| Sucquet-Hoyer anastomoses | Arteriovenous anastomoses controlling blood flow in the glomus bodies in the digits. Synonym: Hoyer's anastomoses, Hoyer's canals, Sucquet's anastomoses, Sucquet's canals, Sucquet-Hoyer anastomoses. (05 Mar 2000) |
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| carotid-vertebral artery anastomoses | <radiology> Trigeminal a. (most common variant: 0.1-0.2%), otic a., hypoglossal a., proatlantal intersegmental a., ** posterior communicating a. (PCA), -- normal anastomosis of carotid to BASILAR artery) (12 Dec 1998) |
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| portacaval anastomoses | Naturally-occurring venous communications between tributaries of the portal venous system and tributaries of the systemic venous system. The major portal-systemic anastomoses include: 1) oesophageal branches of left gastric vein with oesophageal veins, 2) superior rectal vein with middle and inferior rectal veins, 3) paraumbilical veins with subcutaneous veins of anterior abdominal wall, 4) retroperitoneal veins with venous branches of veins of the colon and bare area of the liver, and 5) a patent ductus venosus connecting left branch of portal vein to inferior vena cava (rare). These anastomoses are important clinically, providing collateral circulation during portal obstruction or hypertension, at which time they may become varicose. See: caput medusae, oesophageal varices, haemorrhoids. Surgically-created communications between the portal vein and the inferior vena cava or their tributaries, to relieve portal hypertension. Synonym: portacaval anastomoses. (05 Mar 2000) |
| portal-systemic anastomoses | Naturally-occurring venous communications between tributaries of the portal venous system and tributaries of the systemic venous system. The major portal-systemic anastomoses include: 1) oesophageal branches of left gastric vein with oesophageal veins, 2) superior rectal vein with middle and inferior rectal veins, 3) paraumbilical veins with subcutaneous veins of anterior abdominal wall, 4) retroperitoneal veins with venous branches of veins of the colon and bare area of the liver, and 5) a patent ductus venosus connecting left branch of portal vein to inferior vena cava (rare). These anastomoses are important clinically, providing collateral circulation during portal obstruction or hypertension, at which time they may become varicose. See: caput medusae, oesophageal varices, haemorrhoids. Surgically-created communications between the portal vein and the inferior vena cava or their tributaries, to relieve portal hypertension. Synonym: portacaval anastomoses. (05 Mar 2000) |
| Schmidel's anastomoses | Abnormal channels of communication between the caval and portal venous systems. (05 Mar 2000) |
| Hoyer's anastomoses | Arteriovenous anastomoses controlling blood flow in the glomus bodies in the digits. Synonym: Hoyer's anastomoses, Hoyer's canals, Sucquet's anastomoses, Sucquet's canals, Sucquet-Hoyer anastomoses. (05 Mar 2000) |
| Sucquet's anastomoses | Arteriovenous anastomoses controlling blood flow in the glomus bodies in the digits. Synonym: Hoyer's anastomoses, Hoyer's canals, Sucquet's anastomoses, Sucquet's canals, Sucquet-Hoyer anastomoses. (05 Mar 2000) |