Patent ID: 11957838
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A ventilator to ventilate an airway of a patient, the ventilator comprising:
a conduit having an inlet in fluid communication with a patient port, said patient port being configured to be fluidly connected to said airway;
a gas delivery element fluidly connected to said inlet and configured for selectively delivering fresh respiratory gas into the conduit;
a valve fluidly connected to said conduit, said valve being selectively operable to vent the conduit and thereby evacuate used respiratory gas via the patient port; and
a controller configured to alternatingly control the gas delivery element and the valve in a series of respiration cycles, wherein each respiration cycle includes a delivery of a main volume of fresh respiratory gas into the conduit, followed by an evacuation of a corresponding main volume of used respiratory gas,
said controller being further configured to alternatingly control the gas delivery element and the valve in a series of subcycles during a corresponding one of the respiration cycles, wherein each subcycle includes a delivery of an auxiliary volume of fresh respiratory gas into the conduit, followed by an evacuation of a corresponding auxillary volume of used respiratory gas, the auxiliary volume being smaller than, and distinct from, the main volume.