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Table 1

From: Effect of noninvasive ventilation on pulmonary gas exchange in chronic obstructive pulmonary disease

  PH PCO2 PO2 Sat PAO2
Initial 7.26 ± 0.029 67.1 ± 5.9 50.0 ± 9.5 76.3 ± 12.2 65.9 ± 7.74
Final 7.38 ± 0.028 60.2 ± 5.4 85.8 ± 7.6 93.9 ± 4.7 164.1 ± 28.3
P value 0.000* 0.041* 0.000* 0.004* 0.000*
  1. *significant with improvement.