CN210077946U - Peripheral blood vessel stent - Google Patents
Peripheral blood vessel stent Download PDFInfo
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- CN210077946U CN210077946U CN201920528840.3U CN201920528840U CN210077946U CN 210077946 U CN210077946 U CN 210077946U CN 201920528840 U CN201920528840 U CN 201920528840U CN 210077946 U CN210077946 U CN 210077946U
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Abstract
The utility model provides a peripheral blood vessel support, the cross section of which is of an annular structure, the support comprises a spring support and a net-shaped support, the cylindrical spring support and the cylindrical net-shaped support are arranged alternately, one or more strip-shaped limit hooks are arranged on the support, one end of each limit hook is fixed on the spring support, the other end of each limit hook is provided with a hook, and the hook can be hooked on the net-shaped support; the spring support is rich in elasticity, can adjust the holistic length of support, when using, according to the condition of focus, can be with spacing hook's couple hook on netted support, and then realize the purpose of adjusting the whole length of support. The utility model discloses set up netted support between spring bracket, hook spring bracket through spacing hook, length and radian according to the focus condition adjustment support that can make things convenient for in a flexible way. The utility model discloses avoided the support need promote treatment effeciency according to the problem that the focus condition was customized when the treatment, reduced the risk that the patient appears unexpected in the middle of the waiting process.
Description
Technical Field
The utility model relates to the technical field of medical equipment, a peripheral vascular stent capable of flexibly adjusting length is provided very much.
Background
Due to the irregular daily work and rest and the increased pressure of life and work, vascular diseases are at present in a high-grade development process. Every second in the rescue process is of great importance, as vascular diseases have high risk of acute attack, no symptom before the attack, untimely treatment after the attack or sequelae due to the treatment. However, the existing stent is basically integrally formed, the length and the like of the formed stent are basically not adjustable, and the stent can only be suitable for the illness state of most patients. If special conditions are met, the treatment means is complex, and the optimal treatment opportunity may be missed.
In particular peripheral vascular disease, which is a common manifestation of systemic atherosclerosis, can induce systemic arteriosclerosis and cardiovascular morbidity. After the peripheral blood vessels are diseased, the blood vessel cavity becomes narrow, the blood flow injected into the lower limbs becomes small, the blood supply of the lower limbs is insufficient, and the limbs are necrotized. Venous diseases mainly comprise various diseases such as vein stenosis, vein thrombosis and vein reflux. Particularly, the vein is easy to be compressed by the artery to cause the lumen stenosis, for example, the left common iliac vein is compressed by the right common iliac artery and the fifth lumbar vertebra together, and the continuous mechanical compression and the artery pulsation cause the vein intracavity adhesion, intimal hyperplasia and fibrosis.
The mainstream emergency treatment method of peripheral vascular diseases is surgical treatment, and most of the methods are endovascular intervention treatment. The currently adopted interventional therapy devices mainly comprise a balloon expandable stent and a self-expandable stent. The existing support has weak supporting force, the length of the support cannot be adjusted according to the specific illness state of a patient, and the perfect unification of the technical indexes cannot be well realized.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a peripheral blood vessel support, this support holding power obtains promoting, and can be according to the length of the nimble adjustment support of the specific state of an illness of patient.
The utility model particularly provides a peripheral vascular stent, its cross section is the loop configuration, its characterized in that: the support comprises a spring support 1 and a net-shaped support 2, the cylindrical spring support 1 and the cylindrical net-shaped support 2 are arranged alternately, one or more strip-shaped limiting hooks 3 are arranged on the support, one end of each limiting hook 3 is fixed on the spring support 1, and the other end of each limiting hook is provided with a hook which can be hooked on the net-shaped support 2; spring bracket 1 is rich in elasticity, can adjust the holistic length of support, when using, according to the condition of focus, can be with spacing hook 3's couple on netted support 2, and then realize the purpose of adjusting the holistic length of support.
The outer surface of the spring support 1 is respectively attached with a medicine layer 4 and a film coating layer 5, and the film coating layer 5 is provided with a medicine release port 6.
The reticular stent 2 is formed by arranging a plurality of wavy support rings 201 perpendicular to the axial direction of the stent, the support rings 201 are connected through a buffer connecting piece 202, the outer surfaces of the support rings 201 and the connecting piece 202 are respectively attached with a drug layer 4 and a film layer 5, and the film layer 5 is provided with a drug release port 6.
The two ends of the peripheral blood vessel support are of closed buckling structures so as to prevent the end of the spring support 1 from scratching blood vessels.
As a preferred technical scheme:
The supporting rings 201 of the net support 2 are of an X-shaped structure and/or a W-shaped structure, and the central points of the different supporting rings 201 are connected through a buffer connecting piece 202.
The buffer connector 202 may be a double ring structure, the outer surface of which is attached with a drug layer 4 and a film layer 5, respectively, and the film layer 5 is provided with a drug release port 6.
The whole buffer connecting piece 202 can also be in a structure like a Chinese character 'shan', and is composed of an upside-down U-shaped structure, the outer surface of the buffer connecting piece is respectively attached with a medicine layer 4 and a film coating layer 5, and the film coating layer 5 is provided with a medicine release port 6.
One or more of the spring support 1, the reticular support 2 and the limiting hook 3 are made of alloy materials with low melting point (40-45 ℃).
One or more of the spring support 1, the reticular support 2 and the limiting hook 3 are made of degradable polylactic acid fiber.
The coating layer 5 is specifically an acrylate polymer film.
Two limiting hooks 3 are arranged on each spring support 1 and are axially and symmetrically distributed relative to the peripheral vascular support.
The hook on the limit hook 3 is a circular ring with a notch.
The gap direction of the hook 3 of the limit hook faces the inside of the net-shaped support 2.
The utility model discloses in, the cross-sectional area more than or equal to spring bracket 1 of net support 2, wherein spring bracket 1 has better bending property, and net support 2 has better support performance, when two or two above thrombi are near apart from the time, can implant a longer periphery vascular support to adjust through spacing hook 3 and make the bigger net support of holding power 2 set up in thrombus department, in order to implant many supports repeatedly at a plurality of thrombus positions nearer apart from.
The utility model discloses be equipped with spring bracket 1 and netted support 2 simultaneously, both alternate arrangements can adjust the concrete length of support according to the focus condition is nimble when guaranteeing the holding power, in addition, the usable spacing hook 3 messenger's support of using in one side has required crooked radian to realize better adherence performance. The utility model discloses avoided when the treatment need customize the support and implant the problem of a plurality of supports according to the focus condition, promoted treatment effeciency, reduced the risk that the patient appears unexpected in the middle of waiting for the process.
The utility model discloses a support material is alloy or polylactic acid fibre of low melting point, can be according to patient's actual conditions and decide, for example actual conditions such as the elasticity of patient's platelet concentration, metal allergen, body fluid composition and concentration, vascular wall, the thickness of vascular wall specifically select. For example, a bracket made of polylactic acid fiber can be selected for a patient allergic to the alloy components, and can be dissolved in blood and discharged out of the body after being implanted; or the patient with poor elasticity of the blood vessel can adopt the bracket made of the alloy material, so that the stent is convenient to be stored in the body for a long time to play a supporting role.
In addition, the melting point of the alloy adopted by the utility model is 40-45 ℃, if the bracket needs to be removed in the future, the bracket only needs to be heated to the melting point to be melted, and then the bracket is taken out by using the suction tool. The alloy comprises one or more of bismuth, indium, tin, gallium and titanium alloy.
The utility model discloses a support coats and has medicine layer 4 and tectorial membrane layer 5 to set up a plurality of medicine release mouths 6 on tectorial membrane layer 5, reach after the support immigration, can slowly release anti-inflammatory, antianaphylaxis, restrain the medicine of rejection, help the patient to adapt to the implantation of support foreign matter, spend the rejection phase. After the condition is eliminated or the drug is released, the stent can be removed or remain in the body as the case may be.
The utility model discloses can be according to patient actual conditions, the size of real-time adjustment support can conveniently remove simultaneously in vitro or clear up to it has the medicine layer to cover, consequently, the utility model has the characteristics of the suitability is strong, implant fast, conveniently remove, diminish inflammation anti-rejection etc.
Drawings
The invention is described in further detail below with reference to the drawings in the specification:
FIG. 1 is a schematic view of the overall structure of the stent of example 1;
FIG. 2 is a schematic view of the entire structure of the stent according to embodiment 2;
FIG. 3 is a schematic view of the entire structure of the stent according to embodiment 3;
FIG. 4 is a schematic view of the entire structure of the stent according to example 4;
FIG. 5 is a schematic view showing the overall structure of the stent according to example 5;
FIG. 6 is a schematic view showing the overall structure of the stent according to example 6;
FIG. 7 is a schematic diagram of an X-shaped mesh support structure;
FIG. 8 is a schematic structural view of a W-shaped mesh support;
FIG. 9 is a comparative view of drug delivery ports of different configurations;
fig. 10 is a schematic cross-sectional view of the bracket according to the present invention;
fig. 11 is a schematic view of the overall structure of the limit hook.
Description of the symbols of the drawings:
1 spring support, 2 netted supports, 3 spacing hooks, 4 medicine layers, 5 tectorial membrane layers, 6 medicine release openings, 201 support rings, 202 buffer connecting pieces.
Detailed Description
Example 1
As shown in fig. 1, the present embodiment specifically provides a peripheral vascular stent, the cross section of which is an annular structure, the stent includes spring stents 1 and mesh stents 2, three cylindrical spring stents 1 and two cylindrical mesh stents 2 are arranged alternately, and two cylindrical mesh stents 2 are respectively provided with two support rings 201 and buffer connectors 202 of different shapes; a strip-shaped limiting hook 3 is arranged on the support, one end of the limiting hook 3 is fixed on the spring support 1, and the other end of the limiting hook 3 is provided with a hook which is a circular ring with a notch and can be hooked on the net-shaped support 2; spring bracket 1 is rich in elasticity, and has good bending property, and spacing hook 3 can hook and fix on netted support 2 wantonly, and then adjusts the length of whole support. During the use, with spacing hook 3 along the axial direction horizontal arrangement of support as far as possible to prevent influencing the blood circulation.
A drug layer 4 and a film coating layer 5 are respectively attached to the outer surface of the spring support 1, the film coating layer 5 is an acrylate polymer film, and a drug release port 6 is arranged on the film coating layer 5.
The net-shaped support 2 is composed of a plurality of wavy support rings 201 which are arranged in the axial direction, the support rings 201 are connected through a buffer connecting piece 202, a medicine layer 4 and a film coating layer 5 are respectively attached to the outer surfaces of the support rings 201 and the connecting piece 202, a medicine release port 6 is arranged on the film coating layer 5, and after the support is moved in, medicines for diminishing inflammation, resisting allergy and suppressing rejection can be slowly released, so that a patient can be helped to adapt to the implantation of a foreign body of the support and the rejection period can be passed. After the condition is eliminated or the drug is released, the stent can be removed or remain in the body as the case may be.
The two ends of the bracket are closed and buckled, so that the problem of scratching blood vessels is prevented.
The support rings 201 of the two net-shaped supports 2 are respectively of an X-shaped structure (figure 7) and a W-shaped structure (figure 8), the central points of the support rings 201 of the X-shaped structures are connected through a buffer connecting piece 202 of a double-ring structure, and the central points of the support rings 201 of the W-shaped structures are connected through a buffer connecting piece 202 of a whole structure in a shape like a Chinese character 'shan'.
One or more of the spring support 1, the mesh support 2 and the limiting hook 3 are made of low-melting-point alloy materials or degradable polylactic acid fibers, and the specific selection can be determined according to the actual conditions of the patient, such as the platelet concentration, the metal allergen, the body fluid components and concentration, the elasticity of the blood vessel wall, the thickness of the blood vessel wall and the like of the patient. For example, a bracket made of polylactic acid fiber can be selected for a patient allergic to the alloy components, and can be dissolved in blood and discharged out of the body after being implanted; or the patient with poor elasticity of the blood vessel can adopt the bracket made of the alloy material, so that the stent is convenient to be stored in the body for a long time to play a supporting role.
In addition, the melting point of the alloy adopted in the embodiment is 45 ℃, if the stent needs to be removed in the future, the stent only needs to be heated to 45 ℃ to reach the melting point to be melted, and then the stent is taken out by using the suction tool.
The size of the bracket can be adjusted in real time according to the actual condition of a patient, the bracket can be conveniently removed from the body or digested, and the bracket is covered with the medicine layer, so that the bracket has the characteristics of strong adaptability, quick implantation, convenient removal, inflammation diminishing, rejection resistance and the like.
In addition, a peripheral blood vessel stent consisting of more spring stents 1, reticular stents 2 and limiting hooks 3 can be prepared according to actual conditions, and the positions of the limiting hooks 3 are not limited to the spring stent 1 on the outermost side so as to adapt to different lesion conditions. The problem that the support need be customized according to the focus condition when the treatment has been avoided to this embodiment, has promoted treatment effeciency, reduces the risk that the patient appears unexpected in the middle of waiting for the process.
Example 2
In the embodiment, only one mesh bracket 2 is arranged between two spring brackets 1, and the mesh bracket 2 is hooked at different positions through one limiting hook 3, so that the specific length and radian of the bracket are finally determined.
Example 3
The difference from embodiment 2 is that the shapes of the support ring 201 and the cushion connection member 202 on the mesh stent 2 are different.
Example 4
The difference from the embodiment 3 is that two limit hooks 3 are adopted to hook different positions on the mesh-shaped bracket 2 respectively so as to determine the length and the radian of the bracket.
Example 5
The difference from embodiment 3 is that two limiting hooks 3 are provided and are axially symmetrically distributed relative to the peripheral vascular stent.
Example 6
The difference from the embodiment 2 is that two sides of the net-shaped bracket 2 are respectively provided with two limiting hooks 3.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Moreover, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Claims (10)
1. The utility model provides a peripheral blood vessel support, its cross section is ring structure, its characterized in that: the support comprises a spring support (1) and a net-shaped support (2), the cylindrical spring support (1) and the cylindrical net-shaped support (2) are arranged alternately, one or more strip-shaped limiting hooks (3) are arranged on the support, one ends of the limiting hooks (3) are fixed on the spring support (1), and hooks are arranged at the other ends of the limiting hooks (3) and can be hooked on the net-shaped support (2) to adjust the length of the whole support;
a drug layer (4) and a film coating layer (5) are respectively attached to the outer surface of the spring support (1), and a drug release port (6) is arranged on the film coating layer (5);
the reticular stent (2) is formed by arranging a plurality of wavy support rings (201) in a direction perpendicular to the axial direction, the support rings (201) are connected through a buffer connecting piece (202), a medicine layer (4) and a film coating layer (5) are respectively attached to the outer surfaces of the support rings (201) and the connecting piece (202), and a medicine release port (6) is arranged on the film coating layer (5);
the two ends of the peripheral blood vessel support are closed buckling structures.
2. A peripheral vascular stent according to claim 1, wherein: the supporting rings (201) of the reticular bracket (2) are in an X-shaped structure and/or a W-shaped structure, and the central points of different supporting rings (201) are connected through a buffer connecting piece (202).
3. A peripheral vascular stent according to claim 2, wherein: the buffer connecting piece (202) is of a double-ring structure, the outer surface of the buffer connecting piece is respectively attached with a medicine layer (4) and a film coating layer (5), and a medicine release port (6) is arranged on the film coating layer (5).
4. A peripheral vascular stent according to claim 2, wherein: the buffer connecting piece (202) is integrally in a structure like a Chinese character 'shan' and is composed of an upside-down U-shaped structure, a medicine layer (4) and a film coating layer (5) are respectively attached to the outer surface of the buffer connecting piece, and a medicine release opening (6) is formed in the film coating layer (5).
5. A peripheral vascular stent according to any of claims 1 to 4, wherein: one or more of the spring support (1), the reticular support (2) and the limiting hook (3) are made of alloy materials with the melting point of 40-45 ℃.
6. A peripheral vascular stent according to any of claims 1 to 4, wherein: one or more of the spring support (1), the reticular support (2) and the limiting hook (3) are made of degradable polylactic acid fiber.
7. A peripheral vascular stent according to claim 1 or 3 or 4, wherein: the coating layer (5) is specifically an acrylate polymer film.
8. A peripheral vascular stent according to claim 1, wherein: two limiting hooks (3) are arranged on each spring support (1) and are axially and symmetrically distributed relative to the peripheral vascular support.
9. A peripheral vascular stent according to claim 1 or 8, wherein: the hook on the limiting hook (3) is a circular ring with a notch.
10. A peripheral vascular stent according to claim 9, wherein: the gap direction of the limiting hook (3) is arranged towards the inside of the net-shaped support (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920528840.3U CN210077946U (en) | 2019-04-18 | 2019-04-18 | Peripheral blood vessel stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920528840.3U CN210077946U (en) | 2019-04-18 | 2019-04-18 | Peripheral blood vessel stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210077946U true CN210077946U (en) | 2020-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920528840.3U Active CN210077946U (en) | 2019-04-18 | 2019-04-18 | Peripheral blood vessel stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210077946U (en) |
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2019
- 2019-04-18 CN CN201920528840.3U patent/CN210077946U/en active Active
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