| 摘要 |
Laryngeal mask assembly 14 comprises diaphragm 26 carrying inflatable ring 22 , wherein both diaphragm 26 and inflatable ring 22 are covered by backing-plate 34 which prevents rearward deflection of inflatable ring 22 when in the deflated state and thus facilites insertion of the mask assembly 14 into the human hypopharynx. |
