CN111345925B - Blood vessel support - Google Patents
Blood vessel support Download PDFInfo
- Publication number
- CN111345925B CN111345925B CN202010123375.2A CN202010123375A CN111345925B CN 111345925 B CN111345925 B CN 111345925B CN 202010123375 A CN202010123375 A CN 202010123375A CN 111345925 B CN111345925 B CN 111345925B
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- Prior art keywords
- connecting rib
- wedge
- adsorption
- vascular stent
- support
- 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.)
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- 210000004204 blood vessel Anatomy 0.000 title description 8
- 238000001179 sorption measurement Methods 0.000 claims abstract description 20
- 230000002792 vascular Effects 0.000 claims abstract description 12
- 230000002441 reversible effect Effects 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 210000001367 artery Anatomy 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000002337 anti-port Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 208000037803 restenosis Diseases 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 201000001320 Atherosclerosis Diseases 0.000 description 1
- 206010053648 Vascular occlusion Diseases 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 208000019553 vascular disease Diseases 0.000 description 1
- 231100000216 vascular lesion Toxicity 0.000 description 1
- 208000021331 vascular occlusion disease Diseases 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/92—Stents in the form of a rolled-up sheet expanding after insertion into the vessel, e.g. with a spiral shape in cross-section
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
本发明为一种新型血管支架，包括若干段环形的吸附条，相邻两段所述吸附条之间通过若干连接结构连接形成支架本体，所述连接结构包括盘体、连接筋和若干固定设置在所述盘体上的楔形块，所述连接筋转动设置在所述盘体上，且所述连接筋的两端分别转动连接在相邻的所述吸附条上，所述楔形块用于限制相邻的吸附条向扩张方向的反向运动。本发明的血管支架本体在撑开的过程中，连接筋可沿着楔形块斜面向上运动，随着两根连接筋之间的角度变大，连接筋跨过楔形块最高点后，下落并被楔形块限制反向运动。由于连接筋无法跨过楔形块再向回运动，从而控制血管支架本体在扩张后不会发生回弹，优化了血管支架本体对于再狭窄动脉介入治疗的效果。
The present invention is a novel vascular stent, comprising several segments of annular adsorption strips, and two adjacent segments of the adsorption strips are connected by several connecting structures to form a stent body. A wedge-shaped block on the disk body, the connecting rib is rotatably arranged on the disk body, and both ends of the connecting rib are rotatably connected to the adjacent adsorption bars, and the wedge-shaped block is used for Restricts the opposite movement of adjacent suction strips in the direction of expansion. During the opening process of the stent body of the present invention, the connecting rib can move upward along the slope of the wedge-shaped block. Wedge blocks limit reverse movement. Since the connecting rib cannot move back across the wedge-shaped block, the vascular stent body can be controlled to not rebound after expansion, and the effect of the vascular stent body on the interventional treatment of restenotic arteries is optimized.
Description
Technical Field
The invention relates to the field of vascular interventional medical treatment, in particular to a vascular stent.
Background
Stent intervention, a major method for treating atherosclerosis, improving vascular occlusion and other vascular diseases of interest, is accepted by more and more doctors and patients, and is a tiny reticular structure formed by expanding a stent by using a balloon in a vascular lesion area so as to make blood in the segment of the lumen normally circulate. After the sacculus expansion, the irreversible plastic deformation should take place for the support theoretically to guarantee the operation effect of support intervention art, nevertheless because the material of support, the influence of structure and other aspects, the support still can exist the expansion incomplete, dog bone effect, kick-back scheduling problem after the expansion, thoroughly improve these problems, need follow the current support of structural optimization, consequently, research out a section and solve through changing current supporting structure and kick-back after the expansion, the support of dog bone effect scheduling problem has very important meaning.
Disclosure of Invention
The invention provides a vascular stent, which aims to solve the problem of rebound after expansion of the existing vascular stent, and comprises a plurality of sections of annular adsorption strips, wherein two adjacent sections of adsorption strips are connected through a plurality of connecting structures to form a stent body, each connecting structure comprises a disk body, a connecting rib and a plurality of wedge-shaped blocks fixedly arranged on the disk body, the connecting ribs are rotatably arranged on the disk body, two ends of each connecting rib are respectively and rotatably connected to the adjacent adsorption strips, and the wedge-shaped blocks are used for limiting reverse movement of the adjacent adsorption strips in the expansion direction.
Preferably, every connection structure has two the splice bar, and two splice bar cross arrangement, all be equipped with on the splice bar and prevent two the splice bar mutual interference's the groove of stepping down, the degree of depth in groove of stepping down does half of splice bar thickness, two the groove of stepping down sets up relatively, two the splice bar passes through the rivet riveting and is in on the disk body. The depth of the abdicating groove is half of the thickness of the connecting ribs, so that the lowest positions of the two connecting ribs are flush. And meanwhile, the abdicating groove facilitates the cross rotation of the two connecting ribs, and space is reserved for the rotation of the connecting ribs, so that the rotation is more reliable.
Further, in order to maximize the rotation angle of the connecting rib, the center of the receding groove is concentric with the riveting position.
Preferably, the wedge block includes guide part and spacing portion, the direction of guide part to spacing portion with when the support body expands the splice bar rotation direction is unanimous, adsorb behind the strip expansion spacing portion restriction the splice bar is to the antiport. The guide part can be an arc surface, a curved surface, an inclined surface and the like, and the included angle between the limiting part and the bottom of the wedge-shaped block can be larger than 90 degrees and smaller than 180 degrees.
Furthermore, the height of the limiting part is higher than the thickness of the thinnest part of the connecting rib, and the height of the limiting part is smaller than the thickness of the thickest part of the connecting rib. When the expansion of blood vessel support body, two adjacent absorption strip between apart from the grow promptly, the splice bar begins to rotate, angle grow between two splice bars, and the splice bar removes along the guide part and supports spacing portion until the splice bar, and spacing portion highly is higher than the thickness of the thinnest department of splice bar just is less than the thickness of the thickest department of splice bar guarantees that the wedge blocks stably blocks the splice bar, makes it can not the motion backward to can not kick-back after guaranteeing the support expansion.
Preferably, the guide portion is an inclined surface, the inclined direction of the inclined surface is consistent with the rotation direction of the connecting rib, and the limiting portion is a vertical surface perpendicular to the rotation direction of the connecting rib. The limiting portion is perpendicular to the connecting rib rotating direction is used as an example for explanation, and the limiting portion is perpendicular to the connecting rib rotating direction, namely perpendicular to the disc body, so that the contact surface of the connecting rib and the limiting portion is larger, the wedge-shaped block is guaranteed to stably clamp the connecting rib, and the connecting rib cannot move backwards.
Further, the disc body is 0.03mm in thickness and 0.27mm in radius.
Preferably, the adsorption strip is made of medical stainless steel or nickel-titanium alloy material.
Further, the adsorption strip is wavy.
Has the advantages that: in the process of opening the intravascular stent body, the connecting ribs can move upwards along the inclined surface of the wedge-shaped block, and the connecting ribs fall down and are limited by the wedge-shaped block to move reversely after crossing the highest point of the wedge-shaped block along with the increase of the angle between the two connecting ribs. Because the connecting rib can not stride across the wedge-shaped block and move back again, the blood vessel support body can not be rebounded after being expanded, and the effect of the blood vessel support body on the interventional therapy of the restenosis artery is optimized.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the tie bar of the present invention assembled with a tray (the tie bar has been rotated past a wedge);
FIG. 3 is an overall expanded view of the present invention;
FIG. 4 is a schematic view of the tray structure of the present invention;
1. an adsorption strip; 2. connecting ribs; 3. riveting; 4. a wedge block; 5. a tray body; 6. a guide portion; 7. a limiting part; 8. a yielding groove.
Detailed Description
As shown in the figure, a blood vessel support, including a plurality of sections annular absorption strip 1, adjacent two sections it forms the support body to connect through a plurality of connection structure between the absorption strip 1, connection structure includes disk body 5, splice bar 2 and a plurality of fixed setting and is in wedge 4 on the disk body 5, splice bar 2 rotates and sets up on the disk body 5, just the both ends of splice bar 2 rotate respectively and connect adjacently adsorb on the strip 1, wedge 4 is used for restricting adjacent absorption strip 1 to the reverse motion of expansion direction. (as shown in fig. 1 to 3, the embodiment is described with 8 wedge-shaped blocks 4, and the distances from the 8 wedge-shaped blocks 4 to the center of the disk 5 are equal, that is, two wedge-shaped blocks 4 are disposed on one side of the tie bar 2).
Every connection structure has two splice bar 2, and 2 cross arrangement of two splice bars, all be equipped with on the splice bar 2 and prevent two 2 mutual interference's of splice bar groove 8 of stepping down, the degree of depth in groove 8 of stepping down does half of 2 thicknesses of splice bar, two the groove 8 of stepping down sets up, two relatively the splice bar 2 is in through 3 rivets on the disk body 5. The center of the abdicating groove 8 is concentric with the riveting position. Wedge 4 includes guide part 6 and spacing portion 7, guide part 6 to spacing portion 7 the direction with during the support body expansion 2 rotation direction of splice bar are unanimous, adsorb 1 expansion back of strip spacing portion 7 restriction 2 are to the antiport of splice bar. The height of the limiting part 7 is higher than the thickness of the thinnest part of the connecting rib 2, and the height of the limiting part 7 is smaller than the thickness of the thickest part of the connecting rib 2. The guide part 6 is an inclined plane, the inclined direction of the inclined plane is consistent with the rotation direction of the connecting rib 2, and the limiting part 7 is perpendicular to the vertical surface of the rotation direction of the connecting rib 2 (as shown in fig. 4, the guide part 6 is an inclined plane, and the limiting part 7 is perpendicular to the vertical surface of the rotation direction of the connecting rib 2). The thickness of the disc body 5 is 0.03mm, and the radius is 0.27 mm. The adsorption strip 1 is made of medical stainless steel or nickel-titanium alloy material. The adsorption strip 1 is wave-shaped.
The working principle is as follows: after the intravascular stent body does not expand or the connecting rib 2 strides over a wedge 4, (as shown in fig. 2, the connecting rib 2 strides over a wedge 4), sacculus when in the blood expands gradually, the adsorption strip 1 opens, the connecting rib 2 can upwards move along the direction of the wedge 4, the connecting rib 2 overturns the inclined plane, the connecting rib 2 falls back to the spacing portion 7 of the wedge 4, the spacing face of the wedge 4 is perpendicular to the direction of rotation, so that the connecting rib 2 can not move reversely, thus, the opening angle of the connecting rib 2 can only be enlarged, and the connecting rib can not be reduced. Therefore, the whole blood vessel support body can be controlled not to rebound after expansion, and the effect of the blood vessel support body on the interventional therapy of the restenosis artery is optimized.
Claims (5)
1. A vascular stent, characterized by: the support comprises a plurality of sections of annular adsorption strips (1), two adjacent sections of adsorption strips (1) are connected through a plurality of connecting structures to form a support body, each connecting structure comprises a tray body (5), a connecting rib (2) and a plurality of wedge blocks (4) fixedly arranged on the tray body (5), the connecting ribs (2) are rotatably arranged on the tray body (5), two ends of each connecting rib (2) are respectively and rotatably connected to the adjacent adsorption strips (1), and the wedge blocks (4) are used for limiting reverse movement of the adjacent adsorption strips (1) to the expansion direction;
each connecting structure is provided with two connecting ribs (2), the two connecting ribs (2) are arranged in a crossed mode, the connecting ribs (2) are respectively provided with a abdicating groove (8) for preventing the two connecting ribs (2) from interfering with each other, the depth of each abdicating groove (8) is half of the thickness of the connecting rib (2), the two abdicating grooves (8) are oppositely arranged, and the two connecting ribs (2) are riveted on the tray body (5) through rivets (3);
the centers of the two abdicating grooves (8) are concentric with the riveting position;
the wedge-shaped block (4) comprises a guide part (6) and a limiting part (7), the direction from the guide part (6) to the limiting part (7) is consistent with the rotation direction of the connecting rib (2) when the support is expanded, and the limiting part (7) limits the connecting rib (2) to rotate reversely after the adsorption strip (1) is expanded;
the guide portion (6) is an inclined surface, the upward direction of the inclined surface is consistent with the rotation direction of the connecting rib (2) when the support is expanded, and the limiting portion (7) is a vertical surface perpendicular to the rotation direction of the connecting rib (2) when the support is expanded.
2. A vascular stent as in claim 1, wherein: the height of the limiting portion (7) is higher than the thickness of the thinnest position of the connecting rib (2), and the height of the limiting portion (7) is smaller than the thickness of the thickest position of the connecting rib (2).
3. A vascular stent as in claim 1, wherein: the thickness of the disc body (5) is 0.03mm, and the radius is 0.27 mm.
4. A vascular stent as in claim 1, wherein: the adsorption strip (1) is made of medical stainless steel or nickel-titanium alloy material.
5. A vascular stent as in claim 1, wherein: the adsorption strip (1) is wave-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010123375.2A CN111345925B (en) | 2020-02-27 | 2020-02-27 | Blood vessel support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010123375.2A CN111345925B (en) | 2020-02-27 | 2020-02-27 | Blood vessel support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111345925A CN111345925A (en) | 2020-06-30 |
| CN111345925B true CN111345925B (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010123375.2A Active CN111345925B (en) | 2020-02-27 | 2020-02-27 | Blood vessel support |
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| Country | Link |
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| CN (1) | CN111345925B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114424991B (en) * | 2022-01-21 | 2024-08-30 | 江苏理工学院 | Novel vascular stent |
| CN115624422B (en) * | 2022-12-19 | 2023-04-07 | 北京心祐医疗科技有限公司 | Blood vessel support |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105796208A (en) * | 2016-03-09 | 2016-07-27 | 北京工业大学 | Vascular stent with circumferential supporting bars |
| WO2016167002A1 (en) * | 2015-04-17 | 2016-10-20 | 株式会社カネカ | Medical tubular body |
| CN107280826A (en) * | 2017-06-01 | 2017-10-24 | 北京工业大学 | Joinery and its construction brace rod intravascular stent |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7141063B2 (en) * | 2002-08-06 | 2006-11-28 | Icon Medical Corp. | Stent with micro-latching hinge joints |
| US11026785B2 (en) * | 2017-06-05 | 2021-06-08 | Edwards Lifesciences Corporation | Mechanically expandable heart valve |
-
2020
- 2020-02-27 CN CN202010123375.2A patent/CN111345925B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016167002A1 (en) * | 2015-04-17 | 2016-10-20 | 株式会社カネカ | Medical tubular body |
| CN105796208A (en) * | 2016-03-09 | 2016-07-27 | 北京工业大学 | Vascular stent with circumferential supporting bars |
| CN107280826A (en) * | 2017-06-01 | 2017-10-24 | 北京工业大学 | Joinery and its construction brace rod intravascular stent |
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| Publication number | Publication date |
|---|---|
| CN111345925A (en) | 2020-06-30 |
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