Quick connect extravascular stent

Abstract

This utility model provides a quick-connect vascular stent, relating to the field of vascular stents. A quick-connect vascular stent includes a stent, a connecting seat, and a connector. The stent is fitted onto the outer wall of a first blood vessel; the connecting seat is fixed at the opening of a second blood vessel; the connector is installed between the connecting seat and the stent. The connector and the connecting seat cooperate to quickly fix the stent between the first and second blood vessels. Through the cooperation of the inner magnetic ring, outer magnetic ring, puncture needle, and base, fixation is achieved without sutures, allowing for rapid connection and fixation of the first and second blood vessels, reducing surgical time, and providing support at a specific angle through its shape.

Description

Technical Field

[0001] This utility model relates to the field of vascular stent technology, and more specifically, to a quick-connect external vascular stent. Background Technology

[0002] Arteriovenous fistula is generally used as an autologous vascular reconstruction procedure for dialysis patients undergoing hemodialysis. External vascular stents are also a commonly used auxiliary fistula device, but arteriovenous vascular connections are still mainly made by suturing.

[0003] For example, CN202410737516.8 discloses an external vascular stent for anastomosing a first and a second blood vessel, comprising a rigid first component and a flexible second component. The rigid first component is fitted over the first blood vessel, while the flexible second component has a dense surface for suturing onto the second blood vessel. This allows the external vascular stent to form a protective structure at the anastomosis site, protecting the joint and suppressing vascular oscillations. Therefore, this external vascular stent can protect the anastomosis site, maximizing the prevention of complications and promoting anastomotic stability.

[0004] An external vascular stent, with application number 202022093614.2, comprises: a support portion having a cylindrical support port with an opening at one end, which can be fitted onto a vein, the opening of which is at an angle to the artery; a fixing arm that can wrap around the outer surface of the artery to fix the support portion at the arteriovenous anastomosis; and a guide portion, also cylindrical, which can be fitted onto the vein, with one end fixedly connected to the support port and extending along the opening direction of the support port. A diaphragm is disposed between the support portion, the guide portion, and the blood vessel. With this structure, the support portion can be fixed at the arteriovenous anastomosis by the fixing arm. After the vein passes through the support port, the guide portion can support and fix the angle between the artery and vein, maintaining laminar blood flow and reducing complications caused by eddies. Simultaneously, the diaphragm isolates the blood vessel from the support portion and the guide portion, preventing the support portion and the guide portion from irritating or damaging the blood vessel, thus allowing the external vascular stent to be used for a long time.

[0005] The technical problem solved by this utility model is to provide an arteriovenous vascular connection device that does not require suture fixation and reduces operation time. Utility Model Content

[0006] The purpose of this invention is to provide a quick-connect vascular stent that can quickly connect to arteries and veins and provide support at a specific angle.

[0007] An embodiment of this utility model can be implemented as follows: a quick-connect vascular stent includes a stent, a connecting seat, and a connector. The stent is sleeved on the outer wall of a first blood vessel; the connecting seat is fixed at the opening of a second blood vessel; and the connector is installed between the connecting seat and the stent. The connector and the connecting seat cooperate to fix the stent between the first and second blood vessels.

[0008] Preferably, the connector includes an outer magnetic ring and an inner magnetic ring. The outer magnetic ring is fixedly connected to one end of the stent near the second blood vessel. The inner magnetic ring is magnetically connected to the bottom of the outer magnetic ring and embedded in the inner wall of the opening of the second blood vessel. The stent is fixed by the outer magnetic ring and the inner magnetic ring.

[0009] Preferably, the connecting seat includes a base and a puncture needle. The base is disposed on the inner wall of the second blood vessel near the first blood vessel and is fixed to the bottom of the inner magnetic ring. The puncture needle is fixed to the surface of the base and sequentially punctures the inner wall end of the first blood vessel and the wall surface of the second blood vessel. The base fixes the inner magnetic ring to the second blood vessel through the puncture needle.

[0010] Preferably, the outer magnetic ring and the outer surface of the second blood vessel are fitted together, and the inner magnetic ring and the base are fitted together with the inner wall of the second blood vessel.

[0011] Preferably, several puncture needles are provided and inserted into the reserved holes of the outer magnetic ring.

[0012] Preferably, the base and the puncture needle are integrally formed.

[0013] Preferably, the end of the outer magnetic ring away from the second blood vessel has a smooth curved surface, and the smooth curved surface extends to the outer wall of the stent.

[0014] The beneficial effects of the quick-connect vascular stent provided in this embodiment include: through the cooperation between the inner magnetic ring, the outer magnetic ring, the puncture needle and the base, fixation can be achieved without sutures, allowing for quick connection and fixation of the first and second blood vessels, reducing surgical time, and providing support at a specific angle through the shape design. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the base and puncture needle;

[0018] Figure 3 for Figure 2 Another structural diagram;

[0019] Figure 4 for Figure 1 Schematic diagram of the structure of the inner and outer magnetic rings;

[0020] Figure 5 for Figure 1 Schematic diagram of the mid-support structure;

[0021] Figure 6 for Figure 1 Side sectional view;

[0022] Figure 7 for Figure 6 A schematic diagram of the structure of the stent, the second vessel, and the puncture needle.

[0023] Icons: 1. First blood vessel; 2. Second blood vessel; 3. Stent; 4. Connector; 41. Base; 42. Puncture needle; 5. Connector; 51. Outer magnetic ring; 52. Inner magnetic ring. Detailed Implementation

[0024] Currently, arteriovenous vessel connections are still mainly achieved through suturing. This method involves a long operation time, requires high suturing skills, and is prone to failure if not handled carefully, causing secondary harm to the patient and hindering postoperative recovery.

[0025] To address the aforementioned problems, this utility model provides a quick-connect vascular stent. Through the cooperation between the inner magnetic ring, outer magnetic ring, puncture needle, and base, fixation can be achieved without sutures, allowing for rapid connection and fixation of the first and second blood vessels, reducing surgical time. Furthermore, the shape design provides support at a specific angle, thus solving the aforementioned technical problems.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0030] The following detailed description of the overall structure, working principle, and technical effects of the quick-connect vascular stent provided by this utility model, through embodiments and in conjunction with the accompanying drawings, is a practical example.

[0031] Please refer to Figures 1-7 The quick-connect vascular stent provided by this utility model can be used to connect arteries and veins, and can quickly connect and fix the first and second blood vessels, reducing operation time, and providing support at a specific angle through the shape setting.

[0032] like Figure 1 , Figure 5 and Figure 6 As shown, a quick-connect vascular stent includes a stent 3, a connecting seat 4, and a connector 5. The stent 3 is sleeved on the outer wall of a first blood vessel 1; the connecting seat 4 is fixed at the opening of a second blood vessel 2; and the connector 5 is installed between the connecting seat 4 and the stent 3. The connector 5 and the connecting seat 4 cooperate to fix the stent 3 between the first blood vessel 1 and the second blood vessel 2.

[0033] In the specific implementation process, it is worth noting that the first blood vessel 1 is a vein and the second blood vessel 2 is an artery. The stent 3 is sleeved on the outer wall of the first blood vessel 1 to facilitate the connection between the first blood vessel 1 and the second blood vessel 2. The connecting seat 4 is pre-embedded at the connection between the second blood vessel 2 and the first blood vessel 1. The connecting seat 4 and the second blood vessel 2 are quickly connected through the connecting piece 5. That is, the first blood vessel 1 and the second blood vessel 2 are quickly connected without sutures, reducing the operation time.

[0034] Understandably, scaffold 3 can be 3D printed using biodegradable materials;

[0035] Alternatively, nickel-titanium wire can be used for weaving.

[0036] Alternatively, a coated scaffold can be made by stitching together nickel-titanium metal rings using materials such as ePTFE.

[0037] In one feasible approach, please refer to Figure 1 , Figure 3 and Figure 7 The connector 5 includes an outer magnetic ring 51 and an inner magnetic ring 52. The outer magnetic ring 51 is fixedly connected to one end of the stent 3 near the second blood vessel 2. The inner magnetic ring 52 is magnetically connected to the bottom of the outer magnetic ring 51 and is embedded in the inner wall of the opening of the second blood vessel 2. The stent 3 is fixed by the outer magnetic ring 51 and the inner magnetic ring 52.

[0038] It is understandable that the outer magnetic ring 51 and the inner magnetic ring 52 can be formed using permanent magnets;

[0039] Alternatively, 3D printing can be performed using a biodegradable material mixed with magnetic powder in a device that determines the direction of the magnetic field, while simultaneously determining the magnetic poles of the outer magnetic ring 51 and the inner magnetic ring 52.

[0040] Alternatively, an inner magnetic ring 52 can be fabricated in a device that determines the direction of the magnetic field using a hydrogel-mixed magnetic ring, and an outer magnetic ring 51 can be formed using a permanent magnet and coated with a biodegradable material to improve the biocompatibility of the device.

[0041] Of course, the overall curvature of the outer magnetic ring 51 can be set according to the actual situation, so that after the first blood vessel 1 and the second blood vessel 2 are connected, it can be in the shape of "Y", "T" or any other suitable angle.

[0042] In one feasible approach, please refer to Figure 2 , Figure 6 and Figure 7 The connecting seat 4 includes a base 41 and a puncture needle 42. The base 41 is disposed on the inner wall of the second blood vessel 2 near the first blood vessel 1 and is fixed to the bottom of the inner magnetic ring 52. The puncture needle 42 is fixed to the surface of the base 41 and punctures the end of the inner wall of the first blood vessel 1 and the wall of the second blood vessel 2 in sequence. The base 41 fixes the inner magnetic ring 52 to the second blood vessel 2 through the puncture needle 42.

[0043] In the specific implementation process, it is worth noting that the base 41 can be set separately or integrally formed with the inner magnetic ring 52. This simplifies the structure and is conducive to improving the strength. Of course, in this case, the puncture needle 42 is fixed on the surface of the inner magnetic ring 52. The setting of the puncture needle 42 makes it convenient to fix the base 41 on the second blood vessel 2.

[0044] In one feasible approach, please refer to Figure 7 The outer magnetic ring 51 fits into the outer surface of the second blood vessel 2, and the inner magnetic ring 52 and the base 41 fit into the inner wall of the second blood vessel 2.

[0045] In the specific implementation process, it is worth noting that this design is conducive to the tightness of the fit between the overall structure and the blood vessels, and the connection strength between the first blood vessel 1 and the second blood vessel 2 is better.

[0046] In one feasible approach, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 7 Several puncture needles 42 are provided and inserted into the reserved holes of the outer magnetic ring 51;

[0047] In the specific implementation process, it is worth noting that multiple puncture needles 42 are set and are equidistant from each other to ensure that the connection position of the first blood vessel 1 and the second blood vessel 2 is subjected to balanced force, which is conducive to postoperative recovery.

[0048] In one feasible approach, please refer to Figure 2 The base 41 and the puncture needle 42 are integrally formed.

[0049] In the specific implementation process, it is worth noting that this design can improve the strength between the two. Of course, the base 41 can be made of magnetic material, so there is no need to set an inner magnetic ring 52. The base 41 can be used instead of the inner magnetic ring 52.

[0050] In one feasible approach, please refer to Figure 1 The end of the outer magnetic ring 51 away from the second blood vessel 2 has a smooth curved surface, and the smooth curved surface extends to the outer wall of the stent 3.

[0051] In the specific implementation process, it is worth noting that the design of the smooth curved surface can improve the smoothness of the connection between the outer magnetic ring 51 and the stent 3, reduce friction on the soft tissues in the body, and facilitate postoperative recovery.

[0052] Procedure: Clamp the distal end (the end furthest from the second blood vessel 2) of the freed first blood vessel 1 (venous vessel). Place the stent 3 on the proximal end (the end closest to the second blood vessel 2) of the first blood vessel 1. Use the puncture needle 42 on the base 41 (the base 41 and the inner magnetic ring 52 can also be designed as an integrated unit, the steps are the same, and will not be described in detail) to puncture the proximal end of the first blood vessel 1 and tidy up the edge of the blood vessel. Place the first blood vessel 1 and the inner magnetic ring 52 into the opened second blood vessel 2, and make the inner magnetic puncture needle 42 puncture the second blood vessel 2 to attract the outer magnetic ring 51 and the inner magnetic ring 52, thus completing the rapid connection of the blood vessel.

[0053] This quick-connecting vascular stent, through the cooperation between the inner magnetic ring 52, the outer magnetic ring 51, the puncture needle 42 and the base 41, can quickly connect and fix the first blood vessel 1 and the second blood vessel 2 without the need for sutures, reducing operation time, and providing support at a specific angle through its shape setting.

[0054] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A quick-connect vascular stent, characterized in that, include: The stent (3) is fitted onto the outer wall of the first blood vessel (1); Connector (4) is fixed at the opening of the second blood vessel (2); A connector (5) is installed between the connector (4) and the bracket (3); The connector (5) and the connector (4) work together to fix the stent (3) between the first blood vessel (1) and the second blood vessel (2).

2. The quick-connect vascular stent according to claim 1, characterized in that, The connector (5) includes: An outer magnetic ring (51) is fixedly connected to one end of the stent (3) near the second blood vessel (2); The inner magnetic ring (52) is magnetically connected to the bottom of the outer magnetic ring (51) and embedded in the inner wall of the opening of the second blood vessel (2); The bracket (3) is fixed by the outer magnetic ring (51) and the inner magnetic ring (52).

3. The quick-connect vascular stent according to claim 2, characterized in that, The connector (4) includes: The base (41) is disposed on the inner wall of the second blood vessel (2) near the first blood vessel (1) and fixed to the bottom of the inner magnetic ring (52); The puncture needle (42) is fixed to the surface of the base (41) and punctures the inner end of the first blood vessel (1) and the wall of the second blood vessel (2) in sequence. The base (41) fixes the inner magnetic ring (52) to the second blood vessel (2) by means of a puncture needle (42).

4. The quick-connect vascular stent according to claim 3, characterized in that, The outer magnetic ring (51) fits into the outer surface of the second blood vessel (2), and the inner magnetic ring (52) and the base (41) fit into the inner wall of the second blood vessel (2).

5. The quick-connect vascular stent according to claim 3, characterized in that, Several puncture needles (42) are provided and inserted into the reserved holes of the outer magnetic ring (51).

6. The quick-connect vascular stent according to claim 3, characterized in that, The base (41) and the puncture needle (42) are integrally formed.

7. The quick-connect vascular stent according to claim 2, characterized in that, The outer magnetic ring (51) has a smooth curved surface at the end away from the second blood vessel (2), and the smooth curved surface extends to the outer wall of the stent (3).

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