CN219397434U

CN219397434U - Vascular blocking device and blocking device

Info

Publication number: CN219397434U
Application number: CN202222963026.9U
Authority: CN
Inventors: 田雨; 刘承; 马潞林
Original assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Current assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-07-25
Anticipated expiration: 2032-11-07

Abstract

The utility model relates to a vascular occlusion device and an occlusion device, the vascular occlusion device comprises a memory belt, wherein the memory belt comprises an initial state of curling and a straight deformation state; the shaping piece comprises a shaping structure, the memory belt penetrates through the shaping structure and is arranged on the shaping piece in a sliding mode, and two sections of the memory belt, which are positioned on two opposite sides of the shaping piece, are respectively in different states. The utility model winds and winds the memory belt on the blood vessel by self-winding to block the blood vessel, thereby realizing hemostasis with low operation difficulty, and the memory belt can extend to blood vessels at different positions, thus having strong applicability.

Description

Vascular blocking device and blocking device

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a vascular occlusion device and an occlusion device.

Background

Currently, in medical operation, hemostasis is an important item, and medicine hemostasis, compression hemostasis or blocking hemostasis can be adopted generally.

In the related art, vein blocking means include two kinds, one is to block veins by using a vascular blocking forceps to stop bleeding; the other is to use the blocking belt to stop bleeding, specifically, after the blocking belt is wound on the vein to be blocked, the two ends of the blocking belt pass through the constraint ring, when the blocking belt is blocked, the two ends of the blocking belt are lifted, and after the blocking belt is tightened, a Hem-o-lok clamp is arranged at the other end of the constraint belt to maintain the blocking effect.

Because the vascular occlusion forceps are affected by the trend of veins, the width of veins and the like, the vascular occlusion forceps can not be used for occluding veins under all conditions, so the vascular occlusion forceps have poor applicability; in addition, the vascular occlusion belt is complicated to use, the occlusion belt is wound around a vein, a certain operation difficulty exists, and the process often causes injury bleeding.

Disclosure of Invention

The embodiment of the utility model provides a vascular blocking device and a blocking device, which are used for solving the technical problems of poor applicability and high operation difficulty of a hemostasis mode in the related art.

In a first aspect, there is provided a vascular occlusion device comprising:

a memory ribbon comprising an initial state in which it is curled and a deformed state in which it is straight;

the shaping piece comprises a shaping structure, the memory belt penetrates through the shaping structure and is arranged on the shaping piece in a sliding mode, and two sections of the memory belt, which are positioned on two opposite sides of the shaping piece, are respectively in different states.

In some embodiments, the memory ribbon has a first shape in cross-section in an initial state and a second shape in cross-section in a deformed state, and the shaping structure is configured to switch the cross-section of the memory ribbon between the first shape and the second shape.

In some embodiments, the shaping structure includes a shaping hole, the cross-sectional shape of the shaping hole on two opposite sides of the shaping piece is the first shape and the second shape, respectively, and the cross-sectional shape of the shaping hole gradually changes from the first shape to the second shape along the center line of the shaping hole.

In some embodiments, the first shape comprises a rectangle and the second shape comprises a sector.

In some embodiments, the vascular occlusion device further comprises a buffer layer, wherein the buffer layer is coated on the surface of the memory band.

The technical scheme provided by the utility model has the beneficial effects that:

the embodiment of the utility model provides a blood vessel blocking device, wherein the initial state of a memory belt is in a curled shape, when a blood vessel needs to be blocked for hemostasis, the memory belt is pushed out to penetrate through a molding structure on a molding piece, so that the memory belt returns to the initial state, the curled memory belt can be automatically wound and wound on the blood vessel, the blood vessel is blocked, and the memory belt is automatically wound without using a tool to drive the memory belt to wind, so that the operation difficulty is low, the memory belt can extend to the blood vessels at different positions, the applicability is strong, and the blood vessel at each position is conveniently blocked. In addition, after hemostasis is finished, the memory belt is shaped to a deformation state by pulling the memory belt through the shaping structure, the memory belt is not curled any more, and the memory belt in a flat shape is convenient to take out.

In a second aspect, there is provided a occluder comprising a vascular occlusion device as described above.

In some embodiments, the blocking device further comprises a force application member and a connecting structure, wherein at least one end of the memory belt is provided with the connecting structure, and the connecting structure is used for being connected with the force application member.

In some embodiments, the force application member comprises:

the guide sleeve is suitable for being connected with the shaping piece, and the part of the memory belt in a deformation state is suitable for extending into the guide sleeve;

the telescopic rod is arranged in the guide sleeve in a sliding penetrating manner and is suitable for being connected with the connecting structure;

the control mechanism is in transmission connection with the telescopic rod so as to drive the telescopic rod to slide relative to the guide sleeve.

In some embodiments, the force application member further comprises a snap-in assembly comprising:

the connecting structure comprises a clamping groove, and the clamping strip is suitable for being inserted into the clamping groove;

the clamping handle is rotationally arranged on the telescopic rod;

the telescopic rod is provided with a mounting groove along the length direction of the telescopic rod, the connecting rod is rotatably arranged in the mounting groove, one end of the connecting rod is connected with the clamping strip, and one end of the clamping handle is abutted with the connecting rod;

and two ends of the elastic piece are respectively connected with the connecting strip and the telescopic rod.

In some embodiments, the blocker further comprises a mating structure comprising:

the first magnetic piece is connected with the shaping piece, and a matching groove is formed in the first magnetic piece;

the second magnetic piece is connected with the force application piece, a matching block is connected to the second magnetic piece, and the first magnetic piece and the second magnetic piece are in plug-in matching with the matching block through the matching groove.

Another embodiment of the present utility model provides a blocking device, which has the same advantageous effects as the above vascular blocking device, and thus is not described herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a vascular occlusion device according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a vascular occlusion device according to an embodiment of the present utility model for occluding a blood vessel;

FIG. 3 is a schematic view of a molding member according to an embodiment of the present utility model;

FIG. 4 is a schematic view of another view of the molded article according to the embodiment of the present utility model;

FIG. 5 is a schematic view of a force application member and blocking device according to another embodiment of the present utility model;

FIG. 6 is a schematic view of a portion of a force application member and blocking device according to another embodiment of the present utility model in a ready-to-connect state;

FIG. 7 is a schematic view of a preliminary connection state of a force application member and a blocking device according to another embodiment of the present utility model;

FIG. 8 is a schematic view of a force application member and blocking device according to another embodiment of the present utility model;

FIG. 9 is a diagram showing a memory band-blocked vascular state according to another embodiment of the present utility model;

FIG. 10 is a partial longitudinal cross-sectional view of a force application member according to another embodiment of the present utility model.

In the figure: 1. a memory band; 2. shaping piece; 201. shaping the structure; 3. a force application member; 301. a clamping assembly; 3011. a clamping strip; 3012. a clamping handle; 3013. a connecting strip; 3014. an elastic member; 302. a guide sleeve; 303. a telescopic rod; 303a, mounting slots; 304. an operating mechanism; 4. a connection structure; 5. a mating structure; 501. a first magnetic member; 5011. a mating groove; 502. a second magnetic member; 5021. and a matching block.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment of the utility model provides a blood vessel blocking device and a blocking device, wherein the blood vessel blocking device is wound and tightly wound on a blood vessel through self-winding of a memory belt so as to block the blood vessel and realize hemostasis.

Referring to fig. 1 and 2, a vascular occlusion device comprises a memory band 1 and a shaping member 2. The memory strip 1 is made of metal, in this embodiment, the memory strip 1 is made of titanium alloy, and in some embodiments, the memory strip 1 may be made of memory metal. The memory belt 1 is in a long strip shape, and the memory belt 1 has two states, namely an initial state of curling and a straight deformation state. It should be noted that the memory tape 1 in this embodiment supports switching between two states by utilizing the elastic properties of metal. When the blood vessel needs to be blocked, the memory belt 1 returns to the initial state to be in a curled state, and is automatically curled and wound on the blood vessel to block the blood vessel. Before or after hemostasis is completed, the memory band 1 is in a flat state to facilitate the delivery or removal of the memory band 1 to or from the blood vessel.

Referring to fig. 1 and 2, the molding member 2 includes a molding structure 201, and the molding member 2 is switched between an initial state and a deformed state by the molding structure 201 memory belt 1. The memory belt 1 passes through the molding structure 201 and is slidably arranged on the molding member 2, two sections of the memory belt 1 at two opposite sides of the molding member 2 are respectively in different states, and it is understood that the state can be changed by passing the memory belt 1 through the molding structure 201.

Referring to fig. 1 and 2, wherein the cross-sectional shape of the memory ribbon 1 in the initial state is a first shape and the cross-sectional shape of the memory ribbon 1 in the deformed state is a second shape. The shaping structure 201 changes the state of the memory tape 1 by changing the cross-sectional shape of the memory tape 1, and the shaping structure 3 switches the cross-sectional shape of the memory tape 1 between the first shape and the second shape. The shaping structure 201 may change the cross-sectional shape of the memory ribbon 1 from a first shape to a second shape, and may also change the second shape to the first shape. In this embodiment, when the memory belt 1 passes through the molding member 2 in the opposite direction to the first direction, the memory belt 1 gradually changes from the deformed state to the initial state, and when the memory belt 1 passes through the molding member 2 in the forward direction to the first direction, the memory belt 1 gradually changes from the initial state to the deformed state. The first direction is the length direction of the memory tape 1 when it is straight, i.e. the Y-axis direction in the figure.

Referring to fig. 1-4, in this embodiment, the shaping structure 201 includes shaping apertures. The molding member 2 is arranged in a block shape, the central line direction of the molding hole is also arranged along the first direction, and the molding hole penetrates through the molding member 2. The cross-sectional shapes of the shaping holes at the opposite sides of the shaping member 2 are a first shape and a second shape, respectively, and the cross-sectional shape of the shaping holes gradually changes from the first shape to the second shape along the center line thereof. When the memory belt 1 passes through the shaping hole, the memory belt 1 is shaped under the pushing action of the wall of the shaping hole, so that the cross section shape of the memory belt 1 is changed.

Referring to fig. 1-4, in particular, the first shape comprises a rectangle and the second shape comprises a sector. It can be understood that when the cross-sectional shape of the memory belt 1 is rectangular, the memory belt 1 is in an initial state and is curled; when the cross section of the memory belt 1 is fan-shaped, the memory belt 1 is in a deformed state and is straight. The shaping structure 201 functions to change the cross-sectional shape of the memory ribbon 1 from a fan shape to a rectangular shape or from a rectangular shape to a fan shape. In this embodiment, the cross-sectional shapes of the shaping holes on both sides of the shaping member 2 are rectangular and fan-shaped, respectively.

Further, the blood blocking device further comprises a buffer layer, the buffer layer is coated on the surface of the memory belt 1, and the buffer layer is made of flexible materials and comprises silica gel or latex. The buffer layer wraps the hard memory belt 1, when the memory belt 1 is wound and wound on a blood vessel, the blood vessel is not easy to be damaged, and in the process of stopping bleeding, the wound is not easy to be additionally damaged.

Referring to fig. 1 and 2, further, the memory ribbon 1 is provided with a thickened end in a curled shape, so that the blood vessel is more easily cinched when the memory ribbon 1 is curled, and the memory ribbon 1 is also less likely to pass through the molding member 2 from the positive direction of the first direction after the thickened end of the memory ribbon 1 in a curled shape is provided.

The memory belt 1 is automatically curled to block the blood vessel, and the clamping force of the memory belt 1 can reach 150g, and the clamping force of the traditional hemostatic clamp is 100-150g through testing, so that the clamping force of the memory belt 1 applied to the blood vessel can block the blood vessel, and the hemostatic requirement can be met.

According to the blood blocking device provided by the embodiment of the utility model, the initial state of the memory belt 1 is in a curled shape, when the blood vessel needs to be blocked for hemostasis, the memory belt 1 is pushed to pass through the molding structure 201 on the molding piece 2, so that the memory belt 1 returns to the initial state, the curled memory belt 1 can be automatically wound and tightly wound on the blood vessel, the blood vessel is blocked, and the memory belt 1 is automatically wound without using a tool to drive the memory belt 1 to wind, so that the operation difficulty is low, the memory belt 1 can extend to the blood vessels at different positions, the applicability is strong, and the blood vessel at each position is conveniently blocked. In addition, after hemostasis is finished, the memory belt 1 is shaped to a deformed state by pulling the memory belt 1 through the shaping structure 201, the memory belt 1 is not curled any more, and the memory belt 1 in a flat shape is convenient to take out.

Another embodiment of the utility model provides an occluder comprising a vascular occlusion device as described above.

Referring to fig. 5 and 6, the blocking device further includes a force application member 3 and a connection structure 4, wherein the connection structure 4 is disposed on the memory belt 1 and is used for connecting the force application member 3, and the force application member 3 drives the memory belt 1 to pass through the shaping structure 201, so as to switch the memory belt 1 between an initial state and a deformed state.

Referring to fig. 1, 2 and 6, further, at least one end of the memory belt 1 is provided with a connecting structure 4, in this embodiment, one end of the memory belt 1 is provided with the connecting structure 4, and the force application member 3 pushes and pulls the memory belt 1 to drive the memory belt 1 to pass through the shaping structure 201. Preferably, the connecting structure 4 is provided at the end of the memory band 1 in the deformed state, i.e. at the end of the straight section of the memory band 1. After the force application piece 3 is connected with the connecting structure 4, the memory belt 1 is pulled to pass through the shaping structure 201, and at the moment, the memory belt 1 gradually changes from a curled initial state to a straight deformation state; the memory ribbon 1 is pushed through the shaping structure 201, at which time the memory ribbon 1 gradually changes from a flat deformed state to a curled initial state.

Referring to fig. 5 and 6, specifically, in this embodiment, the connection structure 4 includes a clamping groove, two connection plates are fixed at one end of the memory belt 1, the two connection plates are disposed at intervals, and the clamping groove is formed between the two connection plates. The force application member 3 is engaged with the clamping groove so as to drive the memory belt 1 to move relative to the shaping member 2 through the force application member 3.

Referring to fig. 5 and 6, specifically, the urging member 3 includes a guide bush 302, a telescopic rod 303, and an operating mechanism 304. The front end opening of the guide sleeve 302 is arranged, the shaping member 2 is suitable for being connected to the front end of the guide sleeve 302, and a section of the memory belt 1 in a straight shape can extend into the guide sleeve 302. The telescopic rod 303 penetrates through the guide sleeve 302, the telescopic rod 303 can be connected with the memory belt 1, and the telescopic rod 303 is driven to slide in the guide sleeve 302 through the operating mechanism 304 so as to push and pull the memory belt 1.

Referring to fig. 5 to 9, when it is necessary to block a blood vessel, the molding member 2 is previously attached to the front end of the guide sheath 302, and the straight portion of the memory band 1 is located in the guide sheath 302, and the memory band 1 is attached to the telescopic rod 303. The guide sleeve 302 is extended to the position of the blood vessel to be blocked, the telescopic rod 303 is driven by the operating mechanism 304 to slide relative to the guide sleeve 302, so that the memory belt 1 is driven to pass through the shaping piece 2, the memory belt 1 is automatically wound on the blood vessel, and the operation of blocking the blood vessel is completed.

Referring to fig. 5-9, when the molded part 2 and the memory belt 1 need to be taken out from the body, the guide sleeve 302 is extended to the blocked blood vessel, the guide sleeve 302 is connected with the molded part 2, the memory belt 1 is connected with the telescopic rod 303, the telescopic rod 303 is driven to slide relative to the guide sleeve 302 by the operating mechanism 304 so as to drive a curled section of the memory belt 1 to pass through the molded part 2, blocking of the blood vessel is relieved, and most of the memory belt 1 is retracted into the guide sleeve 302, so that the memory belt 1 and the molded part 2 are conveniently taken out from the body together.

Wherein the guide sheath 302 extends into the body through a Trocar (laparoscopic cannula). According to the Tromar inner diameter requirement, the coarsest Tromar inner diameter is typically 13mm, so the diameter of the guide sleeve 302 should be less than 13mm to ensure sliding within the Tromar. It should be noted that the guide sleeve 302 and other components of the occlusion device are sized to correspond to different sizes of Trocar.

Referring to fig. 5 and 10, the force application member 3 includes a clamping assembly 301, and the telescopic rod 303 is connected to the connection structure 4 on the memory tape 1 through the clamping assembly 301. Specifically, the clip assembly 301 includes a clip strip 3011, a clip handle 3012, a connection strip 3013, and an elastic member 3014. The telescopic rod 303 is provided with a mounting groove 303a along the length direction, and the connecting strip 3013 is rotatably connected to the groove wall of the mounting groove 303 a. One end of the connecting strip 3013 is fixedly connected with the clamping strip 3011, and the other end of the connecting strip 3013 is hinged to the groove wall of the mounting groove 303 a. One end of the clamping handle 3012 abuts against the connecting strip 3013. The elastic member 3014 is fixed to the connecting rod 3013 and the groove wall of the mounting groove 303a, respectively.

Referring to fig. 5 and 10, specifically, after the straight section of the memory belt 1 extends into the guide sleeve 302, the locking strip 3011 may be inserted into the connection structure 4, so that the telescopic rod 303 is locked and engaged with the memory belt 1. Specifically, the elastic force of the elastic member 3014 pushes the connection bar 3013, and maintains the snap-in bar 3011 in a state of being inserted into the connection structure 4. In this embodiment, the elastic member 3014 includes a spring.

Referring to fig. 5 and 10, specifically, the clamping handle 3012 is rotatably disposed on the telescopic rod 303, the clamping handle 3012 abuts against the connecting strip 3013, and by rotating the clamping handle 3012, the connecting strip 3013 can be pushed to rotate by the clamping handle 3012 so as to drive the clamping strip 3011 to rotate, so that the clamping strip 3011 is separated from the connecting structure 4.

Referring to fig. 10, specifically, a through groove for the clamping handle 3012 to pass through is formed in the side wall of the guide sleeve 302, and in order to ensure that the clamping handle 3012 slides along the telescopic rod 303 relative to the guide sleeve 302, the length direction of the through groove is consistent with the length direction of the guide sleeve 302.

It can be understood that by pulling the clamping handle 3012, the clamping strip 3011 is driven to move to a position separated from the clamping position, and the telescopic rod 303 can be driven to move, and the clamping strip 3011 is synchronously driven to move to the position of the connecting structure 4, and then the clamping handle 3012 is loosened, so that the clamping strip 3011 returns to the clamping position under the action of the elastic piece 3014 to extend into the connecting structure 4, so that the telescopic rod 303 is connected with the memory belt 1.

Referring to fig. 5 and 6, the structure of the operating mechanism 304 is optionally identical to the operating handle mechanism of the clip applier in the prior art, and it implements linear motion through a scissors structure, which is not described in detail herein. In other embodiments, the steering mechanism 304 may also employ a linear module, such as a linear motor.

In some embodiments, the force application member 3 includes a clamp, and the clamp can directly clamp the memory belt 1, so as to drive the memory belt 1 to move.

Referring to fig. 5 and 6, the blocker further comprises a mating structure 5, and the guide sleeve 302 and the shaping member are detachably connected by the mating structure 5. The mating structure 5 includes a first magnetic member 501 and a second magnetic member 502. The first magnetic member 501 is connected with the molding member 2, and the first magnetic member 501 is provided with a matching groove 5011. The second magnetic member 502 is connected with the force application member 3, and the second magnetic member 502 is connected with a fitting block 5021. The first magnetic member 501 and the second magnetic member 502 form a plug-in fit through the fitting groove 5011 and the fitting block 5021. In this embodiment, the first magnetic member 501 and the second magnetic member 502 are both magnets.

In this embodiment, the second magnetic member 502 is fixed at the front end opening of the guide sleeve 302, and the front end surface of the guide sleeve 302 is fixed with a mounting plate, which is arc-shaped and has a shape matching the guide sleeve 302. The second magnetic member 502 is fixed to the mounting plate.

So configured, when the memory belt 1 needs to be driven to move relative to the shaping member 2, the first magnetic member 501 and the second magnetic member 502 attract each other due to magnetism, so that the shaping member 2 is connected with the guide sleeve 302. In addition, the first magnetic member 501 and the second magnetic member 502 form an insertion fit due to the fitting groove 5011 and the fitting block 5021, so as to determine the connection position of the shaping member 2 and the guide sleeve 302, thereby facilitating the subsequent connection of the telescopic rod 303 with the memory band 1. In addition, after the guide sleeve 302 is connected with the molding piece 2, when the telescopic rod 303 moves relative to the guide sleeve 302, the memory belt 1 can be driven to move relative to the molding piece 2, and other tools are not required to limit the movement of the molding piece 2, so that the operation difficulty of blocking blood vessels to stop bleeding is reduced. When the connection between the guide sleeve 302 and the molding member 2 needs to be released, the guide sleeve 302 is driven to move in a direction deviating from the axial direction of the guide sleeve, so that an included angle is formed between the first magnetic member 501 and the second magnetic member 502, the first magnetic member 501 and the second magnetic member 502 are conveniently separated, and the connection between the guide sleeve 302 and the molding member 2 is released.

The specific hemostatic procedure is that the guide sleeve 302 is extended to the blood vessel to be hemostatic, the telescopic rod 303 is driven to slide relative to the guide sleeve 302, the memory belt 1 is pushed out of the guide sleeve 302 by the telescopic sleeve, and the memory belt 1 passes through the molding piece 2 to be wound and tightly bound on the blood vessel by itself, so that the blocking of the blood vessel is realized. And then the connection between the guide sleeve 302 and the shaping piece 2 is released, and simultaneously the connection between the telescopic rod 303 and the memory belt 1 is released, so that the shaping piece 2 and the memory belt 1 are left in the body, and the guide sleeve 302 is removed.

The procedure of taking out the memory belt 1 and the shaping part 2 is that the guiding sleeve 302 is extended to the blood vessel position, and the shaping part 2 is automatically connected with the guiding sleeve 302 under the action of the matching structure 5. The telescopic rod 303 is connected with the connecting structure 4 on the memory belt 1 through the clamping assembly 301, the telescopic rod 303 is driven to move relative to the guide sleeve 302, so that the memory belt 1 is pulled towards the guide sleeve 302, the curled portion of the memory belt 1 penetrates through the shaping piece 2 to become straight and is mostly contained in the guide sleeve 302, the memory belt 1 does not block blood vessels, and the memory belt 1 and the shaping piece 2 can leave the body together with the guide sleeve 302.

In the description of the present utility model, it is to be understood that the forward direction of "Y" in the drawings represents the front, and correspondingly, the reverse direction of "Y" represents the rear; the orientation or positional relationship indicated by the term "Y" is based on the orientation or positional relationship shown in the drawings of the specification for convenience of description and simplicity of description only, and is not intended to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present utility model, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vascular occlusion device, comprising:

2. The vascular occlusion device of claim 1, wherein the memory band has a first shape in cross-section in an initial state and a second shape in cross-section in a deformed state, the shaping structure being configured to switch the cross-section of the memory band between the first shape and the second shape.

3. The vascular occlusion device of claim 2, wherein the shaping structure includes a shaping aperture having a cross-sectional shape that is the first shape and the second shape, respectively, on opposite sides of the shaping member, and wherein the cross-sectional shape of the shaping aperture tapers from the first shape to the second shape along a centerline thereof.

4. A vascular occlusion device as in claim 2 or 3, wherein the first shape comprises a rectangle and the second shape comprises a fan.

5. The vascular occlusion device of claim 1, further comprising a buffer layer, wherein the buffer layer is wrapped around a surface of the memory band.

6. A occluder comprising a vascular occlusion device according to any of claims 1 to 5.

7. The occluder of claim 6, further comprising a force applying member and a connecting structure, wherein at least one end of the memory band is provided with the connecting structure and the connecting structure is adapted to connect with the force applying member.

8. The occluder of claim 7, wherein the force applying member comprises:

9. The blocker as claimed in claim 8, wherein the force application member further comprises a snap-in assembly comprising:

the clamping handle is rotationally arranged on the telescopic rod;

10. The blocker as claimed in claim 7, further comprising a mating structure comprising: