A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
137/1.52
A61M 16/00 (2006.01) A61M 16/10 (2006.01) A61M 16/16 (2006.01) A61M 16/08 (2006.01)
Patent
CA 1225303
HUMIDIFIER SYSTEM ABSTRACT A humidifier system including a humidifier chamber and heater assembly, microprocessor based control circuitry, and a housing for the control circuitry. The humidifier system is adapted to provide air at nearly 100 percent relative humidity and at a predetermined temperature (e.g. 35°C) to a medical (e.g. critical care) patient. The humidifier chamber includes a continuous spiral heat exchange path which extends between a vapor storage chamber and an outlet of the humidifier chamber at which an air heating tube is connected, so that outgoing air can be delivered to the patient. The vapor storage chamber is interfaced with a ventilator source of incoming air and a relatively small reservoir in which a supply of water is boiled by the heater assembly for providing vapor saturated air from the vapor storage chamber to the heat exchange path. The control circuitry includes a pair of sensors which are responsive to the temperatures of the outgoing humidified air at the humidifier chamber outlet and at the patient end of the heating tube. The temperatures sensed are used to control the energization of both the heater assembly and a heating element of the heating tube, so that humidified air can be delivered to the patient at the predetermined temperature and with minimal condensate rainout.
494268
Bartels Harold U.
Sveen Finn
Bear Medical Systems Inc.
Gowling Lafleur Henderson Llp
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