nasal mask ventilation

摘要

A nasal respiratory mask (2) comes into contact with the face of a user to supply positive pressure gas respiratory to the user's nose, comprising at least one firmly secured part of the face (2b) which is firmly attached to the user's face; a fitting portion to the frame (2c) coupled with a frame (3) to fix the nasal mask (2) at a predetermined position; and an elastic connecting portion (2a) which elastically connects firmly attached part to the face (2b) with the fitting portion to the frame (2c), wherein the cross section formed by a plane perpendicular to the face of the part elastic connection (2a) is an arc-shaped C, characterized in that the cross section of the elastic connecting portion (2a) comprises at least a first arc (2f) which continues from the firmly secured part of the face (2b) , a second arc (2g) which continues from the fitting portion to the frame (2c) and a third arc (2h) directly or indirectly connecting the first arc (2f) with the second arc (2 g); the radius of the third arc (2h) is greater than the radius of the first arc (2f) and the radius of the second arc (2g); the part of the face side of the elastic connecting part (2a) is thicker than the side portion of the frame thereof; the facial side of the elastic connecting part (2a) is kept away from the side of the fitting portion to the frame thereof at a required distance even in the absence of positive pressure applied breathing.