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Table 2 Ventilator settings and gas exchange at baseline

From: Paradoxical response to chest wall loading predicts a favorable mechanical response to reduction in tidal volume or PEEP

Subject PaO2/FiO2 PaCO2 (mmHg) VT (mL/kg PBW) PEEP set (cmH2O) RR Ventilatory ratio
1 85 50.8 7 16 22 2.1
2 137.5 101 4.9 12 30 4.0
3 109.3 66.7 6 7.5 24 2.6
4 83 81.3 5.4 6 32 3.7
5 87 62.6 3.9 6 27 1.8
6 157.2 65.3 5.9 9 32 3.3
7 245 63.4 5.5 12 22 2.0
8 82.2 63.2 5.9 5 30 3.0
9 86.9 61.5 5.4 8 32 2.8
10 147 48.1 7 14 34 3.1
11 191.4 47.4 5.9 12 28 2.1
12 160 74.3 6.6 10 24 3.1
13 98.3 49 4.6 10 32 1.9
14 102.5 45 5.2 8 28 1.7
15 65.6 59 4.6 12 34 2.5
16 185.5 58.7 6.7 12 26 2.7
17 73.4 92.7 4.7 6 34 4.0
Mean 123.3 64.1 5.6 9.7 28.9 2.7
SD 50.7 15.7 0.9 3.2 4.2 0.7
  1. PaO2 Partial pressure of arterial oxygen, FiO2 Fraction of inspired oxygen, PaCO2 Partial pressure of arterial carbon dioxide, VT Tidal volume, PEEP Positive end-expiratory pressure, RR Respiratory rate, SD Standard deviation. Ventilatory ratio is defined as [minute ventilation (mL/min) x PaCO2 (mmHg)]/(predicted body weight × 100 × 37.5)