CN109199658A - A kind of self-inflated intraluminal stent and preparation method thereof - Google Patents
A kind of self-inflated intraluminal stent and preparation method thereof Download PDFInfo
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- CN109199658A CN109199658A CN201810705885.3A CN201810705885A CN109199658A CN 109199658 A CN109199658 A CN 109199658A CN 201810705885 A CN201810705885 A CN 201810705885A CN 109199658 A CN109199658 A CN 109199658A
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000000463 material Substances 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000010719 annulation reaction Methods 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000005452 bending Methods 0.000 description 11
- 230000001225 therapeutic effect Effects 0.000 description 10
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 3
- 238000009954 braiding Methods 0.000 description 3
- 230000003902 lesion Effects 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 244000141353 Prunus domestica Species 0.000 description 1
- 210000003445 biliary tract Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 nickel-titanium metals Chemical class 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
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- 210000003708 urethra Anatomy 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000009941 weaving Methods 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
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2/06—Blood vessels
- A61F2/07—Stent-grafts
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pulmonology (AREA)
- Gastroenterology & Hepatology (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The present invention provides a kind of self-inflated intraluminal stents and preparation method thereof, the bracket includes: two or more rings (1), one or more connecting rod (2) and more than one first connecting sleeve (3), at least two rings (1) connect with the both ends of connecting rod (2) respectively, connecting rod (2) at least one end and ring (1) is socketed with the first connecting sleeve (3), forms bracket.So that the bracket can not only be compressed in lesser delivery sheath, also there is superior flexibility and fatigue performance, guarantee that bracket can will not be broken in being compressed to tiny sheath, also guarantee that bracket is steady in a long-term in body lumen.
Description
Technical field
The present invention relates to a kind of the field of medical instrument technology for being used to support or repairing body lumen more particularly to a kind of pipes
It is intracavitary to intervene the self-inflated intraluminal stent and preparation method thereof used.
Background technique
Human body has a big and small lumen, such as blood vessel, tracheae, esophagus, biliary tract, enteron aisle, urethra etc., diameter from several millimeters to
Tens millimeters are differed.When lesion occur in these human body natural's lumens, as narrow, when run-down or warty expands, it was usually taken in the past
The treatment method of surgery is treated.But not only wound is big for the method for surgery, but also it is long to restore the period.More and more human bodies
Lumen disease can be prevented and/or be treated by the method that minimally invasive intervention uses.
For example, intraluminal stent implantation expansion strut Stenosis or overlay film frame implantation lumen tumor and run-down position into
Row repairing, so that body lumen restores unobstructed pipeline.Usually bracket is fitted into tiny delivery sheath, is sent to along lumen access
The diseased region of body lumen, then give to exit in sheath and discharge in lumen again.This treatment usually requires that: 1) bracket should be able to the greatest extent can
Being compressed in lesser sheath for energy, to reduce damage of the transmission process to lumen, reduces the difficulty of conveying；2) bracket should have
Compared with fatigue performance；3) bracket should have preferable flexibility.
Intraluminal stent is mainly made by the way of laser cutting and braiding at present.Laser cut stent such as patent
Self-expandable stent made of novel laser cut Nitin compo pipe described in CN103784222B.The stent strut is by along branch
The hurricane band composition that frame axially and longitudinally continuously detours.After bracket is cut by laser according to the decorative pattern of design, pass through heat treatment
Expansion is formed, although can improve the flexibility of bracket by the design of various decorative patterns, improves the fatigue durability of bracket
Can, but the bracket of this laser cutting it is intrinsic flexibility it is bad, be easy to happen stent fatigue fracture, should not be used in more curved
Body lumen position bent and with certain activity.Another intraluminal stent is braided support, such as patent
CN103598929B description it is a kind of using titanium-nickel wire according to wavy annular object made of sinusoidal, this effective solution
The flexibility problem of bracket, if but the radius of curvature of waveform is too small, bracket fracture is easy to happen, if the curvature of waveform half
Diameter is too big, and bracket can not be compressed in tiny sheath.Therefore, at present delivery sheath used in the type bracket generally than swash
Wanting for light cutting support is big.A kind of winding-type braided support as described in patent CN102973341B, the bracket are similarly only capable of
Overcome the problems, such as flexibility.Since the titanium-nickel wire of winding cannot be excessive, it is only capable of making using thinner titanium-nickel wire, therefore bracket
Support force it is smaller, be only capable of using in lumen.And the braided support of patent application CN105769383A description uses simultaneously
Waveform braiding and winding braiding shuffling, further improve the support performance of bracket.But the titanium-nickel wire bending for weaving process is made
At bracket fracture resistance can be low and big delivery sheath performance be not effectively improved.
Generally acknowledge that ideal intraluminal stent should have following characteristics at present: 1. can be compressed in lesser delivery sheath；2. having
Preferable flexibility；3. there is higher fatigue performance.Therefore the purpose of the present invention is develop a kind of novel bracket and its system
Make method, three above feature is met simultaneously with this.
Summary of the invention
In view of the defect of the prior art, the purpose of the present invention is developing a kind of novel bracket and preparation method thereof, so that
The bracket can not only be compressed in lesser delivery sheath, also have superior flexibility and fatigue performance, guarantee bracket energy
It will not be broken in being compressed to tiny sheath, also guarantee that bracket is steady in a long-term in body lumen.
To achieve the goals above, a kind of the first technical solution of the invention are as follows: self-inflated intraluminal stent, comprising: two
Above ring (1), one or more connecting rod (2) and more than one first connecting sleeve (3), at least two rings
(1) it is connected respectively with the both ends of connecting rod (2), connecting rod (2) at least one end and ring (1) is covered with the first connecting sleeve (3)
It connects, forms bracket.
It is socketed, can be made using one or more connecting rod (2) and connecting sleeve (3) between ring (1) of the invention
It is not easy to be broken off when bracket is bent, adapts to the body lumen of various forms, significantly improve clinical therapeutic efficacy, while both
It tangles between support rod when can make to connect more firm and avoidable bracket disengaging sheath between ring.
It is preferred that the ring (1) is made of more support rods (4), respective one end of two support rods (4) at least within
It is socketed to form with the second connecting sleeve (5).
Wherein, the first connecting sleeve (3) and the second connecting sleeve (5) can be same or different connecting sleeve.
Limitation of the ring (1) of bracket of the present invention due to the not no curvature of the bending part of braided support, ring (1)
Two support rods (4) can be compressed very well, and fit together, compressed diameter effectively reduced, so that bracket
It can be compressed into lesser delivery sheath without being broken, while these support rods made by used connecting method
(4) deformation of caused support rod is much smaller compared with the deformation of braided support bending part when being bonded, therefore which has well
Compression performance and fatigue performance.
This bracket is preferably to be spliced with titanium-nickel wire, so that the bracket inherits the submissive performance of braided support, is kept away
The disadvantage of cutting support flexibility difference is exempted from.
The connecting rod (2) and support rod (4) is preferably respectively circular cylindrical shape, connecting rod (2) and support rod (4) it is each
Some materials are removed from both ends opposite side, is formed cylindric after two support rod (4) ends and connecting rod (2) end set, is inserted in
In first connecting sleeve (3).It is preferred that two support rods (4) being connect with connecting rod (2) and connection boom end opposite side difference
Some materials are removed centered on 120 ° of sectors.
The respective both ends of connecting rod (2) and support rod (4) are spliced into cylindric by being inserted in casing connection, entire mistake together
Journey is simple and convenient, strong operability, at the same by welding make to connect it is stronger.
In addition, not formed afterwards side by side with other two support rod (4) ends of connecting rod (2) connection cylindric, it is inserted in the
In two connecting sleeves (5).It is preferred that being fixedly connected by welding etc..It is preferred that a plurality of support rod (4) passes sequentially through casing (5) even from beginning to end
It connects to form annulation (1).It is preferred that described other two support rod (4) end opposite sides not connected with connecting rod (2) are respectively with half
Some materials are removed centered on circle.
The wave crest and trough of this ring waveform, will not be as prior art by a nickel-titanium metals by casing connection
Silk is bent to form waveform, and thus Wave crest and wave trough will receive bending curvature limitation, even if carrying out bent angle respectively at Wave crest and wave trough
Kind processing, such as formed it is arc-shaped, bracket compression enter sheath when also inevitably fracture.The present invention splices branch by casing
Strut forms Wave crest and wave trough, and there is no bending limitations, can effectively solve the above problems.
It is preferred that support rod (4) both ends opposite side with connecting rod (2) connection does not remove some materials centered on semicircle, in this way
Two support rod (4) ends side by side after, the stress after casing connection is more uniform, and fastness is more preferable；And even with connecting rod (2)
Support rod (4) the both ends opposite side connect removes some materials centered on 120 ° of sectors；Such two support rods (4) end and connection
Bar (2) end side by side after, the stress after casing connection is more uniform, and fastness is more preferable.
Wherein, when preferably support rod (4), connecting rod (2) remove some materials, it can vertically remove, be also possible to along cylinder
In the removal of certain radian, optimal radian is that 3-15 degree (prunes the angle of plane (408) and cylinder axle center, when being two
When bar splices, as the variation of cutting radian is that 165-177 degree and 183-195 degree cooperate, and when three bars or four bars are spliced, is pressed
It is adjusted according to aforementioned angular).
By aforementioned schemes, the connection end (401) of support rod of the invention (4), (402) respectively with coupling part
(403) face can shape at an angle, angle is 15-90 degree, and two support rod (4) ends certifiable in this way are spliced into cylinder
Shape, this is consistent with coupling part (403) cylindrical shape, it is easier to which splicing is stronger to make to support boom end connection.
Ring (1) of the invention is made of 8-32 root support rod (4), forms 4-16 wave.Rod is supported by 8-32 root
At ring waveform bracket be adapted to the lumen of all size, while ensure that the good support of bracket from geometry angle
Power.Number, diameter, the shape of ring (1) can make the appropriate adjustments according to the length and structure of lumen lesion.
Support rod (4) diameter of the invention is 0.1-1.2 millimeters, and length is preferably 4-40 millimeters.
The wave crest, trough angle of ring (1) waveform that the present invention is formed by more support rods (4) are respectively 10-120
Degree.
Above-mentioned design can be too small or excessive to avoid the radius of curvature of waveform, make bracket it is more compressible enter sheath without
Bending fracture occurs, while ensuring that conveying device caliber used can be reduced to 9F or so, reduces damage of the transmission process to lumen,
Reduce the difficulty of conveying, the setting of above-mentioned support shank diameter and the setting of waveform angle and height can make the big blood vessel of stenter to implant it
There is good support force afterwards, significantly improve clinical therapeutic efficacy.Above-mentioned bracket is preferably applied to arteries, especially actively
Arteries and veins and aortic branch.
Another object of the present invention is to provide a kind of production methods of aforementioned self-inflated intraluminal stent, specifically include: branch
Strut (4) is socketed with casing (5).It is fixedly connected after socket, the hot welds such as laser welding, argon arc welding, electric resistance welding can be used
Mode.Stamping connection can also be used.
After connecting between the ring (1) at composition bracket both ends of the present invention by end connecting rod (6), spiral shell can be formed
Spin line shape or linear.
It is preferred that the end connecting rod (6) is socketed by the way of aforementioned connecting rod (2).
The self-inflated intraluminal stent further includes film (7), is made into overlay film frame, can part or complete on bracket of the invention
Portion is covered with film, and the film can be PET or ePTFE membrane.On preferred film therapeutic effect can be improved with drug.
Compared with prior art, the present invention has the advantage that
Self-inflated intraluminal stent of the invention can be compressed in lesser delivery sheath, and sheath pipe diameter can be reduced to the left side 9F
Therefore the right side, bracket of the invention can reduce damage of the transmission process to lumen, reduce the difficulty of conveying.
Self-inflated intraluminal stent of the invention has superior flexibility and fatigue performance, guarantees that bracket can be compressed to carefully
It will not be broken in small sheath.
Self-inflated intraluminal stent of the invention has excellent support force, adapts to the lumen in various forms, guarantees
Bracket is steady in a long-term in body lumen.
Self-inflated intraluminal stent surface covering PET of the invention or ePTFE membrane, have better therapeutic effect.
It is connected firmly between self-inflated intraluminal stent support rod of the invention, production method is simple, saves cost.
Detailed description of the invention:
A kind of self-inflated intraluminal stent overall structure figure of Fig. 1 present invention
A kind of self-inflated intraluminal stent ring composite structural diagram of Fig. 2 present invention
A kind of self-inflated intraluminal stent support rod connection schematic diagram of Fig. 3 present invention
A kind of self-inflated intraluminal stent support rod of Fig. 4 present invention splices position partial enlarged view
Structure chart after a kind of self-inflated intraluminal stent wrap film of Fig. 5 present invention
Wherein, ring (1), connecting rod (2), the first connecting sleeve (3), support rod (4), the second connecting sleeve (5), end
Portion's connecting rod (6).
Specific embodiment:
Invention is further described in detail with attached drawing combined with specific embodiments below, but the contents of the present invention not office
It is limited to embodiment.
Embodiment 1
As shown in Figure 1, a kind of self-inflated intraluminal stent of the present embodiment, is spliced using titanium-nickel wire, thus the bracket after
The submissive performance for having held braided support avoids the disadvantage of cutting support flexibility difference.
The bracket includes: that two or more rings (1), one or more connecting rod (2) and more than one first connect
Female connector pipe (3), at least two rings (1) are connected with the both ends of connecting rod (2) respectively, connecting rod (2) at least one end and ring-type
Object (1) is socketed with the first connecting sleeve (3), forms bracket.
A kind of new self-inflated intraluminal stent implementation is provided, connecting rod and bracket during pressure is held are greatly reduced
Wave crest, trough the yield force through bearing.
Embodiment 2
As shown in Figure 1, a kind of self-inflated intraluminal stent of the present embodiment, is spliced using titanium-nickel wire, thus the bracket after
The submissive performance for having held braided support avoids the disadvantage of cutting support flexibility difference.
The bracket includes: that two or more rings (1), one or more connecting rod (2) and more than one first connect
Female connector pipe (3), at least two rings (1) are connected with the both ends of connecting rod (2) respectively, connecting rod (2) at least one end and ring-type
Object (1) is socketed with the first connecting sleeve (3), forms bracket.
Wherein ring (1) is made of more support rods (4), and respective one end of two support rods (4) is at least within
Two connecting sleeves (5) are socketed to form.First connecting sleeve (3) and the second connecting sleeve (5) can be same or different company
Female connector pipe.Here the quantity of ring (1) is depending on actual clinical needs in bracket, and the number of support rod (4) used is according to controlling
Depending on treatment position space size and bracket overall structure stability.
It is socketed, can be made using one or more connecting rod (2) and connecting sleeve (3) between ring (1) of the invention
It is not easy to be broken off when bracket is bent, adapts to the body lumen of various forms, significantly improve clinical therapeutic efficacy, while both
It tangles between support rod when can make to connect more firm and avoidable bracket disengaging sheath between ring.Such bracket and
For ring (1) due to the limitation of the not no curvature of the bending part of braided support, two support rods (4) of ring (1) can be with
It is compressed, and is fit together very well, effectively reduce compressed diameter, so that bracket can be compressed to lesser conveying
Without being broken in sheath, simultaneously because caused support rod when being bonded these support rods (4) using connecting method
Deformation it is much smaller compared with the deformation of braided support bending part, therefore which has good compression performance and fatigue durability
Energy.
Embodiment 3
As depicted in figs. 1 and 2, a kind of self-inflated intraluminal stent of the present embodiment, is spliced using titanium-nickel wire, thus the branch
Frame inherits the submissive performance of braided support, avoids the disadvantage of cutting support flexibility difference.
The bracket includes: that two or more rings (1), one or more connecting rod (2) and more than one first connect
Female connector pipe (3), at least two rings (1) are connected with the both ends of connecting rod (2) respectively, connecting rod (2) at least one end and ring-type
Object (1) is socketed with the first connecting sleeve (3), forms bracket.Further as shown in Fig. 2, ring (1) is by more support rods (4)
Spliced by the second connecting sleeve (5) and is formed.
Here connecting rod (2) and support rod (4) preferably circular column, the respective both ends of connecting rod (2) and support rod (4)
Opposite side removes some materials, is formed cylindric after two support rod (4) ends and connecting rod (2) end set, is inserted in the first company
In female connector pipe (3), it is fixedly connected by welding etc..Three stitching sections are spliced into together cylindric is inserted in casing connection, entire mistake
Journey is simple and convenient, strong operability, at the same by welding make to connect it is stronger.
Other two support rod (4) ends with connecting rod (2) connection do not form cylindric afterwards side by side, are inserted in the second connection
In casing (5), it is fixedly connected by welding etc..It is preferred that support rod (4) passes sequentially through casing (5) connection from beginning to end forms annulation
(1).The wave crest and trough of this ring waveform, will not be curved by a nickel-titanium metal silk as prior art by casing connection
Folding forms waveform, and thus Wave crest and wave trough will receive bending curvature limitation, even if bent angle is carried out various places at Wave crest and wave trough
Reason, for example, formed it is arc-shaped etc., bracket compression enter sheath when also inevitably fracture, the present invention by casing splicing support
Bar forms waveform, and there is no bending limitations, can effectively solve the above problems.
Embodiment 4
On the basis of embodiment 1, embodiment 2 or embodiment 3, not with connecting rod (2) connection support rod (4) both ends pair
Side removes some materials centered on semicircle, such two support rods (4) end side by side after, the stress after casing connection is more
Uniformly, fastness is more preferable；And part is removed centered on 120 ° of sectors with support rod (4) both ends opposite side of connecting rod (2) connection
Material；Such two support rods (4) end and connecting rod (2) end side by side after, the stress after casing connection is more uniform, jail
Solidity is more preferable.
Wherein, as shown in figure 4, it is preferred that can vertically remove, be also possible in certain radian along cylinder when removal some materials
Removal, optimal radian be 3-15 degree.
As shown in figure 3, the face of the end (401), (402) of support rod (4) of the invention respectively with coupling part (403) can
At an angle, angle is 15-90 degree to shape, and two support rod (4) ends certifiable in this way are spliced into cylindric, this and interconnecting piece
Divide (403) cylindrical shape consistent, it is easier to which splicing is stronger to make to support boom end connection.
Embodiment 5
On the basis of embodiment 1, embodiment 2, embodiment 3 or embodiment 4, the ring (1) of the present embodiment chooses 8-
32 support rod (4) compositions, form 4-16 wave.It is adapted to by the ring waveform bracket that 8-32 root support rod is formed various big
Small lumen, while ensure that the good support force of bracket from geometry angle.The number of ring (1), diameter, shape can be with
It is made the appropriate adjustments according to the length of lumen lesion and structure.The diameter of the present embodiment support rod (4) is 0.1-1.2 millimeters simultaneously,
The Wave crest and wave trough angle of ring (1) waveform that support rod (4) is formed is 10-120 degree, what support rod (4) was formed
The peaks and troughs difference in height of ring (1) waveform is 4-40 millimeters, remaining is the same as embodiment 3.It in this way can be to avoid the song of waveform
Rate radius is too small or excessive, makes the more compressible sheath that enters of bracket without bending fracture occurs, while ensuring conveying dress used
9F or so can be reduced to by setting caliber, reduced damage of the transmission process to lumen, reduced the difficulty of conveying, above-mentioned support shank diameter
Setting and the setting of waveform angle and height can make have good support force after the big blood vessel of stenter to implant, significantly improve clinic
Therapeutic effect.
Embodiment 6
On the basis of embodiment 5, ring (1) passes sequentially through the second connecting sleeve (5) by 8-32 root support rod (4) from beginning to end
Be spliced waveform, and the body lumen of different shape size is suitable for using the ring that this quantity support rod is formed, and is formed
The wave that 4-16 Wave crest and wave trough angle is 90 degree, the difference in height of Wave crest and wave trough are 25 millimeters, and Wave crest and wave trough angle can at right angles make
Bracket has a better support force, and limiting Wave crest and wave trough difference in height can make bracket integrally obtain more robust structure, at the same also because
This defines ring quantity, prevents ring quantity from influencing therapeutic effect very little, and quantity is unfavorable for saving cost of manufacture too much.
Support rod (4) generally circular in cross section column, diameter are 0.5 millimeter, avoid support rod (4) because bracket is carefully caused very much to overally support power
Decline.
Embodiment 7
The present embodiment provides a kind of production methods of aforementioned self-inflated intraluminal stent, specifically include: connecting rod or support rod
It is socketed with casing.
Further fixed form includes: that laser welding can be used, argon arc welding, the hot welds mode such as electric resistance welding.It can also adopt
Use stamping connection.Remaining is same as Example 4.This with the prior art using mechanical means stationary phase than stronger, greatly improve
Bracket service life.
Embodiment 8
As shown in figure 5, a kind of self-inflated intraluminal stent of the present embodiment, one can be used between the ring (1) at bracket both ends
Root or the connection of more radicle connecting rods (6) and the first connecting sleeve (3) can not only make to connect between ring so more firm but also can
It tangles between support rod when bracket being avoided to pass in and out sheath, while the connection ring of the present embodiment can after connecting rod connects
Form spiral yarn shaped or linear bracket.
Connecting rod radical and form setting through this embodiment, make bracket integrally obtain firm performance, are beneficial to face
Bed therapeutic effect.
Embodiment 9
As shown in figure 5, a kind of self-inflated intraluminal stent of the present embodiment further includes film (7), overlay film frame can be made.
It can partly or entirely be covered with plastic film on bracket of the invention, the film can be PET or ePTFE membrane,
On film therapeutic effect can be improved with drug.
Possessed beneficial effect includes: the present invention compared with the existing technology
Self-inflated intraluminal stent of the invention can be compressed in lesser delivery sheath, and sheath pipe diameter can be reduced to the left side 9F
Therefore the right side, bracket of the invention can reduce damage of the transmission process to lumen, reduce the difficulty of conveying.
Self-inflated intraluminal stent of the invention has superior flexibility and fatigue performance, guarantees that bracket can be compressed to
It will not be broken in tiny sheath.
Self-inflated intraluminal stent of the invention has excellent support force, adapts to the lumen in various forms, guarantees
Bracket is steady in a long-term in body lumen.
Self-inflated intraluminal stent surface covering PET of the invention or ePTFE membrane, have better therapeutic effect.
It is connected firmly between self-inflated intraluminal stent support rod of the invention, production method is simple, saves cost.
Above-described embodiment 1~9 is embodiments of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (12)
1. a kind of self-inflated intraluminal stent characterized by comprising two or more rings (1), one or more connecting rod
(2) it is connected respectively with the both ends of connecting rod (2) with more than one first connecting sleeve (3), at least two rings (1), even
Extension bar (2) at least one end and ring (1) is socketed with the first connecting sleeve (3), forms bracket.
2. a kind of self-inflated intraluminal stent according to claim 1, which is characterized in that the ring (1) is by more branch
Strut (4) composition, respective one end of two support rods (4) is socketed to form with the second connecting sleeve (5) at least within.
3. a kind of self-inflated intraluminal stent according to claim 2, which is characterized in that the first connecting sleeve (3) and second
Connecting sleeve (5) can be same or different connecting sleeve.
4. a kind of self-inflated intraluminal stent described in any claim according to claim 1-3, which is characterized in that the company
Extension bar (2) and support rod (4) are respectively circular cylindrical shape, the respective both ends opposite side removal part material of connecting rod (2) and support rod (4)
It is formed cylindric after material, two support rod (4) ends and connecting rod (2) end set, is inserted in the first connecting sleeve (3).It is excellent
Choosing two support rods (4) connecting with connecting rod (2) and connection boom end opposite side are removed centered on 120 ° of sectors respectively
Some materials.
5. a kind of self-inflated intraluminal stent described in any claim according to claim 1-4, which is characterized in that the branch
Strut (4) is circular cylindrical shape, and the respective both ends opposite side of support rod (4) removes some materials, it is described not with connecting rod (2) connection
Other two support rod (4) ends form cylindric afterwards side by side, are inserted in the second connecting sleeve (5)；A plurality of support rod (4) head and the tail
It passes sequentially through the second connecting sleeve (5) connection and forms annulation (1).It is preferred that not other two with connecting rod (2) connection
Support rod (4) end opposite side removes some materials centered on semicircle respectively.
6. a kind of self-inflated intraluminal stent according to claim 4-5 any claim, which is characterized in that described to go
It when except support rod (4), connecting rod (2) both ends some materials, can vertically be removed along cylinder, be also possible to go in certain radian
It removes, radian is 3-15 degree.
7. a kind of self-inflated intraluminal stent according to claim 2-6 any claim, which is characterized in that the branch
The end (401) of strut (4), (402) respectively with the face of coupling part (403) can shape at an angle, angle is 15-90 degree.
8. a kind of self-inflated intraluminal stent according to claim 2-7 any claim, which is characterized in that the ring
Shape object (1) is made of 8-32 root support rod (4), forms 4-16 wave；Support rod (4) diameter is 0.1-1.2 millimeters, length
It is 4-40 millimeters；The wave crest, trough angle of described ring (1) waveform formed by more support rods (4) are respectively 10-120
Degree.
9. a kind of self-inflated intraluminal stent described in any claim according to claim 1-8, which is characterized in that the set
It is fixedly connected after pipe socket, the hot welds mode such as laser welding, argon arc welding, electric resistance welding can be used and connect, punching can also be used
Pressure mode connects.
10. a kind of self-inflated intraluminal stent described in any claim according to claim 1-9, which is characterized in that described group
After passing through end connecting rod (6) connection between the ring (1) at bracket both ends, spiral yarn shaped or linear can be formed.
11. a kind of self-inflated intraluminal stent described in any claim according to claim 1-10, which is characterized in that also wrap
It includes film (7), can partly or entirely be covered with film on intraluminal stent.The film can be PET or ePTFE membrane.It is preferred that thin
Can have drug on film.
12. a kind of production method of self-inflated intraluminal stent described in claim 1-11 any claim, which is characterized in that
It include: that connecting rod or support rod are socketed with casing.
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|---|---|---|---|
| CN201710532632 | 2017-07-03 | ||
| CN2017105326326 | 2017-07-03 |
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| CN109199658A true CN109199658A (en) | 2019-01-15 |
| CN109199658B CN109199658B (en) | 2024-03-29 |
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| CN201810705885.3A Active CN109199658B (en) | 2017-07-03 | 2018-07-02 | Self-expanding type lumen stent and manufacturing method thereof |
| CN201821029839.8U Active CN209107691U (en) | 2017-07-03 | 2018-07-02 | A kind of self-inflated intraluminal stent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112972083A (en) * | 2019-12-17 | 2021-06-18 | 北京迈迪顶峰医疗科技有限公司 | Pulmonary artery stent for children |
| CN116115286A (en) * | 2022-03-14 | 2023-05-16 | 杭州亿科医疗科技有限公司 | Vascular stent with good adherence |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109199658B (en) * | 2017-07-03 | 2024-03-29 | 深圳市科奕顿生物医疗科技有限公司 | Self-expanding type lumen stent and manufacturing method thereof |
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Also Published As
| Publication number | Publication date |
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| CN209107691U (en) | 2019-07-16 |
| CN109199658B (en) | 2024-03-29 |
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