Performance of an oxygen delivery device for weaning potentially infectious critically ill patients
Performance of an oxygen delivery device for weaning potentially infectious critically ill patients
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DOI：
10.1111/j.1365-2044.2004.03802.x
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发表时间：
2004-07-01
期刊：
影响因子：
10.7
通讯作者：
Chan, MTV
中科院分区：
文献类型：
--
作者：
So, CY;Gomersall, CD;Chan, MTV
通过连接T形储气罐的热湿交换过滤器输送氧气，可满足高效细菌和病毒过滤以及低气体流量的感染控制要求。为了评估这种装置在脱离机械通气的危重患者中的表现，我们使用人类患者模拟器模拟了16名患者，测量了吸入氧气和二氧化碳的分数浓度以及在三种氧气流速下的呼吸功。氧浓度取决于最大吸气流速、潮气量和氧流量。根据吸入二氧化碳浓度显示，在高呼吸频率和低潮气量时，重复呼吸最好。用力吸气功相对较高(平均0.88 J.L(-1)[SD 0.30])。我们的结论是，这种氧气输送方法只适用于需要快速拔管的患者。
Oxygen delivery via a heat and moisture exchange filter with an attached T-shaped reservoir satisfies infection control requirements of high efficiency bacterial and viral filtration and low gas flows. In order to assess the performance of such a device in critically ill patients being weaned from mechanical ventilation, we simulated 16 patients using a human patient simulator, measuring fractional inspired oxygen and carbon dioxide concentrations and work of breathing at three oxygen flow rates. Oxygen concentration was dependent on peak inspiratory flow rate, tidal volume and oxygen flow rate. Rebreathing, as indicated by inspired carbon dioxide concentration, was greatest at high respiratory rates and low tidal volumes. Imposed inspiratory work of breathing was relatively high (mean 0.88 J.l(-1)[SD 0.30]). We conclude that this method of oxygen delivery is only suitable for patients in whom rapid extubation is anticipated.