Complications of tracheostomy.
D004646:Emphysema / Q000209:etiology; D006470:Hemorrhage / Q000209:etiology; D006801:Humans; D008478:Mediastinal Emphysema / Q000209:etiology; D011030:Pneumothorax / Q000209:etiology; D011183:Postoperative Complications; D012189:Retrospective Studies; D014140:Tracheotomy / Q000009:adverse effects* / Q000401:mortality