초록 ▼

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 thr

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.

대표청구항 ▼

[ What is claimed is:] [21.] A device for removing material from inside a patient, comprising:an elongate tubular member having a suction port and an intake port, said suction port being spaced from said intake port, said suction port being connectable to a vacuum generator for applying suction to s

[ What is claimed is:] [21.] A device for removing material from inside a patient, comprising:an elongate tubular member having a suction port and an intake port, said suction port being spaced from said intake port, said suction port being connectable to a vacuum generator for applying suction to said tubular member;cutting means mounted to said tubular member for severing a portion of material drawn partially in through said intake port upon disposition of said tubular member through a skin surface so that said suction port is located outside the patient while said intake port is located in an internal organ of the patient;fluid feed means operatively connected to said tubular member for feeding a fluid to said tubular member to cooperate with applied suction to move the severed material out of said tubular member through said suction port, said fluid feed means being disposed eccentrically relative to said tubular member at least in a region about said intake port; andclosure means mounted to said tubular member for closing said intake port upon a severing of said portion of said material by said cutting means and prior to ejection of the severed portion of said material by the applied suction and said fluid feed means.