CN2885176Y - A self-expanding vascular stent - Google Patents
A self-expanding vascular stent Download PDFInfo
- Publication number
- CN2885176Y CN2885176Y CN 200620057977 CN200620057977U CN2885176Y CN 2885176 Y CN2885176 Y CN 2885176Y CN 200620057977 CN200620057977 CN 200620057977 CN 200620057977 U CN200620057977 U CN 200620057977U CN 2885176 Y CN2885176 Y CN 2885176Y
- Authority
- CN
- China
- Prior art keywords
- metallic
- body member
- intravascular stent
- self expandable
- metallic supports
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses an expanding artery frame, which is tubular structure, and multilayer wave shape cyclic-ring structure metal members are arranged radically by a metallic supporter. The metallic supporter is connected on the ridge between adjacent metal members, two wave lengths are between the two metallic supporters on the same layer, and two adjacent layers of metallic supporters are arranged alternatively. The frame is made of nickel-cemented carbide and forms a unity. Compared with the prior art, the utility model can improve the radial stress, the axial regain ratio is little, and the position is not changed easily. Meanwhile, as for the limiting maximum concentrated stress of peak-to-valley, the rapture and big deforming are solved. The adjacent layers are plugged into the supporter, the material is saved, and the structure is simpler.
Description
Technical field
This utility model relates to a kind of Wicresoft and hinders interventional medical device, specifically a kind of self expandable intravascular stent.
Background technology
At present, coronary heart disease, cerebrovascular disease have become especially senior health and fitness's one of main " killer " of the harm public, and in recent years, cardiovascular disease has the trend that sickness rate increases in young and middle-aged crowd.Coronary heart disease and cerebrovascular disease be narrow by vessel lumen, block causedly, and Stent is exactly a kind of Wicresoft interventional therapy method at this disease, it have wound little, recover the advantage that is showing such as fast.
Intravascular stent is the interior eyelid retractor of blood vessel that a kind of metal rustless steel or other special material are made, can be divided into balloon-expandable and self expandable type support according to its mode of strutting, the balloon-expandable support is that support is installed on the sacculus of ballon catheter, along the blood vessel transfer gantry to lesions position, with inflated, after making sacculus prop up support, the sacculus taking-up of cooling down, support then stays in angiostenosis the blood vessel radial support power that provides is provided, dredging vascellum makes restoration of blood flow, and it is strong that it has radial support power, the advantage good with the attaching of blood vessel, but because very outstanding vascular restenosis problem after its implantation, the effect in clinical treatment is restricted.And self expandable type intravascular stent is tiny netted cylinder type, its support is pressed in advance usually and is held in the conduit of carrier, send into narrow blood vessel focal zone by tiny delivery conduit, then when support is pushed out delivery conduit, but the support self expandable is to the diameter of normal blood vessels, strut narrow blood vessel, and keep the unobstructed blood vessel state.Several aspects such as the good and bad main consideration radial support power of intravascular stent, compliance, metal coverage rate, axial cripetura rate, mainly there is following shortcoming in existing medical blood vessel support: one, the axial stretching rate is big, and the position easily changes; Two, the concentrated stress maximum of Wave crest and wave trough occurs fracture easily or produces very large distortion; Three, there are many vascular restenosis problems in the 316L stainless steel that generally adopts after support is implanted.
The utility model content
The purpose of this utility model is the defective at prior art, provides a kind of axial stretching rate little and self expandable intravascular stent not easy fracture.
For solving the problems of the technologies described above, this utility model has designed a kind of self expandable intravascular stent, this support is webmaster shape structure, it has the multilamellar wavy annular structural metal main component of arranging vertically, be formed by connecting by metallic supports between the main component of each layer wavy annular structural metal, described metallic supports is connected between the crest of adjacent layer metallic body member, and two wavelength of being separated by between the two circumferential adjacent metallic supports with one deck are promptly at 90 degree of upwards being separated by in week; The metallic supports interlaced arrangement of adjacent two layers.This support has adopted metallic supports as effectively supporting, and has solved the problem of stress concentration in the big position of deflection effectively; And adjacent two layers inserts support member alternately, can reduce the material of application, makes structure more succinct, can also prevent simultaneously unstability and large deformation problem on the mechanics that excessive concentrated stress causes well.
It is material that described metallic body member and metallic supports are preferably chosen niti-shaped memorial alloy, carries out self expandable, replaces traditional balloon dilation.Ti-Ni marmem has excellent biological compatibility and corrosion resistance, particularly have peculiar super-elasticity and memory performance, soft at 0～10 degree centigrade of following alloy silk, can arbitrary deformation become to be easy to insert shape than fine duct, send into predetermined narrow position in the body by conduit, return to original form rapidly at the body temperature lower carriage, at this moment material hardens, and produce lasting soft restoring force, reach the expansion supporting role.Support is in super bullet state in vivo for a long time, and elastic force does not increase with the increase of modification amount, and it is big to recover the modification amount, and resistance of deformation is moderate, and fatigue behaviour is good, this be other materials can not compare.
Further, the structure that is formed in one of described metallic body member and metallic supports.Preferably, the metallic body member of every layer of wavy annular structure has 8 waveform unit, and the quantity of every layer of metallic supports is 4.Distance between the adjacent layer metallic body member is
Initial diameter before the support expansion is preferably 1mm, and expansion back diameter is preferably 3mm～3.5mm, thereby guarantees that blood vessel is normally unobstructed.Support begins expansion by the 1mm diameter, self is compressed to hour, gets 1/2 of maximum wavelength.
Compared with prior art, this utility model is owing to adopt metallic supports to be connected between the crest of adjacent layer metallic body member, two wavelength of between two circumferential adjacent metallic supports, being separated by with one deck, the metallic supports interlaced arrangement of adjacent two layers, therefore, can effectively improve its radial support power, its axial stretching rate is little, the position is difficult for changing, simultaneously, at concentrated stress maximums such as Wave crest and wave troughs, solved it well and occurred fracture easily or produce the problem of big distortion; And adjacent two layers inserts support member alternately, can reduce the material of application, makes structure more succinct, can also prevent simultaneously unstability and large deformation problem on the mechanics that excessive concentrated stress causes well.
Description of drawings
Fig. 1 is the expansion sketch map of webmaster shape structure of the present utility model;
Fig. 2 is a radial section sketch map of the present utility model.
The specific embodiment
Self expandable intravascular stent shown in Fig. 1 and 2, it is that material is made webmaster shape structure that this support is chosen niti-shaped memorial alloy, it has the multilamellar wavy annular structural metal main component of arranging vertically 1, wherein, the metallic body member 1 of every layer of wavy annular structure has 8 waveform unit, be formed by connecting by metallic supports 2,3 between each layer wavy annular structural metal main component 1, the quantity of every layer of metallic supports is 4, and metallic body member 1 and metallic supports 2,3 are one-body molded in the manufacture process.Described metallic supports 2,3 is connected between the crest of adjacent layer metallic body member, and two wavelength 2 λ of being separated by between the two circumferential adjacent metallic supports 2 with one deck are promptly at 90 degree of upwards being separated by in week; The metallic supports interlaced arrangement of adjacent two layers is in the wavelength X of being separated by between circumferentially adjacent two metallic supports 2 and 3 on the adjacent layer, promptly at 45 degree of upwards being separated by in week; Preferably, the distance between the adjacent layer metallic body member 1 is
Initial diameter before the support expansion is preferably 1mm, and expansion back diameter is preferably 3mm～3.5mm, thereby guarantees that blood vessel is normally unobstructed.Support begins expansion by the 1mm diameter, self is compressed to hour, gets 1/2 of maximum wavelength.
The wire diameter of described metallic body member and metallic supports is preferably 0.1mm, this be because, thickness wiry is exactly the thickness of closing of support, the general judgement heavy wall or the standard of thin-walled are: (t is a wall thickness in t/D＜1/15, D is a bore) be thin-walled, and metal rack minimum diameter 2mm, maximum inner diameter 3mm, in order to control support is thin-wall circular tube, so preferred diameter 0.1mm.
Self expandable intravascular stent of the present utility model adopts Ti-Ni marmem as material, it has excellent biological compatibility and corrosion resistance, particularly have peculiar super-elasticity and memory performance, soft at 0～10 degree centigrade of following alloy silk, can arbitrary deformation become to be easy to insert shape than fine duct, send into predetermined narrow position in the body by conduit, return to original form rapidly at the body temperature lower carriage, this moment material hardens, and produce lasting soft restoring force, reach the expansion supporting role.Support is in super bullet state in vivo for a long time, and elastic force does not increase with the increase of modification amount, and it is big to recover the modification amount, and resistance of deformation is moderate, and fatigue behaviour is good, this be other materials can not compare.
It more than is explanation to this utility model preferred implementation; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the present utility model design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (7)
1. self expandable intravascular stent, be webmaster shape structure, it has the multilamellar wavy annular structural metal main component of arranging vertically, be formed by connecting by metallic supports between the main component of each layer wavy annular structural metal, it is characterized in that: described metallic supports is connected between the crest of adjacent layer metallic body member, two wavelength of between two circumferential adjacent metallic supports, being separated by with one deck, the metallic supports interlaced arrangement of adjacent two layers.
2. self expandable intravascular stent according to claim 1 is characterized in that: described metallic body member and metallic supports are to be made by niti-shaped memorial alloy.
3. self expandable intravascular stent according to claim 1 is characterized in that: described metallic body member and the metallic supports structure that is formed in one.
4. self expandable intravascular stent according to claim 1 is characterized in that: the metallic body member of every layer of wavy annular structure has 8 waveform unit, and the quantity of every layer of metallic supports is 4.
5. self expandable intravascular stent according to claim 1 is characterized in that: the distance between the adjacent layer metallic body member is
6. self expandable intravascular stent according to claim 1 is characterized in that: the initial diameter before this support expansion is 1mm, and expansion back diameter is 3mm～3.5mm.
7. self expandable intravascular stent according to claim 1 is characterized in that: the diameter of described metallic body member and metallic supports is 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620057977 CN2885176Y (en) | 2006-04-20 | 2006-04-20 | A self-expanding vascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620057977 CN2885176Y (en) | 2006-04-20 | 2006-04-20 | A self-expanding vascular stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2885176Y true CN2885176Y (en) | 2007-04-04 |
Family
ID=37960268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620057977 Expired - Fee Related CN2885176Y (en) | 2006-04-20 | 2006-04-20 | A self-expanding vascular stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2885176Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102028530A (en) * | 2010-12-20 | 2011-04-27 | 南京市第一医院 | Minimally invasive bone trabecula metal vertebral stent |
| CN102626528A (en) * | 2012-04-16 | 2012-08-08 | 上海交通大学 | Gradually-expanding intravascular stent |
| CN110662509A (en) * | 2017-03-21 | 2020-01-07 | 恩都思潘有限公司 | Stent graft for sealing around external interferent |
| CN113558835A (en) * | 2020-04-29 | 2021-10-29 | 微创神通医疗科技（上海）有限公司 | Medical stent and stent system |
| WO2022105401A1 (en) * | 2020-11-19 | 2022-05-27 | 上海鸿脉医疗科技有限公司 | Medical stent |
| CN116370186A (en) * | 2023-03-27 | 2023-07-04 | 首都医科大学附属北京同仁医院 | Schlemm's tube expansion bracket and manufacturing method |
-
2006
- 2006-04-20 CN CN 200620057977 patent/CN2885176Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102028530A (en) * | 2010-12-20 | 2011-04-27 | 南京市第一医院 | Minimally invasive bone trabecula metal vertebral stent |
| CN102626528A (en) * | 2012-04-16 | 2012-08-08 | 上海交通大学 | Gradually-expanding intravascular stent |
| CN110662509A (en) * | 2017-03-21 | 2020-01-07 | 恩都思潘有限公司 | Stent graft for sealing around external interferent |
| CN110662509B (en) * | 2017-03-21 | 2021-10-26 | 恩都思潘有限公司 | Stent graft for sealing around external interferent |
| CN113558835A (en) * | 2020-04-29 | 2021-10-29 | 微创神通医疗科技（上海）有限公司 | Medical stent and stent system |
| WO2022105401A1 (en) * | 2020-11-19 | 2022-05-27 | 上海鸿脉医疗科技有限公司 | Medical stent |
| CN116370186A (en) * | 2023-03-27 | 2023-07-04 | 首都医科大学附属北京同仁医院 | Schlemm's tube expansion bracket and manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2885176Y (en) | A self-expanding vascular stent | |
| CN102525701B (en) | Absorbable blood vessel stent | |
| US20090099652A1 (en) | Composite Vascular Prosthesis | |
| CN101703812B (en) | Polyamide 66 membrane covered nickel-titanium alloy intravascular scaffold and preparation method thereof | |
| CN101014300A (en) | Metallic drug-releasing medical devices and method of making same | |
| CN101299977B (en) | Stent for temporary fitting in a body cavity | |
| CN105726174B (en) | A kind of intravascular stent, preparation method and application | |
| WO2015090237A1 (en) | Vascular stent and method for manufacturing same | |
| CN106691647B (en) | A kind of biodegradable metals intravascular stent and its application | |
| CN102697587A (en) | Biodegradable bracket and preparation method thereof | |
| CN108498208B (en) | Blood vessel support suitable for artery blood vessel | |
| CN201055442Y (en) | Novel blood vessel support | |
| CN201008590Y (en) | Blood vessel bracket with super elastic force | |
| CN204169954U (en) | A kind of degradable human body alimentary canal support that effectively can prevent displacement, reduce hypertrophy | |
| CN210384118U (en) | Blood vessel support for arterial stenosis | |
| CN106176003B (en) | A kind of intravascular stent, preparation method and application | |
| CN209827116U (en) | Recyclable medicine support | |
| CN201968866U (en) | Absorbable blood vessel support | |
| CN202761483U (en) | Biodegradable stent | |
| CN214761637U (en) | Peripheral blood vessel stent | |
| CN210301318U (en) | Intracranial drug bracket | |
| CN109602523B (en) | Recoverable medicine support | |
| JP5871790B2 (en) | Stent | |
| CN208552143U (en) | A kind of endovascular stent and product | |
| CN207137138U (en) | A kind of medicine-coated balloon bracket component |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |