System and method for controlling electrosurgical snares
First Claim
1. An electrosurgical instrument comprising:
- a tubular sheath having proximal and distal ends;
a snare loop coupled to the distal end of the tubular sheath, the snare loop configured to encircle tissue; and
a feedback sensor operatively coupled to the tubular sheath and configured to provide feedback to a generator, the feedback sensor including;
a position sensor configured to measure a position of the snare loop, the position sensor including a potentiometer; and
a pressure sensor configured to measure pressure exerted by the snare loop on the encircled tissue.
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Accused Products
Abstract
A system and method for controlling electrosurgical snares are disclosed. The system includes an electrosurgical instrument having an elongate tubular sheath having proximal and distal ends, the sheath having a longitudinal axis defined therethrough and a shaft having proximal and distal ends. The shaft extends through and is axially movable relative to the sheath. A snare loop is provided at the distal end of the shaft and is configured for encircling tissue. Movement of the shaft relative to the tubular sheath changes the diameter of the exposed snare loop. A feedback sensor operatively connected to the elongated tubular sheath which determines at least one condition of the snare loop, and an electrosurgical generator provides electrosurgical energy to the electrosurgical snare instrument. The generator is configured to receive feedback measurements from the electrosurgical snare instrument and to adjust electrosurgical energy as a function of the measurements.
823 Citations
19 Claims
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1. An electrosurgical instrument comprising:
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a tubular sheath having proximal and distal ends; a snare loop coupled to the distal end of the tubular sheath, the snare loop configured to encircle tissue; and a feedback sensor operatively coupled to the tubular sheath and configured to provide feedback to a generator, the feedback sensor including; a position sensor configured to measure a position of the snare loop, the position sensor including a potentiometer; and a pressure sensor configured to measure pressure exerted by the snare loop on the encircled tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for performing electrosurgical procedures, the method comprising the steps of
inserting an electrosurgical instrument into a body cavity, the instrument including: -
a tubular sheath having proximal and distal ends; and a snare loop disposed at the distal end of the tubular sheath; positioning the snare loop to encircle a portion of the tissue; collecting feedback indicative of at least one condition of the snare loop through a feedback sensor operatively coupled to the tubular sheath; transmitting the feedback to an electrosurgical generator that provides electrosurgical energy; and adjusting electrosurgical energy and the diameter of the snare loop as a function of the feedback. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification