Patent ID: 8434484
Filing Date: 2013-05-07
Classification: A61M

Abstract:
1. A method for ventilating a patient, the method comprising: controlling a change in gas mixture; measuring a gas flow rate in a patient circuit; measuring a pressure in a first chamber of an accumulator system with a plurality of chambers; closing a first valve to close a flow connection between the first chamber and a second chamber of the accumulator system to reduce a volume of the accumulator system; controlling a release of a second gas mixture from the second chamber of the accumulator system to an environment external to the patient circuit by controlling a first purge valve in the second chamber of the accumulator system; and controlling a pressure of the accumulator system by controlling the gas flow rate, wherein the pressure and the volume of the accumulator system are controlled based on at least one of the change in gas mixture, the measured gas flow rate, and the measured pressure of the accumulator system during ventilation of a patient.