Dilation catheter and method of treatment therewith

A - Human Necessities – 61 – M

Patent

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Details

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

Patent

CA 2164839

A catheter for insertion into a bodily conduit, especially an artery. The catheter comprises a shaft (26) having at least one lumen (24) for delivery of a fluid inflation media and a double balloon (12) including an array (20) of a plurality of inflatable secondary chambers (22) radially disposed in a cylindrical stray around an inflatable primary chamber (16). Each of the secondary chambers (22) shares a common wall (38) with adjacent secondary chambers (22) and a common wall (14) with the primary chamber (16). The secondary chambers (22) are inflated by an array of channels (32) which are separated from each other by webs (40). One or more of the secondary chambers (22) may be in communication with a pressure transducer for measurement of the resistance of, e.g., a stenosis to dilation by the balloon (12). Alternately, a triple balloon (60) has inner secondary chambers (22a) and outer secondary chambers (22b). Also alternately, one or more of the secondary chambers (22) may be adapted to dispense medication. A method for treating a constricted bodily conduit using the catheter is also disclosed.

Un cathéter insérable dans un conduit du corps, spécialement une artère comprend un tube (26) avec au moins une lumière (24) de transmission d'un milieu fluide de gonflage et un double ballon (12) qui comprend une rangée (20) de plusieurs chambres secondaires gonflables (22) radialement situées en une rangée cylindrique autour d'une chambre primaire gonflable (16). Chaque chambre secondaire (22) partage une paroi commune (38) avec des chambres secondaires adjacentes (22) et une paroi commune (14) avec la chambre primaire (16). Les chambres secondaires (22) sont gonflées par une rangée de canaux (32) mutuellement séparés par des bandes (40). Une ou plusieurs chambres secondaires (22) peuvent communiquer avec un transducteur de pression qui mesure la résistance à la dilatation d'une sténose, par exemple, au moyen du ballon (12). Alternativement, un ballon triple (60) comprend des chambres secondaires internes (22a) et des chambres secondaires externes (22b). Dans un autre mode de réalisation, une ou plusieurs chambres secondaires (22) peuvent servir à administrer des médicaments. L'invention concerne également un procédé de traitement d'un conduit serré du corps au moyen du cathéter.

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