Combined motor drive and automated longitudinal position...

A - Human Necessities – 61 – B

Patent

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A61B 8/12 (2006.01)

Patent

CA 2331802

A vascular imaging system (20) with an automated longitudinal position translator includes a drive unit (22) with a single motor to provide for rotational, longitudinal translation of a drive cable (34) and distally mounted transducer (36) within a catheter assembly (24). The drive unit (22) includes a main body casing (42), and a pullback carriage (48) on which the main body casing slidingly engages. The drive cable is mechanically coupled to the motor, and an outer sheath of the catheter assembly is fixed to the pullback carriage via a rigid pullback arm (54). The imaging system can be made to operate in an automated longitudinal translation mode, wherein the main body casing of the drive unit is made to uniformly and longitudinally move relative to the pullback carriage by the drive unit motor, thus causing coincident longitudinal movement of the drive cable (and distally located transducer) relative to the outer guide sheath (28) of the catheter assembly.

L'invention concerne un système d'imagerie vasculaire (20) équipé d'un translateur de position longitudinale automatisé, qui comprend un mécanisme d'entraînement (22) à moteur simple permettant une translation longitudinale rotative d'un câble de commande (34), et un transducteur monté sur une partie distale interne d'un ensemble cathéter (24). Le mécanisme d'entraînement (22) comprend une enveloppe du corps principal (42) et un chariot de retrait (48) avec lequel l'enveloppe du corps principal effectue un contact de glissement. Le câble de commande est couplé mécaniquement au moteur et un manchon extérieur de l'ensemble cathéter est fixé au chariot de retrait par l'intermédiaire d'un bras de retrait rigide (54). Le système d'imagerie peut fonctionner en mode translation longitudinale automatisé dans lequel l'enveloppe du corps principal du mécanisme d'entraînement est mue par le moteur du mécanisme de manière à se déplacer uniformément sur un plan longitudinal relativement au chariot de retrait, ce qui provoque un mouvement longitudinal simultané du câble de commande (et du transducteur en position distale) relativement à l'enveloppe de guidage externe (28) de l'ensemble cathéter.

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