Catheter with flexible side port entry and method of making...

A - Human Necessities – 61 – M

Patent

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Details

A61M 25/10 (2006.01) A61M 25/01 (2006.01) A61M 29/02 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2119373

An improved balloon catheter (1) is disclosed which is comprised of two jacketed spring coils (20, 22) placed end-to-end and joined by a linking element (24) which contains a lumen communicating between the inflation lumens (30) formed by the two spring coils (20, 22). A side port entry (12) to a guidewire lumen (10), which extends through the distal coil (22) to the distal end (14) of the catheter (1), is located in the transition region (24) formed by the linking element. The linking element (24) may include two polyimide tubes (32) or may be a multilumen insert. The catheter (1) is stiffened by a core wire (26) which is bonded directly to the spring coils (20, 22). A catheter comprised of a single spring coil with a side port entry in the coil is also disclosed, and a method and apparatus for crimping the coil to create the entry.

L'invention se rapporte à un cathéter (1) à ballonnet amélioré, composé de deux ressorts à boudin (20, 22) pourvus d'une gaine et placés bout à bout, et réunis par un élement de raccordement (24) qui contient un passage communiquant entre les passages de dilatation (30) formés par les deux ressorts à boudin (20, 22). Un orifice d'entrée latéral (12) ménagé dans un passage (10) pour fil de guidage qui s'étend à travers le ressort distal (22) vers l'extrémité distale (14) du cathéter (1), est situé dans la région de transition (24) formée par l'élément de raccordement. Ce dernier (24) peut comprendre deux tubes de polyimide (32) ou peut être une pièce rapportée à plusieurs passages. Le cathéter (1) est renforcé par un fil central (26) qui est directement fixé aux ressorts à boudin (20, 22). Un cathéter composé d'un ressort à boudin unique, avec un orifice d'entrée latéral ménagé dans le ressort, est également décrit, ainsi qu'un procédé et un appareil servant à sertir le ressort pour produire l'orifice d'entrée.

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