CN106344209A - Abdominal aorta covered stent and conveying device thereof and using method - Google Patents
Abdominal aorta covered stent and conveying device thereof and using method Download PDFInfo
- Publication number
- CN106344209A CN106344209A CN201610887364.5A CN201610887364A CN106344209A CN 106344209 A CN106344209 A CN 106344209A CN 201610887364 A CN201610887364 A CN 201610887364A CN 106344209 A CN106344209 A CN 106344209A
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- Prior art keywords
- stent
- main body
- branch stent
- abdominal aorta
- collar
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Classifications
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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
- A61F2/02—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
-
- 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
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
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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
- 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
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
Abstract
The invention relates to an abdominal aorta covered stent and a conveying device thereof and a using method. The abdominal aorta covered stent comprises a main body stent and lengthened stents. The main body stent comprises a metal framework and a laminating film. The metal framework comprises a plurality of elastic metal rings. The near-end of the main body stent is provided with a bare stent which is uncovered with the laminating film an can shrink inwards, the bare stent is in a W shape and has two primary wave crests, a secondary wave crest and two troughs. The top ends of the adjacent primary wave crests are provided with first fixed rings, the bottoms of the first fixed rings are provided with first barbs, the top end of the secondary wave crest is provided with a second fixed ring, and the top end of one of the two troughs is provided with a second barb. The rear end of the main body stent is provided with a first branch stent and a second branch stent. The top ends of the two lengthened stents are fixedly connected with the inside of the far-ends of the first branch stent and the second branch stent respectively through anti-dropping structures. The abdominal aorta covered stent can be used for intracavitary therapy of abdominal aortic aneurysm and can reduce occurrence rate of adverse events such as shifting and endoleak after implantation of the stent.
Description
Technical field
The invention belongs to technical field of medical instruments, particularly to a kind of endovascular stent for abdominal aorta and its conveyer device and
Using method.
Background technology
Abdominal aortic aneurysm is ventral aorta Ectasia, is due to ventral aorta hardening, the reason such as damages, infects, causes
There is limitation expansion in ventral aorta, slowly assume tumor sample under the impact of high pressure blood flow.Ventral aorta is expanded through long,
Blood vessel wall becomes very fragile, is very easy to rupture, abdominal aortic aneurysm, once rupturing, will cause and bleed profusely, someone
The title of " bomb " in vivo.With the continuous improvement of aged tendency of population increase, living standards of the people raising and medical level, abdomen is actively
Arteries and veins tumor sickness rate and recall rate are in ascendant trend year by year.
Abdominal aortic aneurysm traditional treatment mode is surgical operation therapy, replaces pathological changes actively by opening chest and abdomen with artificial blood vessel
Arteries and veins blood vessel carries out reconstructing blood vessel.But because surgical operation therapy risk is big, patient trauma is big, and complication is many, especially for
Merge the patient of the vitals pathological changes such as the heart, brain, kidney, and mortality is high.Since the nineties in 20th century, minimally invasive intervention an actor's rendering of an operatic tune
The appearance of interior iatrotechnics and development, having substituted surgical operation becomes the operation first-selection for the treatment of abdominal aortic aneurysm.By aorta
Far-end such as Human Femoral Artery otch, the induction system that will be loaded with overlay film frame pushes to diseased region, and release overlay film frame is simultaneously
Fixing, completely cut off diseased aneurysmal, rebuilding transmyocardial passageway, thus reducing aneurysm body pressure, reaching therapeutic purposes.
However, at present there are some problems in the overlay film frame for the treatment of abdominal aortic aneurysm:
First, near-end close bad, easily causes type internal hemorrhage due to trauma.This peculiar complication of internal hemorrhage due to trauma is considered as to affect the treatment, lead to
Postoperative tumor body continues to increase the main cause of even rupture.
2nd, easily cause the closure of tumor neck near-end renal artery.Especially for the sufferer that tumor neck and aneurysm major axis angle are larger
Structure, existing overlay film frame structure is most of to be only had anti-overlay film frame and is washed away, by blood flow, the design causing displacement downwards, do not consider by
When tumor neck and aneurysm major axis angle are larger, lesser curvature side after overlay film frame implantation move and leads to support overlay film part closure kidney
Arterial ostium, causes the situation of renal ischemic.
3rd, excessive to blood vessel wall impulsive force after barbed bare bracket release, blood vessel wall is caused damage.Bare bracket near-end is locked
Before structure release, the overlay film part being connected with bare bracket is strutted completely, after opening near-end retaining mechanism, bare bracket band
Agnail near-end suddenly " blowing ", damages this fragile blood vessel wall.
Content of the invention
It is an object of the invention to provide a kind of endovascular stent for abdominal aorta, it can be used for the intracavity of abdominal aortic aneurysm and controls
Treat, it can reduce the incidence rate of the adverse events such as stenter to implant retrodisplacement, internal hemorrhage due to trauma.
It is a further object of the present invention to provide a kind of conveyer device of endovascular stent for abdominal aorta, its structure is simple, operation
Convenient, the injury to blood vessel wall can be reduced by two-stage release.
Another object of the present invention is to provide a kind of using method of endovascular stent for abdominal aorta, and operation is simple and reliable for it,
The Stability and veracity of support release can be improved.
For achieving the above object, the present invention takes technical scheme below:
A kind of endovascular stent for abdominal aorta, it includes main body rack and two extending brackets；
This main body rack includes metallic framework and overlay film；This metallic framework includes some eyelets, each elastic metallic
Circle undulate；What this main body rack near-end was provided with uncoated overlay film can be to the annular bare bracket of contract, this bare bracket node
In w type, there are two one-level crests, a secondary wave peak and two troughs；It is fixing that adjacent fist-order wave summit end is provided with first
Ring, this first retainer ring bottom is provided with the first agnail extending towards this main body rack rear end；This secondary wave summit end is provided with second
Retainer ring；One of two troughs trough top is provided with the second agnail extending towards this first agnail；This main body rack rear end
There is the first branch stent and the second branch stent；
The top of two extending brackets is fixedly connected on this first branch stent and the second branch by disconnecting prevention structure respectively
The distal internal of support.
Further, described disconnecting prevention structure is: the distal medial of described first branch stent and the second branch stent is all provided with
There are some anticreep barbs, each anticreep barb circumferentially arranges, tip towards described bare bracket and extends internally；Described each prolongation props up
The top periphery of frame is provided with and this anticreep barb corresponding anticreep collar；This anticreep collar section is curved, also circumferentially arranges；
This anticreep barb inserts in the corresponding anticreep collar；Or
Described disconnecting prevention structure is: the distal medial of described first branch stent and the second branch stent is equipped with some anticreeps
The collar, each anticreep collar section is curved, and circumferentially arranges；The top periphery of described each extending bracket is provided with and this Anti-slip cover
Ring corresponding anticreep barb, tip dorsad described bare bracket stretching out, also circumferentially arrange；The insertion of this anticreep barb corresponds to
The anticreep collar in.
Further, described bare bracket is in integrally broadening formation, and internal diameter is gradually increased from inside to outside, this bare bracket outer wall with
Angle between described main body rack axis is 10-30 degree.
Further, the near-end of the near-end of described main body rack and described extending bracket is equipped with the crest ripple overlapping
Two relative section small band support rings of paddy, this small band support ring string diameter is 0.1-0.4mm, and head number is 10-20.
Further, the length of described first branch stent is more than the length of described second branch stent；Described first point
The metallic framework of support and the second branch stent is located at the outside of overlay film.
Further, secondary wave peak height 5mm-15mm described in described one-level crest ratio.
Further, described main body rack and extending bracket are equipped with developing mark；
The developing mark of this main body rack is arranged at the overlay film near-end of this main body rack, described first branch stent and second
The intersection of branch stent, and the far-end of described first branch stent and the second branch stent；
The developing mark of described extending bracket is arranged at the overlay film of this extending bracket proximally and distally.
Further, the described anticreep collar and anticreep barb quantity are equal, are 3-8；The metal bone of described extending bracket
Frame is integrated helical structure.
A kind of conveyer device of described endovascular stent for abdominal aorta, it includes outer tube and is located in this outer tube
Pipe；In this, pipe is located at this outer tube lower end, has for accommodating the endovascular stent for abdominal aorta after folding above pipe in this
Accommodation space；It is provided with inner tube, this inner tube passes this outer tube and near-end is provided with the first lock collar, this first lock collar is outside inside pipe in this
Extend and be provided with some lock pins；Be equipped with central canal in this inner tube, this central canal near-end be sequentially provided with the second lock collar, the 3rd lock collar and
Sharp mouth；This second lock collar and the 3rd lock collar are polygonal star structure, and each Xing Jiao end is equipped with through hole；Described first Fixing shrink ring
Enter in the star angle of the 3rd lock collar, described second retainer ring is inserted in the star angle of this second lock collar；This lock pin penetrates in each through hole,
Described first retainer ring and the second retainer ring are limited in inside corresponding star angle.
A kind of using method of described endovascular stent for abdominal aorta, it utilizes above-mentioned conveyer device, this using method bag
Include the following step:
A. put into after the compression of described endovascular stent for abdominal aorta in described accommodation space；
B. by aortic aneurysm to be repaired for the outer tube implantation of described conveyer device；
C. discharge described main body rack near-end overlay film part, and according to the developing mark adjustment main body rack position on overlay film
Put, after determining position, continue drop-down outer tube, so that the second branch stent is discharged completely；
D. partly drop back described first lock collar, make described lock pin leave the through hole of described 3rd lock collar, release first is fixing
Ring；
E. continue described first lock collar of dropping back, make described lock pin leave the through hole of described second lock collar, release second is fixing
Ring, makes described bare bracket discharge completely；
F. described extending bracket offside is implanted the second branch stent and the far-end with described second branch stent is fixed even
Connect；
G. continue drop-down outer tube, after so that the first branch stent is discharged completely, homonymy implants another extending bracket, so that prolongation is propped up
Frame is fixedly connected with described first branch stent far-end.
The invention has the beneficial effects as follows:
First, by the small band support ring that the Wave crest and wave trough overlapping is relative, main body rack near-end can fully be held round
Overlay film part, reduces i type internal hemorrhage due to trauma risk；
2nd, by being arranged at the crest of bare bracket, the first agnail in opposite direction at trough and the second agnail, can in case
While only support shifts downwards, it is possible to decrease because tumor neck transition distortion causes, closure renal artery blood vessel is moved on support lesser curvature side overlay film
The risk of branch；
3rd, relieving mechanism after the classification of bare bracket, can reduce the impact to blood vessel wall when bare bracket struts, simultaneously naked
After support first-order release, according to the bare bracket partly opening, anchor station can be adjusted again, improve support release accuracy and
Stability.
Brief description
Fig. 1 is the structural representation of the main body rack of first embodiment of the invention.
Fig. 2 is the distal structure schematic diagram of the first branch stent of first embodiment of the invention.
Fig. 3 is the distal sections schematic diagram of the first branch stent of first embodiment of the invention.
Fig. 4 is the structural representation of the extending bracket of first embodiment of the invention.
Fig. 5 is the structural representation of the anticreep barb of extending bracket of first embodiment of the invention.
Fig. 6 is the structural representation of the main body rack of second embodiment of the invention.
Fig. 7 is the distal structure schematic diagram of the first branch stent of second embodiment of the invention.
Fig. 8 is the distal sections schematic diagram of the first branch stent of second embodiment of the invention.
Fig. 9 is the structural representation of the anticreep barb of the first branch stent of second embodiment of the invention.
Figure 10 is the structural representation of the extending bracket of second embodiment of the invention.
Figure 11 is the structural representation of the conveyer device of endovascular stent for abdominal aorta of the present invention.
Figure 12 is the sectional view in a-a direction in Figure 11.
Figure 13 is the sectional view in b-b direction in Figure 11.
Figure 14 is the mould expanded view of the metallic framework shaper of extending bracket of the present invention.
Figure 15-18 is the use process schematic of the present invention.
Specific embodiment
With reference to the accompanying drawings the specific embodiment of the present invention is described in detail.
Described in literary composition, near-end refers to endovascular stent for abdominal aorta one end near heart, and far-end refers to that ventral aorta overlay film props up
Frame is away from one end of heart.
As Figure 1-Figure 5, the present invention provides a kind of endovascular stent for abdominal aorta, and the intracavity that can be used for abdominal aortic aneurysm is controlled
Treat, it can reduce stenter to implant retrodisplacement, the incidence rate of the adverse events such as internal hemorrhage due to trauma, it includes main body rack 1 and two prolongations
Support 2.
This main body rack 1 includes metallic framework 11 and overlay film 12.This metallic framework 11 includes some eyelets, each bullet
Property quoit undulate.What this main body rack 1 near-end was provided with uncoated overlay film can be to the annular bare bracket 13 of contract, and this is naked
Support 13 node is in w type, has 131, secondary wave peak 132 of two one-level crests and two troughs 133.This one-level crest
131 5mm-15mms higher than this secondary wave peak 132, discharge after can be used for 13 2 grades of bare bracket in course of conveying.Trough 133 is by medical
Stitching thread is attached with overlay film 12 material, in order to ensure bonding strength, bare bracket 13 and overlay film 12 overlapping material 2mm-5mm.
This bare bracket 13 is overall to be in broadening formation, and internal diameter is gradually increased from inside to outside, this bare bracket 13 outer wall and this main body rack 1 axis
Between angle be 10-30 degree.Adjacent one-level crest 131 top is provided with the first retainer ring 3, and this first retainer ring 3 bottom sets
There is the first agnail 31 extending towards this main body rack 1 rear end.This secondary wave peak 132 top is provided with the second retainer ring 4.Two troughs
One of 133 trough tops are provided with the second agnail 41 extending towards this first agnail 31.This main body rack 1 rear end has first
Branch stent 5 and the second branch stent 6.The length of this first branch stent 5 is more than the length of this second branch stent 6.This
The metallic framework of one branch stent 5 and the second branch stent 6 is located at the outside of overlay film.Folder between the first agnail 31 and bare bracket 13
Angle is 30 degree, is used for preventing main body rack 1 to be shifted over to heart far-end under blood flow impact etc. acts on, the second agnail 41 with naked
Angle between support 13 is 30 degree, is used for preventing tumor neck lesser curvature side support from shifting to heart near-end, prevents overlay film closing renal artery
Branch vessel.
This extending bracket 2 also has metallic framework 21 and overlay film 22, and the top of two extending brackets 2 is tied by anticreep respectively
Structure is fixedly connected on this first branch stent 5 and the distal internal of the second branch stent 6.
The metallic framework of main body rack 1 and extending bracket 2 can be made up of niti shape memory alloy material, heat treatment shaping
For sinusoidal wave form, " w " shape or the waveform that can compress, covering material can be medical polyester material, metallic framework and doctor
It is attached by suture with terylene.
This disconnecting prevention structure is: the distal medial of this first branch stent 5 and the second branch stent 6 is equipped with some Anti-slip covers
Ring 7, each anticreep collar 7 section is curved, and circumferentially arranges, and the proximal-distal of the anticreep collar 7 does not block.Each extending bracket 2
Top periphery be provided with anticreep barb 8 corresponding with this anticreep collar 7, tip dorsad this bare bracket 13 stretching out, be also in
Circumferential arrangement.This anticreep barb 8 inserts in the corresponding anticreep collar 7.This anticreep collar 7 and anticreep barb 8 quantity are equal, are 3-
8.The metallic framework 21 of extending bracket 2 can separate it is also possible to be set to integrated spiral formula structure.
In addition, the near-end of this main body rack 1 and the near-end of this extending bracket 2 to be equipped with the Wave crest and wave trough overlapping relative
Two section small band support rings 10, this small band support ring 10 string diameter be 0.1-0.4mm, head number be 10-20, can fully will prop up
Frame near-end covering material holds round, and the adaptability to tumor body structure for the lifting bracket, reduces i type internal hemorrhage due to trauma risk.
For the ease of adjusting position in human body for the support, this main body rack 1 and extending bracket 2 are equipped with developing mark.
Developing mark can be by gold, and the metal such as platinum makes " o " shape or the figure of eight.The developing mark of this main body rack 1 is arranged at this
The intersection of overlay film 12 near-end, this first branch stent 5 and the second branch stent 6 of main body rack 1, and this first branch props up
Frame 5 and the far-end of the second branch stent 6.The developing mark of this extending bracket 2 is arranged at overlay film 22 near-end of this extending bracket 2.
Long according to the overlap joint of developing mark regulation two section supports after first, second branch stent of extending bracket 2 implantation main body rack 1
Degree is so as to overlap length is more than 20mm.
The above is the first embodiment of endovascular stent for abdominal aorta of the present invention, and Fig. 6-Figure 10 is implemented for the present invention second
Example, disconnecting prevention structure is different for its differing only in from first embodiment, and this disconnecting prevention structure is: this first branch stent 5 and second
The distal medial of branch stent 6 is equipped with some anticreep barbs 8, and each anticreep barb 8 circumferentially arranges, and tip is towards this bare bracket
13 and extend internally.The top periphery of each extending bracket 2 is provided with the anticreep collar 7 corresponding with this anticreep barb 8.This anticreep collar
7 sections are curved, also circumferentially arrange.This anticreep barb 8 inserts in the corresponding anticreep collar 7.
As figs 11-13, the present invention also provides a kind of conveyer device 9 of above-mentioned endovascular stent for abdominal aorta, and it includes
Outer tube 91 and be located at this outer tube 91 within middle pipe 92.In this, pipe 92 is located at this outer tube 91 interior lower end, pipe 92 top tool in this
There is the accommodation space 93 for accommodating the endovascular stent for abdominal aorta after folding.It is provided with inner tube 94, this inner tube inside pipe 92 in this
94 pass this outer tube 91 and far-end is provided with the first lock collar 941, and this first lock collar 941 stretches out and is provided with some lock pins 942.This is interior
It is equipped with central canal 95, this central canal 95 far-end is sequentially provided with the second lock collar 96, the 3rd lock collar 97 and sharp mouth 98 in pipe 94.This
Two lock collars 96 and the 3rd lock collar 97 are polygonal star structure, and each star angle far-end is equipped with through hole.This first retainer ring 3 be inserted in this
In the star angle of three lock collars 97, this second retainer ring 4 is inserted in the star angle of this second lock collar 96.This lock pin 942 penetrates in each through hole,
This first retainer ring 3 and the second retainer ring 4 are limited in inside corresponding star angle.
In addition, the metallic framework 21 of the extending bracket 2 of the present invention is preferably integrated spiral structure, pattern is launched such as in its side
Shown in Figure 14.
As shown in Figure 15-Figure 18, the present invention also provides a kind of using method of above-mentioned endovascular stent for abdominal aorta, and it utilizes
Above-mentioned conveyer device 9, this using method comprises the following steps:
A. put into after the compression of this endovascular stent for abdominal aorta in this accommodation space 93.
B. by femoral artery otch, the outer tube 91 of this conveyer device 9 is delivered to abdominal aortic aneurysm position.
C. discharge overlay film 12 part of this main body rack 1, now the two-stage crest of bare bracket 13 is in locking state, and root
According to developing mark adjustment main body rack 1 position on overlay film 12.
D. main body rack 1 position is adjusted so as to have enough grapplings according to main body rack 1 overlay film 12 near-end developing mark
Region, blocks renal artery branch blood vessel simultaneously and not, and adjustment good position rear portion is divided recession this first lock collar 941, made this lock pin 942
Leave the through hole of the 3rd lock collar 97, discharge the first retainer ring 3.Secondary wave peak 132 is now still in locking state.
E. main body rack 1 position is adjusted again according to developing mark and bare bracket 13, continues this first lock collar 941 of dropping back,
Make this lock pin 942 leave the through hole of this second lock collar 96, discharge the second retainer ring 4, so that this bare bracket 13 is discharged completely, with blood vessel
Wall is gently fitted.
F. described extending bracket 2 offside is implanted the second branch stent and the far-end with described second branch stent is fixed even
Connect.
G. continue drop-down outer tube, after so that the first branch stent is discharged completely, homonymy implants extending bracket, so that another prolongation is propped up
Frame is fixedly connected with described first branch stent far-end.
Now, support discharges completely, and the first agnail 31, the second agnail 41 become owner of arterial blood tube wall respectively, prevents from leading
Body support frame 1 proximally shifts to distal travel and tumor neck lesser curvature side support, and the abundant grappling of realization body support 1 is determined with accurately
Position, completes the intracavitary therapy of abdominal aortic aneurysm.
It should be noted that the above be only the present invention preferably specific embodiment and in order to make this
Skilled person is better understood from the present invention, does not apply to limit the scope of the present invention and application, every essence in the present invention
Within god or principle, any modification, equivalent substitution and improvement done etc. should be included within the scope of the present invention protected.
Claims (10)
1. a kind of endovascular stent for abdominal aorta is it is characterised in that it includes main body rack and two extending brackets；
This main body rack includes metallic framework and overlay film；This metallic framework includes some eyelets, and each eyelet is in
Waveform；This main body rack near-end be provided with uncoated overlay film can to the annular bare bracket of contract, this bare bracket node be in w
Type, has two one-level crests, a secondary wave peak and two troughs；Adjacent fist-order wave summit end is provided with the first retainer ring,
This first retainer ring bottom is provided with the first agnail extending towards this main body rack rear end；It is fixing that this secondary wave summit end is provided with second
Ring；One of two troughs trough top is provided with the second agnail extending towards this first agnail；This main body rack rear end has
First branch stent and the second branch stent；
The top of two extending brackets is fixedly connected on this first branch stent and the second branch stent by disconnecting prevention structure respectively
Distal internal.
2. endovascular stent for abdominal aorta according to claim 1 it is characterised in that: described disconnecting prevention structure is: described first
The distal medial of branch stent and the second branch stent is equipped with some anticreep barbs, and each anticreep barb circumferentially arranges, most advanced and sophisticated
Towards described bare bracket and extend internally；The top periphery of described each extending bracket is provided with and this corresponding Anti-slip cover of anticreep barb
Ring；This anticreep collar section is curved, also circumferentially arranges；This anticreep barb inserts in the corresponding anticreep collar；Or
Described disconnecting prevention structure is: the distal medial of described first branch stent and the second branch stent is equipped with some Anti-slip covers
Ring, each anticreep collar section is curved, and circumferentially arranges；The top periphery of described each extending bracket is provided with and this anticreep collar
Corresponding anticreep barb, tip dorsad described bare bracket stretching out, also circumferentially arrange；The insertion of this anticreep barb is corresponding
In the anticreep collar.
3. endovascular stent for abdominal aorta according to claim 1 and 2 it is characterised in that: described bare bracket integrally be in loudspeaker
The shape of the mouth as one speaks, internal diameter is gradually increased from inside to outside, and the angle between this bare bracket outer wall and described main body rack axis is 10-30 degree.
4. endovascular stent for abdominal aorta according to claim 1 and 2 it is characterised in that: the near-end of described main body rack and
The near-end of described extending bracket is equipped with two relative section small band support rings of the Wave crest and wave trough overlapping, this small band support
Circumfili footpath is 0.1-0.4mm, and head number is 10-20.
5. endovascular stent for abdominal aorta according to claim 1 and 2 it is characterised in that: the length of described first branch stent
Degree is more than the length of described second branch stent；The metallic framework of described first branch stent and the second branch stent is located at overlay film
Outside.
6. endovascular stent for abdominal aorta according to claim 1 and 2 it is characterised in that: two described in described one-level crest ratio
Level crest height of wave 5mm-15mm.
7. endovascular stent for abdominal aorta according to claim 1 and 2 it is characterised in that: described main body rack and extend
Frame is equipped with developing mark；
The developing mark of this main body rack is arranged at overlay film near-end, described first branch stent and second branch of this main body rack
The intersection of support, and the far-end of described first branch stent and the second branch stent；
The developing mark of described extending bracket is arranged at the overlay film of this extending bracket proximally and distally.
8. endovascular stent for abdominal aorta according to claim 2 it is characterised in that: the described anticreep collar and anticreep barb number
Amount is equal, is 3-8；The metallic framework of described extending bracket is integrated helical structure.
9. the endovascular stent for abdominal aorta any one of a kind of claim 1 to 8 conveyer device it is characterised in that it
Middle pipe including outer tube with positioned at this outer tube；In this, pipe is located at this outer tube far-end, has for holding above pipe in this
The accommodation space of the endovascular stent for abdominal aorta received after compressing；It is provided with inner tube, this inner tube passes this outer tube and near inside pipe in this
End is provided with the first lock collar, and this first lock collar stretches out and is provided with some lock pins；It is equipped with central canal, this central canal is near in this inner tube
End is sequentially provided with the second lock collar, the 3rd lock collar and Jian Zui；This second lock collar and the 3rd lock collar are polygonal star structure, each star angle end
End is equipped with through hole；Described first retainer ring is inserted in the star angle of the 3rd lock collar, and described second retainer ring is inserted in this second lock
In the star angle of disk；This lock pin penetrates in each through hole, and described first retainer ring and the second retainer ring are limited in corresponding star angle
Portion.
10. the endovascular stent for abdominal aorta any one of a kind of claim 1 to 8 using method it is characterised in that it
Using a conveyer device, the middle pipe that this conveyer device includes outer tube and is located at this outer tube；In this, pipe is located at this outer tube
Lower end, has the accommodation space for accommodating the endovascular stent for abdominal aorta after folding above pipe in this；It is provided with inside pipe in this
Inner tube, this inner tube passes this outer tube and near-end is provided with the first lock collar, and this first lock collar stretches out and is provided with some lock pins；This inner tube
Inside it is equipped with central canal, this central canal near-end is sequentially provided with the second lock collar, the 3rd lock collar and Jian Zui；This second lock collar and the 3rd lock
Disk is polygonal star structure, and each Xing Jiao end is equipped with through hole；Described first retainer ring is inserted in the star angle of the 3rd lock collar, institute
State the second retainer ring to be inserted in the star angle of this second lock collar；This lock pin penetrates in each through hole, by described first retainer ring and second
Retainer ring is limited in inside corresponding star angle；
This using method comprises the following steps:
A. put into after the compression of described endovascular stent for abdominal aorta in described accommodation space；
B. by aortic aneurysm to be repaired for the outer tube implantation of described conveyer device；
C. discharge described main body rack near-end overlay film part, and main body rack position is adjusted according to the developing mark on overlay film, really
Positioning postpones, and continues drop-down outer tube, so that the second branch stent is discharged completely；
D. partly drop back described first lock collar, make described lock pin leave the through hole of described 3rd lock collar, discharge the first retainer ring；
E. continue described first lock collar of dropping back, make described lock pin leave the through hole of described second lock collar, discharge the second retainer ring, make
Described bare bracket discharges completely；
F. described extending bracket offside is implanted the second branch stent and the far-end with described second branch stent is fixedly connected；
G. continue drop-down outer tube, after so that the first branch stent is discharged completely, homonymy implant another extending bracket, make extending bracket with
Described first branch stent far-end is fixedly connected.
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| CN105943046A (en) * | 2016-06-06 | 2016-09-21 | 任勇 | Tumor body impedance monitoring device and method based on abdominal aortic stent |
| CN109419568A (en) * | 2017-08-28 | 2019-03-05 | 先健科技(深圳)有限公司 | Overlay film frame |
| CN109984864A (en) * | 2017-12-29 | 2019-07-09 | 先健科技(深圳)有限公司 | Bracket for branch vessel |
| CN110833469A (en) * | 2018-08-17 | 2020-02-25 | 先健科技(深圳)有限公司 | Covered stent |
| CN112472380A (en) * | 2019-09-12 | 2021-03-12 | 深圳市先健畅通医疗有限公司 | Covered stent |
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| CN115363676A (en) * | 2022-10-27 | 2022-11-22 | 北京华脉泰科医疗器械股份有限公司 | Stackable released intratumoral sealing stent and conveying method thereof |
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