CN111467099A - Intravascular multilayer bare stent system - Google Patents
Intravascular multilayer bare stent system Download PDFInfo
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- CN111467099A CN111467099A CN202010299429.0A CN202010299429A CN111467099A CN 111467099 A CN111467099 A CN 111467099A CN 202010299429 A CN202010299429 A CN 202010299429A CN 111467099 A CN111467099 A CN 111467099A
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- 238000009941 weaving Methods 0.000 claims description 3
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- 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
- A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
-
- 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
-
- 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
- A61F2002/823—Stents, different from stent-grafts, adapted to cover an aneurysm
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0097—Visible markings, e.g. indicia
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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)
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Abstract
The invention discloses an intravascular multilayer bare stent system, which relates to the technical field of medical equipment and has the technical scheme key points that: the stent main body is formed by a first framework and a second framework, and the first framework and the second framework are cylindrical net structures which are woven by framework wires made of memory alloy or biodegradable high polymer materials and have mutually superposed spiral rotating directions opposite to each other; the upper, middle and lower sections of the first framework and the second framework are provided with rotary connecting rings; the inner wall of the rotary connecting ring is connected with a metal wire; the side wall of the metal wire is connected with a hole sealing strip-shaped film. Can mediate the mesh of the naked support of multilayer and seal, isolate between aneurysm chamber and intermediate layer and the normal blood flow to prevent that normal blood flow from leaking into aneurysm chamber and intermediate layer, make the interior blood flow of tumour chamber and intermediate layer receive the suppression, promote to form blood clot or thrombus in tumour chamber and the intermediate layer so that the aneurysm atrophies, reduce tumour intracavity pressure, reduce the potential danger of aneurysm increase and fracture, reach steadily and possess the treatment purpose of guarantee.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an intravascular multilayer bare stent system.
Background
The main hazards of the method are ① tumor body rupture, the aneurysm wall is continuously impacted by blood flow and gradually expands and thins, and finally the aneurysm body ruptures to cause fatal hemorrhage, ② adnexal wall forms thrombus, the blood flow at the expanded tumor body is slow, and vortex forms, such as the inner surface of the tumor wall is rough, thrombus is easy to form and can cause thrombus to fall off, ③ tumor body presses normal tissues and organs around to cause discomfort or other diseases, such as esophagus pressing to cause dysphagia, trachea pressing to cause dyspnea, larynx pressing recurrent nerve pressing to cause hoarseness, and the like.
The stent is a kind of 'foreign body' permanently left in the body, and can be divided into two categories, namely a bare stent (uncovered stent) and a covered stent (stent-graft), according to whether the surface of the stent is covered by an artificial vascular membrane, wherein the bare stent is a simple metal stent.
The current treatment for aneurysms usually adopts aneurysm isolation, and a covered stent is implanted during the operation. The operating principle of the covered stent is that a mechanical barrier is established between normal blood flow and aneurysm, so that blood cannot enter a tumor cavity. The film-covered stent in the prior art is composed of a round-tube-shaped metal bare stent and an artificial blood vessel which is sewn or bonded inside, the round-tube-shaped metal bare stent is mostly made of elastic metal which is folded into a waveform and is surrounded by a cylindrical surface, and the artificial blood vessel is mostly made of artificial blood vessel film materials. When in use, the covered stent is compressed and loaded in the conveyor, and is delivered to the lesion site through the distal femoral artery or the iliac artery by the conveyor and then released, and the lesion site is isolated from normal blood flow due to the elastic action of the round tubular metal bare stent automatically recovering to the round tubular shape and clinging to the inner wall of the artery, thereby achieving the purpose of treatment. After the covered stent and the bare stent in the prior art are implanted into a blood vessel of a patient, the sizes of mesh pores are not easy to adjust, and the condition of blood leakage easily exists, so that the quality of an aneurysm isolation operation is easily influenced.
Disclosure of Invention
The invention aims to provide an intravascular multilayer bare stent system which can regulate mesh closure of a multilayer bare stent, isolate an aneurysm cavity from normal blood flow and prevent normal blood flow from leaking into the aneurysm cavity, so that blood flow in the aneurysm cavity is inhibited, blood clots or thrombus formed in the aneurysm cavity is promoted to atrophy the aneurysm, the pressure in the aneurysm cavity is reduced, the potential risk of aneurysm enlargement and rupture is reduced, and the purpose of stable and guaranteed treatment is achieved.
The technical purpose of the invention is realized by the following technical scheme: an intravascular multilayer bare stent system comprises a stent main body, wherein the stent main body comprises a first framework and a second framework, the first framework and the second framework are of multi-thread spiral structures formed by weaving framework threads, and the spiral rotating directions of the first framework and the second framework are opposite; the inner walls of the first framework and the second framework are overlapped to form a cylindrical net structure, and the first framework is fixedly connected with the second framework; the first framework and the second framework are formed by connecting an upper section, a middle section and a lower section end to end, and the upper section, the middle section and the lower section of the first framework and the second framework are respectively provided with a rotary connecting ring for the first framework and the second framework to rotate along the radial direction; the inner wall of the rotary connecting ring is fixedly connected with a metal wire parallel to a framework line of the first framework; the side wall of the metal wire is fixedly connected with a hole sealing strip film, and the hole sealing strip film is used for sealing meshes of a net structure formed by overlapping the first framework and the second framework.
By adopting the technical scheme, when the intravascular multi-layer naked stent system is used, the first framework and the second framework which are in a multi-thread spiral structure can be conveniently woven and formed by utilizing the framework lines; the first framework and the second framework are convenient to be mutually overlapped to form a net-shaped structure; when an aneurysm invades and an important branch artery is encountered in the clinical practice process, the blood vessel stent pusher is utilized to push a stent main body of a cylindrical net-shaped structure formed by overlapping the inner walls of a first framework and a second framework to the vascular lesion of a patient, so that the blood flow velocity in a tumor cavity is reduced, the blood flow state in the tumor cavity is changed, the thrombosis in the tumor cavity is induced, the tension of the tumor wall is reduced, and the purpose of isolating the aneurysm is achieved; the connection of the first framework and the second framework is facilitated by rotating the connecting ring; meanwhile, the first framework can rotate along the radial direction of the first framework by rotating the connecting ring; after the stent main body is implanted into a diseased part in a blood vessel of a patient, the rotating connecting ring is controlled to rotate through the pusher, so that the metal wire is driven to rotate along a framework line of the first framework, and the hole sealing strip-shaped film connected with the metal wire is convenient to adjust to seal the meshes of the cylindrical mesh structure formed by overlapping the inner walls of the first framework and the second framework; through hole sealing strip membrane, be convenient for seal the mesh of support main part, reach completely isolated purpose between pathological change department and the normal blood flow to prevent the blood leakage, and guarantee that the molecule is unobstructed.
The invention is further configured to: the framework line is made of memory alloy or biodegradable high polymer material; the distance between the adjacent skeleton lines of the first skeleton and the second skeleton is equal; the length of the hole sealing strip-shaped film is consistent with that of the framework lines, and the width of the hole sealing strip-shaped film is larger than the distance between the adjacent framework lines of the first framework.
By adopting the technical scheme, the length of the hole sealing strip-shaped film is consistent with that of the framework lines, the width of the hole sealing strip-shaped film is larger than the distance between the adjacent framework lines of the first framework, and therefore the hole sealing strip-shaped film can be guaranteed to be capable of completely sealing meshes of the support main body.
The invention is further configured to: the hole sealing strip-shaped film is made of memory alloy or biodegradable high polymer materials, and the thickness of the hole sealing strip-shaped film is 0.01-0.1 mm.
By adopting the technical scheme, the hole sealing strip-shaped film with the thickness of 0.01-0.1mm is used for preventing blood in the blood vessel from leaking into the aneurysm cavity of the aneurysm under the condition of ensuring the smoothness of molecules.
The invention is further configured to: and distinguishable mark points are arranged on the ventral side and the dorsal side of the middle sections of the first framework and the second framework.
By adopting the technical scheme, the position of the bare stent can be observed more clearly under the blood vessel imaging technology through the marking points.
The invention is further configured to: the hole sealing strip-shaped film is an arc-shaped sealing film with a concave surface facing the central axis of the cylindrical net-shaped structure.
By adopting the technical scheme, the hole sealing strip-shaped film is an arc-shaped sealing film with the concave surface facing the central axis of the cylindrical net-shaped structure, so that the smooth flowing of blood in a blood vessel is ensured, and the influence of the hole sealing strip-shaped film on the flowing of the blood in the blood vessel is prevented.
The invention is further configured to: the diameters of the framework lines and the metal wires are 0.05-0.2 mm.
By adopting the technical scheme, the supporting performance of the support body is convenient to guarantee through the framework lines and the metal wires with the diameters of 0.05-0.2 mm.
In conclusion, the invention has the following beneficial effects: the first framework and the second framework of the multi-thread spiral structure are convenient to weave and form through the framework lines; the first framework and the second framework are convenient to be mutually overlapped to form a net-shaped structure; when an aneurysm invades and an important branch artery is encountered in the clinical practice process, the pusher is utilized to push the stent main body of the cylindrical net-shaped structure formed by overlapping the inner walls of the first framework and the second framework to the vascular lesion of a patient, so that the blood flow velocity in a tumor cavity is reduced, the blood flow state in the tumor cavity is changed, the thrombosis in the tumor cavity is induced, the tension of the tumor wall is reduced, and the purpose of isolating the aneurysm is achieved; the metal wire and the framework line of the first framework are connected in a rotating mode through the rotating connecting ring; after the stent main body is implanted into a diseased part in a blood vessel of a patient, the rotating connecting ring is controlled to rotate through the pusher, so that the metal wire is driven to rotate along a framework line of the first framework, and the hole sealing strip-shaped film connected with the metal wire is convenient to adjust to seal the meshes of the cylindrical mesh structure formed by overlapping the inner walls of the first framework and the second framework; the mesh of the stent main body is conveniently sealed by the hole sealing strip-shaped film, so that the purpose of completely isolating a lesion part from normal blood flow is achieved, blood leakage is prevented, and the smoothness of molecules is ensured; meanwhile, in the branch part of the blood vessel, the gap of the early naked stent is large, so that after the branch stent is implanted, the mesh pores of the stent main body are adjusted to seal the meshes of the penetrating part of the non-branch stent.
Drawings
FIG. 1 is a schematic structural diagram in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a first skeleton and a second skeleton in an embodiment of the invention;
FIG. 3 is a schematic view of a connection structure between a metal wire, a hole sealing strip film and a rotary adjusting ring in an embodiment of the present invention.
In the figure: 1. a first skeleton; 2. a second skeleton; 3. a skeleton line; 4. rotating the connecting ring; 5. a metal wire; 6. sealing the hole with a strip-shaped film; 7. and marking points.
Detailed Description
The present invention is described in further detail below with reference to figures 1-3.
Example (b): an intravascular multilayer bare stent system is shown in fig. 1, 2 and 3 and comprises a stent main body, wherein the stent main body comprises a first framework 1 and a second framework 2, the first framework 1 and the second framework 2 are of multi-thread spiral structures formed by weaving framework wires 3, and the spiral rotating directions of the first framework 1 and the second framework 2 are opposite. The inner walls of the first framework 1 and the second framework 2 are overlapped to form a cylindrical net structure, and the first framework 1 is fixedly connected with the second framework 2. The first framework 1 and the second framework 2 are formed by connecting an upper section, a middle section and a lower section end to end, and the upper section, the middle section and the lower section of the first framework 1 and the second framework 2 are respectively connected with a rotary connecting ring 4 for the first framework 1 and the second framework 2 to rotate along the radial direction. The inner wall of the rotary connecting ring 4 is fixedly connected with a metal wire 5 which is parallel to the framework line 3 of the first framework 1. The side wall of the metal wire 5 is fixedly connected with a hole sealing strip-shaped film 6, and the hole sealing strip-shaped film 6 is used for sealing the mesh of the net-shaped structure formed by overlapping the first framework 1 and the second framework 2.
In this embodiment, according to the morphology and hemodynamic characteristics of the aneurysm, the bare stents with different specifications and different parameters such as mesh porosity, mesh density and mesh size can be processed by changing the parameters such as the spiral diameter, the thread pitch, the wire diameter length and the spiral angle of the first and second scaffolds 1 and 2. The framework lines 3, the metal wires 5 and the hole sealing strip-shaped film 6 are made of medical memory alloy or biodegradable high polymer materials. The rotary connecting ring 4 is a ball bearing structure with balls mounted inside, the first framework 1 is connected with the inside of the rotary connecting ring 4, and the second framework 2 is connected with the outer wall of the rotary connecting ring 4. When the intravascular multi-layer naked stent system is used, the first framework 1 and the second framework 2 which are in a multi-thread spiral structure are convenient to weave and form by utilizing the framework wires 3. The first framework 1 and the second framework 2 are convenient to be mutually overlapped to form a net-shaped structure. When the case that the aneurysm invades and an important branch artery is encountered in the clinical practice process, the blood vessel stent pusher is utilized to push the stent main body of the cylindrical net-shaped structure formed by overlapping the inner walls of the first framework 1 and the second framework 2 to the vascular lesion of a patient, so that the blood flow velocity in the aneurysm cavity is conveniently reduced, the blood flow state in the aneurysm cavity is changed, the thrombosis in the aneurysm cavity is induced, the tension of the aneurysm wall is reduced, and the purpose of isolating the aneurysm is achieved. By rotating the connection ring 4, the connection of the first frame 1 and the second frame 2 is facilitated. Meanwhile, by rotating the connection ring 4, the first frame 1 can be rotated in the radial direction thereof. After the main support body is implanted into a diseased part in a blood vessel of a patient, the rotating connecting ring 4 is controlled by the pusher to rotate, so that the metal wire 5 is driven to rotate along the framework line 3 of the first framework 1, and the hole sealing strip-shaped film 6 connected with the metal wire 5 is convenient to adjust to seal the meshes of the cylindrical mesh structure formed by overlapping the inner walls of the first framework 1 and the second framework 2. Through hole sealing strip membrane 6, be convenient for seal the mesh of support main part, reach completely isolated purpose between pathological change department and the normal blood flow to prevent the blood leakage, and guarantee that the molecule is unobstructed.
The skeleton line 3 is made of memory alloy or biodegradable polymer. The intervals between the adjacent skeleton lines 3 of the first skeleton 1 and the second skeleton 2 are equal. The length of the hole sealing strip-shaped film 6 is consistent with that of the framework lines 3, and the width of the hole sealing strip-shaped film 6 is larger than the distance between the adjacent framework lines 3 of the first framework 1.
In this embodiment, the length of the hole sealing strip-shaped film 6 is the same as the length of the framework lines 3, and the width of the hole sealing strip-shaped film 6 is larger than the distance between the adjacent framework lines 3 of the first framework 1, so as to ensure that the hole sealing strip-shaped film 6 can completely seal the meshes of the stent main body.
The hole sealing strip-shaped film 6 is made of memory alloy or biodegradable high polymer materials, and the thickness of the hole sealing strip-shaped film 6 is 0.01-0.1 mm.
In the embodiment, the hole sealing strip-shaped film 6 with the thickness of 0.01-0.1mm is used for preventing blood in the blood vessel from leaking into the aneurysm cavity of the aneurysm under the condition of ensuring the smoothness of molecules.
In the embodiment, the marking points 7 facilitate the position of the bare stent to be observed more clearly under the blood vessel imaging technology, thereby facilitating the positioning of the bare stent.
The hole sealing strip-shaped film 6 is an arc-shaped sealing film with a concave surface facing the central axis of the cylindrical net-shaped structure.
In this embodiment, the hole sealing strip-shaped film 6 is an arc-shaped closed film with a concave surface facing the central axis of the cylindrical net structure, so that smooth blood flow in the blood vessel is ensured, and the influence of the hole sealing strip-shaped film 6 on the blood flow in the blood vessel is prevented.
The diameters of the framework lines 3 and the metal wires 5 are 0.05-0.2 mm.
In the embodiment, the supporting performance of the bracket body is convenient to ensure through the framework line 3 and the metal wire 5 with the diameter of 0.05-0.2 mm.
The working principle is as follows: when the intravascular multi-layer naked stent system is used, the first framework 1 and the second framework 2 which are in a multi-thread spiral structure can be conveniently woven and formed by utilizing the framework lines 3 made of memory alloy or biodegradable high polymer materials. The first framework 1 and the second framework 2 are conveniently overlapped to form a net structure. When the case that the aneurysm invades and an important branch artery is encountered in the clinical practice process, the pusher is utilized to push the stent main body of the cylindrical net-shaped structure formed by overlapping the inner walls of the first framework 1 and the second framework 2 to the vascular lesion of a patient, so that the blood flow velocity in the aneurysm cavity is reduced, the blood flow state in the aneurysm cavity is changed, the thrombosis in the aneurysm cavity is induced, the tension of the aneurysm wall is reduced, and the purpose of isolating the aneurysm is achieved. By rotating the connecting ring 4, the rotational connection between the wire 5 and the skeleton line 3 of the first skeleton 1 is facilitated. After the main support body is implanted into a diseased part in a blood vessel of a patient, the rotating connecting ring 4 is controlled by the pusher to rotate, so that the metal wire 5 is driven to rotate along the framework line 3 of the first framework 1, and the hole sealing strip-shaped film 6 connected with the metal wire 5 is convenient to adjust to seal the meshes of the cylindrical mesh structure formed by overlapping the inner walls of the first framework 1 and the second framework 2. Through hole sealing strip membrane 6, be convenient for seal the mesh of support main part, reach completely isolated purpose between pathological change department and the normal blood flow to prevent the blood leakage, and guarantee that the molecule is unobstructed. Through with this naked endovascular multilayer bare stent implantation such as when the aneurysm chamber, can mediate the mesh of the naked support of multilayer and seal or become dense mesh by dredging the mesh, it is isolated between aneurysm chamber and the normal blood flow, and can prevent that normal blood flow from leaking into the aneurysm chamber, thereby make the intracavity of tumor blood flow receive the suppression, promote the intracavity of tumor to form blood clot or thrombus so that the aneurysm atrophy, reduce the intracavity of tumor pressure, reduce the aneurysm increase and the ruptured potential danger, reach stably and possess the treatment purpose of guarantee. Meanwhile, in the branch part of the blood vessel, the gap of the early naked stent is large, so that after the branch stent is implanted, the mesh pores of the stent main body are adjusted to seal the meshes of the penetrating part of the non-branch stent.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a naked stent system of endovascular multilayer, includes the stent main part, characterized by: the stent main body comprises a first framework (1) and a second framework (2), the first framework (1) and the second framework (2) are of multi-thread spiral structures formed by weaving framework wires (3), and the spiral rotating directions of the first framework (1) and the second framework (2) are opposite; the inner walls of the first framework (1) and the second framework (2) are overlapped to form a cylindrical net structure, and the first framework (1) is fixedly connected with the second framework (2); the first framework (1) and the second framework (2) are formed by connecting an upper section, a middle section and a lower section end to end, and the upper section, the middle section and the lower section of the first framework (1) and the second framework (2) are respectively provided with a rotary connecting ring (4) for the first framework (1) and the second framework (2) to rotate along the radial direction; the inner wall of the rotary connecting ring (4) is fixedly connected with a metal wire (5) which is parallel to the framework line (3) of the first framework (1); the side wall of the metal wire (5) is fixedly connected with a hole sealing strip-shaped film (6), and the hole sealing strip-shaped film (6) is used for sealing meshes of a net-shaped structure formed by overlapping the first framework (1) and the second framework (2).
2. The endovascular multilayer bare stent system according to claim 1, wherein: the framework line (3) is made of memory alloy or biodegradable high polymer material; the distance between the adjacent skeleton lines (3) of the first skeleton (1) and the second skeleton (2) is equal; the length of the hole sealing strip-shaped film (6) is consistent with that of the framework lines (3), and the width of the hole sealing strip-shaped film (6) is larger than the distance between the adjacent framework lines (3) of the first framework (1).
3. The endovascular multilayer bare stent system according to claim 1, wherein: the hole sealing strip-shaped film (6) is made of memory alloy or biodegradable high polymer materials, and the thickness of the hole sealing strip-shaped film (6) is 0.01-0.1 mm.
4. The endovascular multilayer bare stent system according to claim 1, wherein: the ventral side and the dorsal side of the middle sections of the first framework (1) and the second framework (2) are provided with distinguishable mark points (7).
5. The endovascular multilayer bare stent system according to claim 1, wherein: the hole sealing strip-shaped film (6) is an arc-shaped sealing film with a concave surface facing the central axis of the cylindrical net-shaped structure.
6. The endovascular multilayer bare stent system according to claim 1, wherein: the diameters of the framework lines (3) and the metal wires (5) are 0.05-0.2 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010299429.0A CN111467099A (en) | 2020-04-16 | 2020-04-16 | Intravascular multilayer bare stent system |
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| CN202010299429.0A CN111467099A (en) | 2020-04-16 | 2020-04-16 | Intravascular multilayer bare stent system |
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| CN111467099A true CN111467099A (en) | 2020-07-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113599035A (en) * | 2021-09-02 | 2021-11-05 | 东莞颠覆产品设计有限公司 | Support and application |
| CN114767179A (en) * | 2022-04-09 | 2022-07-22 | 四川大学华西医院 | Atrial septal defect plugging device |
| CN114767179B (en) * | 2022-04-09 | 2023-05-12 | 四川大学华西医院 | Atrial septal defect plugging device |
| CN115153953A (en) * | 2022-09-08 | 2022-10-11 | 深圳市华和创微医疗科技有限公司 | Three-dimensional braided stent and manufacturing method |
| CN115153953B (en) * | 2022-09-08 | 2023-01-03 | 深圳市华和创微医疗科技有限公司 | Three-dimensional braided stent and manufacturing method |
| CN115844605A (en) * | 2023-02-17 | 2023-03-28 | 太原理工大学 | Artery blood vessel support |
| CN115844605B (en) * | 2023-02-17 | 2023-05-16 | 太原理工大学 | Arterial vessel stent |
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