What is SMA and SMV?

BACKGROUND: To evaluate the appearance of the arrangement of the superior mesenteric artery (SMA) and superior mesenteric vein (SMV) on computed tomography (CT) in normal patients and in patients with abdominal masses.

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.

Likewise, what causes Malrotation? When rotation is incomplete and the intestine does not become fixed into that position, this creates intestinal malrotation. The malrotated intestine is prone to twisting in on its own blood supply, blocking the flow. This is called intestinal volvulus.

Correspondingly, what is the relationship of the superior mesenteric artery to the pancreas?

Superior mesenteric artery. The superior mesenteric artery is a major blood vessel in the digestive system. This artery branches off the abdominal aorta and supplies oxygenated blood to the pancreas and the lower parts of the intestine. This includes the lower duodenum, as well as transverse colon.

What do the superior and inferior mesenteric arteries supply?

In human anatomy, the superior mesenteric artery (SMA) arises from the anterior surface of the abdominal aorta, just inferior to the origin of the celiac trunk, and supplies the intestine from the lower part of the duodenum through two-thirds of the transverse colon, as well as the pancreas.

What are the branches of the SMA?

The terminal branches of SMA (ileocolic, right colic, middle colic) and inferior mesenteric artery (left colic, sigmoid) which supply the colon are linked together by a continuous arterial circle or arcade along the mesenteric border, known as the marginal artery of Drummond.

Can SMA syndrome be cured?

SMAS is a medically treatable cause of small bowel obstruction with an overall good prognosis. Conservative medical treatment with nutritional rehabilitation is the least risky of treatment options and is successful in the majority of patients.

What is mesenteric artery?

The mesenteric arteries take blood from the aorta and distribute it to a large portion of the gastrointestinal tract. The term mesenteric artery is also used to describe smaller branches of these vessels which, particularly in smaller animals, provide a significant source of vascular resistance.

How is SMA syndrome diagnosed?

Diagnosis. Superior mesenteric artery syndrome (SMAS) may be suspected based on signs and symptoms, although symptoms can be nonspecific. Tests that may be needed to evaluate a person with symptoms of SMAS include abdominal X-rays , upper GI series, ultrasound , arteriography, and computed tomography (CT scan).

What does mesenteric mean?

Mesentery: In general, a fold of tissue that attaches organs to the body wall. The word mesentery usually refers to the small bowel mesentery, which anchors the small intestines to the back of the abdominal wall. Blood vessels, nerves, and lymphatics branch through the mesentery to supply the intestine.

How many arteries are in your stomach?

The abdominal arteries arise from the abdominal aorta and are comprised of three groups of arteries: unpaired visceral arteries, paired visceral arteries, and parietal arteries.

What is the largest artery?


What organs does the inferior mesenteric artery supply?

The Inferior Mesenteric Artery. The inferior mesenteric artery (IMA) is a major branch of the abdominal aorta. It supplies arterial blood to the organs of the hindgut – the distal 1/3 of the transverse colon, splenic flexure, descending colon, sigmoid colon and rectum.

Is SMA Syndrome life threatening?

SMA syndrome is a rare but potentially life-threatening cause of abdominal pain. In SMA syndrome, this fat pad atrophies because of chronic vomiting resulting in compression of the proximal duodenum and the aorta. Typical symptoms include nausea, vomiting, and rapid weight loss.

Where does the midgut start?

The midgut consists of small bowel beginning with the duodenum distal to the point of entry of the ampulla of Vater. It also includes the cecum and appendix as well as the ascending colon and right one-half to two-thirds of the transverse colon.

What is superior mesenteric artery stenosis?

Mesenteric artery stenosis results in insufficient blood flow to the small intestine, causing intestinal ischemia. Chronic mesenteric ischemia is usually due to atherosclerosis, but is rarely caused by extensive fibromuscular disease or trauma.

Where is the superior mesenteric vein?

The superior mesenteric vein, also known as (SMV) transports blood from the small intestine and the cecum. It follows a path similar to that of the superior mesenteric artery. This vein is located in the abdominal cavity next to the superior mesenteric artery.

What is nutcracker syndrome?

Nutcracker syndrome is a vascular compression disorder that refers to the compression of the left renal vein most commonly between the superior mesenteric artery (SMA) and aorta, although other variations can exist 1.

Is superior mesenteric artery life threatening?

In some cases, SMA syndrome may occur alongside a serious, life-threatening condition such as cancer or AIDS. Even in these cases, though, treatment of the SMA syndrome can lead to a reduction in symptoms and an increased quality of life.