| 摘要 |
<p>A plastics clip (10) for performing sexual sterilization comprises two jaws (12, 14), each having a lining of silicone rubber, hinged to move from an open position to the closed position shown, in which a Fallopian tube (60) is occluded. A catch mechanism (40) biasses the jaws (12, 14) apart when the clip is open, by means of pressure from a resilient finger (22) on a cam profile (46) attached to the upper jaw (14). The finger (22) and underside of the cam profile (46) engage when the jaws reach their closed position, and lock the jaws closed. The upper jaw (14) has hinges (33) along its shank with the free end portion (32, 31) of the shank being biassed towards and pivotable away from the lower jaw (12). A thick portion (54) of the resilient lining (58) at the free end of the upper jaw impinges on the mesosalpinx (64) as the jaws are pivoted together, preventing escape of the tube before the clip is closed. The hinges (33) are configured such that the upper jaw (14) becomes straight and rigid when the jaws reach their closed position.</p> |
