A kind of arteria covering membrane supporterTechnical field
The utility model relates to the field of medical instrument technology more particularly to a kind of arteria covering membrane supporters.
Background technique
Existing aortic aneurysm, dissecting aneurysm of aorta belong to aorta common disease, and lethality is high.Both diseases at presentSick therapeutic modality is carried out with application overlay film frame based on endovascular graft." interior leakages " various in aorta tectorial membrane stent implantation,Stent migration phenomenon is two maximum difficult points of operation.
" interior leakage " is one of most common complication of intracavitary therapy aortic aneurysm, after referring to overlay film frame implantation, bloodThe intracavitary phenomenon of tumor still is continued to flow into via various approach, the reason is that failing to completely cut off tumor chamber and arterial blood completely after bracket releaseTraffic between stream.Interior leakage can lead to the still lasting increase after overlay film frame prosthetic of tumor chamber, final to rupture, and cause patient deadIt dies.Stent migration is also another common complication of arotic disease endovascular repair.Fail after bracket release according in the original planIt is effectively anchored on diseased region, position movement occurs, not only bracket is interfered to play effect, can also jeopardize point of artery sendingBranch.
Existing bracket is limited for " interior leakage " and the preventive means of " displacement ", and usually be easy to cause the wound to arterial wallEvil.For the abdominal aneurvsm of the nearly arteria renalis, the aneurysm of thoracic aorta of nearly subclavian artery, dissecting aneurysm, since tumor neck is short, tumorWall is fragile, and conventional overlay film frame prosthesis is extremely difficult, and applies the complexity such as branch stent, windowing stent, chimney technologyOperation, operating time is long, and success rate of operation is not high, and complication is relatively more.The sacrifice side kidney being also difficult to avoid that sometimes is dynamicArteries and veins sacrifices artery under left collarbone.
Summary of the invention
In order to solve the above technical problems, the bracket is in original the purpose of the utility model is to provide a kind of arteria covering membrane supporterCilium is increased on some arteria covering membrane supporters, cilium can reduce bracket with buffering stand to the compression of vascular wall at tumor neckStimulation to tumor neck；The bonded area and frictional force between overlay film frame and tumor neck can be increased, increase support stability, reducedStent migration incidence；It can make to combine more closely between bracket and tumor neck, prevent leakage in I type；The absorption of cilium is made simultaneouslyWith, mechanical overlap action and the effect for activating blood coagulation, bolt can be quickly caused in bracket periphery, the tumor chamber of quick thrombosis occurs eachThe risk leaked in type reduces rapidly.
The purpose of this utility model is realized by technical solution below:
A kind of arteria covering membrane supporter, comprising: overlay film frame section (7) and bare bracket section (6)；Overlay film frame section (7) packetInclude wavy annular wire (3), overlay film (4) and cilium (5)；
Wavy annular wire (3) includes multi-turn, and every circle is sequentially distributed along the axial direction of overlay film；
The cilium (5) is attached on wavy annular wire (3), and is attached to overlay film frame section (7) both ends annular goldThe cilium belonged on silk (3) is distributed in short and close state；Cilium on the endless metal silk (3) of overlay film frame section (7) interludeIn long, rarefaction state is distributed.
Compared with prior art, one or more embodiments of the utility model can have following advantage:
Buffering stand is uniformly distributed bracket to the compression of tumor neck the compression of vascular wall at tumor neck, reduces bracketStimulation to tumor neck；
Mechanical filling effect causes microcilium fine and close at tumor neck to make to combine more closely between bracket and tumor neck, prevents ILeakage in type；Increase the bonded area and frictional force between overlay film frame and tumor neck, keeps bracket more stable.
Using the suction-operated of cilium, mechanical overlap action and the effect for activating blood coagulation, bolt is quickly caused in bracket periphery, fastlyThe risk that various interior leakage occurs for the tumor chamber of fast thrombosis reduces rapidly.Microcilium is overlapped, staggeredly in aneurysm, can be in aneurysmFine and close grid (" scaffold ") is built at internal, tumor neck, effectively reduces the blood flow for flowing through Aneurysmal neck, while adsorbing blood plateletAnd blood coagulation substance, be conducive to form more stable thrombus in knurl and at tumor neck.Nylon and PGLA material passes through respectivelyThe activity that blood coagulation activity, induced tissue react, fast and stable cause bolt, effectively prevent various interior leakage.
Detailed description of the invention
Fig. 1 is arteria covering membrane supporter structural schematic diagram；
Fig. 2 is aneurysm structural schematic diagram；
Fig. 3 is the arrangement mode structural schematic diagram of cilium on bracket；
Fig. 4 is the winding of cilium and suture texture schematic diagram on bracket；
Fig. 5 is structural schematic diagram of the bracket in aneurysm of thoracic aorta；
Fig. 6 is structural schematic diagram of the bracket in abdominal aortic aneurysm；
Fig. 7 is the sectional view at tumor neck after bracket merging aneurysm；
Fig. 8 is the sectional view at knurl after bracket merging aneurysm.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below in conjunction with examples and drawings pairThe utility model embodiment is described in further detail.
It is arteria covering membrane supporter structure as shown in Figure 1, including the overlay film frame includes overlay film frame section 7 and bare bracket section6；The overlay film frame section includes wavy annular wire 3, overlay film 4 and cilium 5；
Wavy annular wire includes multi-turn, and every circle is sequentially distributed along the axial direction of overlay film；
The cilium 5 is attached on wavy annular wire 3 (as shown in Figure 3), and is attached to two end ring of overlay film frame sectionCilium on shape wire is distributed in short and close state；Cilium on the endless metal silk of overlay film frame section interlude in long andRarefaction state distribution.
The above-mentioned cilium length being attached on 7 both ends endless metal silk of overlay film frame section is 4-6mm；It is described to be attached to overlay filmCilium length on the endless metal silk of 7 interlude of brace sections is 10-15mm.
Edge and two terminal membrane edge of the overlay film frame section 7 are apart 5mm at above-mentioned cilium attachment.
The above-mentioned cilium 5 being attached on wavy annular wire 3 is fixed on described in a manner of winding and through fixing piece 8On wavy annular wire (as shown in Figure 4).
Fig. 2 is aneurysm structural schematic diagram.
As shown in Figure 5 and Figure 6, respectively overlay film frame 2 in aneurysm of thoracic aorta 1 and overlay film frame 2 in abdominal aortaThe structure of aneurysm 1.
Above-mentioned every circle wavy annular wire is opened along the radial elastic of overlay film, and multi-turn wavy annular wire and overlay filmIt is formed together a cylindric elastic structure.
Above-mentioned overlay film frame lower end and upper end are in the broadening formation or straight barrel type gradually expanded, and the naked branch in overlay film frameThe upper end of the overlay film frame section is arranged in frame section.
As shown in Figure 7 and Figure 8, after respectively overlay film frame 2 is placed in aneurysm 1, the sectional view at tumor neck；And overlay film frameAfter being placed in aneurysm 1, the sectional view at knurl.
By biocompatibility, the high molecular material of good and easy absorption blood platelet and blood coagulation substance is made above-mentioned cilium, wrapsInclude but be not limited to Nylon (nonabsorable), PGLA (containing 90% polyglycolide and 10% polyglycolic acid, caning absorb) etc..
Above-mentioned overlay film is made of the high molecular material with good biocompatibility, including but not limited to polyurethane secondEster, polytetrafluoroethylene (PTFE), polyester, terylene etc. guarantee that blood flow is flowed away along the direction of artery to distal end to completely cut off aneurysm.
It is equipped with anticreep fixing piece in the proximal end bare bracket section of overlay film frame section, which can be hangnail, barb etc., canThe impact that blood flow is resisted after bracket opening, overlay film frame is fixed on aorta wall.
Above-mentioned wavy annular wire is made of flexible alloy material, and including but not limited to stainless steel, memory is closedThe materials such as gold.
Although embodiment disclosed by the utility model is as above, the content is only to facilitate understand that this is practicalNovel and use embodiment, is not intended to limit the utility model.Skill in any the utility model technical fieldArt personnel can be in the formal and details of implementation under the premise of not departing from spirit and scope disclosed by the utility modelOn make any modification and variation, but the scope of patent protection of the utility model, must still be defined with appended claimsRange subject to.