CN217548131U - Vascular plug - Google Patents

Abstract

The utility model discloses a vascular plug, which comprises a cage-shaped structure, wherein a cilium structure is filled in the cage-shaped structure; the near end of the cage-shaped structure is fixed with one end of the cilium structure through a bolt head, and the far end of the cage-shaped structure is fixed with the other end of the cilium structure through a steel sleeve. The utility model discloses a structure is woven to vascular plug's cage type structure uses two spindle types to make this vascular plug can carry through the minor diameter pipe, and the addition of cilium structure makes the device can promote the effect of early blood flow separation and embolus.

Description

Vascular plug

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a vascular plug.

Background

Transcatheter arterial embolization (transcatheter arterial embolization) is one of the most important basic techniques for interventional radiology. The technology is used for injecting or delivering embolic substances into a target blood vessel through a catheter under X-ray fluoroscopy so as to occlude the blood vessel and achieve the expected treatment purpose. The technology has the advantages of micro-invasiveness, whole-process image guidance and target blood vessel selectivity, so that the accuracy and controllability of embolism are greatly enhanced, and the technology becomes a revolutionary clinical treatment method.

Embolic material is injected through a catheter into a blood vessel, which is then embolized, thereby affecting the target vessel, target organ, and local flow dynamics to varying degrees.

Metal spring rings in the prior art. Usually, the embolism substance can pass through the small inner diameter of the catheter, and is expanded or coiled after the catheter exits, and is mostly used for embolizing blood vessels or blood vessel tumor cavities (3-15 mm) with larger diameter than the catheter. For example, patent publication No. CN110179516A discloses a medical coil and a manufacturing method and a using method thereof, which disclose that the volume of the coil is small, a plurality of coils are needed to implant in a blood vessel with a large embolism diameter, and the operation time is long. It is expensive. Meanwhile, in a blood vessel with a high blood flow rate, the blood vessel is easy to displace. Also for example, a Medical devices for treating a target site and an associated method disclosed in a blood vessel plug with a publication number of AU2013273779A1 discloses a blood vessel plug woven by a memory alloy wire multi-metal mesh design with super-elasticity and self-expansion, which increases the wire density and interference to blood flow through a multi-layer metal mesh design; meanwhile, the blood vessel has more sizes and can adapt to different blood vessels. But the grid gaps between the wires are larger. The hemostatic property is insufficient.

For this reason, it is necessary to design it newly to overcome the above-mentioned disadvantages.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the defects of the prior art and provides a vascular plug.

In order to realize the above purpose, the utility model adopts the following technical scheme:

a vascular plug comprises a cage-shaped structure, wherein the interior of the cage-shaped structure is filled with cilium structures; the near end of the cage-shaped structure is fixed with one end of the cilium structure through a bolt head, and the far end of the cage-shaped structure is fixed with the other end of the cilium structure through a steel sleeve.

Further, the shape of the cage-shaped structure is conical or shuttle-shaped.

Further, the vascular plug includes one or more cage structures.

Further, the cage-shaped structure is a single-layer or multi-layer net-shaped structure.

Furthermore, the net-shaped structure is formed by weaving first metal wires, and the first metal wires are made of one or more of nickel-titanium alloy and platinum-iridium alloy; the diameter of the nickel-titanium alloy or the platinum-iridium alloy is between 0.05mm and 0.15 mm.

Further, the fixing means of the two ends of the ciliated structure comprises one or more of extrusion fixing, adhesive fixing, clamp fixing and binding tape winding fixing.

Further, the cilia structure adopts a second metal wire structure; the second metal wire structure comprises spring wires, inner ropes and fiber wool; the inner rope is arranged in the spring wire, and two ends of the inner rope are fixedly arranged at two ends of the spring wire; the fiber hair is wound on the inner rope, and two ends of the fiber hair extend out of the outer side of the spring wire through the gap of the spring wire; the fiber hair is made of Nylon Nylon or poly (lactide-co-glycolide) PGLA; the diameter of the fiber wool is 0.05 mm-0.1 mm.

Further, the cilia structure is composed of a plurality of fine fibers with a high molecular structure, and the diameter of each fine fiber is 0.05mm to 0.1mm.

Furthermore, the cage structures are fixedly connected through connecting pieces.

Further, the connecting piece is made of one or more of nickel-titanium alloy, platinum-iridium alloy and high polymer materials; the bolt head and the steel sleeve are both composed of one or more of nickel-titanium alloy, platinum-iridium alloy and high polymer materials.

Furthermore, an internal thread structure is arranged at one end of the bolt head and connected with a conveying system.

Further, the cage-shaped structure is provided with a coating film, and the coating film is made of one or more of PET, polyurethane, PTFE and e-PTFE; the thickness of the film is 0.01mm-1mm.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) The cage-shaped structure of the vascular plug adopts a net-shaped braided structure so that the vascular plug can be conveyed through a small-diameter catheter, and the device can promote early blood flow obstruction and thrombus-causing effect due to the addition of the cilium structure;

(2) The braided structure uses wires having a diameter of between 0.05 and 0.15mm, such that the vascular plug, when compressed, has a diameter of 1.0-1.2mm and can be loaded into a 5F catheter;

(3) The cage-shaped structure and the cilium structure are combined with each other, so that the vascular plug has a better effect, the cage-shaped structure has a certain vascular blocking effect, and the cilium structure inside the cage-shaped structure is added, so that a more durable and stable structural grid structure is formed in the cage-shaped structure, thrombus formation is facilitated, the embolization efficiency is improved, and the purpose of vascular embolization is achieved;

(4) The blood vessel plug can achieve the purpose of embolism without using a plurality of devices through the design that the cage-shaped structure wraps the cilium structure, and the blood vessel plug can be tightly attached to the inside of a blood vessel due to the self expansive force of the cage-shaped structure, so that the stability of embolism is improved;

(5) This vascular plug carries out the adjustment of size according to the blood vessel internal diameter scope of difference, and to the blood vessel of great diameter, its inside blood flow is great relatively, and the impact force of receiving relatively behind the embolism is great, so carry out the one end side tectorial membrane of cage type structure for the thrombus through cilium structure formation is difficult to receive the impact in the cage type structure, so can not broken up by the impact force of blood flow, thereby the more stable vascular embolism that carries on.

Drawings

FIG. 1 is a diagram of a vascular plug according to one embodiment;

FIG. 2 is a schematic view of a vascular plug according to one embodiment;

FIG. 3 is a schematic view of a mesh structure provided in accordance with one embodiment before being shaped;

figure 4 is a schematic representation of the cilia structure provided by example one;

FIG. 5 is a schematic view of a second wire structure provided in accordance with one embodiment;

FIG. 6 is an external profile view of a cage structure according to the first embodiment;

FIG. 7 is a structural view of a vascular plug according to a second embodiment;

FIG. 8 is a schematic view of a vascular plug according to the third embodiment;

FIG. 9 is a schematic view of a vascular plug provided in accordance with a third embodiment;

FIG. 10 is a schematic view of a vascular plug provided in accordance with a third embodiment;

FIG. 11 is a schematic view of an integrally knitted cage structure according to a third embodiment;

figure 12 is a schematic view of an integrally knitted ciliated structure provided by the third embodiment;

FIG. 13 is a schematic view of delivery of a vascular plug to a target site in a blood vessel according to the third embodiment;

FIG. 14 is a schematic view of a vascular plug according to the fifth embodiment;

wherein, 1, the structure is cage type; 101. shrinking the surface end; 102. a large-face end; 2. a ciliated structure; 201. a spring wire; 202. an inner rope; 203. fiber wool; 3. a bolt head; 301. a thread structure; 4. steel bushing; 5. a coupler.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

The utility model aims at the defects of the prior art and provides a vascular plug.

Example one

The present embodiment provides a vascular plug, as shown in fig. 1-2, a cage structure 1, the inside of the cage structure 1 is filled with a cilium structure 2, the proximal end of the cage structure 1 is fixed with one end of the cilium structure 2 through a plug 3, and the distal end of the cage structure 1 is fixed with the other end of the cilium structure 2 through a steel sleeve 4. The ciliated structures 2 of this embodiment may promote early blood flow blockage and thrombogenic effects, thereby preventing blood flow and blocking blood vessels.

It should be noted that "proximal" is defined in this embodiment to mean that the cage structure is located on the side of the delivery system or on the side manipulated by the user when manipulating the vascular plug; by "distal end" is meant the side of the cage structure that is distal to the delivery system or the side that is manipulated by the user when the device is operated.

The vascular plug of the present embodiment has compressibility and self-expansion, or the cage structure has compressibility and self-expansion; the compressibility refers to the ability to compress the vascular plug to make it in a compressed state, and its main purpose is to make the vascular plug better able to be transported by a transport system and able to be transported and implanted into a thinner vascular position, the self-expandability refers to the ability of the vascular plug to enter the blood vessel and expand by itself after being released by the transport system, so as to be able to be tightly attached to the vascular wall, thereby achieving the effects of stopping blood flow and blocking the blood vessel; the cilia structure is flexible and is arbitrarily bent, and the length of the cilia structure is a strip which can be arbitrarily selected, so that the cilia structure can be changed according to the change of the shape of the cage-type structure by changing the length and the bent shape, and the cilia structure can be fittingly arranged in the cage-type structure in each embodiment.

As shown in fig. 2, the cage structure 1 comprises a face-contracting end 101 and a large-face end 102, the proximal position of the face-contracting end 101 is fixed with one end of the cilia structure 2 through the plug head 3, and the distal position of the large-face end 102 after contraction is fixed with the other end of the cilia structure 2 through the steel sleeve 4.

The face-shrinking end 101 of the cage-shaped structure 1 is formed by slowly keeping the cage-shaped structure 1 away from the central axis in the process that the cage-shaped structure 1 is far away from the bolt head 3 (the near end of the face-shrinking end 101 of the cage-shaped structure 1) and is close to the far end; the large-surface end 102 of the cage structure 1 is formed by starting from the far end (the end far away from the near end of the reduced-surface end 101) of the reduced-surface end 101 of the cage structure 1 and enabling the cage structure 1 to be quickly close to the central axis in the process of approaching to the far end of the cage structure 1; the central axis is the central axis formed by the bolt head and the steel sleeve, and the difference between the slow separation and the fast approach is as follows: varying the unit length along the central axis has a "absolute value of the distance slowly away from the central axis" that is less than an "absolute value of the distance quickly toward the central axis".

Meanwhile, in order to more conveniently install the steel sleeve 4, the large-surface end 102 of the cage-shaped structure 1 finally forms a net-shaped structure which can be installed inside the steel sleeve 4 at a far-end position, but this does not indicate that the installation mode of the steel sleeve 4 must be sleeved on the net-shaped structure, and the steel sleeve 4 can be directly and fixedly installed in the middle of the large-surface end 102 of the large-surface-end cage-shaped structure 1 in a welding, bonding and other modes.

The cage structure 1 of the present embodiment is conical, and the cage structure 1 is a single-layer or multi-layer (e.g. double-layer, three-layer, four-layer, etc.) net structure.

The conical structure has various types, but according to the using method of a product, the shape of the cage-shaped structure is designed to be more optimal, a structure with better mechanical property is obtained, the contracted surface end and the large surface end are further limited in more detail, the specific structure of the cage-shaped structure is not only the conical contracted surface end and the contracted large surface end, but the contracted surface end and the large surface end are both composed of straight line sections and a plurality of circular arc sections, but the requirement shows that: this is an embodiment of the vascular plug with better mechanical properties, which does not affect the remaining structural limitations of the vascular plug, and has the advantages of better folding, achieving the purpose of being placed into a 5F catheter, and the vascular plug being able to smoothly self-expand after leaving the catheter, thereby stably embolizing the vascular tract, as shown in fig. 6, the outer contour projection on one side of the cage structure 1 in this embodiment can be divided into seven sections, wherein the first section is a straight line, the second section is an arc with a diameter dii, the third section is an arc with a diameter dii, the fourth section is an arc with a diameter dii, the fifth section is an arc with a diameter dv, all of the first section, the second section, the third section, and the fourth section and the part of the fifth section form a constricted end, but if the plug head and the constricted end are not connected by the first section but by welding, the second section, the third section, the fourth section, and the fifth section form a constricted end, and the reason is that: the other part of the fifth section, the sixth section and the VII section form a large-surface end, namely the fifth section plays a role in connecting the contraction surface end with the large-surface end, wherein the VI section is a section of circular arc with the diameter of the DVI, further, the VI section can also be an inclined straight-line section, and the VII section is of a straight-line structure, and similarly, if the steel sleeve/the connecting ring and the large-surface end are not connected through the VII section but are connected through processes such as welding and the like, the VII section is not needed, namely: one part of the section V and the whole section VI form a large-face end VII;

further, a limited ratio of diameters between the arcs of the reduced end has reached a better compression and expansion performance, wherein the diameter ratio of the arc segments in the reduced end is:

DⅡ/DⅢ/DⅣ/DⅤ＝7/12/10/3

the diameter ratio of each section of circular arc in the large-surface end is as follows:

DⅤ/DⅥ＝3/15

namely, the diameter ratio of each section of circular arc in the cage-shaped structure 1 is as follows:

DⅡ/DⅢ/DⅣ/DⅤ/DⅥ＝7/12/10/3/15

furthermore, when the VI section is a straight line structure, the diameter ratio of each section of circular arc in the large-surface end is not larger than that in the VI section. Namely, the diameter ratio of each segment of circular arc in the cage-shaped structure 1 is only:

DⅡ/DⅢ/DⅣ/DⅤ＝7/12/10/3

in order to make the release of the vascular plug from the catheter into the human body safer, the embodiment adopts a conical structure, in the release process, the contracting surface end 101 of the vascular plug exists in the catheter of the delivery system, and the release speed of the contracting surface end 101 can be controlled, so that the self-expansion speed of the vascular plug is controlled, and the vascular plug is effectively prevented from being expanded too fast to hurt human tissues, but the conical structure referred to by the net structure comprises a hemispherical structure, a spherical structure, a bullet-shaped structure, a parabola rotation body type around a symmetry axis and the like, and has a structure with an inclined end surface for controlling the self-expansion speed (similar to the contracting surface end 101) in the process of releasing the vascular plug from the catheter into the human body;

in order to achieve a better blocking effect of the vascular plug, the cage-shaped structure 1 can adopt a multi-layer net structure, so that the purpose of forming the surface of the more compact cage-shaped structure 1 is achieved, and the vascular plug can be selected to be of a pure net structure or a multi-layer net structure according to actual conditions.

The net structure is woven by first metal wires, and the first metal wires are made of one or more of nickel-titanium alloy and platinum-iridium alloy; the diameter of the nitinol or platiniridium alloy is between 0.05mm and 0.15mm, but the vascular plug of the present embodiment may still use a thinner first wire in order to make the vascular plug have a smaller diameter after compression, and the braided structure referred to herein is a braided mesh structure, so the braided mesh structure should also include a mesh structure obtained by laser cutting, etching, punching, etc., and the diameter of the nitinol or platiniridium alloy is between 0.05mm and 0.15mm, and it is understood that the width of the material between meshes is between 0.05mm and 0.15mm after the material is formed into a mesh structure.

Fig. 3 shows a schematic structural diagram before the setting of the net structure, and the first cage structure 1 of the conical net structure is woven and finally set into the conical structure through the structure.

As shown in fig. 4, the cilia structure is a schematic diagram, the cilia structure 2 adopts a second metal wire structure, the cilia structure 2 is integrally composed of one or more of a plurality of fine fibers with high molecular structures such as polyethylene or polyurethane, and the diameters of the fine cilia are all between 0.05mm and 0.1mm.

As shown in fig. 5, which is an enlarged view of a portion a in fig. 4, the second wire structure includes a spring wire 201, an inner rope 202, and a fiber wool 203; the inner rope 202 is arranged in the spring wire 201, and two ends of the inner rope 202 are fixedly arranged at two ends of the spring wire 201; the fiber bristles 203 are wound on the inner rope 202, and both ends of the fiber bristles 202 protrude outside the spring wire 201 through the gap of the spring wire 201.

The number of inner cords 202 may be multiple (e.g., 2, 3, 4, etc.) or one.

In this embodiment, the fiber hairs 203 are made of Nylon or PGLA; the diameters of the micro cilia and the fine cilia are both 0.05mm to 0.1mm.

The plug head 3 is arranged at the near end of the face shrinking end 101 of the cage-shaped structure 1, and one end of the cilium structure 2 is fixedly arranged in the plug head 3; i.e. the cilia structure 2 is arranged inside the cage structure 1, one end of the cilia structure 2 and the proximal end of the cage structure 1 are together fixedly mounted inside the plug 3.

The bolt head 3 is composed of one or more of nickel-titanium alloy, platinum-iridium alloy and high polymer material.

In this embodiment, the plug 3 is provided with a screw thread structure 301 inside one end, which is connected to a delivery system, so that the delivery system delivers the vascular plug to the target site.

The steel sleeve 4 is arranged at the far end of the cage-shaped structure 1 after the large-surface end 102 is reduced, and the other end of the cilium structure 2 is fixedly arranged in the steel sleeve 4; namely, the cilia structure 2 is arranged inside the cage structure 1, and the other end of the cilia structure 2 and the far end of the cage structure 1 are fixedly arranged inside the steel sleeve 4 together.

The steel sleeve 4 is made of one or more of nickel-titanium alloy, platinum-iridium alloy and high polymer materials.

In this embodiment, the cilia structure 2 is fixed in the head 3 at one end and in the steel sleeve 4 at the other end by means of extrusion, gluing, clamping, band-winding, etc.

In this embodiment, the cage structure 1 and the ciliated structure 2 are of a compressible type, and the cage structure 1, the ciliated structure 2, the plug 3, and the steel jacket 4 are assembled and compressed and then loaded into a 5F catheter.

Compared with the prior art, the embodiment has the following beneficial effects:

(1) The cage structure of the vascular plug adopts a net-shaped braided structure so that the vascular plug can be conveyed through a small-diameter catheter, and the addition of the cilium structure enables the device to promote the effects of early blood flow obstruction and thrombus formation;

(2) The braided structure uses wires having a diameter of between 0.05 and 0.15mm, such that the vascular plug, when compressed, has a diameter of 1.0-1.2mm and can be loaded into a 5F catheter;

(3) The cage-shaped structure and the cilium structure are combined with each other, so that the vascular plug has a better effect, the cage-shaped structure has a certain effect of blocking blood vessels, and the cilium structure inside the cage-shaped structure is added, so that a structural grid structure which is more durable and stable is formed in the cage-shaped structure, thrombus is more favorably formed, the embolization efficiency is improved, and the purpose of vascular embolization is achieved;

(4) Through the design of cage type structure parcel cilium structure for this vascular stopper need not use the several the device just to realize the purpose of embolism, and the bulging force of the self of cage type structure makes its vascular stopper can be inseparable laminate with vascular inside, has improved the stability of embolism.

Example two

The vascular plug provided by the embodiment is different from the first embodiment in that:

as shown in fig. 7, the cage structure 1 of the present embodiment is shaped like a shuttle, that is, the cage structure 1 is a shuttle structure with two heads, and the inside of the cage structure 1 with two heads is filled with cilia structure 2.

Two contracting face ends 101 are arranged at two ends of the double-ended cage-shaped structure 1, one end of one contracting face end 101 is fixed with one end of the cilia structure 2 through the bolt head 3, and the other end of the contracting face end 101 is fixed with the other end of the cilia structure 2 through the steel sleeve 4.

The second embodiment is a double-head cage structure formed by changing the two-side structure of the first embodiment, namely the V-section connecting the two face-reducing ends to form the double-head structure.

However, it should be further noted that the above description is not limited to the double-headed cage structure, which refers to a structure provided with two contracting ends, that is, according to the practical situation of the user, such as limited placement position of the vascular plug, the vascular plug may also use the V-th section to connect two large faces to form a short-length double-headed cage structure, so as to adapt to the user with limited placement position.

It should be noted that, except that the shape of the cage structure of the present embodiment is different from that of the first embodiment, the other structures are similar, that is, the generation manner of the double-headed cage structure, the cilia structure, the plug head, and the steel sleeve is similar to that of the first embodiment, and the description thereof is omitted here.

EXAMPLE III

The vascular plug provided by the embodiment is different from the first embodiment in that:

the vascular plug of the present embodiment is composed of a plurality of cage-shaped structures in the shape of a cone.

As shown in fig. 8 to 9, the present embodiment will be described by taking as an example a combination of two cage structures each having a conical shape, but the number of cage structures in the present embodiment is not limited to two.

Two conical cage structures 1 are mirror symmetry and set up, and all fill cilium structure 2 in every cage structure 1, through connecting piece 7 fixed connection between two conical cage structures.

The middle part of the second cage structure 5 is crimped by the coupling piece 7 to facilitate collapsing. The connecting piece 7 is made of one or more of nickel-titanium alloy, platinum-iridium alloy and high polymer material.

As shown in figure 10, the proximal end of the cage structure in the vascular plug is fixedly connected with one end of the cilia structure through the plug 3, and the distal end of the cage structure is fixedly connected with the other end of the cilia structure through the steel sleeve 4.

Because the flow direction of blood in the blood vessel is determined, according to the actual situation, the two cage structures 1 which are mirror images of each other have the same or different layer numbers of the net structures, that is, the layer number of one net structure may be the same or different from that of the other net structure, and may be specifically set according to the actual situation.

Because the flow direction of blood in the blood vessel is determined, the environments of the first blood vessel plug and the second blood vessel plug which are distributed at two ends of the blood vessel plug are different, if the shapes of the cage-shaped structures are the same, but the sizes of the geometric structures can be the same or different.

It should be noted that, if the shapes and the number of layers of the plurality of cage structures are different, the cage structures are realized by other methods; if the shapes and the layer numbers of the plurality of cage-shaped structures are the same, the cage-shaped structures can be formed by integrally weaving the first metal wires. The schematic view of the integral braiding of the cage structure is shown in fig. 11.

Simultaneously in order to guarantee that its junction of integrative woven formation's cage type structure has less diameter, at first do benefit to this vascular stopper of compression, secondly do benefit to this vascular stopper and form two jam positions, increased this vascular stopper's stability.

As shown in figure 12, the ciliated structure 2 may be formed by integral moulding and then filled in a cage-like structure.

In this embodiment, the specific forming manner of the bolt head, the cage structure, the coupling member, and the steel sleeve is similar to that of the embodiment, and will not be described herein.

In this embodiment, the cage structure is of a compressible type, and the cage structure, ciliated structure, plug, coupling member and steel sleeve are assembled to compress and then loaded into a 5F catheter.

As shown in fig. 13, which is a schematic view of delivering the vascular plug to a target position of a blood vessel, the delivery device is connected with the internal thread of the plug head, then the vascular plug is delivered to the target position through the delivery device, and finally the purpose of vascular embolization is achieved through subsequent operations.

It should be noted that, if a plurality of cage structures with conical shapes are adopted, they need to be sequentially arranged in a mirror image manner, that is, the cage structures are even numbers, and a pair of cage structures which are arranged in a mirror image manner are connected to each other.

Compared with the prior art, the embodiment has the following beneficial effects:

(1) The cage-shaped structure of the vascular plug adopts a biconical braided structure, so that the vascular plug can be conveyed through a small-diameter catheter, and the device can promote the effects of early blood flow obstruction and thrombus formation due to the addition of the cilium structure;

(2) The braided structure uses wires having a diameter of between 0.05 and 0.15mm, such that the vascular plug, when compressed, has a diameter of 1.0-1.2mm and can be loaded into a 5F catheter;

(3) Through cage type structure and cilium structure intercombination for this vascular stopper has better effect, and cage type structure self just has certain vascular effect of blockking up, is adding inside cilium structure, makes its structural grid structure more lasting and stable in cage type structural formation, does benefit to the formation of thrombus more and improves embolism efficiency, realizes the purpose of vascular embolism.

Example four

The vascular plug provided by the embodiment is different from the third embodiment in that:

the vascular plug of the embodiment is composed of a conical cage-shaped structure and a shuttle-shaped cage-shaped structure.

The method comprises the following specific steps: the cage structure of the first embodiment is connected to the cage structure of the second embodiment by a connecting member.

The connection sequence in this embodiment is not limited, and may be set according to actual situations.

The two shuttle-shaped cage structures of the present embodiment are different in shape, and may also adopt structures having different geometric structures and sizes.

EXAMPLE five

The vascular plug provided by the embodiment is different from the second embodiment in that:

the vascular plug of the present embodiment is composed of a plurality of cage-shaped structures shaped as shuttles.

As shown in fig. 14, each shuttle-shaped cage structure 1 is fixedly connected with each other by a connecting piece 7, and each shuttle-shaped cage structure 1 is filled with cilia structures 2.

The near end of the cage structure in the vascular plug is fixedly connected with one end of the cilium structure through a plug 3, and the far end of the cage structure is fixedly connected with the other end of the cilium structure through a steel sleeve 4.

Similar to the third embodiment, the number of layers of the mesh structures of the plurality of shuttle-shaped cage structures 1 may be the same or different, that is, the number of layers of one mesh structure may be the same or different from the number of layers of another mesh structure, and may be specifically set according to the actual situation.

The geometric dimensions of the plurality of shuttle-shaped cage structures 1 can be identical or different.

The plurality of shuttle-shaped cage structures 1 and the cilia structures 2 can be formed by integrally weaving, specifically, reference is made to the third embodiment, and redundant description is not given in this embodiment.

In this embodiment, the number of the shuttle-shaped cage structures 1 is not limited, and may be singular or even, and may be limited according to actual situations.

In this embodiment, the specific forming manner of the bolt head, the cage structure, the coupling member, and the steel sleeve is similar to that of the second embodiment, and will not be described herein.

In this embodiment, the cage structure is of a compressible type, and the cage structure, ciliated structure, plug, coupling and steel sleeve are assembled to compress and then loaded into a 5F catheter.

EXAMPLE six

The vascular plug provided by the embodiment is different from the vascular plugs provided by the first, second, third, fourth and fifth embodiments in that:

the shrinkage end 101 of the cage-shaped structure 1 is provided with a coating film, and the coating film is made of one or a composite material consisting of PET, polyurethane, PTFE and e-PTFE; for example, PTFE is primarily an inner and outer membrane bonded to each other at high temperatures; if the silica gel is used, the liquid state is adhered to the bracket and then is solidified, and the silica gel does not need to be sewn, so that the integrity of the sealing film is not damaged, and the adhesion degree can be ensured.

The thickness of the coating film is 0.01 to 1mm, because the strength and toughness are better when the thickness of the coating film is 0.01 to 1mm.

The vascular plug of this embodiment carries out the adjustment of size according to the blood vessel internal diameter scope of difference, and to the blood vessel of great diameter, its inside blood flow is great relatively, and the impact force of receiving relatively behind the embolism is great, so carry out the one end side tectorial membrane of cage type structure for the thrombus through the ciliary structure formation is difficult to receive the impact in the cage type structure, so can not broken up by the impact force of blood flow, thereby the more stable blood vessel embolism that carries on.

To sum up, the utility model provides a shape portion of cage type structure is limited to providing, and the compound mode of a plurality of cage type structures is also not limited to providing, and the number of piles, shape, the size of every cage type structure all can be set for through actual conditions.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (12)

1. A vascular plug is characterized by comprising a cage-shaped structure, wherein the interior of the cage-shaped structure is filled with a cilium structure; the near end of the cage-shaped structure is fixed with one end of the cilium structure through a bolt head, and the far end of the cage-shaped structure is fixed with the other end of the cilium structure through a steel sleeve.

2. A vascular plug as claimed in claim 1, wherein the cage structure is conical or fusiform in shape.

3. A vascular plug as claimed in claim 2, wherein the vascular plug comprises one or more cage structures.

4. A vascular plug as in claim 1 wherein the cage structure is a single or multi-layered mesh structure.

5. The vascular plug of claim 4, wherein the mesh structure is woven from a first metal wire, the first metal wire being one or more of nitinol and pt-ir; the diameter of the nickel-titanium alloy or the platinum-iridium alloy is between 0.05mm and 0.15 mm.

6. A vascular plug as claimed in claim 1, wherein the securing means of the two ends of the ciliated structure includes one or more of compression fixing, adhesive fixing, clip fixing, and band wrapping fixing.

7. A vascular plug as in claim 1, wherein the ciliated structure is a second wire structure; the second metal wire structure comprises spring wires, inner ropes and fiber wool; the inner rope is arranged in the spring wire, and two ends of the inner rope are fixedly arranged at two ends of the spring wire; the fiber hair is wound on the inner rope, and two ends of the fiber hair extend out of the outer side of the spring wire through the gap of the spring wire; the fiber hair is made of Nylon Nylon or poly (lactide-co-glycolide) PGLA; the diameter of the fiber wool is 0.05 mm-0.1 mm.

8. A vascular plug as claimed in claim 1, wherein the ciliated structure is formed of a plurality of fine fibres of polymeric structure, the fine fibres having a diameter of 0.05mm to 0.1mm.

9. A vascular plug as claimed in claim 3, wherein the cage structures are fixedly connected by a coupling member.

10. A vascular plug as claimed in claim 9, wherein the coupling member is formed from one of nitinol, platiniridium, or a polymeric material; the bolt head and the steel sleeve are both made of one of nickel-titanium alloy, platinum-iridium alloy and high polymer materials.

11. A vascular plug as claimed in claim 1, wherein the plug head is provided with an internal thread formation at one end, the internal thread formation being connected to a delivery system.

12. The vascular plug as claimed in claim 1, wherein the cage structure is provided with a coating, and the coating is made of one of PET, polyurethane, PTFE and e-PTFE; the thickness of the film is 0.01mm-1mm.

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