Oxygen mixing in a blower-based ventilator

Details Oxygen mixing in a blower-based ventilator Oxygen mixing in a blower-based ventilator

A - Human Necessities

61

M

A61M 16/00 (2006.01)

Patent

CA 2234397

This invention is an oxygen mixing arrangement for, or in a pressure support ventilator in which a modular oxygen-providing assembly is selectively inserted into a greater respiration apparatus (200). Mixing accuracy and controllability is maintained by using gas supplies that have a wide range of pressures. Further, oxygen leakage is minimized by connecting the modular oxygen-providing assembly at a point of the respiration circuit of the greater respiration apparatus (200) that is downstream from a valving arrangement normally used for venting patient exhaust flow and for controlling system pressure by venting excess gas flow to the ambient atmosphere.

L'invention concerne un dispositif mélangeur d'oxygène destiné à ou disposé dans un respirateur d'assistance par pression, dans lequel un ensemble modulaire d'alimentation en oxygène peut être sélectivement inséré dans un respirateur (200) plus grand. La précision du mélange et sa régulation se font par des alimentations en gaz ayant une plage de pression large. La fuite d'oxygène est minimisée par la connexion de l'ensemble d'alimentation en oxygène, qui se fait au niveau d'un point du circuit de respiration du respirateur (200) plus grand situé en aval d'un dispositif soupape normalement utilisé pour ventiler le flux expiratoire d'un patient et pour réguler la pression du système en ventilant un flux gazeux excédentaire vers l'atmosphère ambiante.

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