CN105266934A - Woven vascular stent - Google Patents
Woven vascular stent Download PDFInfo
- Publication number
- CN105266934A CN105266934A CN201510590208.8A CN201510590208A CN105266934A CN 105266934 A CN105266934 A CN 105266934A CN 201510590208 A CN201510590208 A CN 201510590208A CN 105266934 A CN105266934 A CN 105266934A
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- stent
- intravascular stent
- described support
- welded pipe
- weaving type
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Abstract
The invention discloses a woven vascular stent, which has a pipe network-shaped structure woven by at least one super-elastic memory alloy wire. The stent, on the whole, is in a flat cylinder shape. The front end and the tail end of the wire are fixed together in a direct welding mode or welded together in a welding pipe mode. The wire at the end part of the stent has a closed structure. Two end parts of the stent are provided with development points. The end part of the stent is sine-shaped, Z-shaped, or a sine and Z combination-shaped. The stent can be recovered and reset. The woven wire at the end part of the stent has a closed shape and is arc-shaped, the front end and the tail end of the woven wire of the stent are fixed and welded together, adherence and corrosion resistance of the stent are improved, and the end part of the stent and the front end and the tail end of the woven wire can be prevented from puncturing the blood vessel; and as the surfaces of two ends of the stent are provided with the development points, development performance of the stent is provided, and operation and positioning under X rays by a medical staff can be facilitated.
Description
Technical field
The present invention relates to a medical apparatus and instruments, be specifically related to a kind of intravascular stent of Weaving type of super elastic marmen, belong to technical field of medical instruments.
Background technology
Along with raising and the living-pattern preservation of people's living standard, peripheral blood vessel sickness rate is more and more higher, if these diseases are treated not in time may cause blood vessel blockage, by the life security of the serious harm mankind.
Along with the progress in epoch, main employing Micro trauma interventional procedure at present, the wound of these class methods to patient is little, and safety is high, and effectiveness high is subject to the affirmative of doctor and patient, has become the critical treatment method of peripheral blood vessel.Interventional therapy method refers to implants inner support in vascular lesion section, and the inner support of implantation can support stenosis occlusion section blood vessel, reduces blood vessel elasticity retraction and moulding again, keeps tube chamber blood flow unobstructed, also have the effect of prevention of restenosis.Wherein, close mesh braided support due to its good compliance, stronger support force, good adherent property, excellent fatigue resistance and its less impact of blood vessel is paid close attention to widely.
At present, for the intravascular stent woven by multi-filament material, its end silk material generally without special fixing or special structural design, thus presents the original woven condition of dispersing uniformly.This kind of support in use may produce at random, and the end that also may have part silk material spins off and is suspended in blood vessel from braiding structure, have impact on the adherent property of bracket end, can improve the probability causing thrombosis time serious.
American documentation literature US2007/0112415A1 discloses a kind of radial self-expanding stent for being implanted in body passageway, it comprises first and second groups of filaments, these first and second groups of filaments are woven in together and define the tubular stent body with two ends, and some or all wherein in the filament end, end of rack body are fixed together in pairs.
Chinese patent literature CN102551933A discloses a kind of braided support, braided support is woven by multi-filament material and forms, according to the silk material radical of braided support, the silk material of bracket end is divided into some stocks, each rhizoid material wherein in per share silk material is fixed together, bracket end silk material effectively can be prevented at random, improve the adherent property of support and transportation performance.
Chinese patent literature CN102727332A discloses the support that a kind of blood flow has good stability, this support combines the second single line group by mutual woven bag first single line and forms, described first single line group is wound in right-hand screw shape around the virtual center axle extended along the long side direction of described support, described second single line group is wound in left-hand screw shape around described virtual center axle, and the maximum gauge forming the first single line of described first single line group is different from the maximum gauge of the second single line forming described second single line group, thus on the medial surface of support, form spiral helicine groove portion, the blood flow flowing through rack bore can be made to stablize.
The end of the support in above-mentioned patent documentation is that adjacent two braided wires weld together in pairs, or per share silk material end is fixed together, or the first and last end of the braided wires of support becomes open state.Though can play the effect of temporary transient vascular restenosis after human body inserted by above-mentioned support, but end is welded and fixed in pairs or becomes open state, and end is all relatively more sharp-pointed, easily causes vascular damaged, and once support release, can not reclaim it and reset.
Summary of the invention
In view of the deficiency of the above-mentioned braided support of prior art, the object of the invention is to the intravascular stent developing a kind of Weaving type, it can effectively prevent bracket end silk material at random, improve the adherent property of support and transportation performance, the B alloy wire of support both ends of the surface becomes closing structure, reduces the damage to blood vessel wall, avoids poking blood vessel, and support can be undertaken reclaiming and resetting by induction system, is beneficial to and is placed on lesions position.
Object of the present invention realizes especially by following technical scheme:
A kind of intravascular stent of Weaving type, the TRS that described support is woven by least one hyperelastic memory alloy wire, described support entirety is straight cylindrical, the first and last end of described silk is fixed together by the mode of directly welding, or welded together by the mode of welded pipe, the silk of described bracket end is closing structure, development point is contained at the both ends of described support, the end shape of described support is the assembly of sinusoidal pattern or Z-type or sinusoidal pattern and Z-type, and described support can reclaim and reset.
Further, the braided wires of described support can select nitinol alloy wire, or the platinum core titanium-nickel wire that developability is high.
Further, the braided wires diameter 0.12-0.20mm of described support.
Further, the end head number of described support can be 6, or 9, or 12.
Further, the braided wires first and last end of described support by the mode of directly welding or can be fixed together by the mode of welded pipe.
Further, the development point material of described bracket end can be one or more in tantalum, platinum, tungsten.
Further, described development point is the tubular structure of hollow.
Further, described welded pipe is that surface has U-shaped hole.
Further, described welded pipe surface has 11 U-shaped holes or 2 U-shaped holes.
Further, the material of described welded pipe is Nitinol.
Further, the external diameter of described welded pipe is 0.20mm-0.50mm, and internal diameter is 0.14mm-0.40mm, and length is 2.0mm-5.0mm.
Further, described support can be undertaken reclaiming and resetting by induction system.
Compared with prior art, the end braided wires of support of the present invention is closure state, and in circular arc, the first and last end of Stent silk is weldingly fixed on together, improve adherent property and the rotproofness of support, and the first and last end of the end and braided wires that avoid support pokes blood vessel; Support can carry out reclaiming and resetting, and is beneficial to and is placed on affected area; Development point is contained on the surface at the two ends of support, provides the developability of support, is convenient to medical personnel and operates under X-ray and locate.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described.It is evident that, the accompanying drawing in the following describes is only some specific embodiments recorded in the application, and it is not the restriction to protection scope of the present invention.For those of ordinary skill in the art, under the prerequisite not paying creative work, certainly can also obtain some other embodiment and accompanying drawing according to these embodiments of the present invention and accompanying drawing thereof.
Fig. 1 is the structural representation of intravascular stent of the present invention.
Fig. 2 A, Fig. 2 B, Fig. 2 C and Fig. 2 D are respectively several preferred embodiment end construction schematic shapes of intravascular stent of the present invention.
Fig. 3 A, Fig. 3 B and Fig. 3 C are respectively the end head table structure schematic diagram of intravascular stent of the present invention.
Fig. 4 A and Fig. 4 B is respectively the structural representation of several preferred embodiments of welded pipe.
Fig. 5 A and Fig. 5 B is respectively the direct Welding Structure schematic diagram of braided wires first and last end of intravascular stent of the present invention.
Several preferred embodiment schematic diagrams that the braided wires first and last end that Fig. 6 A, Fig. 6 B and Fig. 6 C are respectively intravascular stent of the present invention is fixedly connected with by welded pipe.
In figure: 1, support, 2, welded pipe, 2-1, diplopore welded pipe, 2-1A, U-shaped hole, 2-2, single hole welded pipe, 2-2B, U-shaped hole, 3, B alloy wire is woven, 3-1, braided wires head end, 3-2, braided wires end, 4, bracket end shape, 4-1, Z-type shape, 4-2, sinusoidal pattern shape, the combined shaped of 4-3,1 Z-type and 1 sinusoidal pattern, the combined shaped of 4-4,1 Z-type and 2 sinusoidal patterns, 5, development point
Detailed description of the invention
In order to make those skilled in the art person understand technical scheme in the application better, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the specific embodiment described in the application, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should drop within concept of the present invention.
Referring now to accompanying drawing, the invention will be further described.
As shown in Figure 1, a kind of intravascular stent 1 of Weaving type be by least one super elastic memory nitinol alloy wire 3 by one end to other end spiral woven on certain moduli tool, vertically with radial direction mutual crossed loops around and circulation braiding webmaster shape structure stand, again through 450 DEG C-510 DEG C high-temperature shaping 10-15 minute, just form the self-expanding braided support 1 of band memory function.
The string diameter of described nitinol alloy wire 3 is 0.12mm-0.20mm, according to use needs, selects the string diameter of suitable B alloy wire 3; The platinum core titanium-nickel wire that described nitinol alloy wire 3 can also select developability good, improves the visuality of intravascular stent 1 under X-ray.
Described intravascular stent 1, by regulating the modes such as the string diameter of nitinol alloy wire 3 of braided support, count and heat treatment parameter, regulating radial support power and compliance, better adapting to clinical demand.
Fig. 2 A and Fig. 2 B is the enlarged drawing of label 4 in Fig. 1.
Consult Fig. 2 A, Fig. 2 B, Fig. 2 C and Fig. 2 D, the shape of the support head end 4 of described intravascular stent 1 can be sinusoidal pattern, or Z-type, or both assemblys, head end 4 shape that Fig. 2 A provides for the embodiment of the present invention is the structural representation of Z-type, head end 4 shape that Fig. 2 B provides for the embodiment of the present invention is the structural representation of sinusoidal pattern, and the head end shape of sinusoidal pattern or Z-type is all the convex structure closed, and effectively can reduce the damage to blood vessel wall.Fig. 2 C and Fig. 2 D is the combinative structure schematic diagram of sinusoidal pattern and Z-type head end 4 shape, and Fig. 2 C is the combinative structure schematic diagram of a sinusoidal pattern and Z-type head end 4 shape, and Fig. 2 D is the combinative structure schematic diagram of two sinusoidal patterns and Z-type head end 4 shape.
Containing development point 5 on the head end 1 of described intravascular stent 1, described development point 5 be the tubular structure of hollow, and described intravascular stent 1, when weaving, by braided wires 3 through development 5, and makes development 5 be positioned at the end of support 1.The described material developing point 5 can be one or more in tantalum, platinum, tungsten.
Consult Fig. 3 A, 3B and 3C, the head number at described intravascular stent 1 two ends can be 6, also can be 9 or 12, Fig. 3 A bracket end size number be the structural representation of 9, Fig. 3 B bracket end size number is the structural representation of 6, and Fig. 3 C bracket end size number is the structural representation of 12.
Consult Fig. 5 A and 5B, the head end 3-1 of the braided wires of described intravascular stent 1 and end 3-2 is fixed together by the mode of directly welding, head end 3-1 and the end 3-2 of B alloy wire are side-by-side, are welded contact position in the middle of head end 3-1 and end 3-2 by laser-beam welding machine.In Fig. 5 A, head end 3-1 and end 3-2 is fixed by the mode of spot welding; In Fig. 5 B, head end 3-1 and end 3-2 is fixed by seam welding mode, and shadow region is weld seam.
The head end 3-1 of the braided wires of described intravascular stent 1 and end 3-2 also can be fixed together by the mode of welding indirectly, as being fixed together by the mode of welded pipe 2, the material of described welded pipe 2 is Nitinol, the external diameter of described welded pipe 2 is 0.20mm-0.50mm, internal diameter is 0.14mm-0.40mm, and length is 2.0mm-5.0mm.Consult Fig. 4 A and Fig. 4 B, described welded pipe 2 has two kinds of shapes, diplopore welded pipe 2-1 as shown in Figure 4 A and single hole welded pipe 2-2 as shown in Figure 4 B.As shown in Figure 4 A, described diplopore welded pipe 2-1 surface has 2 U-shaped hole 2-1A, and described single hole welded pipe 2-2 surface has 1 U-shaped hole 2-2B, the length of described U-shaped hole 2-1A and U-shaped hole 2-2B and wide difference.
Consult head end 3-1 and end 3-2 that Fig. 6 A, Fig. 6 B and Fig. 6 C, Fig. 6 A are braided wires by diplopore welded pipe 2-1 welded structure schematic diagram, head end 3-1 and end 3-2 contact surface are in the centre of diplopore welded pipe 2-1, and shadow region is weld seam; Fig. 6 B and Fig. 6 C is that the head end 3-1 of braided wires and end 3-2 is by single hole welded pipe 2-2 welded structure schematic diagram, in Fig. 6 B, employ 1 single hole welded pipe 2-2, shadow region is weld seam, in Fig. 6 C, employ 2 single hole welded pipe 2-2, shadow region is weld seam, use 2 welded pipe 2-2, provide the bonding strength of head end 3-1 and end 3-2.
The head end 3-1 of the braided wires of described intravascular stent 1 and end 3-2 is fixed together by the mode of welding, and braided wires 3 first and last end can be avoided to poke blood vessel wall.
The present invention is mainly used in the angiostenosis problem that vascular lesion causes, and is particularly useful for ilium, Gu, popliteal stricture of artery pathological changes.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be limited to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (13)
1. the intravascular stent of a Weaving type, the TRS that described support is woven by least one hyperelastic memory alloy wire, described support entirety is straight cylindrical, the first and last end of described silk is fixed together by the mode of directly welding, or welded together by the mode of welded pipe, the silk of described bracket end is closing structure, development point is contained at the both ends of described support, the end shape of described support is the assembly of sinusoidal pattern or Z-type or sinusoidal pattern and Z-type, and described support can reclaim and reset.
2. the intravascular stent of a kind of Weaving type according to claim 1 or 2, wherein, the braided wires of described support can select nitinol alloy wire, or the platinum core titanium-nickel wire that developability is high.
3. the intravascular stent of a kind of Weaving type according to any one in claim 1 to 2, wherein, the braided wires diameter 0.12-0.20mm of described support.
4. the intravascular stent of a kind of Weaving type according to claim 1, wherein, the head end shape of described support is sinusoidal pattern, or Z-type, or both assemblys.
5. the intravascular stent of a kind of Weaving type according to claim 1, wherein, the end head number of described support can be 6, or 9, or 12.
6. the intravascular stent of a kind of Weaving type according to claim 1, wherein, the development point material of described bracket end can be one or more in tantalum, platinum, tungsten.
7. the intravascular stent of a kind of Weaving type according to claim 1 or 6, wherein, the development point of described bracket end is the tubular structure of hollow.
8. the intravascular stent of a kind of Weaving type according to claim 1, wherein, the braided wires first and last end of described support by the mode of directly welding or can be fixed together by the mode of welded pipe.
9. the intravascular stent of a kind of Weaving type according to claim 1 or 8, wherein, described welded pipe is that surface has U-shaped hole.
10. the intravascular stent of a kind of Weaving type according to claim 1 or 9, wherein, described welded pipe is that surface has 1 U-shaped hole or 2 U-shaped holes.
The intravascular stent of a kind of Weaving type described in 11. according to Claim 8 to 10, wherein, the material of described welded pipe is Nitinol.
The intravascular stent of a kind of Weaving type in 12. according to Claim 8 to 11 described in any one, wherein, the external diameter of described welded pipe is 0.20mm-0.50mm, and internal diameter is 0.14mm-0.40mm, and length is 2.0mm-5.0mm.
The intravascular stent of 13. a kind of Weaving types according to claim 1, wherein, described support can be undertaken reclaiming and resetting by induction system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510590208.8A CN105266934A (en) | 2015-09-17 | 2015-09-17 | Woven vascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510590208.8A CN105266934A (en) | 2015-09-17 | 2015-09-17 | Woven vascular stent |
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| CN105266934A true CN105266934A (en) | 2016-01-27 |
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| CN201510590208.8A Pending CN105266934A (en) | 2015-09-17 | 2015-09-17 | Woven vascular stent |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105559945A (en) * | 2016-02-29 | 2016-05-11 | 微创心脉医疗科技（上海）有限公司 | Covered stent and manufacturing method thereof |
| CN106073957A (en) * | 2016-06-20 | 2016-11-09 | 常州乐奥医疗科技股份有限公司 | A kind of Novel weaved intravascular stent |
| CN106175981A (en) * | 2016-03-04 | 2016-12-07 | 上海沐春投资管理有限公司 | A kind of part band film intravenous type support |
| CN106618818A (en) * | 2017-02-05 | 2017-05-10 | 常州乐奥医疗科技股份有限公司 | Woven vascular drug stent |
| CN106725643A (en) * | 2016-06-22 | 2017-05-31 | 苏州茵络医疗器械有限公司 | For the membrane-repturing device of Endovascular operation |
| CN110251282A (en) * | 2019-06-14 | 2019-09-20 | 上海七木医疗器械有限公司 | A kind of polymer support establishment forming method and a kind of end face processing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105559945A (en) * | 2016-02-29 | 2016-05-11 | 微创心脉医疗科技（上海）有限公司 | Covered stent and manufacturing method thereof |
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| CN110251282A (en) * | 2019-06-14 | 2019-09-20 | 上海七木医疗器械有限公司 | A kind of polymer support establishment forming method and a kind of end face processing equipment |
| CN110251282B (en) * | 2019-06-14 | 2020-11-10 | 上海七木医疗器械有限公司 | Polymer scaffold weaving and forming method and end face processing equipment |
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