Improved system and method for intraluminal imaging

Details Improved system and method for intraluminal imaging Improved system and method for intraluminal imaging

A - Human Necessities

61

B

A61B 8/12 (2006.01)

Patent

CA 2347628

An improved catheter system (10) having an ultrasonic imaging transducer coupled to a drive cable (34) disposed within a lumen (18) of a flexible tubular catheter body (12). An improvement including a reconfiguration of the ferrites (96, 98) in the hub assembly (24). such that the need for the gap between the ferrites is removed. A strain relief member (68) is provide to increase the strength of the electrical transmission lines to enable them to withstand the tensile forces caused by either flushing and/or pull-back operations. A device which allows the electrical transmission lines (72) to extend their length when placed in tension may also be employed to provide strain relief to the electrical transmission lines. Another improvement includes a counter-wound coil structure (60, 66), which may either expand or contract as the drive cable is being rotated to strengthen the drive cable. The distal tip of the catheter body may be redesigned to provide a lumen which allows for the release of flushing fluids through a distal port in the guidewire lumen.

L'invention porte sur un système de cathéter amélioré possédant un transducteur d'imagerie ultrasonique couplé à un câble de commande placé dans le lumen d'un corps de cathéter tubulaire flexible. L'amélioration consiste en une reconfiguration des ferrites dans l'ensemble moyeu de sorte qu'il n'y ait pas de vide entre les ferrites. Un élément de détente est prévu pour accroître la résistance des conduites de transmission électrique de façon à leur permettre de résister aux forces de tension dues aux opérations de rinçage et/ou de refoulement. Le dispositif, qui permet aux conduites de transmission électrique de se détendre lorsqu'elles sont sous tension, peut être utilisé pour assurer la détente. Une autre amélioration apportée à cette invention comprend une structure de bobine enroulée en sens opposé qui peut se dilater ou se contracter au moment où le câble de commande tourne pour resserrer le câble de transmission. L'extrémité distale du corps du cathéter peut être reconçue de façon à former un lumen qui permette l'évacuation des fluides de rinçage par un port distal du lumen à fil de guidage.

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