Gas evacuating patient interface

A patient interface for use in delivering a flow of a breathing gas to an airway of a patient, the patient interface comprising:

• (a) a coupling conduit structured to receive the flow of breathing gas from a delivery conduit;
• (b) an inner mask comprising:
• an inner faceplate having an inlet port defined therethrough, the inlet port having a first portion of the coupling conduit received therein such that the inner faceplate, and thus the inner mask is coupled to the coupling conduit, and
• an inner cushion coupled to, and extending rearward generally from, a periphery of the inner faceplate, the inner cushion having an inner sealing portion that is structured to sealingly engage the face of the patient about the mouth and nares of the patient;
• and
• (c) an outer mask comprising:
• an outer faceplate having a primary port defined therethrough, the primary port having a second portion of the coupling conduit, further inward on the coupling portion than the first portion, received therein such that the outer faceplate, and thus the outer mask is coupled to the coupling conduit, and a vacuum port defined through the outer faceplate, and
• an outer cushion coupled to, and extending rearward generally from, a periphery of the outer faceplate, the outer cushion having an outer sealing portion that is structured to sealingly engage the face of the patient completely around, and outward from, the inner sealing portion of the inner mask,
• wherein the inner faceplate and the inner cushion define a positive pressure cavity that is structured to receive and convey the flow of breathing gas from the coupling conduit to the airway of the patient, wherein the outer faceplate and the outer cushion define a negative pressure cavity encompassing the inner mask, wherein the vacuum port is structured to be coupled to a vacuum source that is structured to create a negative pressure in the negative pressure cavity, and wherein the negative pressure cavity is sized and configured to receive gases expelled and/or leaked from the positive pressure cavity of the inner mask.

A patient interface for use in delivering a flow of a breathing gas to an airway of a patient, the patient interface comprising:

• (a) a coupling conduit structured to receive the flow of breathing gas from a delivery conduit;
• (b) an inner mask comprising:
• (1) an inner faceplate having:
• a front side,
• a rear side disposed opposite the front side, and
• an inlet port defined through the inner faceplate, the inlet port having a first portion of the coupling conduit received therein such that the inner faceplate, and thus the inner mask is coupled to the coupling conduit;
• and
• (2) an inner cushion extending rearward generally from a periphery of the inner faceplate, the inner cushion having:
• an inward curving inner sealing portion that is structured to sealingly engage the face of the patient about the mouth and nares of the patient, and
• an inner wall portion that is coupled to the inner faceplate and extends between the inner faceplate and the inner sealing portion;
• and
• (c) an outer mask comprising:
• (1) an outer faceplate having:
• a front side,
• a rear side disposed opposite the front side,
• a primary port defined through the outer faceplate, the primary port having a second portion of the coupling conduit, further inward on the coupling portion than the first portion, received therein such that the outer faceplate, and thus the outer mask is coupled to the coupling conduit, and
• a vacuum port defined through the outer faceplate;
• and
• (2) an outer cushion extending rearward generally from a periphery of the outer faceplate, the outer cushion having:
• an outward curving outer sealing portion that is structured to sealingly engage the face of the patient completely around, and outward from, the inner sealing portion of the inner mask, and
• an outer wall portion that is coupled to the outer faceplate and extends between the outer faceplate and the outer sealing portion,
• wherein the inner faceplate and the inner cushion define a positive pressure cavity that is structured to receive and convey the flow of breathing gas from the coupling conduit to the airway of the patient,
• wherein the outer faceplate and the outer cushion define a negative pressure cavity encompassing the inner mask, wherein the vacuum port is structured to be coupled to a vacuum source that is structured to create a negative pressure in the negative pressure cavity, and wherein the negative pressure cavity is sized and configured to receive gases expelled and/or leaked from the positive pressure cavity of the inner mask.