Method and associated device for removing material from body

Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue

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604 28, 604 93, 604158, 604280, 606171, 128753, 128772, A61B 1720

Patent

active

057307172

ABSTRACT:
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 connectable to a vacuum source and a pressurizable fluid reservoir. The tubular member also has a clot intake port positionable through a patient's skin inside a clogged vascular 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.

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