Surgery – Respiratory method or device – Means for heating respiratory gas or respiration device
Patent
1992-06-19
1995-01-03
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for heating respiratory gas or respiration device
128911, 128912, 12820714, 604163, 604171, 138122, A61M 1600, A61M 532, A62B 700, F24J 300
Patent
active
053776704
ABSTRACT:
The present invention provides an insulated breathing tube arrangement to prevent heat loss from the inhalant gas in a recirculatory aided breathing circuit thereby reducing internal vapor condensation commonly associated with such breathing circuits while also stabilizing the relative temperature and humidity within such breathing circuits. The insulated breathing tube arrangement includes a thin flexible partially longitudinally compressed casing surrounding a thicker corrugated tube. The thin casing allows for hairpin bending of the breathing tube arrangement and provides an insulating dead air space around the corrugated tube. In another arrangement selected enlarged corrugations are provided in spaced relation along the corrugated tube to engage the inner surface of the casing in a preselected spaced arrangement with respect to said corrugated tube to compartmentalize insulating dead air spaces between the tube and the casing.
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