M型超声检测腹主动脉前后壁运动的初步研究  

Primary studies of anteroposterior abdominal aortic wall motion with M-mode ultrasound

作　　者：辛群[1] 蔡珠虹[2] 包俊敏[3] 梅志军[3] 景在平[3] 

机构地区：[1]解放军第四○一医院普外科,山东青岛266071 [2]第二军医大学附属长海医院超声影像科,上海200433 [3]第二军医大学附属长海医院血管外科,上海200433

出　　处：《外科理论与实践》2011年第2期147-150,共4页Journal of Surgery Concepts & Practice

摘　　要：目的:应用M型超声观测正常腹主动脉前后壁运动的特征。方法:采集健康人组、健康犬组、健康猪组腹主动脉的M型超声图像,测量动脉前壁和后壁振幅(da和dp)、舒张期动脉直径(Dd),取其平均值;并分别计算各组数值:前壁振幅/舒张期动脉直径(da/Dd),后壁振幅/舒张期动脉直径(dp/Dd)。结果:三组结果显示腹主动脉前壁振幅高于后壁振幅,差异有统计学意义(P<0.01)。各组中管壁振幅与管径呈正相关。da/Dd和dp/Dd组间比较,差异无统计学意义。结论:正常腹主动脉前、后壁的运动差异与腹主动脉瘤的形成有一定关系,提示血液动力学因素在腹主动脉瘤发病机制中起着重要作用。Objective To find out the characteristics of anteroposterior abdominal aortic wall motion and to consider the potential implications of such variations.Methods M-mode ultrasound was used to measure abdominal aortic wall motion in human（n=20） and 2 animal species [dogs（n=8）,and pigs（n=5）].Anterior wall displacement（da）,posterior wall displacement（dp）,and diastolic diameter（Dd） were measured.The ratio of displacement to the diameter was calculated（da/ Dd,and dp/ Dd）.Results Aortic diameter varied from to（6.34±0.84） mm（dog） to（13.76±1.11） mm（human）.Anterior wall displacement was about 3 times greater than the posterior among the species studied.The ratio of wall displacement to diastolic diameter were similar for the anterior and posterior walls.Wall displacement increased linearly with the diameter.Conclusions Abdominal aortic wall dynamics are similar in humans and animals regardless of the aortic size,with more anterior than posterior wall motion.These data suggest increased dynamic strain of the anterior wall,which may help explain why human abdominal aortic aneurysms initially develop anteriorly.Haemodynamics plays an important role in the abdominal aortic aneurysm pathogenesis.

关 键 词：M型超声 腹主动脉 腹主动脉瘤 血液动力学 

分 类 号：R445.1[医药卫生—影像医学与核医学]