FIGURE 5:
Compliance and projected closing pressure (Pclose) Calculation. a: Cross-sectional area of the patent airway in each slice and the facemask pressure during one representative occluded breath. b: Linear regression of data from the inhale portion (shaded area in a), from which the compliance (slope) and Pclose (x-intercept) values are calculated. Colors correspond to the slice locations in Figure 4. Note that slice 4 is the narrowest at baseline, whereas slice 1 is the most compliant and has the highest Pclose, suggesting that it is the more likely point of collapse.