Process of manufacturing an aneurysm clip

Details Process of manufacturing an aneurysm clip Process of manufacturing an aneurysm clip

A - Human Necessities

61

B

A61B 17/12 (2006.01) B21F 35/02 (2006.01)

Patent

CA 2174226

A process for manufacturing an aneurysm clip (10) having a coil spring (22), a first arm (26) ending in a first clamping jaw, and a second arm (34) ending in a second clamping jaw (40). The method includes: (a) providing a cylindrical starting rod (1) of titanium or titanium alloy; (b) cold drawing the rod to reduce its diameter and increase its strength; (c) cutting the rod to form a single resilient member (12); (d) winding the member about a mandrel to form the coil spring while incorporating the deflection of the arms into the clamping force of the clip; (e) shaping the member into two end sections (16) forming the clamping jaws and two connecting sections (18) forming connecting elements for the jaws; (f) coining the two end sections of the member a temperature between 900 and 1000 degrees F; and (g) bending the clamping jaws into a position assuring that the clamping jaws are parallel when clamped onto tissue (70).

Procédé de fabrication d'un clip anévrysmal (10) muni d'un ressort hélicoïdal (22), d'un premier bras (26) se terminant par une première mâchoire de serrage, et d'un deuxième bras (34) se terminant par une deuxième mâchoire de serrage (40). Ce procédé consiste à: (a) prendre une tige de départ cylindrique (1) de titane ou d'alliage de titane; (b) tréfiler la tige afin d'en réduire le diamètre et d'en augmenter la résistance; (c) couper la tige pour former un élément élastique unique (12); (d) enrouler l'élément autour d'un mandrin pour former le ressort hélicoïdal tout en intégrant la déviation des bras dans la force de serrage du clip; (e) profiler l'élément sous forme de deux parties terminales (16) constituant les mâchoires de serrage et de deux parties intermédiaires (18) reliant les mâchoires; (f) forger par matriçage les deux parties terminales de l'élément à une température comprise entre 900 et 1000 ~F; et (g) recourber les parties mâchoires en une position permettant d'assurer qu'elles seront parallèles lorsqu'elles enserreront des tissus (70).

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