Double-lumen laryngeal mask: The main features are the improvement of ventilation mask and the increase of drainage tube. After placement, two sealing cavities connected with each other are formed. One is the ventilation mask that connects the larynx seal with the ventilation tube, and the other is the sealing of the upper esophageal sphincter and the drainage tube at the front end of the ventilation mask. Compared with the common laryngeal mask, the insertion difficulty is similar, but the positive pressure ventilation is safer and more effective, and the incidence of aspiration is lower. At the same time, the suction tube can be placed through the drainage channel, which is easy to find when the position is incorrect. Therefore, its clinical application scope is wider, in addition to the limbs of the surface surgery, but also applicable to laparoscopic abdominal surgery.
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