Humidification in respiratory systems

Details Humidification in respiratory systems Humidification in respiratory systems

A - Human Necessities

61

M

128/73

A61M 16/16 (2006.01)

Patent

CA 2016164

ABSTRACT OF THE INVENTION 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.

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