Catheter with limited longitudinal extension

Details Catheter with limited longitudinal extension Catheter with limited longitudinal extension

A - Human Necessities

61

M

A61M 25/00 (2006.01)

Patent

CA 2518582

A catheter includes a tube formed of plastic, a helical spring coil formed of metal and a ribbon which is longitudinally substantially non~-extendable. The coil is coaxially disposed within the tube and substantially coextensive longitudinally with the tube. The ribbon is disposed within the coil, proximal ends of the ribbon and the coil being secured together, and the ribbon distal end being secured to the coil body at a predetermined point of the coil body adjacent but substantially proximally spaced from the coil distal end. The ribbon precludes substantial longitudinal extension of the coil body intermediate the coil proximal end and the predetermined point, thereby to limit longitudinal extension and increase the pull strength of the catheter.

L'invention concerne un cathéter, qui comprend un tube en plastique, un enroulement d'un ressort hélicoïdal en métal, et un ruban dont la capacité d'extension longitudinale est sensiblement limitée. L'enroulement est disposé coaxialement à l'intérieur du tube dont il est sensiblement coextensif dans le sens longitudinal. Le ruban est disposé à l'intérieur de l'enroulement et les extrémités proximales du ruban et de l'enroulement sont fixées ensemble. L'extrémité distale du ruban est fixée au corps de l'enroulement, à un point préétabli du corps de l'enroulement adjacent à mais espacé de façon sensiblement proximale de l'extrémité distale de l'enroulement. Le ruban empêche une extension sensiblement longitudinale du corps de l'enroulement entre l'extrémité proximale de l'enroulement et ledit point préétabli, ce qui limite l'extension longitudinale et augmente la force de traction du cathéter.

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