0397446-A2 is referenced by 1 patents and cites 5 patents.

A respiratory humidifier has an outer flexible, gas-tight bag 10 containing water 12 and an exothermic chemical heater 16. A sandwich of an open-celled foam 36 and a vapour-permeable/water impermeable layer 30 is secured on the inside of the bag by compressing and welding the sandwich to the wall of the bag to form a labyrinth path for gas through the foam. Water vapour in the bag permeates the foam so that respiratory gas is humidified without contacting the water.

Humidification in respiratory systems.
Application Number
EP19900304944 19900508
Publication Number
0397446 (A2)
Application Date
May 8, 1990
Publication Date
November 14, 1990
Beran Anthony Vincent
Respiratory Support Prod
A62B 09/00
A61M 16/16
A61M 16/10
A61M 16/16
View Original Source Download PDF