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Table 3 Changes in hemodynamics, arterial blood gas values, and respiratory rates

From: Aggressive treatment with noninvasive ventilation for mild acute hypoxemic respiratory failure after cardiovascular surgery: Retrospective observational study

  Group Baseline Within 1 h Within 2 h Within 6 h Discontinuation of NIV or reintubation
Heart rate (bpm) Successful 89 ± 15 87 ± 17 86 ± 15 86 ± 17 84 ± 15 *2
  Reintubation 97 ± 19 96 ± 17 99 ± 12 95 ± 11 92 ± 10
Mean arterial blood Successful 76 ± 15 77 ± 13 75 ± 13 77 ± 12 78 ± 11
pressure (mmHg) Reintubation 77 ± 18 74 ± 8 74 ± 4 74 ± 8 74 ± 12
pH Successful 7.44 ± 0.05 7.39 ± 0.17 7.44 ± 0.04 7.43 ± 0.12 7.45 ± 0.05
  Reintubation 7.40 ± 0.13 7.44 ± 0.05 7.40 ± 0.16 7.45 ± 0.07 7.40 ± 0.15
PaO2/FIO2 (mmHg) Successful 143 ± 44 †1 206 ± 79 *2, †1 218 ± 66 *2, †1 231 ± 72 *2, †2 244 ± 67 *2, †2
  Reintubation 103 ± 28 134 ± 79 139 ± 96 129 ± 58 103 ± 41
PaCO2 (mmHg) Successful 37 ± 5 37 ± 5 38 ± 5 38 ± 4 38 ± 5
  Reintubation 45 ± 14 48 ± 22 47 ± 20 41 ± 4 48 ± 20
Respiratory rate Successful 25 ± 6 23 ± 5 *2 22 ± 5 *2 21 ± 4 *2 22 ± 4 *2
(breaths/min) Reintubation 25 ± 4 26 ± 6 26 ± 7 23 ± 10 23 ± 10
  1. Data are shown as the mean ± SD.
  2. NIV, noninvasive ventilation.
  3. *1 P < 0.05, *2 P < 0.01 vs. baseline.
  4. †1 P < 0.05, †2 P < 0.01 between the two groups.