金静强 杨红波 胡桃夹

摘要:目的 :分析胡桃夹综合征伴十二指肠淤积征的64排CT征象 。方法: 回顾性分析5例临床上诊断为胡桃夹综合征的病例的CT图片资料,重建矢状位上测量肠系膜上动脉(SMA)与腹主动脉(AA)的夹角,记为α,轴位上测量左肾静脉通过SMA 与AA的夹角间隙的狭窄管径宽度,记为a值,以及近肾侧扩张的左肾静脉宽度,记为b值,单位为毫米,并计算b/a值 ,观察十二指肠通过SMA 下方时的受压征象及受压点近端的肠管扩张充盈情况。结果: α为17°~40°,b/a比值为3.8~5.2 ,所有病例十二指肠升段通过肠系膜下方时明显受压,受压点近端肠腔充盈、肠管扩张,呈“鸟嘴样”改变。结论: 胡桃夹综合征及十二指肠淤积具有特征性CT表现,64排CT轴位可以测量a、b值,矢状位重建可以准确的测量α值,多角度显示十二指肠受压及受压点近端的肠管扩张,从而达到诊断目的。
关键词 :胡桃夹综合征 十二指肠淤积征 左肾静脉 64排CT
Abstract:Objective To analyze the features of nutcracker syndrome and duodenal stasia syndrome on 64-slice CT. Methods The CT imagings of 5 cases of clinically diagnosed NCS,were retrospectively analyzed, then the angle (α) between SMA and AA , the width of confined LRV (a)throuhing the room between SMA and AA and expanded LRV (b) after compression were measured, the figs (b/a ) were computed endly. the features of CT in compressed duodenum and expanded duodenum were observed in addition .Results The angles (α) ranged from 17°to 40°, the figs (b/a ) ranged from 3.8 to 5.2, the duodenum before compression were expanded obviously and bill- likely. Conclusion The imagings of nutcracker syndrome and duodenal stasia syndrome on 64-slice CT were characteristic ,and 64-slice CT is helpful for their diagnosis .
KeyWords: nutcracker syndrome duodenal stasia syndrome left renal vein 64-slice computed tomography
胡桃夹综合征(nutcracker syndrome,NCS)是一种少见病,临床工作中容易被忽视,是指左肾静脉(LRV)在汇入下腔静脉的行程中,在穿过肠系膜上动脉(superior mesenteric artery SMA)与腹主动脉(addominal aorts AA)夹角时受到挤压而引起的左肾静脉高压,从而引起的一系列临床表现,如左腰部疼痛,血尿、蛋白尿,以及肾静脉高压代偿后的性腺静脉扩张而引起的症状。十二指肠淤积征,是指十二指肠升段在左肾静脉水平或稍下方通过肠系膜上动脉与腹主动脉夹角间隙时受肠系膜动脉压迫,内容物通过障碍,而引起的消化道症状,如餐后不适,腹痛腹胀,严重者呕吐,胃储留等。……