Comparison of Rates of Air Leakage Due to Differences in Face Shape and Mask Size

Table 1.

Comparison of the size (mm, mm²) of the mask andfacial surface gap areas in relation to facial shape and mask size usingcomputer graphics

Right cheek
(㎜)
Left cheek
(㎜)
Chin
(㎜)
Approximate Triangle on the Right Side of the Nose (㎜2) Approximate Triangle on the Left Side of the Nose (㎜2)

Small face _S-size mask 7.9 14.2 8.6 21.2 20.0
Small face _M-size mask 7.9 14.2 8.6 20.3 22.4
Medium face _S-size mask 14.0 13.5 2.0 22.8 20.3
Medium face _M-size mask 14.6 15.0 3.1 21.5 21.1
Large face _S-size mask 10.6 7.5 3.2 22.2 20.2
Large face _M-size mask 14.3 13.9 5.8 20.2 20.5