Godoy Armando Carlos Franco de, Vieira Ronan José, De Capitani Eduardo Mello
Universidade Estadual de Campinas, Campinas, SP, Brasil.
J Bras Pneumol. 2008 Oct;34(10):817-21. doi: 10.1590/s1806-37132008001000010.
To assess possible alterations in the tidal volume and peak inspiratory pressure delivered by seven models of manually operated self-inflating resuscitation bags as a function of the oxygen supply rate used.
The resuscitation bags tested were the following: Oxigel, models A and B; CE Reanimadores; ProtecSolutions; Missouri; Axmed; and Narcosul. For the measurements, a wall oxygen flow meter, a flow meter/respirometer, a resuscitation bag, a sensor (Tracer 5 unit), and a test lung were connected. In addition, the Tracer 5 unit was connected to a notebook computer. Oxygen supply rates of 1, 5, 10, and 15 L/min were used.
The tidal volume delivered by the Oxigel model A resuscitation bag when receiving oxygen at a rate of 15 L/min was approximately 99% greater than that delivered when receiving oxygen at a rate of 1 L/min. Similarly, peak inspiratory pressure was approximately 155% greater. Under the same conditions, the tidal volume delivered by the Narcosul resuscitation bag was 48% greater, and peak inspiratory pressure was 105% greater. The remaining resuscitation bags tested showed no significant alterations in the tidal volume or peak inspiratory pressure delivered.
Under the resistance and compliance conditions used, the resuscitation bags in which the oxygen inflow is directly to the interior of the bag had the patient valve stuck at the inspiratory position when receiving oxygen at a rate >or= 5 L/min, significantly increasing the tidal volume and peak inspiratory pressure delivered. This did not occur with the resuscitation bags in which the oxygen inflow is directed to the exterior of the bag.
评估七种手动自充气复苏袋在不同氧气供应速率下输送的潮气量和吸气峰压可能发生的变化。
所测试的复苏袋如下：Oxigel A型和B型；CE复苏器；ProtecSolutions；密苏里；Axmed；以及Narcosul。测量时，连接了一台墙壁氧气流量计、一台流量计/呼吸计、一个复苏袋、一个传感器（Tracer 5装置）和一个测试肺。此外，Tracer 5装置连接到一台笔记本电脑上。使用的氧气供应速率为1、5、10和15升/分钟。
当以15升/分钟的速率接收氧气时，Oxigel A型复苏袋输送的潮气量比以1升/分钟的速率接收氧气时输送的潮气量大约大99%。同样，吸气峰压大约大155%。在相同条件下，Narcosul复苏袋输送的潮气量增加48%，吸气峰压增加105%。所测试的其余复苏袋在输送的潮气量或吸气峰压方面未显示出显著变化。
在所使用的阻力和顺应性条件下，氧气直接流入袋内的复苏袋在氧气供应速率≥5升/分钟时，患者阀门会卡在吸气位置，显著增加输送的潮气量和吸气峰压。而氧气流入袋外的复苏袋则未出现这种情况。
