Heat and moisture exchange (HME) selection device

The heat and moisture exchange (HME) selection device uses a rotating collar to allow switching from HME mode for heat and moisture exchange to AEROSOL mode without opening the ventilator circuit. In HME mode, the unit functions as a heat and moisture exchanger. In AEROSOL mode, the heat and moisture function is bypassed for administration of an aerosolized or MDI medication.