The Experts below are selected from a list of 78 Experts worldwide ranked by ideXlab platform
W. M. C. Mallens - One of the best experts on this subject based on the ideXlab platform.
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Obstruction of the superior vena cava due to aortic dissection: CT findings of collateral venous flow via the Bronchial Veins
European Radiology, 1996Co-Authors: R. Schepers-bok, W. M. C. MallensAbstract:Obstruction of the superior vena cava caused by acute aortic dissection can lead to collateral flow in the azygos and hemiazygos system, as well as to reversal of flow in the pleurohilar and Bronchial Veins. In the latter case, a small right-to-left shunt has formed. We describe the findings in such a case on a contrast enhanced spiral CT.
R. Schepers-bok - One of the best experts on this subject based on the ideXlab platform.
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Obstruction of the superior vena cava due to aortic dissection: CT findings of collateral venous flow via the Bronchial Veins
European Radiology, 1996Co-Authors: R. Schepers-bok, W. M. C. MallensAbstract:Obstruction of the superior vena cava caused by acute aortic dissection can lead to collateral flow in the azygos and hemiazygos system, as well as to reversal of flow in the pleurohilar and Bronchial Veins. In the latter case, a small right-to-left shunt has formed. We describe the findings in such a case on a contrast enhanced spiral CT.
Paula Carvalho - One of the best experts on this subject based on the ideXlab platform.
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Functional anatomy of Bronchial Veins.
Pulmonary pharmacology & therapeutics, 2006Co-Authors: Nirmal B. Charan, William H. Thompson, Paula CarvalhoAbstract:The amount of Bronchial arterial blood that drains into the systemic venous system is not known. Therefore, in this study we further delineated the functional anatomy of the Bronchial venous system in six adult, anesthetized, and mechanically ventilated sheep. Through a left thoracotomy, the left azygos vein was dissected and the insertion of the Bronchial vein into the azygos vein was identified. A pouch was created by ligating the azygos vein on either side of the insertion of the Bronchial vein. A catheter was inserted into this pouch for the measurement of Bronchial venous occlusion pressure and Bronchial venous blood flow. An ultrasonic flow probe was placed around the common Bronchial branch of the bronchoesophageal artery to monitor the Bronchial arterial blood flow. Catheters were also placed into the carotid artery and the pulmonary artery. The mean Bronchial blood flow was 20.6+/-4.2mlmin(-1) (mean+/-SEM) and, of this, only about 13% of the blood flow drained into the azygos vein. The mean systemic artery pressure was 72.4+/-4.1mmHg whereas the mean Bronchial venous occlusion pressure was 38.1+/-2.1mmHg. The mean values for blood gas analysis were as follows: Bronchial venous blood pH=7.54+/-0.02, PCO(2)=35+/-2.6, PO(2)=95+/-5.7mmHg; systemic venous blood-pH=7.43+/-0.02, PCO(2)=48+/-3.2, PO(2)=42+/-2.0mmHg; systemic arterial blood-pH=7.51+/-0.03, PCO(2)=39+/-2.1, PO(2)=169+/-9.8mmHg. We conclude that the major portion of the Bronchial arterial blood flow normally drains into the pulmonary circulation and only about 13% drains into the Bronchial venous system. In addition, the oxygen content of the Bronchial venous blood is similar to that in the systemic arterial blood.
Munaza Akunjee - One of the best experts on this subject based on the ideXlab platform.
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Superior Vena Cava Thrombosis Due to a Temporary Hemodialysis Catheter Presenting After 5 Years With Hematemesis, Hemoptysis and Pleural Effusion
Journal of Medical Cases, 2014Co-Authors: Nidal Arnous, Munaza AkunjeeAbstract:Superior vena cava (SVC) thrombosis is increasingly seen now due to the liberal use of intravascular catheters. Most of these cases present with symptoms acutely, like any case of deep vein thrombosis, usually with ipsilateral arm and face swelling. Our patient presented after 5 years with unusual symptoms that are unrelated to the thrombosis itself, but due to the collateral circulation. He was a 38-year-old male patient with end-stage renal disease on hemodialysis (HD) for 9 years, initially via a left arm arteriovenous (AV) fistula, then via a temporary right subclavian dialysis catheter for a period of 5 months before being maintained on his current AV fistula in the right arm for the last 5 years. He presented with intermittent episodes of hematemesis and hemoptysis, and was also found to have pleural effusion. He was found to have chronic thrombosis in the SVC. Chronic SVC obstruction causes formation and increase in the flow in the collateral circulation in the esophageal plexus causing varices, in the intercostals Veins causing pleural fluid formation, and in the Bronchial Veins leading to hemoptysis. The AV fistula aggravated these findings by further increasing the flow and the pressure in the collateral circulation. In conclusion, chronic SVC thrombosis can occur as a consequence of HD catheters, and may present with symptoms related to the collateral circulation. J Med Cases. 2014;5(10):515-518 doi: http://dx.doi.org/10.14740/jmc1925w
Nirmal B. Charan - One of the best experts on this subject based on the ideXlab platform.
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Functional anatomy of Bronchial Veins.
Pulmonary pharmacology & therapeutics, 2006Co-Authors: Nirmal B. Charan, William H. Thompson, Paula CarvalhoAbstract:The amount of Bronchial arterial blood that drains into the systemic venous system is not known. Therefore, in this study we further delineated the functional anatomy of the Bronchial venous system in six adult, anesthetized, and mechanically ventilated sheep. Through a left thoracotomy, the left azygos vein was dissected and the insertion of the Bronchial vein into the azygos vein was identified. A pouch was created by ligating the azygos vein on either side of the insertion of the Bronchial vein. A catheter was inserted into this pouch for the measurement of Bronchial venous occlusion pressure and Bronchial venous blood flow. An ultrasonic flow probe was placed around the common Bronchial branch of the bronchoesophageal artery to monitor the Bronchial arterial blood flow. Catheters were also placed into the carotid artery and the pulmonary artery. The mean Bronchial blood flow was 20.6+/-4.2mlmin(-1) (mean+/-SEM) and, of this, only about 13% of the blood flow drained into the azygos vein. The mean systemic artery pressure was 72.4+/-4.1mmHg whereas the mean Bronchial venous occlusion pressure was 38.1+/-2.1mmHg. The mean values for blood gas analysis were as follows: Bronchial venous blood pH=7.54+/-0.02, PCO(2)=35+/-2.6, PO(2)=95+/-5.7mmHg; systemic venous blood-pH=7.43+/-0.02, PCO(2)=48+/-3.2, PO(2)=42+/-2.0mmHg; systemic arterial blood-pH=7.51+/-0.03, PCO(2)=39+/-2.1, PO(2)=169+/-9.8mmHg. We conclude that the major portion of the Bronchial arterial blood flow normally drains into the pulmonary circulation and only about 13% drains into the Bronchial venous system. In addition, the oxygen content of the Bronchial venous blood is similar to that in the systemic arterial blood.
