Thermal therapy catheter

A - Human Necessities – 61 – B

Patent

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Details

A61B 18/18 (2006.01) A61F 2/00 (2006.01) A61F 7/00 (2006.01) A61B 17/00 (2006.01) A61B 17/22 (2006.01) A61B 18/00 (2006.01)

Patent

CA 2365131

A thermal therapy catheter (28) includes a catheter shaft (32) having an outer surface (52) that is insertable into a body lumen. The catheter shaft (32) carries an energy-emitting element (74). A multi-lobe balloon (71) is positioned around the outer surface (52) of the catheter shaft (32) adjacent to the energy-emitting element (74), with opposing ends of the multi-lobe balloon (71) being sealingly connected to the catheter shaft (32) to form a chamber between the multi-lobe balloon (71) and the outer surface (52) of the catheter shaft (32). A fluid is circulated between the outer surface (52) of the catheter shaft (32) and the multi-lobe balloon (71) in a defined fluid flow path to firmly contact the wall of the body lumen and thereby conductively cool the body lumen tissue while thermally treating targeted tissue at a depth from the body lumen wall.

L'invention concerne un cathéter (28) destiné à la thérapie thermique, comprenant une tige (32) présentant une surface extérieure (52), laquelle tige de cathéter peut être introduite dans une lumière de corps. Ladite tige (32) de cathéter porte un élément émetteur d'énergie (74). Un ballonnet de distension multilobé (71) est placé autour de la surface extérieure (52) de la tige (32) à proximité de l'élément émetteur d'énergie (74). Les extrémités opposées dudit ballonnet de distension multilobé (71) sont reliées de façon étanche à la tige (32) de manière à former une enceinte entre le ballonnet de distension multilobé (71) et la surface extérieure (52) de ladite tige (32). Le fluide circule entre la surface extérieure (52) de la tige (32) du cathéter et le ballonnet de distension multilobé (71) selon un écoulement fluidique défini, de manière à entrer en contact avec la paroi de la lumière de corps et réchauffer par conduction le tissu de la lumière de corps tout en procédant, depuis la paroi de la lumière de corps, au traitement thermique de tissus cibles situés en profondeur.

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