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US 6,235,023 B1Granted
Cell necrosis apparatus
AssigneeRita Medical Systems, Inc.
InventorsKee S. Lee, Daniel Balbierz
Life of this patent
Estimating the term…
Abstract
A cell necrosis apparatus includes an introducer with a distal end sufficiently sharp to penetrate tissue. An energy delivery device has a first set of RF electrodes, a second set of RF electrodes and a third RF electrode. Each of electrodes has a tissue piercing distal end and is positionable in the introducer as the introducer is advanced through tissue. The first and second sets of RF electrodes are deployable with curvature from the introducer. The third RF electrode is deployable from the introducer with less curvature than the first and second sets of RF electrodes. The second set of RF electrodes is deployable a greater distance from the introducer than the first set of RF electrodes.
Claims56
A cell necrosis apparatus, comprising:
- an introducer with a distal end sufficiently sharp to penetrate tissue;
- and
- an energy delivery device including a first set of RP electrodes and a second set of RF electrodes both having a tissue piercing distal end and positionable in the introducer as the introducer is advanced through tissue, the first and second sets of RF electrodes being deployable with curvature from the introducer, deployed portions of the electrodes of the first and second sets of electrodes being configured to create substantially the same geometric ablation shape at a first deployed position and a second deployed position.
A cell necrosis apparatus, comprising,
- an introducer with a distal end sufficiently sharp to penetrate tissue;
- and
- an energy delivery device including a first set of RF electrodes, a second set of RF electrodes and a third RF electrode all having a tissue piercing distal end and positionable in the introducer as the introducer is advanced through tissue, the first and second sets of RF electrodes being deployable with curvature from the introducer, the third RF electrode being deployable from the introducer with less curvature than the first and second sets of RF electrodes, each of a deployed portion of the electrodes of the first and second sets of electrodes and the third electrode being configured to increase in length as the first and second sets of electrodes and third of electrode are distally advanced from the introducer such that the first and second sets of electrodes and third electrode create substantially the same geometric ablation shape independent of distance deployed from the distal end of the introducer.
A cell necrosis apparatus, comprising:
- an introducer including a lumen and a distal end sufficiently sharp to penetrate tissue;
- an energy delivery device including a first RF electrode with a tissue piercing distal portion and a second RF electrode with a tissue piercing distal portion, the first and second RF electrodes being positionable in the introducer as the introducer is advanced through tissue and deployable with curvature from the introducer at a selected tissue site, each of a deployed portion of the first and second electrodes electrode being configured to increase in length as the first and second set electrodes are distally advanced from the introducer such that the first and second electrodes create substantially the same geometric ablation shape independent of distance deployed from the distal end of the introducer;
- a deployable member coupled to the first and second RF electrodes;
- and
- a first sensor coupled to the deployable member to advance through tissue with the deployable member towards the selected tissue site.
2 more elements
A cell necrosis apparatus, comprising:
- an introducer with a distal end sufficiently sharp to penetrate tissue;
- and an energy delivery device including a first set of RF electrodes and a second set of RF electrodes both having a tissue piercing distal end and positionable in the introducer as the introducer is advanced through tissue, the first and second sets of RF electrodes being deployable with curvature from the introducer, each of a deployed portion of the electrodes of the first and second sets of electrodes being configured to create substantially the same geometric ablation shape independent of distance deployed from the introducer.
A cell necrosis apparatus, comprising:
- an introducer with a distal end sufficiently sharp to penetrate tissue;
- and
- an energy delivery device including a first set and a second set of optical fibers both positionable in the introducer as the introducer is advanced through tissue, the first and second sets of optical fibers being deployable with curvature from the introducer, each of a deployed portion of the first and second sets of optical fibers being configured to create substantially the same geometric ablation shape independent of distance deployed from the introducer.
A cell necrosis apparatus, comprising:
- an introducer means with a distal end sufficiently sharp to penetrate tissue;
- and
- an energy delivery device means including a first set of electrode means and a second set of electrode means both having a tissue piercing distal end and positionable in the introducer means as the introducer means is advanced through tissue, the first and second set of electrodes means being deployable with curvature from the introducer means, each of a deployed portion of the electrodes of the first and second set of electrode means being configured to create substantially the same geometric ablation shape independent of distance deployed from the distal end of the introducer means.
Dependencies are inferred from the claim text.