Heat and moisture filter exchanger and method
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United States of America Patent
Stats
-
Mar 25, 2008
Grant Date -
Jul 1, 2004
app pub date -
Sep 4, 2003
filing date -
Sep 16, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A heat and moisture exchanger for both conducting a stream of air produced by a ventilator to a moisturizing medium and internally bypassing the moisturizing medium if aerosolized medication is introduced into the stream includes a housing having a ventilator-side port coupled to an outlet of a ventilator and a source of aerosolized medication. The housing has a patient-side port for coupling to a patient to provide ventilation including either air or air carrying aerosolized medication. A first path conducts air from the ventilator-side port through the moisturizing medium and the patient-side port, and a second path conducts air carrying aerosolized medication from the ventilator-side port directly to the patient-side port. A two-way valve mechanism in the housing selectively couples the ventilator-side port into fluid communication with one or the other of the first and second paths.
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