肠系膜上动脉与腹主动脉间隙面积测量及其与体重指数的关系

Measurement of the Area of Superior Mesenteric Artery-aorta and its Relationship with Body Mass Index

目的:通过CT增强图像测量肠系膜上动脉与腹主动脉间隙面积,并评估其与体重指数(BMI)的相关性。资料与方法:行腹部CT增强检查的538例非肠系膜上动脉综合征患者,根据体重指数及性别各分成4个级别(Ⅰ级:BMI<18.5 kg/m^2;Ⅱ级:BMI 18.5~24.9 kg/m^2;Ⅲ级:BMI 25~29.9 kg/m^2;Ⅳ级:BMI≥30 kg/m^2)。结果:男、女组间隙面积与BMI均呈显著正相关(r=0.50、0.55,P<0.01),间隙面积与BMI分级均呈中等相关(r=0.43、0.45,P<0.01)。随BMI增加,该间隙面积增大。结论:通过肠系膜上动脉与腹主动脉间隙面积和BMI呈显著正相关,可以为诊断SMAS提供参考值标准及筛查依据。

Objective： To investigate the relationship between body mass index（BMI） and the area of superior mesenteric artery（SMA）-aorta（AO） by enhanced CT scans. Methods： 538 patients referred for abdominal enhanced CT scans without clinical evidence of suspect SMAS were included. The patients were divided into four groups according to BMI（group 1： BMI 18.5 kg/m2; group 2： BMI 18.5 ~ 24.9 kg/m2; group 3： BMI 25 ~ 29.9 kg/m2; group 4： BMI ≥ 30 kg/m2） in both genders. The relationships between the area and BMI as well as BMI category of different genders were analyzed. Results： For both females and males, there was significant positive correlation between the area and BMI（r = 0.50, r = 0.55, respectively, P〈0.01）. The correlations between the BMI category and the area were moderate positives（r = 0.43, r = 0.45, respectively, P〈0.01）. The results showed a positive correlation between BMI and the area. Conclusion： The area measured by enhanced CT scans significantly correlates with BMI in normal population. The mean values can be used for the screening and diagnosis of superior mesenteric artery syndrome.