CN204293309U - A kind of stent graft - Google Patents
A kind of stent graft Download PDFInfo
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- CN204293309U CN204293309U CN201420677817.8U CN201420677817U CN204293309U CN 204293309 U CN204293309 U CN 204293309U CN 201420677817 U CN201420677817 U CN 201420677817U CN 204293309 U CN204293309 U CN 204293309U
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- stent
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- body rack
- branch stent
- connector
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Abstract
The utility model relates to technical field of medical instruments, specifically refer to the stent graft with branch stent being used for the treatment of arterial disease, comprise main body rack and branch stent, the inner chamber that described main body rack and branch stent have near-end, far-end respectively and be located between described near-end and far-end, described main body rack is provided with opening, and main body rack is connected by connector with branch stent; Described connector have the bottom be connected on opening, can the top of movable opening and the connection inner chamber that is located between described bottom and top; The near-end of described branch stent is connected to the top of connector.The beneficial effects of the utility model are the improvement the stent graft being used for the treatment of vascular diseases, there is adaptability widely, without the need to customization, completing the reparation of multiple bifurcated artery when treating arterial disease, avoid secondary or repeatedly implantable intravascular support, simplify operating difficulty.
Description
Technical field
The utility model relates to technical field of medical instruments, specifically refers to the stent graft with branch stent being used for the treatment of arterial disease.
Background technology
In aorta lumen, prosthesis development rapidly, and the field of application is more and more wider, and the support being generally used for minimally-invasive treatment is divided into window type support, branching type support, inserted support and dendritic support.
After the release of window type support, along with beating of artery, its situation that may produce and misfit with bifurcated artery perforate of windowing, cause bifurcated artery Intermittent ischemia, and then occur the thrombosis of artery, and blood flow is through perforate, part-blood liquid may be had and flow to original lesion, make the lesion region of blood flow constant impingement artery, pathology is sustainable development still, operative failure.The necessary custom design of integration branching type support, the customization time is long, and this type of conditions of patients is how very urgent, patient cannot obtain the support needed at short notice, and complex operation during operation enforcement, only accomplish single branch stent so far, due to designing technique restriction, do not implement the clinical of multiple-limb support.The defect of inserted support has: do not possess broad applicability equally, tube chamber outward part protrudes from straight pipe type overlay film frame, outlet may be covered when running into the haemocoele of normal blood vessels, cause corresponding artery cannot blood supply or corresponding organs, organ ischemic even downright bad, complicated operation when later stage implements, can not guarantee by preoperative plan implement smoothly (as: branch stent can not be implanted by preoperative plan, thus cause bifurcated artery obturation, can not blood supply).Dendritic support separates many supports by one end of a larger overlay film main body rack and main body rack is formed by connecting, it places complicated operation, support is difficult to discharge in the narrow tube chamber of limitation, and hemodynamic change is comparatively large, causes indication very narrow.
Application number is " 201220044025.8 ", Authorization Notice No. is " CN 203354689 U ", name is called that the Chinese utility model patent of " chamber arteria covering membrane supporter " discloses a kind of intracavity stent graft, cylindrical stent is formed by rigid support and stitching or the artificial blood vessel be bonded in inside support, the surface of cylindrical stent there is depression, at least one is had to export in depression, on cylindrical stent inwall, horizontal interior wall is fixed with the tubular branch chamber of band film, the one end in tubular branch chamber is placed in cylindrical stent, the other end is connected with the outlet on cylindrical stent surface, the quantity in tubular branch chamber is identical with depression inner outlet quantity.When implementing this utility model, first the tubular support model of appropriate size is selected, pathology artery is delivered to by loading induction system after tubular support compression, recess respective branches artery also discharges, tubular support automatically reverts to original state and is close to pathology artery under screen resilience effect, recess is because having confession haemocoele passage the same number of with corresponding bifurcated artery therefore ischemic can not occurring, and after main body rack release, again by implant sufficient length, with the overlay film sub-stent in branch chamber to corresponding bifurcated artery, thus reach isolation effect.But this design belongs in fact the one of inserted support, the defect of its design is: 1, the segment dislocation certain angle of overlay film sub-stent and cylindrical stent, and the blood flow from near-end impacts the displacement at a specified future date that may cause cylindrical stent and overlay film sub-stent; 2, the blood flow in branch vessel is by the blood flow direction following current of flowing out in arteries, because the one end in cast branch chamber is placed in cylindrical stent, the other end is connected with the outlet on cylindrical stent surface, so when the later stage inserts overlay film sub-stent, the overlay film sub-stent of Puncture approach must be carried with countercurrent direction, and the port of overlay film sub-stent must export and distributes to establishing with depression, can increase difficulty and the risk of operation like this.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, the stent graft with branch stent of provide a kind of effective location, ensure bifurcated artery blood supply, avoid secondary implantable intravascular support, simplify operating difficulty and risk.
In order to achieve the above object, the utility model provides a kind of stent graft, comprise main body rack and branch stent, the inner chamber that described main body rack and branch stent have near-end, far-end respectively and be located between described near-end and far-end, described main body rack is provided with opening, and main body rack is connected by connector with branch stent;
Described connector have the bottom be connected on opening, can the top of movable opening and the connection inner chamber that is located between described bottom and top;
The near-end of described branch stent is connected to the top of connector.
Preferably, the far-end of described branch stent is provided with at least one annular element, and the diameter of the diameter≤opening of annular element, branch stent is set in connector.Annular element ensure that branch stent can pass in and out the opening of main body rack smoothly effectively.
Preferably, sheathed connector and branch stent successively in described main body rack.
Preferably, described main body rack is provided with at least one depression, is provided with at least one opening in described depression.Main body rack is delivered to along guide wire and needs treatment position, after depression respective branches artery, release launches main body rack, prevent from causing because Endovascular main body rack loosens displacement cover branch vessel mouth, corresponding artery cannot the even downright bad situation of blood supply or corresponding organs, organ ischemia occur.
Preferably, the cross section of described depression can be circular, oval, " D " shape or other arbitrary shapes, the shape size of depression can coordinate the concrete angle between sustainer and bifurcated artery, aortic disease position the factor such as position and set.
Preferably, the far-end of described branch stent, opening and depression are respectively equipped with metal marker point, metal marker point is convenient to main body rack and branch stent in endovascular location and observation, is conducive to the enforcement of performing the operation.
Preferably, described metal marker point is located on the junction ultimate range end of the diameter two ends of branch stent far-end, the diameter two ends of opening, depression and main body rack respectively.
Preferably, described main body rack and branch stent comprise supporter and the surface being connected described supporter respectively, described supporter is made up of telescopic shape-memory material, and described surface is made up of the graft material being applicable to implant into body blood vessel, and described supporter has elastic construction.
Preferably, the caliber minimum of a value of the supporter of described main body rack is greater than the caliber maximum summation of one or more branch stent supporter, namely stent graft is under compression or release conditions, the caliber of main body rack supporter is greater than the summation of the caliber of the branch stent supporter of same sectional area, is set in main body rack to realize branch stent.
Preferably, described surface can connect supporter by methods such as bonding, stitching, coverings.
Preferably, described supporter is in expansion process, and its cross section can be roughly the same with the shape size of the cross section of blood vessel to be repaired, and also the cross section of comparable blood vessel to be repaired is bigger, to play the fixing effect of friction.
Preferably, described supporter can be heat treatment stainless steel, Nitinol, spring steel wire, acetal copolymer compound, or other extensile have a shape memory or flexible material compositions.
Preferably, described supporter can be have sine wave, zigzag, rhombus, or the circumference tubular structure of other structures.At the operation initial stage, stent graft is extruded loading, saves space, is convenient to main body rack and is delivered to treatment position in a minimally invasive manner.
Preferably, blood hole is laid on the surface of described branch stent, can promote blood hole position branch stent by seal wire.
Preferably, the aperture≤0.035inch in described saturating blood hole, ensures that blood can pass through saturating blood hole smoothly.Meanwhile, select the seal wire not easily passing through described blood hole, and select the seal wire of diameter > 0.035inch to promote blood hole, complete the promotion to branch stent, release and positioning work.
Preferably, described connector is the tubular structure of scalable turnover, is made up of the graft material of applicable implant into body blood vessel.
Preferably, described annular element is made up of absorbable material, also can be made up of the material of releasable or release.After stent graft implant into body blood vessel, cut off annular element, branch stent launched completely, and due to annular element be absorbable material, therefore can not to have an impact to the enforcement of stent graft and human body.
Preferably, the surface of described main body rack, the surface of branch stent and connector are integral type structure.
Preferably, the graft material of described applicable implant into body blood vessel can be braided polymer, polytetrafluoroethylene (PTFE), polyurethane, silicones, terylene, or other suitable materials.
Preferably, described stent graft is after it launches, and the near-end of branch stent, the diameter of far-end are consistent, and consistent diameter has effectively isolated diseased region, and prevents that blood flow from falling, the situation of adverse current occurs.
Preferably, the structure that is interconnected is formed between the connection chamber of the inner chamber of described main body rack, the inner chamber of branch stent and connector.
The beneficial effects of the utility model are the improvement the stent graft being used for the treatment of vascular diseases, make the support of implantable intravascular can effective location, at isolation arterial disease position and blood flow, bifurcated artery blood supply is ensured under suppressing the prerequisite of pathology, and avoid secondary or repeatedly implantable intravascular support, under disposable complete Wicresoft, idealized solution is with the reconstructing blood vessel of arterial disease, solve bifurcated artery short time not blood supply when branch stent discharges, simplify operating difficulty, there is adaptability widely, without the need to customization, the reparation of multiple bifurcated artery is completed when treating arterial disease.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of main body rack in the utility model.
Fig. 3 is the structural representation of branch stent in the utility model.
Fig. 4 is the structural representation in the utility model after branch stent expansion.
Fig. 5 is another example arrangement schematic diagram of the present utility model.
Fig. 6 is the structural representation after the utility model pushes to target location.
Wherein:
1-main body rack 2-branch stent
3-opening 4-connector
The saturating blood hole of 5-annular element 6-
7-depression 8-metal marker point
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
In the utility model, term " bottom ", " top " are based on position relationship shown in the drawings, only the utility model and simplified characterization for convenience of description, instead of the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
For stent graft, term " near-end " is the part by means of the closer aortic heart valve of blood flow path, and " far-end " is compared with the part away from aortic heart valve by means of blood flow path.
Embodiment 1:
A kind of stent graft as shown in Fig. 1 ~ Fig. 5, comprise main body rack 1, branch stent 2 and connector 4, the inner chamber that wherein said main body rack 1 and branch stent 2 have near-end, far-end respectively and be located between described near-end and far-end, the connection inner chamber that described connector 4 has bottom, top and is located between described bottom and top.
Formed between the connection chamber of the inner chamber of described main body rack 1, the inner chamber of branch stent 2 and connector 4 and to be interconnected structure, main body rack 1 is connected by connector 4 with branch stent 2, sheathed connector 4 and branch stent 2 successively in main body rack 1, wherein:
Be provided with depression 7 in main body rack 1, the cross section of depression 7 is oval;
Opening 3 is provided with in depression 7;
The bottom of connector 4 is connected on opening 3, and the top of connector 4 can movable opening 3;
The near-end of branch stent 2 is connected to the top of connector 3.
The surface of described branch stent 2 is provided with blood hole 6, and the aperture in saturating blood hole 6 is 0.03inch, can promote blood hole position branch stent by seal wire.
The far-end of branch stent 2 is provided with the annular element 5 be made up of absorbable material, the diameter of described annular element 5 is less than the diameter of opening 3, effectively ensure that branch stent 2 can pass in and out the opening of main body rack 1 smoothly, when after stent graft human vas inwall, cut off annular element 5, branch stent 2 is launched completely, because annular element 5 is absorbable material, therefore can not have an impact to the enforcement of stent graft and human body.
The diameter two ends of branch stent 2 far-end, the diameter two ends of opening 3, depression 7 and main body rack 1 junction ultimate range end on be respectively equipped with metal marker point 8.Described metal marker point 8 is convenient to main body rack 1 and branch stent 2 in endovascular location.
Main body rack 1 and branch stent 2 comprise supporter respectively and are bonded in the surface on described supporter, wherein supporter is made up of telescopic shape-memory material, and the surface of main body rack 1 and branch stent 2 forms by the graft material of applicable implant into body blood vessel.
The caliber minimum of a value of the supporter of main body rack 1 is greater than the caliber minimum of a value of branch stent 2 supporter, namely stent graft under compression, the caliber of main body rack 1 supporter is greater than the caliber of branch stent 2 supporter, is set in main body rack 1 to realize branch stent 2.
Connector 4 is telescopic tubular structure, is made up of the graft material of applicable implant into body blood vessel; The surface of main body rack 1, the surface of branch stent 2 and connector 4 are integral type structure.
Stent graft is after it launches, and the near-end of branch stent 2, the diameter of far-end are consistent, has effectively isolated diseased region and the situation preventing blood flow from flowing backwards generation.
Actual clinical example
When pathology being involved or carries out Endovascular operation close to bifurcated artery (as coronary artery, innominate artery, LCC, left subclavian artery, coeliac trunk artery, superior mesenteric artery, the arteria renalis, arteria iliaca communis, internal iliac artery etc.), relate to innominate artery, LCC, left subclavian artery for pathology, existing operating procedure is:
Conventional method: after general anesthesia, chest is opened in center, separation appears sustainer and auricle, and conventional junctor outer circulation, gets branching type artificial blood vessel, after sewing up aorta ascendens, innominate artery, left neck sustainer, left subclavian artery respectively, artificial blood vessel and descending aorta are carried out coincideing and recovers sustainer blood supply.
Invasive methods: after anesthesia comes into force, appear side femoral artery,common, the success of puncture needle retrograde puncture femoral artery,common, introduces 6F catheter sheath group, and introduce pigtail catheter and be placed in sustainer, high pressure injector is through the clear and definite diseased region of pigtail catheter radiography.
Select the stent graft of applicable size to be directed into aorta ascendens through femoral artery,common, the proximally-located of stent graft is in the relative normal region of aorta ascendens structure; Stent graft exceedes main body rack through bilateral arteria brachialis and the retrograde incision of left neck artery or the introducing aorta ascendens near-end that punctures successively, and discharge rapidly innominate artery, left neck artery, left subclavian artery support while of release main body rack, art is complete
Again import radiography pigtail catheter and be placed in sustainer, high pressure injector, through pigtail catheter radiography, specifies backing positions; Innominate artery, LCC, left subclavian artery blood supply situation; Lesion vessels repairs situation; Leakage situation in support.As branch stent far-end has interior leakage or the fixing not good enough capable conventional far-end of overlay film frame of selecting to repair.
Confirm that surgical effect sews up femoral artery bilateral arteria brachialis and carotid puncture point and otch after good respectively.
Art finishes.
The utility model implementation method: after anesthesia comes into force, appear side femoral artery,common, after the success of puncture needle retrograde puncture femoral artery,common, introduce 6F catheter sheath group, introduce pigtail catheter and be placed in sustainer, high pressure injector is through the clear and definite diseased region of pigtail catheter radiography.
Select the utility model of applicable size to import lesion locations through seal wire, utilize metal marker point 8 locating recesses 7 in large curved side, main body rack 1 proximally-located discharges rapidly behind aorta ascendens structure normal region.
By seal wire by femoral artery sheath laggard enter in main body rack 1, by entering innominate artery and left subclavian artery successively after annular element 5 and opening 3, import along seal wire and push conduit head end to annular element 5 place, propelling movement conductor housing is continued pushing belt along seal wire and moves annular element 5 by opening 3 place, branch stent 2 moves ahead along seal wire simultaneously, until connector 4 all overturns or turns down the outside to main body rack 1, release annular element 5, makes the far-end of branch stent 2 launch completely and be fixed on innominate artery.
Same method guiding release left neck artery and left subclavian artery branch stent.
Wherein pigtail catheter radiography needs clear and definite: 1) backing positions; 2) innominate artery, LCC, left subclavian artery blood supply situation; 3) lesion vessels repairs situation; 4) leakage situation in support.
Insufficient or improperly can separately connect support as branch stent 2 has to fit with bifurcated artery and improve surgical effect, then radiography.
Sew up point of puncture, art finishes.
More than that the preferred embodiment that the utility model has been created is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art can also make all equivalent modification or replacement under the prerequisite without prejudice to the utility model creative spirit, and these equivalent modifications or replacement are all included in the application's claim limited range.
Claims (9)
1. a stent graft, comprise main body rack (1) and branch stent (2), the inner chamber that described main body rack (1) and branch stent (2) have near-end, far-end respectively and be located between described near-end and far-end, it is characterized in that: described main body rack (1) is provided with opening (3), and main body rack (1) is connected by connector (4) with branch stent (2);
Described connector (4) have the bottom be connected on opening (3), can the top of movable opening (3) and the connection inner chamber that is located between described bottom and top;
The near-end of described branch stent (2) is connected to the top of connector (4).
2. a kind of stent graft according to claim 1, it is characterized in that: the far-end of described branch stent (2) is provided with at least one annular element (5), the diameter of the diameter≤opening (3) of annular element (5), branch stent (2) is set in connector (4).
3. a kind of stent graft according to claim 1, is characterized in that: described main body rack (1) is provided with at least one depression (7), is provided with at least one opening (3) in described depression (7).
4. a kind of stent graft according to claim 1, is characterized in that: far-end, the opening (3) of described branch stent (2) and cave in (7) are respectively equipped with metal marker point (8).
5. a kind of stent graft according to claim 1, is characterized in that: described main body rack (1) comprises supporter and the surface being connected described supporter respectively with branch stent (2).
6. a kind of stent graft according to claim 1, is characterized in that: blood hole (6) is laid on the surface of described branch stent (2).
7. a kind of stent graft according to claim 1, is characterized in that: the tubular structure that described connector (4) is membranaceous scalable turnover.
8. a kind of stent graft according to claim 1, is characterized in that: described stent graft is after it launches, and the near-end of its branch stent (2), the diameter of far-end are consistent.
9. a kind of stent graft according to claim 1, is characterized in that: form the structure that is interconnected between the connection chamber of the inner chamber of described main body rack (1), the inner chamber of branch stent (2) and connector (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677817.8U CN204293309U (en) | 2014-11-13 | 2014-11-13 | A kind of stent graft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420677817.8U CN204293309U (en) | 2014-11-13 | 2014-11-13 | A kind of stent graft |
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| CN204293309U true CN204293309U (en) | 2015-04-29 |
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| CN201420677817.8U Active CN204293309U (en) | 2014-11-13 | 2014-11-13 | A kind of stent graft |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104367400A (en) * | 2014-11-13 | 2015-02-25 | 中国人民解放军第二军医大学 | Stent graft |
| CN108245279A (en) * | 2016-12-29 | 2018-07-06 | 先健科技(深圳)有限公司 | Overlay film frame |
| CN111407463A (en) * | 2020-03-19 | 2020-07-14 | 湖南埃普特医疗器械有限公司 | Covered stent system |
-
2014
- 2014-11-13 CN CN201420677817.8U patent/CN204293309U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104367400A (en) * | 2014-11-13 | 2015-02-25 | 中国人民解放军第二军医大学 | Stent graft |
| CN104367400B (en) * | 2014-11-13 | 2017-02-15 | 中国人民解放军第二军医大学 | Stent graft |
| CN108245279A (en) * | 2016-12-29 | 2018-07-06 | 先健科技(深圳)有限公司 | Overlay film frame |
| CN108245279B (en) * | 2016-12-29 | 2023-11-21 | 先健科技(深圳)有限公司 | Tectorial membrane support |
| CN111407463A (en) * | 2020-03-19 | 2020-07-14 | 湖南埃普特医疗器械有限公司 | Covered stent system |
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