Dual action cryoprobe and methods of using the same
First Claim
1. A dual action ablation probe for necrosis of tissue by spray and contact comprising a tubular shaft for delivery of a cryogen, said shaft having a first end and a second end, an elongated hollow tip having a proximal end and a distal end and an interior space surrounded by a continuous sidewall, said proximal end of said tip connected to said first end of said tubular shaft, and said tip including at least one aperture whereby said cryogen lowers the temperature of said tip to ablate tissue by contact and said cryogen passing through said at least one aperture ablates tissue directly by spray.
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Accused Products
Abstract
Cryosurgery is performed with cryosurgical probe tips either contacting the tissue or by tips which deliver refrigerant onto the tissue. A dual action probe tip can be used to perform either operation separately or may be used for application of both methods. Various method steps define the procedures for use of the probe tips.
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Citations
29 Claims
- 1. A dual action ablation probe for necrosis of tissue by spray and contact comprising a tubular shaft for delivery of a cryogen, said shaft having a first end and a second end, an elongated hollow tip having a proximal end and a distal end and an interior space surrounded by a continuous sidewall, said proximal end of said tip connected to said first end of said tubular shaft, and said tip including at least one aperture whereby said cryogen lowers the temperature of said tip to ablate tissue by contact and said cryogen passing through said at least one aperture ablates tissue directly by spray.
- 9. A dual action ablation probe for necrosis of tissue comprising a tubular shaft for delivery of a cryogen, said shaft having a first end and a second end, an elongated hollow tip having a proximal end and a distal end and an interior space surrounded by a continuous sidewall, said proximal end of said tip connected to said first end of said tubular shaft, and said tip including at least one aperture wherein said shaft comprises at least two lumen, one lumen for cryogen supply to said tip and another lumen for cryogen exhaust from said tip.
- 20. A cryosurgical system for necrosis of tissue by hypothermia comprising at least one cryoprobe, said cryoprobe having a tubular shaft with a first end and a second end, said second end of said shaft connected to a console, said console containing valves for controlling flow of cryogenic fluid, a source of electrical power and electrical instruments for monitoring necrosis, said console adapted for connection to said source of cryogenic fluid through said valves, said first end of said shaft connected to the proximal end of a hollow elongated tip, wherein said shaft has a supply lumen and an exhaust lumen, the distal end of said tip having at least one exposed electrode for conducting an electric current, said tip having a plurality of exposed electrical sensors for monitoring electrical changes, said electrode and said sensors electrically connected to said console.
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26. A dual action ablation method of necrosis of tissue by freezing comprising the steps of
(A) providing an elongated tubular cryoprobe operatively connected at the proximal end to a source of cryogen, the distal end of said cryoprobe forming a cooling chamber, said cooling chamber having at least one aperture therethrough, (B) operatively placing said cryoprobe in tissue, (C) as a first action initiating flow of said cryogen to said cryoprobe to reduce the temperature of said cryoprobe and freeze a thin layer of tissue in contact with said cryoprobe, (D) as a second action continuing flow of said cryogen through said aperture as a spray onto said frozen tissue, (E) ceasing cryogen flow, (F) heating said cryoprobe and removing said cryoprobe from said tissue.
Specification