Polymeric implements for torque transmission

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/00 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2212808

Implements, particularly medical instruments, formed at least in part of elongated polymer members, exhibit high torque fidelity after processing with tension, heat, and twisting. The processing orients the polymer in generally helical paths so that torque imposed at the proximal end can be transmitted to the distal end without substantial whipping, even if the implement follows a long and tortuous pathway. Applications include a medical guide wire (2) with stiff portion (14), transition portion (16) and flexible portion (18), a catheter (140) and driveshaft.

Des instruments et en particulier des instruments médicaux constitués au moins en partie d'éléments polymères allongés, permettent une excellente transmission du couple, après avoir subi une tension, un chauffage et une torsion. Ce traitement provoque une orientation du polymère dans une direction sensiblement hélicoïdale, de sorte que le couple imposé à l'extrémité proximale peut être transmis à l'extrémité distale sans que l'instrument ne s'entortille d'une manière significative, même quand il suit un chemin long et tortueux. Cet instrument peut servir comme fil de guidage médical (2) avec une portion raide (14), une portion de transition (16) et une portion flexible (16), comme cathéter (140) et comme instrument (170) pour des sphinctérotomies.

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