A kind of intravascular false chamber plug rackTechnical field
The invention belongs to the field of medical instrument technology, and in particular to a kind of intravascular false chamber plug rack.
Technical background
Term " near-end " refers to one end along blood flow direction close to heart in the present invention, and " distal end " refers to remote along blood flow directionCentrifuge dirty one end.
Arotic disease is the angiocardiopathy of one group of serious threat human health, and dissection of aorta therein is a kind of calamityDifficulty disease.Dissection of aorta refers to sustainer intracavity blood and tears into aortic tunica media from aortic tunica intima, makes middle UF membrane,The true and false two chambers discrete state to form aorta wall is extended along sustainer long axis direction.At present using endovascular graft, by overlay filmStent is used to treat the big progress that dissection of aorta disease is arotic disease treatment in recent years, with traditional therapy phaseHave the advantages that slight wound, few intercurrent disease, the death rate are low etc. than, this technology.The technology is in the true intracavitary implantation blood of sustainerPipe holder blocks the near-end cut of sustainer, and avoiding blood flow, proximally primary cut continues to flow into false chamber.However, chronic phaseGenerally also there are multiple cuts in the distal end of dissection of aorta, many distal end cuts apart from the primary cut of near-end farther out, and apart from importantBifurcated artery is nearer, and break size is more than 5mm, causes the film-coated vascular stent of true intracavitary that cannot effectively close the distal end and breaksMouthful.The distal end cut will become the inflow road of false chamber so that false chamber cannot effective thrombosis, even more so that false chamber continues to expandExhibition, until aortoclasia.
At present, clinically doctor easily triggers vertebra ischemic using longer overlay film frame closure distal end cut, the technology,There is also the distal end cuts that cannot block closer important branch artery.Meanwhile it is clinically carried out far using congenital heart disease occluderHold the closure of cut, the risk to come off there are plugging device and the distal end cut that closer important branch artery can not be blocked.In addition, external clinician is using the false chamber of intravascular stent implantation after repacking, and to carry out distal end broken for the mode replanted into plugging deviceThe closure of mouthful blood reflux so that the false faster thrombosis of chamber, but the technology easily triggers blood there are stent compliance is poorThe risk of new cut is managed, while also affects postoperative false chamber and shrinks, the effect of true chamber remodeling.
The content of the invention
The present invention is to solve the problems, such as to be previously mentioned in background technology, it is proposed that a kind of intravascular false chamber plug rack, it is specialSign is, including：Rack body, distal end choked flow film, near-end choked flow film, two circumferential plugging films, release nut and fixing sleeve groupInto wherein rack body is the scalable reticulate body formed using nitinol alloy wire braiding, and choked flow film in layer 2-4 distal end is mutually flatRow, interval are installed on the distal internal of rack body, and the setting of multilayer distal end choked flow film is for preventing the blood of distal end cut from returningStream, layer 2-4 near-end choked flow film are mutually parallel, and interval is installed on the proximal inner of rack body；Two circumferential plugging film weeks are outwardsIt is overlying on the outer surface at rack body both ends；Release nut is installed on outside the distal end of rack body and is connected as one with rack bodyBody；Fixing sleeve is installed on outside the near-end of rack body and is also connected as one with rack body.
The layer 2-4 distal end choked flow film is sutured in the distal end of rack body；The layer 2-4 near-end choked flow film is sutured in stentThe near-end of main body.
In the layer 2-4 distal end choked flow film and layer 2-4 near-end choked flow film, per adjacent two layers distal end choked flow film or per adjacent twoThe spacing of layer near-end choked flow film is 5-20mm.
The shape of the distal end choked flow film and the near-end choked flow film is all for circular or D-shaped and all by macromolecule plane PETBlood vessel cloth is made.
A circumferential plugging film in two circumferential plugging films is located in layer 2-4 distal end choked flow film distalmost end and nearestBetween the distal end choked flow film at end；This circumferential direction plugging film far and near both sides respectively with the distal end choked flow film of distalmost end and most proximal endBorder sutures, and surrounds distal end choked flow space with the distal end choked flow film of distalmost end and most proximal end；
Another circumferential plugging film in two circumferential plugging films is located in layer 2-4 near-end choked flow film distalmost end and mostBetween the near-end choked flow film of near-end；The far and near both sides near-end choked flow film with distalmost end and most proximal end respectively of this circumferential direction plugging filmBorder suture, and surround a near-end choked flow space with the near-end choked flow film of circumferential plugging film and distalmost end and most proximal end；
The material material that described two circumferential plugging films use all is e-PTFE.
The developing ring of 90 degree of angles of composition is respectively provided with outside outside the distal end choked flow space and near-end choked flow spaceGroup, wherein each pair developing ring group are all made of two developing rings；A developing ring in two developing rings is vertically arranged to circumferential directionOutside plugging film, another developing ring is horizontally installed to outside the distal end choked flow film of distalmost end or the near-end choked flow film of most proximal end.
The near-end head of the rack body and distal tip are all W-shaped, are W-shaped fillet design.
The length of the rack body is 60-200mm, and section maximum width is 35mm.
The global shape of the rack body is double bulb-types, fusiformis, truncated cone-shaped, cylinder or D-shaped.
When the global shape of the rack body is double bulb-types, the bulb diameter 10-30mm at rack body both ends；
The scalable reticulate body that two bulb center section of rack body braiding at this time forms is divided into as latticed or helical form；
The shape of two bulb center section of rack body is straight-tube shape or tapered shape at this time, and spiral helicine stent compliance is moreAdd good.
The present invention compared with the existing technology has the following advantages：
Stenter to implant provided by the present invention has good compliance and fastness, Ke Yiyou in sustainer vacation intracavitaryEffect closure distal end cut, complies with sustainer form, stent is avoided to fall off phenomenon, contributes to the contraction of postoperative false chamber, true chamberRemodeling.
The main body of this stent weaves through special knitting skill, can pass through 10-18F into linear after stress drawingSheath be sent into blood vessel vacation intracavitary, be connected by discharging nut with transport system, when stent release transport system after position do not conform toIt is suitable, it can take in again in transport system, adjust the releasing position of stent；The rack body reticulates body, has goodDeformability and compliance, it is anchoring properties preferably, the phenomenon that stent drops to sustainer true chamber will not occur；The multilayer of the stent is remoteEnd resistance stream film can effectively prevent the blood reflux of distal end cut, and near-end choked flow film can prevent the blood of leakage in near-end from entering bloodPipe vacation chamber contributes to the thrombosis of false chamber；The technology only needs an intravascular false chamber plug rack to solve existing distal end cutThe problem of, it avoids intravascular stent in the prior art and the problem of plugging device is used cooperatively, reduces the medical treatment cost of patient.
Description of the drawings
Fig. 1 is when rack body is latticed double bulb-types in a kind of intravascular false chamber plug rack embodiment 1 of the inventionStructure diagram；
Fig. 2 is the structure diagram when rack body is the double bulb-type of helical form in the embodiment of the present invention 1；
Fig. 3 is the structure diagram when rack body is fusiformis in the embodiment of the present invention 2；
Fig. 4 be in the embodiment of the present invention 2 when rack body is truncated cone-shaped structure diagram；
Fig. 5 be in the embodiment of the present invention 2 when rack body is cylinder structure diagram；
Fig. 6 be in the embodiment of the present invention 2 when rack body is D-shaped structure diagram；
Fig. 7 is implanted into sustainer vacation chamber schematic diagram for false chamber plug rack transport system in 1 medium vessels of the embodiment of the present invention；
Fig. 8 locally discharges schematic diagram for false chamber plug rack in 1 medium vessels of the embodiment of the present invention；
Fig. 9 is schematic diagram after false chamber plug rack in 1 medium vessels of the embodiment of the present invention all release；
Reference sign：1- rack bodies；2- distal ends choked flow film；3- near-end choked flow films；4- circumferential direction plugging films；5- dischargesNut；6- fixing sleeves；7- developing ring groups.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples：
A kind of intravascular false chamber plug rack embodiment 1 of the present invention as depicted in figs. 1 and 2 is hindered by rack body 1, distal endStream film 2, near-end choked flow film 3, circumferential plugging film 4, release nut 5, fixing sleeve 6 and developing ring 7 form, and wherein rack body 1 isThe scalable reticulate body formed using nitinol alloy wire braiding；The global shape of rack body 1 is double bulb-types, among two bulbsPart is straight-tube shape or tapered shape, and the near-end head of rack body 1 and distal tip are all W-shaped, is W-shaped fillet design, makesRack body 1 with vascular wall is round and smooth contacts, avoid the Sharp edge of rack body to the damage of vascular wall, rack body 1Length is 60-200mm, and section maximum width is 35mm；The center section braiding of double bulb-type rack bodies forms scalableReticulate body can be divided into latticed (such as Fig. 1) or helical form (such as Fig. 2), the bulb diameter 10-30mm at rack body both ends, spiral shell againThe stent compliance of rotation shape is better, is adapted to the complexity vacation chamber for rotating tear along sustainer axis direction and being formed；
Release nut 5 is installed on outside the distal end of rack body 1 and is connected as one with rack body 1；Fixing sleeve 6 is installed onIt is also connected as one outside the near-end of rack body 1 with rack body 1；
Made of macromolecule plane PET blood vessel cloth distal end choked flow film 2 and made of macromolecule plane PET blood vessel cloth it is nearEnd resistance stream film 3 is all located at the inside of rack body 1；Layer 2-4 shape is sewed at the distal end bulb of rack body 1 as circular or DThe distal end choked flow film 2 of shape, and the distance per adjacent two layers distal end choked flow film 2 is 5-20mm, multilayer distal end choked flow film 2 can preventThe blood reflux of distal end cut；There is layer 2-4 shape at the near-end bulb of rack body 1 for circular or D-shaped near-end choked flow film 3,And the distance per adjacent two layers near-end choked flow film 3 is 5-20mm, multilayer near-end choked flow film 3 can prevent the blood of leakage in near-end intoEnter false chamber, accelerate the thrombosis of near-end, reduce leakage degree in near-end；
Use two circumferential circumferential outer outer surfaces for being overlying on 1 both ends of rack body of plugging film 4 that e-PTFE is material material；WhereinOne circumferential plugging film 4 is located in layer 2-4 distal end choked flow film 2 between distalmost end and the distal end choked flow film 2 of most proximal end；This circumferential directionThe far and near both sides of plugging film 4 suture respectively with the border of distalmost end and the distal end choked flow film 2 of most proximal end, and with distalmost end and recentlyThe distal end choked flow film 2 at end surrounds distal end choked flow space；Another circumferential plugging film 4 is located in layer 2-4 near-end choked flow film 3 mostBetween distal end and the near-end choked flow film 3 of most proximal end；The far and near both sides of this circumferential direction plugging film 4 respectively with distalmost end and most proximal endThe border suture of near-end choked flow film 3, and surround one closely with the near-end choked flow film 3 of circumferential plugging film 4 and distalmost end and most proximal endEnd resistance fluid space；The presence in distal end choked flow space and near-end choked flow space can cause stent with false chamber vascular wall leakproofness moreIt is good, it is effective to prevent blood reflux to false intracavitary；
Two pairs of developing ring groups 7 into 90 degree of angles are respectively arranged in outside the choked flow space of distal end and outside near-end choked flow space；OftenDeveloping ring group 7 is made of two developing rings, one of them is vertically arranged to outside circumferential plugging film 4, another is horizontally installed toOutside the distal end choked flow film 2 of distalmost end or the near-end choked flow film 3 of most proximal end.
A kind of method of intravascular false 1 release of chamber plug rack embodiment of the present invention is：
As shown in fig. 7, after sustainer is implanted into film-coated vascular stent, distally there are larger-size cut, pass through conveyingA kind of intravascular false chamber plug rack is transported to false intracavitary by system；
As shown in figure 8, the outer sheath for transport system of then dropping back so that a kind of intravascular false chamber plug rack is gradually releasedIt puts；
As shown in figure 9, until after stent release completely, transport system is withdrawn from；
If position is improper after a kind of intravascular false chamber plug rack release, stent can be recovered to transport systemIn sheath, release is re-started.
A kind of intravascular false chamber plug rack embodiment 2 of the present invention as shown in Figures 3 to 6 is hindered by rack body 1, distal endStream film 2, near-end choked flow film 3, circumferential plugging film 4, release nut 5, fixing sleeve 6 and two groups of developing rings 7 form, wherein rack body1 is the scalable reticulate body formed using nitinol alloy wire braiding；The global shape of rack body 1 is fusiformis (Fig. 3), truncated cone-shaped(Fig. 4), cylindrical (Fig. 5) or D-shaped (Fig. 6), different 1 shapes of rack body can meet false chamber requirement of different shapes, withIncrease the stickiness of rack body 1 and blood vessel vacation chamber, the near-end head of rack body 1 and distal tip are all W-shaped, and W-shaped areFillet design so that rack body 1 with vascular wall is round and smooth contacts, avoid the Sharp edge of rack body to the damage of vascular wall,The length of rack body 1 is 60-200mm, and section maximum width is 35mm；
Release nut 5 is installed on outside the distal end of rack body 1 and is connected as one with rack body 1；Fixing sleeve 6 is installed onIt is also connected as one outside the near-end of rack body 1 with rack body 1；
Made of macromolecule plane PET blood vessel cloth distal end choked flow film 2 and made of macromolecule plane PET blood vessel cloth it is nearEnd resistance stream film 3 is all located at the inside of rack body 1；It is circular or D-shaped remote that the distal suture of rack body 1, which has layer 2-4 shape,End resistance stream film 2, and the distance per adjacent two layers distal end choked flow film 2 is 5-20mm, multilayer distal end choked flow film 2 can prevent distal end brokenThe blood reflux of mouth；The proximal staple of rack body 1 has layer 2-4 shape for circular or D-shaped near-end choked flow film 3, and per adjacentThe distance of two layers of near-end choked flow film 3 is 5-20mm, and multilayer near-end choked flow film 3 can prevent the blood of leakage in near-end from entering false chamber,Accelerate the thrombosis of near-end, reduce leakage degree in near-end；
Use two circumferential circumferential outer outer surfaces for being overlying on 1 both ends of rack body of plugging film 4 that e-PTFE is material material；WhereinOne circumferential plugging film 4 is located in layer 2-4 distal end choked flow film 2 between distalmost end and the distal end choked flow film 2 of most proximal end；This circumferential directionThe far and near both sides of plugging film 4 suture respectively with the border of distalmost end and the distal end choked flow film 2 of most proximal end, and with distalmost end and recentlyThe distal end choked flow film 2 at end surrounds distal end choked flow space；Another circumferential plugging film 4 is located in layer 2-4 near-end choked flow film 3 mostBetween distal end and the near-end choked flow film 3 of most proximal end；The far and near both sides of this circumferential direction plugging film 4 respectively with distalmost end and most proximal endThe border suture of near-end choked flow film 3, and surround one closely with the near-end choked flow film 3 of circumferential plugging film 4 and distalmost end and most proximal endEnd resistance fluid space；The presence in distal end choked flow space and near-end choked flow space can cause stent with false chamber vascular wall leakproofness moreIt is good, it is effective to prevent blood reflux to false intracavitary；
Two pairs of developing ring groups 7 into 90 degree of angles are respectively arranged on rack body 1, and are located at distal end choked flow space respectivelyOutside outer and near-end choked flow space；Each pair developing ring group 7 is all made of two developing rings, and one of developing ring is vertically arranged to weekOutside plugging film 4, another developing ring is horizontally installed to the distal end choked flow film 2 of distalmost end or the near-end choked flow film 3 of most proximal endOutside.