CN219439286U - Aneurysm embolism device and system - Google Patents

Abstract

The utility model relates to an aneurysm embolism device, which is characterized in that a plurality of braiding wires are crossly braided to form the aneurysm embolism device with elasticity, and the aneurysm embolism device comprises a distal end plugging part, a proximal end plugging part and a connecting part connected between the distal end plugging part and the proximal end plugging part; the connecting part is cylindrical, and the distal end blocking part and the proximal end blocking part are hemispherical shells with openings facing away from each other; the aneurysm embolization device is configured when released in the tumor cavity for the distal end shutoff portion and proximal end shutoff portion are crooked in opposite directions, distal end shutoff portion is laminated with the top inner wall of the tumor, proximal end shutoff portion is laminated with the neck of the tumor to realize the jam to the aneurysm. The utility model also claims an aneurysm embolization system. Compared with the form of continuously pushing a spring ring in the prior art, the aneurysm embolism device adopts a physical release mode, shortens the operation time and is more economical.

Description

Aneurysm embolism device and system

Technical Field

The utility model relates to the technical field of medical appliances, in particular to an aneurysm embolism device and system.

Background

Intracranial aneurysms are abnormal expansions of arterial blood vessels due to congenital anomalies or acquired injuries, resulting in hypofunction of the blood vessel walls, and are the main causative agents of subarachnoid hemorrhage.

At present, an open clamp operation and intravascular interventional treatment are mostly adopted for arterial rumen, the open clamp operation needs to open the cranium of a human body, and the open clamp operation has larger damage to the body and long recovery period; the intravascular interventional therapy mainly comprises various spring coil embolic aneurysms, and a bracket assists a spring and blood flow guide to realize treatment;

however, the inventor finds that when the scheme is implemented, the number of the coils is more only by using the coil embolization technology, the coils are expensive, the operation cost is high, and the existing coils are basically led in and detached from the implant by using an electrolysis mode, so that the more the implanted coils are, the longer the time is consumed.

Disclosure of Invention

The utility model provides an aneurysm embolism device and system, which are used for solving the technical problems of high price and long time consumption of an operation by adopting a spring ring in the prior art.

The utility model discloses an aneurysm embolism device, which is formed by intersecting weaving of a plurality of weaving wires, and comprises a distal end plugging part, a proximal end plugging part and a connecting part connected between the distal end plugging part and the proximal end plugging part;

the connecting part is cylindrical, and the distal end blocking part and the proximal end blocking part are hemispherical shells with openings facing away from each other;

the device is elastic as a whole and is configured to bend in opposite directions when released in the lumen of the aneurysm, with the distal occlusion conforming to the inner wall of the tumor roof and the proximal occlusion conforming to the neck of the aneurysm to effect occlusion of the aneurysm.

Further, the distal end blocking portion and the proximal end blocking portion are symmetrically arranged, and the connecting portion is connected with the vertexes of the distal end blocking portion and the proximal end blocking portion.

Further, the braided wires are nickel-titanium alloy wires, and the wire diameter of the braided wires is 0.02 mm-0.06 mm.

Further, the coverage rate of the near-end plugging part to the tumor neck opening reaches 70-75%.

Further, the device is also provided with a developing mark.

Further, the developing mark is developing yarn, the inner diameter of the developing yarn is 0.15-0.30 mm, the outer diameter of the developing yarn is 0.45-0.5 mm, and the length of the developing yarn is 0.3-0.5 mm.

Further, the developing mark is arranged in the dome of the distal end blocking part and the dome of the proximal end blocking part and is fixed in a concave form.

The utility model also discloses an intratumoral embolism system, which comprises the aneurysm embolism device, an introducing sheath, a pushing guide wire and a silicone tube;

the aneurysm embolism device is pre-installed in the introducing sheath in a compressed state and can be arranged in a relatively sliding way along the inner wall of the introducing sheath under the action of external force;

the silicone tube is connected with one end of the pushing guide wire, is plugged into the guide sheath, is contacted with the aneurysm embolism device and is extruded on the inner wall of the guide sheath, and when the silicone tube is pushed, the aneurysm embolism device is driven to move together;

the pushing guide wire part stretches into the guiding sheath and is used for pushing the silica gel tube to move.

Further, the pushing guide wire is made of nickel-titanium alloy, cobalt-chromium alloy or platinum-chromium alloy, and the length of the pushing guide wire is 1800-2000 mm.

Further, the material of the introducing sheath is HDPE or POM.

The aneurysm embolism device provided by the utility model can realize the following technical effects:

1. according to the aneurysm embolism device disclosed by the utility model, the distal end plugging part, the proximal end plugging part and the connecting part for connecting the distal end plugging part and the proximal end plugging part can realize disposable plugging of a tumor cavity, and compared with the form of continuously pushing a spring ring in the prior art, the aneurysm embolism device greatly shortens the operation time and relieves the pain of a patient; in addition, the aneurysm embolism device is formed by weaving the weaving wires, and is more economical compared with a spring ring.

2. According to the intratumoral embolic system disclosed by the utility model, the silicone tube and the aneurysm embolic device are compressed in the introducing sheath, the aneurysm embolic device is pushed into the tumor cavity by pushing the pushing guide wire, and the mechanical release is convenient after the aneurysm embolic device is pushed into the tumor cavity due to elasticity, so that the convenience of implantation of an implant is improved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the utility model.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which:

FIG. 1 is a schematic view of one embodiment of an aneurysm embolization device of the present utility model;

FIG. 2 is a schematic illustration of the placement of an aneurysm embolization device of the present utility model into a bifurcation aneurysm;

FIG. 3 is a schematic illustration of the placement of an aneurysm embolization device of the present utility model into a cystic aneurysm;

fig. 4 is a schematic diagram of the structure of an aneurysm embolization system of the utility model.

Reference numerals: 1. an aneurysm embolization device; 11. a distal occlusion; 12. a proximal occlusion; 13. a connection part; 2. an introducer sheath; 3. pushing the guide wire; 4. a silicone tube.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, and "plurality" means two or more.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

As shown in fig. 1, the present utility model discloses an aneurysm embolic device 1, a plurality of braided wires are cross-braided to form the aneurysm embolic device 1, comprising a distal occlusion part 11, a proximal occlusion part 12 and a connecting part 13 connected therebetween;

the connecting part 13 is cylindrical, and the distal end blocking part 11 and the proximal end blocking part 12 are hemispherical shells with openings facing away from each other; in the embodiment of the present utility model, the diameter of the connecting portion 13 is far smaller than the maximum diameters of the distal end blocking portion 11 and the proximal end blocking portion 12, and the length is larger than the diameters of the distal end blocking portion 11 and the proximal end blocking portion 12, and when the present utility model is specifically set, the length of the connecting portion 13 is adaptively adjusted according to the size of the tumor cavity.

The device is elastic as a whole and is configured to bend in opposite directions when released in the lumen of an aneurysm, distal and proximal occlusion portions 11, 12, the distal occlusion portion 11 being in engagement with the inner wall of the top of the aneurysm and the proximal occlusion portion 12 being in engagement with the neck of the aneurysm to effect occlusion of the aneurysm. Due to the elasticity, the device is automatically released after being placed in the tumor cavity under the action of the elasticity, and is then constrained by the inner wall of the tumor cavity to deform and form a shape fitting the inner wall of the tumor cavity; through the shape setting, the device deforms again after being released, the fit with the inner wall of the tumor cavity can be improved, and the situation that the device cannot be plugged due to the fact that the device is not released and unfolded in place can be avoided.

In the embodiment, the distal end blocking part 11, the proximal end blocking part 12 and the connecting part 13 for connecting the two parts can realize disposable blocking of the tumor cavity, and compared with the form of continuously pushing a spring ring in the prior art, the surgical time is greatly shortened, and the pain of a patient is relieved; the aneurysm embolization device 1 of the present utility model is formed by braiding wires, and is more economical than a spring coil.

On the basis of the above embodiment, optionally, the distal blocking portion 11 and the proximal blocking portion 12 are symmetrically disposed, and the connecting portion 13 is connected to the apexes of the distal blocking portion 11 and the proximal blocking portion 12. Through the arrangement of the symmetrical form, the device is convenient to process on one hand, and on the other hand, the convenience of placing the device into the tumor cavity is improved, and the direction is not required to be adjusted. In embodiments of the utility model, the proximal occlusion is configured to have a coverage of 70% -75% of the tumor neck.

In the embodiment of the utility model, the device is integrally woven and formed during specific processing and manufacturing. For example, the automatic braiding can be performed by adopting a tool with a corresponding shape, and in specific braiding, in some embodiments of the utility model, the braiding wires are nickel-titanium alloy wires, and the wire diameter of the braiding wires is 0.02 mm-0.06 mm. It should be noted here that the nitinol wires have a shape memory effect, and at body temperature, the braided wires will automatically expand into an initial braided shape, and then, due to their hollow structure, will eventually form a final shape as shown in fig. 2 or 3 under the force of the lumen wall of the tumor.

Optionally, in an embodiment of the present utility model, the device further has a developing logo 14 thereon. The developing mark can be a developing wire, and can be used for conveniently observing the specific position of the aneurysm embolism device 1 in the operation process due to the developing effect, so that the effectiveness and the safety of the operation are ensured. Specifically, in some embodiments of the present utility model, the developing filament has an inner diameter of 0.15 to 0.30mm, an outer diameter of 0.45 to 0.5mm, and a length of 0.3 to 0.5mm. In the embodiment of the present utility model, the developing mark 14 is provided in the dome of the distal blocking portion 11 and the proximal blocking portion 12, and is fixed in a concave form. In addition, it should be noted here that the developing wire may also be provided on the delivery guidewire as shown in fig. 4. In the specific installation of the developing mark, the developing mark can be in the form of gluing or welding, as shown in fig. 1 to 3, and the damage of the developing mark 14 to the inner wall of the tumor cavity can be reduced by the recessed installation, so that the safety of the operation is improved.

In another aspect of the embodiments of the present utility model, there is also provided an aneurysm embolization system as shown in fig. 4, comprising the above-described aneurysm embolization device 1, an introducer sheath 2, a pusher guidewire 3 and a silicone tube 4;

the aneurysm embolism device 1 is pre-installed in the guide sheath 2 in a compressed state and can be arranged in a relatively sliding way along the inner wall of the guide sheath 2 under the action of external force;

the silicone tube 4 is connected with one end of the pushing guide wire 3, is plugged into the guide sheath 2, is contacted with the aneurysm embolism device 1 and is extruded on the inner wall of the guide sheath 2, and when the silicone tube 4 is pushed, the aneurysm embolism device 1 is driven to move together;

the pushing guide wire 3 extends into the guiding sheath 2 to push the silicone tube 4 to move. In the embodiment of the utility model, the aneurysm embolism device 1 is matched with the silicone tube 4 and the introducing sheath 2 for use, and pushing pushes the aneurysm embolism device 1 and the silicone tube 4 to synchronously move on the inner wall of the introducing sheath 2 through friction force. As shown in fig. 4, the silicone tube 4 is sleeved on the push-in guide wire 3, then the aneurysm embolism device 1 is compressed and partially wrapped by the connecting part 13 in the middle of the silicone tube, and the silicone tube 4 is plugged into the guide sheath 2 together, and in the embodiment of the utility model, the end part of the push-in guide wire 3 is also provided with a sphere with the diameter slightly larger than the inner diameter of the silicone tube 4, so that the silicone tube 4 is pulled out of the guide sheath 2 together later, and the front end is spherical, thereby being beneficial to reducing the damage to a tumor cavity.

In some embodiments of the utility model, the pushing wire 3 is nickel-titanium alloy, cobalt-chromium alloy or platinum-chromium alloy, and has a length of 1800 mm-2000 mm. The material of the introducing sheath 2 is HDPE or POM. Here, HDPE refers to high density polyethylene material, and POM refers to acetal resin. Regarding the specific dimensions of the device, in some embodiments of the utility model, the outer diameter of the introducer sheath 2 is 0.7-0.9 mm, the inner diameter is adjusted according to the size of the aneurysm embolization device 1, the wire diameter of the push wire 3 is 0.38-0.55 mm, the inner diameter of the silicone tube 4 is 0.15-0.3 mm, the outer diameter is 0.45-0.60 mm, and the length is 2-5 mm.

Application scenario of an exemplary embodiment:

in the implementation, firstly, the pushing guide wire 3 is connected with the silicone tube 4, then the silicone tube 4 and the aneurysm embolism device 1 are compressed and plugged into the introducing sheath 2 together to finish preparation, then the introducing sheath 2 is punctured at the femoral artery of a human body, the introducing sheath 2 enters the neck of the aneurysm along the artery, the port of the introducing sheath 2 stretches into the lumen of the aneurysm, then the introducing sheath 2 is fixed, the pushing guide wire 3 starts to be pushed towards the direction of the lumen of the aneurysm, the silicone tube 4 moves towards the lumen of the aneurysm along with the inner wall of the introducing sheath 2 together with the aneurysm embolism device 1, the specific position and the orientation of the aneurysm embolism device 1 are observed by utilizing the developing mark 14 while moving, when the aneurysm embolism device 1 reaches the port of the introducing sheath 2, the distal end plugging part 11 of the aneurysm embolism device 1 is released firstly, and is attached to the top of the aneurysm, then the proximal end part 12 is released continuously and the pushing guide wire 3 is pushed back in the releasing process, the silicone tube 4 is separated from the aneurysm device 1 along the direction of the lumen of the aneurysm, finally, the aneurysm embolism device 1 is placed along with the direction of the lumen of the aneurysm, and the aneurysm embolism device 1 is pulled out, and the operation is completed.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. An aneurysm embolization device, characterized in that a plurality of braiding wires are crossly braided to form the aneurysm embolization device with elasticity, the aneurysm embolization device comprises a distal end blocking part, a proximal end blocking part and a connecting part connected between the distal end blocking part and the proximal end blocking part;

the connecting part is cylindrical, and the distal end blocking part and the proximal end blocking part are hemispherical shells with openings facing away from each other;

the aneurysm embolization device is configured when released in the tumor cavity for the distal end shutoff portion and proximal end shutoff portion are crooked in opposite directions, distal end shutoff portion is laminated with the top inner wall of the tumor, proximal end shutoff portion is laminated with the neck of the tumor to realize the jam to the aneurysm.

2. The aneurysm embolization device of claim 1 wherein the distal and proximal occlusion portions are symmetrically disposed, and the connecting portion is connected to the apices of the distal and proximal occlusion portions.

3. The aneurysm embolization device of claim 2 wherein the braided wire is a nickel titanium alloy wire having a wire diameter of 0.02mm to 0.06mm.

4. An aneurysm embolization device according to claim 3 wherein the coverage of the neck opening by the proximal occlusion is up to 70% to 75%.

5. The aneurysm embolization device of claim 1 further comprising a visualization marker thereon.

6. The aneurysm embolization device of claim 5 wherein the visualization marker is a visualization wire having an inner diameter of 0.15 to 0.30mm, an outer diameter of 0.45 to 0.5mm, and a length of 0.3 to 0.5mm.

7. The aneurysm embolization device of claim 5 wherein the visualization marker is disposed within the dome of the distal and proximal occlusion and is affixed in a recessed fashion.

8. An aneurysm embolization system comprising the aneurysm embolization device of any one of claims 1-7, an introducer sheath, a pusher wire, and a silicone tube;

the aneurysm embolism device is preloaded in the guide sheath in a compressed state and can be arranged in a relatively sliding manner along the inner wall of the guide sheath under the action of external force;

the silicone tube is connected with one end of the pushing guide wire, is plugged into the guide sheath, is contacted with the aneurysm embolism device and is extruded on the inner wall of the guide sheath, and when being pushed, the silicone tube drives the aneurysm embolism device to move together;

the pushing guide wire part extends into the guide sheath and is used for pushing the silicone tube to move.

9. The aneurysm embolization system of claim 8 wherein the push guidewire is nickel titanium alloy, cobalt chromium alloy or platinum chromium alloy, having a length of 1800mm to 2000mm.

10. The aneurysm embolization system of claim 8, wherein the material of the introducer sheath is HDPE or POM.