超声心动图研究正压通气对犬心功能的影响及其机制

被引：11

作者：

王泓

曹铁生

丁康

段云友

刘杰

杨一林

机构：

[1] 第四军医大学唐都医院超声诊断科

来源：

中华超声影像学杂志 | 2005年 / 01期

关键词：

超声心动描记术; 间歇正压通气; 心室功能; 犬;

D O I：

暂无

中图分类号：

R445.1 [超声波诊断];

学科分类号：

摘要：

目的观察正压通气时心内瓣口血流速度和左、右心功能的变化,研究正压通气影响血流动力学机制的新理论。方法11条杂种犬,用超声心动图测定正压通气时心内各瓣口的血流速度,右室、左室每搏量,左室容积和射血分数的变化。结果三尖瓣和肺动脉瓣口血流速度正压吸气相减低,呼气相增加;二尖瓣和主动脉瓣口血流速度变化与之相反(P<0.05)。与自主呼吸相比,正压吸气时,右室每搏量减少,左室舒张末和收缩末容积减小,射血分数降低(P<0.05)。结论正压通气使室间隔趋于右移,同时,肺血管床回心血量增加,但与自主呼吸时相比,腔静脉回心血量相对减少,故心功能降低。

引用

页码：62 / 65

页数：4

共 9 条

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