Vein which drains blood from the small intestine
Blood vessel
In human anatomy , the superior mesenteric vein (SMV ) is a blood vessel that drains blood from the small intestine (jejunum and ileum ). Behind the neck of the pancreas , the superior mesenteric vein combines with the splenic vein to form the portal vein that carries blood to the liver . The superior mesenteric vein lies to the right of the similarly named artery , the superior mesenteric artery , which originates from the abdominal aorta .
Structure
Tributaries of the superior mesenteric vein drain the small intestine , large intestine , stomach , pancreas and appendix and include:
The superior mesenteric vein combines with the splenic vein to form the portal vein .[ 1] [ 2]
Clinical significance
Thrombosis of the superior mesenteric vein is quite rare, but a significant cause of mesenteric ischemia and can be fatal. It is estimated that 10–15% of mesenteric ischemia is due to mesenteric thrombosis .[ 3]
References
^ "Diagnostic angiography in hepatobiliary and pancreatic disease: Indications" . Blumgart's Surgery of the Liver, Biliary Tract and Pancreas, 2-Volume Set : 392–402.e1. 2017-01-01. doi :10.1016/B978-0-323-34062-5.00021-2 . ISBN 9780323340625 ^ Comar, Kevin M.; Sanyal, Arun J. (2004-01-01), "Portal Hypertension and Esophageal Varices" , in Johnson, Leonard R. (ed.), Encyclopedia of Gastroenterology , New York: Elsevier, pp. 212– 219, ISBN 978-0-12-386860-2 , retrieved 2021-01-24 ^ Tessier, DJ; Williams, RA (2020-12-05). "Acute Mesenteric Ischemia: Background, Anatomy, Pathophysiology" – via eMedicine.
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