Riolan's anastomosis

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The Riolan anastomosis - after the French anatomist Jean Riolan - is an inconsistent vascular connection ( anastomosis ) between the middle large intestinal artery ( arteria colica media ) from the arteria mesenterica superior and the left large intestinal artery ( arteria colica sinistra ), which arises from the arteria mesenterica inferior . However, other connections between the superior mesenteric artery and the inferior mesenteric artery are also referred to as "Riolan's anastomosis". Not to be confused with the Drummond anastomoses ("Drummond marginal artery"), which form a constant vascular arcade close to the intestine.

This connection is important when one of the two large intestinal arteries is blocked, because then blood flow can take place via the other artery.

literature

  • Karl Renner, Christoph Ausch, Harald R. Rosen, E. Perik, Gerhard Hochwarter, Rudolf Schiessel, Wilhelm Firbas: The collateral vascular supply of the left hemicolon. Historical observations and current clinical significance. In: The surgeon. Vol. 74, No. 6, 2003, pp. 575-578, doi : 10.1007 / s00104-003-0634-6 .
  • Friedrich Anderhuber, Franz Pera, Johannes Streicher: Waldeyer - Anatomie des Menschen, 19th edition, p. 578