CN108158702A - Stent and stent system - Google Patents
Stent and stent system Download PDFInfo
- Publication number
- CN108158702A CN108158702A CN201810157397.3A CN201810157397A CN108158702A CN 108158702 A CN108158702 A CN 108158702A CN 201810157397 A CN201810157397 A CN 201810157397A CN 108158702 A CN108158702 A CN 108158702A
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- stent
- spacing ring
- rack body
- limiting section
- present
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- 230000000452 restraining effect Effects 0.000 claims abstract description 4
- 229940079593 drug Drugs 0.000 claims description 15
- 239000003814 drug Substances 0.000 claims description 15
- 208000037803 restenosis Diseases 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910001362 Ta alloys Inorganic materials 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 2
- 229910001020 Au alloy Inorganic materials 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052759 nickel Inorganic materials 0.000 claims 1
- 210000002385 vertebral artery Anatomy 0.000 description 43
- 210000003270 subclavian artery Anatomy 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 210000001367 artery Anatomy 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000001361 intraarterial administration Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 206010008118 cerebral infarction Diseases 0.000 description 2
- 208000026106 cerebrovascular disease Diseases 0.000 description 2
- 210000003109 clavicle Anatomy 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 201000006474 Brain Ischemia Diseases 0.000 description 1
- 206010008120 Cerebral ischaemia Diseases 0.000 description 1
- 238000012276 Endovascular treatment Methods 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 206010050902 Postoperative thrombosis Diseases 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000004351 coronary vessel Anatomy 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000302 ischemic effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 208000021090 palsy Diseases 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/954—Instruments specially adapted for placement or removal of stents or stent-grafts for placing stents or stent-grafts in a bifurcation
-
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- 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
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2002/9505—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
- A61F2002/9511—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument the retaining means being filaments or wires
Landscapes
- 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)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The present invention relates to the field of medical instrument technology, more particularly, to a kind of stent and stent system.Stent includes rack body and leading silk；Restraining position ring block is set on the rack body；Limiting section is provided on the leading silk；The leading silk can pass through the spacing ring, and the limiting section cannot pass through the spacing ring.Stent system includes branch's seal wire and the stent.The purpose of the present invention is to provide a kind of stent and stent system, with before the stent during Y type bifurcated arterial ostiums stent is overcome to discharge to or retreat and shift.
Description
Technical field
The present invention relates to the field of medical instrument technology, more particularly, to a kind of stent and stent system.
Background technology
In Y type bifurcateds artery in human body for a kind of common artery, for example, vertebral artery from subclavian artery be in Y type tendencies
It separates, to supply brain, below by taking vertebral artery as an example.
Narrow vertebral artery opening is common ischemic cerebrovascular disease, can cause the symptoms of cerebral ischemia such as dizziness and cerebral infarction.
It is narrow that stent in the treatment can improve vertebral artery opening, increase forward blood flow, and reduce palsy risk.It is open for vertebral artery narrow,
It is generally treated at present using balloon expandable stent.Shown in Figure 1, Fig. 1 is the structural representation of stent in the prior art
Figure；Stent (Stent) is common medical instrument in blood vessel intervention operation, for strutting hardening, narrow artery, is opened
The blood vessel of occlusion, wherein, stent is is compressed on the sacculus that can be filled mounted on one by balloon expandable stent in advance.During treatment,
The position that superfine seal wire is first passed through arteriarctia by doctor；Then, the stent sacculus and on sacculus is along seal wire
It is transported to narrow positions；Finally, Filled Balloon struts stent, by stent support at arteriarctia, prevents its retraction.It exits and removes
Outside stent after all instruments, stent has been left at the arteriarctia being expanded.
However, referring to shown in Fig. 2-Fig. 4, Fig. 2 is the stent structural representation that forward direction shifts in vertebral artery in the prior art
Figure；Fig. 3 is the structure diagram that stent retreats displacement in vertebral artery in the prior art；Fig. 4 is stent in the prior art in vertebra
Intra-arterial is located at the structure diagram of ideal position；Due to the narrow reaction force to sacculus, stent of artery, branch is often resulted in
Forward direction or retrogressing displacement during frame release, without reaching ideal position in Fig. 4.Forward direction displacement can make stent 3 ' whole excessive
Narrow positions cannot be covered so as to cause stent 3 ' by slipping into vertebral artery 1 '；Retreating displacement then makes 3 ' proximal segment of stent be retracted into clavicle backward
Lower artery 2 ', is exposed to so as to cause stent 3 ' in the blood flow of subclavian artery 2 ', and then influences normal subclavian artery blood
The endothelialization process of stream and stent, increases the risk of postoperative thrombosis, and follow-up endovascular treatment again is made to become difficult.
Therefore, the application provides a kind of new stent and stent system regarding to the issue above.
Invention content
The purpose of the present invention is to provide a kind of stent, to overcome the branch during the release of Y type bifurcated arterial ostiums stent
Before frame to or retreat shift.
The present invention also aims to provide a kind of stent system, Y type bifurcated arterial ostium stents further to be overcome to release
Before stent during putting to or retreat shift.
Based on above-mentioned first purpose, the present invention provides a kind of stent, including rack body and leading silk；
Restraining position ring block is set on the rack body；
Limiting section is provided on the leading silk；
The leading silk can pass through the spacing ring, and the limiting section cannot pass through the spacing ring.
In any of the above-described technical solution, further, limiting section of the present invention is in sphere or cylinder, and described
The center line of leading silk passes through the centre of sphere of the sphere or the axis of the cylinder；
The diameter of the sphere is more than the internal diameter of the spacing ring, alternatively, the diameter of the cylinder is more than the limiting
The internal diameter of ring.
In any of the above-described technical solution, further, spacing ring of the present invention and the rack body are integrally formed.
In any of the above-described technical solution, further, the internal diameter of spacing ring of the present invention is 0.3mm-0.5mm.
In any of the above-described technical solution, further, rack body of the present invention is metal net shaped pipe.
In any of the above-described technical solution, further, the material of rack body of the present invention is 316L stainless steels,
Nickel alloy or tantalum alloy.
In any of the above-described technical solution, further, the axis of rack body of the present invention and the spacing ring
Angle between center line is 0 ° -90 °.
In any of the above-described technical solution, further, axis direction of the present invention along the rack body, the stent
Main body includes corresponding first end and second end；
The spacing ring is located at the first end or the second end；Alternatively, the spacing ring is located at the stent master
Between the first end and the second end of body.
In any of the above-described technical solution, further, stent of the present invention further includes medication coat；
The medication coat is coated on the outer surface of the rack body；
The medication coat contains anti-restenosis drug ingredient.
Based on above-mentioned second purpose, the present invention provides a kind of stent system, including branch's seal wire and the stent.
Using above-mentioned technical proposal, the present invention has the advantages that：
Stent is used for Y type bifurcated intra-arterials, below by taking vertebral artery as an example.During operation, branch's seal wire is built into vertebral artery,
Leading silk is passed through into spacing ring, and limiting section is located at spacing ring proximal end, and rack body is delivered into vertebra along branch's seal wire and is moved
Arteries and veins, and leading silk is enabled to enter subclavian artery, leading silk is continued to push ahead in subclavian artery, to enable limiting section limit
Position ring is pressed in the edge outside vertebral artery opening.In conclusion rack body has been enter into vertebral artery branch, and spacing ring is stuck in branch
The crotch of seal wire and leading silk, thus rack body cannot shift forward；In addition, due to compressing of the limiting section to spacing ring,
Rack body cannot retreat the limiting for shifting namely completing to mount proximal end, even if the later stage carries out Filled Balloon and release
Stent, stent will not shift, overcome Y type bifurcated arterial ostiums stent release during stent before to or retreat shift
The problem of.
The present invention provides a kind of stent system, including branch's seal wire and the stent, further overcomes Y type bifurcateds and moves
Arteries and veins open stand release during stent before to or retreat shift.
The additional aspect and advantage of the present invention will become practice apparent or by the present invention in following description section
Recognize.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range, for those of ordinary skill in the art, without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structure diagram of stent in the prior art；
Fig. 2 is the structure diagram of stent forward direction displacement in vertebral artery in the prior art；
Fig. 3 is the structure diagram that stent retreats displacement in vertebral artery in the prior art；
Fig. 4 is the structure diagram that stent is located at ideal position in vertebral artery in the prior art；
Fig. 5 is the structure diagram of stent provided in an embodiment of the present invention；
Fig. 6 is the structure diagram that stent provided in an embodiment of the present invention is in first state in vertebral artery；
Fig. 7 is the structure diagram that stent provided in an embodiment of the present invention is in the second state in vertebral artery.
Icon：1 '-vertebral artery；2 '-subclavian artery；3 '-stent；
1- rack bodies；2- spacing rings；3- dominates silk；4- limiting sections；5- vertebral arterys；6- subclavian arteries；7- branches lead
Silk；8- sacculus.
Specific embodiment
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's all other embodiments obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instructions such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Convenient for the description present invention and simplify description rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is only used for description purpose, and it is not intended that instruction or hint relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Embodiment one
Referring to shown in Fig. 5-Fig. 7, Fig. 6 is the knot that stent provided in an embodiment of the present invention is in first state in vertebral artery
Structure schematic diagram；Fig. 7 is the structure diagram that stent provided in an embodiment of the present invention is in the second state in vertebral artery, wherein,
First state is in state when preparing release for stent, and sacculus does not fill at this time；After second state is successfully discharged for stent
State, at this time sacculus fill.
The present embodiment provides a kind of stent, including rack body 1 and leading silk 3；
Restraining position ring block 2 is set on the rack body 1；
Limiting section 4 is provided on the leading silk 3；
The leading silk 3 can pass through the spacing ring 2, and the limiting section 4 cannot pass through the spacing ring 2.
Preferably, limiting section is set between leading silk both ends.
Stent provided in this embodiment is used for Y type bifurcated intra-arterials, below by taking vertebral artery as an example.During operation, in vertebral artery 5
Branch's seal wire 7 is built into, leading silk 3 is passed through into spacing ring 2, and limiting section 4 is located at 2 proximal end of spacing ring, and by rack body 1
Vertebral artery 5 is delivered into along branch's seal wire 7, and leading silk 3 is enabled to enter subclavian artery 6, by leading silk 3 in subclavian artery 6
Inside continue to push ahead, with enable limiting section 4 spacing ring 2 be pressed in vertebral artery 5 be open outside edge.
In conclusion rack body has been enter into vertebral artery branch, and spacing ring is stuck in the bifurcated of branch's seal wire and leading silk
Place, thus rack body cannot shift forward；In addition, due to compressing of the limiting section to spacing ring, rack body cannot after retire
Position namely limiting to mount proximal end is completed, will not be moved even if the later stage carries out Filled Balloon 8 and release stent, stent
Position, overcome Y type bifurcated arterial ostiums stent release during stent before to or retreat shift the problem of.
Optionally, the limiting section 4 is in sphere or cylinder, and the center line of the leading silk 3 passes through the sphere
The centre of sphere or the cylinder axis；
The diameter of the sphere is more than the internal diameter of the spacing ring 2, alternatively, the diameter of the cylinder is more than the limiting
The internal diameter of ring 2.
During so as to which leading silk being enabled to pass through spacing ring, limiting section cannot pass through spacing ring, and be set with spacing ring card, and then realize
Spacing ring is proximally pressed in the edge outside vertebral artery opening by limiting section.
Preferably, the spacing ring 2 and the rack body 1 are integrally formed.Alternatively, the spacing ring and the stent master
Body is connected by way of being detachably connected.
Optionally, the internal diameter of the spacing ring 2 is 0.3mm-0.5mm.
Optionally, the internal diameter of the spacing ring 2 is 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm etc..
Shown in Figure 5 as a kind of achievable mode, rack body 1 described in the present embodiment is metal net shaped pipe.
It should be noted that the present embodiment rack body can also be annular support or winding-type stent.
As a kind of preferred mode, the material of the rack body 1 is 316L stainless steels, nickel alloy or tantalum alloy.
Enable rack body that not only there is toughness, but also with hardness, the toughness of rack body, then can it is indefinite by direction, point
The larger coronary artery of branch angle；The hardness of rack body can then prop up the artery stenosis inner cavity expanded, make it will not
Retraction.
Preferably, the angle between the axis of the rack body 1 and the center line of the spacing ring 2 is 0 ° -90 °.
Optionally, the angle between the center line of the axis of the rack body and the spacing ring for 0 °, 5 °, 10 °,
15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 70 °, 80 °, 90 ° etc..
During rack body being enabled to be placed in vertebral artery branch, leading silk can pass through limit along the extending direction of subclavian artery
Position ring.
Along the axis direction of the rack body 1, the rack body 1 includes corresponding first end and second end；
The spacing ring 2 is located at the first end or the second end；Alternatively, the spacing ring 2 is located at the stent
Between the first end and the second end of main body 1.
That is, end or the position by close end that spacing ring can be set to rack body, visual actual needs system
Make different specifications, to adapt to different conditions.
Preferably, the stent described in the present embodiment, further includes medication coat；
The medication coat is coated on the outer surface of the rack body；
The medication coat contains anti-restenosis drug ingredient.
Medication coat discharges anti-restenosis drug, can effectively prevent the generation of restenosis；Medication coat is located at rack body
Outer surface, it is advantageous that " orientation " acts only on vascular wall, while can prevent restenosis, and do not influence intravascular
The process of skin.
Embodiment two
Embodiment two provides a kind of stent system, and the stent system includes the stent described in embodiment one, embodiment
The technical characteristic of stent disclosed in one is also applied for the embodiment, and the technical characteristic of one published stent of embodiment is no longer heavy
Multiple description.The embodiment of the stent system is described in further detail below in conjunction with the accompanying drawings.
To save length, the improvement feature of the embodiment is equally embodied in Fig. 5-Fig. 7, therefore, with reference to Fig. 5-Fig. 7 to this
The scheme of embodiment illustrates.
Referring to shown in Fig. 5-Fig. 7, stent system provided in this embodiment, including branch's seal wire 7 and the stent.
Stent system provided in this embodiment is used for Y type bifurcated intra-arterials, below by taking vertebral artery as an example.
During operation, branch's seal wire is built into vertebral artery, leading silk is passed through into spacing ring, and to be located at spacing ring near for limiting section
End, and rack body is entered into vertebral artery, and leading silk is enabled to enter subclavian artery along branch's seal wire, by leading silk under clavicle
Intra-arterial continues to push ahead, with enable limiting section spacing ring be pressed in vertebral artery opening outside edge.
In conclusion rack body has been enter into vertebral artery branch, and spacing ring is stuck in the bifurcated of branch's seal wire and leading silk
Place, thus rack body cannot shift forward；In addition, due to compressing of the limiting section to spacing ring, rack body cannot after retire
Position namely limiting to mount proximal end is completed, even if the later stage carries out full air bag and discharges stent, stent will not move
Position, further overcome Y type bifurcated arterial ostiums stent release during stent before to or retreat shift the problem of.
Optionally, the limiting section 4 is in sphere or cylinder, and the center line of the leading silk 3 passes through the sphere
The centre of sphere or the cylinder axis；
The diameter of the sphere is more than the internal diameter of the spacing ring 2, alternatively, the diameter of the cylinder is more than the limiting
The internal diameter of ring 2.
During so as to which leading silk being enabled to pass through spacing ring, limiting section cannot pass through spacing ring, and be set with spacing ring card, and then realize
Spacing ring is proximally pressed in the edge outside vertebral artery opening by limiting section.
Preferably, the spacing ring 2 and the rack body 1 are integrally formed.Alternatively, the spacing ring and the stent master
Body is connected by way of being detachably connected.
Optionally, the internal diameter of the spacing ring 2 is 0.3mm-0.5mm.
Optionally, the internal diameter of the spacing ring 2 is 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm etc..
Shown in Figure 5 as a kind of achievable mode, rack body 1 described in the present embodiment is metal net shaped pipe.
It should be noted that the present embodiment rack body can also be annular support or winding-type stent.
Stent system described in the present embodiment has the advantages that stent described in embodiment one, and the advantage is in embodiment one
It is described in detail, is not repeated herein.
Embodiment three
Embodiment three provides a kind of vertebral artery open stand, and the vertebral artery open stand is included described in embodiment one
Stent, the technical characteristic of the stent disclosed in embodiment one are also applied for the embodiment, the skill of one published stent of embodiment
Art feature is not repeated to describe.The embodiment of the vertebral artery open stand is carried out below in conjunction with the accompanying drawings further detailed
Explanation.
To save length, the improvement feature of the embodiment is equally embodied in Fig. 5-Fig. 7, therefore, with reference to Fig. 5-Fig. 7 to this
The scheme of embodiment illustrates.
Referring to shown in Fig. 5-Fig. 7, vertebral artery open stand provided in this embodiment, including the stent, during operation,
Vertebral artery is built into branch's seal wire, leading silk is passed through spacing ring, and limiting section is located at spacing ring proximal end, and by rack body edge
Branch's seal wire enters vertebral artery, and leading silk is enabled to enter subclavian artery, and leading silk is continued in subclavian artery to being pushed forward
Into, with enable limiting section spacing ring be pressed in vertebral artery opening outside edge.
In conclusion rack body has been enter into vertebral artery branch, and spacing ring is stuck in the bifurcated of branch's seal wire and leading silk
Place, thus rack body cannot shift forward；In addition, due to compressing of the limiting section to spacing ring, rack body cannot after retire
Position namely limiting to mount proximal end is completed, even if the later stage carries out full air bag and discharges stent, stent will not move
Position, overcome vertebral artery open stand release during stent before to or retreat shift the problem of.
Vertebral artery open stand described in the present embodiment has the advantages that stent described in embodiment one, which is implementing
It is described in detail in example one, is not repeated herein.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments means in of the invention
Within the scope of and form different embodiments.For example, in claims above, embodiment claimed is appointed
One of meaning mode can use in any combination.The information for being disclosed in the background technology part is merely intended to deepen to this
The understanding of the general background technology of invention, and be not construed as recognizing or imply that information composition has been ability in any form
The prior art well known to field technique personnel.
Claims (10)
1. a kind of stent, which is characterized in that including rack body and leading silk；
Restraining position ring block is set on the rack body；
Limiting section is provided on the leading silk；
The leading silk can pass through the spacing ring, and the limiting section cannot pass through the spacing ring.
2. stent according to claim 1, which is characterized in that the limiting section is in sphere or cylinder, and the master
The center line of seal wire passes through the centre of sphere of the sphere or the axis of the cylinder；
The diameter of the sphere is more than the internal diameter of the spacing ring, alternatively, the diameter of the cylinder is more than the spacing ring
Internal diameter.
3. stent according to claim 1, which is characterized in that the spacing ring and the rack body are integrally formed.
4. stent according to claim 1, which is characterized in that the internal diameter of the spacing ring is 0.3mm-0.5mm.
5. stent according to claim 1, which is characterized in that the rack body is metal net shaped pipe.
6. stent according to claim 5, which is characterized in that the material of the rack body is 316L stainless steels, nickel closes
Gold or tantalum alloy.
7. stent according to claim 5, which is characterized in that the center of the axis of the rack body and the spacing ring
Angle between line is 0 ° -90 °.
8. stent according to claim 5, which is characterized in that along the axis direction of the rack body, the stent master
Body includes corresponding first end and second end；
The spacing ring is located at the first end or the second end；Alternatively, the spacing ring is located at the rack body
Between the first end and the second end.
9. according to claim 1-8 any one of them stents, which is characterized in that further include medication coat；
The medication coat is coated on the outer surface of the rack body；
The medication coat contains anti-restenosis drug ingredient.
10. a kind of stent system, which is characterized in that including branch's seal wire and such as claim 1-9 any one of them stents.
Priority Applications (1)
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