CN209285856U - A kind of intravascular stent of high-flexibility - Google Patents
A kind of intravascular stent of high-flexibility Download PDFInfo
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- CN209285856U CN209285856U CN201821240872.5U CN201821240872U CN209285856U CN 209285856 U CN209285856 U CN 209285856U CN 201821240872 U CN201821240872 U CN 201821240872U CN 209285856 U CN209285856 U CN 209285856U
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- connecting member
- flexible connecting
- wave
- intravascular stent
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Abstract
The utility model discloses a kind of intravascular stents of high-flexibility, multiple ring holders including axial alignment, the ring holder by multiple waveforms the end to end formation of support unit, the support unit includes wave crest, trough, the wave bar being connected between wave crest and trough, in two adjacent rings ring holder, it is connected between the wave crests and trough of multiple and different circle support units by the first flexible connecting member, and first flexible connecting member also extends to be wound at least one support unit and forms the second flexible connecting member.The utility model provides a kind of intravascular stent with good compressibility, conveying flexibility and the high-flexibility for expanding uniformity.
Description
Technical field
The utility model belongs to the field of medical instrument technology, and in particular to a kind of bracket more particularly to one kind can be used for leading
The intravascular stent of the high-flexibility of arterial disease interventional therapy.
Background technique
Peripheral artery disease is a kind of common manifestation of systemic atherosclerosis, and disease incidence has obvious rising in recent years,
Common such as arteriosclerosis obliterans, arteriovenous thrombosis, aneurysm.Systemic arteriosclerosis and cardiovascular hair can be induced
Sick rate and the death rate.After lesion occurs for peripheral blood vessel, lumen of vessels stenosis is narrow, and the blood flow for injecting lower limb becomes smaller, and lower limb is caused to supply
Phenomena such as blood is insufficient, causes limb necrosis.
Peripheral artery disease primary treatments include medical treatment and operative treatment, wherein medical treatment: decompression, drop
Rouge, the disease progression that the treatments such as platelet aggregation-against can delay lower extremities to occlude, but blood vessel cannot be inherently eliminated
It is narrow, occlusion etc. organic diseases.Operative treatment: it is divided into open surgery and Endovascular interventional treatment.Endovascular intervention
Treatment: have the advantages that minimally invasive, easy to operate, curative for effect, repeatable operation, be the developing direction of diagnosis and treatment vascular conditions.
Aortic aneurysm refers to that aorta wall is local or diffused abnormal dilatation, oppresses peripheral organs and causes symptom, tumor
Shape is broken into its main hazard.Often occur in aorta ascendens, the arch of aorta, descending aorta, thoracoabdominal aorta and abdominal aorta.It is main
Aneurysm can be divided into true property aortic aneurysm, false aortic aneurysm and dissecting aneurysm by structure.Aortic aneurysm causes intravascular
A possibility that side pressure is increased, therefore is expanded in progressive, if long-run development, is finally ruptured after all, and knurl is bigger, rupture is bigger.According to
Statistics, if not operating treatment, 90% aneurysm of thoracic aorta is dead in 5 years, and 3/4 abdominal aneurvsm is dead in 5 years.
Aorta pectoralis endovascular repair (thoracic endovascular aortic repair, TEVAR) therapeutic domain
Including a variety of masters such as hemotoncus, aneurysm of thoracic aorta and false aneurysm between dissection of aorta, aorta perforating ulcer, aorta wall
Artery distensibility lesion and Aortic surgery is postoperative or the secondary intracavitary therapy of TEVAR postoperative complications.On the other hand, certainly
The 1990s, report was the first using abdominal aorta endovascular repair (endovascular abdominal aortic
Repair, EVAR) treatment abdominal aneurvsm since, EVAR in worldwide rapidly promote come, EVAR because its wound is small,
The advantages such as operation and hospital stays are short, post-operative recovery is fast, average of operation periods case fatality rate and complication rate are low, in short 20 years
It rapidly develops, it has also become the treatment method of current abdominal aneurvsm first choice.
The more intervention therapeutic apparatus of application mainly includes balloon expandable stent and Self-expanded stent at present.Self-expanded stent
It is to apply more bracket in vascular interventional treatment at present, it is common to have closed loop bracket, the i.e. axial direction of bracket in Self-expanded stent
The advantages of peaks and troughs between two adjacent support units are all connected by connecting rod, closed loop bracket is metal coverage rate
It is larger, and have biggish radial support power, can uniform fold on vascular wall, prevent patch from falling off, but it is this design it is submissive
Property it is relatively poor, do not adapt to bending complex lesions blood vessel.Due to needing to intravascular stent in the application process of intravascular stent
It compressed, conveyed and is expanded, so intravascular stent must have good compressibility, conveying flexibility and expansion uniform
Property, this proposes very high requirement to material and the structure design of intravascular stent, and existing bracket cannot still realize this well
The perfect unity of a little technical indicators.
Utility model content
The technical problem to be solved by the present invention is in view of the drawbacks of the prior art, provide a kind of with good
The intravascular stent of the high-flexibility of compressibility, conveying flexibility and expansion uniformity.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of intravascular stent of high-flexibility, multiple ring holders including axial alignment, the ring holder by
The end to end formation of the support unit of multiple waveforms, the support unit include wave crest, trough, are connected between wave crest and trough
Wave bar, in two adjacent rings ring holder, between the wave crests and trough of multiple and different circle support units by first it is flexible even
Fitting connection, and first flexible connecting member also extends be wound at least one support unit formed second be flexibly connected
Part.
Further, in the intravascular stent of the high-flexibility, the wave of the support unit of preferably different in the axial direction circles
Length is identical, and corresponds in axial direction and arrange in column, and in two adjacent rings ring holder, first flexible connecting member is connected to
Between the wave crest and trough of two support units of axially distinct column.
Further, in the intravascular stent of the high-flexibility, preferably described first flexible connecting member is simultaneously at one
It is connected between the trough of the support unit of two adjacent columns in the wave crest and adjacent turn of support unit, to form the company of herringbone
Binding structure.
Further, in the intravascular stent of the high-flexibility, in preferably same circle ring holder, each trough
On be all connected with the first flexible connecting member, the first flexible connecting member is connected on the wave crest of part.
Further, in the intravascular stent of the high-flexibility, preferably described first flexible connecting member at least connects with it
The second flexible connecting member for connecing support unit adjacent column is continuously coupled.
Further, in the intravascular stent of the high-flexibility, preferably axially on, connection two adjacent rings support unit
The second flexible connecting member on first flexible connecting member and wherein a circle support unit is continuously coupled.
Further, in the intravascular stent of the high-flexibility, preferably axially on, connect two adjacent rings ring holder
The first flexible connecting member and wherein one circle ring holder on the second flexible connecting member be integral structure.
Further, in the intravascular stent of the high-flexibility, preferably axially on, the first of at least adjacent two column is flexible
Connector and the second flexible connecting member are the proximally integral structures to distal end.
Further, in the intravascular stent of the high-flexibility, the preferably described second flexible connecting member sequence spiral is twined
It is wound on support unit and there are spacing between every circle.
Further, in the intravascular stent of the high-flexibility, the preferably described spiral winding is wound clockwise or inverse
Hour hands winding.
Further, in the intravascular stent of the high-flexibility, the preferably described support unit includes soft by described second
Property connector winding winding support unit and the naked support unit that is not wound by the second flexible connecting member, winding support it is single
First and naked support unit is arranged alternately.
Further, in the intravascular stent of the high-flexibility, in preferably same circle ring holder, winding support is single
First and naked support unit is alternately repeated one circle of arrangement.
Further, in the intravascular stent of the high-flexibility, preferably in the axial direction, the winding support unit of difference circle
One column of arrangement are alternately repeated with naked support unit.
Further, in the intravascular stent of the high-flexibility, the preferably described winding support unit is flexible connecting member
The full winding support unit that the wave crest of one support unit, wave bar and trough are all wound；
Or the winding support unit be flexible connecting member by a support unit by wave crest be wound to wave bar or by
Trough is wound to the part winding support unit of wave bar.
Further, in the intravascular stent of the high-flexibility, preferably described first flexible connecting member and the second flexibility
Connector is respectively linear structure, strip structure or banded structure respectively.
Further, in the intravascular stent of the high-flexibility, the preferably described ring holder is high wave support unit
The first flexible connecting member, Gao Bozhi are connected with the wave crest of the height wave bracket of low wave support unit composition, low wave support unit
The wave crest of support unit is not connected to the first flexible connecting member.
Further, in the intravascular stent of the high-flexibility, preferably described first flexible connecting member is in different circles branch
It supports between the wave crest and trough of unit through knotting or canoe connection.
Further, in the intravascular stent of the high-flexibility, the preferably described bracket further includes the overlay film of tubulose, described
Ring holder axially sequentially arranges and is fixed on the overlay film inner surface or/and outer surface.
Further, in the intravascular stent of the high-flexibility, the preferably described ring holder is high wave support unit
With the height wave bracket of low wave support unit composition, the height wave bracket is fixed on overlay film outer surface or inner surface, low wave branch
Support unit is fixed with overlay film, is not fixed between the wave crest and overlay film of high wave support unit.
Further, in the intravascular stent of the high-flexibility, the preferably described overlay film includes that inner film coating and outer layer cover
Film, the ring holder are arranged between inner film coating and outer film coating.
The utility model provides a kind of bracket, multiple ring holders of axial alignment, multiple and different circle annular braces
It is connected between the wave crest and trough of the support unit of frame by the first flexible connecting member, and first flexible connecting member also extends
It is wound at least one support unit and forms the second flexible connecting member.Due to flexible even by the first flexible connecting member and second
The connection of fitting, then bracket is flexible after expansion, and compliance is good, and entire bracket has good compressibility, conveying submissive
Property and expansion uniformity.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is one bracket deployed configuration schematic diagram of the utility model embodiment；
Fig. 2 is the structural schematic diagram of one ring holder of the utility model embodiment；
Fig. 3 is the structural schematic diagram of one bracket of the utility model embodiment；
Fig. 4 is partial enlarged view at I in Fig. 1；
Fig. 5 is the structural schematic diagram of two bracket of the utility model embodiment；
Fig. 6 is the structural schematic diagram of three bracket of the utility model embodiment；
Fig. 7 is the structural schematic diagram of four bracket of the utility model embodiment；
Fig. 8 is the structural schematic diagram of five bracket of the utility model embodiment；
Fig. 9 is the structural schematic diagram of six bracket of the utility model embodiment；
Figure 10 is the partial enlarged view of the utility model embodiment six.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed
Illustrate specific embodiment of the present utility model.
" proximal end " described in the utility model refers to along blood flow direction, close to the bracket of patient's heart or the portion of bracket component
Point, and " distal end " refers to far from the bracket of patient's heart or the part of bracket component.
Embodiment one
A kind of intravascular stent of high-flexibility, multiple ring holders 100 including axial alignment, the ring holder
100 by multiple waveforms the end to end formation of support unit 110, the support unit 110 include wave crest 111, trough 113, even
Connect the wave bar 112 between wave crest 111 and trough 113, in two adjacent rings ring holder 100, multiple and different circle support units
It is connected between 110 wave crest 111 and trough 113 by the first flexible connecting member 210, and first flexible connecting member 210 is also
Extension, which is wound at least one support unit 110, forms the second flexible connecting member 220.
The bracket of the present embodiment is the bare bracket of not overlay film, has multi-ring annular support frame 100 proximally to arrive distal end successively
The ring holder 100 of parallel interval arrangement, two adjacent rings is connected by multiple first flexible connecting members 210, forms tubular knot
The bracket of structure.The quantity of ring holder 100 is 16 circles in the present embodiment one, and the quantity of the first flexible connecting member 210 is 15 circles,
Two adjacent rings ring holder 100 is spaced between 0.3~0.5mm.
It is preferred that the bracket is the closed loop configuration and open loop structure for being spaced apart from each other setting, the closed loop configuration is finger ring shape branch
The wave crest that the part support unit 110 of support 100 passes through the first flexible connecting member 210 and axially adjacent ring holder 100
Or trough is connected to form closed diamond structure unit；Open loop structure refers to the part support unit 110 of ring holder 100
Wave crest or trough do not pass through the first flexible connecting member 210 and are connected with axially adjacent ring holder 100, described not connected
Wave crest or trough do not limited, the wave crest of open loop structure that bracket does not fetter when bending can do adaptability with bracket bent
Activity.
As shown in Fig. 2, ring holder 100 is the main part of entire intravascular stent, each ring holder 100 is
One ring structure, by the end to end formation of support unit 110, support unit 110 includes wave crest 111 and trough 113, in wave crest
It is wave bar 112 between 111 and trough 113.From wave height, the ring holder 100 includes that all support units 110 are wave
High identical contour wave support frame or support unit 110 are the different height wave support frame of wave height, in the same intravascular stent
In, a type of ring holder 100 can be only included, can also include two kinds simultaneously and mix the bracket to be formed,
The present embodiment is contour wave support frame.The ring holder 100 of the present embodiment is supported by the multiple Z-shaped or sinusoidal contour wave formed
Frame, the trough 113 that each Z-shaped or sine wave support unit 110 has 1 wave crest 111 and 1 adjacent, wave crest 111 and adjacent
There is 1 wave bar 112 between trough 113.Every circle ring holder 100 is woven using a super-elasticity titanium-nickel wire, titanium-nickel wire
String diameter is thinner, can be woven in the present embodiment one using the titanium-nickel wire of 0.2mm diameter between 0.15~0.3mm, it is Z-shaped or
110 quantity of support unit of sine wave is 8, and the wave height of ring holder 100 is 5.5mm.
It is said in shape from bracket, it is identical isometrical that the bracket of the utility model can be every 100 diameter of circle ring holder
Bracket is also possible to the different non-isometrical bracket of 100 diameter of ring holder.It is flexibly connected in non-isometrical bracket and isometrical bracket
The structure and connection type of part 200 are identical, and the present embodiment is described in detail by taking isometrical bracket as an example:
For isometrical bracket, support unit 110 is divided to for two kinds of situations, and one is the support units of circles different in the axial direction
110 wavelength is identical, and in axial different circle ring holders 100, support unit 110 can axially correspond to arrangement, i.e. axis
It is corresponded to adjacent wave crest and wave crest, trough and trough, can also be staggered, i.e., axial two neighboring support unit
A 110 interlaced fixed spacings, such as the axial wave for corresponding to another support unit 110 of wave crest 111 of a support unit 110
Bar 112 forms helical arrangement.The wavelength of the support unit 110 of the preferably different in the axial direction circles of the utility model is identical and axial
Adjacent wave crest is arranged in column with wave crest, trough and trough one-to-one correspondence, described in such two adjacent rings ring holder 100
First flexible connecting member 210 is connected between the wave crest 111 and trough 113 of two support units 110 of axially distinct column.
Another kind is that the wavelength of the support unit 110 of circles different in the axial direction is not identical, also may make axial different circles
In ring holder 100, support unit 110 can axially correspond to arrangement, such as a corresponding another circle of one support unit 110 of circle
Two or more support units 110, can also be staggered.
In the utility model, the flexibility of the first flexible connecting member 210 and the second flexible connecting member 220 refers to can be any curved
Bent, torsion, cannot stretch or the structure of micro-stretching in the axial direction, preferably the first flexible connecting member 210 and the second flexible connecting member
220 be respectively linear structure, strip structure or banded structure.Can also preferably the first flexible connecting member 210 and second it is soft
Property connector 220 be on axial one of continuous winding between multiple wave crests 111 and trough 113, in different supporting unit 110
Linear structure, strip structure or banded structure.In linear structure, strip structure or banded structure, preferred linear structure.
First flexible connecting member 210 is the wave crest 111 and trough for being connected to axially adjacent two circles support unit 110
Between 113, first flexible connecting member 210 is specifically the trough 113 and adjacent turn adjacent column of 110 distal end of support unit
It being connected between the wave crest 111 of 110 proximal end of a hithermost support unit, connection type can be to be connected by knot tying fashion,
It is also possible to connect by canoe.Knot tying fashion is that 210 both ends of the first flexible connecting member knot be fixed on trough respectively
113 and wave crest 111 on.Canoe is that first flexible connecting member 210 is wrapped on trough 113 and wave crest 111.In wave crest
The length of the first flexible connecting member 210 between 111 and trough 113 determines as needed.
It can be between first flexible connecting member 210 and the second flexible connecting member 220 and be respectively independently arranged, i.e., first is flexible
210 both ends of connector winding or knot is fixed on wave crest 111 and trough 113, the winding of the both ends of the second flexible connecting member 220 or
Knotting is fixed on support unit 110.It is also possible to the first flexible connecting member 210 and the second continuously setting of flexible connecting member 220,
It is preferred that the first flexible connecting member 210 and the second flexible connecting member 220 links together or integral structure.Integral structure connection also divides
For two kinds of situations: one is the first flexible connecting members 210 and same support unit 110 between a pair of of wave crest 111 and trough 113
The second flexible connecting member 220 be structure as a whole, another kind is that the first flexible connecting member 210 and the second flexible connecting member 220 exist
On axial between multiple wave crests 111 and trough 113, in different supporting unit 110 continuous winding, particularly preferably connecting
First flexible connecting member 210 of the support unit 100 of axially adjacent two circle and the second flexible connecting member 220 for winding a wherein circle
It is structure as a whole.
In a further embodiment, the first flexible connecting member 210 at least and is wrapped in its adjacent turn and adjacent two are disbursed from the cost and expenses
The second flexible connecting member 220 for supportting the column in unit is continuously coupled, described continuously coupled to refer to first flexible connecting member
210 and second flexible connecting member 220 is structure as a whole or first flexible connecting member 210 and described second flexible
Connector knot or others by way of link together, have the pulling force mutually pulled before the two, in axial direction, connect two
The first flexible connecting member 210 for enclosing support unit 100 supports list in adjacent column by the second continuously coupled flexible connecting member 220
Being fastened in member can further strengthen the integrally-built stability of bracket.In further embodiment
In, in axial direction, connect two adjacent rings ring holder the first flexible connecting member 210 and wherein one enclose on ring holder the
Two flexible connecting members 220 are integral structures, such as linear, strip or banded structure.
The first flexible connecting member 210 between a pair of of wave crest 111 and trough 113, can be fastened or knot respectively
It is fixed on wave crest 111 and trough 113, the length of the first flexible connecting member 210 between wave crest 111 and trough 113 is according to wanting
Bending degree and bracket itself performance is asked to determine, the utility model is not construed as limiting, preferably connection holding shaft multiple supports upwards
Unit 110 is corresponding, does not make torsion or radial deflection, and integral support is kept to be cylindrical in shape structure.
For the second flexible connecting member 220 being arranged on 110 wave bar 112 of support unit, according to coiling length, there are many
Embodiment can be divided into full winding support unit and part winding support unit, wherein winding support unit is entirely to prop up entirely
Support unit 110 is all wound with the second flexible connecting member 220, and part winds support unit and is only partially wound with the second flexibility even
Fitting 220.I.e. preferably the winding support unit 101 is the second flexible connecting member 220 by the wave crest of a support unit 110
111, the full winding support unit that wave bar 112 and trough 113 are all wound；Or it can also the preferred winding support unit
One support unit 110 is wound to wave bar 112 by wave crest 111 or is twined by trough 113 by 101 for the second flexible connecting member 220
Support unit is wound around to the part of wave bar 112.Second flexible connecting member, 220 sequence on winding support unit 101
It is spirally wound on support unit 110 and there are spacing between every circle.The spiral winding is for wound clockwise or counterclockwise
Winding.
Winding support unit 101 setting advantage be: by wind support unit 101 setting can make it is axially adjacent
Two circle support frames 100 between by continuous first flexible connecting member 210 and the second flexible connecting member 220 connect into one it is whole
Body, meanwhile, it is capable to by way of winding, across part wave crest 111, so that part wave crest 111 is not strapped in the first flexibility even
On fitting 210, thus, bracket generally comprises the bare bracket unit 102 that part can be move freely, while guaranteeing the stabilization of bracket
Property and flexibility.Continuously be fastened the continuity that can guarantee between axially adjacent two circles ring holder 100, Jin Erbao
The continuity for demonstrate,proving entire bracket enhances the radial support intensity of bracket and the stability of bracket integrated connection.
In first flexible connecting member 210 of circle being arranged between two circle ring holders 100, the first flexible connecting member
210 arrangements be also there are many embodiment, such as same circle the connection of the first flexible connecting member 210 direction it is identical, i.e., one circle
Only trough 113 connection adjacent with left side or trough 113 only adjacent with right side are connect wave crest 111 in ring holder 100；
It can also be the wave crest that the direction of the first flexible connecting member 210 connection of same circle is different, i.e., in one circle ring holder 100
111 can be adjacent with left side or adjacent right side trough 113 connect；It is also possible to first flexible connecting member 210 to exist simultaneously
It is connected between the trough 113 of the support unit 110 of two adjacent columns in the wave crest 111 and adjacent turn of one support unit 110, with
The connection structure of herringbone is formed, which can to connect more stable, prevent two adjacent rings ring holder 100
Between formed torsion and offset.
Since part support unit 110 is wound with the second flexible connecting member 220, then the support unit 110 includes by institute
State the winding support unit 101 of the second flexible connecting member 220 winding, the naked support list not wound by the second flexible connecting member 220
Member 102；Winding support unit 101 and naked support unit 102 are arranged alternately, then there are many arrangement modes of support unit 110
Embodiment: it in same circle ring holder 100, winds support unit 101 and naked support unit 102 is alternately repeated arrangement one
Circle.In the axial direction, the winding support unit 101 of different circles and naked support unit 102 are alternately repeated one column of arrangement.Specifically, originally
Alternating in utility model herein refers to that winding support unit 101 and naked support unit 102 repeat to arrange according to certain rule.I.e.
In same circle ring holder 100, the winding support unit 101 and naked support unit 102 replace according to certain arranging rule
One circle of arrangement is repeated, arranging rule refers to the alternating rule between winding support unit 101 and naked support unit 102, can be
1-4 winding support unit 101 is combined with 1-4 naked support units 102 repeat arrangement, such as: a winding support is single
Member 101 and a naked alternating of support unit 102, a winding support unit 101 and two naked alternatings of support unit 102, two
Wind support unit 101 and a naked support unit 102 alternately etc., arranging rule bracket flexibility according to actual needs,
The conditions such as support force determine that the utility model is not construed as limiting.
In the present embodiment, it is all connected with the first flexible connecting member 210 on each trough 113, is connected on part wave crest 111
One flexible connecting member 210, then this kind of arrangement mode of the first flexible connecting member 210 makes in same circle waveform support frame 100,
It winds support unit 101 and naked 102 alternate intervals of support unit is arranged.
Arrangement for support unit 110 between different circles is also to follow alternately rule: the winding support of difference circle
Unit 101 and naked support unit 102 are alternately repeated arrangement one according to arranging rule and arrange.Also according to flexibility requirement, Ke Yiren
Meaning setting alternately rule, can be axial upper 1-4 winding support unit 101 and combines with a naked support units of 1-4 and repeated
Arrangement.Such as: in the axial direction, a winding support unit 101 and a naked alternating of support unit 102, a winding support list
Member 101 and two naked alternatings of support unit 102, two winding support units 101 and a naked alternating of support unit 102 etc..
In the axial direction, not corresponding support unit 110 can also deviate certain distance in the circumferential, be formed according to above-mentioned alternately rule
It is spiral to be arranged alternately.
In the present embodiment, as shown in figure 3, ring holder 100 passes through the first flexible connecting member 210 and the second flexible connection
Part 220 keeps axial connection, 220 integral structure of the first flexible connecting member 210 and the second flexible connecting member.The first circle annular in proximal end
On support frame 100, the second flexible connecting member 220 is clockwise since the trough 113 of ring holder 100 by way of winding
Along wave bar 112, wave crest 111 is wound to next trough 113, and then the first winding downwards of flexible connecting member 210 passes through second
The neighbouring wave crest 111 of ring holder 100 is enclosed, then again upwards, the second flexible connecting member 220 winds first circle ring holder
100 trough 113.It is recycled with this, winds the first flexible connecting member 210 at interval of a wave crest 111 on ring holder 100,
First flexible connecting member 210 and the second flexible connecting member 220 return on ring holder 100 before initial position after a circle
One 113 position of trough.From relative to 100 winding position the latter of first circle ring holder on second circle ring holder 100
113 position of trough starts to wind, and canoe is identical as first circle canoe, until distal end circle second from the bottom.Every circle first is soft
Property connector 210 and the second flexible connecting member 220 be that an overall structure is wound, first is flexible used in the utility model
Connector 210 and the second flexible connecting member 220 are using the linear structure of high molecular material or metal material, preferably PET line, PP
Line, PTFE line, for diameter between 0.02~0.05mm, the diameter that this example one uses is the PTFE line of 0.03mm, or can also
It is combined using thinner memory alloy wire such as nitinol alloy wire or thinner multiple thread strands, the combinations of the multiple thread strands can be with
It is combination, the combination of metal material or the combination of high molecular material and metal material between high molecular material.The one of distal end
Ring holder is enclosed other than part wave crest is connected with the first flexible connecting member 210, support unit itself is soft without extending second
Property connector 220, be naked support unit 102.
As shown in figure 4, the first flexible connecting member 210 and the second flexible connecting member 220 are in a manner of winding in the present embodiment
It is wrapped on ring holder 100, the first flexible connecting member 210 is wound down from the trough 113 of Shang Yiquan ring holder 100
Cross it is next circle ring holder 100 wave crest 111, then up in wraparound one circle ring holder 100 113 position of trough,
Wave crest 111,113 position of trough winding circle number are 2~4 circles, or knot and fix in wave crest 111 and 113 position of trough.
In the present embodiment, the trough 113 of two adjacent rings ring holder 100 is located on same axis in axial direction, i.e., axially
The trough 113 of two adjacent rings ring holder 100 is axial corresponding with wave crest 111, the wave of axially adjacent two circles ring holder 100
Peak 111 and wave crest 111 are opposite, and one wave crest 111 in the first flexible connecting member 210 interval, which is fastened, connects two adjacent rings annular branch
Support 100 forms a stable nearly diamond shape closed loop configuration, stable closed loop knot between two adjacent rings ring holder 100
Structure can guarantee the radial and axial stability of bracket entirety, while further include several naked support units for not fettering wave crest 111
102, it can guarantee certain activity space of ring holder 100, the flexibility of reinforced support；Another aspect two adjacent rings ring
Shape support frame 100 is connected by the first flexible connecting member 210 and the second flexible connecting member 220, is conducive to the bending for improving bracket
Flexibility.
Embodiment two
The present embodiment is improvement on the basis of example 1.
As shown in figure 5, the ring holder 100 of the utility model embodiment is contour wave bracket, supported by multi-ring annular
Frame 100 and multi-turn the first flexible connecting member 210 and the second flexible connecting member 220 are formed by connecting.The embodiment and embodiment one it
Between difference be: winding support unit 101 and naked support unit 102 alternately rule it is different from embodiment one.In same circle, two
A winding support unit 101 and a naked support unit form alternately rule, one circle of arrangement；In axial direction, two winding supports are single
Member 101 and a naked support unit form alternately rule.First flexible connecting member 210 and the second flexible connecting member 220 continuously twine
It is spaced a support unit 110 after two support units 110, then winds, is i.e. a wave crest 111 and similar two troughs
113 connections, two wave crests 111 of midfeather are not fettered by the first flexible connecting member 210, and 111 quantity of wave crest not fettered is more than
Embodiment one further enhances the flexibility of bracket.
As shown in figure 5, in embodiment two proximal end first circle ring holder 100 from the trough 113 of initial position winding second
Flexible connecting member 220 forms a full winding support unit, then to trough 113, two support units 110 of continuous winding clockwise
Pass through the wave crest of second ring holder 100 in the first flexible connecting member 210 that 113 position of trough winds downwards another circle afterwards
111 positions, then wind to turn one's head at the trough 113 for being spaced a wave crest 111 upwards and enclose the support unit of ring holder 100
110, continue 113 position of trough that wound clockwise by this method goes back to initial position, to knot and fix.Second circle ring holder
It is wound since relative to 113 position of the latter trough of 100 initial position coiling of first circle ring holder on 100.
Remaining structure is the same as example 1, and details are not described herein.
Embodiment three
The present embodiment is improvement on the basis of example 1.
As shown in fig. 6, the difference between the utility model embodiment three and embodiment one is, ring holder 100 is
There are two types of, contour wave support frame and height wave support frame.Proximal end first circle is contour wave support frame, remaining is height wave support frame.
Wherein, height wave support frame is that one high wave support unit and a low wave support unit alternately form.It is to be appreciated that at it
In his embodiment, it is also an option that two or more high wave support units and a low wave support unit alternating or a height
Wave support unit and two or more low wave support units alternating or two or more high wave support units and two or more
Low wave support unit alternating.
As shown in fig. 6, proximal end first circle ring holder 100 is contour wave support frame in embodiment three, from the second ring shape
Support frame 100 starts as height wave support frame axial alignment.In height wave support frame, high wave support unit and low wave support unit
Difference in height between 0.5~1mm.The ring holder 100 is the height that high wave support unit and low wave support unit form
Low wave bracket, the wave crest 111 of low wave support unit connect the first flexible connecting member 210, high wave support unit wave crest 111 not
Connect the first flexible connecting member 210.
Specifically, the winding of the second flexible connecting member 220 is the trough from 100 initial position of first circle ring holder
113 windings, continuous winding clockwise cross wave bar 112, wave crest 111, downward first flexible connecting member at next trough 113
210 are wrapped over the wave crest 111 of the low wave support unit 110 of the second circle ring holder 100, the first flexible connecting member 210 again to
Upper winding, which is turned one's head, encloses the trough 113 of ring holder 100, winds back the previous trough 113 of initial position with this clockwise, beats
Knot is fixed.From relative to 100 113, winding position the latter trough of first circle ring holder on second circle ring holder 100
It sets and starts to wind the second flexible connecting member 220, canoe is the same as example 1.In the present embodiment, in axial direction, annular brace
Frame 100 is staggered using high wave support unit 110 and low wave support unit 110, encloses from second, and high wave support unit is naked
Support is single, and 102, the second flexible connecting member 220 is not wound, expands the bending angle of ring holder 100, is improved submissive
Property.
Remaining structure is the same as example 1, and details are not described herein.
Example IV
The present embodiment is improvement on the basis of example 1.
As shown in fig. 7, the difference between the present embodiment and embodiment one is, winds support unit 101 and naked support is single
Alternately rule is different from embodiment one for member 102.In same circle, two winding support units 101 replace a naked support unit
102, followed by an alternately winding support unit 101, a last alternately naked support unit 102, according to such alternately rule
Rule, one circle of arrangement；In axial direction, for first row in addition to first is winding support unit 101, remaining is a naked support unit 102
Alternately two winding support units 101, form alternately rule, and adjacent secondary series is two winding support unit 101 alternatings one
A naked support unit 102 forms alternately rule.Third column are that a naked support unit 102 replaces two winding support units 101,
Form alternately rule；The 4th same first row of column, in the 5th column except first for it is naked around support unit 102 in addition to, remaining be one
It winds support unit 101 and replaces two naked support units 102；The 6th same first row of column, the 7th same secondary series of column, with this rule row
Cloth.First flexible connecting member 210 connect a wave crest 111 connect with similar two troughs 113, midfeather one or two
Wave crest 111 is not fettered by flexible connecting member 200.In i.e. same circle ring holder 100, is all connected on each trough 113
One flexible connecting member 210 connects the first flexible connecting member 210 on part wave crest 111.
As shown in fig. 7, proximal end first circle ring holder 100 is flexible even from 113 position of trough winding second in example IV
Fitting 220, continuous winding clockwise cross two wave crests 111, are wrapped over the second circle annular brace downwards at second trough 113
The wave crest 111 of frame 100, then it is wound down the first flexible connecting member 210 of eight words upwards, it turns one's head and encloses ring holder 100
Trough 113, then the second flexible connecting member of wound clockwise 220 is to a waveform of ring holder 100, at trough 113 to
Lower winding 210 to the second coil support wave crest 111 of the first flexible connecting member, then the first flexible connecting member 210 of winding is turned one's head circle upwards
The trough 113 of ring holder 100 winds back the trough 113 of initial position clockwise with this, knots and fixes.Second ring shape
Winding first is flexible since relative to 100 winding position the latter trough of first circle ring holder, 113 position on support frame 100
Connector 210 and the second flexible connecting member 220, mode is identical as first circle.The wave crest 111 and 113 quantity of trough not fettered are more than
Embodiment one further enhances the flexibility of bracket.
Remaining structure is the same as example 1, and details are not described herein.
Embodiment five
The present embodiment is improvement on the basis of example 1.
As shown in figure 8, in the intravascular stent of the high-flexibility, other than the bare bracket that ring holder 100 forms,
The bracket further includes the overlay film 300 of tubulose, and the ring holder 100 is axial sequentially to arrange and be fixed on the overlay film 300
Inner surface or/and outer surface.
As shown in figure 8, the present embodiment is two layers of overlay film 300, the overlay film 300 includes inner film coating and outer film coating, is
Two tubulose overlay films 300 are set in together to form inner film coating and outer film coating.The setting of ring holder 100 is covered in internal layer
Between film and outer film coating.
As shown in figure 8, inner film coating integral structure in a tubular form, is located at bracket internal layer, is used to support the pipe of entire bracket
The effect of shape structure.The also integral structure in a tubular form of outer film coating 302, is located at bracket outermost layer, is covered on ring holder
100 and first flexible connecting member 210 and second flexible connecting member 220 outer surface.It is ring holder 100, described
First flexible connecting member 210 and second flexible connecting member 220 are clamped between them by inner film coating and outer film coating,
So as to maintain the overall structure of bracket, for the stability for further increasing supporting structure entirety, inner film coating is covered with outer layer
Film can be integrated by the method for heat seal.300 material of overlay film is using polymeric membranes such as PET or ePTFE in the present embodiment,
Inner film coating and outer film coating can be used 1-5 layers of polymeric membrane and be combined, such as is compounded to form respectively by 3 film structures.
When first flexible connecting member 210 and second flexible connecting member 220 are using PET line, PP line, PTFE grade height molecular line
When material, after hot pressing, first flexible connecting member 210 and 220 energy of the second flexible connecting member on the support frame is wound
Enough to merge with polymeric membrane more preferable, overlay film frame overall structure is more stable.
The structure of ring holder 100 and first flexible connecting member 210 and second flexible connecting member 220 is the same as real
Example one is applied, details are not described herein.
Embodiment six
The present embodiment is improvement on the basis of embodiment three.
As shown in figure 9, the present embodiment is to be externally provided with overlay film 300 in three bare bracket of embodiment.It is preferred that the annular brace
Frame 100 is the height wave bracket that high wave support unit and low wave support unit form, and the height wave bracket is fixed on overlay film 300
Inner surface or outer surface, low wave support unit and overlay film 300 are fixed, the wave crest 111 and overlay film 300 of high wave support unit 110 it
Between be not fixed.
It is preferred that bracket includes ring holder 100, first flexible connecting member 210 and second flexible connecting member
220, inner film coating 301 and outer film coating 302；The ring holder 100, first flexible connecting member 210 and described
Two flexible connecting members 220 are located at bracket middle layer, between inner film coating 301 and outer film coating 302.The embodiment and embodiment five it
Between difference be that the structure of bare bracket is height wave structure, and high wave wave crest 111 is not wrapped up by outer film coating 302.
The integral structure in a tubular form of inner film coating 301 is located at 100 inside of ring holder.As shown in Figure 10, outer film coating
The multilayer cyclic structure of 302 axially spaced-aparts arrangement, each circle outer film coating 302 is since the dwarf waves peak 111 of ring holder 100
Package, until the trough 113 of next ring holder 100, the wave crest 111 of Gao Bo is exposed.When bracket bent, not by
The wave crest 111 of constraint is without limitation on the flexion of overlay film frame, therefore 300 mode of overlay film in the present embodiment improves bracket
Axial flexibility.
Remaining structure is identical as embodiment three, and details are not described herein.
Claims (20)
1. a kind of intravascular stent of high-flexibility, multiple ring holders including axial alignment, the ring holder is by more
The end to end formation of the support unit of a waveform, the support unit include wave crest, trough, are connected between wave crest and trough
Wave bar, which is characterized in that in two adjacent rings ring holder, pass through the between the wave crests and trough of multiple and different circle support units
The connection of one flexible connecting member, and first flexible connecting member also extends that be wound at least one support unit formation second soft
Property connector.
2. the intravascular stent of high-flexibility according to claim 1, which is characterized in that the support list of circles different in the axial direction
The wavelength of member is identical, and corresponds in axial direction and arrange in column, in two adjacent rings ring holder, first flexible connecting member
It is connected between the wave crest and trough of two support units of axially distinct column.
3. the intravascular stent of high-flexibility according to claim 2, which is characterized in that first flexible connecting member is simultaneously
It is being connected between the trough of the support unit of two adjacent columns in the wave crest and adjacent turn of one support unit, to form eight words
The connection structure of shape.
4. the intravascular stent of high-flexibility according to claim 1, which is characterized in that in same circle ring holder, often
It is all connected with the first flexible connecting member on one trough, the first flexible connecting member is connected on the wave crest of part.
5. the intravascular stent of high-flexibility according to claim 1, which is characterized in that first flexible connecting member is at least
The second flexible connecting member for being connected thereto support unit adjacent column is continuously coupled.
6. the intravascular stent of high-flexibility according to claim 5, which is characterized in that in axial direction, connect two adjacent rings branch
It supports the first flexible connecting member of unit and wherein the second flexible connecting member on a circle support unit is continuously coupled.
7. according to the intravascular stent of high-flexibility as claimed in claim 6, which is characterized in that in axial direction, connection two adjacent rings annular
The second flexible connecting member on first flexible connecting member of support frame and wherein a circle ring holder is integral structure.
8. according to the intravascular stent of high-flexibility as claimed in claim 7, which is characterized in that in axial direction, the of at least adjacent two column
One flexible connecting member and the second flexible connecting member are the proximally integral structures to distal end.
9. the intravascular stent of high-flexibility according to claim 1, which is characterized in that the second flexible connecting member sequence
It is spirally wound on support unit and there are spacing between every circle.
10. the intravascular stent of high-flexibility according to claim 9, which is characterized in that the spiral winding is clockwise
Winding or wrapped anti-clockwise.
11. the intravascular stent of high-flexibility according to claim 1, which is characterized in that the support unit includes by institute
The naked support unit stating the winding support unit of the second flexible connecting member winding and not wound by the second flexible connecting member, twines
It is arranged alternately around support unit and naked support unit.
12. the intravascular stent of high-flexibility according to claim 11, which is characterized in that in same circle ring holder,
Winding support unit and naked support unit are alternately repeated arrangement.
13. the intravascular stent of high-flexibility according to claim 11, which is characterized in that in the axial direction, difference circle twines
One column of arrangement are alternately repeated around support unit and naked support unit.
14. the intravascular stent of high-flexibility according to claim 11, which is characterized in that the winding support unit is soft
The full winding support unit that property connector all winds the wave crest of a support unit, wave bar and trough；
Or the winding support unit is that a support unit is wound to wave bar by wave crest or by trough by flexible connecting member
It is wound to the part winding support unit of wave bar.
15. the intravascular stent of high-flexibility according to claim 1, which is characterized in that first flexible connecting member and
Second flexible connecting member is respectively linear structure, strip structure or banded structure respectively.
16. the intravascular stent of high-flexibility according to claim 1, which is characterized in that the ring holder is Gao Bo
The height wave bracket of support unit and low wave support unit composition, the first flexible connection of wave crest connection of low wave support unit
Part, high wave support unit wave crest be not connected to the first flexible connecting member.
17. the intravascular stent of high-flexibility according to claim 1, which is characterized in that first flexible connecting member exists
Pass through knotting or canoe connection between the wave crest and trough of difference circle support unit.
18. the intravascular stent of high-flexibility described in -17 any one according to claim 1, which is characterized in that the bracket is also
Overlay film including tubulose, the ring holder axially sequentially arrange and are fixed on the overlay film inner surface or/and outer surface.
19. the intravascular stent of high-flexibility according to claim 18, which is characterized in that the ring holder is Gao Bo
The height wave bracket of support unit and low wave support unit composition, the height wave bracket are fixed on overlay film outer surface or interior table
Face, low wave support unit are fixed with overlay film, are not fixed between the wave crest and overlay film of high wave support unit.
20. the intravascular stent of high-flexibility according to claim 19, which is characterized in that the overlay film includes inner film coating
And outer film coating, the ring holder are arranged between inner film coating and outer film coating.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821240872.5U CN209285856U (en) | 2018-08-02 | 2018-08-02 | A kind of intravascular stent of high-flexibility |
| PCT/CN2019/098375 WO2020024936A1 (en) | 2018-08-02 | 2019-07-30 | Highly flexible stent |
| US17/165,264 US11712354B2 (en) | 2018-08-02 | 2021-02-02 | Highly flexible stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821240872.5U CN209285856U (en) | 2018-08-02 | 2018-08-02 | A kind of intravascular stent of high-flexibility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209285856U true CN209285856U (en) | 2019-08-23 |
Family
ID=67651562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821240872.5U Active CN209285856U (en) | 2018-08-02 | 2018-08-02 | A kind of intravascular stent of high-flexibility |
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| Country | Link |
|---|---|
| CN (1) | CN209285856U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11608632B2 (en) * | 2019-01-28 | 2023-03-21 | William E. Smith | Pre-stressed sinusoidal member in assembly and applications |
| US11959277B1 (en) * | 2019-01-28 | 2024-04-16 | William E. Smith | Pre-stressed sinusoidal member in assembly and applications |
-
2018
- 2018-08-02 CN CN201821240872.5U patent/CN209285856U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11608632B2 (en) * | 2019-01-28 | 2023-03-21 | William E. Smith | Pre-stressed sinusoidal member in assembly and applications |
| US11959277B1 (en) * | 2019-01-28 | 2024-04-16 | William E. Smith | Pre-stressed sinusoidal member in assembly and applications |
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