CN103932821A - Covered stent - Google Patents
Covered stent Download PDFInfo
- Publication number
- CN103932821A CN103932821A CN201410138792.9A CN201410138792A CN103932821A CN 103932821 A CN103932821 A CN 103932821A CN 201410138792 A CN201410138792 A CN 201410138792A CN 103932821 A CN103932821 A CN 103932821A
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- overlay film
- film frame
- frame unit
- main body
- far
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Abstract
The invention provides a covered stent which comprises a cylindrical covered stent body. A plurality of middle covered stent units are sequentially connected to the near end and/or the far end of the covered stent body in a sleeved mode, and each middle covered stent unit comprises a tubular covering film and an annular stent body fixed to the surface of the near end of the covering film, wherein parts of adjacent middle covered stent units are overlapped. By means of the structure, the covering films forming the middle covered stent units are arranged in the overlapped mode, and in this way, the sealing effect on the near end and/or the far end of the covered stent body can be easily improved; meanwhile, the arrangement density of the stent bodies located at the near end and/or the far end of the covered stent body can be improved, the radial supporting force can be easily increased, and the covered stent can be effectively prevented from being shifted. In addition, the bending or arrangement flexibility of the near end and/or the far end of the covered stent can be improved, the covered stent can be well matched with the blood vessel wall or the tumor neck accordingly, and inner leakage is prevented from being formed at the end of covered stent.
Description
Technical field
The present invention relates to a kind of overlay film frame.
Background technology
Aneurysm is very dangerous clinically a kind of angiopathy, therefore, once finding aneurysm patient, should to it, carry out corresponding treatment as early as possible.At present, utilizing the Wicresoft of inner cavity insulation principle to hinder interventional therapeutic technique is utilized widely, it is by the thinner induction system of a set of caliber, after the overlay film frame of confined state being sent to the position of lesion vessels, accurately discharge, cover lesion vessels section, isolated tumor chamber also forms new channel of blood flow; Aneurysm is after losing blood supply, and tumor intracavity remained blood forms thrombosis gradually and flesh changes into vascular tissue, and the tumor wall of expansion state, because shunk by negative pressure, returns to gradually and approaches original form, thereby reaches the aneurysmal object for the treatment of.This technology has alleviated operation wound, patient recovers faster greatly.
Yet in therapeutic process, existing overlay film frame discharges being easily the forced to property bending distortion of rear its end, makes the adherent degradation of overlay film frame and blood vessel wall or tumor neck, easily causes overlay film frame displacement and internal hemorrhage due to trauma.For fear of these two complication, strengthen grappling and the stickiness of overlay film frame.
Summary of the invention
In view of this, main purpose of the present invention is, a kind of overlay film frame that is conducive to improve the sealing effectiveness of overlay film frame end is provided.
For achieving the above object, the present invention proposes a kind of overlay film frame, comprise the overlay film frame main body that is tubular, near-end and/or far-end in described overlay film frame main body are socketed with a plurality of middle overlay film frames unit successively, this overlay film frame unit, centre comprises overlay film in a tubular form and is fixed on proximal end face the ringwise single support of described overlay film, wherein, adjacent described middle overlay film frame cell mesh is overlapping.
Adopt said structure, overlapping owing to being positioned at the middle overlay film frame cell mesh of adjacent setting of described overlay film frame proximal and/or far-end, the overlay film of overlay film frame unit in the middle of forming is overlapped, be conducive to like this improve the near-end of described overlay film frame main body and/or the sealing effectiveness of far-end; Meanwhile, can also increase the arranging density that is positioned at the near-end of overlay film frame main body and/or the support of far-end, so be conducive to increase the radial support power of overlay film frame proximal and/or far-end, can effectively avoid overlay film frame displacement.In addition, because overlay film frame unit in the middle of a plurality of is socketed setting successively at near-end and/or the far-end of described overlay film frame main body, the directivity of overlay film frame near-end and/or far-end is reduced, can improve the crooked of overlay film frame near-end and/or far-end or motility is set, thereby blood vessel wall or tumor neck are suitable better, avoid forming internal hemorrhage due to trauma in the end of overlay film frame.
Preferably, far-end in described overlay film frame main body is socketed with a plurality of described middle overlay film frame unit and a tail end overlay film frame unit successively, described tail end overlay film frame unit is overlapping with the middle overlay film frame cell mesh that is close to it, and the axial length that the difference of described tail end overlay film frame unit and described middle overlay film frame unit is the latter is greater than the former.
Preferably, the axial length of the overlay film of described middle overlay film frame unit is greater than the axial length of the formed annular of its support, by the marginal portion that is positioned at the overlay film of described middle overlay film frame unit far-end, forms commissura.
Adopt said structure, far-end formation commissura due to the overlay film in described middle overlay film frame unit, when in the middle of described, the socket of overlay film frame unit arranges, be conducive to increase the overlapping area of adjacent middle overlay film frame unit, thereby be conducive to improve the near-end of described overlay film frame main body and/or the sealing effectiveness of far-end.
Preferably, in the middle of described the commissura of overlay film frame unit by suture on the middle overlay film frame unit being adjacent or overlay film frame main body or tail end overlay film frame unit.
Preferably, in the middle of described, the commissura of overlay film frame unit links into an integrated entity by hot pressing mode and the middle overlay film frame unit being adjacent or overlay film frame main body or tail end overlay film frame unit.
Preferably, on the described middle overlay film frame unit of proximal head that is positioned at described overlay film frame main body, be provided with a bare bracket.
Adopt said structure, owing to being provided with a bare bracket on the described middle overlay film frame unit of proximal head that is positioned at described overlay film frame main body, after overlay film frame discharges, bare bracket can be anchored on blood vessel or tumor neck wall, so can improve the fix tightly solidity of overlay film frame near-end, avoid overlay film frame displacement.
Preferably, described bare bracket bends institute by involutory spun gold and forms, and on described bare bracket, near its formed crest and/or trough place, is fixed with agnail.
Adopt said structure, owing to being fixed with agnail on described bare bracket, by this agnail, can improve the grappling adhesion of bare bracket and blood vessel or tumor neck wall, be conducive to improve the fix tightly solidity of overlay film frame near-end, avoid overlay film frame displacement.
Preferably, described overlay film frame main body is similar to and is straight cylinder shape, in the middle of described, overlay film frame unit and tail end overlay film frame unit are all by near-end to the tapered cylindrical shape of far-end, and in the middle of near-end described, overlay film frame unit is all positioned at the inner side of overlay film frame unit in the middle of far-end described or tail end overlay film frame unit.
Preferably, the described middle overlay film frame unit that is close to the near-end setting of described overlay film frame main body is positioned at the near-end inner side of described overlay film frame main body, and the described middle overlay film frame unit that is close to the far-end setting of described overlay film frame main body is positioned at the far-end outside of described overlay film frame main body.
Accompanying drawing explanation
Fig. 1 is the overall schematic of overlay film frame;
Fig. 2 is the schematic diagram that is positioned at the middle overlay film frame unit of overlay film frame proximal head;
Fig. 3 is the schematic diagram that is positioned at the middle overlay film frame unit at overlay film frame two ends;
Fig. 4 is the schematic diagram that is positioned at the overlay film frame main body at overlay film frame middle part;
Fig. 5 is the schematic diagram that is positioned at the tail end overlay film frame unit of overlay film frame far-end afterbody.
The specific embodiment
Below with reference to Fig. 1～Fig. 5, the specific embodiment of overlay film frame of the present invention is described in detail.In following description, near-end refers to that overlay film frame is near one end of heart, and far-end refers to that overlay film frame is away from one end of heart.
As shown in Figure 1 and Figure 4, overlay film frame 1 mainly comprises an approximate overlay film frame main body 4 that is straight cylinder shape open at both ends, and the distal diameter of this overlay film frame main body 4 is slightly smaller than its proximal diameter.Overlay film frame main body 4 consists of a plurality of main body racks 41 of axially uniformly-spaced arranging along it and the main body overlay film 42 that is sleeved on these a plurality of main body racks 41 outsides, wherein, single main body rack 41 is by involutory spun gold, to carry out " W " shape to bend formed alloy hoop or braiding structure, this B alloy wire should meet the requirement of implant into body, and it comprises: niti-shaped memorial alloy, NiTi superelastic alloy, 316L medical stainless steel alloy, implantable cobalt chromium dynamax.Main body overlay film 42 is thin type blood vessel, and it is made by medical macromolecular materials, comprising: polyester fiber yarn fabric, politef, polyamide yarn fabric, polypropylene spun fabric.
Near-end and far-end in overlay film frame main body 4 are socketed with respectively a plurality of middle overlay film frames unit 3 successively, in the outside that is positioned at the middle overlay film frame unit 3 of overlay film frame main body 4 far-end afterbodys, are socketed with a tail end overlay film frame unit 8.Middle overlay film frame unit 3 and tail end overlay film frame unit 8 are all by near-end and are tapered and the cylindrical shape of open at both ends to far-end, they by overlay film in a tubular form and be fixed on this overlay film internal face and ringwise single be configured to, this overlay film adopts the material identical with aforementioned body overlay film 42 to make, single support also adopts the material identical with aforementioned body support 41 to make, therefore do not repeat at this.As shown in Figure 3 and Figure 5, in the present embodiment, the axial length of middle overlay film frame unit 3 is greater than the axial length of tail end overlay film frame unit 8, in the middle of being in particular, the axial length of the overlay film of overlay film frame unit 3 is greater than the axial length of the overlay film of tail end overlay film frame unit 8, the top of the single support of middle overlay film frame unit 3 and tail end overlay film frame unit 8 all keeps flushing with the proximal edge of corresponding overlay film, the bottom of single support of tail end overlay film frame unit 8 and the remote edge of its overlay film keep flushing, and the bottom of the single support of middle overlay film frame unit 3 does not flush with the far-end of its overlay film, in the middle of, the axial length of the overlay film of overlay film frame unit 3 is greater than the axial length of the formed annular of its support, marginal portion by the overlay film of overlay film frame unit 3 far-ends in the middle of being positioned at forms commissura 10.
As shown in Figure 1, the middle overlay film frame unit 3 of near-end is all positioned at the inner side of the middle overlay film frame unit 3 of far-end, wherein, the middle overlay film frame unit 3 that is close to the near-end setting of overlay film frame main body 4 is positioned at the near-end inner side of overlay film frame main body 4, the middle overlay film frame unit 3 that is close to the far-end setting of overlay film frame main body 4 is positioned at the far-end outside of overlay film frame main body 4, and tail end overlay film frame unit 8 is positioned at the outside of the middle overlay film frame 3 being adjacent.Overlay film frame 1 by near-end to the direction of far-end, be positioned at overlay film frames unit 3, overlay film frame main body 4 in the middle of overlay film frame main body 4 near-ends a plurality of, be positioned at overlay film frame unit 3 and tail end overlay film frame unit 8 in the middle of overlay film frame main body 4 far-ends a plurality of and connect together successively.The trough of the support of the overlay film frame unit of near-end is just between two crests of the support of the overlay film frame unit of the far-end being adjacent; The commissura 10 of the overlay film of the overlay film frame unit of near-end partly overlaps with the proximal edge of the overlay film of the overlay film frame unit of adjacent far-end, and this commissura 10 can be sewn on the middle overlay film frame unit 3 of the far-end being adjacent or the near-end inwall of overlay film frame main body 4 or tail end overlay film frame unit 8 by stitching thread is all-round.
As shown in Figure 1, on the middle overlay film frame unit 3 of proximal head that is positioned at overlay film frame main body 4, be provided with a bare bracket 7, this bare bracket 7 is formed by the aforementioned B alloy wire that forms support being carried out to the bending of " W " shape.On bare bracket 7, in being fixed with respectively agnail 9 near its crest and trough place, this agnail 9 is also made by aforementioned B alloy wire, and it can, by forming in order to form the end of same B alloy wire of bare bracket 7, also can adopt independent B alloy wire to make.
By upper, owing to being positioned at the middle overlay film frame unit 3 of the adjacent setting of overlay film frame main body 4 near-ends and far-end, partly overlap, the overlay film of overlay film frame unit 3 in the middle of forming is overlapped, be conducive to like this improve the near-end of overlay film frame main body 4 and the sealing effectiveness of far-end; Meanwhile, can also increase the arranging density that is positioned at the near-end of overlay film frame main body 4 and the support of far-end, so be conducive to increase the radial support power of overlay film frame main body 4 near-ends and far-end, can effectively avoid overlay film frame displacement.In addition, because overlay film frame unit 3 near-ends in overlay film frame main body 4 in the middle of a plurality of and far-end are socketed setting successively, the directivity of overlay film frame near-end and far-end is reduced, can improve the crooked of overlay film frame near-end and far-end or motility is set, thereby blood vessel wall or tumor neck wall are suitable better, avoid forming internal hemorrhage due to trauma at near-end or the far-end of overlay film frame.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
For example, in the embodiment shown in fig. 1, near-end and far-end in overlay film frame main body 4 are equipped with a plurality of overlay film frames unit that is socketed and overlaps, yet not limited thereto, also can be only at near-end or the far-end of overlay film frame main body 4, socket partly overlapping a plurality of overlay film frames unit be set separately.
Again for example, in the above-described embodiments, overlay film frame main body 4 is approximate is straight cylinder shape, yet not limited thereto, overlay film frame main body also can be by near-end to the tapered cylindrical shape of far-end, and tumor neck or blood vessel that its concrete shape and size should be applicable with it are consistent.
Again for example, in the above-described embodiments, the commissura of the overlay film frame unit of near-end is utilized suture to be stitched together to realize with the far-end overlay film frame unit being adjacent and is connected to each other, yet not limited thereto, the commissura of the overlay film frame unit of near-end also can link into an integrated entity by hot pressing mode and the overlay film frame unit of the far-end being adjacent or the inwall of overlay film frame main body or tail end overlay film frame unit.
Claims (9)
1. an overlay film frame, comprise the overlay film frame main body (4) that is tubular, it is characterized in that, near-end and/or far-end in described overlay film frame main body (4) are socketed with a plurality of middle overlay film frame unit (3) successively, this overlay film frame unit, centre (3) comprises overlay film in a tubular form and is fixed on proximal end face the ringwise single support of described overlay film, wherein, adjacent described middle overlay film frame unit (3) partly overlaps.
2. overlay film frame according to claim 1, it is characterized in that, far-end in described overlay film frame main body (4) is socketed with a plurality of described middle overlay film frame unit (3) and a tail end overlay film frame unit (8) successively, described tail end overlay film frame unit (8) partly overlaps with the middle overlay film frame unit (2) that is close to it
The axial length that the difference of described tail end overlay film frame unit (8) and described middle overlay film frame unit (3) is the latter is greater than the former.
3. overlay film frame according to claim 2, it is characterized in that, in the middle of described, the axial length of the overlay film of overlay film frame unit (3) is greater than the axial length of the formed annular of its support, by the marginal portion that is positioned at the overlay film of described middle overlay film frame unit (3) far-end, forms commissura (10).
4. overlay film frame according to claim 3, it is characterized in that, described in the middle of overlay film frame unit (3) commissura (10) by suture on the middle overlay film frame unit (3) being adjacent or overlay film frame main body (4) or tail end overlay film frame unit (8).
5. overlay film frame according to claim 3, it is characterized in that, described in the middle of the commissura (10) of overlay film frame unit (3) by hot pressing mode and the middle overlay film frame unit (3) that is adjacent or overlay film frame main body (4) or tail end overlay film frame unit (8), link into an integrated entity.
6. overlay film frame according to claim 1 and 2, is characterized in that, on the described middle overlay film frame unit (3) of proximal head that is positioned at described overlay film frame main body (4), is provided with a bare bracket (7).
7. overlay film frame according to claim 6, is characterized in that, described bare bracket (7) bends institute by involutory spun gold and forms, and at upper close its formed crest of described bare bracket (7) and/or trough place, is fixed with agnail (9).
8. overlay film frame according to claim 2, is characterized in that, described overlay film frame main body (4) is approximate is straight cylinder shape, described in the middle of overlay film frame unit (3) and tail end overlay film frame unit (8) be all by near-end to the tapered cylindrical shape of far-end,
The described middle overlay film frame unit (3) of near-end is all positioned at the described middle overlay film frame unit (3) of far-end or the inner side of tail end overlay film frame unit (8).
9. overlay film frame according to claim 8, it is characterized in that, be close to the near-end inner side that overlay film frame unit (3) in the middle of described that the near-end of described overlay film frame main body (4) arranges is positioned at described overlay film frame main body (4), be close to the far-end outside that overlay film frame unit (3) in the middle of described that the far-end of described overlay film frame main body (4) arranges is positioned at described overlay film frame main body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410138792.9A CN103932821A (en) | 2014-04-08 | 2014-04-08 | Covered stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410138792.9A CN103932821A (en) | 2014-04-08 | 2014-04-08 | Covered stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103932821A true CN103932821A (en) | 2014-07-23 |
Family
ID=51180887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410138792.9A Pending CN103932821A (en) | 2014-04-08 | 2014-04-08 | Covered stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103932821A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106264782A (en) * | 2016-08-25 | 2017-01-04 | 北京奇伦天佑创业投资有限公司 | Overlay film frame |
| CN115363835A (en) * | 2022-10-27 | 2022-11-22 | 北京华脉泰科医疗器械股份有限公司 | Conveyor and conveyor handle for conveying stacked covered stents |
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| CN2582641Y (en) * | 2002-11-19 | 2003-10-29 | 微创医疗器械(上海)有限公司 | Arteria covering membrane supporter |
| CN1555769A (en) * | 2004-01-08 | 2004-12-22 | 东南大学 | Inner leak proof bendable internal cavity isolation artificial blood vessel support and artificial blood ressel |
| CN1736349A (en) * | 2004-08-17 | 2006-02-22 | 微创医疗器械(上海)有限公司 | Combined membrane-covered stent capable of being bent in any direction |
| CN102451051A (en) * | 2010-11-03 | 2012-05-16 | 上海市第六人民医院 | Self-expandable segment tectorial asymmetric areolate stent |
| CN203841853U (en) * | 2014-04-08 | 2014-09-24 | 许尚栋 | Stent graft |
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2014
- 2014-04-08 CN CN201410138792.9A patent/CN103932821A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6027525A (en) * | 1996-05-23 | 2000-02-22 | Samsung Electronics., Ltd. | Flexible self-expandable stent and method for making the same |
| US6340366B2 (en) * | 1998-12-08 | 2002-01-22 | Bandula Wijay | Stent with nested or overlapping rings |
| CN2582641Y (en) * | 2002-11-19 | 2003-10-29 | 微创医疗器械(上海)有限公司 | Arteria covering membrane supporter |
| CN1555769A (en) * | 2004-01-08 | 2004-12-22 | 东南大学 | Inner leak proof bendable internal cavity isolation artificial blood vessel support and artificial blood ressel |
| CN1736349A (en) * | 2004-08-17 | 2006-02-22 | 微创医疗器械(上海)有限公司 | Combined membrane-covered stent capable of being bent in any direction |
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| CN203841853U (en) * | 2014-04-08 | 2014-09-24 | 许尚栋 | Stent graft |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106264782A (en) * | 2016-08-25 | 2017-01-04 | 北京奇伦天佑创业投资有限公司 | Overlay film frame |
| CN115363835A (en) * | 2022-10-27 | 2022-11-22 | 北京华脉泰科医疗器械股份有限公司 | Conveyor and conveyor handle for conveying stacked covered stents |
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Application publication date: 20140723 |
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