Anchor hole connection method for vascular suturing device

Abstract

The present invention provides an anchor hole connection method for a vascular suture device, wherein the vascular suture device includes a wire joint sleeve and a suture, wherein the wire joint sleeve is cylindrical and has an anchor hole inside; the anchor hole connection method includes the following steps: step 1, cutting at least three notches at one end of the wire joint sleeve so that the sum of the circumferential dimensions of the cut rear end of the wire joint sleeve matches the outer diameter of the suture; step 2, passing one end of the suture through the notched end of the wire joint sleeve into the anchor hole; step 3, using a sleeve positioning piece to squeeze and shape each notch on the wire joint sleeve into a seam; step 4, welding the seam, and after welding is completed, removing the sleeve positioning piece to complete the anchor hole connection of the vascular suture device. The anchor hole connection method of the present invention can effectively ensure good connection firmness between the anchor hole and the suture, and the processing of the notch formed by the anchor hole is relatively simple, and the actual connection operation process is controllable and easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an anchor hole connection method for a vascular suturing device. Background Art

[0002] Vascular suture devices are used to stop bleeding after interventional surgery. In recent years, they have become popular among medical institutions due to their significant hemostatic effects, ease of use, and minimal side effects. However, the reliability of the anchor hole and wire crimping assembly, a key component of vascular suture devices, is a key technical challenge. Due to its small size and the low friction coefficient of the suture made of polytetrafluoroethylene (PTFE), processing is difficult, and ensuring connection strength is challenging.

[0003] 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 suture device mainly include direct extrusion method, adhesive extrusion method and anti-retraction hook heat-sealing extrusion method. Among them, the direct extrusion method is to pass the polytetrafluoroethylene suture through the pressure end of the anchor hole and connect it by extrusion. Since the polytetrafluoroethylene suture is an expanded body and the material is slippery, it is difficult to achieve the ideal connection strength, and there is a defect of poor connection firmness between the anchor hole and the suture; the adhesive extrusion method is to glue the polytetrafluoroethylene suture through the pressure end of the anchor hole and then connect the two by extrusion. The contact surface is small, and the effect on improving the firmness of 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 very easy to cause the compatibility risk of chemicals and organisms; the stop hook heat sealing extrusion method is to use the polytetrafluoroethylene suture head to heat seal and then insert it into the anchor hole pressing end, and then use the barb formed by the anchor hole to squeeze into the line, and use a purely physical method to extrude and connect, but the barb formed by the anchor hole is difficult to process, and the size of the heat seal of the polytetrafluoroethylene suture head is difficult to control. If the heat seal size is large, it cannot enter the anchor hole. If the heat seal size is small, the barb cannot be squeezed into the line.

[0004] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0005] The object of the present invention is to provide a method for connecting an anchor hole of a vascular suture device, so as to solve the problem that the connection between the anchor hole and the suture thread is poor in firmness and difficult in actual connection.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for connecting an anchor hole of a vascular suture device, wherein the vascular suture device comprises a wire-pressing joint sleeve and a suture thread, wherein the wire-pressing joint sleeve is cylindrical and has an anchor hole therein;

[0008] The anchor hole connection method comprises the following steps:

[0009] Step 1: cutting at least three notches on one end of the crimping connector sleeve so that the sum of the circumferential dimensions of the cut rear end of the crimping connector sleeve matches the outer diameter of the suture;

[0010] Step 2: Pass one end of the suture thread through the notch end of the crimping connector sleeve into the anchor hole;

[0011] Step 3: Use the sleeve positioning piece to squeeze and shape each notch on the wire connector sleeve into a seam;

[0012] Step 4: Weld the seam. After welding is completed, remove the sleeve positioning piece to complete the anchor hole connection of the vascular suture device.

[0013] Optionally, the sleeve positioning member includes a positioning section and a shaping section connected to each other, the positioning section is provided with a positioning hole, the shaping section is provided with a shaping hole, the positioning hole and the shaping hole are connected, the positioning hole is a cylindrical hole, the radial dimension of the positioning hole is adapted to the outer diameter of the wire connector sleeve, and the radial dimension of the shaping hole gradually decreases in a direction away from the positioning hole;

[0014] Step three is specifically as follows: the notched end of the wire connector sleeve is passed through the positioning hole and the shaping hole in sequence, and at least partially exposed to the shaping section, and each notch on the notched end of the wire connector sleeve is squeezed and shaped into a seam under the action of the shaping section;

[0015] Step 4 is specifically as follows: welding the seam exposed in the shaping section, and after welding is completed, pushing out the sleeve positioning piece to complete the anchor hole connection of the vascular suture device.

[0016] Optionally, in step three, the length of the exposed portion of the notch end of the wire connector sleeve is 1 / 3-1 / 2 of the notch length.

[0017] Optionally, the sleeve positioning member further comprises a guide section, the guide section being connected to an end of the positioning section away from the shaping section, a guide hole communicating with the positioning hole being provided in the guide section, and a radial dimension of the guide hole gradually increasing in a direction away from the positioning hole;

[0018] Step three is specifically as follows: the notched end of the wire connector sleeve is passed through the guide hole, the positioning hole and the shaping hole in sequence, and at least partially exposed to the shaping section. Each notch on the notched end of the wire connector sleeve is squeezed and shaped into a seam under the action of the shaping section.

[0019] Optionally, in step three, during the threading movement of the notched end of the wire crimping connector sleeve, when the other end of the wire crimping connector sleeve is flush with the end of the guide section away from the positioning section, the threading movement of the wire crimping connector sleeve is stopped.

[0020] 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 an integral structure.

[0021] Optionally, in step 2, the length of the suture thread passing through the anchor hole is controlled to be greater than the length of the notch.

[0022] Optionally, the material of the wire connector sleeve is stainless steel, and in step one, the notches are formed by laser cutting; the number of the notches is 3-6, which are evenly distributed along the circumference of the wire connector sleeve, and each notch has the same size.

[0023] Optionally, the dimension of each notch along the length direction of the wire crimping joint sleeve is no greater than 1 / 2 of the total length of the wire crimping joint sleeve, and the threading length of the suture thread is no greater than 1 / 2 of the total length of the wire crimping joint sleeve.

[0024] Optionally, the outer diameter of the wire crimping connector sleeve is 0.45-0.55 mm, and the wall thickness is 0.045-0.055 mm.

[0025] Beneficial effects:

[0026] The anchor hole connection method of the vascular suture device of the present invention first cuts at least three notches at one end of the wire connector sleeve so that the sum of the circumferential dimensions of the cut rear end of the wire connector sleeve matches the outer diameter of the suture; then, one end of the suture is inserted into the anchor hole from the notched end of the wire connector sleeve; thereafter, a sleeve positioning piece is used to squeeze and shape each notch on the wire connector sleeve into a seam, and the seam is welded. After welding is completed, the welding end of the wire connector sleeve just presses the suture, thereby realizing the connection between the anchor hole and the suture; finally, the sleeve positioning piece is removed. The anchor hole connection method of the present invention can effectively ensure a good connection firmness between the anchor hole and the suture, and the notch formed by the anchor hole is relatively simple to process, and the actual connection operation process is controllable and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. Among them:

[0028] Figure 1 This is a schematic structural diagram of the pressure wire connector sleeve in the vascular suture device of the present invention after the notch is cut;

[0029] Figure 2 This is a schematic diagram of the structure of inserting the suture thread into the anchor hole of the present invention;

[0030] Figure 3 Schematic diagram of the cross-sectional structure of the sleeve positioning member of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the sleeve positioning member of the present invention for squeezing and shaping the notch on the wire connector sleeve into a seam;

[0032] Figure 5 This is a schematic structural diagram of the vascular suture device of the present invention after the anchor holes are connected.

[0033] Numbers in the figure: 1-wire connector sleeve; 11-anchor hole; 12-notch; 13-seam; 2-suture line; 3-sleeve positioning piece; 31-positioning section; 311-positioning hole; 32-forming section; 321-forming hole; 33-guide section; 331-guide hole. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0035] The present invention will be described in detail below with reference to the embodiments. It should be noted that the embodiments and features of the embodiments of the present invention can be combined with each other without conflict.

[0036] In response to the problems in the prior art of poor connection firmness between the anchor hole and the suture thread and difficulty in actual connection, the present invention provides an anchor hole connection method for a vascular suture device. The anchor hole connection method of the present invention can effectively ensure good connection firmness between the anchor hole and the suture thread, and the processing of the notch formed by the anchor hole is relatively simple. The actual connection operation process is controllable and easy to operate.

[0037] like Figures 1 to 5 As shown, the vascular suture device of the present invention includes a crimping connector sleeve 1 and a suture 2. The crimping connector sleeve 1 is cylindrical and has an anchor hole 11 therein. The suture 2 is made of polytetrafluoroethylene. The anchor hole connection method of the present invention includes the following steps:

[0038] Step 1 (see Figure 1 ), cut at least three notches 12 at one end of the wire connector sleeve 1, so that the sum of the circumferential dimensions of the rear end portion of the wire connector sleeve 1 is adapted to the outer diameter of the suture 2, so that after the subsequent notches 12 are extruded and formed into the seam 13, the inner diameter of the end portion is adapted to the outer diameter of the suture 2, and after the seam 13 is welded, a firm connection between the anchor hole 11 and the suture 2 can be achieved.

[0039] Step 2 (see Figure 2 ), one end of the suture thread 2 is passed through the notch 12 end of the wire connector sleeve 1 and inserted into the anchor hole 11.

[0040] Step 3 (see Figure 4 ), each notch 12 on the crimping connector sleeve 1 is squeezed and shaped into a seam 13 using a sleeve positioning member 3.

[0041] Step 4 (see Figure 4 and Figure 5 ), weld the seam 13, and after welding is completed, remove the sleeve positioning member 3 to complete the connection of the anchor hole 11 of the vascular suture device. Laser welding can be selected, which is simple to operate and relatively strong.

[0042] Since the sum of the circumferential dimensions of the cut rear end of the wire crimping joint sleeve 1 matches the outer diameter of the suture 2, after welding is completed, the welding end of the wire crimping joint sleeve 1 just presses the suture 2, so that the connection between the anchor hole 11 and the suture 2 can be achieved, and the connection is firm.

[0043] It should be noted that the notch 12 is located at one end of the wire connector sleeve 1 and passes through its end face. The shape of the notch 12 can be not limited, as long as the sum of the circumferential dimensions of the rear end of the wire connector sleeve 1 is matched with the outer diameter of the suture 2, and the open end of the notch 12 is extruded and formed into a seam 13, after welding the seam 13, a firm connection between the anchor hole 11 and the suture 2 can be achieved.

[0044] In addition, the structure of the sleeve positioning member 3 is not limited here, as long as it can extrude and shape the notch 12 into the seam 13.

[0045] like Figure 3 and Figure 4 As shown, in a specific embodiment of the present invention, the sleeve positioning member 3 is cylindrical, comprising a positioning section 31 and a shaping section 32 connected to each other, a positioning hole 311 is provided in the positioning section 31, and a shaping hole 321 is provided in the shaping section 32, the positioning hole 311 and the shaping hole 321 are connected, the positioning hole 311 is a cylindrical hole, and the radial dimension of the positioning hole 311 is adapted to the outer diameter dimension of the wire connector sleeve 1 to position the wire connector sleeve 1, which is convenient for the subsequent shaping of the notch 12 into the seam 13; the radial dimension of the shaping hole 321 gradually decreases in the direction away from the positioning hole 311, that is, the shaping hole 321 is a gradually tapered hole, which is used to position the notch 12 into the seam 13.

[0046] Step three is specifically as follows: the notch 12 end of the wire connector sleeve 1 is passed through the positioning hole 311 and the shaping hole 321 in sequence, and at least partially exposed to the shaping section 32. Each notch 12 on the notch end of the wire connector sleeve 1 is squeezed and shaped into a seam 13 under the action of the shaping section 32.

[0047] Step 4 specifically includes: welding the seam 13 exposed outside the shaping section 32 , and after welding is completed, pushing out the sleeve positioning member 3 to complete the connection of the anchor hole 11 of the vascular suture device.

[0048] It is understandable that the cone angle of the conical shaping hole 321 is the same as the cone angle of the seam 13 end of the wire connector sleeve 1 after welding, so as to ensure that the notch 12 can be effectively squeezed and shaped into the seam 13.

[0049] Optionally, in step three, the length of the exposed portion of the notch 12 of the wire connector 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 extrude and shape the notch 12 into 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 notch 12 (for example, 1 / 3, 1 / 2, 2 / 3, and an interval value between any two end points). This facilitates the welding operation of the exposed seam 13 and ensures the firmness of the welding of the seam 13, thereby ensuring the firmness of the connection between the anchor hole 11 and the suture 2.

[0050] Furthermore, in a specific embodiment of the present invention, the sleeve positioning member 3 also includes a guide section 33, which is connected to the end of the positioning section 31 away from the shaping section 32. A guide hole 331 connected to the positioning hole 311 is provided in the guide section 33. 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. The setting of the guide section 33 can facilitate the wire connector sleeve 1 to be smoothly and quickly inserted into the sleeve positioning member 3.

[0051] Step three is specifically as follows: the notch 12 end of the wire connector sleeve 1 is passed 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. Each notch 12 on the notch 12 end of the wire connector sleeve 1 is squeezed and shaped into a seam 13 under the action of the shaping section 32.

[0052] In a specific embodiment of the present invention, in step 3, during the threading movement of the notch 12 of the crimping connector sleeve 1, when the other end of the crimping connector sleeve 1 is flush with the end of the guide section 33 away from the positioning section 31, the threading movement of the crimping connector sleeve 1 is stopped. Such an operation can limit the threading movement process of the crimping connector sleeve 1. When the other end of the crimping connector sleeve 1 is flush with the end of the guide section 33 away from the positioning section 31, the shaping section 32 can just shape the notch 12 into the seam 13, and can ensure that the exposed length of the seam 13 is conducive to the welding operation.

[0053] In this embodiment of the present invention, the guide section 33, the positioning section 31, and the shaping section 32 have the same outer diameter and are integrally formed. In other words, the sleeve positioning member 3 is cylindrical in shape and integrally formed. This facilitates fabrication and ensures the overall reliability of the sleeve positioning member 3, thereby ensuring the reliable formation of the notch 12 into the seam 13.

[0054] In a specific embodiment of the present invention, in step 2, the length of the suture 2 inserted into the anchor hole 11 is controlled to be greater than the length of the notch 12. Such an operation can ensure that the suture 2 has a certain insertion length, so that the connection between the suture 2 and the anchor hole 11 is more secure.

[0055] In a specific embodiment of the present invention, the crimping connector sleeve 1 is made of stainless steel. In step 1, the notch 12 is formed by laser cutting.

[0056] Considering the processing and manufacturing cost of the notches 12 and the connection strength between the notches 12 formed into the seam 13 and the suture 2 after being welded, the number of notches 12 should be appropriate. Optionally, the number of notches 12 is 3-6 (for example, 3, 4, 5, or 6). During the processing and manufacturing of the notches 12, the multiple notches 12 are evenly distributed along the circumference of the wire connector sleeve 1, and each notch 12 has the same size. This is convenient for processing and manufacturing, and can effectively ensure the connection strength between the notches 12 formed into the seam 13 and the suture 2 after being welded.

[0057] Furthermore, the dimension of each notch 12 along the length direction of the crimping connector sleeve 1 is no greater than 1 / 2 of the total length of the crimping connector sleeve 1, and the length of the suture thread 2 passing through is no greater than 1 / 2 of the total length of the crimping connector sleeve 1. This design does not affect the subsequent operation of installing other components (such as a needle) in the crimping connector sleeve 1.

[0058] The outer diameter of the suture 2 of the present invention is generally about 0.24mm, the outer diameter of the wire connector sleeve 1 is 0.45-0.55mm (such as 0.45mm, 0.47mm, 0.50mm, 0.52mm, 0.55mm and the interval between any two end points), and the wall thickness is 0.045-0.055mm (such as 0.045mm, 0.047mm, 0.050mm, 0.052mm, 0.055mm and the interval between any two end points). Such a design is conducive to the processing and extrusion molding of the notch 12, and can also ensure that the notch 12 is formed into a seam 13 and the connection with the suture 2 is better after welding.

[0059] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for connecting an anchor hole of a vascular suture device, characterized in that: The vascular suturing device comprises a wire pressing joint sleeve and a suture thread, wherein the wire pressing joint sleeve is cylindrical and has an anchor hole inside; The anchor hole connection method comprises the following steps: Step 1: cutting at least three notches on one end of the crimping connector sleeve so that the sum of the circumferential dimensions of the cut rear end of the crimping connector sleeve matches the outer diameter of the suture; Step 2: Pass one end of the suture thread through the notch end of the crimping connector sleeve into the anchor hole; Step 3: Use the sleeve positioning piece to squeeze and shape each notch on the wire connector sleeve into a seam; Step 4: Weld the seam. After welding is completed, remove the sleeve positioning piece to complete the anchor hole connection of the vascular suture device; The sleeve positioning member includes a positioning section and a shaping section connected to each other, a positioning hole is provided in the positioning section, a shaping hole is provided in the shaping section, the positioning hole and the shaping hole are connected, the positioning hole is a cylindrical hole, the radial dimension of the positioning hole is adapted to the outer diameter of the crimping connector sleeve, and the radial dimension of the shaping hole gradually decreases in the direction away from the positioning hole; Step three is specifically as follows: the notched end of the wire connector sleeve is passed through the positioning hole and the shaping hole in sequence, and at least partially exposed to the shaping section, and each notch on the notched end of the wire connector sleeve is squeezed and shaped into a seam under the action of the shaping section; Step 4 is specifically as follows: welding the seam exposed in the shaping section, and after welding is completed, pushing out the sleeve positioning piece to complete the anchor hole connection of the vascular suture device; The sleeve positioning member further includes a guide section connected to an end of the positioning section away from the shaping section, wherein a guide hole communicating with the positioning hole is provided in the guide section, and a radial dimension of the guide hole gradually increases in a direction away from the positioning hole; Step three is specifically as follows: the notched end of the crimping connector sleeve is passed through the guide hole, the positioning hole and the shaping hole in sequence, and at least partially exposed to the shaping section, and each notch on the notched end of the crimping connector sleeve is squeezed and shaped into a seam under the action of the shaping section; 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 an integrated structure.

2. The anchor hole connection method of a vascular suture device according to claim 1, wherein: In step three, the length of the exposed portion of the notch end of the wire connector sleeve is 1 / 3-1 / 2 of the notch length.

3. The anchor hole connection method of a vascular suture device according to claim 1, wherein: In step three, during the threading movement of the notched end of the wire connector sleeve, when the other end of the wire connector sleeve is flush with the end of the guide section away from the positioning section, the threading movement of the wire connector sleeve is stopped.

4. The anchor hole connection method of a vascular suture device according to claim 1, wherein: In step 2, the length of the suture thread inserted into the anchor hole is controlled to be greater than the length of the notch.

5. The anchor hole connection method of a vascular suturing device according to claim 1, characterized in that: The material of the wire connector sleeve is stainless steel, and in step 1, the notch is formed by laser cutting; The number of the notches is 3-6, which are evenly distributed along the circumference of the wire crimping connector sleeve, and the size of each notch is the same.

6. The method for connecting an anchor hole of a vascular suture device according to claim 5, wherein: The dimension of each notch along the length direction of the wire crimping joint sleeve is no greater than 1 / 2 of the total length of the wire crimping joint sleeve, and the threading length of the suture thread is no greater than 1 / 2 of the total length of the wire crimping joint sleeve.

7. The anchor hole connection method of a vascular suture device according to any one of claims 1 to 6, characterized in that: The outer diameter of the crimping connector sleeve is 0.45-0.55 mm, and the wall thickness is 0.045-0.055 mm.

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