CN106726039B - A kind of open self-expanding stent of spiral - Google Patents
A kind of open self-expanding stent of spiral Download PDFInfo
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- CN106726039B CN106726039B CN201710078202.1A CN201710078202A CN106726039B CN 106726039 B CN106726039 B CN 106726039B CN 201710078202 A CN201710078202 A CN 201710078202A CN 106726039 B CN106726039 B CN 106726039B
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- 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
- A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
-
- 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
- A61F2/91—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
- A61F2/915—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 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
- A61F2002/9155—Adjacent bands being connected to each other
- A61F2002/91575—Adjacent bands being connected to each other connected peak to trough
-
- 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
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0061—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof swellable
-
- 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
-
- 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
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Optics & Photonics (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Physics & Mathematics (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
A kind of open self-expanding stent of spiral, including main body, the transition region at the both ends for being connected to the main body and the end region for being connected to the transition region, the main body includes spiral-distributed first zig-zag coiling, is connected between the first zig-zag coiling by the first connecting bridge；The end region includes the second zig-zag coiling, it is connected between the end region and the transition region by the second connecting bridge, the main body, the transition region, the end region surround tubular structure jointly, and the self-expanding stent has the collapsed diameter for being placed in blood vessel and the swell diameter for supporting expansion in the blood vessel.The present invention is rational in infrastructure, easy to use, has high-flexibility, high radial and axial strength, and using effect is well lasting.
Description
Technical field
The present invention relates to implantable medical fixture technology field, specifically a kind of open self-expanding stent of spiral.
Background technology
Medical rack can be placed in the vessel segment of lesion, for supporting, unimpeded vascular wall, be usually used in angioplasty so as to
Repair and reconstruction blood vessel.Stent is placed in impaired artery segment can prevent elastical retraction and arterial occlusion, prevented also from artery
Along the partial cut of middle layer.Theoretical upper bracket can be used in any Human Physiology tube chamber, and such as artery, bile duct, is secreted vein
Urethra, alimentary canal, tracheobronchial tree, aqueductus cerebri or urogenital system inner cavity, naturally it is also possible to be placed in animal
Intracavitary.
In general, dividing in the way of being unfolded in the blood vessels, there are two types of the stents of type：Self-expanding stent and balloon expandable
Type stent.One unexpanded stent is actually inserted into endovascular affected area by balloon-expandable stent, by the inside of stent
A balloon is placed, and stent expansion is made to balloon inflation, inflation process has remolded atheromatous plaque and fixed stent
It is intravascular what is be damaged.Balloon-expandable stent the problem is that, over time, if stent lack expansion bullet
Property, the internal diameter of stent tapers into, finally since the natural elasticity of blood vessel is shunk back and is collapsed.
On the contrary, self-expanding stent can self-expansion sizing, it includes there are many different designs：Spiral shape, circle, circle
Cylindricality, web-like, ladder cast, high-order coil-shaped, Weaving type or grid type etc..Self-expanding stent is remembered by superelastic metal or shape
Recall metal composition（For example, see the U.S. Patent No. 6,013,854 for authorizing Moriuchi）, by by the stent under compressive state
It is inserted into impaired narrow vessel segment, once compressing force is eliminated, stent self inflation and the inner cavity full of blood vessel.Outer diameter ratio by
The pipe that the internal diameter of the angiosomes of damage is small can be used for compressed stent, when restriction state of the stent out of pipe is released, branch
Frame expands and restores original shape, so as to tight against vascular wall and be securely seated between in blood vessel.
The various designs of self-expanding stent at present also have certain functional defect.For example, with simple cylindrical formation
Stent be not easy to be compressed, cause to be difficult to by stent safety it is suitable be inserted into the damaged part of blood vessel.Overcome the problems, such as showing for this
A kind of method for having the support Design in technology is to provide a kind of stent formed by zigzag elements, such as authorizes
Described in the U.S. Patent No. 5,562,697 of Christiansen.The stent formed by chevron pattern has in axial side
Upward flexibility, so as to stent conveying and can with the deformation of blood vessel corresponding crust deformation, however, such stent
Usually lack enough radial strengths to maintain the opening of the blood vessel after elasticity is shunk back.
In order to provide zigzag design increased radial strength, zigzag elements can be connect with connecting element.Authorize Kveen
Et al. U.S. Patent No. 6,042,597 disclose a kind of balloon expandable stent, it is by with the continuous of undulating shape
What screw element was formed, and the undulating shape forms wave crest and trough, all wave crests of adjacent undulating shape pass through song
Thread elements connects.Connecting element between each adjacent wave shape part may weaken the flexibility of stent.
Another method is to provide the unit of many interconnections, these units assume diamond in shape or rhomboid, such as authorize
The U.S. Patent No. of Karteladze et al. 6,063,113 or No. 6,013,584 public affairs of U.S. Patent No. for authorizing Moriuchi
A kind of support Design opened, such stent have interlocking unit rigidly, thus such stent with than
Higher rigidity, it is impossible to be bent to conform to the variation of shape of blood vessel.
Because the end for forming the spiral coil of stent is uneven, the last part of coiling and other regions of stent
It expands at a different rate, this problem, that is, differential expansion can be by introducing transition region between the main body of stent and end region
It solves, such as the description in U.S. Patent No. 6,878, No. 162, the 6th, 969, No. 402 and the 7th, 169, No. 175 to transition region.
However this kind of transition plot structure still can the homogeneous compaction of stent and expansion, stent drug coat and its with contacts blood rate,
It is short of in terms of the functions such as the radial support intensity of stent, using effect is poor, is easily in the presence of blood vessel blockage again.
The present invention provides a kind of geometry designs for stent, it is made to have preferable flexibility, enough radial directions simultaneously
Intensity and axial strength, and using effect is preferable, and can keeping unobstructed blood vessel for a long time, this design of stent is also without failing
It is allowed to be inserted into complicated small-diameter intravascular, is dynamically responsive to the variation of blood pressure.
Invention content
The present invention technical purpose be to provide a kind of spiral open self-expanding stent, utilize stent made of the design
With preferable flexibility, high flexibility, high radial strength and high axial strength, and good unimpeded effect is played, it is long
Long effectively.
The specific technical solution of the present invention is as follows：A kind of open self-expanding stent of spiral, including main body, be connected to it is described
The transition region at the both ends of main body and the end region for being connected to the transition region, the main body include spiral-distributed first sawtooth
Waveform coiling is connected between the first zig-zag coiling by the first connecting bridge；The end region includes the second sawtooth
Waveform coiling is connected between the end region and the transition region by the second connecting bridge, the main body, the transition region,
The end region surrounds tubular structure jointly, the self-expanding stent have collapsed diameter for being placed in blood vessel and for
The swell diameter expanded is supported in blood vessel, the transition region includes the coiling of third zig-zag, the 4th zig-zag coiling and the 5th saw
Tooth waveform coiling, the 4th zig-zag coiling, the 5th zig-zag coiling are all connected to the third zig-zag
Coiling；It is connected between the third zig-zag coiling and the first zig-zag coiling by third connecting bridge, it is described
It is connected between 4th zig-zag coiling and the first zig-zag coiling by the 4th connecting bridge, the 4th sawtooth wave
It is connected between shape coiling and the 5th zig-zag coiling by the 5th connecting bridge.
Preferably, the first zig-zag coiling includes multiple first coiling units, the first coiling unit packet
It includes the first coiling connecting pole and is connected to first coiling and connects the first coiling linkage section of top end；Second sawtooth wave
Shape coiling includes multiple second coiling units, and second coiling unit includes the second coiling connecting pole and is connected to described second
Coiling connects the second coiling linkage section of top end；The third zig-zag coiling includes multiple third coiling units, described
Third coiling unit includes third coiling connecting pole and is connected to the third coiling and connects the third coiling linkage section of top end；
The 4th zig-zag coiling include multiple 4th coiling units, the 4th coiling unit include the 4th coiling connecting pole and
It is connected to the 4th coiling linkage section of the 4th coiling connection top end；The 5th zig-zag coiling includes multiple five
Coiling unit, the 5th coiling unit include the 5th coiling connecting pole and be connected to that the 5th coiling connects top end the
Five coiling linkage sections.
Preferably, the 5th coiling linkage section described in the first section/the 4th saw is opened in the 5th zig-zag coiling
The last section for opening the 4th coiling linkage section described in the first section and the third zig-zag coiling of tooth waveform coiling described the
Three coiling linkage sections are connected, and the 4th coiling connecting pole/described 5th described in the first section is opened in the 4th zig-zag coiling
The most end for opening a top of the 5th coiling connecting pole described in the first section and the third zig-zag coiling of zig-zag coiling
The one section third coiling connecting pole is connected by the 6th connecting bridge.
Preferably, the 4th coiling connecting pole described in the first section/the 5th saw is opened in the 4th zig-zag coiling
The last section for opening the 5th coiling connecting pole described in the first section and the third zig-zag coiling of tooth waveform coiling described the
There are deformation spatial transitions, the span of the deformation spatial transition between three coiling connecting poles to be limited by the 6th connecting bridge.
Preferably, one end of the 6th connecting bridge is connected to described in the last section of the third zig-zag coiling
The central region of third coiling connecting pole, the length of the central region account for the last section institute of the third zig-zag coiling
State the 1/3 of third coiling connection column length.
Preferably, first connecting bridge, the third connecting bridge, the 4th connecting bridge, the 5th connecting bridge
It is partial to the same side relative to scaffold inclination；It is the inclined direction of 6th connecting bridge and first connecting bridge, described
Third connecting bridge, the 4th connecting bridge, the inclined direction of the 5th connecting bridge are identical.
Preferably, the inclined degree of the 6th connecting bridge be respectively less than first connecting bridge, the third connecting bridge,
The inclined degree of 4th connecting bridge, the 5th connecting bridge.
Preferably, the toughness of the 6th connecting bridge is better than first connecting bridge, the third connecting bridge, described
The toughness of 4th connecting bridge, the 5th connecting bridge.
Preferably, the equal length of each first coiling connecting pole；The third coiling connecting pole, the described 4th
Coiling connecting pole, the 5th coiling connecting pole length from it is respective open the first section to the last section gradually increase.
Preferably, the length of the third connecting bridge gradually increases and has relative to the third coiling connecting pole same
The augment direction of sample.
Preferably, the length variation range of the third coiling connecting pole for the first coiling connecting pole 1.0 ~
1.5 again.
Preferably, the length variation range of the 4th coiling connecting pole for the first coiling connecting pole 0.5 ~
1.0 again.
Preferably, the length variation range of the 5th coiling connecting pole for the first coiling connecting pole 0.5 ~
1.0 again.
Belong to described in two of the first zig-zag coiling described in two groups preferably, first connecting bridge is connected to
Between first coiling linkage section；Second connecting bridge is connected to the second coiling linkage section and the third coiling linkage section
Between, between the second coiling linkage section and the 5th coiling linkage section；The third connecting bridge is connected to the third
Between coiling linkage section and the first coiling linkage section；4th connecting bridge is connected to the 4th coiling linkage section and institute
It states between the first coiling linkage section；5th connecting bridge is connected to the 4th coiling linkage section and is connect with the 5th coiling
Between section.
Preferably, one is connected with every two the first coiling linkage sections described in every group in the first zig-zag coiling
First connecting bridge.
Preferably, there are two the second coiling linkage section and two at interval between two neighboring second connecting bridge
The third coiling linkage section or two the 5th coiling linkage sections or a third coiling linkage section and one the described 5th
Coiling linkage section.
Preferably, there are two the third coiling linkage section and two first at interval between the adjacent third connecting bridge
Coiling linkage section.
Preferably, there are two described in the 4th coiling linkage section and two at interval between adjacent 4th connecting bridge
First coiling linkage section.
Some existing similar Medical racks, mostly still using relatively simple, primary structure design, for transition
The structure design of this key area of area fails have effective improvement and larger breakthrough, generally all uses one group of single sawtooth
Waveform coiling, the strut lengths opposite brackets long axis of the zig-zag coiling gradually increase to be adapted to transition clockwise or counterclockwise
The space in area, this transition area scheme can cause the zig-zag coiling whole because the circle circumferential span in transition region is excessive, knot
Structure is excessively intensive, and the problem of not compressible, decrement is not up to standard occurs, while radial strength existing defects itself, to blood vessel
Supporting role accordingly weaken, and with circle circumferential span gradually increase, the longitudinal size of the zig-zag coiling must increase therewith
Greatly, overall structure stability is poor, intensity aspect effect gives a discount, it is controlled to be not easy, and support force is further weakened, in the use of patient
Effect is often unsatisfactory；
There are also existing stents to improve transition region again, and original single zig-zag coiling is replaced with by two groups of saws
The form that the coiling of tooth waveform is connected with bridge joint column, bridge joint column increase to be adapted to clockwise or counterclockwise relative to scaffold
The space in area is crossed, bridge joint column can match to form closure framework with zig-zag coiling, and the structure of this transition region causes entirety
Space structure and enabling capabilities have higher stability and a structural strength, but same transition region there is circumference to
A series of larger closure frameworks of span, forming the length for the bridge joint column for being closed one of framework can become very big, be not only to bridge
In itself, being closed the intensity of framework can also weaken column together instead, cause overall structure unstable, support hypodynamic problem.It is real
Using in process, the using effect of such improved support does not also have greatly improved, and is susceptible to vessel retraction and blood on border
The problem of blockage.Applicant analyzed reason, this is because human body can be to being considered as that the stent progress of alien material " is attacked
Hit ", the position that stent and artery film are contacted is as impingement, so as to be repaired automatically to it, then at the stent of artery
It just will appear inflammatory reaction, will appear scar tissue hyperplasia in branch frame peripheral, it can be with when this scar tissue hyperplasia is serious
The artery for having caused unimpeded is again narrow or even blocks.In order to solve the problems, such as that this can take the coated medicament coating on stent
Method, and because the closing support frame will appear hollow face upon inflation, it is blind to will appear excessive and excessive contact
Area, drug coat amount are greatly decreased, and using effect is poor, service life is short.
The present invention will be further devised on the basis of conventional stent designs by the third zig-zag coiling, institute
State the 4th zig-zag coiling, the 5th zig-zag coiling combines the transition region of composition, and with following significantly technology effect
Fruit：
1st, the overall structure composition of the stent is axial curved plus good material selection and processing technology in actual production
Bent and telescopicing performance is good, and radial support power is strong so that the compliance of the stent is preferable, and its high radial and height are axial strong
Degree can also be guaranteed, close structure, expand uniformity；
2nd, the 4th zig-zag coiling and the 5th zig-zag coiling it is combined into structure design enable to it swollen
Spatial shape after swollen is more stable, further improves radial support power and axial stretching ability；
3rd, the structure of the 4th zig-zag coiling and the 5th zig-zag coiling and the third zig-zag
The structure of coiling mutually assists adjusting respective circumference to span scope so that the intensity of both structures of transition region is maintained at
Preferred values, the circumference of itself also can adjust to span scope in preferable Effect value, while can take into account again and help to increase that drug applies
The amount of application of layer improves anti-rejection effect, plays good and lasting effective utilization；
4th, between the 4th zig-zag coiling, the 5th zig-zag coiling and the third zig-zag coiling
Connection structure so that the expansion uniformity of transition region is effectively ensured with compliance, particularly described 6th connecting bridge and
The deformation spatial transition when transition region is expanded, gently can effectively bear the effect of simultaneously conductance so that entire
The expansion action consistency of transition region is good, and the 6th connecting bridge and the deformation spatial transition in this position namely
The junction of the third zig-zag coiling and the 4th zig-zag coiling, the 5th zig-zag coiling is set,
The smooth slowly transition of the stress of this aforementioned two kinds of structure least can easily be made transition region recurring structure in expansion
Fracture is distorted, and when branch is placed on intravascular, having by the 6th connecting bridge and the deformation spatial transition can
With the deformation surplus that vessel size adjusts, the adaptability of entire stent is excellent.
The technological merit of the present invention is that the open self-expanding stent of the spiral is rational in infrastructure, easy to use, entire to prop up
Frame has preferable compliance, high axial strength and high radial strength, can there is enough axial force and radial load in the blood vessel
Make stent in time, it is complete, equably expand, it is uniform and stable for the support of vascular wall, during push and release both ends by
Power is uniform, and sizing is good, preferable to the application adaptability in different blood vessel, and has good lasting lead in use
Smooth ability, greatly improves using effect, prolongs the service life.
Description of the drawings
Fig. 1 is the structure diagram of the embodiment of the present invention；
Fig. 2 is the partial structural diagram of the embodiment of the present invention；
Fig. 3 is the structure diagram being flared outside band of the embodiment of the present invention；
Corresponding each toponym is numbered in figure is respectively：1- main bodys, 11- the first coiling connecting poles, the first coilings of 12- connect
Connect section, 2- transition regions, 21- third coiling connecting poles, 22- third coiling linkage sections, 3- end regions, 31- the second coiling connecting poles,
32- the second coiling linkage sections, the first connecting bridges of 4-, the 4th coiling connecting poles of 23-, the 4th coiling linkage sections of 24-, 25- the 5th around
Line connecting pole, the 5th coiling linkage sections of 26-, the second connecting bridges of 5-, 6- third connecting bridges, the 4th connecting bridges of 7-, the connections of 8- the 5th
Bridge, the 6th connecting bridges of 9-.
Specific embodiment
Below in conjunction with attached drawing, by specific embodiment, the invention will be further described：
See Fig. 1, Fig. 2, a kind of open self-expanding stent of spiral, including main body 1, the mistake at the both ends for being connected to main body 1
It crosses area 2 and is connected to the end region 3 of transition region 2, main body 1 includes spiral-distributed first zig-zag coiling, the first sawtooth wave
It is connected between shape coiling by the first connecting bridge 4；End region 3 includes the second zig-zag coiling, end region 3 and transition region 2
Between be connected by the second connecting bridge 5, main body 1, transition region 2, end region 3 surround tubular structure, self-expanding stent tool jointly
The collapsed diameter being useful in merging blood vessel and the swell diameter for supporting expansion in the blood vessel, entire end region 3 forms well-balanced close
Ring structure, is conducive to stent both ends uniform force during being pushed and discharging, having good uniformity, and same during stent expansion
When strengthen the overall construction intensity of stent.In fact, the second zig-zag coiling can also set 2 groups of even more, second saws
It can be substantially identical with the set-up mode of the second connecting bridge 5 by connecting bridge being set to be interconnected again between tooth waveform coiling.Scheming
It can also see that the second zig-zag coiling forms an outer flaring relative to scaffold in stent expansion state in 3, outside
Flaring is more preferably 10 degree relative to the angle α that extends out of scaffold, can stably and firmly be bonded blood vessel, avoid propping up
The deviation of frame in the blood vessel, this scheme put it into a specific sizing jig after the completion of tubular bracket engraving（If
It is 4mm to need the outer diameter that stent reaches, then sizing jig is exactly 4mm, if desired outer to be flared, then with regard to needing the jig that will shape
It is made with the conical surface extended out）It is interior, it can be realized by heat treatment.The length of second coiling connecting pole 31 is more than the first coiling
The length of connecting pole 11, the thickness of practical second coiling connecting pole 31 radial direction maximum span and the first coiling connecting pole 11 in other words
It is identical, to ensure overall construction design consistency and with more excellent effect, this is designed with holds conducive to the pressure of stent, if second around
Line connecting pole 31 is partially short, then is easily tilted when pressure holds stent, and it is very difficult that pressure is caused to be held.End region 3 is further included set on
Developing body on two coiling linkage sections 32, developing body are tantalum or the impervious marker of the X-rays such as platinum or gold, can propped up
Frame guide-localization in blood vessel plays great role, and developing body generally sets 5 in each end region 3, increases stent and is discharging
When stress point, be conducive to the conduction of release force.
Transition region 2 includes the coiling of third zig-zag, the 4th zig-zag coiling and the 5th zig-zag coiling, the 4th saw
The coiling of tooth waveform, the 5th zig-zag coiling are all connected to third zig-zag coiling；The coiling of third zig-zag and the first saw
It is connected between tooth waveform coiling by third connecting bridge 6, is led between the 4th zig-zag coiling and the first zig-zag coiling
It crosses the 4th connecting bridge 7 to be connected, be connected between the 4th zig-zag coiling and the 5th zig-zag coiling by the 5th connecting bridge 8
It connects.
First zig-zag coiling includes multiple first coiling units, and the first coiling unit includes the first coiling connecting pole 11
With the first coiling linkage section 12 for being connected to 11 top of the first coiling connecting pole；Second zig-zag coiling include multiple second around
Line unit, the second coiling unit include the second coiling connecting pole 31 and the second coiling for being connected to 31 top of the second coiling connecting pole
Linkage section 32；The coiling of third zig-zag includes multiple third coiling units, and third coiling unit includes third coiling connecting pole
21 and it is connected to the third coiling linkage section 22 on 21 top of third coiling connecting pole；4th zig-zag coiling includes multiple four
Coiling unit, the 4th coiling unit include the 4th coiling connecting pole 23 and be connected to the 4th of 23 top of the 4th coiling connecting pole around
Line linkage section 24；5th zig-zag coiling includes multiple 5th coiling units, and the 5th coiling unit is connected including the 5th coiling
Column 25 and the 5th coiling linkage section 26 for being connected to 25 top of the 5th coiling connecting pole.
5th zig-zag coiling open the 4th zig-zag coiling of the 5th coiling linkage section 26/ of the first section open the first section
4th coiling linkage section 24 is connected with the last section third coiling linkage section 22 of third zig-zag coiling, the 4th sawtooth wave
Shape coiling open the 4th coiling connecting pole 23/ of the first section the 5th zig-zag coiling open the 5th coiling connecting pole 25 of the first section
One top is connected with the last section third coiling connecting pole 21 of third zig-zag coiling by the 6th connecting bridge 9, aforementioned
In "/" separator imply that two kinds of optional installation positions, for example the installation position of the 6th connecting bridge 9 can be opposite in figure
The left side or the right.Opening for the 5th zig-zag coiling of the 4th coiling connecting pole 23/ of the first section is opened in 4th zig-zag coiling
There are shapes between the last of the 5th coiling connecting pole 25 of the first section and third zig-zag coiling section third coiling connecting pole 21
Become spatial transition, the span of deformation spatial transition is limited by the 6th connecting bridge 9.One end of 6th connecting bridge 9 is connected to third saw
The central region of the last section third coiling connecting pole 21 of tooth waveform coiling, the length of central region account for third zig-zag around
The 1/3 of the last 21 length of section third coiling connecting pole of line.The link position of 6th connecting bridge 9 can meet transition region expansion
Action during release, and ensure that deformation spatial transition has suitable effective spatial position and horizontal span, longitudinal span.
First connecting bridge 4, third connecting bridge 6, the 4th connecting bridge 7, the 5th connecting bridge 8 are tilted relative to scaffold and are biased to
In the same side；The inclined direction of 6th connecting bridge 9 is connect with the first connecting bridge 4, third connecting bridge 6, the 4th connecting bridge the 7, the 5th
The inclined direction of bridge 8 is identical, and the inclined degree of the 6th connecting bridge 9 is respectively less than the first connecting bridge 4, third connecting bridge the 6, the 4th
The inclined degree of connecting bridge 7, the 5th connecting bridge 8 ensures that the 6th connecting bridge 9 can coordinate deformation spatial transition to make releasing for transition region
Stress smooth-going conduction, stepless action are put, and ensures the compliance and consistency of stent entirety, while can be by deformation spatial transition
Stent short-axis direction on span be limited to desired value.The toughness of 6th connecting bridge 9 is better than the first connecting bridge 4, third connects
Connect bridge 6, the 4th connecting bridge 7, the toughness of the 5th connecting bridge 8.6th connecting bridge 9 is the key effect point of the transition of power, to difference
The adaptive faculty of application environment is more preferable, and not easy to break.
The equal length of each first coiling connecting pole 11；Third coiling connecting pole 21, the 4th coiling connecting pole the 23, the 5th
The length of coiling connecting pole 25 is from respective the first section of opening to the gradually increase of the last section.The length of third connecting bridge 6 is gradual
Increase and there is same augment direction relative to third coiling connecting pole 21.Third connecting bridge 6 coordinates the 6th connecting bridge 9 and shape
Become the structure of spatial transition and there is different length here, compliance and consistency during ensureing that stent integrally collapses.
The length variation range of third coiling connecting pole 21 is 1.0 ~ 1.5 times of the first coiling connecting pole 11, the 4th coiling connecting pole 23
Length variation range be 0.5 ~ 1.0 times of the first coiling connecting pole 11, the length variation range of the 5th coiling connecting pole 25 is
0.5 ~ 1.0 times of first coiling connecting pole 11, crossing conference makes support unstable, too small to reduce compliance, expansion or shrinkage difficulty,
Practical third coiling connecting pole 21, the 4th coiling connecting pole 23, the 5th coiling connecting pole 25 thickness in other words radially it is maximum across
Degree is identical with the first coiling connecting pole 11, ensures overall structure consistency and with more excellent effect.
First connecting bridge 4 is connected to two the first coiling linkage sections 12 for belonging to two adjacent groups the first zig-zag coiling
Between；Second connecting bridge 5 is connected between the second coiling linkage section 32 and third coiling linkage section 22, the second coiling linkage section 32
Between the 5th coiling linkage section 26；Third connecting bridge 6 be connected to third coiling linkage section 22 and the first coiling linkage section 12 it
Between；4th connecting bridge 7 is connected between the 4th coiling linkage section 24 and the first coiling linkage section 12；5th connecting bridge 8 is connected to
Between 4th coiling linkage section 24 and the 5th coiling linkage section 26.Every two the first coilings in every group of first zig-zag coiling
Linkage section 12 is connected with one first connecting bridge 4, and general first connecting bridge 4 is in the first zig-zag coiling described in two adjacent groups
Between setting number for 5 ~ 6, two the first coiling linkage sections 12 being connected to are not face yet, and are offset from each other；
There are two the second coiling linkage section 32 and two third coiling linkage sections 22 or two at interval between two neighboring second connecting bridge 5
5th coiling linkage section 26 or a third coiling linkage section 22 and a 5th coiling linkage section 26, general second connection
The setting number of bridge 5 is 5 ~ 6, the second coiling linkage section 32 being connected to and third coiling linkage section 22 or the second coiling
32 and the 5th coiling linkage section 26 of linkage section is facing each other, thus the second connecting bridge 5 is parallel relative to scaffold
's；Third coiling linkage section 22 and two the first coiling linkage sections 12 there are two being spaced between adjacent third connecting bridge 6, generally
The setting number of the third connecting bridge 6 is 2 ~ 3, the first coiling linkage section 12 and third coiling linkage section 22 being connected to
It is not face, and is offset from each other yet；There are two the 4th coiling linkage section 24 and two the at interval between adjacent 4th connecting bridge 7
One coiling linkage section 12, the setting number of the general third connecting bridge 6 is 2 ~ 3, the first coiling linkage section being connected to
12 and the 4th coiling linkage section 24 be not face yet, and be offset from each other；The number of 5th connecting bridge 8 can be set on demand, because of
Five connecting bridges 8 can coordinate the 4th zig-zag coiling and the 5th zig-zag coiling to form polygon Shape closed framework, can be with drug
Coating demand, cost input demand, structural strength demand caused by polygon Shape closed framework are determined, and generally set 2 ~ 4, institute
The 4th coiling linkage section 24 being connected to and the 5th coiling linkage section 26 are not face yet, and are offset from each other；Certain stent
Size has common and special requirement, the setting of above-mentioned number also can accordingly make transformation with the size change over of stent, this
It is provided with the conduction of power during being pushed and discharge conducive to stent a bit, there can be enough axial forces can during stent release
So that stent is timely and completely discharges in the blood vessel, avoids sustained release or release imperfect, strengthen axial bending property.
Claims (13)
1. a kind of open self-expanding stent of spiral, including main body（1）, be connected to the main body（1）Both ends transition region
（2）Be connected to the transition region（2）End region（3）, the main body（1）Including spiral-distributed first zig-zag around
Line passes through the first connecting bridge between the first zig-zag coiling（4）It is connected；The end region（3）Including the second sawtooth
Waveform coiling, the end region（3）With the transition region（2）Between pass through the second connecting bridge（5）It is connected, the main body（1）、
The transition region（2）, the end region（3）Tubular structure is surrounded jointly, and the self-expanding stent has to be placed in blood vessel
Collapsed diameter and in the blood vessel support expand swell diameter, it is characterised in that：The transition region（2）Including third sawtooth wave
Shape coiling, the 4th zig-zag coiling and the 5th zig-zag coiling, the 4th zig-zag coiling, the 5th sawtooth wave
Shape coiling is all connected to the third zig-zag coiling；The third zig-zag coiling and the first zig-zag coiling
Between pass through third connecting bridge（6）It is connected, leads between the 4th zig-zag coiling and the first zig-zag coiling
Cross the 4th connecting bridge（7）It is connected, passes through the 5th between the 4th zig-zag coiling and the 5th zig-zag coiling
Connecting bridge（8）It is connected；
The first zig-zag coiling includes multiple first coiling units, and first coiling unit is connected including the first coiling
Column（11）Be connected to the first coiling connecting pole（11）The first coiling linkage section on top（12）；Second zig-zag
Coiling includes multiple second coiling units, and second coiling unit includes the second coiling connecting pole（31）Be connected to described
Two coiling connecting poles（31）The second coiling linkage section on top（32）；The third zig-zag coiling includes multiple third coilings
Unit, the third coiling unit include third coiling connecting pole（21）Be connected to the third coiling connecting pole（21）Top
Third coiling linkage section（22）；The 4th zig-zag coiling includes multiple 4th coiling units, the 4th coiling list
Member includes the 4th coiling connecting pole（23）Be connected to the 4th coiling connecting pole（23）The 4th coiling linkage section on top
（24）；The 5th zig-zag coiling includes multiple 5th coiling units, and the 5th coiling unit connects including the 5th coiling
Connect column（25）Be connected to the 5th coiling connecting pole（25）The 5th coiling linkage section on top（26）；
The 5th coiling linkage section described in the first section is opened in the 5th zig-zag coiling（26）/ the 4th zig-zag coiling
Open the 4th coiling linkage section described in the first section（24）The third coiling is saved with the last of the third zig-zag coiling
Linkage section（22）It is connected, the 4th coiling connecting pole described in the first section is opened in the 4th zig-zag coiling（23）/ described
The 5th coiling connecting pole described in the first section is opened in five zig-zag coilings（25）A top and the third zig-zag coiling
The last save described third coiling connecting pole（21）Pass through the 6th connecting bridge（9）It is connected；
The 4th coiling connecting pole described in the first section is opened in the 4th zig-zag coiling（23）/ the 5th zig-zag coiling
Open the 5th coiling connecting pole described in the first section（25）The third coiling is saved with the last of the third zig-zag coiling
Connecting pole（21）Between there are deformation spatial transitions, the span of the deformation spatial transition is by the 6th connecting bridge（9）It limits；
6th connecting bridge（9）One end be connected to the last of the third zig-zag coiling and save described third coiling and connect
Connect column（21）Central region, the length of the central region account for the third zig-zag coiling the last save described third
Coiling connecting pole（21）The 1/3 of length；
The toughness of 6th connecting bridge 9 is better than first connecting bridge 4, third connecting bridge 6, the 4th connecting bridge 7, the 5th connecting bridge 8
Toughness.
2. a kind of open self-expanding stent of spiral according to claim 1, it is characterised in that：First connecting bridge
（4）, the third connecting bridge（6）, the 4th connecting bridge（7）, the 5th connecting bridge（8）It is tilted relative to scaffold inclined
To in the same side；6th connecting bridge（9）Inclined direction and first connecting bridge（4）, the third connecting bridge（6）、
4th connecting bridge（7）, the 5th connecting bridge（8）Inclined direction it is identical.
3. a kind of open self-expanding stent of spiral according to claim 2, it is characterised in that：6th connecting bridge
（9）Inclined degree be respectively less than first connecting bridge（4）, the third connecting bridge（6）, the 4th connecting bridge（7）, it is described
5th connecting bridge（8）Inclined degree.
4. a kind of open self-expanding stent of spiral according to claim 1, it is characterised in that：Each first coiling
Connecting pole（11）Equal length；The third coiling connecting pole（21）, the 4th coiling connecting pole（23）, the described 5th around
Line connecting pole（25）Length from it is respective open the first section to the last section gradually increase.
5. a kind of open self-expanding stent of spiral according to claim 4, it is characterised in that：The third connecting bridge
（6）Length gradually increase and relative to the third coiling connecting pole（21）With same augment direction.
6. a kind of open self-expanding stent of spiral according to claim 4, it is characterised in that：The third coiling connection
Column（21）Length variation range be the first coiling connecting pole（11）1.0 ~ 1.5 times.
7. a kind of open self-expanding stent of spiral according to claim 4, it is characterised in that：The 4th coiling connection
Column（23）Length variation range be the first coiling connecting pole（11）0.5 ~ 1.0 times.
8. a kind of open self-expanding stent of spiral according to claim 4, it is characterised in that：The 5th coiling connection
Column（25）Length variation range be the first coiling connecting pole（11）0.5 ~ 1.0 times.
9. a kind of open self-expanding stent of spiral according to claim 1, it is characterised in that：First connecting bridge
（4）It is connected to two the first coiling linkage sections for belonging to the first zig-zag coiling described in two adjacent groups（12）Between；
Second connecting bridge（5）It is connected to the second coiling linkage section（32）With the third coiling linkage section（22）Between, institute
State the second coiling linkage section（32）With the 5th coiling linkage section（26）Between；The third connecting bridge（6）It is connected to described
Third coiling linkage section（22）With the first coiling linkage section（12）Between；4th connecting bridge（7）It is connected to described
Four coiling linkage sections（24）With the first coiling linkage section（12）Between；5th connecting bridge（8）It is connected to the described 4th
Coiling linkage section（24）With the 5th coiling linkage section（26）Between.
10. a kind of open self-expanding stent of spiral according to claim 9, it is characterised in that：First saw described in every group
Every two the first coiling linkage sections in tooth waveform coiling（12）It is connected with first connecting bridge（4）.
11. a kind of open self-expanding stent of spiral according to claim 9, it is characterised in that：Two neighboring described
Two connecting bridges（5）Between interval there are two the second coiling linkage section（32）And two third coiling linkage sections（22）Or
Two the 5th coiling linkage sections（26）An or third coiling linkage section（22）With a 5th coiling linkage section
（26）.
12. a kind of open self-expanding stent of spiral according to claim 9, it is characterised in that：The adjacent third connects
Connect bridge（6）Between interval there are two the third coiling linkage section（22）And two the first coiling linkage sections（12）.
13. a kind of open self-expanding stent of spiral according to claim 9, it is characterised in that：Adjacent described 4th connects
Connect bridge（7）Between interval there are two the 4th coiling linkage section（24）And two the first coiling linkage sections（12）.
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| CN201710078202.1A CN106726039B (en) | 2017-02-14 | 2017-02-14 | A kind of open self-expanding stent of spiral |
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| CN201710078202.1A CN106726039B (en) | 2017-02-14 | 2017-02-14 | A kind of open self-expanding stent of spiral |
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| CN106726039B true CN106726039B (en) | 2018-07-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018157328A1 (en) * | 2017-03-01 | 2018-09-07 | 浙江巴泰医疗科技有限公司 | Spiral open self-expandable stent |
| CN108371572B (en) * | 2018-02-11 | 2023-12-12 | 浙江巴泰医疗科技有限公司 | Spiral self-expansion bracket |
| CN108670511A (en) * | 2018-06-04 | 2018-10-19 | 浙江巴泰医疗科技有限公司 | A kind of flexible short holder of screw type |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6042597A (en) * | 1998-10-23 | 2000-03-28 | Scimed Life Systems, Inc. | Helical stent design |
| CN102458304A (en) * | 2009-05-14 | 2012-05-16 | 奥巴斯尼茨医学公司 | Self-expanding stent with polygon transition zone |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6969402B2 (en) * | 2002-07-26 | 2005-11-29 | Syntheon, Llc | Helical stent having flexible transition zone |
| US9561123B2 (en) * | 2002-08-30 | 2017-02-07 | C.R. Bard, Inc. | Highly flexible stent and method of manufacture |
| US6878162B2 (en) * | 2002-08-30 | 2005-04-12 | Edwards Lifesciences Ag | Helical stent having improved flexibility and expandability |
| US8545545B2 (en) * | 2006-10-18 | 2013-10-01 | Innovational Holdings Llc | Stent with flexible hinges |
-
2017
- 2017-02-14 CN CN201710078202.1A patent/CN106726039B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6042597A (en) * | 1998-10-23 | 2000-03-28 | Scimed Life Systems, Inc. | Helical stent design |
| CN102458304A (en) * | 2009-05-14 | 2012-05-16 | 奥巴斯尼茨医学公司 | Self-expanding stent with polygon transition zone |
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Denomination of invention: Spiral open-type self-expansion support Effective date of registration: 20200325 Granted publication date: 20180706 Pledgee: China Minsheng Banking Corp Hangzhou branch Pledgor: ZHEJIANG BATAI MEDICAL TECHNOLOGY Co.,Ltd. Registration number: Y2020330000120 |
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Denomination of invention: A spiral open self-expanding stent Effective date of registration: 20220830 Granted publication date: 20180706 Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd. Pledgor: ZHEJIANG BATAI MEDICAL TECHNOLOGY Co.,Ltd. Registration number: Y2022330001970 |