这些药物能改善声带的可视度，防止患者呕吐及吸入胃内容物，使插管更加便利。
These agents will improve your visualization of the vocal cords and prevent the patient from vomiting and aspirating gastric contents.
吸入物如同胃内容物一样由于化学刺激物的作用可引起炎症。
Aspirated material may also produce inflammation from chemical irritation, as with gastric contents.
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