Shaikh Harris, Wehrle Chase J., Khorasani-Zadeh Arshia
Michigan State Un Mclaren Oakland
Cleveland Clinic
The superior mesenteric artery is the second major branch of the abdominal aorta. It originates on the anterior surface of the aorta at the level of the L1 vertebrae, approximately 1 cm inferior to the celiac trunk and superior to the renal arteries. Anterior to the superior mesenteric artery lies the pylorus of the stomach, the neck of the pancreas, and the splenic vein. Posterior to the artery lies the uncinate process of the pancreas, the inferior portion of the duodenum, and the left renal vein. The left renal vein courses directly between the aorta and the takeoff of the superior mesenteric artery. This artery provides blood flow to the third portion of the duodenum, the jejunum, the ileum, the cecum, the ascending colon, and the proximal of the transverse colon.
肠系膜上动脉是腹主动脉的第二大主要分支。它起源于主动脉前表面第1腰椎水平，约在腹腔干下方1厘米且在肾动脉上方。肠系膜上动脉前方有胃幽门、胰颈和脾静脉。该动脉后方有胰腺钩突、十二指肠下部和左肾静脉。左肾静脉直接在主动脉和肠系膜上动脉起始部之间走行。此动脉为十二指肠第三部、空肠、回肠、盲肠、升结肠和横结肠近端供血。
