Burkart D J, Johnson C D, Reading C C, Ehman R L
Department of Diagnostic Radiology, Mayo Clinic and Foundation, Rochester, MN 55905.
Radiology. 1995 Mar;194(3):801-6. doi: 10.1148/radiology.194.3.7862982.
To quantify portal vein (PV) and superior mesenteric vein (SMV) flow before and after a standardized meal in healthy volunteers and to prospectively evaluate patients with a clinical suspicion of chronic mesenteric ischemia on the basis of magnetic resonance (MR) measurement of flow in the mesenteric venous system in volunteers.
Cine phase-contrast flow measurements were acquired in 10 asymptomatic volunteers and in 10 patients.
In volunteers, the difference between the fasting and post-prandial flows in the SMV and PV was significant (P < .001), with a peak flow augmentation of 245% +/- 74 and 70% +/- 29, respectively. Postprandial augmentation of peak flow in the SMV was significantly less in patients with mesenteric ischemia compared with volunteers (64% +/- 28; P = .02). SMV flow augmentation in patients without mesenteric ischemia did not differ significantly from that in volunteers (206% +/- 36; P = .31).
Measurement of postprandial flow augmentation in the SMV with MR imaging shows promise as a noninvasive screening test for chronic mesenteric ischemia.
量化健康志愿者在标准化进餐前后的门静脉（PV）和肠系膜上静脉（SMV）血流，并基于对志愿者肠系膜静脉系统血流的磁共振（MR）测量，前瞻性评估临床怀疑为慢性肠系膜缺血的患者。
对10名无症状志愿者和10名患者进行电影相位对比血流测量。
在志愿者中，SMV和PV的空腹血流与餐后血流之间的差异具有统计学意义（P <.001），峰值血流分别增加245%±74和70%±29。与志愿者相比，肠系膜缺血患者餐后SMV峰值血流增加明显较少（64%±28；P =.02）。无肠系膜缺血患者的SMV血流增加与志愿者无显著差异（206%±36；P =.31）。
用MR成像测量餐后SMV血流增加有望作为慢性肠系膜缺血的无创筛查试验。
