Apparatuses and methods for ablation treatments including probes with handle heating

Patent metadata

Field	Value
Publication number	US-12564433-B2
Application number	US-202217819106-A
Country	US
Kind code	B2
Filing date	Aug 11, 2022
Priority date	Aug 11, 2022
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A probe for performing a cryoablation treatment that includes a handle with a heater configured to heat a fluid and a needle connected to the handle and extending therefrom to a distal end. The needle includes a pathway configured to move the fluid from the handle toward the distal end to heat the needle.

First claim

What is claimed is:

1 . A system for performing a cryoablation treatment comprising:
a probe comprising:
a handle comprising an input conduit, an output conduit, and a heater, the heater positioned in thermal communication with the input conduit; and
a needle having an outer diameter of 1.2 mm or less and connected to the handle and extending therefrom to a distal end, the needle comprising a supply conduit fluidly coupled to the input conduit and a return path, the supply conduit and the return path defining a fluid pathway through the needle, the fluid pathway configured to move a fluid therethrough to alternatively cool and heat the needle; and
one or more ablation computing devices coupled to the probe, the one or more ablation computing devices configured to selectively heat and cool the needle; wherein: the one or more ablation computing devices are further configured to selectively activate the heater to heat the needle to multiple different predetermined temperature ranges; and each of the predetermined temperature ranges corresponds to a heating range configured to perform a thaw cycle, a cautery cycle, a track ablation cycle, and a coagulation cycle.

2 . The system of claim 1 , wherein the fluid pathway is configured to move a cryogen, and the probe is configured to alternatively cool the needle when the heater is not activated and to heat the needle when the heater is activated.

3 . The system of claim 1 , wherein the supply conduit is positioned inside a shell of the needle and the return pathway is defined by an outer surface of the supply conduit and an inner surface of the shell.

4 . The system of claim 3 , wherein the shell has an outer diameter of 1.0 mm or less.

5 . The system of claim 3 , wherein the handle further comprises an output conduit fluidly coupled to the return path.

6 . The system of claim 1 , wherein the handle encloses the heater and the needle has an outer diameter of 1.0 mm or less.

7 . The system of claim 1 , wherein the heater is positioned around the input conduit.

8 . The system of claim 1 , wherein the input conduit is positioned around the heater.

9 . The system of claim 1 , wherein the heater comprises a resistive heater.

10 . The system of claim 1 , wherein the heater comprises one of a magnetic heater and a fiber laser heater.

11 . The system of claim 1 , further comprising one or more measurement points positioned on the needle.

12 . The system of claim 11 , wherein the one or more measurement points comprise temperature sensors configured to determine a temperature of the needle.

13 . The system of claim 1 , wherein the one or more ablation computing devices are configured to activate the heater when a bleeding condition is detected.

14 . The system of claim 1 , wherein the one or more ablation computing devices are configured to activate the heater when the needle is being moved from a treatment position in a patient and to de-activate the heater when the needle has been moved a predetermined distance from the treatment position.

15 . A method comprising:
cooling the needle of the probe in the system of claim 1 to form ice at a target tissue; and heating the needle of the probe using the heater positioned in the handle of the probe.

16 . The method of claim 15 wherein the step of heating the needle of the probe comprises heating the fluid that moves through the handle to the distal end of the needle, the fluid in thermal communication with the heater in the handle of the probe.

17 . The method of claim 15 , wherein the step of cooling the needle comprises moving a cryogen from a cryogen source through the handle and toward the distal end of the needle.

18 . The method of claim 15 , further comprising:
obtaining measurement information regarding operating conditions of the probe; comparing measurement information to a treatment plan; and adjusting the operating conditions of the probe if the measurement information deviates from the treatment plan.

19 . The method of claim 15 , wherein the step of heating the needle comprises denaturing proteins in tissue proximate the needle to reduce a likelihood of contaminating healthy tissues.

20 . The method of claim 15 , wherein the step of heating the needle is performed after the step of cooling the needle in order to allow the needle to be removed from the ice.

21 . The method of claim 15 , wherein the step of heating the needle is performed to promote coagulation of blood when a bleeding condition is detected.

22 . The method of claim 15 , wherein the step of heating the needle is performed when the needle is moved from a first position to a second position.

23 . The method of claim 22 , wherein the step of heating the needle is initiated when the needle is positioned at an initial position at the target tissue, and the heating of the needle is automatically stopped when the needle is moved a predetermined distance.

Assignees

• Varian Med Sys Inc

Inventors

• Zhang Hongxuan
• Vallapureddy Vineel
• Medema Ryan Lee

Classifications

• A61B2018/0293

  using an instrument interstitially inserted into the body, e.g. needle · CPC title

• A61B2018/00589

  Coagulation · CPC title

• A61B2018/00863

  Fluid flow · CPC title

• A61B2018/00714

  Temperature · CPC title

• A61B2018/00595

  Cauterization · CPC title