Modular pulmonary treatment system

Abstract

A patient interface system for delivering a gas to a patient includes a patient interface device that includes at least one inhalation valve and at least one exhalation valve. The system also includes a venturi device that has at least one port for connection to a gas source. The venturi device has at least one primary air entrainment window and at least one secondary air entrainment window which is downstream of the at least one primary air entrainment window. The inhalation valve is disposed between: (1) the main body and (2) the primary and secondary air entrainment windows of the venturi device. At least one of the primary air entrainment window and secondary air entrainment window includes a means for closing the respective window, thereby changing a degree at which the respective window is open and changing a flow rate of the air flowing through the respective window.

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         17 . A patient interface system for delivering a gas to a patient comprising:
 a patient interface device include a main body for placement against a face of the patient for delivering the gas thereto, the patient interface device including at least one inhalation valve and at least one exhalation valve; and   a venturi device that is fluidly connected to the free second end of the conduit portion, the venturi device having at least one port for connection to a gas source, the venturi device having at least one primary air entrainment window and at least one secondary air entrainment window which is downstream of the at least one primary air entrainment window and thus closer to the main body of the patient interface device;   wherein the at least one inhalation valve is disposed between: (1) the main body and (2) the primary and secondary air entrainment windows of the venturi device;   wherein at least one of the primary air entrainment window and secondary air entrainment window includes a means for closing the respective window, thereby changing a degree at which the respective window is open and changing a flow rate of the air flowing through the respective window.   
     
     
         18 . The patient interface system of  claim 17 , wherein the primary and secondary air entrainment windows permit atmospheric air to be entrained with and mix with gas from the gas source so as to form a gas mixture that flows through the at least one inhalation valve when the inhalation valve opens during patient inhalation. 
     
     
         19 . The patient interface system of  claim 17 , wherein the first air entrainment window is formed in a first venturi part and the second air entrainment window is formed in a second venturi part that is separate from but mates with the first venturi part to form a venturi assembly that is fluidly attached to the main body. 
     
     
         20 . The patient interface system of  claim 17 , wherein the means comprises a shutter that is coupled to the venturi device and is rotatable about the secondary air entrainment window so as to change a degree at which the secondary air entrainment window is open to atmosphere. 
     
     
         21 . The patient interface system of  claim 19 , wherein the first part of the venturi device includes two ports for connection to the gas source, the two ports having respective orifices that define a flow rate of gas through the respective port, wherein the orifices of the two ports have different dimensions resulting in different gas flow rates, wherein first ends of the two ports are located proximate the first air entrainment window. 
     
     
         22 . The patient interface system of  claim 21 , wherein the secondary air entrainment window is defined in part by a first air entrainment opening formed in the second part and the means comprises a shutter that is coupled to the second part of venturi device and is rotatable about the secondary air entrainment window so as to change a degree at which the secondary air entrainment window is open to atmosphere as a result of registration between a second air entrainment opening that formed in the shutter and the first air entrainment opening of the second part, the shutter including a gas concentration pointer and the second part include gas concentration indicator markings disposed circumferentially about the second part, the gas concentration indicator markings corresponding to the gas concentration which is realized when the shutter is in a select position relative to the second part and the pointer is aligned with one of the gas concentration markings. 
     
     
         23 . The patient interface system of  claim 22 , wherein one of the gas concentration markings includes two gas concentration values which correspond to the two ports which have two different gas flow rates. 
     
     
         24 . A patient interface system for delivering a gas to a patient comprising:
 a patient interface device for delivering a gas to a patient comprising:
 a main body for placement against a face of the patient, the main body including a conduit portion that is open at a first end to a hollow interior of the main body and a free second end for attachment to another object in a sealed manner; 
 at least one exhalation valve assembly that is disposed within a first port formed in the main body and includes an exhalation valve member that is configured to vent exhaled air when open; 
 a primary inhalation valve assembly that is disposed within the conduit portion and includes a primary valve member that moves between open and closed positions; and 
 a secondary inhalation valve assembly that is disposed within a second port formed in the main body and includes a secondary valve member that moves between open and closed positions; and 
   a first accessory that is fluidly attached to the conduit portion;   wherein the primary inhalation valve assembly has a first flow resistance associated therewith and the second inhalation valve assembly has a second flow resistance associated therewith which is greater than the primary inhalation valve assembly and as a result, the secondary inhalation valve assembly acts as an emergency inhalation valve.   
     
     
         25 . The patient interface system of  claim 24 , wherein the first accessory comprises a reservoir device having a flexible, expandable chamber and a connector that is fluidly connected to the conduit portion, the connector being defined by a body having a first gas port for connection to a gas source and a separate second gas port for connection to the gas source, wherein the second gas port includes a first air entrainment opening formed therein and a rotatable shutter having a second air entrainment opening formed therein is rotatably coupled about the second gas port, the first and second air entrainment openings defining an air entrainment window which is selectively open to atmosphere, the reservoir device being free of a valve member. 
     
     
         26 . The patient interface system of  claim 25 , wherein the first gas port is located closer to a top open end of the connector compared to the second gas port and the shutter including a gas concentration pointer and the connector includes gas concentration indicator markings disposed vertically on an exterior surface of the connector, the gas concentration indicator markings corresponding to the gas concentration which is realized when the shutter is in a select position relative to the second part and the pointer is aligned with one of the gas concentration markings. 
     
     
         27 . The patient interface system of  claim 24 , wherein the first accessory comprises a device selected from the group consisting of an MDI and a nebulizer. 
     
     
         28 . The patient interface system of  claim 24 , wherein the conduit portion further has a secondary gas port formed therein at a location below the primary inhalation valve assembly and wherein in at least one operating state, a second accessory is fluidly attached to the secondary gas port, wherein at least one of the first and second accessories deliveries aerosolized medication and the other of the first and second accessories delivers a gas to the patient, wherein the gas and aerosolized medication communicate with one another upstream of the primary inhalation valve assembly. 
     
     
         29 . The patient interface system of  claim 28 , wherein the second accessory comprises one of an MDI and a nebulizer device that delivers the aerosolized medication and the first accessory comprises a reservoir device that includes a connector for attachment to the conduit portion and at least one port for delivering the gas to the conduit portion and a chamber for storing the gas as well as the aerosolized medication when the primary inhalation valve assembly is closed during patient exhalation. 
     
     
         30 . The patient interface system of  claim 29 , wherein the first accessory comprises a dual chamber reservoir device having separate first and second holding chambers, wherein the first holding chamber is for storing the aerosolized medication and the second holding chamber is in fluid communication with an external gas port that is connected to a gas source that delivers the gas. 
     
     
         31 . The patient interface system of  claim 30 , wherein the external gas port includes an adjustable air entrainment window that is configured to alter a concentration of the gas by varying an amount of air that is entrained through the air entrainment window and mixes with the gas from the gas source. 
     
     
         32 . The patient interface system of  claim 31 , wherein the connector of the reservoir device has first and second legs, the first leg being in fluid communication with the first holding chamber and the second leg being in fluid communication with the second holding chamber, the second leg containing an inhalation valve assembly that is positioned above the external gas port to permit the gas therefrom to only flow to the conduit portion when the inhalation valve assembly in the second leg is open.