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The catheter is then carefully navigated through the arterial system with x-ray guidance until it reaches the branches of the superior rectal artery that supply blood to the hemorrhoidal plexus. [3] Once in position, microparticles and/or microcoils are injected through the catheter to block these arteries, thereby reducing the blood supply to ...
It descends into the pelvis between the layers of the mesentery of the sigmoid colon, crossing the left common iliac artery and vein. It divides, opposite the third sacral vertebra into two branches, which descend one on either side of the rectum. About 10 or 12 cm from the anus, these branches break up into several small branches. [1]
The inferior rectal artery arises from the internal pudendal artery as it passes above the ischial tuberosity.. Piercing the wall of the pudendal canal, it divides into two or three branches which cross the ischioanal fossa, and are distributed to the muscles and integument of the anal region, and send offshoots around the lower edge of the gluteus maximus to the skin of the buttock.
Anorectal varices are collateral submucosal blood vessels dilated by backflow in the veins of the rectum. [1] Typically this occurs due to portal hypertension which shunts venous blood from the portal system through the portosystemic anastomosis present at this site into the systemic venous system.
Ischemic colitis (also spelled ischaemic colitis) is a medical condition in which inflammation and injury of the large intestine result from inadequate blood supply . Although uncommon in the general population, ischemic colitis occurs with greater frequency in the elderly, and is the most common form of bowel ischemia .
The ileocolic artery is the lowest branch arising from the concavity of the superior mesenteric artery.It supplies the cecum, ileum, and appendix. It passes downward and to the right behind the peritoneum toward the right iliac fossa, where it divides into a superior and an inferior branch: the inferior gives rise to the appendicular artery and anastomoses with the end of the superior ...
Along with the protection provided by collateral blood flow, the colon possesses various other mechanisms to prevent ischemia, such as opening of all mesenteric capillaries, redistribution of intramural blood supply, and improved oxygen extraction. But if those are exceeded, these defensive mechanisms become overwhelmed and no longer provide ...
The right colic artery is an artery of the abdomen, a branch of the superior mesenteric artery supplying the ascending colon. It divides into two terminal branches - an ascending branch and a descending branch - which form anastomoses with the middle colic artery , and ileocolic artery (respectively).