Instrument and method employing snare electrode windable about rotatable spool for minimally invasive electrosurgical resection
First Claim
1. A surgical instrument, comprising:
- a body having proximal and distal parts, said distal part including a passageway extending axially therethrough, said passageway having first and second ports;
with slots;
a snare electrode adapted to telescope in said passageway, said distal part having an outward surface electrically insulated from said snare electrode;
said snare electrode including first and second portions, said second portion being extendable from said second port for forming a loop sized to be placed over tissue to be removed from a patient;
a spool rotatably supported in said proximal part with port, said first portion of said snare electrode being windable about said spool, wherein a rotation of said spool in a winding direction causes retraction of said first portion of said snare electrode from said first port, thereby closing said loop to engage said tissue; and
an electrical connector connecting said snare electrode to be coupled to an electrical source, wherein an electrical current is passed from said electrical source to said loop to cauterize said tissue.
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Accused Products
Abstract
A surgical instrument includes a body, a snare electrode, a spool and an electrical connector. A distal part of the body includes a passageway extending axially therethrough. The snare electrode is adapted to telescope in the passageway. The distal part of the body has an outward surface electrically insulated from the snare electrode. A second portion of the snare electrode is extendable from a second port of the passageway for forming a loop sized to be placed over tissue (e.g., portion(s) of the uterus and/or kidney(s), spleen, pancreas, gallbladder, remnant from the liver, and/or vascular aneurysm) to be removed from a patient. The spool is rotatably supported in a proximal part of the body. A first portion of the snare electrode is windable about the spool. A rotation of the spool in a winding direction causes retraction of the first portion of the snare electrode from a first port of the passageway, thereby closing the loop to engage the tissue. The electrical connector is for allowing the snare electrode to be coupled to an electrical source. An electrical current is passed from the electrical source to the loop to cauterize the tissue.
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Citations
43 Claims
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1. A surgical instrument, comprising:
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a body having proximal and distal parts, said distal part including a passageway extending axially therethrough, said passageway having first and second ports;
with slots;
a snare electrode adapted to telescope in said passageway, said distal part having an outward surface electrically insulated from said snare electrode;
said snare electrode including first and second portions, said second portion being extendable from said second port for forming a loop sized to be placed over tissue to be removed from a patient;
a spool rotatably supported in said proximal part with port, said first portion of said snare electrode being windable about said spool, wherein a rotation of said spool in a winding direction causes retraction of said first portion of said snare electrode from said first port, thereby closing said loop to engage said tissue; and
an electrical connector connecting said snare electrode to be coupled to an electrical source, wherein an electrical current is passed from said electrical source to said loop to cauterize said tissue.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 32)
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21. A surgical instrument, comprising:
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a body having proximal and distal parts, said distal part including a passageway extending axially therethrough, said passageway having first and second ports;
a snare electrode adapted to telescope in said passageway, said distal part having an outward surface electrically insulated from said snare electrode;
said snare electrode including first and second portions, said second portion being extendable from said second port for forming a loop sized to be placed over a resection portion of a uterus, wherein said resection portion is to be is removed from a patient;
a spool rotatably supported in said proximal part, said first portion of said snare electrode being windable about said spool, wherein a rotation of said spool in a winding direction causes retraction of said first portion of said snare electrode from said first port, thereby closing said loop to engage said resection portion of said uterus; and
an electrical connector connecting said snare electrode to be coupled to an electrical source, wherein an electrical current is passed from said electrical source to said loop to cauterize said resection portion of said uterus. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38)
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39. A method of effecting electrosurgical resection, said method comprising:
- selecting a snare electrode having first and second portions;
selecting a body having proximal and distal parts, said distal part including a passageway extending axially therethrough, said passageway having first and second ports;
telescoping said snare electrode in said passageway and extending said second portion of said snare electrode from said second port in order to form a loop, said first portion of said snare electrode being wound about a spool rotatably supported in said proximal part;
sizing said loop for placement around a resection portion of an organ, wherein said resection portion is to be removed from a patient;
rotating said spool in a winding direction to retract said first portion of said snare electrode away from said first port, to close said loop and engage said resection portion of said organ; and
passing an electrical current from an electrical source to said loop to cauterize said resection portion of said organ. - View Dependent Claims (40, 41, 42, 43)
- selecting a snare electrode having first and second portions;
Specification