Patent ID: 8701658

Claim:
A ventilation circuit adaptor for providing ventilation gas and aerosol, the adaptor having an aerosol flowpath and a ventilation gas flowpath, the adaptor comprising: (a) an aerosol flow chamber having a wall including an inner wall surface, the aerosol flow chamber extending along a longitudinal axis from an aerosol inlet port to a patient interface port; (b) an aerosol flow channel disposed within the aerosol flow chamber, the aerosol flow channel having a longitudinal axis coaxial with the longitudinal axis of the aerosol flow chamber, the aerosol flow channel having a wall including an inner wall surface and an outer wall surface and extending from an aerosol flow channel inlet port to an aerosol flow channel outlet port, wherein the aerosol flow channel outlet port is recessed longitudinally within the aerosol flow chamber and is in fluid communication with the patient interface port, wherein the aerosol flow channel inlet port is sealingly connected to the inner wall surface of the aerosol flow chamber, wherein a cross-sectional area of the aerosol flow channel at the aerosol flow channel outlet port, including its wall, is smaller than a cross-sectional area of the aerosol flow chamber to provide an annular zone bounded by the outer wall surface of the aerosol flow channel and the inner wall surface of the aerosol chamber, the annular zone being in fluid communication with the patient interface port, such that the aerosol flowpath extends from the aerosol flow chamber inlet port, through the aerosol flow channel, and out the patient interface port; and (c) a ventilation gas flow chamber extending from a ventilation gas inlet port through the wall in the aerosol flow chamber, through and in fluid communication with the annular zone and the patient interface, and through the wall in the aerosol flow chamber and to a ventilation gas outlet port, such that the ventilation gas flowpath extends from the ventilation gas inlet port, and through the annular zone to the ventilation gas outlet port.