Vascular occlusion device and occluder

Abstract

The application relates to a blood vessel blocking device and a blocker, which comprises a memory belt, the memory belt comprising an initial state of being curled and a deformed state of being flat; a shaping piece comprising a shaping structure, the memory belt passing through and sliding on the shaping piece through the shaping structure, and two sections of the memory belt on opposite sides of the shaping piece being in different states respectively. The memory belt is wound and tightened on a blood vessel through self-curling to block the blood vessel and realize hemostasis, the operation difficulty is low, and the memory belt can extend to blood vessels at different positions, and the applicability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a blood vessel blocking device and a blocking device. BACKGROUND

[0002] At present, in medical operations, hemostasis is an important project, and drugs, pressure or blocking can be used for hemostasis.

[0003] In related technologies, there are two methods for blocking a vein, one of which is to use a blood vessel blocking clamp to block the vein for hemostasis, and the other is to use a blocking belt for hemostasis, specifically, the blocking belt is wound around the blocked vein, the two ends of the blocking belt are passed through a restraint ring, and the two ends of the blocking belt are lifted when blocking, and the Hem-o-lok clamp on the other end of the restraint belt maintains the blocking effect after being tightened.

[0004] Due to the influence of the vein direction and the vein width, the blood vessel blocking clamp cannot be used to block the vein in all cases, so the applicability of the blood vessel blocking clamp is poor. In addition, the use of the blood vessel blocking belt is relatively cumbersome, and it is necessary to first wrap the blocking belt around the vein, which has a certain degree of surgical difficulty, and this process often causes damage and bleeding. SUMMARY

[0005] Embodiments of the present application provide a blood vessel blocking device and a blocking device to solve the technical problems of poor applicability and high surgical difficulty of hemostasis in related technologies.

[0006] In a first aspect, a blood vessel blocking device is provided, comprising:

[0007] A memory belt, the memory belt comprising an initial state in a curled shape and a deformed state in a straight shape;

[0008] A shaping member comprising a shaping structure, the memory belt passing through and sliding on the shaping structure of the shaping member, and two sections of the memory belt on opposite sides of the shaping member being in different states.

[0009] In some embodiments, the cross-sectional shape of the memory belt in the initial state is a first shape, the cross-sectional shape of the memory belt in the deformed state is a second shape, and the shaping structure is configured to switch the cross-sectional shape of the memory belt between the first shape and the second shape.

[0010] In some embodiments, the shaping structure comprises a shaping hole, the cross-sectional shape of the shaping hole on opposite sides of the shaping member 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 thereof.

[0011] In some embodiments, the first shape comprises a rectangle, and the second shape comprises a sector.

[0012] In some embodiments, the blood vessel blocking device further comprises a buffer layer, which is coated on the surface of the memory belt.

[0013] The technical scheme provided by the present application has the beneficial effects of:

[0014] The blood vessel blocking device provided by the embodiments of the present application has the following advantages. The initial state of the memory belt is crimped. When the blood vessel needs to be blocked, the memory belt is pushed out to pass through the shaping structure on the shaping member, so that the memory belt returns to the initial state. The crimped memory belt is automatically wound and tightly wound on the blood vessel to block the blood vessel. Since the memory belt is automatically wound, it is not necessary to use a tool to drive the memory belt to wind, so the operation difficulty is low. The memory belt can be stretched to the blood vessels at different positions, and has strong applicability. The blood vessels at different positions can be easily blocked. In addition, after the bleeding is stopped, the memory belt is pulled through the shaping structure, and the memory belt is shaped to a deformed state. The memory belt is no longer crimped, and the flat memory belt is convenient to take out.

[0015] In a second aspect, a blocking device is provided, comprising the blood vessel blocking device as described above.

[0016] In some embodiments, the blocking device further comprises a force applying member and a connecting structure, at least one end of the memory belt is provided with the connecting structure, and the connecting structure is used to connect with the force applying member.

[0017] In some embodiments, the force applying member comprises:

[0018] A guide sleeve, which is adapted to be connected with the shaping member, and the part of the memory belt in the deformed state is adapted to extend into the guide sleeve;

[0019] A telescopic rod, which is slidably arranged in the guide sleeve, and the telescopic rod is adapted to be connected with the connecting structure;

[0020] A control mechanism, which is in transmission connection with the telescopic rod to drive the telescopic rod to slide relative to the guide sleeve.

[0021] In some embodiments, the force applying member further comprises a clamping assembly, which comprises:

[0022] A clamping strip, the connecting structure comprises a clamping groove, and the clamping strip is adapted to be inserted into the clamping groove;

[0023] A clamping handle, which is rotationally arranged on the telescopic rod;

[0024] A connecting strip, the telescopic rod is provided with a mounting groove along the length direction thereof, the connecting strip is rotationally arranged in the mounting groove, one end of the connecting strip is connected with the clamping strip, and one end of the clamping handle is abutted with the connecting strip.

[0025] an elastic member, two ends of which are connected with the connecting strip and the telescopic rod respectively.

[0026] In some embodiments, the blocking device further comprises a matching structure, which comprises:

[0027] a first magnetic member connected with the shaping member, and a matching slot is formed on the first magnetic member;

[0028] a second magnetic member connected with the force applying member, and a matching block is connected with the second magnetic member, and the first magnetic member and the second magnetic member are in plug-in matching through the matching slot and the matching block.

[0029] Another embodiment of the present application provides a blocking device, which has the same advantages as the blood vessel blocking device described above, and thus repeated description is omitted. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0031] Figure 1 a schematic diagram of the blood vessel blocking device provided by the embodiment of the present application;

[0032] Figure 2 a schematic diagram of the blood vessel blocking device provided by the embodiment of the present application when blocking a blood vessel;

[0033] Figure 3 a schematic diagram of the shaping member provided by the embodiment of the present application;

[0034] Figure 4 a schematic diagram of the shaping member provided by the embodiment of the present application from another perspective;

[0035] Figure 5 a schematic diagram of the force applying member and the blocking device in a state of being ready to be connected provided by another embodiment of the present application;

[0036] Figure 6 a partial schematic diagram of the force applying member and the blocking device in a state of being ready to be connected provided by another embodiment of the present application;

[0037] Figure 7 a schematic diagram of the force applying member and the blocking device in a state of being preliminarily connected provided by another embodiment of the present application;

[0038] Figure 8Fig. 2 is a schematic view of a force applying member and a blocking device provided in another embodiment of the present application, which is connected;

[0039] Figure 9 Fig. 3 is a schematic view of a memory belt blocking a blood vessel provided in another embodiment of the present application;

[0040] Figure 10 Fig. 4 is a partial longitudinal sectional view of a force applying member provided in another embodiment of the present application.

[0041] Fig. 1 is a schematic view of a memory belt, a shaping member, a force applying member, a connecting structure, a matching structure, a first magnetic member, a matching groove, a second magnetic member, and a matching block. DETAILED DESCRIPTION

[0042] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] The embodiments of the present application provide a blood vessel blocking device and a blocking device, the blood vessel blocking device is wound and tightened on a blood vessel by self-winding of a memory belt to block the blood vessel and achieve hemostasis. The present application solves the technical problem of poor applicability and large operation difficulty of a hemostasis method in the prior art.

[0044] Reference Figure 1 and Figure 2 A blood vessel blocking device includes a memory belt 1 and a shaping member 2. The memory belt 1 is made of metal material, in the embodiment, the memory belt 1 is made of titanium alloy, and in some embodiments, the memory belt 1 can also be made of a memory metal. The memory belt 1 is in a long strip shape, and the memory belt 1 has two states, one is an initial state in a curled state, and the other is a deformed state in a straight state. It should be noted that the memory belt 1 in the embodiment utilizes the elastic property of the metal to support the switching between the two states. When it is necessary to block a blood vessel, the memory belt 1 returns to the initial state and is in the curled state, and is automatically wound on the blood vessel to block the blood vessel. Before hemostasis or after hemostasis is completed, the memory belt 1 is in the straight state to facilitate the memory belt 1 to be sent to the blood vessel or removed from the blood vessel.

[0045] Reference Figure 1 andFigure 2 The shaping member 2 comprises a shaping structure 201, and the shaping member 2 switches the memory strip 1 between the initial state and the deformed state through the shaping structure 201. The memory strip 1 passes through and slides on the shaping structure 201 provided on the shaping member 2, and the two sections of the memory strip 1 on the opposite sides of the shaping member 2 are in different states. It can be understood that the memory strip 1 changes the state by passing through the shaping structure 201.

[0046] Referring to Figure 1 and Figure 2 , the cross-sectional shape of the memory strip 1 in the initial state is a first shape, and the cross-sectional shape of the memory strip 1 in the deformed state is a second shape. The shaping structure 201 changes the state of the memory strip 1 by changing the cross-sectional shape of the memory strip 1, and the shaping structure 201 switches the cross-sectional shape of the memory strip 1 between the first shape and the second shape. The shaping structure 201 can change the cross-sectional shape of the memory strip 1 from the first shape to the second shape, or from the second shape to the first shape. In the embodiment, when the memory strip 1 passes through the shaping member 2 in the opposite direction of the first direction, the memory strip 1 gradually changes from the deformed state to the initial state, and when the memory strip 1 passes through the shaping member 2 in the positive direction of the first direction, the memory strip 1 gradually changes from the initial state to the deformed state. The first direction is the length direction of the memory strip 1 when the memory strip 1 is flat, that is, the Y-axis direction in the figure.

[0047] Referring to Figures 1-4 , in the embodiment, the shaping structure 201 comprises a shaping hole. The shaping member 2 is provided in a block shape, the center line direction of the shaping hole is also provided along the first direction, and the shaping hole penetrates through the shaping member 2. The cross-sectional shape of the shaping hole at the opposite side surfaces of the shaping member 2 is respectively the first shape and the second shape, 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. When the memory strip 1 passes through the shaping hole, the memory strip 1 is shaped under the pushing action of the hole wall of the shaping hole, so as to change the cross-sectional shape of the memory strip 1.

[0048] Referring to Figures 1-4 , specifically, 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 strip 1 is a rectangle, the memory strip 1 is in the initial state and is in a curled state, and when the cross-sectional shape of the memory strip 1 is a sector, the memory strip 1 is in the deformed state and is in a flat state. The shaping structure 201 changes the cross-sectional shape of the memory strip 1 from the sector to the rectangle, or from the rectangle to the sector. In the embodiment, the cross-sectional shape of the shaping hole at the two side surfaces of the shaping member 2 is respectively a rectangle and a sector.

[0049] Further, the blood blocking device further comprises a buffer layer, the buffer layer is coated on the surface of the memory belt 1, the buffer layer is made of flexible material, including silica gel or latex. The buffer layer wraps the hard memory belt 1, and the memory belt 1 is not easy to damage the blood vessel when it is wound and tightened on the blood vessel, and it is also not easy to cause additional damage to the affected area during the blocking and hemostasis process.

[0050] With reference to Figure 1 and Figure 2 , further, the memory belt 1 is thickened at the front end in the coiled state, so that the memory belt 1 is more easily tightened on the blood vessel when it is coiled, and in addition, the memory belt 1 is not easy to pass through the shaping member 2 in the first direction after being thickened at the front end in the coiled state.

[0051] By the memory belt 1 automatically coiling to block the blood vessel, the clamping force can reach 150g through testing, and the clamping force of the traditional hemostatic clamp is 100-150g, so that the clamping force applied to the blood vessel by the memory belt 1 can achieve the blocking of the blood vessel and meet the hemostasis requirement.

[0052] The blood blocking device provided by the embodiment of the present application, since the initial state of the memory belt 1 is coiled, when it is needed to block the blood vessel and hemostasis, the memory belt 1 is pushed to pass through the shaping structure 201 on the shaping member 2, so that the memory belt 1 returns to the initial state, and the coiled memory belt 1 can automatically wind and tighten on the blood vessel to achieve the blocking of the blood vessel. Since the memory belt 1 is automatically wound, it is not necessary to use a tool to drive the memory belt 1 to wind, so the operation difficulty is low, the memory belt 1 can extend to the blood vessel at different positions, and the applicability is strong, and it is convenient to block the blood vessel at each position. In addition, after the hemostasis is completed, the memory belt 1 is pulled through the shaping structure 201, the memory belt 1 is shaped to the deformed state, the memory belt 1 is no longer coiled, and the flat memory belt 1 is convenient to be taken out.

[0053] Another embodiment of the present application provides a blocking device, comprising the blood vessel blocking device as described above.

[0054] With reference to Figure 5 and Figure 6 , further, the blocking device further comprises a force applying member 3 and a connecting structure 4, the connecting structure 4 is arranged on the memory belt 1 and is connected with the force applying member 3, the force applying member 3 drives the memory belt 1 to pass through the shaping structure 201, so as to switch the memory belt 1 between the initial state and the deformed state.

[0055] With reference to Figure 1 , Figure 2 and Figure 6Further, 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 applying member 3 drives the memory belt 1 to pass through the shaping structure 201 by pushing or pulling the memory belt 1. Preferably, the connecting structure 4 is arranged at the end of the memory belt 1 in the deformed state, i.e. at the end of the flat section of the memory belt 1. After the force applying member 3 is connected with the connecting structure 4, the memory belt 1 is pulled to pass through the shaping structure 201, at this time, the memory belt 1 gradually changes from the initial crimped state to the deformed flat state; the memory belt 1 is pushed to pass through the shaping structure 201, at this time, the memory belt 1 gradually changes from the deformed flat state to the initial crimped state.

[0056] With reference to Figure 5 and Figure 6 In particular, in this embodiment, the connecting structure 4 comprises a clamping groove, and one end of the memory belt 1 is fixed with two connecting plates, the two connecting plates are arranged in a spaced manner, and the clamping groove is formed between the two connecting plates. The force applying member 3 is connected with the clamping groove in a clamping manner, so as to drive the memory belt 1 to move relative to the shaping member 2 by the force applying member 3.

[0057] With reference to Figure 5 and Figure 6 In particular, the force applying member 3 comprises a guide sleeve 302, a telescopic rod 303 and a control mechanism 304. The front end of the guide sleeve 302 is open, the shaping member 2 is adapted to be connected to the front end of the guide sleeve 302, and a section of the memory belt 1 in a flat state can extend into the guide sleeve 302. The telescopic rod 303 is arranged in 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 by the control mechanism 304, so as to push or pull the memory belt 1.

[0058] With reference to Figures 5-9 When it is needed to block a blood vessel, the shaping member 2 is connected to the front end of the guide sleeve 302 in advance, the flat section of the memory belt 1 is located in the guide sleeve 302, and the memory belt 1 is connected with the telescopic rod 303. The guide sleeve 302 is extended to the blood vessel to be blocked, and the telescopic rod 303 is driven to slide relative to the guide sleeve 302 by the control mechanism 304, so as to drive the memory belt 1 to pass through the shaping member 2, so that the memory belt 1 is automatically wound on the blood vessel, and the operation of blocking the blood vessel is completed.

[0059] With reference to Figures 5-9 When it is needed to take out the shaping member 2 and the memory belt 1 from the body, the guide sleeve 302 is extended to the blocked blood vessel, the guide sleeve 302 is connected with the shaping member 2, the memory belt 1 is connected with the telescopic rod 303, and the telescopic rod 303 is driven to slide relative to the guide sleeve 302 by the control mechanism 304, so as to drive the crimped section of the memory belt 1 to pass through the shaping member 2, to remove the blockage of the blood vessel, and most of the memory belt 1 is collected in the guide sleeve 302, which facilitates taking out the memory belt 1 and the shaping member 2 from the body.

[0060] The guide sleeve 302 passes through a trocar (a laparoscopic puncture cannula) and extends into the body. According to the inner diameter requirement of the trocar, generally, the thickest trocar has an inner diameter of 13 mm, so the diameter of the guide sleeve 302 should be less than 13 mm to ensure that it can slide in the trocar. It should be noted that according to different specifications of the trocar, the size of the guide sleeve 302 and other components of the blocking device are designed correspondingly.

[0061] Referring to Figure 5 and Figure 10 , the force applying member 3 includes a clamping assembly 301, and the telescopic rod 303 is connected to the connecting structure 4 on the memory belt 1 through the clamping assembly 301. Specifically, the clamping assembly 301 includes a clamping strip 3011, a clamping handle 3012, a connecting strip 3013, and an elastic member 3014. The telescopic rod 303 is provided with a mounting groove 303a along the length direction thereof, and the connecting strip 3013 is rotationally connected to the groove wall of the mounting groove 303a. One end of the connecting strip 3013 is fixedly connected to the clamping strip 3011, and the other end of the connecting strip 3013 is hingedly connected to the groove wall of the mounting groove 303a. One end of the clamping handle 3012 abuts against the connecting strip 3013. The elastic member 3014 has two ends fixedly connected to the connecting strip 3013 and the groove wall of the mounting groove 303a, respectively.

[0062] Referring to Figure 5 and Figure 10 , specifically, after the flat section of the memory belt 1 extends into the guide sleeve 302, the clamping strip 3011 can be inserted into the connecting structure 4, so that the telescopic rod 303 is clamped and matched with the memory belt 1. Specifically, the elastic force of the elastic member 3014 pushes the connecting strip 3013, so as to maintain the clamping strip 3011 in the state of being inserted into the connecting structure 4. In this embodiment, the elastic member 3014 includes a spring.

[0063] Referring to Figure 5 and Figure 10 , specifically, the clamping handle 3012 is rotationally arranged on the telescopic rod 303, and the clamping handle 3012 abuts against the connecting strip 3013. By rotating the clamping handle 3012, the clamping handle 3012 can push the connecting strip 3013 to rotate, so as to drive the clamping strip 3011 to rotate, and make the clamping strip 3011 separate from the connecting structure 4.

[0064] Referring to Figure 10 , specifically, the side wall of the guide sleeve 302 is provided with a through groove for the clamping handle 3012 to pass through, and in order to ensure that the clamping handle 3012 slides with 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.

[0065] It can be understood that by pulling the clamping handle 3012, the clamping strip 3011 is moved to the disengaged clamping position, the telescopic rod 303 is moved, and the clamping strip 3011 is moved to the position of the connecting structure 4, and then the clamping handle 3012 is released, and under the action of the elastic member 3014, the clamping strip 3011 is returned to the clamping position to extend into the connecting structure 4, so as to complete the connection between the telescopic rod 303 and the memory belt 1.

[0066] With reference to Figure 5 and Figure 6 Optionally, the structure of the operating mechanism 304 is consistent with the operating handle mechanism of the clip applier in the prior art, which realizes linear motion through a scissors structure, and details are not repeated here. In other embodiments, the operating mechanism 304 can also use a linear module, such as a linear motor.

[0067] In some embodiments, the force applying member 3 includes a clip applier, and the memory belt 1 can be directly clamped by the clip applier to drive the memory belt 1 to move.

[0068] With reference to Figure 5 and Figure 6 The blocker further includes a cooperation structure 5, and the guide sleeve 302 and the plastic member are detachably connected through the cooperation structure 5. The cooperation structure 5 includes a first magnetic member 501 and a second magnetic member 502. The first magnetic member 501 is connected with the plastic member 2, and a cooperation groove 5011 is formed in the first magnetic member 501. The second magnetic member 502 is connected with the force applying member 3, and a cooperation block 5021 is connected with the second magnetic member 502. The first magnetic member 501 and the second magnetic member 502 are inserted and cooperated through the cooperation groove 5011 and the cooperation block 5021. In this embodiment, the first magnetic member 501 and the second magnetic member 502 are both magnets.

[0069] 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 an arc-shaped plate and is shaped to fit the guide sleeve 302. The second magnetic member 502 is fixed on the mounting plate.

[0070] In this way, when the memory belt 1 needs to be driven to move relative to the shaping piece 2, the first magnetic piece 501 and the second magnetic piece 502 are attracted to each other due to the magnetism, so that the shaping piece 2 is connected with the guide sleeve 302. In addition, the first magnetic piece 501 and the second magnetic piece 502 are inserted and matched due to the matching groove 5011 and the matching block 5021, so as to determine the connection position of the shaping piece 2 and the guide sleeve 302, and facilitate the subsequent connection of the telescopic rod 303 with the memory belt 1. In addition, after the guide sleeve 302 is connected with the shaping piece 2, the telescopic rod 303 moves relative to the guide sleeve 302, which can drive the memory belt 1 to move relative to the shaping piece 2, without the need to use other tools to limit the movement of the shaping piece 2, thereby reducing the difficulty of the operation of blocking the blood vessel to stop bleeding. When the connection between the guide sleeve 302 and the shaping piece 2 needs to be released, the guide sleeve 302 is driven to move in a direction deviating from the axial direction, so that an included angle is formed between the first magnetic piece 501 and the second magnetic piece 502, so as to facilitate the separation of the first magnetic piece 501 and the second magnetic piece 502, and release the connection between the guide sleeve 302 and the shaping piece 2.

[0071] The specific hemostasis process is that the guide sleeve 302 is stretched to the blood vessel where hemostasis is needed, the telescopic rod 303 is driven to slide relative to the guide sleeve 302, and the telescopic sleeve is used to push the memory belt 1 out of the guide sleeve 302, the memory belt 1 passes through the shaping piece 2 and is self-wound and tightened on the blood vessel to block the blood vessel. Then the connection between the guide sleeve 302 and the shaping piece 2 is released, and 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 taken away.

[0072] The process of taking out the memory belt 1 and the shaping piece 2 is that the guide sleeve 302 is stretched to the blood vessel position, and the shaping piece 2 is automatically connected with the guide 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, and the telescopic rod 303 is driven to move relative to the guide sleeve 302 to pull the memory belt 1 towards the guide sleeve 302. The coiled part of the memory belt 1 passes through the shaping piece 2 and becomes flat and is mostly received in the guide sleeve 302, the memory belt 1 no longer blocks the blood vessel, and the memory belt 1 and the shaping piece 2 can leave the body together with the guide sleeve 302.

[0073] In the description of the present application, it should be understood that the positive direction of "Y" in the drawings represents the front, and correspondingly, the negative direction of "Y" represents the rear. The term "Y" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the drawings of the specification, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0076] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A blockout, characterized by The application relates to a vascular blocking device, which comprises: a memory belt, which comprises an initial state of being curled and a deformed state of being flat; a shaping member, which comprises a shaping structure, the memory belt passes through and slides on the shaping structure of the shaping member, and two sections of the memory belt on opposite sides of the shaping member are in different states; the memory belt in the initial state has a first cross-sectional shape, the memory belt in the deformed state has a second cross-sectional shape, and the shaping structure is used for switching the cross-sectional shape of the memory belt between the first shape and the second shape; the shaping structure comprises a shaping hole, the shaping hole has the first shape and the second shape in the cross-sectional shape of the opposite side surfaces of the shaping member, 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; the first shape comprises a rectangle, and the second shape comprises a sector; further comprising a force applying member and a connecting structure, 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 applying member; the force applying member comprises: a guide sleeve, which is adapted to be connected with the shaping member, and the part of the memory belt in the deformed state is adapted to extend into the guide sleeve; a telescopic rod, which is slidably arranged in the guide sleeve and is adapted to be connected with the connecting structure; and a control mechanism, which is in transmission connection with the telescopic rod to drive the telescopic rod to slide relative to the guide sleeve; further comprising a buffer layer, which is wrapped on the surface of the memory belt.

2. The blocker of claim 1, wherein, the force applying member further comprises a clamping assembly, which comprises: a clamping strip, the connecting structure comprises a clamping groove, and the clamping strip is adapted to be inserted into the clamping groove; a clamping handle, which is rotationally arranged on the telescopic rod; a connecting strip, which is rotationally arranged in an installation groove in the length direction of the telescopic rod, one end of the connecting strip is connected with the clamping strip, and one end of the clamping handle is abutted with the connecting strip; and an elastic member, which is connected with the connecting strip and the telescopic rod at two ends respectively.

3. The blocker of claim 1, wherein, further comprising a matching structure, which comprises: a first magnetic member, which is connected with the shaping member, and a matching groove is arranged on the first magnetic member; and a second magnetic member, which is connected with the force applying member, and a matching block is connected with the second magnetic member, and the first magnetic member and the second magnetic member are in plug-in matching through the matching groove and the matching block.

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