The hazards of tracheostomy.
D002648:Child; D002675:Child, Preschool; D004646:Emphysema / Q000209:etiology; D006470:Hemorrhage / Q000209:etiology; D006801:Humans; D007817:Laryngeal Cartilages / Q000293:injuries; D008722:Methods; D012131:Respiratory Insufficiency / Q000601:surgery; D013312:Stress, Physiological; D014135:Tracheal Stenosis / Q000209:etiology; D014140:Tracheotomy / Q000009:adverse effects*; D014456:Ulcer