occurred in 47 patients. New AAGSV reflux occurred in 40 patients, and new SSV reflux occurred in 24 patients. Perforator pathology was present in 64% of patients. Conclusion. Recurrence of varicose veins occurred at a median of 3 years after procedure. The four most important factors associated with recurrent veins included perforating veins, recanalized GSV, new AAGSV reflux, and new SSV reflux in decreasing frequency. Patients who underwent RF treatment had a statistically higher rate of recanalization than those treated with laser.

  3. Ipomoviruses: Squash vein yellowing virus, Cucumber vein yellowing virus, Cassava brown streak virus, and Ugandan cassava brown streak virus

    Science.gov (United States)

    Ipomoviruses including Squash vein yellowing virus, Cucumber vein yellowing virus and Cassava brown streak virus are currently causing significant economic impact on crop production in several regions of the world. Only recently have results of detailed characterization of their whitefly transmissi...

  4. Associations between flow in paratibial perforating veins and great saphenous vein patterns of reflux

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Engelhorn

    2015-06-01

    Full Text Available Perforating veins contribute to chronic venous valvular insufficiency (CVVI, subset of CVI of lower extremities (LE. We investigated the role of medial, proximal calf paratibial perforating veins (PTPV. Women with PTPV reflux, diameter ≥3 mm, or tortuosity were selected among 2199 LE mappings. Duplex ultrasonography (US was performed standing. Reflux >0.5 s was abnormal. PTPV conditions were related to great saphenous vein (GSV patterns of reflux. US of 442 LE of 379 women were analyzed, all being Clinical-Etiology-Anatomy-Pathophysiology (CEAP classification C1, C2, and/or having intermittent, conditional swelling. Etiology was primary. Pathophysiology was reflux, not thrombosis or obstruction. Most PTPV drained (n=281, 64% of 442 or 13% of 2199, or were source (n=73, 17%/442, 3%/2199 of GSV reflux; 49 (11%/442, 2%/2199 had reflux not associated with GSV; 39 (9%/442, 2%/2199 did not have reflux. PTPV, when significative for CVVI, primarily drained-GSV reflux. PTPV was linked to reflux in 1 of 5 and was a major source of reflux in 1 of 20 legs. Detailed US of PTPV insured over 80% accuracy in CVVI mapping.

  5. Aneurysmal dilatation of persistent vitelline vein with thrombus in a neonate

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Kun Woo; Sung, Deuk Jae; Park, Beom Jin; Kim, Min Ju; Cho, Sung Bum [Korea University College of Medicine, Department of Radiology, Anam Hospital, Seoul (Korea, Republic of)

    2014-07-15

    The paired vitelline veins selectively involute and form a part of the portal vein during embryonic development. The presence of a persistent vitelline vein segment after birth is very rare and can be confused with anomalies of the portal and umbilical veins. We present sonographic, CT and MRI findings of aneurysmal dilatation of a persistent vitelline vein with thrombus in a neonate; this case was first misdiagnosed as an umbilical vein varix by prenatal US. MRI was used to identify the persistent vitelline vein segment and the remnant umbilical vein segment. (orig.)

  6. The study of multi-detector CT on the grouping and measuring of the hepatic veins

    International Nuclear Information System (INIS)

    Objective: To study the three-dimensional topography of the hepatic vein (HV), the inferior vena cava(IVC) and the inferior right hepatic vein(IRHV) in the retrohepatic and pre-IVC tunnel in human beings, and to provide an anatomic reference for liver surgery. Methods: One hundred and ten volunteers underwent CT scanning at 60 to 75 s after injection of contrast medium, and their HV, IVC and IRHV were reconstructed into MPR and 3D-MIP images. The hepatic veins were grouped according to the way by which the hepatic vein enters IVC. The angle between the right hepatic vein and the middle hepatic vein or the trunk of hepatic vein was measured, and the width from right hepatic vein to middle hepatic vein or to the trunk of hepatic vein on IVC was recorded. The frequency of IRHV was observed, and the length of the tunnel was measured. Results: Among the 110 volunteers, there were 6 cases (5.45%) with three hepatic veins respectively entering IVC, 98 cases (89.10%) with right hepatic vein and a common trunk of the middle hepatic vein and the left hepatic vein entering IVC, and 6 cases (5.45%) with left hepatic vein and a common trunk of the right hepatic vein and the middle hepatic vein entering IVC. The mean value of the angles between the right hepatic vein and the middle hepatic vein or the mink of hepatic vein was (55 ± 18) degree. The width from the right hepatic vein to the middle hepatic vein or to the trunk of hepatic vein was (21 ± 7)mm. The IRHV was observed in 30 cases(27.27%). The mean value of the tunnel length was (53 ± 11) mm. Conclusion: The parameters of the retrohepatic and pre-IVC tunnel in human beings can be measured accurately by the imaging of MPR, which can provide an anatomic reference for the liver surgery. (authors)

  7. Palm Vein Verification Using Multiple Features and Locality Preserving Projections

    Directory of Open Access Journals (Sweden)

    Ali Mohsin Al-juboori

    2014-01-01

    Full Text Available Biometrics is defined as identifying people by their physiological characteristic, such as iris pattern, fingerprint, and face, or by some aspects of their behavior, such as voice, signature, and gesture. Considerable attention has been drawn on these issues during the last several decades. And many biometric systems for commercial applications have been successfully developed. Recently, the vein pattern biometric becomes increasingly attractive for its uniqueness, stability, and noninvasiveness. A vein pattern is the physical distribution structure of the blood vessels underneath a person’s skin. The palm vein pattern is very ganglion and it shows a huge number of vessels. The attitude of the palm vein vessels stays in the same location for the whole life and its pattern is definitely unique. In our work, the matching filter method is proposed for the palm vein image enhancement. New palm vein features extraction methods, global feature extracted based on wavelet coefficients and locality preserving projections (WLPP, and local feature based on local binary pattern variance and locality preserving projections (LBPV_LPP have been proposed. Finally, the nearest neighbour matching method has been proposed that verified the test palm vein images. The experimental result shows that the EER to the proposed method is 0.1378%.

  8. Renal Vein Reconstruction for Harvesting Injury in Kidney Transplantation

    Directory of Open Access Journals (Sweden)

    Birkan Bozkurt

    2014-03-01

    Full Text Available Kidney transplantation is the best treatment choice in the end-stage renal disease. In the renal transplantation, renal vein damage or shortness which occurs during cadaveric or living donor nephrectomy causes technical difficulties for surgeons. The lack of the donors already especially cadaveric, the acquirement of the graft, gets very much importance. In this report, it is aimed to share the clinical experiment by which it seen, how anastomosis can become appropriate by using the renal vein which is damaged in the way that anastomosis cannot be done anyway by using cadaveric vena cava graft. The renal vein brought to length for anostomosis which is repaired by using cadaveric vena cava graft, is anastomosed successfully by becoming an end-to-side of the external iliac vein of the recipient. Vascular anastomoses are applied easily in technique. The time of the warm ischemia was under 2 hours and the kidney was functional in the post-operative period. Renal vein trombosis was not observed. The renal vein damage occured during cadaveric or living donor nephrectomy, can be repaired by some methods. In the kidneys in which vein requirement is done, the success rates are rather high although acute tubular necrosis and delayed function can be seen more.

  9. Leaf Vein Extraction Based on Gray-scale Morphology

    Directory of Open Access Journals (Sweden)

    Xiaodong Zheng

    2010-12-01

    Full Text Available Leaf features play an important role in plant species identification and plant taxonomy. The type of the leaf vein is an important morphological feature of the leaf in botany. Leaf vein should be extracted from the leaf in the image before discriminating its type. In this paper a new method of leaf vein extraction has been proposed based on gray-scale morphology. Firstly, the color image of the plant leaf is transformed to the gray image according to the hue and intensity information. Secondly, the gray-scale morphology processing is applied to the image to eliminate the color overlap in the whole leaf vein and the whole background. Thirdly, the linear intensity adjustment is adopted to enlarge the gray value difference between the leaf vein and its background. Fourthly, calculate a threshold with OSTU method to segment the leaf vein from its background. Finally, the leaf vein can be got after some processing on details. Experiments have been conducted with several images. The results show the effectiveness of the method. The idea of the method is also applicable to other linear objects extraction.

  10. Femoral venous reflux abolished by greater saphenous vein stripping.

    Science.gov (United States)

    Walsh, J C; Bergan, J J; Beeman, S; Comer, T P

    1994-11-01

    Preoperative venous duplex scanning has revealed unexpected deep venous incompetence in patients with apparently only varicose veins. Acting on the hypothesis that the deep vein reflux was secondary to deep vein dilation caused by reflux volume, the following was done. Between July 1990 and April 1993, 29 limbs in 21 patients (16 females) were examined by color-flow duplex imaging to determine valve closure by the method of van Bemmelen. Instrumentation included high-resolution ATL-9 venous interrogation using a pneumatic cuff deflation stimulus of reflux in the standing, nonweight-bearing limb. All limbs showed greater saphenous vein reflux. Twenty-nine showed superficial femoral vein reflux and of these three showed popliteal vein reflux. Duplex testing was performed by a certified vascular technologist whose interpretation was blinded as to the results of clinical examination and grading of the severity of venous insufficiency. Surgery was performed on an outpatient basis under general anesthesia using groin-to-knee removal of the greater saphenous vein by the vein inversion technique of Van Der Strict. Stab avulsion of varicose tributary veins was accomplished during the same period of anesthesia. In 27 of 29 limbs with preoperative femoral reflux, that reflux was abolished by greater saphenous stripping. In patients with popliteal reflux both femoral and popliteal reflux was abolished. Improvement of deep venous hemodynamics by ablation of superficial reflux supports the reflux circuit theory of venous overload. Furthermore, preoperative evaluation of venous hemodynamics by duplex scanning appears to provide useful pre- and postoperative information regarding venous insufficiency in individual patients. PMID:7865395

  11. Retinal vein occlusion and the prevalence of lipoprotein abnormalities.

    OpenAIRE

    Dodson, P. M.; Galton, D J; Hamilton, A M; Blach, R K

    1982-01-01

    Ninety-nine patients with retinal vein occlusion (40 with central, 59 with branch vein occlusion) were investigated for the prevalence of associated diseases for comparison with an age-matched control group. There was a significantly increased prevalence of hyperlipidaemia (p less than 0.001) and hypercholesterolaemia (p less than 0.001) in the group with branch retinal vein occlusion and of hyperlipidaemia (p less than 0.001) and hypercholesterolaemia (p less than 0.02) in the group with cen...

  12. A phyllosilicate-sulfide vein in Kaidun. [Abstract only

    Science.gov (United States)

    Ivanov, A. V.; Zolensky, M. E.; Brandstatter, F.; Kurat, G.; Kononkova, N. N.

    1994-01-01

    A fragment of a carbonaceous chondrite (#53.12, maximal dimension about 2 mm) containing a phyllosilicate-sulfide vein was found during an inspection of small pieces of the Kaidun meteorite. Phyllosilicate veins are apparently rare in carbonaceous chondrites and have so far only been reported from the Y82162 CI chondrite. In hand sample the vein was visible on two perpendicular faces. The polished section prepared from one side displays a complex structure. A single vein, 150 microns in width, bifurcates, and each branch narrows toward a large rounded object (RO). The section contains abundant ROs, most of them less than or equal to 100 microns in diameter. The vein has sharp contacts to the surrounding matrix, whereas the RO contacts are diffuse. The phyllosilicate in the main vein has a massive texture along the contact, which becomes platy toward the vein center where the crystals protrude into an open space. The texture of the largest RO resembles that of a barred olivine (BO) chondrule. Some of the smaller ROs also texturally resemble chondrules. The BO chondrule contains rounded sulfide-silicate objects and small metal grains covered by oxides. Phyllosilicates of the main vein consist mainly of serpentine. The phyllosilicate near the contact with the matrix has low contents of minor elements and a high Mg/Fe ratio. The composition changes in a regular manner toward the center: Al, Na, Ca, Ni, and S increase, indicating increasing amounts of sulfates admixed. The phyllosilicate vein could only have formed after a substantial rock was formed. Mechanical stress probably opened a crack that was subsequently filled by phyllosilicate, pyrrhotite, and finally by a (Fe,Mg)-sulfate. The source of the matter mobilized to form the vein could have been within the rock itself or outside. No compositional or mineralogical zoning is apparent at the vein-rock contacts. The nature of the transporting agent (liquid H2O or vapor) must also remain an enigma. M. Zolensky has

  13. Nitroprusside modulates pulmonary vein arrhythmogenic activity

    Directory of Open Access Journals (Sweden)

    Chen Yao-Chang

    2010-03-01

    Full Text Available Abstract Background Pulmonary veins (PVs are the most important sources of ectopic beats with the initiation of paroxysmal atrial fibrillation, or the foci of ectopic atrial tachycardia and focal atrial fibrillation. Elimination of nitric oxide (NO enhances cardiac triggered activity, and NO can decrease PV arrhythmogensis through mechano-electrical feedback. However, it is not clear whether NO may have direct electrophysiological effects on PV cardiomyocytes. This study is aimed to study the effects of nitroprusside (NO donor, on the ionic currents and arrhythmogenic activity of single cardiomyocytes from the PVs. Methods Single PV cardiomyocytes were isolated from the canine PVs. The action potential and ionic currents were investigated in isolated single canine PV cardiomyocytes before and after sodium nitroprusside (80 μM, using the whole-cell patch clamp technique. Results Nitroprusside decreased PV cardiomyocytes spontaneous beating rates from 1.7 ± 0.3 Hz to 0.5 ± 0.4 Hz in 9 cells (P Conclusion Nitroprusside regulates the electrical activity of PV cardiomyocytes, which suggests that NO may play a role in PV arrhythmogenesis.

  14. Electrophysiological evaluation of pulmonary vein isolation

    Directory of Open Access Journals (Sweden)

    Simon Kircher; Philipp Sommer

    2013-10-01

    Full Text Available Since the pulmonary veins (PVs had been identified as a major source of AF triggers, ablation strategies targeting the PVs have evolved from focal ablation inside the PVs to wide area circumferential PV isolation (PVI which at this juncture is the standard approach. Despite the widespread popularity of PVI a universal definition is lacking. Whilst “entrance block” is a generally accepted endpoint for PVI, the role of “exit block” has yet to be determined. Unexcitability of the circular ablation line has been introduced as a promising additional endpoint for PVI and was associated with an improved clinical outcome in a randomized trial. Correct interpretation of PV electrograms during an ablation procedure is critical in terms of efficacy and safety. A variety of electrophysiological techniques help to correctly differentiate components of complex PV electrograms. Resumption of PV conduction after initially successful PVI leading to AF recurrence remains a major problem and confirmation of bi-directional conduction block does not exclude reversible tissue damage along the ablation line. Prolongation of post-PVI monitoring and application of provocative procedures such as the administration of adenosine after initial PVI to unmask dormant PV conduction may improve clinical outcome although there is lack of valid data supporting these strategies.

  15. Clinical trials in branch retinal vein occlusion

    Directory of Open Access Journals (Sweden)

    Tandava Krishnan Panakanti

    2016-01-01

    Full Text Available Branch retinal vein occlusion (BRVO is the second most common retinal vascular disorder. The management of macular edema has changed considerably over time. The laser is considered the gold standard treatment for over two decades. However, visual recovery with laser is usually slow and incomplete. The advent of intravitreal agents, specifically anti-vascular endothelial growth factors (VEGF have heralded a new era which promises rapid recovery of vision and quality of vision. Randomized clinical trials have reported optimal results with anti-VEGF agents (ranibizumab, bevacizumab, and aflibercept compared to laser therapy or steroids. However, nearly 50% of the patients require repeat intravitreal anti-VEGF therapy up to 4 years after initiating therapy to sustain the visual gains. The adverse events (systemic and ocular of these agents are minimal. Monotherapy with anti-VEGF agents have been found to provide better results than any combination with laser. This review article summarizes evidence from randomized controlled trials evaluating treatment options for the treatment of macular edema secondary to BRVO with a special focus on anti-VEGF therapy.

  16. Creation of an Arterio-Venous Fistula Between the Brachial Artery and Basilic Vein with a Saphenous Vein Graft Interposition

    Directory of Open Access Journals (Sweden)

    Hakan KARA

    2015-09-01

    Full Text Available Arteriovenous fistulas for hemodialysis are usually open in the upper extremity. For patients with thrombosed arteriovenous fistulas in this area, alternative fistula access routes are needed. AVF creation with a saphenous vein graft is an alternative hemodialysis access method in the patient who has lost the chance of fistula creation with his native vessels.The aim of this case report is to discuss AV fistula management with a saphenous vein graft between the brachial artery and basilic vein in a hemodialysisdependent patient. In this patient previous fistulas were thrombosed and the native vessels in the upper extremity vessels were not suitable for a new AV fistula creation.

  17. Circumaortic Left Renal Vein-A Rare Case Report

    Science.gov (United States)

    Panagar, Anupama Doddappaiah; Subhash, R. Lakshmi Prabha; Suresh, B.S.; Nagaraj, D.N.

    2014-01-01

    During routine dissection which was carried out for the medical students, a circumaortic left renal vein draining into inferior vena cava was observed. There were 2 renal veins through which the left kidney drained into the inferior vena cava, of which the larger one ran ventral to aorta and the other smaller one ran posterior to aorta and received lumbar veins before opening into inferior vena cava. This is a relatively rare condition which can result in left renal hypertension (LRVH) syndrome which is otherwise called as anterior and posterior nutcracker syndromes. This venous anomaly results from the errors of embryological development. It is of clinical significance, mainly during retroperitoneal surgeries and intra caval interventions. It is also important in conditions which warrant extensive venous dissections, venous reconstructions as in transplantations and invasion of veins by cancerous tissue, resulting in life threatening haemorrhage. PMID:24783096

  18. Magnetic resonance angiography (MRA) of the abdominal veins

    International Nuclear Information System (INIS)

    On the basis of the time-of-flight effect in 18 normal volunteers and 119 patients with different diseases of the abdominal veins (inferior vena cava, portosplenic systems, renal/hepatic/iliac veins) magnetic resonanced (MR) angiograms were compared with the DSA, CT and US results. The MR technique included a series of 2D gradient-echo (Flash) images obtained which the patients held their breath and projection angiograms (PA) (MIP algorithm). PA of the inferior vena cava and renal veins had a sensitivity of 90% and a specificity of 88.8%. The results demonstrate that in all cases diseases of the large veins could be detected using all the MR information available. It is suggested that this method is so far not satisfactory in the evaluation of small vessels and slow intravascular flow conditions. (orig.)

  19. HIV associated deep vein thrombosis: Case reports from Jos, Nigeria

    Directory of Open Access Journals (Sweden)

    C A Daniyam

    2011-01-01

    Full Text Available Deep vein thrombosis (DVT has been reported to be 2-10 times commoner in HIV infected patients than in the general population. We report two cases of extensive unilateral deep vein thrombosis involving the lower limb in HIV infected patients on highly active antiretroviral therapy (HAART. Doppler ultrasound in the two patients revealed evidence of venous thrombosis from the femoral vein down to the posterior tibial veins. None of the patients had a history of acquired risk factors for DVT. Both patients responded well to anti-coagulants. A high index of suspicion may therefore be required to make the diagnosis and institute adequate management for this condition which has potentially life threatening consequences.

  20. Diagnosis, investigation, and management of deep vein thrombosis

    OpenAIRE

    Tovey, Clive; Wyatt, Suzanne

    2003-01-01

    Deep vein thrombosis is an important cause of morbidity and mortality worldwide, and its clinical diagnosis is unreliable. This article explains current screening and diagnostic methods as well as treatment

  1. Dorsal Hand Vein Biometry by Independent Component Analysis

    Directory of Open Access Journals (Sweden)

    V.H.Yadav

    2012-07-01

    Full Text Available Biometric authentication provides a high security and reliable approach to be used in security access system. Personal identification based on hand vein patterns is a newly developed recent year. The pattern of blood veins in the hand is unique to every individual, even among identical twins, and it do notchange over time. These properties of uniqueness, stability and strong immunity to forgery of the vein patterns make it a potentially good biometric trait which offers greater security and reliable features for personal identification. In this study, we have used the BOSPHORUS hand vein database which has been taken under a source of NIR infrared radiation. For feature extraction we applied appearance based method ICA which produces independent components. To control over the number of independent component we preprocessed data by PCA before applying ICA, and gives good experimental results.

  2. Why Do Some Pregnant Women Get Varicose Veins?

    Science.gov (United States)

    ... found in the legs, genital area, and rectum ( hemorrhoids are just a type of varicose veins). Varicose ... Recovering From Delivery How Do You Treat Pregnancy Hemorrhoids and Constipation? Medical Care During Pregnancy 10 Things ...

  3. Plantar vein thrombosis: a rare cause of plantar foot pain

    Energy Technology Data Exchange (ETDEWEB)

    Siegal, Daniel S.; Wu, Jim S.; Brennan, Darren D.; Hochman, Mary G. [Beth Israel Deaconess Medical Center, Department of Radiology, Boston, MA (United States); Challies, Tracy [Beth Israel Deaconess Medical Center, Department of Pathology, Boston, MA (United States)

    2008-03-15

    Plantar vein thrombosis is a rare condition, with only a handful of cases reported in the literature. The cause is unknown; however, the disease has been attributed to prior surgery, trauma, and paraneoplastic conditions. We present a case of a 32-year-old female runner with plantar vein thrombosis diagnosed on contrast-enhanced MRI and confirmed on ultrasound. The symptoms resolved with conservative treatment and evaluation revealed the presence of a prothrombin gene mutation and use of oral contraceptive pills. To our knowledge, this is the first case of plantar vein thrombosis diagnosed initially by MRI. Moreover, this case suggests that plantar vein thrombosis should be considered in patients with hypercoagulable states and plantar foot pain. (orig.)

  4. Postpartum Ovarian Vein Thrombosis: Two Cases and Review of Literature

    Directory of Open Access Journals (Sweden)

    Amos A. Akinbiyi

    2009-01-01

    Conclusion. Ovarian vein thrombosis is rare, but could present late, and difficult to diagnose, hence, should be considered as a differential diagnosis in a postpartum woman with fever and tender pelvic mass.

  5. Normal anatomical variation of the intrahepatic portal vein in Korean

    Energy Technology Data Exchange (ETDEWEB)

    Oh, Jae Cheon; Seo, Heung Suk; Kim, Yong Soo; Rhim, Hyun Chul; Koh, Byung Hee; Cho, On Koo; Moon, Won Jin; Lee, Tae Hee [Hanyang Univ., Seoul (Korea, Republic of). Coll. of Medicine

    1997-12-01

    The purpose of this study is to determine the prevalence of variations in the intrahepatic portions of portal veins, as visualized by arterial portograms, and to examine the surgical implications of these findings in Koreans. Five hundred and nineteen arterial portograms of 519 patients with no evidence of vascular tumor invasion or distortion were retrospectively reviewed. In all patients, the main, right, right anterior, right posterior and left portal vein were visualized. On arterial portogram, variations in the intrahepatic portions of the portal veins are frequently seen. The recognition of such variations is important in the preoperative evaluation of patients with hepatic tumors, since the variations may have implications for tumor resection, for the localization of tumor thrombi and in interventional radiologic procedures involving the portal vein. (author).13 refs., 1 tab., 4 figs.

  6. Portal vein cannulation: An uncommon complication of endoscopic retrograde cholangiopancreatography

    Institute of Scientific and Technical Information of China (English)

    Evangelos Kalaitzakis; Nicholas Stern; Richard Sturgess

    2011-01-01

    Portal vein cannulation is a rare complication of endoscopic retrograde cholangiopancreatography (ERCP). It has been reported that it usually occurs after endoscopic sphincterotomy, whereas in cases without prior sphincterotomy, the presence of portobiliary fistulas has been shown. Here, we present a case in which cannulation of the portal vein occurred despite careful wire-guided cannulation and the absence of sphincterotomy. Although fatal cases of cerebral and pulmonary air and/or bile embolism have been reported in patients with combined portal and hepatic vein trauma after ERCP and sphincterotomy, isolated portal vein cannulation, as in the current case, does not usually result in mortality or serious morbidity. However, awareness of this rare complication is important so that no further intervention is performed.

  7. BREAST TUMOUR PRESENTING AS RECURRENT DEEP VEIN THROMBOSIS

    OpenAIRE

    2006-01-01

    Deep vein thrombosis development during the course of treatment of breast carcinoma has been well described, but carcinoma breast presenting with DVT for the first time is highly unusual. We present the case of a 45 year old women with recurrent deep vein thrombosis of left lower limb. During the second episode she was found to have infiltrating ductal carcinoma of the right breast with axillary lymph node metastasis. To our knowledge there have been only one literature report of breast carci...

  8. Systemic thrombolysis in the upper extremity deep vein thrombosis

    OpenAIRE

    Sadeghi, Roxana; Safi, Morteza

    2011-01-01

    Almost 4% of all patients with venous thrombosis have upper extremity deep vein thrombosis (UEDVT) and the incidence of UEDVT increases over time. The frequency of post-thrombotic syndrome (PTS) after UEDVT is not low and upper extremity PTS is a potentially major morbidity that adversely affects quality of life, particularly if the dominant arm is involved. We discuss briefly the role of thrombolytic therapy in the treatment of upper extremity deep vein thrombosis and also the role of system...

  9. ENDOLUMINAL TREATMENT OF THE VARICOSE VEINS OF THE LOWER LIMB

    OpenAIRE

    C. Lupascu; Gabriela Canschi

    2005-01-01

    Endoluminal surgery of the varicose veins it's not a recent technique but the new procedures using radiofrequency and laser considerably relaunced its interest. The thermic energy that this technique gives to the venous wall induces a fibrous retraction of the vein and its occlusion. There are detailed here the material needed, methods but also the difficulties, possible incidents and accidents during them. The indications of these endoluminal interventions are still a disputed subject. The e...

  10. Deep vein thrombosis and pulmonary embolism in the Chinese population

    OpenAIRE

    Nandi, PL; Li, WS; Leung, R.; Chan, HT; Chan, J

    1998-01-01

    Deep vein thrombosis and pulmonary embolism is a well-recognised major health problem in the West. There is a deep-rooted belief among clinicians that deep vein thrombosis is rare in Asians, particularly in the Chinese population. However, it appears that the incidence of venous thrombosis and pulmonary embolism is increasing in Chinese patients. Prophylaxis reduces the incidence of venous thrombosis by 66% and of pulmonary embolism by 50%Ը? prophylaxis should therefore be considered for Chin...

  11. Branch retinal vein occlusion associated with quetiapine fumarate

    Directory of Open Access Journals (Sweden)

    Siang Lim

    2011-08-01

    Full Text Available Abstract Background To report a case of branch retinal vein occlusion in a young adult with bipolar mood disorder treated with quetiapine fumarate. Case Presentation A 29 years old gentleman who was taking quetiapine fumarate for 3 years for bipolar mood disorder, presented with sudden vision loss. He was found to have a superior temporal branch retinal vein occlusion associated with hypercholesterolemia. Conclusion Atypical antipsychotic drugs have metabolic side effects which require regular monitoring and prompt treatment.

  12. Sciatica caused by a dilated epidural vein: MR findings

    Energy Technology Data Exchange (ETDEWEB)

    Demaerel, P.; Petre, C.; Wilms, G. [Dept. of Radiology, Catholic University of Leuven (Belgium); Plets, C. [Dept. of Neurosurgery, Catholic University of Leuven (Belgium)

    1999-02-01

    We report the MR imaging findings in a 41-year-old woman presenting with sudden low back pain and sciatica. At surgery a dilated epidural vein was found compressing the nerve root. The MR findings may suggest the diagnosis. Magnetic resonance imaging of a dilated epidural vein or varix causing sciatica has not been reported until now. (orig.) (orig.) With 1 fig., 4 refs.

  13. Immunocytochemical features of obstructed saphenous vein coronary artery bypass grafts.

    OpenAIRE

    Brody, J I; Pickering, N J; Fink, G B

    1989-01-01

    The peroxidase-immunoperoxidase immunocytochemical method was used on 27 saphenous vein coronary artery bypass grafts, which had been resected because of recurrent angina, to identify in situ cellular and humoral elements possibly associated with graft occlusion. Immunostaining was performed on paraffin wax embedded control saphenous vein and graft sections incubated directly with primary antibodies against von Willebrand antigen (vWFAg), fibronectin, fibrinogen, leucocyte common antigen (LCA...

  14. An unusual intraventricular interthalamic vein: two anatomical case reports.

    Science.gov (United States)

    Capel, Cyrille; Peltier, Johann; Foulon, Pascal; Page, Cyril; Havet, Eric; Le Gars, Daniel

    2012-12-01

    Neurosurgeons use ventricular veins during an endoscopic third ventriculocisternostomy as landmark to progress in ventricles. In the current literature, there is lack of detailed intraventricular venous anatomy. Majority of those papers treats Monro's foramen venous variations. There are no data of third ventricle venous anatomy and variations in the literature. We reported two cases of unusual interthalamic vein that we need to spare during endoscopy. PMID:22543760

  15. Hepatic portal vein gas as a complication of cryotherapy

    OpenAIRE

    Alfredson, M.J.; Brooks, A J; Talbot, M.L.; Morris, D. L.

    2005-01-01

    Background. Hepatic portal vein gas (HPVG) is a radiological finding normally associated with life-threatening conditions such as mesenteric ischaemia and necrotising enterocolitis in infants. Its presence has previously been associated with a high mortality rate. As a result of more sensitive imaging modalities the spectrum of conditions for which portal vein gas is detected has broadened. We present a patient who developed HPVG as a complication of cryotherapy. The association between porta...

  16. DEM modeling of fracture propagation in veined rock

    Science.gov (United States)

    Virgo, S.; Abe, S.; Urai, J. L.

    2012-04-01

    One fundamental aspect of crack seal veins is that an existing vein can act as a heterogeneity in the rock which controls the localization of successive fracturing at unchanged mean stress orientations. Observations from crack-seal vein systems suggest that existing veins fundamentally influence the fracture behavior of a rock even in cases where the orientation of the stress field is highly incompatible with the orientation of the vein. We used a series of 3D Discrete Element Simulations to systematically investigate the influence of existing veins with varying orientation and mechanical properties on an approaching fracture. The models consist of a tabular heterogeneity within a bonded particle volume fractured under uniaxial tension. The parameters varied in the study are the orientation of the heterogeneity relative to the direction of uniaxial extension and therefore relative to the orientation of the favorable fracture plane as well as the fracture strength ratio between the matrix material, the vein material and the interface between vein and matrix material. The elastic parameters (e.g. Young's modulus) are kept homogeneous throughout the model. Thereby it is ensured that the results are not altered by stress field perturbation induced by stiffness contrasts. The model materials used were carefully tested and calibrated to ensure comparability with natural examples in terms of their fracture-mechanical properties. The simulations were repeated for several random particle packings to eliminate the effect of heterogeneities in the packing on the results. The results show a strong influence of the tabular heterogeneity on the fracture propagation for all orientations and at cohesion ratios within the range of natural systems. Besides curving and deflection of the fracture path associated with changes in fracture mode, bifurcation of fractures as well as arrest of propagation and nucleation of new fractures can be observed.

  17. A case of aneurysm of the vein of Galen.

    OpenAIRE

    Sung, K. B.; Chang, D I; Kim, J. H.; Kim, M H; Hahm, C. K.; Jeon, S. C.

    1987-01-01

    Aneurysm of the vein of Galen is a very rare disease. The authors present a case of secondary aneurysm of the vein of Galen which was confirmed by characteristic clinical symptoms, brain CT and angiographic findings. The patient was a 14-year-old right handed girl with intermittent headache, nausea, vomiting, dysphasia and gait disturbance. Neurologic examination revealed dysarthria, nasal voice, blurring of both margins of optic discs, truncal ataxia and dysdiadochokinesia. Sensory function ...

  18. A Randomized Trial Comparing Treatments for Varicose Veins

    OpenAIRE

    Brittenden, J.; Cotton, S. C.; Elders, A.; Ramsay, C. R.; Norrie, J.; Burr, J.M.; Campbell, B.; Bachoo, P.; Chetter, I.; Gough, M.; Earnshaw, J; Lees, T; Scott, J.; BAKER, S.; Francis, J.

    2014-01-01

    BACKGROUND: Ultrasound-guided foam sclerotherapy and endovenous laser ablation are widely used alternatives to surgery for the treatment of varicose veins, but their comparative effectiveness and safety remain uncertain. METHODS: In a randomized trial involving 798 participants with primary varicose veins at 11 centers in the United Kingdom, we compared the outcomes of foam, laser, and surgical treatments. Primary outcomes at 6 months were disease-specific quality of life and generic qual...

  19. Treatment and Quality of Life of Patients with Varicose Veins

    OpenAIRE

    Biemans, Anke

    2013-01-01

    textabstractVaricose veins are common and have a substantial impact on patients’ quality of life. Multiple good treatment options are currently available. In this thesis we describe the indications, procedures, safety, efficacy and recurrence profiles of the most frequently performed treatments for varicose veins. Health related quality of life questionnaires are important instruments to measure impact of disease on patients and can be used to evaluate treatment effects. We translate and vali...

  20. Veins and Lymphatics is taking its first steps

    OpenAIRE

    Stefano Ricci

    2012-01-01

    Veins represent an important field of medicine. They are frequently involved in several diseases with a very wide range of severity. At one end of the spectrum, we have thrombosis and post-thrombotic syndrome, while at the other we have telangectasias, and a vast number of other conditions lie between these two extremes. Varicose veins are not always severe, but they affect an enormous number of people, with a consequent social and economic burden to society. Lymphology is also an important s...

  1. Aneurysmal Malformation of Galen Vein: A Case Report

    OpenAIRE

    A. Alizadeh; Sh. Yousefzadeh

    2008-01-01

    Introduction: Vein of Galen aneurismal malformation (VGAM) is a rare congenital vascular malformation Characterized by shunting of arterial flow into en-larged cerebral vein, dorsal to the tectum that consti-tute approximately 1% of all intracranial vascular le-sions, however they represent 30% of vascular mal-formations in the pediatric groups."nCase Presentation: A Ten-month old male infant pre-sented to the pediatric physician by increase in the head circumference. There were no sympt...

  2. An unusual presentation of postpartum ovarian vein thrombosis

    International Nuclear Information System (INIS)

    Ovarian vein thrombosis is a rare but potentially serious complication following childbirth. The majority of patients present during the first week postpartum, with fever and right lower quadrant abdominal pain. We report an unusual case of postpartum ovarian vein thrombosis who presented with fever, low backache, and painful thighs. A high index of suspicion is crucial to diagnose and treat this condition in order to avoid serious consequences. (author)

  3. Calcification of an aneurysm of the vein of Galen

    International Nuclear Information System (INIS)

    A 3 1/2 month old boy was diagnosed as having hydrocephalus secondary to an aneurysm of the vein of Galen. Cerebral angiography 2 1/2 years later showed the aneurysm to be completely occluded and CT demonstrated it to be thrombosed and completely calcified. Complete calcification of an aneurysm of the vein of Galen has only been described on two previous occasions and never in a child this young. (orig.)

  4. The mechanics of intersecting echelon veins and pressure solution seams in limestone

    Science.gov (United States)

    Seyum, Solomon; Pollard, David D.

    2016-08-01

    Many studies that describe the formation of echelon vein arrays relate the causative stresses implicitly to the deformation, reliant on simple shear kinematics, such that the vein-to-array angle and the array width are the primary physical quantities. In contrast, we identify twelve physical quantities to describe echelon veins in two dimensions, including coeval, vein-intersecting, pressure solution seams. A finite element method is used to reproduce vein shapes in linear elastic and elastic-perfectly plastic model limestone. Model vein geometries are designed using values within the range of geometries measured from echelon veins at Raplee Anticline and Comb Monocline, Utah. Four physical quantities are significant for describing echelon vein shapes: vein spacing, vein-array angle, limestone elastic stiffness, and closing of orthogonal pressure solution seams. Pressure solution seam closing influences the mechanical interaction between adjacent veins, and for a range of conditions, causes a nearly linear vein opening distribution (triangular shapes) and encourages straight vein propagation, both of which approximate field measurements. Model results show that small spacing of veins with seams and large vein-array angles promote straight vein traces in limestone with stiffness typical of laboratory measurements, given the physical geologic conditions inferred from the burial history of the limestone strata.

  5. [Treatment of nontumoral portal vein thrombosis in cirrhosis].

    Science.gov (United States)

    Bañares, Rafael; Catalina, María-Vega

    2014-07-01

    Portal vein thrombosis in cirrhosis is a relatively common complication associated with the presence of an accompanying prothrombotic phenotype of advanced cirrhosis. The consequences of portal vein thrombosis are relevant because it can be associated with impaired hepatic function, might contraindicate hepatic transplantation and could increase morbidity in the surgical procedure. There is controversy concerning the most effective treatment of portal vein thrombosis, which is based on information that is seldom robust and whose primary objective is to achieve a return to vessel patency. Various studies have suggested that starting anticoagulation therapy early is associated with portal vein repatency more frequently than without treatment and has a low rate of complications. There are no proven data on the type of anticoagulant (low-molecular-weight heparins or dicoumarin agents) and the treatment duration. The implementation of TIPS is technically feasible in thrombosis without cavernous transformation and is associated with portal vein recanalization in a significant proportion of cases. Thrombolytic therapy does not appear to present an adequate balance between efficacy and safety; its use is therefore not supported for this indication. The proper definition of treatment for portal vein thrombosis requires properly designed studies to delimit the efficacy and safety of the various alternatives. PMID:25087714

  6. Classification of the drainage patterns of the renal veins.

    Science.gov (United States)

    Satyapal, K S

    1995-01-01

    Variations in the drainage patterns of the renal veins are well described, but existing classifications of the renal veins have deficiencies. This study aimed to formulate a practical classification of their drainage patterns, taking into consideration the number of primary tributaries, additional renal veins and variations. The venous system of 306 kidneys (from 131 males and 22 females) obtained from 100 pairs of resin casts and 53 pairs of plastinated kidneys were analysed. Based on a proposed definition of the renal vein, 3 major types (I, II, III) were identified using the drainage pattern of the primary renal vein tributaries and the renal vein as a basis on both the left and right sides. Type IA occurred most frequently (38.6%) and was commoner on the left. Type IB was the second most frequent (25.2%), with the other types showing lower and similar frequencies (10.1-14.4%). Statistically significant differences were noted between the left and right kidneys with regard to the classification into the different types (P < 0.0001). The proposed classification system is practical and has surgical and uroradiological relevance. Images Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 PMID:7649831

  7. Retinal vein occlusion in Benin City, Nigeria

    Directory of Open Access Journals (Sweden)

    Odarosa M Uhumwangho

    2016-01-01

    Full Text Available Background: Retinal vein occlusion (RVO is the most common occlusive retinal vascular disorder and results in varying degrees of visual loss. Aim: To determine the pattern of presentation, risk factors, and treatment outcomes in a group of patients with RVO seen in a tertiary hospital in Nigeria. Materials and Methods: Medical records of patients who presented to the University of Benin Teaching Hospital, Benin City, Nigeria in whom a diagnosis of RVO was made over a 5 years period were reviewed. Data obtained were analyzed with the GraphPad Instat Software, Inc. version V2.05a program, San Diego, Califonia and a P < 0.05 considered significant. Results: There were 20 patients made of 14 (70.0% males and 6 (30.0% females with a mean age of 62.7 ± 10.4 years. There were 15 (68.2% eyes with central RVO, 3 (13.6% eyes with branch RVO, and 4 (18.2% eyes with hemi RVO. Bilateral involvement occurred in 2 (10.0% patients. Risk factors included hypertension 14 (70.0%, diabetes mellitus 9 (45.0%, and glaucoma 5 (22.7%. Multiple risk factors were present in 14 (70.0% patients. Complications included macula edema 15 (68.2%, retinal neovascularization 5 (22.7%, neovascular glaucoma 3 (13.6%, and vitreous hemorrhage 2 (9.1%. Eyes which had definitive treatment with intravitreal antivascular endothelial growth factors and laser photocoagulation for macula edema and retinal neovascularization, respectively, had better visual acuity compared to eyes which did not receive these treatment, P = 0.002. Conclusion: The incidence and visual loss that occurs from RVO can be reduced by modifying known risk factors and early institution of appropriate therapy for complications that occur.

  8. Metamorphopsia Associated with Branch Retinal Vein Occlusion

    Science.gov (United States)

    Manabe, Koichiro; Tsujikawa, Akitaka; Osaka, Rie; Nakano, Yuki; Fujita, Tomoyoshi; Shiragami, Chieko; Hirooka, Kazuyuki; Uji, Akihito; Muraoka, Yuki

    2016-01-01

    Purpose To apply M-CHARTS for quantitative measurements of metamorphopsia in eyes with acute branch retinal vein occlusion (BRVO) and to elucidate the pathomorphology that causes metamorphopsia. Methods This prospective study consisted of 42 consecutive patients (42 eyes) with acute BRVO. Both at baseline and one month after treatment with ranibizumab, metamorphopsia was measured with M-CHARTS, and the retinal morphological changes were examined with optical coherence tomography. Results At baseline, metamorphopsia was detected in the vertical and/or horizontal directions in 29 (69.0%) eyes; the mean vertical and horizontal scores were 0.59 ± 0.57 and 0.52 ± 0.67, respectively. The maximum inner retinal thickness showed no association with the M-CHARTS score, but the M-CHARTS score was correlated with the total foveal thickness (r = 0.43, p = 0.004), the height of serous retinal detachment (r = 0.31, p = 0.047), and the maximum outer retinal thickness (r = 0.36, p = 0.020). One month after treatment, both the inner and outer retinal thickness substantially decreased. However, metamorphopsia persisted in 26 (89.7%) of 29 eyes. The posttreatment M-CHARTS score was not correlated with any posttreatment morphological parameters. However, the posttreatment M-CHARTS score was weakly correlated with the baseline total foveal thickness (r = 0.35. p = 0.024) and closely correlated with the baseline M-CHARTS score (r = 0.78, p < 0.001). Conclusions Metamorphopsia associated with acute BRVO was quantified using M-CHARTS. Initial microstructural changes in the outer retina from acute BRVO may primarily account for the metamorphopsia. PMID:27123642

  9. Portal Vein Occlusion after Biliary Metal Stent Placement in Hilar Cholangiocarcinoma

    OpenAIRE

    Woo, Kyung Hee; Kim, Jin Bae; Chang, Yoon Jung; Kim, Hyo Jung; Baek, Il Hyun; Ko, Jin Seok; Woo, Ji Young; Kim, Hong Dae; Lee, Myung Seok

    2008-01-01

    Acute symptomatic portal vein obstruction related to biliary stenting is an extremely rare but life-threatening complication. This usually occurs in patients with either tumor invasion into the portal vein or pre-existing portal vein thrombus. Therefore, the portal vein should be carefully evaluated before placing a biliary metallic stent in such patients. We describe a case of acute portal vein obstruction after placing metallic biliary stents in a patient with a periductal-infiltrating type...

  10. Portal vein occlusion after biliary metal stent placement in hilar cholangiocarcinoma.

    Science.gov (United States)

    Woo, Kyung Hee; Kim, Jin Bae; Chang, Yoon Jung; Kim, Hyo Jung; Baek, Il Hyun; Ko, Jin Seok; Woo, Ji Young; Kim, Hong Dae; Lee, Myung Seok

    2008-06-01

    Acute symptomatic portal vein obstruction related to biliary stenting is an extremely rare but life-threatening complication. This usually occurs in patients with either tumor invasion into the portal vein or pre-existing portal vein thrombus. Therefore, the portal vein should be carefully evaluated before placing a biliary metallic stent in such patients. We describe a case of acute portal vein obstruction after placing metallic biliary stents in a patient with a periductal-infiltrating type of hilar cholangiocarcinoma. PMID:20485610

  11. Percutaneus treatment of varicose veins with bipolar radiofrequency ablation

    Energy Technology Data Exchange (ETDEWEB)

    Boon, R.; Akkersdijk, G.J.M. [Department of Surgery, Spaarne Hospital, Hoofddorp (Netherlands); Nio, D., E-mail: dnio@spaarneziekenhuis.n [Department of Surgery, Spaarne Hospital, Hoofddorp (Netherlands)

    2010-07-15

    The traditional surgical treatment of an incompetent great saphenous vein (GSV) and small saphenous vein (SSV) is challenged by endovenous techniques. Bipolar radio frequency induced thermo therapy (RFITT) is a new endovenous treatment, which occludes the vein by using the venous wall as a conductor. Linear endovenous energy densitiy (LEED) describes the amount of energy used for vein closure. Material/methods: From March 2007 till April 2009, two cohorts (23 W and 20 W) were compared, respectively 280 and 178 patients. GSV and SSV were separately analyzed. Follow-up was performed at 3 weeks and 1 year post-operatively with duplex ultrasound, to assess vein closure and perioperative complaints. A visual analog scale (VAS) pain score (range 0-10) was documented. For patients operated after October 2008 follow-up was performed at least 6 months after surgery. Results: 528 GSV and 76 SSV were treated. For the GSV a significant difference in LEED 40.8 17.1 in the 20 W cohort was found, resulting in higher occlusion rates 90.6% compared to 82.7% after 3 weeks. Follow-up of 1 year in the 20 W cohort showed 88.7% occlusion. Multivariate analysis showed that pullback speed (OR 3.7, CI 1.1-12.4) and CEAP classification (OR 3.1, CI 1.7-5.6) were significant predictors for vein occlusion. Despite a higher LEED, post-operative complaints were not significantly worse. Conclusion: RFITT is a safe and effective method to treat incompetent saphenous veins. Slower pullback speed with higher LEED results in higher closure rates without causing more pain.

  12. Percutaneus treatment of varicose veins with bipolar radiofrequency ablation

    International Nuclear Information System (INIS)

    The traditional surgical treatment of an incompetent great saphenous vein (GSV) and small saphenous vein (SSV) is challenged by endovenous techniques. Bipolar radio frequency induced thermo therapy (RFITT) is a new endovenous treatment, which occludes the vein by using the venous wall as a conductor. Linear endovenous energy densitiy (LEED) describes the amount of energy used for vein closure. Material/methods: From March 2007 till April 2009, two cohorts (23 W and 20 W) were compared, respectively 280 and 178 patients. GSV and SSV were separately analyzed. Follow-up was performed at 3 weeks and 1 year post-operatively with duplex ultrasound, to assess vein closure and perioperative complaints. A visual analog scale (VAS) pain score (range 0-10) was documented. For patients operated after October 2008 follow-up was performed at least 6 months after surgery. Results: 528 GSV and 76 SSV were treated. For the GSV a significant difference in LEED 40.8 17.1 in the 20 W cohort was found, resulting in higher occlusion rates 90.6% compared to 82.7% after 3 weeks. Follow-up of 1 year in the 20 W cohort showed 88.7% occlusion. Multivariate analysis showed that pullback speed (OR 3.7, CI 1.1-12.4) and CEAP classification (OR 3.1, CI 1.7-5.6) were significant predictors for vein occlusion. Despite a higher LEED, post-operative complaints were not significantly worse. Conclusion: RFITT is a safe and effective method to treat incompetent saphenous veins. Slower pullback speed with higher LEED results in higher closure rates without causing more pain.

  13. Influence of occlusion of hepatic vein on drug concentration in portal vein during drug administration

    International Nuclear Information System (INIS)

    Objective: To evaluate the value of transcatheter chemotherapy through superior mesenteric artery (SMA) and hepatic artery (HA) when hepatic vein (HV) was temporally occluded. Methods: Altogether ten dogs, each of them was undengone four groups of experiments (A, B, C, D) respectively and subjected under self-control. A: transcatheter infusion of 5-Fu by SMA with HV occlusion (SMAI-THVO). B: only transcatheter infusion of 5-Fu throguh SMA(SMAI). C: infusion of 5-Fu through HA with HV occlusion (TAI-THVO). D: only infusion of 5-Fu through HA(TAI). 5 ml PV blood, withdrawn each once at 0.5, 5, 10, 15, 20, 30 min. after infusion of drug for each group respectively, was taken for analysis. The high performance liquid chromatograph (HPLC) was used to measure the blood concentration of 5-Fu in PV for pharmacokinetics, and the post-occlusion angiographic changes were analyzed. Results: The peak concentration (cm) of 5-Fu of occlusion groups (A and C) and the area under the curve (AUC) of 5-Fu were greater than those in control groups (B and D), A>B>C>D(P<0.05). The total value of clearance in occlusion groups (A and C) was lower than that of the control groups (B and C), A< B< C< D(P<0.01). Hepatic arterial angiography showed more arterial branches and dense shadows of the corresponding hepatic segments with hepatic venous occlusion. Conclusion: SMAI-THVO and TAI-THVO can markedly increase the blood concentration of 5-Fu in hepatic tissue and portal vein serving as a dual-route therapy with prolongation of anti-cancer effect. (authors)

  14. Multiple ligation of the proximal greater saphenous vein in the CHIVA treatment of primary varicose veins

    Directory of Open Access Journals (Sweden)

    Roberto Delfrate

    2014-06-01

    Full Text Available Saphenous femoral disconnection is the key point of most surgical techniques in the treatment of primary varicose vein surgery. The aim of this study is to compare and analyze different techniques for conservative saphenousfemoral ligation or disconnection. These techniques can be to perform mini invasive open surgery and are suitable for implementation of the conservative hemodynamic correction of venous insufficiency (CHIVA method. The aim was to present the follow-up by retrospective analysis of three different ligation-disconnection techniques of the proximal great saphenous vein (GSV according to the CHIVA method at the GSV end, i.e. between the very end of the GSV and the first arch tributary, according to the CHIVA method. The first thecnique consisted of a surgical division (crossotomy. The other two consisted of triple superposed ligation with No. 2 non-absorbable braided coated suture without division labeled TSFL (triple saphenous flush ligation and No. 0 polypropylenene ligation TPL (triple polypropylene ligation. The difference between TSFL and TPL was in the thickness and type of material of the thread, though both were non-absorbable. The follow up of 56 TPL procedures, 61 crossotomy procedures, and 82 TSFL procedures was analysed. The follow-up consisted of checking the sapheno-femoral junction occlusion with Duplex color ultra sound. The incidence rates of neovascularization (new vessels in the ligation or surgical disconnection site with saphenous-femoral reflux during the Valsalva maneuver were: 4.9% for the crossotomy group, 6.1% for the TSFL group and 37.5% for the TPL group. The data analysed show satisfactory results with both crossotomy and TSFL. Crossotomy has proven to be an effective technique for performing saphenous-femoral disconnection, but TSFL could also be a reliable, safe and low-cost varicose mini-invasive surgery in outpatients. TPL appeared to be less reliable.

  15. EndoVascular Laser Therapy (EVLT of Varicose Veins

    Directory of Open Access Journals (Sweden)

    S. Akhlaghpour

    2005-08-01

    Full Text Available Introduction & Background: Tens of millions of people – up to 40% of women and 25% of men – suffer from lower limb varicose veins. Several risk factors are also identified including genetics, gender, age, obesity, hor-mones, pregnancy, and occupation. Sclerotheraphy is commonly used to treat small varicose veins. Medium-sized and large varicose veins can be removed by a surgical procedure called Stab avulsion or phlebectomy. EVLT is a new alternative surgical method for varicose veins. Patients & Methods: Using 980nm and 940nm diode laser with a 600micron bare-tipped fiber endoluminally under ultrasound and Doppler monitoring, we treated 43 patients in Noor Vein Clinic, Tehran, Iran. Results: The procedure was well tolerated by all patients with just a local anesthesia. No major complications were encountered. We noticed that 980nm and 940nm are the perfect wave lengths causing less post-operational discomfort for patients with enhanced recovery time due to fewer traumas to the adjacent tissues. One small size skin burn and local paresthesia were observed. Conclusion: We concluded that EVLT with diode laser is a safe, fast, and effective method with low recurrence rate.

  16. Hyperhomocysteinemia promotes vascular remodeling in vein graph in mice.

    Science.gov (United States)

    Tan, Hongmei; Shi, Chengwei; Jiang, Xiaohua; Lavelle, Muriel; Yu, Caijia; Yang, Xiaofeng; Wang, Hong

    2014-01-01

    This study investigated the role and mechanism of Hyperhomocysteinemia (HHcy) on vascular remodeling in mice. We assessed the effect of HHcy on vascular remodeling using a carotid arterial vein patch model in mice with the gene deletion of cystathionine-beta-synthase (Cbs). Vein grafts were harvested 4 weeks after surgery. Cross sections were analyzed using Verhoeff-van Gieson staining, Masson`s Trichrome staining, and immunostaining for morphological analysis and protein level assessment. The effect of Hcy on collagen secretion was examined in cultured rat aortic smooth muscle cells (RASMC). We found that Cbs-/- mice with severe HHcy exhibited thicker neointima and a higher percentage of luminal narrowing in vein grafts. In addition, severe HHcy increased elastin and collagen deposition in the neointima. Further, severe HHcy increases CD45 positive cells and proliferative cells in vein grafts. Finally, Hcy increases collagen secretion in RASMC. These results demonstrate that HHcy increases neointima formation, elastin and collagen deposition following a carotid arterial vein patch. The capacity of Hcy to promote vascular fibrosis and inflammation may contribute to the development of vascular remodeling. PMID:24896329

  17. SWI enhances vein detection using gadolinium in multiple sclerosis

    International Nuclear Information System (INIS)

    Susceptibility weighted imaging (SWI) combined with the FLAIR sequence provides the ability to depict in vivo the perivenous location of inflammatory demyelinating lesions – one of the most specific pathologic features of multiple sclerosis (MS). In addition, in MS white matter (WM) lesions, gadolinium-based contrast media (CM) can increase vein signal loss on SWI. This report focuses on two cases of WM inflammatory lesions enhancing on SWI images after CM injection. In these lesions in fact the CM increased the contrast between the parenchyma and the central vein allowing as well, in one of the two cases, the detection of a vein not visible on the same SWI sequence acquired before CM injection

  18. Velocity Estimation of the Main Portal Vein with Transverse Oscillation

    DEFF Research Database (Denmark)

    Brandt, Andreas Hjelm; Hansen, Kristoffer Lindskov; Nielsen, Michael Bachmann;

    2015-01-01

    This study evaluates if Transverse Oscillation (TO) can provide reliable and accurate peak velocity estimates of blood flow the main portal vein. TO was evaluated against the recommended and most widely used technique for portal flow estimation, Spectral Doppler Ultrasound (SDU). The main portal...... vein delivers blood from the bowls to the liver, and patients with certain liver diseases have decreased flow in the portal vein. Errors in velocity estimation with SDU are well described, when the beam-to-flow angle is >70 degrees. TO estimates the flow angle independently and is not limited by the...... measurements were performed with a commercial ultrasound scanner (BK 3000, BK Ultrasound, Herlev Denmark) and a convex probe (BK ultrasound 6C2, Herlev, Denmark). Ten healthy volunteers were scanned, and recordings of the portal flow during 3-5 heartbeats were conducted with an intercostal and subcostal view...

  19. Renal vein doppler sonography in rabbits with acute ureteral obstruction: usefulness of impedance index of renal vein

    Energy Technology Data Exchange (ETDEWEB)

    Sohn, Kyung Myung; Chung, Su Kyo; Lee, Sung Yong [College of Medicine, The Catholic Univ. of Korea, Seoul (Korea, Republic of)

    2004-05-01

    To evaluate the usefulness of the impedance index of the renal vein for the diagnosis of acute obstructive uropathy in rabbits. Ligation of the left ureter was done in 12 rabbits. Doppler sonography of the interlobar veins in both kidneys was checked before and 30 minutes, 1, 3, 6, 9 and 24 hours after ureteral ligation. The venous impedance index [(peak flow signal-least flow signal)/peak flow signal] was compared between the obstructed and non-obstructed kidneys for all periods. The change in the impedance index after ureteral ligation was also compared between the obstructed and non-obstructed kidneys. A decrease in the impedance index of the intrarenal vein was observed starting from 30 mins atter ureteral ligation, and the index remained low up to 24 hours after ureteral ligation. The obstructed kidneys had a significantly lower impedance index than the contralateral kidneys for all six of the postligation measurements (p< 0.05). There were significant differences in the change of impedance index after ureteral ligation between the obstructed and non-obstructed kidneys (p< 0.05). The impedance index of the intrarenal vein was significantly decreased in the obstructed kidneys. The measurement of the impedance index of the intrarenal vein using Doppler sonography could provide a useful method of diagnosing obstructive uropathy.

  20. Renal vein doppler sonography in rabbits with acute ureteral obstruction: usefulness of impedance index of renal vein

    International Nuclear Information System (INIS)

    To evaluate the usefulness of the impedance index of the renal vein for the diagnosis of acute obstructive uropathy in rabbits. Ligation of the left ureter was done in 12 rabbits. Doppler sonography of the interlobar veins in both kidneys was checked before and 30 minutes, 1, 3, 6, 9 and 24 hours after ureteral ligation. The venous impedance index [(peak flow signal-least flow signal)/peak flow signal] was compared between the obstructed and non-obstructed kidneys for all periods. The change in the impedance index after ureteral ligation was also compared between the obstructed and non-obstructed kidneys. A decrease in the impedance index of the intrarenal vein was observed starting from 30 mins atter ureteral ligation, and the index remained low up to 24 hours after ureteral ligation. The obstructed kidneys had a significantly lower impedance index than the contralateral kidneys for all six of the postligation measurements (p< 0.05). There were significant differences in the change of impedance index after ureteral ligation between the obstructed and non-obstructed kidneys (p< 0.05). The impedance index of the intrarenal vein was significantly decreased in the obstructed kidneys. The measurement of the impedance index of the intrarenal vein using Doppler sonography could provide a useful method of diagnosing obstructive uropathy

  1. Hepatic vein flow pattern in children: assesment with Doppler sonography

    International Nuclear Information System (INIS)

    Background: Aim of this study is to establish normal hepatic vein flow pattern and effect of age, sex, activity and feeding status on the hepatic flow pattern in normal Turkish children less than 15 years of ages and also to compare our values with the previously reported studies. Method: Hepatic vein flow patterns were evaluated in 150 children (83 male, 67 female) without any cardiac, pulmonary and liver disease by using Doppler sonography. Blood flow patterns were compared with age, sex, activity, and feeding status of the children. Results: Only 44% of the children had triphasic flow pattern in all hepatic veins. Monophasic flow pattern was the most common flow pattern in children less then 1 year of age. Triphasic flow pattern increase after 1 year of age. Although most of the children older than 1 year of age had triphasic flow pattern, there is some variation in the flow patterns of the hepatic veins in the same subject. Triphasic hepatic flow pattern is most commonly seen in the left hepatic vein and least commonly seen in the right hepatic vein. There was no significant difference between male and girl, children who were agitated or calm and fasting or not fasting in respect to triphasic flow pattern. Conclusion: Liver stiffening is not only the reason for abnormal hepatic flow pattern and some other physiologic factors may also lead to mono and/or diphasic flow pattern in the children. Absence of triphasic flow pattern must not be accepted as a liver pathology in children especially younger than 1 year of age

  2. Automatic classification of retinal vessels into arteries and veins

    Science.gov (United States)

    Niemeijer, Meindert; van Ginneken, Bram; Abràmoff, Michael D.

    2009-02-01

    Separating the retinal vascular tree into arteries and veins is important for quantifying vessel changes that preferentially affect either the veins or the arteries. For example the ratio of arterial to venous diameter, the retinal a/v ratio, is well established to be predictive of stroke and other cardiovascular events in adults, as well as the staging of retinopathy of prematurity in premature infants. This work presents a supervised, automatic method that can determine whether a vessel is an artery or a vein based on intensity and derivative information. After thinning of the vessel segmentation, vessel crossing and bifurcation points are removed leaving a set of vessel segments containing centerline pixels. A set of features is extracted from each centerline pixel and using these each is assigned a soft label indicating the likelihood that it is part of a vein. As all centerline pixels in a connected segment should be the same type we average the soft labels and assign this average label to each centerline pixel in the segment. We train and test the algorithm using the data (40 color fundus photographs) from the DRIVE database1 with an enhanced reference standard. In the enhanced reference standard a fellowship trained retinal specialist (MDA) labeled all vessels for which it was possible to visually determine whether it was a vein or an artery. After applying the proposed method to the 20 images of the DRIVE test set we obtained an area under the receiver operator characteristic (ROC) curve of 0.88 for correctly assigning centerline pixels to either the vein or artery classes.

  3. Budd-Chiari and inferior caval vein syndromes due to membranous obstruction of the liver veins. Successful treatment with angioplasty and transcaval TIPS

    DEFF Research Database (Denmark)

    Holland-Fischer, Peter

    2004-01-01

    The case is presented of a 25-year-old Caucasian patient with Budd-Chiari syndrome due to membranous obstruction of the liver veins and inferior caval vein syndrome as a result of secondary hyperplasia of the caudate lobe of the liver, obstructing the caval vein. Diagnosis was established by...... intravascular pressure measurements, ultrasound examinations and caval and liver vein angiograms. Treatment consisting of stent placement in the outlet of a hepatic vein and subsequent transjugular intrahepatic porto-systemic shunt (TIPS) insertion via the caval vein was successful. After 34 months of follow......-up the stents remain open and the patient is symptom free. This successful combination of stent placement and TIPS has not been described before. The case report is followed by a review of the literature on the use of angioplasty in short hepatic vein stenosis and TIPS in Budd-Chiari syndrome. It is...

  4. Absent right superior caval vein (vena cava) with normal atrial arrangement.

    OpenAIRE

    Choi, J. Y.; Anderson, R H; Macartney, F J

    1987-01-01

    Eight cases of absent right superior caval vein (vena cava) with normal atrial arrangement from the Great Ormond Street database were reviewed. In each case the right subclavian vein and jugular vein drained into a persistent left superior caval vein through a bridging vein. In six cases the left superior caval vein drained into the right atrium by way of the coronary sinus, and in two cases it drained into the left atrium directly because of the complete unroofing of the coronary sinus. The ...

  5. Management of Deep Vein Thrombosis (DVT) Prophylaxis in Trauma Patients

    Science.gov (United States)

    Paydar, Shahram; Sabetian, Golnar; Khalili, Hosseinali; Fallahi, Javad; Tahami, Mohammad; Ziaian, Bizhan; Abbasi, Hamid Reza; Bolandparvaz, Shahram; Ghaffarpasand, Fariborz; Ghahramani, Zahra

    2016-01-01

    Deep vein thrombosis (DVT) and pulmonary embolism (PTE) are known as venous thromboembolism (VTE). DVT occurs when a thrombus (a blood clot) forms in deep veins of the body, usually in the lower extremities. It can cause swelling or leg pain, but sometimes may occur with no symptoms. Awareness of DVT is the best way to prevent the VTE. Patients with trauma are at increased risk of DVT and subsequent PE because of coagulopathy in patients with multiple trauma, DVT prophylaxis is essential but the VTE prophylaxis strategy is controversial for the trauma patients. The risk factors for VTE includes pelvic and lower extremity fractures, and head injury. PMID:27162921

  6. Mortality in Patients with Central Retinal Vein Occlusion

    DEFF Research Database (Denmark)

    Bertelsen, Mette; Linneberg, Allan; Christoffersen, Nynne; Vorum, Henrik; Gade, Else Fredsted; Larsen, Michael

    2014-01-01

    PURPOSE: To assess mortality in patients with central retinal vein occlusion (CRVO). DESIGN: Registry-based cohort study. PARTICIPANTS AND CONTROLS: Four hundred thirty-nine photographically verified CRVO patients and a control cohort of 2195 unexposed subjects matched by age and gender and alive.......27; 95% CI, 1.03-1.56) and in women 60 to 69 years of age (SMR, 1.94; 95% CI, 1.22-3.08). CONCLUSIONS: Central retinal vein occlusion was associated with an overall increase in mortality compared with controls that was attributed statistically to cardiovascular disorders and diabetes. We recommend...

  7. Intrahepatic Sarcomatoid Cholangiocarcinoma with Portal Vein Thrombosis: A Case Report

    International Nuclear Information System (INIS)

    A 53-year-old man was admitted to our hospital with a liver mass. CT and MR images showed the presence of a multilobulated mass with hemorrhagic and necrotic foci in the left hepatic lobe. In addition, thrombosis of the left portal vein was noted. The patient underwent surgery for total removal of the mass. A pathological examination revealed the presence of an intrahepatic sarcomatoid cholangiocarcinoma with portal vein thrombosis. The patient underwent a left hepatectomy and chemotherapy. However, the disease recurred with metastases after five months. The patient underwent surgery and chemotherapy for the recurred tumor

  8. Intrahepatic Sarcomatoid Cholangiocarcinoma with Portal Vein Thrombosis: A Case Report

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Jae Hoon; Kim, Jin Woong; Heo, Suk Hee; Jeong, Yong Yeon; Kang, Heoung Keun [Chonnam National University Hwasun Hospital, Hwasun (Korea, Republic of)

    2009-05-15

    A 53-year-old man was admitted to our hospital with a liver mass. CT and MR images showed the presence of a multilobulated mass with hemorrhagic and necrotic foci in the left hepatic lobe. In addition, thrombosis of the left portal vein was noted. The patient underwent surgery for total removal of the mass. A pathological examination revealed the presence of an intrahepatic sarcomatoid cholangiocarcinoma with portal vein thrombosis. The patient underwent a left hepatectomy and chemotherapy. However, the disease recurred with metastases after five months. The patient underwent surgery and chemotherapy for the recurred tumor.

  9. Selective Versus Total Pulmonary Vein Isolation in Atrial Fibrillation Ablation

    Directory of Open Access Journals (Sweden)

    Sonia Ammar, MD; Tilko Reents, MD; Stephanie Fichtner, MD; Gabriele Hessling, MD; Isabel Deisenhofer, MD

    2014-06-01

    Full Text Available One of the greatest discoveries in cardiac electrophysiology was the recognition of the crucial role of pulmonary vein (PV myocardial sleeves for atrial fibrillation (AF initiation. Based on this concept, catheter ablation of paroxysmal AF by pulmonary vein isolation (PVI has become a routine approach for this arrhythmia. An attractive concept implies the selective isolation of the arrhythmogenic PVs only. Based on the most important studies regarding this approach, we describe pros and cons of a selective PVI compared to a complete PVI and try to illustrate why selective PVI did not find widespread acceptance in the electrophysiologic community.

  10. Finger Vein Recognition Using Local Line Binary Pattern

    Directory of Open Access Journals (Sweden)

    Bakhtiar Affendi Rosdi

    2011-11-01

    Full Text Available In this paper, a personal verification method using finger vein is presented. Finger vein can be considered more secured compared to other hands based biometric traits such as fingerprint and palm print because the features are inside the human body. In the proposed method, a new texture descriptor called local line binary pattern (LLBP is utilized as feature extraction technique. The neighbourhood shape in LLBP is a straight line, unlike in local binary pattern (LBP which is a square shape. Experimental results show that the proposed method using LLBP has better performance than the previous methods using LBP and local derivative pattern (LDP.

  11. MDCT findings of right circumaortic renal vein with ectopic kidney

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Min Kyun; Ku, Young Mi; Chun, Chang Woo; Lee, Su Lim [Department of Radiology, Uijeongbu St. Mary' s Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu (Korea, Republic of)

    2013-10-15

    Anomalies of renal vasculature combined with ectopic kidneys were found on a multi-detector CT scan. Knowledge of renal vascular variation is very important for surgical exploration, radiologic intervention and staging for urologic cancer. We present an extremely rare case of a right circumaortic renal vein combined with a right ectopic kidney. The right kidney was located at the level between the third and fifth lumbar vertebra. The right circumaortic renal vein crossed the aorta and returned to the inferior vena cava behind the aorta.

  12. Gemstone silica veins in Kremenjacha volcanic rocks (Serbia)

    International Nuclear Information System (INIS)

    The Jeshevac volcanic complex located in central Serbia is made up of various Tertiary volcanic rocks. Kremenjacha hill is situated on the SW rim of the Jeshevac volcanic complex. Silica veins found in this site are made up of chalcedony varieties and crystalline quartz. Jasper veins are examined more thoroughly in this paper. Microscopic analysis has shown it is made up of cryptocrystalline silica with fluidal structure. X-ray powder diffraction analysis of the samples has shown crystalline silica-quartz, ruling out the presence of amorphous silica-opal. The results of spectrochemical analysis have indicated the presence of colouring agents originating mostly from ultramafic and mafic rocks. (Author)

  13. 股静脉替代门静脉和肾静脉的应用解剖%Applied anatomy on reconstructions of the portal vein and renal vein using the femoral vein

    Institute of Scientific and Technical Information of China (English)

    颜井伟; 任为; 孙善全

    2012-01-01

    Objective; To demonstrate the feasibility and safety of reconstructions of the portal vein and renal vein using the femoral vein. Methods-, 60 adults corpses (male 32, female 28) fixed with formalin were randomly used. The femoral vein, popliteal vein, deep femoral vein, communicating vein, portal vein and renal vein were dissected, observed and measured. The available femoral vein was the segment of the femoral vein from the point at which the deep femoral vein empties into the femoral vein to the lower edge of abductor hiatus. The length of the available femoral vein, portal vein, renal vein and their squashed diameter were measured. Results-. The length of the available femoral vein in male and female was 18. 8 cm±2. 3 cm and 15. 1 em± 1. 5 cm, respectively. The diameter of squashed vein in male and female was 15. 8 mm±0. 8 mm and 14. 0 mm±. 1 mm, respectively. The length was significantly correlated with gender and height The double-femoral vein was observed in 16 sides (14%). The femoral-popliteal collateral vein was observed in 48 sides (42. 1%). The deep femoral-popliteal communicating vein was observed in 38 sides (33. 3%). There were 20 sides (17. 5%) observed with none of the communicating vein. The length of the portal vein, left renal vein and right renal vein was 6. 8 cm±0. 8 cm, 6. 5 cm±0. 6 cm and 2. 8 cm ± 0. 5 cm, respectively. The diameter of the squashed portal vein, left renal vein and right renal vein was 19. 2 cm±0. 8 mm, 20. 4 tnm±0. 6 mm and 17. 4 mm±0. 7 mm, respectively. There was no gender difference between them. Conclusion: It is a reliable and safety to harvest the femoral vein as a vascular graft because of the existence of the great saphenous vein and communicating vein between the popliteal vein and femoral vein or deep femoral vein. The femoral vein can be used as a conduit for vascular reconstruction of the portal vein and renal vein.%目的:探讨股静脉作为血管移植材料替代门静脉和肾静脉的可行性

  14. Comorbidity in patients with branch retinal vein occlusion

    DEFF Research Database (Denmark)

    Bertelsen, Mette; Linneberg, Allan René; Rosenberg, Niels Thomas; Christoffersen, Nynne; Vorum, Henrik; Gade, Else; Larsen, Michael

    2012-01-01

    To evaluate comorbidity before and after the diagnosis of branch retinal vein occlusion to determine whether it is a consequence of arterial thickening and therefore could serve as a diagnostic marker for other comorbidities and to evaluate the risk factors for the development of such occlusion....

  15. Pulmonary vein and cavotricuspid isthmus ablation in situs inversus totalis.

    Science.gov (United States)

    Benjamin, Mina M; Kipp, Ryan; Wright, Jennifer

    2016-02-01

    Pulmonary vein isolation (PVI) with cavotricuspid isthmus (CTI) ablation is feasible in patients with situs inversus totalis. Orientation challenges are improved with the use of electroanatomical mapping prior to transseptal puncture. Care must be taken to note the opposing anatomic locations of important structures such as the left atrial appendage, descending aorta, and phrenic nerve. PMID:26862406

  16. Saphenous Vein Sparing Superficial Inguinal Dissection in Lower Extremity Melanoma

    Directory of Open Access Journals (Sweden)

    Muhammed Beşir Öztürk

    2014-01-01

    Full Text Available Aim. The classic inguinal lymph node dissection is the main step for the regional control of the lower extremity melanoma, but this surgical procedure is associated with significant postoperative morbidity. The permanent lymphedema is the most devastating long-term complication leading to a significant decrease in the patient’s quality of life. In this study we present our experience with modified, saphenous vein sparing, inguinal lymph node dissections for patients with melanoma of the lower extremity. Methods. Twenty one patients (10 women, 11 men who underwent saphenous vein sparing superficial inguinal lymph node dissection for the melanoma of lower extremity were included in this study. The effects of saphenous vein sparing on postoperative complications were evaluated. Results. We have observed the decreased rate of long-term lymphedema in patients undergoing inguinal lymphadenectomy for the lower extremity melanoma. Conclusion. The inguinal lymphadenectomy with saphenous vein preservation in lower extremity melanoma patients seems to be an oncologically safe procedure and it may offer reduced long-term morbidity.

  17. Ileocolic Arteriovenous Fistula with Superior Mesenteric Vein Aneurism: Endovascular Treatment

    International Nuclear Information System (INIS)

    We report a case of a venous aneurysm secondary to an acquired ileocolic arteriovenous fistula in a 64-year-old woman with recurrent abdominal pain and history of appendectomy. The aneurysm was diagnosed by ultrasound and computed tomography. Angiography showed an arteriovenous fistula between ileocolic branches of the superior mesenteric artery and vein. This vascular abnormality was successfully treated with coil embolization

  18. Mathematical Modeling of Radiofrequency Ablation for Varicose Veins

    Directory of Open Access Journals (Sweden)

    Sun Young Choi

    2014-01-01

    Full Text Available We present a three-dimensional mathematical model for the study of radiofrequency ablation (RFA with blood flow for varicose vein. The model designed to analyze temperature distribution heated by radiofrequency energy and cooled by blood flow includes a cylindrically symmetric blood vessel with a homogeneous vein wall. The simulated blood velocity conditions are U = 0, 1, 2.5, 5, 10, 20, and 40 mm/s. The lower the blood velocity, the higher the temperature in the vein wall and the greater the tissue damage. The region that is influenced by temperature in the case of the stagnant flow occupies approximately 28.5% of the whole geometry, while the region that is influenced by temperature in the case of continuously moving electrode against the flow direction is about 50%. The generated RF energy induces a temperature rise of the blood in the lumen and leads to an occlusion of the blood vessel. The result of the study demonstrated that higher blood velocity led to smaller thermal region and lower ablation efficiency. Since the peak temperature along the venous wall depends on the blood velocity and pullback velocity, the temperature distribution in the model influences ablation efficiency. The vein wall absorbs more energy in the low pullback velocity than in the high one.

  19. Changes in the retinal veins in acute optic neuritis

    DEFF Research Database (Denmark)

    Engell, T; Sellebjerg, F; Jensen, C

    1999-01-01

    retinae (PR) and 2 had venous sheathing (VS). Probable MS was found in 15 patients without prior symptoms of MS. One had PR and VS, and 2 had VS. Twenty patients had mono-symptomatic ON, none had retinal changes. CONCLUSION: Changes of the retinal veins should alert the clinician to a probable diagnosis...

  20. The pathology of facial vein blood sampling in mice

    DEFF Research Database (Denmark)

    Hansen, Ket; Harslund, Jakob le Fèvre; Bollen, Peter

    2014-01-01

    Introduction: The use of retro-orbital blood sampling is prohibited in Denmark. For this reason, alternative methods are used for obtaining larger blood samples of a good quality. The facial vein is generally recommended for this. However, we have experienced discomfort for mice subjected to facial...

  1. Recurrence of cystic adventitial disease in an interposed vein graft.

    Science.gov (United States)

    Ohta, T; Kato, R; Sugimoto, I; Kondo, M; Tsuchioka, H

    1994-09-01

    A case of cystic adventitial disease (CAD) of the popliteal artery with intermittent claudication in the left calf is reported. This patient was first treated by total excision of the cyst and the involved artery followed by graft interposition with an autogenous saphenous vein. Recurrence of CAD in the interposed vein graft was noted after 6 months, and excision of the cyst with the involved graft and graft interposition with an autogenous saphenous vein was again required. We consider that the definitive evidence from early recurrence in the interposed vein graft shown in this case will close the discussion of the cause of CAD. The cystic lesion is thought by some to originate from the adventitia; traumatic, embryologic, or systemic abnormality theories were proposed. We assume that the mucin-secreting synovial cells originating from the neighboring joint capsule, tendon sheath, or, in some cases, from the ganglion itself, directly invade the adventitia through any rough or injured crack caused by trauma to the adventitia or simply attach to and encircle the adventitia. Total resection of the lesion with grafting is the recommended treatment for CAD because of the excellent results. However, as shown in our case, complete removal of the synovial cells even by resection technique may be difficult; therefore intensive follow-up is fundamentally necessary in this disease. PMID:8079189

  2. Evaluation of Azygous Vein Aneurysm Using Integrated PET/MRI

    Energy Technology Data Exchange (ETDEWEB)

    Seo, Hyo Jung; Kang, Keon Wook; Lee, Dong Soo; Goo, Jin Mo; Kim, Young Tae; Park, Young Sik; Cheon, Gi Jeong [Seoul National Univ. College of Medicine, Seoul (Korea, Republic of)

    2014-06-15

    A previously healthy, non-smoking, 72-year-old woman was referred to our hospital with abnormal chest X-ray and chest discomfort. A 3.5-cm, well-defined, right paratracheal mass was revealed on non-contrast chest computed tomography (CT), which was suspected to be an azygous vein aneurysm, lymph adenopathy or neurogenic tumor. Whole-body integrated positron emission tomography/magnetic resonance imaging (PET/MRI) (Biograph mMR; Siemens Healthcare, Erlangen, Germany) was performed for the differential diagnosis. A homogenously enhancing mass connected with the azygous vein was well visualized in a post-contrast volumetric interpolated gradient echo (VIBE) sequence. Additionally, the PET showed minimal {sup 18}F-fluorodeoxyglucose (FDG) uptake (maximum standardized uptake value [SUVmax], 1.83), similar to that of the great vessels, with no filling defect to suggest thromboembolism and no significant FDG uptake to suggest active thrombo-embolism or malignancy. The imaging findings in integrated PET/MRI were useful to characterize azygous vein aneurysm. The patient had a video-assisted thoracoscopic surgery to relieve the symptom of chest pain. A congenital etiology of azygous vein aneurysm was confirmed by pathology.

  3. Subclavian Vein Cannulation Success Rate in Neonates and Children

    Science.gov (United States)

    Aminnejad, Reza; Razavi, Seyed Sajjad; Mohajerani, Seyed Amir; Mahdavi, Seyed Alireza

    2015-01-01

    Background: Central vein cannulation allows the administration of large volumes of fluids in short times and at high osmolarities for rehydration, volume replacement, chemotherapy, and parenteral nutrition. Percutaneous central venous line insertion has replaced peripheral venous cut-down as the primary mode of short-term venous access in children. Objectives: The aim of our study was to delineate some aspects of this procedure as well as its success rate and relative risk in pediatrics. Patients and Methods: Totally, 3264 subclavian vein cannulations in neonates and children were analyzed regarding successful catheterization attempts and early complication rates after the procedure retrospectively in Mofid Hospital (Tehran, Iran). Results: There were 1340 newborn patients (first 28 days of life) in our study population. In these newborns, only 55 cannulations failed; one patient was complicated with pneumothorax; guide wires malfunctioned in 21 cases; and first- attempt cannulation success was reported in only 981 cases. In the remaining 1924 patients, between one month and 8 years old, only 14 attempts at the cannulation of the subclavian vein failed and 1655 cases had first-attempt cannulation success. Conclusions: The cannulation of the central vein in neonates and children in a skilled hand would be performed with great success rate and low complications. PMID:26161322

  4. Ruptured saphenous vein graft pseudoaneurysm successfully treated with covered stents.

    Science.gov (United States)

    Yonezu, Keisuke; Funayama, Hiroshi; Katayama, Takuji; Yamaguchi, Atsushi; Ako, Junya; Momomura, Shin-Ichi

    2016-04-01

    Saphenous vein graft (SVG) pseudoaneurysms are rare complications following coronary bypass graft surgery. A 46-year-old man presented with streptococcal infectious endocarditis and needed sequential operations for aortic root reconstruction. Shortly after the surgeries, a composite SVG on the right coronary artery developed a ruptured pseudoaneurysm, which was successfully treated using covered stents. PMID:25917780

  5. Abernethy malformation with portal vein aneurysm in a child

    Directory of Open Access Journals (Sweden)

    Sheragaru H Chandrashekhara

    2011-01-01

    Full Text Available Abernethy malformation is an extremely rare anomaly of the splanchnic venous system. We describe multidetector computed tomography findings of an incidentally detected Abernethy malformation with portal vein aneurysm in a two-and-half-year old child. The computed tomography scan was performed for the evaluation of respiratory distress, poor growth, and loss of appetite.

  6. Role of magnetic resonance venography in assessment of intra-thoracic central veins in hemodialysis

    Directory of Open Access Journals (Sweden)

    Mahmoud Abdel Latif

    2015-12-01

    Conclusion: MRV is a highly sensitive technique in the diagnosis of patency and steno-occlusive disease of intrathoracic central veins and may be used as an alternative to DSV for the abnormalities of central veins in hemodialysis patients.

  7. Caudal shif ting of hepatic vein anastomosis inright liver living donor liver transplantation

    Institute of Scientific and Technical Information of China (English)

    Sheung Tat Fan

    2008-01-01

    BACKGROUND: In right liver living donor liver trans-plantation, hepatic venous anastomosis is performed using the recipient's right hepatic vein oriifce. There may be situations that the portal vein is short or the right liver graft is small, leading to dififculty in portal vein, hepatic artery or duct-to-duct anastomosis. METHODS: The recipient's right hepatic vein oriifce is closed partially for 2 cm at the cranial end or totally, and a new venotomy is made caudal to the right hepatic vein oriifce. Hepatic vein anastomosis is performed with the new venotomy. RESULTS: The distance between the liver graft hilum and hepatoduodenal ligament is reduced. Portal vein, hepatic artery and biliary anastomosis could be performed without tension or conduit. CONCLUSION: Caudal shifting of hepatic vein anasto-mosis facilitates implantation of a right liver living donor graft.

  8. The mineralized veins and the impact of old mine workings on the environment at Segura, central Portugal

    OpenAIRE

    Antunes, I. M. H. R.; Neiva, A. M. R.; Silva, M. M. V. G.

    2002-01-01

    At Segura, granitic pegmatite veins with cassiterite and lepidolite, hydrothermal Sn-W quartz veins and Ba-Pb-Zn quartz veins intruded the Cambrian schist-metagraywacke complex and Hercynian granites. Cassiterite from Sn-W quartz veins is richer in Ti and poorer in Nb and Nb+Ta than cassiterite from granitic pegmatite. Wolframite from Sn-W quartz veins is enriched in ferberite component. The Sn-W quartz veins contain pyrrhotite, arsenopyrite, sphalerite, chalcopyrite, stannite, matildite and ...

  9. Local SIFT analysis for hand vein pattern verification

    Science.gov (United States)

    Wang, Yunxin; Wang, Dayong; Liu, Tiegen; Li, Xiuyan

    2009-11-01

    The newly emerging hand vein recognition technology has attracted remarkable attention for its uniqueness, noninvasion, friendliness and high reliability. It is unavoidable to produce small location deviation of human hand in the practical application; however, the existing recognition methods are sensitive to the hand shift or rotation. The test sample is matched with a series of registered images after affine transformation including the shift or rotation by most of researches, this affine transform method can remedy the location deviation to some extent, but the limited range for hand shift and rotation brings users much inconvenience and the computational cost also increases greatly. Aiming at this issue, a hand vein recognition algorithm based on local SIFT (Scale Invariant Feature Transform) analysis is developed in this contribution, which has practical significance due to its translation and rotation invariance. First, the hand vein image is preprocessed to remove the background and reduce image noises, and then SIFT features are extracted to describe the gradient information of hand vein. Many one-to-more matching pairs are produced by the common matching method of SIFT features, thus the matching rule is improved by appending a constrained condition to ensure the one-to-one matching, which is achieved by selecting feature point with the nearest distance as the optimal match. Finally the match ratio of features between the registered and test images is calculated as the similarity measurement to verify the personal identification. The experiment results show that FRR (False Rejection Rate) is only 0.93% when FAR (False Acceptance Rate) is 0.002%, and EER (Equal Error Rate) is low to 0.12%, which demonstrate the proposed approach is valid and effective for hand vein authentication.

  10. Female Pelvic Vein Embolization: Indications, Techniques, and Outcomes

    International Nuclear Information System (INIS)

    Until recently, the main indication for pelvic vein embolization (PVE) in women was to treat pelvic venous congestion syndrome (PVC) but increasingly, patients with refluxing pelvic veins associated with leg varicosities are also being treated. A more unusual reason for PVE is to treat pelvic venous malformations, although such lesions may be treated with sclerotherapy alone. Embolotherapy for treating PVC has been performed for many years with several published studies included in this review, whilst an emerging indication for PVE is to treat lower limb varicosities associated with pelvic vein reflux. Neither group, however, has been subjected to an adequate randomized, controlled trial. Consequently, some of the information presented in this review should be considered anecdotal (level III evidence) at this stage, and a satisfactory ‘proof’ of clinical efficacy remains deficient until higher-level evidence is presented. Furthermore, a wide range of techniques not accepted by all are used, and some standardization will be required based on future mandatory prospective studies. Large studies have also clearly shown an unacceptably high recurrence rate of leg varicose veins following venous surgery. Furthermore, minimally or non-invasive imaging is now revealing that there is a refluxing pelvic venous source in a significant percentage of women with de novo leg varicose veins, and many more with recurrent varicosities. Considering that just over half the world’s population is female and a significant number of women not only have pelvic venous reflux, but also have associated leg varicosities, minimally invasive treatment of pelvic venous incompetence will become a common procedure

  11. Female Pelvic Vein Embolization: Indications, Techniques, and Outcomes

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, Anthony James, E-mail: consultant@radiologist.co.uk [The Imaging Clinic (United Kingdom)

    2015-08-15

    Until recently, the main indication for pelvic vein embolization (PVE) in women was to treat pelvic venous congestion syndrome (PVC) but increasingly, patients with refluxing pelvic veins associated with leg varicosities are also being treated. A more unusual reason for PVE is to treat pelvic venous malformations, although such lesions may be treated with sclerotherapy alone. Embolotherapy for treating PVC has been performed for many years with several published studies included in this review, whilst an emerging indication for PVE is to treat lower limb varicosities associated with pelvic vein reflux. Neither group, however, has been subjected to an adequate randomized, controlled trial. Consequently, some of the information presented in this review should be considered anecdotal (level III evidence) at this stage, and a satisfactory ‘proof’ of clinical efficacy remains deficient until higher-level evidence is presented. Furthermore, a wide range of techniques not accepted by all are used, and some standardization will be required based on future mandatory prospective studies. Large studies have also clearly shown an unacceptably high recurrence rate of leg varicose veins following venous surgery. Furthermore, minimally or non-invasive imaging is now revealing that there is a refluxing pelvic venous source in a significant percentage of women with de novo leg varicose veins, and many more with recurrent varicosities. Considering that just over half the world’s population is female and a significant number of women not only have pelvic venous reflux, but also have associated leg varicosities, minimally invasive treatment of pelvic venous incompetence will become a common procedure.

  12. Nuclide Transport and Diffusion for Vein and Fracture Flow

    International Nuclear Information System (INIS)

    Modelling radionuclide transport through crystalline rock is usually based on a small water flow in a system of narrow fractures. This flow is denoted as fracture flow. In our model, it implies planar water-conducting channels and adjacent zones of dominant matrix diffusion. According to the constitution of the rock, it can be necessary to consider additionally a vein flow being characterized by cylindrical water-conducting channels and adjacent zones of dominant matrix diffusion. Transport calculations, based on a dual porosity concept, were performed for vein as well as for fracture flow. An extensive discussion of the results provides an overview on important parameter dependencies and on the major vein flow effects. Formulae for quick estimates are given to guide quantitative interpretation of break-through curves. The discussion of analytical results for nuclide diffusion from a planar and from a cylindrical boundary backs up the comments on matrix diffusion. The following effects of vein flow onto the break-through curves are illustrative examples of useful findings: (1) The peak height can be very strongly reduced compared to fracture flow. The peak arrival time, however, is only slightly changed. (2) The asymptotic part of the tail is flatter than the well-known t-3/2 decrease for fracture flow. (3) The bump at the end of the tail, generated by the limitation of the diffusion zones, is substantially larger than for fracture flow. A double-peak break-through curve, therefore, can emerge from many cases of nuclide transport. (4) Sorption on the surfaces of diffusion-accessible pores can substantially change the break-through curves. The vein to fracture flow ratios of the break-through peak data, however, remain essentially equal. This holds for the whole range of investigated retardation factors from 7 to 27'000. The investigations presented contribute to sophisticated interpretations of break-through curves and improve the physical understanding of nuclide

  13. Automatic determination of the artery vein ratio in retinal images

    Science.gov (United States)

    Niemeijer, Meindert; van Ginneken, Bram; Abràmoff, Michael D.

    2010-03-01

    A lower ratio between the width of the arteries and veins (Arteriolar-to-Venular diameter Ratio, AVR) on the retina, is well established to be predictive of stroke and other cardiovascular events in adults, as well as an increased risk of retinopathy of prematurity in premature infants. This work presents an automatic method that detects the location of the optic disc, determines the appropriate region of interest (ROI), classifies the vessels in the ROI into arteries and veins, measures their widths and calculates the AVR. After vessel segmentation and vessel width determination the optic disc is located and the system eliminates all vessels outside the AVR measurement ROI. The remaining vessels are thinned, vessel crossing and bifurcation points are removed leaving a set of vessel segments containing centerline pixels. Features are extracted from each centerline pixel that are used to assign them a soft label indicating the likelihood the pixel is part of a vein. As all centerline pixels in a connected segment should be the same type, the median soft label is assigned to each centerline pixel in the segment. Next artery vein pairs are matched using an iterative algorithm and the widths of the vessels is used to calculate the AVR. We train and test the algorithm using a set of 25 high resolution digital color fundus photographs a reference standard that indicates for the major vessels in the images whether they are an artery or a vein. We compared the AVR values produced by our system with those determined using a computer assisted method in 15 high resolution digital color fundus photographs and obtained a correlation coefficient of 0.881.

  14. Zapora mrežničnih ven: Retinal vein occlusion:

    OpenAIRE

    Jaki, Polona; Mavri, Alenka; Štalc, Monika

    2011-01-01

    Retinal vein occlusion is a common disease, especially in the elderly, and is associated with significant visual morbidity, as a consequence of persistent macular oedema, macular ischemia, and in the advanced stages of the disease, due to retinal or iris neovascularisation with vitreal haemorrhages or neovascular glaucoma. There are two types of retinal vein occlusion with respect to the site of occlusion: branch retinal vein occlusion and central retinal vein occlusion. The obstruction is ma...

  15. Extracellular matrix remodelling in response to venous hypertension: proteomics of human varicose veins

    OpenAIRE

    Barallobre-Barreiro, Javier; Oklu, Rahmi; Lynch, Marc; Fava, Marika; Baig, Ferheen; Yin, Xiaoke; Barwari, Temo; Potier, David N.; Albadawi, Hassan; Jahangiri, Marjan; Porter, Karen E; Watkins, Michael T.; Misra, Sanjay; Stoughton, Julianne; Mayr, Manuel

    2016-01-01

    Aims Extracellular matrix remodelling has been implicated in a number of vascular conditions, including venous hypertension and varicose veins. However, to date, no systematic analysis of matrix remodelling in human veins has been performed. Methods and results To understand the consequences of venous hypertension, normal and varicose veins were evaluated using proteomics approaches targeting the extracellular matrix. Varicose saphenous veins removed during phlebectomy and normal saphenous ve...

  16. Veia gástrica posterior: hipertensão porta Posterior gastric vein: portal hipertension

    Directory of Open Access Journals (Sweden)

    Alcino Lázaro da Silva

    1999-10-01

    Full Text Available A veia gástrica posterior não é muito citada nos livros de anatomia e nos trabalhos sobre hipertensão porta. Estudou-se sua anatomia, freqüência e desembocadura. Ela foi encontrada em 54% dos casos e, em 100%, desembocava na veia esplênica. Discute-se a vantagem ou não de sua ligadura ou preservação no tratamento cirúrgico da hipertensão porta.The posterior gastric vein has not been mentioned very often neither in anatomy textbooks nor in portal hypertension papers. The authors studied the anatomy, frequency and confluence of this vein because is a huge variety in the presentation of esophageal varices. Twenty-six adult preserved corpses (twenty females and six males had a wide abdominal incision allowing the dissection of the portal system, identifying the frequency and confluence of its tributaries, notably the posterior gastric vein. The portal vein, in all cases, was formed by the confluence of the superior mesenteric vein with the splenic vein and had a mean length of 6.4 cm. The splenic vein had a mean length of 6.5 cm. The left gastric vein was tributary of the portal vein in 50% of the cases and in 30% of the cases in the splenic vein. The right gastric vein had it's confluence to portal vein in 30 % of the cases and to the splenic vein in 4 %. The inferior mesenteric vein was tributary of the splenic vein in 54% of the cases and in the superior mesenteric vein in 46%. The left gastro-omental vein had its confluence to the splenic vein in 50% of the cases and to the inferior polar vein in 34 %. The middle colic vein had its confluence to superior mesenteric vein in 42% of the cases, to inferior mesenteric vein in 12% and to splenic vein in 8%. The posterior gastric vein was found in 54% of the corpses, and in all cases it was a tributary of the splenic vein, in retropancreatic position, coming from the esophageal-gastric junction. These findings agree with previous papers describing a prevalence of 60% of posterior gastric

  17. Intraoperative endothelial damage is associated with increased risk of stenoses in infrainguinal vein grafts

    DEFF Research Database (Denmark)

    Nielsen, T G; Hesse, B; Boehme, M W;

    2001-01-01

    Saphenous vein injury is believed to predispose to vein graft stenoses. The aims of this study were to assess the endothelial injury associated with infrainguinal vein bypass surgery by serial measurements of serum thrombomodulin concentration as well as by platelet scintigraphy, and to relate th...

  18. Non satellite veins in the pelvic limb of the llama (Lama glama).

    Science.gov (United States)

    Graziotti, G H; Ríos, C M; Rodríguez Menéndez, J M; Victorica, C L

    1999-09-01

    The objective of this study was to determine the major differences in the venous system of the pelvic limb of the llama (Lama glama) and that of other mammals, including humans. Eight adult llamas, preserved by means of 6% formalin solution at 0 degrees C, were dissected. The venous system was perfused with a solution of 17% coloured industrial gelatin. Two venous systems are recognised, superficial and deep. The veins of the deep system follow the same course as the arteries, except for two important veins located in the femoral, popliteal and crural regions. A more voluminous vein than the femoral originates in a venous tripod in the proximal part of the femoral canal and forms an anastomosis with the femoral vein distally. The popliteal vein gives off an expansion located along the popliteal region. In the leg, it continues with a vein that accompanies the tibial nerve and forms an anastomosis distally with the medial saphenous vein. The described venous distribution represents an interesting complement to the medial saphenous, popliteal and femoral veins, being more important than the last one for its volume. In the thigh it would correspond to the deep femoral vein as in humans and dogs; the homology in the popliteal and leg regions is too difficult because it probably corresponds to the caudal tibial vein of the human, the caudal branch of the medial saphenous vein, and the satellite vein of the tibial nerve in the horse. PMID:10456991

  19. Revealing Maximal Diameter of Upper Limb Superficial Vein with an Elevated Environmental Temperature.

    Science.gov (United States)

    Irfan, Hira; Ooi, Guo Shen; Kyin, May M; Ho, Pei

    2016-01-01

    Ultrasonography is the primary tool for preoperative analysis of vein morphology for fistula creation in patients with end-stage renal disease. This study examines the effect of environmental temperature on the superficial vein size. Superficial veins of thirteen healthy volunteers were marked at three sites: cephalic vein in left lateral arm near cubital fossa, cephalic vein in left forearm at wrist, and basilic vein in left medial arm near cubital fossa. Mean diameters were recorded using ultrasound probe at 26°C and 43°C. Body temperature was increased using a Bair Hugger blanket. Mean values from the two temperatures were analyzed using paired sample t-test. All three superficial vein sites displayed statistically significant increase in diameter when the temperature was increased from 26°C to 43°C. Paired t-test showed p values of 0.001 for cephalic vein at wrist, 0.01 for cephalic vein near cubital fossa, and 0.01 for basilic vein near cubital fossa. This study proved that environmental temperature exerts a statistically significant effect on vein size measured by ultrasound during preoperative assessment for vascular access. Not to the extent of 43°C, the authors would recommend setting the room temperature higher during ultrasound vascular assessment to avoid underestimating the superficial vein size. PMID:27597987

  20. Tip to midpoint observations on syntectonic veins, Ouachita orogen, Arkansas: Trading space for time

    Science.gov (United States)

    Cervantes, Pablo; Wiltschko, David V.

    2010-08-01

    By examining a vein from its tip to center, we have established the transition from a single filled fracture at the vein tip to typical 'crack-seal' textures observed in fibered, laminated veins. The vein is contained in the boudin neck of a sandstone layer within the Lower Ordovician Mazarn Formation, Benton Uplift, Ouachita orogen. The tip of the vein is composed of one or more isolated veinlets, defined as quartz-filled narrow (5-25 μm) fractures parallel to the larger vein's long dimension. Scanned SEM-based cathodoluminescence shows that quartz laminae of the same orientation and thickness are found throughout the vein. Wall-normal fibers first appear in the vein where detrital grains are cut by multiple veinlets, each veinlet mimicking the crystallographic orientation of the detrital grain, whereas later veinlets reflect the established crystallographic orientation of the fiber. Fibers throughout the vein retain evidence of having been formed by repeated fracturing and filling of a pre-existing grain (at the vein walls) or fiber. However, recrystallization later modified the fibers by obliterating some evidence of the veinlets and moving fiber walls. Boudin formation provided the extension site that localized fracturing and vein filling. The vein grows by the repeated addition of veinlets in the neck region. Recrystallization altered the shape of previously formed fibers.

  1. Palliative Portal Vein Stent Placement in Malignant and Symptomatic Extrinsic Portal Vein Stenosis or Occlusion

    International Nuclear Information System (INIS)

    This article evaluates the results of portal vein (PV) stent placement in patients with malignant extrinsic lesions stenosing or obstructing the PV and causing symptomatic PV hypertension (PVHT). Fourteen patients with bile duct cancer (n = 7), pancreatic adenocarcinoma (n = 4), or another cancer (n = 3) underwent percutaneous transhepatic portal venous stent placement because of gastroesophageal or jejunal varices (n = 9), ascites (n = 7), and/or thrombocytopenia (n = 2). Concurrent tumoral obstruction of the main bile duct was treated via the transhepatic route in the same session in four patients. Changes in portal venous pressure, complications, stent patency, and survival were evaluated. Mean ± standard deviation (SD) gradient of portal venous pressure decreased significantly immediately after stent placement from 11.2 mmHg ± 4.6 to 1.1 mmHg ± 1.0 (P < 0.00001). Three patients had minor complications, and one developed a liver abscess. During a mean ± SD follow-up of 134.4 ± 123.3 days, portal stents remained patent in 11 patients (78.6%); stent occlusion occurred in 3 patients, 2 of whom had undergone previous major hepatectomy. After stent placement, PVHT symptoms were relieved in four (57.1%) of seven patients who died (mean survival, 97 ± 71.2 days), and relieved in six (85.7%) of seven patients still alive at the end of follow-up (mean follow-up, 171.7 ± 153.5 days). Stent placement in the PV is feasible and relatively safe. It helped to relieve PVHT symptoms in a single session.

  2. Anatomical variation of thyroid veins on contrast-enhanced multi-detector row computed tomography

    International Nuclear Information System (INIS)

    Highlights: • This is the first study to demonstrate the anatomy of thyroid veins on contrasted-enhanced MDCT. • Identifying the thyroid vein on MDCT prior to selective venous sampling of parathyroid hormone provides clinical information to interventional radiologist. • Detecting especially the inferior thyroid veins with individual variability in numbers, locations, and lengths may have an effect on SVS for HPT and decrease the difficulty and time of the procedure. - Abstract: Objective: The objective of this study was to clarify the anatomical variation of thyroid veins into the systemic vein using contrast-enhanced multi-detector row computed tomography (MDCT). Design and methods: : The subjects were 80 patients (34 males and 46 females; mean age, 50.1 years; age range, 15–92 years) with neck diseases who underwent MDCT. The number and location of inflow points of the thyroid veins into the systemic vein, and the length from the junction of bilateral brachiocephalic veins to the orifice of inferior thyroid vein were investigated by reviewing the axial and coronal images. Results: All superior thyroid veins were detected. Right and left middle thyroid veins were identified in 39 and 29 patients, respectively. Right inferior thyroid veins, left inferior thyroid veins, and common trunks were detected in 43, 46, and 39 patients, respectively; in five patients, two left thyroid veins were identified. All left inferior thyroid veins and 34 common trunks flowed into the innominate vein, while right ones had some variations in inflow sites. Mean lengths were 3.01 ± 1.30 cm (range, 0.5–6.19) and 2.04 ± 0.91 cm (0.5–4.4) in the left inferior thyroid vein and common trunk, and 1.96 ± 1.05 cm (0.81–4.8) and 1.65 ± 0.69 cm (0.63–2.94) in the right one flowing into the right internal jugular vein and the innominate vein, respectively. Conclusions: The numbers and orifices of thyroid veins were identified at high rates on contrast-enhanced MDCT. This

  3. Anatomical variation of thyroid veins on contrast-enhanced multi-detector row computed tomography

    Energy Technology Data Exchange (ETDEWEB)

    Tomita, Hayato, E-mail: m04149@yahoo.co.jp [Department of Radiology, St. Marianna University School of Medicine, Yokohama City Seibu Hospital, 1197-1 Yasashicho, Asahi-ku, Yokohama, Kanagawa 241-0811 (Japan); Yamada, Takayuki; Murakami, Kenji; Hashimoto, Kazuki; Tazawa, Yoko; Kumano, Reiko [Department of Radiology, St. Marianna University School of Medicine, Yokohama City Seibu Hospital, 1197-1 Yasashicho, Asahi-ku, Yokohama, Kanagawa 241-0811 (Japan); Nakajima, Yasuo [Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511 (Japan)

    2015-05-15

    Highlights: • This is the first study to demonstrate the anatomy of thyroid veins on contrasted-enhanced MDCT. • Identifying the thyroid vein on MDCT prior to selective venous sampling of parathyroid hormone provides clinical information to interventional radiologist. • Detecting especially the inferior thyroid veins with individual variability in numbers, locations, and lengths may have an effect on SVS for HPT and decrease the difficulty and time of the procedure. - Abstract: Objective: The objective of this study was to clarify the anatomical variation of thyroid veins into the systemic vein using contrast-enhanced multi-detector row computed tomography (MDCT). Design and methods: : The subjects were 80 patients (34 males and 46 females; mean age, 50.1 years; age range, 15–92 years) with neck diseases who underwent MDCT. The number and location of inflow points of the thyroid veins into the systemic vein, and the length from the junction of bilateral brachiocephalic veins to the orifice of inferior thyroid vein were investigated by reviewing the axial and coronal images. Results: All superior thyroid veins were detected. Right and left middle thyroid veins were identified in 39 and 29 patients, respectively. Right inferior thyroid veins, left inferior thyroid veins, and common trunks were detected in 43, 46, and 39 patients, respectively; in five patients, two left thyroid veins were identified. All left inferior thyroid veins and 34 common trunks flowed into the innominate vein, while right ones had some variations in inflow sites. Mean lengths were 3.01 ± 1.30 cm (range, 0.5–6.19) and 2.04 ± 0.91 cm (0.5–4.4) in the left inferior thyroid vein and common trunk, and 1.96 ± 1.05 cm (0.81–4.8) and 1.65 ± 0.69 cm (0.63–2.94) in the right one flowing into the right internal jugular vein and the innominate vein, respectively. Conclusions: The numbers and orifices of thyroid veins were identified at high rates on contrast-enhanced MDCT. This

  4. Internal jugular vein: Peripheral vein adrenocorticotropic hormone ratio in patients with adrenocorticotropic hormone-dependent Cushing′s syndrome: Ratio calculated from one adrenocorticotropic hormone sample each from right and left internal jugular vein during corticotrophin releasing hormone stimulation test

    Directory of Open Access Journals (Sweden)

    Sachin Chittawar

    2013-01-01

    Full Text Available Background: Demonstration of central: Peripheral adrenocorticotropic hormone (ACTH gradient is important for diagnosis of Cushing′s disease. Aim: The aim was to assess the utility of internal jugular vein (IJV: Peripheral vein ACTH ratio for diagnosis of Cushing′s disease. Materials and Methods: Patients with ACTH-dependent Cushing′s syndrome (CS patients were the subjects for this study. One blood sample each was collected from right and left IJV following intravenous hCRH at 3 and 5 min, respectively. A simultaneous peripheral vein sample was also collected with each IJV sample for calculation of IJV: Peripheral vein ACTH ratio. IJV sample collection was done under ultrasound guidance. ACTH was assayed using electrochemiluminescence immunoassay (ECLIA. Results: Thirty-two patients participated in this study. The IJV: Peripheral vein ACTH ratio ranged from 1.07 to 6.99 ( n = 32. It was more than 1.6 in 23 patients. Cushing′s disease could be confirmed in 20 of the 23 cases with IJV: Peripheral vein ratio more than 1.6. Four patients with Cushing′s disease and 2 patients with ectopic ACTH syndrome had IJV: Peripheral vein ACTH ratio less than 1.6. Six cases with unknown ACTH source were excluded for calculation of sensitivity and specificity of the test. Conclusion: IJV: Peripheral vein ACTH ratio calculated from a single sample from each IJV obtained after hCRH had 83% sensitivity and 100% specificity for diagnosis of CD.

  5. The application of bilateral femoral vein approaches in interventional treatment of deep venous thrombosis of left lower extremity

    International Nuclear Information System (INIS)

    Objective: To investigate the feasibility of interventional catheterization with bilateral femoral vein approaches for performing the thrombolytic treatment of acute deep venous thrombosis of left lower extremity. Methods: Antegrade puncturing into the left femoral vein was carried out in eighteen patients with acute deep vein thrombosis in the left lower extremity after left iliac-femoral vein catheterization via the right femoral vein or the right jugular vein access failed. When the puncturing of the left femoral vein was successfully done and was confirmed by angiography, the guide wire was inserted into the inferior vena cava and was pulled out through the right femoral vein or right jugular vein, and a wire track was thus established. Then, retrograde insertion of the catheter was conducted along the wire from the right to the left until the catheter was placed into the left iliac-femoral vein for thrombolysis. Results: Of 18 cases,successful puncturing into the left femoral vein was achieved in 16, and an effective wire track was established between the left and right femoral veins, based on which the catheter was smoothly inserted into the left iliac-femoral vein via the right femoral vein or jugular vein. Catheter thrombolysis was employed for 3 to 14 days, the thrombus was completely dissolved and the lower extremity swelling subsided. During the course of thrombolysis, no obvious congestion or hematoma occurred at the puncturing site of the left femoral vein. Conclusion: For patients with deep vein thrombosis of left lower extremity, when left iliac-femoral vein catheterization via the right femoral vein or the right jugular vein access failed, the establishment of wire track by using bilateral femoral vein approaches for further catheterization of left iliac-femoral vein and subsequent thrombolysis is feasible in clinical practice. This technique is safe and minimally-invasive with higher success rate. (authors)

  6. Clinical anatomic study of the lower lumbar anterolateral vein: with respect to retroperitoneal endoscopic surgery

    Institute of Scientific and Technical Information of China (English)

    LU Sheng; XU Yong-qing; DING Zi-hai; WANG Yue-li; SHI Ji-hong; ZHONG Shi-zhen

    2008-01-01

    To study the anatomy of veins of the lower lumbar spine and provide the anatomic basement for laparoscopic lumbar surgery.Methods:A total of 15 formaldehyde-preserved cadavers were studied with special attention to the variety and surrounding structure of ascending lumbar vein(ALV)and iliolumbar veins(ILV),and their relationship with lumbar plexus.Results:ALV and ILV can be found on every sides,which have four variants including separate entry and common entry. The ascending vein and iliolumbar vein separately enter common iliac vein in 18 cases, and as a common stem enter the common iliac vein in 12 cases. Retracting common iliac vein medially both the ascending lumbar and the iliolumbar veins are always at risk of avulsion on exposure of the disc space. The injury of obturator nerve and lumbosacral trunk of lumbar plexus should be avoided.Conclusion:Awareness of these anatomic variation can prevent the hemorrhage and be helpful for the surgeon in performing a careful ligation of these veins before medial retraction of the common iliac vein. Our findings emphasize the need for proper dissection of ALV and ILV before ligature during exposure of the lower lumbar spine.

  7. Left testicular artery arching over the ipsilateral renal vein

    Institute of Scientific and Technical Information of China (English)

    Munekazu Naito; Hayato Terayama; Yoichi Nakamura; Shogo Hayashi; Takayoshi Miyaki; Masahiro Itoh

    2006-01-01

    Aim: To report two cases of the left testicular artery arching over the left renal vein (LRV) before running downward to the testis. Methods: The subjects were obtained from two Japanese cadavers. During the student course of gross-anatomical dissection, the anatomical relationship between the testicular vessels and the renal vein was specifically observed. Results: The arching left testicular artery arose from the aorta below the LRV and made a loop around the LRV, which appeared to be mildly compressed between the arching artery and the psoas major muscle.Conclusion: Clinically, compression of the LRV between the abdominal aorta and the superior mesenteric artery occasionally induces LRV hypertension, resulting in varicocele, orthostatic protenuria and hematuria. Considering that the incidence of a left arching testicular artery is higher than that of a right one, an arching left artery could be an additional cause of LRV hypertension.

  8. Subclavian vein aneurysm secondary to a benign vessel wall hamartoma

    Energy Technology Data Exchange (ETDEWEB)

    Warren, Patrick [Nationwide Children' s Hospital, Section of Pediatric Interventional Radiology, Columbus, OH (United States); Spaeth, Maya [Nationwide Children' s Hospital, Section of Plastic and Reconstructive Surgery, Columbus, OH (United States); Prasad, Vinay [Nationwide Children' s Hospital, Section of Pediatric Pathology, Columbus, OH (United States); McConnell, Patrick [Nationwide Children' s Hospital, Section of Cardiothoracic Surgery, Columbus, OH (United States)

    2013-11-15

    Venous aneurysms are rare clinical entities, particularly in children, and their presentation and natural history often depend on the anatomical location and underlying etiology. We present a single case of a 12-year-old girl who presented with a palpable right supraclavicular mass. Imaging evaluation with CT, conventional venography, MRI and sonography revealed a large fusiform subclavian vein aneurysm with an unusual, mass-like fibrofatty component incorporated into the vessel wall. The girl ultimately required complete resection of the right subclavian vein with placement of a synthetic interposition graft. This case provides a radiology/pathology correlation of an entity that has not previously been described as well as an example of the utility of multiple imaging modalities to aid diagnosis and preoperative planning. (orig.)

  9. Imaging and Radiological Interventions of Portal Vein Thrombosis

    International Nuclear Information System (INIS)

    Portal vein thrombosis (PVT) is diagnosed by imaging methods. Once diagnosed by means of ultrasound, Doppler ultrasound can be performed to distinguish between a benign and malignant thrombus. If further information is required, magnetic resonance angiography or contrast-enhanced computed tomography is the next step, and if these tests are unsatisfactory, digital subtraction angiography should be performed. Many papers have been published dealing with alternative methods of treating PVT, but the material is fairly heterogeneous. In symptomatic non-cavernomatous PVT, recanalization using local methods is recommended by many authors. Implantation of transjugular intrahepatic portosystemic shunt is helpful in cirrhotic patients with non-cavernomatous PVT in reducing portal pressure and in diminishing the risk of re-thrombosis. In non-cirrhotic patients with recent PVT, some authors recommend anticoagulation alone. In chronic thrombotic occlusion of the portal vein, local measures may be implemented if refractory symptoms of portal hypertension are evident

  10. Vascular endothelial growth factor blocking agents in retinal vein occlusion

    Directory of Open Access Journals (Sweden)

    Chris Canning

    2008-01-01

    Full Text Available This paper summarises the current status of the use of vascular endothelial growth factor (VEGF blocking agents in retinal vein occlusion. There have been no randomised controlled trials comparing this treatment with the current standard treatment (largely laser so the lower grade evidence of single treatment case series and anecdotal reports are discussed. VEGF blockers are good at reducing macular oedema in the short term, do improve visual acuity in many cases, and do not seem to adversely affect the long term revascularisation that is necessary to overcome the vein occlusion. VEGF blocking agents are not used in isolation in this condition - they will remain an adjunct to systemic and other local treatments. The literature was reviewed in online searches of Embase and Ovid and the papers quoted are a representative sample of a larger body of publications.

  11. Subclavian vein aneurysm secondary to a benign vessel wall hamartoma

    International Nuclear Information System (INIS)

    Venous aneurysms are rare clinical entities, particularly in children, and their presentation and natural history often depend on the anatomical location and underlying etiology. We present a single case of a 12-year-old girl who presented with a palpable right supraclavicular mass. Imaging evaluation with CT, conventional venography, MRI and sonography revealed a large fusiform subclavian vein aneurysm with an unusual, mass-like fibrofatty component incorporated into the vessel wall. The girl ultimately required complete resection of the right subclavian vein with placement of a synthetic interposition graft. This case provides a radiology/pathology correlation of an entity that has not previously been described as well as an example of the utility of multiple imaging modalities to aid diagnosis and preoperative planning. (orig.)

  12. Cephalic vein: Saviour in the microsurgical reconstruction of breast and head and neck cancers

    Directory of Open Access Journals (Sweden)

    Vinay K Shankhdhar

    2012-01-01

    Full Text Available Background: Reconstruction with microvascular free flaps is considered the reconstructive option of choice in cancer of the head and neck regions and breast. Rarely, there is paucity of vessels, especially the veins, at the recipient site. The cephalic vein with its good caliber and constant anatomy is a reliable recipient vein available in such situations. Materials and Methods: It is a retrospective study from January 2010 to July 2012 and includes 26 patients in whom cephalic vein was used for free-flap reconstruction in head and neck (3 cases and breast cancers (23 cases. Results: All flaps in which cephalic vein was used survived completely. Conclusion: Cephalic vein can be considered as a reliable source of venous drainage when there is a non-availability/unusable of veins during free-flap reconstruction in the head and neck region and breast and also when additional source of venous drainage is required in these cases.

  13. Iliac Vein Compression Syndrome due to Bladder Distention Caused by Urethral Calculi

    Directory of Open Access Journals (Sweden)

    Akiko Ikegami

    2015-01-01

    Full Text Available We report a rare case of iliac vein compression syndrome caused by urethral calculus. A 71-year-old man had a history of urethral stenosis. He complained of bilateral leg edema and dysuria for 1 week. Physical examination revealed bilateral distention of the superficial epigastric veins, so obstruction of both common iliac veins or the inferior vena cava was suspected. Plain abdominal computed tomography showed a calculus in the pendulous urethra, distention of the bladder (as well as the right renal pelvis and ureter, and compression of the bilateral common iliac veins by the distended bladder. Iliac vein compression syndrome was diagnosed. Bilateral iliac vein compression due to bladder distention (secondary to neurogenic bladder, benign prostatic hyperplasia, or urethral calculus as in this case is an infrequent cause of acute bilateral leg edema. Detecting distention of the superficial epigastric veins provides a clue for diagnosis of this syndrome.

  14. Surgical treatment of hepatocellular carcinoma with portal vein tumor thrombus

    OpenAIRE

    Jia, Weidong

    2015-01-01

    Portal vein tumor thrombus (PVTT) is one of the important biological characteristics of hepatocellular carcinoma (HCC), and also a serious complication and a metastatic mode. Surgical treatment is still the most effective therapy for HCC with PVTT. This article describes the history and present situation of surgical treatment of HCC with PVTT, the anatomical basis for PVTT formation, classification of PVTT, indications for surgery, selection of surgical approaches, and evaluation of the surgi...

  15. Isolated rupture of the superficial vein of the penis

    OpenAIRE

    Eken, Alper; Acil, Meltem; ARPACI, TANER

    2014-01-01

    Penile emergencies are rare but when they do occur, prompt diagnosis and treatment are warranted. Emergent conditions of the male genitalia are mainly traumatic, vascular or infectious. Penile emergencies are usually caused by trauma to the penis, during sexual intercourse or manipulation of an erect penis during masturbation. One of the traumatic vascular penile emergencies is superficial penile dorsal vein rupture. This is a rare condition, with just a few reported cases. It is usually take...

  16. Congenital absence of the portal vein in a boy

    International Nuclear Information System (INIS)

    Congenital absence of the portal vein (CAPV) is a malformation that is generally thought to be limited to females. We encountered an 11-year-old boy with this malformation. In 17 previously reported cases of CAPV, 2 were male. Three male patients, including our case, were Abernethy type Ib malformation. They had no associated liver tumour and two had no additional congenital abnormality. Conversely, 13 of the 15 female patients had congenital abnormalities and 6 had liver mass lesions. (orig.)

  17. Circumaortic Left Renal Vein Associated with Juxtarenal Abdominal Aortic Aneurysm

    OpenAIRE

    Hashizume, Koji; Taniguchi, Shinichiro; Ariyoshi, Tsuneo; Hisata, Yoichi; Tanigawa, Kazuyoshi; Miura, Takashi; Sumi, Mizuki; Eishi, Kiyoyuki

    2013-01-01

    The patient was an 82-year-old man who was found to have a juxtarenal abdominal aortic aneurysm accompanied by a circumaortic left renal vein (CLRV). During dissection of the proximal anastomosis site the CLRV was injured, but was successfully repaired. A graft implantation was performed below the renal arteries. The incidence of CLRV is thought to be rare, however it is found in 7% of cadavers donated for anatomy. CLRV may cause unexpected bleeding by inadvertent dissection of the abdominal ...

  18. Interventional therapy for iliac vein compression syndrome and secondary thrombosis

    International Nuclear Information System (INIS)

    Objective: To evaluate the value of interventional therapy in treatment of iliac compression syndrome (ICS) and subsequent venous thrombosis. Methods: Examined by DSA, 125 cases were diagnosed of iliac vein compression and subsequent thrombosis. In 39 eases of ICS (group 1), left: right=4.6:1. In 86 eases of ICS complicated with subsequent thrombosis (group 2), left: right= 4.7:1. The patients of iliac vein compression and compression-related iliac vein stenosis or occlusion without fresh thrombus were treated by percutaneous transluminal angioplasty (PTA) and self-expandable stenting. In those cases with fresh thrombosis the inferior vena cava filter were inserted before thrombosis suction, mechanical thrombus ablation, PTA, stenting and transcatheter thrombolysis. The Chi-square test for comparison of proportions was used to test statistical significance. Results: In 39 cases of ICS, 38 cases were treated by PTA and stenting. In 86 eases of deep vein thrombosis complicated with ICS, 83 cases were treated by various interventional therapy. There was no significant difference in the efficiency of intraluminal treatment between the two groups at discharge (97.4% and 96.5%, χ2=0.000, P>0.05) and at 6 months follow-up(96.3% and 90.2%, χ2=0.266, P>0.05), the difference in excellent-good rate of the two groups was significant at discharge(94.9% and 79.1%, χ2=3.879, P2=4.441, P<0.05). Conclusions: Interventional treatment for ICS and secondary thrombosis is safe and effective. (authors)

  19. Musculoskeletal Sepsis Associated with Deep Vein Thrombosis in a Child.

    Science.gov (United States)

    Lee, Chih-Ying; Lee, Yu-Sheng; Tsao, Pei-Chen; Jeng, Mei-Jy; Soong, Wen-Jue

    2016-06-01

    Deep vein thrombosis (DVT) is a rare disease in pediatric patients. We report a pediatric patient who developed DVT in association with methicillin-resistant Staphylococcus aureus (MRSA) bacteremia complicated with septic arthritis, osteomyelitis, and myositis extensively. It is crucial to consider musculoskeletal infection associated with DVT in any child who presents with severe swollen limbs and limitations of motion. Prompt antibiotic and anticoagulant treatments should be initiated to reduce the risk of fatal complications. PMID:24279976

  20. Intravitrel bevacizumab in different type of retinal vein occlusions

    International Nuclear Information System (INIS)

    Background: Retinal vein occlusion is frequent cause of visual loss with insufficient treatment options. Many treatment options have been tried in the past including intravitreal triamcenoloneacetonide injection. This study was conducted to evaluate the efficacy and complications of intravitreal injection of Bevacizumab in different types of retinal vein occlusion. Method: This interventional study was carried out at Al Ibrahim eye hospital, Karachi from July 2011 to December 2012. Patients diagnosed with retinal vein occlusion of any type were included in the study using non-probability purposive sampling technique, after informed written consent. Patients were injected intra-vitreally with Bevacizumab 1.25 mg/0.05 ml under sterilized technique in operation room. Best corrected visual acuity and optical coherence tomography was repeated in every follow up along with the detailed fundoscopy and intraocular pressure measurement. Data analysis was done using SPSS-20.0. Results: A total 278 patients were included in the study according to the inclusion and exclusion criteria. Mean age of the patients was 54.28 years (SD=5.62). Out of 278 patients included in the study, 132 had BRVO, 141 had CRVO while 5 had HRVO. Mean visual acuity before injection was 2.309 lines of Snellen's acuity chart read, with minimum of 1 line read and maximum of 4 lines read (standard deviation=l.00). After 12 weeks post injection, 92 patients read 7 lines (6/6) of Snellen's visual acuity chart. Mean visual acuity was 4.75 lines of Snellen's acuity chart read, with minimum of 1 line read and maximum of 7 lines read (standard deviation=1.00). 77 percentage of the patients had visual improvement after injection (p<0.05). Conclusion: Intravitreal bevacizumab injection is very effective in reducing macular thickness as well in improving visual acuity in all types of retinal vein occlusion. (author)

  1. Hydrothermal uranium vein deposits in Marysvale volcanic field, Utah

    International Nuclear Information System (INIS)

    Hydrothermal uranium veins are exposed over a 300 m (980 ft) vertical range in mines of the Central Mining area, near Marysvale, Utah. They cut 23 Ma quartz monzonite, 21 Ma granite, and 19 Ma rhyolite ash-flow tuff. The veins formed 18-19 Ma, in an area 1 km (0.6 mi) across, above the center of a composite magma chamber at least 12 x 6 km across that fed a sequence of 21-14 Ma hypabyssal granitic stocks, and rhyolitic lava flows, ash-flow tuffs, and volcanic domes. Intrusive pressure uplifted and fractured the roof; molybdenite-bearing, uranium-rich glassy dikes were intruded; and a breccia pipe and uranium-bearing veins were formed. The veins appear to have been deposited near the surface above a concealed rhyolite stock, where they filled high-angle fault zones and flat-lying to concave-downward pull-apart fractures. Low pH and fO2 hydrothermal fluids at temperatures near 2000 C (3920 F) permeated the fractured rocks; these fluids were rich in fluorine and potassium, and contained uranium as uranous-fluoride complexes. Fluid-wall rock interaction increased fluid pH, causing precipitation of uranium minerals. At the deepest exposed levels, wall rocks were altered to kaolinite and sericite, and uraninite, coffinite, jordisite, fluorite, molybdenite, quartz, and pyrite (with delta34S near zero per mil) were deposited. The fluids were progressively oxidized higher in the system; iron in the wall rocks was oxidized to hematite, and sooty uraninite and umohoite were deposited

  2. Portal Vein Thrombosis After Laparoscopic Splenectomy: An Ongoing Clinical Challenge

    OpenAIRE

    Miniati, Douglas N.; Padidar, Arash M.; Kee, Stephen T.; Krummel, Thomas M.; Mallory, Baird

    2005-01-01

    Objectives: Portal vein thrombosis (PVT) following open splenectomy is a potentially lethal complication with an incidence of up to 6%. The objective of this report is to describe our management of a recent laparoscopic case, discuss current therapies, and consider antiplatelet therapy for prophylaxis. Methods: Medical records, laboratory studies, and imaging studies pertaining to a recent case of a laparoscopic splenectomy were examined. Current literature related to this topic was reviewed....

  3. THE EXPERIMENTAL STUDY OF RECONSTRUCTION OF PORTAL VEIN BY PERITONEUM

    Institute of Scientific and Technical Information of China (English)

    陈伟强; 区庆嘉; 陈小萱; 肖明; 林俊荣

    1998-01-01

    Objective. To investigate the perironeum as a material using in the portal vein reconstruction. Methods. Twenty-one small healthy domestic pigs were used in the study, and divided into two groups. The observation period was twenty-four weeks, and divided into three stages. A section of portal vein about 2.5-3.0cm long was resected and replaced by autogenous peritoneum tube(APT)and autogenous vein respectively. The liver function tests, bloodflow dynamic examination, patency and pathological changes of the grafts were investigaed after the replacement. Results. All animals surviyed the operation and the subsequent observation. It showed that aspartate transminase(AST)were mildly elevated just after operation but recovered quickly in both groups. Portal bloodflow index(PI)and portal pressure were both a little higher than those before operations but all within normal range. Portography revealed a total patency of eight out of thirteen gratis in the experiment group,whereas a total patency of six out of eight in the control group, During the observation, portograhpy revealed five our of thirteen APT grafts were occluded in the experiment group, whereas two out of eight grafts were occluded in the control group. No dilatation grafts were seen. Abundant collsterals were seen around the occlusive graft. After twelve weeks of reconstruction, scanning electron microscopy revealed that APT grafts were covered with a layer of endothelial-like cells with a certain arranging direction. Conclusion. Peritoneum is a perspective self-material for portal reconstruction. Long term patency of the APT were a little lower than that of the autogenous vein. It is worth further studying.

  4. Double suicide genes selectively kill human umbilical vein endothelial cells

    OpenAIRE

    Liu Lunxu; Wang Yanping; Mei Longyong; Jia Weiguo; Che Guowei

    2011-01-01

    Abstract Background To construct a recombinant adenovirus containing CDglyTK double suicide genes and evaluate the killing effect of the double suicide genes driven by kinase domain insert containing receptor (KDR) promoter on human umbilical vein endothelial cells. Methods Human KDR promoter, Escherichia coli (E. coli) cytosine deaminase (CD) gene and the herpes simplex virus-thymidine kinase (TK) gene were cloned using polymerase chain reaction (PCR). Plasmid pKDR-CDglyTK was constructed wi...

  5. Etiology and portal vein thrombosis in Budd-Chiari syndrome

    Institute of Scientific and Technical Information of China (English)

    Oguz Uskudar; Meral Akdogan; Nurgul Sasmaz; Sevinc Yilmaz; Muharrem Tola; Burhan Sahin

    2008-01-01

    AIM: To research the etiology, portal vein thrombosis and other features of Budd-Chiari syndrome (BCS)patients prospectively.METHODS: A total of 75 patients (40 female, 35 male) who were diagnosed between January 2002 and July 2004 as having BCS were studied prospectively.Findings from on physical examination, ultrasonography,duplex ultrasonography and venography were analyzed.Hemogram and blood chemistry were studied at the time of diagnosis and on each hospital visit. Bone marrow examination and immune phenotyping were performed by a hematologist when necessary. Protein C, S, antithrombin Ⅲ, activated protein C resistance,and anticardiolipin antibodies, antinuclear antibodies,and anti ds-DNA were studied twice. The presence of ascite, esophageal varices, and portal thrombosis were evaluated at admission and on every visit.RESULTS: At least one etiological factor was determined in 54 (72%) of the patients. The etiology could not be defined in 21 (28%) patients. One etiological factor was found in 39, 2 factors in 14 and 3 factors in 1 patient.The most common cause was the web (16%), the second was Hydatid disease (11%), the third was Behcet's disease (9%). Portal vein thrombosis was present in 11 patients and at least one etiology was identified in 9 of them (82%).CONCLUSION: Behcet's disease and hydatid disease are more prominent etiological factors in Turkey than in other countries. Patients with web have an excellent response to treatment without signs of portal vein thrombosis while patients having thrombofilic factors more than one are prone to develop portal vein thrombosis with worse clinical outcome.

  6. Isolation and culture of umbilical vein mesenchymal stem cells

    OpenAIRE

    D.T. Covas; J.L.C. Siufi; A.R.L. Silva; M. D. Orellana

    2003-01-01

    Bone marrow contains a population of stem cells that can support hematopoiesis and can differentiate into different cell lines including adipocytes, osteocytes, chondrocytes, myocytes, astrocytes, and tenocytes. These cells have been denoted mesenchymal stem cells. In the present study we isolated a cell population derived from the endothelium and subendothelium of the umbilical cord vein which possesses morphological, immunophenotypical and cell differentiation characteristics similar to tho...

  7. How do we know who has had deep vein thrombosis?

    OpenAIRE

    Sandler, D A; Mitchell, J R

    1989-01-01

    An attempt was made to identify all patients diagnosed as having deep vein thrombosis (DVT) in a large teaching hospital during one year. A review of the radiology records showed that 124 (81%) of the 154 venograms performed were for suspected DVT, and that the diagnosis was confirmed in 57 (46%). During the same period, the Hospital Activity Analysis (HAA) records revealed 174 episodes classified as 'phlebitis or thrombophlebitis' in 162 patients. Only 37 of these episodes (21%) had been con...

  8. Renal vein thrombosis mimicking urinary calculus: a dilemma of diagnosis

    OpenAIRE

    Wang, Yimin; Chen, Shanwen; Wang, Wei; Liu, Jianyong; JIN, BAIYE

    2015-01-01

    Background Renal vein thrombosis (RVT) with flank pain, and hematuria, is often mistaken with renal colic originating from ureteric or renal calculus. Especially in young and otherwise healthy patients, clinicians are easily misled by clinical presentation and calcified RVT. Case presentation A 38-year-old woman presented with flank pain and hematuria suggestive of renal calculus on ultrasound. She underwent extracorporeal shock wave lithotripsy that failed, leading to the recommendation that...

  9. Evaluating the Electrification of Vehicle Fleets Using the Veins Framework

    OpenAIRE

    Schellenberg, Sebastian; Berndt, Rüdiger; German, Reinhard; Eckhoff, David

    2014-01-01

    The case study discussed in this paper involves a company maintaining a vehicle fleet of one hundred vehicles. In this article we will discuss how we extend and deploy the Veins framework, which couples OMNeT++ and SUMO, to help in the process of electrifying this vehicle fleet, i.e., replacing combustion engine cars with electric vehicles to save money and lower CO$_2$ emissions.

  10. Bilateral Central Vein Occlusion in a Case of Diaphragmatic Eventration

    OpenAIRE

    STER, Anda-Maria; Stan, Cristina; GHERVAN, Mihaela

    2014-01-01

    Central Retinal Vein Occlusion (CRVO) is a severe retinal pathology, which causes visual impairment usually after the age of 40. Mostly unilateral, less than 10% of cases are bilateral. Affected young adults (under the age of 40), usually exhibit a hidden, underlying systemic disease. Thorough testing has to be done in order to spot the pathogenic agent. We present the case of a 25 years old woman with bilateral CRVO caused by Diaphragmatic Eventration and Chronic Respiratory Failure.

  11. Bilateral central vein occlusion in a case of diaphragmatic eventration.

    Science.gov (United States)

    Ster, Anda-Maria; Stan, Cristina; Ghervan, Mihaela

    2014-09-01

    Central Retinal Vein Occlusion (CRVO) is a severe retinal pathology, which causes visual impairment usually after the age of 40. Mostly unilateral, less than 10% of cases are bilateral. Affected young adults (under the age of 40), usually exhibit a hidden, underlying systemic disease. Thorough testing has to be done in order to spot the pathogenic agent. We present the case of a 25 years old woman with bilateral CRVO caused by Diaphragmatic Eventration and Chronic Respiratory Failure. PMID:25705293

  12. Spontaneous massive haemothorax caused by rupture of an intercostal vein

    OpenAIRE

    Ke, H‐Y; Lee, S‐C; Tzao, C; H. Chang; Liao, G‐S; Cheng, Y‐L

    2006-01-01

    Spontaneous massive haemothorax is rare. We describe a healthy 44 year old woman who experience sudden onset chest pain while sleeping. Chest radiograph revealed massive right pleural effusion. Progressive dyspnoea, cold sweating, and tachycardia developed later. A tube thoracostomy was performed immediately and massive haemothorax was noted. An emergency thoracotomy was performed because of unstable vital signs. Disruption of the right third intercostal vein with continuous bleeding was obse...

  13. Therapeutic potential of intravitreal pharmacotherapy in retinal vein occlusion

    OpenAIRE

    2012-01-01

    Retinal vein occlusion (RVO) is the most common visually disabling disease affecting the retina after diabetic retinopathy. Although the disease entity has long been known, its management is still controversial. Macular edema is the main reason for decreased visual acuity (VA) in this retinal vascular disorder. Recently the vitreous cavity has increasingly been used as a reservoir of drugs for the direct treatment of macular edema through intravitreal injection route. The most widely injected...

  14. Multiple extra macular branch retinal vein occlusions in hyperhomocysteinemia

    Directory of Open Access Journals (Sweden)

    Abhijit Diwakar Gore

    2014-01-01

    Full Text Available Hyperhomocysteinemia is a well-known modifiable risk factor for thromboembolism. Retinal vascular occlusion in patients having hyperhomocysteinemia is a known entity, particularly in young patients. However, multiple extra macular branch retinal vein occlusion (BRVO is a rare condition, which can be a presentation of this disease. We present a patient who had multiple extra macular BRVO; on complete systemic workup, he was found to have raised homocysteine levels.

  15. Fabrication of subcutaneous veins phantom for vessel visualization system

    Science.gov (United States)

    Cheng, Kai; Narita, Kazuyuki; Morita, Yusuke; Nakamachi, Eiji; Honda, Norihiro; Awazu, Kunio

    2013-09-01

    The technique of subcutaneous veins imaging by using NIR (Near Infrared Radiation) is widely used in medical applications, such as the intravenous injection and the blood sampling. In the previous study, an automatic 3D blood vessel search and automatic blood sampling system was newly developed. In order to validate this NIR imaging system, we adopted the subcutaneous vein in the human arm and its artificial phantom, which imitate the human fat and blood vessel. The human skin and subcutaneous vein is characterized as the uncertainty object, which has the individual specificity, non-accurate depth information, non-steady state and hardly to be fixed in the examination apparatus. On the other hand, the conventional phantom was quite distinct from the human's characteristics, such as the non-multilayer structure, disagreement of optical property. In this study, we develop a multilayer phantom, which is quite similar with human skin, for improvement of NIR detection system evaluation. The phantom consists of three layers, such as the epidermis layer, the dermis layer and the subcutaneous fat layer. In subcutaneous fat layer, we built a blood vessel. We use the intralipid to imitate the optical scattering characteristics of human skin, and the hemoglobin and melanin for the optical absorption characteristics. In this study, we did two subjects. First, we decide the fabrication process of the phantom. Second, we compared newly developed phantoms with human skin by using our NIR detecting system, and confirm the availability of these phantoms.

  16. Natural fracking and the genesis of five-element veins

    Science.gov (United States)

    Markl, Gregor; Burisch, Mathias; Neumann, Udo

    2016-05-01

    Hydrothermal Ag-Co-Ni-Bi-As (five-element vein type) ore deposits show very conspicuous textures of the native elements silver, bismuth, and arsenic indicating formation from a rapid, far-from-equilibrium process. Such textures include up to dm-large tree- and wire-like aggregates overgrown by Co-Ni-Fe arsenides and mostly carbonates. Despite the historical and contemporary importance of five-element vein type deposits as sources of silver, bismuth, and cobalt, and despite of spectacular museum specimens, their process of formation is not yet understood and has been a matter of debate since centuries. We propose, based on observations from a number of classical European five-element vein deposits and carbon isotope analyses, that "natural fracking," i.e., liberation of hydrocarbons or hydrocarbon-bearing fluids during break up of rocks in the vicinity of an active hydrothermal system and mixing between these hydrocarbons (e.g., methane and/or methane-bearing fluids) and a metal-rich hydrothermal fluid is responsible for ore precipitation and the formation of the unusual ore textures and assemblages. Thermodynamic and isotope mixing calculations show that the textural, chemical, and isotopic features of the investigated deposits can entirely be explained by this mechanism.

  17. The inferior cochlear vein: surgical aspects in cochlear implantation.

    Science.gov (United States)

    Guo, Rui; Zhang, HongLei; Chen, Wei; Zhu, XiaoQuan; Liu, Wei; Rask-Andersen, Helge

    2016-02-01

    The patency of the inferior cochlear vein (ICV) may be challenged in cochlear implantation (CI) due to its location near the round window (RW). This may be essential to consider during selection of different trajectories for electrode insertion aiming at preserving residual hearing. Venous blood from the human cochlea is drained through the ICV. The vein also drains blood from the modiolus containing the spiral ganglion neurons. Surgical interference with this vein could cause neural damage influencing CI outcome. We analyzed the topographical relationship between the RW and ICV bony channel and cochlear aqueduct (CA) from a surgical standpoint. Archival human temporal bones were further microdissected to visualize the CA and its accessory canals (AC1 and AC2). This was combined with examinations of plastic and silicone molds of the human labyrinth. Metric analyses were made using photo stereomicroscopy documenting the proximal portion of the AC1, the internal aperture of the CA and the RW. The mean distance between the AC1 and the anterior rim of the RW was 0.81 mm in bone specimens and 0.67 mm assessed in corrosion casts. The AC1 runs from the floor of the scala tympani through the otic capsule passing parallel to the CA to the posterior cranial fossa. The mean distance between the CA and AC1 canal was 0.31 and 0.25 mm, respectively. PMID:25700831

  18. Analysis of the hand vein pattern for people recognition

    Science.gov (United States)

    Castro-Ortega, R.; Toxqui-Quitl, C.; Cristóbal, G.; Marcos, J. Victor; Padilla-Vivanco, A.; Hurtado Pérez, R.

    2015-09-01

    The shape of the hand vascular pattern contains useful and unique features that can be used for identifying and authenticating people, with applications in access control, medicine and financial services. In this work, an optical system for the image acquisition of the hand vascular pattern is implemented. It consists of a CCD camera with sensitivity in the IR and a light source with emission in the 880 nm. The IR radiation interacts with the desoxyhemoglobin, hemoglobin and water present in the blood of the veins, making possible to see the vein pattern underneath skin. The segmentation of the Region Of Interest (ROI) is achieved using geometrical moments locating the centroid of an image. For enhancement of the vein pattern we use the technique of Histogram Equalization and Contrast Limited Adaptive Histogram Equalization (CLAHE). In order to remove unnecessary information such as body hair and skinfolds, a low pass filter is implemented. A method based on geometric moments is used to obtain the invariant descriptors of the input images. The classification task is achieved using Artificial Neural Networks (ANN) and K-Nearest Neighbors (K-nn) algorithms. Experimental results using our database show a percentage of correct classification, higher of 86.36% with ANN for 912 images of 38 people with 12 versions each one.

  19. Treatment of macular edema due to retinal vein occlusions

    Directory of Open Access Journals (Sweden)

    Channa R

    2011-05-01

    Full Text Available Roomasa Channa, Michael Smith, Peter A CampochiaroDepartments of Ophthalmology and Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD, USA Abstract: Retinal vein occlusion (RVO is a prevalent retinal vascular disease, second only to diabetic retinopathy. Previously there was no treatment for central retinal vein occlusion (CRVO and patients were simply observed for the development of severe complications, generally resulting in poor visual outcomes. The only treatment for branch vein occlusion (BRVO was grid laser photocoagulation, which reduces edema very slowly and provides benefit in some, but not all patients. Within the past year, clinical trials have demonstrated the effects of three new pharmacologic treatments, ranibizumab, triamcinolone acetonide, and dexamethasone implants. The benefit/risk ratio is best for intraocular injections of ranibizumab, making this first-line therapy for most patients with CRVO or BRVO, while intraocular steroids are likely to play adjunctive roles. Standard care for patients with RVO has changed and will continue to evolve as results with other new agents are revealed.Keywords: vascular endothelial growth factor, triamcinolone acetonide, dexamethosone implant, sustained release, vascular leakage, ischemia

  20. Bioaccumulation of ergovaline in bovine lateral saphenous veins in vitro.

    Science.gov (United States)

    Klotz, J L; Kirch, B H; Aiken, G E; Bush, L P; Strickland, J R

    2009-07-01

    Ergot alkaloids have been associated with vasoconstriction in grazing livestock affected by the fescue toxicosis syndrome. Previous in vitro investigations studying how ergot alkaloids caused vasoconstriction have shown that ergovaline has a distinct receptor affinity and sustained contractile response. A similar contractile response has not been noted for lysergic acid. The objectives of this study were to determine if repetitive in vitro exposure of bovine lateral saphenous vein to lysergic acid or ergovaline would result in an increasing contractile response and if a measurable bioaccumulation of the alkaloids in the vascular tissue occurs over time. Segments of vein were surgically biopsied from healthy, Angus x Brangus cross-bred, fescue-naïve yearling heifers (n = 16) or collected from healthy mixed breed and sex cattle immediately after slaughter (n = 12) at a local abattoir. Veins were trimmed of excess fat and connective tissue, sliced into cross-sections, and suspended in a myograph chamber containing 5 mL of oxygenated Krebs-Henseleit buffer (95% O(2)/5% CO(2); pH = 7.4; 37 degrees C). Contractile responses to repetitive additions of ergovaline (1 x 10(-9) and 1 x 10(-7) M) and lysergic acid (1 x 10(-5) and 1 x 10(-4) M) were evaluated using the biopsied veins. For the bioaccumulation experiments, veins collected at the abattoir underwent repetitive additions of 1 x 10(-7) M ergovaline and 1 x 10(-5) M lysergic acid and the segments were removed after every 2 additions and media rinses for alkaloid quantification via HPLC/mass spectrometry. Contractile data were normalized as a percentage of contractile response induced by a reference dose of norepinephrine (1 x 10(-4) M). Repetitive additions of 1 x 10(-9) M ergovaline and 1 x 10(-5) and 1 x 10(-4) M lysergic acid resulted in contractile response with a negative slope (P < 0.02). In contrast, repetitive addition of 1 x 10(-7) M ergovaline resulted in a contractile response that increased with each

  1. Embolization of Incompetent Pelvic Veins for the Treatment of Recurrent Varicose Veins in Lower Limbs and Pelvic Congestion Syndrome

    International Nuclear Information System (INIS)

    We present our experience with embolization of incompetent pelvic veins (IPV) in women with recurrence of varicose veins (VV) in lower limbs, as well as symptoms of pelvic congestion syndrome (PCS), after first surgery. In addition, we evaluated the effects of embolization in decreasing the symptoms of VV before surgery as well as its effects on PCS symptoms. We included 10 women who had consulted a vascular surgeon because of recurrent VV in lower limbs after surgery. All of these patients were included in the study because they also had symptoms of PCS, probably due to IPV. In patients who had confirmed IPV, we performed embolization before a second surgery. VV and PCS were assessed before and at 3 months after embolization (before the second surgery) using a venous clinical severity score (VCSS) and a visual analog pain scale (VAS), respectively. Patients were controlled between 3 and 6 months after embolization. Paired Student t test analysis was used for comparing data before and after embolization. Fifteen vein segments in 10 women were suitable for embolization. There was a significant (p < 0.001) decrease of VCSS after embolization, and recurrence of VV was not detected within a period of 6 months. There was also significant (p < 0.01) relief of chronic pelvic pain related to PCS evaluated using VAS at 3 months after embolization. Embolization decreases the risk of VV recurrence after surgery and also improves PCS symptoms in women with VV in lower limbs and IPV.

  2. Embolization of Incompetent Pelvic Veins for the Treatment of Recurrent Varicose Veins in Lower Limbs and Pelvic Congestion Syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Meneses, Luis, E-mail: lmeneseq@gmail.com; Fava, Mario; Diaz, Pia; Andia, Marcelo [Pontificia Universidad Catolica de Chile, Radiology Department and Biomedical Imaging Center (Chile); Tejos, Cristian; Irarrazabal, Pablo [Pontificia Universidad Catolica de Chile, Biomedical Imaging Center (Chile); Uribe, Sergio, E-mail: suribe@med.puc.cl [Pontificia Universidad Catolica de Chile, Radiology Department and Biomedical Imaging Center (Chile)

    2013-02-15

    We present our experience with embolization of incompetent pelvic veins (IPV) in women with recurrence of varicose veins (VV) in lower limbs, as well as symptoms of pelvic congestion syndrome (PCS), after first surgery. In addition, we evaluated the effects of embolization in decreasing the symptoms of VV before surgery as well as its effects on PCS symptoms. We included 10 women who had consulted a vascular surgeon because of recurrent VV in lower limbs after surgery. All of these patients were included in the study because they also had symptoms of PCS, probably due to IPV. In patients who had confirmed IPV, we performed embolization before a second surgery. VV and PCS were assessed before and at 3 months after embolization (before the second surgery) using a venous clinical severity score (VCSS) and a visual analog pain scale (VAS), respectively. Patients were controlled between 3 and 6 months after embolization. Paired Student t test analysis was used for comparing data before and after embolization. Fifteen vein segments in 10 women were suitable for embolization. There was a significant (p < 0.001) decrease of VCSS after embolization, and recurrence of VV was not detected within a period of 6 months. There was also significant (p < 0.01) relief of chronic pelvic pain related to PCS evaluated using VAS at 3 months after embolization. Embolization decreases the risk of VV recurrence after surgery and also improves PCS symptoms in women with VV in lower limbs and IPV.

  3. Influence of thrombophlebitis on TGF-β1 and its signaling pathway in the vein wall

    Directory of Open Access Journals (Sweden)

    Radoslaw Kowalewski

    2010-04-01

    Full Text Available Extensive extracellular matrix remodeling of the vein wall is involved in varicose veins pathogenesis. Thisprocess is controlled by numerous factors, including peptide growth factors. The aim of the study was to evaluate influenceof thrombophlebitis on TGF-β1 and its signaling pathway in the vein wall. TGF-β1 mRNAlevels, growth factor content andits expression were evaluated by RT-PCR, ELISA, and western blot methods, respectively, in the walls of normal veins, varicoseveins and varicose veins complicated by thrombophlebitis. Western blot analysis was used to assess TGF-β receptortype II (TGF-β RII and p-Smad2/3 protein expression in the investigated material. Unchanged mRNA levels of TGF-β1,decreased TGF-β1 content, as well as decreased expression of latent and active forms of TGF-β1 were found in varicoseveins. Increased expression of TGF-β RII and p-Smad2/3 were found in varicose veins. Thrombophlebitis led to increasedprotein expression of the TGF-β1 active form and p-Smad2/3 in the vein wall compared to varicose veins. TGF-β1 may playa role in the disease pathogenesis because of increased expression and activation of its receptor in the wall of varicose veins.Thrombophlebitis accelerates activation of TGF-β1 and activity of its receptor in the varicose vein wall.

  4. Decreased PGE₂ content reduces MMP-1 activity and consequently increases collagen density in human varicose vein.

    Directory of Open Access Journals (Sweden)

    Ingrid Gomez

    Full Text Available Varicose veins are elongated and dilated saphenous veins. Despite the high prevalence of this disease, its pathogenesis remains unclear.In this study, we investigated the control of matrix metalloproteinases (MMPs expression by prostaglandin (PGE₂ during the vascular wall remodeling of human varicose veins.Varicose (small (SDv and large diameter (LDv and healthy saphenous veins (SV were obtained after surgery. Microsomal and cytosolic PGE-synthases (mPGES and cPGES protein and mRNA responsible for PGE₂ metabolism were analyzed in all veins. cPGES protein was absent while its mRNA was weakly expressed. mPGES-2 expression was similar in the different saphenous veins. mPGES-1 mRNA and protein were detected in healthy veins and a significant decrease was found in LDv. Additionally, 15-hydroxyprostaglandin dehydrogenase (15-PGDH, responsible for PGE₂ degradation, was over-expressed in varicose veins. These variations in mPGES-1 and 15-PGDH density account for the decreased PGE₂ level observed in varicose veins. Furthermore, a significant decrease in PGE₂ receptor (EP4 levels was also found in SDv and LDv. Active MMP-1 and total MMP-2 concentrations were significantly decreased in varicose veins while the tissue inhibitors of metalloproteinases (TIMP -1 and -2, were significantly increased, probably explaining the increased collagen content found in LDv. Finally, the MMP/TIMP ratio is restored by exogenous PGE₂ in varicose veins and reduced in presence of an EP4 receptor antagonist in healthy veins.In conclusion, PGE₂ could be responsible for the vascular wall thickening in human varicose veins. This mechanism could be protective, strengthening the vascular wall in order to counteract venous stasis.

  5. C-reactive protein may be a prognostic factor in hepatocellular carcinoma with malignant portal vein invasion

    OpenAIRE

    Kim, Jong Man; Kwon, Choon Hyuck David; Joh, Jae-Won; Ko, Justin Sangwook; Park, Jae Berm; Lee, Joon Hyeok; Kim, Sung Joo; Paik, Seung Woon; Park, Cheol-Keun

    2013-01-01

    Background Hepatocellular carcinoma (HCC) has a high predilection for portal vein invasion, and the prognosis of HCC with malignant portal vein invasion is extremely poor. The objective of this study was to investigate the outcomes and the prognostic factor of recurrence in HCC patients with malignant portal vein invasion. Methods We retrospectively reviewed the clinicopathologic data and outcomes of 83 HCC patients with malignant portal vein invasion and 1,056 patients without portal vein in...

  6. Ultrastructure of dragonfly wing veins: composite structure of fibrous material supplemented by resilin.

    Science.gov (United States)

    Appel, Esther; Heepe, Lars; Lin, Chung-Ping; Gorb, Stanislav N

    2015-10-01

    Dragonflies count among the most skilful of the flying insects. Their exceptional aerodynamic performance has been the subject of various studies. Morphological and kinematic investigations have showed that dragonfly wings, though being rather stiff, are able to undergo passive deformation during flight, thereby improving the aerodynamic performance. Resilin, a rubber-like protein, has been suggested to be a key component in insect wing flexibility and deformation in response to aerodynamic loads, and has been reported in various arthropod locomotor systems. It has already been found in wing vein joints, connecting longitudinal veins to cross veins, and was shown to endow the dragonfly wing with chordwise flexibility, thereby most likely influencing the dragonfly's flight performance. The present study revealed that resilin is not only present in wing vein joints, but also in the internal cuticle layers of veins in wings of Sympetrum vulgatum (SV) and Matrona basilaris basilaris (MBB). Combined with other structural features of wing veins, such as number and thickness of cuticle layers, material composition, and cross-sectional shape, resilin most probably has an effect on the vein's material properties and the degree of elastic deformations. In order to elucidate the wing vein ultrastructure and the exact localisation of resilin in the internal layers of the vein cuticle, the approaches of bright-field light microscopy, wide-field fluorescence microscopy, confocal laser-scanning microscopy, scanning electron microscopy and transmission electron microscopy were combined. Wing veins were shown to consist of up to six different cuticle layers and a single row of underlying epidermal cells. In wing veins of MBB, the latter are densely packed with light-scattering spheres, previously shown to produce structural colours in the form of quasiordered arrays. Longitudinal and cross veins differ significantly in relative thickness of exo- and endocuticle, with cross veins

  7. Portal Vein Thrombosis After Laparoscopic Splenectomy: An Ongoing Clinical Challenge

    Science.gov (United States)

    Miniati, Douglas N.; Padidar, Arash M.; Kee, Stephen T.; Krummel, Thomas M.

    2005-01-01

    Objectives: Portal vein thrombosis (PVT) following open splenectomy is a potentially lethal complication with an incidence of up to 6%. The objective of this report is to describe our management of a recent laparoscopic case, discuss current therapies, and consider antiplatelet therapy for prophylaxis. Methods: Medical records, laboratory studies, and imaging studies pertaining to a recent case of a laparoscopic splenectomy were examined. Current literature related to this topic was reviewed. Results: A 16-year-old girl underwent laparoscopic splenectomy for idiopathic thrombocytopenic purpura. Her preoperative platelet count was 96K. She was discharged on postoperative day 1 after an uneventful operation including division of the splenic hilum with an endoscopic linear stapler. On postoperative day 20, she presented with a 5-day history of epigastric pain, nausea, and low-grade fevers without peritoneal signs. Her white blood cell count was 17.3; her platelets were 476K. Computed tomography demonstrated thrombosis of the splenic, superior mesenteric, and portal veins propagating into the liver. Heparinization was begun followed by an unsuccessful attempt at pharmacologic and mechanical thrombolysis by interventional radiology. Over the next 5 days, her pain resolved, she tolerated a full diet, was converted to oral anticoagulation and sent home. Follow-up radiographic studies demonstrated the development of venous collaterals and cavernous transformation of the portal vein. Discussion: No standard therapy for PVT exists; several approaches have been described. These include systemic anticoagulation, systemic or regional medical thrombolysis, mechanical thrombolysis, and surgical thrombectomy. Unanswered questions exist about the most effective acute therapy, duration of anticoagulation, and the potential efficacy of routine prophylaxis with perioperative antiplatelet agents. PVT following splenectomy occurs with both the open and laparoscopic approach. PMID

  8. Rule-based model of vein graft remodeling.

    Directory of Open Access Journals (Sweden)

    Minki Hwang

    Full Text Available When vein segments are implanted into the arterial system for use in arterial bypass grafting, adaptation to the higher pressure and flow of the arterial system is accomplished thorough wall thickening and expansion. These early remodeling events have been found to be closely coupled to the local hemodynamic forces, such as shear stress and wall tension, and are believed to be the foundation for later vein graft failure. To further our mechanistic understanding of the cellular and extracellular interactions that lead to global changes in tissue architecture, a rule-based modeling method is developed through the application of basic rules of behaviors for these molecular and cellular activities. In the current method, smooth muscle cell (SMC, extracellular matrix (ECM, and monocytes are selected as the three components that occupy the elements of a grid system that comprise the developing vein graft intima. The probabilities of the cellular behaviors are developed based on data extracted from in vivo experiments. At each time step, the various probabilities are computed and applied to the SMC and ECM elements to determine their next physical state and behavior. One- and two-dimensional models are developed to test and validate the computational approach. The importance of monocyte infiltration, and the associated effect in augmenting extracellular matrix deposition, was evaluated and found to be an important component in model development. Final model validation is performed using an independent set of experiments, where model predictions of intimal growth are evaluated against experimental data obtained from the complex geometry and shear stress patterns offered by a mid-graft focal stenosis, where simulation results show good agreements with the experimental data.

  9. Percutaneous Access via the Recanalized Paraumbilical Vein for Varix Embolization in Seven Patients

    Energy Technology Data Exchange (ETDEWEB)

    Cho, Yeon Jin; Kim, Hyo Cheol; Hur, Sae Beom; Jae, Hwan Jun; Chung, Jin Wook [Dept. of Radiology, Seoul National University College of Medicine, Seoul National University Hospital, Seoul (Korea, Republic of); Kim, Young Whan [Dept. of Radiology, Dongsan Hospital, Keimyung University College of Medicine, Daegu (Korea, Republic of)

    2014-10-15

    To evaluate the feasibility of percutaneous access via the recanalized paraumbilical vein for varix embolization. Between July 2008 and Jan 2014, percutaneous access via the recanalized paraumbilical vein for varix embolization was attempted in seven patients with variceal bleeding. Paraumbilical vein puncture was performed under ultrasonographic guidance, followed by introduction of a 5-Fr sheath. We retrospectively evaluated the technical feasibility, procedure-related complications, and clinical outcomes of each patient. Recanalized paraumbilical vein catheterization was performed successfully in all patients. Gastroesophageal varix embolization was performed in six patients, and umbilical varix embolization was performed in one patient. Embolic materials used are N-butyl cyanoacrylate (n = 6) and coil with N-butyl cyanoacrylate (n = 1). There were no procedure-related complications. One patient underwent repeated variceal embolization 6 hours after initial procedure via recanalized paraumbilical vein, due to rebleeding from gastric varix. Percutaneous access via the paraumbilical vein for varix embolization is a simple alternative in patients with portal hypertension.

  10. Postoperative Massive Pulmonary Embolism Due to Superficial Vein Thrombosis of the Upper Limb

    Science.gov (United States)

    Cascella, Marco; Viscardi, Daniela; Bifulco, Francesca; Cuomo, Arturo

    2016-01-01

    It is well known that deep vein thrombosis of the upper extremities is linked to high morbidity/mortality, resulting in 12-20% of all documented pulmonary embolism; however, there are few data about thromboembolism originating from a vein and/or a branch of a superficial vein of the upper extremities. Pulmonary embolism secondary to upper limb superficial vein thrombosis (not combined with upper extremities deep vein thrombosis) is a very rare clinical manifestation with few cases reported in the literature. We report a rare case of thrombophlebitis in departure from a superficial branch of the cephalic vein of the right arm, complicated by cardiac arrest secondary to a massive pulmonary embolism in a patient who underwent major surgery for ovarian cancer. We discuss on the numerous thrombotic risk factors, triggering a cascade of reactions and resulting in a potential fatal clinical manifestation. PMID:26985256

  11. Atresia of the bilateral pulmonary veins: a rare and dismal anomaly identified on cardiac CT

    Energy Technology Data Exchange (ETDEWEB)

    Goo, Hyun Woo; Park, Sang-Hyub; Koo, Hyun Jung; Cho, Young Hoon; Lee, Eunsol [University of Ulsan College of Medicine, Asan Medical Center, Department of Radiology and Research Institute of Radiology, Seoul (Korea, Republic of)

    2014-08-15

    Imaging findings of bilateral pulmonary vein atresia have not been described. To describe cardiac CT findings and clinical outcomes of bilateral pulmonary vein atresia. Three newborns with bilateral pulmonary vein atresia were encountered at our institution during a period of 8 years. We evaluated prenatal echocardiographic findings, clinical presentations, postnatal echocardiographic findings, chest radiographic findings, cardiac CT findings and clinical outcomes. All newborns presented immediately after birth with severe cyanosis, respiratory distress and acidosis that were unresponsive to medical management. Prenatal and postnatal echocardiographic studies and chest radiography were misleading, inconclusive or nonspecific in making the diagnosis in these children; however cardiac CT clearly demonstrated atresia of the bilateral pulmonary veins with multiple small mediastinal collateral veins and pulmonary edema. Surgical treatments were not feasible for this anomaly. Their clinical outcomes were universally dismal and all infants died within 3 days. Cardiac CT provides an accurate diagnosis of bilateral pulmonary vein atresia and leads to prompt treatment decision in these children. (orig.)

  12. Case report: Varicosity of the communicating vein between the left renal vein and the left ascending lumbar vein mimicking a renal artery aneurysm: Report of an unusual site of varicose veins and a novel hypothesis to explain its association with abdominal pain

    Directory of Open Access Journals (Sweden)

    Sandeep G Jakhere

    2011-01-01

    Full Text Available A communicating vein between the left renal vein and the left ascending lumbar vein has only rarely been reported in the imaging literature. There are very few reports of varicosity of this communicating vein. Nonetheless, awareness about this communicating vein is of utmost importance for surgeons performing aortoiliac surgeries and nephrectomies as it may pose technical difficulties during surgery or cause life-threatening retroperitoneal hemorrhage. Varicosity of this venous channel may be mistaken for paraaortic lymphadenopathy, adrenal pseudo-mass, or renal artery aneurysm. We report a case of a patient with varicosity of this communicating vein, which mimicked a left renal artery aneurysm. A novel hypothesis is also proposed to explain the relationship with abdominal pain.

  13. Septic thrombosis of the portal vein due to peripancreatic ligamental abscess

    International Nuclear Information System (INIS)

    Septic thrombus formation of both the main portal vein and its intrahepatic branches were observed on CT in a patient with peripancreatic abscess. The septic thrombosis of portal vein (STPV) extended from the level of porta hepatis into the intrahepatic branches, but the portal vein and superior mesenteric vein at the level of pancreatic head were preserved with no evidence of thrombosis angiographically. The gas-containing abscess near the head of the pancreas extended toward the hepatic hilum and surrounded the portal vein and its branches on CT. It was concluded that these thrombi of portal vein branches at porta hepatis and intrahepatic branches were caused by extensions of peripancreatic abscess via the hepatoduodenal ligament and ligamentum teres. Computed tomography was useful in depicting the ligamentous spread of peripancreatic abscess resulting in STPV. (orig.) (orig.)

  14. Septic thrombosis of the portal vein due to peripancreatic ligamental abscess

    Energy Technology Data Exchange (ETDEWEB)

    Wakisaka, M.; Mori, H.; Kiyosue, H. [Dept. of Radiology, Oita Medical Univ. (Japan); Kamegawa, T. [Dept. of Surgery, Nankai Hospital (Japan); Uragami, S. [Dept. of Internal Medicine, Nankai Hospital, Saiki (Japan)

    1999-02-01

    Septic thrombus formation of both the main portal vein and its intrahepatic branches were observed on CT in a patient with peripancreatic abscess. The septic thrombosis of portal vein (STPV) extended from the level of porta hepatis into the intrahepatic branches, but the portal vein and superior mesenteric vein at the level of pancreatic head were preserved with no evidence of thrombosis angiographically. The gas-containing abscess near the head of the pancreas extended toward the hepatic hilum and surrounded the portal vein and its branches on CT. It was concluded that these thrombi of portal vein branches at porta hepatis and intrahepatic branches were caused by extensions of peripancreatic abscess via the hepatoduodenal ligament and ligamentum teres. Computed tomography was useful in depicting the ligamentous spread of peripancreatic abscess resulting in STPV. (orig.) (orig.) With 2 figs., 6 refs.

  15. A Novel Biometric system for Person Recognition Using Palm vein Images

    Directory of Open Access Journals (Sweden)

    S.Manikanda prabu

    2013-08-01

    Full Text Available The palm vein is one of the most reliable physiological characteristics that can be used to distinguish between individuals. In recent years, it receives more attention from the researchers. In this paper, we present a new approach for the personal identification using palm vein images. This paper attempts to improve the performance of palm vein based verification system with the help of energy feature based on wavelet transform. Energy feature can reflect the wavelet energy distribution of all veins at different resolutions, thus it can efficiently characterize palm veins. Since, wavelet is robust to translation, rotation and distortion. It is also insensitive to contrast changes. From our experimental results, it is found that the proposed scheme outperforms well by achieving higher true acceptance rate and lower false acceptance rate simultaneously. It also demonstrates the power of the proposed approach and more accurate identification. In conclusion, the scheme can improve the identification performance of palm vein recognition significantly.

  16. An Unusual Course and Termination of Small Saphenous Vein: A Case Report

    Science.gov (United States)

    Shetty, Prakashchandra; D’Souza, Melanie Rose

    2016-01-01

    The superficial veins of the lower limb can vary in their course and termination. We report a relatively rare type of variation in the course and termination of small saphenous vein. The small saphenous vein had normal origin and course in the leg. However, instead of terminating into the popliteal vein, it continued up in the posterior compartment of the thigh and terminated into the femoral vein after piercing the fleshy part of the adductor magnus muscle. This course might lead to varicosity of the small saphenous vein due to the compression by the fleshy fibres of adductor magus near its termination. The case may be of interest to general and plastic surgeons and even cardiothoracic surgeons. PMID:27134850

  17. Atresia of the bilateral pulmonary veins: a rare and dismal anomaly identified on cardiac CT

    International Nuclear Information System (INIS)

    Imaging findings of bilateral pulmonary vein atresia have not been described. To describe cardiac CT findings and clinical outcomes of bilateral pulmonary vein atresia. Three newborns with bilateral pulmonary vein atresia were encountered at our institution during a period of 8 years. We evaluated prenatal echocardiographic findings, clinical presentations, postnatal echocardiographic findings, chest radiographic findings, cardiac CT findings and clinical outcomes. All newborns presented immediately after birth with severe cyanosis, respiratory distress and acidosis that were unresponsive to medical management. Prenatal and postnatal echocardiographic studies and chest radiography were misleading, inconclusive or nonspecific in making the diagnosis in these children; however cardiac CT clearly demonstrated atresia of the bilateral pulmonary veins with multiple small mediastinal collateral veins and pulmonary edema. Surgical treatments were not feasible for this anomaly. Their clinical outcomes were universally dismal and all infants died within 3 days. Cardiac CT provides an accurate diagnosis of bilateral pulmonary vein atresia and leads to prompt treatment decision in these children. (orig.)

  18. Levoatriocardinal vein with normal intracardiac anatomy and pulmonary venous return

    Directory of Open Access Journals (Sweden)

    Ender Odemis

    2011-01-01

    Full Text Available Levoatriocardinal vein (LACV is characterized by an abnormal connection between pulmonary and systemic venous return. This extremely rare cardiac malformation is usually associated with left-sided obstructive lesions including mitral atresia, hypoplastic left-heart syndrome, and abnormal pulmonary venous connection. Patients may have low systemic cardiac output and pulmonary venous obstruction symptoms. In this manuscript, we report a case with LACV and normal pulmonary venous return with absence of any intracardiac pathology. LACV was demonstrated with echocardiography, angiography, and computed tomography. Surgical correction was made successfully.

  19. [Diagnostic strategy in patients with clinically suspected deep vein thrombosis

    DEFF Research Database (Denmark)

    Mantoni, Margit Yvonne; Kristensen, M.; Brogaard, M.H.; Sivertsen, J.C.; Nielsen, Jørn Dalsgaard; Strandberg, C.; Friis, S.

    2008-01-01

    INTRODUCTION: The standard method for diagnosing deep vein thrombosis (DVT) involves determination of D-dimer and ultrasound scanning. In an attempt to reduce the number of ultrasound examinations we have supplemented this with a clinical probability estimate for DVT (DVT-score) over one year....... MATERIALS AND METHODS: A total of 508 consecutive patients presenting in the emergency room with suspected DVT had D-dimer and DVT-score performed. Patients with non-elevated D-dimer and a low or moderate DVT score received no treatment. The remainder had ultrasound scanning from the groin to the popliteal...

  20. Facial vein thrombophlebitis: an uncommon complication of sinusitis

    Energy Technology Data Exchange (ETDEWEB)

    Cotes, Claudia [The University of Texas Medical Branch, Department of Radiology, Galveston, TX (United States); Riascos, Roy [The University of Texas Medical School, Department of Diagnostic and Interventional Imaging, Houston, TX (United States); Swischuk, Leonard E. [The University of Texas Medical Branch, Department of Pediatrics and Pediatric Radiology, Galveston, TX (United States)

    2015-08-15

    Facial vein thrombophlebitis is an uncommon complication of sinusitis. In cases where periorbital swelling complicating sinusitis is diagnosed, clinical findings of swelling and erythema extending beyond the orbital region into the cheek should alert the physician about this unusual complication and the need for further contrast-enhanced imaging and venography. The radiologist must be particularly careful in the evaluation of vascular structures of the face and neck in these children. CT and MRI with contrast material and MR venography are studies that clearly demonstrate the vascular anatomy and possible complications. However, MR venography confirms flow abnormalities within the venous system with the advantage of avoiding radiation exposure to the pediatric patient. (orig.)

  1. Levoatriocardinal vein with normal intracardiac anatomy and pulmonary venous return

    International Nuclear Information System (INIS)

    Levoatriocardinal vein (LACV) is characterized by an abnormal connection between pulmonary and systemic venous return. This extremely rare cardiac malformation is usually associated with left-sided obstructive lesions including mitral atresia, hypoplastic left-heart syndrome, and abnormal pulmonary venous connection. Patients may have low systemic cardiac output and pulmonary venous obstruction symptoms. In this manuscript, we report a case with LACV and normal pulmonary venous return with absence of any intracardiac pathology. LACV was demonstrated with echocardiography, angiography, and computed tomography. Surgical correction was made successfully

  2. Advances in radiological imaging of the renal arteries and veins

    International Nuclear Information System (INIS)

    Familiarity with the normal anatomy of the renal vessels and common variants is of particular importance for the operator who performs renal transplantation or therapeutic interventions in the renal vessels. Because of the recent major advances in multislice spiral computed tomography angiography (MSCTA) techniques, our ability has been considerably improved to determine the patterns and characters of renal arteries and veins. This article summarizes the research situation and progress in the area of renal vessel imaging anatomy. Some regularity in the distribution of renal vessel positions, dimensions and variations among patients who received MSCTA examinations, and these anatomical measurements are of great value for clinical diagnosis and treatment. (authors)

  3. Low-grade leiomyosarcoma of renal vein: A case report

    Directory of Open Access Journals (Sweden)

    Nalan NEŞE

    2008-01-01

    Full Text Available Leiomyosarcomas originating from renal vein are quite rare malignant tumors since only 30 cases have been reported in the literature. Clinical symptoms which are due to a renal mass along with radiological findings, usually mislead to a preoperative diagnosis of renal cell carcinoma. The correct diagnosis is frequently made on nephrectomy specimens. Low-grade leiomyosarcomas need to be differentiated from leiomyomas. Increased mitotic activity and necrosis are known to be gold standards for differential diagnosis. In this report, we present a case of a 62 year old woman whose tumor in the left kidney diagnosed as low-grade leiomyosarcoma together with a brief review of the literature.

  4. Intra-Arterial Thrombolysis for Deep Vein Thrombosis of the Lower Extremity: Case Report

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Moo Sang; Roh, Byung Suk [Dept. of Radiology, Wonkwang University School of Medicine, Iksan (Korea, Republic of)

    2011-09-15

    If the appropriate catheterization of the affected vein was not possible because of a narrowed or thrombus-filled venous lumen, successful treatment gets into trouble during catheter directed regional thrombolysis for treatment of deep vein thrombosis. In this situation, intra-arterial thrombolysis can be considered as an alternative treatment, but to the best of our knowledge, only two reports have been described. We present here cases of successful intra-arterial thrombolysis in patients with deep vein thrombosis.

  5. A clinical study of thrombectomy and interventional treatment of iliac vein stenosis concomitant with thrombosis

    International Nuclear Information System (INIS)

    Objective: To study the effect of thrombectomy and interventional treatment of iliac vein stenosis concomitant with thrombosis. Methods: We adopt filter placing, thrombectomy, provistionality artery vein fistula and implanted stents and balloon-expansion to treat patients. Results: Symptoms disappeared in 18 patients, were significantly improved in 3 patients. Conclusion: The effect of thrombectomy and interventional treatmen of iliac vein stenosis concomitant with thrombosis is safe and satisfactory. (authors)

  6. Bipolar radiofrequency-induced thermotherapy of great saphenous vein: Our initial experience

    Directory of Open Access Journals (Sweden)

    Venkatesh Kasi

    2012-01-01

    Full Text Available The incidence of varicose veins in lower limbs is increasing in the Indian subcontinent. With the advent of radiofrequency ablation (RFA, an effective minimally invasive technique is now available to treat varicose veins. RFA can be performed with either unipolar or bipolar probes. We present a simple technique for bipolar radiofrequency-induced thermotherapy of the great saphenous vein. This can be a safe and effective alternative to surgical procedures.

  7. Meandering right pulmonary vein associated with severe and progressive "idiopathic-like" pulmonary hypertensive vascular disease.

    Science.gov (United States)

    Cuenca, Sofia; Bret, Montserrat; Del Cerro, Maria Jesus

    2016-03-01

    Congenital anomalies of the pulmonary veins are rare. Meandering right pulmonary vein, considered a part of the Scimitar syndrome spectrum, is often an incidental finding during chest imaging. We present the case of a 4-year-old girl diagnosed with meandering pulmonary vein, who developed pulmonary hypertensive disease with an aggressive course, in spite of absence of hypoxia or elevated pulmonary wedge pressure. PMID:26374461

  8. Reuse of Occluded Veins During Permanent Pacemaker Lead Extraction: A New Indication for Femoral Lead Extraction

    OpenAIRE

    Staniforth, Andrew D; Schilling, Richard J

    2002-01-01

    Objectives: This study examined the utility of a novel technique for reuse of thrombosed veins when extracting permanent pacemaker leads via a femoral vein approach. Background: Although lead extraction permanent pacemaker using a femoral approach has advantages over the subclavian approach, it cannot be used to provide access for a new lead using currently employed techniques. This is important because up to 23% of patients have occluded veins after permanent pacemaker implantation. M...

  9. Inflammatory pseudotumor causing deep vein thrombosis after metal-on-metal hip resurfacing arthroplasty.

    LENUS (Irish Health Repository)

    Memon, Adeel Rasool

    2013-01-01

    Metal-on-metal hip resurfacings have recently been associated with a variety of complications resulting from adverse reaction to metal debris. We report a case of extensive soft tissue necrosis associated with a huge pelvic mass causing extensive deep vein thrombosis of the lower limb secondary to mechanical compression of the iliac vein. This is a rare and unusual cause of deep vein thrombosis after metal-on-metal hip resurfacing arthroplasty.

  10. Palm Vein Recognition with Local Binary Patterns and Local Derivative Patterns

    OpenAIRE

    Mirmohamadsadeghi, Leila; Drygajlo, Andrzej

    2011-01-01

    Palm vein feature extraction from near infrared images is a challenging problem in hand pattern recognition. In this paper, a promising new approach based on local texture patterns is proposed. First, operators and histograms of multi-scale Local Binary Patterns (LBPs) are investigated in order to identify new efficient descriptors for palm vein patterns. Novel higher-order local pattern descriptors based on Local Derivative Pattern (LDP) histograms are then investigated for palm vein descrip...

  11. Use of hand-held Doppler to identify 'difficult' forearm veins for cannulation.

    OpenAIRE

    Whiteley, M. S.; Chang, B Y; Marsh, H. P.; Williams, A.R.; Manton, H. C.; Horrocks, M.

    1995-01-01

    Intravenous cannulation is a necessary procedure in many hospital patients. Some patients are regarded as having 'impossible' veins that are invisible and impalpable despite venous tourniquet. We investigated the use of a hand-held Doppler to identify veins suitable for percutaneous cannulation in such patients. A total of 24 arms in 12 patient volunteers with invisible and impalpable forearm veins was studied by squeezing the ipsilateral hand and using a hand-held 8 MHz Doppler probe on the ...

  12. Umbilical intra-abdominal vein varix: a case report and review of the literature.

    Science.gov (United States)

    Virdis, G; Gulotta, A; Cherchi, C; Spanedda, G; Olzai, M G; Ambrosini, G; Dessole, S; Capobianco, G

    2016-01-01

    Fetal umbilical intra-abdominal vein varix (FIUV) is a rare congenital malformation characterized by focal dilatation of the umbilical vein. The authors report a case of pregnant woman at 32 weeks of gestation with a fetus affected by dilatation of an intra-abdominal portion of the umbilical vein. They performed continuous ultrasound and cardiotocographic monitoring, from admission to the delivery. They describe the case and perform a review of the literature. PMID:27132426

  13. The tromped, a means of prophylaxis for flight related deep vein thrombosis

    OpenAIRE

    Collins, Carolyn, (Thesis)

    2009-01-01

    The process of blood flow in the leg, against gravity and towards the heart is instigated by compression of the veins in the foot. Contraction of the calf muscles results in an ejection volume (EV) of blood towards the heart, completing the process. Research studies have shown an association between flight travel and deep vein thrombosis (DVT). Stasis of blood flow can lead to the development of thrombus formation. Deep Vein Thrombosis occurs in situations where people are immobile for long p...

  14. Transcutaneous Puncture of the Superior Ophthalmic Vein for Embolization of Dural Carotid-Ophthalmic Fistula

    OpenAIRE

    Chen, Wen-Hsien; Tsai, I-Chen; Huang, Hou-Chi; Lin, Chun-Han; Hung, Hao-Chun; Wu, Chen-Hao; Chi-Chang Chen, Clayton

    2008-01-01

    Carotid-ophthalmic fistula is a rare disease, which can be treated by transvenous endovascular embolization. Here, we report a unique case with draining vein thrombosed, making a transvenous approach impossible. An old but valuable technique, direct transcutaneous puncture of the superior ophthalmic vein, was used to save the patient's right eye. The old technique, direct puncture of the superior ophthalmic vein, retains its irreplaceable usefulness in this special situation. Thus, interventi...

  15. Arteriovenous Fistula Complicated by Popliteal Venous Access for Endovascular Thrombolytic Therapy of Deep Vein Thrombosis

    International Nuclear Information System (INIS)

    We report a case of an iatrogenic arteriovenous fistula complicated by catheter- directed thrombolytic therapy in a patient with acute deep vein thrombosis of a lower extremity. To the best of our knowledge, this is the first report of an arteriovenous fistula between the sural artery and popliteal vein in that situation. As the vessels have a close anatomical relationship, the arteriovenous fistula seems to be a potential complication after endovascular thrombolytic therapy of acute deep vein thrombosis

  16. Arteriovenous Fistula Complicated by Popliteal Venous Access for Endovascular Thrombolytic Therapy of Deep Vein Thrombosis

    Energy Technology Data Exchange (ETDEWEB)

    Byun, Sung Su; Kim, Jeong Ho; Park, Chul Hi; Hwang, Hee Young; Kim, Hyung SiK [Gacheon University Gil Medical Center, Gacheon (Korea, Republic of); Jeon, Young Sun; Kim, Won Hong [Inha University College of Medicine, Incheon (Korea, Republic of)

    2008-10-15

    We report a case of an iatrogenic arteriovenous fistula complicated by catheter- directed thrombolytic therapy in a patient with acute deep vein thrombosis of a lower extremity. To the best of our knowledge, this is the first report of an arteriovenous fistula between the sural artery and popliteal vein in that situation. As the vessels have a close anatomical relationship, the arteriovenous fistula seems to be a potential complication after endovascular thrombolytic therapy of acute deep vein thrombosis.

  17. Congenital hepatoportal arteriovenous fistula associated with intrahepatic portal vein aneurysm and portohepatic venous shunt: case report

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Jin Hwa; Shin, Tae Beom; Kang, Myong Jin; Yoon, Seong Kuk; Oh, Jong Young; Choi, Jong Cheol; Park, Byeong Ho; Choi, Sun Seob; Nam, Kyung Jin [College of Medicine, Donga University, Busan (Korea, Republic of)

    2005-08-15

    A congenital hepatoportal arteriovenous fistula associated with an intrahepatic portal vein aneurysm is a rare type of arteriovenous malformation. Only 14 pediatric cases have been reported to the best of the authors' knowledge. An intrahepatic shunt between the portal and systemic veins is also relatively rare. We report a case of a congenital hepatoportal arteriovenous fistula associated with an intrahepatic portal vein aneurysm and a portohepatic venous shunt in a neonate who presented with tachypnea and melena.

  18. Development of intrapericardial portion of the rat cranial caval veins during postnatal ontogenesis

    OpenAIRE

    Gadjieva A. U.; Blinova S.A.

    2014-01-01

    Background. Different compartments of caval veins function under different hemodynamic conditions. Negative pressure in the pericardial cavity during ventricular systole promotes more effective blood filling of both the atria and the intrapericardial portions of caval veins. During the period of embryogenesis the orifice portion of the caval veins undergoes the most comlex changes. Objective. To reveal the peculiarities of structure and morphometric parameters of the intrapericardial portion ...

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

    OpenAIRE

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

    2013-01-01

    Purpose. We report a novel technique which aided recanalization of an occluded portal vein for transjugular intrahepatic portosystemic shunt (TIPS) creation in a patient with symptomatic portal vein thrombosis with cavernous transformation. Some have previously considered cavernous transformation a contraindication to TIPS. Case Presentation. 62-year-old man with chronic pancreatitis, portal vein thrombosis, portal hypertension and recurrent variceal bleeding presents with melena and hemateme...

  20. Upper extremity deep vein thrombosis in a 25 years old apparently healthy man

    OpenAIRE

    Fitsum Habte

    2010-01-01

    This case of upper extremity deep vein thrombosis is selected for case report as it is a rare form of deep vein thrombosis without a very well established treatment modality and prognosis. The objective of this study was to report the outcome of a 25 years old male patient with idiopathic upper extremity deep vein thrombosis treated conservatively with low molecular weight heparin (LMWH) and oral warfarin. The data sources used were patient interview, laboratory and radiology investigation re...

  1. Treatment of failing vein grafts in patients who underwent lower extremity arterial bypass

    OpenAIRE

    Park, Keun-Myoung; Park, Yang Jin; Yang, Shin-Seok; Kim, Dong-Ik; Kim, Young-Wook

    2012-01-01

    Purpose We attempted to determine risk factors for the development of failing vein graft and optimal treatment in patients with infrainguinal vein grafts. Methods We retrospectively reviewed a database of patients who underwent infrainguinal bypass using autogenous vein grafts due to chronic atherosclerotic arterial occlusive disease of lower extremity (LE) at a single institute between September 2003 and December 2011. After reviewing demographic, clinical, and angiographic features of the p...

  2. The Histological Changes of the Great Saphenous Vein at 2 Years after Cryosclerosis

    OpenAIRE

    Balint, Istvan Bence; Bali, Ottilia; Vargovics, Eszter; Simon, Eva; Vizsy, Laszlo

    2014-01-01

    Cryosclerosis was developed at the end of the last decade. It is the endovenous cryoablation of the great saphenous vein and has been forgotten before the era of the endovenous ablation techniques began. The caused histomorphological changes of the vein weren’t described before, especially, years after the procedure. A 31-year-old female patient underwent cryosclerosis 2 years ago. Because of the recanalization of the great saphenous vein and recurrent varicosity, high ligation, cryostripping...

  3. VARIATION IN THE OPENINGS (OSTIA OF LEFT PULMONARY VEINS INTO THE LEFT ATRIUM: A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Sesi

    2015-03-01

    Full Text Available During early embryonic development, absorption of pulmonary venous network by the left primitive atrial chamber results in opening of four pulmonary veins which drain independently into its chamber. The extent of absorption and hence, the number of pulmon ary veins which open into the left atrium, may vary. Here we report a variation in the opening of the Left upper (superior pulmonary vein into the Left atrium. A total of six openings observed

  4. A Case of Pulmonary Varix Associated with Superior Pulmonary Vein Occlusion

    OpenAIRE

    Tajiri, Sakurako; Koizumi, Jun; Hara, Takuya; Kamono, Masahiro; Hayama, Naoki; Kobayashi, Ichiro; Kondo, Yusuke; Kondo, Tetsuri; Asano, Koichiro; Abe, Tadashi

    2012-01-01

    A pulmonary varix is a localized dilatation of a pulmonary vein, which is usually asymptomatic presented as a mass on a chest roentgenogram, and diagnosed with pulmonary angiography. We encountered a case of 55 year-old man, in whom incidentally identified was a dilated blood vessel that passed through the minor fissure and returned to the inferior pulmonary vein, which we diagnosed as pulmonary varix. This vascular anomaly was accompanied by the occluded superior pulmonary vein, highly sugge...

  5. Iliac Vein Compression Syndrome due to Bladder Distention Caused by Urethral Calculi

    OpenAIRE

    Akiko Ikegami; Takeshi Kondo; Tomoko Tsukamoto; Yoshiyuki Ohira; Masatomi Ikusaka

    2015-01-01

    We report a rare case of iliac vein compression syndrome caused by urethral calculus. A 71-year-old man had a history of urethral stenosis. He complained of bilateral leg edema and dysuria for 1 week. Physical examination revealed bilateral distention of the superficial epigastric veins, so obstruction of both common iliac veins or the inferior vena cava was suspected. Plain abdominal computed tomography showed a calculus in the pendulous urethra, distention of the bladder (as well as the rig...

  6. Clinical Observation: Congenital Absence of the Left Portal Vein in a Patient Undergoing Hepatic Resection

    OpenAIRE

    C. K. Charny; Ling, P.; Botet, J.; L. H. Blumgart

    1997-01-01

    Congenital absence of the left portal vein is a rare vascular anomaly with a reported prevalence varying from one in 62 to one in 507 cases. A patient admitted for recurrent cholangitis secondary to extensive dilation of the left biliary ductal system associated with Caroli's Disease was determined by preoperative dynamic CT to have an excessively large right portal vein and no left portal vein. The surgeon must be aware of any variations in portal vascular anatomy in patients undergoing hepa...

  7. Right Cardiac Catheterization Using the Antecubital Fossa Vein in Korean Patients

    OpenAIRE

    Lee, Sang Hyun; Chun, Kook Jin; Lee, Dae Sung; Lee, Soo Yong; Hwang, Jongmin; Chon, Min Ku; Hwang, Ki Won; Kim, Jeong Su; Park, Yong Huyn; Kim, June Hong

    2016-01-01

    Background and Objectives Right heart catheterization is traditionally performed using a femoral vein approach that involves admission, bed rest, and risks of bleeding and hematoma. Recent studies have confirmed safety of the use of forearm vein for right cardiac catheterization. In the present study, we evaluated the feasibility of right cardiac catheterization via the antecubital fossa vein in Korean patients. Subjects and Methods The medical records of all patients who underwent right hear...

  8. Red blood cell deformability and aggregation in chronic venous disease patients with varicose veins

    OpenAIRE

    Karolina Słoczyńska; Mariusz Kózka; Henryk Marona

    2013-01-01

    Introduction: Red blood cells’ (RBC) rheological properties are disturbed in chronic venous disease (CVD). The aim of the study was to compare deformability and aggregation of erythrocytes taken from the varicose vein and the antecubital vein of patients with chronic venous disease.Materials and Methods: Blood samples were taken from twelve CVD patients presenting clinical, aetiological, anatomical and pathological elements (CEAP) stages II and III. Blood was sampled from varicose veins and a...

  9. Treatment of branch retinal vein occlusion induced macular edema with bevacizumab

    OpenAIRE

    Barthelmes Daniel; Wolf-Schnurrbusch Ute; Tappeiner Christoph; Abegg Mathias; Wolf Sebastian; Fleischhauer Johannes

    2008-01-01

    Abstract Background Branch retinal vein occlusion is a frequent cause of visual loss with currently insufficient treatment options. We evaluate the effect of Bevacizumab (Avastin®) treatment in patients with macular edema induced by branch retinal vein occlusion. Methods Retrospective analysis of 32 eyes in 32 patients with fluorescein angiography proven branch retinal vein occlusion, macular edema and Bevacizumab treatment. Outcome measures were best corrected visual acuity in logMAR and cen...

  10. Congenital hepatoportal arteriovenous fistula associated with intrahepatic portal vein aneurysm and portohepatic venous shunt: case report

    International Nuclear Information System (INIS)

    A congenital hepatoportal arteriovenous fistula associated with an intrahepatic portal vein aneurysm is a rare type of arteriovenous malformation. Only 14 pediatric cases have been reported to the best of the authors' knowledge. An intrahepatic shunt between the portal and systemic veins is also relatively rare. We report a case of a congenital hepatoportal arteriovenous fistula associated with an intrahepatic portal vein aneurysm and a portohepatic venous shunt in a neonate who presented with tachypnea and melena

  11. A Model For Syntectonic Fibrous Vein Growth Inferred From Microtextures. Ouachitas Orogen, Arkansas

    Science.gov (United States)

    Cervantes, P.; Wiltschko, D. V.

    2005-12-01

    Veins from the Lower Ordovician Mazarn Formation in the Arkansas' Ouachitas show two processes of vein growth, 1) continuous localized fracturing and filling and 2) recrystallization, tied to the deformation history of the area under study. Evidence for continuous localized fracturing includes the presence of veinlets near or at the vein-host interface. Veinlets are long and narrow features parallel to the main body of the vein, filled mainly with quartz, between 5 and 25 μm wide. Veinlets cut and displaced host grains. Displacement of host grains is evident because the material precipitated on veinlets show different luminescence than host grains. Remnants of these veinlets are observed in completely recrystallized fibers. Evidence for recrystallization includes, 1) wide fibers (more than 100 μm) with fluid inclusion trails parallel to fiber length that span the entire fiber length, 2) luminescence in the central part of the vein is different than luminescence in the external part of the vein (close to host-vein interface), 3) remnants of original luminescence in the central part of the vein suggesting that recrystallization is a later process. We hypothesize that in this region folding followed by flattening gave rise to boudinage of resistant layers accompanying abundant pressure solution providing the vein forming material. Precipitation of material took place along necks of boudins, which fractured repeatedly allowing veins to grow in width and length. Late thrust faults led to open system conditions which gave rise to new vein growth and recrystallization. Recrystallization altered the shape of previously formed veins.

  12. Postoperative neuralgia in the leg after saphenous vein coronary artery bypass graft: a prospective study.

    OpenAIRE

    Nair, U R; Griffiths, G.; Lawson, R. A.

    1988-01-01

    The degree of cutaneous sensory deficit in the leg was assessed after removal of the long saphenous vein in 50 consecutive patients undergoing coronary artery bypass vein grafts randomly assigned subcutaneous sutures or a single layer of sutures. Removal of the vein and repair of the leg incision were done by the same team of surgeons. In group 1 (25 patients) the leg incision was repaired with "00" Dexon subcutaneous and "00" prolene subcuticular sutures while in group 2 (25 patients) closur...

  13. Deep vein thrombosis: A rare complication in oral and maxillofacial surgery: A review of two cases

    OpenAIRE

    M.R. Ramesh Babu; C. Ramesh; Thirumurugan, K.; G Arun Prasad

    2013-01-01

    Deep vein thrombosis (DVT) is caused by obstruction of blood flow of deep veins in upper and lower limb. One of the precipitating factors for DVT is surgery under general anesthesia exceeding 30 min. However, there are very few reports of DVT associated with surgery of oral and maxillofacial region. In this paper we report two cases of DVT involving left ilio-femoropopliteal deep vein in one patient treated for fractured left angle of mandible and left peroneal vein in the other patient treat...

  14. [Stented dilated or varicose veins as arterial bypass transplants: experimental and initial clinical results].

    Science.gov (United States)

    Moritz, A; Magometschnigg, H; Staudacher, M; Ptakovsky, H; Raderer, F; Ullrich, R; Grabenwöger, F; Wolner, E

    1991-01-01

    Dilated and varicose veins are usually not used as arterial bypass-grafts despite they are lined with functional endothelium. External support by a constrictive mesh tube could conform these veins into evenly calibrated bypass-grafts. Ovine jugular veins could be constricted from 15 to 6 mm diameter without forming folds on the inner flow surface. 6 months after implantation of 5 cm long jugular vein segments into the carotid arteries of 7 sheep the inner diameter was 19.5 +/- 3.3 mm for native veins (n = 4) and 7.6 +/- 0.8 mm for constricted veins (n = 10). Intimal hyperplasia was reduced from 0.4 +/- 0.2 mm in native to 0.23 +/- 0.07 mm in reinforced veins (p = 0.03). Mesh tube constricted varicose veins were used as bypass material in 11 infrainguinal reconstructions. All grafts were well calibrated at control angiography. External constriction by mesh tubes is a means to convert varicose veins into suitable bypass grafts. PMID:1950138

  15. Probability of developing proximal deep-vein thrombosis and/or pulmonary embolism after distal deep-vein thrombosis.

    Science.gov (United States)

    Brateanu, Andrei; Patel, Krishna; Chagin, Kevin; Tunsupon, Pichapong; Yampikulsakul, Pojchawan; Shah, Gautam V; Wangsiricharoen, Sintawat; Amah, Linda; Allen, Joshua; Shapiro, Aryeh; Gupta, Neha; Morgan, Lillie; Kumar, Rahul; Nielsen, Craig; Rothberg, Michael B

    2016-03-01

    Isolated distal deep-vein thrombosis (DDVT) of the lower extremities can be associated with subsequent proximal deep-vein thrombosis (PDVT) and/or acute pulmonary embolism (PE). We aimed to develop a model predicting the probability of developing PDVT and/or PE within three months after an isolated episode of DDVT. We conducted a retrospective cohort study of patients with symptomatic DDVT confirmed by lower extremity vein ultrasounds between 2001-2012 in the Cleveland Clinic Health System. We reviewed all the ultrasounds, chest ventilation/perfusion and computed tomography scans ordered within three months after the initial DDVT to determine the incidence of PDVT and/or PE. A multiple logistic regression model was built to predict the rate of developing these complications. The final model included 450 patients with isolated DDVT. Within three months, 30 (7 %) patients developed an episode of PDVT and/or PE. Only two factors predicted subsequent thromboembolic complications: inpatient status (OR, 6.38; 95 % CI, 2.17 to 18.78) and age (OR, 1.02 per year; 95 % CI, 0.99 to 1.05). The final model had a bootstrap bias-corrected c-statistic of 0.72 with a 95 % CI (0.64 to 0.79). Outpatients were at low risk ( 10 %). Inpatients aged < 60 were at intermediate risk. We created a simple model that can be used to risk stratify patients with isolated DDVT based on inpatient status and age. The model might be used to choose between anticoagulation and monitoring with serial ultrasounds. PMID:26660731

  16. Proposed Multi-Modal Palm Veins-Face Biometric Authentication

    Directory of Open Access Journals (Sweden)

    S.F. Bahgat

    2013-07-01

    Full Text Available Biometric authentication technology identifies people by their unique biological information. An account holder’s body characteristics or behaviors are registered in a database and then compared with others who may try to access that account to see if the attempt is legitimate. Since veins are internal to the human body, its information is hard to duplicate. Compared with a finger or the back of a hand, a palm has a broader and more complicated vascular pattern and thus contains a wealth of differentiating features for personal identification. However, a single biometric is not sufficient to meet the variety of requirements, including matching performance imposed by several large-scale authentication systems. Multi-modal biometric systems seek to alleviate some of the drawbacks encountered by uni-modal biometric systems by consolidating the evidence presented by multiple biometric traits/sources. This paper proposes a multi-modal authentication technique based on Palm Veins as a personal identifying factor, augmented by face features to increase the accuracy of security recognition. The obtained results point at an increased authentication accuracy.

  17. Inorganic phosphate inhibits sympathetic neurotransmission in canine saphenous veins

    International Nuclear Information System (INIS)

    Inorganic phosphate has been proposed as the initiator of metabolic vasodilatation in active skeletal muscle. The present study was primarily designed to determine if this substance has an inhibitory effect on adrenergic neurotransmission. Rings of canine saphenous veins were suspended for isometric tension recording in organ chambers. A comparison was made of the ability of inorganic phosphate (3 to 14 mM) to relax rings contracted to the same degree by electrical stimulation, exogenous norepinephrine, and prostaglandin F/sub 2α/. The relaxation during electrical stimulation was significantly greater at all concentrations of phosphate. In strips of saphenous veins previously incubated with [3H]norepinephrine, the depression of the contractile response caused by phosphate during electrical stimulated was accompanied by a significant reduction in the overflow of labeled neurotransmitter. Thus inorganic phosphate inhibits sympathetic neurotransmission and hence may have a key role in the sympatholysis in the active skeletal muscles during exercise. By contrast, in this preparation, it has a modest direct relaxing action on the vascular smooth muscle

  18. Peripheral nerve regeneration with conduits: use of vein tubes

    Directory of Open Access Journals (Sweden)

    Rodrigo Guerra Sabongi

    2015-01-01

    Full Text Available Treatment of peripheral nerve injuries remains a challenge to modern medicine due to the complexity of the neurobiological nerve regenerating process. There is a greater challenge when the transected nerve ends are not amenable to primary end-to-end tensionless neurorraphy. When facing a segmental nerve defect, great effort has been made to develop an alternative to the autologous nerve graft in order to circumvent morbidity at donor site, such as neuroma formation, scarring and permanent loss of function. Tubolization techniques have been developed to bridge nerve gaps and have been extensively studied in numerous experimental and clinical trials. The use of a conduit intends to act as a vehicle for moderation and modulation of the cellular and molecular ambience for nerve regeneration. Among several conduits, vein tubes were validated for clinical application with improving outcomes over the years. This article aims to address the investigation and treatment of segmental nerve injury and draw the current panorama on the use of vein tubes as an autogenous nerve conduit.

  19. Veins and Lymphatics is taking its first steps

    Directory of Open Access Journals (Sweden)

    Stefano Ricci

    2012-06-01

    Full Text Available Veins represent an important field of medicine. They are frequently involved in several diseases with a very wide range of severity. At one end of the spectrum, we have thrombosis and post-thrombotic syndrome, while at the other we have telangectasias, and a vast number of other conditions lie between these two extremes. Varicose veins are not always severe, but they affect an enormous number of people, with a consequent social and economic burden to society. Lymphology is also an important subject. Lymphatics play a role in many human diseases but lymphedema is a sort of Cinderella disease, neglected by patients, doctors and health care administrators. The name itself shows how little we know; a description of the clinical manifestation has been transformed into the name of the disease. Lymphedema is usually considered to be an inevitable event, be it congenital or secondary. Its incidence is thought to be growing each year, especially in poorer countries and in the field of oncology. Lymphedema treatment is mostly unsatisfactory and costs are high, while patient adherence to treatment is low...

  20. Effective management of acute deep vein thrombosis: direct oral anticoagulants.

    Science.gov (United States)

    Roussin, A

    2015-02-01

    Deep vein thrombosis (DVT) is a manifestation of venous thromboembolism (VTE) and accounts for most venous thromboembolic events. Although DVT is not directly life-threatening, thrombi in the proximal veins of the leg can embolize to the lungs to form a pulmonary embolism, which may prove rapidly fatal. If untreated, DVT can also lead to significant morbidity, including development of post-thrombotic syndrome. Among many risk factors, surgery, hospitalization, older age and active cancer increase the risk of VTE, and a previous event increases the risk of recurrence. Early detection and effective clot resolution are vital in managing DVT. Conventional approaches to acute treatment of VTE involve initial fast-acting parenteral heparin overlapping with and followed by vitamin K antagonist therapy. However, vitamin K antagonists have a narrow therapeutic window, require regular monitoring, and have multiple food and drug interactions. Results from phase III clinical studies involving direct Factor Xa and IIa inhibitors suggest that these agents provide an alternative therapeutic option that overcomes some of the complications associated with conventional treatment with predictable pharmacological properties and convenient dosing schedules. Analysis of data from the rivaroxaban EINSTEIN studies also suggests that these agents have the potential to improve patient-reported treatment satisfaction and reduce the length of hospital stay compared with conventional therapy. This review considers these treatment options, suitable treatment durations to prevent recurrence, and the management of DVT treatment in challenging patient groups. PMID:24927023

  1. Enlarged spinoglenoid notch veins causing suprascapular nerve compression

    International Nuclear Information System (INIS)

    To report the magnetic resonance (MR) imaging findings of enlarged veins in the spinoglenoid notch as a cause of suprascapular nerve compression.Design and patients Six patients presented to MR imaging for evaluation of chronic shoulder pain. Clinical information and MR imaging studies were reviewed. The spinoglenoid notch vascular structures were compared with measurements made in 10 age-matched controls. Spinoglenoid notch vascular structures measured in 10 asymptomatic age-matched control patients ranged from 1 to 4 mm in diameter with an average of 2.2 mm. The six study patients had vascular structures that ranged from 6 to 10 mm in diameter with an average of 8.4 mm. Atrophy and fatty infiltration of the infraspinatus muscle was noted as an associated finding at MR imaging in all six patients. Surgery was performed in three of the six patients, at which time a venous varix was identified in the spinoglenoid notch in all three patients. We describe distended veins in the spinoglenoid notch. These may be readily apparent at MR imaging and should be distinguished from paralabral ganglion cysts compressing the suprascapular nerve in the absence of labral tears, especially if percutaneous aspiration of a ganglion cyst is entertained. (orig.)

  2. Enlarged spinoglenoid notch veins causing suprascapular nerve compression

    Energy Technology Data Exchange (ETDEWEB)

    Carroll, Kevin W. [Radiology Regional Center, 700 Goodlette Road, Naples, FL 34102 (United States); Helms, Clyde A. [Duke University Medical Center, Department of Radiology, Box 3808, Durham, NC 27710 (United States); Otte, Michael T. [Invision Medical Imaging and Radiology, 8200 East Belleview Avenue, Suite 124, Greenwood Village, CO 80111 (United States); Moellken, S.M.C. [San Francisco Magnetic Resonance Center, 3333 California Street, Suite 105, San Francisco, CA 94118 (United States); Fritz, R. [National Orthopedic Associates, 1260 South Eliseo Drive, Greenbrae, CA 94904 (United States)

    2003-02-01

    To report the magnetic resonance (MR) imaging findings of enlarged veins in the spinoglenoid notch as a cause of suprascapular nerve compression.Design and patients Six patients presented to MR imaging for evaluation of chronic shoulder pain. Clinical information and MR imaging studies were reviewed. The spinoglenoid notch vascular structures were compared with measurements made in 10 age-matched controls. Spinoglenoid notch vascular structures measured in 10 asymptomatic age-matched control patients ranged from 1 to 4 mm in diameter with an average of 2.2 mm. The six study patients had vascular structures that ranged from 6 to 10 mm in diameter with an average of 8.4 mm. Atrophy and fatty infiltration of the infraspinatus muscle was noted as an associated finding at MR imaging in all six patients. Surgery was performed in three of the six patients, at which time a venous varix was identified in the spinoglenoid notch in all three patients. We describe distended veins in the spinoglenoid notch. These may be readily apparent at MR imaging and should be distinguished from paralabral ganglion cysts compressing the suprascapular nerve in the absence of labral tears, especially if percutaneous aspiration of a ganglion cyst is entertained. (orig.)

  3. Isolation and culture of umbilical vein mesenchymal stem cells

    Directory of Open Access Journals (Sweden)

    D.T. Covas

    2003-09-01

    Full Text Available Bone marrow contains a population of stem cells that can support hematopoiesis and can differentiate into different cell lines including adipocytes, osteocytes, chondrocytes, myocytes, astrocytes, and tenocytes. These cells have been denoted mesenchymal stem cells. In the present study we isolated a cell population derived from the endothelium and subendothelium of the umbilical cord vein which possesses morphological, immunophenotypical and cell differentiation characteristics similar to those of mesenchymal stem cells isolated from bone marrow. The cells were isolated from three umbilical cords after treatment of the umbilical vein lumen with collagenase. The cell population isolated consisted of adherent cells with fibroblastoid morphology which, when properly stimulated, gave origin to adipocytes and osteocytes in culture. Immunophenotypically, this cell population was found to be positive for the CD29, CD13, CD44, CD49e, CD54, CD90 and HLA-class 1 markers and negative for CD45, CD14, glycophorin A, HLA-DR, CD51/61, CD106, and CD49d. The characteristics described are the same as those presented by bone marrow mesenchymal stem cells. Taken together, these findings indicate that the umbilical cord obtained from term deliveries is an important source of mesenchymal stem cells that could be used in cell therapy protocols.

  4. Upper extremity deep vein thrombosis in a TV cameraman.

    Science.gov (United States)

    Beasley, R; Braithwaite, I; Evans, R

    2015-06-01

    We report the case of a 40-year-old right-handed man who developed a right subclavian vein thrombosis due to work as a TV cameraman. He presented with a sudden onset of marked swelling and blue discolouration of his right arm 3 weeks after the most strenuous and prolonged episode of TV camera work that he had ever undertaken. This involved carrying a 9kg camera on his shoulder, with his right arm flexed and abducted, for a 60min period with provocation of severe pain and marked discomfort persisting during the subsequent 3 weeks before presentation. A clinical diagnosis of upper extremity deep vein thrombosis (UEDVT) was made, with the diagnosis confirmed by ultrasound. He was treated with catheter-induced thrombolysis and a 3 month course of anticoagulation. He was advised that his UEDVT was caused by his occupation and that he should no longer work as a cameraman. This case shows the importance of identifying any occupational cause of UEDVT. PMID:25733529

  5. Numerical modelling of the formation of fibrous bedding-parallel veins

    Science.gov (United States)

    Torremans, Koen; Muchez, Philippe; Sintubin, Manuel

    2014-05-01

    Bedding-parallel veins with a fibrous infill oriented orthogonal to the vein wall, are often observed in fine-grained metasedimentary sequences. Several mechanisms have been proposed for their formation, mostly with respect to effects of fluid overpressures and anisotropy of the host-rock fabric in order to explain the inferred extensional failure with sub-vertical opening. Abundant pre-folding, bedding-parallel fibrous dolomite veins are found associated with the Nkana-Mindola stratiform Cu-Co deposit in Zambia. The goal of this study is to better understand the formation mechanisms of these veins and to explain their particular spatial and thickness distribution, with respect to failure of transversely isotropic rocks. The spatial distribution and thickness variation of these veins was quantified during a field campaign in thirteen line transects perpendicular to undeformed veins in underground crosscuts. The fibrous dolomite veins studied are not related to lithological contrasts, but to a strong bedding-parallel shaly fabric, typical for the black shale facies of the Copperbelt Orebody Member. The host rock can hence be considered as transversely isotropic. Growth morphologies vary from antitaxial with a pronounced median surface to asymmetric syntaxial, always with small but quantifiable growth competition. A microstructural fabric study reveals that the undeformed dolomite veins show low-tortuosity vein walls and quantifiable growth competition. Here, we use a Discrete Element Method numerical modelling approach with ESyS-Particle (http://launchpad.net/esys-particle) to simulate the observed properties of the veins. Calibrated numerical specimens with a transversely isotropic matrix are repeatedly brought to failure under constant strain rates by changing the effective strain rates at model boundaries. After each fracture event, fractures in the numerical model are filled with cohesive vein material and the experiment is repeated. By systematically varying

  6. Prospective clinical study of surgical management of varicose veins of lower limb and its complications

    Directory of Open Access Journals (Sweden)

    Nagaraj H.

    2014-02-01

    Methods: Two years prospective study was conducted in our institution from May 2007 to April 2009. During this period 62 cases of varicose veins of lower limbs were admitted to our hospital of which 50 cases were selected and were studies in detail. After thorough clinical examination and relevant investigation they are all subjected to surgical management. Results: Out of 50 cases studied, 21 (42% had only long saphenous vein involvement, 7 (14% had short saphenous vein involvement and in 5 (10% cases both short and long saphenous system were involved. In addition to long saphenous vein involvement, incompetent perforators were present in 17 (34% cases. Among them prominent veins and pain were the main complain in 38 (78% patients. Itching and pigmentation were present in 4 (8% patients. Ankle edema was present in 6 (12% patients. Pain and ulceration of lower leg were present in 2 (4% patients. After clinical assessment appropriate surgical procedures were followed for each of patients. These cases were followed for 3 year durations. Out of 50 patients 7 (14% patients had recurrence of varicose vein. 7 (14% patient complained of recurrence of pain after 2 years of surgery but no appearance of varicose vein. One patient (2% complained of persistence of pigmentation after surgery. 2 (4% patients complained of persistence of ankle edema and there was complete healing of ulcer which was present earlier. Conclusions: Commonest age group of varicose vein of lower limb was 20 to 40 years. Definite relationship exists between the occupation and the incidence of varicose veins. The patients were in the occupation which required standing for long time had the higher chances of varicose vein. Severity of the symptoms is not proportional to the duration of varicose veins. The involvement of long saphenous vein is more common than the short saphenous vein. Since our study shows very low percentage of recurrence and symptoms related to varicose vein the surgical line of

  7. Incidence of Central Vein Stenosis and Occlusion Following Upper Extremity PICC and Port Placement

    International Nuclear Information System (INIS)

    The purpose of this study was to determine the incidence of central vein stenosis and occlusion following upper extremity placement of peripherally inserted central venous catheters(PICCs) and venous ports. One hundred fifty-four patients who underwent venography of the ipsilateral central veins prior to initial and subsequent venous access device insertion were retrospectively identified. All follow-up venograms were interpreted at the time of catheter placement by one interventional radiologist over a 5-year period and compared to the findings on initial venography. For patients with central vein abnormalities, hospital and home infusion service records and radiology reports were reviewed to determine catheter dwelltime and potential alternative etiologies of central vein stenosis or occlusion. The effect of catheter caliber and dwell time on development of central vein abnormalities was evaluated. Venography performed prior to initial catheter placement showed that 150 patients had normal central veins. Three patients had central vein stenosis, and one had central vein occlusion. Subsequent venograms (n = 154)at the time of additional venous access device placement demonstrated 8 patients with occlusions and 10 with stenoses. Three of the 18 patients with abnormal follow-up venograms were found to have potential alternative causes of central vein abnormalities. Excluding these 3 patients and the 4 patients with abnormal initial venograms, a 7% incidence of central vein stenosis or occlusion was found in patients with prior indwelling catheters and normal initial venograms. Catheter caliber showed no effect on the subsequent development of central vein abnormalities. Patients who developed new or worsened central vein stenosis or occlusion had significantly (p =0.03) longer catheter dwell times than patients without central vein abnormalities. New central vein stenosis or occlusion occurred in 7% of patients following upper arm placement of venous access devices

  8. Anatomical morphologic study of pulmonary vein antrum by computed tomography angiography in patients with artrial fibrillation

    International Nuclear Information System (INIS)

    Objective: To characterize and mearsure the pulmonary vein antrum by 3-dimentional reconstruction computed tomography angiography (3D-CTA). Methods: Thirty patients with paroxysmal/ persistent atrial fibrillation (AF)undergoing 3D-CTA before catheter linear ablation of AF were studied for the dimensions of pulmonary vein ostium the length of ridge among ipsilateral pulmonary veins and between left arial appendage (LAA) and left pulmonary veins (LPVs). Results: The maximal and minimal diameters (dmax and drain) of left superior pulmonary vein (LSPV), left inferior pulmonary vein (LIPV), right superior pulmonary vein (RSPV) and right inferior pulmonary vein (RIPV) were(24.30±4.54)mm, (17.76±4.24) mm; (19.10±4s.45)mm, (12.27±3.52)mm; (22.99±5.04)mm, (16.19±4.87)mm; (18.63±4.60)mm, (14.46±3.48)mm; respectively. The average length of anterior, medium and posterior ridges among LPVs and those of the right pulmonary vein (RPVs) were(14.78±3.86)mm and (15.86±5.14)mm, (2.20±1.42) mm and (2.91±3.3.5)mm, (14.91±3.82)mm and (18.73±5.55)mm, respectively. The lenghs of the superior, medium and inferior ridge between LAA and LPVs were (19.12±4.98)mm, (7.74±3.30)mm and (17.92±5.14)mm respectively. Conclusion: 3D-CTA can prevent the actral three-dimensional structures of the pulmonary vein antrum and provide the understanding in detail before the catheter linear ablation. Significant difference in the structure of the pulmonary vein antrum exists congenitally, therefore it is crucial to have a complete knowledge before performing this procedure. (authors)

  9. Endovascular treatment of a cavernous sinus dural arteriovenous fistula by transvenous embolisation through the superior ophthalmic vein via cannulation of a frontal vein

    Energy Technology Data Exchange (ETDEWEB)

    Venturi, C.; Bracco, S.; Cerase, A.; Gennari, P. [Unit of Diagnostic and Therapeutic Neuroradiology, Policlinico ' ' Le Scotte' ' , Azienda Ospedaliera Universitaria Senese, Viale Mario Bracci 16, 53100, Siena (Italy); Lore, F. [Institute of Endocrinology, Policlinico ' ' Le Scotte' ' , University of Siena, Viale Mario Bracci 16, 53100, Siena (Italy); Polito, E. [Institute of Ophthalmology, Policlinico ' ' Le Scotte' ' , University of Siena, Viale Mario Bracci 16, 53100, Siena (Italy); Casasco, A.E. [Department of Endovascular and Percutaneous Therapy, Clinica Nuestra Senora del Rosario, Madrid (Spain)

    2003-08-01

    We describe a new approach for transvenous embolisation of cavernous sinus dural arteriovenous fistulae through the superior ophthalmic vein (SOV), i.e., via percutaneous cannulation of a frontal vein. Modern neurointerventional angiographic materials make it possible to reach the SOV in this way without puncturing it in the orbit or a surgical exposure. Orbital phlebography should still be in the repertoire of interventional neuroradiology units in large centres. (orig.)

  10. Endovascular treatment of a cavernous sinus dural arteriovenous fistula by transvenous embolisation through the superior ophthalmic vein via cannulation of a frontal vein

    International Nuclear Information System (INIS)

    We describe a new approach for transvenous embolisation of cavernous sinus dural arteriovenous fistulae through the superior ophthalmic vein (SOV), i.e., via percutaneous cannulation of a frontal vein. Modern neurointerventional angiographic materials make it possible to reach the SOV in this way without puncturing it in the orbit or a surgical exposure. Orbital phlebography should still be in the repertoire of interventional neuroradiology units in large centres. (orig.)

  11. Mapping of superficial extremity veins: normal diameters and trends in a vascular patient-population.

    Science.gov (United States)

    Spivack, Dan E; Kelly, Patrick; Gaughan, John P; van Bemmelen, Paul S

    2012-02-01

    Ultrasonic measurement of superficial extremity veins is a common procedure. To establish normal values for vein-size in a population of vascular patients and to assess if measurements remain unchanged over time, we analyzed a database with results of 28,130 measurements in 2420 separate saphenous and 3206 cephalic veins. Mean size of the great saphenous vein ranges from 2.3 mm to 4.4 mm but did not follow a tapering pattern as is often assumed. The distal calf segment is smaller than the ankle segment. The mean cephalic vein size in the upper arm (2.4 mm) was smaller than at the antecubital level (2.7 mm). A decrease in vein diameter over time was noted in many locations and this reached statistical significance (p < 0.005 for the thigh segment). The clinical significance of this is a need to repeat ultrasonic vein-mapping if more than a year elapses between ultrasound and surgical vein harvest. PMID:22230131

  12. Branching vertical vein with multiple sites of obstruction in supracardiac total anomalous pulmonary venous connection

    Directory of Open Access Journals (Sweden)

    Navaneetha Sasikumar

    2014-01-01

    Full Text Available We present the case of an infant with total anomalous pulmonary venous connection and a branching vertical vein with multiple points of narrowing, draining the confluence into the innominate vein. The embryology and clinical relevance of this interesting anatomy is discussed.

  13. Atraumatic Subclavian Vein Thrombosis in a Collegiate Baseball Player: A Case Report

    OpenAIRE

    Hurley, Wendy L.; Comins, Sonya A; Green, Richard M.; Canizzaro, John

    2006-01-01

    Objective: To introduce the case of a collegiate baseball player who suffered an atraumatic subclavian vein thrombosis. This case presents an opportunity to discuss the diagnosis and treatment of a 22-year-old male with a thrombosis of his right subclavian vein.

  14. CASE SERIES : PULSATILE LOWER LIMB VEINS - HAVE A LOOK AT THE HEART

    OpenAIRE

    Rupesh Mandava; Ritesh Santosham; Rajiv Santosham; Roy Santosham; Rajan Santosham

    2015-01-01

    Respiratory phasic variation is a normal phenomenon in the lower limb veins. Whenever there is evidence of a pulsatile flow or a positive wave seen above the baseline it calls for evaluation of the cardiovascular system. We present three cases of pulsatile wave form in the lower limb veins that had cardiac pathologies

  15. Iliopsoas bursitis with compression of the common femoral vein resulting in acute lower leg edema

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, Seung Bae; Kwak, Hyo Sung; Han, Young Min; Lee, Sang Yong; Jeong, Yeon Jun [Chonbuk National University Medical School, Chonju (Korea, Republic of)

    2006-08-15

    The clinical manifestations related to iliopsoas bursitis can vary due to compression of the adjacent structure such as the common femoral vein, nerve and bladder. We report here on a rare case of iliopsoas bursitis with compression of the common femoral vein that resulted in acute lower leg edema.

  16. A rare case of anastomosis between the external and internal jugular veins

    Science.gov (United States)

    Karapantzos, Ilias; Zarogoulidis, Paul; Charalampidis, Charalampos; Karapantzou, Chrysanthi; Kioumis, Ioannis; Tsakiridis, Kosmas; Mpakas, Andrew; Sachpekidis, Nikolaos; Organtzis, John; Porpodis, Konstantinos; Zarogoulidis, Konstantinos; Pitsiou, Georgia; Zissimopoulos, Athanasios; Kosmidis, Christoforos; Fouka, Evagelia; Demetriou, Theodoros

    2016-01-01

    Jugular veins bring deoxygenated blood from the head back to the heart. There are two sets of external and internal veins. The external jugular vein receives the greater part of the blood from the cranium and the deep parts of the face. It commences from the substance of the parotid gland and runs down the neck at the posterior border of sternocleidomastoideus and ends in the subclavian vein in front of the scalenus anterior. The external jugular vein is covered by the platysma and its upper half runs parallel with the great auricular nerve. There is also another minor jugular vein, the anterior, draining the submaxillary region. In our patient, we recognized a shunt between the external and internal jugular veins. It appeared in the middle of the veins, between the pair of valves, which are placed ~2.5 cm above the termination of the vessel. The anastomosis was fully functional, and there was no problem in the blood pressure of the patient. Moreover, the shunt was not associated with any systemic disease. PMID:27051321

  17. Isotopic angiography in the study of deep vein circulation of the upper limb

    International Nuclear Information System (INIS)

    Sequential angioscintigraphy using sup(99m)Tc was performed in patients to evaluate its usefulness in the measurement of deep vein circulation of the upper limb. It proved to provide very good informations about established deep-vein thrombosis and about intermittent venous compression. Several examples are discussed

  18. Right top pulmonary vein: Evaluation with 64 section multidetector computed tomography

    International Nuclear Information System (INIS)

    Purpose: To evaluate the incidence and anatomic features of the rare variant of the pulmonary veins named 'right top pulmonary vein' as depicted with 64 section multidetector computed tomography (MDCT). Materials and methods: MDCT of 610 patients obtained over 12 months period for diagnosis of suspected thoracic or cardiac pathology were routinely reviewed in transverse and 3D images. The frequency of right top pulmonary vein (RTPV) was determined and anatomic features were also documented. Results: Right top pulmonary vein (RTPV) is a supernumerary vein arising from the roof of the right part of the left atrium separately from the orifice of the right superior pulmonary vein. It crosses behind the intermediate bronchus and drains mainly posterior segment of the right upper lobe but also receives few subsegmental branches of superior segment of the right lower lobe. It was detected in 2.2% of patients (14/610). The mean diameter of RTPV was 5.1 mm. Conclusion: The RTPV is a rare venous drainage variation of pulmonary veins. It is important to be aware of this anatomic pattern for avoiding misinterpretation of pulmonary venographic findings, inadvertent ablation of pulmonary vein and perioperative bleeding during video assisted thorocoscopic lobectomy

  19. Radiologic findings of neonatal cerebral infarction related with portal vein thrombosis: case report

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Yeon Soo [Holy Family Hospital, College of Medicine, the Catholic University of Korea, Bucheon (Korea, Republic of)

    2007-03-15

    A cerebral infarction in a newborn infant is not uncommon and is major cause of neonatal seizure. The author encountered one case of cerebral infarction that was assumed to be related to a portal vein thrombosis, and reports the radiology findings of a neonatal cerebral infarction and portal vein thrombosis.

  20. Sonographic findings of the internal jugular vein valve in normal children

    International Nuclear Information System (INIS)

    To describe the sonographic findings of the valve in the internal jugular vein in normal children. Seventy children (5-15 years, average age 10.8 years, 36 boys and 34 girls) were recruited for the study. The number of cusps, length and insertion sites of the valve in the internal jugular vein was examined. Sex differences were investigated, in addition to the symmetry of the valves found in both of the veins. In all children, valve was found in either one or both internal jugular veins. Sixteen percents of the children had valve on one side only, while eighty four percents showed on both sides. All the one side were found on the right side only. Nine percents of the valves in the internal jugular veins of the children were bicuspid and ninety one percents were unicuspid. The length of the cusps was on the average, 7.59 ± 2.77 mm. The insertion of the cusps was on the average, 6.75 ± 2.59 mm (range: 0-12.0 mm), proximal to the confluence of the subclavian and internal jugular veins to form the brachiocephalic vein. There was no significant statistical difference of the number of cusps, length and insertion sites of the valves on both sides and sex distinction. A valve in internal jugular vein is identified in all cases on ultrasonography. There was no significant statistical difference of the number of cusps, length and insertion sites of the valves on both sides and sex distinction.

  1. Autogenous standard versus inside-out vein graft to repair facial nerve in rabbits

    Institute of Scientific and Technical Information of China (English)

    TANG Jie; WANG Xue-mei; HU Jing; LUO En; QI Meng-chun

    2008-01-01

    To evaluate autogenous vein grafts and inside-out vein grafts as conduits for the defects repair in the rabbit facial nerves.Methods:The 10 mm segments of buccal division of facial nerve were transected for 48 rabbits in this study.Then the gaps were immediately repaired by autogenous vein grafts or inside-out vein grafts in different groups. All the animals underwent the whisker movement test and electrophysiologic test during the following 16 weeks at different time points postoperatively. Subsequently,the histological examination was performed to observe the facial nerve regeneration morphologically.Results:At 8 weeks after operation,the facial nerve regeneration has significant difference between the experimental group and the control group in electrophysiologic test and histological observation. However,at the end of this study,16 weeks after operation,there was no significant difference between inside-out vein grafts and standard vein grafts in enhancing peripheral nerve regeneration.Conclusion:This study suggest that both kinds of vein grafts play positive roles in facial nerve regeneration after being repaired immediately,but the autogenous inside-out vein grafts might accelerate and facilitate axonal regeneration as compared with control.

  2. Viscoelastic evaluation of fetal umbilical vein for reconstruction of middle cerebral artery

    Institute of Scientific and Technical Information of China (English)

    Dongyuan Li; Donghui Xu; Peng Li; Jun Wei; Kun Yang; Conghai Zhao

    2013-01-01

    The transplantation of artificial blood vessels with<6 mm inner diameter as substitutes for human arterioles or veins has not achieved satisfactory results. Umbilical vein has been substituted for ar-tery in vascular transplantation, but it remains unclear whether the stress relaxation and creep tween these vessels are consistent. In this study, we used the fetal umbilical vein and middle cere-bral artery from adult male cadavers to make specimens 15 mm in length, 0.196-0.268 mm in nica media thickness, and 2.82-2.96 mm in outer diameter. The results demonstrated that the stress decrease at 7 200 seconds was similar between the middle cerebral artery and fetal umbilical vein specimens, regardless of initial stress of 18.7 kPa or 22.5 kPa. However, the strain increase at 7 200 seconds of fetal umbilical veins was larger than that of middle cerebral arteries. Moreover, the stress relaxation experiment showed that the stress decrease at 7 200 seconds of the fetal umbilical vein and middle cerebral artery specimens under 22.5 kPa initial stress was less than the decrease in these specimens under 18.7 kPa initial stress. These results indicate that the fetal umbilical vein has appropriate stress relaxation and creep properties for transplantation. These properties are advantageous for vascular reconstruction, indicating that the fetal umbilical vein can be transplanted to repair middle cerebral artery injury.

  3. Abnormal veins around the heart with the closure of the coronary sinus ostium.

    Science.gov (United States)

    Ishizawa, Akimitsu; Suzuki, Ryoji; Zhou, Ming; Abe, Hiroshi

    2016-06-01

    In a cadaveric dissection course at Akita University Graduate School of Medicine in 2014, we observed abnormal veins in a 72-year-old male who died of prostate cancer. The abnormality consisted of the following: closure of the opening of the coronary sinus (closure of the coronary sinus ostium), a persistent left superior vena cava (Lsvc), and a postaortic left brachiocephalic vein (Palbv). The shunt between the coronary sinus and left atrium was not observed. The blood of the coronary sinus flowed into an oblique vein of the left atrium, which was wide and reverse-funnel shaped, penetrated the pericardial sac then continued to the Lsvc. The anastomotic veins between the Lsvc and the (right) superior vena cava were seen to consist of two veins as follows: one was a left brachiocephalic vein, the other a dorsal postaortic left brachiocephalic vein (dorsal Palbv). The dorsal Palbv passed dorsally on the ligamentum arteriosum, and then passed between the ascending aorta and the trachea. The dorsal Palbv was thicker than the left brachiocephalic vein. We discuss the process of formation of these variations. PMID:26329835

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

    Directory of Open Access Journals (Sweden)

    Natanel Jourabchi

    2013-01-01

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

  5. Transposition of cephalic vein to rescue hemodialysis access arteriovenous fistula and treat symptomatic central venous obstruction

    Directory of Open Access Journals (Sweden)

    Felipe Jose Skupien

    2014-03-01

    Full Text Available It is known that stenosis or central venous obstruction affects 20 to 50% of patients who undergo placement of catheters in central veins. For patients who are given hemodialysis via upper limbs, this problem causes debilitating symptoms and increases the risk of loss of hemodialysis access. We report an atypical case of treatment of a dialysis patient with multiple comorbidities, severe swelling and pain in the right upper limb (RUL, few alternative sites for hemodialysis vascular access, a functioning brachiobasilic fistula in the RUL and severe venous hypertension in the same limb, secondary to central vein occlusion of the internal jugular vein and right brachiocephalic trunk. The alternative surgical treatment chosen was to transpose the RUL cephalic vein, forming a venous necklace at the anterior cervical region, bypassing the site of venous occlusion. In order to achieve this, we dissected the cephalic vein in the right arm to its junction with the axillary vein, devalved the cephalic vein and anastomosed it to the contralateral external jugular vein, providing venous drainage to the RUL, alleviating symptoms of venous hypertension and preserving function of the brachiobasilic fistula.

  6. Blood flow velocity in the Popliteal Vein using Transverse Oscillation Ultrasound

    DEFF Research Database (Denmark)

    Bechsgaard, Thor; Lindskov Hansen, Kristoffer; Brandt, Andreas Hjelm; Holbek, Simon; Lönn, Lars; Strandberg, Charlotte; Bækgaard, Niels; Bachmann Nielsen, Michael; Jensen, Jørgen Arendt

    2016-01-01

    the veins of the lower limbs. Four volunteers were recruited for the study. A standardized flow was provoked with a cuff compression-decompression system placed around the lower leg. The average peak velocity in the popliteal vein of the four volunteers was 151.5 cm/s for SDUS and 105.9 cm/s for TOUS...

  7. Normal and abnormal development of pulmonary veins : State of the art and correlation with clinical entities

    NARCIS (Netherlands)

    Douglas, Yvonne L.; Jongbloed, Monique R. M.; DeRuiter, Marco C.; Gittenberger-de Groot, Adriana C.

    2011-01-01

    Interest for the pulmonary veins has increased in the past decade after the potential arrhythmogenicity of the myocardial sleeve surrounding these structures has been recognized. Furthermore, there are several clinical entities, such as anomalous connection pattern and pulmonary vein stenosis, that

  8. Single-Session Treatment of Portal Vein Thrombosis Using Combined Pharmacomechanical Thrombolysis

    OpenAIRE

    Darcy, Michael

    2007-01-01

    A patient with portal hypertension developed thrombosis of her transjugular intrahepatic portosystemic shunt (TIPS) and the portal vein. The Trellis device (Bacchus Vascular, Santa Clara, CA) was used to achieve rapid lysis of the portal vein thrombus and help restore portal and TIPS patency in a single session.

  9. Endoscopically visible steam pop during high-energy laser pulmonary vein ablation

    OpenAIRE

    Gal, P.; Smit, J. J. J; Elvan, A.

    2015-01-01

    A 58-year-old woman with atrial fibrillation underwent laser balloon ablation at our centre. During 12 W ablation in the left superior pulmonary vein, a sudden steam pop was witnessed with displacement of the balloon catheter. Visualisation of the pulmonary vein antrum showed a red discolouration at the last ablation site.

  10. Portal vein thrombosis due to Candida albicans associated with hepatic cirrhosis.

    OpenAIRE

    Torres, G.; Gil Grande, L. A.; Boixeda, B.; Martín-de-Argila, C.; Barcena, R.; Garcia Hoz, F.

    1993-01-01

    A case of portal vein thrombosis due to Candida albicans in a patient with alcoholic hepatic cirrhosis in the absence of hepatocarcinoma is described. Infection is a known cause of portal vein thrombosis but thrombosis by Candida albicans has not to our knowledge been previously reported.

  11. Fondaparinux for the Treatment of Superficial-Vein Thrombosis in the Legs

    NARCIS (Netherlands)

    Decousus, Herve; Prandoni, Paolo; Mismetti, Patrick; Bauersachs, Rupert M.; Boda, Zoltan; Brenner, Benjamin; Laporte, Silvy; Matyas, Lajos; Middeldorp, Saskia; Sokurenko, German; Leizorovicz, Alain

    2010-01-01

    BACKGROUND The efficacy and safety of anticoagulant treatment for patients with acute, symptomatic superficial-vein thrombosis in the legs, but without concomitant deep-vein thrombosis or symptomatic pulmonary embolism at presentation, have not been established. METHODS In a randomized, double-blind

  12. Localization of aldosterone-producing tumours in primary aldosteronism by adrenal and renal vein catheterization

    DEFF Research Database (Denmark)

    Lund, J O; Nielsen, M D; Giese, Jacob; Gammelgaard, P A; Hasner, E; Hesse, B; Tønnesen, K H

    1980-01-01

    Regional venous plasma aldosterone concentrations were determined and assessed against concurrent arterial levels in 16 patients with primary aldosteronism. The results obtained by sampling from the left adrenal vein or the left renal vein allowed correct side prediction of the presupposed adenom...

  13. Radiologic findings of neonatal cerebral infarction related with portal vein thrombosis: case report

    International Nuclear Information System (INIS)

    A cerebral infarction in a newborn infant is not uncommon and is major cause of neonatal seizure. The author encountered one case of cerebral infarction that was assumed to be related to a portal vein thrombosis, and reports the radiology findings of a neonatal cerebral infarction and portal vein thrombosis

  14. Successful catheter directed thrombolysis of IVC and renal vein occlusive thrombus.

    LENUS (Irish Health Repository)

    McCarthy, E

    2011-11-01

    Thrombus formation is a recognised complication of IVC filter placement, however IVC and bilateral renal vein occlusion secondary to thrombus is much less common. We present a case of infrahepatic caval and bilateral renal vein occlusion secondary to thrombosis of a suprarenal IVC filter. With progressive clinical deterioration and failure of conservative medical management the patient underwent successful mechanical disruption and catheter directed thrombolysis.

  15. F9 Malmö, factor IX and deep vein thrombosis

    NARCIS (Netherlands)

    Bezemer, Irene D.; Arellano, Andre R.; Tong, Carmen H.; Rowland, Charles M.; Ireland, Helen A.; Bauer, Kenneth A.; Catanese, Joseph; Reitsma, Pieter H.; Doggen, Carine J.M.; Devlin, James J.; Rosendaal, Frits R.; Bare, Lance A.

    2009-01-01

    Background: We recently reported the association between the Malmö sequence variant in F9 (rs6048) and deep vein thrombosis. Design and Methods: We aimed to study whether the association between F9 Malmö and deep vein thrombosis is explained by linkage disequilibrium with nearby single-nucleotide

  16. Transjugular intrahepatic portosystemic shunt for the treatment of portal vein thrombus:its current status

    International Nuclear Information System (INIS)

    The prevalence of portal vein thrombosis in the general population is about 1.1%, while it is about 10%-25% in the cirrhotic patients. The severe clinical complication in patients with acute portal vein thrombosis is ischemic intestinal infarction when the thrombus extends to the mesenteric venous arch. The complications include bleeding due to gastroesophageal varices, ascites and deterioration of live function in the patients with chronic portal vein thrombosis. The recently-published Practice Guidelines indicate that the treatment of portal vein thrombosis includes anticoagulation,thrombolysis, transjugular intrahepatic portosystemic shunt (TIPS) and surgical thrombectomy. TIPS has some advantages in treating portal vein thrombus. It can directly and effectively re-canalize the occluded portal vein. Moreover, it can accelerate portal flow and prevent recurrent thrombosis after the shunt is well-established. The disadvantages of TIPS include technical difficulties and potential complications. However, percutaneous transhepatic, transsplenic and transmesenteric approaches well facilitate the TIPS procedure. Additionally, preoperative evaluation of portal vein anatomy can provide a safe and effective choice in treating patients with portal cavernoua caver who are going to receive TIPS. Nevertheless, in the absence of relevant prospective studies, the application of TIPS for the management of portal vein thrombosis is still limited. (authors)

  17. Treatment of Isolated Below the Knee Deep Vein Thrombosis.

    Science.gov (United States)

    Palareti, Gualtiero; Sartori, Michelangelo

    2016-07-01

    The natural history of isolated distal deep-vein thrombosis (IDDVT) is still uncertain, as well as the real clinical risks associated with the disease and the need for its diagnosis and treatment. While more and more IDDVTs are diagnosed in everyday clinical practice, their appropriate therapeutic management is, unfortunately, far from straightforward, and different recommendations on how patients with diagnosed IDDVT should be treated are present between expert professionals and even among international guidelines. The present article aims at briefly reviewing the issue of IDDVT therapy in general, particularly focusing on the different approaches to the treatment of the disease that have been suggested by recent guidelines, those that are currently adopted in clinical practice, and necessary future directions. PMID:27221499

  18. Superior Mesenteric Vein Thrombosis Associated with Hormonal Contraceptive Use.

    Science.gov (United States)

    Koyama, Nobuatsu

    2016-01-01

    A 44-year-old woman was admitted with a 7-day history of lower abdominal pain and nausea. Physical examination demonstrated tenderness in the lower abdomen without signs of peritonitis. There were no specific findings in the laboratory evaluation. She had a history of dysmenorrhea for 15 years and was taking a combined hormonal contraceptive containing 0.02 mg ethinyl estradiol and 3 mg drospirenone for 19 months. Contrast-enhanced computed tomography showed superior mesenteric vein thrombosis (SMVT). Systemic anticoagulant infusion was immediately administered and the symptoms disappeared within 2 days. The thrombus disappeared after 3 months. This case report suggests that early diagnosis of SMVT and immediate systemic anticoagulant therapy may reduce the rate of intestinal infarction. PMID:27462195

  19. Superior Mesenteric Vein Thrombosis Associated with Hormonal Contraceptive Use

    Science.gov (United States)

    Koyama, Nobuatsu

    2016-01-01

    A 44-year-old woman was admitted with a 7-day history of lower abdominal pain and nausea. Physical examination demonstrated tenderness in the lower abdomen without signs of peritonitis. There were no specific findings in the laboratory evaluation. She had a history of dysmenorrhea for 15 years and was taking a combined hormonal contraceptive containing 0.02 mg ethinyl estradiol and 3 mg drospirenone for 19 months. Contrast-enhanced computed tomography showed superior mesenteric vein thrombosis (SMVT). Systemic anticoagulant infusion was immediately administered and the symptoms disappeared within 2 days. The thrombus disappeared after 3 months. This case report suggests that early diagnosis of SMVT and immediate systemic anticoagulant therapy may reduce the rate of intestinal infarction. PMID:27462195

  20. The vein of the vestibular aqueduct with potential pathologic perspectives

    DEFF Research Database (Denmark)

    Friis, Morten; Sørensen, Mads Sølvsten; Qvortrup, Klaus

    2008-01-01

    HYPOTHESIS: Pathologic changes around the vein of the vestibular aqueduct (VVA) may cause obstruction to the flow of blood toward the sigmoid sinus. Furthermore, a distal obstruction of this vessel may be responsible for a development of a retrograde flow of blood with concomitant drainage...... of endolymphatic sac (ES) substances to the inner ear. BACKGROUND: The VVA is responsible for the venous drainage of the vestibular apparatus and endolymphatic duct and ES. Previous studies have linked the VVA to Ménière's disease. The aim of the present article was a 3-dimensional perspective study of the VVA...... with its adjacent anatomic structures. METHODS: In 14 rats, the VVA was examined by 3-dimensional reconstruction of 2-microm serial sections, corrosion cast technique, and scanning electron microscopy. RESULTS: From the external aperture of the vestibular aqueduct, the VVA is interposed between the ES...

  1. Combined branch retinal vein and artery occlusion in toxoplasmosis.

    Science.gov (United States)

    Aggio, Fabio Bom; Novelli, Fernando José de; Rosa, Evandro Luis; Nobrega, Mário Junqueira

    2016-01-01

    A 22-year-old man complained of low visual acuity and pain in his left eye for five days. His ophthalmological examination revealed 2+ anterior chamber reaction and a white, poorly defined retinal lesion at the proximal portion of the inferotemporal vascular arcade. There were retinal hemorrhages in the inferotemporal region extending to the retinal periphery. In addition, venous dilation, increased tortuosity, and ischemic retinal whitening along the inferotemporal vascular arcade were also observed. A proper systemic work-up was performed, and the patient was diagnosed with ocular toxoplasmosis. He was treated with an anti-toxoplasma medication, and his condition slowly improved. Inferior macular inner and middle retinal atrophy could be observed on optical coherence tomography as a sequela of ischemic injury. To our knowledge, this is the first report of combined retinal branch vein and artery occlusion in toxoplasmosis resulting in a striking and unusual macular appearance. PMID:27463632

  2. Superior mesenteric vein rotation: a CT sign of midgut malrotation

    Energy Technology Data Exchange (ETDEWEB)

    Nichols, D.M. (Vancouver General Hospital, Canada); Li, D.K.

    1983-10-01

    Computed tomography (CT) of the pancreas, with its excellent display of peripancreatic anatomy, allows visualization of the major vessels entering the mesenteric root. In scans of the normal upper abdomen obtained at or just below the level of the uncinate process of the pancreas, the proximal superior mesenteric vein (SMV) easily can be identified lying on the right ventral aspect of the superior mesenteric artery (SMA). The authors have observed a characteristic abnormality in this normal vascular arrangement on CT scans of the pancreas in three adult patients with suspected chronic pancreatitis who were subsequently proved to have midgut malrotation. They called this the SMV rotation sign and believe that its detection even on CT scans limited to the level of the pancreas should alert the radiologist to the presence of a midgut malrotation that may have been unsuspected.

  3. In situ saphenous vein bypass surgery in diabetic patients

    DEFF Research Database (Denmark)

    Jensen, L P; Schroeder, T V; Lorentzen, J E

    1992-01-01

    or foot. Diabetic patients had a significantly lower distal anastomosis than non-diabetic patients (p = 0.0001). The overall 3-year primary and secondary patency rates were 58 and 64%, respectively, with no differences between non-diabetics, non-insulin-dependent diabetics and insulin......From 1986 through to 1990 a total of 483 consecutive in situ infra-inguinal vein bypass procedures were performed in 444 patients, of whom 112 (25%) were diabetics (57 insulin dependent diabetes mellitus and 55 non-insulin-dependent diabetes mellitus). Based on a prospective vascular data registry...... this material was analysed to determine the influence of diabetes on the outcome. Preoperative risk factors were equally distributed among diabetic and non-diabetic patients, except for smoking habits (diabetics: 48%; non-diabetics: 64%, p = 0.002) and cardiac disease (diabetics: 45%; non-diabetics: 29...

  4. Attention to the application of vein anaesthesia in interventional radiology

    International Nuclear Information System (INIS)

    Interventional radiology is mostly carried out under local anesthesia with micro invasive characteristics. However, the questions of patient's pain, nerve intense, change of blood pressure and heart rate always influence the performance of operation. General anaesthesia in interventional radiology is a comparatively simple venous anaesthesia modality with a controlled dose of anesthetics injecting via periphery vein through persistent minimally injecting pump to keep the patient in dormancy under electrocardiographic monitoring. It doesn't require a tube insertion of trachea. The anaesthesia depth and time are under control. The half-life of the anaesthesia drugs is short with less side-effect. It is necessary to introduce the advanced anaesthesia into common interventional radiological therapy with attentions of promoting the development through new modalities. (authors)

  5. Formation of quartz veins by local dissolution and transport of silica

    Energy Technology Data Exchange (ETDEWEB)

    Wangen, Magnus; Munz, Ingrid Anne

    2004-08-01

    A simple model is proposed for the (often) thick quartz veins observed in the Modum Complex in Southern Norway. The formation of these veins cannot easily be explained by silica imported by hot ascending fluids. The proposed model has dissolution in the host rock adjacent to the veins as the source for silica. The suggested process for vein formation is represented by a reaction-diffusion equation, and the process is studied in terms of a Damkoehler number. Estimates for the growth rate of quartz cement are derived. The estimates for the growth rate can be used to constrain poorly known parameters of the vein formation process, like for instance, the degree of supersaturation in the host rock. (Author)

  6. SONOGRAPHICAL ASSESSMENT OF PORTAL VEIN DIAMETER IN NORTHERN PART OF WEST BENGAL, INDIA

    Directory of Open Access Journals (Sweden)

    Jayanta Bhattacharya

    2013-09-01

    Full Text Available Measurement of the diameter of the portal vein may be particularly important in detecting and evaluating patients with portal hypertension as well as some other clinical disorders. But there is paucity of data regarding normal portal vein diameter in northern part of West Bengal, India. Therefore this study was undertaken to throw light into this matter. In this work, we analyzed retrospectively the data regarding portal vein diameter obtained from 2D-Ultrasound of whole abdomen from 500 adults aged between 20 to 50 years of both sexes (male 276, female 224. All the cases met our selection criteria. The results were tabulated and analyzed statistically. The mean diameter of portal vein in male subjects was 10.37 + 1.03 mm and in females it was 9.82 + 1.01 mm. A standard for normal portal vein diameter has been set up which may help clinicians to detect and evaluate several clinical situations.

  7. Continuous Perfusion of Saphenous Vein by Oxygenated Blood during Beating Coronary Surgery

    Directory of Open Access Journals (Sweden)

    Mohammad Hossein Mandegar

    2015-09-01

    Full Text Available Background: The saphenous vein remains the most commonly used conduit for coronary artery bypass surgery (CABG. However, the long-term success of surgical revascularization is largely limited by development of occlusion in vein grafts. Objectives: We sought to reduce graft ischemia by maintaining the blood flow into the harvested vein throughout surgery at lowest costs and without special devices. Patients and Methods: This study was conducted on three hundred patients aged 58.5 ± 8 years undergoing elective first-time off-pump CABG with saphenous veins. Results: In addition to preserving nutritional materials and oxygen, the veins harvested via this novel technique did not go into spasm and were not subjected to high-pressure distension, eventually resulting in minimal damage to the endothelium. Conclusions: This technique confers favorable myocardial function and protection in the presence of left ventricular dysfunction, especially in elderly patients.

  8. Iliac vein compression syndrome from anterior perforation of a pedicle screw

    Science.gov (United States)

    Woo, Edward J.; Ogilvie, Ross A.; Krueger, Van Schaumburg; Lundin, Michael; Williams, David M.

    2016-01-01

    May–Thurner syndrome is an anatomic variant where the right common iliac artery compresses the left common iliac vein. The variant exists in a significant portion of the population, but is usually asymptomatic; however, clinically significant stenosis can occur by iatrogenic means. In this report, we describe a patient who presents with left lower extremity pain and swelling. Initial workup for deep vein thrombosis was negative. After being referred to our venous clinic, a magnetic resonance angiography revealed narrowing of the left common iliac vein with a tortuous right common iliac artery crossing over the constriction. During left iliac vein stent placement, a pedicle screw from a prior L2–S1 spinal fusion was noted to be perforated through L5 vertebral body impinging the posterior aspect of the vein. This case demonstrates that increased scrutiny must be applied when dealing with pathology in close proximity to any implanted medical device. PMID:26912480

  9. Iliac vein compression syndrome from anterior perforation of a pedicle screw.

    Science.gov (United States)

    Woo, Edward J; Ogilvie, Ross A; Krueger, Van Schaumburg; Lundin, Michael; Williams, David M

    2016-01-01

    May-Thurner syndrome is an anatomic variant where the right common iliac artery compresses the left common iliac vein. The variant exists in a significant portion of the population, but is usually asymptomatic; however, clinically significant stenosis can occur by iatrogenic means. In this report, we describe a patient who presents with left lower extremity pain and swelling. Initial workup for deep vein thrombosis was negative. After being referred to our venous clinic, a magnetic resonance angiography revealed narrowing of the left common iliac vein with a tortuous right common iliac artery crossing over the constriction. During left iliac vein stent placement, a pedicle screw from a prior L2-S1 spinal fusion was noted to be perforated through L5 vertebral body impinging the posterior aspect of the vein. This case demonstrates that increased scrutiny must be applied when dealing with pathology in close proximity to any implanted medical device. PMID:26912480

  10. Congenital Agenesis of the Internal Jugular Vein: An Extremely Rare Anomaly

    Directory of Open Access Journals (Sweden)

    Oguz Kayiran

    2015-01-01

    Full Text Available Vascular anomalies of major venous vessels are rarely seen. Moreover, congenital absence of internal jugular vein is extremely uncommon. In our case, a female patient presented with primary unknown left cervical mass. Cervical ultrasonography demonstrated absence of right internal jugular vein. In addition, computed tomography and dynamic magnetic resonance imaging scans confirmed this diagnosis. Compensatory left internal jugular vein enlargement mimicked sort of cervical mass. Venous magnetic resonance imaging images revealed the absence of right internal jugular vein with compensatory left internal jugular vein dominance. In the literature, the agenesis of IJV was mentioned in a case with concomitant multiple problems. Here, an asymptomatic case is reported with an incident diagnosis. No interventions were planned upon the patient's request. It should be kept in mind that any kind of anomalies can be seen during venous access and neck surgery.

  11. Effective Endovascular Stenting of Malignant Portal Vein Obstruction in Pancreatic Cancer

    Directory of Open Access Journals (Sweden)

    Christian M. Ellis

    2009-01-01

    Full Text Available We report herein the case of a patient successfully treated by transhepatic portal venous stent placement for malignant portal vein obstruction with associated gastric and small bowel varices and repeated gastrointestinal bleeding. CT angiography and portography showed severe portal vein obstruction from recurrent pancreatic cancer 15 months following pancreaticoduodenectomy with tumor encasement and dilated collateral veins throughout the gastric and proximal small bowel wall as the suspected cause of the GI bleeding. Successful transhepatic endovascular stent placement of the splenic vein at the portal vein confluence followed by balloon dilation was performed with immediate decompression of the gastric and small bowel varices and relief of GI hemorrhage in this patient until his death four months later. The treatment for patients with this dilemma can prove to be difficult, but as we have shown endovascular stenting of the portal system is an effective treatment option.

  12. MR Venography of Deep Veins: Changes with Uterine Fibroid Embolization

    International Nuclear Information System (INIS)

    Deep veins (DVs) can be compressed by a uterus enlarged with fibroids. The purpose of this study was to assess the degree of luminal narrowing of DVs caused by a myomatous uterus, and the change in DV narrowing in women with symptomatic fibroids after embolization using time-of-flight (TOF)-magnetic resonance venography (MRV). Twenty-nine consecutive women with symptomatic uterine fibroids underwent TOF-MRV and pelvic MRI before and 4 months after embolization. Based on the TOF-MRV, we evaluated the luminal narrowing of three DVs, including the inferior vena cava, and the bilateral common and external iliac veins, and divided the findings into three grades. The scores for each DV were added for each patient (lowest, 0; highest, 6). DV scores and symptom severity (SS) scores were compared between the baseline and 4 months after embolization using the paired t-test. The relationship between DV scores and uterine volume was investigated using Pearson's test. DV scores decreased significantly, from 1.52 ± 1.70 at baseline to 0.93 ± 1.56 at 4 months after embolization (p = 0.004). The uterine volume decreased from 948 ± 647 mL at baseline to 617 ± 417 mL at 4 months after embolization (p < 0.001). DV score correlated with uterine volume (r = 0.856, p < 0.001). SS scores decreased from 54.5 ± 14.6 at baseline to 26.8 ± 15.4 at 4 months after embolization (p < 0.001). In conclusion, the degree of luminal narrowing of DVs caused by a uterus with fibroids is correlated with the uterine volume. Uterine artery embolization may induce an improvement of luminal narrowing of DVs due to a reduction of the myomatous uterus volume.

  13. Diagnostic and therapeutic aspects of deep vein thrombosis

    International Nuclear Information System (INIS)

    51 out-patients presenting with calf-vein thrombosis were randomized to treatment with heparin for five days or heparin with subsequent warfarin for three months. Among 23 patients in the warfarin-group no recurrence occurred, whereas 8 of the 28 patients (29%) in the non-warfarin group had recurrent thrombo-embolism during the first 90 days. It is concluded that patients with symptomatic calf-vein thrombi should be treated with both heparin and oral anticoagulation. In a prospective study of X-ray contrast media, post-phlebographic reactions occurred in 7 of 19 patients (37%) investigated with a high-osmolality contrast medium metrizoate whereas no such reaction occurred among 24 patients investigated with a low-osmolality contrast medium iohexol. Thus, low-osmolatily contrast media should preferably be used at phlebography. 396 out-patients with suspected venous thrombosis were investigated with the 99mTc-plasmin test, physical examination and phlebography. The plasmin test has a high sensitivity (95%) but a low specificity (47%), and was frequently abnormal when clinical signs of inflammation were present. Clinical signs could not accurately predict if thrombosis was present, although subpopulations of patients with high or low probability of venous thrombosis could be identified. 112 patients with suspected DVT were investigated with thermography. Both sensitivity and specificity were low (77% and 66% respectively) and thermography therefore seems not to be useful in the diagnosis of symptomatic venous thrombosis. Long-term sequelae after a first episode of venous thrombosis are mostly mild as long as 6 years after the diagnosis. Venous function correlated to the extension of the thrombus but no to subjective symptoms. Clinical signs at diagnosis could not predict the late outcome. During the six years of follow-up, 28% of the patients had recurrent thrombosis. (158 refs.) (au)

  14. Transjugular Endovascular Recanalization of Splenic Vein in Patients with Regional Portal Hypertension Complicated by Gastrointestinal Bleeding

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Xuefeng; Nie, Ling; Wang, Zhu; Tsauo, Jiaywei; Tang, Chengwei; Li, Xiao, E-mail: simonlixiao@126.com [West China Hospital, Sichuan University, Department of Gastroenterology (China)

    2013-05-02

    PurposeRegional portal hypertension (RPH) is an uncommon clinical syndrome resulting from splenic vein stenosis/occlusion, which may cause gastrointestinal (GI) bleeding from the esophagogastric varices. The present study evaluated the safety and efficacy of transjugular endovascular recanalization of splenic vein in patients with GI bleeding secondary to RPH.MethodsFrom December 2008 to May 2011, 11 patients who were diagnosed with RPH complicated by GI bleeding and had undergone transjugular endovascular recanalization of splenic vein were reviewed retrospectively. Contrast-enhanced computed tomography revealed splenic vein stenosis in six cases and splenic vein occlusion in five. Etiology of RPH was chronic pancreatitis (n = 7), acute pancreatitis with pancreatic pseudocyst (n = 2), pancreatic injury (n = 1), and isolated pancreatic tuberculosis (n = 1).ResultsTechnical success was achieved in 8 of 11 patients via the transjugular approach, including six patients with splenic vein stenosis and two patients with splenic vein occlusion. Two patients underwent splenic vein venoplasty only, whereas four patients underwent bare stents deployment and two covered stents. Splenic vein pressure gradient (SPG) was reduced from 21.5 ± 7.3 to 2.9 ± 1.4 mmHg after the procedure (P < 0.01). For the remaining three patients who had technical failures, splenic artery embolization and subsequent splenectomy was performed. During a median follow-up time of 17.5 (range, 3–34) months, no recurrence of GI bleeding was observed.ConclusionsTransjugular endovascular recanalization of splenic vein is a safe and effective therapeutic option in patients with RPH complicated by GI bleeding and is not associated with an increased risk of procedure-related complications.

  15. Toward an Optimal Position for IVC Filters: Computational Modeling of the Impact of Renal Vein Inflow

    Energy Technology Data Exchange (ETDEWEB)

    Wang, S L; Singer, M A

    2009-07-13

    The purpose of this report is to evaluate the hemodynamic effects of renal vein inflow and filter position on unoccluded and partially occluded IVC filters using three-dimensional computational fluid dynamics. Three-dimensional models of the TrapEase and Gunther Celect IVC filters, spherical thrombi, and an IVC with renal veins were constructed. Hemodynamics of steady-state flow was examined for unoccluded and partially occluded TrapEase and Gunther Celect IVC filters in varying proximity to the renal veins. Flow past the unoccluded filters demonstrated minimal disruption. Natural regions of stagnant/recirculating flow in the IVC are observed superior to the bilateral renal vein inflows, and high flow velocities and elevated shear stresses are observed in the vicinity of renal inflow. Spherical thrombi induce stagnant and/or recirculating flow downstream of the thrombus. Placement of the TrapEase filter in the suprarenal vein position resulted in a large area of low shear stress/stagnant flow within the filter just downstream of thrombus trapped in the upstream trapping position. Filter position with respect to renal vein inflow influences the hemodynamics of filter trapping. Placement of the TrapEase filter in a suprarenal location may be thrombogenic with redundant areas of stagnant/recirculating flow and low shear stress along the caval wall due to the upstream trapping position and the naturally occurring region of stagnant flow from the renal veins. Infrarenal vein placement of IVC filters in a near juxtarenal position with the downstream cone near the renal vein inflow likely confers increased levels of mechanical lysis of trapped thrombi due to increased shear stress from renal vein inflow.

  16. Antique SVG with two humps: a case of two giant aneurysms of single saphenous vein bypass graft.

    Science.gov (United States)

    Kurita, Tairo; Kitamura, Tetsuya; Yamanaka, Takashi; Tanabe, Masaki; Dohi, Kaoru; Tanigawa, Takashi; Onishi, Katsuya; Ito, Masaaki; Isaka, Naoki; Nakano, Takeshi

    2007-03-20

    Saphenous vein graft aneurysms are a rare complication of coronary artery bypass surgery. In this article, we present a 3-dimensional computed tomography image of two giant aneurysms of a single saphenous vein bypass graft. PMID:17070939

  17. Is Rhythm Control with Pulmonary Vein Isolation Superior to Rate Control with AV Nodal Ablation in Patients with Heart Failure?

    Directory of Open Access Journals (Sweden)

    Dhanunjaya Lakkireddy MD, FACC

    2008-12-01

    Full Text Available Pulmonary-vein isolation is increasingly being used to treat atrial fibrillation in patients with heart failure. Is Pulmonary vein isolation better than AV nodal ablation with bi-ventricular pacing in patients with heart failure?

  18. Percutaneous Antegrade Varicocele Embolization Via the Testicular Vein in a Patient with Recurrent Varicocele After Surgical Repair

    Energy Technology Data Exchange (ETDEWEB)

    Guevara, Carlos J., E-mail: guevarac@mir.wustl.edu; El-Hilal, Alexander H., E-mail: elhilala@mir.wustl.edu; Darcy, Michael D., E-mail: darcym@mir.wustl.edu [Washington University in St. Louis, Department of Radiology, School of Medicine (United States)

    2015-10-15

    This is a case report of an adolescent male who underwent surgical ligation for a left-sided varicocele that recurred 2 years later. Standard retrograde embolization via the left renal vein was not possible, because there was no connection from the renal vein to the gonadal vein following surgical ligation. The patient was treated via antegrade access of the spermatic vein at the inguinal level with subsequent coil embolization.

  19. Conduction recovery in patients with recurrent atrial fibrillation after pulmonary vein isolation using multi-electrode duty cycled radiofrequency ablation

    NARCIS (Netherlands)

    Balt, J.C.; Karadavut, S.; Mulder, A.A.W.; Luermans, J.G.; Wijffels, M.C.; Boersma, L.V.

    2013-01-01

    INTRODUCTION: The pulmonary vein ablation catheter (PVAC) is designed for pulmonary vein isolation (PVI). Electrical reconnection of pulmonary veins is believed to result in AF recurrence. The purpose of this study was to establish the location and extent of PV reconnection after PVI with the PVAC c

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    Lifescience Database Archive (English)

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  13. A structural analysis of the Minas da Panasqueira vein network and related fracture generations

    Science.gov (United States)

    Jacques, Dominique; Vieira, Romeu; Muchez, Philippe; Sintubin, Manuel

    2014-05-01

    The Minas da Panasqueira is a world-class W-Cu-Sn vein-type deposit, situated within the Central Iberian Zone of the Palaeozoic Iberian Massif (Portugal). The deposit consists of a network of subhorizontal, sill-like massive quartz veins situated above the southwestern extremity of a greisen cupola, within regionally metamorphosed, isoclinally folded, lower-greenschist slates and greywackes. The greisen cupola is part of a larger intrusive complex, emplaced during the late- to post-tectonic stage of the Variscan orogeny. The late-Variscan granitoid(s) underlying the Panasqueira deposit is considered to have served as a major metal source. The structure of the network of subhorizontal extension veins, consists of numerous planar vein lobes that are separated by host-rock bridges and merge at branch-points. A structural analysis demonstrates that not only within the Panasqueira mine, but also on a more regional scale, one or more generations of flat-lying fractures are present. The veins clearly exploited these pre-existing discontinuities, as confirmed by (1) the vein geometry being directly influenced by variations in the orientation of the initial fracture sets and (2) the geometry of the rock bridges and overlapping vein morphologies, consistently showing straight-line propagating crack tips. If veining is governed by a preferential, strongly developed anisotropy in the host rock, the hypothesis of vein lobes and rock bridges forming during propagation of the parent crack by tip-line bifurcation and confinement processes (Foxford et al., 2000) does not seem plausible. Instead, we propose that the rock bridges formed from several, initially separate and small veinlets that eventually overlapped in an en echelon arrangement during progressive propagation and inflation. Bending of the rock bridges and incipient vein rotation indicate that veining occurred near the brittle-ductile transition. Using a quantitative analysis of bridge orientations, vein aspect ratios

  14. Paleomagnetic dating of fracturing using breccia veins in Durness group carbonates, NW Scotland

    Science.gov (United States)

    Douglas Elmore, R.; Burr, Rika; Engel, Michael; Parnell, John

    2010-12-01

    A paleomagnetic study of red fault-related breccia veins in the Cambro-Ordovician Durness Group in NW Scotland was conducted to determine the time of brecciation, the origin of the veins, and the nature and timing of associated fluid-related diagenetic alteration. The veins contain brecciated fragments of the host Durness Group and strike either east-west or north-south. Clasts of breccia cemented by calcite suggest multiple brecciation events. The host Durness Limestone is a gray dolomite and contains a Devonian chemical remanent magnetization (CRM) that resides in magnetite. The veins contain magnetizations that reside in hematite and are interpreted as CRMs. The breccias in north-south veins contain a Triassic CRM whereas the veins with east-west strikes contain a Jurassic CRM. Authigenic hematite is common in the breccias along growth planes in the calcite cements. The two CRMs within the veins are interpreted as dating two separate brecciation and fluid flow events that precipitated authigenic hematite. The brecciation and fluid flow events are interpreted to be related to extension in the Mesozoic which is consistent with the extensional history of the northern Atlantic margins.

  15. Inherent rhythmcity and interstitial cells of Cajal in a frog vein

    Indian Academy of Sciences (India)

    Dipanwita Ghose; Lingu Jose; S Manjunatha; Muddanna S Rao; J Prakasa Rao

    2008-12-01

    Interstitial cells of Cajal are responsible for rhythmic contractions of the musculature of the gastrointestinal tract and blood vessels. The existence of these cells and spontaneous rhythmicity were noticed in amphibian vein and the findings are reported in this paper. The postcaval vein was identified in the frog, Rana tigrina and was perfused with amphibian Ringer solution after isolation. Contractile activity was recorded through a tension transducer connected to a polygraph. The isolated postcaval vein showed spontaneous rhythmic activity. Addition of cold Ringer solution decreased, while warm Ringer increased, the rate of contraction. Adrenaline caused inhibition of rhythmic activity at a dosage that increased the rate of isolated sinus venosus. Sections of the postcaval vein, when stained supravitally with methylene blue, showed the presence of interstitial cells of Cajal. Photic stimulation of the vein in the presence of methylene blue led to a significant decrease in the rate of spontaneous beating of the vein. These findings indicate that the postcaval vein of frog is capable of inherent rhythmcity, which is dependent on the interstitial cells of Cajal but is independent of the sinus venosus.

  16. Doppler study of hepatic vein in cirrhotic patients: Correlation with liver dysfunction and hepatic hemodynamics

    Institute of Scientific and Technical Information of China (English)

    KC Sudhamshu; Shoiichi Matsutani; Hitoshi Maruyama; Taro Akiike; Hiromitsu Saisho

    2006-01-01

    AIM: To elucidate the significance of Doppler measurements of hepatic vein in cirrhotic patients and to correlate with liver dysfunction and hepatic hemodynamics.METHODS: One hundred patients with liver cirrhosis and 60 non-cirrhotic controls were studied. Doppler waveforms were obtained from right hepatic vein and flow velocity measured during quiet respiration. Doppler measurements were also obtained from portal trunk,right portal vein and proper hepatic artery.RESULTS: Hepatic vein waveforms were classified into three classical patterns. Flat waveform was uncommon.Mean hepatic vein velocity was significantly higher in cirrhotic patients (12.7 ± 6.4 vs 5.1 ± 2.1 and 6.2 ± 3.2 cm/s; P < 0.0001). The poorer the grade of cirrhosis,the higher was the mean velocity. Maximum forward velocity was never greater than 40 cm/s in controls.Degree of ascites was found to be highly correlated with mean velocity. "Very high" group (≥ 20 cm/s) presented clinically with moderate to massive ascites. Correlations between right portal flow and mean velocity was significant (P < 0.0001, r = 0.687).CONCLUSION: Doppler waveforms of hepatic vein,which is independent of liver dysfunction, should be obtained during normal respiration. Mean hepatic vein velocity reflects the change in hepatic circulation associated with progression of liver cirrhosis. It can be used as a new parameter in the assessment of liver cirrhosis.

  17. A rare case of anastomosis between the external and internal jugular veins

    Directory of Open Access Journals (Sweden)

    Karapantzos I

    2016-03-01

    Full Text Available Ilias Karapantzos,1 Paul Zarogoulidis,2 Charalampos Charalampidis,3 Chrysanthi Karapantzou,1 Ioannis Kioumis,2 Kosmas Tsakiridis,4 Andrew Mpakas,4 Nikolaos Sachpekidis,4 John Organtzis,2 Konstantinos Porpodis,2 Konstantinos Zarogoulidis,2 Georgia Pitsiou,2 Athanasios Zissimopoulos,5 Christoforos Kosmidis,6 Evagelia Fouka,2 Theodoros Demetriou31Ear, Nose and Throat Department, “Saint Luke” Private Hospital, Panorama, 2Pulmonary Department, “G. Papanikolaou” General Hospital, Aristotle University of Thessaloniki, Thessaloniki, 3Department of Anatomy, Democritus University of Thrace, Alexandroupolis, 4Cardiothoracic Surgery Department, “Saint Luke” Private Hospital, Panorama, Thessaloniki, 5Nuclear Medicine Department, University General Hospital of Alexandroupolis, Democritus University of Thrace, Alexandroupolis, 6Surgery Department, “Interbalkan” European Medical Center, Thessaloniki, GreeceAbstract: Jugular veins bring deoxygenated blood from the head back to the heart. There are two sets of external and internal veins. The external jugular vein receives the greater part of the blood from the cranium and the deep parts of the face. It commences from the substance of the parotid gland and runs down the neck at the posterior border of sternocleidomastoideus and ends in the subclavian vein in front of the scalenus anterior. The external jugular vein is covered by the platysma and its upper half runs parallel with the great auricular nerve. There is also another minor jugular vein, the anterior, draining the submaxillary region. In our patient, we recognized a shunt between the external and internal jugular veins. It appeared in the middle of the veins, between the pair of valves, which are placed ~2.5 cm above the termination of the vessel. The anastomosis was fully functional, and there was no problem in the blood pressure of the patient. Moreover, the shunt was not associated with any systemic disease.Keywords: jugular veins

  18. Anatomy of the portal branches and the hepatic veins in the caudate lobe of the liver.

    Science.gov (United States)

    Ortale, J R; Borges Keiralla, L C

    2004-10-01

    The objective of this study was to analyze the caudate portal branches and their relationships with the hepatic caudate veins and propose a new nomenclature for the caudate branches based on their territory of distribution. We realized the fine dissection of the veins of the caudate lobe in 40 human livers fixed and preserved in formalin. In 15/40 (37.5%) cases there was a single branch to the caudate lobe. In 25/40 (62.5%) cases there was more than one branch, with a posterior caudate branch in 20/40 (50%) cases, an anterior caudate branch in 15/40 (37.5%) cases, a left caudate branch in 14/40 (35%) cases, and a right caudate branch in 8/40 (20%) cases. The most frequent combination detected (11/40, 27.5% of cases) was that of the posterior and anterior branches. The venous drainage of the caudate lobe and its papillary process was provided by the superior caudate hepatic vein in 23/40 (57.5%) cases, by the middle caudate vein in 35/40 (87.5%) cases (which was the only vein in 12/35 cases), and by the inferior caudate vein in 16/40 (40%) cases. In 11/40 (12.5%) cases there were accessory caudate veins, which emptied into the left and intermediate hepatic veins. The portal branches and the hepatic veins related to the caudate process were studied. In conclusion, the new nomenclature analyzes more precisely the distribution of the caudate portal branches. PMID:15300411

  19. Vein visualization using a smart phone with multispectral Wiener estimation for point-of-care applications.

    Science.gov (United States)

    Song, Jae Hee; Kim, Choye; Yoo, Yangmo

    2015-03-01

    Effective vein visualization is clinically important for various point-of-care applications, such as needle insertion. It can be achieved by utilizing ultrasound imaging or by applying infrared laser excitation and monitoring its absorption. However, while these approaches can be used for vein visualization, they are not suitable for point-of-care applications because of their cost, time, and accessibility. In this paper, a new vein visualization method based on multispectral Wiener estimation is proposed and its real-time implementation on a smart phone is presented. In the proposed method, a conventional RGB camera on a commercial smart phone (i.e., Galaxy Note 2, Samsung Electronics Inc., Suwon, Korea) is used to acquire reflectance information from veins. Wiener estimation is then applied to extract the multispectral information from the veins. To evaluate the performance of the proposed method, an experiment was conducted using a color calibration chart (ColorChecker Classic, X-rite, Grand Rapids, MI, USA) and an average root-mean-square error of 12.0% was obtained. In addition, an in vivo subcutaneous vein imaging experiment was performed to explore the clinical performance of the smart phone-based Wiener estimation. From the in vivo experiment, the veins at various sites were successfully localized using the reconstructed multispectral images and these results were confirmed by ultrasound B-mode and color Doppler images. These results indicate that the presented multispectral Wiener estimation method can be used for visualizing veins using a commercial smart phone for point-of-care applications (e.g., vein puncture guidance). PMID:24691170

  20. Clinical evaluation of interventional treatment for Budd-Chiari syndrome with hepatic vein thrombosis

    International Nuclear Information System (INIS)

    Objective: To evaluate the effect of interventional therapy for Budd-Chiari syndrome with hepatic vein thrombosis. Methods: Twenty-five patients with Budd-Chiari syndrome complicated with hepatic vein thrombosis underwent catheter-directed urokinase thrombolysis, balloon dilation and/or stent placement. During follow-up, re-thrombosis and patency of the recanalized hepatic vein and inferior vena cava were evaluated by liver ultrasound. The pressure gradient of hepatic vein-right atrium or inferior vena cava-right atrium before and after interventional treatment was compared with paired t-test. Results: Technical success was obtained in 23 patients. Complete resolution and partial resolution of the thrombi were accomplished in 18 cases and 5 cases, respectively. The recanalized hepatic veins and inferior vena cava were patent. The mean pressure gradient of hepatic vein-right atrium dropped from (29±7) cm H2O to (8±3) cm H2O (1 cm H2O =0.098 kPa) after the interventional treatment (t= 13.7, P2O to (5±2) cm H2O after the interventional treatment (t= 13.3, P<0.01). Failures occurred in 2 patients. Over the follow-up period of 1 to 42 months [(18±10) months] after interventional treatment in the 23 patients, one late death occurred. Restenosis of hepatic veins were found in 2 patients, which were all redilated successfully. Neither restenosis of hepatic vein nor recurrence of thrombosis was found in the other 20 patients. Conclusion: Interventional therapy could be effectively performed for the treatment of Budd-Chiari syndrome with hepatic vein thrombosis. (authors)

  1. Bone Marrow Mesenchymal Stem Cell and Vein Conduit on Sciatic Nerve Repair in Rats

    Science.gov (United States)

    Seyed Foroutan, Kamal; Khodarahmi, Ali; Alavi, Hootan; Pedram, Sepehr; Baghaban Eslaminejad, Mohamad Reza; Bordbar, Sima

    2015-01-01

    Background: Peripheral nerve repair with sufficient functional recovery is an important issue in reconstructive surgery. Stem cells have attracted extensive research interest in recent years. Objectives: The purpose of this study was to compare the vein conduit technique, with and without the addition of mesenchymal stem cells in gap-less nerve injury repair in rats. Materials and Methods: In this study, 36 Wistar rats were randomly allocated to three groups: In the first group, nerve repair was performed with simple neurorrhaphy (control group), in the second group, nerve repair was done with vein conduit over site (vein conduit group) and in the third group, bone marrow stem cells were instilled into the vein conduit (stem cell group) after nerve repair with vein conduit over site. Six weeks after the intervention, the sciatic function index, electrophysiological study and histological examination were performed. Results: All animals tolerated the surgical procedures and survived well. The sciatic function index and latency were significantly improved in the vein conduit (P = 0.04 and 0.03, respectively) and stem cell group (P = 0.02 and 0.03, respectively) compared with the control group. No significant difference was observed in sciatic function and latency between the vein conduit and stem-cell groups. Moreover, histological analysis showed no significant difference in regenerative density between these two groups. Conclusions: The results of this study showed that the meticulous microsurgical nerve repair, which was performed using the vein tubulization induced significantly better sciatic nerve regeneration. However, the addition of bone marrow mesenchymal stem cell to vein conduit failed to promote any significant changes in regeneration outcome. PMID:25825699

  2. Double suicide genes selectively kill human umbilical vein endothelial cells

    Directory of Open Access Journals (Sweden)

    Liu Lunxu

    2011-02-01

    Full Text Available Abstract Background To construct a recombinant adenovirus containing CDglyTK double suicide genes and evaluate the killing effect of the double suicide genes driven by kinase domain insert containing receptor (KDR promoter on human umbilical vein endothelial cells. Methods Human KDR promoter, Escherichia coli (E. coli cytosine deaminase (CD gene and the herpes simplex virus-thymidine kinase (TK gene were cloned using polymerase chain reaction (PCR. Plasmid pKDR-CDglyTK was constructed with the KDR promoter and CDglyTK genes. A recombinant adenoviral plasmid AdKDR-CDglyTK was then constructed and transfected into 293 packaging cells to grow and harvest adenoviruses. KDR-expressing human umbilical vein endothelial cells (ECV304 and KDR-negative liver cancer cell line (HepG2 were infected with the recombinant adenoviruses at different multiplicity of infection (MOI. The infection rate was measured by green fluorescent protein (GFP expression. The infected cells were cultured in culture media containing different concentrations of prodrugs ganciclovir (GCV and/or 5-fluorocytosine (5-FC. The killing effects were measured using two different methods, i.e. annexin V-FITC staining and terminal transferase-mediated dUTP nick end-labeling (TUNEL staining. Results Recombinant adenoviruses AdKDR-CDglyTK were successfully constructed and they infected ECV304 and HepG2 cells efficiently. The infection rate was dependent on MOI of recombinant adenoviruses. ECV304 cells infected with AdKDR-CDglyTK were highly sensitive to GCV and 5-FC. The cell survival rate was dependent on both the concentration of the prodrugs and the MOI of recombinant adenoviruses. In contrast, there were no killing effects in the HepG2 cells. The combination of two prodrugs was much more effective in killing ECV304 cells than GCV or 5-FC alone. The growth of transgenic ECV304 cells was suppressed in the presence of prodrugs. Conclusion AdKDR-CDglyTK/double prodrog system may be a useful

  3. CLINICAL STUDY OF RETINAL VEIN OCCLUSIONS AND MANAGEMENT

    Directory of Open Access Journals (Sweden)

    Satyavathi

    2015-01-01

    Full Text Available Retinal vein occlusion is the most common retinal occlusive disorder encountered by Ophthalmologists and is usually associated with a variable amount of visual loss. This is the second most common retinal vascular disease next to diabetic retinopathy. Liebreich initially described dramatic obstruction of veins as retinal apoplexy. Leber ( 1 (1877 reported the first case of BRVO and called it Hem orrhagic retinitis. RVO most commonly affects the venous blood supply of the entire retina (CRVO or a quadrant drained by one of the branches (BRVO or less commonly the superior or inferior half of the retina alone is affected (HCRVO. For discussion and management purpose RVO is broadly classified into six clinical entities includes (1 Non - ischemic CRVO (2 Ischemic CRVO (3 Non ischemic HCRVO (4Ischemic HCRVO (5 Major BRVO (6Macular BRVO. So much of confusion still exists regarding its natural histo ry, degree of severity, management and its progression. The clinical study of RVO is taken up mainly with a view to study the importance of systemic risk factors in etiopathogenisis of RVO, to study the clinical features and effectiveness of treatment in m odification of the natural course and complications of RVO. Depending on type of venous occlusion patient may present with loss of central vision frequently noticed on waking up in the morning, or field contraction, erythropsia, floates, black spots. Episo des of amaurosis fugax lasts for minutes to hours may be present. There may be metamor - phopsia. Signs of decreased visual acuty, RAPD, visual field defects are observed. Fundus picture shows Retinal hemorrhages distributed based on type of venous occlusion . In ischemic CRVO the picture shows “berries on a twig”. Various sequel & complications include macular edema, anterior segment and retinal neovascularisation, vitreous hemorrhage, retinal detachment may be encountered. Various risk factors include Hypert ension, Diabetes, Hyper lipidemia, IHD

  4. Digital subtraction phlebography of the arm veins and vena cava superior

    International Nuclear Information System (INIS)

    We report on the results of 40 digital subtraction phlebograms of the great veins of the upper extremities and the mediastinum in 32 patients. In all cases diagnostic satisfactory examinations were achieved that demonstrated the anatomy of the veins in question. The method can be either used for the primary diagnosis or for controls during lysis of thrombotic lesions. The v. cava superior could be opacified even after ipsilateral injection of diluted contrast media in one-sided thrombotic occlusions of these veins. (orig.)

  5. Leiomyosarcoma of the femoral vein mimicking a peripheral nerve sheath tumor: a case report

    International Nuclear Information System (INIS)

    Primary vascular leiomyosarcoma is a rare malignant tumor arising from the smooth muscle cells of the media on the vessel wall. We describe here the ultrasonography (US) and magnetic resonance (MR) findings, as well as pathologic correlation, of a leiomyosarcoma of the femoral vein in a 42-year-old woman. US revealed a spindle-shaped mass with a connection to the thrombosed femoral vein. We initially misdiagnosed this mass as a peripheral nerve sheath tumor due to the misinterpretation of the thrombosed vein as a nerve bundle

  6. Viscoelastic evaluation of fetal umbilical vein for reconstruction of middle cerebral artery

    OpenAIRE

    Li, Dongyuan; Xu, Donghui; Li, Peng; Wei, Jun; Yang, Kun; Zhao, Conghai

    2013-01-01

    The transplantation of artificial blood vessels with < 6 mm inner diameter as substitutes for human arterioles or veins has not achieved satisfactory results. Umbilical vein has been substituted for ar-tery in vascular transplantation, but it remains unclear whether the stress relaxation and creep tween these vessels are consistent. In this study, we used the fetal umbilical vein and middle cere-bral artery from adult male cadavers to make specimens 15 mm in length, 0.196–0.268 mm in nica med...

  7. Pelvic pain syndrome - successful treatment by ovarian vein embolization : a case report

    International Nuclear Information System (INIS)

    Pelvic pain syndrome or pelvic congestion syndrome, with no apparent organic cause, is a common gynecological disorder. Ovarian varix, one of the causes of this syndrome, presents a difficult diagnostic and therapeutic problem, though surgical ligation of the ovarian vein is an effective method of treatment. although ovarian vein embolization has been recently developed as a useful alternative, no previous reports have described this procedure in Korea. We report a case of pelvic pain syndrome successfully treated by ovarian vein embolization. (author). 10 refs., 3 figs

  8. Pelvic pain syndrome - successful treatment by ovarian vein embolization : a case report

    Energy Technology Data Exchange (ETDEWEB)

    Yun, Ji Young; Hahn, Seong Tai; Lee, Jae Mun; Kim, Choon Yul; Yim, Jung Ik; Jang, Jae Soon; Kim, Sang Woo; Kim Jae Kwang; Sun, Hee Sik; Shinn, Kyung Sub [Saint Mary`s Hospital, Seoul (Korea, Republic of)

    1998-05-01

    Pelvic pain syndrome or pelvic congestion syndrome, with no apparent organic cause, is a common gynecological disorder. Ovarian varix, one of the causes of this syndrome, presents a difficult diagnostic and therapeutic problem, though surgical ligation of the ovarian vein is an effective method of treatment. although ovarian vein embolization has been recently developed as a useful alternative, no previous reports have described this procedure in Korea. We report a case of pelvic pain syndrome successfully treated by ovarian vein embolization. (author). 10 refs., 3 figs.

  9. A New Method to Extract Dorsal Hand Vein Pattern using Quadratic Inference Function

    CERN Document Server

    Khan, Maleika Heenaye Mamode

    2010-01-01

    Among all biometric, dorsal hand vein pattern is attracting the attention of researchers, of late. Extensive research is being carried out on various techniques in the hope of finding an efficient one which can be applied on dorsal hand vein pattern to improve its accuracy and matching time. One of the crucial step in biometric is the extraction of features. In this paper, we propose a method based on quadratic inference function to the dorsal hand vein features to extract its features. The biometric system developed was tested on a database of 100 images. The false acceptance rate (FAR), false rejection rate (FRR) and the matching time are being computed.

  10. Evidence of a dense water vein along the Libyan continental margin

    Directory of Open Access Journals (Sweden)

    G. P. Gasparini

    2008-02-01

    Full Text Available For the first time it was possible to investigate a still poorly known region of the eastern Mediterranean Sea, the Libyan continental margin. An oceanographic cruise, performed during summer 2006, revealed an important and novel feature: a dense vein flowing along the continental slope. The paper describes the vein evolution with some insights on its dynamic and furnishes an estimate of its transport, which results to be comparable with the Adriatic Deep Water production rate. The cascading into a steep canyon which incises the continental shelf suggests that the vein may play an important role in ventilating the deep layers of the Ionian Sea.

  11. Upper extremity deep vein thrombosis in a 25 years old apparently healthy man

    Directory of Open Access Journals (Sweden)

    Fitsum Habte

    2010-01-01

    Full Text Available This case of upper extremity deep vein thrombosis is selected for case report as it is a rare form of deep vein thrombosis without a very well established treatment modality and prognosis. The objective of this study was to report the outcome of a 25 years old male patient with idiopathic upper extremity deep vein thrombosis treated conservatively with low molecular weight heparin (LMWH and oral warfarin. The data sources used were patient interview, laboratory and radiology investigation results and patient charts. The patient had no apparent recurrence or complication for 3 years except the presence of occasional dull pain over the affected left upper extremity

  12. Renal vein thrombosis in nephrotic syndrome--a prospective study and review.

    OpenAIRE

    Chugh, K S; Malik, N.; Uberoi, H. S.; Gupta, V K; Aggarwal, M.L.; Singhal, P. C.; Suri, S.; Jain, S.K.

    1981-01-01

    The incidence of renal vein thrombosis (RVT) and other thrombo-embolic phenomena was evaluated in 44 unselected patients with nephrotic syndrome. Renal vein thrombosis was demonstrated by selective renal venography in 10 patients and at post-mortem in one. Extension of the thrombus from the renal veins into the inferior vena cava was seen in 3 patients. Evidence of thrombo-embolism elsewhere in the body was seen in the form of thrombophlebitis in the lower extremities in 4 patients (9.1%), pu...

  13. Thrombosis of right ovarian vein; Trombosis de la vena ovarica derecha

    Energy Technology Data Exchange (ETDEWEB)

    Forner, J.; Talens, A.; Flores, M.; Mendez, M. [Hospital General Universitario de Valencia. Valencia (Spain)

    2001-07-01

    Ovarian vein thrombosis is a rare postpartum complication (0.1%). It can be fatal, since it can lead to sepsis, pulmonary thromboembolisms and inferior vena cava or renal vein thrombosis. Computed tomography and magnetic resonance imaging are the techniques of choice for its diagnosis, while the value of ultrasound is limited due to its low sensitivity and specificity. We report the case of a woman who, during puerperium, developed thrombosis of right ovarian vein that presented clinical, ultrasonographic and computed tomographic features of appendicitis. We describe the radiological sings and stress the fact that this diagnosis should be suspected in puerperal women. (Author) 9 refs.

  14. Levoatriocardinal Vein: An Unusual Cause of Right-to-Left Shunting

    Directory of Open Access Journals (Sweden)

    Nilima Shet

    2014-01-01

    Full Text Available We present a case demonstrating an anomalous vessel connecting the left brachiocephalic vein and the left superior pulmonary vein, found incidentally on computed tomography (CT imaging. This pulmonary-systemic venous connection, known as a levoatriocardinal vein, is a rare anomaly. In previous descriptions, this vessel has typically been associated with left-to-right shunt. Here, we describe the magnetic resonance imaging (MRI and CT findings in a case with right-to-left shunting through the anomalous vessel likely secondary to elevated right cardiac pressure.

  15. Catheter directed thrombolysis for deep vein thrombosis during the first trimester of pregnancy: two case report

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Kum Rae; Park, Won Kyu; Kim, Jae Woon; Kwun, Woo Hyung; Suh, Bo Yang [College of Medicine, Yeungnam University, Daegu (Korea, Republic of); Park, Kyeong Seok [Yeungnam University, Medical Center, Daegu (Korea, Republic of)

    2008-02-15

    Anticoagulation with heparin has been the standard management therapy of deep vein thrombosis during pregnancy. Pregnancy is generally considered as a contraindication for thrombolysis. However, anticoagulation therapy alone does not protect the limbs from post-thrombotic syndrome and venous valve insufficiency. Catheter-directed thrombolysis, combined with angioplasty and stenting, can remove the thrombus and restore patency of the veins, resulting in prevention of post-thrombotic syndrome and valve insufficiency. We report successful catheter-directed thrombolysis and stenting in two early gestation patients with a deep vein thrombosis of the left lower extremity.

  16. Catheter directed thrombolysis for deep vein thrombosis during the first trimester of pregnancy: two case report

    International Nuclear Information System (INIS)

    Anticoagulation with heparin has been the standard management therapy of deep vein thrombosis during pregnancy. Pregnancy is generally considered as a contraindication for thrombolysis. However, anticoagulation therapy alone does not protect the limbs from post-thrombotic syndrome and venous valve insufficiency. Catheter-directed thrombolysis, combined with angioplasty and stenting, can remove the thrombus and restore patency of the veins, resulting in prevention of post-thrombotic syndrome and valve insufficiency. We report successful catheter-directed thrombolysis and stenting in two early gestation patients with a deep vein thrombosis of the left lower extremity

  17. Massive portal vein tumor thrombus from colorectal cancer without any metastatic nodules in the liver parenchyma: report of a case

    Directory of Open Access Journals (Sweden)

    Yasushi Rino

    2011-10-01

    Full Text Available Metastatic lesions in the liver derived from colorectal cancer rarely invade the portal vein macroscopically. Portal vein tumor thrombus is commonly associated with hepatocellular carcinoma. Colorectal liver metastases are usually accompanied by microscopic tumor invasion into the intrahepatic portal vein, and the incidence of macroscopic tumor thrombus in the trunk of the portal vein is rare. Here, we provide unique appearance of metastatic colorectal cancer. To the best of our knowledge, macroscopically, the right portal vein filled with the tumor thrombus without any tumor in liver parenchyma has been quite rare.

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

    Energy Technology Data Exchange (ETDEWEB)

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

    2014-02-15

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

  19. [Thoracic surgery for patients with deep vein thrombosis].

    Science.gov (United States)

    Sekine, Y; Koh, E

    2012-07-01

    Deep vein thrombosis (DVT) is a main cause of pulmonary thromboembolism (PTE), and therefore both diseases are categorized as a serial pathophysiology of venous thromboembolism (VTE). Treatment goals for DVT include stopping clot propagation and preventing the recurrence of thrombus, the occurrence of PTE, and the development of pulmonary hypertension, which can be a complication of multiple recurrent pulmonary emboli. Clinical guidelines stratify the risk of VTE to 4 levels and recommend the treatment options. In high or extremely high risk patients for VTE, the use of low-dose heparin is recommended. The prevention against VTE, such as elastic compression stockings and intermittent sequential pneumatic leg compression( ISPC), is the most important prophylactic treatment against perioperative PTE by reducing thrombotic risk in low or moderate high risk patients for VET. Since there is no clear evidence that screening all or even selected patients for thrombophilias improves long-term outcomes, the physician's clinical judgment, and consultation with appropriate subspecialists should guide management perioperatively. Once PTE is suspected, immediate and accurate diagnosis and appropriate treatment are mandatory. PMID:22868431

  20. In situ saphenous vein bypass for limb salvage.

    Science.gov (United States)

    Sarcina, A; Carlesi, R; Bellosta, R; Agrifoglio, G

    1993-02-01

    A total of 130 infrapopliteal in situ saphenous vein bypasses were performed in 128 patients between January 1980 and June 1991. The indication for surgery was critical ischaemia with impending limb loss in 121 patients; seven suffered from severe claudication. The distal anastomosis was to the popliteal artery below the knee in 60 cases (46.2%) and in 70 (53.8%) to the tibioperoneal arteries. The results, in terms of secondary patency and limb salvage rates, of the first 68 procedures (1980-1985) and subsequent 62 (1986-June 1991) were compared. In the first period, a secondary patency rate of 42.6% and a limb salvage rate of 67.0% were obtained, compared with 71.3 and 80.8% respectively in the second. These differences are significant for patency (P < 0.005) and limb salvage (P < 0.01). These results show that the in situ technique can give acceptable results but a learning period with a high percentage of early failures is to be expected. PMID:8075993

  1. MANAGEMENT OF PORTAL VEIN THROMBOSIS IN CIRRHOTIC PATIENTS

    Directory of Open Access Journals (Sweden)

    Maria Anna Guardascione

    2009-11-01

    Full Text Available

    Portal vein thrombosis (PVT not associated with hepatocellular carcinoma is considered a frequent complication of liver cirrhosis but, unlike PVT occurring in non-cirrhotic patients, very few data are available on its natural history and management.  The reduced portal blood flow velocity is the main determinant of PVT but, as in other venous thromboses, multiple factors local and systemic, inherited or acquired often can concur with. PVT has a variety of clinical presentations ranging from asymptomatic to life-threatening diseases like gastroesophageal bleeding or acute intestinal ischemia. It is usually diagnosed by Doppler ultrasound but computed tomography and magnetic resonance imaging are useful to study the extent of thrombosis and the involvement of the abdominal organs. The risk of bleeding mainly determined by the presence of gastroesophageal varices and clotting alterations causes concern for the treatment of PVT in cirrhotic patients. To date, anticoagulant therapy seems to be indicated only in patients awaiting liver transplantation. This review focuses on the definition of the subgroups of patients with cirrhosis that might benefit from treatment of PVT and examines the pros and cons of the available treatments in terms of efficacy, monitoring and safety, providing also perspectives for future studies.

  2. Central Vein Dilatation Prior to Concomitant Port Implantation

    International Nuclear Information System (INIS)

    Implantation of subcutaneous port systems is routinely performed in patients requiring repeated long-term infusion therapy. Ultrasound- and fluoroscopy-guided implantation under local anesthesia is broadly established in interventional radiology and has decreased the rate of complications compared to the surgical approach. In addition, interventional radiology offers the unique possibility of simultaneous management of venous occlusion. We present a technique for recanalization of central venous occlusion and angioplasty combined with port placement in a single intervention which we performed in two patients. Surgical port placement was impossible owing to occlusion of the superior vena cava following placement of a cardiac pacemaker and occlusion of multiple central veins due to paraneoplastic coagulopathy, respectively. In both cases the affected vessel segments were dilated with balloon catheters and the port systems were placed thereafter. After successful dilatation, the venous access was secured with a 25-cm-long, 8-Fr introducer sheath, a subcutaneous pocket prepared, and the port catheter tunneled to the venipuncture site. The port catheter was introduced through the sheath with the proximal end connected to a 5-Fr catheter. This catheter was pulled through the tunnel in order to preserve the tunnel and, at the same time, allow safe removal of the long sheath over the wire. The port system functioned well in both cases. The combination of recanalization and port placement in a single intervention is a straightforward alternative for patients with central venous occlusion that can only be offered by interventional radiology.

  3. Treatment of hepatocellular carcinoma accompanied by portal vein tumor thrombus

    Institute of Scientific and Technical Information of China (English)

    Masami Minagawa; Masatoshi Makuuchi

    2006-01-01

    The prognosis of patients with hepatocellular carcinoma (HCC)accompanied by portal vein tumor thrombus (PVTT) is generally poor if left untreated: a median survival time of 2.7-4.0 mo has been reported. Furthermore, while transcatheter arterial chemoembolization (TACE) has been shown to be safe in selected patients, the median survival time with this treatment is still only 3.8-9.5 mo. Systemic single-agent chemotherapy for HCC with PVTT has failed to improve the prognosis, and the response rates have been less than 20%. While regional chemotherapy with low-dose cisplatin and 5-fluorouracil or interferon and 5-fluorouracil via hepatic arterial infusion has increased the response rate, the median survival time has not exceeded 12 (range 4.5-11.8) mo.Combined treatment consisting of radiation for PVTT and TACE for liver tumor has achieved a high response rate, but the median survival rates have still been only 3.8-10.7 mo. With hepatic resection as monotherapy,the 5-year survival rate and median survival time were reportedly 4%-28.5% and 6-14 mo. The most promising results were reported for combined treatments consisting of hepatectomy and TACE, chemotherapy, or internal radiation. The reported 5-year survival rates and median survival times were 42% and 31 mo for TACE followed by hepatectomy; 36.3% and 22.1 mo for hepatectomy followed by hepatic arterial infusion chemotherapy; and 56% for chemotherapy or internal radiation followed by hepatectomy.

  4. The significance of calf deep vein thrombosis in pulmonary embolism

    International Nuclear Information System (INIS)

    Controversy exists about the occurrence of pulmonary embolism (PE) in deep venous thrombosis (DVT) limited to the calf below the popliteal vein. The authors prospectively evaluated 54 such patients; 52 of 54 had undergone recent major orthopedic surgery. Ventilation perfusion (V/Q) scans were performed prior to the orthopedic surgery in 43 of 52 patients. All preoperative V/Q scans were either normal or had low probability for PE. Venography was performed on the 7th postoperative day, and all patients had isolated calf DVT. Post-phlebography V/Q scans were performed within 18 hours after venography. Thirty-five of 43 (82%) of the V/Q scans were unchanged postoperatively, while eight of 43 (18%) showed new segmental and subsegmental perfusion abnormalities without associated ventilatory changes, suggesting that pulmonary emboli had occurred. Only two of eight patients had symptoms suggestive of PE. Based on these results, the authors believe that pulmonary emboli do occur with isolated calf DVT. Baseline V/Q scans are helpful for detecting PE in population groups at high risk for developing DVT

  5. Estimation of papaya leaf area using the central vein length

    Directory of Open Access Journals (Sweden)

    Campostrini Eliemar

    2001-01-01

    Full Text Available Four genotypes of papaya (Carica papaya L. two from the 'Solo' group (Sunrise Solo and Improved Sunrise Solo line 72/12 and two from the 'Formosa' group (Tainung 02 and Known-You 01, grown in Macaé, RJ, Brazil (lat. 22(0 24' S, long. 41(0 42' W, were used in this study. Twenty-five mature leaves from each genotype were sampled four and five months after seedling transplant to the field to determine the length of the leaf central vein (LLCV and the leaf area (LA. According to covariance analyses there were no significant differences in the slope and intercept of the mathematical models calculated for each genotype. Thus, a single mathematical model (Log LA = 0.315 + 1.85 Log LLCV, R²=0.898 was adjusted to estimate the LA using the length of LLCV for the four genotypes. An unique model can be applied to estimate the LA for the four papaya genotypes using LLCV in the range from 0.25 to 0.60 m, and for papaya trees 150 to 180 days after transplanting.

  6. Applications and complications of subclavian vein catheterization for hemodialysis

    International Nuclear Information System (INIS)

    Objective: To study the indications, complications and duration of 605 subclavian catheters inserted over a period of 4 years as venous access for the management of renal failure in local setup. Results: Among the patients who underwent subclavian vien catheterization, 75.2% patients were suffering from chronic renal failure and 24.7% patients were admitted for acute renal failure. Among chronic renal failure patients, 21.9% catheters had to be replaced due to various complications e.g. thrombosis, infection or kinking of the catheter. The subclavian catheters remained in place for a mean duration of 4 weeks. Early complications encountered were arterial puncture, inability to cannulate the innominate vein, hemo thorax, punctures of thoracic duct, hemo mediastinum, arrhythmias and pulmonary hematoma in 10.7%, 16.5%, 0.5%, 0.2%, 0.6% and 0.2% of patients respectively. Mortality attributed to the procedure occurred in 0.1 % cases. Delayed complications included early infection in 15% catheterizations while delayed infection occurred in 39 % cases. Conclusion: Percutaneous subclavian catheterization is valuable, relatively easy to learn and safe method with acceptable rate of complications for patients necessitating hemodialysis and no established permanent vascular access. (author)

  7. Combined therapy pathospermia patients after endovascular sclerotherapy of testicular veins

    Directory of Open Access Journals (Sweden)

    O. B. Zhukov

    2014-11-01

    Full Text Available We examined 44 patients with varicocele and pathospermia as asthenia and 30 patients experienced oligozoospermia and 14 patients in the control group. Of these, the marriage of the 21 patients (16 – experimental, 5 – control. Total of 43 patients were operated on both groups. The patients of the experimental group comprised 29 people, one patient withdrew from the trial group because of changing of place of living. There were 14 patients in the control group. Among the patients of both groups with subclinical varicocele operated 6 patients, with stage I – 10 patients, with stage II – 18, with stage III – 9. Age of the patients operated on experimental and control groups were comparable and reached 34.1 ± 7.2 years, and 31.2 ± 4.6 years, respectively. All patients underwent endovascular sclerotherapy of testicular veins, of which the 3rd patients underwent both sides. AndroDoz complex in less time helps restore semen parameters, improving the morphology, increasing the concentration and progressive motility. AndroDoz can be used in support of post-operative medical therapy in patients after varicocelectomy, especially in patients older than 35 years with bilateral varicocele.

  8. Combined therapy pathospermia patients after endovascular sclerotherapy of testicular veins

    Directory of Open Access Journals (Sweden)

    O. B. Zhukov

    2012-01-01

    Full Text Available We examined 44 patients with varicocele and pathospermia as asthenia and 30 patients experienced oligozoospermia and 14 patients in the control group. Of these, the marriage of the 21 patients (16 – experimental, 5 – control. Total of 43 patients were operated on both groups. The patients of the experimental group comprised 29 people, one patient withdrew from the trial group because of changing of place of living. There were 14 patients in the control group. Among the patients of both groups with subclinical varicocele operated 6 patients, with stage I – 10 patients, with stage II – 18, with stage III – 9. Age of the patients operated on experimental and control groups were comparable and reached 34.1 ± 7.2 years, and 31.2 ± 4.6 years, respectively. All patients underwent endovascular sclerotherapy of testicular veins, of which the 3rd patients underwent both sides. AndroDoz complex in less time helps restore semen parameters, improving the morphology, increasing the concentration and progressive motility. AndroDoz can be used in support of post-operative medical therapy in patients after varicocelectomy, especially in patients older than 35 years with bilateral varicocele.

  9. Hemoperitoneum due to ruptured paraumbilical vein in a cirrhotic patient with portal hypertension : treatment by means of coil embolization

    International Nuclear Information System (INIS)

    The paraumbilical vein is one of the anastomotic channels between the portal and systemic circulatory systems, and rupture of the intra-abdominal varix is an unusual complication of portal hypertension that can lead to life-threatening hemoperitoneum. We experienced a case of hemoperitoneum due to a ruptured paraumbilical vein revealed by ultrasonography (US), computed tomography (CT) and percutaneous transhepatic portography. The last mentioned demonstrated a dilated paraumbilical vein draining two branches of the left portal vein into the right external iliac vein, and we performed coil embolization at the site at which the presumed site of paraumbilical vein was presumed to cause hemoperitoneum. We describe this this unusual case of hemoperitoneum due to a ruptured paraumbilical vein in a known liver cirrhosis patient in whom portal hypertension was treated by means of coil embolization. (author)

  10. A STUDY OF CORRELATION OF ESOPHAGEAL VARICES IN CIRRHOTIC PATIENTS WITH PORTAL HAEMODYNAMICS WITH SPECIAL REFERENCE TO PORTAL VEIN DIAMETER, PORTAL VEIN VELOCITY, CONGESTION INDEX, LIVER VASCULAR INDEX

    Directory of Open Access Journals (Sweden)

    Arvind

    2014-12-01

    Full Text Available OBJECTIVE : Approximately two thirds of patients with decompensated cirrhosis and one third of those with compensated cirrhosis have varices at the time of diagnosis. Therefore , it is essential to identify and treat those patients at highest risk because each episode of variceal hemorrhage carries a 20% to 30% risk of death , and 70% of patients not receiving treatment will die within 1 year of the initial bleeding episode . (1 METH OD S: For this study , patients with cirrhosis with or without the evidence of any upper Gastrointestinal bleed , admitted in the department of medicine , JA Group of Hospitals , GR Medical College were taken. The study was conducted between September 2011 and November 2012 and cases were evaluated on the basis of clinical , haematological , ultrasonographic and endoscopic findings. Total number of cases were 100. RESULT : The prevalence of esophageal varices was 75% in cirrhotic patients out of which 28% had bleeding. The prevalence of gastric varices was 1.33%. The portal vein diameter correlated with the presence of varices while portal vein velocity , congestion index and liver vascular index had no significant correlation with esophageal varices. The Portal vein diameter more than 1.4 cm can predict varices with sensitivity 76 % (p<0.05 and Portal vein diameter more than 1.5 cm can detect bleeding varices in cirrhotic patients with sensitivity 55.56% and specificity 80.70% . CONCLUSION : This study showed tha t duration of illness , spleen size and tense ascitis on ultrasonography and portal vein diameter correlated with the presence of esophageal varices. The duration of illness and portal vein diameter are also correlated with bleeding manifestation

  11. Scimitar syndrome: Surgical approach to an unusual anatomy of the scimitar vein

    Directory of Open Access Journals (Sweden)

    Roy Varghese

    2016-01-01

    Full Text Available Repair strategies in scimitar syndrome are varied and need to be individualized to the surgical anatomy. This report focuses on the repair achieved in a case with unusual anatomy of the scimitar vein.

  12. Deep Vein Thrombosis: Symptoms, Diagnosis, Treatment and Latest NIH Research | NIH MedlinePlus the Magazine

    Science.gov (United States)

    ... are commonly used to diagnose pulmonary embolisms (PE). Treatment Deep vein thrombosis (DVT) is treated with medicines and certain devices and therapies. The main goals of treating DVT include: Stopping ...

  13. Treatment of portal vein tumor thrombosis in patients with hepatocellular carcinoma by TACE

    International Nuclear Information System (INIS)

    Objective: To evaluate the therapeutic effect of transcatheter arterial chemoembolization (TACE) for hepatocellular carcinoma with tumor thrombosis of portal vein. Methods: One hundred and six patients of hepatocellular carcinoma with tumor thrombosis of portal vein under treatment of TACE were observed before and after the procedure. Results: After TACE tumor size reduced >50% in 23 patients, <50% in 25, no significant change in 44. The size of tumor enlarged in 12. The disappearance of portal vein tumor thrombosis accessed in 14, with reduction in 39, and no significant change in 51. Two patients died within thrombosis accessed in 14, with reduction in 39, and no significant change in 51. Two patients died within on week. Conclusion: TACE provides good therapeutic effect on hepatocellular carcinoma with tumor thrombosis of portal vein. (authors)

  14. Recurrent deep vein thrombosis presenting in a patient with overt hyperthyroidism

    Directory of Open Access Journals (Sweden)

    Pramila Dharmshaktu

    2014-02-01

    Full Text Available We present a 35-year-old male patient who was diagnosed with hyperthyroidism and admitted to our hospital with complaints of pain and swelling over his left lower limb. Physical examination was suggestive of deep vein thrombosis of left lower limb. On further investigations and work up, he was found to have deep vein thrombosis of left lower limb involving left common femoral, popliteal and external iliac vein. Inherited causes of hypercoagulable states were ruled out after investigations. Serum homocystein levels were normal and serum antinuclear antibodies was negative. Factor VIII levels were raised. Two months later patient again presented with deep vein thrombosis of right lower limb. Factor VIII levels were out of range this time. Hyperthyroidism has been associated with hypercoagulability by various mechanisms but whether it is a true hypercoagulable state is not yet proven and reported in only few case reports.

  15. [Well-Tried and New Ones – Update Varicose Vein Treatment 2016].

    Science.gov (United States)

    Uthoff, Heiko; Spinedi, Luca; Lattmann, Thomas; Broz, Pavel; Staub, Daniel

    2016-07-01

    Venous leg symptoms are frequent, but their relevance is frequently underestimated. With the introduction of effective, minimal-invasive endovenous treatment modalities the treatment of varicose veins has recently made major advances. The basis of every treatment decision is a competent anamnesis, clinical investigation and duplex scan. Outpatient varicose vein treatment using endovenous methods has been proofed to be at least as effective as traditional varicose vein surgery but is associated with fewer adverse events. Accordingly, the endovenous methods are exspected to replace surgery as goldstandard treatment and endovenous thermal vein ablation (Laser/Radiofrequency) is accepted by the Swiss Federal Office of Public Health for general reimbursment since 1st january 2016. All currently available methods have their advantages and limitations, the individual selection based on the present symptoms, anatomic findings and patients’ preferences is fundamental for an optimal treatment result and maximized patient satisfaction. PMID:27381305

  16. A case of dural arteriovenous fistula draining to the diploic vein presenting with intracerebral hemorrhage.

    Science.gov (United States)

    Yako, Rie; Masuo, Osamu; Kubo, Kenji; Nishimura, Yasuhiko; Nakao, Naoyuki

    2016-03-01

    The authors report an unusual case of a dural arteriovenous fistula (dAVF) draining only to the diploic vein and causing intracerebral hemorrhage. A 62-year-old woman presented with disturbance of consciousness and left hemiparesis. Brain CT scanning on admission showed a right frontal subcortical hemorrhage. Digital subtraction angiography revealed an arteriovenous shunt located in the region around the pterion, which connected the frontal branch of the right middle meningeal artery with the anterior temporal diploic vein and drained into cortical veins in a retrograde manner through the falcine vein. The dAVF was successfully obliterated by percutaneous transarterial embolization with N-butyl-2-cyanoacrylate. The mechanism of retrograde cortical venous reflux causing intracerebral hemorrhage is discussed. PMID:26295918

  17. Weber-Christian disease producing splenic vein occlusion and bleeding gastric varices: successful treatment with sclerotherapy.

    OpenAIRE

    Heseltine, D.; Bramble, M.; Cole, A.; Clarke, D; Castle, W

    1990-01-01

    A 48 year old woman with intra-abdominal Weber-Christian disease presented with bleeding gastric varices and evidence of splenic vein occlusion. We describe the problems encountered in making this diagnosis and subsequent treatment.

  18. Congenital absence of the portal vein in a child with Turner syndrome

    Energy Technology Data Exchange (ETDEWEB)

    Noe, Jacob A.; Burton, Edward M. [Department of Radiology, University of Tennessee College of Medicine-Chattanooga Branch, Chattanooga, TN (United States); Pittman, Heather C. [Department of Pediatrics, University of Tennessee College of Medicine-Chattanooga Branch, Chattanooga, TN (United States)

    2006-06-15

    Congenital absence of the portal vein (CAPV) is a rare malformation associated with hepatic encephalopathy and liver function abnormalities. We report a case of a 2-year-old with Turner syndrome, CAPV, and congenital heart malformations. (orig.)

  19. Deep vein thrombosis: A rare complication in oral and maxillofacial surgery: A review of two cases

    Directory of Open Access Journals (Sweden)

    M.R. Ramesh Babu

    2013-01-01

    Full Text Available Deep vein thrombosis (DVT is caused by obstruction of blood flow of deep veins in upper and lower limb. One of the precipitating factors for DVT is surgery under general anesthesia exceeding 30 min. However, there are very few reports of DVT associated with surgery of oral and maxillofacial region. In this paper we report two cases of DVT involving left ilio-femoropopliteal deep vein in one patient treated for fractured left angle of mandible and left peroneal vein in the other patient treated for oral sub mucous fibrosis. Clinical and color Doppler examination were performed to diagnose the condition and were referred to vascular surgical unit of higher institute for further management. These cases illustrates any surgery of maxillofacial region is not free from risk of DVT, which can cause fatal pulmonary thromboembolism.

  20. Prejunctional inhibition of norepinephrine release caused by acetylcholine in the human saphenous vein

    International Nuclear Information System (INIS)

    We performed experiments to determine whether or not acetylcholine exerts a prejunctional inhibitory effect on adrenergic neurotransmission in the human blood vessel wall. Rings of human greater saphenous veins were prepared 2 to 15 hours after death and mounted for isometric tension recording in organ chambers filled with Krebs-Ringer solution. Acetylcholine depressed contractile responses to electric activation of the sympathetic nerve endings significantly more than those to exogenous norepinephrine; the relaxations caused by the cholinergic transmitter were antagonized by atropine. Helical strips were incubated with [/sub 3/H]norepinephrine and mounted for superfusion. Electric stimulation augmented the fractional release of labeled norepinephrine. Acetylcholine caused a depression of the evoked /sub 3/H release which was antagonized by atropine but not by hexamethonium. These experiments demonstrate that, as in animal cutaneous veins, there are prejunctional inhibitory muscarinic receptors on the adrenergic nerve endings in the human saphenous vein. By contrast, the human vein also contains postjunctional inhibitory muscarinic receptors