Method and associated device for removing material from body

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/22 (2006.01) A61B 10/00 (2006.01) A61M 1/00 (2006.01) A61B 17/00 (2006.01) A61B 17/34 (2006.01)

Patent

CA 2207502

A pull push device for removing a clot. The device includes an elongate tubular member having a suction port and an irrigation or fluid pressurization port respectively con-nectable to a vacuum source and a pressurizable fluid reser-voir. The tubular member also has a clot intake port positionable through a patient's skin inside a clogged vas-cular vessel. The vacuum source enables clot suction into the clot intake port for severing while liquid pressure supplies fluid for clot ejection and device clearance. A single piece rotating or reciprocating cutter and intake closure component is mounted inside the tubular member for closing the clot intake port upon each small vacuum assisted severing of clot mass by the cutting element. By simultaneously severing the clot and closing the intake port by the closure component, the device automatically converts from a suction to a pressure mode, thus ejecting any clot through the suction port. The ordered and continual suck, cut, push, pull tandem ejection system is aided by an automatic anticlogging mechanism which is operative when a sucked clot obstructs suction through the tubular member. This self-limiting feature closes off further suction and ends the process of clot intake. Only after window closure and clot ejection has occurred is vacuum restored to the intake port so that more clot may be sucked into the device for processing.

Dispositif à va-et-vient (10) utile pour éliminer un caillot. Le dispositif (10) comprend un élement tubulaire allongé (12) comportant un orifice de succion (14) et un orifice (18) d'irrigation ou de mise en pression du fluide pouvant être respectivement connectés à une source de vide (22) et à un réservoir de fluide pouvant être mis en pression. L'élément tubulaire est également pourvu d'un orifice d'aspiration (16) du caillot qui peut être positionné à travers la peau d'un patient à l'intérieur d'un vaisseau vasculaire bouché. La source de vide (22) permet d'aspirer le caillot dans l'orifice d'aspiration (16) du caillot pour le détacher alors que la pression du liquide permet l'envoie du fluide pour faire sortir le caillot et vider le dispositif. Un dispositif de coupe (28) d'un seul tenant rotatif ou à mouvement alternatif et un élément de fermeture (24) de l'orifice d'aspiration sont montés à l'intérieur de l'élément tubulaire pour fermet l'orifice d'aspiration du caillot à chaque fois que l'élément coupant assisté par le vide s'attaque par petits coups à la masse du caillot. La découpe du caillot et la fermeture simultanée de l'orifice d'aspiration (16) par l'élément de fermeture (24) permettent au dispositif de passer automatiquement d'un mode de succion à un mode de pression et par conséquent d'éjecter les caillots par l'orifice de succion (14).

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