Devices that create a suction force at the tracheal end of an endotracheal tube, either through a large syringe or a compressible flexible bulb, may assist in identifying an endotracheal intubation.

• 通过一大注射器或可压缩的弹性容器在气管导管末端产生一吸引力的设备，可帮助鉴别气管内插管术。