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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0650869 (1991-02-05) |
| 발명자 / 주소 |
|
| 인용정보 | 피인용 횟수 : 328 인용 특허 : 0 |
A surgical fastening clip of a shape memory alloy which applies a first clamping force to a site when the alloy is in its martensitic condition and a second clamping force to the site when the alloy heats due to surrounding tissue such that the alloy transforms to its austenitic condition. The secon
A surgical fastening clip of a shape memory alloy which applies a first clamping force to a site when the alloy is in its martensitic condition and a second clamping force to the site when the alloy heats due to surrounding tissue such that the alloy transforms to its austenitic condition. The second clamping force is greater than the first clamping force and prevents the clip from slipping or falling off the clamped site due to shrinkage or movement of the site. For instance, the site could be a blood vessel which becomes thinner due to the compressive force of the clip and shrinks, but the clip maintains a clamping force on the blood vessel due to the shape memory effect of the alloy. A method of using a surgical fastening clip formed of a shape memory alloy by placing opposed legs of the clip around a site, deforming the legs to a closed configuration and heating the clip by the natural surroundings to cause further closing of the legs and thereby increasing the clamping force. A method of making a clip formed of a shape memory alloy by deforming the clip to a closed configuration, heating to the austenitic state, setting the memory of the alloy, cooling to the martensitic state, and deforming the clip to an open configuration.
A surgical fastening clip, comprising: a substantially U-shaped member of a shape memory alloy having a martensite transformation temperature below which the alloy transforms to its martensitic state and an austenite transformation temperature above which the alloy transforms to its austenitic state
A surgical fastening clip, comprising: a substantially U-shaped member of a shape memory alloy having a martensite transformation temperature below which the alloy transforms to its martensitic state and an austenite transformation temperature above which the alloy transforms to its austenitic state; the clip being deformable in its martensitic state from a closed configuration to an open configuration and recovering to the closed configuration when heated to transform the alloy to its austenitic state; and the clip being in the open configuration and capable of being deformed to the closed configuration in its martensitic state so as to apply a first clamping force on an object and so as to apply a second clamping force on the object when the alloy is heated to transform it to its austenitic state, the second clamping force being greater than the first clamping force, the clip including first and second opposing legs joined together at one end thereof, the legs having free ends at the other end thereof, the clip including means for applying a clamping force in a longitudinal direction parallel to the first and second legs when the clip is in the closed configuration and the clip transforms to its austenitic state, the clamping force in the longitudinal direction being provided by shrinkage in the longitudinal direction of at least one of the legs of the clip when the clip transforms to its austenitic state.
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