JPH0549645A - Manufacture of surgical operation needle with thread - Google Patents

Abstract

(57) [Summary] [Object] To provide a method for manufacturing a surgical needle with a thread, which is optimal for manufacturing a surgical needle with a thread having a diameter as small as 100 μm or less and being extremely short. More specifically, the present invention provides a method capable of easily manufacturing a threaded surgical needle without breaking the formed points. [Structure] Point formation is performed in the final step. In addition, prepare a base material longer than the final length of the surgical needle in advance, drill a hole,
After thread attachment and bending, the substrate is cut to a length approximately the same as the final length of the surgical needle, and a point is formed at the other end of the substrate formed by the cutting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a surgical needle with a thread.

[0002]

2. Description of the Related Art One of conventional methods for manufacturing a surgical needle with a thread is disclosed in US Pat. No. 5,012,066 (Japanese Patent Laid-Open No. 90237/1990).
(Corresponding to No. 63) as a prior art.
No. 212027, U.S. Pat. No. 4,910,377 (corresponding to JP-A-1-130888 and JP-A-2-52189). That is, in the disclosed method, forming a point at one end of the elongated substrate,
The steps of forming a hole in the other end surface, inserting one end of the thread into this hole and caulking the other end of the base material to attach the thread to the base material, and bending the base material are performed in this order. ing.

[0003]

However, in the above method, since the points are formed in the first step, there is a high possibility that the points will be destroyed in the subsequent thread attaching step and bending step. That is, in the thread attaching process,
When caulking the other end of the base material, the vicinity of the one end where the point is formed is gripped by the jig, so the point is easily broken by the jig. Further, since the base material is bent to the point, the point is easily broken. Furthermore, during storage and transportation of the base material after the point formation, the points may be destroyed due to contact between the base materials.

In the above-mentioned US Pat. No. 4,910,377,
Although there is a statement that point formation may be performed after drilling, there is no description that point formation is performed after the thread attaching and bending steps.

FIG. 3 of Japanese Examined Patent Publication No. 60-35151 shows
Make a hole in one end surface of the base material that is longer than the final length of the surgical needle,
Next, there is disclosed a method of cutting from this one end to a length substantially equal to the final length of the surgical needle and then forming a point with a cutting edge at this cutting end.
Although there is no description about the bending of the base material and the attachment of the thread, it can be inferred from the figure that it is performed after this point formation. Therefore, even with this method, the above inconvenience cannot be solved.

In Japanese Patent Application Laid-Open No. 59-17339, the diameter is 20.
A method of forming points on one end of a base material of 0 μm or less by electrolytic polishing is disclosed. In this publication, first, points are formed on both ends of a base material, and thereafter, the material is cut into a required length, and then a hole is formed in an end surface formed by cutting,
Next, a method of bending is disclosed. There is no description about thread installation. There is no doubt that the thread mounting and bending takes place after the point formation. Therefore, even with this method, the above inconvenience cannot be solved.

Further, as another problem, the shorter the surgical needle is, the more difficult it is to hold the substrate when attaching the thread, and the more difficult it is to bend. This problem has not been solved by the above-mentioned prior art. In the methods of Japanese Patent Publication No. 60-35151 and Japanese Patent Laid-Open No. 59-17339, a base material longer than the final length of the surgical needle is used, but this base material has a final length of the surgical needle before thread attachment and bending. Has been cut.

[0008]

A common subject matter of the inventions of claims 1 to 3 is a method of manufacturing a surgical needle with a thread, in which a point is formed in the last step of the constituent steps. In the method of the inventions of claims 2 and 3, the base material previously formed longer than the final length of the surgical needle is perforated and thread-attached (in claim 3, further curved), and then perforated. The cut end is cut into a length substantially equal to the final length of the surgical needle, and a point is formed at the other end formed by this cutting.

[0009]

In the inventions of claims 1 to 3, since the points are formed in the last step, it is possible to prevent the points from being broken in the thread attaching step (further, in the bending step in claim 3). Further, in the inventions of claims 2 and 3, since thread attachment (further bending in claim 3) is performed on a base material longer than the final length of the surgical needle, even if the final length of the surgical needle is short, these operations are performed. Can be done easily and accurately.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a taper point type surgical needle with thread according to the present invention will be described below with reference to the drawings. The surgical needle has a diameter of 100 μm or less and a length Lx (see FIG. 8) of 6.5 mm or less. For example, the diameter is 100μ
In the case of m, the length Lx is 3.5 to 6.5 mm. Diameter is 5
In the case of 0 μm, the length Lx is 2.5 to 4.5 mm. When the diameter is 30 μm, the length Lx is 1.5 to 3.5 mm.

All steps of this manufacturing method are shown in FIG. First, a wire made of stainless steel is prepared (step 100). A large number of elongated straight base materials 1 are prepared by cutting this wire (step 10).
1). The diameter of the base material 1 is almost the same as or slightly larger than the diameter of the surgical needle, and is shown exaggerated in the drawings. The length Lo of the base material 1 is, for example, 20 to 30 mm, which is considerably longer than the final length Lx of the surgical needle.

Next, as shown in FIG. 2, a large number of the above-mentioned base materials 1 are lined up and connected by an adhesive tape 5 (step 102). Next, with the base material 1 held by a holder (not shown), as shown in FIG. 3, one end face of the base material 1 is sequentially irradiated with a laser beam or an electron beam to form a hole 1a (step 103). ).

Next, the adhesive tape 5 is removed from the base material 1 and these base materials are chemically polished (step 104). This chemical polishing is performed for removing the oxide film on the surface of the needle material 1, removing burrs formed at the entrance of the hole 1a, adjusting the diameter of the base material 1, and the like.

Next, as shown in FIG. 4, one end portion of the thread 2 is inserted into the hole 1a, and one end portion of the base material 1 is formed by a pair of molds having grooves each having a substantially semicircular cross section. By crimping,
The thread 2 is attached to the substrate 1 (step 105).

Next, the substrate 1 is curved by the known method shown in FIG. 5 (step 106). More specifically, a stiff roller 6 and an elastic roller 7 that can move toward and away from the roller 6 are prepared. The roller 7 is pressed against the roller 6 with the base material 1 placed between the rollers 6 and 7. Then, the roller 7 is rotated and the roller 6 is rotated together. Thereby, the base material 1 is curved. The curved portion is approximately equal to the final length Lx of the surgical needle from one end where the hole 1a is formed. The curved portion may be a part of the portion corresponding to the final length Lx from this one end, or may be longer than the final length Lx. Further, this bending may be performed except for one end where the hole 1a is formed.
As described above, since the length Lo of the base material 1 is sufficiently long,
It is possible to easily hold the base material 1 and attach the base material 1 when the thread is attached.

Next, as shown in FIG. 7, the substrate 1 is several μm or several 1 from the one end to the final length Lx of the surgical needle.
Cutting is performed at a length of 0 μm (step 107). Next, as shown in FIG. 8, the point 1b is applied to the other end of the substrate 1 by the electrolytic polishing method described in JP-A-59-17339.
Are formed (step 108). More specifically, an electrolytic solution composed of an aqueous solution of phosphoric acid and dichromic acid is used. A positive electrode of a power source is connected to the base material 1, and a negative electrode is connected to the electrode rod. Base material 1 with the electrode rod immersed in the electrolyte
The cut end of is contacted with the electrolyte for a short time. As a result, the point 1b is formed at the cut end of the base material 1. Next, the vicinity of the point 1b of the needle material 1 is neutralized and washed (step 109).

With the above, manufacturing of the surgical needle 3 with the thread 2 is completed. After this, as shown in FIG. 9, the surgical needle 3 is hooked on the edge of the plate 8 having a special shape, the thread 2 is wound around the plate 8 and then wrapped.

The present invention is not limited to the above embodiment, and various modes are possible. For example, thread attachment may be performed after bending. Also, the curve may be omitted. The point formation is not limited to the electrolytic polishing method, and may be performed by a chemical polishing method using a strong acid, a sandblast method, or the like. The thread may be attached by an adhesive instead of caulking.

[0019]

According to the inventions of claims 1 to 3, it is possible to prevent the points from being broken in the thread attaching step (further, in the bending step in claim 3). In the inventions of claims 2 and 3, even when the final length of the surgical needle is short, thread attachment (claim 3
Then, the work of bending) can be performed easily and accurately.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an embodiment of a method of manufacturing a surgical needle with thread according to the present invention in the order of steps.

FIG. 2 is a diagram showing a large number of taped substrates.

FIG. 3 is a diagram showing a boring operation for a base material.

FIG. 4 is a view showing the base material after the thread attachment is completed.

FIG. 5 is a diagram showing a bending operation of a base material.

FIG. 6 is a diagram showing the base material after bending is completed.

FIG. 7 is a view showing the base material after cutting is completed.

FIG. 8 is a view showing a base material after point formation is completed, that is, a surgical needle with a thread which is a final product.

FIG. 9 is a view showing a state in which the completed surgical needle with a thread is wound around a plate.

[Explanation of symbols]

 1 ... Base material 1a ... Hole 1b ... Point 2 ... Thread 3 ... Surgical needle

Claims (4)

[Claims] 1. A process of (a) making a hole along an axial direction in one end face of an elongated base material, and (b) inserting and fixing one end part of a thread in this hole,
A thread comprising a step of attaching a thread to a base material, and (c) a step of forming a point on the other end portion of the base material, which is performed in the order of steps (a), (b) and (c). Of manufacturing surgical needle with needle. 2. A process of (a) making a hole along an axial direction in one end face of an elongated base material longer than the final length of a surgical needle, and (b) inserting and fixing one end part of a thread into this hole.
Obtained by the step of attaching the thread to the base material, (c) cutting the base material from the one end to a length substantially equal to the final length of the surgical needle, and (d) cutting in the step (c). And a step of forming a point on the other end of the base material, and the steps (a), (b), (c), and (d) are carried out in this order. 3. A process of: (a) making a hole along an axial direction in one end face of an elongated base material longer than the final length of a surgical needle; and (b) inserting and fixing one end part of a thread into this hole.
Attaching the thread to the base material; (c) bending the base material at least at a part of the site extending from the one end to the final length of the surgical needle; and (d) applying the base material from the one end to the surgical needle. And a step of forming a point at the other end of the base material obtained by the cutting in the step (d), and the step (b) , (c) is carried out before step (a), and steps (d) and (e) are carried out in this order after steps (b) and (c). .. 4. The method for manufacturing a surgical needle with thread according to claim 1, wherein the points are formed by an electrolytic polishing method.