ENERGY DELIVERY SYSTEMS AND USES THEREOF

• US 20130165915A1
• Filed: 12/21/2012
• Published: 06/27/2013
• Est. Priority Date: 12/21/2011
• Status: Active Grant

• Current Assignee: Neuwave Medical, Inc. (Johnson & Johnson)
• Original Assignee: Neuwave Medical, Inc. (Johnson & Johnson)
• Inventors: Brace, Christopher Lee, Schefelker, Richard W., Thiel, Matthew J., Thom, Mark
• Granted Patent: US 9,192,438 B2
• Time in Patent Office: Days
• US Class Current: 606/33
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/183 characterised by the type of antenna
• CPC Class Codes: A61B 2018/1838 Dipole antennas
• CPC Class Codes: A61B 2018/1869 with an instrument interstitially inserted into the body, e.g. needles
• CPC Class Codes: A61B 2018/1892 Details of electrical isolations of the antenna
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems
• CPC Class Codes: A61B 90/57 Accessory clamps

Abstract

The present invention relates to comprehensive systems, devices and methods for delivering energy to tissue for a wide variety of applications, including medical procedures (e.g., tissue ablation, resection, cautery, vascular thrombosis, treatment of cardiac arrhythmias and dysrhythmias, electrosurgery, tissue harvest, etc.). In certain embodiments, systems, devices, and methods are provided for treating a tissue region (e.g., a tumor) through application of energy.

Claims

1. An ablation antenna device comprising:

a) an antenna comprising an inner conductor; and

b) a conductive tip at a distal end of said antenna;

wherein said inner conductor is not physically coupled to said conductive tip.

2. The device of claim 1, wherein said inner conductor is capacitively-coupled to said conductive tip.

3. The device of claim 1, wherein said antenna comprises a conducive outer conductor surrounding at least a portion of said inner conductor.

4. The device of claim 3, wherein said antenna comprises a dielectric material between said inner and outer conductors.

5. The device of claim 1, wherein said antenna is a triaxial antenna.

6. The device of claim 1, wherein said conductive tip comprises a trocar.

7. The device of claim 1, wherein said inner conductor comprises a first region distal to a second region, said second region distal to a third region, wherein said third region is contained in a triaxial antenna, wherein said second region lacks an outer conductor of said triaxial antenna, and wherein said first region lacks an outer conductor and dielectric material so said triaxial antenna.

8. The device of claim 7, wherein said first region is adhered to and surrounded by a metal fitting.

9. The device of claim 8, wherein said metal fitting is a brass metal fitting.

10. The device of claim 8, wherein said metal fitting extends distally beyond the most distal end of said inner conductor.

11. The device of claim 8, wherein said metal filling abuts a dielectric material surrounding the inner conductor in the second region.

12. The device of claim 7, wherein said second region comprises a proximal portion containing dielectric material of said triaxial antenna and a distal portion lacking said dielectric material of said triaxial antenna.

13. The device of claim 12, wherein said distal portion of said second region comprises a non-conductive sleeve surrounding said inner conductor.

14. The device of claim 13, wherein said non-conductive sleeve comprises PTFE.

15. The device of claim 11, wherein said conductive tip is attached to an insulator, said insulator attached to a distal end of said metal fitting.

16. The device of claim 15, wherein said insulator comprises a ceramic insulator.

17. The device of claim 16, wherein said metal fitting, insulator, and conductive tip are positioned and dimensioned so as to generate a low impedance overlap to transfer energy to said conductive tip when energy is supplied to said inner conductor.

18. The device of claim 8, wherein said metal fitting is adhered to said inner conductor via an electrically conductive adhesive.

19. A system comprising the device of claim 1 and a power supply electrically connected to said device.

20. The system of claim 19, wherein said power supply generates microwave energy.

21. The system of claim 19, further comprising a coolant supply in fluid communication with said device.

22. The system of claim 21, wherein said coolant supply comprises carbon dioxide.

23. The system of claim 21, wherein said antenna has a plug that prevents coolant from flowing to said distal end of said antenna.

24. The system of claim 21, further comprising a control processor that regulates energy deliver from said power supply to said antenna and coolant delivery to said antenna.

25. The system of claim 19, further comprising one or more additional antennas.

26. A method of ablating a sample, comprising contacting a device of claim 1 with a sample and providing energy to said device.

27. The method 26, wherein said sample is a tissue sample.

28. The method 27, wherein said tissue sample comprises a tumor.