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

World Journal of Nursing Research | Vol 4, Issue 1

Figure 4

Procedure for measuring air leakage rate; <b>A</b> shows the setup for measuring air leakage rate from a mask during simulated exhalation using a facial model in a laboratory setting. The mask-fitting tester MT-05U was used for the measurements. A particle generator maintained a constant particle concentration in the room, and exhaled air was simulated using a nebulizer. <b>B</b> is a photograph illustrating the exhalation process, in which simulated exhaled air is released through tubes positioned within the nasal and oral cavities of the facial model.

Figure 4. Procedure for measuring air leakage rate; A shows the setup for measuring air leakage rate from a mask during simulated exhalation using a facial model in a laboratory setting. The mask-fitting tester MT-05U was used for the measurements. A particle generator maintained a constant particle concentration in the room, and exhaled air was simulated using a nebulizer. B is a photograph illustrating the exhalation process, in which simulated exhaled air is released through tubes positioned within the nasal and oral cavities of the facial model.