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US 2016/0106497 A1Published application
Tissue extraction devices and methods
AssigneeIogyn, Inc.
InventorsAaron Germain, Kyle Klein, Michael D. Walker, Benedek Orczy-Timko, Balazs Lesko
Life of this patent
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Abstract
A tissue cutting device has an outer sleeve with a distal window and an inner cutting sleeve which moves past the window to cut tissue. The inner cutting sleeve has a lumen which may have a larger proximal diameter than distal diameter. A perimeter of the window may comprise a dielectric material. A distal edge of the inner sleeve may be displaced inwardly.
Claims20
A method of resecting tissue, comprising:
- advancing a tissue resecting device to a treatment site, the tissue resecting device comprising:
- an outer sleeve including a tissue-receiving window opening into a lumen of the outer sleeve, the outer sleeve including a return electrode;
- and
- an inner sleeve positioned in the lumen of the outer sleeve, the inner sleeve including an active electrode;
- longitudinally reciprocating the inner sleeve relative to the outer sleeve such that the active electrode repeatedly moves across the tissue-receiving window from a proximal position to a distal position and back to the proximal position from the distal position;
- applying an RF current between the active electrode and the return electrode as the active electrode moves across the tissue-receiving window from the proximal position to the distal position;
- and
- terminating the RF current between the active electrode and the return electrode as the active electrode moves across the tissue-receiving window from the distal position to the proximal position.
5 more elements
A method of resecting tissue, comprising:
- advancing a tissue resecting device to a treatment site, the tissue resecting device comprising:
- an outer sleeve including a tissue-receiving window opening into a lumen of the outer sleeve;
- and
- an inner sleeve positioned in the lumen of the outer sleeve;
- wherein the inner sleeve includes a first electrode having a first polarity and the outer sleeve includes a second electrode having a second polarity opposite the first polarity;
- longitudinally reciprocating the inner sleeve relative to the outer sleeve such that the first electrode repeatedly moves across the tissue-receiving window in a distal direction during a forward stroke and in a proximal direction during a retracting stroke;
- applying an RF current between the first electrode and the second electrode during at least a portion of the forward stroke;
- and
- terminating the RF current between the first electrode and the second electrode during at least a portion of the retracting stroke.
6 more elements
A system for resecting tissue, comprising:
- a tissue resecting device comprising:
- an outer sleeve including a tissue-receiving window opening into a lumen of the outer sleeve;
- and
- an inner sleeve positioned in the lumen of the outer sleeve;
- wherein the inner sleeve includes a first electrode having a first polarity and the outer sleeve includes a second electrode having a second polarity opposite the first polarity;
- wherein the inner sleeve is configured to longitudinally reciprocate relative to the outer sleeve such that the first electrode repeatedly moves across the tissue-receiving window in a distal direction during a forward stroke and in a proximal direction during a retracting stroke;
- a controller configured to applying RF current between the first electrode and the second electrode during at least a portion of the forward stroke, and terminate the RF current between the first electrode and the second electrode during at least a portion of the retracting stroke.
4 more elements
Dependencies are inferred from the claim text.