CN209548046U - A kind of braided support system - Google Patents

Abstract

The utility model provides a kind of braided support system, and in particular to medical instruments field, including bracket, bracket are the net tubular structures as made of the braiding of one or more high stretch yarn；It is gone back on bracket while being woven with one or more development silks；It is freely slidable bridging type structure at the node of interlaced two high stretch yarns or the silk that develops；The high stretch yarn or development silk of mount proximal end are collected in adherent wedge shape；The diameter of the long high stretch yarn in 1 to 20 millimeter of bracket both ends and development silk is less than the diameter of mid-stent silk, and the end of high stretch yarn and development silk is arc-shaped through laser or electrobrightening processing.The utility model can not only be used for that thrombus device is taken to treat acute cerebral stroke, and can be used as and be chronically implanted bracket for treating narrow or occlusion blood vessel.

Description

A kind of braided support system

Technical field

The utility model belongs to medical instruments field, and in particular to a kind of braided support system.

Background technique

Headstroke is the refractory disease that most serious endangers human health and life security, is occurred according to statistics China is annual Patient with cerebral apoplexy is up to 3,000,000, annual stroke patient dead 1,200,000.Now survival stroke patient 8,000,000, wherein 6,000,000 patients are different It degree disability and can't take care of oneself.In recent years, acute brain had gradually been carried out in some hospitals, European and American developed countries Thrombus bracket removal surgery, is compared with conventional medicine thrombolysis, and bracket takes that the bolt method used time is short, risk is low, is taken up rate high (up to 90%), it is often more important that window time can extend to after disease hair 8 hours.The acute thrombus that doctor the most American-European receives now Extraction system is the Solitaire FR Device of ev3 company, the U.S. and the Trevo Retriever of Stryker company, the U.S.. The structure and application method of the two be it is almost consistent, entire instrument is to be compressed in a branch of the internal diameter less than 0.6 millimeter in advance In frame transfer pipe.When thrombus being taken to perform the operation, doctor will take thrombus bracket to be pushed into microtubular, and push thrombus along microtubular, and After withdraw microtubular, what is released takes thrombus bracket that can entangle thrombus.Doctor slowly withdraws microtubular and takes thrombus bracket, The thrombus entangled is transferred in the bigger guiding catheter of internal diameter.After thrombus takes out, the illness of most patient has very big alleviation.

In recent years, there is patent application similar in the multiple and design, for example publication No. is CN202313575U, CN The patents such as 103284775A, CN103417261A, but above-mentioned thrombus bracket is taken to have common following lack in actual clinical Point:

(1) clinically use to take thrombus bracket all be that tweezer titanium alloy tube is formed through laser engraving.Pulling thrombus process In, the beam and blood vessel of the bracket of this kind of hollow out form of tubes are face contact friction, will cause endangium and are damaged, cause platelet aggregation Collect and then lead to secondary thrombus, form intravascular scar when serious and cause reangiostenosis, again apoplexy, is brought to patient very big Risk.

It (2) is all straight tube structure with upper bracket, when pulling thrombus, microthrombus is easy to slip, and flows to and blocks distal end blood Pipe.

The braided support widely used is to be worked out using wire by axially and radially intersecting to surround and recycle Net tubular bracket, for bracket when pulling thrombus, tweezer titanium alloy wire and blood vessel are soft line contacts, will not be to vascular wall Generate damage；

As shown in Fig. 2, the silk at hand woven bracket both ends is not interrupt continuously arc-shaped, and the arc radius is at least super 0.6 millimeter is crossed, only has 0.5 millimeter of small stent delivery catheter (micro- to lead so that such bracket can not be compressed into internal diameter Pipe).

As shown in Fig. 3, the silk at machine braided support both ends is not connected to, and can be matched with microtubular, still The problem of machine braided support be silk pointed end can the cerebrovascular to wall thickness very little, tissue cause to damage.

It is (micro- to lead that the support system of cerebrovascular intervention generally includes a bracket transfer pipe, small stent delivery catheter Pipe), delivery guidewire and nick-eltitanium alloy stent.Before use, delivery guidewire and bracket are integrated press-mountings in an internal diameter very little In bracket transfer pipe.Delivery guidewire length is greater than bracket transfer length of tube and delivery conduit length.Operation is initial, first by microtubular Lesion (such as thrombus of blocking blood vessel) is pushed to until microtubular distalmost end crosses lesion, then by bracket transfer pipe distal end Delivery conduit seat is withstood, microtubular can be promoted for bracket by slowly pushing delivery guidewire, continue to push delivery guidewire, until bracket Cross lesion in proximal end.

Superelastic NiTi alloy bracket significantly compressing before implantation has a major impact the safety of bracket.Significantly Compression can make bracket locally generate biggish strain, material can be made to occur when this strain has exceeded the strain limit of material permanent Property deformation.Bracket used in clinic shifts bore close to microtubular internal diameter, and usual bracket can be by so substantially before using Degree compression will affect the mechanical performance of bracket up to even year some months in this way.

Arteria carotis and vertebral artery atherosclerotic it is narrow be one of main reason of Ischemic Stroke, 5 after First episode The incidence of stroke is greater than 25% again in year.In the case where drug therapy and Traditional surgical treatment less effective, blood Pipe inner support interventional therapy, because it is bordering on 100% technique successful rate and almost nil Peri operative mortality and lower Complication rate, promote the treatment of arteria carotis and vertebral artery narrowing, from traditional surgical operation to minimally invasive intravascular stent Treatment transformation.Arteria carotis and vertebral artery interventional therapy are unlike other position stent-assisted angioplasties, after neointimal hyperplasia, and It is not high to send out ratio shared by in-stent restenosis.The deformation (including bracket fracture, discounting and compression) of bracket, which is only, to cause to prop up The major reason of restenosis in frame.External force factor includes excessive flexible, rotation of bracket merging section blood vessel etc..Vertebral artery and clavicle Lower arterial distal is all relatively movable, and proximal end is then fixed by skeletal thorax, and by the respirometric influence of thorax, this The fatigue for inevitably resulting in bracket a bit sexually revises.But existing arteria carotis and vertebral artery stent such as Boston science are public The Wingspan bracket of department, Shanghai minimally invasive company Apollo bracket, Stryker company NEUROFORM bracket, EV3 Company Prot é g é bracket, is all that Nitinol pipe is cut by laser, and this bracket for engraving hollow tubular structure is in tortuous dynamic of encephalic In arteries and veins blood vessel, especially corner release will form the protrusion such as " fish scale " shape, " sawtooth " shape and hang with recessed, can not paste blood well Inside pipe wall will cause in-stent restenosis, is chronically implanted after-poppet restenosis rate and is up to 50%, it is easy to cause blood in bracket Bolt even damages blood vessel, very harmful to sufferer.

Arterial obliterans of lower extremity (PAD) is to cause artery of lower extremity narrow since lower extremity atherosclerosis is formed Narrow, occlusion, and then lead to limbs chronic ischemia.Early treatment scheme includes that (1) arterial bypass and (2) endarterium strip off Art, these operations are all that risk is larger costly.And the percutaneous endoluminal vascular Stent carried out in recent years is micro- Treatment method is created, operation risk is low, restores fast.This method conveys foley's tube to arteriarctia or occlusion through arteriopuncture Position, expansion, reconstruction arterial lumen can get preferable clinical effectiveness in conjunction with the use of support in blood-vessel, be currently first The first-line treatment of choosing.But bracket used in clinic also all engraves hollow tubular structure.It is rigidity between the beam of these brackets Connection, internal stress can not be discharged when bracket is by bending or compression.When this kind of bracket use is in lower limb vascular, whenever patient When walking about or squatting down, bracket is just deformed by severe bends, when being chronically implanted lower limb vascular, according to the branch of clinical report up to 30% Frame can be broken, and the bracket of fracture normally results in stent restenosis, jeopardize patient vitals when serious.

In view of the above summary, what is clinically used now takes thrombus device and intravascular stent to have many design limitations, needs Want utilitarian design is novel more preferably to take thrombus device and intravascular stent system.

Utility model content

Metal product is carried out to special anode processing by electrobrightening in the solution of definite composition, to be put down Sliding, glossy surface finish process.When passing to direct current in electrolyte, electrochemical dissolution, workpiece occur for anode surface Surface mucous membrane composed by anode metal and electrolyte that one layer dissolves covers, and viscosity is very high, and conductivity is very low.Workpiece Surface is uneven, and the mucous membrane of concave portion is thicker, and resistance is larger, and the mucous membrane of convex portion is relatively thin, and resistance is smaller.Cause This, the current density ratio concave portion of convex portion it is big, dissolve fastly, therefore electrobrightening can be by uneven metal surface Erosion is flat, to obtain and mechanically polish identical effect.Fig. 4 is shown by the silk end of electrobrightening processing with arc-shaped Shape.

For the benefit of the clinically defect of all kinds of intravascular stents and electrobrightening metal, the utility model provides a kind of volume Knit support system, can not only be used for taking thrombus device to treat acute cerebral stroke, but can be used as be chronically implanted bracket be used to treat it is narrow Narrow or occlusion blood vessel；And the internal diameter of the bracket transfer pipe of the utility model is proximally to being distally gradually reduced；Bracket makes With the maximum side of internal diameter is preceding fitted in, it is maximally maintained original mechanical performance of bracket.

The utility model provides the following technical solution:

A kind of braided support system, including bracket transfer pipe, bracket delivery guidewire and bracket；The bracket be by one or Net tubular structure made of more high stretch yarn braidings；The high stretch yarn uses tweezer titanium alloy or cochrome；On the bracket It is also woven with one or more development silks simultaneously；It is at the node of interlaced two high stretch yarns or the development silk Freely slidable bridging type structure；The material of the development silk is metal or its conjunction that density is equal to or more than silver-colored density Gold；Or the metal of silver-colored density is equal to or more than using density or its alloy as inner core, tweezer titanium alloy is the composite filament of shell；Or It is spring pocket component made of the high stretch yarn made of the development silk；The high stretch yarn or described of the mount proximal end Development silk is collected in adherent wedge shape.The diameter of the long high stretch yarn in 1 to 20 millimeter of the bracket both ends and the development silk Less than the diameter of the mid-stent silk, and the end of the high stretch yarn and the development silk is through laser or electrobrightening processing Arc-shaped, the arc diameter are greater than or equal to the diameter of silk.

Preferably, the delivery guidewire is proximally tapered to distal end, and the mount proximal end is set with the delivery guidewire distal end It sets in developing ring or development spring ring, and the mount proximal end, the delivery guidewire and the developing ring or development spring ring Clamp or be bonded or welded or welding by way of connect, between the delivery guidewire and the developing ring or development spring ring Equipped with freeing section；

Preferably, the mid-stent size of mesh opening is greater than or equal to the size of mesh opening at bracket both ends；The net of the bracket Lattice are having a size of between 1 millimeter to 4 millimeters；After the bracket is released from delivery conduit, the silk of the rack far end, which closes up, is in Interior receipts structure, and the bracket, when human body indwelling time is greater than 30 minutes, the rack far end reverts to straight tube structure.

When preferably, for taking thrombus device, the bracket has three-dimensional structure wave-shaped.

When preferably, for taking thrombus device, the stent diameter is than the mount proximal end or the rack far end diameter 0-2 millimeters small, the mount proximal end and the rack far end length are 1-30 millimeters.

When preferably, for taking thrombus device, the high stretch yarn of the rack far end or development silk is adherent collects It is wedge shaped perhaps to collect the tapered or described high stretch yarn along central axes or the development silk links together two-by-two.

Preferably, when being used for intravascular stent, the bracket overall length is open straight tube structure.

Preferably, when being used for intravascular stent, the mid-stent size of mesh opening is less than or equal to the net at the bracket both ends Lattice size；The size of mesh opening of the bracket is 0.01 millimeter to 2 millimeters.

Preferably, all or part of length of the rack outer surface or the stent inner surface is covered with macromolecule membrane Layer.

Preferably, the bracket transfer bore is between 0.5 millimeter and 4 millimeters, the internal diameter of the bracket transfer pipe Proximally to being distally gradually reduced.

The utility model has the beneficial effects that

(1) the utility model can efficiently take out multiple thrombus, while the rack far end of interior receipts as thrombus withdrawing device Structure can capture the microthrombus for flowing to distal end, avoid thrombus blocking in distal end that second stroke occurs；If clinical after taking thrombus The bracket is needed to be retained at certain section of narrow blood vessel, the rack far end by special thermal treatment can restore straight within several hours Tube shape, it is ensured that blood flow is unobstructed.

(2) the utility model is as thrombus withdrawing device, because mid-stent diameter is less than in bracket both ends diameter, bracket Portion's grid be greater than bracket both ends grid, thrombus can secured incarceration mid-stent without slipping, avoid microthrombus blocking distally it is small Blood vessel significantly reduces operation complications.Similar, it is described to have effects that the bracket of three-dimensional structure wave-shaped also has.

(3) bracket of the utility model, which can be used as, is chronically implanted bracket for expanding narrow intracranial vessel, restores blood Stream.The silk end corner angle that the bracket both ends part of the utility model carries out after electrobrightening processing can all become arc-shaped, this Blood vessel will not be damaged when the wire and contacts blood of kind row state, the safety of bracket is greatly improved；

(4) after the utility model is by carrying out electrobrightening to bracket both ends part, the size of both ends wire is bound to small In the size of stent wire, more optimizedly two terminal filaments are in tapered taper from bracket to bracket, and such bracket hardness is Gradually small from main body to both ends, finished product bracket is submissiveer, passability is more preferable.On the other hand, because two terminal filament of bracket is less than bracket Silk, such bracket, which is easier to press, to be held into tiny conduit, is more conducive to perform the operation using small conduit and be implemented, while reducing to disease Customs and morals of the people danger.

(5) internal diameter of the bracket transfer pipe of the utility model is proximally to being distally gradually reduced；Bracket is using being preceding fitted in The maximum side of internal diameter has been maximally maintained original mechanical performance of bracket.

Detailed description of the invention

Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:

Fig. 1 is the schematic diagram of the utility model braided support；

Fig. 2 is traditional-handwork braided support schematic diagram；

Fig. 3 is conventional machines braided support schematic diagram；

Fig. 4 is the processed wire ends schematic diagram of the utility model；

Fig. 5 is schematic diagram of the utility model as thrombus removal equipment；

Fig. 6 is the bracket transfer pipe that the utility model has been pressed bracket.

Fig. 7 is the support schematic diagram that the utility model has wavy three-dimensional structure；

Fig. 8 is the support schematic diagram that the utility model is used as expansion narrow blood vessel；

In the figure, it is marked as 1, bracket；2, delivery guidewire；3, bracket transfer pipe；11, high stretch yarn；12, auxiliary wire；13, it props up Frame proximal end；14, delivery conduit；15, rack far end；16, developing ring or development spring ring；17, develop silk；18, with circular arc End silk；21, delivery guidewire proximal end；22, delivery guidewire distal end；23, section is freed；31, bracket transfer pipe proximal end；32, bracket turns Move Guan Yuanduan.

Specific embodiment

Embodiment 1- the utility model is as thrombus withdrawing device:

As shown in figure 5, the bracket of the utility model is the structure that middle section diameter is small, both ends diameter is big, bracket 1 can be one Root or multi-filament manually or the braided support that is made of braider, are also possible to be machined into through laser engraving； The silk material that multi-filament knits out the bracket come can be a kind of material or a variety of different materials, and high stretch yarn 11 uses tweezer titanium alloy 17 material of development silk of silk or 11 mixed weaving of cochrome silk and high stretch yarn is high desnity metal or its alloy；

Further, the mount proximal end 13 of bracket 1 is in adherent wedge shape, and cone angle is 0 degree to 75 degree, and and delivery guidewire 2 link together, and such design is conducive to the recycling of bracket 1 and enters bracket transfer pipe 3；

The material of the delivery guidewire 2 further to link together with mount proximal end 13 are as follows: tweezer titanium alloy or cobalt chromium close Gold or stainless steel；Mount proximal end 13 and rack far end 15 are provided under x-ray develop extraordinary developing ring or development spring Circle 16；

Further, 1 size of mesh opening of bracket is greater than the size of mesh opening at both ends, so that thrombus firmly can enter branch by incarceration Frame 1.

As shown in fig. 6, being shifted using preceding delivery guidewire distal end 22 and 1 integrated press-mounting of bracket in a tapered bracket 3 in conduit, and bracket 1 is located at the biggish transfer pipe proximal end 31 of internal diameter；2 length of delivery guidewire is greater than 3 length of bracket transfer conduit With 14 length of delivery conduit.Operation is initial, first shifts delivery conduit 14 onto lesion (such as thrombus of blocking blood vessel) until defeated It send 14 distalmost end of conduit to cross lesion, bracket transfer conduit distal end 32 is then withstood delivery conduit 14, slowly push branch Frame 1 enters 14 inner cavity of delivery conduit.Continue to push bracket 1 until mount proximal end 13 crosses lesion (such as thrombus)；If necessary Bracket 1 is discharged, delivery guidewire proximal end 21 is pinned, slowly withdraws conveying delivery conduit 14, rack far end 15, bracket 1 are close with bracket End 13 is just successively released out of delivery conduit 14.If necessary to recycle bracket 1, need to pin 14 most proximal end of delivery conduit, Delivery guidewire 2 is slowly withdrawn, mount proximal end 13, bracket 1 and rack far end 15 are just successively recovered to inside delivery conduit 14；When For the secured incarceration of thrombus after bracket 1, doctor slowly withdraws delivery guidewire 2 and delivery conduit 14, will gradually have the bracket 1 of thrombus The very big guiding catheter of internal diameter is pulled to, after thrombus enters guiding catheter, doctor slowly withdraws whole system, will finally take blood Pin device and its thrombus take out from patient's blood vessel, complete operation.

Embodiment 2- the utility model is as the blood vessel that stent-expansion is narrow or blocks:

As shown in figure 8, the bracket 1 of the utility model is round tube, bracket 1 can be one or more silk manually or compile The braided support that loom is made is also possible to be machined into through laser engraving；Multi-filament knits out the bracket 1 come Silk material can be a kind of material or a variety of different materials, and high stretch yarn 11 is using tweezer titanium alloy wire or cochrome silk and high-elastic 12 material of auxiliary wire of silk mixed weaving can be the strong silk of developing performance, be also possible to the strong silk of mechanical performance；

Further, mount proximal end 13 be in adherent wedge shape, cone angle be 0 degree to 75 degree, and with delivery guidewire distally 22 It links together, such design is conducive to the recycling of bracket 1 and enters delivery conduit 14；

Further, diameter range is 1 millimeter to 30 millimeters after bracket 1 discharges completely, and length range is 5 millimeters and arrives 300 millimeters；2 length of delivery guidewire being fixed together with bracket proximal segment is 20 centimetres to 200 centimetres, 0.1 millimeter to 3 of diameter Millimeter；

Further, the silk material matter of bracket 1 can be one of following material or a variety of: tweezer titanium alloy, cochrome, Stainless steel, pure platinum or its alloy, true yellow gold or its alloy, pure tungsten or its alloy, pure tantalum or its alloy, degradable metal material Material, biodegradable material (such as polylactic acid PLLA)；

The material of the delivery guidewire 2 further to link together with mount proximal end 21 are as follows: tweezer titanium alloy or cobalt chromium close Gold or stainless steel；Mount proximal end 13 is provided under x-ray develop extraordinary developing ring or development spring 16；

Further, the delivery guidewire 2 that mount proximal end 13 is covered with insulating film with one is connect, delivery guidewire distal end 22 on branch 12 junction of frame proximal end includes that one section of naked film frees section 23；Netted bracket 1 can free section 23 through electrolysis with it is described Delivery guidewire 2 separates, so that bracket release plays therapeutic effect in the intravascular of lesion.

Further, 1 count of bracket is greater than the count at both ends, so that bracket 1 be allow to provide higher diameter Being highly suitable as expandable stent to power ensures narrow section vascular patency.

The utility model usage mode is as follows:

Bracket 1 and delivery conduit 14 are pushed at narrow blood vessel by doctor, then pin be connected with mount proximal end 13 it is defeated Guidewire proximal 21 is sent, delivery conduit 14 is slowly withdrawn, bracket 1 is gradually released by distally at this time, by narrow blood Enlargement of pipe is opened, and patient's blood flow is dredged at once, remission；It, can be by withdrawing conveying if doctor is dissatisfied to 1 position of bracket Bracket 1 is withdrawn delivery conduit 14 by seal wire 2, readjusts 14 position of delivery conduit, bracket 1 is then discharged again, finally branch In the middle part of frame 1 release at narrow blood vessel, due to bracket 1 expand supporting role, stenosis blood vessel actual inner diameter increase, blood flow by Cumulative to add, patient symptom releases.After success discharges, doctor slowly withdraws delivery guidewire 2 and delivery conduit 14, and bracket is conveyed System is withdrawn from patient body；When expanding as peripheral vascular stents and supporting narrow blood vessel, bracket 1 needs higher radial direction Power, more preferred 12 material of auxiliary wire is the strong cochrome of rigidity or stainless steel or tungsten wire.

Embodiment 3

When bracket 1 is placed in lower limb vascular (such as femoral artery, hip artery , popliteal artery etc.) by very big challenge, in people When walking about or squatting down, bracket 1 will receive very big compression and bending, once 1 rigidity of bracket and bending resistance are poor, bracket 1 The probability of fracture is larger；The bracket 1 of the special designing of the utility model is very suitable to expand narrow lower limb vascular, such as Fig. 8 institute Show, 1 middle part count of bracket is greater than the count at both ends；The characteristic of braided support is that count is bigger, stiffness of support It is stronger, bracket radial force is higher, so that finished product bracket bending resistance is more superior, be less susceptible to be broken.

Present apparatus production method 1 is as follows:

As shown in Figure 1, pressing particular design: first using a metal cylinder as mold, and processing according to design a plurality of Parallel groove takes one or more high stretch yarns 11 and development silk 17 in such a way that forward-reverse spiral line staggeredly passes through, along groove Winding is woven into that proximal end is wedge shaped, and main body is the bracket 1 of round tube shape；Bracket 1 and its mold are put into baking oven and carry out thermal finalization； By taking memorial alloy as an example: for heat setting temperature between 450 degree Celsius~550 degree, the time is 2 to 30 minutes；Silk material diameter and Stent diameter is smaller, and setting time is shorter；

Rack far end 15 and mount proximal end 13 are subjected to electrobrightening processing respectively, so that the diameter both ends for obtaining silk are tapered Effect, an end can be obtained by, which being further processed, is arc-shaped shape

Then, a developing ring 16 is taken to be fixed to the corresponding position of mount proximal end 13；Or the good silk of development effect is twined It is coiled into the corresponding position that spring like is set to mount proximal end 13, for showing the position of mount proximal end 13；

Branch is made into finally, delivery guidewire distal end 22 and development spring 16 and 13 tow of mount proximal end are welded together 1 finished product of frame.

Present apparatus production method 2 is as follows:

As shown in fig. 7, by particular design: a metal cylinder being processed into wavy mold first, and according to design A plurality of parallel groove is processed, the side for taking one or more high stretch yarns 11 and development silk 17 staggeredly to pass through with forward-reverse spiral line Formula is woven into that proximal end is wedge shaped along groove winding, and main body is the three-dimensional structure bracket 1 with wave-like；By bracket 1 and its Mold is put into baking oven and carries out thermal finalization；By taking memorial alloy as an example: heat setting temperature between 450 degree Celsius~550 degree, when Between be 2 to 30 minutes；Silk material diameter and stent diameter are smaller, and setting time is shorter.

It takes one or more developing ring 16 to weld together the silk of rack far end 15 two-by-two, and is processed into smooth It is spherical, for showing the position of mount proximal end 13；

A developing ring 16 is taken to be fixed to mount proximal end 13, again for showing the position of mount proximal end 13；

Finally the tow of delivery guidewire distal end 22, developing ring 16 and mount proximal end 13 is welded together and is made into bracket 1 finished product.

The above is only the preferred embodiments of the utility model, are not intended to limit the utility model, although referring to before Embodiment is stated the utility model is described in detail, it for those skilled in the art, still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features.It is all this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (9)

1. a kind of braided support system, it is characterised in that: including bracket transfer pipe, bracket delivery guidewire and bracket；

The bracket is the net tubular structure as made of the braiding of one or more high stretch yarn；

The high stretch yarn uses tweezer titanium alloy or cochrome；

It is gone back on the bracket while being woven with one or more development silks；

It is freely slidable bridging type structure at the node of interlaced two high stretch yarns or the development silk；

The material of the development silk is the metal or its alloy that density is equal to or more than silver-colored density；Or be equal to density or It is inner core, the composite filament that tweezer titanium alloy is shell greater than the metal of silver-colored density or its alloy；Or bullet made of the development silk Spring covers the component made of the high stretch yarn；

The high stretch yarn of the mount proximal end or the development silk are collected in adherent wedge shape；

The diameter of the long high stretch yarn in 1 to 20 millimeter of the bracket both ends and the development silk is less than the mid-stent silk Diameter, and the end of the high stretch yarn and the development silk is arc-shaped, the arc diameter through laser or electrobrightening processing More than or equal to the diameter of silk；

The mid-stent diameter is 0-2 millimeters smaller than the mount proximal end or the rack far end diameter, the mount proximal end and The rack far end length is 1-30 millimeters.

2. a kind of braided support system according to claim 1, it is characterised in that: further include developing ring or development spring Circle, distal end is tapered from the delivery guidewire proximal end to the delivery guidewire for the delivery guidewire, the mount proximal end with it is described defeated Send wire distal setting in developing ring or development spring ring, and the mount proximal end, the delivery guidewire and the developing ring Development spring ring clamp or be bonded or welded or welding by way of connect, the delivery guidewire and the developing ring or aobvious It is equipped between shadow spring ring and frees section.

3. a kind of braided support system according to claim 1, it is characterised in that: the size of mesh opening of the mid-stent is big In or equal to the bracket both ends size of mesh opening；The size of mesh opening of the bracket is between 1 millimeter to 4 millimeters；The bracket After releasing from delivery conduit, the silk of the rack far end closes up in interior receipts structure, and the bracket is in human body indwelling time When greater than 30 minutes, the rack far end reverts to straight tube structure.

4. a kind of braided support system according to claim 1, it is characterised in that: the bracket has wave-shaped three Tie up structure.

5. a kind of braided support system according to claim 1, it is characterised in that: the high stretch yarn of the rack far end Or all adherent collect wedge shaped perhaps collects the tapered or described high stretch yarn or the development along central axes to the development silk Silk links together two-by-two, and tow end is arc-shaped through laser or electrobrightening processing, and the arc diameter is greater than or equal to The diameter of silk.

6. a kind of braided support system according to claim 1, it is characterised in that: the bracket overall length is open straight tube Structure, the end of silk are arc-shaped through laser or electrobrightening processing, and the arc diameter is greater than or equal to the diameter of silk.

7. a kind of braided support system according to claim 1, it is characterised in that: the mid-stent size of mesh opening is less than Or the size of mesh opening equal to the bracket both ends；The size of mesh opening of the bracket is 0.01 millimeter to 2 millimeters.

8. a kind of braided support system according to claim 7, it is characterised in that: the rack outer surface or the bracket All or part of length of inner surface is covered with macromolecule membrane layer.

9. a kind of braided support system according to claim 1, it is characterised in that: bracket transfer bore between Between 0.5 millimeter and 4 millimeters, the internal diameter of the bracket transfer pipe is remote from bracket transfer pipe proximal end to the bracket transfer pipe End is gradually reduced.