Marginal artery of Drummond
The marginal artery of Drummond, also known as the marginal arcade, is an anastomotic arterial channel that supplies the entirety of the large intestine. It extends from the ileocecal junction to the rectosigmoid junction. As it runs in close proximity along the inner border of the large intestine, it is sometimes referred to as juxtacolic artery.
The marginal artery of Drummond is formed by the anastomosing terminal branches of the superior mesenteric artery (ileocolic, right colic, middle colic arteries) and inferior mesenteric artery (left colic and sigmoid arteries). The most direct communication between the superior and inferior mesenteric arteries is established in the arcade of Riolan, which is a portion of the marginal artery of Drummond formed between the right side of the transverse colon and the upper descending colon.
|Origin||Ileocolic, right colic, middle colic, left colic and sigmoid arteries|
This article will discuss the anatomy and function of the marginal artery of Drummond.
The marginal artery of Drummond is formed by the anastomotic branches of the ileocolic, right colic, and middle colic artery, that arise from the superior mesenteric artery; and branches of the left colic and sigmoid arteries, which arise from the inferior mesenteric artery. It runs within the mesentery at about 3-4 cm from the inner border of the large intestine, extending from the ileocecal junction to the rectosigmoid junction.
The arcade of the Riolan refers to the portion of the marginal artery of Drummond that is formed between the branches of the middle and left colic artery. It signifies the site of direct communication between the superior and inferior mesenteric arteries, found in the mesentery between the right side of the transverse colon and the proximal part of the descending colon. This connection is clinically significant to provide collateral blood flow in the event of a stenosis or occlusion.
Branches and supply
The marginal artery of Drummond gives off numerous small branches called straight arteries, or vasa recta, that supply blood to the large intestine.