压力支持通气模式下呼气触发灵敏度对呼吸力学指标的影响祆

目的研究压力支持通气(PSV)模式下呼气触发灵敏度(ETS)对慢性阻塞性肺疾病(COPD)患者呼吸力学指标的影响,揭示ETS对通气效果的影响。方法选取2006年12月至2008年1月收入我院呼吸内科重症监护室的COPD急性加重期合并呼吸衰竭行有创机械通气患者31例,行气管插管或气管切开接伽利略金型呼吸机。病情稳定后采用PSV模式,在其他参数不变的情况下随机调整ETS%水平于5%、35%、65%,通气30~60分钟后测量呼吸力学参数及血液动力学参数。应用自身对照的方法对不同ETS%水平下呼吸力学等参数进行比较。结果随着ETS%水平增加,潮气量、吸气时间、吸呼比、呼气流速减少或下降(P<0.01),不同ETS%水平的潮气量分别为(553.20±89.90)ml、(499.18±63.68)ml、(450.40±59.99)ml(P<0.01),吸气时间分别为(1.18±0.34)s(、0.88±0.21)s(、0.65±0.12)s(P<0.01),吸呼比分别为0.55±0.13、0.45±0.09、0.33±0.06(P<0.01),呼气流速分别为(52.49±7.95)L/min(、39.64±6.85)L/...

Effects of expiratory trigger sensitivity on respiratory mechanics in chornic obstructive pulmonary disease patients during pressure support ventilation

Objective To evaluate the effects of expiratory trigger sensitivity(ETS) on respiratory mechanics in chronic obstructive pulmonary disease(COPD) patients during pressure support ventilation(PSV).Methods Thirty-one patients with acute exacerbation of COPD complicating respiratory failure(RF) were enrolled in the study.The patients were admitted into respiratory intensive care unit(RICU) from December,2006 to January,2008 for invasive mechanical ventilation,who were applied with Galileo Gold breathing machine...