Hybrid tubular guide wire for catheters

Details Hybrid tubular guide wire for catheters Hybrid tubular guide wire for catheters

A - Human Necessities

61

M

A61M 25/00 (2006.01) A01B 5/00 (2006.01) A61B 5/00 (2006.01) A61B 6/12 (2006.01) A61L 29/00 (2006.01) A61M 25/01 (2006.01) A61M 25/09 (2006.01)

Patent

CA 2255781

A hybrid tubular wire (320) includes first and second elongate tubular bodies (340, 344), fitted end to end, and about which a catheter may be threaded for guidance to a body target location in a vasculature passageway of a body. The first elongate body (340) has greater rotational stiffness than the second elongate body (344), which has greater lateral flexibility. Cuts (362) are formed either by saw cutting, laser cutting or etching at spaced apart locations along the length of the second elongate body (344) to increase its lateral flexibility. At least some of the cuts extend through the tubular body to the interior cavity to allow the escape of fluids flowing in the cavity.

Le guide métallique (320) tubulaire, hybride, selon la présente invention, comporte un premier et un second corps tubulaire allongé (340, 344), mis bout à bout, et sur lesquels il est possible d'enfiler un cathéter de façon à guider ce dernier vers un emplacement corporel cible dans un passage vasculaire. Ledit premier corps allongé (340) possède une rigidité de rotation supérieure à celle du second corps allongé (344) qui possède une flexibilité latérale supérieure à celle du premier corps. On pratique des entailles (362) soit par coupe à la scie, soit par coupe au laser, soit par attaque, en des emplacements espacés le long du second corps allongé (344) de manière à accroître sa flexibilité latérale. Certaines au moins de ces entailles traversent le corps tubulaire jusqu'à la cavité interne et permettent l'évacuation des fluides s'écoulant dans la cavité.

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