What does the inferior mesenteric artery supply?

What does the inferior mesenteric artery supply?

The branches of the inferior mesenteric artery include 1) the left colic, which is located retroperitoneally and supplies the descending colon; 2) the sigmoid branches, which supply the sigmoid colon; and 3) the superior rectal artery, which is the terminal branch of the inferior mesenteric artery at the pelvic brim.

What is the function of the inferior mesenteric vein?

The inferior mesenteric vein (IMV) drains the descending colon, the sigmoid colon, and the rectum through the left colic vein, the sigmoid branches, and the superior rectal vein, respectively. The IMV joins the splenic vein, which then joins the SMV to form the portal vein.

What major organ does the superior and inferior mesenteric artery supply?

Blood supply and lymphatic drainage of the large intestine The large intestine is supplied by the superior and inferior mesenteric arteries (Figs 4.33–4.36). The branches of the superior mesenteric artery are the ileocolic, right colic and the middle colic arteries (Figs 4.33–4.34).

How do you identify an inferior mesenteric artery?

The inferior mesenteric artery is the last of the three major anterior branches of the abdominal aorta (the other two are the coeliac trunk and superior mesenteric artery). It arises at L3, near the inferior border of the duodenum, 3-4 cm above where the aorta bifurcates into the common iliac arteries.

Where the inferior mesenteric artery is located in the body?

The inferior mesenteric artery (IMA) is another major blood supply to the lower GI tract (Fig. 25.4). It is located at the level of L2-L4 (most often at the L3-L4 disk space level, 2–3 cm above the aortic bifurcation). The IMA supplies the distal transverse colon, descending colon, sigmoid colon, and rectum.

What is the meaning of mesenteric artery?

Mesenteric artery: One of the arteries which arises from the abdominal portion of the aorta and distributes blood to most of the intestines.

What are the 3 mesenteric arteries?

It supplies the distal transverse, left, and sigmoid portions of the colon and the rectum. Its branches are the left colic artery, the sigmoid (inferior left colic) arteries, and the superior rectal artery. The SMA and IMA collateralize via the marginal artery of Drummond and the meandering mesenteric artery.

Is there a inferior mesenteric vein?

The inferior mesenteric vein arises in the lower abdomen as a continuation of the superior rectal vein that drains the rectal (hemorrhoidal) venous plexus. The inferior mesenteric vein runs retroperitoneally, ascending from its origin to the left side.

Where does the inferior mesenteric vein come from?

The inferior mesenteric vein arises from the splenic vein posterior to the midbody of the pancreas, before the junction of the superior mesenteric and splenic vein.

What is the origin of inferior mesenteric artery?

The inferior mesenteric artery arises from the left anterolateral aspect of the aorta, often just above and to the left of the umbilicus. In relation to the superior mesenteric artery, it is smaller and is situated lower, deeper, and to the left. It originates at the level of the third or fourth lumbar vertebra.

Where does the mesenteric artery come from?

The superior mesenteric artery (SMA) is a major artery of the abdomen. It arises from the abdominal aorta, and supplies arterial blood to the organs of the midgut – which spans from the major duodenal papilla (of the duodenum) to the proximal 2/3 of the transverse colon.

Where does the inferior mesenteric vein go?

The inferior mesenteric vein drains blood from the rectum, sigmoid colon, descending colon and splenic flexure. It begins as the superior rectal vein and ascends, receiving tributaries from the sigmoid veins and the left colic veins.

What is mesenteric vein thrombosis?

Mesenteric venous thrombosis (MVT) is a blood clot in one or more of the major veins that drain blood from the intestine. The superior mesenteric vein is most commonly involved.

How long can you live with mesenteric ischemia?

The 2- and 5-year survival rates were 70% and 50% and mainly related to cardiovascular comorbidity and malignant disease. Only one patient died after a recurrent attack of arterial mesenteric thrombosis.

What happens if inferior mesenteric artery is blocked?

In mesenteric ischemia, a blockage in an artery cuts off blood flow to a portion of the intestine. Mesenteric ischemia (mez-un-TER-ik is-KEE-me-uh) occurs when narrowed or blocked arteries restrict blood flow to your small intestine. Decreased blood flow can permanently damage the small intestine.

Is superior mesenteric artery life threatening?

Superior Mesenteric Artery syndrome is a rare but potentially life threatening condition in which the duodenum becomes compressed between the SMA and the aorta. Early symptoms can include simply nausea and early satiety.

What is the function of the inferior mesenteric artery?

The IMA serves the part of the rectum near the descending and sigmoid colons. As it runs its course, the IMA branches into the left colic and the superior rectal arteries, as well as the sigmoid branches. The IMA also has a similarly named venal counterpart, the inferior mesenteric vein.

What is the cause of superior mesenteric artery syndrome?

The most common cause of superior mesenteric artery syndrome is severe weight loss including trauma, burns, anorexia nervosa and/or after prolonged bed rest 22). Other rare causes of superior mesenteric artery syndrome are surgical correction of scoliosis in children 23) and a congenitally short ligament of Treitz.

Which is the most important artery in the small intestine?

Mesenteric artery The superior mesenteric artery (Figure 1 a) is the most significant intestinal blood supply, serving nearly all of the small intestine, cecum, ascending and transverse colons, and pancreas.

How is mesenteric artery stenosis treated in patients?

Mesenteric artery stenosis treatment. Patients with chronic mesenteric ischemia have traditionally been treated with mesenteric vascular surgical revascularization 37). Overall, the operative mortality remains high (approximately 7.5%–10%) 38).

The IMA serves the part of the rectum near the descending and sigmoid colons. As it runs its course, the IMA branches into the left colic and the superior rectal arteries, as well as the sigmoid branches. The IMA also has a similarly named venal counterpart, the inferior mesenteric vein.

The most common cause of superior mesenteric artery syndrome is severe weight loss including trauma, burns, anorexia nervosa and/or after prolonged bed rest 22). Other rare causes of superior mesenteric artery syndrome are surgical correction of scoliosis in children 23) and a congenitally short ligament of Treitz.

Mesenteric artery stenosis treatment. Patients with chronic mesenteric ischemia have traditionally been treated with mesenteric vascular surgical revascularization 37). Overall, the operative mortality remains high (approximately 7.5%–10%) 38).

Mesenteric artery The superior mesenteric artery (Figure 1 a) is the most significant intestinal blood supply, serving nearly all of the small intestine, cecum, ascending and transverse colons, and pancreas.