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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2016 May 24;64(3):681–689. doi: 10.1109/TBME.2016.2572678

Fig. 1.

Fig. 1

(a) Percentage of recruited lung vs. mean tracheal pressure. Symbols are computed from the experimental data of Kaczka et al. [13], as the ratio healthy to injured dynamic elastance multiplied by 100%. Solid line is the linear regression for the four data points, with horizontal dashed lines denoting the imposed upper and lower limits of recruitment. Thus the model assumes that 7.6% of the lung is recruited at a mean tracheal pressure of 0 cm H2O, while 100% of the lung is recruited at about 28 cm H2O. (b) Distribution of acinar critical opening / closing pressures (Pcrit,n), expressed as the fraction of total acini in the model. This distribution is computed as the slope (i.e., derivative) of the function in (a).