Patent ID: 7568483

Claim:
A patient interface assembly comprising: (a) a shell having a first shell opening and a second shell opening; (b) a seal comprising: (1) a first end portion coupled to the second shell opening, and (2) a second end portion adapted to contact a face of a patient; and (c) a mask attachment coupled to the first shell opening such that the mask attachment, the seal, and the shell define a unitary structure adapted to be assembled to a patient circuit and is fully supported on the mask, the mask attachment comprising: (1) a mask connection section having a first mask connection section end coupled to the first shell opening and a second mask connection section end, (2) an airway adapter section adapted for use in measuring a respiratory variable, wherein the airway adapter section includes a first airway adapter section end coupled to the second connection section end and a second adapter section end, and wherein the airway adapter section further comprises a gas measurement site comprising an infrared-transparent portion, a window including an infrared-transparent portion, or both, and (3) a breathing system connection section having a first breathing system connection section end coupled to the second airway adapter section end and a second breathing system connection section end adapted to be coupled to a patient circuit.