CN1163280C - Internal flexible supporter for tracts or cavities in human body - Google Patents
Internal flexible supporter for tracts or cavities in human body Download PDFInfo
- Publication number
- CN1163280C CN1163280C CNB991130030A CN99113003A CN1163280C CN 1163280 C CN1163280 C CN 1163280C CN B991130030 A CNB991130030 A CN B991130030A CN 99113003 A CN99113003 A CN 99113003A CN 1163280 C CN1163280 C CN 1163280C
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- Prior art keywords
- line segment
- flexible pipe
- unit
- circle
- equal
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- 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 - Lifetime
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- 239000000463 material Substances 0.000 claims description 6
- 229910052715 tantalum Inorganic materials 0.000 claims description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 3
- 210000004777 protein coat Anatomy 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 210000000056 organ Anatomy 0.000 abstract description 2
- 210000004204 blood vessel Anatomy 0.000 description 10
- 230000017531 blood circulation Effects 0.000 description 4
- 208000007536 Thrombosis Diseases 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000000709 aorta Anatomy 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 208000001435 Thromboembolism Diseases 0.000 description 1
- 208000036142 Viral infection Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000008069 intimal proliferation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- 230000000414 obstructive effect Effects 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 210000002307 prostate Anatomy 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 210000003708 urethra Anatomy 0.000 description 1
- 230000002485 urinary effect Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Abstract
The present invention relates to an internal flexible supporter for tracts or cavities. The present invention is characterized in that the internal net-shaped flexible supporter for tracts or cavities is formed by orderly arranging a unit pattern in the radial direction and the axial direction of a tract; the unit pattern is composed of a circular, two quarter arcs, a one-half arc and straight line segments, wherein the radius of the circular is R, the radiuses of the two quarter arcs and the one-half arc are r, the length of two of the straight line segments are L0, and the lengths of another two straight line segments are respectively L1, L2. The quarter arc, the line segment L0, the one-half arc, the line segment L0, the quarter arc are orderly and smoothly connected to form an axisymmetric curved segment which is axially connected with the straight line segment L1, the circular R and the straight line segment L2 to form a longitudinal axisymmetric unit circular, wherein the R, the r, the L0, the L1, the L2, the width W of a connecting wire and an original tract diameter have the following relations: R is less than or equal to d: n, r is less than or equal to 5W, L0 is less than or equal to r, L1 is more than or equal to 3R, L2 is less than or equal to r, and the n is the number of unit patterns. The present invention has the advantages of smooth surface without a local convex node, good radial expanding and axial bending performance and little damage to organs.
Description
Technical field
The invention belongs to technical field of medical instruments, a kind of internal flexible supporter for tracts or cavities in human body is provided especially.
Background technology
Internal flexible supporter for tracts or cavities in human body is meant device in all kinds of tube chambers of getting involved hat tremulous pulse and aorta vessel and systems such as digestion, urinary system, reproduction and breathing, to guarantee that tube chamber is unimpeded, prevents tube chamber adhesion, narrow and thromboembolism.This interventional therapy is a kind of clinical new technique of conventional surgical operation that replaces, and it is to utilize special catheter delivery system, along blood vessel expandable stent is caused the thrombosis place by the epidermis puncture, makes this place's blood vessel differentially expanding, reaches the purpose of reconstructing blood vessel.This technology is Gianturco in 1986 and Sigwart development, and successfully is applied to clinical at first in 1987.
Because of the thrombosis infraction developed rapidly in recent years with other cardiovascular stenosis or obstructive disease, expand body lumen various aspects such as aorta, cranium tremulous pulse, prostate and urethra to.Get involved the intraluminal stent performance requirement, at first require support to have certain intensity and axial bending and radial dilatation morphotropism and will get well (promptly flexible), next requires the pipe support material that good blood compatibility and persistent corrosion resistance are arranged, the 3rd is that the rack surface requirement is inertia and bright and clean especially, can reduce or prevent intimal proliferation reaction in thrombosis and the blood vessel.This technical field has been delivered a series of patent and document both at home and abroad, conclude to get up using 316L (00Cr17Ni14Mo2) rustless steel and niti-shaped memorial alloy aspect the timbering material more, this two classes alloy is owing to contain a large amount of Ni, (virose nickel ion dissociates) meeting and human body generation reciprocal action in long-term the placement.The manufacturing technology of supporting structure mostly is the braiding of alloy silk and forms, and minority is that tubing cuts into network structure.Though above-mentioned two class formations all can play the tube chamber supporting role, all exist the shortcoming of self, for example:
The silk netting shape structure (CN2304419Y Wang Huaimao):
This structure is influenced by blood flow owing to exist intersection wiry, relative motion can take place cross-wires, the friction blood vessel wall, and life-time service causes the blood vessel pathological changes, and in addition, this network structure is radial contraction very easily, and support strength is not enough.
Silk compile lead angle U-shaped structure (CN1187115A thinks to help, Bo Erji):
Though this structure radial tension is greater than network structure, during radial dilatation, the axial shrinkage circle is bigger, and any weaving method no matter, and its termination all must welding, and this solder joint easily snaps, and sharp tinsel termination can puncture blood vessel wall.
Pipe joint-cutting self expandable structure (CN1210021A Shape Memory Materials Engineering Research Center, Tianjin Univ., Liu Wenxi, Du Zhimin):
Though this structure has remedied the shortcoming of metal wire knitted and since joint-cutting be stretched as netted after, its netting twine all not on the face of cylinder, has only node as the strong point, contact surface is little, local pressure is excessive, life-time service also can cause the blood vessel wall local patholoic change.
Summary of the invention
The object of the present invention is to provide a kind of internal flexible supporter for tracts or cavities in human body, its surface smoothing does not have the local node that protrudes, and radial dilatation and axial bending performance are good, and be few to organ injury.
The invention provides a kind of flexible pipe intracavity stent, it is characterized in that: this flexible pipe intracavity stent is to be made of along circumference and axial ordered arrangement the side surface of a kind of unit figure at pipe; The unit figure of forming support constitutes: a segment length is L
2Line segment, the one end links to each other with the annulus that an outer radius is R, the extended line of this line segment overlaps with the diameter of annulus; At the other end of annulus, connecting a length is L
1Line segment, this line segment and L
2On same straight line; Line segment L
1The other end, with an outer radius be that 1/2 circle of r intersects, and center of circle of this 1/2 circle is at line segment L
1On; This outer radius is the circular arc two ends of 1/2 circle of r, is L with length respectively
0The smooth connection of two line segment phases, no flex point, and L
0With L
2Parallel; At two L
0The other end of line segment, respectively with an outer radius be r 1/4 the circle the camber line end link to each other camber line and L
0Tangent, and the other end of camber line is away from L
2Unit figure is arranged on the face of cylinder, forms the closed figure on the face of cylinder, and the axially-aligned of this closed figure forms the population structure of this flexible pipe intracavity stent, R, r, L in graphic structure
0, L
1, L
2And there is following relation: R≤d/n, r≤5W, L between twine width W and the support green diameter d
0≤ r, L
1〉=3R, L
2≤ r, n are the unit figure number on the circumference.
The material of flexible reticulated endovascular stent described in the present invention is tantalum or plating tantalum rustless steel or marmem; Be the compatibility of enhancing with human body, described endoluminal stent scribbles the organic protein coating compatible with human body outward.
Material therefor of the present invention is tantalum or plating tantalum rustless steel and marmem, and this material has good intensity and activity, has fine inertia, corrosion resistance simultaneously, does not separate out harmful substance with the long-term coexistence mutually of tissue.
Constitute all netting twines of this figure support among the present invention on the face of cylinder, there is not local pointed protrusion, support strength is good, and the flexible and crooked back supporting surface of circular-arc connection netting twine still is a smooth surface, to the wall of the lumen not damaged, can not having axial dimension during radial dilatation shrinks, make that the support radial dilatation is fricton-tight at blood vessel, and radially the expandable size scope is big, the support axial end has the direction opposite sex, the self expandable characteristic is arranged, can control support antegrade blood flow direction and produce local displacement and not slippage.
Description of drawings
By embodiment in detail the present invention is described in detail below in conjunction with accompanying drawing.
Accompanying drawing 1 is the support axonometric chart.
Accompanying drawing 2 launches plane graph for support.
Accompanying drawing 3 is the carrier unit structure chart.
Accompanying drawing 4 is the crooked figure of support.
Accompanying drawing 5 is support maximum radial expansion expanded view.
The specific embodiment
Embodiment
As shown in Figure 1, circle intersects receipts or other documents in duplicate element pattern structure with circular arc among Fig. 3, axially each radially repeats ordered arrangement at pipe with this cellular construction figure processing, just constituted the flexible good reticulated endovascular stent of a kind of novel flexible and self expandable, this new structure figure support has following advantage:
1. all netting twines that constitute this figure support do not have local pointed protrusion on the face of cylinder, support strength is good.As Fig. 2, Fig. 3.
Caliber is the radial unit figure number of d (n)
N=π d/4r r: the radius of unit figure semicircle
Be assurance proper supporting intensity and flexibility, in the unit figure, straightway L
0≤ r, L
1〉=3R, L
2≤ r, r≤5W, W: netting twine width.Guarantee that it is R≤d/n that the radially annulus of unit figure does not overlap the R size when support is crooked in flexural deformation.
2. the flexible and crooked back supporting surface of circular-arc connection netting twine still is a smooth surface, and to the wall of the lumen not damaged, length is L, and the support of M unit figure is axially arranged, and maximum flexible angle is α, sees Fig. 4.
α≤(M/d)(πR-2W)≤M(π/n)-2W/d
Wherein: d (mm) is the former pipe diameter of support;
R (mm) is a radius of a circle in the unit figure;
W (mm) is a support netting twine width;
M is the support shaft unit figure number that makes progress.
3. can not have axial dimension during radial dilatation and shrink, as shown in Figure 5, make that the support radial dilatation is fricton-tight at blood vessel, and radially the expandable size scope is big, expansible full-size D,
D＝(d/2r)(L
0+πr)
4. the support axial end has the direction opposite sex, as Fig. 2.The netted circular arc connectionless point of support A end has the self expandable characteristic, the port of export of A end as the support blood flow can be able to be controlled support antegrade blood flow direction and produced local displacement and not slippage.
Claims (3)
1. flexible pipe intracavity stent, it is characterized in that: this flexible pipe intracavity stent is to be made of along circumference and axial ordered arrangement the side surface of a kind of unit figure at pipe; The unit figure of forming support constitutes: a segment length is L
2Line segment, the one end links to each other with the annulus that an outer radius is R, the extended line of this line segment overlaps with the diameter of annulus; At the other end of annulus, connecting a length is L
1Line segment, this line segment and L
2On same straight line; Line segment L
1The other end, with an outer radius be that 1/2 circle of r intersects, and center of circle of this 1/2 circle is at line segment L
1On; This outer radius is the circular arc two ends of 1/2 circle of r, is L with length respectively
0The smooth connection of equal two line segment phases, no flex point, and L
0With L
2Parallel; At two L
0The other end of line segment, respectively with an outer radius be r 1/4 the circle the camber line end link to each other camber line and L
0Tangent, and the other end of camber line is away from L
2Unit figure is arranged on the face of cylinder, forms the closed figure on the face of cylinder, and the axially-aligned of this closed figure forms the population structure of this flexible pipe intracavity stent, R, r, L in graphic structure
0, L
1, L
2And there is following relation: R≤d/n, r≤5W, L between twine width W and the support green diameter d
0≤ r, L
1〉=3R, L
2≤ r, n are the unit figure number on the circumference.
2. according to the described flexible pipe intracavity stent of claim 1, it is characterized in that: the material of described flexible pipe intracavity stent is respectively tantalum, plating tantalum rustless steel or marmem pipe and directly cuts and make after the processing.
3. according to claim 1 or 2 described flexible pipe intracavity stents, it is characterized in that: described flexible pipe intracavity stent scribbles the protein coat compatible with human body outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991130030A CN1163280C (en) | 1999-06-11 | 1999-06-11 | Internal flexible supporter for tracts or cavities in human body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991130030A CN1163280C (en) | 1999-06-11 | 1999-06-11 | Internal flexible supporter for tracts or cavities in human body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1238220A CN1238220A (en) | 1999-12-15 |
| CN1163280C true CN1163280C (en) | 2004-08-25 |
Family
ID=5276242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991130030A Expired - Lifetime CN1163280C (en) | 1999-06-11 | 1999-06-11 | Internal flexible supporter for tracts or cavities in human body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1163280C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103356308A (en) * | 2013-07-11 | 2013-10-23 | 山东大学 | Array fiber opto-acoustic bionic ear device and signal conversion method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110151306A (en) * | 2019-05-17 | 2019-08-23 | 杭州睿笛生物科技有限公司 | A kind of electric pulse parallel pole |
-
1999
- 1999-06-11 CN CNB991130030A patent/CN1163280C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103356308A (en) * | 2013-07-11 | 2013-10-23 | 山东大学 | Array fiber opto-acoustic bionic ear device and signal conversion method |
| CN103356308B (en) * | 2013-07-11 | 2015-05-20 | 山东大学 | Array fiber opto-acoustic bionic ear device and signal conversion method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1238220A (en) | 1999-12-15 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ADVISORY ASSET INVESTMENT MANAGEMENT CO., LT Free format text: FORMER OWNER: METAL INST., CHINESE ACADEMY OF SCIENCES Effective date: 20090918 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090918 Address after: Tower 18, Henderson Center, No. 1703 inner main street, Beijing, Jianguomen Patentee after: National Asset Management Consulting Co., Ltd. Address before: No. 72, Wenhua Road, Shenhe District, Liaoning, Shenyang Patentee before: Institute of metal research, Chinese Academy of Sciences |
|
| ASS | Succession or assignment of patent right |
Owner name: ZHONGKE YI'AN MEDICAL TECHNOLOGY (BEIJING) CO., LT Free format text: FORMER OWNER: GUOZI ASSETS INVESTMENT MANAGEMENT CO., LTD. Effective date: 20111020 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100005 DONGCHENG, BEIJING TO: 103318 SHUNYI, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111020 Address after: 103318 Beijing city Shunyi District Airport Development Zone B Anxiang Street No. 2 An Tai Technology Park incubator building six floor East Patentee after: In the Department of science and Technology (Beijing) Yian Medical Co. Ltd. Address before: 100005, 18, Henderson central office building, No. 1703 inner main street, Beijing, Jianguomen Patentee before: National Asset Management Consulting Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 103318 Beijing city Shunyi District Airport Development Zone B Anxiang Street No. 2 An Tai Technology Park incubator building six floor East Patentee after: In the Department of medical technology (Beijing) Limited by Share Ltd EON Address before: 103318 Beijing city Shunyi District Airport Development Zone B Anxiang Street No. 2 An Tai Technology Park incubator building six floor East Patentee before: In the Department of science and Technology (Beijing) Yian Medical Co. Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20040825 |