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IMPROVED METHOD OF MAINTAINING CONSTANT ARTERIAL PCO2 DURING INCREASED MINUTE VENTILATION AND MEASUREMENT OF ANATOMIC AND ALVEOLAR DEAD SPACE
IMPROVED METHOD OF MAINTAINING CONSTANT ARTERIAL PCO2 DURING INCREASED MINUTE VENTILATION AND MEASUREMENT OF ANATOMIC AND ALVEOLAR DEAD SPACE
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机译:在分钟通气量增加和解剖和肺动脉死腔测量中保持恒定动脉PCO2的改进方法
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摘要
A method is disclosed to maintain isocapnia when breathing exceeds baseline breathing and a circuit therefore. The circuit has a non rebreathing valve, a source of fresh gas, a fresh gas reservoir and a source of gas to be inhaled when minute ventilation exceeds fresh gas flow. The flow of fresh gas is equal to minute ventilation minus anatomic dead space, wherein additional inhaled gas exceeding fresh gas flow has a partial pressure of CO2 equal to the partial pressure of CO2 of arterial blood. Also disclosed is a method to identify the anatomic dead space and alveolar dead space by using a breathing circuit consisting of a non rebreathing valve, a source of fresh gas, a fresh gas reservoir and a source of gas with a partial pressure of CO2 substantially equal to that of arterial blood.
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