Patent ID: 8161970
Filing Date: 2012-04-24
Classification: A61M

Abstract:
1. A ventilator adapted to deliver a flow of gas to an airway of a user, the ventilator comprising: a source of gas adapted to provide the flow of gas; a conduit that carries the flow of gas to the airway of a patient; a first valve operatively coupled to the conduit and adapted to control a pressure or rate of the flow of gas provided to the patient by the ventilator; a pressure sensor operatively coupled to the conduit between the valve and the patient and adapted to monitor a pressure of the gas in the conduit; a controller adapted to control the valve based on an output of the pressure sensor; and a restrictor provided in the conduit between the pressure sensor and the patient such that a first volume is defined in the conduit between the valve and the restrictor and a second volume is defined in the conduit between the patient and the restrictor, wherein the first volume is less than the second volume, and wherein the restrictor includes a plurality of flow restricting elements with a first one of the flow restricting elements having an increased cross sectional area as compared to a second one of the flow restricting, elements.