CN104490500B - Chain type coronary stent suitable for coronary artery tortuosity angulation lesion - Google Patents
Chain type coronary stent suitable for coronary artery tortuosity angulation lesion Download PDFInfo
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- CN104490500B CN104490500B CN201410827531.8A CN201410827531A CN104490500B CN 104490500 B CN104490500 B CN 104490500B CN 201410827531 A CN201410827531 A CN 201410827531A CN 104490500 B CN104490500 B CN 104490500B
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Abstract
The invention relates to a chain type coronary stent suitable for coronary artery tortuosity angulation and particularly lesion accompanied with vascular calcification. The stent consists of a plurality of closed waveform ring-shaped units which form a cylindrical structure; axial connection in the movement direction of a guide wire is realized between the ring-shaped units by connecting assemblies; the connecting assemblies comprise rigid connecting assemblies and elastic connecting assemblies; the stent adopts every two to four ring-shaped units to form one unit group; the adjacent ring-shaped units in each unit group are connected by the rigid connecting assemblies; the unit groups are connected by the elastic connecting assemblies. According to the stent disclosed by the invention, by arranging the elastic connecting assemblies between the ring-shaped units, higher passing ability is realized under the condition of not changing the thickness between each two ring-shaped units; moreover, the characteristic requirements of radial intensity, fatigue durability, trackability, propelling movement, perspectivity, elastic return and the like of the stent are kept.
Description
Technical field
The invention belongs to medical intervention consumptive material field, it is applied to the tortuous angulation of coronary artery especially more particularly to one kind
Chain type coronary artery bracket with angiosteosises pathological changes.
Background technology
Percutaneous coronary intervention (pci) (percutaneous coronary intervention, pci), refers to careful
The narrow or even inaccessible coronary artery tube chamber of microcatheter technology dredging, thus improve the Therapeutic Method of the blood perfusion of cardiac muscle.Wherein,
Level in patients after coronary artery stenting is a kind of new Minimally Interventional Therapy technology, and this technology is that the pathological changes sending into support in arteria coronaria are narrow
Position, expands the metal rack of fenestral fabric by carrying out pressurizeing to stent delivery system, so that support is supported narrow
Pathological changes arteria coronaria, by press blood vessel wall on speckle expand inner chamber diameter it is ensured that its implantation position intravascular space unobstructed,
Thus effectively avoiding blood vessel narrow once again.
It is presently used for the support of coronary intervention, can be exposed metal it is also possible to have treatment in its outer application
Agent and/or biocompatible materialses, to produce more targetedly beneficial effect, such as reduce inflammation, reduce to greatest extent
Narrow etc..From the angle of Clinical practice, a kind of preferable coronary artery bracket design, metal coverage rate, submissive should be taken into full account
Property, radial support power, axial cripetura rate, the axial key design parameter such as biography rate performance and x-ray, mri visuality.
The shape of existing coronary artery bracket is all almost that equal diameter is cylindrical, by using laser beam cutting pipe in metal
Formed on pipe.This metal tube is made up of biocompatible materialses, for example rustless steel, cochrome, tantalum, platinum etc..Then clear
This cut pipe clean, heat treated simultaneously electroplates polishing.The support completing is installed on balloon catheter by compression joint technique.
The support being installed in supravasal curling is directed to disease location (blocking or narrow inner chamber), in disease location, leads to
Cross using hydraulic pressure come to airbag aeration, thus support is radially extended to the diameter of needs, speckle is pressed by the radially expanded of support
It is depressed into blood vessel wall, thus removing the restriction of the blood flow in blood vessel, then, air bag deflation being reduced and incites somebody to action by removing hydraulic pressure
It is from taking out in the patient.In whole process of expansion, timbering material reaches plastic deformation, and therefore this support will not rebound it
Original-shape and in the lumen holding expansion state.
In order to bear the pressure of blood vessel applying, the supporting structure of support should have enough radial strengths and fatigue is strong
Degree is it should intensive enough deviate from prevention speckle.For the ease of implantation, support should have radiation impermeability in need.China
Patent cn201194854y discloses a kind of coronary artery bracket, identical with numerous coronary artery brackets of the prior art, described support
It is also to be made up of the waveform annular unit of some closures, between described each annular unit, shape is connected by fixedly connected part
Become cylindric entirety.The coronary artery bracket of Clinical practice all has akin structure therewith, small difference be also only that in view of
Requirement to support radial strength is different and adopt waveform cellular construction of different shapes.Above-mentioned cylindrical structural
Frame has substantially met the demand of current clinic percutaneous coronary intervention (pci), but the intervention for some specific pathological changes is controlled
Treat, then there is significant limitation.
Coronary artery is tortuous to be a kind of vascular malformation state, is a kind of anatomical variation coronarius, mainly crown dynamic
The distortion that arteries and veins extreme out of shape bends and formed, is common in right coronary artery and rami circumflexus arteriae coronariae sinistrae.In percutaneous coronary
The now standoff problem difficult by lesion locations is frequently resulted in interventional therapy, coronary artery seriously tortuous angulation, especially
It is the challenge pathological changes being even more percutaneous coronary intervention (pci) (pci) with the pathological changes of calcification symptom.For such pathological changes
Interventional therapy except obtaining preferable support force by seal wire in intervention procedure and carries out sufficient pre-expansion to support
Outside, the selection to support, select the good support of flexibility, compliance to pass through property to improve it as far as possible, be to capture such pathological changes
Key point.
Clinically, for the interventional therapy of such pathological changes, attempted being treated using the relatively thin support of beam size although
Being increased by property of support, but but lead to the external diameter of whole support to diminish and have a strong impact on the support force of whole support,
For then can exist with the pathological changes of blood vessel severe calcification simultaneously, support force is not enough, and setting has support and takes off load, causes arteria coronaria to press from both sides
The danger of layer complication.
Content of the invention
For this reason, to be solved by this invention is that supporting structure of the prior art is sick for solving the tortuous angulation of coronary artery
Become and also have difficulties, thus providing a kind of tortuous angulation of coronary artery that is applied to especially with the chain type of angiosteosises pathological changes
Coronary artery bracket.
For solving above-mentioned technical problem, the present invention is achieved through the following technical solutions:
A kind of chain type coronary artery bracket being applied to coronary artery tortuous angulation pathological changes of the present invention, described support is closed by some
The waveform annular unit group closed is shaped as cylinder-like structure, is realized along seal wire by coupling assembly between each described annular unit
The connection of the axial direction of moving direction；Described coupling assembly includes gun iron link assembly and elastic connecting component, described annular unit
Axial height at crest to trough is 5-10mm, and described support saves described annular unit for a unit group with every 2-4, each institute
State and between the adjacent described annular unit in unit group, adopt gun iron link assembly to connect, adopt described between each described unit group
Elastic connecting component connects, and adjacent two radial distances stating between unit group are 5-10mm.
The present invention above-mentioned chain type coronary artery bracket, described elastic connecting component includes integrally formed with described annular unit
Adapter sleeve, socket-connects between the adapter sleeve of adjacent described annular unit, makes there is scalable amount between adjacent described unit group
Connect.
The present invention above-mentioned chain type coronary artery bracket, described elastic connecting component also includes a regulating part, described regulating part tool
There is the connection ring socket-connecting with the adapter sleeve on adjacent described annular unit respectively, make to have between adjacent described unit group adjustable
The connection of section amount.
The present invention above-mentioned chain type coronary artery bracket, described adapter sleeve is passed through a tie-beam and is become with described annular unit one
Type, is connected by connecting rod between the connection ring of described regulating part.
The present invention above-mentioned chain type coronary artery bracket, described gun iron link assembly is straight-bar or N-shaped, s type, w type bar.
The present invention above-mentioned chain type coronary artery bracket, the crest of described annular unit and wave trough position respectively with adjacent described ring
The crest of shape unit and wave trough position are correspondingly arranged, and described coupling assembly passes through to connect the crest of adjacent annular unit or trough is real
Now connect；Or
The crest of described annular unit and wave trough position trough and the crest location pair with adjacent described annular unit respectively
Should arrange, described coupling assembly passes through to connect the crest of adjacent annular unit or trough is realized connecting.
The present invention above-mentioned chain type coronary artery bracket, described crest and/or described trough are for u shape ripple or near described crest
Or there is at wave trough position the ω shape ripple of arc-shaped recess.
The present invention above-mentioned chain type coronary artery bracket, the described crest of each described annular unit or trough respectively with and only with
One described coupling assembly is connected.
The present invention above-mentioned chain type coronary artery bracket, connects between the coupling assembly of two neighboring described annular unit along described
The circumference of support is symmetric.
The present invention above-mentioned chain type coronary artery bracket, each described unit group includes the described annular unit of 3 sections, each described ring-type list
Unit includes 6 groups of crests and trough structure respectively, and between adjacent described annular unit, the circumference along described support is symmetrically arranged with 3 groups
Described coupling assembly.
The present invention above-mentioned chain type coronary artery bracket, the material of described metal tube is selected from rustless steel, cochrome, tantalum, platinum etc.
At least one.
The present invention above-mentioned chain type coronary artery bracket, the described material set a roof beam in place of drawing money on credit is selected from rustless steel, cochrome, tantalum, platinum
Deng at least one.
The present invention above-mentioned chain type coronary artery bracket, the surface-coated of described support has therapeutic agent and/or biocompatibility material
Material.
Chain type coronary artery bracket of the present invention, be directed to coronary artery seriously tortuous angulation especially with angiosteosises
Pathological changes and specific aim exploitation, by between described annular unit arrange elastic connecting component, thickness between need not changing
In the case of realize preferably passing through property, and described support maintain its radial strength, fatigue durability, trackability, pushability,
The demand of the characteristics such as perspectivity, elastic recoil, can eliminate the damage of internal chamber wall caused by dog bone effect simultaneously.
Brief description
In order that present disclosure is more likely to be clearly understood, specific embodiment below according to the present invention simultaneously combines
Accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the structural representation of the described annular unit of chain type coronary artery bracket of the present invention；
Fig. 2 is the perspective view of chain type coronary artery bracket of the present invention；
Fig. 3 is an angiogram being suitable for case of support of the present invention；
Fig. 4 is the state diagram carrying out interventional therapy with prior art medium-height trestle；
Fig. 5 is the state diagram carrying out interventional therapy with herein described chain type support；
In figure reference is expressed as: 1- annular unit, 2- gun iron link assembly, 3- elastic connecting component, 4- adapter sleeve,
5- connection ring, 6- tie-beam, 7- connecting rod, 8- crest, 9- trough.
Specific embodiment
Below with reference to accompanying drawing, the present invention is further detailed.
The chain type coronary artery bracket being applied to coronary artery tortuous angulation pathological changes of the present invention is by 1 group of some annular unit
Become, as shown in figure 1, described annular unit 1 is the wavy shaped configuration of closure, crest 3 and trough 4 are u shape ripple or are leaning on
There is at closely described crest or wave trough position the ω shape ripple of arc-shaped recess, described annular unit is axially high at crest to trough
Spend for 5-10mm.
As shown in Fig. 2 giving a kind of structure of described chain type coronary artery bracket, described support is by the wave of some closures
1 group of shape annular unit is shaped as cylinder-like structure, is realized along seal wire moving direction by coupling assembly between each annular unit 1
The connection of axial direction；In operation, described support is along through its interior seal wire movement to lesion locations.
Coupling assembly includes gun iron link assembly 2 and elastic connecting component 3, often saves described annular unit 1 from crest to ripple
Axial height at paddy is 5-10mm, and described support is with every 3 section annular units 1 for a unit group, the adjacent ring in each unit group
Connected using gun iron link assembly 2 between shape unit 1, the axial distance between adjacent described annular unit in each unit group
(the distance between adjacent annular unit crest and crest) is about 7-12mm, adopts elastic connecting component 3 even between each unit group
Connect, adjacent two axial distances stated between unit group are about 5-10mm.
Each annular unit 1 includes 6 groups of crests 8 and trough 9 structure, the crest 8 of described annular unit 1 and 9, trough respectively
Put and be correspondingly arranged with the crest 8 of adjacent annular unit 1 and trough 9 position respectively, described coupling assembly is adjacent by connecting respectively
The crest 8 of annular unit 1 and trough 9 are realized connecting.Described crest 8 and described trough 9 are near described crest or trough position
The place of putting has the ω shape ripple of arc-shaped recess.Gun iron link assembly 2 is N-shaped bar.
Described elastic connecting component 3 includes and described annular unit 1 adapter sleeve 4, and by tie-beam 6 and annular unit 1
It is integrally formed；Described elastic connecting component 3 also includes a regulating part, regulating part have respectively with adjacent annular unit 1 on company
The connection ring 5 that female connector 4 socket-connects, is connected by connecting rod 7 between described connection ring 5, and described connection ring 5 is described with adjacent respectively
The adapter sleeve 4 of annular unit socket-connects, and makes the connection between adjacent cells group with scalable amount.
The crest 8 of each annular unit 1 or trough 9 respectively with and be only connected with a coupling assembly.Connect adjacent two
Between the coupling assembly of individual annular unit 1, the circumference along support is symmetric, and arranges one at interval of a crest 3 or trough 4
Individual connector 2, between adjacent annular unit 1, the circumference along support is symmetrically arranged with 3 groups of coupling assemblies.
The metal tube of the present invention above-mentioned chain type coronary artery bracket and described connector are made up of cochrome material, excellent
Select cochrome l605 material it is possible to the selective surface-coated in support has therapeutic agent and/or biocompatible materialses.
As the structure that can change, described adapter sleeve 4 can directly be shaped on described annular unit 1, and with
Described connection ring 5 socket-connects connection.
As the structure that can change it is also possible to be not provided with described regulating part, directly pass through adjacent described annular unit 1
On adapter sleeve 4 socket-connect and realize the connection of scalable amount.
As the structure that can change, the crest 8 of described annular unit and trough 9 position respectively with adjacent described ring-type list
The trough 9 of unit and crest 8 position are correspondingly arranged, and described coupling assembly passes through to connect the crest 8 of adjacent annular unit or trough 9 is real
Now connect.
Accompanying drawing 3 gives the coronary angiography figure of a patient, and its right coronary artery assumes extreme case of bending, is more than in angle
360 degree, even if the double seal wire technology of application, ordinary stent cannot be normal through tortuous position.Propped up with arteria coronaria conventional in prior art
Frame (coronary artery bracket of straight tube structure for example disclosed in Chinese patent cn201194854y), it can not pass through its many places well
Blood vessel bent angle (as shown in Figure 4) is it is impossible to complete interventional therapy.
Using the coronary artery bracket shown in illustrations 2, tortuous blood vessel is passed through to arteria coronaria by guiding catheter transfer gantry
Discharge at target lesion, the narrow releasing of target lesion.As shown in Figure 5, can be very good tortuous by diseased region, complete intervene
Treatment.It can be seen that, chain type coronary artery bracket of the present invention, for clinically coronary artery tortuous angulation pathological changes by property relatively
Good, and the requirement to support force for the support can be met completely.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.Right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Change among still in the protection domain of the invention.
Claims (8)
- If a kind of chain type coronary artery bracket being applied to coronary artery tortuous angulation pathological changes it is characterised in that described support by Waveform annular unit (1) group of dry closure is shaped as cylinder-like structure, passes through coupling assembly between each described annular unit (1) Realize the connection of the axial direction along seal wire moving direction；Described coupling assembly includes gun iron link assembly (2) and elastic connecting component (3), axial height at crest to trough for the described annular unit (1) is 5-10mm, and described support saves described ring-type with every 2-4 Unit (1) is a unit group, adopts gun iron link assembly (2) between the adjacent described annular unit (1) in each described unit group Connect, between each described unit group adopt described elastic connecting component (3) connect, the radial direction between unit group described in adjacent two away from From for 5-10mm；Described elastic connecting component (3) includes and the integrally formed adapter sleeve of described annular unit (1) (4), adjacent described ring-type Socket-connect between the adapter sleeve (4) of unit (1), make the connection between adjacent described unit group with scalable amount；Described elastic connecting component (3) also includes a regulating part, described regulating part have respectively with adjacent described annular unit (1) On the connection ring (5) that socket-connects of adapter sleeve (4), make the connection between adjacent described unit group with scalable amount.
- 2. chain type coronary artery bracket according to claim 1 is it is characterised in that described adapter sleeve (4) passes through a tie-beam (6) it is integrally formed with described annular unit (1), pass through connecting rod (7) between the connection ring (5) of described regulating part and connect.
- 3. chain type coronary artery bracket according to claim 1 and 2 is it is characterised in that described gun iron link assembly (2) is straight Bar or N-shaped, s type, w type bar.
- 4. chain type coronary artery bracket according to claim 3 it is characterised in thatThe crest (8) of described annular unit (1) and trough (9) position respectively with the crest (8) of adjacent described annular unit (1) and Trough (9) position is correspondingly arranged, and described coupling assembly passes through to connect the crest (8) of adjacent annular unit (1) or trough (9) is realized Connect；OrThe crest (8) of described annular unit (1) and trough (9) position respectively with the trough (9) of adjacent described annular unit (1) and Crest (8) position is correspondingly arranged, and described coupling assembly passes through to connect the crest (8) of adjacent annular unit (1) or trough (9) is realized Connect.
- 5. chain type coronary artery bracket according to claim 4 is it is characterised in that described crest (8) and/or described trough (9) it is u shape ripple or the ω shape ripple at close described crest (8) or trough (9) position with arc-shaped recess.
- 6. the chain type coronary artery bracket according to claim 4 or 5 is it is characterised in that the institute of each described annular unit (1) State crest (8) or trough (9) respectively with and be only connected with a described coupling assembly.
- 7. the chain type coronary artery bracket according to claim 1,2,4 or 5 is it is characterised in that connect two neighboring described ring Between the coupling assembly of shape unit (1), the circumference along described support is symmetric.
- 8. chain type coronary artery bracket according to claim 7 is it is characterised in that each described unit group includes the described ring of 3 sections Shape unit (1), each described annular unit (1) includes 6 groups of crests (8) and trough (9) structure, adjacent described annular unit respectively (1) between, the circumference along described support is symmetrically arranged with coupling assembly described in 3 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827531.8A CN104490500B (en) | 2014-12-25 | 2014-12-25 | Chain type coronary stent suitable for coronary artery tortuosity angulation lesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827531.8A CN104490500B (en) | 2014-12-25 | 2014-12-25 | Chain type coronary stent suitable for coronary artery tortuosity angulation lesion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104490500A CN104490500A (en) | 2015-04-08 |
| CN104490500B true CN104490500B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410827531.8A Active CN104490500B (en) | 2014-12-25 | 2014-12-25 | Chain type coronary stent suitable for coronary artery tortuosity angulation lesion |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2232288Y (en) * | 1995-04-20 | 1996-08-07 | 田远成 | Dilatation stand for medical use |
| US6129754A (en) * | 1997-12-11 | 2000-10-10 | Uni-Cath Inc. | Stent for vessel with branch |
| EP1871292B1 (en) * | 2005-04-04 | 2019-10-23 | Flexible Stenting Solutions, Inc. | Flexible stent |
| KR101145012B1 (en) * | 2010-06-25 | 2012-05-11 | 사회복지법인 삼성생명공익재단 | Stent |
| CN204411037U (en) * | 2014-12-25 | 2015-06-24 | 周玉杰 | A kind of chain type coronary artery bracket being applicable to the tortuous angulation pathological changes of coronary artery |
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