What is SMA artery?

The superior mesenteric artery supplies the midgut from the ampullary region of the second part of the duodenum to the splenic flexure of the large intestine. The inferior pancreaticoduodenal artery arises from the SMA and, along with the superior pancreaticoduodenal artery, supplies the head of the pancreas.

How rare is SMAS?

How common is spinal muscular atrophy? Approximately 10,000 to 25,000 children and adults are living with SMA in the United States. It’s a rare disease that affects one out of 6,000 to 10,000 children.

What does SMA feel like?

Symptoms may include abdominal pain, fullness, nausea, vomiting, and/or weight loss. SMAS typically is due to loss of the mesenteric fat pad (fatty tissue that surrounds the superior mesenteric artery). The most common cause is significant weight loss caused by medical disorders, psychological disorders, or surgery.

How do you fix SMAS?

Options for surgery include a duodenojejunostomy or gastrojejunostomy to bypass the obstruction or a duodenal derotation procedure (otherwise known as the Strong procedure) to alter the aortomesenteric angle and place the third and fourth portions of the duodenum to the right of the superior mesenteric artery.

What is SMA syndrome symptoms?

Is SMA rare?

Spinal muscular atrophy affects 1 per 8,000 to 10,000 people worldwide. Spinal muscular atrophy type I is the most common type, accounting for about half of all cases. Types II and III are the next most common and types 0 and IV are rare.

Can people with SMAS eat?

Nutrition implications of SMA Syndrome Some individuals may be able to tolerate small, frequent meals or a liquid or soft diet. In contrast, other individuals may not be able to tolerate oral or gastric enteral feeding at all, in which case, nasojejunal feeding or parenteral nutrition may be needed.

What is the surgery for SMA?

Open duodenojejunostomy remains the standard operation for SMA syndrome. A minimally invasive approach to treating SMA syndrome, developed from bariatric surgery techniques, now offers an alternative to traditional laparotomy.

What passes between SMA and aorta?

Located under this portion of the superior mesenteric artery, between it and the aorta, are the following: left renal vein – travels between the left kidney and the inferior vena cava (can be compressed between the SMA and the abdominal aorta at this location, leading to nutcracker syndrome).

What does the SMA branch into?

After arising from the aorta, the SMA gives rise to four major branches: the inferior pancreaticoduodenal, the middle colic, the right colic and the ileocolic arteries. The intestinal branches of the SMA form a series of arcades, leading to a terminal arcade from which numerous end arteries enter the small bowel wall.