CN114424991A - A new type of vascular stent - Google Patents

Abstract

The invention discloses a novel blood vessel stent, which comprises a main body stent and a movable stent; the main body bracket comprises a first connecting ring, a second connecting ring and a supporting net connected between the first connecting ring and the second connecting ring, and a first ring chute and a second ring chute are respectively arranged on the opposite inner side surfaces of the first connecting ring and the second connecting ring; the movable support comprises a plurality of inner ring supporting rods and outer ring supporting rods which are movably connected between a first connecting ring and a second connecting ring, the inner ring supporting rods and the outer ring supporting rods are arranged in a grid-shaped staggered mode in the circumferential direction, no position interference exists between the inner ring supporting rods and the outer ring supporting rods in the radial direction, and an inner ring supporting rod stop block and an outer ring supporting rod stop block which are used for realizing the irreversible gathering process of the inner ring supporting rods and the outer ring supporting rods are arranged on the inner ring surface and the outer ring surface of the first connecting ring and the second connecting ring respectively. Inside and outside ring branch can increase local concentration after gathering together in opposite directions, just to hemangioma position with local dense district, in blood can't flow into hemangioma, can reduce hemangioma's risk coefficient, can play the expansion vascular wall again simultaneously, supports vascular effect.

Description

A new type of vascular stent

technical field

The invention belongs to the technical field of medical equipment, and in particular relates to a novel adjustable blood vessel stent for solving the problem of arterial stenosis.

Background technique

With the development and progress of society, the way of life of human beings has also undergone earth-shaking changes. Some bad living habits can lead to the outbreak of cardiovascular and cerebrovascular diseases. Cardiovascular and cerebrovascular diseases have the characteristics of high prevalence, high disability rate and high mortality rate. The number of people who die of cardiovascular and cerebrovascular diseases in the world is as high as 15 million every year. threaten human life and health.

At present, vascular stent interventional therapy has become an important means to solve cardiovascular blockage caused by atherosclerosis. Vascular stenting refers to placing an inner stent in the diseased segment on the basis of lumen balloon dilation to support the stenotic and occluded segment. It is an external structure for the purpose of reducing the elastic retraction and reshaping of blood vessels and maintaining the smooth blood flow of the lumen. This method is widely used in clinical because of its characteristics of small surgical trauma, simple operation and good effect. The comprehensive effect and postoperative recurrence are quite controversial, especially when there is a hemangioma in the blood vessel, ordinary stents cannot prevent the rupture of the hemangioma.

In order to solve this problem, those skilled in the art have made corresponding improvements to the vascular stent structure, such as a combined positioning stent disclosed in Chinese patent CN 214907528 U, wherein the aneurysm support structure is in the shape of a lotus flower, and the main structure of the stent is related to the aneurysm. The support structure is directly connected, the main stent and the side stent are connected by an I-shaped structure, and the development points are distributed on the side wall of the stent body and the top of the aneurysm support structure. The lotus-shaped aneurysm support structure has a blocking effect on blood flowing into the aneurysm. It can also reduce the impact of turbulent flow in the aneurysm on the aneurysm wall, which can reduce the risk of aneurysm rupture. However, the stent structure mainly solves the problem that blood cannot flow normally at the nearby bifurcation due to the continuous sliding of the stent. It is difficult to directly apply to conventional straight-through blood vessels to deal with the problem of hemangioma rupture.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a novel vascular stent in response to the problems raised in the background art, which can cope with the problems of partial sealing of hemangioma, postoperative rehabilitation, and re-blocking of blood vessels, and provide certain protection for the function of blood vessels of patients.

The technical scheme of the present invention is as follows: a novel vascular stent, including a main body stent and a mobile stent; the main body stent includes a first connection ring, a second connection ring and a support net connected between the two, and the first connection ring The opposite inner surfaces of the ring and the second connecting ring are respectively provided with a first ring chute and a second ring chute with the same structure; Several inner ring struts and outer ring struts, the inner ring struts and the outer ring struts are arranged in a grid-like staggered arrangement in the circumferential direction and there is no positional interference between them in the radial direction. There is an outer ring support rod block on the ring surface, the inner ring support rod block 1 is provided on the inner ring surface, and an outer ring support rod block is provided on the outer ring surface on the top of the second connecting ring. Two inner ring support rod stops are arranged on the annular surface, and the outer ring support rod blocks and the inner ring support rod blocks on the first connecting ring and the second connecting ring are arranged staggered.

Further, the top end of the support net is fixedly embedded in the first annular chute, and the bottom end is fixedly embedded in the second annular chute, and the support net connects the first connecting annular ring and the second connecting annular ring as a whole.

Further, the structure of the outer ring support rod block 1 and the outer ring support rod block 2 are the same, and the outer ring support rod block 1 and the outer ring support rod block 2 are directed to the first circular ring chute and the second circular ring respectively. One side of the chute protrudes, and the protruding end is a side slope structure, and the side slope structure is inclined from the side of the support net to the side away from the support net.

Further, the structures of the first inner ring support rod stopper and the second inner ring support rod stopper are the same; Slope structure, the slopes of the inner ring support rod block 1 and the inner ring support rod block 2 are opposite to each other, and the inner ring support rod block 1 is inclined downward from the side of the support net to the side away from the support net, and the inner ring support rod block is inclined downward. The second rod stopper is inclined upward from the side of the support net to the side away from the support net.

Further, the first outer ring support rod block, the first inner ring support rod block, the second outer ring support rod block and the second inner ring support rod block are all made of elastic materials.

Further, the inner ring support rod includes an inner ring support rod main body and an inner ring slider, and two inner ring sliders are respectively provided on both ends of the inner ring support rod main body. The shape of the groove is adapted, the inner ring sliders at both ends of the inner ring support rod are matched and connected in the circular ring chute on the corresponding side and can slide along the chute, and the main body of the inner ring support rod is placed on the first connecting circle in the radial direction. between the ring and the inner ring of the second connecting ring.

Further, the outer ring support rod includes an outer ring support rod main body and an outer ring slider, an outer ring slider is respectively provided at both ends of the outer ring support rod main body, and the shape of the outer ring slider is the same as that of the first annular sliding groove. The outer ring sliders at both ends of the outer ring support rod are matched and connected in the circular ring chute on the corresponding side and can slide along the chute, and the outer ring support rod body is radially placed on the first circular ring slide. between the groove and the notch of the second ring chute.

Further, the inner side surface of the outer ring strut body is in contact with the outer side surface of the inner ring strut body.

Further, in the initial state, the inner ring struts and the outer ring struts are distributed in a staggered grid shape between the first connecting ring and the second connecting ring, and the distribution range extends from one end of the support net to the other end, and the outer ring After the strut and the inner ring strut move toward each other from both sides to the gathering area formed by the staggered enclosure between the outer ring strut stopper and the inner ring strut stopper, the inner ring strut and the outer ring strut appear. In the state of close contact with no gap in the radial direction, neither the inner ring support rod nor the outer ring support rod can slide any more at this time, and the mobile support is on the opposite side of the support net. Compared with the prior art, the present invention has the advantages of The following advantages:

1. In this application, a mobile support composed of several inner ring struts and outer ring struts is provided between the connecting rings, and the inner ring struts and the outer ring struts can slide relative to the annular chute at both ends. After the location of the hemangioma is determined, the inner and outer ring struts can form a closed partial structure with inner and outer double layers on the opposite side of the support net through the irreversible gathering and moving process, and the inner and outer ring struts are radially close to each other. There is no gap in the middle, and the local density is increased. The closed local structure against the hemangioma can effectively prevent blood from flowing into the hemangioma from the stent, thereby reducing the risk factor of the hemangioma;

2. After the vascular stent disclosed in this application is placed in the diseased segment, it can not only prevent blood from flowing into the hemangioma, but also can expand the blood vessel wall and support the blood vessel by the supporting mesh and the mobile stent. The protection of the local blood vessel wall will not hinder the normal circulation of blood in the blood vessels;

3. The vascular stent disclosed in the present application can be placed at any stenotic position in the blood vessel during use, and the sliding friction of the inner and outer ring struts is increased by the internal pressure of the arterial vessel wall, thereby forming a certain stability, Its compliance enables it to maintain good mechanical properties in the harsh environment of arterial vessels.

Description of drawings

Fig. 1 is a structural schematic diagram of a novel vascular stent;

Fig. 2 is the structural representation of main body bracket;

Fig. 3 is the structural representation of inner ring strut;

Fig. 4 is the structural representation of outer ring strut;

Figure 5 is a schematic diagram after assembling an inner ring support rod and an outer ring support rod on the main body bracket;

Fig. 6 is the structural representation after the inner ring strut and the outer ring strut are all gathered and contracted;

Fig. 7 is the positional relationship diagram of the outer ring support rod block 2 and the inner ring support rod block 2 after the inner ring support rod and the outer ring support rod are all gathered and contracted;

8 is a schematic diagram of the effect of the traditional vascular stent and the novel vascular stent disclosed in Example 1 when dealing with hemangiomas; wherein, a is a schematic diagram of the effect of the traditional vascular stent on hemangioma, and b is the novel vascular stent disclosed in Example 1. Schematic diagram of the effect of stent in coping with hemangioma

Among them, 1-main body bracket, 2-mobile bracket;

11-the first connecting ring, 12-the second connecting ring, 13-supporting net;

121-Second ring chute, 122-Outer ring support rod block 2, 123-Inner ring support rod block 2;

21-inner ring strut, 22-outer ring strut;

211-inner ring strut body, 212-inner ring slider;

221-outer ring strut body, 222-outer ring slider.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings, but are not limited thereto. Any modification or equivalent replacement of the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention shall be included in the present invention. within the scope of protection.

Example 1

In order to effectively reduce the risk of hemangioma rupture after stent intervention, a novel vascular stent is disclosed in this embodiment, which includes a main stent 1 and a mobile stent 2. The main stent 1 plays an overall supporting and conducting effect. , the main body bracket 1 includes a first connecting ring 11, a second connecting ring 12 and a supporting net 13, and the first connecting ring 11 and the second connecting ring 12 are respectively provided with the same structure on the inner surfaces opposite to each other. The annular chute and the second annular chute 121, the top end of the support net 13 is fixedly embedded in the first annular chute, and the bottom end is fixedly embedded in the second annular chute 121. The connecting ring 11 and the second connecting ring 12 are connected to form an integral structure, and the support mesh 13 is made of conventional vascular stent material, and only needs to be woven into an arc-shaped one-piece mesh structure.

The movable bracket includes several inner ring struts 21 and several outer ring struts 22. Specifically, in this embodiment, the first connecting ring 11 and the second connecting ring 12 are movably connected at a position other than the support net 13. There are eighteen inner ring struts 21 and eighteen outer ring struts 22. The number of inner ring struts 21 and outer ring struts 22 is not specifically limited, and can be adjusted according to actual needs. The outer ring support rods 22 are arranged in a staggered circumferential direction between the first connecting ring 11 and the second connecting ring 12, that is, an inner ring support rod 21 and an outer ring support rod 22 are staggered in the circumferential direction, and the inner ring support rod 22 is staggered. The rod 21 and the outer ring support rod 22 are in the relationship between the inner and outer rings in the radial direction, and there is no interference between the radial directions. , The inner ring surface is provided with an inner ring support rod block 1, an outer ring support rod block 2 122 is provided on the outer ring surface on the top of the second connecting ring 12, and an inner ring support rod block is provided on the inner ring surface. Block 2 123, a gathering area is formed between the outer ring strut stopper and the inner ring strut stopper. Since the inner ring strut 21 and the outer ring strut 22 are in a state of staggered inclination, it is only necessary for the hysteresis to enter the gathering area. The strut end can be limited, and then the outer ring strut stopper and the inner ring strut stopper on the first connecting ring 11 and the second connecting ring 12 need to be staggered, that is, the inner ring strut stopper is one. Correspondingly arranged on the side of the second outer ring support rod block 122 in the circumferential direction, and the outer ring support rod block 1 is correspondingly arranged on the side of the second inner ring support rod block 123 in the circumferential direction;

The structure of the outer ring support rod block 1 and the outer ring support rod block 2 122 is the same, and the structure of the inner ring support rod block 1 and the inner ring support rod block 2 123 is the same;

The outer ring support rod block 1 and the outer ring support rod block 2 122 respectively protrude to one side of the first annular chute and the second annular chute 121, and the protruding end is a side slope structure. The structure is inclined from the side of the support net 13 to the side away from the support net, and the inclined block can guide the moving outer ring support rod 22, so that the outer ring support rod 22 can be squeezed over the outer ring support rod. The stops are gathered towards each other and will not be spread out in the opposite direction;

The inner ring support rod block 1 and the inner ring support rod block 2 123 are longitudinal slope structures that do not protrude to the annular chute, and the inclination directions of the inner ring support rod block 1 and the inner ring support rod block 2 123 are opposite to each other. , the inner ring support rod block 1 is inclined downward from the side of the support net 13 to the side away from the support net, and the inner ring support rod block 2 123 is inclined upward from the side of the support net to the side away from the support net, and the inclined shape The stopper can guide the moving inner ring support rod 21, so that the inner ring support rod 21 can be squeezed over the stopper of the inner ring support rod and then gather toward each other and not spread out in reverse.

In order to ensure that the inner ring support rod 21 and the outer ring support rod 22 can smoothly pass over the corresponding blocks and then gather toward each other, the outer ring support rod block and the inner ring support rod block are made of elastic materials, and the inner ring support rod is made of elastic material. 21 and the outer ring support rod 22 are gathered towards each other, the inner and outer support rods passing through the inner ring support rod stopper or the outer ring support rod stopper will produce pressure on the corresponding support rod stopper, and the support rod stopper will be closed. It will be compressed and deformed by force so that the inner and outer struts can smoothly pass over the strut stopper. Once the inner and outer struts pass over the corresponding strut stops, the strut stops will return to their original shape, and the back of the slope is vertical, which cannot guide the inner and outer struts, so the inner and outer struts cannot be reversed. sports

The inner ring support rod 21 includes an inner ring support rod main body 211 and an inner ring sliding block 212. Two inner ring sliding blocks 212 are respectively provided on the two end sides of the inner ring supporting rod main body 211. The shape of the inner ring sliding block 212 is the same as that of the first block. The shapes of the ring chute and the second ring chute 121 are adapted, and the inner ring sliders 212 at both ends of the inner ring support rod 21 match the first and second ring chute 121 connected to the corresponding side. The inner ring support rod body 211 is placed between the inner rings of the first connecting ring 11 and the second connecting ring 12 in the radial direction.

The outer ring support rod 22 includes an outer ring support rod main body 221 and an outer ring sliding block 222. An outer ring sliding block 222 is respectively provided at both ends of the outer ring supporting rod main body 221. The shape of the outer ring sliding block 222 is the same as that of the first circle. The shapes of the ring sliding groove and the second circular ring sliding groove 121 are matched, and the outer ring sliding blocks 222 at both ends of the outer ring support rod 22 are matched and connected in the first circular ring sliding groove and the second circular ring sliding groove 121 on the corresponding side. And can slide along the chute, the outer ring support rod main body 221 is placed between the slots of the first annular chute and the second annular chute 121 in the radial direction.

The inner side surface of the outer ring strut body 221 is in contact with the outer side surface of the inner ring strut body 211 .

In the initial state, the inner ring struts 21 and the outer ring struts 22 are distributed in a staggered grid shape between the first connecting circle 11 and the second connecting circle 12, and the distribution range extends from one end of the support net 13 to the other end, The outer ring support rod 22 and the inner ring support rod 21 move toward each other from both sides until they are both located behind the gathering area formed by the staggered enclosure between the outer ring support rod block and the inner ring support rod block (that is, the outer ring support rod 22 as a whole). Placed between the two outer ring strut blocks and the inner ring strut 21 is also placed between the two inner ring strut blocks at this time), the inner ring strut 21 and the outer ring strut 22 show In the state of close contact with no gap in the radial direction, the inner ring support rod 21 and the outer ring support rod 22 can no longer slide at this time, and the movable bracket 2 is on the side opposite to the support net 13 as a whole.

The working principle of the vascular stent is as follows: the vascular stent in the initial state (at this time, the mobile stent 2 is in a state of staggered grid distribution, and extends from one end of the supporting mesh 13 to the other end in the circumferential direction) is placed into the lesion segment After determining the position of the hemangioma, place the support mesh 13 on the opposite side of the hemangioma, and then use external instruments to push the outer ring strut 22 and the inner ring strut 21 from both sides to make them converge toward each other. , the outer ring support rods 22 on both sides correspondingly cross the outer ring support rod block 1 or the outer ring support rod block 2 122 and then gather close to each other, and the inner ring support rods 21 on both sides correspondingly cross the inner ring support rod block 1 Or the inner ring support rod block 2 123 is gathered in close proximity to each other. Since the outer ring support rod block and the inner ring support rod block are both slope-shaped, the outer ring support rod 22 and the inner ring support rod 21 cross the corresponding position. Both the outer ring support rod block and the inner ring support rod block cannot move in the opposite direction. The movement process is irreversible. When the outer ring support rod 22 and the inner ring support rod 21 outside the block When the outer ring struts 22 and the inner ring struts 21) between the nets 13 move over the corresponding blocks to the gathering area between the blocks (as shown in Figures 6 and 7), the inner ring struts 21 and the outer ring The struts 22 are gathered to form a closed area, showing a double-layered closed local structure inside and outside, which can achieve the effect of local densification. Since the inner ring strut 21 and the outer ring strut 22 are close in the radial direction, there is no middle There is a gap, so it can prevent the blood from flowing in from the middle, which can effectively prevent the blood from flowing into the hemangioma from the stent, thereby reducing the risk factor of the hemangioma, (as shown in the panel b in Figure 8, the panel b just does Here is a simple illustration of the position state of the mobile stent in use. It is mainly to see that the support mesh 13 and the mobile stent 2 are in an opposite position. The mobile stent 2 is used to resist and seal the hemangioma, so it is not used. The outer ring strut 22 and the inner ring strut 21 are drawn as a complete and airtight effect, but in reality, the two are close to each other in this state), but the traditional mesh-shaped vascular stent (as shown in Figure 8 a (shown in the small figure) has no such effect, and the stent structure disclosed in this embodiment can also protect the local blood vessel wall.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (9)

1. A novel blood vessel stent is characterized by comprising a main body stent and a movable stent;

the main body bracket comprises a first connecting ring, a second connecting ring and a supporting net connected between the first connecting ring and the second connecting ring, wherein a first ring chute and a second ring chute which have the same structure are respectively arranged on the opposite inner side surfaces of the first connecting ring and the second connecting ring;

the movable support comprises a first movable support body, a second movable support body and a plurality of inner ring supporting rods and outer ring supporting rods, wherein the second movable support body is movably connected with the inner ring supporting rods, the inner ring supporting rods and the outer ring supporting rods are circumferentially arranged in a grid-shaped staggered mode and do not have position interference between the radial direction, a first outer ring supporting rod stop block is arranged on the outer ring surface of the bottom of the first connecting ring, a first inner ring supporting rod stop block is arranged on the inner ring surface, a second outer ring supporting rod stop block is arranged on the outer ring surface of the top of the second connecting ring, a second inner ring supporting rod stop block is arranged on the inner ring surface, and the outer ring supporting rod stop block and the inner ring supporting rod stop block on the first connecting ring and the second connecting ring are arranged in a staggered mode.

2. The novel blood vessel stent as claimed in claim 1, wherein the top end of the supporting net is fixedly embedded in the first circular groove, the bottom end of the supporting net is fixedly embedded in the second circular groove, and the supporting net connects the first connecting ring and the second connecting ring into a whole.

3. The novel blood vessel support as claimed in claim 1, wherein the first outer ring strut stopper and the second outer ring strut stopper have the same structure, the first outer ring strut stopper and the second outer ring strut stopper respectively extend to one side of the first circular sliding groove and the second circular sliding groove, and the extending end is a side slope structure which inclines from one side of the support net to the side far away from the support net.

4. The novel blood vessel stent as claimed in claim 1, wherein the inner ring strut block I and the inner ring strut block II have the same structure; the first inner ring support rod check block and the second inner ring support rod check block are of a longitudinally inclined slope structure which does not protrude to the circular ring sliding groove part, the inclined slope directions of the first inner ring support rod check block and the second inner ring support rod check block are opposite, the first inner ring support rod check block inclines downwards from one side of the support net to one side far away from the support net, and the second inner ring support rod check block inclines upwards from one side of the support net to one side far away from the support net.

5. The novel blood vessel stent as claimed in claim 1, wherein the first outer ring strut stopper, the first inner ring strut stopper, the second outer ring strut stopper and the second inner ring strut stopper are made of elastic material.

6. The novel blood vessel support as claimed in claim 1, wherein the inner ring strut comprises an inner ring strut main body and inner ring sliding blocks, the inner ring sliding blocks are respectively arranged on the two side surfaces of the inner ring strut main body, the shape of the inner ring sliding blocks is matched with that of the first ring sliding groove, the inner ring sliding blocks at the two ends of the inner ring strut are matched and connected in the ring sliding grooves on the corresponding side and can slide along the sliding grooves, and the inner ring strut main body is radially arranged between the inner rings of the first connecting ring and the second connecting ring.

7. The novel blood vessel stent according to claim 6, wherein the outer ring strut comprises an outer ring strut main body and an outer ring slider, two ends of the outer ring strut main body are respectively provided with an outer ring slider, the outer ring slider has a shape matched with that of the first ring chute, the outer ring sliders at two ends of the outer ring strut are connected in the ring chutes at the corresponding sides in a matching manner and can slide along the chutes, and the outer ring strut main body is arranged between the notches of the first ring chute and the second ring chute in the radial direction.

8. The novel blood vessel stent of claim 7, wherein the inner side of the outer ring strut body is in contact with the outer side of the inner ring strut body.

9. The novel blood vessel stent as claimed in claim 1, wherein, in the initial state, the inner ring struts and the outer ring struts are distributed in a staggered grid pattern between the first connecting rings and the second connecting rings, the distribution range extends from one end of the supporting net to the other end, after the outer ring struts and the inner ring struts are moved from both sides to the gathering areas formed by the staggered surrounding between the outer ring strut stoppers and the inner ring strut stoppers, the inner ring struts and the outer ring struts are in a state of clinging to each other without gaps in the radial direction, the inner ring struts and the outer ring struts cannot slide again, and the movable stent is integrally positioned on the side opposite to the supporting net at this time.

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