MICROWAVE TISSUE ABLATION PROBE WITH NON-METALLIC INTRODUCER SET

• US 20190321097A1
• Filed: 04/16/2019
• Published: 10/24/2019
• Est. Priority Date: 04/18/2018
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Cao, Hong, Harrison, Kent David, Ostroot, Timothy A.
• Granted Patent: US 11,304,755 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/04 for suturing wounds; Holders or packages for needles or suture materials suture materials A61L17/00
• CPC Class Codes: A61B 17/3403 Needle locating or guiding means guides for suture needles A61B17/0482; guiding or tracking by nuclear magnetic resonance G01R33/285
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2017/00902 transparent or translucent
• CPC Class Codes: A61B 2017/00951 adhesive
• CPC Class Codes: A61B 2017/306 holding by means of suction
• CPC Class Codes: A61B 2017/308 with suction cups
• CPC Class Codes: A61B 2017/3407 including a base for support on the body
• CPC Class Codes: A61B 2017/3492 against the outside of the body
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/1823 Generators therefor
• CPC Class Codes: A61B 2018/1869 with an instrument interstitially inserted into the body, e.g. needles
• CPC Class Codes: A61B 2018/1884 with non-uniform emissions
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2034/2053 Tracking an applied voltage gradient
• CPC Class Codes: A61B 2090/3925 ultrasonic
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 2090/3983 Reference marker arrangements for use with image guided surgery
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints
• CPC Class Codes: A61M 2025/0681 : Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2205/0283 : Electro-active polymers [EAP]

Abstract

An introducer set for a microwave ablation probe is disclosed. The introducer set includes a cannula that is at least partially transparent to microwave energy, and a stylet sized to be received by the lumen of the cannula. Other examples provide a microwave ablation system including a microwave ablation probe having a radiating portion and a cannula that is at least partially transparent to microwave energy. The radiating portion of the probe aligns with the transparent portion of the cannula when the probe is inserted into the cannula lumen. The technology provides a method including introducing a microwave ablation probe into the lumen of a cannula having a cannula body that is at least partially transparent to microwave energy, aligning the transparent portion of the cannula with the radiating portion of the probe, and causing microwave energy to be emitted from the radiating portion of the probe.

Claims

1. An introducer set for a microwave ablation probe having an elongated probe body and a radiating portion configured to emit microwave energy, the introducer set comprising:

a cannula comprising;

a cannula body defining a lumen sized to receive the elongated probe body of the microwave ablation probe,

wherein the cannula body comprises a non-metal portion located along the cannula body such that the non-metal portion overlaps the radiating portion of the microwave ablation probe when the microwave ablation probe is inserted into the cannula; and

a tissue-penetrating stylet sized to be received by the lumen of the cannula.

2. The introducer set of claim 1, wherein the stylet or the cannula further comprises at least one of a navigational sensor and a navigational marker.

3. The introducer set of claim 1 wherein the stylet further comprises a trocar at a tip of the stylet.

4. The introducer set of claim 1 wherein the cannula is less rigid than the stylet.

5. The introducer set of claim 1 wherein the cannula further comprises a blunt tip.

6. The introducer set of claim 1 wherein the cannula body is made entirely of a non-metal material.

7. The introducer set of claim 1 further comprising the microwave ablation probe, wherein the elongated probe body comprises a blunt tip.

8. The introducer set of claim 1 further comprising a fixation mechanism configured to fix a location of at least a part of the cannula within or to patient tissue, the fixation mechanism being one of:

a plurality of tines for anchoring the cannula to tissue;

a suture;

a suction pad; and

a self-adhesive pad comprising a connector.

9. A microwave ablation system comprising:

a microwave ablation probe having an elongated probe body and a radiating portion for emission of microwave energy at a distal portion of the probe body; and

a cannula having

a lumen, and

a window portion at a distal portion of the cannula, the window portion being at least partially transparent to microwave energy.

10. The microwave ablation system of claim 9, further comprising an introducer set comprising the cannula and a tissue-penetrating stylet sized to be received in the lumen of the cannula.

11. The microwave ablation system of claim 9 further comprising a fixation mechanism for fixing a location of the cannula within patient tissue.

12. The microwave ablation system of claim 9 wherein the window portion of the cannula overlaps the radiating portion of the microwave ablation probe at the distal portion of the probe body.

13. The microwave ablation system of claim 9, further comprising a connector configured to fix a position of the microwave ablation probe in relation to the cannula when the microwave ablation probe is inserted in the lumen of the cannula.

14. The microwave ablation system of claim 13, wherein the connector fixes the radiating portion of the microwave ablation probe in a position adjacent to the window portion of the cannula.

15. The microwave ablation system of claim 9 wherein the window portion comprises a non-metallic material.

16. The microwave ablation system of claim 15 wherein the non-metallic material is a dielectric polymer.

17. A microwave ablation method comprising:

inserting a microwave ablation probe into a lumen of a cannula;

aligning a radiating portion of the microwave ablation probe with a portion of the cannula that is at least partially transparent to microwave energy; and

causing microwave energy to be emitted from the radiating portion of the microwave ablation probe.

18. The microwave ablation method of claim 17 further comprising:

inserting a tissue-piercing stylet into the lumen of the cannula;

piercing a body of tissue with the stylet while the stylet is inserted in the cannula lumen;

fixing the cannula at a location in the body of tissue;

removing the stylet from the cannula lumen;

inserting the microwave ablation probe into the lumen of the cannula while the cannula is fixed at the location in the tissue;

ablating the tissue with microwave energy emitted from the radiating portion of the microwave ablation probe.

19. The microwave ablation method of claim 18 further comprising:

removing a biopsy sample of the tissue through the cannula lumen.

20. The microwave ablation method of claim 17 further comprising:

fixing the microwave ablation probe to the cannula using a connector.