Endoscopic extraction device having composite wire construction

Details Endoscopic extraction device having composite wire construction Endoscopic extraction device having composite wire construction

A - Human Necessities

61

B

A61B 17/22 (2006.01) A61B 17/50 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2110380

Disclosed herein is an endoscopic extraction device which retains its operative usefulness for longer periods of time, and therefore needs to be replaced less frequently, This extended instrument life is accomplished through the use of a composite wire construction, which includes an inner monofilament wire (I l) of nitinol material surrounded by six stranded stainless steel wires (12a-f). A wire construction in which a nitinol wire (21) is surrounded by five stranded stainless steel wires (22a-e) is also disclosed. After constructing a wire basket in the normal manner using this material, heat is applied to the formed basket in its preformed shape to set the memory characteristics of the inner nitinol core.

Dispositif d'extraction endoscopique qui demeure utile pendant de longues périodes et n'a donc pas besoin d'être remplacé aussi souvent. Cette durée de vie prolongée est rendue possible grâce à l'utilisation d'une construction métallique mixte, qui inclut un monofilament interne (I1) de nitinol entouré de six fils toronnés en acier inoxydable (12a-f). Une construction métallique dans laquelle un fil de nitinol (21) est entouré de cinq fils toronnés en acier inoxydable (22a-e) est également présentée. Après la construction d'un panier métallique de la manière habituelle, on chauffe le panier formé dans sa forme originale pour fixer les caractéristiques de la mémoire de forme du noyau interne du nitinol.

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