CN216535404U - A vascular occlusion device and vascular occlusion system - Google Patents

Abstract

The utility model relates to a vascular occlusion device and a vascular occlusion system, wherein the vascular occlusion device comprises a metal support, the metal support is composed of a near-end side wall, a far-end side wall and a circumferential side wall connected between the near-end side wall and the far-end side wall, meshes for allowing blood to pass through are arranged on the near-end side wall and the far-end side wall, the inner diameter of each mesh is 0.8-1 mm, the metal coverage rate of the near-end side wall and the far-end side wall is 17-23%, and a guide wire connecting structure for being disconnected with a conveying guide wire is arranged on the near-end side wall. The utility model solves the technical problem that the blood vessel is quickly blocked and acute thrombotic complications are easily generated at the near end in the prior art.

Description

A vascular occlusion device and vascular occlusion system

technical field

The utility model relates to a vascular occlusion device and a vascular occlusion system for slowly occluding blood vessels.

Background technique

Cerebral arterial hemangioma refers to intracranial aneurysm, which is a common cerebrovascular disease with an insidious course and sudden onset. , is one of the most dangerous cerebrovascular diseases.

Intracranial aneurysm is a tumor-like protrusion of the arterial wall caused by the localized abnormal expansion of the lumen of the intracranial artery. It is a common clinical vascular disease and the most common cause of spontaneous subarachnoid hemorrhage. In the treatment of cerebrovascular diseases, it is often necessary to permanently block or temporarily block the corresponding blood supply arteries in the brain for a long time. In the prior art, the blood vessels are occluded by coils, balloons or embolization techniques. If it is too fast, it is easy to produce acute thrombotic complications at the proximal end, and it is also prone to cerebral ischemia complications due to rapid occlusion of intracranial arteries; at the same time, it is impossible to predict and control the length of thrombus occlusion, resulting in perforator involvement and occlusion.

SUMMARY OF THE INVENTION

The purpose of the present utility model is to provide a vascular occlusion device to solve the technical problem of rapid occlusion of blood vessels in the prior art and acute thrombosis complications at the proximal end; the purpose of the utility model is also to provide a vascular occlusion device using the Device for vaso-occlusive system.

In order to solve the above-mentioned technical problems, the technical scheme of the vascular occlusion device in the present invention is as follows:

A vascular occlusion device, comprising a metal stent, the metal stent is composed of a proximal side wall, a distal side wall and a circumferential side wall connected between the proximal side wall and the distal side wall, the proximal side wall and the distal side wall are There is a mesh hole for blood to pass through on the side wall, the inner diameter of the mesh hole is 0.8mm~1mm, the metal coverage rate of the proximal side wall and the distal side wall is 17%~23%, and the proximal side wall is provided with useful A guide wire connection structure that can be disconnected from the delivery guide wire.

The guide wire connection structure is a threaded connection structure or a fused neck structure.

The extended length of the metal stent in the blood vessel is 0.5cm~2cm.

The vascular occlusion device further includes a delivery guide wire, and the distal end of the delivery guide wire is connected to the guide wire connecting structure.

The mesh density of the proximal side wall and the distal side wall is 1.2 to 1.5 mesh per square millimeter.

The technical scheme of the vascular occlusion system in the utility model is as follows:

Vascular occlusion system, including a delivery catheter, the vascular occlusion system also includes a vascular occlusion device, the vascular occlusion device includes a metal stent for delivering along the delivery catheter to the lesion site, the metal stent is composed of a proximal side wall, a distal side wall and is connected to the proximal side wall. The circumferential sidewall between the end sidewall and the distal sidewall is formed, and the proximal sidewall and the distal sidewall are provided with mesh holes for blood to pass through. The metal coverage rate of the wall and the distal side wall is 17% to 23%. The proximal side wall is provided with a guide wire connection structure for disconnecting from the delivery guide wire. The vascular occlusion device also includes a distal end connected to the guide wire. A structurally connected delivery guide wire.

The guide wire connection structure is a threaded connection structure or a fused neck structure.

The extended length of the metal stent in the blood vessel is 0.5cm~2cm.

The metal stent is woven from nitinol wire.

The mesh hole density of the proximal side wall and the distal side wall is 1.37 mesh holes per square millimeter.

The beneficial effects of the utility model are as follows: when in use, the metal stent is delivered to the blood vessel to be occluded through the delivery guide wire, and then the connection between the delivery guide wire and the metal stent is disconnected, and the metal stent is independently stored in the blood vessel to be occluded, Due to the design of the mesh size and metal coverage on the proximal and distal side walls, blood can pass through the meshes smoothly in the initial stage of the metal stent deployment, and with the passage of time, depending on the proximal and distal side walls, the Intimalization on the sidewall and thrombosis between the proximal sidewall and the distal sidewall make blood no longer pass through the metal stent smoothly. At this time, the metal stent completes the occlusion of the corresponding blood vessel. The long-term course of the vaso-occlusive device is therefore less prone to acute hemorrhagic complications.

Description of drawings

1 is a schematic structural diagram of a vascular occlusion device in an embodiment of the vascular occlusion system of the present invention;

Fig. 2 is the schematic diagram of the cooperation of the vascular occlusion device and the delivery catheter in Fig. 1;

3 is a schematic diagram of the state after the release of the metal stent of the vascular occlusion device in the present invention;

1. Metal stent; 2. Delivery guide wire; 3. Neck structure; 4. Delivery catheter; 5. Aneurysm; 6. Diseased blood vessel; 7. Proximal sidewall; 8. Circumferential sidewall; 9. Distal end side wall.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention are for the purpose of describing specific embodiments only, and are not used to limit the present invention.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Embodiments of the vascular occlusion system in the present invention are shown in Figures 1 to 3: it includes a guiding wire (not shown in the figure), a delivery catheter 4 and a vascular occlusion device. The guiding wire and the delivery catheter belong to the prior art, and here No further details.

The vascular occlusion device includes a metal stent 1, the metal stent 1 is woven from nickel-titanium alloy wires, the metal stent is a hollow structure as a whole, and the metal stent is composed of a proximal side wall 7, a distal side wall 9, and is connected to the proximal side wall 7 and The circumferential side wall 8 between the distal side walls 9 is formed. After the metal stent 1 is deployed in the blood vessel, the overall length of the metal stent from the proximal side wall to the distal side wall is 1.5 cm, which determines the formation of thrombus. length.

The proximal side wall 7 and the distal side wall 9 have mesh holes for blood to pass through. In this embodiment, the inner diameter of the mesh hole is 0.9 mm, and the metal coverage rate of the proximal side wall and the distal side wall is 20%. , the mesh density of the proximal side wall and the distal side wall is 1.37 mesh holes per square millimeter.

The proximal side wall is provided with a guide wire connection structure that can be disconnected from the delivery guide wire 2. In this embodiment, the guide wire connection structure is a necked structure 3 that can be fused, and the resistance at the necked structure is compared with the resistance at other positions. It is larger, so when the power is turned on, the neck structure will heat up and fuse. Disconnectable connection refers to a connection form that can be disconnected under certain conditions or state changes. In other embodiments of the present invention, the guide wire connection structure may also be a threaded connection structure. For example, the guide wire connection structure is a threaded connection structure. The delivery guide wire 2 is threadedly connected with the threaded hole. When the metal stent is released in the blood vessel, the delivery guide wire is rotated, and the delivery guide wire can be disconnected from the guide wire connection structure; in other embodiments of the present invention, The guide wire connecting structure may also be a hooking structure or other connecting structures that can be disconnected under certain conditions or state changes.

When using, first guide the guide wire to reach the lesion location, and then under the guiding and guiding action of the guide wire, the delivery catheter 4 is sent to the lesion location, the guide wire is withdrawn, and the vascular occlusion device is moved along the delivery catheter through the delivery guide wire. When sent to the diseased blood vessel 6, the metal stent of the vascular occlusion device is contracted in the delivery catheter. After reaching the diseased blood vessel, the delivery catheter moves backward, the metal stent is released into the diseased blood vessel, and the metal stent expands and adheres to the vessel wall. In the initial stage of use, blood can smoothly enter the diseased blood vessels through the meshes on the proximal and distal side walls. A thrombus is gradually formed between the proximal side wall and the distal side wall. At this time, the vascular occlusion device acts like a "plug" to block the diseased blood vessel to achieve slow occlusion of the blood vessel and avoid acute thrombotic complications.

Through the design of metal coverage and mesh size, one-time implantation is realized, and the blood vessel is gradually occluded within half a year. At the same time, the new type of thrombus forms between the proximal side wall and the distal side wall, which can control the length and speed of thrombus occlusion , in principle, the shorter the length of thrombus occlusion, the better.

In other embodiments of the present invention, the inner diameters of the mesh holes in the proximal side wall and the distal side wall may also be 0.8 mm, 1 mm, or any other value between 0.8 mm and 1 mm; The metal coverage of the side wall can also be 17%, 23% or any other value between 17% and 23%; the mesh density on the proximal side wall and the distal side wall is 1.2, 1.5 or 1.2~ Any other value between 1.5.

Embodiments of the vascular occlusion device are shown in FIGS. 1 to 3 : the specific structure of the vascular occlusion device is the same as the vascular occlusion device described in the above embodiments of the vascular occlusion system, and will not be described in detail here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit of the technical solutions of the embodiments of the present invention and range.

Claims (10)

1. a vascular occlusion device is characterized in that: comprise a metal support, and the metal support is made up of a proximal side wall, a distal side wall and a circumferential side wall connected between the proximal side wall and the distal side wall, The end side wall and the distal side wall have mesh holes for blood to pass through, the inner diameter of the mesh hole is 0.8mm~1mm, the proximal side wall and the distal side wall are covered with metal, and the proximal side wall is provided with A guidewire connection structure that can be disconnected from the delivery guidewire. 2 . The vascular occlusion device according to claim 1 , wherein the guide wire connection structure is a threaded connection structure or a fused neck structure. 3 . 3 . The vascular occlusion device according to claim 1 , wherein the expanded length of the metal stent in the blood vessel is 0.5 cm to 2 cm. 4 . 4 . The vascular occlusion device according to claim 1 , wherein the vascular occlusion device further comprises a delivery guide wire, and the distal end of the delivery guide wire is connected to the guide wire connecting structure. 5 . 5. The vascular occlusion device according to any one of claims 1 to 4, wherein the mesh density of the proximal side wall and the distal side wall is 1.2 to 1.5 mesh per square millimeter. 6. A vascular occlusion system, including a delivery catheter, characterized in that: the vascular occlusion system also includes a vascular occlusion device, and the vascular occlusion device includes a metal stent for being transported to the lesion along the delivery catheter, and the metal stent consists of a proximal side wall, a distal end wall, and a vascular occlusion device. The side wall is composed of a circumferential side wall connected between the proximal side wall and the distal side wall. The proximal side wall and the distal side wall have mesh holes for blood to pass through, and the inner diameter of the mesh holes is 0.8 mm. ~1mm, the proximal side wall and the distal side wall are covered with metal, the proximal side wall is provided with a guide wire connection structure for disconnecting from the delivery guide wire, and the vascular occlusion device also includes a distal end and a guide wire connection structure Connected delivery guide wire. 7 . The vascular occlusion system according to claim 6 , wherein the guide wire connection structure is a threaded connection structure or a fusible neck structure. 8 . 8 . The vascular occlusion system according to claim 6 , wherein the expanded length of the metal stent in the blood vessel is 0.5 cm to 2 cm. 9 . 9 . The vascular occlusion system according to claim 6 , wherein the metal stent is woven from nickel-titanium alloy wire. 10 . 10. The vascular occlusion system according to any one of claims 6 to 9, wherein the mesh density of the proximal side wall and the distal side wall is 1.37 meshes per square millimeter.

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