Release mechanism and embolization device

Abstract

The present invention provides a release mechanism and an embolization device. The release mechanism is used to achieve the release of an implant, and includes: a release member, a first control member, and a second control member; the proximal end of the release member is used to be connected to the implant; both the first control member and the second control member penetrate through the release member, and the proximal ends of the first control member and the second control member are interlocked in a releasable manner on the proximal side of the release member; wherein, when the first control member and the second control member are interlocked, the first control member, the second control member are connected to the release member; when the first control member and the second control member are unlocked, the connection between the first control member, the second control member and the release member is released. With such a setting, repositioning and retraction of the implant can be achieved. Moreover, the mechanical structure of the release mechanism is relatively simple, and the processing technology is easier to implement.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a detaching mechanism and an embolization device. Background Art

[0002] An embolization device is a commonly used instrument for intravascular embolization and occlusion, and is widely used in the treatment of intracranial aneurysms, embolization of the aorta and peripheral blood vessels, and filling after endoleak of a graft. The embolization device includes, for example, a coil, which is pre - disposed in a catheter in an approximately straightened state, and is released after being pushed out of the catheter. Clinically, doctors usually need to re - position or adjust the release form of the coil, and the embolization device is required to have a controllable detachment function.

[0003] Coils are classified into controllable coils and push coils according to the release mechanism. A controllable coil can be re - positioned or retracted through a detaching mechanism when it is in the catheter or outside the catheter. However, the current detaching mechanism of the controllable coil has a complex structure, extremely high requirements for processing technology, posing great challenges to production and processing, poor reliability, and poor feasibility. In addition, the detaching part of the detaching structure on the coil is not smooth enough, posing a potential risk of damage to the tumor body and blood vessels. A push coil can be unidirectionally pushed by a push wire until it is pushed out of the catheter, and the mechanical mechanism is relatively simple and the processing cost is low. However, it can only be retracted in the catheter, and the controllable function fails after being pushed out of the catheter, and the functions of re - positioning and retracting cannot be achieved.

[0004] Therefore, it is necessary to develop a detaching mechanism and an embolization device to solve at least the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a detaching mechanism and an embolization device to solve the problem that the current detaching mechanism cannot achieve re - positioning and retraction.

[0006] To solve the above - mentioned technical problems, the present invention provides a detaching mechanism for realizing the detachment of an implant, which is characterized by comprising: a detaching member, a first control member, and a second control member; the proximal end of the detaching member is used for connecting with the implant; both the first control member and the second control member penetrate through the detaching member, and the proximal ends of the first control member and the second control member are interlocked in an unlockable manner on the proximal side of the detaching member; wherein, when the first control member and the second control member are interlocked, the first control member, the second control member are connected with the detaching member; when the first control member and the second control member are unlocked, the connection between the first control member, the second control member and the detaching member is released.

[0007] Optionally, the second control member includes a control guide wire and a connection ring, and the connection ring is connected to the proximal end of the control guide wire; when the connection ring is sleeved on the first control member, the first control member and the second control member are interlocked; when the first control member is withdrawn from the connection ring, the first control member and the second control member are unlocked.

[0008] Optionally, the second control member further includes a transition section, and the control guide wire and the connection ring are connected through the transition section; the transition section is provided with a constant diameter or a variable diameter.

[0009] Optionally, the proximal end of the first control member is further used to extend into the internal cavity of the implant, and the connection ring sleeved on the first control member is located between the release member and the implant.

[0010] Optionally, the length of the first control member passing through the connection ring is greater than the distance that the first control member and the second control member drive the implant to move towards the distal end.

[0011] Optionally, the proximal end of the first control member has a bent portion, and the bent portion is connected to the connection ring.

[0012] Optionally, the release member includes a connection portion and an end portion, the distal end of the connection portion is connected to the end portion, and the proximal end of the connection portion is used to be connected to the implant; the end portion has a first channel and a second channel, and the first channel and the second channel are respectively provided for the first control member and the second control member to penetrate through, and the cross-sectional dimensions of the first channel and the second channel are respectively larger than the cross-sectional dimensions of the first control member and the second control member.

[0013] Optionally, the radial dimension of the end portion is larger than the radial dimension of the internal cavity of the implant.

[0014] Optionally, the release mechanism further includes a push rod, the push rod has a first cavity and a second cavity, and the first control member and the second control member respectively penetrate through the first cavity and the second cavity; the distal ends of the first control member and the second control member are connected to the distal end of the push rod and can axially move relative to the push rod.

[0015] To solve the above technical problems, the present invention further provides an embolization device, including: an implant, a catheter, and the release mechanism as described above, the implant is connected to the release member of the release mechanism, the catheter has a cavity, the release mechanism and the implant are arranged in the cavity, and the release mechanism and the implant are movable relative to the catheter.

[0016] In a release mechanism and an embolization device provided by the present invention, the release mechanism is used to achieve the release of an implant, and includes: a release member, a first control member, and a second control member; the proximal end of the release member is used to connect with the implant; both the first control member and the second control member penetrate through the release member, and the proximal ends of the first control member and the second control member are unlockably interlocked on the proximal side of the release member, so that the connection and release among the three can be realized, and its mechanical structure is relatively simple, the processing technology is easier to implement, the reliability is good, and the feasibility is strong. Among them, when the first control member and the second control member are interlocked, the first control member, the second control member and the release member are connected, so that the first control member and the second control member can move together with the implant, so that the first control member and the second control member can perform operations of retracting and repositioning the implant; when the first control member and the second control member are unlocked, the connection between the first control member, the second control member and the release member is released, and the implant connected to the release member is released, so that the implant can be placed into the diseased part of the patient. Description of the Drawings

[0017] Those of ordinary skill in the art will understand that the provided drawings are used to better understand the present invention and do not constitute any limitation to the scope of the present invention. Among them:

[0018] Figure 1 It is a schematic diagram of the release mechanism according to an embodiment of the present invention in a catheter.

[0019] Figure 2 It is a schematic diagram of the second control member according to an embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the release member according to an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the push rod according to an embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the release mechanism according to an embodiment of the present invention outside the catheter.

[0023] Figure 6 It is a schematic diagram of the release mechanism after unlocking according to an embodiment of the present invention.

[0024] Figure 7 It is a schematic diagram of the control component disconnecting from the implant according to an embodiment of the present invention.

[0025] Figure 8 It is a schematic diagram of another release mechanism according to an embodiment of the present invention.

[0026] In the drawings:

[0027] 1 - Implant;

[0028] 10 - Release member, 11 - Connecting portion, 12 - End portion, 121 - First channel, 122 - Second channel;

[0029] 20 - Control assembly, 21 - First control member, 211 - Bending portion, 22 - Second control member, 221 - Control guide wire, 222 - Connecting ring, 223 - Transition section;

[0030] 30 - Pushing rod, 31 - First cavity, 32 - Second cavity;

[0031] 40 - Catheter. Detailed implementation manner

[0032] To make the objectives, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and not drawn to scale, and are only used to conveniently and clearly assist in explaining the objectives of the embodiments of the present invention. In addition, the structures shown in the accompanying drawings are often a part of the actual structures. In particular, the accompanying drawings need to show different emphases and sometimes different scales are used.

[0033] As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. As used in this specification, the term "or" is generally used in the sense of including "and / or" unless the context clearly dictates otherwise. The term "several" is generally used in the sense of including "at least one", and the term "at least two" is generally used in the sense of including "two or more". In addition, the terms "first", "second", "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", "third" may explicitly or implicitly include one or at least two of such features. The terms "mounted", "connected", "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integral; it may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. The term "proximal" refers to the end close to the patient's lesion site, and the term "distal" refers to the end close to the operator's operation. In addition, as used in the present invention, an element being disposed on another element generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements may be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate element, and should not be construed as indicating or implying the spatial position relationship between the two elements, that is, an element may be inside, outside, above, below or on one side of another element, etc., in any orientation, unless the context clearly dictates otherwise. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Additionally, in the following description, numerous specific details are given to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, some well-known technical features are not described to avoid obscuring the present invention.

[0034] In a release mechanism and an embolization device provided by an embodiment of the present invention, the release mechanism is used to release an implant, and includes: a release member, a first control member, and a second control member; the proximal end of the release member is used to be connected to the implant; both the first control member and the second control member penetrate through the release member, and the proximal ends of the first control member and the second control member are unlockably interlocked on the proximal side of the release member; wherein, when the first control member and the second control member are interlocked, the first control member, the second control member are connected to the release member; when the first control member and the second control member are unlocked, the connection between the first control member, the second control member and the release member is released. With such a setting, the first control member and the second control member can reposition and retract the implant connected to the release member. Moreover, the mechanical structure of the release mechanism is relatively simple, the processing technology is easier to implement, the reliability is good, and the feasibility is strong.

[0035] The following is a description with reference to the accompanying drawings.

[0036] Please refer to Figures 1 to 7 , Figure 1 which is a schematic diagram of the release mechanism according to an embodiment of the present invention inside a catheter; Figure 2 which is a schematic diagram of the second control member according to an embodiment of the present invention; Figure 3 which is a schematic diagram of the release member and the connecting guide wire according to an embodiment of the present invention; Figure 4 which is a schematic diagram of the push rod according to an embodiment of the present invention; Figure 5 which is a schematic diagram of the release mechanism according to an embodiment of the present invention outside a catheter; Figure 6 which is a schematic diagram of the release mechanism after unlocking according to an embodiment of the present invention; Figure 7 which is a schematic diagram of the control assembly disconnecting from the implant according to an embodiment of the present invention;

[0037] Figure 8 which is a schematic diagram of another release mechanism according to an embodiment of the present invention.

[0038] Please refer to Figure 1 In this embodiment, a release mechanism is provided. The release mechanism is used to release an implant, so that the release mechanism can control the retraction of the implant. The release mechanism includes: a release member 10 and a control assembly 20, and the control assembly 20 includes a first control member 21 and a second control member 22.

[0039] Please refer to Figure 1, the proximal end of the release member 10 is used to connect to the implant 1. The implant 1 is, for example, an embolization component. Further, the implant 1 is a coil. In this embodiment, the implant 1 being a coil is taken as an example for illustration. It should be understood that in this embodiment, the "proximal end" refers to the end close to the patient's lesion site, and the "distal end" refers to the end close to the operator's operation.

[0040] Please continue to refer to Figure 1 , the control assembly 20 includes a first control member 21 and a second control member 22. Both the first control member 21 and the second control member 22 penetrate through the release member 10, and the proximal ends of the first control member 21 and the second control member 22 are interlocked in an unlockable manner on the proximal side of the release member 10. It should be noted that the proximal ends of the first control member 21 and the second control member 22 being interlocked on the proximal side of the release member 10 means that they are relatively interlocked on the proximal side of the release member 10. That is, when the proximal ends of the first control member 21 and the second control member 22 are interlocked, they can drive the release member 10 to move simultaneously. When the proximal ends of the first control member 21 and the second control member 22 are unlocked, both the first control member 21 and the second control member 22 can be pulled out from the release member 10.

[0041] Further, in this embodiment, when the first control member 21 and the second control member 22 are interlocked, the first control member 21, the second control member 22 are connected to the release member 10, so that the control assembly 20 can move together with the release member 10 and the implant 1. For example, the control assembly 20 drives the release member 10 and the implant 1 to move towards the proximal end or towards the distal end, so that the control assembly 20 can perform a retraction operation on the implant 1, realizing the function of repositioning or retracting the implant 1 by the release mechanism inside or outside the catheter. Preferably, when the release member 10 and the implant 1 need to move towards the distal end, the control assembly 20 can drive the implant 1 to move towards the distal end. When the first control member 21 and the second control member 22 are unlocked, the connection between the first control member 21, the second control member 22 and the release member 10 is released, and the release member 10 is released, that is, the implant 1 connected to the release member 10 is released, so that the implant 1 can be placed into the patient's lesion site. With such a setting, the release mechanism can fully control the implant 1 before the active release operation, enabling the control assembly 20 to reposition and retract the implant 1. Moreover, the mechanical structure of the release mechanism is relatively simple, the processing technology is easier to implement, with good reliability and strong feasibility.

[0042] In this embodiment, the interlock between the first control member 21 and the second control member 22 may be a mechanically connected structure. For example, the first control member 21 passes through the second control member 22, or the second control member 22 is sleeved on the first control member 21, and the first control member 21 is provided with a structure to prevent the second control member 22 from slipping off, thereby achieving interlock. When unlocking, the first control member 21 releases the second control member 22 to achieve separation between the two. For another example, the first control member 21 and the second control member 22 are hooked to each other to achieve interlock, and the force of hooking to each other is greater than the force for moving the implant 1 towards the distal end. When unlocking, the hooked structure breaks free from each other, thereby achieving separation.

[0043] Preferably, please continue to refer to Figure 1 With Figure 2 , the second control member 22 includes a control wire 221 and a connection ring 222, and the connection ring 222 is connected to the proximal end of the control wire 221. The connection ring 222 is used to be sleeved on the first control member 21, that is to say, the proximal end of the first control member 21 passes through the connection ring 222. The first control member 21 is, for example, a guide wire. More preferably, the connection ring 222 and the first control member 21 are in clearance fit. When the connection ring 222 is sleeved on the first control member 21, the first control member 21 and the second control member 22 are interlocked; when the first control member 21 is withdrawn from the connection ring 222, the first control member 21 and the second control member 22 are unlocked. Preferably, the first control member 21 may be a rigid metal wire, and the material used may also be stainless steel, nitinol, etc. Its cross-section may be circular or square, which is not limited herein. Further, the control wire 221 of the second control member 22 may also be a rigid metal wire. The connection ring 222 of the second control member 22 may be a ring-shaped flexible polymer material wire, which can be straightened after being stressed to be withdrawn from the release member 10.

[0044] More preferably, as Figure 2As shown, the second control member 22 further includes a transition section 223, and the control wire 221 and the connection ring 222 are connected through the transition section 223. Specifically, the connection ring 222 is a ring formed by folding a metal wire in half, that is, after the metal wire is folded in half, it is fixed through the transition section 223. The transition section 223 can also be of equal diameter or variable diameter, preferably an equal-diameter or variable-diameter circular tube. When the radial dimension formed by the folded metal wire is greater than the radial dimension of the control wire 221, the transition section 223 is of variable diameter, that is, the radial dimension of the folded metal wire is greater than the radial dimension of the control wire 221. The transition section 223 can be made of metal or polymer material. If a polymer material is selected, the control wire 221 and the connection ring 222 can be connected by bonding. If a metal material is selected, either bonding or mechanical clamping can be used for connection. The mechanical clamping method is, for example, an interference fit at the connection between the transition section 223 and the connection ring 222.

[0045] Preferably, as Figure 1 shown, the proximal end of the first control member 21 penetrates through the release member 10, and the proximal end of the first control member 21 is further used to extend into the internal cavity of the implant 1, so that the connection ring 222 sleeved on the first control member 21 is located between the release member 10 and the implant 1, thereby preventing the release member 10 from falling off the first control member 21.

[0046] Preferably, as Figure 1 shown, the length of the first control member 21 passing through the connection ring 222 is greater than the distance that the control assembly 20 drives the implant 1 to move distally. When it is necessary to move the implant 1, the first control member 21 and the second control member 22 of the control assembly 20 jointly pull the implant 1 distally. Although they move synchronously, relative slippage may also occur between the first control member 21 and the connection ring 222. Therefore, the length of the first control member 21 passing through the connection ring 222 is greater than the distance of implant movement, avoiding the slippage of the connection ring 222. It should be understood that the length of the first control member 21 passing through the connection ring 222 refers to the length of the proximal end of the first control member 21 passing through the connection ring 222, and the length of the part of the proximal end of the first control member 21 sleeved on the connection ring 222 is greater than the distance of implant 1 movement.

[0047] Preferably, as Figure 8As shown, the proximal end of the first control member 21 has a bent portion 211. The bent portion 211 of the first control member 21 is connected to the connecting ring 222, thereby preventing the connecting ring 222 from falling off the first control member 21. That is to say, the bent portion 211 of the first control member 21 abuts against the connecting ring 222 to hook the connecting ring 222, so that the first control member 21 is connected to the second control member 22 without separation. Further, the material used for the first control member 21 can be a flexible polymer material or the like, so that when the first control member 21 is pulled, it is easier for the bent portion of the first control member 21 to disengage from the connecting ring 222.

[0048] Preferably, as Figure 3 shown, the release member 10 includes a connecting portion 11 and an end portion 12. The distal end of the connecting portion 11 is connected to the end portion 12, and the proximal end of the connecting portion 11 is used to connect to the implant 1. The end portion 12 is for connecting the control assembly 20. The end portion 12 is, for example, a plate-shaped, block-shaped or spherical outer surface with a smooth curved surface, which can reduce the potential damage to the tumor cavity and blood vessel wall by the release area and the implant 1 released to the patient's diseased position. Further, the end portion 12 is spherical. The spherical end portion can be a perforated metal sphere. Further, the end portion 12 includes a first channel 121 and a second channel 122. The first channel 121 and the second channel 122 are respectively provided for the first control member 21 and the second control member 22 to penetrate through. The cross-sectional dimensions of the first channel 121 and the second channel 122 are respectively larger than the cross-sectional dimensions of the first control member 21 and the second control member 22, and are used for the withdrawal of the first control member 21 and the second control member 22. The cross-sectional shapes of the first channel 121 and the second channel 122 are matched with the first control member 21 and the control wire 221. Preferably, the first control member 21 and the control wire 221 are circular wires, and the first channel 121 and the second channel 122 are circular through holes. Of course, the end portion can also be ellipsoidal or other shapes with a smooth surface.

[0049] Preferably, as Figure 1 shown, the radial dimension of the end portion of the release member 10 is larger than the radial dimension of the internal cavity of the implant 1. For example, in this embodiment, the coil has an internal cavity structure. The end portion of the release member 10 is preferably a spherical end, and the diameter of the spherical end is larger than the inner diameter of the coil, preventing the release member 10 from passing into the internal cavity of the implant 1.

[0050] Preferably, as Figure 4As shown, the release mechanism further includes a push rod 30 which has a first cavity 31 and a second cavity 32. The first control member 21 passes through the first cavity 31, and the second control member 22 passes through the second cavity 32. The proximal end of the first control member 21 passes out of the first cavity 31, and the proximal end of the second control member 22 passes out of the second cavity 32. The first control member 21 and the push rod 30, and the second control member 22 and the push rod 30 move together or move relative to each other. In fact, the distal end of the control assembly 20 is connected to the distal end of the push rod 30, and the proximal end of the control assembly 20 is connected to the implant 1. Preferably, the distal ends of the first control member 21 and the second control member 22 are connected to the distal end of the push rod 30 and can move axially relative to the push rod 30. For example, the distal end of the push rod 30 is threadedly connected or snap-connected to the distal end of the first control member 21 and the distal end of the second control member 22. When the implant 1 is pushed into the patient's site or the implant 1 is moved, the push rod 30 and the control assembly 20 are connected to each other and move together. When the push rod 30 moves, the two are relatively stationary. When releasing the implant 1, the distal end of the control assembly 20 is detached from the push rod 30, and the first control member 21 or the second control member 22 can move relative to the push rod 30. The operator can move the first control member 21 or the second control member 22 while the push rod 30 remains stationary to disconnect the control assembly 20 from the implant 1. Preferably, the push rod 200 is made of a compliant polymer rod. The cross-section of the first cavity 31 is preferably circular to provide a passage for the first control member 21; the cross-section of the second cavity 32 is preferably circular to provide a passage for the second control member 22.

[0051] This embodiment also provides an embolization device, which includes: an implant 1, a catheter 40, and the release mechanism as described above. The implant 1 is connected to the release member 10 of the release mechanism. The catheter 40 has a cavity. The release mechanism and the implant 1 are disposed in the cavity, and the control assembly 20 of the release mechanism and the implant 1 are movable relative to the catheter 40. After the implant 1 is pushed out of the catheter 40, in the case where the control assembly 20 is not unlocked, the implant 1 can still be controlled by the control assembly 20 to achieve repositioning and retraction. The embolization device has the beneficial effects of the release mechanism, which will not be elaborated here. Other components and principles of the embolization device can refer to the prior art, which will not be elaborated here. The following will Figure 1 , Figures 5 to 7 introduce in detail the use process of the release mechanism.

[0052] First, as Figure 1 and Figure 5As shown, the operator places the release mechanism at the diseased position of the patient, pushes the push rod 30, and pushes the implant 1 out of the catheter 40.

[0053] Secondly, if the position of the implanted implant 1 is accurate. The operator disassembles the distal end of the control assembly 20 from the distal end of the catheter 40. Unlock the control assembly 20, as Figure 6 shown, pull out the first control member 21 and pull it away from the first channel 121. The first control member 21 moves relative to the push rod 30, and the first control member 21 disengages from the connecting ring 222. Subsequently, as Figure 7 shown, pull the second control member 22 away from the second channel 122 to release the implant 1. If the position of the implanted implant 1 is deviated. The operator pulls the push rod 30 and the control assembly 20 distally, and the implant 1 moves with the control assembly 20 to reposition the implant 1 until it reaches the accurate position. After that, unlock the control assembly 20.

[0054] Finally, withdraw the push rod 30 and the catheter 40 from the diseased position.

[0055] In summary, in a release mechanism and an embolization device provided by the present invention, the release mechanism is used to realize the release of the implant, and includes: a release member, a first control member, and a second control member; the proximal end of the release member is used to be connected to the implant; the first control member and the second control member both penetrate the release member, and the proximal ends of the first control member and the second control member are unlockably interlocked on the proximal side of the release member; wherein, when the first control member and the second control member are interlocked, the first control member, the second control member are connected to the release member; when the first control member and the second control member are unlocked, the connection between the first control member, the second control member and the release member is released. With such a setting, the first control member and the second control member can reposition and retract the implant connected to the release member. Moreover, the mechanical structure of the release mechanism is relatively simple, the processing technology is easier to implement, the reliability is good, and the feasibility is strong.

[0056] In addition, it should also be recognized that although the present invention has been disclosed above with preferred embodiments, the above embodiments are not intended to limit the present invention. For any person skilled in the art, without departing from the scope of the technical solution of the present invention, many possible changes and modifications can be made to the technical solution of the present invention by using the technical content disclosed above, or modified into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the scope of protection of the technical solution of the present invention.

Claims

1. A release mechanism for realizing the release of an implant, characterized in that, Comprising: A release member, a first control member, and a second control member; The proximal end of the release member is used to connect with the implant; Both the first control member and the second control member penetrate through the release member, and the proximal ends of the first control member and the second control member are interlocked in an unlockable manner on the proximal side of the release member; The release member has a first channel and a second channel, and the first control member and the second control member are respectively arranged to penetrate through the first channel and the second channel; Wherein, when the first control member and the second control member are interlocked, the first control member, the second control member are connected to the release member; when the first control member and the second control member are unlocked, the connection between the first control member, the second control member and the release member is released; The second control member includes a control guide wire and a connecting ring, the connecting ring is connected to the proximal end of the control guide wire, and the connecting ring sleeved on the first control member is located between the release member and the implant; the cross-sectional shapes of the first channel and the second channel are matched with the first control member and the control guide wire; When the connecting ring is sleeved on the first control member, the first control member and the second control member are interlocked; when the first control member is withdrawn from the connecting ring, the first control member and the second control member are unlocked.

2. The release mechanism according to claim 1, characterized in that, The second control member further includes a transition section, and the control guide wire and the connecting ring are connected through the transition section; the transition section is of equal diameter or variable diameter.

3. The release mechanism according to claim 1, characterized in that The proximal end of the first control member is further used to extend into the internal cavity of the implant.

4. The release mechanism according to claim 3, wherein, The length that the first control member passes through the connecting ring is greater than the distance that the first control member and the second control member drive the implant to move distally.

5. The release mechanism according to claim 1, characterized in that, The proximal end of the first control member has a bent portion, and the bent portion is connected to the connecting ring.

6. The release mechanism according to any one of claims 1-5, characterized in that The release member includes a connecting portion and an end portion, the distal end of the connecting portion is connected to the end portion, and the proximal end of the connecting portion is used to connect with the implant; the end portion has the first channel and the second channel, and the cross-sectional dimensions of the first channel and the second channel are respectively larger than the cross-sectional dimensions of the first control member and the second control member.

7. The release mechanism according to claim 6, characterized in that, The radial dimension of the end portion is larger than the radial dimension of the internal cavity of the implant.

8. The release mechanism according to claim 1, characterized in that, The release mechanism further includes a push rod, the push rod has a first cavity and a second cavity, the first control member and the second control member respectively penetrate through the first cavity and the second cavity; the distal ends of the first control member and the second control member are connected to the distal end of the push rod and can move axially relative to the push rod.

9. An embolization device, characterized in that, Comprising: An implant, a catheter, and a release mechanism according to any one of claims 1-8, the implant is connected to the release member of the release mechanism, the catheter has a cavity, the release mechanism and the implant are arranged in the cavity, and the release mechanism and the implant are movable relative to the catheter.

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