Rotatably connected self-expanding intratumoral embolism device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a self-expanding intratumoral embolism device capable of being rotatably connected, which comprises an embolism device, the embolism device is formed by weaving metal wires with shape memory ability and good elasticity in a staggered manner, the embolism device comprises an anchoring part, a blocking part and a drainage part, and a lantern ring is further arranged at the bottom of the embolism device. The sleeve ring is used for being connected with the conveying device, the conveying device, the conveying device and the embolism device are connected through a rotating structure, the conveying device is used for conveying the embolism device into the aneurysm, and the conveying device comprises a conveying pipe. According to the device, the position of the embolism device in the aneurysm can be flexibly adjusted, the ball of the rotating structure freely rotates in the spherical groove of the conveying device, accurate control over the embolism device is achieved, it is ensured that the embolism device can be accurately released to the optimal position of the aneurysm, and the embolism treatment effect is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a rotatable, self-expanding intratumoral embolization device. Background Technology

[0002] Intracranial aneurysms primarily result from the combined effects of degenerative changes in the intracranial vessel walls and abnormal hemodynamic factors. Weak areas of the vessel wall, under the influence of persistent hypertension, arteriosclerosis, and other pathological factors, are gradually impacted by unstable blood flow, causing the vessel wall to bulge outwards and form an aneurysm. These aneurysms are often located at the bifurcation or tortuous parts of intracranial arteries, such as near the circle of heaven of the basilar artery, because the hemodynamic environment in these areas is more complex and more susceptible to damage.

[0003] Treatment for intracranial aneurysms includes endovascular interventional therapy. While stent-assisted coil embolization can reduce the risk of aneurysm rupture to some extent, the rigidity of the stent and the irregular shape of the aneurysm often prevent achieving ideal embolization results. In recent years, intra-aneurysmal embolization devices have emerged that can interfere with blood flow into the aneurysm neck, overcoming the shortcomings of traditional devices. However, existing intra-aneurysmal embolization devices also have some limitations: for example, they may not be able to place the embolizer in the optimal position for lateral wall aneurysms, leading to poor embolization effects. Utility Model Content

[0004] The purpose of this invention is to provide a rotatably connected self-expanding intratumoral embolization device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A rotatably connected self-expanding intratumoral embolization device, comprising:

[0007] An embolizer, the embolizer being formed by interlacing and weaving metal wires with shape memory capability and good elasticity, the embolizer including an anchoring part, a sealing part, and a drainage part, and a collar is also provided at the bottom of the embolizer for connecting with a delivery device;

[0008] A delivery device is connected to the embolizer via a rotating structure. The delivery device is used to deliver the embolizer into the aneurysm. The delivery device includes a delivery tube, and a spherical groove is opened in the inner lumen of the delivery tube near the embolizer.

[0009] The rotating structure includes a sphere and a connecting rod. The sphere is disposed in a spherical groove to realize a rotatable connection between the embolizer and the conveying device of the conveying system. A connecting rod is provided on one side of the sphere for connecting with the embolizer.

[0010] Preferably, the diameters of the anchoring part, the sealing part, and the drainage part of the embolizer are D1, D2, and D3, respectively, wherein the diameter of D1 is greater than the diameter of D2, which is greater than the diameter of D3, so that the overall shape of the embolizer is a disc-funnel shape.

[0011] Preferably, the delivery device further includes a connecting wire connected to the rotating structure, the connecting wire being used to limit the rotational structure during embolization deployment to prevent the rotational structure from detaching from the spherical groove.

[0012] Furthermore, the connecting wire is configured to be conductive so as to simultaneously serve as a conductive wire for the electrical decompression of the embolization device.

[0013] Preferably, the sphere is connected to the collar via a connecting rod, and the sphere can rotate freely within the spherical groove.

[0014] Preferably, the spherical groove of the conveying pipe encloses the rotating structure, limiting the maximum rotation angle α that the rotating structure can achieve in the axial direction of the conveying pipe, and the maximum rotation angle satisfies 60°≤a≤150°.

[0015] Preferably, the spherical groove of the conveying pipe encloses the rotating structure, limiting the maximum rotation angle α that the rotating structure can achieve in the axial direction of the conveying pipe, and the maximum rotation angle satisfies 60°≤a≤120°.

[0016] Preferably, the end of the conveying pipe is tapered to increase the rotatable range of the rotating structure.

[0017] Specifically, when the maximum rotation angle that the rotating structure can achieve in the direction of the conveying pipe axis is greater than 90°, the diameter of the conical surface at the end of the conveying pipe is larger at the near end and smaller at the far end; when the maximum rotation angle that the rotating structure can achieve in the direction of the conveying pipe axis is less than 90°, the diameter of the conical surface at the end of the conveying pipe is smaller at the near end and larger at the far end.

[0018] Specifically, the conveying device can be pushed and pulled in the axial direction to adjust the fitting angle between the rotating structure and the spherical groove, thereby realizing the position control of the embolizer.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. In this utility model, through the rotatable connection design between the embolizer and the delivery system, the device can flexibly adjust the position of the embolizer in the aneurysm. By utilizing the free rotation of the ball in the rotating structure within the spherical groove of the delivery device, precise control of the embolizer can be achieved, ensuring that the embolizer can be accurately released to the optimal position of the aneurysm, significantly improving the embolization treatment effect.

[0021] 2. In this invention, the large-angle deflection capability of over 30° enables efficient occlusion of complex aneurysm morphologies. The funnel-shaped design and rotatable connection of the embolizer allow it to adhere closely to the aneurysm wall, effectively sealing the aneurysm neck while minimizing interference with normal blood vessels, thus ensuring the safety and effectiveness of the treatment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is an exploded view of the overall structure of this utility model;

[0024] Figure 3 This utility model Figure 1 Enlarged view of area A in the middle;

[0025] Figure 4 This is a schematic diagram of the structure of the present invention after movement;

[0026] Figure 5 This utility model Figure 4 Enlarged view of area B in the middle;

[0027] Figure 6 This is a schematic diagram of the application scenario of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0029] In the diagram: 1. Embolizer; 11. Anchoring part; 12. Sealing part; 13. Drainage part; 14. Collar; 2. Conveying device; 21. Conveying pipe; 22. Spherical groove; 23. Connecting wire; 3. Rotating structure; 31. Sphere; 32. Connecting rod. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] Example 1:

[0033] Please see Figure 1-6 This utility model provides a technical solution:

[0034] A rotatably connected self-expanding intratumoral embolization device, comprising:

[0035] The embolizer 1 is formed by interlacing metal wires with shape memory capability and good elasticity. The embolizer 1 includes an anchoring part 11, a sealing part 12, and a drainage part 13. The bottom of the embolizer 1 is also provided with a collar 14, which is used to connect with the delivery device 2.

[0036] Delivery device 2 is connected to embolizer 1 via rotating structure 3. Delivery device 2 is used to deliver embolizer 1 into aneurysm. Delivery device 2 includes delivery tube 21. A spherical groove 22 is opened in the inner cavity of the delivery tube 21 near the embolizer 1.

[0037] The rotating structure 3 includes a ball 31 and a connecting rod 32. The ball 31 is disposed in a spherical groove 22 to realize a rotatable connection between the embolizer 1 and the conveying device 2 of the conveying system. A connecting rod 32 is provided on one side of the ball 31 for connecting with the embolizer 1.

[0038] In this embodiment, please refer to Figure 2 , Figure 6 The diameters of the anchoring part 11, the blocking part 12, and the drainage part 13 of the embolizer 1 are D1, D2, and D3, respectively, where the diameter of D1 is larger than that of D2, which is larger than that of D3. This makes the overall shape of the embolizer 1 resemble a dish-funnel. In this embodiment, since the diameter of the anchoring part 11 is the largest, when the embolizer 1 is implanted into the aneurysm, the top of it first contacts the aneurysm wall, which can more effectively anchor it in the aneurysm and ensure the stability of the embolizer 1 in subsequent operations. Since the diameter of the blocking part 12 gradually decreases, it covers and blocks the neck of the aneurysm. This design can more effectively reduce the impact of blood on the aneurysm and improve the blocking effect. The diameter of the drainage part 13 is the smallest, which can divert blood and guide it to normal blood vessels, reduce the blood flow pressure in the aneurysm, and further reduce the risk of aneurysm rupture.

[0039] In this embodiment, please refer to Figure 3 , Figure 6The delivery device 2 also includes a connecting wire 23 connected to the rotating structure 3. The connecting wire 23 is used to limit the rotation structure 3 during the deployment of the embolizer 1, preventing the rotation structure 3 from detaching from the spherical groove 22. The delivery device 2 has a cavity to accommodate the connecting wire 23, and the distal end of the connecting wire 23 is fixedly connected to the proximal end of the rotating structure 3. At the same time, the connecting wire 23 is made to be conductive, so as to serve as a conductive wire for the electrolytic deactivation of the embolizer 1. Integrating the connecting wire and the conductive wire into a single wire simplifies the structure of the delivery device 2. In this embodiment, the spherical groove 22 guides the rotation of the rotating structure 3; and in some embodiments, when the opening of the spherical groove 22 is located at the distal end of the rotating structure 3, the spherical groove 22 limits the rotating structure 3, preventing the rotating structure 3 from detaching from the spherical groove 22; in other embodiments, when the opening of the spherical groove 22 is located at the proximal end of the rotating structure 3, the spherical groove 22 cannot limit the rotating structure 3, and the connecting wire 23 effectively prevents the rotating structure 3 from accidentally detaching from the spherical groove 22, thereby improving the stability and reliability of the overall device. The limiting function of the connecting wire 23 ensures the accuracy and controllability of the embolizer 1 when adjusting its position, enabling doctors to more accurately deploy the embolizer to the expected location of the aneurysm, improving the treatment effect. Simultaneously, when the connecting wire 23 is set to be conductive, after the embolizer 1 is deployed, the connecting wire 23 connecting the embolizer 1 and the rotating structure 3 is fused by electricity, achieving rapid separation of the embolizer 1 from the delivery device 2, facilitating subsequent treatment steps. In other embodiments, the connecting wire and the conductive wire may also be provided as two separate elements to meet the structural requirements.

[0040] In this embodiment, please refer to Figure 2-3 The ball 31 is connected to the collar 14 via the connecting rod 32. The ball 31 can rotate freely within the spherical groove 22. In this embodiment, the free rotation of the ball 31 within the spherical groove 22 enables a rotatable connection between the embolizer 1 and the delivery device 2. The doctor can adjust the angle of the rotation structure 3 and the spherical groove 22 by pushing and pulling in the axial direction of the delivery system 2, thereby more flexibly adjusting the position and direction of the embolizer 1 within the aneurysm, achieving position control of the embolizer, ensuring that the embolizer can be accurately placed in the expected position, and improving the accuracy and success rate of the surgery.

[0041] In this embodiment, the distal end of the sphere 31 is connected to the connecting rod 32, and the proximal end is connected to the connecting wire 23. Furthermore, the connecting rod 32 and the connecting wire 23 are connected at symmetrical positions at both ends of the sphere 31.

[0042] In this embodiment, please refer to Figure 4-5The spherical groove 22 of the delivery tube 21 encloses the sphere 31 of the rotating structure 3, limiting the maximum rotation angle α of the rotating structure 3 along the axial direction of the delivery tube 21. The maximum rotation angle α satisfies 60°≤a≤150°. This setting ensures that the sphere 31 has sufficient rotation space while also providing a certain degree of guidance for the rotating structure 3 through the spherical groove 22, helping to ensure the stability of the sphere 31 during rotation. By varying the degree to which the spherical groove 22 encloses the rotating structure 3, multiple specifications of rotatable self-expanding intra-aneurysm embolization devices that meet the embolization requirements are formed. For example, multiple specifications of rotatable self-expanding intra-aneurysm embolization devices with maximum rotation angles of 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, and 150° along the axial direction are available. Operators can select the appropriate specification according to the needs of the aneurysm. Furthermore, in this embodiment, by setting a to the range of 60° to 120°, for most lateral wall aneurysms, the maximum rotation angle of the rotatable self-expanding intraneural embolization device is sufficient to meet the position adjustment requirements of the embolizer 1 within the range of 60° to 120°, while avoiding the increase in operational difficulty that may be caused by an excessively large rotation range.

[0043] When the spherical groove 22 encloses the rotating structure 3 such that its maximum rotation angle in the axial direction of the conveying pipe 21 is greater than or equal to 90°, the spherical groove 22 guides the rotating structure 3, and the connecting wire 23 holds the rotating structure 3 in place, thus preventing the ball 31 of the rotating structure 3 from detaching from the spherical groove 22. When the spherical groove 22 encloses the rotating structure 3 such that its maximum rotation angle in the axial direction of the conveying pipe 21 is less than 90°, the spherical groove 22 not only guides the ball 31 of the rotating structure 3, but also encloses the rotating structure 3 to prevent the ball 31 of the rotating structure 3 from detaching from the spherical groove 22. The connecting wire 23 can also be provided to further prevent the ball 31 from detaching from the spherical groove 22.

[0044] In this embodiment, please refer to Figure 3 The end of the delivery tube 21 is tapered to increase the rotatable range of the rotating structure 3. In this embodiment, the tapered design of the delivery tube 21 helps reduce the friction and resistance between the rotating structure 3 and the inner wall of the delivery tube 21 during rotation, allowing the embolizer 1 to be positioned more accurately at the predetermined location of the aneurysm. When the spherical groove 22 encloses the rotating structure 3 such that its maximum rotation angle in the axial direction of the delivery tube 21 is greater than 90°, the diameter of the tapered surface at the end of the delivery tube 21 is larger at the proximal end and smaller at the distal end; when the spherical groove 22 encloses the rotating structure 3 such that its maximum rotation angle in the axial direction of the delivery tube 21 is less than 90°, the diameter of the tapered surface at the end of the delivery tube 21 is smaller at the proximal end and larger at the distal end.

[0045] Example 2:

[0046] Based on Example 1, please refer to Figure 7 The spherical groove 22 in the axial direction of the delivery tube 21 encloses the rotating structure 3, so that the maximum achievable rotation angle α of the rotating structure 3 in the axial direction is 110°. This specification setting of a maximum rotation angle greater than 90° allows the sphere 31 to have a larger rotation space within the spherical groove 22, that is, the rotating structure 3 can rotate between 0° and 110°. The embolizer 1 has a sufficient adjustable angle, which greatly improves the ability of the embolizer 1 to adjust its position within the aneurysm. For lateral wall aneurysms with complex shapes or large angles, a larger rotation range means that the embolizer 1 can be more easily adjusted to the optimal position, thereby improving the embolization effect.

[0047] Working principle of this utility model:

[0048] Step 1: The proximal end of the rotating structure 3 is a sphere 31, which is connected to the collar 14 via a connecting rod 32. The distal end of the delivery device 2 has a spherical groove 22. The sphere 31 is assembled in the hemispherical groove 22 to form a rotatable structure. The sphere 31 can rotate freely in the circumferential direction in the spherical groove 22, achieving 360° rotation in the circumferential direction. This allows the embolizer 1 and the delivery device 2 to be rotatably connected. By continuously pushing and pulling the delivery device 2, the doctor can rotate the embolizer 1 to the optimal position within the aneurysm, ensuring that the embolizer can be accurately released and effectively seal the aneurysm neck. This flexible rotation adjustment mechanism overcomes the difficulty of placing the embolizer in the optimal position in the treatment of lateral wall aneurysms using traditional embolization devices.

[0049] Step 2: Embolizer 1 is woven from metal wire with shape memory capability. When embolizer 1 is compressed and placed in delivery device 2, its shape remains compressed. Once embolizer 1 is released into the aneurysm, as the external constraint is released, embolizer 1 will spontaneously return to its initial funnel-shaped (disc-shaped) state and generate self-expansion force. This self-expansion capability allows embolizer 1 to fit tightly against the aneurysm wall and form an effective blockage at the aneurysm neck. The anchoring part 11 of embolizer 1 is released first and comes into contact with the aneurysm wall. Through its shape and material design, embolizer 1 can be anchored in the aneurysm. After release, the blocking part 12 will cover and block the aneurysm neck, reducing the impact of blood on the aneurysm. The diameter D2 of the occlusion section 12 gradually decreases from the top to the constriction section. This design helps to create a tight occlusion effect. The drainage section 13 diverts blood and guides it to normal blood vessels, reducing further impact of blood on the aneurysm. After the embolizer 1 is deployed, the connecting rod between the embolizer 1 and the rotating structure 3 is electrically detached via the connecting wire 23 in the delivery device 2. That is, the connecting rod is fused by electricity, completely separating the embolizer 1 from the delivery device 2, thereby completing the embolization treatment process.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. This utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rotatably connected self-expanding intratumoral embolization device, characterized in that: include The embolizer (1) is formed by interlacing metal wires with shape memory capability and good elasticity. The embolizer (1) includes an anchoring part (11), a sealing part (12), and a drainage part (13). The bottom of the embolizer (1) is also provided with a collar (14), which is used to connect with the delivery device (2). Delivery device (2), the delivery device (2) is connected to the embolizer (1) through a rotating structure (3), the delivery device (2) is used to deliver the embolizer (1) into the aneurysm, the delivery device (2) includes a delivery tube (21), and a spherical groove (22) is opened in the inner cavity of the delivery tube (21) near the embolizer (1). The rotating structure (3) includes a ball (31) and a connecting rod (32). The ball (31) is disposed in a spherical groove (22) to realize a rotatable connection between the embolizer (1) and the conveying device (2) of the conveying system. A connecting rod (32) is provided on one side of the ball (31) for connecting with the embolizer (1).

2. The rotatably connected self-expanding intratumoral embolization device according to claim 1, characterized in that: The diameters of the anchoring part (11), the sealing part (12), and the drainage part (13) of the embolizer (1) are D1, D2, and D3, respectively, wherein the diameter of D1 is greater than the diameter of D2 and the diameter of D3, so that the overall shape of the embolizer (1) is a disc funnel shape.

3. The rotatably connected self-expanding intratumoral embolization device according to claim 1, characterized in that: The delivery device (2) also includes a connecting wire (23) connected to the rotating structure (3), the connecting wire (23) being used to limit the rotating structure (3) during the deployment of the embolizer (1) to prevent the rotating structure (3) from detaching from the spherical groove (22).

4. The rotatably connected self-expanding intratumoral embolization device according to claim 3, characterized in that, The connecting wire (23) is configured to be conductive so as to simultaneously serve as a conductive wire for the electrolytic decomposition of the embolizer (1).

5. The self-expanding intratumoral embolization device with rotatable connection according to claim 1, characterized in that: The sphere (31) is connected to the collar (14) via a connecting rod (32), and the sphere (31) can rotate freely within the spherical groove (22).

6. The rotatably connected self-expanding intratumoral embolization device according to claim 1, characterized in that: The spherical groove (22) of the conveying pipe (21) encloses the rotating structure (3), limiting the maximum rotation angle a that the rotating structure (3) can reach in the axial direction of the conveying pipe (21), and the maximum rotation angle a satisfies 60°≤a≤150°.

7. The rotatably connected self-expanding intratumoral embolization device according to claim 6, characterized in that, The spherical groove (22) of the conveying pipe (21) encloses the rotating structure (3), limiting the maximum rotation angle a that the rotating structure (3) can reach in the axial direction of the conveying pipe (21), and the maximum rotation angle a satisfies 60°≤a≤120°.

8. A rotatably connected self-expanding intratumoral embolization device according to claim 7, characterized in that: The end of the delivery pipe (21) is set as a conical surface to increase the rotatable range of the rotating structure (3).

9. A rotatably connected self-expanding intratumoral embolization device according to claim 8, characterized in that, The spherical groove (22) wraps around the rotating structure (3) so that when the maximum rotation angle that the rotating structure (3) can reach in the axial direction of the conveying pipe (21) is greater than 90°, the diameter of the conical surface at the end of the conveying pipe (21) is larger at the near end and smaller at the far end. The spherical groove (22) wraps around the rotating structure (3) so that when the maximum rotation angle that the rotating structure (3) can reach in the axial direction of the conveying pipe (21) is less than 90°, the diameter of the conical surface at the end of the conveying pipe (21) is smaller at the near end and larger at the far end.

10. A rotatably connected self-expanding intratumoral embolization device according to claim 7, characterized in that, The conveying device (2) can be pushed and pulled in the axial direction to adjust the fitting angle between the rotating structure (3) and the spherical groove (22), thereby realizing the position control of the embolizer (1).

Images