Embolism filler releasing mechanism

Abstract

The invention provides a releasing mechanism for embolism filler, and belongs to the technical field of medical instruments. The releasing mechanism comprises embolism filler, a pushing rod, a pushing wire, a first limiting structure and a second limiting structure, the pushing rod is provided with a pipe cavity extending in the axial direction, and the far end of the pushing rod is detachably connected with the embolism filler and used for pushing the embolism filler to the filling position; the pushing wire is arranged in a pipe cavity of the pushing rod; the first limiting structure is fixedly arranged at the far end of the pushing wire; the second limiting structure is fixedly arranged at the near end of the embolism filler and is provided with a fixing part and a limiting part which are integrally and fixedly connected, the fixing part is fixedly connected with the near end of the embolism filler, and the limiting part is detachably connected with the first limiting structure; after the limiting part completely extends into the pushing rod, the outer side face, facing the pushing rod, of the fixing part abuts against the far-end end face of the pushing rod; the technical problem that an existing releasing mechanism for the embolism filler cannot be stably connected with the embolism filler, and consequently the embolism filler is not easy to push is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a release mechanism for an embolic filler. Background Art

[0002] At present, the most commonly used embolic filler in interventional surgery is the spring coil. After the spring coil enters the target blood vessel, it stays in the blood vessel with similar diameter to form a mechanical embolism. Thrombosis may often occur around the embolus and at the distal end of the embolized blood vessel, causing local blood flow interruption. It is mostly used to embolize small arteries or arteriovenous fistulas. There are many ways to release the spring coil, among which mechanical release is more convenient and quick.

[0003] For example, the Chinese invention patent with the document number CN 113288294A discloses a therapeutic device, which includes a push rod, a first limiting part, a second limiting part, a push wire and a spring coil. The push rod has an axially through inner cavity, a first release hole is provided on the push rod, the first release hole is connected to the inner cavity, the push wire is used to drive the first limiting part to move, the second limiting part is connected to the spring coil through a section of connecting wire, and the spring coil is arranged outside the inner cavity. Before release, the therapeutic device is in a locked position, at which time, the second limiting part is limited by the first limiting part in the inner cavity of the push rod to prevent the second limiting part from escaping from the inner cavity from the first distal end. When release is required, the push wire drives the first limiting part to move toward the proximal end under the action of external force. At the first release hole, the first limiting part squeezes the second limiting part, so that the second limiting part retreats toward the first release hole, so that the first limiting part can pass through the second limiting part. At this time, the first limiting part no longer limits the second limiting part, so that the second limiting part can escape from the inner cavity from the distal end to complete the release of the spring coil.

[0004] In the above technical solution, before release, the spherical second limiter on the spring coil limits the maximum distance between the spring coil and the distal end of the push rod through the spherical first limiter on the release wire. Although the second limiter cannot be separated from the distal end position of the first limiter, within the length range of the connecting wire, the spring coil can move axially in the inner cavity at the distal end of the push rod through the second limiter, which will cause the spring coil to be unable to be pushed smoothly; in addition, the limiting method in the above technical solution makes the spring coil and the push rod unable to be coaxial, and thus the force on the push rod cannot be stably transmitted to the spring coil, further affecting the smooth pushing of the spring coil, especially for longer and easily deformed spring coils, which further increases the difficulty of pushing.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The purpose of the present invention is to provide a release mechanism for an embolic filler, which is used to solve the technical problem that the release mechanism of the existing embolic filler cannot stably connect the embolic filler, resulting in the embolic filler being difficult to push.

[0007] In order to achieve the above-mentioned purpose, the embolic filler of the present invention provides the following technical solutions:

[0008] A release mechanism for an embolic filling material, comprising:

[0009] Embolic fillings;

[0010] A push rod, wherein the push rod has an axially extending lumen, and the distal end of the push rod is detachably connected to the embolic filler, and is used to push the embolic filler to a set filling position;

[0011] A push wire, which is disposed in the lumen of the push rod and extends axially along the lumen;

[0012] A first limiting structure, wherein the first limiting structure is fixedly provided with a distal end of the push wire;

[0013] A second limiting structure, wherein the second limiting structure is fixedly arranged at the proximal end of the embolic filler, the second limiting structure comprises a fixing portion and a limiting portion which are integrally fixedly connected, the fixing portion is fixedly connected to the proximal end of the embolic filler, the limiting portion completely extends into the tubular cavity at the distal end of the push rod and is detachably connected to the first limiting structure, and after the limiting portion completely extends into the push rod, the fixing portion abuts against the distal end surface of the push rod toward the outer side surface of the push rod.

[0014] As a further optimized technical solution, the fixing part is a cylindrical structure, and a groove with a shape matching the proximal end of the embolic filler is coaxially arranged on the fixing part. The proximal end of the embolic filler is inserted into the groove and fixedly connected to the groove.

[0015] As a further optimized technical solution, the limiting portion is arranged on a side of the fixing portion away from the groove, the limiting portion is coaxially arranged with the groove, and the limiting portion is coaxially arranged with the pushing rod after penetrating into the lumen of the pushing rod.

[0016] As a further optimized technical solution, the limiting portion has an extending section and a limiting section that are integrally fixedly connected, the extending section is arranged between the fixing portion and the limiting section, the radial dimension of the extending section is smaller than the radial dimension of the limiting section, the tubular cavity at the distal end of the push rod has a reduced diameter section whose diameter is adapted to the extending section, and the limiting portion can be radially telescopically deformed so that when the embolic filler is released, the limiting section is disconnected from the first limiting structure and moves along the reduced diameter section in a direction away from the push rod, so as to detach from the push rod.

[0017] As a further optimized technical solution, the limiting portion is a hollow cylindrical structure composed of a plurality of sub-clips arranged at intervals in the circumferential direction, and the distal ends of all the sub-clips are fixedly connected to the proximal end of the fixing portion.

[0018] As a further optimized technical solution, the first limiting structure is a block with a radial size larger than the push wire, and the limiting portion has a slot adapted to at least part of the structure of the block, and the slot is used for detachable connection with the block.

[0019] As a further optimized technical solution, the block is spherical in shape.

[0020] As a further optimized technical solution, the depth of the groove is not greater than the radius of the block, and the proximal end of the push wire is fixedly connected to the lumen so that the spherical block presses against the groove.

[0021] As a further optimized technical solution, an annular groove extending axially is provided on the outer side wall of the proximal end of the push rod. The annular groove is arranged on the side away from the proximal end of the connection between the push rod and the push wire. The push wire can be withdrawn from the proximal end of the lumen by breaking the push rod at the position of the annular groove.

[0022] As a further optimized technical solution, a cutting groove extending in an axial spiral is provided on a portion of the outer side wall of the push rod near the distal end.

[0023] Beneficial effect: The embolic filler release mechanism of the present invention sets a second limiting structure at the proximal end of the embolic filler, and the fixed part of the second limiting structure is used to fix the embolic filler, and the limiting part is used to flexibly connect with the first limiting structure to realize the pushing and releasing of the embolic filler. In the process of pushing the embolic filler, the limiting part is completely extended into the pushing rod, and the fixed part faces the outer side surface of the pushing rod and abuts against the distal end surface of the pushing rod. At this time, the pushing force of the pushing rod is stably transmitted to the embolic filler through the fixed part. Compared with the prior art, the embolic filler will not have axial movement during the pushing process, and the pushing force on the pushing rod can also be stably transmitted to the embolic filler, thereby reducing the difficulty of pushing and improving the efficiency of surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the structure of a push rod according to an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the internal structure of a push rod according to an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the structure of an embolic filler according to an embodiment of the present invention;

[0029] Figure 5 It is a structural schematic diagram of a second limiting structure according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of a connection state between an embolic filler and a pushing rod when being pushed according to an embodiment of the present invention;

[0031] Figure 7 A schematic structural diagram of a buffer component according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the release process of the embolic filler according to an embodiment of the present invention.

[0033] In the figure: 1. embolic filler; 2. push rod; 201. tubular cavity; 202. reduced diameter section; 203. annular groove; 204. cutting groove; 3. push wire; 4. first limiting structure; 5. second limiting structure; 501. fixing part; 502. limiting part; 503. groove; 6. buffer component; 7. fixing pad. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0035] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In addition, the term "proximal end" uniformly refers to the end close to the operator, and the "distal end" refers to the end away from the operator.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0037] The present invention provides a release mechanism for an embolic filler. The first limiting structure is arranged at the distal end of a pushing wire, and the second limiting structure is arranged at the proximal end of the embolic filler. During the pushing process of the embolic filler, the limiting portion of the second limiting structure completely penetrates into the lumen from the distal end of the pushing rod and is connected to the first limiting structure on the pushing wire, and the fixed portion of the second limiting structure abuts against the end face of the distal end of the pushing rod, so that the embolic filler is stably connected to the pushing rod, and the pushing force of the pushing rod can be stably transmitted to the embolic filler, thereby ensuring the stability of the pushing process of the embolic filler and improving the pushing efficiency of the embolic filler.

[0038] Example 1

[0039] like Figure 1 As shown, the release mechanism of the embolic filler includes the embolic filler 1, a pushing rod 2, a pushing wire 3, a first limiting structure 4 and a second limiting structure 5.

[0040] In this embodiment, the embolic filler 1 is a spring coil, which is made of platinum-tungsten alloy and is processed into a spiral spring shape by using platinum-tungsten alloy. Platinum-tungsten alloy is a shape memory alloy, and the spring coil can be formed into various three-dimensional shapes through high-temperature heat treatment. Figure 7 As shown, a spherical buffer component 6 is fixedly provided at the distal end of the spring coil to reduce the impact damage of the distal end of the spring coil on the blood vessel wall during the pushing process of the spring coil. In other embodiments, the embolic filler 1 can also be a substance for treating vascular embolism such as gelatin sponge, anhydrous alcohol, stainless steel coil, PVA particles, drug-loaded microspheres, etc.

[0041] like Figure 2 , Figure 3As shown, the push rod 2 has an axially extending lumen 201, and the distal end of the push rod 2 is detachably connected to the spring coil for pushing the spring coil to a set filling position. The push rod 2 needs to be pushed along the blood vessel during actual use, so it needs to have a certain degree of flexibility. The flexibility of the push rod 2 can be achieved by selecting a specific material or by improving the structure of the push rod 2. In this embodiment, the push rod 2 is made of a thin-walled stainless steel tube, and a cutting groove 204 is provided on the outer wall of the push rod 2 at least near the distal end by laser cutting, and the cutting groove 204 extends around the axial spiral of the push rod 2. In this way, at least the distal end of the push rod 2 can have better flexibility, thereby ensuring that the distal end of the push rod 2 is easier to advance along the blood vessel. In other embodiments, the cutting groove 204 can also be opened along the outer wall of the push rod 2 as a whole, thereby ensuring the overall flexibility of the push rod 2. In addition, when the cutting groove 204 is opened, the width can also vary uniformly. For example, the width of the cutting groove 204 gradually increases from the proximal end to the distal end, which can ensure the flexibility of the distal end of the push rod 2 and the transmission performance of the proximal end of the push rod.

[0042] like Figure 3 , Figure 6 As shown, the diameter of the push wire 3 is smaller than the diameter of the lumen 201, and the push wire 3 is installed in the lumen 201 of the push rod 2 and extends axially along the lumen 201, and is used to cooperate with the push rod 2 to fix or release the spring coil. The first limiting structure 4 is fixedly arranged at the distal end of the push wire 3.

[0043] like Figure 4 , Figure 5 , Figure 6 As shown, the second limiting structure 5 is fixedly arranged at the proximal end of the spring coil. The second limiting structure 5 comprises a fixing portion 501 and a limiting portion 502 which are fixedly connected in one piece, the fixing portion 501 being fixedly connected to the proximal end of the spring coil, specifically, the fixing portion 501 is a cylindrical structure, and a circular groove 503 which is coaxially arranged with the fixing portion 501 is provided on the end surface of one end of the fixing portion 501 facing the spring coil, the radial dimension of the groove 503 is adapted to the outer diameter dimension of the spring coil, when the fixing portion 501 fixes the spring coil, the proximal end of the spring coil is inserted into the groove 503, and is clamped and fixed in the groove 503, or in order to further ensure the stability of the connection between the fixing portion 501 and the groove 503, the spring coil and the groove 503 can be welded or adhesively fixed on the basis of the spring coil being clamped into the groove 503.

[0044] The limiting portion 502 is fully extended into the tubular cavity 201 at the distal end of the push rod 2 and is detachably connected to the first limiting structure 4. During the spring coil pushing process, the spring coil needs to be connected to the push rod 2. After the limiting portion 502 is fully extended into the push rod 2, the outer side of the fixing portion 501 facing the push rod 2 abuts against the distal end surface of the push rod 2. In this way, the pushing force of the push rod 2 can be stably transmitted to the spring coil through the fixing portion 501, thereby ensuring the stability of the spring coil sending process and reducing the pushing difficulty. After the spring coil is pushed to the set position, the limiting portion 502 is disconnected from the first limiting structure 4 to achieve the release of the spring coil.

[0045] Furthermore, the limiting portion 502 is arranged on the side of the fixing portion 501 away from the groove 503, and the limiting portion 502 is arranged coaxially with the groove 503. When the spring coil is fixed on the pushing rod 2, the limiting portion 502 penetrates into the lumen 201 of the pushing rod 2 and is arranged coaxially with the pushing rod 2. In this way, it can be ensured that when the spring coil is pushed, the pushing rod 2 is arranged coaxially with the spring coil, further improving the smoothness of pushing the spring coil.

[0046] like Figure 5 , Figure 6 As shown, the limiting portion 502 has an extending section and a limiting section that are integrally fixedly connected, the extending section is arranged between the fixing portion 501 and the limiting section, the radial dimension of the extending section is smaller than the radial dimension of the limiting section, the tubular cavity 201 at the distal end of the push rod 2 has a reduced diameter section 202 whose diameter is adapted to the extending section, and the limiting portion 502 can be radially telescopically deformed, so that when the spring coil is released, the limiting section is disconnected from the first limiting structure 4, and the limiting portion 502 moves along the reduced diameter section 202 in a direction away from the push rod 2, so as to be separated from the push rod 2.

[0047] In this embodiment, the limiting portion 502 is a hollow cylindrical structure composed of a plurality of sub-clips arranged at intervals in the circumferential direction, and the distal ends of all the sub-clips are fixedly connected to the proximal end of the fixing portion 501. Thus, after the limiting segment is disconnected from the first limiting structure 4, when the push rod 2 is pulled backward from the proximal end, the reduced diameter segment 202 at the distal end of the push rod 2 squeezes the sub-clips, so that all the sub-clips are radially contracted in the direction close to the axis, so that the limiting segment is smoothly disengaged from the reduced diameter segment 202.

[0048] In order to allow the limiting section to enter the contraction section more smoothly after the limiting section is disconnected from the first limiting structure 4, the outer side surface of the limiting section has a set angle with the axial direction, so that the outer side surface of the limiting section is conical, and the small diameter end of the cone faces the fixing part 501. Correspondingly, a guide section adapted to the limiting section is provided at the proximal end of the contraction section 202. In this way, after the limiting part 502 completely penetrates into the lumen 201 of the push rod 2, the limiting section is stuck in the guide section. At this time, since the limiting section is tightened by the first limiting structure 4, the limiting section will not shrink radially. The spring coil is now in a connection state with the push rod 2. When the spring coil needs to be released, the first limiting structure 4 is disconnected from the limiting section, and the first limiting structure 4 no longer radially tightens the limiting section, and the push rod 2 is pulled backward. The guide section squeezes the limiting section, so that the limiting section shrinks radially until it is separated from the push rod 2 along the contraction section 202.

[0049] Among them, in the present invention, the detachable connection between the limiting portion 502 and the first limiting structure 4 can be a snap connection or a limit docking, so as to facilitate the release of the spring coil. For example, when it is a snap connection, the limiting portion 502 is a slot, and the first limiting structure 4 is a block that matches the slot, and the diameter of the block is larger than the push wire 3. When pushing the spring coil, the block is stuck in the slot, so that the spring coil can be fixed and then the far end of the push rod 2 can be pushed. When the spring coil needs to be released, the push wire 3 is pulled outward from the proximal end of the push rod 2 to make the first limiting structure 4 break away from the limit of the limiting portion 502, and then the push rod 2 is pulled outward to finally release the spring coil.

[0050] The clamping mode of the above-mentioned limiting part 502 and the first limiting structure 4 requires a high tensile strength of the pushing wire 3 because it needs to apply force to pull the pushing wire 3 when releasing, resulting in a high production cost. In order to solve this problem, in the present embodiment, the clamping block is spherical in shape, and the depth of the clamping groove is not greater than the radius of the clamping block. In this way, the clamping block and the clamping groove are limitedly docked, but it is necessary to ensure that the pushing wire 3 with a certain axial support force is always pressed against the clamping block to ensure the stability of the connection between the clamping block and the clamping groove. In order to avoid the need to disperse energy to drive the pushing wire 3 to press against the limiting part 502 during the surgical operation, the proximal end of the pushing wire 3 is fixedly connected to the lumen 201 so that the spherical clamping block presses against the clamping groove. Specifically, when fixing the pushing wire 3, a fixed liner 7 is firstly sleeved on the proximal end of the pushing wire 3, and radial pressure is applied on the outer wall of the pushing rod 2 so that the pushing wire 3 is fixed to the proximal end of the pushing rod 2. In this way, a stable connection between the spring coil and the pushing rod 2 before release is achieved. When the spring coil needs to be released, the connection between the push wire 3 and the push rod 2 is disconnected. At this time, the first limiting structure 4 no longer presses the card slot, and the push wire 3 is directly pulled out of the push rod 2. At the same time, the push rod 2 is pulled outward to release the spring coil.

[0051] Specifically, when releasing the spring coil, in order to facilitate disconnection of the push wire 3 and the push rod 2, an annular groove 203 extending axially is provided on the outer side wall of the proximal end of the push rod 2. The annular groove 203 is provided on the side of the connection between the push rod 2 and the push wire 3 away from the proximal end. The setting of the annular groove 203 creates a weak position at the proximal end of the push rod 2, thereby facilitating destruction of the push rod 2 at the position of the annular groove 203. In this way, the push wire 3 can be withdrawn from the proximal end of the lumen 201 by breaking the push rod 2 at the position of the annular groove 203.

[0052] When using, Figure 8 As shown, first, before the spring coil is pushed, the spring coil is fixedly connected to the push rod 2 through the second limiting structure 5. At this time, the fixing portion 501 of the second limiting structure 5 faces the outer side of the push rod 2 and abuts against the distal end surface of the push rod 2. The pushing force of the push rod 2 is stably transmitted to the spring coil through the fixing portion 501. For details, please refer to Figure 8 (a).

[0053] When the spring coil is pushed into place, the push rod 2 is broken at the proximal ring groove 203 of the push rod 2, and the end of the push rod 2 fixing the push wire 3 is pulled outward. For details, please refer to Figure 8 (b).

[0054] Then, the push rod 2 is pulled outward at the same time. At this time, the limit portion 502 contracts radially and enters the reduced diameter section 202 of the lumen 201. For details, please refer to Figure 8 (c).

[0055] Then continue to pull the push rod 2 outward, the limit portion 502 leaves the push rod 2, and the spring coil is released. For details, please refer to Figure 8 (d).

[0056] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A release mechanism for an embolic filling material, characterized in that: include: Embolic fillings (1); A push rod (2), the push rod (2) having an axially extending lumen (201), the distal end of the push rod (2) being detachably connected to the embolic filler (1), and being used for pushing the embolic filler (1) to a set filling position; A push wire (3), wherein the push wire (3) is arranged in the lumen (201) of the push rod (2) and extends axially along the lumen (201); A first limiting structure (4), wherein the first limiting structure (4) is fixedly disposed at the distal end of the push wire (3); A second limiting structure (5), the second limiting structure (5) is fixedly arranged at the proximal end of the embolic filler (1), the second limiting structure (5) comprises a fixing portion (501) and a limiting portion (502) which are integrally fixedly connected, the fixing portion (501) is fixedly connected to the proximal end of the embolic filler (1), the limiting portion (502) is fully extended into the tubular cavity (201) at the distal end of the push rod (2) and is detachably connected to the first limiting structure (4), after the limiting portion (502) is fully extended into the push rod (2), the outer side surface of the fixing portion (501) facing the push rod (2) abuts against the distal end surface of the push rod (2).

2. The release mechanism of the embolic filler according to claim 1, characterized in that: The fixing portion (501) is a cylindrical structure, and a groove (503) whose shape matches the proximal end of the embolic filler (1) is coaxially arranged on the fixing portion (501). The proximal end of the embolic filler (1) is inserted into the groove (503) and fixedly connected to the groove (503).

3. The release mechanism of the embolic filler according to claim 2, characterized in that: The limiting portion (502) is arranged on a side of the fixing portion (501) away from the groove (503), and the limiting portion (502) is coaxially arranged with the groove (503). After the limiting portion (502) penetrates into the lumen (201) of the pushing rod (2), it is coaxially arranged with the pushing rod (2).

4. The release mechanism of the embolic filling material according to claim 3, characterized in that: The limiting portion (502) comprises an extending section and a limiting section which are integrally fixedly connected, the extending section being arranged between the fixing portion (501) and the limiting section, the radial dimension of the extending section being smaller than the radial dimension of the limiting section, the tubular cavity (201) at the distal end of the pushing rod (2) comprising a reduced diameter section (202) whose diameter matches that of the extending section, and the limiting portion (502) being radially telescopically deformable, so that when the embolic filler (1) is released, the limiting section is disconnected from the first limiting structure (4), and the limiting portion (502) moves along the reduced diameter section (202) in a direction away from the pushing rod (2), so as to be separated from the pushing rod (2).

5. The release mechanism of the embolic filling material according to claim 4, characterized in that: The limiting portion (502) is a hollow cylindrical structure composed of a plurality of sub-clamps arranged at intervals in the circumferential direction, and the distal ends of all the sub-clamps are fixedly connected to the proximal end of the fixing portion (501).

6. The release mechanism of the embolic filling material according to claim 1, characterized in that: The first limiting structure (4) is a block having a radial dimension larger than the push wire (3), and the limiting portion (502) has a slot adapted to at least a portion of the structure of the block, and the slot is used for detachable connection with the block.

7. The release mechanism of the embolic filler according to claim 6, characterized in that: The block is spherical in shape.

8. The release mechanism of the embolic filling material according to claim 6, characterized in that: The depth of the clamping groove is not greater than the radius of the clamping block, and the proximal end of the pushing wire (3) is fixedly connected to the lumen (201) so that the spherical clamping block presses against the clamping groove.

9. The release mechanism of the embolic filling material according to claim 7, characterized in that: An annular groove (203) extending axially is provided on the outer side wall of the proximal end of the push rod (2). The annular groove (203) is provided on the side of the connection portion between the push rod (2) and the push wire (3) away from the proximal end. The push wire (3) can be withdrawn from the proximal end of the lumen (201) by breaking the push rod (2) at the position of the annular groove (203).

10. The release mechanism of the embolic filling material according to any one of claims 1 to 9, characterized in that: A cutting groove (204) extending in a spiral manner around the axial direction is provided on the outer side wall of the pushing rod (2) at a portion close to the distal end.

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