CN116158799A - Release mechanism and plug device - Google Patents

Abstract

The invention provides a release mechanism and an embolic device, wherein the release mechanism is used for realizing release of an implant and comprises the following components: the first control piece and the second control piece are connected with the release piece; the proximal end of the release member is adapted to connect with the implant; the first control piece and the second control piece are communicated with the release piece, and the proximal end of the first control piece and the proximal end of the second control piece are in unlocking interlocking connection on the proximal end side of the release piece; wherein the first control member, the second control member are connected with the release member when the first control member and the second control member are interlocked; and when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the disconnecting piece are disconnected. So configured, repositioning and retraction of the implant may be accomplished. And the mechanical structure of the release mechanism is relatively simple, and the processing technology is easier to realize.

Description

Release mechanism and plug device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a release mechanism and an embolism device.

Background

The embolic device is a common apparatus for endovascular embolization and occlusion, and is widely used for the treatment of intracranial aneurysms, embolization of the aorta and surrounding vessels, and post-graft endoleak filling. The embolic device comprises, for example, a coil of spring that is predisposed in the catheter in an approximately straightened state, the coil being released after being expelled from the catheter. In the clinic, doctors often need to reposition or adjust the release profile of the coils, requiring controlled release of the embolic device.

The spring coils are divided into a controllable coil and a pushing coil according to a release mechanism. Repositioning or retraction of the steerable loop, i.e., the spring loop, may be accomplished by a release mechanism while in or out of the catheter. However, the existing release mechanism of the controllable ring has a complex structure, extremely high requirements on the processing technology, extremely great challenges on production and processing, poor reliability and poor practicality. In addition, the release part of the release structure on the spring ring is not smooth enough, and potential damage risks are presented to tumor bodies and blood vessels. The pushing ring, namely the spring ring, can be pushed by the pushing guide wire in one direction until the guide wire is pushed out, 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 pushing out the catheter, and the repositioning and retraction functions cannot be achieved.

Accordingly, there is a need to develop a release mechanism and an embolic device that address at least the above-described problems.

Disclosure of Invention

The invention aims to provide a release mechanism and a embolism device, which are used for solving the problem that the existing release mechanism cannot realize repositioning and retracting.

In order to solve the above technical problems, the present invention provides a releasing mechanism for releasing an implant, which is characterized by comprising: the first control piece and the second control piece are connected with the release piece; the proximal end of the release member is adapted to connect with the implant; the first control piece and the second control piece are communicated with the release piece, and the proximal end of the first control piece and the proximal end of the second control piece are in unlocking interlocking connection on the proximal end side of the release piece; wherein the first control member, the second control member are connected with the release member when the first control member and the second control member are interlocked; and when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the release piece are disconnected.

Optionally, the second control member comprises a control guidewire and a connection ring, the connection ring being connected with the proximal end of the control guidewire; when the connecting ring is sleeved on the first control piece, the first control piece and the second control piece are interlocked; and when the first control piece is pulled away from the connecting ring, the first control piece and the second control piece are unlocked.

Optionally, the second control member further includes a transition section through which the control guidewire is connected with the connection ring; the transition section is arranged in an equal diameter or variable diameter mode.

Optionally, the proximal end of the first control member is further configured to extend into the interior cavity of the implant, and the connecting ring sleeved on the first control member is positioned between the release member and the implant.

Optionally, the length of the first control piece passing through the connecting ring is greater than the distance that the first control piece and the second control piece drive the implant to move towards the distal end.

Optionally, the proximal end of the first control member has a bend, which connects with the connecting ring.

Optionally, the release member comprises a connecting portion and an end portion, a distal end of the connecting portion being connected to the end portion, a proximal end of the connecting portion being for connection to the implant; the end part is provided with a first channel and a second channel, the first channel and the second channel are respectively provided with the first control piece and the second control piece in a penetrating way, and the cross section sizes of the first channel and the second channel are respectively larger than the cross section sizes of the first control piece and the second control piece.

Optionally, the radial dimension of the end portion is greater than the radial dimension of the internal cavity of the implant.

Optionally, the release mechanism further includes a pushing rod, where the pushing rod has a first cavity and a second cavity, and the first control element and the second control element are respectively disposed in the first cavity and the second cavity in a penetrating manner; the distal end of the first control member and the distal end of the second control member are connected with the distal end of the pushing rod and can move axially relative to the pushing rod.

In order to solve the above technical problem, the present invention further provides an embolic device, including: the implant, pipe and as described above, the implant with the tripping member of tripping mechanism is connected, the pipe has the cavity, tripping mechanism with the implant is located in the cavity, tripping mechanism and the implant is relative the pipe is movable.

In the release mechanism and the embolic device provided by the invention, the release mechanism is used for realizing release of an implant and comprises the following components: the first control piece and the second control piece are connected with the release piece; the proximal end of the release member is adapted to connect with the implant; the first control piece and the second control piece are communicated with the release piece, the proximal end of the first control piece and the proximal end of the second control piece are in interlocking connection with the release piece, and the interlocking connection can be achieved. Wherein when interlocked between the first control member and the second control member, the first control member, the second control member, and the release member are connected such that the first control member, the second control member are movable with the implant such that the first control member, the second control member can perform retracting and repositioning operations on the implant; when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the disconnecting piece are disconnected, and the implant connected with the disconnecting piece is released, so that the implant can be placed in a lesion of a patient.

Drawings

Those of ordinary skill in the art will appreciate that the figures are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

FIG. 1 is a schematic view of a release mechanism within a catheter according to an embodiment of the present invention.

Fig. 2 is a schematic view of a second control member according to an embodiment of the present invention.

Fig. 3 is a schematic view of a release member according to an embodiment of the present invention.

Fig. 4 is a schematic view of a pushing rod according to an embodiment of the present invention.

Fig. 5 is a schematic view of the release mechanism outside the catheter according to an embodiment of the invention.

Fig. 6 is a schematic diagram of the unlocking mechanism according to the embodiment of the invention.

Fig. 7 is a schematic view of a control assembly disconnected from an implant in accordance with an embodiment of the present invention.

Fig. 8 is a schematic view of another disengaging mechanism according to an embodiment of the present invention.

In the accompanying drawings:

1-an implant;

10-release member, 11-connection, 12-end, 121-first channel, 122-second channel;

20-control assembly, 21-first control, 211-bend, 22-second control, 221-control guidewire, 222-connecting ring, 223-transition;

30-pushing rod, 31-first cavity, 32-second cavity;

40-conduit.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.

As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The term "plurality" is generally used in a sense including "at least one," the term "at least two" is generally used in a sense including "two or more," and furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third" may include either explicitly or implicitly one or at least two of such features, and the terms "mounted", "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The term "proximal" refers to the end that is proximal to the lesion of the patient and the term "distal" refers to the end that is proximal to the operator's operation. Furthermore, as used in this disclosure, an element disposed on another element generally only refers to a connection, coupling, cooperation or transmission between two elements, and the connection, coupling, cooperation or transmission between two elements may be direct or indirect through intermediate elements, and should not be construed as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation, such as inside, outside, above, below, or on one side, of the other element unless the context clearly indicates otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.

In an embodiment of the present invention, there is provided a release mechanism and an embolic device, the release mechanism is used for releasing an implant, and includes: the first control piece and the second control piece are connected with the release piece; the proximal end of the release member is adapted to connect with the implant; the first control piece and the second control piece are communicated with the release piece, and the proximal end of the first control piece and the proximal end of the second control piece are in unlocking interlocking connection on the proximal end side of the release piece; wherein the first control member, the second control member are connected with the release member when the first control member and the second control member are interlocked; and when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the disconnecting piece are disconnected. The arrangement is such that the first control member and the second control member can reposition and retract the implant connected to the release member. And moreover, the mechanical structure of the release mechanism is relatively simple, the processing technology is easier to realize, the reliability is good, and the practicability is strong.

The following description refers to the accompanying drawings.

Referring to fig. 1 to 7, fig. 1 is a schematic view of a disengaging mechanism in a catheter according to an embodiment of the invention; FIG. 2 is a schematic view of a second control member according to an embodiment of the present invention; FIG. 3 is a schematic view of a release member and an attachment guidewire according to an embodiment of the present invention; FIG. 4 is a schematic view of a pushing rod according to an embodiment of the present invention; FIG. 5 is a schematic view of the disengaging mechanism outside a catheter according to an embodiment of the present invention; FIG. 6 is a schematic diagram of an embodiment of the present invention after the release mechanism is unlocked; FIG. 7 is a schematic illustration of the control assembly disconnected from the implant in accordance with an embodiment of the present invention;

fig. 8 is a schematic view of another disengaging mechanism according to an embodiment of the present invention.

Referring to fig. 1, the present embodiment provides a release mechanism for releasing an implant, so that the release mechanism can control the retraction of the implant. The release mechanism includes: the release member 10 and the control assembly 20, the control assembly 20 comprises a first control member 21 and a second control member 22.

Referring to fig. 1, the proximal end of the release member 10 is adapted to be coupled to the implant 1. The implant 1 is for example an embolic element. Further, the implant 1 is a spring coil. In this embodiment, the implant 1 is exemplified as a spring coil. It should be understood that in this embodiment, the "proximal" end refers to the end that is proximal to the lesion of the patient and the "distal" end refers to the end that is proximal to the operator.

With continued reference to fig. 1, the control assembly 20 includes a first control member 21 and a second control member 22, wherein the first control member 21 and the second control member 22 penetrate through the release member 10, and a proximal end of the first control member 21 and a proximal end of the second control member 22 are in an interlocking connection that is unlocked at a proximal end side of the release member 10. It should be noted that, the interlocking connection between the proximal end of the first control member 21 and the proximal end of the second control member 22 at the proximal end side of the release member 10 means that when the proximal end of the first control member 21 and the proximal end of the second control member 22 are in interlocking connection, that is, when the proximal end of the first control member 21 and the proximal end of the second control member 22 are in interlocking connection, they can drive the release member 10 to move simultaneously, and when the proximal end of the first control member 21 and the proximal end of 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.

Further, in the present embodiment, when the first control member 21 and the second control member 22 are interlocked, the first control member 21 and 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 proximally or distally, so that the control assembly 20 can perform a retracting operation on the implant 1, and a repositioning or retracting function of the release mechanism on the implant 1 inside or outside the catheter is realized. Preferably, the control assembly 20 can drive the implant 1 to move distally when the release member 10 and the implant 1 need to move distally. When the first control member 21 and the second control member 22 are unlocked, the first control member 21, the second control member 22 and the release member 10 are disconnected, and the release member 10 is released, i.e. the implant 1 connected to the release member 10 is released, so that the implant 1 can be placed in the lesion of the patient. This arrangement enables the release mechanism to achieve complete control of the implant 1 prior to the active release operation, allowing the control assembly 20 to reposition and retract the implant 1. And moreover, the mechanical structure of the release mechanism is relatively simple, the processing technology is easier to realize, the reliability is good, and the practicability is strong.

In this embodiment, the interlock between the first and second control members 21, 22 may be an interconnected mechanical structure. For example, the first control member 21 is disposed on the second control member 22 in a penetrating manner, or the second control member 22 is disposed on the first control member 21 in a sleeved manner, and the first control member 21 is provided with a device for preventing the second control member 22 from slipping, so as to realize interlocking. When unlocked, the first control member 21 releases the second control member 22 to effect disengagement of the two. For another example, the first control member 21 and the second control member 22 are mutually hooked to realize interlocking, the force of the mutual hooking is larger than the force for moving the implant 1 towards the distal end, and when the implant is unlocked, the hooked structures are mutually struggled to realize disengagement.

Preferably, with continued reference to fig. 1 and 2, the second control member 22 includes a control wire 221 and a connecting ring 222, the connecting ring 222 being connected to the proximal end of the control wire 221. The connecting ring 222 is used to fit over the first control member 21, that is, the proximal end of the first control member 21 passes through the connecting ring 222. The first control member 21 is for example a guide wire. More preferably, the connecting ring 222 is in clearance fit with the first control member 21. When the connecting 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 pulled away from the connecting ring 222, the first control member 21 is unlocked from the second control member 22. Preferably, the first control member 21 may be a rigid wire, and may be made of stainless steel, nickel titanium, or the like, and the cross section thereof may be circular or square, which is not limited herein. Further, the control guidewire 221 of the second control 22 may also be a rigid wire. The connecting ring 222 of the second control member 22 may be an annular flexible polymer wire, which may be straightened to be pulled away from the release member 10 after being stressed.

More preferably, as shown in fig. 2, the second control member 22 further includes a transition section 223, and the control wire 221 is connected to the connection ring 222 through the transition section 223. Specifically, the connection ring 222 is a ring formed by folding a wire in half, that is, the wire is fixed by the transition section 223 after being folded in half. The transition section 223 may also be of constant diameter or variable diameter, preferably a constant diameter or variable diameter circular tube. When the doubled-over wire is formed to have a radial dimension greater than the radial dimension of the control guidewire 221, the transition 223 is configured to be variable in diameter, i.e., the doubled-over wire has a radial dimension greater than the radial dimension of the control guidewire 221. The transition section 223 may be metal or polymer. The control guide wire 221 and the connection ring 222 may be connected by bonding if a polymer material is selected, or may be connected by bonding or mechanical clamping if a metal material is selected. The mechanical clamping is, for example, an interference fit at the connection of the transition section 223 and the connection ring 222.

Preferably, as shown in fig. 1, the proximal end of the first control member 21 is disposed through the release member 10, and the proximal end of the first control member 21 is further configured 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.

Preferably, as shown in fig. 1, the length of the first control member 21 passing through the connection ring 222 is greater than the distance the control assembly 20 moves the implant 1 distally. When it is desired to move the implant 1, the first control member 21 and the second control member 22 of the control assembly 20 together pull the implant 1 distally. Despite the synchronous movement, a relative slip between the first control member 21 and the connecting ring 222 is possible, so that the length of the first control member 21 passing through the connecting ring 222 is greater than the distance the implant moves, avoiding slipping of the connecting ring 222. It should be appreciated that the length of the first control member 21 passing through the connecting ring 222 means the length of the proximal end of the first control member 21 passing through the connecting ring 222, and the length of the portion of the first control member 21 that is sleeved on the connecting ring 222 is greater than the distance the implant 1 moves.

Preferably, as shown in fig. 8, the proximal end of the first control member 21 has a curved portion 211, and the curved portion 211 of the first control member 21 is connected to the connection ring 222, so as to prevent the connection ring 222 from falling off the first control member 21. That is, the bending portion 211 of the first control member 21 abuts against the connection ring 222 to hook the connection ring 222, so that the first control member 21 is connected with the second control member 22 without being separated. Further, the material used for the first control member 21 may be a flexible polymer material, so that the bending portion of the first control member 21 is more easily separated from the connection ring 222 when the first control member 21 is pulled.

More preferably, as shown in fig. 3, the release member 10 comprises a connecting portion 11 and an end portion 12, the distal end of the connecting portion 11 being connected to the end portion 12, the proximal end of the connecting portion 11 being adapted to be connected to the implant 1. The end 12 is adapted for connection to the control assembly 20. The outer surface of the end portion 12, which may be plate-shaped, block-shaped or spherical, is a smooth curved surface, so that potential damage to the tumor cavity and the vessel wall of the implant 1 after the release area and the lesion site of the patient are reduced. Further, the end portion 12 is spherical. The bulbous end may be a metal sphere with a hole. Further, the end 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 pass through, and 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, so as to provide for the first control member 21 and the second control member 22 to be pulled out. The cross-sectional shapes of the first passage 121 and the second passage 122 are matched with those of the first control member 21 and the control guide wire 221. Preferably, the first control member 21 and the control guide wire 221 are circular guide wires, and the first channel 121 and the second channel 122 are circular through holes. Of course, the end portions may also be ellipsoidal or have other shapes with smooth surfaces.

More preferably, as shown in fig. 1, the radial dimension of the end of the release member 10 is greater than the radial dimension of the internal cavity of the implant 1. For example, in this embodiment, the spring ring has an internal cavity structure. The end of the release member 10 is preferably, for example, a bulbous end having a diameter greater than the inner diameter of the spring coil, preventing the release member 10 from passing into the interior cavity of the implant 1.

Preferably, as shown in fig. 4, the release mechanism further includes a push rod 30, where the push rod 30 has a first cavity 31 and a second cavity 32, the first control member 21 is disposed through the first cavity 31, and the second control member 22 is disposed through the second cavity 32. The proximal end of the first control member 21 extends out of the first cavity 31 and the proximal end of the second control member 22 extends 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 practice, the distal end of the control assembly 20 is connected to the distal end of said push rod 30 and the proximal end of the control assembly 20 is connected to the implant 1. Preferably, the distal end of the first control member 21, the distal end of the second control member 22 are connected to the distal end of the push rod 30 and are axially movable relative to the push rod 30. For example, the distal end of the push rod 30 is threaded or snap-fit with the distal end of the first control member 21 and with the distal end of the second control member 22. When the implant 1 is pushed into the patient or the implant 1 is moved, the push rod 30 is interconnected with the control assembly 20, the push rod 30 moves together with the control assembly 20, and 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, the first control member 21 or the second control member 22 is movable relative to the push rod 30, and the operator can move the first control member 21 or the second control member 22, and the push rod 30 remains stationary, thereby releasing the control assembly 20 from the implant 1. Preferably, the pushing rod 200 is a flexible polymer rod. The first cavity 31 is preferably circular in cross-section, providing a passage for the first control member 21; the second cavity 32 is preferably circular in cross-section to provide a passageway for the second control member 22.

The present embodiment also provides an embolic device comprising: implant 1, catheter 40 and a release mechanism as described above, said implant 1 being connected to a release member 10 of said release mechanism. The catheter 40 has a cavity, the release mechanism and the implant 1 being provided in the cavity, the control assembly 20 of the release mechanism and the implant 1 being movable relative to the catheter 40. After the implant 1 is pushed out of the catheter 40, the implant 1 can also be controlled by the control assembly 20 to achieve repositioning and withdrawal without unlocking the control assembly 20. The embolic device has the beneficial effects of the release mechanism and is not described in detail herein. The other components and principles of the embolic device may be referenced to the prior art and are not described in detail herein. The following describes in detail the use of the release mechanism in connection with fig. 1, 5 to 7.

First, as shown in fig. 1 and 5, the operator places the release mechanism into the lesion of the patient, pushes the push rod 30, and pushes the implant 1 out of the catheter 40.

Secondly, if the position of the implanted implant 1 is accurate. The operator removes the distal end of the control assembly 20 from the distal end of the catheter 40. The unlocking control assembly 20, as shown in fig. 6, pulls the first control member 21 out of the first channel 121, the first control member 21 moves relative to the push rod 30, and the first control member 21 disengages the connecting ring 222. Subsequently, as shown in fig. 7, the second control member 22 is pulled away from the second channel 122, effecting release of the implant 1. If the position of the implanted implant 1 deviates. The operator pulls the push rod 30 and the control assembly 20 distally, and the implant 1 follows the control assembly 20, effecting repositioning of the implant 1 until the correct position is reached. Thereafter, the control assembly 20 is unlocked.

Finally, the push rod 30 and catheter 40 are withdrawn from the lesion.

In summary, in the release mechanism and the embolic device provided by the present invention, the release mechanism is used for releasing an implant, and includes: the first control piece and the second control piece are connected with the release piece; the proximal end of the release member is adapted to connect with the implant; the first control piece and the second control piece are communicated with the release piece, and the proximal end of the first control piece and the proximal end of the second control piece are in unlocking interlocking connection on the proximal end side of the release piece; wherein the first control member, the second control member are connected with the release member when the first control member and the second control member are interlocked; and when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the disconnecting piece are disconnected. The arrangement is such that the first control member and the second control member can reposition and retract the implant connected to the release member. And moreover, the mechanical structure of the release mechanism is relatively simple, the processing technology is easier to realize, the reliability is good, and the practicability is strong.

It should also be appreciated that while the present invention has been disclosed in the context of a preferred embodiment, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A release mechanism for effecting release of an implant, comprising: the first control piece and the second control piece are connected with the release piece;

the proximal end of the release member is adapted to connect with the implant;

the first control piece and the second control piece are communicated with the release piece, and the proximal end of the first control piece and the proximal end of the second control piece are in unlocking interlocking connection on the proximal end side of the release piece;

wherein the first control member, the second control member are connected with the release member when the first control member and the second control member are interlocked; and when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the release piece are disconnected.

2. The release mechanism of claim 1, wherein the second control member comprises a control guidewire and a connecting ring connected to a proximal end of the control guidewire;

when the connecting ring is sleeved on the first control piece, the first control piece and the second control piece are interlocked; and when the first control piece is pulled away from the connecting ring, the first control piece and the second control piece are unlocked.

3. The release mechanism of claim 2, wherein the second control member further comprises a transition section through which the control guidewire is connected to the connecting ring; the transition section is arranged in an equal diameter or variable diameter mode.

4. The release mechanism of claim 2, wherein the proximal end of the first control member is further configured to extend into the interior cavity of the implant, the connecting ring over the first control member being positioned between the release member and the implant.

5. The release mechanism of claim 4, wherein a length of the first control member passing through the connecting ring is greater than a distance that the first control member and the second control member move the implant distally.

6. The release mechanism of claim 2, wherein the proximal end of the first control member has a bend that is connected to the connecting ring.

7. The release mechanism of any one of claims 1-6, wherein the release member comprises a connecting portion and an end portion, a distal end of the connecting portion being connected to the end portion, a proximal end of the connecting portion being for connection to the implant; the end part is provided with a first channel and a second channel, the first channel and the second channel are respectively provided with the first control piece and the second control piece in a penetrating way, and the cross section sizes of the first channel and the second channel are respectively larger than the cross section sizes of the first control piece and the second control piece.

8. The release mechanism of claim 7, wherein a radial dimension of the end portion is greater than a radial dimension of the interior cavity of the implant.

9. The release mechanism of claim 1, further comprising a push rod having a first cavity and a second cavity, the first control member and the second control member being disposed through the first cavity and the second cavity, respectively; the distal end of the first control member and the distal end of the second control member are connected with the distal end of the pushing rod and can move axially relative to the pushing rod.

10. An embolic device, comprising: an implant, a catheter and a release mechanism according to any one of claims 1-9, the implant being connected to a release member of the release mechanism, the catheter having a cavity, the release mechanism and the implant being disposed within the cavity, the release mechanism and the implant being movable relative to the catheter.

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