CN219374794U - Novel bifurcation aneurysm plugging system - Google Patents

Abstract

The utility model discloses a novel bifurcation aneurysm plugging system, which comprises: the woven net frame has self-expansibility, is suitable for plugging the aneurysm after release and is self-adaptive to the shape of the aneurysm; and the sculptured bracket is connected with the woven net frame, has self-expansibility and is suitable for being clung to the bifurcation vessel wall below the aneurysm after being released. The utility model can effectively seal the neck position of the tumor, directly release the sealing net in the aneurysm for sealing, and is attached to the neck position of the tumor, thereby avoiding the recurrence of the neck position of the tumor. The utility model is supported and arranged in the blood vessel wall by the engraving bracket, thereby reducing the space occupying effect and reducing the influence on other branch blood vessels of the bifurcation part.

Description

Novel bifurcation aneurysm plugging system

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a novel bifurcation aneurysm plugging system.

Background

Aneurysms are very common vascular diseases in which the incidence of intracranial aneurysms is secondary to cerebral thrombosis, which is associated with hypertension, cerebral arteriosclerosis, infection, trauma, etc., and is well developed in the middle-aged and elderly people 40-60 years. The swelling and beating mass is mainly expressed and can occur at any part of the arterial system. Once the aneurysm ruptures, serious consequences may occur. If the intracranial aneurysm breaks, the subarachnoid hemorrhage is caused, and serious cases can cause vascular spasm to cause wide cerebral infarction, thereby causing hemiplegia, coma and the like.

Traditional intracranial aneurysm treatment approaches include: 1) Surgical treatments such as: aneurysm neck occlusion, aneurysm neck ligation, osteotomy of giant aneurysms, and the like; 2) Medical drug therapy, which is commonly used for uncracked stable aneurysms, is mainly aimed at controlling potential risk factors that can induce rupture of the aneurysm, such as controlling blood pressure of a patient, etc., by means of drugs; 3) Minimally invasive interventional procedures such as: the spring ring fills the aneurysm cavity, the liquid glue fills the aneurysm cavity, the stent assists in filling, etc.

The disadvantage of coil embolization is the increased cost due to the placeholder effect and the need for additional stent assistance. The disadvantage of a balloon embolism is the placeholder effect, being only suitable for a specific aneurysm shape, and the need for stent assistance, resulting in increased costs. During embolization, rupture of an aneurysm and bleeding are one of the serious complications, which often occur when a microcatheter enters the lumen of the aneurysm, the head end breaks the bleeding site of the original aneurysm, or when a 3D spring is prevented from being turned into a basket, the ring is harder or is selected to be bigger. Therefore, a blood flow guiding device is often selected for occlusion, but the blood flow guiding device has the defects of delayed rupture of an aneurysm, occlusion of other tiny branches, and increased cost and space occupation caused by the possibly needed assistance of a filling spring coil.

Intracranial bifurcation aneurysms are common intracranial aneurysms and are mostly wide-necked aneurysms, accounting for about 30% of ruptured aneurysms. Aiming at the aneurysm treatment of the bifurcation part, whether the Y-shaped double-stent assisted embolization operation or the 'shenlong tail-swing' operation (i.e. the stent is transversely placed in the aneurysm-carrying artery of the bifurcation part by means of self rebound when the stent is released), the technical requirements on operators are higher, and complications such as thrombus and the like are easy to generate after the operation.

The other currently used device is a WEB device with a plurality of intratumoral turbulence devices, has the advantage of simple operation, only aims at the aneurysm, does not influence the carrying aneurysm, but has higher requirement on the size of the adaptive aneurysm, and has a narrow application range of single products, so that the requirement on selection is high, and the aneurysm can not be completely occluded by shifting easily after the size is misplaced. However, the aneurysm embolism is not compact, the aneurysm cavity, particularly the aneurysm neck, has residues, and along with the continuous high blood pressure after the operation of a patient, the blood flow is flushed, and the aneurysm can relapse in a certain period.

Disclosure of Invention

Therefore, the utility model aims to overcome the defects that the existing intracranial aneurysm treatment technology has a space occupying effect, is easy to displace, and the aneurysm neck is remained to cause possible recurrence of the aneurysm, thereby providing a novel bifurcation aneurysm plugging system.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a novel bifurcated aneurysm occlusion system comprising:

the woven net frame has self-expansibility, is suitable for plugging the aneurysm after release and is self-adaptive to the shape of the aneurysm;

and the sculptured bracket is connected with the woven net frame, has self-expansibility and is suitable for being clung to the bifurcation vessel wall below the aneurysm after being released.

According to the further optimized technical scheme, the woven net frame is hemispherical or spherical or ellipsoidal or bowl-shaped.

Further optimizing the technical scheme, be provided with on the woven rack and can prevent the sculpture support gets into the spacing portion of aneurysm.

Further optimizing the technical scheme, the woven net rack is a biocompatible net rack.

According to the technical scheme, the carving support is formed by fixing a plurality of pipelines in a staggered mode, and each pipeline is staggered to form a plurality of unit cells.

According to the technical scheme, the unit cells of the engraving support are changed from small to large from the middle section to the two ends.

Further optimizing the technical scheme, the both ends of sculpture support set up to the horn mouth type.

Further optimizing the technical scheme, the carving support is a biodegradable support.

Further optimizing the technical scheme, the carving support is a biocompatible support.

The technical scheme of the utility model has the following advantages:

1. the novel bifurcation aneurysm plugging system provided by the utility model has the advantages of stable structure, difficult displacement, simple and convenient operation and release, and capability of preventing aneurysm recurrence. The utility model can effectively seal the neck position of the tumor, directly release the sealing net in the aneurysm for sealing, and is attached to the neck position of the tumor, thereby avoiding the recurrence of the neck position of the tumor.

The utility model is supported and arranged in the blood vessel wall by the engraving bracket, thereby reducing the space occupying effect and reducing the influence on other branch blood vessels of the bifurcation part. Firstly, supporting the aneurysm after plugging, so as to avoid the stenosing of the aneurysm-carrying artery after plugging; secondly, the blockage of the branch blood vessel caused by the occupation of the branch blood vessel is avoided.

2. The novel bifurcation aneurysm plugging system provided by the utility model is simple in selection, matching and operation: the size of the single carving support can adapt to various focus conditions, the blocking and the supporting are integrated, and meanwhile, the single carving support enters and is released, so that the safety in operation is ensured, the risk of delayed rupture of the aneurysm can be reduced, and other branches are prevented from being blocked.

3. According to the novel bifurcation aneurysm plugging system provided by the utility model, the limiting part is arranged on the woven net frame, so that the carving support can be prevented from entering the aneurysm by the limiting part, and the microcatheter can be conveniently used for pushing the whole system.

4. The novel bifurcated aneurysm plugging system provided by the utility model has the advantages that the sculptured stent is a biodegradable stent, and the radial force of the sculptured stent is strong enough to be implanted and supported so as to stabilize the conditions of injury and vascular retraction.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a novel knitted net rack of the present utility model in a hemispherical structure;

FIG. 2 is a schematic view of the cross section and the internal structure of the novel hemispherical braided net frame provided by the utility model;

FIG. 3 is a schematic view of the external structure of the novel hemispherical woven mesh frame provided by the utility model;

FIG. 4 is a schematic structural view of the novel woven net rack provided by the utility model when the novel woven net rack is spherical;

FIG. 5 is a schematic view of the cross section and the internal structure of the novel spherical woven net rack provided by the utility model;

FIG. 6 is a schematic view of the external structure of the novel spherical woven wire frame provided by the utility model;

FIG. 7 is a schematic view of the structure of the novel woven net rack provided by the utility model when the novel woven net rack is bowl-shaped;

FIG. 8 is a schematic view of the external structure of the novel bowl-shaped woven net rack provided by the utility model;

FIG. 9 is a schematic view of the cross section and the internal structure of the novel bowl-shaped woven net rack provided by the utility model;

fig. 10 is a schematic structural diagram of a novel microcatheter in-engraving stent in a semi-released state.

Reference numerals:

1. the device comprises a woven net rack, 11, a limiting part, 2, a carving support, 3, a connecting point, 4, an aneurysm, 5 and a microcatheter.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

One embodiment of the novel bifurcated aneurysm occlusion system shown in fig. 1-10 is primarily for bifurcated aneurysms and is formed by combining a braided mesh frame 1 and a sculpted stent 2.

The woven mesh 1 is self-expanding, adapted to occlude the aneurysm 4 after release, and adapts to the morphology of the aneurysm 4.

The sculpted stent 2 is connected to the braided mesh frame 1 and is self-expanding and adapted to cling to the bifurcated vessel wall below the aneurysm after release.

Above-mentioned novel bifurcation aneurysm shutoff system can effectively shutoff tumour neck position, and inside direct release tight net of aneurysm shutoff, and laminating with tumour neck department avoids the recurrence of tumour neck department. In addition, the carving support 2 is supported and arranged inside the blood vessel wall, so that the space occupying effect is reduced, and the influence on other branch blood vessels of the bifurcation is reduced. Firstly, supporting the aneurysm after plugging, so as to avoid the stenosing of the aneurysm-carrying artery after plugging; secondly, the blockage of the branch blood vessel caused by the occupation of the branch blood vessel is avoided. The size of the single carving support 2 can adapt to various focus conditions, the blocking and the supporting are integrated, and meanwhile, the release is carried out, so that the safety in operation is ensured, the risk of delayed rupture of the aneurysm can be reduced, and other branches are prevented from being blocked.

As a specific implementation mode, the shape of the woven net frame is hemispherical or spherical or ellipsoidal or bowl-shaped, and the shape can be used for plugging aneurysms and neck openings.

As a further improved embodiment, the woven mesh frame 1 is a biocompatible mesh frame. The woven net frame 1 is woven by suitable biocompatible alloys including cobalt chromium, stainless steel, nickel titanium, platinum, iridium, tantalum, titanium and the like, other suitable biocompatible materials and/or combinations thereof, and meanwhile, the materials of cobalt chromium, platinum, iridium, tantalum and the like have X-ray impermeability, have certain developability under X-rays, and are easier to observe during operation.

As a further improved embodiment, as shown in fig. 8, the woven net frame 1 is provided with a limiting part 11, and the limiting part 11 can prevent the engraved stent 2 from entering the aneurysm. The limiting part 11 is positioned at the joint of the woven net frame 1 and the engraving support 2, and the maximum outer diameter of the limiting part 11 is larger than the maximum outer diameter of the woven net frame 1. When the woven net frame 1 enters the aneurysm, the limiting part 11 is positioned at the outer side of the aneurysm, and the limiting part 11 is attached to the vessel wall.

As a specific embodiment, the engraving support 2 is formed by fixing a plurality of pipelines in a staggered manner, and each pipeline is staggered to form a plurality of cells.

As a further improved embodiment, the cell gradual change design of the engraving support 2 is changed from the middle section to the two ends from small to large. On the premise of ensuring the supporting force, the effect of the implantation on the occupation of the branch blood vessel is avoided by using lower metal coverage rate, so that the blockage of the branch blood vessel is avoided.

As a further improved embodiment, both ends of the engraving support 2 are provided in a horn mouth shape, thereby enhancing the adherence performance of the product.

As a further improved embodiment, the engraved stent 2 is a biodegradable stent. The engraved stent may be made of magnesium alloy, polylactic acid, polycarbonate polymer, salicylic acid polymer and/or combinations thereof. In other words, any biocompatible but also biodegradable material that can be manufactured in such a way that the radial force is strong enough to be implanted and supported to stabilize the condition of the lesion and vessel retraction.

As a specific embodiment, a plurality of connection points 3 are arranged between the woven net frame 1 and the engraving support 2, and the woven net frame 1 and the engraving support 2 can be combined by welding, weaving, hanging and buckling, embedding with a support developing ring and the like, so that the woven net frame 1 and the engraving support 2 are integrated.

As a further improved embodiment, the engraved stent 2 is a biocompatible stent. The engraved stent is made from a single piece (or multiple pieces) of metal or tube using laser cutting to contain cobalt chromium, stainless steel, nickel titanium, platinum, iridium, tantalum, titanium, and other suitable biocompatible alloys, other suitable biocompatible materials, and/or combinations thereof.

As a further improved embodiment, the engraved stent 2 is embedded with a suitable biocompatible alloy such as platinum, iridium, tantalum and the like on the surface of the stent by welding, pressing and holding and the like, so that the developing property of the stent implanted in a body is further enhanced.

The application method of the utility model comprises the following steps:

the woven mesh frame 1 and the engraving support 2 are preloaded in the introducing sheath. When the device is used, firstly, the microcatheter 5 is placed in the aneurysm at the bifurcation part, then the woven net rack 1 is pushed into the aneurysm at the bifurcation part through the microcatheter 5, as shown in a half-release diagram of the engraved stent in fig. 10, the front woven net rack 1 is released preferentially and is attached to the neck of the aneurysm, recovery and release can be carried out when the position is improper, after the woven net rack 1 is released, the engraved stent 2 connected with the woven net rack is released slowly, so that the engraved stent 2 is placed in the bifurcation vessel below the aneurysm, and the engraved stent 2 is self-expanded and is clung to the vessel wall.

The woven net frame 1 is used for intratumoral occlusion after being released, can adapt to the shape of an aneurysm, is well attached to the aneurysm, and can disturb the blood flow in the aneurysm and cause the aneurysm to plug without coil embolism. Meanwhile, the carving support 2 combined with the carving support is attached to the opposite vascular wall by means of stable radial supporting force, so that the woven net frame 1 can be better supported, and the woven net frame 1 is prevented from shifting or falling into the aneurysm-carrying artery.

When the product is selected, the woven net frame 1 can be protruded at the position of the aneurysm neck, and the position of the aneurysm neck is well plugged by utilizing the wrapping property of the woven net frame 1, so that the subsequent recurrence of the neck opening of the aneurysm is avoided.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims (8)

1. Novel bifurcated aneurysm occlusion system, comprising:

the woven net rack (1) has self-expansibility, is suitable for plugging the aneurysm after release and is self-adaptive to the shape of the aneurysm;

a sculptured stent (2) connected to said braided mesh frame (1) and having a self-expansibility suitable to adhere, after release, to the bifurcation vessel wall below the aneurysm;

the braiding net frame (1) is provided with a limiting part (11) which can prevent the carving support (2) from entering an aneurysm.

2. The novel bifurcated aneurysm occlusion system of claim 1, wherein said braided mesh frame is hemispherical or spherical or ellipsoidal or bowl-shaped.

3. The novel bifurcated aneurysm occlusion system of claim 1 or 2, wherein said braided mesh frame (1) is a biocompatible mesh frame.

4. The novel bifurcated aneurysm plugging system according to claim 1, wherein the engraved stent (2) is formed by interlacing a plurality of lines, each line interlacing to form a plurality of cells.

5. The novel bifurcated aneurysm plugging system of claim 4, wherein the cells of the sculptured stent (2) are enlarged from the middle section to the two ends.

6. The novel bifurcated aneurysm plugging system according to claim 4, wherein both ends of the sculpted stent (2) are provided in a horn mouth shape.

7. The novel bifurcated aneurysm occlusion system of claim 1 or 4, wherein said sculpted stent (2) is a biodegradable stent.

8. The novel bifurcated aneurysm occlusion system of claim 1 or 4, wherein said sculpted stent (2) is a biocompatible stent.