Ablative material for use with tissue treatment device

• US 7,951,149 B2
• Filed: 10/17/2006
• Issued: 05/31/2011
• Est. Priority Date: 10/17/2006
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Carlton, John D.
• Primary Examiner(s): Cohen; Lee S
• Assistant Examiner(s): GOOD, SAMANTHA M
• Application Number:
  US11/581,850
• Publication Number:
  US 20080091189A1
• Time in Patent Office: 1,687 Days
• Field of Search: 606 50- 52
• US Class Current: 606/51
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/146 Scissors

Abstract

An electrosurgical instrument for treating tissue includes a housing having at least one tissue treating member attached thereto. The tissue treating member includes an electrically conductive tissue contacting surface connected to a source of electrosurgical energy such that the tissue contacting surface is capable of conducting electrosurgical energy to tissue. An energy conductive, ablative material is disposed on the electrically conductive tissue contacting surface and is configured to at least partially deplete during electrosurgical activation to reduce tissue adhesion.

Claims

1. An electrode assembly for use with an electrosurgical instrument, the electrode assembly comprising:

a pair of opposing first and second jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;

each jaw member including an electrically conductive tissue contacting surface, each of the tissue contacting surfaces adapted to connect to a source of electrosurgical energy such that the tissue contacting surfaces are capable of conducting electrosurgical energy through tissue held therebetween;

at least one of the tissue contacting surfaces of one of the jaw members including an energy conductive, ablative material disposed thereon, the energy conductive, ablative material configured to at least partially deplete during electrosurgical activation to reduce tissue adhesion; and

a sensor adapted to monitor a depletion rate of the energy conductive, ablative material and configured to relay information relating to the depletion rate to the source of electrosurgical energy.

2. An electrode assembly according to claim 1 wherein the energy conductive, ablative material is applied to the at least one of the tissue contacting surfaces prior to electrosurgical application in the form of at least one of a gel and liquid material.

3. An electrode assembly according to claim 1 wherein the energy conductive, ablative material is sterilizeable for a pre-determined number of sterilization cycles.

4. An electrode assembly according to claim 1 wherein the energy conductive, ablative material is selected from the group consisting of fiberglass material impregnated with phenolic resin and silica powder, combinations of phenolic resin, polyamide and silica powder;

silicone elastomer, rayon-based carbon material and ceramic-forming polymer.

5. A system for sealing tissue, comprising:

a pair of opposing first and second jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;

each jaw member including an electrically conductive tissue contacting surface, at least one of the tissue contacting surfaces adapted to connect to a source of electrosurgical energy such that the tissue contacting surfaces are capable of conducting electrosurgical energy through tissue held therebetween to effect a tissue seal;

at least one of the tissue contacting surfaces of one of the jaw members including an energy conductive, ablative material disposed thereon, the energy conductive, ablative material configured to at least partially burn off during electrosurgical activation to reduce tissue adhesion;

a sensor adapted to monitor a depletion rate of the energy conductive, ablative material and configured to relay information relating to the depletion rate to the source of electrosurgical energy; and

wherein at least one electrical property of the at least one electrically conductive surface is monitored to control energy delivery during electrosurgical activation.

6. An electrode assembly according to claim 5 wherein the at least one electrical property of the electrically conductive surface includes at least one of impedance, current and voltage.

7. An electrode assembly according to claim 5 wherein the energy conductive, ablative material is selected from the group consisting of fiberglass material impregnated with phenolic resin and silica powder, combinations of phenolic resin, polyamide and silica powder;

silicone elastomer, rayon-based carbon material and ceramic-forming polymer.

8. The system according to claim 5 further including a source of electrosurgical energy, the source of electrosurgical energy includes at least one of an audible and visual indicator configured to alert a user when the sensor relays information relating to the depletion rate that falls within a predefined threshold.

9. The system according to claim 5 further including a source of electrosurgical energy, the source of electrosurgical energy configured to measure the changes in electrical properties of the at least one tissue contacting surface corresponding to the amount of energy conductive, ablative material depleted over time and modify the electrosurgical energy delivery based thereon to maintain proper energy delivery during electrosurgery.

10. A system for sealing tissue, comprising:

a pair of opposing first and second jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;

each jaw member including an electrically conductive tissue contacting surface, each of the tissue contacting surfaces adapted to connect to a source of electrosurgical energy such that the tissue contacting surfaces are capable of conducting electrosurgical energy through tissue held therebetween;

at least one of the tissue contacting surfaces of one of the jaw members including an energy conductive, ablative material disposed thereon, the energy conductive, ablative material being configured to at least partially deplete during electrosurgical activation to reduce tissue adhesion;

a sensor adapted to connect to the electrosurgical energy source and configured to relay information relating to a depletion rate to the electrosurgical energy source; and

an indicator configured to alert a user when the relayed information from the sensor relating to the depletion rate falls within a predefined threshold.

11. A system for sealing tissue, comprising:

a pair of opposing first and second jaw members being movable relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween;

a source of electrosurgical energy;

each jaw member including an electrically conductive tissue contacting surface, each of the tissue contacting surfaces connected to the source of electrosurgical energy such that the tissue contacting surfaces are capable of conducting electrosurgical energy through tissue held therebetween; and

at least one of the tissue contacting surfaces of one of the jaw members including an energy conductive, ablative material disposed thereon, the energy conductive, ablative material configured to at least partially deplete during electrosurgical activation to reduce tissue adhesion, the energy conductive, ablative material is sterilizeable for a pre-determined number of sterilization cycles,

wherein the source of electrosurgical energy measures the changes in electrical properties of the at least one electrically conductive surface corresponding to the amount of energy conductive, ablative material depleted over time and modifies the electrosurgical energy delivery based thereon to maintain proper energy delivery during electrosurgery.

12. An electrode assembly according to claim 11 further comprising a sensor adapted to connect to the electrosurgical energy source and configured to relay information relating to a depletion rate to the source of electrosurgical energy.