CN211300518U - Naked district degradable thoracic aorta covered stent - Google Patents
Naked district degradable thoracic aorta covered stent Download PDFInfo
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- CN211300518U CN211300518U CN201921684395.6U CN201921684395U CN211300518U CN 211300518 U CN211300518 U CN 211300518U CN 201921684395 U CN201921684395 U CN 201921684395U CN 211300518 U CN211300518 U CN 211300518U
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- thoracic aorta
- stent
- degradable
- naked
- support
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Abstract
The utility model discloses a naked area degradable thoracic aorta tectorial membrane support, including fixed bolster and a plurality of thoracic aorta support units that are wave and coil into a ring, the fixed bolster is the wave, the fixed bolster coils into the ring, a plurality of thoracic aorta support all wraps the polyester film, the fixed bolster divide into naked district portion and connecting portion along its radial, connecting portion locate the one end of polyester film, connecting portion also wraps the polyester film; the naked area part of the fixed support is made of degradable magnesium alloy or iron alloy material, and the connecting part and the thoracic aorta support are made of medical stainless steel material or nickel-titanium alloy material. The utility model discloses a tectorial membrane support is when the thoracic aorta is used, and its naked district is degradable.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a naked district degradable thoracic aorta covered stent.
Background
The traditional aorta covered stent generally protrudes a bare area (a metal grid stent without a polyester film) made of metal alloy at the end part of the stent, or barbs are arranged on the outer side wall of the stent, so that the stent can be stably placed in an artery in the early stage of an operation, however, in the two fixing modes, the bare area and the barbs can be always remained in the artery, and a certain degree of damage can be caused to the artery of a patient over time, the rupture of the intima and media of the aorta is caused, and a new aortic dissection appears. At present, degradable bare stents are available in treatment of arteriolar stenotic lesions such as coronary artery and the like, but aortic stents are basically covered stents which mainly play a role in isolating aortic aneurysm or aortic dissection in a cavity, so that the stent with a membrane part has a permanent supporting function and is not suitable for degradable materials. And the naked area part only plays a role in fixing the stent in the early stage of stent placement, and prevents the stent from backward displacement under the impact of blood flow. After 1-3 months of operation, vascular endothelial cells begin to grow slowly into the stent, wrap the front ends of the bare area and the covered stent, the stent can not shift any more, the bare area of the stent also loses effect, but the risk of vascular rupture is caused due to continuous stimulation of the bare area to the vascular wall, and the long-term effect is influenced.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model provides a naked district degradable thoracic aorta covered stent, this covered stent uses when thoracic aorta, and its naked district degradable.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a naked area degradable thoracic aorta covered stent comprises a fixed stent and a plurality of wavy thoracic aorta stent units, wherein each thoracic aorta stent unit is wound into a ring shape, and the plurality of circular thoracic aorta stent units are sequentially arranged to form a tubular thoracic aorta stent; the fixing support is in a wave shape and wound into a ring shape, a plurality of thoracic aorta supports are coated with polyester films, the thoracic aorta supports and the polyester films are integrally in a tubular shape, the fixing support is divided into an upper part and a lower part along the radial direction of the fixing support, the upper part and the lower part are respectively a naked area part and a connecting part, the connecting part is arranged at one end of the polyester films, the naked area part protrudes out of one end of the polyester films, and the connecting part is also coated with the polyester films; the naked area part of the fixed support is made of degradable magnesium alloy or iron alloy material, and the connecting part and the thoracic aorta support are made of medical stainless steel material or nickel-titanium alloy material.
In the structure, the thoracic aorta covered stent consists of a thoracic aorta stent and a fixed stent, a plurality of independent thoracic aorta stent units in the thoracic aorta stent are fixedly coated with connecting parts of the fixed stent through polyester films to form a tubular thoracic aorta covered stent, a naked area part of the fixed stent is exposed and used for fixing the thoracic aorta covered stent, moreover, the fixed stent is made of degradable magnesium alloy or iron alloy material, after the thoracic aorta covered stent is placed in a human body for a period of time, the main part of thoracic aorta tectorial membrane support fuses with thoracic aorta (need not additional structure at this moment and fix), and the naked district portion that plays the fixed action is absorbed by the human body gradually, takes place to degrade, compares traditional naked district nondegradable and adopts the structure of barb, has avoided thoracic aorta tectorial membrane support to arrange the fish tail of the artery wall that the human body caused in for a long time.
Preferably, a plurality of Z-shaped frames are arranged between adjacent thoracic aorta stent units, and two ends of each Z-shaped frame are respectively connected to nodes of the wave-shaped structures of the adjacent thoracic aorta stent units.
Through setting up Z shape frame can make and link into a whole between a plurality of thoracic aorta support units, and the structure of Z shape frame possesses certain flexible ability equally, can carry out certain automatically regulated along with thoracic aorta support's flexible, and the effect of support and crooked effect are better.
Preferably, the interval between two adjacent Z-shaped frames in the circumferential direction of the polyester film is 1.5 cycles, and the adjacent Z-shaped frames are staggered in the axial direction of the polyester film.
Interval 1.5 periods and vertical crisscross setting between the Z shape frame for holistic supporting effect is better, can reduce the use of raw materials simultaneously, reduce cost.
Preferably, the fixed support is formed by winding a magnesium alloy wire or an iron alloy wire, and the stimulation effect of the bare area on the artery wall can disappear slowly along with the degradation of the bare area.
Has the advantages that:
1. the thoracic aorta covered stent consists of a thoracic aorta stent and a fixed stent, a plurality of independent thoracic aorta stent units in the thoracic aorta stent are fixedly covered with connecting parts of the fixed stent through polyester films to form a tubular thoracic aorta covered stent, the bare area part of the fixed stent is exposed and used for fixing the thoracic aorta covered stent, moreover, the naked area of the fixed stent is made of degradable magnesium alloy or iron alloy material, after the thoracic aorta covered stent is placed in a human body for a period of time, the main part of thoracic aorta tectorial membrane support fuses with thoracic aorta (need not additional structure at this moment and fix), and the naked district portion that plays the fixed action is absorbed by the human body, takes place to degrade, compares traditional naked district nondegradable and adopts the structure of barb, has avoided thoracic aorta tectorial membrane support to place the fish tail of the artery wall that the human body caused in for a long time.
2. The Z-shaped frame can enable the plurality of thoracic aorta stent units to be connected into a whole, and the structure of the Z-shaped frame also has certain telescopic capacity, so that certain automatic adjustment can be performed along with the telescopic of the thoracic aorta stent, and the supporting effect and the bending effect are better;
3. the Z-shaped frames are arranged in a staggered manner in the vertical direction at intervals of 1.5 cycles, so that the integral supporting effect is better, the use of raw materials can be reduced, and the cost is reduced;
4. the irritation of the bare area to the artery wall slowly disappears as the material of the bare area degrades in the artery.
Drawings
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
fig. 2 is a schematic view of the overall structure of embodiment 2 of the present invention;
fig. 3 is a partially enlarged structural view at B in fig. 2.
Reference numerals:
10. a thoracic aortic stent; 11. a thoracic aortic stent unit; 12. a Z-shaped frame; 20. fixing a bracket; 21. a bare area part; 22. a connecting portion; 30. polyester film.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
example 1:
as shown in figure 1, the naked degradable thoracic aorta covered stent comprises a fixed stent 20 and a plurality of wavy thoracic aorta stent units 11, wherein each thoracic aorta stent unit 11 is wound into a ring shape, and the plurality of circular thoracic aorta stent units 11 are sequentially arranged to form a tubular thoracic aorta stent 10; the fixed support 20 is wavy, the fixed support 20 is wound into a ring shape, a plurality of thoracic aorta supports 10 are coated with the polyester film 30, the thoracic aorta supports 10 and the polyester film 30 are integrally tubular, the fixed support 20 is divided into an upper part and a lower part along the radial direction, the upper part and the lower part are respectively a naked area part 21 and a connecting part 22, the connecting part 22 is arranged at one end of the polyester film 30, the naked area part 21 protrudes out of one end of the polyester film 30, and the connecting part 22 is also coated with the polyester film 30; the bare area part 21 of the fixed bracket 20 is made of degradable magnesium alloy or iron alloy material, and the connecting part 22 and the thoracic aorta bracket 10 are made of medical stainless steel material or nickel-titanium alloy material;
in this embodiment, the thoracic aorta stent graft is in the shape of a straight cylinder.
In the structure, the thoracic aorta stent graft consists of a thoracic aorta stent graft 10 and a fixed stent graft 20, a plurality of independent thoracic aorta stent units 11 in the thoracic aorta stent graft 10 are fixedly coated with connecting parts 22 of the fixed stent graft 20 through polyester films 30 to form a tubular thoracic aorta stent graft, a bare area part 21 of the fixed stent graft 20 is exposed and used for fixing the thoracic aorta stent graft, moreover, the thoracic aorta of the fixed stent 20 is made of degradable magnesium alloy or iron alloy material, after the thoracic aorta covered stent is placed in the human body for a period of time, the main part of thoracic aorta tectorial membrane support fuses with thoracic aorta (need not additional structure at this moment and fix), and the naked district portion 21 that plays the fixed action is absorbed by the human body gradually, takes place to degrade, compares traditional naked district nondegradable and adopts the structure of barb, has avoided thoracic aorta tectorial membrane support to arrange the fish tail of the artery wall that the human body caused in for a long time.
Example 2:
as shown in fig. 2 and 3, in this embodiment, on the basis of embodiment 1, a plurality of Z-shaped frames 12 are disposed between adjacent thoracic aortic stent units 11, and two ends of each Z-shaped frame 12 are respectively connected to nodes of the wave-shaped structure of the adjacent thoracic aortic stent units 11. The interval between two adjacent Z-shaped frames 12 in the circumferential direction of the polyester film 30 is 1.5 cycles, and the adjacent Z-shaped frames 12 in the axial direction of the polyester film 30 are staggered.
Through setting up Z shape frame 12 can make and link into a whole between a plurality of thoracic aorta support unit 11, and the structure of Z shape frame 12 possesses certain flexible ability equally, can carry out certain automatically regulated along with thoracic aorta support 10's flexible, and the effect of support and crooked effect are better.
The interval is 1.5 periods and vertically staggered arrangement between the Z-shaped frames 12, so that the integral supporting effect is better, the use of raw materials can be reduced, and the cost is reduced.
In this embodiment, the thoracic aorta stent graft is shaped as a thick proximal and thin distal taper.
Embodiment 2 the rest of the structure and the working principle are the same as those of embodiment 1.
Example 3:
in this embodiment, the improvement is made on the basis of embodiment 1, the fixed stent 20 is formed by winding a ferrous alloy wire, and because the material of the bare area is degraded in the artery, the stimulation effect of the bare area on the artery wall is gradually eliminated.
Embodiment 3 the rest of the structure and the operation principle are the same as those of embodiment 1.
Example 4:
embodiment 4 is an improvement on embodiment 3, and the difference between this embodiment and embodiment 3 is that the fixed stent 20 in this embodiment is made by winding magnesium alloy wires, and because the material of the bare area is degraded in the artery, the irritation of the bare area to the artery wall will slowly disappear.
Example 5:
example 5 is an improvement over example 1 in that the magnesium or iron alloy wire is provided with an application slot closed at both ends along the axial side surface thereof.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.
Claims (4)
1. A naked area degradable thoracic aorta covered stent is characterized by comprising a fixed stent and a plurality of wavy thoracic aorta stent units, wherein each thoracic aorta stent unit is wound into a ring shape, and the plurality of circular wound thoracic aorta stent units are sequentially arranged to form a tubular thoracic aorta stent; the fixing support is in a wave shape and wound into a ring shape, a plurality of thoracic aorta supports are coated with polyester films, the thoracic aorta supports and the polyester films are integrally in a tubular shape, the fixing support is divided into an upper part and a lower part along the radial direction of the fixing support, the upper part and the lower part are respectively a naked area part and a connecting part, the connecting part is arranged at one end of the polyester films, the naked area part protrudes out of one end of the polyester films, and the connecting part is also coated with the polyester films; the naked area part of the fixed support is made of degradable magnesium alloy or iron alloy material, and the connecting part and the thoracic aorta support are made of medical stainless steel material or nickel-titanium alloy material.
2. The bare region degradable thoracic aorta stent graft according to claim 1, wherein a plurality of Z-shaped frames are disposed between adjacent thoracic aorta stent units, and two ends of each Z-shaped frame are connected to nodes of the wave-shaped structure of the adjacent thoracic aorta stent units.
3. The bare area degradable thoracic aorta stent graft of claim 2, wherein the interval between two adjacent Z-shaped stents in the circumferential direction of the polyester film is 1.5 cycles, and the adjacent Z-shaped stents in the axial direction of the polyester film are staggered.
4. The bare area degradable thoracic aorta covered stent of claim 1, wherein the fixed stent is formed by winding a magnesium alloy wire or an iron alloy wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921684395.6U CN211300518U (en) | 2019-10-09 | 2019-10-09 | Naked district degradable thoracic aorta covered stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921684395.6U CN211300518U (en) | 2019-10-09 | 2019-10-09 | Naked district degradable thoracic aorta covered stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211300518U true CN211300518U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921684395.6U Expired - Fee Related CN211300518U (en) | 2019-10-09 | 2019-10-09 | Naked district degradable thoracic aorta covered stent |
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| CN (1) | CN211300518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110721007A (en) * | 2019-10-09 | 2020-01-24 | 中国人民解放军西部战区总医院 | Naked district degradable thoracic aorta covered stent |
-
2019
- 2019-10-09 CN CN201921684395.6U patent/CN211300518U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110721007A (en) * | 2019-10-09 | 2020-01-24 | 中国人民解放军西部战区总医院 | Naked district degradable thoracic aorta covered stent |
| CN110721007B (en) * | 2019-10-09 | 2024-08-13 | 中国人民解放军西部战区总医院 | Degradable thoracic aortic tectorial membrane support in bare area |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 Termination date: 20211009 |
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| CF01 | Termination of patent right due to non-payment of annual fee |