Omental branches of right gastroomental artery

The omental branches of the right gastroomental (gastroepiploic) artery are small arterial branches that arise from the right gastroomental artery as it courses along the greater curvature of the stomach between the layers of the greater omentum.

Origin and Course

The right gastroomental artery is a branch of the gastroduodenal artery (itself a branch of the common hepatic artery from the celiac trunk). It runs from right to left along the greater curvature of the stomach within the anterior layers of the greater omentum. As it travels, it gives off two sets of branches:

• Gastric branches: ascending branches that supply the anterior and posterior walls of the stomach.

• Omental branches: descending branches that pass inferiorly into the greater omentum.

Anatomy and Function

The omental branches descend between the layers of the greater omentum, forming an anastomotic vascular network within this peritoneal fold. Their key characteristics include:

• They are typically small, numerous, and variable in number.

• They supply the adipose and connective tissue of the greater omentum, which plays important roles in immune surveillance, fat storage, and intra-abdominal adhesion formation.

• They anastomose with omental branches arising from the left gastroomental artery (a branch of the splenic artery), creating an omental arterial arcade that provides collateral circulation within the omentum.

Clinical Significance

• Omental flaps and grafts: The omental blood supply, including these branches, is critical when the omentum is mobilized surgically for reconstructive procedures (e.g., omentoplasty for chest wall reconstruction, coverage of infected wounds, or reinforcement of surgical anastomoses).

• Surgical ligation: During gastrectomy or other upper abdominal procedures, these branches may need to be identified and ligated.

• Omental infarction: Torsion or thrombosis of omental branches can lead to segmental omental infarction, a cause of acute abdominal pain that may mimic appendicitis or diverticulitis.