Ultrasound imaging catheter with a cutting element

Details Ultrasound imaging catheter with a cutting element Ultrasound imaging catheter with a cutting element

A - Human Necessities

61

B

A61B 8/12 (2006.01) A61B 18/14 (2006.01) A61B 18/24 (2006.01) A61B 17/22 (2006.01) A61B 19/00 (2006.01) A61M 29/02 (2006.01)

Patent

CA 2225784

The invention features a catheter having a catheter body (12) of extended length for insertion within a body of a living being. The catheter also includes an ultrasound imaging device (20) disposed within a distal portion of the catheter body. The ultrasound imaging device generates electrical signals used by an ultrasound imaging system to display a real time image of tissue surrounding the distal portion of the catheter. The catheter further includes a cutting element (30a), e.g., an electrode wire or a laser fiber, having a proximal portion disposed within the catheter body. The catheter also includes a mechanism connected to the catheter body that causes the distal portion of the cutting element to extend from the catheter body. The distal portion of the cutting element generates energy in tissue with which it is brought in proximity to form a cut in the tissue. The ultrasound imaging device is positioned relative to the cutting element such that the real time image produced by the ultrasound imaging system can include the cutting element in relation to the tissue.

L'invention concerne un cathéter ayant un corps (12) allongé pour une insertion dans le corps d'un individu vivant. Le cathéter comprend également un dispositif d'iamgerie ultrasonique (20) disposé à l'intérieur de la portion distale du cathéter. Le dispositif d'imagerie ultrasonique génère des signaux electriques utilisés par un système d'imagerie ultrasonique pour afficher en temps réel l'image du tissu entourant la portion distale du cathéter. Le cathéter comporte, en outre, un élément coupant (30a), par exemple un fil métallique d'électrode ou une fibre laser ayant une portion proximale placée dans le corps du cathéter. Le cathéter comprend également un mécanisme relié au corps qui fait que la portion distale de l'élément coupant s'étend depuis le corps du cathéter. La portion distale de l'élément coupant génère de l'énergie dansle tissu qui est proche, pour le couper. Le dispositif d'imagerie ultrasonique est positionné par rapport à l'élément coupant pour que l'image en temps réel produite par le système d'imagerie ultrasonique puisse inclure l'élément coupant en train de couper le tissu.

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