CN206852682U - Intraluminal stent - Google Patents
Intraluminal stent Download PDFInfo
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- CN206852682U CN206852682U CN201621464563.7U CN201621464563U CN206852682U CN 206852682 U CN206852682 U CN 206852682U CN 201621464563 U CN201621464563 U CN 201621464563U CN 206852682 U CN206852682 U CN 206852682U
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- 230000006835 compression Effects 0.000 claims abstract description 38
- 238000007906 compression Methods 0.000 claims abstract description 38
- 230000008859 change Effects 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 4
- 238000005213 imbibition Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 239000008280 blood Substances 0.000 description 7
- 210000004369 blood Anatomy 0.000 description 7
- 230000017531 blood circulation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 208000007536 Thrombosis Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 marmem Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920004933 Terylene® Polymers 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
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- Prostheses (AREA)
Abstract
Intraluminal stent of the present utility model includes can be in the body and leakage-proof structure that radial direction is compressed and deploys.Body is divided into the first body positioned at leakage-proof structure side and the second body positioned at leakage-proof structure opposite side by leakage-proof structure, and the first body at least part is surrounded by leakage-proof structure.Under natural deployed condition, the diameter of second body is more than the first body by the diameter of leakage-proof structure surrounding portion, under compressive state, second body and the leakage-proof structure have maximum compression diameter when being compressed to the limit along the circumferentially equally distributed radial load of intraluminal stent together with the first body surrounded by leakage-proof structure, and the leakage-proof structure is substantially equal to the maximum compression diameter of the second body together with the maximum compression diameter of the first body surrounded by leakage-proof structure.Intraluminal stent of the present utility model is more uniform with the contact force of sheath core in sheath, can prevent slip of the intraluminal stent during release, avoids the risk that intraluminal stent displacement is brought.
Description
Technical field
It the utility model is related to a kind of cardiac vascular medical apparatus, more particularly to a kind of intraluminal stent.
Background technology
In Endovascular interventional treatment, in order to solve the problems, such as branch vessel blood supply, there are windowing technology and parallel bracket skill
Art.
By taking the windowing technology shown in Fig. 1 as an example.Greatly may be because branch stent 2 be in side between the side opening of support 1 and branch stent 2
Leaked at hole in adherent bad generation type III.In order to solve interior leakage, generally use has the branch stent of leakage-proof structure such as shirt rim
2, increase sealing effectiveness using leakage-proof structure.As shown in Figures 2 and 3, the branch stent 2 with shirt rim 3 is in requisition for larger
Internal diameter D sheath conveys.And presence due to shirt rim 3 and the diameter of sheath are identical everywhere in the axial direction, branch stent 2
It after sheath 4 is fitted into, can be more tightly pressed onto on sheath core by sheath by the part 21 that shirt rim 3 covers, and do not covered by shirt rim 3
Part 22 can self-expanding and extruding to sheath core 5 is weaker or even form gap with sheath core 5.During release, not by shirt rim 3
It can be slided between the part 22 of covering and sheath core 5, then cause stent migration.
Utility model content
The utility model is directed to the defects of prior art, there is provided one kind is adapted to thinner sheath and will not during release
The intraluminal stent of displacement.
A kind of technical scheme is used by the utility model solves its technical problem：A kind of intraluminal stent is provided, including
Can be in the body that radial direction is compressed and deploys and the leakage-proof structure being connected with the body, the body is by the leakage-proof structure point
For positioned at the first body of the leakage-proof structure side and the second body positioned at the leakage-proof structure opposite side, first pipe
Body at least part is surrounded by the leakage-proof structure.Under natural deployed condition, the diameter of second body is more than described first
Body is by the diameter of the leakage-proof structure surrounding portion, under compressive state, second body and the leakage-proof structure together with
First body surrounded by the leakage-proof structure has by along the circumferentially equally distributed radial direction force compresses of the intraluminal stent
Extremely in limited time maximum compression diameter, and the leakage-proof structure together with first body surrounded by the leakage-proof structure most
Big compression diameter is substantially equal to the maximum compression diameter of second body.
In an embodiment of the present utility model, the difference in diameter of second body and first body arrives 0
Between 8mm.
In an embodiment of the present utility model, the leakage-proof structure is enclosed together with first body by the leakage-proof structure
Around the absolute value of maximum compression difference in diameter of maximum compression diameter and second body of part be not more than 0.1mm.
In an embodiment of the present utility model, the axial length of second body is more than the axial direction of first body
Length.
In an embodiment of the present utility model, first body has the diameter of change along its axial direction.
In an embodiment of the present utility model, the part that first body is surrounded by the leakage-proof structure has first
Diameter, the part not surrounded by the leakage-proof structure have and the unequal Second bobbin diameter of the first diameter.
In an embodiment of the present utility model, the Second bobbin diameter is more than first diameter.
In an embodiment of the present utility model, the diameter edge of first body is gradual by the distally directed direction of near-end
Diminish.
In an embodiment of the present utility model, the leakage-proof structure includes overlay film.
In an embodiment of the present utility model, the leakage-proof structure also includes the radial support knot being connected with the overlay film
Structure.
In an embodiment of the present utility model, the leakage-proof structure has openend and blind end, the blind end position
In the junction of first body and the second body.
In an embodiment of the present utility model, surface-closed of the leakage-proof structure both ends with the body is connected.
In an embodiment of the present utility model, the leakage-proof structure is cystic structures, is filled with the cystic structures
Spawn.
In an embodiment of the present utility model, the leakage-proof structure is water imbibition " fine hair " structure.
The diameter of the body of intraluminal stent second of the present utility model is more than the diameter of the first body so that official jargon support is being pressed
After retraction sheath, the contact with sheath core of the second body is even closer, and after compressing, and the maximum compression diameter of the second body is substantially etc.
In the maximum compression diameter of the first body surrounded by shirt rim, therefore intraluminal stent is more equal with the contact force of sheath core in sheath
It is even, slip of the intraluminal stent during release can be prevented, avoids the risk that intraluminal stent displacement is brought.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the structural representation of the intraluminal stent system of prior art；
Fig. 2 be prior art intraluminal stent system in the structural representation that is under deployed condition of branch stent；
Fig. 3 be prior art intraluminal stent system in branch stent in sheath be in compressive state under structural representation
Figure；
Fig. 4 is the structural representation that a kind of intraluminal stent first embodiment of the utility model is under deployed condition；
Fig. 5 is the structural representation of the force part of the radial direction force tester described in the utility model；
Fig. 6 is the compression curve figure of the first body and the second body in intraluminal stent first embodiment of the present utility model；
Fig. 7 is the structural representation that the intraluminal stent in Fig. 4 is under confined state in sheath；
Fig. 8 is the structural representation that a kind of intraluminal stent second embodiment of the utility model is under deployed condition；
Fig. 9 is the structural representation that the intraluminal stent in Fig. 8 is under confined state in sheath.
Embodiment
In order to which the technical characteristics of the utility model, purpose and effect are more clearly understood, it is detailed now to compare accompanying drawing
Illustrate specific embodiment of the present utility model.
First embodiment：
As shown in figure 4, a kind of intraluminal stent includes straight-tube shape body 10 and sets and be connected with body 10 around body 10
Leakage-proof structure.Body 10 is overlay film frame structure, is made up of rack body and the overlay film being coated on rack body.Support sheet
Body can be made up of metal or other materials, such as stainless steel, marmem, titanium alloy or polymer etc., including multiple edges
The wavy annular thing (not shown) of support axial arranging.Overlay film is the film with biocompatibility, and material can be that this area is normal
Polytetrafluoroethylene (PTFE) or terylene.Body 10 has self-expanding, for hollow column and can be compressed and deployed in its radial direction.
Fig. 4 is its structural representation in the deployed state.
In the present embodiment, leakage-proof structure is shirt rim 20, and in other embodiments, leakage-proof structure can also be cystic structures
50 or spongy " fine hair " structure 40 of tool.Wherein, it is filled with spawn in cystic structures 50.And " fine hair " structure 40
In addition to it can prevent interior leakage, additionally it is possible to play a part of block blood flow and accelerate thrombosis.
Shirt rim 20 includes radial support structure 21 and the overlay film 22 being coated in the radial support structure.Shirt rim 20 has
Self-expanding ability, it can be compressed and deployed in its radial direction.Preferably, the radial deformation capabilities of the radial support structure 21 of shirt rim 20
More than the radial deformation capabilities of the rack body of body 10.Radial deformation capabilities refer to identical radial load act under, path length
Variable quantity is bigger or path length rate of change is bigger, then shows that the radial deformation capabilities of radial support structure are stronger, and radial support energy
Power is poorer, on the contrary then radial deformation capabilities are weaker, and radial support ability is stronger.Or same radial rate of change or phase is occurring
During with radial variations amount, radially outward force that the radial support structure 21 of shirt rim 20 needs is than footpath that the rack body of body 10 needs
Outward force is big.Then show that the radial deformation capabilities of radial support structure 21 are weaker, and radial support ability is stronger.It for details, reference can be made to
CN105496603A.In other possible embodiments, shirt rim 20 can also only include overlay film, be filled by the overlay film of softness
Gap between body 10 and blood vessel is so as to playing a part of leaking in anti-.Shirt rim 20 has radially swollen by radial support structure 21
Swollen ability, also referred to as radial support performance or radial support power.For example, can use memory alloy material (such as NiTi close
Gold) radial support structure is prepared, make it have self-expanding ability.The radial support structure 21 can be arrange vertically it is more
Circle wavy annular thing or the network structure that is formed by metal wire knitted or formed by cuts in metallic pipe
Network structure is cut, one of ordinary skill in the art can select suitable radial support structure as needed, not another herein
One repeats.
Shirt rim 20 has openend and blind end.Wherein, openend is in bar shape, and blind end is in the cone being connected with cylinder
Shape.Blind end is connected with the face seal of body 10, so as to divide body 10 to be surrounded by shirt rim 20 and being located at blind end side
The first body 11 and the second body 12 positioned at blind end opposite side.The openend of shirt rim 20 towards away from the second body 12 side
To extension, the bearing of trend of the second body 12 is opposite with the bearing of trend of shirt rim 20.After intraluminal stent is compressed, shirt rim 20 is enclosed
It is wound on the outer peripheral face of the first body 11.Cause shirt rim 20 after stenter to implant because of the radial support structure 21 that shirt rim 20 has
Lumen wall can be attached, and effective clearance is formed between the body 11 of shirt rim 20 and first, when blood proximally flows into tube chamber branch
During frame, blood flows into gap simultaneously, and because the mouth of pipe of blind end is closed, then the blood flowed into the gap will be prevented from continuing to flow
Dynamic, so as to reduce or even avoid blood flow to flow between the second body 12 and lumen wall the gap formed, cut-out, which is formed in I types, leaks
Passage or opening.And this part blood in the gap can direct thrombosis so that sealing filling effect is more preferably.It is close herein
During envelope, it is not necessary to add other sealings or packing material in intraluminal stent or after implantation intraluminal stent in advance, only need just
Sealing can be achieved in the blood flowed into normal blood circulation, will not additionally increase and seal or biological style of study that packing material is brought
Danger.In the utility model in other possible embodiments, shirt rim 20 can be in cone shape, include as shown in Fig. 4 with circle
The connected column of cone.
In addition, in other possible embodiments, the both ends of shirt rim hermetically can be connected with body.This is closed at both ends
Shirt rim can only include overlay film, can also further comprise radial support structure as the aforementioned.
In the utility model, the diameter of the second body 12 is more than the first body 11 by the diameter of the surrounding portion of shirt rim 20,
And the length on the axial direction of the second body 12 is more than the length on the axial direction of the first body 11.Preferably, under natural deployed condition, the
Two bodys 12 and the first body 11 are fallen in [0,8mm] this section by the difference of the surrounding portion diameter of shirt rim 20, therefore in pipe
After chamber support is compressed into sheath, the contact force between the second body 12 and sheath core 31 is increased.The utility model defines first
Body 11, the second body 12 and it is centered around the shirt rim 20 of the periphery of the first body 11 and is circumferentially uniformly distributed along the intraluminal stent
External diameter of radial load when being compressed to the limit be compression diameter, then as shown in fig. 7, shirt rim 20 is together with first surrounded by shirt rim 20
The maximum compression diameter of body 11 is substantially equal to the maximum compression diameter of the second body 12.Preferably, shirt rim 20 is together with by shirt rim
The maximum compression diameter and the absolute value of the difference of the maximum compression diameter of the second body 12 of 20 the first bodys 11 surrounded do not surpass
Cross 0.1mm.The difference of the two is the smaller the better, when the difference is close to 0, to be first-class straight when intraluminal stent is compressed into sheath
The cylinder in footpath, this means that the contact force of this intraluminal stent and sheath core is uniform.Significantly, since in the present embodiment
In, body 10 is the column of uniform diameter, therefore its maximum compression diameter is its compression diameter.In other embodiments,
If the caliber of body 10 is simultaneously non-homogeneous, the compression diameter i.e. maximum compression diameter at its maximum gauge should be taken.
Specifically, compression diameter can be tested by radial load, and compression diameter and the function of radial load are obtained using computer
Relation.When decrement reaches maximum, the change of the increase of power on decrement influences minimum, passes through computer fitting, obtains
Curve when power stably increases.Specifically, sheath core being passed through into intraluminal stent, sheath core preferably uses the hard sheath core of regular size, if
The external diameter change speed for putting radial direction force tester force part as shown in Figure 5 is 0.1mm/s, until sheath core and intraluminal stent are tight
Untill contiguity is touched.The numerical value of series of discrete can be obtained by the method for testing, and these discrete numerical value are linked to be radially
The relation curve of power and compression diameter, as shown in fig. 6, X-axis is compression diameter, Y-axis is application radial load.With the first body 11
Compression curve L2 exemplified by.Make the tangent line of discrete point respectively on compression curve L2, obtain several tangent lines and the intersection point of X-axis.
Two point D1 and D2 are chosen in these intersection points, if D1 and the absolute value of 2 differences of D2 are not more than 0.01, then fixed in D1 and D2
Adopted D1 is the compression diameter of the first body 11.As shown in fig. 7, intraluminal stent be implanted it is intravascular before, it is necessary to first be pressed
It is retracted in sheath 30, and makes sheath core 31 pass through intraluminal stent.Because the first body 11 is less than by the diameter of the surrounding portion of shirt rim 20
The diameter of second body 12, the compression diameter after shirt rim 20 is fully compressed together with the first body 11 surrounded by shirt rim 20 are basic
Equal to the compression diameter of the second body 12.
The diameter of second body of intraluminal stent of the present utility model is more than the diameter of the first body so that intraluminal stent exists
After being compressed into sheath, the contact with sheath core of the second body is even closer, and after compression, the maximum compression diameter of the second body is substantially
Equal to the maximum compression diameter of the first body surrounded by shirt rim, thus intraluminal stent in sheath with the contact force of sheath core more
Uniformly, slip of the intraluminal stent during release can be prevented, avoids the risk that intraluminal stent displacement is brought.
It should be understood that when the first body 11 has, part is not surrounded by shirt rim 20 and the axial length of the part is shorter by (one
As be not more than 2CM) when, although the diameter of the part is relative unlike will not also be caused the part greatly by the diameter of shirt rim surrounding portion
In the slip of sheath core.And when the first body 11 has the part not surrounded by shirt rim and the longer part, can be by the part
Diameter design into more than the first body by the diameter of shirt rim surrounding portion.
Second embodiment：
As shown in figure 8, the present embodiment intraluminal stent structure and first embodiment it is essentially identical.Unlike, this reality
To apply in example, the first body 101 has the diameter of change along its axial direction in the deployed state, and the second body 102 is straight-tube shape,
There is identical diameter d3 at any two points vertically.Specifically, the part that the first body 101 is surrounded by shirt rim 200
With the first maximum gauge d1, the part not surrounded by shirt rim 200 has the second maximum gauge d2, d1 ＜ d2=d3, that is,
Say, the section of the first body 101 is in step-like.As shown in figure 9, due to the presence of the ledge structure of the first body 101, when tube chamber branch
When frame is in confined state, shirt rim 200 is compressed into the part with the first diameter d1 completely, and surrounded by shirt rim 200
Partial compression diameter is equal to d2 and d3.
The position away from shirt rim 200 is partially located in larger diameter d2, and this position is the arrival end of blood, compared with
Big diameter d2 can make it that the contact area of the first body 101 and blood is bigger, and blood is easier to flow into the first body 101.
It is worth noting that, the first body 101 and the second body 102 can also have a variety of changes, example along its axial direction, its diameter
Such as, the diameter of the first body 101 can taper into along close to shirt rim 200 and the direction of the connected position of body 100.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to the utility model patent scope.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (14)
1. a kind of intraluminal stent, including can in the body that radial direction is compressed and deploys and the leakage-proof structure being connected with the body,
The body is divided into positioned at the first body of the leakage-proof structure side and another positioned at the leakage-proof structure by the leakage-proof structure
Second body of side, first body at least part are surrounded by the leakage-proof structure, it is characterised in that deploy shape naturally
Under state, the diameter of second body is more than first body by the diameter of the leakage-proof structure surrounding portion, compressive state
Under, second body and the leakage-proof structure have by edge together with first body surrounded by the leakage-proof structure
The circumferentially equally distributed radial load of the intraluminal stent is compressed to the maximum compression diameter during limit, and the leakage-proof structure together with
The maximum compression diameter of first body surrounded by the leakage-proof structure is substantially equal to the maximum compression of second body
Diameter.
2. intraluminal stent according to claim 1, it is characterised in that the diameter of second body and first body
Difference is 0 between 8mm.
3. intraluminal stent according to claim 2, it is characterised in that the leakage-proof structure is together with first body by institute
State the absolute value of the maximum compression diameter for the part that leakage-proof structure surrounds and the maximum compression difference in diameter of second body not
More than 0.1mm.
4. intraluminal stent according to claim 3, it is characterised in that the axial length of second body is more than described the
The axial length of one body.
5. intraluminal stent according to claim 1, it is characterised in that first body has change along its axial direction
Diameter.
6. intraluminal stent according to claim 5, it is characterised in that what first body was surrounded by the leakage-proof structure
Part has the first diameter, and the part not surrounded by the leakage-proof structure has straight with first diameter unequal second
Footpath.
7. intraluminal stent according to claim 6, it is characterised in that the Second bobbin diameter is more than first diameter.
8. intraluminal stent according to claim 5, it is characterised in that the diameter of first body is remote along being pointed to by near-end
The direction at end tapers into.
9. intraluminal stent according to claim 1, it is characterised in that the leakage-proof structure includes overlay film.
10. intraluminal stent according to claim 9, it is characterised in that the leakage-proof structure also includes and the overlay film phase
Radial support structure even.
11. according to the intraluminal stent described in any one of claim 9 or 10, it is characterised in that the leakage-proof structure has opening
End and blind end, the blind end are located at the junction of first body and the second body.
12. according to the intraluminal stent described in any one of claim 9 or 10, it is characterised in that the leakage-proof structure both ends with
The surface-closed of the body is connected.
13. intraluminal stent according to claim 1, it is characterised in that the leakage-proof structure is cystic structures, the cryptomere
Spawn is filled with structure.
14. intraluminal stent according to claim 1, it is characterised in that the leakage-proof structure is water imbibition " fine hair " structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621464563.7U CN206852682U (en) | 2016-12-28 | 2016-12-28 | Intraluminal stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621464563.7U CN206852682U (en) | 2016-12-28 | 2016-12-28 | Intraluminal stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206852682U true CN206852682U (en) | 2018-01-09 |
Family
ID=60815180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621464563.7U Active CN206852682U (en) | 2016-12-28 | 2016-12-28 | Intraluminal stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206852682U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121197A1 (en) * | 2016-12-28 | 2018-07-05 | 先健科技(深圳)有限公司 | Luminal stent |
| CN109464213A (en) * | 2018-12-20 | 2019-03-15 | 东莞先健畅通医疗有限公司 | Overlay film frame and overlay film frame system |
| CN114983645A (en) * | 2022-05-31 | 2022-09-02 | 浙江大学高端装备研究院 | Hierarchical self-expansion bifurcated vascular stent and implantation method thereof |
-
2016
- 2016-12-28 CN CN201621464563.7U patent/CN206852682U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121197A1 (en) * | 2016-12-28 | 2018-07-05 | 先健科技(深圳)有限公司 | Luminal stent |
| CN109464213A (en) * | 2018-12-20 | 2019-03-15 | 东莞先健畅通医疗有限公司 | Overlay film frame and overlay film frame system |
| CN109464213B (en) * | 2018-12-20 | 2020-12-15 | 深圳市先健畅通医疗有限公司 | Covered stent and covered stent system |
| CN114983645A (en) * | 2022-05-31 | 2022-09-02 | 浙江大学高端装备研究院 | Hierarchical self-expansion bifurcated vascular stent and implantation method thereof |
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