It was reported that during usage: the patient supine, shoulder pads, exposed area, anterior portion from two horizontal refers to the edge of thyroid cartilage to operating a long, ca.4 cm incision expose thyroid gland, the thyroid, exposed the trachea front fascia, separation of tracheal front fascia, exposed the trachea, with 5 syringe needle puncture pumping back to confirm, tracheal incision 3-4 trachea ring, open the trachea incision, no.7 disposable tube was inserted, the tube core was pulled out, and the air bag could not be inflated when the tube was fixed.
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