An anchor needle assembly for a vascular stapler

Abstract

The utility model provides a kind of anchor needle assembly of blood vessel suturing device, it is related to anchor needle assembly technical field, including anchor needle body and connecting pipe, the connecting pipe is assembled with the anchor needle body connection, suture is arranged in the connecting pipe, the anchor needle body includes front needle head, rear needle head and connecting section, the front needle head and rear needle head are respectively conical and round table structure setting, the rear needle head is assembled with front needle head end face connection, the rear needle head is assembled with the connecting pipe connection by connecting section, rear needle head inclination is greater than front needle head inclination, the waist groove for passing through suture is equipped in the lower of connecting pipe, multiple barbs are equipped in the connecting pipe inner wall, and the barb far from anchor needle body one end is rotatably connected with the connecting pipe inner wall.The utility model is equipped with multiple barbs in the connecting pipe inner wall, when suture is pulled in reverse direction, barb one end rotates and expands, and the tip of barb is hung on suture against the direction of suture separation, so that suture is difficult to separate.

Description

Technical Field

[0001] This utility model relates to the field of anchor needle assembly technology, and in particular to an anchor needle assembly for a vascular suture device. Background Technology

[0002] Vascular suture devices are hemostatic instruments used after interventional surgery. In recent years, vascular suture devices have become increasingly popular in medical institutions due to their significant hemostatic effect, ease of operation, and minimal side effects. The anchor needle assembly is a key component of vascular suture devices for achieving rapid suturing. Its main functions are to accurately puncture the vessel wall, stabilize the suture position, and enhance the strength of the anastomosis.

[0003] For example, according to CN219048673U, an anchor needle assembly for a vascular suture device includes an anchor needle, a syringe barrel, and a push pin. The anchor needle includes a connected anchor needle portion and an assembly portion. The assembly portion has a suture mounting hole for receiving the suture, and a suture protection opening on the side wall of the assembly portion. The suture protection opening penetrates the end face of the assembly portion away from the anchor needle portion, allowing the suture to enter the suture mounting hole through the suture protection opening. The inner cavity size of the syringe barrel is adapted to the outer diameter of the assembly portion, and a suture waist hole is opened on the side wall of the syringe barrel, communicating with the inner cavity of the syringe barrel for suture exit. The push pin is movably inserted into the syringe barrel, and one end of the push pin corresponding to the suture waist hole has a suture protection notch. The dimension of the end face of the push pin facing the suture protection notch is not greater than the dimension of the end face of the assembly portion away from the anchor needle portion. The above-mentioned anchor needle assembly can ensure the connection strength of the anchor needle, achieve a stable assembly connection between the anchor needle and the syringe barrel, and prevent damage to the suture during the anchor needle detachment process.

[0004] However, in the prior art, as shown in the aforementioned patent, the suture and anchor are installed by adhesive bonding. However, the adhesive bonding may fail due to the tension of the suture, or the erosion of blood or other bodily fluids during surgery, posing a risk of suture detachment. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the prior art, the operation of gluing sutures to anchor needles can easily cause the sutures to detach during surgery.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an anchor needle assembly for a vascular suture device, comprising an anchor needle body and a connecting tube, wherein the connecting tube is assembled and connected to the anchor needle body, and a suture thread is threaded through the connecting tube; the anchor needle body comprises a front needle head, a rear needle head, and a connecting section; the front needle head and the rear needle head are respectively arranged in a conical and a frustum-shaped structure; the rear needle head is assembled and connected to the end face of the front needle head; the rear needle head is assembled and connected to the connecting tube through the connecting section; the inclination angle of the rear needle head is greater than that of the front needle head; a waist groove for the suture thread to pass through is provided below the connecting tube; and multiple barbs are provided on the inner wall of the connecting tube, with the end of the barb away from the anchor needle body being rotatably connected to the inner wall of the connecting tube.

[0007] In a preferred embodiment, the angle between the side of the front needle tip and the perpendicular bisector is A, and the angle between the side of the rear needle tip and the perpendicular bisector is B. Angle A is less than angle B, angle A is 20 degrees, and angle B is 30 degrees. By setting the tip of the anchor needle body to a dual-angle structure, the puncture resistance at initial contact is reduced, and the penetration accuracy of the blood vessel wall is improved. After the front needle tip enters the blood vessel, the rear needle tip, due to its larger diameter, increases the resistance after entering the blood vessel, thus avoiding excessive puncture of the blood vessel by the needle tip.

[0008] In a preferred embodiment, the rear needle tip is provided with a protrusion on the side away from the front needle tip. There are multiple protrusions. After the needle tip punctures the blood vessel, the anchor needle body is fixed at the edge of the puncture hole to prevent the needle body from slipping off during subsequent operations.

[0009] In a preferred embodiment, the protrusion is provided as a micro-protrusion structure, and the length of the protrusion is 0.1-0.2 mm.

[0010] In a preferred embodiment, the connecting tube has an observation hole on one end of its sidewall facing the connecting section, which facilitates observation of the position of the suture thread inside the connecting tube.

[0011] In a preferred embodiment, the inner wall of the connecting pipe is provided with a plurality of mounting grooves, and a mounting bracket is provided in the mounting groove, with the barbs rotatably mounted on the mounting bracket.

[0012] In a preferred embodiment, the mounting bracket has a mounting groove on the side facing the barb that is adapted to the barb, and a spring is provided between the mounting groove and the barb. When the suture is pulled in the opposite direction, the barb enters the suture, the barb rotates and unfolds, and the suture is dislodged.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] This invention, during the installation of the suture and connecting tube, involves inserting one end of the suture into the connecting tube until it is visible through the observation hole. During the suturing process, the suture and connecting tube experience pulling. During this pulling, one end of the barb rotates and unfolds, with the tip of the barb hooking onto the suture against the direction of suture detachment, making it difficult for the suture to detach. Multiple barbs are provided to ensure the installation quality of the suture and connecting tube. By setting the tip of the anchor needle to a dual-angle structure, the initial puncture resistance is reduced, improving the penetration accuracy of the blood vessel wall. After the first needle enters the blood vessel, the second needle, due to its larger diameter, experiences increased resistance upon entering the vessel, preventing excessive puncture. Attached Figure Description

[0015] Figure 1 A perspective view of an anchor needle assembly for a vascular suture device provided by this utility model;

[0016] Figure 2 A schematic diagram of the connecting tube of the anchor needle assembly of a vascular suture device provided by this utility model;

[0017] Figure 3 A schematic diagram of the barb structure of the anchor needle assembly of a vascular suture device provided by this utility model.

[0018] Legend:

[0019] 1. Anchor needle body; 2. Connecting tube; 3. Suture thread; 4. Front needle head; 5. Rear needle head; 6. Connecting section; 7. Waist groove; 8. Barb; 9. Protrusion; 10. Observation hole; 11. Mounting groove; 12. Mounting bracket; 13. Assembly groove; 14. Spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution: an anchor needle assembly for a vascular suture device, including an anchor needle body 1 and a connecting tube 2. The connecting tube 2 is assembled and connected to the anchor needle body 1. A suture 3 is passed through the connecting tube 2. The anchor needle body 1 includes a front needle head 4, a rear needle head 5, and a connecting section 6. The front needle head 4 and the rear needle head 5 are respectively arranged in a conical shape and a frustum shape. The rear needle head 5 is assembled and connected to the end face of the front needle head 4. The rear needle head 5 is assembled and connected to the connecting tube 2 through the connecting section 6. The inclination angle of the rear needle head 5 is greater than that of the front needle head 4. A waist groove 7 for the suture 3 to pass through is provided below the connecting tube 2. A plurality of barbs 8 are provided on the inner wall of the connecting tube 2. The end of the barb 8 away from the anchor needle body 1 is rotatably connected to the inner wall of the connecting tube 2.

[0022] like Figure 1-3 As shown, the angle between the side of the front needle 4 and the perpendicular bisector is A, and the angle between the side of the rear needle 5 and the perpendicular bisector is B. Angle A is less than angle B, which is 20 degrees and angle B is 30 degrees. By setting the tip of the anchor needle body 1 to a dual-angle structure, the puncture resistance at initial contact is reduced, and the penetration accuracy of the blood vessel wall is improved. After the front needle 4 enters the blood vessel, the rear needle 5, due to its larger diameter, increases the resistance after entering the blood vessel, thus avoiding excessive puncture of the blood vessel by the needle.

[0023] like Figure 1-3As shown, the rear needle 5 has a protrusion 9 on the side away from the front needle 4. There are multiple protrusions 9. After the needle punctures the blood vessel, the anchor needle body 1 can be fixed at the edge of the puncture hole to prevent the needle from slipping during subsequent operations.

[0024] like Figure 1-3 As shown, the protrusion 9 is configured with a small protrusion structure, and the length of the protrusion 9 is 0.1-0.2mm.

[0025] like Figure 1-3 As shown, the side wall of the connecting tube 2 facing the connecting section 6 is provided with an observation hole 10, which facilitates observation of the position of the suture 3 passing through the connecting tube 2.

[0026] like Figure 1-3 As shown, the inner wall of the connecting pipe 2 is evenly provided with multiple mounting grooves 11, and the mounting grooves 11 are provided with mounting supports 12, and the barbs 8 are rotatably mounted on the mounting supports 12.

[0027] like Figure 1-3 As shown, the mounting bracket 12 has a mounting groove 13 that is adapted to the barb 8 on the side facing the barb 8. A spring 14 is provided between the mounting groove 13 and the barb 8. When the suture 3 is pulled in the opposite direction, the barb 8 enters the suture 3, the barb 8 rotates and unfolds, and the tissue suture 3 is detached.

[0028] Working principle: When installing the suture 3 and the connecting tube 2, one end of the suture 3 is inserted into the connecting tube 2 until one end of the suture 3 can be seen through the observation hole 10. During the suturing process, the suture 3 and the connecting tube 2 will be pulled. When pulled, one end of the barb 8 rotates and unfolds. The tip of the barb 8 hangs on the suture 3 against the direction of suture 3 detachment, making it difficult for the suture 3 to detach. There are multiple barbs 8 to ensure the installation quality of the suture 3 and the connecting tube 2. By setting the tip of the anchor needle body 1 to a double-angle structure, the puncture resistance at initial contact is reduced and the penetration accuracy of the blood vessel wall is improved. After the front needle 4 enters the blood vessel, the rear needle 5, due to its larger diameter, increases the resistance after entering the blood vessel, avoiding the situation of the needle puncturing the blood vessel excessively.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An anchor needle assembly for a vascular suture device, comprising an anchor needle body (1) and a connecting tube (2), wherein the connecting tube (2) is assembled and connected to the anchor needle body (1), and a suture (3) is threaded through the connecting tube (2), characterized in that, The anchor needle body (1) includes a front needle head (4), a rear needle head (5) and a connecting section (6). The front needle head (4) and the rear needle head (5) are respectively arranged in a conical and a frustum-shaped structure. The rear needle head (5) is assembled and connected to the end face of the front needle head (4). The rear needle head (5) is assembled and connected to the connecting tube (2) through the connecting section (6). The inclination angle of the rear needle head (5) is greater than that of the front needle head (4). The lower part of the connecting tube (2) is provided with a waist groove (7) for passing through the suture (3). The inner wall of the connecting tube (2) is provided with multiple barbs (8). The end of the barb (8) away from the anchor needle body (1) is rotatably connected to the inner wall of the connecting tube (2).

2. The anchor pin assembly of a vascular suture device according to claim 1, characterized in that: The angle between the side of the front needle (4) and the perpendicular bisector is A, and the angle between the side of the rear needle (5) and the perpendicular bisector is B. Angle A is less than angle B. Angle A is 20 degrees and angle B is 30 degrees.

3. The anchor pin assembly of a vascular suture device according to claim 2, characterized in that: The rear needle (5) has a protrusion (9) on the side away from the front needle (4), and there are multiple protrusions (9).

4. The anchor pin assembly of a vascular suture device according to claim 3, characterized in that: The protrusion (9) is provided with a small protrusion structure, and the length of the protrusion (9) is 0.1-0.2mm.

5. The anchor pin assembly of a vascular suture device according to claim 1, characterized in that: The connecting pipe (2) has an observation hole (10) on the side wall of one end facing the connecting section (6).

6. The anchor pin assembly of a vascular suture device according to claim 5, characterized in that: The inner wall of the connecting pipe (2) is uniformly provided with a plurality of mounting grooves (11), and a mounting bracket (12) is provided in the mounting groove (11). The barb (8) is rotatably mounted on the mounting bracket (12).

7. The anchor pin assembly of a vascular suture device according to claim 6, characterized in that: The mounting bracket (12) has a mounting groove (13) that is adapted to the barb (8) on the side facing the barb (8), and a spring (14) is provided between the mounting groove (13) and the barb (8).

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