脐、髂嵴顶点与腹主动脉分叉位置关系的对比影像解剖学研究

摘要

Objective To studythe cephalocaudal relationship ofabdominal aortic bifurcation relative toumbilicus and iliac crest vertex and their correlations with abdominal adipose tissue thickness and age. Methods The vertical distances,cephalocaudal relationship and other related anatomic parameters of aortic bifurcation relative to umbilicus and iliac crest vertex in 108 patientswere measured by consecutive abdominal CT scanning. The correlations of the acquired data with abdominal adipose tissue thickness and age were analyzed using Pearson correlation coefficient. Results Umbilicus was located at cephalad to aortic bifurcation in 67 patients(62.0%), caudal in 34(31.4%)andthe same level in 7(6.5%),with the vertical distance of(4.53 ± 17.51)mm to the aortic bifurcation. No statistically significant relationship was found between abdominal adipose tissue thickness(P>0.05) or age(P>0.05). Iliac crest vertex relative to aortic bifurcationwas located at cephalad,caudal and the same level in 31,71 and 6 patients,taking up 28.7%,65.7%and 5.6%,respectively. Its vertical distance to the bifurcation was(-6.34 ± 14.49)mm,nonrelated with abdominal adipose tissue thickness(P>0.05),but positively correlated with age(P<0.01). The difference in the cephalocaudal relationship of aortic bifurcation relative to umbilicus and iliac crest vertex was statistically significant(P<0.01). Conclusion Compared with iliac crest vertex,umbilicus is an important landmark of locating abdominal aortic terminal occlusion position in vitro because it mostly lies cephalad to aortic bifurcation in the front of the body,not easy to vary with abdominal adipose tissue thickness and age.%目的:探讨脐、髂嵴顶点在定位体外腹主动脉阻断位置中的价值.方法:CT影像下观测108例患者脐、髂嵴顶点与腹主动脉分叉的位置关系,采用Pearson相关系数分析该位置关系与肥胖和年龄的相关性.结果:腹主动脉分叉以上,脐至腹主动脉分叉的垂直距离(BU)大于髂嵴顶点至腹主动脉分叉的垂直距离(BC)(P<0.05);腹主动脉分叉以下,BU和BC比较差异无统计学意义(P>0.05).脐(62.0%)多在腹主动脉分叉以上,髂嵴顶点(65.7%)则多在腹主动脉分叉以下,两者与腹主动脉的位置关系比较差异有统计学意义(P<0.01).BU与腹部脂肪厚度、年龄皆无相关性(P>0.05);BC与腹部脂肪厚度无相关性(P>0.05),而与年龄呈正相关(P<0.01).结论:相较于髂嵴顶点,脐多位于腹主动脉分叉上方,身体前侧,不易随腹部脂肪厚度和年龄的改变而变化,是进行体外腹主动脉"末端"阻断的重要体表解剖标志.