直接気管内流量法による肺毛細管血流波測定の考案

概要

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Instantaneous pulmonary capillary blood flow had been estimated by a body plethysmograph technique which consisted of measureing the uptake of inspired nitrous oxide to the pulmonary capillary blood using the Fick principle. Because of difficulty in placeing the anesthetized patient into the body plethysmograph, the measurement of the pulmonary capillary blood flow during anesthesia was hard to perform.Since open glottis and apneuic state is obstained easily during endotracheal anesthesis, we designed a new technique, without the body plethysmograph, to measure the uptake of nitrous oxide by connecting the highly sensitive flow meter directly to endotracheal tube. Instantaneous pulmonary capillary blood flow in man obtained by substraction of intratracheal flow waves of inspired 80% nitrous oxide from that of 100% oxide at apneuic rest end-expiratory level.This technique is considered to be useful to estimate the pulmonary capillary blood flow during anesthesia and respiratory care.
日本医療機器学会の論文
1982-07-01