초록 ▼

The amount of breathable liquid eliminated from a mammal through volatilization in the lungs and/or through skin transpiration is detected by measuring the amount of saturation of the expiratory gas by vapors or the breathable liquid. Instantaneous saturation values are employed to gauge the amount

The amount of breathable liquid eliminated from a mammal through volatilization in the lungs and/or through skin transpiration is detected by measuring the amount of saturation of the expiratory gas by vapors or the breathable liquid. Instantaneous saturation values are employed to gauge the amount of interaction in the lungs between the breathable liquid and respiratory gas flowing therein and to control selected feedback operations to maintain the maximum possible amount of interaction therebetween. The saturation level of expiratory gas is also employed to optimize operating parameters or a system for recovering the breathable liquid from the expiratory gas, directly from the patient, or from a gas or liquid ventilator. The saturation level or expiratory gas is also employed to perform functional residual capacity studies and to correct for errors in conventional functional residual capacity measurements performed while a patient undergoes partial liquid ventilation. When breathable liquid is employed as a blood substitute, the quantification or the loss of the breathable liquid from volatilization and transpiration helps to determine when to replenish the breathable liquid in the bloodstream. Vapors of one form of breathable liquid, perfluorocarbon, are employed to determine the functional residual capacity of a mammal\s lung.

대표청구항 ▼

A process for determining the amount of interaction in a mammalian lung between a breathable liquid in the lung and a respiratory gas flowing into and out of a pulmonary pathway in communication with the lung, said process comprising the steps of: (a) sampling expired respiratory gas from the pulmon

A process for determining the amount of interaction in a mammalian lung between a breathable liquid in the lung and a respiratory gas flowing into and out of a pulmonary pathway in communication with the lung, said process comprising the steps of: (a) sampling expired respiratory gas from the pulmonary pathway; (b) passing the sampled gas through a measurement detector, the detector outputting a discrete value representative of a property of the gas; (c) comparing the discrete value to previously determined discrete values representative of respiratory gas fully saturated with vapors of breathable liquid and respiratory gas unsaturated by vapors of breathable liquid; and (d) determining from the comparison the amount of interaction, wherein discrete values near the fully saturated discrete value indicates maximum interaction and discrete values near the unsaturated discrete value indicates minimum interaction.