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Table 1 Patients' characteristics

From: Effect of a heated humidifier during continuous positive airway pressure delivered by a helmet

Patient Age (years) Sex Weight (kg) CPAP (cmH2O) PaO2/FiO2 (mmHg) PaCO2 (mmHg) pH RR (breaths/minute) Cause of ARF
1 51 Female 110 7.5 290 70 7.25 25 Acute exacerbation of COPD
2 78 Male 90 7.5 274 63 7.28 22 Acute exacerbation of COPD
3 63 Male 80 5 230 65 7.27 30 Acute exacerbation of COPD
4 77 Female 70 5 170 29 7.44 25 CHF
5 64 Male 95 5 216 37 7.38 25 Pneumonia
6 74 Female 75 5 170 38 7.45 24 Pneumonia
7 47 Male 90 10 155 34 7.51 25 Pneumonia
8 79 Female 70 10 142 39 7.45 20 CHF
9 72 Female 70 10 225 41 7.47 25 CHF
Mean ± SD 67.2 ± 11.8 4 males/5 females 83.3 ± 13.9 7.2 ± 2.3 209 ± 52 46.2 ± 15.3 7.39 ± 0.1 24.5 ± 2.7  
  1. ARF, acute respiratory failure; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; CPAP, continuous positive airway pressure; FiO2, inspired oxygen fraction; PaO2, partial arterial pressure of oxygen; RR, respiratory rate; SD, standard deviation.