The use of mechanical ventilators.
D000222:Adaptation, Physiological; D006801:Humans; D006813:Humidity; D007442:Intubation, Intratracheal; D011175:Positive-Pressure Respiration; D012121:Respiration, Artificial / Q000451:nursing*; D014140:Tracheotomy; D012122:Ventilators, Mechanical / Q000592:standards