Mogue L R, Rantala B
Puritan-Bennett Corporation, Overland Park, KS 66210.
J Clin Monit. 1988 Apr;4(2):115-21. doi: 10.1007/BF01641813.
The process of monitoring carbon dioxide in the respired gas is described. The physical principle employed in many capnometers is nondispersive infrared absorption: An infrared light beam is projected through a gas sample and the intensity of transmitted light is measured. Differentiation between sidestream and mainstream capnometers is made, where appropriate, in the description of this process. Important factors such as sampling flow rate, water removal, exhaust gas scavenging, measurement interference, calibration, the effect of water vapor, and measurement chamber cleaning are described as part of this process. The value of the data displayed, once derived, is based on the knowledge that carbon dioxide is an end product of the metabolism of oxygen-consuming organisms. The data can be a useful indicator of metabolic, circulatory, and ventilatory processes.
描述了监测呼出气体中二氧化碳的过程。许多二氧化碳监测仪采用的物理原理是非分散红外吸收：将一束红外光束投射通过气体样本，并测量透射光的强度。在描述此过程时，适当地区分了旁流式和主流式二氧化碳监测仪。采样流速、水分去除、废气清除、测量干扰、校准、水蒸气的影响以及测量室清洁等重要因素作为此过程的一部分进行了描述。一旦得出所显示数据的值，其依据是二氧化碳是耗氧生物新陈代谢的终产物这一知识。这些数据可以是代谢、循环和通气过程的有用指标。
