摘要
Abstract
Objective To investigate the difference of tidal volume among presupposition (preset VT) or the practical(VTE) and the bellows(bellows VT) in DatexOhmeda anesthesia machine under adult ventilation mode.Methods Totally 11 DatexOhmeda anesthesia machines were chosen and the simulation study was conducted under the preset VT of 400,500,600,700,800 and 900 mL,with the oxygen flow fixed in 2 L/min.The values of bellows VT,VTE,minute ventilation (VE),the peak value showed in airway pressure table (Pmax1) or on the numerical display (Pmax2),average airway pressure (Pmean) were determined.Results The comparison of respiratory parameters of all the anesthesia machines was performed.When preset VT was between 500 mL and 900 mL,the bellows VT increased significantly than the preset VT.When preset VT was 400,500,700 or 900 mL,VTE was smaller than the preset VT,with the difference less than 10％.When preset VT was between 400 and 900 mL,VTR was smaller than the bellows VT.The comparison of respiratory parameters among the every type of anesthesia machine was also conducted.The bellows VT of Aestiva/5(7900) (preset VT 500,700 and 800 mL) and Aespire(7100)(preset VT 500,700,800 and 900 mL) were higher than the preset VT.There was a good linear correlation between Pmax2 and Pmax1.Conclusions DatexOhmeda anesthesia machine has some differences among preset VT,VTE and the bellows VT,but the first two indexes are important in clinical operation.关键词
麻醉机/潮气量/成人/通气模式Key words
anesthesia machine/ tidal volume/ adult/ ventilation mode分类
医药卫生
