Goldberg B B, Perlmutter G
J Clin Ultrasound. 1977 Jun;5(3):185-7. doi: 10.1002/jcu.1870050310.
With the use of gray scale B scan ultrasound, it is now feasible in many cases to detect portions of the superior mesenteric artery (SMA) arising from the aorta. Thus, it is possible to measure the aortomesenteric angle and distance. We evaluated a series of patients by ultrasound to determine the normal values for the SMA angle, distance, and lumen diameter. Patients were also examined who had pathological conditions that might produce an alteration in the angle and distance. Abnormal widening was observed in patients with aortic aneurysms and para-aortic lymphosarcomatous nodes. In patients suspected of having duodenal ileus, there was evidence of narrowing of the superior mesenteric artery angle and distance. However, a comparable group of asymptomatic patients of the same age showed a similarly narrowed angle and distance. It was thus concluded that the narrowing of the aortomesenteric angle and distance is not a cause of duodenal ileus. Knowledge of the SMA and aortic lumen diameter has been helpful in selecting the proper catheter and approach for selective arteriography.
通过使用B型灰阶超声，现在在许多情况下能够检测到发自主动脉的肠系膜上动脉（SMA）的部分。因此，可以测量主动脉与肠系膜的夹角和距离。我们通过超声对一系列患者进行评估，以确定SMA夹角、距离和管腔直径的正常值。还对患有可能导致夹角和距离改变的病理状况的患者进行了检查。在患有主动脉瘤和主动脉旁淋巴肉瘤性淋巴结的患者中观察到异常增宽。在疑似患有十二指肠肠梗阻的患者中，有肠系膜上动脉夹角和距离变窄的证据。然而，一组年龄相仿的无症状患者也表现出类似变窄的夹角和距离。因此得出结论，主动脉与肠系膜夹角和距离变窄不是十二指肠肠梗阻的病因。了解SMA和主动脉管腔直径有助于选择合适的导管和选择性动脉造影的入路。
