Browning J A, Linberg S E, Turney S Z, Chodoff P
Crit Care Med. 1982 Feb;10(2):82-5. doi: 10.1097/00003246-198202000-00003.
The determination of minute oxygen consumption (VO2) for metabolic studies on patients using either the Beckman Metabolic Cart (MMC) or the Respiratory Monitoring System (RMS) requires a stable fractional inspired oxygen concentration (FIO2). Measurement of VO2 on mechanically ventilated patients using the Bourns BEAR 1 and the Engstrom 311 and 312 was unsuccessful due to FIO2 variations greater than the acceptable limits. The inspiratory and expiratory O2 and CO2 waveforms were studied using various methods of supplying source gas to the ventilators. A method using an external air/oxygen blender was found that provided a stable FIO2 for metabolic measurements for each of the ventilators tested.
使用贝克曼代谢监测仪（MMC）或呼吸监测系统（RMS）对患者进行代谢研究时，测定微小氧耗量（VO2）需要稳定的吸入氧分数浓度（FIO2）。由于FIO2变化大于可接受限度，使用布尔恩斯BEAR 1、恩斯特龙311和312对机械通气患者测定VO2未成功。使用多种向呼吸机供应源气体的方法对吸气和呼气的氧气及二氧化碳波形进行了研究。发现一种使用外部空气/氧气混合器的方法可为所测试的每台呼吸机的代谢测量提供稳定的FIO2。
