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Table 1 Patient characteristics and ventilator settings

From: Assessment of dead-space ventilation in patients with acute respiratory distress syndrome: a prospective observational study

  Post-cardiac surgery (n = 15) ARDS (n = 15)
Age, years 71 ± 11 56 ± 17
Gender, F/M 6/9 3/12
Weight, kg 80 ± 14 80 ± 21
Height, cm 172 ± 9 178 ± 10
Admission diagnosis 11 CABG 14 pneumonia
4 valve surgery 1 abdominal sepsis
Pulmonary comorbidities None 1 asthma
1 interstitial lung disease
1 lung cancer
PaO2/FiO2, mmHg 354 ± 76 153 ± 38
Aa-gradient, mmHg 108 ± 51 245 ± 74
Ventilation mode 15 PRVC 9 assisted ventilation
6 controlled ventilation
PEEP, cmH2O 5 [5–7] 12 [10–14]
Tidal volume, ml/kg PBW 8.3 ± 0.9 6.8 ± 1.2
Time on ventilator 1.8 ± 0.8 h 11.5 ± 11.4 days
  1. Aa-gradient alveolar-arterial oxygen concentration gradient, ARDS acute respiratory distress syndrome, CABG coronary artery bypass graft, FiO 2 fraction of inspired oxygen, PaO 2 partial pressure of oxygen in arterial blood, PBW predicted body weight, PEEP positive end expiratory pressure, PRVC pressure-regulated volume control
  2. Data are presented as mean ± SD or median [IQR]