Orotracheal intubation by direct laryngoscopy is somewhat contraindicated in a patient with partial transection of the trachea, because the procedure can cause complete tracheal transection and loss of the airway.

• 直接喉镜下气管插管对已行部分气管切除的患者相对禁忌，因为气管插管步骤导致气管全部横断及气道损伤。