Skip to main content

Table 3 Temperature and humidity of the medical gas with and without the heated humidifier in patients with acute respiratory failure

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

  Temperature (°C) Absolute humidity (mgH2O/l) Relative humidity (%)
CPAPVENT with HH 32.4 ± 1.4a,c 34.1 ± 2.8a,b,c 98.1 ± 1.8a,c
CPAPVENT without HH 29.5 ± 2.0a 18.4 ± 5.5a,b 61.4 ± 14.7a,b
CPAPLF with HH 32.3 ± 1.0a,c 33.9 ± 1.9a,c 98.0 ± 1.0a,c
CPAPLF without HH 28.5 ± 1.7a 11.4 ± 4.8a 40.4 ± 15.5c
CPAPHF with HH 29.4 ± 1.1c 24.2 ± 5.4c 82.3 ± 18.3c
CPAPHF without HH 27.4 ± 1.2 6.4 ± 1.8 24.6 ± 6.9
  1. aP < 0.05 versus CPAPHF; bP < 0.05 versus CPAPLF; cP < 0.05 versus each mode of CPAP without HH. CPAP, continuous positive airway pressure; CPAPVENT, ventilator CPAP; CPAPLF, continuous low-flow CPAP; CPAPHF, continuous high-flow CPAP; HH, heated humidifier.