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Electrode for radiofrequency tissue

A technology of electrodes and living tissues, applied in parts of surgical instruments, medical science, heating surgical instruments, etc., can solve problems such as difficult flow control device integration, bleeding, and reducing the cooling effect of pressurized saline solution, so as to achieve easy operation, The effect of bleeding minimization

Active Publication Date: 2009-11-18
RF MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are economic disadvantages due to the difficulty in incorporating a separate flow control device to the hollow electrode
In addition, the flow control device may become detached from the electrode when the electrode is removed from the body
Also, the casing may reduce the cooling effect of the pressurized saline solution
Also, due to the increased diameter of the entire electrode—that is, the thickness of the needle—when the electrode is inserted into the body, it can cause severe bleeding

Method used

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  • Electrode for radiofrequency tissue
  • Electrode for radiofrequency tissue
  • Electrode for radiofrequency tissue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0041] The experimental object is the liver of a cow, and the RF generator is a product of Valleylab. In these experiments, the saline solution discharge holes 22 were provided in the hollow electrodes 50 at intervals of 180° from each other. The experimental results of Embodiments 1-7 in which the size of the hole 22 was changed are shown in Tables 1-3 below.

[0042] Table 1

[0043] implementation plan

Hole radius (mm)

Number of holes

total circulation flow rate

Total hole area (mm 2 )

1

0.01

2

90cc / min

0.000628

2

0.0125

2

90cc / min

0.0009813

3

0.015

2

90cc / min

0.001413

4

0.0175

2

90cc / min

0.0019233

5

0.02

2

90cc / min

0.002512

6

0.0225

2

90cc / min

0.0031793

7

0.025

2

90cc / min

0.003925

[0044] "Hole radius" means the radius of e...

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Abstract

The present invention relates to an electrode for an electrosurgical unit for the use in ablating and necrosing a living tissue by RF electric energy. The present invention provides an electrode for an electrosurgical unit, including: a hollow electrode formed in an elongated hollow tube shape, a non-insulating region of a predetermined length being formed on one side of which, an insulating region being formed on an outer surface of which other than the non-insulating region; a saline solution circulation structure that supplies pressurized saline solution for cooling a living tissue which is in contact with the hollow electrode from the outside of the living tissue to the inside of the hollow electrode, and discharges the pressurized saline solution from the inside of the hollow electrode to the outside of the living tissue; and one or more saline solution discharge holes formed in the non-insulating region of the hollow electrode to discharge some of the circulating pressurized saline solution to the living tissue which is in contact with the hollow electrode.

Description

technical field [0001] The present invention relates to an electrode for an electrosurgical device, and more particularly, to an electrode for an electrosurgical device for ablation and necrosis of living tissue by RF electrical energy. Background technique [0002] Techniques are known for inserting a long hollow tubular electrode through and inserting target living tissue and using RF energy to ablate (or coagulate) the living tissue. In this case, when an electric current flows into living tissue, the living tissue is heated so that the living tissue and blood vessels are ablated by a somewhat complex biochemical mechanism. This process relies on the erosion of cells caused by thermal deformation of proteins in cells above about 60°C. Here, cells include tissues, blood vessels and blood. However, this technique has a problem in that the living tissue and blood around the electrode are excessively ablated and carbonized, and the carbonized living tissue around the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/14
CPCA61B2218/002A61B18/1477A61B18/16A61B2018/00083A61B2018/1425A61B2018/00029A61B2018/1253A61B18/12A61B18/14
Inventor 全明基
Owner RF MEDICAL
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