Injection snare
First Claim
1. A surgical instrument assembly comprising:
- a body;
an actuator, said actuator slidably attached to said body for sliding movement on said body;
a catheter, said catheter attached to and extending through said body at a proximal end of said catheter;
an injection needle, said needle disposed within said catheter and having a proximal end connected to said actuator and a distal end containing a piercing tip, said needle movable within said catheter between a first position wherein said distal end of said needle extends beyond a distal end of said catheter and a second position wherein the distal end of said needle is retracted within said catheter; and
a snare, said snare attached to the distal end of said injection needle.
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Accused Products
Abstract
An injection snare is disclosed. One embodiment of the present invention includes an instrument body, an actuator slidably attached to the body, a catheter attached to and extending through the body at a proximal end of the catheter, an injection needle, and a snare. The injection needle is disposed within the catheter and has a proximal end connected to the actuator. A distal end of the injection needle contains a piercing tip. The injection needle is movable within the catheter between a first position wherein the distal end of the needle extends beyond the distal end of the catheter and a second position wherein the distal end of the needle is retracted within said catheter. The snare is attached to the distal end of the injection needle.
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Citations
25 Claims
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1. A surgical instrument assembly comprising:
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a body; an actuator, said actuator slidably attached to said body for sliding movement on said body; a catheter, said catheter attached to and extending through said body at a proximal end of said catheter; an injection needle, said needle disposed within said catheter and having a proximal end connected to said actuator and a distal end containing a piercing tip, said needle movable within said catheter between a first position wherein said distal end of said needle extends beyond a distal end of said catheter and a second position wherein the distal end of said needle is retracted within said catheter; and a snare, said snare attached to the distal end of said injection needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A surgical instrument assembly for use in tissue removal procedures, comprising:
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an endoscope assembly, said endoscope assembly including a working channel; an injection needle, said injection needle including a distal end containing a piercing tip and a proximal end; a snare, said snare attached to the distal end of said injection needle; and an actuator, said actuator connected to said injection needle at the proximal end of said needle for movement of said needle between a first position where the distal end of said needle extends beyond a distal end of said working channel and a second position where the distal end of said needle is retracted to a position proximal of said distal end of said working channel. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of removing tissue from a body of a patient comprising the steps of:
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inserting a distal end of a catheter into the body of the patient; extending an injection needle and a snare through the distal end of the catheter, said snare attached to a distal end of said injection needle; injecting a fluid into the tissue to be removed from the body; capturing the tissue to be removed by said snare; conducting an electrical current through said needle and into said snare; and cutting the tissue by said snare. - View Dependent Claims (20, 21)
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22. An apparatus for injecting fluid into tissue to be removed from a body and capturing the tissue to be removed, comprising:
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a catheter, said catheter including a distal end for insertion into a body; an injection needle, said injection needle disposed within said catheter and including a piercing tip at a distal end thereof; and a snare, said snare attached to said injection needle at the distal end thereof; wherein said injection needle is movable within said catheter between a first position where the distal end of said needle and said snare extend beyond the distal end of said catheter and a second position where the distal end of said needle and said snare are retracted within said distal end of said catheter. - View Dependent Claims (23, 24, 25)
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Specification