| 摘要 |
A laryngeal mask airway device inserted in the pharynx of an unconscious patient to ventilate the lungs includes an airway tube and mask portion with cuff formation shaped to fit the actual and potential space surrounding the circumference of the inlet to the larynx. A piriform-fossa conduit is included in a cuff formation of such mask to facilitate insertion of orogastric tubes. Anatomically the piriform-fossa conduit travels around the laryngeal inlet through the piriform fossa to reach the upper esophagus. Structurally the piriform-fossa conduit travels through the lateral cuff formation with the inflatable cuff element. The distal orifice of the piriform-fossa conduit is on the outer perimeter of the cuff formation near the tip of the mask, does not intersect the medial line at the tip, and does not increase bulk in the distal cuff formation along the medial line. |
