Biopsy forceps instrument having irrigation and aspiration capabilities
First Claim
1. A biopsy forceps instrument for retrieving tissue samples from a patient for use with an endoscope, comprising:
- a) a flexible tubular member having an irrigation conduit and an aspiration conduit;
b) a distal assembly having a hollow first jaw and a hollow movable second jaw, said movable second jaw being pivotable relative to said first jaw and coupled to at least one of said irrigation conduit and said aspiration conduit, and said first jaw being coupled to another of said at least one of said irrigation conduit and said aspiration conduit; and
c) a proximal actuator coupled to said distal assembly for moving said movable second jaw relative to said first jaw from an open position to a closed position to obtain a tissue sample from the patient, and wherein said movable second jaw and said first jaw are adapted such that when said movable second jaw and first jaw are in said closed position, said movable second jaw and first jaw form a substantially closed fluid passage between said irrigation conduit and said aspiration conduit so that the aspiration conduit can retrieve the tissue sample from the distal assembly with irrigation fluid provided by the irrigation conduit.
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Accused Products
Abstract
A biopsy forceps instrument is provided having a proximal actuation handle, a flexible multi-lumen tubular member, at least one control member extending through a lumen, an irrigation means, an aspiration means, and a distal assembly. The proximal actuation handle includes a shaft and a spool slidably mounted on the shaft. The actuation handle is coupled to the proximal ends of both the flexible tubular member and the control member. Lumens of the tubular member form irrigation and aspiration conduits. The distal assembly includes a hollow jaw cup coupled to the aspiration conduit and a hollow movable jaw coupled adjacent the irrigation conduit. The movable jaw is coupled to the control member, such that actuation of the actuation handle moves the movable jaw relative to the jaw cup. Moving the hollow jaws into a closed position provides a substantially fluidtight coupling between the irrigation and aspiration conduits. The actuation handle is also provided with an assembly to control irrigation to and aspiration from the distal assembly. A proximal sample chamber having a removable screen is provided for filtering tissue samples aspirated from the distal assembly. The jaws are activated to cut a tissue sample and the irrigation and aspiration means are activated to move the sample into the sample chamber for retrieving the sample without removing the instrument from a patient.
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Citations
29 Claims
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1. A biopsy forceps instrument for retrieving tissue samples from a patient for use with an endoscope, comprising:
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a) a flexible tubular member having an irrigation conduit and an aspiration conduit; b) a distal assembly having a hollow first jaw and a hollow movable second jaw, said movable second jaw being pivotable relative to said first jaw and coupled to at least one of said irrigation conduit and said aspiration conduit, and said first jaw being coupled to another of said at least one of said irrigation conduit and said aspiration conduit; and c) a proximal actuator coupled to said distal assembly for moving said movable second jaw relative to said first jaw from an open position to a closed position to obtain a tissue sample from the patient, and wherein said movable second jaw and said first jaw are adapted such that when said movable second jaw and first jaw are in said closed position, said movable second jaw and first jaw form a substantially closed fluid passage between said irrigation conduit and said aspiration conduit so that the aspiration conduit can retrieve the tissue sample from the distal assembly with irrigation fluid provided by the irrigation conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 29)
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25. A biopsy forceps instrument, comprising:
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a) a flexible tubular member having proximal and distal ends; b) at least one control member extending through said tubular member; c) a first jaw cup coupled to said distal end of said tubular member and having top surface formed as a blunt lip; d) a movable second jaw cup movable relative to said first jaw cup and having a sharp cutting surface; and e) a proximal actuator coupled to said at least one control member for moving said at least one control member relative to said tubular member, and thereby moving said second jaw cup relative to said first jaw cup from an open position to a closed position; wherein in said closed position said sharp cutting surface of said movable second jaw cup abuts said blunt lip of said first jaw cup. - View Dependent Claims (26, 27, 28)
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Specification