Oxygen blending in a piston ventilator

A - Human Necessities – 61 – M

Patent

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Details

A61M 16/12 (2006.01) A61M 16/00 (2006.01) A61M 16/20 (2006.01)

Patent

CA 2315675

A piston ventilator is disclosed herein which uniquely includes an oxygen blending module which supplies oxygen enhancement for aiding patients requiring respiratory treatment. The oxygen blending module supplies a preselected enrichment of oxygen to a piston and cylinder assembly wherein the amount of oxygen permitted to flow therein is continuously monitored and controlled according to the volume above the piston in the cylinder as calculated by a controller. The oxygen blending module includes a flow sensor which monitors the flow of supplemental oxygen into the piston and cylinder assembly, and further includes a primary oxygen control valve which restricts the flow of oxygen through the flow sensor to the piston and cylinder assembly depending on the difference between the calculated desired amount of oxygen and the target amount of oxygen provided to the controller.

L'invention concerne un ventilateur à piston incorporant un nouveau module de mélange d'oxygène effectuant une alimentation augmentée en oxygène permettant d'aider les patients nécessitant un traitement respiratoire. Ce module alimente un ensemble piston et cylindre en une quantité présélectionnée enrichie d'oxygène contrôlée en continu et régulée en fonction du volume situé en position supérieure dans le piston du cylindre et calculé par une unité de commande. Ce module comprend un capteur d'écoulement qui contrôle l'écoulement d'oxygène supplémentaire vers l'intérieur de l'ensemble piston et cylindre et comporte, de plus, un clapet de régulation d'oxygène primaire limitant l'écoulement de l'oxygène à travers le capteur d'écoulement vers l'ensemble piston et cylindre en fonction de la différence entre la quantité calculée d'oxygène souhaité et la quantité ciblée d'oxygène alimentant l'unité de commande.

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