CN217611585U - Variable-diameter dense-net support - Google Patents

Abstract

The utility model provides a dense net support of reducing, dense net support of reducing includes two at least first parts and connects the second part between two adjacent first parts, and the first part is hollow straight tube shape, and the second part is hollow taper shape, communicates each other between adjacent first part and the second part, and the diameter of the first part that is close to the support distal end of the dense net of reducing is less than the diameter of the first part far away from the support distal end of the dense net of reducing. The variable-diameter dense-net support has the advantages that: can adapt to the characteristics of thin far end and thick near end of the blood vessel, make the better laminating blood vessel of support, avoid the support to avoid exerting too big holding power and the blood vessel inner wall damage that causes to the thinner vascular wall of diameter when thick intravascular movement.

Description

Variable-diameter dense-net support

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to a dense net support of reducing.

Background

The current latest interventional therapy apparatus for human intracranial vascular aneurysm is a dense mesh stent, a small-diameter high PPI braided stent is formed by mixing and braiding superfine cobalt-cadmium-nickel alloy wires, platinum-tungsten alloy wires, nickel-titanium wires, platinum-iridium wires and the like, and an interception barrier is formed at the neck of the aneurysm in a blood vessel through high surface tension seen by a stent mesh, so that the speed of blood flowing into the aneurysm is reduced, the flow is reduced, the direction of the blood flow is changed, the blood flows along the lumen of the dense mesh stent, the blood in the aneurysm is solidified and polarized, finally, an embolism group is shaped, and the surface of the dense mesh stent is endothelialized, and the effect of blood vessel reconstruction is realized.

The diameters of dense mesh stents (or called blood flow guiding devices) on the market at present are all equal-diameter, and a few stents are open at two ends and have equal diameter in the middle. In fact, intracranial vessels are all of unequal diameter, usually thin at the distal end and thick at the proximal end, and if the span of the aneurysm is large, the stent may have a diameter difference of more than 1mm at the proximal and distal ends of the vessel it is desired to cover. In this case, if the diameter of the stent is constant, the radial support force for the proximal and distal ends of the vessel is different. For a blood vessel with a smaller diameter, if the selected stent has an excessively large diameter, the blood vessel is always in a stress supporting state, and the inner wall of the blood vessel can be damaged when the blood vessel wall bears a larger supporting force for a long time; for a blood vessel with a larger diameter, if the diameter of the selected stent is too small, the stent may adhere to the wall, and under the action of blood flow impact and pulsation of the blood vessel, the stent may move, or the stent cannot completely cover the neck opening of the tumor, or the stent does not adhere to the wall in the blood vessel to form a sandwich layer, so that thrombus is caused.

To address this problem, clinicians combine a longer stent in a nested fashion with multiple stents of different diameters. This procedure increases the time of the operation and also puts a heavy burden on the patient.

In view of the foregoing, it would be desirable to provide a variable diameter dense mesh stent that overcomes the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a dense net support of reducing aims at solving the problem that prior art exists, the utility model discloses a purpose can realize through following technical scheme.

An embodiment of the utility model provides a dense net support of reducing, the dense net support of reducing includes two at least first parts and connects the second part between two adjacent first parts, and the first part is hollow straight tube shape, and the second part is hollow conical, communicates each other between adjacent first part and the second part, and the diameter of the first part that is close to the support distal end of the dense net support of reducing is less than the diameter of the first part far away from the support distal end of the dense net support of reducing.

According to the utility model discloses a diameter of the close net support of above-mentioned an embodiment provides, wherein the diameter R2 of the near-end of the close net support of reducing is greater than the diameter R1 of the far end of the close net support of reducing, and the difference more than or equal to 1 nanometer and be less than 4 nanometers is netted to the diameter R2 of the near-end of the close net support of reducing and the diameter R1 of the far end of the close net support of reducing.

According to the present invention, there is provided a variable diameter dense mesh stent, wherein the diameter of the distal end of the second member is the same as the diameter of the first member connected to the distal end of the second member, the diameter of the proximal end of the second member is the same as the diameter of the first member connected to the proximal end of the second member, and the cross section of the second member is changed from the minimum diameter to the maximum diameter along the direction from the distal end to the proximal end.

According to the utility model discloses an above-mentioned dense net support of reducing that an embodiment provided, wherein the dense net support of reducing is woven silk for metal material or non-metal material and is woven the silk and weave and form, or metal material weaves silk and non-metal material and weaves the silk and weave the mixture and form.

According to the utility model discloses an above-mentioned one embodiment of reducing dense net support that provides, wherein metal material is the wire of memory alloy material, including cobalt chromium nickel alloy, platinum core nickel titanium alloy, platinum tungsten alloy, nickel titanium alloy.

According to the utility model discloses an above-mentioned one embodiment provides the dense net support of reducing, wherein non-metallic material includes in poly (p-dioxanone), levorotatory polylactic acid, polycaprolactone.

According to the utility model discloses embodiment's close net support of reducing's advantage lies in: the characteristics of thin far end and thick near end of the blood vessel can be adapted, so that the stent is better attached to the blood vessel, and the damage to the inner wall of the blood vessel caused by applying excessive supporting force to the blood vessel wall with thin diameter is avoided while the stent moves in the thick blood vessel; the clinician does not need to adopt the mode of nesting a plurality of brackets with different diameters to combine a longer bracket operation mode, thereby reducing the operation time and lightening the operation burden of the patient.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings.

Fig. 1 shows a schematic view of a variable diameter dense mesh stent according to an embodiment of the present invention.

Reference numerals and part names: the method comprises the following steps of A, the far end of a variable-diameter dense mesh support, B, the near end of the variable-diameter dense mesh support, R1, the far end diameter of the variable-diameter dense mesh support, R2, the near end diameter of the variable-diameter dense mesh support, 1, a first part and 2, a second part.

Detailed Description

The following description of the embodiments of the present application with reference to the drawings and examples will make it easy for those skilled in the art to understand the technical problems and technical solutions solved by the present application and the technical effects thereof through the contents described in the present specification. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. In addition, for convenience of description, only the portions related to the related utility model are shown in the drawings.

It should be noted that the structures, proportions, and sizes shown in the drawings and described in the specification are only used for understanding and reading the contents described in the specification, and are not used for limiting the conditions under which the present application can be implemented, so that the present invention is not technically substantial, and any modifications of the structures, changes of the proportion relationships, or adjustments of the sizes, should still fall within the scope of the technical contents disclosed in the present application without affecting the functions and purposes which can be achieved by the present application.

Reference to words such as "first," "second," "the," and the like do not denote a limitation of quantity, and may refer to the singular or the plural. The present application is directed to the terms "comprising," "including," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Fig. 1 shows a schematic view of a variable diameter dense mesh stent according to an embodiment of the present invention. As shown in fig. 1, the reducing dense net support comprises at least two first components 1 and a second component 2 connected between the two adjacent first components 1, the first components 1 are hollow straight cylinder-shaped, the second components 2 are hollow conical, the adjacent first components 1 and the second components 2 are communicated with each other, and the diameter of the first component 1 close to the far end a of the reducing dense net support is smaller than that of the first component 1 far from the far end a of the reducing dense net support.

According to the utility model discloses a diameter of the close net support of above-mentioned an embodiment provides, wherein diameter R2 of the close end B of the close net support of reducing is greater than the diameter R1 of the close net support of reducing distal end A, and the difference between diameter R2 of the close end B of the close net support of reducing and the diameter R1 of the close net support of reducing is more than or equal to 1 nanometer and is less than 4 nanometers, and R2-R1 is more than or equal to 1nm promptly and is less than 4nm.

According to the present invention, there is provided a variable diameter dense mesh stent, wherein the diameter of the distal end of the second member 2 is the same as the diameter of the first member 1 connected to the distal end of the second member 2, the diameter of the proximal end of the second member 2 is the same as the diameter of the first member 1 connected to the proximal end of the second member 2, and the cross section of the second member 2 is changed from the minimum diameter to the maximum diameter along the direction from the distal end to the proximal end.

According to the utility model discloses an above-mentioned dense net support of reducing that an embodiment provided, wherein the dense net support of reducing is woven silk for metal material or non-metal material and is woven the silk and weave and form, or metal material weaves silk and non-metal material and weaves the silk and weave the mixture and form.

According to the utility model discloses a diameter-changing dense net support that above-mentioned an embodiment provided, wherein metal material is the wire of memory alloy material, including but not limited to cobalt chromium nickel alloy, platinum core nickel titanium alloy, platinum tungsten alloy, nickel titanium alloy.

According to the utility model discloses an above-mentioned one embodiment of reducing dense net support that provides, wherein non-metallic material includes but not limited to polydioxanone, levorotatory polylactic acid, polycaprolactone.

According to the utility model discloses embodiment's dense net support of reducing's advantage lies in: the stent has the advantages that the stent can adapt to the characteristics of thin far end and thick near end of a blood vessel, so that the stent can be better attached to the blood vessel, and the damage to the inner wall of the blood vessel caused by applying too large supporting force to the wall of the blood vessel with thin diameter while the stent moves in the thick blood vessel is avoided; the clinician does not need to adopt the mode of nesting a plurality of brackets with different diameters to combine a longer bracket operation mode, thereby reducing the operation time and lightening the operation burden of the patient.

While the present application has been described and illustrated with reference to particular embodiments thereof, such description and illustration are not intended to limit the present application. It will be clearly understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof within the embodiments without departing from the true spirit and scope of the present application as defined by the appended claims. The illustrations may not be drawn to scale. There may be a difference between the technical reproduction in the present application and the actual device due to variables in the manufacturing process and the like. There may be other embodiments of the application that are not specifically illustrated. The specification and drawings are to be regarded in an illustrative rather than a restrictive sense. Modifications may be made to adapt a particular situation, material, composition of matter, method, or process to the objective, spirit and scope of the present application. All such modifications are intended to be within the scope of the claims appended hereto. Although the methods disclosed herein have been described with reference to particular operations performed in a particular order, it should be understood that these operations may be combined, sub-divided, or reordered to form equivalent methods without departing from the teachings of the present application. Accordingly, unless specifically indicated herein, the order and grouping of the operations is not a limitation of the present application.

Claims (6)

1. The variable-diameter dense-net support is characterized by comprising at least two first components and a second component connected between every two adjacent first components, wherein the first components are hollow straight cylinders, the second components are hollow cones, the adjacent first components and the second components are communicated with each other, and the diameter of the first component close to the far end of the variable-diameter dense-net support is smaller than that of the first component far from the far end of the variable-diameter dense-net support.

2. The variable-diameter dense mesh stent according to claim 1, wherein the diameter R2 of the proximal end of the variable-diameter dense mesh stent is larger than the diameter R1 of the distal end of the variable-diameter dense mesh stent, and the difference between the diameter R2 of the proximal end of the variable-diameter dense mesh stent and the diameter R1 of the distal end of the variable-diameter dense mesh stent is greater than or equal to 1nm and smaller than 4nm.

3. The variable diameter dense mesh stent of claim 1, wherein the diameter of the distal end of the second member is the same as the diameter of the first member connected to the distal end of the second member, the diameter of the proximal end of the second member is the same as the diameter of the first member connected to the proximal end of the second member, and the second member transitions in cross-section from a minimum diameter to a maximum diameter in a direction from the distal end to the proximal end.

4. The variable diameter dense mesh stent of any one of claims 1 to 3, wherein the variable diameter dense mesh stent is woven from woven wires of a metal material or woven wires of a non-metal material.

5. The variable diameter dense mesh stent of claim 4, wherein the metal material is a metal wire of a memory alloy material, and comprises cobalt-chromium-nickel alloy, platinum-gold core nickel-titanium alloy, platinum-tungsten alloy and nickel-titanium alloy.

6. The variable diameter dense mesh stent of claim 4, wherein the non-metallic material comprises polydioxanone, poly-L-lactic acid, and polycaprolactone.

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