JPH09322902A - Scalpel tip electrode for high-frequency electric scalpel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop bleeding and solidify it at once over a wide area by surrounding a part of bundle of plural slender pins composed of conductive materials in lengthwise direction with a cylinder and widening the top ends of parts of pins protruded from the cylinder distributedly over the area wider than the cross-sectional area of the cylinder. SOLUTION: A scalpel tip electrode has plural slender stick-shaped pins 20 composed of conductors and a cylinder 22 for bundling and fixing one end of these members, and the other ends of pins 20 are formed while being radially spread. Besides, one ends of pins 20 are spread on a plane 24 distributed on one or plural circles or the center of the circle (a). Otherwise, one ends of pins 20 are spread on a curved surface 26 and distributed on one or plural circles or the center of the circle (b). These pins 20 or the cylinder 22 are composed of a conductive metal, and the pins 20 and the cylinder 22 are fixed by brazing one end 22a of the cylinder 22a. Besides, it is preferable to set the diameter of the pin 20 from 0.2mm to 0.3mm and to set the number of pins 20 from 2 to 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency treatment instrument, that is, a high-frequency electric scalpel for performing incision and resection of a living tissue by high-frequency current or performing blood coagulation or the like.

[0002]

2. Description of the Related Art As shown in FIG.
The high frequency output terminals (A, B) of the electrosurgical unit 10 that generates high frequency power are guided to the counter electrode plate 14 and the scalpel electrode 16b that are in contact with the skin of the human body (or animal) 12, and the scalpel electrode 1 is used.
6b generates heat at the tip and cuts, cuts, cauterizes,
Perform hemostasis, blood coagulation, etc.

The conductive knife tip electrode 16b is attached to an insulating cylindrical knife holder 16a and projects from the tip thereof. The scalpel tip electrode 16b is connected to the output terminal (A) of the electrosurgical instrument 10 by a lead wire.

[0004] Conventional scalpel tips of electric scalpels using high frequency include knife, needle, spear, naginata, and spatula type.
It is ring-shaped or ball-shaped, and the best shape and size of the scalpel tip is selected according to the surgical site and surgical purpose,
Treatment such as incision, mixing, and hemostatic coagulation is performed by contacting the surgical site.

[0005] Recently, high-frequency voltages (8000
(Approximately 12000 V), the scalpel tip electrode is separated from the affected area, and hemostatic coagulation is performed by arc discharge.

[0006]

By the way, since the conventional tip of the scalpel electrode has a sharp tip in general, there is a drawback that the target area is small when it is used for the purpose of hemostatic coagulation. In addition, when the tip has a ring shape or a curved tip, discharge is generated over a wide target area,
Hemostatic coagulation is difficult to perform.

[0007] Therefore, the present invention is to improve the narrow discharge area of the prior art, and relates to a high-frequency electric scalpel capable of simultaneously hemostatically coagulating a wide target area of an affected area by using the same low-frequency high-frequency voltage as in the prior art. The purpose is to provide a scalpel tip electrode.

[0008]

A feature of the present invention for achieving the above object is that the scalpel tip electrode is composed of a plurality of elongated rod-shaped members.

[0009] Preferably, the elongated rod-like members are bundled at one end and radially open at the other end.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows various mounting examples of a scalpel electrode according to the present invention. The scalpel tip electrode according to the present invention generally includes a pin 20 made of a plurality of elongated rod-shaped members made of a conductor,
And a tubular portion 22 for bundling and fixing one end of the member in the longitudinal direction. The other end of the pin 20 has a radially open shape as shown.

In the embodiment of FIG. 2A, one end of the pin 20 extends over the plane 24 and is distributed on or in the center of one or more circles.

In the embodiment of FIG. 2 (b), one end of the pin 20 extends over a curved surface 26 (eg, a spherical surface) and is distributed on or in the center of one or more circles.

In the embodiment of FIG. 2 (c), one end of the pin 20 terminates on a flat surface 28, and in FIG. 2 (d) one end of the pin 20 terminates on a curved surface 30.

In the embodiment of FIGS. 2 (a) and 2 (b), one end of the pin 20 spreads radially, and FIG.
In the example of (d), the bundle of pins 20 does not spread,
The thickness of the bundle is the same as the thickness of the holder 22 portion.

In the embodiment that spreads radially, the plane in which the tips of the pins are distributed is circular or rectangular (see FIG. 2).
(E)).

The embodiment shown in FIG. 2 (f) has a structure in which the cylinder 22 is bent at an angle α, and is applicable to any of the embodiments (a) to (d). A different structure may be adopted.

In each of the above embodiments, the pin and the cylinder are made of a conductive metal, preferably stainless steel. The pin and the cylinder are fixed by brazing at one end 22a of the cylinder.

The diameter of the pin is preferably 0.05 mm to
Selected between 2.5 mm, particularly preferably 0.2 mm
~ 0.3 mm.

The number of pins is about 2 to 50 (particularly preferably 8 to 20). Radiation diameter (D) is 2mm-30
mm and particularly preferably 3 mm to 10 mm.

According to a preferred embodiment, the diameter is 0.2 mm.
18 pins are used, and in another embodiment a diameter of 0.3
Eight mm pins are used.

The length L ₁ of the tip of the pin is, for example, 0.5 m.
m to 50 mm (more preferably 10 to 25 mm),
The length L _{2 of the} cylinder is about 30 mm, but in the case of laparoscopic surgery, the length L _{2 of the} cylinder is about 370 to 400 mm. In the case of endoscopic surgery, the length of L ₂ is 2 to
The length is about 5 mm.

In the flat type (FIGS. 2 (a) and 2 (c)), the hemostatic coagulation is performed by vertically contacting the flat part of the affected area. In the curved surface type (FIGS. 2 (b) and 2 (d)), the hemostatic coagulation is performed by vertically applying the curved surface portion of the affected area.

In each of the above constructions, when the tip of the pin is brought into contact with the affected area and electricity is applied, a wide area defined by the tip of the pin is fine and simultaneously hemostatically coagulated. The high-frequency voltage required at this time is sufficient as the conventionally used voltage.

[0024]

As described in detail above, according to the present invention, the tips of the scalpels are sharp and distributed over a certain area, so that a large area can be hemostatically coagulated at one time.

[Brief description of drawings]

FIG. 1 shows a typical use example of an electric knife.

FIG. 2 shows an embodiment of a scalpel point according to the present invention.

[Explanation of symbols]

 20 pin 22 pin holding cylinder

Claims (2)

[Claims] 1. A bundle of a plurality of elongated pins made of a conductive material, and a cylinder for surrounding a part of the bundle of pins in the longitudinal direction and fixing the bundle of pins. A scalpel tip electrode for a high-frequency electric scalpel, characterized in that the tip of the protruding portion is distributed and spread over a larger area than the cross-sectional area of the cylinder. 2. The knife tip electrode for a high frequency electric knife according to claim 1, wherein the number of pins forming the bundle is one selected from 2 to 50.