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Table 2 Arterial blood gases and respiratory mechanics. Data are means (standard deviation) or medians (quartiles)

From: Thoracic fluid content: a novel parameter for predicting failed weaning from mechanical ventilation

  Failed weaning (n = 23) Successful weaning (n = 41) p value
P/F ratio 296.7 (75.4) 338 (87.4) 0.09
PaCO2 (mmHg) 34 (28,36) 31 (28.5, 35.5) 0.18
pH 7.47 (0.07) 7.45 (0.07) 0.66
HCO3 (mEq L−1) 26.4 (5.7) 23.7(4.6) 0.14
Lactate (mmol L−1) 1.3 (1, 1.8) 1.3 (0.9, 1.65) 0.69
RSBI 40 (29, 60) 40 (29.3, 56) 0.87
Minute ventilation (L min−1) 9.8 (2.7) 9.1 (2.4) 0.22
Compliance (dynes) 67 (45, 91) 62.8 (44.5, 60) 0.69
TFC (kΩ−1) 61 (26) 45 (14) 0.002*
  1. P/F ratio PaO2/fraction of inspired oxygen, TFC thoracic fluid content, RSBI rapid shallow breathing index
  2. *Denotes statistical significance