JP2001321881A - Manufacturing method of suture needle for operation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a suture needle for the operation which can firmly keep the strength against the bending moment and improve the piercing property to the tissue. SOLUTION: A tip side of a round bar-like needle 11 is pressed to form a triangular bar-like portion 14 with an upper formed surface 15 in a substantially flat shape. The tip of the triangular bar-like portion 14 is placed in a pressing die 33 having a V-shaped groove 34 which becomes gradually narrower and shallower toward the tip, and ridges 16, 17, 18 of the triangular bar-like portion 14 are intersected at the tips thereof with each other to form a needle tip part 21 having a blade portion 19 of substantially isosceles triangular section. The portion of the ridge 16 is worked in a substantially flat shape of the predetermined width and length from a part close to the tip of the needle tip part 21 toward a base side, and the worked portion is formed trapezoidal in section. An upper surface 15 of the blade portion 19 is ground in substantially flat, a flash piece 20 is ground off to form a bald tip 19a, and a cutting blade 25 is formed on ridges 27a, 18a on both sides of the blade tip 19a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a surgical needle for use in various operations.

[0002]

2. Description of the Related Art Surgical suture needles have a high strength against a bending moment applied perpendicularly to the suture needle when suturing, and a penetration resistance when penetrating tissue is minimized. It is preferable to configure so as to reduce the pain.

As a conventional method for manufacturing a surgical suture needle, for example, a technique shown in FIG. 10 is generally known. According to this conventional technique, a press forming die (not shown) provided with a V-groove is used to press one end of a round bar-shaped needle material. A substantially equilateral triangular bar-shaped portion 1 is formed. Next, the upper surface 2 on the distal end side of the rod-shaped portion 1 is indicated by an imaginary line 3 in FIG.
By this grinding, as shown in FIG. B, the ridge lines provided on both sides of the grinding surface 2a are sharply formed as the cutting blades 4 and 5, and the tip is sharply formed. It is manufactured.

However, in the suture needle manufactured by the above-described conventional technique, the entire cutting edge is formed in a substantially equilateral triangular cross section, so that the height h from the ground surface 2a to the apex (ridge line 6) is increased. The cross-sectional area increases. For this reason, there is a problem that puncture resistance at the time of piercing the tissue is increased, which causes pain to the patient.

[0005] To solve the above problem, FIG.
As shown in the figure, the triangular bar-shaped portion 1 is moved to the vertex (ridge line 6a).
The upper surface 7 on the tip side of the rod-shaped portion 1 is formed as shown by the imaginary line 3a in the same manner as described above. Then, as shown in FIG. D, a method has been proposed in which ridges provided on both sides of the grinding surface 7a are sharply formed as acute-angled cutting edges 4a, 5a to manufacture a suture needle. Cutting unit according to this method is formed in a cross-section an obtuse triangular shape, the height h ₁ from the grinding surface 7a until ridge 6a is lower than that of FIG. 10B, the cross-sectional area decreases. Therefore, the piercing resistance can be reduced and the pain of the patient can be reduced.

However, if the cutting edges 4a and 5a of the ridges on both sides of the upper surface 7a are formed at an acute angle to reduce the distance from the surface 7a to the ridge 6a, the piercing resistance is reduced as described above. In this case, the strength decreases with respect to the bending moment applied perpendicularly to the suturing needle, and the bending becomes easy. As a result, there arises a problem that operability at the time of suturing is deteriorated.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a method of manufacturing a surgical suture needle capable of maintaining a high strength against a bending moment and improving piercing property to a tissue. The purpose is to do so.

[0008]

Means for Solving the Problems In order to achieve the above object, one invention (first invention) of the present invention is to press (primary work) one end of a round bar-shaped needle material to obtain a processed upper surface. A first press forming step of forming a triangular bar-shaped portion formed into a substantially planar shape, and a second press working of a tip portion of the triangular bar-shaped portion, and the processed upper surface has a substantially planar shape, and The ridge lines on both sides of the primary processing upper surface of the portion and the ridge line corresponding to the upper surface respectively intersect at the tip, and a cutting edge forming portion formed in a substantially isosceles triangular cross section, and a surplus portion of the triangular bar-shaped portion are formed as cutting edge forming portions. A second press-forming step of forming a needle tip having a flat burr piece formed by protruding outward from the periphery of the ridge, and a portion of a ridge line corresponding to the processing upper surface of the triangular rod-shaped portion, From a point near the tip of the needle tip toward the base of the triangular bar, Forming a substantially trapezoidal section in the shape of the processed portion, and grinding the processed upper surface of the cutting edge forming portion into a substantially planar shape to scrape off the burr pieces and cut the cutting edge. And a step of forming cutting edges at ridges on both sides of the grinding surface of the cutting edge. In this specification, “grinding” used when forming a cutting edge and a cutting edge is used as meaning including polishing.

According to the above invention, the tip of the triangular bar is subjected to the secondary pressing to form the hardened and strengthened cutting edge forming portion, and the machined upper surface of the cutting edge forming portion is ground into a substantially planar shape. By removing the burr pieces, a uniform cutting edge having a reinforced tip is formed. Then, the portion of the ridge line corresponding to the processing upper surface of the triangular bar portion is formed into a substantially planar shape from near the tip of the needle tip toward the base side of the triangular bar portion, and the processed portion is formed into a trapezoidal cross section. Since the height of the cutting edge is formed to be low, piercing resistance is reduced, piercing at the time of piercing is improved, and pain of the patient is relieved. In addition, by the processing of the trapezoidal cross section, the processing portion is reduced in height and the portion is thinned, but the cutting edge portion is hardened by twice pressing (primary and secondary pressing).
Since it is reinforced, the strength against the bending moment is strongly maintained.

In the present invention, the processing means for forming the ridge line portion into a substantially planar shape is not particularly limited. For example, grinding processing is adopted as in the second aspect of the present invention, Press working can also be employed as in the described invention. In the present invention, in addition to the ridges on both sides of the grinding surface, the cutting edge is left at the tip of the needle tip and corresponds to the ridge corresponding to the grinding surface, as in the invention of claim 4. Can also be formed.

Another invention (second invention) of the present invention is that one end of a round bar-shaped needle material is pressed (primary processing).
A first press forming step of forming a triangular bar-shaped part having a substantially flat upper surface and a second press working of the triangular bar to form a triangular bar corresponding to the primary processed upper surface. Crushed in a substantially flat shape with a predetermined width to near the tip of the part, this processing part was formed into a trapezoidal cross section, and the ridge lines on both sides of the primary processing upper surface of the triangular rod part and the tip side of the triangular rod part were left. The ridge line intersects with the tip at each end, and a cutting edge forming portion having a substantially isosceles triangular cross section, and a flat burr piece formed by protruding an excess portion of the triangular bar-like portion outward from the periphery of the cutting edge forming portion. A second press forming step of forming a needle tip portion having the same, and grinding the processing upper surface of the blade tip forming portion into a substantially planar shape to scrape off the burr pieces to form a cutting edge, and the ground surface of the cutting edge. Forming cutting edges on the ridges on both sides of the It is characterized in.

According to the second aspect of the invention, in addition to the functions and effects of the first aspect of the invention, the operability of producing a suture needle is further improved. Also in this second invention, as in the invention according to claim 6, the cutting edge is formed not only on the ridges on both sides of the grinding surface but also on the ridges left on the tip side of the triangular bar-shaped portion. be able to.

Another invention (third invention) of the present invention is that one end of a round bar-shaped needle is pressed (primary processing).
Then, a first press forming step of forming a trapezoidal rod portion having a processing upper surface and a processing bottom surface formed in a substantially planar shape, and secondary pressing of the tip of the trapezoidal rod portion, and the processing upper surface is substantially flat. And the two ridge lines of the primary processing bottom surface of the trapezoidal rod portion intersect near the tip of the rod portion to form one ridge line, and the one ridge line and both sides of the primary processing upper surface The ridge line intersects with the tip at each end, and a blade edge forming portion formed in a substantially isosceles triangular cross-section, and a flat shape formed by protruding an excess portion of the trapezoidal rod portion outward from the peripheral edge of the blade edge forming portion. A second press forming step of forming a needle tip portion having a burr piece, and grinding the processed upper surface of the blade tip forming portion into a substantially planar shape to scrape off the burr piece to form a blade tip; Forming cutting edges on the ridges on both sides of the grinding surface of Characterized in that it contains.

According to the third aspect, in addition to the functions and effects of the first aspect, the production workability of the suturing needle is further improved as in the second aspect. Also, in the third invention, as in the invention according to claim 8, the cutting edge is formed on one ridge formed at the tip of the trapezoidal bar in addition to the ridges on both sides of the grinding surface. Can also be formed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view schematically showing an overall flow of a manufacturing process of an embodiment (Embodiment 1) of a method of manufacturing a surgical suture needle of the present invention, and FIG. FIG. 3 is an explanatory view showing a step of forming a needle tip in the manufacturing process, FIG. 4 is a side view and a bottom view showing a processed product processed by the step of FIG. FIG. 5 is an explanatory view showing a step of forming the needle tip side of the triangular rod portion into a trapezoidal cross section in the manufacturing process, and FIG. 6 is an explanatory view showing a step of forming a blade in the manufacturing step of FIG. .

In FIG. 1 to FIG.
1 is made of, for example, austenitic stainless steel (SUS304) or other stainless steel, and the diameter and length of the needle material 11 are selected according to the site to be sewn, the use, the purpose, and the like.

The manufacturing method of the present invention is an eyed needle in which a thread hole (caulking hole) is provided at the end of the needle base in the axial direction, and a spring hole (also referred to as a boring hole) or a Nami hole (also referred to as a normal hole) in the needle base. The needle material 11 can be applied to both eyeless needles provided with a thread hole. The needle material 11 has an end on the side of the needle base 12 at an arbitrary stage (usually before a step of forming a triangular bar-shaped portion). Thread hole 13
To form In this embodiment, an example in which a spring hole is provided as the thread hole 13 is disclosed (see FIG. 6A).

As shown in detail in FIG. 2, one end (tip end) of the needle material 11 is put into the V-shaped groove 32 of the press forming die 31 provided with the endless V-shaped groove 32, and this is inserted into the elevating press die ( Press working (primary working) (not shown). By this step, a triangular bar-shaped portion 14 is formed on the distal end side of the needle material 11 in which the processed upper surface 15 has a substantially planar shape and the cross-sectional shape has a substantially isosceles triangular shape (see FIG. Is done. The length of the triangular rod portion 14 is appropriately determined, and is formed, for example, in a range of about 1/2 to about 1/3 of the length of the needle material 11 (about 2/5 in the drawing). be able to.

Next, as shown in detail in FIG. 3, a press forming die 33 having a V-shaped groove 34 gradually narrowing in width and having a shallow groove is used. Is placed with the ridge line 16 corresponding to the upper surface 15 on the lower side and aligned with the V-groove 34 of the mold 33, and this is subjected to press working (secondary press working) by an elevating press mold (not shown). By this step, the secondary processing upper surface 15a has a substantially planar shape extending from the primary processing upper surface 15 at the tip of the triangular rod portion 14, and the ridge lines 17, 18 on both sides of the primary processing upper surface 15 of the triangular rod portion 14. And the ridge line 16 corresponding to the upper surface 15 intersect at the tip, respectively, so that the cross-sectional shape is
A tapered blade edge forming portion 19 having a substantially isosceles triangular shape having the base 5a as a base, and a surplus portion of the triangular bar portion 14 are formed to protrude outward from the periphery of the ridge lines 15a and 16a on both sides of the blade edge forming portion 19. A needle tip 21 having a flat burr piece 20 to be formed is formed. The needle tip portion 21 is hardened and strengthened by twice pressing (primary and secondary pressing).

The length of the cutting edge forming portion 19 is appropriately determined. For example, the length of the triangular rod portion 12 is about 1 /.
It can be formed in a range of about 3 to about 1/5 (about 1/4 in the figure).

Next, as shown by an imaginary line (grinding line L) in FIG. 4, the portion of the ridge line 16 corresponding to the upper surface 15 of the triangular rod portion 14 is located near the tip of the needle tip 21 and at the base of the rod portion 14. Grind into a generally flat shape of appropriate width and length toward the side. As a result of this step, the grinding portion is, as shown in detail in FIG.
And a trapezoidal section formed by the inclined wall surfaces 23 and 24 on both sides. The length of the grinding surface 22 can be appropriately set.
It can be formed to about 1/4 (about 3/8 in the figure).

Next, the processing upper surface 15 is ground into a substantially planar shape,
The burrs 20 are shaved off to form the cutting edges 19a (see FIG. 6). Then, the cutting edge 25 is formed on the ridgelines 17a and 18a on both sides of the ground surface 15a of the cutting edge 19a by grinding the blade edge 19a. The cutting blade 25 includes the grinding surface 15 a and the inclined wall surface 2.
It can be formed by grinding 3, 24. Also, in this case, when grinding the two wall surfaces 23 and 24,
The cutting edge 25a is also formed on the ridgeline 16a corresponding to the surface 15a, which is left at the tip of the cutting edge 19a. By the above process, a product of a straight needle is obtained, and in the case of a curved needle, as shown in FIGS. 6F and 1K, the entire needle is bent into a predetermined shape to be a product. With the above, it has a sharpened cutting edge 25 while having a sharpened cutting edge 26, and
A surgical suture needle having high strength against bending moment and improved penetration into tissue can be obtained.

FIG. 7 is an explanatory view showing a main part of another embodiment (Embodiment 2) of the method for manufacturing a surgical suture needle of the present invention. The second embodiment is characterized in that press working is employed as a processing means for forming a portion of the ridge line 16 corresponding to the upper surface 15 of the triangular rod portion 14 into a substantially planar shape.

That is, the second embodiment has an appropriate width and length instead of the grinding process of the first embodiment, and has one end (the right side in the drawing) corresponding to the tip end of the needle tip 21 in a circle. Using an elevating press die 35 having a press surface 36 formed in an arc shape, the processed product is placed on a platform 37 with the ridgeline 16 facing upward, and pressed by the press die 35 to remove the portion of the ridgeline 16. Crush and form into a substantially planar shape. Thus, the pressed portion of the triangular rod portion 14 is formed in a trapezoidal cross section by the upper surface 15 and the pressed upper surface and the inclined wall surfaces 23 and 24 on both sides. Other manufacturing steps and configurations are completely the same as those of the first embodiment, and thus description thereof is omitted. According to the second embodiment, a surgical suture needle having the same operation and effect as the first embodiment can be obtained. In this case, a press forming die having a groove as shown in FIG. 8, which will be described later, is used in place of the elevating press die 35. Alternatively, a method may be adopted in which the material is put into the mold so as to match with the groove of the mold, and is pressed by an elevating press mold (not shown) to form the processed portion into a trapezoidal cross section.

FIG. 8 is an explanatory view for explaining a main part of still another embodiment (Embodiment 3) of the method for manufacturing a surgical suture needle of the present invention. In the third embodiment, the needle tip 21
The processing means for forming the portion of the ridge line 16 into a substantially planar shape is characteristic.

That is, the third embodiment has a trapezoidal groove 38,
A press mold 40 having a V-shaped groove 39 extending in the groove 38 and having a narrow width toward the tip (right side in the figure) and a shallow groove is used. Then, the tip of the triangular rod 14 is set so that the ridgeline 16 is on the lower side and the grooves 38 and
39, and press work (secondary press work) is performed by an elevating press die (not shown).

According to the above-described process, the pressed portion of the triangular rod portion 14 is formed into a trapezoidal cross section by crushing the ridge line 16 at a predetermined width to near the tip of the rod portion 14 and forming the trapezoidal section. The ridge lines 17 and 18 on both sides of the primary processing upper surface 15 and the ridge line 16 left on the distal end side of the rod-shaped portion 14 are each formed at the distal end with the upper surface 15 so as to be flush with the upper surface 15. The cutting edge forming portion 19 having the shape and the flat burr piece 20 formed by protruding an excess portion on the tip end side of the triangular rod portion 14 outward from the peripheral edges of the ridge lines 15a and 16a on both sides of the cutting edge forming portion 19 are formed. Is formed. Other manufacturing steps and configurations are the same as those of the first embodiment, and thus description thereof is omitted. According to the third embodiment, a surgical suture needle having the same operation and effect as the first embodiment can be obtained.

FIG. 9 is an explanatory view showing a main part of still another embodiment (Embodiment 4) of the method for manufacturing a surgical suture needle of the present invention. The fourth embodiment is characterized by a processing step of forming a trapezoidal rod by pressing one end of the needle material 11 instead of the triangular rod 14 of the first embodiment.

That is, in the fourth embodiment, a press forming die 42 having an endless trapezoidal groove 41 is used, one end (tip end) of the needle material 11 is put into the groove 41, and this is inserted into an elevating press die ( Press working (primary working) (not shown). By this step, a trapezoidal bar-shaped portion 51 having a processing upper surface 52 and a processing bottom surface 53 formed in a substantially planar shape is formed on the distal end side of the needle material 11. The length of the trapezoidal bar portion 51 can be appropriately determined similarly to the triangular bar portion 14.
Range of about 1/2 to about 1/4 of the length (about 1
/ 3).

Other manufacturing steps and configurations are the same as those of the first embodiment. (However, in the fourth embodiment, the distal end side of the needle material 11 is formed in a trapezoidal cross section. The step of grinding or pressing the portion of the ridge line 16 into a substantially planar shape is omitted.), And the description thereof will be omitted. According to the fourth embodiment, a surgical suture needle having the same effect as that of the first embodiment can be obtained.

[0031]

According to the present invention, a surgical suturing needle capable of maintaining a high strength against bending moment to improve suturing operability and reducing piercing resistance during piercing to improve piercing performance. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing an overall flow of a manufacturing process of a manufacturing method of a surgical suture needle according to an embodiment of the present invention, and FIG. 1A shows a round bar-shaped needle material; FIG. B is a perspective view of a press forming die, FIG. C is an explanatory view showing a step of forming a triangular rod portion, FIG. D is an enlarged sectional view taken along line DD of FIG. C, and FIG. F is an explanatory view showing a step of forming a needle tip, FIG. G is an explanatory view showing a step of forming the needle tip side of the triangular rod portion into a trapezoidal cross section, and FIGS. FIG. 9 is a cross-sectional view and a perspective view taken along the line HH of FIG. G, FIG. J is an explanatory view showing a step of forming a cutting edge, and FIG. K is an explanatory view showing a step of manufacturing a curved needle.

FIGS. 2A and 2B are explanatory views showing, in an enlarged manner, a step of forming a triangular rod-shaped portion in the manufacturing process, wherein FIG. 2A is a perspective view of a processed product, FIG. 2B is a perspective view of a press mold, and FIG. C is an enlarged sectional view taken along line CC of FIG.

FIG. 3 is an enlarged explanatory view showing a step of forming a needle tip in the manufacturing process, wherein FIG. 3A is a perspective view of a processed product, FIG. 3B is a perspective view of a press mold, and FIG. FIG. C is the same as FIG.
-C sectional drawing.

FIG. 4 is a side view and a bottom view of a processed product processed by the process of FIG. 3;

FIG. 5 is an explanatory view showing a step of forming the needle tip side of the triangular bar into a trapezoidal cross section in the manufacturing process, in which FIG. A is a side view of a processed product, and FIG. And FIG. C is a sectional view taken along line CC of FIG.

6 is an explanatory view showing, in an enlarged scale, a step of forming a cutting edge in the manufacturing process, wherein FIG. 6A is a bottom view of a processed product, and FIGS. 6B and 6C are lines AA in FIG. A perspective view seen from one side and the other side shown by cutting, FIGS. D and E are BB of FIG.
FIG. F is an explanatory view showing a step of manufacturing a curved needle.

FIG. 7 is an explanatory view for explaining a main part of another embodiment of the method for manufacturing a surgical suture needle of the present invention.

FIG. 8 is an explanatory view illustrating a main part of still another embodiment of the method for producing a surgical suture needle of the present invention.

FIG. 9 is an explanatory view for explaining a main part of still another embodiment of the method for producing a surgical suture needle of the present invention. FIG. 9A is a perspective view of a processed product, and FIG. FIG. 2 is a perspective view showing the press mold, and FIG. 2C is a cross-sectional view taken along line CC of FIG.

FIG. 10 is an explanatory view for explaining a conventional method for manufacturing a surgical suture needle and its problems.

[Explanation of symbols]

11 ... needle material, 14 ... triangular bar-shaped part, 15 ... processing upper surface, 1
6, 17, 18 ... ridgeline, 17a, 18a ... ridgeline, 19 ...
Blade edge forming portion, 19a: Blade edge, 20: Burr piece, 21: Needle point, 33: Press mold, 34: V groove

Claims (8)

[Claims] 1. A first press forming step of pressing (primary processing) one end side of a round bar-shaped needle material to form a triangular bar portion having a processed upper surface formed in a substantially planar shape; The tip of the secondary press processing, this processing upper surface presents a substantially planar shape, and the ridge lines on both sides of the primary processing upper surface of the triangular rod-shaped portion and the ridge line corresponding to the upper surface each intersect at the tip, the cross section A needle tip portion having a cutting edge forming portion formed in a substantially isosceles triangular shape, and a flat burr piece formed by protruding an excess portion of the triangular bar portion outward from the periphery of the cutting edge forming portion. A second press forming step, and a ridge line portion corresponding to the processing upper surface of the triangular bar portion is substantially flat with a predetermined width and length from near the tip of the needle tip toward the base side of the triangular bar portion. And forming this processed part into a trapezoidal cross section. Grinding the processing upper surface of the cutting edge forming portion into a substantially planar shape and shaving off the burr pieces to form a cutting edge, and forming cutting edges on ridge lines on both sides of the ground surface of the cutting edge. A method for producing a surgical needle. 2. The method for manufacturing a surgical needle according to claim 1, wherein the processing means for forming the ridge portion into a substantially planar shape is grinding. 3. The processing means for forming the ridge portion into a substantially planar shape by press working.
A method for producing the surgical suture needle according to the above. 4. The cutting edge is formed on ridges on both sides of the grinding surface and ridges corresponding to the grinding surface, which are left at the tip of a needle tip. , 2
Or a method for producing a surgical suture needle according to item 3. 5. A first press forming step in which one end side of a round bar-shaped needle material is pressed (primary processing) to form a triangular bar having a processed upper surface formed in a substantially planar shape; Is subjected to secondary press processing, and the ridge line portion corresponding to the primary processing upper surface is crushed into a substantially flat shape with a predetermined width up to the vicinity of the tip of the triangular rod portion, and this processed portion is formed into a trapezoidal cross section, and The ridge lines on both sides of the primary processing upper surface of the part and the ridge line left on the tip side of the triangular bar-shaped portion each intersect at the tip, a cutting edge forming part having a substantially isosceles triangular cross section,
A second press forming step of forming a needle tip portion having a flat burr piece formed by protruding an excess portion of the triangular bar portion outward from the peripheral edge of the cutting edge forming portion; and Forming a cutting edge by grinding the processing upper surface into a substantially planar shape and shaving off the burr pieces, and forming a cutting edge on ridges on both sides of the ground surface of the cutting edge, Manufacturing method of surgical suture needle. 6. The surgical suture needle according to claim 5, wherein the cutting blade is formed on a ridge line on both sides of the grinding surface and a ridge line left on the tip side of the triangular bar-shaped portion. Production method. 7. A first press forming step of pressing (primary working) one end side of a round bar-shaped needle material to form a trapezoidal bar-shaped part having a processing upper surface and a processing bottom formed in a substantially planar shape; The tip of the trapezoidal rod is subjected to secondary press working, the upper surface of the trapezoidal rod has a substantially planar shape, and the two ridge lines of the primary processing bottom of the trapezoidal rod intersect near the tip of the rod-like part to form one. The ridge line is formed, and this ridge line and the ridge lines on both sides of the primary processing upper surface each intersect at the tip, and the cutting edge forming portion formed in a substantially isosceles triangular cross section and the excess trapezoidal rod-shaped portion A second press forming step of forming a needle tip portion having a flat burr piece formed by protruding a portion outward from a peripheral edge of the blade edge forming portion; and a substantially flat surface of the processing upper surface of the blade edge forming portion. Grinding to form a cutting edge by shaving off the burr pieces Characterized in that it comprises a step of forming a cutting edge on both sides of the ridge line of the ground surface of the cutting edge, the manufacturing method of the surgical suturing needle. 8. The surgical blade according to claim 7, wherein the cutting edge is formed on a ridge on both sides of the grinding surface and a single ridge formed on a tip of the trapezoidal bar. Manufacturing method of suture needle.