CN209611445U - A kind of intravascular stent - Google Patents
A kind of intravascular stent Download PDFInfo
- Publication number
- CN209611445U CN209611445U CN201721352528.0U CN201721352528U CN209611445U CN 209611445 U CN209611445 U CN 209611445U CN 201721352528 U CN201721352528 U CN 201721352528U CN 209611445 U CN209611445 U CN 209611445U
- Authority
- CN
- China
- Prior art keywords
- repetitive unit
- supporter
- intravascular stent
- repeated
- repetitive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Prostheses (AREA)
Abstract
The utility model relates to a kind of intravascular stents, the intravascular stent includes supporter and connector, the supporter includes multiple repetitive units, the connector includes multiple repeated monomers, multiple repetitive units of the supporter are at least connected by a repeated monomer between bracket axial alignment, the adjacent repetitive unit of the supporter.The intravascular stent of the utility model is especially suitable for coronary artery, good to the support effect of coronary artery, the supporter of the utility model intravascular stent includes multiple repetitive units, and each repetitive unit can be deformed with effective coordination, so as to reduce axial cripetura rate, when release, plays the role of accurate positioning.
Description
Technical field
The invention belongs to medical instruments fields, and in particular to a kind of intravascular stent.
Background technique
Coronary atherosclerosis is one of the Main Cardiovascular Disease that contemporary society threatens human life.At present clinically
Stent is the main method for treating coronary artery stenosis, and by more than 20 years clinical treatments, the method for interventional therapy was
Vascular surgery circle is received, simultaneously because wound is small, patient can also receive, and the present country has many hospitals to carry out this work
Make.
Currently, tubular bracket is the cantilever type for being most commonly used for coronary stent operation.Come from processing technology
It says, tubular bracket is typically all to be made by metal pipe material through laser engraving or the mode of etching.For from design structure,
Tubular bracket is typically all to be made of supporter and connector.It can be by its point according to the combination difference of supporter with connector
It is two kinds, one kind being referred to as open loop structure, the BX-Velocity bracket designed such as Cordis company；Opposite another kind is referred to as
Closed loop configuration, the Multi-Link bracket designed such as Guidant company.
The supportive and flexibility of tubular bracket are all preferable at present, but there is also some problems:
1) supporter of most of bracket is axially symmetrically arranged along bracket, connector both ends respectively with the circular arc of supporter
Outside is connected, and bracket axial dimension is made to shorten when supporter circumferentially deforms when the stent expands so that axial cripetura rate compared with
It is high.
2) cradle support and connector are made of more straightway and arc section, when occuring bending and deformation, deformation
Ability is poor, and the ability of bracket adaptation blood vessel is poor when especially implantation is bent lesion, will cause inner film injury or inflammatory reaction etc.
Bad phenomenon.
3) when endovascular stent is by period blood flow pulsating load, fatigue strength is not only related with magnitude of load, also with
Bracket material itself is related with framework size, and animal experiment proves not enough to cause showing for fatigue fracture due to stent fatigue intensity
As happening occasionally.
Intravascular stent is used for a long time in human body as alloplasm, closely related with the health after patient's treatment.Cause
This, people are not only to the design of bracket and material requirements near ideal, more to the support performance of bracket, submissive performance, tired longevity
Life and the mechanical properties such as hydrodynamic characteristic propose higher requirement, thus it is necessary to carry out the research and development of novel vascular stent and
Application study.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a kind of blood vessel branch that structure is different
Frame, which, which has, is not easily formed Restenosis, and histocompatbility is good, and not shadow appropriate to the support force of blood vessel
Blood flow is rung, structure is simple, easy to operate, accurate positioning, can satisfy in clinic to the needs of hemadostewnosis treatment.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
This application involves a kind of intravascular stent, the intravascular stent includes supporter and connector,
The supporter includes multiple repetitive units,
The connector includes multiple repeated monomers,
Multiple repetitive units of the supporter along bracket axial alignment,
At least it is connected by a repeated monomer between the adjacent repetitive unit of the supporter.
Preferably, the repetitive unit is connected to form by arc section or broken line, and each repetitive unit is along branch
Frame axial direction asymmetric geometry.
Preferably, the repeated monomer is connected to form by arc section or broken line, and each repeated monomer is along branch
Frame axial direction asymmetric geometry.
Preferably, multiple repetitive units of the supporter include that multiple first repetitive units and multiple second repeat list
Member, first repetitive unit and the second repetitive unit alternate arrangement, the first repetitive unit packet of the supporter
Multiple first arc sections are included, are connected between the first adjacent arc section by the first excessive circular, described first repeats list
The bending direction of multiple first arc sections of member is identical, and the second repetitive unit of the supporter includes multiple second circular arcs
Section, it is connected between the second adjacent arc section by the second excessive circular, multiple second circles of second repetitive unit
The bending direction of segmental arc is identical.
Preferably, multiple first arc sections are identical with the radius of curvature of multiple second arc sections.
Preferably, the first repetitive unit is obtained by 180 ° of the rotation of the second repetitive unit.
Preferably, first excessive circular and second excessive circular are staggered 0.1 in the circumferential direction of intravascular stent
~0.5mm.
Preferably, multiple repeated monomers of the connector include that multiple first repeated monomers and multiple second repeat list
The bending direction of body, multiple first repeated monomers is identical, and the bending direction of multiple second repeated monomers is identical.
Preferably, one end of first repeated monomer is connected to the outside of first excessive circular, the other end
It is connected to the inside of second excessive circular；One end of second repeated monomer is connected to the excessively circle of described second
The outside of arc, the other end are connected to the inside of first excessive circular.
Preferably, 180 ° of the first repeated monomer of the connector and the second repeated monomer rotation obtain.
Preferably, the bending direction phase of first repeated monomer and the second arc section of second repetitive unit
Together；Second repeated monomer is identical as the bending direction of the first arc section of the first repetitive unit.
Preferably, the radius of curvature of the first repeated monomer of the connector and the second repeated monomer is greater than the branch
The first repetitive unit and the second repetitive unit of support body form the first arc segment and the second arc segment radius of curvature.
Preferably, length of the connector in intravascular stent axial direction is the supporter in intravascular stent axial direction
1~1.5 times of upper length.
Preferably, the first repetitive unit of the supporter and the number of the second repetitive unit are identical, number of unit 4-
20.
Preferably, the first repeated monomer of the connector and the number of the second repeated monomer are identical or not identical, single
Body number 2-16.
Preferably, the number of the repetitive unit is more than the number of the repeated monomer.
Preferably, the spacing distance in intravascular stent axial direction of first repetitive unit and the second repetitive unit is
0.5~3mm.
Preferably, the width of the repetitive unit repetitive unit is 0.05~0.3mm.
Preferably, the width of the repeated monomer is the 40~80% of the width of the repetitive unit.
Preferably, the supporter of the intravascular stent and the wall thickness of connector are identical.
Due to the implementation of above-mentioned technical proposal, the invention has the following advantages over the prior art:
Intravascular stent of the invention is especially suitable for coronary artery, the branch of intravascular stent of the present invention good to the support effect of coronary artery
Support body includes multiple repetitive units, and each repetitive unit can be deformed with effective coordination, so as to reduce axial cripetura rate, release
When play the role of accurate positioning.
Detailed description of the invention
Fig. 1 is that the intravascular stent of embodiment 1 is launched into the structural schematic diagram of plane；
Fig. 2 is the enlarged drawing of the first repetitive unit and the second repetitive unit；
Fig. 3 is the enlarged drawing of the first repetitive unit；
Fig. 4 is the enlarged drawing of the second repetitive unit；
Fig. 5 is the enlarged drawing of the first repeated monomer；
Fig. 6 is the enlarged drawing of the second repeated monomer；
Fig. 7 is that the intravascular stent of embodiment 2 is launched into the structural schematic diagram of plane；
Fig. 8 is that the intravascular stent of embodiment 3 is launched into the structural schematic diagram of plane；
Fig. 9 is that the intravascular stent of embodiment 4 is launched into the structural schematic diagram of plane；
Wherein: 1, the first repetitive unit；11,13, first arc section；12, the first excessive circular；2, the second repetitive unit；
21,23, second arc section；22, the second excessive circular；3, the first repeated monomer；4, the second repeated monomer,
L1 the first excessive circular 12 and the longitudinal length that is staggered of the second excessive circular 22；L2 the first repetitive unit 1 and the second weight
Multiple unit 2 is along bracket axial direction spacing distance；The length of the first repetitive unit of L3 1；The length of the second repetitive unit of L4 2；L5 first
The length of repeated monomer 3；The length of the second repeated monomer of L6 4；
The radius of curvature of the arc section 11 of the first repetitive unit of R1；The curvature of the first arc section of the first repetitive unit of R2 13 half
Diameter；The radius of curvature of the second repetitive unit of R3 arc section 21；The radius of curvature of the second repetitive unit of R4 arc section 23；The first weight of R5
The radius of curvature of multiple monomer 3；The radius of curvature of the second repeated monomer of R6 4；
C1 carriage center line.
Specific embodiment
The present invention will be further described in detail combined with specific embodiments below, but the present invention is not limited to following implementations
Example.
Intravascular stent of the invention is primarily adapted for use in human vas, especially suitable for (such as Fig. 1) in coronary artery.By blood vessel
During stenter to implant coronary artery, intravascular stent is mounted on the sacculus of stent delivery system, at this point, intravascular stent is in compression
State, after intravascular stent is delivered to lesion locations by conveyer, through pressure pump Filled Balloon, intravascular stent expands outwardly to expansion
The state of opening, to play a supporting role to coronary artery, intravascular stent has the first cross section in compressive state, in expansion state
With the second cross section, also, the diameter of the first cross section is less than the diameter of the second cross section.In the present invention, the first cross section
With the axis perpendicular of the second cross section and intravascular stent.In the present embodiment, the outer diameter of the second cross section is 2~8mm, preferably
2~5mm.
The material of intravascular stent is stainless steel, memorial alloy, titanium alloy, tantalum alloy, cochrome, biodegradable gold
One of category, biodegradable polymer, magnesium alloy, pure iron are a variety of.SUS-316L stainless steel etc. can be used in stainless steel.Note
Recalling alloy can be used Ni-Ti alloy, Cu-Al-Mn alloy etc..CoCr-L605 cochrome etc. can be used in cochrome.Biology can
Degradation metal is a kind of metal, such as pure magnesium, magnesium alloy, pure iron and ferroalloy etc. that can be decomposed in human body.Biodegradable
Polymer can be polylactic acid, polyglycolic acid, poly- (lactic acid -6-caprolactone), the biodegradables such as poly- (glycolic -6-caprolactone)
Polymer.In addition, a kind of biodegradable polymer material can also be coated as blood vessel branch in vivo in degradable metal
The material of frame.
Intravascular stent of the invention can use laser engraving one-pass molding.The production process of laser engraving: firstly, being based on
Support Design drawing creates cutting path using CAM；Secondly, being cut by laser to metal or high molecular material；Finally, by
Pickling and electrochemical process improve surface smoothness, keep each edge shape mellow and full.
As shown in Figure 1, being a kind of intravascular stent of the embodiment of the present application one, the intravascular stent includes supporter and company
Junctor, the supporter include multiple repetitive units, and the connector includes multiple repeated monomers, the supporter
Multiple repetitive units are between bracket axial alignment, the adjacent repetitive unit of the supporter at least by a repeated monomer
It is connected.Multiple repetitive units of the supporter include multiple first repetitive units 1 and multiple second repetitive units 2, described
The first repetitive unit 1 and the second repetitive unit 2 alternate and be arranged, the first repetitive unit 1 is revolved by the second repetitive unit 2
Turn 180 ° to obtain.Multiple repeated monomers of the connector include multiple first repeated monomers 3 and the second repeated monomer 4,
What 180 ° of the first repeated monomer 3 of the connector and the second repeated monomer 4 rotation obtained.First repetitive unit 1
With the first excessive circular 12, second repetitive unit 2 has the second excessive circular 22, first excessive circular 12
With second excessive circular 22 in the 0.1~0.5mm that is circumferentially staggered.First repetitive unit 1 and second of the supporter
Repetitive unit 2 is spaced 0.1~0.5mm along bracket axial direction asymmetric geometry in the axial direction.The adjacent repetition of the supporter
It is connected between unit by least one first repeated monomer 3 or the second repeated monomer 4.First repetitive unit of the supporter
1 is identical with the number of the second repetitive unit 2, and number of unit 4-20.First repeated monomer 3 of the connector and the second weight
The number of multiple monomer 4 is identical or not identical, and number of monomers 2-16.First repetitive unit 1 of the supporter and the second weight
The number of multiple unit 2 is more than the first repeated monomer 3 of the connector and the number of the second repeated monomer 4.In the present embodiment
In, the repetitive unit of the supporter, which is connected with the repeated monomer of connector by arc section, to be formed.The supporter
The first repetitive unit 1 include multiple first arc sections 11,13, between the first adjacent arc section 11,13 excessively by first
Circular arc 12 is connected, and second repetitive unit 2 includes multiple second arc sections 21,23, the second adjacent arc section 21,23
Between be connected by the second excessive circular 22, multiple first arc sections 11,13 and multiple second arc sections 21,23
Radius of curvature is identical.The bending direction of multiple first arc sections 11,13 of first repetitive unit 1 is identical, and described
The bending direction of multiple second arc sections 21,23 of two-repeating unit 2 is identical.One end of first repeated monomer 3 connects
To the outside of first excessive circular 12, the other end is connected to the inside of second excessive circular 22；Described
One end of two repeated monomers 4 is connected to the outside of second excessive circular 22, and the other end is connected to described first excessively
The inside of circular arc 12.The bending of first repetitive unit 1 and the second arc section 21,23 of second repeated monomer 4
Direction is identical；The bending direction of second repetitive unit 2 and the first arc section 11,13 of first repeated monomer 3
It is identical.The radius of curvature of first repeated monomer 3 of the connector and the second repeated monomer 4 is greater than the of the supporter
The radius of curvature of one repetitive unit 1 and the second repetitive unit 2.First repetitive unit 1 and second of the supporter repeats list
The spacing distance in intravascular stent axial direction of member 2 is 0.5~3mm.First repeated monomer 3 of the connector and the second weight
The first repetitive unit 1 and the second repetitive unit 2 that the distance in the longitudinal direction of multiple monomer 4 is the supporter are in the axial direction
1~1.5 times of length.The width of first repetitive unit 1 of the supporter and the second repetitive unit 2 is 0.05~
0.3mm.Length of the first repeated monomer 3 and the second repeated monomer 4 of the connector in intravascular stent axial direction is described
Supporter the first repetitive unit 1 and the second repetitive unit 2 width 40~80%.The supporter of the intravascular stent
It is identical with the wall thickness of connector.
The specific effect of the present embodiment is as follows:
1) axial cripetura rate is low: the supporter of intravascular stent of the present invention includes multiple repetitive units, and the first repetitive unit
It alternates and is arranged with the second repetitive unit, at least by a circular arc or broken line between the adjacent repetitive unit of supporter
The connector of composition is connected, and each repetitive unit can be deformed with effective coordination, so as to reduce axial cripetura rate, when release from
To the effect of accurate positioning.
2) it is strong to adapt to vessel patency: the repetitive unit of the supporter of intravascular stent of the present invention and the repeated monomer of connector are
It is made of and is connected circular arc or broken line, deformability is stronger, submissive better performances, has the ability for well adapting to blood vessel, release
Accurately, easy to operate.
3) fatigue strength is high: at least by one first between the adjacent repetitive unit of the supporter of intravascular stent of the present invention
Repeated monomer or the second repeated monomer are connected, and the radius of curvature of arc section is identical, and bending direction is identical, each repetitive unit
Can effective distractive load, so as to improve fatigue strength.
Embodiment 2 is identical with the above content of embodiment 1, difference only with: in embodiment 1, the weight of the supporter
Multiple unit is all made of arc section with the repeated monomer of connector to be connected, as shown in figs. 1 to 6.In embodiment 2, the branch
The repetitive unit of support body is all made of broken line with the repeated monomer of connector to be connected, as shown in Figure 7.
Embodiment 3 is identical with the above content of embodiment 1, difference only with: in embodiment 1, the weight of the supporter
Multiple unit is all made of arc section with the repeated monomer of connector to be connected, as shown in figs. 1 to 6.In embodiment 3, the branch
First repetitive unit 1 of support body, which is made of with the second repetitive unit 2 arc section, to be connected, and the first of the connector repeats single
Body 3, which is made of with the second repeated monomer 4 broken line, to be connected, as shown in Figure 8.
Embodiment 4 is identical with the above content of embodiment 1, difference only with: in embodiment 1, the weight of the supporter
Multiple unit is all made of arc section with the repeated monomer of connector to be connected, as shown in figs. 1 to 6.In embodiment 4, the branch
First repetitive unit 1 of support body, which is made of with the second repetitive unit 2 broken line, to be connected, and the first of the connector repeats single
Body 3, which is made of with the second repeated monomer 4 arc section, to be connected, as shown in Figure 9.
Intravascular stent of the invention is good to the support effect of coronary artery and small to the injury of coronary artery wall especially suitable for coronary artery,
The formation of Restenosis after capable of effectively avoiding intravascular stent from being implanted into, in addition, intravascular stent of the invention can be good at
It is positioned in coronary artery, improves the accuracy of release, easy to operate, the structure of intravascular stent of the invention is simple, production
It is convenient, it is at low cost, to have important practical significance and good potential applicability in clinical practice.
The present invention is described in detail above, its object is to allow the personage for being familiar with this field technology that can understand this
The content of invention is simultaneously implemented, and it is not intended to limit the scope of the present invention, and the present invention is not limited to above-mentioned implementations
, equivalent change or modification made by all Spirit Essences according to the present invention should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of intravascular stent, it is characterised in that: the intravascular stent includes supporter and connector,
The supporter includes multiple repetitive units,
The connector includes multiple repeated monomers,
Multiple repetitive units of the supporter along bracket axial alignment,
At least it is connected by a repeated monomer between the adjacent repetitive unit of the supporter,
The repetitive unit is connected to form by arc section or broken line, and each repetitive unit is axially asymmetric along bracket
Arrangement, the repeated monomer are connected to form by arc section or broken line, and each repeated monomer is axially non-right along bracket
Claim arrangement,
Multiple repetitive units of the supporter include multiple first repetitive units and multiple second repetitive units,
First repetitive unit and the second repetitive unit alternates arrangement,
First repetitive unit of the supporter includes multiple first arc sections, passes through first between the first adjacent arc section
Excessive circular is connected, and the bending direction of multiple first arc sections of first repetitive unit is identical,
Second repetitive unit of the supporter includes multiple second arc sections, passes through second between the second adjacent arc section
Excessive circular is connected, and the bending direction of multiple second arc sections of second repetitive unit is identical.
2. intravascular stent according to claim 1, it is characterised in that: multiple first arc sections and multiple second circles
The radius of curvature of segmental arc is identical.
3. intravascular stent according to claim 1, it is characterised in that: multiple repeated monomers of the connector include more
A first repeated monomer and multiple second repeated monomers, the bending direction of multiple first repeated monomers is identical, and multiple second repeat
The bending direction of monomer is identical.
4. intravascular stent according to claim 3, it is characterised in that: one end of first repeated monomer is connected to institute
The outside for the first excessive circular stated, the other end are connected to the inside of second excessive circular；Described second repeats single
One end of body is connected to the outside of second excessive circular, and the other end is connected to the inside of first excessive circular.
5. intravascular stent according to claim 4, it is characterised in that: first repeated monomer and second weight
The bending direction of second arc section of multiple unit is identical；The first of second repeated monomer and first repetitive unit
The bending direction of arc section is identical.
6. intravascular stent according to claim 5, it is characterised in that: the first repeated monomer of the connector and second
The radius of curvature of repeated monomer is greater than the first repetitive unit of the supporter and the second repetitive unit forms the first arc section
With the second arc section curvature radius.
7. intravascular stent according to claim 1, it is characterised in that: the width of the repeated monomer is the repetitive unit
Width 40~80%.
8. intravascular stent according to claim 1, it is characterised in that: the supporter of the intravascular stent and connector
Wall thickness is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721352528.0U CN209611445U (en) | 2017-10-18 | 2017-10-18 | A kind of intravascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721352528.0U CN209611445U (en) | 2017-10-18 | 2017-10-18 | A kind of intravascular stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209611445U true CN209611445U (en) | 2019-11-12 |
Family
ID=68440744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721352528.0U Active CN209611445U (en) | 2017-10-18 | 2017-10-18 | A kind of intravascular stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209611445U (en) |
-
2017
- 2017-10-18 CN CN201721352528.0U patent/CN209611445U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105726174B (en) | A kind of intravascular stent, preparation method and application | |
| CN204951247U (en) | Biodegradable metal blood vessel support | |
| CN101385669B (en) | Anti-coagulation stainless steel coronary arterial bracket and uses thereof | |
| CN106691647B (en) | A kind of biodegradable metals intravascular stent and its application | |
| JP2012518474A (en) | Biodegradable prosthesis | |
| CN102525701B (en) | Absorbable blood vessel stent | |
| WO2007040250A1 (en) | Stent to be placed in the living body | |
| CN106176003B (en) | A kind of intravascular stent, preparation method and application | |
| CN103550017A (en) | Intravascular stent applicable to conical blood vessel | |
| CN105726178B (en) | A kind of intravascular stent, its preparation method and application | |
| CN102813566A (en) | Coronary stent | |
| CN107550611A (en) | A kind of intravascular stent | |
| CN103300951A (en) | Vertebral artery stent | |
| CN209611445U (en) | A kind of intravascular stent | |
| CN106236342A (en) | A kind of implanted complete biological absorbable blood vessel polymer support | |
| CN203988521U (en) | A kind of asymmetric conical intravascular stent | |
| US20060130934A1 (en) | Medical instrument for soft tissue and method for manufacture thereof | |
| US20200276035A1 (en) | Intravascular stent, preparation method and use thereof | |
| CN203425071U (en) | Blood vessel stent suitable for conical blood vessel | |
| CN206777427U (en) | A kind of complete biological absorbable blood vessel polymer support of implanted | |
| CN207168613U (en) | A kind of intravascular stent | |
| CN203425069U (en) | Targeted drug delivery tube woven intravascular stent | |
| CN201968866U (en) | Absorbable blood vessel support | |
| CN103110465B (en) | Magnesium alloy coronary support frame | |
| CN202568545U (en) | Coronary stent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |