CN105943199A - Aortic windowing branch covered stent - Google Patents
Aortic windowing branch covered stent Download PDFInfo
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- CN105943199A CN105943199A CN201610374250.0A CN201610374250A CN105943199A CN 105943199 A CN105943199 A CN 105943199A CN 201610374250 A CN201610374250 A CN 201610374250A CN 105943199 A CN105943199 A CN 105943199A
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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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
-
- 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
- A61F2240/00—Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2240/001—Designing or manufacturing processes
-
- 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
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0019—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in hardness, e.g. Vickers, Shore, Brinell
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- Health & Medical Sciences (AREA)
- Gastroenterology & Hepatology (AREA)
- Pulmonology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses an aortic windowing branch covered stent and belongs to the technical field of vascular stents. The aortic windowing branch covered stent comprises a tubular skeleton made of thin filaments and a membrane covering the tubular skeleton. The proximal end of the tubular skeleton is suitable for being inserted into a window of the aortic windowing branch covered stent and communicated with the aortic windowing branch covered stent. The remote end of the tubular skeleton is suitable for being inserted into a branch blood vessel, and the proximal end is harder than the remote end. The aortic windowing branch covered stent lowers the operation difficulty of minimally invasive surgery in an aortic lumen with branch blood flow, solves the technical problem that in the surgery, internal leakage occurs easily, can adapt to fitting the tortuous branch blood vessel and effectively prevents damage to the branch blood vessel and occurrence of re-blocking and internal leakage.
Description
Technical field
The invention belongs to intravascular stent field, particularly to a kind of aortic windowing branch overlay film frame.
Background technology
Normal arterial wall middle level is rich in elastic fibers, carries out relaxing contracting with each heartbeat and transmits blood.Middle level is impaired, elastic fibers
Fracture, instead fibrous scar tissue, arterial wall i.e. follows the string, it is impossible to tolerance blood flow impact, cause blood vessel wall bulging or
Inner membrance tears, and forms aortic aneurysm or interlayer.Dissection of aorta is the master that a kind of state of an illness is dangerous, progress is rapid, mortality rate is high
Arterial disease, sickness rate is about 0.3%, and undressed Infant Mortality is incremented by 1% per hour, and the patient of more than 50% is in 1
Death in week.
Along with the development of Medical Technology, for dangerous arotic disease more and more use open surgery, hybridization operation or
The method of the surgeries such as Minimally Invasive Surgery carries out positive treatment.By the method for Wicresoft overlay film frame is placed into lesion locations thus reaches
To isolation pathological changes, effectively protection aortic aneurysm wall from the compressing of system arterial pressure, and then prevent aortic aneurysm, aorta rupture
Technology is referred to as aorta lumen endoprosthesis (EVAR), and this technology is because wound is little, therapeutic effect definitely has become as Type B master
The critical treatment of artery dissection and infrarenal abdominal aorta tumor selects.Main Branches blood vessel have to be retained for adjoining or involving
Pathological changes, as involved the A type interlayer of ascending aorta and aortic arch, the most conventional method is still by the artificial blood of open surgery
Pathological changes tremulous pulse replaced by pipe, in open surgery will in certain time with block aortic flow the most completely, need surgery,
Anesthesia and the close fit of extracorporeal circulation with operating room, only have several hospitals just to have the ability to carry out operation on aorta at present, add
The operation on aorta long period extracorporeal circulation, cardiac muscle block and organism temperature fluctuation, make the postoperative of aortic surgery
The incidence rate of mortality rate and other systematic complication, apparently higher than other operation on heart, especially involves the operation of aortic arch.One
Aspect is that A type interlayer patient has accounted for 80% in interlayer case, is on the other hand that open surgery difficulty is big, and post-operative complication is high,
It is difficult to carry out on a large scale, the most constantly has new technology to propose and application is for extending the scope of application of Wicresoft's EVAR,
The such as overlay film frame of band branch, windowing technology, chimney technology, periscope technology, by hybridization operation carry out turn of tidal stream for protecting
Stay the blood supply of important branch blood vessel.
In component is directed to branch vessel by the one-body molded support with branch, release has the biggest difficulty, uses Wicresoft's skill
Art the most successfully obtains the most single branch stent of clinical practice, and aortic arch part has three important branch, the spacing position of branch
Putting individual variation very big, multiple-limb support has been reported that in open surgery at present and carries out Clinical practice, but will be with three branches
Even if support be directed simultaneously to respective branch blood vessel also be extremely difficult in open surgery.Windowing technology is at overlay film
The overlay film of the branch vessel opening part that support is corresponding is windowed hole, retains the blood supply of branch, and windowing stent only need to be tried one's best window when disposing
Hole align fingers blood vessel, operates relatively easy, can apply to the reservation of multiple-limb, but easily produces I type internal hemorrhage due to trauma.Chimney
Technology is similar with periscope technology, is all the little overlay film at the outer connected component's blood vessel placed side by side of overlay film frame to aorta
Support, this technology is mostly used in one branch vessel of reservation at present, but easily presses off branch's overlay film frame, owing to overlay film props up
Frame is placed side by side, it is easy to produce I type internal hemorrhage due to trauma.
Summary of the invention
To this end, the technical problem to be solved in the present invention is to overcome the stent procedure technology requirement of existing reservation branch vessel function
High, operation easier greatly, or cannot be avoided the branch vessel of pathological changes to produce internal hemorrhage due to trauma, thus provide a kind of and be prevented effectively from dividing of pathological changes
Branch vessel produces internal hemorrhage due to trauma, is easy to the aortic windowing branch overlay film frame of operation technique.
A kind of aortic windowing branch overlay film frame of the present invention, comprises the tubular armature turned to by filament, and covers in institute
Stating the overlay film forming perisporium in tubular armature, the proximal part of described tubular armature is suitably inserted into the window of aortic windowing overlay film frame
In, connecting with described aortic windowing overlay film frame, the distal end of described tubular armature is suitably inserted in branch vessel, and described
The described proximal part of tubular armature is harder than distal end.
The diameter of described proximal part is bigger than the diameter of described distal end.
The joint of described proximal part and described distal end is tiltedly to take on transition.
Linked into an integrated entity by described overlay film between skeleton and the skeleton of described proximal part of described distal end.
Linked into an integrated entity by described filament between skeleton and the skeleton of described proximal part of described distal end.
The skeleton of described distal end includes the multiple corrugated first filament circle turned to by described filament, and described first filament
It is integrally connected into tubular structure by filament between circle.
Multiple described first filament circles and connect the described filament of multiple described first filament circle by same filament coiling
Become.
The skeleton of described distal end includes the multiple corrugated first filament circle turned to by described filament, described first filament circle
It is integrally connected into tubular structure by described overlay film.
Being nested with crest with crest between adjacent two described first filament circles, the mode that trough and trough are nested is arranged.
By filament phase between first filament circle described in adjacent with on one end that described proximal part is connected the two of described distal end
Even.
Described proximal part is provided with in the described window stretching into described aortic windowing overlay film frame, and the extension cluster parachute in softened state
Portion.
The distraction angle in described extension cluster parachute portion is less than 90 ° more than 30 °.
Skeleton at described proximal part is the rhombus net grating texture become by a filament interlaced helical.
Skeleton at described proximal part includes multiple corrugated second filament circle, and connects adjacent two described second filament circles
Connecting filament, each described second filament circle is formed by a filament coiling.
In described tubular armature, the filament wound at described proximal part is more intensive than the filament wound at described distal end.
In described tubular armature, the diameter of described filament at described proximal part is bigger than the diameter of the described filament at described distal end.
The material of the described filament at described proximal part is harder than the material of the described filament at described distal end.
Described filament is tinsel.
Described material wiry is Nitinol, rustless steel or titanium.
The technique scheme of the present invention has the advantage that compared to existing technology
(1), in the aortic windowing branch overlay film frame of the present invention, comprise the tubular armature turned to by filament, and cover
Forming the overlay film of perisporium in described tubular armature, the proximal part of described tubular armature is suitably inserted into the window of aortic windowing overlay film frame
In mouthful, connecting with described aortic windowing overlay film frame, the distal end of described tubular armature is suitably inserted in branch vessel, and institute
The described proximal part stating tubular armature is harder than distal end.The aortic windowing branch overlay film frame of the present invention, the nearly heart of tubular armature
Holding harder than distal end, when distal end inserts in branch vessel, owing to the quality of distal end is soft, compliance is good, antitorque
Knot, it is possible to comply with the tortuous of laminating branch vessel, effectively prevent the damage to branch vessel；After distal end inserts branch vessel,
Time in the window of proximal part insertion aortic windowing overlay film frame, owing to the quality of proximal part is harder, branch's overlay film can be made to prop up
Frame closely cooperates with aortic windowing overlay film frame, obtains preferable sealing effectiveness, prevents the generation of internal hemorrhage due to trauma.Additionally, the present invention
Aortic windowing branch overlay film frame, may be used for thoracic aorta branch vessel, it is also possible to for ventral aorta etc. other actively
The branch vessel of arteries and veins, the most one-body molded with aortic stents compared to existing aortic windowing branch overlay film frame, and can only
For thoracic aorta branch vessel or be only used for ventral aorta branch vessel, the range of application of the present invention is quite varied.
(2), in the aortic windowing branch overlay film frame of the present invention, the diameter of described proximal part is bigger than the diameter of described distal end.
It is due to when aortic windowing overlay film frame windowing, the most unimpeded for ensureing between aortic windowing overlay film frame and branch vessel,
That would generally be opened by window is bigger than normal, and what the diameter of branch vessel determined that, so after distal end inserts in branch vessel,
Proximal part diameter is bigger than distal end diameter, and beneficially branch's overlay film frame closely cooperates with aortic windowing overlay film frame, obtains relatively
Good sealing effectiveness, prevents the generation of internal hemorrhage due to trauma.
(3), in the aortic windowing branch overlay film frame of the present invention, the skeleton of described distal end includes being turned to by described filament
Multiple corrugated first filament circles, and it is integrally connected into tubular structure by filament between described first filament circle.So make
Multiple described first filament circles the most connected into an entirety by filament before covering overlay film, had more preferable kink resistance,
Can effectively prevent again inaccessible.
(4) in the aortic windowing branch overlay film frame of the present invention, multiple described first filament circles and connect multiple described first
The described filament of filament circle is formed by same filament coiling.A piece filament coiling, not only simplify manufacturing process, has more
Good pliability can preferably comply with the tortuous of laminating branch vessel, effectively prevents the damage to branch vessel.
(5) in the aortic windowing branch overlay film frame of the present invention, with crest and crest between adjacent two described first filament circles
Being nested, the mode that trough and trough are nested is arranged.So the arbitrary cross section making described distal end there is filament, in telecentricity
While the compliance that end possesses, also ensure that toughness and the support performance of distal end so that distal end can prop up branch vessel,
Antitorque knot, effectively prevents between aortic windowing overlay film frame and branch vessel, and the obturation again of branch vessel.
(6) in the aortic windowing branch overlay film frame of the present invention, described connector is filament, described first filament circle and described
Connector is formed by same filament coiling.So make multiple described first filament circle the most by one before covering overlay film
Root filament is coiled into an entirety, has more preferable pliability and kink resistance, it is possible to preferably comply with the tortuous of laminating branch vessel,
Effectively prevent the damage to branch vessel and inaccessible again.
(7) in the aortic windowing branch overlay film frame of the present invention, on one end being connected with described proximal part of described distal end
Adjacent two described in be connected by filament between the first filament circle.The of this one end being connected with proximal part at distal end
The mode using filament to connect between one filament circle, both can ensure that distal end had near proximal part position and had preferably connected effect
Really, it is also possible to the suitable compliance ensureing distal end.
(8), in the aortic windowing branch overlay film frame of the present invention, described proximal part is provided with and stretches into described aortic windowing overlay film and prop up
In the described window of frame, and the extension cluster parachute portion in softened state.Described extension cluster parachute portion, can make described aortic windowing branch
Overlay film frame is firmly connected with described aortic windowing overlay film frame, fits tightly, and significantly reduces and leaks from both connecting portions
Blood or the risk of obturation, and the situation that described branch vessel pathological changes is more serious can be effectively applied to.
(9), in the aortic windowing branch overlay film frame of the present invention, the skeleton at described proximal part is by a filament interlaced helical
The rhombus net grating texture become.The forming degree of this structure is good, can make described proximal part and described aortic windowing overlay film frame
Window preferably coordinate.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below according to the specific embodiment of the present invention and combine accompanying drawing,
The present invention is further detailed explanation, wherein
Fig. 1 is the structural representation of the aortic windowing branch overlay film frame of embodiment 1；
Fig. 2 is the schematic diagram that the aortic windowing branch overlay film frame of embodiment 1 is arranged in branch vessel；
Fig. 3 is a kind of distressed structure schematic diagram of the aortic windowing branch overlay film frame of embodiment 1；
Fig. 4 is the structural representation that embodiment 2 extends the aortic windowing branch overlay film frame arranged down in cluster parachute portion；
Fig. 5 is the schematic diagram that embodiment 2 aortic windowing branch overlay film frame is arranged in branch vessel；
Fig. 6 is the structural representation that embodiment 2 extends the upwardly disposed aortic windowing branch overlay film frame in cluster parachute portion.
In figure, reference is expressed as: 1-tubular armature, 11-the first filament circle, and 12-the second filament circle, 100-aortic windowing divides
Propping up overlay film frame, 2-overlay film, 3-proximal part, 4-distal end, 5-aortic windowing overlay film frame, 6-extends cluster parachute portion, and 7-is actively
Arteries and veins, 8-branch vessel, 9-connectivity part, 10-connects filament.
Detailed description of the invention
Below with reference to accompanying drawing, use following example that the present invention is further elaborated.
Embodiment 1
Refering to Fig. 1 and Fig. 2, a kind of aortic windowing branch overlay film frame 100, comprise the tubular armature 1 turned to by filament,
And covering the overlay film 2 forming perisporium in described tubular armature 1, the proximal part 3 of described tubular armature 1 is suitably inserted into actively
Arteries and veins window overlay film frame 5 window in, connect with described aortic windowing overlay film frame 5, the distal end of described tubular armature 1
4 are suitably inserted in branch vessel 8, and the described proximal part 3 of described tubular armature 1 is harder than distal end 4.Described tubular armature 1
Proximal part 3 and distal end 4 link together by covering the overlay film 2 forming perisporium in described tubular armature 1.
The aortic windowing branch overlay film frame 100 of the present invention when operation insert can be there to be following two mode:
The first: carrier (not shown) is enclosed within outside aortic windowing branch overlay film frame 100, by carrier from aorta
7 and the connectivity part 9 of branch vessel 8 enter branch vessel 8, wherein distal end 4 is introduced into, and proximal part 3 subsequently enters, until
Proximal part 3 near connectivity part 9 and in mating connection with the window of aortic windowing overlay film frame 5 time, take out carrier, complete
The operation of aortic windowing branch overlay film frame 100 is inserted.
The second: carrier is enclosed within outside aortic windowing branch overlay film frame 100, by carrier from branch vessel 8 away from master
One end of tremulous pulse 7 enters branch vessel 8, moves aortic windowing branch overlay film frame 100 towards aorta 7, until proximal part
3 near connectivity part 9 and in mating connection with the window of aortic windowing overlay film frame 5 time, take out carrier, complete aorta
The operation of branch's overlay film frame 100 of windowing is inserted.
The aortic windowing branch overlay film frame 100 of the present invention applies to intravascular stent field, by aortic windowing branch being covered
The proximal part 3 of membrane support 100 inserts in the window of aortic windowing overlay film frame 5, connects with aortic windowing overlay film frame 5,
And distal end 4 is inserted in branch vessel 8, when aorta 7 pathological changes is involved or during neighbouring branch vessel 8, can be by actively
Arteries and veins branch's overlay film frame 100 of windowing is to avoid branch vessel 8 to be blocked, and then keeps the function of branch vessel 8.
The aortic windowing branch overlay film frame 100 of the present invention, the proximal part 3 of tubular armature 1 is harder, in telecentricity than distal end 4
Time in end 4 insertion branch vessel 8, owing to the quality of distal end 4 is soft, compliance is good, antitorque knot, it is possible to comply with patch
Close the tortuous of branch vessel, effectively prevent the damage to branch vessel；After distal end 4 inserts branch vessel 8, proximal part is inserted
When entering in the window of aortic windowing overlay film frame 5, owing to the quality of proximal part 3 is harder, can make branch's overlay film frame with
Aortic windowing overlay film frame closely cooperates, and obtains preferable sealing effectiveness, prevents the generation of internal hemorrhage due to trauma.
Additionally, the aortic windowing branch overlay film frame 100 of the present invention, may be used for thoracic aorta branch vessel, it is also possible to use
In the branch vessel of other aortas such as ventral aorta, and aorta usual compared to existing aortic windowing branch overlay film frame
Support is one-body molded, and is only used for thoracic aorta branch vessel or is only used for ventral aorta branch vessel, and the present invention's should
Quite varied by scope.
Described overlay film 2 can cover at described tubular armature 1 outer surface, it is also possible to covers at described tubular armature 1 inner surface,
Described overlay film 2 can also be all covered at the surfaces externally and internally of described tubular armature 1.In the present embodiment, the most described overlay film 2 covers
Cover outside described tubular armature 1.The diameter of described proximal part 3 is bigger than the diameter of described distal end 4.Due at aortic windowing
During overlay film frame windowing, the most unimpeded for ensureing between aortic windowing overlay film frame and branch vessel 8, it will usually window is opened
Bigger than normal, and what the diameter of branch vessel 8 determined that, so after distal end 4 inserts in branch vessel 8, proximal part
3 diameters are bigger than distal end 4 diameter, and beneficially branch's overlay film frame closely cooperates with aortic windowing overlay film frame, obtain preferably
Sealing effectiveness, prevent the generation of internal hemorrhage due to trauma.
In the present embodiment, connected into by described overlay film 2 between skeleton and the skeleton of described proximal part 3 of described distal end 4
Integrally.
As deformation, it is also possible to be, between skeleton and the skeleton of described proximal part 3 of described distal end 4 by described filament even
It is connected into one.
The skeleton of described distal end 4 includes the multiple corrugated first filament circle 11 turned to by described filament, and described first
It is integrally connected into tubular structure by filament between filament circle 11.Multiple described first filament circle 11 is so made to cover overlay film
The most connected into an entirety by filament before 2, there is more preferable kink resistance, it is possible to effectively prevent again inaccessible.
Multiple described first filament circles 11 and connect the described filament of multiple described first filament circle 11 by same filament around
System forms.A piece filament coiling, not only simplify manufacturing process, has more preferable pliability and can preferably comply with laminating branch
Blood vessel tortuous, effectively prevents the damage to branch vessel.
As deformation, the skeleton of described distal end 4 includes the multiple corrugated first filament circle 11 turned to by described filament,
Described first filament circle 11 is integrally connected into tubular structure by described overlay film 2.
Further, it is nested with crest with crest between adjacent two described first filament circles 11, the mode that trough and trough are nested
Arrange.So the arbitrary cross section making described distal end 4 there is is filament, while the compliance that distal end 4 possesses,
Also ensure that toughness and the support performance of distal end 4 so that distal end 4 can prop up branch vessel 8, antitorque knot is the most anti-
Only between aortic windowing overlay film frame and branch vessel 8, and the obturation again of branch vessel 8.
Can also further on one end being connected with described proximal part 3 of described distal end 4 adjacent two described in the first filament
It is connected by filament between circle 11.This first filament circle 11 in one end being connected with proximal part 3 of distal end 4 it
Between use filament connect mode, both can ensure that distal end 4 had near proximal part 3 position and preferably connected effect, also
The compliance of guarantee distal end 4 that can be suitable.
Described proximal part 3 is provided with in the described window stretching into described aortic windowing overlay film frame 5, and the extension in softened state
Cluster parachute portion 6.Described extension cluster parachute portion 6, can make described aortic windowing branch overlay film frame 100 and described aortic windowing overlay film
Support 5 firmly connects, fits tightly, and easy to operate, effective fixing prevents branch stent from coming off, and significantly reduces from both
Connecting portion internal hemorrhage due to trauma, leakage blood or the risk of obturation, and the situation that described branch vessel pathological changes is more serious can be effectively applied to.
Specifically, the distraction angle in described extension cluster parachute portion 6 is less than 90 ° more than 30 °.
Skeleton concrete structure at described proximal part 3, the present embodiment is preferred, a filament interlaced helical rhombus net trellis become
Structure, refering to Fig. 1, the forming degree of this structure is good, can make the window of described proximal part and described aortic windowing overlay film frame
Mouth preferably coordinates.
As deformation, as it is shown on figure 3, the skeleton concrete structure at described proximal part 3, it is also possible to be include multiple corrugated
Second filament circle 12, and connect the connection filament 10 of adjacent two described second filament circles 12, each described second filament circle 12
Formed by a filament coiling.It is nested with crest with crest between two the most adjacent described second filament circles 2, and at crest
Place is connected by described connection filament 10, and trough is nested with trough, and the side connected by described connection filament 10 at described trough
Formula is arranged, the material of described connection filament is identical with the material of described filament.
The specific implementation that the described proximal part 3 of described tubular armature 1 is harder than distal end 4 has multiple, such as can be by changing
Become filament diameter, the filament wound number of turns and the material etc. of filament at proximal part 3 and distal end 4 liang.Concrete it may be that described
In tubular armature 1, the diameter of described filament at described proximal part 3 is bigger than the diameter of the described filament at described distal end 4.
Can also further, in described tubular armature 1, the described filament at described proximal part 3 is than the institute at described distal end 4
State filament wound intensive.
Or, the most described filament is tinsel, and described material wiry is usually Nitinol, rustless steel or titanium, therefore
Filament material at described distal end 4 can be elected as elastic preferable, the Nitinol that hardness is less, and by described proximal part 3
The filament material at place elects the bigger rustless steel of hardness or titanium as.Certainly, described at described distal end 4 and described proximal part 3
The material of filament is not limited to the situation in the example above, if only carrying out shape by the change of distal end 4 and proximal part 3 material
Become the nonhomogeneous hardness at described distal end 4 and described proximal part 3, as long as meeting the material of the described filament at described proximal part 3
Harder than the material of the described filament at described distal end 4, all should be within the scope of the present invention.
In the present embodiment, the described filament wound number of turns at the most described proximal part 3 is than the described filament at described distal end 4
The winding number of turns is many, and the filament material of described proximal part 3 and described distal end 4 the most all selects the NiTi that good springiness, hardness are moderate
Alloy.
Embodiment 2
As Figure 4-Figure 6, the present embodiment is substantially the same with embodiment 1, and difference is: described tubular armature 1 described
The diameter of proximal part 3 and the equal diameters of described distal end 4.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.For institute
For the those of ordinary skill in genus field, can also make other changes in different forms on the basis of the above description.
Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or variation are still located
Among the protection domain of the invention.
Claims (19)
1. an aortic windowing branch overlay film frame, comprises the tubular armature (1) turned to by filament, and covers in institute
State the upper overlay film (2) forming perisporium of tubular armature (1), it is characterised in that: the proximal part (3) of described tubular armature (1) is fitted
Close in the window inserting aortic windowing overlay film frame (5), connect with described aortic windowing overlay film frame (5), described pipe
The distal end (4) of shape skeleton (1) is suitably inserted in branch vessel (8), and the described proximal part of described tubular armature (1)
(3) harder than distal end (4).
Aortic windowing branch the most according to claim 1 overlay film frame, it is characterised in that: described proximal part (3)
Diameter is bigger than the diameter of described distal end (4).
Aortic windowing branch the most according to claim 1 overlay film frame, it is characterised in that: described proximal part (3) with
The joint of described distal end (4) is tiltedly to take on transition.
4. according to the aortic windowing branch overlay film frame according to any one of claim 1-3, it is characterised in that: described far
Linked into an integrated entity by described overlay film (2) between skeleton and the skeleton of described proximal part (3) of heart end (4).
5. according to the aortic windowing branch overlay film frame according to any one of claim 1-3, it is characterised in that: described far
Linked into an integrated entity by described filament between skeleton and the skeleton of described proximal part (3) of heart end (4).
6. according to the aortic windowing branch overlay film frame according to any one of claim 1-5, it is characterised in that: described far
The skeleton of heart end (4) includes the multiple corrugated first filament circle (11) turned to by described filament, and described first filament
It is integrally connected into tubular structure by filament between circle (11).
Aortic windowing branch the most according to claim 6 overlay film frame, it is characterised in that: multiple described first filaments
Circle (11) and connect the described filament of multiple described first filament circle (11) and formed by same filament coiling.
8. according to the aortic windowing branch overlay film frame according to any one of claim 1-5, it is characterised in that: described far
The skeleton of heart end (4) includes the multiple corrugated first filament circle (11) turned to by described filament, described first filament circle
(11) it is integrally connected into tubular structure by described overlay film (2).
9. according to the aortic windowing branch overlay film frame according to any one of claim 6-8, it is characterised in that: adjacent two
Being nested with crest with crest between individual described first filament circle (11), the mode that trough and trough are nested is arranged.
10. according to the aortic windowing branch overlay film frame according to any one of claim 6-8, it is characterised in that: described far
By thin between first filament circle (11) described on one end being connected with described proximal part (3) of heart end (4) adjacent two
Silk is connected.
11. according to the aortic windowing branch overlay film frame according to any one of claim 1-9, it is characterised in that: described closely
Heart end (3) is provided with in the described window stretching into described aortic windowing overlay film frame (5), and the extension cluster parachute in softened state
Portion (6).
12. aortic windowing branch according to claim 10 overlay film frames, it is characterised in that: described extension cluster parachute portion (6)
Distraction angle more than 30 ° less than 90 °.
13. according to the aortic windowing branch overlay film frame according to any one of claim 1-12, it is characterised in that: described closely
The skeleton at heart end (3) place is the rhombus net grating texture become by a filament interlaced helical.
14. according to the aortic windowing branch overlay film frame according to any one of claim 1-12, it is characterised in that: described closely
The skeleton at heart end (3) place includes multiple corrugated second filament circle (12), and connects adjacent two described second filament circles (2)
Connection filament (10), each described second filament circle (2) is formed by a filament coiling.
15. according to the aortic windowing branch overlay film frame according to any one of claim 1-14, it is characterised in that: described pipe
The described filament wound at upper described proximal part (3) place of shape skeleton (1) is more intensive than the described filament wound at described distal end (4) place.
16. according to the aortic windowing branch overlay film frame according to any one of claim 1-15, it is characterised in that: described pipe
The diameter of the described filament at upper described proximal part (3) place of shape skeleton (1) is than the diameter of the described filament at described distal end (4) place
Greatly.
17. according to the aortic windowing branch overlay film frame according to any one of claim 1-16, it is characterised in that: described closely
The material of the described filament at heart end (3) place is harder than the material of the described filament at described distal end (4) place.
18. according to the aortic windowing branch overlay film frame according to any one of claim 1-17, it is characterised in that: described carefully
Silk is tinsel.
19. aortic windowing branch according to claim 18 overlay film frames, it is characterised in that: described material wiry
For Nitinol, rustless steel or titanium.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610374250.0A CN105943199A (en) | 2016-05-31 | 2016-05-31 | Aortic windowing branch covered stent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610374250.0A CN105943199A (en) | 2016-05-31 | 2016-05-31 | Aortic windowing branch covered stent |
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| CN105943199A true CN105943199A (en) | 2016-09-21 |
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| CN201610374250.0A Pending CN105943199A (en) | 2016-05-31 | 2016-05-31 | Aortic windowing branch covered stent |
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Application publication date: 20160921 |