Electrosurgical cutting devices
First Claim
1. An electrosurgical cutting device comprising:
- a substantially cylindrical body having a first end and a second end, the first end defining a peripheral cutting edge defining a closed loop, the substantially cylindrically body further comprises at least one cross-bar disposed within an interior of the substantially cylindrical body; and
a plurality of struts extending longitudinally from the second end of the substantially cylindrical body and configured for mating with a delivery device to form a gap between the electrosurgical cutting device and the delivery device.
2 Assignments
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Accused Products
Abstract
A cutting device for tissue separation includes a cutting edge using electrical energy such as RF power that is coupled to, but thermally insulated from, a catheter in an elongated medical device. Thermal insulation between a ring-type cutting device and the catheter is provided by a gap, slots within the ring, and/or slanted slots within the ring. In one embodiment, tissue separation occurs by rotation of a ring-type electrically-powered cutting edge having internal cross-bar elements. In an alternate embodiment, tissue separation occurs by longitudinal movement of an offset electrically-powered cutting edge that is pressed against tissue by an inflatable balloon. In a further alternate embodiment, a cutting edge is coupled longitudinally to a catheter, is provided electrical energy by wired connection to the braided catheter, but is thermally isolated from the catheter.
569 Citations
14 Claims
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1. An electrosurgical cutting device comprising:
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a substantially cylindrical body having a first end and a second end, the first end defining a peripheral cutting edge defining a closed loop, the substantially cylindrically body further comprises at least one cross-bar disposed within an interior of the substantially cylindrical body; and a plurality of struts extending longitudinally from the second end of the substantially cylindrical body and configured for mating with a delivery device to form a gap between the electrosurgical cutting device and the delivery device. - View Dependent Claims (2, 3, 4)
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5. A medical device comprising:
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a catheter having a distal end and a proximal end; an electrosurgical cutting device attached to the distal end of the catheter, the electrosurgical cutting device comprising; a substantially cylindrical body having a first end and a second end, the first end defining a peripheral cutting edge defining a closed loop, the substantially cylindrical body comprising one or more cross-bars disposed within an interior of the substantially cylindrical body, a plurality of struts extending longitudinally from the second end of the substantially cylindrical body to attach the electrosurgical cutting device to the distal end of the catheter so as to form a gap between the electrosurgical cutting device and the catheter; and an electrical conductor extending from the proximal end of the catheter to the distal end of the catheter for delivering electrical energy to the electrosurgical cutting device. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A medical device comprising:
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a catheter having a distal end and a proximal end; an electrosurgical cutting device attached to the distal end of the catheter, the electrosurgical cutting device comprising; a substantially cylindrical body having a first end and a second end, the first end defining a peripheral cutting edge defining a closed loop, a plurality of struts extending longitudinally from the second end of the substantially cylindrical body to attach the electrosurgical cutting device to the distal end of the catheter so as to form a gap between the electrosurgical cutting device and the catheter; and an electrical conductor extending from the proximal end of the catheter to the distal end of the catheter for delivering electrical energy to the electrosurgical cutting device, wherein the substantially cylindrical body comprises one or more slots disposed between the first end and the second end.
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14. A medical device comprising:
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a catheter having a distal end and a proximal end; an electrosurgical cutting device attached to the distal end of the catheter, the electrosurgical cutting device comprising; a substantially cylindrical body having a first end and a second end, the first end defining a peripheral cutting edge defining a closed loop, a plurality of struts extending longitudinally from the second end of the substantially cylindrical body to attach the electrosurgical cutting device to the distal end of the catheter so as to form a gap between the electrosurgical cutting device and the catheter; and an electrical conductor extending from the proximal end of the catheter to the distal end of the catheter for delivering electrical energy to the electrosurgical cutting device, wherein the substantially cylindrical body comprises one or more slanted slots.
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Specification