Surgery – Respiratory method or device – Inhaled gas heated or humidified by exhaled gas
Patent
1988-02-18
1989-05-16
Burr, Edgar S.
Surgery
Respiratory method or device
Inhaled gas heated or humidified by exhaled gas
12820417, 12820413, 12820326, A62B 700, A62B 710, A61M 1600
Patent
active
048299979
ABSTRACT:
A heat exchanger, particularly useful as an inhalation rewarming apparatus for the treatment of hypothermia is provided herein. It includes an insulated container having one or more air inlets leading from lateral faces thereof to longitudinal inlet passages, then to transverse connecting passageways from the inlet passageways, and finally via a longitudinal hollow outlet conduit in the core thereof to an air outlet. A thermochemical heat source is disposed within the core of the container, such thermochemical heat source delineating two boundaries of the hollow outlet conduit and one boundary of each of the inlet passageways. A wrapping of a wettable, absorbent material encases the thermochemical heat source, such wrapping providing the actual above described boundaries. A loose filling or an air-permeable porous material having a large surface area and high heat capacity and high heat conductivity is disposed in the above-described passageways and outlet conduit. In this way, air passing from the air inlet follows along a path through the above-described passageways and outlet conduit in heat- and vapor-transfer contact with the loose filling and the wrapping, so that air emerging from the air outlet is both heated and humidified.
REFERENCES:
patent: 2610038 (1952-09-01), Phillips
patent: 3326214 (1967-06-01), McCoy
patent: 3747598 (1973-07-01), Cowans
patent: 4319566 (1982-03-01), Hayward et al.
patent: 4355636 (1982-10-01), Oetjen et al.
patent: 4597917 (1986-07-01), Lunsford
patent: 4652408 (1987-03-01), Montgomery
Douwens Robert J.
Hayward John S.
Asher Kimberly L.
Burr Edgar S.
University of Victoria
Weinstein Louis
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