Energy delivery systems and uses thereof

Patent metadata

Field	Value
Publication number	US-10952792-B2
Application number	US-201615335155-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Oct 26, 2015
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

Provided herein are devices, systems, 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, devices, systems, and methods are provided for delivering energy to difficult to access tissue regions (e.g. central or peripheral lung tissues), and/or reducing the amount of undesired heat given off during energy delivery.

First claim

We claim:

1. A device for delivering microwave energy to a distant region of a body, comprising:
a) a proximal end connectable to a microwave energy generator and a coolant source;
b) a distal end configured to generate ablative energy in a defined region surrounding said distal end;
c) an inner conductor, wherein said inner conductor is hollow;
d) a central region comprising
a non-conductive core surrounding the inner conductor such that an air channel is between the non-conductive core and the inner conductor, and
a spacer wound spirally around said inner conductor and in contact with said inner conductor and said non-conductive core, wherein said spacer comprises a monofilament tube, wherein the spacer is wound spirally around said inner conductor such that there is 1) no gap through the spacer, 2) no gap between the spacer and the inner conductor and 3) no gap between the spacer and the non-conductive core;

e) an outer conductor surrounding said non-conductive core; and
f) a coolant flow exchanger at the distal end configured to receive coolant from said inner conductor and return said coolant through said air channel.

2. The device of claim 1 , wherein said device is at least 20 centimeters long.

3. The device of claim 1 , further comprising a non-conductive jacket surrounding said outer conductor and a conductive sheath surrounding said non-conductive jacket, said conductive sheath forming a triaxial antenna with said outer conductor and said inner conductor.

4. The device of claim 1 , wherein said distal end comprises a conductive trocar.

5. The device of claim 4 , wherein said inner conductor is not connected to said trocar, wherein said inner conductor is capacitively coupled to said trocar.

6. The device of claim 1 , wherein said coolant flow exchanger comprises a cap having an open proximal end forming an opening within said cap and a closed distal end.

7. The device of claim 6 , wherein said inner conductor is inserted into said opening in said cap, wherein said opening in said cap comprises one or more channels that return coolant from said inner conductor out of said open proximal end of said cap and into said air channel.

8. The device of claim 1 , wherein said device has an outer diameter sized for endobronchial delivery of microwave energy to a central or peripheral lung nodule.

9. A system comprising the device of claim 1 and one or more of a delivery tube, a microwave generator, a coolant supply, a control computer, an imaging device, and a power and coolant interface.

10. The system of claim 9 , wherein said coolant supply comprises a pressurized gas.

11. The system of claim 10 , wherein said pressurized gas is CO 2 .

12. The system of claim 9 , wherein said coolant supply delivers coolant through said inner conductor of said device at zero to 1000 psi.

13. The system of claim 9 , wherein said interface comprises: a) a gas connector for connecting to a coolant source; b) a power connector for connecting to an electrical source; and c) an ablative power connector for connecting to a microwave generator.

14. A method of ablating a tissue comprising:
positioning the distal end of said device of claim 1 near a target tissue and applying ablative energy from said device.

15. The method of claim 14 , wherein said target tissue is in a lung.

16. The method of claim 15 , wherein said device is positioned endobronchially or transbronchially.

17. The method of claim 16 , wherein said target tissue is a central or peripheral lung nodule.

Assignees

• Neuwave Medical Inc

Inventors

• Thiel Matthew
• Thom Mark
• Schefelker Richard W
• Bissing Jeff
• Lazimy Yaniv
• Schaning Matt
• Anderson Dave

Classifications

• A61B2018/1892

  Details of electrical isolations of the antenna · CPC title

• A61B2018/1861

  with an instrument inserted into a body lumen or cavity, e.g. a catheter · CPC title

• A61B2018/183

  characterised by the type of antenna · CPC title

• A61B2018/1823

  Generators therefor · CPC title

• A61B2018/00577

  Ablation · CPC title