Ablation devices utilizing exothermic chemical reactions, system including same, and methods of ablating tissue using same

Patent metadata

Field	Value
Publication number	US-9526557-B2
Application number	US-201414242019-A
Country	US
Kind code	B2
Filing date	Apr 1, 2014
Priority date	Aug 23, 2010
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

An ablation device includes a handle assembly including a distal end and a probe extending distally from the distal end of the handle assembly. The probe includes a heat-transfer portion and at least one fluid-flow path in fluid communication with the heat-transfer portion. The handle assembly includes at least one fluid reservoir in fluid communication with the at least one fluid-flow path and at least one apparatus configured to cause fluid flow between the at least one fluid reservoir and the heat-transfer portion. The probe is configured to apply thermal energy released by an exothermic chemical reaction that occurs when fluid from the at least one fluid reservoir is caused to flow to the heat-transfer portion.

First claim

What is claimed is:

1. A method for ablating tissue, the method comprising:
positioning an ablation device adjacent tissue to be treated, the ablation device including:
a probe including a heat-transfer portion in communication with at least one of a first fluid-flow path and a second fluid-flow path, the first fluid-flow path in communication with a first fluid reservoir, the second fluid-flow path in communication with a second fluid reservoir, and the heat-transfer portion in fluid communication with a third fluid reservoir,

contacting a first fluid, from within the first fluid reservoir, with a second fluid, from within the second fluid reservoir, to generate an exothermic reaction;
receiving a product of the exothermic reaction in the heat-transfer portion;
delivering thermal energy released from the exothermic reaction to the tissue to be treated; and
receiving the product of the exothermic reaction in the third fluid reservoir.

2. The method of claim 1 , further comprising expelling the first fluid from the first fluid reservoir, through the first fluid-flow path, and into the heat-transfer portion.

3. The method of claim 2 , wherein expelling the first fluid includes actuating a first plunger associated with the first fluid reservoir.

4. The method of claim 3 , further comprising generating an electric signal with a controller unit, the electric signal controlling actuation of the first plunger.

5. The method of claim 1 , further comprising expelling the second fluid from the second fluid reservoir, through the second fluid-flow path, and into the heat-transfer portion.

6. The method of claim 5 , wherein expelling the second fluid includes actuating a second plunger associated with the second fluid reservoir.

7. The method of claim 1 , further comprising engaging a mechanical coupling to actuate a first plunger to expel the first fluid from the first fluid reservoir and a second plunger to expel the second fluid from the second fluid reservoir.

8. The method of claim 1 , further comprising expelling a coolant fluid from a coolant fluid reservoir and through a proximal portion of the probe after delivering thermal energy to the tissue to be treated.

9. A method for ablating tissue, the method comprising:
positioning an ablation device adjacent tissue to be treated, the ablation device including:
a controller unit; and
a probe operably coupled to the controller unit and including a heat-transfer portion in fluid communication with at least one of a first fluid-flow path or a second fluid-flow path, the first fluid-flow path in communication with a first fluid reservoir, the second fluid-flow path in communication with a second fluid reservoir, and the heat-transfer portion in fluid communication with a third fluid reservoir;

depressing a user-operable switch electrically coupled to the controller unit to expel a first fluid from the first fluid reservoir to contact a second fluid in the heat-transfer portion, thereby generating an exothermic chemical reaction; and
delivering thermal energy released by the exothermic chemical reaction to the tissue to be treated.

10. The method of claim 9 , wherein depressing the user-operable switch generates an electric signal from the controller unit to control an operation of at least one actuator.

11. The method of claim 9 , further comprising expelling a coolant fluid from a coolant fluid reservoir and through a proximal portion of the probe after delivering thermal energy to the tissue to be treated.

12. The method of claim 9 , further comprising energizing the controller unit with a self-contained power source.

13. The method of claim 12 , further comprising providing a signal indication of a condition of the self-contained power source to a user.

14. The method of claim 9 , further comprising monitoring a fluid flow of the first fluid expelled from the first fluid reservoir to the heat-transfer portion using a fluid-flow monitoring system.

15. The method of claim 14 , further comprising regulating the fluid flow using the fluid-flow monitoring system.

16. The method of claim 15 , further comprising monitoring a temperature of the heat-transfer portion using a temperature sensor in communication with the controller unit.

17. The method of claim 16 , further comprising maintaining the temperature of the heat-transfer portion within a desired temperature range using the fluid-flow monitoring system.

18. The method of claim 17 , wherein maintaining the temperature of the heat-transfer portion includes decreasing the fluid flow when the temperature of the heat-transfer portion is below the desired temperature range and increasing the fluid flow when the heat-transfer portion is above the desired temperature range.

Assignees

• Covidien Lp

Inventors

• Brannan Joseph D

Classifications

• A61B2018/00577

  Ablation · CPC title

• A61B2018/068

  none of the reactants being oxygen · CPC title

• A61B18/06 Primary

  caused by chemical reaction {, e.g. moxaburners} · CPC title

• A61B2018/046

  in liquid form · CPC title

• A61B2018/00023

  closed, i.e. without wound contact by the fluid · CPC title