Woven stent with developing characteristic

Abstract

The utility model relates to a woven stent with a developing characteristic, which comprises a tubular stent, the tubular stent is composed of a plurality of rows of support rings from front to back, each row of support rings are arranged in a sine wave shape, two adjacent rows of support rings are connected through reinforcing ribs, the support rings and the reinforcing ribs are made of nickel titanium-platinum composite wires, and the reinforcing ribs are made of nickel titanium-platinum composite wires. The platinum core layer is arranged in the middle of the nickel-titanium-platinum composite filament, the nickel-titanium outer layer is arranged outside the platinum core layer, and the developing filament is arranged in the nickel-titanium outer layer. According to the utility model, the stent with a special tubular structure is adopted to manufacture the stent, so that the stent is uniformly and stably stressed in the extrusion or recovery process, and the support rings are connected through the reinforcing ribs, so that the strength of the stent is improved. In addition, the stent is made of the nickel-titanium-platinum composite wire, the nickel-titanium outer layer has the functions of supporting, bending, restoring and the like, the platinum core layer is not prone to fracture or deformation, high toughness is achieved, external force can be resisted to a certain degree, and the strength of the nickel-titanium-platinum composite wire is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical devices, in particular to a braided stent with developing characteristics. BACKGROUND

[0002] The treatment of intravascular stents has been rapidly developed as a minimally invasive surgical method in recent years. Nickel-titanium alloy material has good shape memory function and is often used in implantable braided stent products. However, due to the low density of nickel-titanium alloy, it is difficult to find such mesh stents in a radiographic state after being implanted in the body. However, intravascular stents have high requirements for strength, support performance, bending performance, toughness, and anti-burst deformation, which is also a prominent problem and difficulty in clinical application. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a braided stent with developing characteristics which has stable structure, high strength, good toughness and anti-burst effect.

[0004] The utility model discloses a braided stent with developing characteristics which has the advantages of the following.

[0005] A braided stent with developing characteristics comprises a tubular stent, the middle of the tubular stent is hollow, the tubular stent is composed of multiple rows of support rings from front to back, each row of support rings is arranged in a sinusoidal shape, and the adjacent two rows of support rings are connected through a reinforcing rib.

[0006] The thickness of the nickel-titanium outer layer is greater than that of the platinum core layer.

[0007] Compared with the prior art, the design of the utility model has the following advantages.

[0008] The braided stent with developing characteristics is made of a special tubular structure, which can make the stent bear stress evenly and stably during extrusion or recovery, the support rings are connected through reinforcing ribs, and the strength of the stent is increased. In addition, the stent is made of nickel-titanium-platinum composite wire, the nickel-titanium outer layer has the functions of support, bending, recovery, etc., the platinum core layer is not easy to break or deform, has high toughness, can resist external force to a certain extent, and improves the strength of the nickel-titanium-platinum composite wire. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a structural schematic view of the braided stent with developing characteristics.

[0010] Figure 2 It is a structural schematic view of the braided stent with developing characteristics. Figure 1Enlarged view of the connection between the support ring and the reinforcing rib.

[0011] Figure 3 Cross-sectional view of the nickel-titanium-platinum composite wire.

[0012] Wherein: the tubular stent 1, the support ring 2, the reinforcing rib 3, the nickel-titanium-platinum composite wire 4, the platinum core layer 4.1, the platinum core layer 4.1, the nickel-titanium outer layer 4.2. DETAILED DESCRIPTION

[0013] Referring to Figure 1 and Figure 2 The utility model discloses a kind of braided stents with developing characteristics, stent hollow tubular structure, stent whole is woven by nickel-titanium-platinum composite wire 1, by nickel-titanium bar material hole, platinum core bar 1.1 is inserted into nickel-titanium alloy pipe blank 1.2, final product is obtained after subsequent drawing, annealing, straightening, centerless grinding etc. Process, the wire material not only has the superelasticity and shape memory characteristic of nickel-titanium material, also has the high toughness and high developing property of platinum material, adopt the wire material of this kind to weave and make stent, improve the transportability of stent in complex cavity such as curved blood vessel and moving limb blood vessel etc., and can be accurately positioned under X-ray, to help doctor to carry out implantation operation, platinum core wire used in the utility model can be replaced by other high-strength, biocompatible, high-developing metal etc., with similar effect.

[0014] Referring to Figures 1 to 3 The utility model relates to a kind of braided stents with developing characteristics, including tubular stent 1, the middle hollow of this tubular stent 1, this tubular stent is by multiple rows of support ring 2 from front to back composition, each row of support ring 2 is arranged in sinusoidal wave shape, "sinusoidal wave" this symmetrical unit ring structure can make stent be stressed evenly and stably in being extruded or restoring process, it is suitable to be used as stent. But when being used as stent, support ring 2 will be extruded and deformed or restore, leading to support unit height will increase and reduce change, stent will thus occur small range elongation and axial shortening. Therefore, adjacent two rows of support ring 2 are connected by reinforcing rib 3.

[0015] The support ring 2, reinforcing rib 3 are made of nickel-titanium-platinum composite wire 4, the middle of this nickel-titanium-platinum composite wire 4 is platinum core layer 4.1, the outside of platinum core layer 4.1 is nickel-titanium outer layer 4.2, nickel-titanium outer layer 4.2 has developing wire, for developing effect in medical image.

[0016] The thickness of nickel-titanium outer layer 4.2 is greater than platinum core layer 4.1, nickel-titanium outer layer 4.2 plays the function of support, bending, restoring etc., platinum core layer 4.1 is not easy to break or deform, with higher toughness, can resist external force to some extent, improve the strength of nickel-titanium-platinum composite wire 4.

Claims

1. A braided support with developing properties, characterized in that: The device includes a tubular support with a hollow center. The tubular support is composed of multiple rows of support rings arranged from front to back. Each row of support rings is arranged in a sinusoidal wave shape. Adjacent rows of support rings are connected by reinforcing ribs. The support rings and reinforcing ribs are made of nickel-titanium-platinum composite wire. The nickel-titanium-platinum composite wire has a platinum core layer in the middle and a nickel-titanium outer layer on the outside. The nickel-titanium outer layer contains developing wires.

2. The braided support with developing properties according to claim 1, characterized in that: The thickness of the nickel-titanium outer layer is greater than that of the platinum core layer.

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