JP2001293062A - Electric stimulation needle and method for processing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a cutting degree at the time of needling and to set a current supply range to a pinpoint. SOLUTION: An electric stimulation needle has a second bevel 12 comprising an inclined surface, of which the area is smaller than the inclined surface of a first bevel 11, other than the first bevel 11 and only the second bevel 12 is not coated with an insulating film. Accordingly, the cutting degree at the time of needling is kept well by the second bevel 12 and, since the area of the inclined surface constituting the second bevel 12 is smaller than that of the inclined surface of the first bevel, the current supply range can be made narrow and, when the electric stimulation needle is thrust in the body of a person to allow a current to flow, the position of a nerve to which an anesthetic can be administered can be found out accurately and efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric stimulation needle and a method for processing the electric stimulation needle.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional electric stimulation needle 100 is formed of a cylindrical body having a needle hole 100a, and has an inclined surface (bevel) 100b whose tip is obliquely cut. It is configured. When puncturing a human body and applying an electric current, the surface of the nerve is coated with an insulating coating except for necessary parts in order to accurately and efficiently find the position of a nerve to which an anesthetic can be administered.

In the conventional electric stimulation needle 100, as shown in FIG. 4, the insulating coating 100c has a portion excluding an inclined surface (bevel) 100b formed by diagonally cutting the tip. In order to apply the electric stimulus to a narrower area or to apply the electric stimulus to a narrower area, as shown in FIG. 5, except for a small part 100d at the tip of the inclined surface 100b, other parts of the inclined surface 100b are used. Usually, it is applied to the peripheral surface of the cylindrical body (the part shown by oblique lines) including the above-mentioned part.

[0004]

However, the one shown in FIG. 4 has a merit that the whole sloping surface 100b is exposed and not coated with the insulating film 100c, so that the puncture is good when cut. In addition, since the current supply range is wide, there is a problem that it is inferior to that shown in FIG. Conversely, the one shown in FIG. 5 has a very narrow energization range, and can accurately and efficiently find a target portion. However, since most portions of the inclined surface 100b are hidden by the insulating coating, the one shown in FIG. There is a problem that the cutting condition is poor.

The present invention has been made in view of the above points, and provides an electric stimulating needle which can exhibit a good cutting performance when punctured into a body, and which can accurately and efficiently find a target site. An object of the present invention is to provide a method for processing an electric stimulation needle.

[0006]

According to a first aspect of the present invention, there is provided an electric stimulating needle comprising a cylindrical body having a needle hole and capable of applying an electric stimulus by energization. An electrostimulation needle, which is cut obliquely to form a first bevel formed at a distal end thereof;
A second bevel formed of an inclined surface intersecting the first bevel and having an area smaller than the first bevel, and a surface of the cylindrical body and the first bevel except for the second bevel. And an applied insulating coating.

According to a second aspect of the present invention, there is provided a method for processing an electrical stimulation needle, comprising a cylindrical body having a needle hole, wherein the electrical stimulation needle can be provided with an electrical stimulation by energization. A step of forming a first bevel at the distal end by cutting the cylindrical body obliquely, and cutting a part of the cylindrical body, intersecting the first bevel, and cutting the first bevel more than the first bevel Forming a second bevel consisting of a small-area inclined surface, and covering the surface of the second bevel with a mask member, and then applying an insulating coating on at least the surface of the first bevel and the surface of the cylindrical body. Forming, and removing the mask member covering the surface of the second bevel.

According to a third aspect of the present invention, there is provided a method for processing an electrical stimulation needle according to the second aspect, wherein the insulating film is formed by electrostatic coating, powder coating, or electrodeposition coating. It is characterized by forming.

According to a fourth aspect of the present invention, there is provided a method for processing an electrical stimulation needle, comprising a cylindrical body having a needle hole, wherein the electrical stimulation needle is capable of applying an electrical stimulation when energized. Forming a first bevel at the tip by cutting the tubular body obliquely; forming an insulating coating on the surface of the first bevel and the surface of the tubular body; Cutting a part of the cylindrical body and forming a second bevel having an inclined surface having an area smaller than that of the first bevel so as to cross the first bevel. .

According to a fifth aspect of the present invention, there is provided a method of processing an electrical stimulation needle according to the fourth aspect, wherein the insulating film is formed by electrostatic coating, powder coating or electrodeposition coating. It is characterized by forming.

(Function) According to the present invention, it is possible to provide an electric stimulating needle in which only the second bevel is not coated with the insulating film, so that the degree of cutting during puncturing is better maintained by the second bevel. At the same time, the area of the inclined surface forming the second bevel is smaller than the area of the first bevel, so that the energization range can be narrowed, and the target nerve site can be found accurately and efficiently.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a diagram showing a part of an electric stimulating device 10 including an electric stimulating needle 1 according to one embodiment of the present invention. As shown in this figure, the electric stimulation needle 1 is formed of a cylindrical body having a hollow portion forming a needle hole 1a, and a tube 4 for introducing a drug such as an anesthetic is connected to a rear end thereof. The hub 2 is attached. The hub 2 itself is made of a conductive material such as a metal as shown in FIG.
As shown in (b), the hub 2 has a connecting portion 2a made of a conductive material inside the hub 2, and the hub 2 itself or the connecting portion 2a is connected to the conducting wire 3, and the electric stimulation needle is provided. 1, a current is supplied from a current supply source (not shown).

More specifically, as shown in FIG. 2, the electric stimulating needle 1 has a first bevel 11 having a slope formed by diagonally cutting a cylindrical body at a distal end thereof. Further, in the present embodiment, as shown in FIG. 2B, a second bevel 12 which is a tip portion of the tubular body and has an inclined surface intersecting with the first bevel 11 is formed. . The second bevel 12 shown in FIG. 2 is of a so-called back cut type, and is formed by being cut obliquely backward and downward from a leading edge 11 a of the first bevel 11.

The second bevel 12 is not limited to what is called a backcut,
As shown in FIG. 3, the leading edge 11a of the first bevel 11
It is also possible to form a so-called quinque type, which is inclined obliquely outward from, and forms an inclined surface curved toward the front end edge center 11b.

The slope of the second bevel 12 is formed so that its area is smaller than that of the first bevel 11 in any case.

In the electric stimulation needle 1 of the present embodiment, the insulating coating 13 is applied to the surface (the portion shown by oblique lines in FIGS. 2 and 3) excluding the inclined surface constituting the second bevel 12 described above. Have been. That is, the electric stimulation needle 1 is provided on the inclined surface forming the first bevel 11.
Is applied to the surface of the other parts constituting the structure except for the second bevel 12.

Therefore, according to the present embodiment, since the area of the second bevel 12 is smaller than that of the first bevel 11, the entirety of the inclined surface corresponding to the first bevel 11 is shown in FIG. Compared with the conventional one, the current supply range is narrower, and a desired nerve site can be found accurately and efficiently.
On the other hand, since it has the second bevel 12 on which the insulating coating 13 is not applied, the second bevel 12 can reliably cut tissue in the body, and the first bevel 1
As compared with the conventional one shown in FIG. 5 in which the insulating coating is applied except for a small area at the tip of the inclined surface corresponding to 1, a better cutting condition can be exhibited.

Next, an example of a method of processing the above-described electric stimulation needle 1 will be described. First, a stainless steel tubular body is cut obliquely to a predetermined length. As a result, the first bevel 11 having the inclined surface cut obliquely at the tip is formed. Then, the surface of the first bevel 11 is polished as necessary. Next, it cuts using a grinding tool etc., and forms the 2nd bevel 12 like the above-mentioned back cut type or Quinke type. Next, the surface of the second bevel 12 is covered with an arbitrary mask member (not shown), and then the material for forming the insulating coating 13 is coated on the surface of the first bevel 11 including the surface of the mask member. And the entire cylindrical surface of the cylindrical body. The application means is arbitrary, but electrostatic coating or the like which has been conventionally used for forming an insulating film in an electric stimulation needle can be used. next,
The mask member covering the surface of the second bevel 12 is peeled off. Thereby, the electrical stimulation needle 1 in which only the surface of the second bevel 12 is not covered with the insulating coating can be manufactured.

The processing method of the electric stimulation needle 1 is not limited to the above-described processing method, and the following method can be adopted. That is, first, the first bevel 11 is formed in the same manner as in the above processing method. Next, an insulating coating is formed on the entire surface of the electrostimulation needle 1, that is, on the surface of the first bevel 11 and the peripheral surface of the cylindrical body by electrostatic painting or the like as described above. Next, cutting is performed using an arbitrary polishing tool to form the second bevel 12 such as the back cut type or the quinque type described above. According to this processing method, the second bevel 12 is formed after the insulating film 13 is formed. Therefore, when the second bevel 12 is formed, the second bevel 12 adheres to a portion corresponding to the second bevel 12 with a polishing tool. The insulating coating that has been removed is also removed. Therefore, the electrical stimulation needle 1 in which only the surface of the second bevel 12 is not covered with the insulating coating can be manufactured by this method.

[0020]

According to the electric stimulation needle and the method for processing the electric stimulation needle of the present invention, the second bevel made up of the first bevel and the inclined surface having a smaller area than the inclined surface constituting the first bevel.
, And only the second bevel is not coated with an insulating film. For this reason, the cutting condition at the time of puncturing is favorably maintained by the second bevel, and the area of the inclined surface constituting the second bevel is smaller than the area of the inclined surface of the first bevel. The location of nerves that can be narrowed and can be administered with an anesthetic can be accurately and efficiently found. That is, according to the present invention, it is possible to provide an electric stimulating needle having an excellent balance between the cutting degree at the time of puncturing and the energization range.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of an electric stimulating device provided with an electric stimulating needle according to one embodiment of the present invention.

FIGS. 2A and 2B are views showing a main part of an example of the electric stimulation needle according to the embodiment, wherein FIG. 2A is a plan view and FIG. 2B is a side view.

FIGS. 3A and 3B are views showing a main part of an example of the electric stimulation needle according to the embodiment, wherein FIG. 3A is a plan view and FIG. 3B is a side view.

FIGS. 4A and 4B are diagrams showing a main part of an example of a conventional electric stimulation needle, wherein FIG. 4A is a plan view and FIG. 4B is a side view.

FIG. 5 is a view showing a main part of another example of the conventional electric stimulation needle, where (a) is a plan view and (b) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrical stimulation needle 10 Electrical stimulator 11 First bevel 12 Second bevel 13 Insulation coating 2 Hub 3 Conductor 4 Tube

Claims (5)

[Claims] An electric stimulation needle comprising a cylindrical body having a needle hole and capable of applying an electric stimulus by energization, wherein the first bevel formed at a tip portion by being cut obliquely. And a second bevel formed of an inclined surface intersecting the first bevel and having an area smaller than the first bevel; and excluding the second bevel, the cylindrical body and the first bevel. An electrical stimulation needle comprising: an insulating coating applied to the surface of the bevel. 2. A method for processing an electrical stimulation needle comprising a cylindrical body having a needle hole and capable of applying an electrical stimulus by energization, wherein the cylindrical body is cut obliquely to provide a distal end portion. Forming a first bevel; cutting a part of the tubular body, intersecting the first bevel,
Forming a second bevel having an inclined surface having an area smaller than that of the first bevel, and after covering a surface of the second bevel with a mask member, at least a surface of the first bevel and a cylindrical body Forming an insulating film on the surface of the first bevel, and removing a mask member covering the surface of the second bevel. 3. The method for processing an electrical stimulation needle according to claim 2, wherein the insulating film is formed by electrostatic coating, powder coating or electrodeposition coating. 4. A method for processing an electric stimulation needle comprising a cylindrical body having a needle hole and capable of applying an electric stimulus by energization, wherein the cylindrical body is obliquely cut to provide a tip end portion. Forming a first bevel; forming an insulating coating on the surface of the first bevel and the surface of the cylindrical body; cutting a part of the cylindrical body together with the insulating coating; Forming a second bevel formed of an inclined surface having an area smaller than that of the first bevel so as to intersect the bevel. 5. The method for processing an electrical stimulation needle according to claim 4, wherein the insulating film is formed by electrostatic coating, powder coating, or electrodeposition coating.