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在麻醉、急救等领域广泛使用气管插管建立人工气道进行机械通气。现有气管插管在经口腔插入后必须置放牙垫，防止患者将插管咬闭，本文介绍作者研制的一种不用牙垫的新型气管插管。1结构新型气管插管由气囊、管身、外接口及套管（HMT）组成，除HMT外，其余部分与现用的气管插管
In the field of anesthesia, first aid and other widely used intubation to establish artificial airway for mechanical ventilation. After the existing tracheal intubation is inserted into the oral cavity, a dental pad must be placed to prevent the patient from biting off the intubation. This article describes a new type of endotracheal intubation that the author did not use. 1 Structure A new tracheal cannula consists of a balloon, a tube body, an outer joint and a cannula (HMT). Except HMT, the rest of the tracheal cannula is in line with the existing tracheal cannula.