Patent ID: 8944059
Filing Date: 2015-02-03
Classification: A61M

Abstract:
1. A non-invasive ventilation patient interface comprising: a frame configured to extend around a nose and mouth of a patient; an interchangeable patient interface configured to removably couple with the frame and, with the frame, to form a sealed volume when the non-invasive ventilation patient interface is worn by the patient, the interchangeable patient interface configured (i) to cover at least one of a nose or mouth of the patient and (ii) to detach from the frame while the frame is worn by the patient; a fresh gas entry port coupled to the frame and configured for coupling with a fresh gas supply; an exhaust gas vent port disposed on the interchangeable patient interface and configured for allowing expulsion of exhaust gas from said volume of said non-invasive ventilation patient interface in response to exhalation of said patient; and a filter media disposed in said exhaust gas vent port such that all exhaust gas must pass through said filter media, wherein said filter media is configured for providing a designated pressure drop across said filter media by selection of the filter media composition, thickness, layers, surface area, or porosity, so as to maintain a designated internal pressure above ambient pressure within said volume and for filtering contagions from said exhaust gas and diffusing said exhaust gas into atmosphere in which said patient is located; wherein the exhaust gas vent port and filter media are removably coupled with the interchangeable patient interface.