Humidification during Mechanical Ventilation in the Adult Patient

Table 1

Humidity requirements for gas delivery at different anatomic sites in the airway.

Anatomic site	Nose or mouth	Hypopharynx	Midtrachea
Humidity requirements	50% relative humidity with AH of 10 mg/L at 22°C	95% RH with AH of 28 to 34 mg/L at 29 to 32°C	100% RH with AH of 36 to 40 mg/L at 31 to 35°C

Adapted from Cairo [12].