CN110063826A - A kind of encephalic drug stent - Google Patents
A kind of encephalic drug stent Download PDFInfo
- Publication number
- CN110063826A CN110063826A CN201910496392.8A CN201910496392A CN110063826A CN 110063826 A CN110063826 A CN 110063826A CN 201910496392 A CN201910496392 A CN 201910496392A CN 110063826 A CN110063826 A CN 110063826A
- Authority
- CN
- China
- Prior art keywords
- encephalic
- drawn yarn
- rack body
- drug stent
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—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
- 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
- A61F2250/0065—Additional features; Implant or prostheses properties not otherwise provided for telescopic
-
- 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
- A61F2250/0067—Means for introducing or releasing pharmaceutical products into the body
-
- 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
Abstract
The invention discloses a kind of encephalic drug stents, including rack body, the rack body includes the first drawn yarn and the second drawn yarn, the outer surface of the rack body is fixedly connected with raised riser, the inside of the protrusion riser is plugged with buffer subsystem, the protrusion riser is fixedly connected with development mark close to the side of buffer subsystem, and the side of the rack body is fixedly connected with the first connection lump, and the side of the connection lump is connected with the first conduit.The encephalic drug stent, pass through the setting of the first drawn yarn and the second drawn yarn, so that first drawn yarn of encephalic drug stent in use and the second drawn yarn intersect and form diamond-mesh structure, and each diamond-mesh structure is staggered up and down and can effectively improve the radial support power of the encephalic drug stent, preferably attach vascular wall, it is not easy to be displaced, and the network structure of the bracket is unlikely to deform than Z-shaped and corrugated structure uniform force.
Description
Technical field
The present invention relates to intracranial stent technical field, specially a kind of encephalic drug stent.
Background technique
Intracranial atherosclerotic stenosis disease (intracranial atheroscleroticstenosis, ICS)
It is the major reason of Ischemic Stroke.Some researches show that 1 year stroke recurrence rates of severe ICS patient (stenosis rate 70%-90%)
Up to 23%.The narrow treatment of intracranial artery support mainly includes drug therapy, Surgery and surgical intervention.Surgery hand
Art treatment seriously limits its clinical application due to its high case fatality rate, high disability rate and high-tech requirement.Surgery
It include simple balloon dilatation and intravascular stenting.Interventional therapy method restores fast, answers because its wound is small
With gradually being popularized.One of stent endoprosthesis disadvantage is in-stent restenosis, and stent restenosis rate may be up to 53%.Bracket is again
Narrow reason is that blood vessel causes injury of blood vessel after stent-expansion, to cause endangium hyperplasia, eventually leads to
The restenosis of blood vessel, and current some intracranial stents, although certain expansion can be played, existing encephalic
Bracket is greatly most without telescopicing performance, and expansion is uneven, and therapeutic effect is undesirable.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of encephalic drug stent, have that retractility is good, expansion is compared
The advantages that uniform therapeutic effect is more satisfactory solves the telescopicing performance that do not have of existing intracranial stent, and expansion is uneven, controls
The undesirable problem of therapeutic effect.
(2) technical solution
To realize that above-mentioned encephalic drug stent has the mesh that retractility is good, expands relatively uniform and therapeutic effect compares reason
, the invention provides the following technical scheme: a kind of encephalic drug stent, including rack body, the rack body include first
Drawn yarn and the second drawn yarn, the outer surface of the rack body are fixedly connected with raised riser, the inside of the protrusion riser
It is plugged with buffer subsystem, the protrusion riser is fixedly connected with development close to the side of buffer subsystem and identifies, and the one of the rack body
Side is fixedly connected with the first connection lump, and the side of the connection lump is connected with the first conduit, and the rack body is remote
One end from the first connection lump is fixedly connected with the second connection lump, and the side of the second connection lump is connected with the
Two conduits, the inside of the rack body are fixedly connected with expanded film, and the outer surface of the expanded film, which is fixedly connected with, wraps up in bag.
Preferably, first drawn yarn and the second drawn yarn, which intersect, forms rhombus net, the axial direction of the rhombus net
Angle is 60 degree.
Preferably, the left and right ends of the rack body are oval, the angle between the oval conical surface and horizontal plane
It is 45 degree.
Preferably, first drawn yarn and the second drawn yarn quantity are several, several described first drawn yarns
Outer diameter with the second drawn yarn is 0.03 millimeter.
Preferably, the material of first drawn yarn and the second drawn yarn is Nitinol.
Preferably, it is rectangle structure that the first connection lump, which connect lump with second,.
Preferably, the maximum value of the rack body expanded outer diameter is 3.5 millimeters.
Preferably, described to wrap up in after bag expands in truncated cone-shaped structure.
Preferably, the angle of weave range of the buffer subsystem is 45 degree to 120 degree, the hole of the buffer subsystem
Diameter range is 20 to 400 microns, and the material of the buffer subsystem is Nitinol.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of encephalic drug stent, have it is following the utility model has the advantages that
1, encephalic drug stent, by the setting of the first drawn yarn and the second drawn yarn, so that the encephalic in use
The first drawn yarn of drug stent and the second drawn yarn, which intersect, forms diamond-mesh structure, and above and below each diamond-mesh structure
The radial support power of the encephalic drug stent can be effectively improved by being staggered, preferably attaching vascular wall, be not easy to be displaced, and should
The network structure of bracket is unlikely to deform than Z-shaped and corrugated structure uniform force, greatly improves therapeutic effect.
2, the encephalic drug stent, by the setting of expanded film, so that in use, staff is by the encephalic drug branch
Frame is implanted to the inside of blood vessel, since blood is flowed into from the first conduit the inside of rack body, the pouch inside rack body
The blood being flowed into inside pouch can be stored, so that pouch expands, pouch expansion will lead to volume increase, so that branch
Frame body product slowly becomes larger, and the first drawn yarn and the second drawn yarn is then driven to expand, and plays the role of supporting ductus arteriosus wall, and
And pouch quantity is several, covers entire expanded film, so that expansion is relatively uniform, achievees the purpose that practical.
3. the encephalic drug stent, by the setting of raised riser, so that in use, which enters blood vessel
Among after, when blood enters blood vessel, enabling to the pressure of blood that can be buffered to greatest extent, increasing greatly
Strong the practicality when so that blood passes through buffer subsystem, can be such that pressure further decreases, blood vessel by the setting of buffer subsystem
The impact being subject to can further decrease, and substantially reduce the potential risk that bracket occurs during implant surgery.
Detailed description of the invention
Fig. 1 is a kind of encephalic drug stent positive structure diagram proposed by the present invention；
Fig. 2 is a kind of encephalic drug stent rack body structural schematic diagram proposed by the present invention；
Fig. 3 is a kind of encephalic drug stent schematic diagram of internal structure proposed by the present invention；
Fig. 4 is enlarged structure schematic diagram at A in a kind of encephalic drug stent Fig. 2 proposed by the present invention；
Fig. 5 is enlarged structure schematic diagram at B in a kind of encephalic drug stent Fig. 3 proposed by the present invention；
Fig. 6 is that a kind of encephalic drug stent proposed by the present invention expands membrane structure diagram.
In figure: 1, rack body 2, the first drawn yarn 3, the second drawn yarn 4, raised riser 5, buffer subsystem 6, development mark 7,
First connection lump 8, the second conduit 11, expanded film 12, wraps up in bag at first conduit 9, second connection lump 10.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-5, a kind of encephalic drug stent, including rack body 1, rack body 1 include the first drawn yarn 2 with
Second drawn yarn 3, by the setting of the first drawn yarn 2 and the second drawn yarn 3, so that the encephalic drug stent first in use
Drawn yarn 2 and the second drawn yarn 3, which intersect, forms diamond-mesh structure, and being staggered above and below each diamond-mesh structure can
The radial support power of the encephalic drug stent is effectively improved, preferably attaching vascular wall, is not easy to be displaced, and the diamond shape of the bracket
Network is unlikely to deform than Z-shaped and corrugated structure uniform force, greatly improves therapeutic effect, rack body 1 it is outer
Surface is fixedly connected with raised riser 4, by the setting of raised riser 4, so that in use, which enters blood
After among pipe, when blood enters blood vessel, enabling to the pressure of blood that can be buffered to greatest extent, significantly
Enhance the practicality, the inside of raised riser 4 is plugged with buffer subsystem 5, by the setting of buffer subsystem 5, so that blood passes through buffering
When net 5, pressure can be made to further decrease, the impact that blood vessel is subject to can further decrease, and substantially reduce bracket in implantation hand
The potential risk occurred during art, raised riser 4 are fixedly connected with development mark 6, rack body close to the side of buffer subsystem 5
1 side is fixedly connected with the first connection lump 7, and the side of connection lump 7 is connected with the first conduit 8, and rack body 1 is remote
One end from the first connection lump 7 is fixedly connected with the second connection lump 9, and the side of the second connection lump 9 is connected with the
Two conduits 10, the inside of rack body 1 are fixedly connected with expanded film 11, are arranged by expanded film 11, so that in use, work
The encephalic drug stent is implanted to the inside of blood vessel by personnel, since blood is flowed into from the first conduit the inside of rack body 1,
Pouch 12 inside rack body 1 can store the blood being flowed into inside pouch 12, so that pouch 12 expands, pouch
12 expansions will lead to volume increase, so that bracket volume slowly becomes larger, then drive the first drawn yarn 2 and the second drawn yarn 3
Expansion is played the role of supporting ductus arteriosus wall, and 12 quantity of pouch is several, covers entire expanded film 11, so that
It expands relatively uniform, achievees the purpose that practical, the outer surface of expanded film 11, which is fixedly connected with, wraps up in bag 12, and pouch 12 can be right
It is flowed into the blood inside pouch 12 to be stored, so that pouch 12 expands, the expansion of pouch 12 will lead to volume increase, so that branch
Frame body product slowly becomes larger, and the first drawn yarn 2 and the second drawn yarn 3 is then driven to expand, and plays the role of supporting ductus arteriosus wall,
First drawn yarn 2 and the second drawn yarn 3 intersect and form rhombus net, and the axial angle of rhombus net is 60 degree, rack body 1
Left and right ends are oval, and the angle between the oval conical surface and horizontal plane is 45 degree, the first drawn yarn 2 and the second drawn yarn
3 quantity are several, and the outer diameter of several first drawn yarns 2 and the second drawn yarn 3 is 0.03 millimeter, the first drawn yarn 2
Material with the second drawn yarn 3 is Nitinol, and it is rectangle structure that the first connection lump 7, which connect lump 9 with second, branch
The maximum value of 1 expanded outer diameter of frame ontology is 3.5 millimeters, is wrapped up in after bag 12 expands in truncated cone-shaped structure, the angle of weave model of buffer subsystem 5
Enclosing is 45 degree to 120 degree, and the pore diameter range of buffer subsystem 5 is 20 to 400 microns, and the material of buffer subsystem 5 is nickel
Titanium alloy.
In conclusion the encephalic drug stent, by the setting of the first drawn yarn 2 and the second drawn yarn 3, so that using
In encephalic drug stent first drawn yarn 2 and the second drawn yarn 3 intersect and form diamond-mesh structure, and each rhombus net
Shape structure is staggered up and down can effectively improve the radial support power of the encephalic drug stent, preferably attaching vascular wall, be not easy
Displacement, and the network structure of the bracket is unlikely to deform, greatly improves than Z-shaped and corrugated structure uniform force
Therapeutic effect is arranged by expanded film 11, so that in use, which is implanted in blood vessel by staff
Portion, since blood is flowed into from the first conduit the inside of rack body 1, the pouch 12 inside rack body 1 can be to being flowed into
Blood inside pouch 12 is stored, so that pouch 12 expands, the expansion of pouch 12 will lead to volume increase, so that bracket volume
Slowly become larger, the first drawn yarn 2 and the second drawn yarn 3 is then driven to expand, plays the role of supporting ductus arteriosus wall, and capsule
12 quantity of bag are several, cover entire expanded film 11, so that expansion is relatively uniform, achieve the purpose that practical, lead to
The setting of raised riser 4 is crossed, so that in use, after which enters among blood vessel, entering blood vessel when blood
When, it enables to the pressure of blood that can be buffered to greatest extent, greatly enhances the practicality, pass through buffer subsystem 5
Setting can be such that pressure further decreases when so that blood passes through buffer subsystem 5, and the impact that blood vessel is subject to can further decrease,
Substantially reduce the potential risk that bracket occurs during implant surgery.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including one ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of encephalic drug stent, including rack body (1), it is characterised in that: the rack body (1) includes the first stretching
Silk (2) and the second drawn yarn (3), the outer surface of the rack body (1) are fixedly connected with raised riser (4), and the protrusion emits
The inside of mouth (4) is plugged with buffer subsystem (5), and the protrusion riser (4) is fixedly connected with development mark close to the side of buffer subsystem (5)
Know (6), the side of the rack body (1) is fixedly connected with the first connection lump (7), and the side of connection lump (7) is living
Dynamic to be connected with the first conduit (8), the rack body (1) is fixedly connected with the second company far from one end of the first connection lump (7)
Connect lump (9), it is described second connection lump (9) side be connected with the second conduit (10), the rack body (1) it is interior
Portion is fixedly connected with expanded film (11), and the outer surface of the expanded film (11), which is fixedly connected with, wraps up in bag (12).
2. a kind of encephalic drug stent according to claim 1, it is characterised in that: first drawn yarn (2) and second
Drawn yarn (3), which intersects, forms rhombus net, and the axial angle of the rhombus net is 60 degree.
3. a kind of encephalic drug stent according to claim 1, it is characterised in that: the left and right two of the rack body (1)
End is oval, and the angle between the oval conical surface and horizontal plane is 45 degree.
4. a kind of encephalic drug stent according to claim 1, it is characterised in that: first drawn yarn (2) and second
Drawn yarn (3) quantity is several, and the outer diameter of several described first drawn yarns (2) and the second drawn yarn (3) is 0.03
Millimeter.
5. a kind of encephalic drug stent according to claim 1, it is characterised in that: first drawn yarn (2) and second
The material of drawn yarn (3) is Nitinol.
6. a kind of encephalic drug stent according to claim 1, it is characterised in that: first connection lump (7) and the
Two connections lump (9) are rectangle structure.
7. a kind of encephalic drug stent according to claim 1, it is characterised in that: rack body (1) expanded outer diameter
Maximum value be 3.5 millimeters.
8. a kind of encephalic drug stent according to claim 1, it is characterised in that: described to wrap up in after bag (12) expand in rotary table
Shape structure.
9. a kind of encephalic drug stent according to claim 1, it is characterised in that: the angle of weave of the buffer subsystem (5)
Range is 45 degree to 120 degree, and the pore diameter range of the buffer subsystem (5) is 20 to 400 microns, the buffer subsystem
(5) material is Nitinol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496392.8A CN110063826A (en) | 2019-06-10 | 2019-06-10 | A kind of encephalic drug stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496392.8A CN110063826A (en) | 2019-06-10 | 2019-06-10 | A kind of encephalic drug stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110063826A true CN110063826A (en) | 2019-07-30 |
Family
ID=67372722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910496392.8A Pending CN110063826A (en) | 2019-06-10 | 2019-06-10 | A kind of encephalic drug stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110063826A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110731835A (en) * | 2019-10-25 | 2020-01-31 | 郑州美港高科生物科技有限公司 | Polymer renal artery stent |
| CN110731833A (en) * | 2019-10-25 | 2020-01-31 | 郑州美港高科生物科技有限公司 | Iron-based alloy vertebral artery degradable stent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040034408A1 (en) * | 2002-05-10 | 2004-02-19 | Majercak David Christopher | Method of placing a tubular membrane on a structural frame |
| CN201469464U (en) * | 2009-07-13 | 2010-05-19 | 成正辉 | Plastic repair bracket in blood vessels of cerebral aneurysm and conveying device thereof |
| CN201879874U (en) * | 2010-12-15 | 2011-06-29 | 姜卫剑 | Self-expandable encephalic artery stent |
| CN202908770U (en) * | 2012-11-01 | 2013-05-01 | 北京泰杰伟业科技有限公司 | Recyclable dense mesh support |
| CN205758775U (en) * | 2016-04-22 | 2016-12-07 | 内蒙古工业大学 | A kind of Self-expandable encephalic artery holder device |
| CN206867313U (en) * | 2017-01-05 | 2018-01-12 | 贾明月 | Conduit for the conveying of intracranial vessel support |
| CN207804431U (en) * | 2017-04-14 | 2018-09-04 | 武汉唯柯医疗科技有限公司 | A kind of close net holder of recyclable multilayer |
| CN210301318U (en) * | 2019-06-10 | 2020-04-14 | 郑州美港高科生物科技有限公司 | Intracranial drug bracket |
-
2019
- 2019-06-10 CN CN201910496392.8A patent/CN110063826A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040034408A1 (en) * | 2002-05-10 | 2004-02-19 | Majercak David Christopher | Method of placing a tubular membrane on a structural frame |
| CN201469464U (en) * | 2009-07-13 | 2010-05-19 | 成正辉 | Plastic repair bracket in blood vessels of cerebral aneurysm and conveying device thereof |
| CN201879874U (en) * | 2010-12-15 | 2011-06-29 | 姜卫剑 | Self-expandable encephalic artery stent |
| CN202908770U (en) * | 2012-11-01 | 2013-05-01 | 北京泰杰伟业科技有限公司 | Recyclable dense mesh support |
| CN205758775U (en) * | 2016-04-22 | 2016-12-07 | 内蒙古工业大学 | A kind of Self-expandable encephalic artery holder device |
| CN206867313U (en) * | 2017-01-05 | 2018-01-12 | 贾明月 | Conduit for the conveying of intracranial vessel support |
| CN207804431U (en) * | 2017-04-14 | 2018-09-04 | 武汉唯柯医疗科技有限公司 | A kind of close net holder of recyclable multilayer |
| CN210301318U (en) * | 2019-06-10 | 2020-04-14 | 郑州美港高科生物科技有限公司 | Intracranial drug bracket |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110731835A (en) * | 2019-10-25 | 2020-01-31 | 郑州美港高科生物科技有限公司 | Polymer renal artery stent |
| CN110731833A (en) * | 2019-10-25 | 2020-01-31 | 郑州美港高科生物科技有限公司 | Iron-based alloy vertebral artery degradable stent |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190730 |
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