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目的评价64排螺旋CT对主动脉夹层肾动脉受累时肾功能的应用价值。方法回顾性分析57例发生主动脉夹层并且肾动脉受累患者的临床及CT资料,分析其双侧肾脏增强扫描时同区域CT值差异,评价患者肾功能情况。结果 57例患者中,双侧肾脏同区域平均CT值差值0~30 HU者23例,患者均无肾功能异常者;平均CT值差值30~60 HU者26例,其中肾功能异常者5例(19.2%);平均CT值差值60~90 HU者8例,其中肾功能异常5例(62.5%)。结论主动脉夹层患者肾动脉受累时肾血供相应减少,可发生急性肾功能不全。64排螺旋CT可以通过测量双侧肾脏同区域CT值的差值评价患者肾功能情况。
Objective To evaluate the value of 64-slice spiral CT in detecting renal function in patients with aortic dissection and renal artery involvement. Methods The clinical data and CT data of 57 patients with aortic dissection and renal artery involvement were analyzed retrospectively. The differences of CT values in different regions of bilateral renal enhancement scan were analyzed to evaluate the renal function. Results Among the 57 patients, there were 23 patients with 0 ~ 30 HU difference between the two sides of the kidney and the average CT value of the region. None of the patients had renal dysfunction. Among them, 26 patients had a mean CT value of 30 ~ 60 HU, 5 cases (19.2%), 8 cases with average CT value difference of 60 ~ 90 HU, of which 5 cases were renal dysfunction (62.5%). Conclusions Aortic dissection patients with renal artery involvement corresponding decrease in renal blood supply can occur acute renal insufficiency. 64-slice spiral CT can assess the renal function of patients by measuring the difference between bilateral renal CT values.