Tracheotomy and its problems.
D004630:Emergencies; D006801:Humans; D007431:Intraoperative Complications; D011183:Postoperative Complications; D012119:Respiration; D014135:Tracheal Stenosis / Q000209:etiology; D014138:Tracheoesophageal Fistula / Q000209:etiology; D014140:Tracheotomy / Q000009:adverse effects* / Q000379:methods