JPS63294845A - Suture for operation and sutural needle equipped therewith - Google Patents

Abstract

PURPOSE:To prevent the damage of the tissue of a human body by elongating suture for operation by the sliding between the suture main body and a cylindrical body even when the growth of tissue is generated in a sutured part, by providing the cylindrical body made of a shrinkable resin having not only the projection of a sutural needle main body inserted therein on one end side thereof but also one end of the suture main body inserted therein on the other end side thereof end side thereof and generating sliding between the suture main body and the cylindrical body when the tension of a predetermined value or more is applied to the suture main body. CONSTITUTION:A cylindrical body 4 has such a characteristic that the inner diameter thereof is larger than the outer diameter of a projection 23 before heating and becomes smaller than the outer diameter of a suture main body 3 when said cylindrical body is shrunk by heating. When the inner diameter of the cylindrical body 4 is large before heating, the projection 23 of a sutural needle main body 2 is inserted in the cylindrical body 4 from one end 41 thereof and one end 31 of the suture main body 3 is inserted therein from the other end 42 thereof. Since the diameter shrinking ratio of the cylindrical body 4 is about 20%, the size of the initial inner diameter before shrinkage can be made sufficiently large. Therefore, when suture main body 3 is pulled by force of a predetermined value or more after a sutural needle 1A equipped with suture for operation is passed through an incised part, the suture main body 3 can be pulled off from the cylindrical body 4. That is, the sutural needle main body 2 and the suture main body 3 can be cut off without using scissors and the shortening of an operating time can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a surgical suture thread and a suture needle with a surgical suture thread, in which the surgical suture thread is attached to the needle base end in advance.

(Prior art) Conventional suture needles with suture threads for this type of surgery include
Some of these are disclosed in Japanese Utility Model Publication No. 12976 and Japanese Utility Model Publication No. 61-15898.

5 and 6 show a suture needle 18 with a surgical suture thread disclosed in the above-mentioned Japanese Utility Model Publication No. 12976/1983. In this suture needle with surgical suture thread 18, the suture needle main body 2
A cylindrical projection 23 is formed on the end surface 22 of the needle base end 21, and the projection 23 and one end 31 of the thread body 3 are wrapped and connected with the resin layer 6. This resin layer 6 is formed by injection molding. In detail, as shown in Figure 7,
The needle base end 21 and the thread body 3 are held between the molds 51 and 52, and the protrusion 23 and -:431 of the thread body 3 are placed in the cavity 53 having the same diameter as the needle base end 21 of the suture needle body 2. Keep it
Molten resin is injected from the runner 54 and solidified to form a resin layer 6.
is formed.

Also, Figures 9 and 10 are respectively from the above-mentioned Utility Model Publication Act 1986-15.
Suture needle with surgical suture thread disclosed in No. 898 Publication 1 b
, 1c is shown.

To be more specific, the suture needle body 2 of the surgical suture thread attachment needle 1b shown in FIG. They are connected by a cylindrical connector 7. This surgical suture needle 1b is manufactured as follows. That is, the inner diameter of the connector 7 is such that the protrusion 23 and the thread body 3 are
The outer diameter is larger than the outer diameter of the outer diameter, and the outer diameter is smaller than the outer diameter above the above-mentioned transformation temperature. Then, while keeping the connecting tool 7 below the transformation temperature, insert the protrusion 23 and -131 of the thread body 3 from both ends of the connecting tool 7, and then heat the connecting tool 7 above the transformation temperature to reduce the inner diameter. As a result, the protrusion 23 and the thread body 3 are connected.

Further, the suture needle 1c with surgical suture thread shown in FIG. 10 has the above-mentioned features in that the protrusion 23 of the suture needle body 2 and -yII 31 of the thread body 3 are connected via the shape memory alloy connector 8. The concept is basically the same as the threaded suture needle 1b shown in FIG. 9, but the difference is that the cross-sectional shape of the connector 8 is C-shaped.

Each of the above-mentioned conventional surgical suture needles 1 at 1 b,
When suturing an incision on a patient using an IC, after passing the suture needle with surgical suture thread 1 at 1 b, 1 c through the incision, the resin layer 6 side of each thread main body 3 or the connecting tool 7 is used.
Cut the ゜8 side with scissors and tie both ends of the thread body.

(Problems to be Solved by the Invention) However, each of the above-mentioned conventional surgical suture needles 11
It 1 b and 1 c each had the following drawbacks.

In the suture needle 1a with surgical suture thread disclosed in Japanese Utility Model Publication No. 12976/1983, there were various problems in the manufacturing process of the resin layer 6 by injection molding.

That is, the outer diameters of the suture needle body 2 and thread body 3 are extremely thin;
These ultra-fine suture needle bodies 2 and thread bodies 3 are molded into molds 51 and 52.
Therefore, it is technically extremely difficult to clamp the material with an appropriate holding force. In particular, the sizes of the gripping parts of the molds 51 and 52 for the thread body 3 are too small compared to the thread body 3, and the thread body 3
If the thread body 3 is pinched with more force than necessary, damage will occur to the thread body 3, and conversely, if the size of the gripping portion is too large compared to the thread body 3, the thread body 3 may be pinched with less force than necessary. If the thread body 3 is loosely held between the thread bodies 3 and 53, there is a problem that the thread body 3 may jump out of the molds 51, 52 due to the pressure when the molten resin is injected into the cavity 53.

Furthermore, the inner diameter of the cavity 53 is equal to the needle base end 2 of the suture needle body 2.
The date 55 for injecting the molten resin from the runner 54 into the cavity 53 is even thinner. 1. For example, when the outer diameter of the needle base end 21 is 0.2 mm, the date 55 is about 0.05 ml11.

Therefore, it was difficult to control the molten resin to a good flow state, and molding defects were likely to occur.

Furthermore, when the molten resin is injected, one end 31 of the thread body 3 placed in the cavity 53 is bent due to the injection pressure, and as shown in FIG. There were times when layer 6 was exposed. This created a problem of poor appearance and reduced product value.

Furthermore, if the resin layer 6 can be successfully injection molded, it is necessary to remove the runner 54. However, if the removal of the runner 54 is incomplete and the incision is sutured using the surgical suture needle 1a where the resin layer 6 is not finished smoothly, the resin layer 6 may damage human tissue. There was a risk that he might do so.

On the other hand, No. 9 disclosed in Utility Model Publication No. 61-15898
In the illustrated suture needle with surgical suture thread 1b, since the connector 7 has a cylindrical shape, the post-shrinkage rate of the connector 7 can only be about 1%. Therefore, if the thread main body 3 is a so-called multifilament thread made by twisting a plurality of threads, the thread main body 3 will swell and its outer diameter will increase, making it almost impossible to insert it into the connector 7. Ta.

In addition, the suture needle IC with surgical suture thread shown in FIG.
By having a C-shaped cross-section, the connector 8
Although the diameter shrinkage rate of the connector 8 is greatly reduced, and as a result, the thread body 3 becomes easier to insert and the above-mentioned drawbacks are resolved, the thread body 3 is exposed through the crack 81 of the connector 8 when the connector 8 contracts. Not only does this result in an unsightly appearance, but also there is a risk that the crack 81 may damage human tissue when the incision is sutured.

In addition, suture needle with suture thread for each of the above surgical operations 1 at 16.1
c, the thread body 3 passed through the incision must be cut near the suture needle body 2 with scissors or the like before tying both ends. It was not desirable to do such work.

Further, since the conventional thread main body 3 that ties the incision part does not have elasticity, there is also a problem that the thread main body may damage human tissue when tissue grows at the sutured part.

(Means for Solving the Problems) This invention has been made to solve the above problems, and the gist of the first invention is that one end of the thread body is inserted into a cylinder made of shrinkable resin, A surgical suture characterized in that the cylinder is attached to one end of the thread body by its contraction force, and slippage occurs between the thread body and the cylinder due to tension of a predetermined value or more acting on the thread body. It's in the thread.

Further, the gist of the second invention is to include a thread main body, a suture needle main body having a protrusion formed on the end face of the needle, the protrusion of the suture needle main body being inserted into one end side, and one end of the thread main body being inserted into the other end side. It has an inserted cylinder made of a contractile resin, and both ends of the cylinder are attached to the protrusion of the suture needle body and one end of the thread body, respectively, by the contraction force of the cylinder, and a predetermined value that acts on the thread body. This suture needle with surgical suture thread is characterized in that slippage occurs between the thread body and the cylindrical body due to the above tension.

(Function) Since the cylindrical body attached to one end of the thread body is made of a shrinkable resin such as a heat-shrinkable resin or an ultraviolet shrinkable resin, the diameter shrinkage rate of this cylindrical body can be set to about 20%. can. Therefore, the inner diameter of the cylindrical body before contraction can be increased, and one end of the thread body or the protrusion of the suture needle body can be easily inserted into the cylindrical body.

After one end of the thread body and the protrusion of the suture needle body are inserted,
The barrel is contracted, and the contraction force causes each end of the barrel to attach to one end of the thread body or to a protrusion of the suture needle body.

Furthermore, if a tension of more than a predetermined value is applied to the thread body, slippage will occur when the thread body and the barrel open. Even when the main body is removed or tissue growth occurs in the suture after the surgical suture is tied at the incision, the surgical suture becomes longer due to the slippage, causing damage to human tissue. Prevented.

(Example) Hereinafter, an example of the present invention will be described based on the drawings of FIGS. 1 and 2.

The suture needle IA with a surgical suture thread has a suture needle body 2, a thread body 3, and a cylindrical body 4.

The suture needle main body 2 is similar to the conventional one, and a cylindrical projection 23 extends from an end surface 22 of the needle base end 21 concentrically with the needle base end 21. The outer diameter of this protrusion 23 is smaller than the outer diameter of the needle base end 21.

The -431 end face of the thread body 3 is in contact with the end face of the projection 23. The outer diameter of the thread body 3 is the above-mentioned protrusion.

The outer diameter is slightly smaller than the outer diameter of No.23.

The protrusion 23 and one end 31 of the thread body 3 are made of heat-shrinkable Teflon (
(Product name) It is externally fitted and connected to a cylindrical body 4 made of resin. The outer diameter of one end 41 of the cylindrical body 40 fitted onto the projection 23 is equal to or slightly smaller than the outer diameter of the needle base end 21 of the suture needle body 2. In this embodiment, the thread body 3 and the cylindrical body 4 constitute a surgical suture thread.

The cylindrical body 4 was installed in the following manner. The cylindrical body 4 has the property that its inner diameter is larger than the outer diameter of the protrusion 23 before heating, and when heated, it contracts and becomes smaller than the outer diameter of the thread body 3.

Therefore, when the inner diameter of the cylinder 4 is large before heating, the protrusion 23 of the suture needle body 2 is inserted from the one end 41 side of the cylinder 4, and the one end 31 of the thread body 3 is inserted from the other end 42 side. Then, with the end surface of the protrusion 23 and the end surface of the one end 31 of the thread main body 3 in contact with each other, and the end surface of the one end 41 of the cylinder 4 in contact with the needle base end surface 22 of the suture needle main body 2, the cylindrical body 4 is heated and contracted, and the contraction force causes the protrusion 23 and the thread body 3 to
It is fixed to one end 31 of. As a result, the suture needle main body 2 and the thread main body 3 are connected via the cylindrical body 4.

Since the diameter contraction rate of the cylinder 4 is about 20%, the initial inner diameter before contraction can be made sufficiently large, and the protrusion 23 and the thread body 3 can be easily inserted.

The radial contraction rate of the cylindrical body 4 and the initial inner diameter of the cylindrical body 4 before contraction are appropriately selected. body 4-
141, and one end 31 of the thread main body 3.
is set so as to cause slippage within the cylinder body 4 and other parts of the yII 42.

Therefore, after passing the surgical suture needle IA through the incision, if the thread body 3 is pulled with a force equal to or greater than the predetermined value,
The thread body 3 can be pulled out from the cylinder body 4. That is, the suture needle main body 2 and the thread main body 3 can be separated without using scissors as in the conventional case, and the surgical time can be shortened.

Note that the tension of the above predetermined value is greater than the tension generated in the thread body 3 when the suture needle IA with surgical suture thread passes through the incision, so the thread body 3 will not come off from the barrel 4 during suturing. .

In addition, since the suture needle IA with surgical suture thread has a diameter that is the same or gradually decreases as it advances from the needle base end 21 in the three directions of the thread body, it can be inserted through an incision without getting caught in human tissue. can do.

Furthermore, since the cylinder body 4 has flexibility, even if the thread body 3 is pulled in any direction with respect to the suture needle body 2, the cylinder body 4 has a curvature and bends flexibly, and the cylinder body 4 and This prevents the thread body 3 from breaking at the connecting portion.

FIG. 3 shows a suture needle IB with a surgical suture thread according to another embodiment. The same parts as those in the first embodiment described above are given the same reference numerals and explanations are omitted, and the differences will be explained below. explain.

In this surgical suture needle IB, the length of one end 31 of the thread body 3 covered by the other end 42 of the cylinder body 4 is longer than that of the first embodiment.

In addition, the diameter contraction rate of the cylinder 4 and the initial inner diameter of the cylinder 4 before contraction are appropriately selected, and when the suture needle body 2 and the cylinder 4 are pulled by a predetermined value or more, the suture is removed from the cylinder 4. It is set so that when the protrusion 23 of the needle body 2 is detached and a tension equal to or higher than another predetermined value is applied to the thread body 3, the thread body 3 can slide inside the cylinder body 4 and other parts 442. has been done.

Also, the end surface of the protrusion 23 of the suture needle body 2 and the one end 3 of the thread body 3
The end surfaces of the tube 4 are separated from each other, and the tube 4 has a tube between one end 41 of the tube 4 covered by the protrusion 23 and the other end 42 of the tube 4 covered by the one end 31 of the thread body 3. A portion 43 is formed.

FIG. 4 shows a case where an incision is sutured using the surgical suture thread-attached suture needle IB, and this will be explained.

The suture needle IB with surgical suture thread is inserted into the incision 91 of the human tissue 90.
After passing through the suture needle body 2, the suture needle body 2 is first removed from the cylindrical body 4. Next, the tube portion 43 of the cylinder body 4 and the thread body 3 are tied together to form a loop. By suturing in this way, even if a tension exceeding the predetermined value is applied to the thread body 3 due to tissue growth or the like, the thread body 3 will slip within the pond MIi 42 of the cylinder body 4 as described above. , since the thread body 3 is pulled out and the loop length is extended, the thread body 3 may break,
The thread body 3 prevents the human tissue 90 from being damaged.6 Note that the other end 42 of the cylindrical body 4 of the surgical suture needle IA of the embodiment shown in FIG. It goes without saying that the other end 42 of the cylindrical body 4 in the surgical suture needle IB of the embodiment may be made longer.

This invention is not limited to the above-mentioned embodiments, and various embodiments are possible. For example, the cylindrical body may be made of an ultraviolet shrinkable resin that absorbs ultraviolet light and shrinks.

(Effects of the Invention) As described above, according to the present invention, since the cylinder is made of a shrinkable resin and has a high scraping shrinkage ratio, the inner diameter of the cylinder before shrinkage can be increased. As a result, one end of the thread body or the protrusion of the suture needle body can be easily inserted into the cylindrical body before contraction.

Furthermore, the cylinder is attached to the thread body by its contraction force, and if a tension exceeding a predetermined value is applied, the thread body and the cylinder will slip when opened. After passing the needle through the incision, the thread body can be removed from the barrel. Furthermore, since the surgical suture is stretched after it is tied at the incision, damage to human tissue can be prevented even when tissue growth occurs at the suture.

[Brief explanation of drawings]

The drawings in FIGS. 1 and 2 show a first embodiment of the present invention, and FIG. 1 is an external front view of a suture needle with a surgical suture thread, and FIG. 2 is an enlarged sectional view of the main part. . FIG. 3 is a sectional view of the main part of the second embodiment, and FIG. 4 is a sectional view of the same mode of use. In addition, FIG. 5 is a front view of a conventional suture needle with surgical suture thread corresponding to FIG. 1, and FIGS. 6 and 8 are enlarged sectional views of the same essential parts, respectively.
FIG. 7 is a schematic explanatory diagram of the manufacturing process. FIG. 9 is a cross-sectional view of main parts of another conventional surgical suture needle with suture thread, and FIG.
The figure is an assembled perspective view of still another conventional suture needle with surgical suture thread. IA, IB...Suture needle with surgical suture thread, 2...Suture needle body, 3...Thread body, 4...Cylinder body, 22...
・Needle base end face, 23...Protrusion.

Claims (2)

[Claims] (1) One end of the thread body is inserted into a cylinder made of shrinkable resin,
A surgical suture characterized in that the cylinder is attached to one end of the thread body by its contraction force, and slippage occurs between the thread body and the cylinder due to tension of a predetermined value or more acting on the thread body. thread. (2) A thread body, a suture needle body with a protrusion formed on the end face of the needle, and a shrinkable resin material with the protrusion of the suture needle body inserted into one end and one end of the thread body inserted into the other end. The ends of the cylinder are attached to the protrusion of the suture needle body and one end of the thread body, respectively, by the contraction force thereof, and the thread body is attached to the thread body by a tension of a predetermined value or more acting on the thread body. A surgical suture needle with a suture thread, characterized in that slippage occurs between the needle and the cylindrical body.