Rhoades Carol, Thomas Frank
IHC Adult Life Flight, LDS Hospital, Salt Lake City, Utah 84143, USA.
Air Med J. 2002 Mar-Apr;21(2):43-8.
Detecting end-tidal pressure of carbon dioxide (PetCO2) is becoming increasingly common in the emergency transport setting. Several CO2 detection devices are suitable for emergency transport, including colorimetry, capnometry, and capnography. Capnography is the only device that displays a waveform of CO2 levels throughout the respiratory cycle. Analysis of this waveform is key to avoiding therapeutic errors. End-tidal PCO2 is best used for verifying endotracheal and nasal gastric tube placement and assessing the effectiveness of CPR. The use of capnography as a means of guiding manual or mechanical ventilatory therapy is unreliable in unstable, critically ill, or injured patients.
在紧急转运环境中，检测呼气末二氧化碳分压（PetCO2）变得越来越普遍。有几种二氧化碳检测设备适用于紧急转运，包括比色法、二氧化碳分压测定法和二氧化碳描记法。二氧化碳描记法是唯一一种能在整个呼吸周期显示二氧化碳水平波形的设备。对该波形的分析是避免治疗错误的关键。呼气末PCO2最常用于确认气管插管和鼻胃管的位置以及评估心肺复苏的效果。在不稳定、危重病或受伤患者中，使用二氧化碳描记法作为指导手动或机械通气治疗的手段并不可靠。
