CN115106651A - Anchor hole connecting method of blood vessel stitching instrument - Google Patents

Abstract

The invention provides an anchor hole connecting method of a blood vessel stitching instrument, the blood vessel stitching instrument comprises a line pressing joint sleeve and a stitching line, the line pressing joint sleeve is cylindrical, and an anchor hole is formed inside the line pressing joint sleeve; the anchor hole connecting method comprises the following steps: cutting at least three gaps at one end of a wire pressing joint sleeve to enable the sum of circumferential sizes of the cut end part of the wire pressing joint sleeve to be matched with the outer diameter of a suture line; step two, one end of the suture is penetrated in the anchor hole from the notch end of the wire pressing joint sleeve; step three, extruding and shaping each opening on the wire pressing joint sleeve into a seam by using a sleeve positioning piece; and step four, welding the seam, and removing the sleeve positioning piece after welding to complete the anchor hole connection of the blood vessel stitching instrument. The anchor hole connecting method can effectively ensure good connection firmness of the anchor hole and the suture line, and the notch formed by the anchor hole is relatively simple to process, controllable in actual connection operation process and easy to operate.

Description

Anchor hole connection method for vascular stapler

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a method for connecting anchor holes of a vascular stapler.

Background technique

Vascular stapler is a hemostatic device after interventional surgery. In recent years, it has been favored by medical institutions due to its obvious hemostatic effect, easy operation, and small side effects. Among them, the reliability of the key component of the vascular suture - the anchor hole pressing line component is the key point of the technology. Because of its small parts, the material of the suture is polytetrafluoroethylene, the friction coefficient is small, the processing is difficult, and the connection Strength is not easy to guarantee.

At present, in order to solve the problem of reliable connection between the anchor hole and the suture, the anchor hole connection methods of the vascular stapler mainly include the direct extrusion method, the adhesive extrusion method and the heat-seal hook extrusion method. Among them, the direct extrusion method In order to pass the polytetrafluoroethylene suture to the crimping end of the anchor hole and connect it by extrusion, because the polytetrafluoroethylene suture is a bulky body and the material is relatively slippery, it is difficult to achieve the ideal connection strength. There is a defect of poor connection between the anchor hole and the suture; the adhesive extrusion method is to glue the polytetrafluoroethylene suture and pass it to the crimping end of the anchor hole, and then connect the two by extrusion. The contact surface of the adhesive is small, and the effect of improving the connection between the anchor hole and the suture is not obvious. At the same time, due to the use of chemical adhesives, it is easy to cause the risk of compatibility between chemicals and organisms; The hook heat-sealing extrusion method is to use the teflon suture head to be heat-sealed and then penetrate the anchor hole and press the end of the line, and then use the barb formed by the anchor hole to squeeze into the line, and use a pure physical method to squeeze and connect, but the anchor The barb formed by the hole is difficult to process, and the size of the heat-sealed head of the PTFE suture is difficult to control. If the heat-sealing size is large, the anchor hole cannot be entered. If the heat-sealing size is small, the barb cannot be squeezed into the thread. Inside.

Therefore, it is necessary to provide an improved technical solution for the deficiencies of the above-mentioned prior art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for connecting an anchor hole of a vascular stapler, so as to solve the problems of poor connection firmness between the anchor hole and the suture and difficult actual connection.

In order to achieve the above object, the present invention provides the following technical solutions:

A method for connecting an anchor hole of a vascular stapler, the vascular stapler comprises a wire-pressing joint sleeve and a suture, the pressing-wire joint sleeve is cylindrical, and an anchor hole is arranged inside;

The anchor hole connection method includes the following steps:

Step 1, at least three gaps are cut at one end of the wire crimping joint sleeve, so that the sum of the circumferential dimensions of the cut rear end of the crimping joint sleeve is matched with the outer diameter of the suture;

Step 2, thread one end of the suture into the anchor hole from the gap end of the crimping joint sleeve;

Step 3, using the sleeve positioning member to extrude and shape each gap on the sleeve of the crimping joint into a seam;

In step 4, the seam is welded, and after the welding is completed, the sleeve positioning member is removed to complete the connection of the anchor hole of the vascular stapler.

Optionally, the sleeve positioning member includes a connected positioning section and a shaping section, the positioning section is provided with a positioning hole, the shaping section is provided with a shaping hole, and the positioning hole is connected with the shaping hole. The positioning hole is a cylindrical hole, the radial size of the positioning hole is matched with the outer diameter size of the pressure line joint sleeve, and the radial size of the positioning hole is along the direction away from the positioning hole. direction gradually decreases;

Step 3 is specifically as follows: passing the cut end of the wire crimping joint sleeve through the positioning hole and the shaping hole in sequence, and at least partially exposed to the shaping section, and each cut on the cut end of the crimping joint sleeve is at the end of the shaping section. Under the action, it is extruded and shaped into a seam;

The fourth step is specifically: welding the exposed seam of the shaping section, and after the welding is completed, push out the sleeve positioning member to complete the connection of the anchor holes of the vascular stapler.

Optionally, in step 3, the length of the exposed portion of the cut end of the crimping joint sleeve is 1/3-1/2 of the length of the cut.

Optionally, the sleeve positioning member further includes a guide section, the guide section is connected to an end of the positioning section away from the sizing section, the guide section is provided with a guide hole communicating with the positioning hole, and the guide section is The radial dimension of the hole gradually increases in the direction away from the positioning hole;

Step 3 is specifically as follows: pass the cut end of the wire crimping joint sleeve through the guide hole, the positioning hole and the shaping hole in sequence, and at least partially expose it to the shaping section, and each cut on the cut end of the crimping joint sleeve is in the Under the action of the shaping section, it is extruded and shaped into a seam.

Optionally, in step 3, during the movement of the cut end of the wire crimping joint sleeve, when the other end of the wire crimping joint sleeve is flush with the end of the guide section away from the positioning section, Stop the threading movement of the crimping joint sleeve.

Optionally, the outer diameters of the guide section, the positioning section and the shaping section are the same, and the guide section, the positioning section and the shaping section are integral structures.

Optionally, in step 2, the length of the control suture passing through the anchor hole is greater than the length of the notch.

Optionally, the material of the wire-pressing joint sleeve is stainless steel, and in step 1, the gaps are cut by laser; the number of the gaps is 3-6, which are evenly distributed along the circumference of the wire-pressing joint sleeve, And each gap has the same size.

Optionally, the size of each of the gaps along the length direction of the crimping joint sleeve is not greater than 1/2 of the total length of the crimping joint sleeve, and the length of the suture thread is not greater than all 1/2 of the total length of the crimping joint sleeve.

Optionally, the outer diameter of the wire crimping joint sleeve is 0.45-0.55mm, and the wall thickness is 0.045-0.055mm.

Beneficial effects:

In the method for connecting the anchor holes of the vascular stapler of the present invention, at least three notches are first cut at one end of the sleeve of the pressure line joint, so that the sum of the circumferential dimensions of the cut rear end of the sleeve of the pressure line joint is the same as the outer diameter of the suture. Fitting; then, pass one end of the suture from the open end of the crimping joint sleeve into the anchor hole, and then use the sleeve positioning piece to extrude each notch on the crimping joint sleeve to form a joint. After the welding is completed, the welding end of the pressure line joint sleeve just presses the suture line, so that the connection between the anchor hole and the suture line can be realized; finally, the sleeve positioning part can be removed. The anchor hole connection method of the present invention can effectively ensure good connection firmness of the anchor hole and the suture, and the processing of the gap formed by the anchor hole is relatively simple, and the actual connection operation process is controllable and easy to operate.

Description of drawings

The accompanying drawings forming a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation of the present invention. in:

1 is a schematic structural diagram of the pressure line joint sleeve in the vascular stapler of the present invention after cutting the gap;

FIG. 2 is a schematic structural diagram of threading a suture in an anchor hole according to the present invention;

Fig. 3 is the sectional structure schematic diagram of the sleeve positioning member of the present invention;

4 is a schematic structural diagram of the sleeve positioning member of the present invention extruding and shaping the gap on the wire-pressing joint sleeve into a seam;

FIG. 5 is a schematic structural diagram after the anchor holes of the vascular stapler of the present invention are connected.

Numerals in the figure: 1-Crimping joint sleeve; 11-Anchor hole; 12-Gap; 13-Seam; 2-Suture; 3-Sleeve positioning piece; 31-Locating segment; 311-Locating hole; 32- Forming section; 321 - Forming hole; 33 - Guide section; 331 - Guide hole.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art fall within the protection scope of the present invention.

The present invention will be described in detail below with reference to the embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

Aiming at the problems of poor connection between anchor holes and sutures in the prior art and difficult actual connection, the present invention provides an anchor hole connection method for a vascular stapler. The anchor hole connection method of the present invention can effectively ensure that the anchor holes and the suture are connected. The wire has good connection firmness, and the processing of the gap formed by the anchor hole is relatively simple, and the actual connection operation process is controllable and easy to operate.

As shown in FIG. 1 to FIG. 5 , the vascular stapler of the present invention includes a thread crimping joint sleeve 1 and a suture 2. The crimping joint sleeve 1 is cylindrical and has an anchor hole 11 inside, and the suture thread 2 is a The material is polytetrafluoroethylene, and the anchor hole connection method of the present invention includes the following steps:

Step 1 (see FIG. 1 ), cut at least three notches 12 at one end of the crimping joint sleeve 1 , so that the sum of the circumferential dimensions of the cut rear end of the crimping joint sleeve 1 is compatible with the outer diameter of the suture 2 In this way, it can be ensured that after the subsequent gap 12 is extruded and shaped into the seam 13, the inner diameter of its end is matched with the outer diameter of the suture 2, and the anchor hole 11 and the suture 2 can be firmly connected after the seam 13 is welded. .

In step 2 (see FIG. 2 ), one end of the suture 2 is inserted into the anchor hole 11 from the end of the notch 12 of the crimping joint sleeve 1 .

Step 3 (see FIG. 4 ), use the sleeve positioning member 3 to extrude each gap 12 on the wire crimping joint sleeve 1 to form a seam 13 .

Step 4 (see FIGS. 4 and 5 ), weld the seam 13 , and after the welding is completed, remove the sleeve positioning member 3 to complete the connection of the anchor hole 11 of the vascular stapler. Welding can be selected as laser welding, which is simple and firm to operate.

Since the sum of the circumferential dimensions of the cutting rear end of the crimping joint sleeve 1 is compatible with the outer diameter of the suture thread 2, after the welding is completed, the welded end of the crimping joint sleeve 1 just presses the suture thread 2, so that The connection between the anchor hole 11 and the suture 2 can be realized, and the connection firmness is good.

It should be noted that the notch 12 is located at one end of the crimping joint sleeve 1 and runs through its end face. The shape of the notch 12 may not be limited, as long as the sum of the circumferential dimensions of the cutting rear end of the crimping joint sleeve 1 and the suture The outer diameter of the thread 2 is adapted, and the open end of the notch 12 is extruded to form the seam 13 . After the seam 13 is welded, the anchor hole 11 and the suture thread 2 can be firmly connected.

In addition, the structural arrangement of the sleeve positioning member 3 is not limited herein, as long as the gap 12 can be extruded and shaped into the seam 13 .

As shown in FIG. 3 and FIG. 4 , in the specific embodiment of the present invention, the sleeve positioning member 3 is cylindrical, including a positioning section 31 and a shaping section 32 connected to each other. The positioning section 31 is provided with a positioning hole 311, and the shaping section 32 is provided with a shaping hole 321, the positioning hole 311 and the shaping hole 321 are communicated, the positioning hole 311 is a cylindrical hole, and the radial size of the positioning hole 311 is matched with the outer diameter of the wire crimping joint sleeve 1. The positioning of the crimping joint sleeve 1 is convenient for the subsequent operation of shaping the gap 12 into the seam 13; the radial size of the shaping hole 321 gradually decreases along the direction away from the positioning hole 311, that is, the shaping hole 321 is gradually tapered. A hole is used to position the gap 12 to form the seam 13 .

Step 3 is specifically as follows: pass the end of the cut 12 of the crimping joint sleeve 1 through the positioning hole 311 and the shaping hole 321 in turn, and at least partially expose it to the shaping section 32, and each cut on the cut end of the crimping joint sleeve 1 12 is extruded and shaped into the seam 13 under the action of the shaping section 32 .

Step 4 is specifically: welding the seam 13 exposed on the shaping section 32, and after the welding is completed, push out the sleeve positioning member 3 to complete the connection of the anchor hole 11 of the vascular stapler.

It can be understood that the taper angle of the conical shaping hole 321 is the same as the taper angle after welding the seam 13 end of the crimping joint sleeve 1 , so as to ensure that the gap 12 can be effectively extruded and shaped into the seam 13 .

Optionally, in step 3, the length of the exposed portion at the end of the notch 12 of the crimping joint sleeve 1 is 1/3-2/3 of the length of the notch 12 . That is, when the sleeve positioning member 3 is used to press and shape the gap 12 to form the seam 13, the end of the shaping section 32 of the sleeve positioning member 3 is located at 1/3-2/3 of the length of the gap 12 (for example, 1/3-2/3). /3, 1/2, 2/3 and the interval value between any two end points), which is convenient for the welding operation of the exposed seam 13, and can also ensure the firmness of the welding of the seam 13, thereby ensuring that the anchor hole 11 and the The connection firmness of suture 2.

Further, in the specific embodiment of the present invention, the sleeve positioning member 3 further includes a guide section 33, the guide section 33 is connected to the end of the positioning section 31 away from the shaping section 32, and the guide section 33 is provided with a guide hole 331 that communicates with the positioning hole 311. , the radial dimension of the guide hole 331 gradually increases in the direction away from the positioning hole 311 , that is, the guide hole 331 is a gradient hole, and the setting of the guide section 33 can facilitate the wire crimping joint sleeve 1 to be smoothly and quickly passed through the sleeve in the positioning member 3.

Step 3 is specifically as follows: passing the notch 12 of the wire crimping joint sleeve 1 through the guide hole 331 , the positioning hole 311 and the shaping hole 321 in sequence, and at least partially exposed to the shaping section 32 , and the notch of the crimping joint sleeve 1 . Each gap 12 on the end 12 is extruded and shaped into a seam 13 under the action of the shaping section 32 .

In the specific embodiment of the present invention, in step 3, during the movement of the end of the gap 12 of the wire crimping joint sleeve 1, when the other end of the wire crimping joint sleeve 1 and the end of the guide section 33 are away from the positioning section 31 When it is flush, stop the threading movement of the crimping joint sleeve 1 . In this way, the threading and moving process of the crimping joint sleeve 1 can be limited. When the other end of the crimping joint sleeve 1 is flush with the end of the guide section 33 away from the positioning section 31, the shaping section 32 is just right. The gap 12 can be shaped as the seam 13, and the length of the exposed portion of the seam 13 can be ensured to facilitate the welding operation.

In the specific embodiment of the present invention, the outer diameters of the guide section 33 , the positioning section 31 and the shaping section 32 are the same, and the guide section 33 , the positioning section 31 and the shaping section 32 are integrally formed. That is to say, the outer shape of the sleeve positioning member 3 is cylindrical, and the whole is an integral structure, which is convenient for processing and manufacturing, and can ensure the overall reliability of the sleeve positioning member 3, thereby ensuring that the gap 12 is shaped as the seam 13. reliability.

In the specific embodiment of the present invention, in step 2, the length of the control suture 2 passing through the anchor hole 11 is greater than the length of the gap 12 . Such an operation can ensure that the suture thread 2 has a certain penetration length, so that the connection firmness of the suture thread 2 and the anchor hole 11 is better.

In the specific embodiment of the present invention, the material of the wire crimping joint sleeve 1 is stainless steel, and in step 1, the gap 12 is formed by laser cutting.

Considering the processing cost of the opening 12 and the firmness of the connection between the opening 12 and the seam 13 after welding, the number of openings 12 should be appropriate, and optionally, the number of openings 12 is 3-6 (for example, 3 , 4, 5, or 6). When the gaps 12 are processed and manufactured, a plurality of gaps 12 are evenly distributed along the circumferential direction of the crimping joint sleeve 1, and each gap 12 has the same size, which is convenient for processing and production, and can effectively ensure that the gaps 12 are formed into seams. 13. The connection firmness with the suture 2 after welding.

Further, the size of each gap 12 along the length direction of the crimping joint sleeve 1 is not greater than 1/2 of the total length of the crimping joint sleeve 1 , and the thread length of the suture 2 is not greater than that of the crimping joint sleeve 1 . 1/2 of the total length. Such a design does not affect the subsequent operation of arranging other components (such as needles) in the crimping joint sleeve 1 .

The outer diameter of the suture 2 of the present invention is generally about 0.24mm, and the outer diameter of the crimping joint sleeve 1 is 0.45-0.55mm (such as 0.45mm, 0.47mm, 0.50mm, 0.52mm, 0.55mm and any value at both ends). The interval value between), the wall thickness is 0.045-0.055mm (such as 0.045mm, 0.047mm, 0.050mm, 0.052mm, 0.055mm and the interval value between any two end points). Such a design not only facilitates the processing and extrusion of the gap 12 , but also ensures that the gap 12 is formed into the seam 13 and has good connection firmness with the suture 2 after welding.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The anchor hole connecting method of the blood vessel stitching instrument is characterized in that the blood vessel stitching instrument comprises a wire pressing joint sleeve and a stitching wire, wherein the wire pressing joint sleeve is cylindrical, and an anchor hole is formed in the wire pressing joint sleeve;

the anchor hole connecting method comprises the following steps:

cutting at least three gaps at one end of a wire pressing joint sleeve to enable the sum of circumferential sizes of the cut end part of the wire pressing joint sleeve to be matched with the outer diameter of a suture line;

step two, one end of the suture is penetrated in the anchor hole from the notch end of the wire pressing joint sleeve;

step three, extruding and shaping each opening on the wire pressing joint sleeve into a seam by using a sleeve positioning piece;

and step four, welding the seam, and removing the sleeve positioning piece after welding to complete the anchor hole connection of the blood vessel stitching instrument.

2. The anchor eye connecting method of a blood vessel suture instrument as claimed in claim 1, wherein said sleeve positioning member comprises a positioning section and a shaping section which are connected, said positioning section is provided with a positioning hole, said shaping section is provided with a shaping hole, said positioning hole is communicated with said shaping hole, said positioning hole is a cylindrical hole, the radial dimension of said positioning hole is adapted to the outer diameter dimension of said wire crimping sleeve, and the radial dimension of said shaping hole is gradually reduced along the direction departing from said positioning hole;

the third step is specifically as follows: sequentially penetrating the opening end of the line pressing joint sleeve through the positioning hole and the shaping hole, and at least partially exposing the opening end of the line pressing joint sleeve to the shaping section, wherein each opening on the opening end of the line pressing joint sleeve is extruded and shaped into a joint under the action of the shaping section;

the fourth step is specifically as follows: and welding the joint exposed out of the shaping section, and pushing the sleeve positioning piece out after the welding is finished to finish the anchor hole connection of the blood vessel stitching instrument.

3. The anchor eye connecting method of a blood vessel suture instrument as claimed in claim 2, wherein in step three, the length of the exposed portion of the slit end of the crimp connector sleeve is 1/3-1/2 of the length of the slit.

4. The anchor eye connecting method of a blood vessel suturing device as claimed in claim 2, wherein the sleeve positioning member further comprises a guiding section connected to an end of the positioning section facing away from the shaping section, the guiding section being provided with a guiding hole communicating with the positioning hole, the guiding hole having a radial dimension gradually increasing in a direction facing away from the positioning hole;

the third step is specifically as follows: and the opening end of the wire pressing joint sleeve sequentially penetrates through the guide hole, the positioning hole and the shaping hole and is at least partially exposed out of the shaping section, and each opening on the opening end of the wire pressing joint sleeve is extruded and shaped into a joint under the action of the shaping section.

5. The anchor eye connecting method of a blood vessel suturing device as claimed in claim 4, wherein in step three, during the passing movement of the slit end of the crimp sleeve, when the other end of the crimp sleeve is flush with the end of the guide section facing away from the positioning section, the passing movement of the crimp sleeve is stopped.

6. The anchor eye connecting method of a blood vessel suture instrument as claimed in claim 4, wherein said guide section, said positioning section and said shaping section have the same outer diameter, and said guide section, said positioning section and said shaping section are of an integral structure.

7. The anchor eye connecting method of a vascular suturing device as claimed in claim 1, wherein in the second step, the length of the suture thread inserted into the anchor eye is controlled to be greater than the length of the gap.

8. The anchor eye connection method of a blood vessel suture instrument as claimed in claim 1, wherein the wire pressing joint sleeve is made of stainless steel, and in the first step, the notch is cut by laser;

the number of the gaps is 3-6, the gaps are uniformly distributed along the circumferential direction of the wire pressing joint sleeve, and the size of each gap is the same.

9. The method of claim 8, wherein each slit has a dimension along the length of the crimp sleeve of no more than 1/2 of the total length of the crimp sleeve, and the suture is threaded through a length of no more than 1/2 of the total length of the crimp sleeve.

10. The method for connecting the anchoring openings of the vascular suture instrument as claimed in any one of claims 1 to 9, wherein the crimp fitting sleeve has an outer diameter of 0.45 to 0.55mm and a wall thickness of 0.045 to 0.055 mm.

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