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Table 2 Maximal inspiratory and expiratory static pressures at different lung volumes for the female subjects.

From: Maximum static inspiratory and expiratory pressures with different lung volumes

Expiratory Pressure Inspiratory Pressure
Volume (%VC) Positive Pressure (cmH2O) Pe/Pmax Volume (%VC) Negative Pressure (cmH2O) Pi/Pmax
8.9 ± 0.7 38.7 ± 25.0 0.5864 12.1 ± 0.9 65.9 ± 31.6 0.9985
18.4 ± 1.0 44.2 ± 25.9 0.6697 22.5 ± 1.3 65.0 ± 31.6 0.9848
27.6 ± 1.3 53.4 ± 30.7 0.8091 33.0 ± 1.8 59.6 ± 32.0 0.9030
37.3 ± 1.5 53.7 ± 28.8 0.8136 43.3 ± 2.0 55.0 ± 32.0 0.8333
46.8 ± 1.9 53.3 ± 28.9 0.8076 53.5 ± 2.2 53.0 ± 32.9 0.8030
56.2 ± 2.2 55.4 ± 29.6 0.8394 63.8 ± 2.6 47.6 ± 28.3 0.7212
65.7 ± 2.6 57.3 ± 33.2 0.8682 73.6 ± 2.6 42.3 ± 28.6 0.6409
74.7 ± 3.2 61.7 ± 38.5 0.9398 83.1 ± 2.7 34.2 ± 27.4 0.5182
84.4 ± 3.2 61.2 ± 39.0 0.9273 92.6 ± 2.4 28.0 ± 29.0 0.4242
  1. Volumes are expressed in percent of vital capacity at ambient pressure. All values are shown with standard deviations. Pmax for females was determined to be 66 cmH2O.