Loading patent…
AssigneeTemple University of the Commonwealth System of Higher Education
InventorsThomas H. Shaffer, Marla R. Wolfson, Thomas F. Miller, Raymond Foust, III
Estimating the term…
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.
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 process for determining the volume loss rate of breathable liquid in a lung while respiratory gas flows into and out of a pulmonary pathway in communication with the lung, said process comprising the steps of:
A process for controlling the amount of breathable liquid in a lung while respiratory gas flows into and out of a pulmonary pathway in communication with the lung, said process comprising the steps of:
A process for determining and controlling 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 process for monitoring and reducing residual amounts of breathable liquid in a mammalian lung after switching from ventilating the lung with breathable liquid to ventilating the lung with gas, respiratory gas flowing into and out of a pulmonary pathway in communication with the lung, said process comprising the steps of:
A process for monitoring the operation of a breathable liquid vapor recovery system which recovers breathable liquid from a stream of gas input thereto, the process comprising the steps of:
A process for monitoring and controlling the operation of a breathable liquid vapor recovery system which recovers breathable liquid from a stream of gas input thereto, the system including a condenser for condensing the vapors of the breathable liquid and a thermostat for controlling the temperature of the condenser, the process comprising the steps of:
A process for quantifying the evaporative loss rate of liquid perfluorocarbon from the blood supply of a mammal via the respiratory system when the perfluorocarbon is employed as a blood substitute, the process comprising the steps of:
A process for quantifying the evaporative loss of liquid perfluorocarbon from a mammal via transpiration loss through the skin, the process comprising the steps of:
A process employing perfluorocarbon vapor to determine the functional residual capacity, FRC, of a mammal's lung, the process comprising the steps of:
A method for correcting errors in a functional residual capacity measurement made while a patient undergoes partial liquid ventilation with a breathable liquid, the errors being caused by the presence of vapors of the breathable liquid in expired respiratory gas, the method comprising the steps of:
Dependencies are inferred from the claim text.