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Table 4 Time course of arterial blood gases before, during and after fiberoptic bronchoscopy (FBO) in the noninvasive positive pressure ventilation (NPPV) group

From: Early fiberoptic bronchoscopy during non-invasive ventilation in patients with decompensated chronic obstructive pulmonary disease due to community-acquired-pneumonia

  pre-NPPV pre-FBO during FBO post-FBOa
pH, mean (SD) 7.27 (0.02) 7.29 (0.02) 7.29 (0.02) 7.37 (0.04)**
PaCO2 mmHg, mean (SD) 76 (7) 75 (8) 73 (7) 60 (3)**
PaO2/FiO2, mean (SD) 163 (60) 211 (39)** 203 (40)* 200 (70)**
SpO2, %, mean (SD) 79 (9) 93 (2)** 92 (3)** 92 (2)**
FiO2, mean (SD) 0.45 (10) 0.70 1.0 0.39 (12)
  1. a after 2 hours of NPPV.
  2. * P < 0.05 vs pre-NPPV.
  3. ** P < 0.05 vs pre-NPPV.
  4. FiO2, fraction of inspired oxygen; PaCO2, partial pressure of arterial carbon dioxide; PaO2, partial pressure of arterial oxygen; SD, standard deviation; SpO2, pulse oximetry.