CN111035426A - Abdominal aortic aneurysm tectorial membrane support - Google Patents
Abdominal aortic aneurysm tectorial membrane support Download PDFInfo
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- CN111035426A CN111035426A CN201911402794.3A CN201911402794A CN111035426A CN 111035426 A CN111035426 A CN 111035426A CN 201911402794 A CN201911402794 A CN 201911402794A CN 111035426 A CN111035426 A CN 111035426A
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- aortic aneurysm
- abdominal aortic
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- 208000002223 abdominal aortic aneurysm Diseases 0.000 title claims abstract description 27
- 208000007474 aortic aneurysm Diseases 0.000 title claims abstract description 26
- 210000002489 tectorial membrane Anatomy 0.000 title claims abstract description 5
- 238000005192 partition Methods 0.000 claims abstract description 16
- 210000000702 aorta abdominal Anatomy 0.000 claims description 17
- 210000002254 renal artery Anatomy 0.000 claims description 16
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 239000008280 blood Substances 0.000 description 6
- 210000004369 blood Anatomy 0.000 description 6
- 210000004204 blood vessel Anatomy 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000017531 blood circulation Effects 0.000 description 4
- 210000001105 femoral artery Anatomy 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 210000000709 aorta Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010038366 Renal aneurysm Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000560 biocompatible material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000002594 fluoroscopy Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 208000019553 vascular disease Diseases 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
- A61B17/12118—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm for positioning in conjunction with a stent
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/12031—Type of occlusion complete occlusion
-
- 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
- A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
-
- 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
- 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
- A61F2/848—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents having means for fixation to the vessel wall, e.g. barbs
- A61F2002/8483—Barbs
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Reproductive Health (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Neurosurgery (AREA)
- Prostheses (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention discloses an abdominal aortic aneurysm tectorial membrane support which comprises a main road support and a secondary road support, wherein the main road support and the secondary road support are respectively arranged, the main road support comprises a first cylindrical part and a second cylindrical part, the first cylindrical part and the second cylindrical part are integrally formed, a partition part is arranged in the first cylindrical part, the partition part divides the first cylindrical part into two semi-cylindrical cavities, the second cylindrical part and the lower edge of one of the semi-cylindrical cavities are integrally formed, the secondary road support comprises a cylindrical pipe part and a semi-cylindrical pipe part attached to the semi-cylindrical cavities, the semi-cylindrical pipe part and the cylindrical pipe part are integrally formed, hooks are arranged on the edges of the semi-cylindrical pipe parts, the hooks are arranged on one side close to the partition part, a first fixed framework is arranged on the upper edge of the first cylindrical part, and 2 first fixed frameworks are arranged. The covered stent can effectively solve the problems that the existing covered stent is easy to move and fall off and the existing secondary stent is not easy to install.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to an abdominal aortic aneurysm covered stent.
Background
Abdominal aortic aneurysms are a common vascular disease in clinical practice, and if not treated in time, can cause life risks due to the instant rupture of the aortic aneurysm. The currently clinically common treatment method is an interventional therapy method, and the principle of the method is that a covered stent is pre-installed in a sending device, is intervened in a diseased part of abdominal aorta through femoral artery, is accurately released in the diseased part under the monitoring of an X-ray fluoroscopy device, and can effectively reduce the pressure in the aorta wall of the diseased part after being implanted, so that the rupture of blood vessels near the abdominal aortic aneurysm is avoided.
Currently, in the industry, stent grafts for the treatment of abdominal aortic aneurysms are typically made from nitinol materials, but are also made from stainless steel and other biocompatible materials. From the structural point of view, there are two main types, namely, a straight-tube type and a Y type, wherein, the Y type covered stent is applied more, and when the Y type covered stent is placed, incisions are needed to be made on the left femoral artery and the right femoral artery simultaneously, and the covered stent is led in steps, so the requirements are stricter.
For interventional treatment of abdominal aortic aneurysms, there are two technical difficulties, one is that the implanted stent graft may move and fall out after being installed from the desired position (initial position) during the later life of the patient; secondly, the leg-wearing process is complex, and the secondary stent is not easy to be penetrated into the opening of the Y-shaped covered stent, so that the operation time is prolonged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the covered stent for the abdominal aortic aneurysm, which can effectively solve the problems that the existing covered stent is easy to move and fall off and the existing secondary stent is not easy to install.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an abdominal aortic aneurysm tectorial membrane support, main road support and secondary road support including setting up respectively, main road support includes first cylindric portion and second cylindric portion, first cylindric portion and second cylindric portion integrated into one piece, be provided with the partition portion in the first cylindric portion, the partition portion is equallyd divide into two semicylindrical cavitys with first cylindric portion, the lower part edge integrated into one piece of second cylindric portion and one of them semicylindrical cavity, secondary road support includes the semicylindrical pipe portion of pipe portion and laminating mutually with the semicylindrical cavity, semicylindrical pipe portion and pipe portion integrated into one piece, semicylindrical pipe portion edge is provided with the couple, the couple sets up in being close to partition portion one side, the top edge of first cylindric portion is provided with first fixed skeleton, first fixed skeleton is.
The beneficial effects produced by adopting the scheme are as follows: the first cylindrical part is placed in an abdominal aorta between a renal artery and an abdominal aortic aneurysm through conveying equipment and then slowly released to enable the first cylindrical part to be completely attached to the abdominal aorta, the position of the first cylindrical part is adjusted through releasing equipment, so that the height of a first fixed framework at the upper part of the first cylindrical part is matched with the height of the renal artery, the first fixed frameworks are respectively released into the left and right renal arteries, and a main road bracket is hung in the left and right renal arteries through the first fixed frameworks, so that the main road bracket is prevented from falling off or moving downwards; insert the second branch road support in the other half cylinder type cavity of first cylindric section through release equipment again, then release, the half cylinder type pipe portion of the second branch road support just laminates with the half cylinder type cavity in the first cylindric section after the release, hang the second branch road support on the partition portion through the couple that sets up on it, avoid the second branch road support to drop from the half cylinder type cavity, at this moment, blood in the abdominal aorta just is cut apart into two strands through being cut apart into after the first cylindric section gets into, two strands of blood flow out through second cylindric section and pipe portion respectively, through this kind of mode, alright with blood and abdominal aortic aneurysm isolated, realize the purpose of treatment. Because the first cylindrical part is arranged in the intact abdominal aorta at the upper part of the abdominal aortic aneurysm, when the secondary stent is installed, the guide wire only has an upward path after entering the abdominal aortic aneurysm, the design is convenient for the installation of the secondary stent, and the installation time can be greatly shortened.
Further, the shape of the semi-cylindrical tube portion is the same as the semi-cylindrical cavity.
The beneficial effects produced by adopting the scheme are as follows: this design can improve the laminating degree of semicylinder pipe portion and semicylinder cavity greatly for blood flows through semicylinder pipe portion completely, avoids appearing the condition emergence in a small amount of blood seepage advances abdominal aortic aneurysm.
Furthermore, the main road support and the secondary road support are both made of a memory alloy framework and a film covering material, and the memory alloy framework is sewn outside or inside the film covering material.
The beneficial effects produced by adopting the scheme are as follows: the main road support and the secondary road support are manufactured through a 3D printing technology, the size of the manufactured main road support and the size of the manufactured secondary road support are consistent with the diameter of a blood vessel of a patient, after the main road support and the secondary road support are installed and released, the main road support can be perfectly attached to the abdominal aorta of the patient, the secondary road support can be perfectly attached to the main road support, blood exposure is avoided, and the treatment effect is improved.
Furthermore, the edge of the upper part of the main road support is provided with a second fixing framework in an inverted V shape, the second fixing framework is arranged on one side of the second cylindrical part, and barbs are arranged on the outer side of the second fixing framework.
The beneficial effects produced by adopting the scheme are as follows: the both ends and the memory alloy leg joint of second mount, after the exact position release of main road support in abdominal aorta, release the fixed skeleton of second, the blood vessel inner wall is just pricked to the barb that sets up on it, realize the fixed action to the main road support, avoid the main road support to drop or move down, through the fixed skeleton combined action of first fixed skeleton and second, improve the fixed effect of main road support, the two combined action, the power that bears when also can reducing single device is fixed, under the prerequisite that improves fixed effect, reduce the injury to the blood vessel.
Further, the upper edge of the semi-cylindrical pipe part is also provided with an inverted V-shaped second fixing framework, the second fixing framework is arranged on the arc edge of the semi-cylindrical pipe part, and barbs are arranged on the second fixing framework.
The beneficial effects produced by adopting the scheme are as follows: the secondary road support is fixed through the second fixing framework, and the fixing effect of the secondary road support is improved through the combined action of the second fixing framework and the hook.
Further, the memory alloy framework is arranged in a corrugated shape.
The beneficial effects produced by adopting the scheme are as follows: when a patient bends over to move, the corrugated memory alloy framework has certain plasticity, and the condition of unsmooth blood circulation can not occur.
Further, the first anchor frame is disposed within the renal artery, and an angle between the first anchor frame and the first cylindrical portion coincides with an angle between the renal artery and the abdominal aorta.
The beneficial effects produced by adopting the scheme are as follows: after the first fixed skeleton printed by the 3D printing technology is released, the angle between the first fixed skeleton and the first cylinder can be completely consistent with the angle between the renal artery and the abdominal aorta, so that the first fixed skeleton is attached to the lower inner wall of the renal artery, and the fixing effect of the main road support is improved.
Furthermore, two positioning points are arranged on the first cylindrical part, and the positioning points are respectively arranged on the upper edge of the first cylindrical part at two sides of the partition part.
The beneficial effects produced by adopting the scheme are as follows: the position of the main road support release is determined through the positioning points, and the accuracy of the release position is improved.
Furthermore, the side wall of the semi-cylindrical pipe part is also provided with positioning points.
The beneficial effects produced by adopting the scheme are as follows: the accuracy of the release position of the secondary road bracket is ensured through the positioning point.
The beneficial effects produced by the invention are as follows:
the main road bracket comprises a first cylindrical part and a second cylindrical part, wherein a partition part is arranged in the first cylindrical part and divides the first cylindrical part into two semi-cylindrical cavities, and when the main road bracket is installed, the first cylindrical part is placed into the intact abdominal aorta at the upper part of an abdominal aortic aneurysm, at the moment, the secondary road bracket only has one passage when being inserted, so that the secondary road bracket can be quickly and accurately inserted into the rest semi-cylindrical cavities, and the operation time is greatly shortened.
The first cylindrical part is provided with a first fixed framework, the position of the first fixed framework is the same as that of the renal artery, the first cylindrical part is used for fixing the main road support, the upper edges of the first cylindrical part and the semi-cylindrical pipe part are also provided with a second fixed framework, and the fixing effect of the main road support and the secondary road support is improved through the mutual cooperation effect of the first fixed framework and the second fixed framework.
Drawings
FIG. 1 is a schematic structural diagram of a main road cradle according to the present invention;
FIG. 2 is a schematic view of the stent graft of the present invention after installation in the abdominal aorta;
FIG. 3 is a schematic structural diagram of an aorta abdominalis covered stent;
FIG. 4 is a schematic top view of the first cylindrical portion;
FIG. 5 is a schematic structural view of a secondary support;
reference numerals: 1. a first cylindrical portion; 2. a second cylindrical portion; 3. a partition portion; 4. a semi-cylindrical cavity; 5. a round tube portion; 6. a semi-cylindrical tube portion; 7. hooking; 8. a first fixed skeleton; 9. a memory alloy skeleton; 10. a second fixed framework; 11. a barb; 12. and positioning points.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In one embodiment of the present invention, as shown in fig. 1 to 5, there is provided an abdominal aortic aneurysm covered stent, including a main stent and a secondary stent which are respectively arranged, and optimally, both the main stent and the secondary stent include a memory alloy framework 9 and a covered material, and the memory alloy framework 9 is sewn outside or inside the covered material. Preferably, the memory alloy skeleton 9 is arranged in a corrugated shape.
The main road support comprises a first cylindrical part 1 and a second cylindrical part 2, the first cylindrical part 1 and the second cylindrical part 2 are integrally formed, optimally, an inverted V-shaped second fixed framework 10 is arranged on the edge of the upper portion of the main road support, the second fixed framework 10 is arranged on one side of the second cylindrical part 2, and barbs 11 are arranged on the outer side of the second fixed framework 10.
The first cylindrical part 1 is internally provided with a separating part 3, the separating part 3 equally divides the first cylindrical part 1 into two semi-cylindrical cavities 4, optimally, the first cylindrical part 1 is provided with two positioning points 12, and the positioning points 12 are respectively arranged on the upper edge of the first cylindrical part 1 at two sides of the separating part 3.
The second cylindrical part 2 is integrally formed with the lower edge of one of the semi-cylindrical cavities 4, the secondary road support comprises a cylindrical pipe part 5 and a semi-cylindrical pipe part 6 attached to the semi-cylindrical cavity 4, the semi-cylindrical pipe part 6 is integrally formed with the cylindrical pipe part 5, and optimally, the shape of the semi-cylindrical pipe part 6 is the same as that of the semi-cylindrical cavity 4. Optimally, the upper edge of the semi-cylindrical pipe part 6 is also provided with an inverted V-shaped second fixing framework 10, the second fixing framework 10 is arranged on the arc-shaped edge of the semi-cylindrical pipe part 6, and the second fixing framework 10 is provided with barbs 11.
The edge of the semi-cylindrical pipe part 6 is provided with a hook 7, the hook 7 is arranged on one side close to the partition part 3, the upper edge of the first cylindrical part 1 is provided with a first fixed framework 8, the number of the first fixed frameworks 8 is 2, and the first fixed framework 8 and a memory alloy framework 9 closest to the first fixed framework are integrally formed. Preferably, the first anchoring framework 8 is arranged in the renal artery, the angle between the first anchoring framework 8 and the first cylindrical section 1 corresponding to the angle between the renal artery and the abdominal aorta. Optimally, the side walls of the semi-cylindrical tube portion 6 are also provided with positioning points 12.
The use process of the structure is as follows: place the first cylindric portion 1 of main road support in the intact abdominal aorta between renal artery and abdominal aortic aneurysm through conveying equipment, then slowly release, make first cylindric portion 1 laminate completely with abdominal aorta, position adjustment first cylindric portion 1's position through release equipment through setpoint 12, make first fixed skeleton 8 on first cylindric portion 1 upper portion release respectively into in the left and right renal artery, through first fixed skeleton 8 with main road support "hang" in the left and right renal artery, and then avoid main road support to drop or move down, releasing second fixed skeleton 10, make barb 11 on the second fixed skeleton 10 pierce the blood vessel inner wall, further improve the fixed action to main road support. Insert the inferior way support again through release equipment in half cylindrical cavity 4 of first cylindric section 1, find the release position through setpoint 12, then release, the half cylindrical cavity 4 laminating in half cylindrical cavity 6 of the inferior way support just with first cylindric section 1 after the release, hang the inferior way support on partition portion 3 through the couple that sets up on it, avoid the inferior way support to drop from half cylindrical cavity 4, release the second fixed skeleton 10 on inferior way support upper portion again, make barb 11 prick the blood vessel inner wall, further improve the fixed effect of inferior way support, at this moment, blood in the abdominal aorta gets into and is cut apart into two strands behind the first cylindric section 1, two strands of blood flow out through second cylindric section 2 and round tube portion 5 respectively, through this kind of mode, alright with blood isolated with abdominal aortic aneurysm, realize the purpose of treatment. Because the first cylindrical part 1 is arranged in the intact abdominal aorta at the upper part of the abdominal aortic aneurysm, when the secondary stent is installed, the guide wire only has an upward path after entering the abdominal aortic aneurysm, the design is convenient for the installation of the secondary stent, and the installation time can be greatly shortened.
Claims (9)
1. The abdominal aortic aneurysm tectorial membrane stent is characterized by comprising a main road stent and a secondary road stent which are respectively arranged, wherein the main road stent comprises a first cylindrical part (1) and a second cylindrical part (2), the first cylindrical part (1) and the second cylindrical part (2) are integrally formed, a partition part (3) is arranged in the first cylindrical part (1), the first cylindrical part (1) is uniformly divided into two semi-cylindrical cavities (4) by the partition part (3), the second cylindrical part (2) and one of the semi-cylindrical cavities (4) are integrally formed, the secondary road stent comprises a cylindrical pipe part (5) and a semi-cylindrical pipe part (6) which is attached to the semi-cylindrical cavities (4), the semi-cylindrical pipe part (6) and the cylindrical pipe part (5) are integrally formed, and hooks (7) are arranged at the edge of the semi-cylindrical pipe part (6), the hook (7) is arranged on one side close to the partition part (3), a first fixed framework (8) is arranged on the upper edge of the first cylindrical part (1), and 2 first fixed frameworks (8) are arranged.
2. The covered stent for abdominal aortic aneurysm as claimed in claim 1, wherein the semi-cylindrical tube portion (6) has the same shape as the semi-cylindrical cavity (4).
3. The covered stent for abdominal aortic aneurysm as claimed in claim 1, wherein the primary stent and the secondary stent are both made of memory alloy skeleton (9) and covered material, and the memory alloy skeleton (9) is sewed outside or inside the covered material.
4. The covered stent for abdominal aortic aneurysm as claimed in claim 3, wherein the memory alloy skeleton (9) is configured in a corrugated shape.
5. The covered stent for abdominal aortic aneurysm as claimed in claim 1, wherein the upper edge of the main stent is provided with a second fixing skeleton (10) having an inverted V shape, the second fixing skeleton (10) is provided at the side of the second cylindrical part (2), and barbs (11) are provided at the outside of the second fixing skeleton (10).
6. The covered stent for abdominal aortic aneurysm as claimed in claim 4, wherein the second fixing frame (10) of the inverted V shape is disposed on the upper edge of the semi-cylindrical tube part (6), the second fixing frame (10) is disposed on the arc-shaped edge of the semi-cylindrical tube part (6), and the barbs (11) are disposed on the second fixing frame (10).
7. The stent-graft according to claim 1, wherein the first anchoring framework (8) is disposed in the renal artery, and the angle between the first anchoring framework (8) and the first cylindrical section (1) is identical to the angle between the renal artery and the abdominal aorta.
8. The stent-graft according to claim 1, wherein two positioning points (12) are provided on the first cylindrical portion (1), and the positioning points (12) are respectively provided on the upper edge of the first cylindrical portion (1) on both sides of the partition portion (3).
9. The stent covered with aortic aneurysm as claimed in claim 8, wherein the positioning points (12) are provided on the side wall of the semi-cylindrical tube portion (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911402794.3A CN111035426A (en) | 2019-12-31 | 2019-12-31 | Abdominal aortic aneurysm tectorial membrane support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911402794.3A CN111035426A (en) | 2019-12-31 | 2019-12-31 | Abdominal aortic aneurysm tectorial membrane support |
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