Humidification and humidifiers.
D000042:Absorption; D000336:Aerosols; D000388:Air / Q000032:analysis; D000769:Anesthesia, Inhalation / Q000295:instrumentation; D002245:Carbon Dioxide; D002648:Child; D005740:Gases / Q000032:analysis; D006801:Humans; D006813:Humidity; D007442:Intubation, Intratracheal; D012121:Respiration, Artificial / Q000295:instrumentation; D013696:Temperature; D014140:Tracheotomy / Q000295:instrumentation; D014465:Ultrasonics; D014867:Water / Q000032:analysis
D000336:Aerosols; D005740:Gases; D014867:Water; D002245:Carbon Dioxide