CN106539608A - A kind of intravascular stent - Google Patents

Abstract

The invention discloses a vascular stent, which comprises an elastic hollow sphere, the elastic hollow sphere is provided with hollow holes, the elastic hollow sphere can be compressed and elongated to move in the blood vessel, and the elastic hollow sphere can move in the blood vessel. It is expanded into a sphere, so that the outside of the elastic hollow sphere is tightly attached to and fixed on the inner wall of the blood vessel. No matter in which direction it is placed, it will be uniformly spherical after unfolding, so it can be released without deliberate positioning, which facilitates the operation, improves the success rate of the operation, and reduces the operation cost.

Description

a vascular stent

technical field

The invention relates to the field of medical devices, in particular to a blood vessel stent.

Background technique

In many surgical procedures, it is necessary to place vascular stents in the blood vessels to support the corresponding components. For example, the operation for the treatment of basilar artery tip aneurysm is recognized as one of the refractory intracranial aneurysms. The aneurysm is located deep and close to the brain. The trunk and multiple groups of intracranial nerves make it difficult to expose the tumor by surgery, and the treatment risk is high. Interventional treatment such as bifurcation aneurysms in the brain is also difficult. For such bifurcation aneurysms, the traditional treatment is the "Y" stent technology assisted by coil embolization technology, which can protect the parent artery to the greatest extent and at the same time densely pack the aneurysm. The so-called "Y"-shaped stent technology is to first place one stent on a branch to the trunk, and then place another stent through the mesh of the first stent from the other branch to the trunk. The proximal ends of the two stents overlap at the trunk Form a "Y" shape. The "Y"-shaped stent technology can reshape the aneurysm neck, exert mechanical barriers, place coils to protrude into the parent artery, and can reduce the blood flow guide and promote the intima of the aneurysm neck through the stent. The possibility of aneurysm recurrence, but the "Y" type stent technique is complicated to operate, the operation process is complicated, and it is difficult to implement.

Therefore, how to provide a vascular stent that can simplify the operation process is a technical problem that those skilled in the art need to solve.

Contents of the invention

The purpose of the present invention is to provide a vascular stent, which simplifies the operation process, improves the success rate of the operation, and reduces the operation cost.

In order to solve the above technical problems, the present invention provides a vascular stent, which includes an elastic hollow sphere, and hollow holes are arranged on the elastic hollow sphere, and the elastic hollow sphere can be compressed and elongated to move in the blood vessel, and the elastic hollow sphere The hollow sphere can be expanded into a sphere in the blood vessel, so that the outside of the elastic hollow sphere can be tightly attached to and fixed on the inner wall of the blood vessel.

Preferably, the elastic hollow sphere is specifically a woven memory wire mesh sphere.

Preferably, the memory wire mesh-shaped woven ball is specifically a nickel-titanium alloy wire mesh-shaped woven ball.

Preferably, the elastic hollowed sphere is a one-piece hollowed sphere, and the hollowed holes are laser-cut holes.

Preferably, the diameter of the elastic hollow sphere when expanded is 1 mm to 10 mm.

Preferably, it also includes a display indicator mounted on the elastic hollow sphere.

Preferably, the developing indicator is a developing metal wire wound around the elastic hollow sphere.

Preferably, the developing wire has a diameter of 0.01 mm to 0.05 mm.

Preferably, the visible marker is welded to the elastic hollow sphere.

Preferably, there are four said display signs.

The invention provides a vascular stent, comprising an elastic hollow sphere, the elastic hollow sphere is provided with a hollow hole, the elastic hollow sphere can be compressed and elongated to move in the blood vessel, and the elastic hollow sphere can be expanded into a sphere in the blood vessel, so that The outside of the elastic hollow sphere is tightly attached to and fixed on the inner wall of the blood vessel.

During the operation, the elastic hollow sphere is first compressed and elongated, and can move in the blood vessel. When it moves to the preset position, the elastic hollow sphere expands into a sphere, and its outside is close to the inside of the blood vessel, so that it can be fixed at the preset position for follow-up operate. No matter in which direction it is placed, it will be uniformly spherical after unfolding, so it can be released without deliberate positioning, which facilitates the operation, improves the success rate of the operation, and reduces the operation cost.

Description of drawings

Fig. 1 is a schematic structural view of a specific embodiment of a vascular stent provided by the present invention;

2 is a schematic diagram of a specific embodiment of the vascular stent provided by the present invention for basilar artery tip aneurysm;

3 is a schematic diagram of a specific embodiment of a vascular stent provided by the present invention for vascular occlusion;

Fig. 4 is a schematic diagram of another embodiment of the vascular stent provided by the present invention for vascular occlusion.

detailed description

The core of the present invention is to provide a vascular stent, which simplifies the operation process, improves the success rate of the operation, and reduces the operation cost.

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 1 . FIG. 1 is a schematic structural view of a specific embodiment of the vascular stent provided by the present invention.

The vascular stent provided by the specific embodiment of the present invention includes an elastic hollow sphere 1, which is provided with a hollow hole, and the elastic hollow sphere 1 can be compressed and elongated to move in the blood vessel, and the elastic hollow sphere 1 can move in the blood vessel. Expand into a sphere, so that the outside of the elastic hollow sphere 1 is tightly attached to and fixed on the inner wall of the blood vessel. Specifically, according to the inner diameter of the surgical blood vessel, the diameter of the elastic hollow sphere 1 when deployed is 1 mm to 10 mm.

During the operation, the elastic hollow sphere 1 is compressed and elongated at first, and can move in the blood vessel. When it moves to the preset position, the elastic hollow sphere 1 expands into a sphere, and its outside is close to the inside of the blood vessel, so that it is fixed at the preset position, so as to Follow up. No matter in which direction it is placed, it will be uniformly spherical after unfolding, so it can be released without deliberate positioning, which facilitates the operation, improves the success rate of the operation, and reduces the operation cost. At the same time, it can also be in a state of incomplete release in the blood vessel, and is constrained by the blood vessel wall in an oval or other irregular geometric shape, with good wall-grasping properties.

The elastic hollow sphere 1 can be processed in a variety of ways, and can be woven into a sphere through the memory wire through a mesh, that is, a memory wire mesh woven sphere. The mesh is a hollow hole, and the shape of the mesh can be regular or irregular polygons, and the polygons can be arranged evenly or non-uniformly. Specifically, nickel-titanium alloy wire can be used, and other materials can also be used, all of which are within the protection scope of the present invention.

Of course, the elastic hollow sphere 1 can also be provided in one piece, and the hollow hole is specifically a laser cut hole, that is, the hollow sphere is cut with a laser to form a hollow hole.

On the basis of the vascular stents provided in the above-mentioned specific embodiments, in order to facilitate the operation, a developing indicator 2 can also be installed on the elastic hollow sphere 1 . It is also possible not to set the development mark 2, and directly set the inner core of the development material in the nickel-titanium alloy wire.

The development indicator 2 can be a development wire wound around the elastic hollow sphere 1, such as platinum, platinum alloy, tungsten, gold alloy, etc., and the diameter of the development wire is 0.01 mm to 0.05 mm. The developing indicator 2 can also be welded to the elastic hollow sphere 1 . Specifically, four display marks 2 can be set. It is within the scope of protection of the present invention to adjust the quantity and setting method of the display mark 2 according to the situation.

The usage of the vascular stent in the specific embodiment of the present invention in different operations is introduced below. Please refer to FIG. 2 , which is a schematic diagram of a specific embodiment of the vascular stent provided by the present invention for basilar artery tip aneurysm.

At the basilar artery tip 5 or other vascular bifurcations, there is an aneurysm 4, and the elastic hollow sphere 1 is placed on the basilar artery tip 5 through a microcatheter 6. bit. Since the elastic hollow sphere 1 is spherical, and the shape of any part is consistent, no matter where it is placed, the elastic hollow sphere 1 will show a uniform spherical shape after bouncing off, so it can be released without deliberate positioning. After the elastic hollow ball 1 is placed in place, the coil 3 can be filled into the aneurysm 4 through another microcatheter. It is also possible to deliver the microcatheter of the spring coil 3 to the position first, and then release the elastic hollow sphere 2 .

Please refer to Figure 3 and Figure 4, Figure 3 is a schematic diagram of a specific embodiment of the vascular stent provided by the present invention for vascular occlusion; Figure 4 is another specific embodiment of the vascular stent provided by the present invention for vascular occlusion A schematic diagram of an embodiment.

As shown in FIG. 3 , the elastic hollow sphere 1 is first released at the desired position. Since the elastic hollow sphere 1 has compliance, the elastic hollow sphere 1 is tightly attached to the blood vessel wall and is fixed in the blood vessel 7 by the blood vessel wall. Release the coil 8 in the blood vessel 7 at the proximal end of the elastic hollow sphere 1, and the blood flow will rush the coil 8 to the distal end of the blood vessel 7, wherein the blood flow direction is from the proximal end to the distal end, when the coil 8 touches the elastic hollow sphere 1, the elastic hollow ball 1 is fixed in the blood vessel 7 to form an embolism. Alternatively, as shown in FIG. 4 , the spring ring 8 can be released inside the elastic hollow ball 1 , and the spring ring 8 is wrapped by the elastic hollow ball 1 and fixed in the blood vessel 7 to form an embolism. Of course, it can also be applied to other operations, all within the protection scope of the present invention.

The vascular stent provided by the present invention has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. a kind of intravascular stent, it is characterised in that including elastic hollow out spheroid (1), be provided with the elastic hollow out spheroid (1) Hollow hole, the elastic hollow out spheroid (1) can be elongated to move by compression in intravascular, and the elastic hollow out spheroid (1) Spheroid can be launched in intravascular, make to be adjacent to and be fixed on blood vessel outside the elastic hollow out spheroid (1).

2. intravascular stent according to claim 1, it is characterised in that the elastic hollow out spheroid (1) specially remembers gold Category mesh-like braiding spheroid.

3. intravascular stent according to claim 2, it is characterised in that the memory metal mesh-like woven ball body is specially The netted woven ball body of nitinol alloy wire.

4. intravascular stent according to claim 1, it is characterised in that the elastic hollow out spheroid (1) is specially integral type Hollow out spheroid, the hollow hole are specially laser cut hole.

5. intravascular stent according to claim 1, it is characterised in that diameter when the elastic hollow out spheroid (1) is launched For 1 millimeter to 10 millimeters.

6. the intravascular stent according to claim 1 to 5 any one, it is characterised in that also including being installed on the elasticity The development indicating (2) of hollow out spheroid (1).

7. intravascular stent according to claim 6, it is characterised in that the development indicating (2) be specially be wound in it is described The development wire of elastic hollow out spheroid (1).

8. intravascular stent according to claim 7, it is characterised in that the development it is wiry a diameter of 0.01 millimeter extremely 0.05 millimeter.

9. intravascular stent according to claim 6, it is characterised in that the development indicating (2) is welded in the elasticity and engraves Empty spheroid (1).

10. intravascular stent according to claim 6, it is characterised in that including four developments indicatings (2).