CN204133646U - Intraluminal stent - Google Patents

Abstract

The utility model discloses a kind of intraluminal stent, the overlay film frame section comprising bare bracket section and be connected with bare bracket section, bare bracket section comprises at least two coaxial wavy annular things and rigid connector, bare bracket section also comprises flexible couplings that is nonelastic and that can bend arbitrarily, two wavy annular things often adjacent at least two wavy annular things are connected with flexible couplings by rigid connector, rigid connector mixes with flexible couplings and arranges in the circumferential, and the length of flexible couplings is slightly larger than the shortest spacing between two wavy annular things.This utility model provides a kind of and can improve support compliance and keep the intraluminal stent of the axial bonding strength of support.

Description

Intraluminal stent

Technical field

This utility model belongs to technical field of medical instruments, relates to a kind of intraluminal support, particularly relates to a kind of for the intraluminal stent in aorta.

Background technology

In arotic disease, mainly comprise dissection of aorta and aortic aneurysm two class disease; Aortic aneurysm is further divided into aorta true aneurysm and aortic pseudoaneurysm.Aortic aneurysm and dissection of aorta are a kind of very dangerous diseases, and the mortality rate of falling ill in latter 48 hours is greater than 50%, and the mortality rate in two weeks is greater than 85%, serious threat human health.Along with the arrival of Chinese aging trend, its sickness rate will constantly rise.

In aortic aneurysm patient, abdominal aortic aneurysms accounts for 63% ~ 79% of aortic aneurysm prevalence, and the multiple elderly population being born in more than 60 years old, and sickness rate reaches 2% ~ 4%, and male, more than women, comes the 13rd in all causing in dead reason.As shown in Fig. 1 a, 1b, most of abdominal aortic aneurysm 4 is caused by atherosclerosis, generally be positioned at the far-end of renal artery 2 (in implantation field, usual definition blood proximally flows to far-end, blood flows to as shown in arrow in Fig. 1 a, 1b), extend to abdominal aortic bifurcation place, ordinary wave and iliac artery 5, be positioned at renal artery more than 2 position once in a while; Once patient's abdominal aortic aneurysm 4 is broken, mortality rate, up to 50% ~ 80%, is a kind of and dangerous disease, is of great significance so carry out Clinical intervention tool before rupture of abdominal aorta.

In the process of Minimally Interventional Therapy arotic disease, usually utilize inner cavity insulation principle, i.e. EVAR (endovascular aneurysm repair, EVAR), adopt overlay film frame to completely cut off blood flow and aortic aneurysm or dissection of aorta.At present aorta tectorial membrane stent is in the industry primarily of tinsel and PET (pet resin) film covered thereon or ePTFE (politef) film composition, cylinder-shaped bracket skeleton made by tinsel, and it covers PET film or ePTFE film.

The most of intraluminal stents being used for the treatment of aortic aneurysm comprise overlay film frame section and are communicated with this overlay film frame section the bare bracket section be connected, overlay film frame section is used for isolated blood flow and aortic aneurysm or dissection of aorta, bare bracket section is for the support grappling performance of the adherent property and aorta vessel overlay film frame near-end that improve mount proximal end, prevent in the displacement of overlay film frame section and mount proximal end art, postoperative I type internal hemorrhage due to trauma, for the support for ventral aorta, bare bracket section can be avoided cutting off flowing into arteriorenal blood flow simultaneously.

For abdominal aortic aneurysm as shown in Fig. 1 a, 1b, Fig. 1 a is the good situation of proximal landing zone form, Fig. 1 b is the poor situation of proximal landing zone form, EVAR operation has certain requirement to proximal landing zone form, require near-end tumor neck length degree H (referring to the Normal aorta segment length between tumor body near-end and nearlyer renal artery) >=15mm, now due to the improvement of support and the raising of technology, near-end tumor neck length degree can be loosened to H >=10mm; Tumor neck angle [alpha] on near-end kidney (refer on near-end tumor neck axis and kidney between ventral aorta trunk axis angle) should≤60 °, and under kidney, tumor neck angle beta (referring to angle between near-end tumor neck axis and axis, tumor chamber) should≤70 °.Tumor neck is shorter, can be less for the region of overlay film frame grappling, and in art, the probability of postoperative generation near-end I type internal hemorrhage due to trauma, the complication such as graft displacement is higher.Tumor neck angle is larger, adapts to regard to needing the better support of compliance.A kind of technology addressed this problem in the industry be at present near-end bare bracket across renal artery technology, discharged across renal artery by the near-end bare bracket of overlay film frame blood vessel, the bare bracket be suitable for is divided into is not with anchor to sting bare bracket and band anchor thorn bare bracket two class.Be not with anchor to sting bare bracket and mostly be individual pen wavy annular thing, cylindrical or bell mouth shape, the clinical near-end tumor neck length degree that is mainly used in is greater than 15mm, tumor neck form rule, the situation of a good touchdown area can be provided for it, but this type of bare bracket is only fitted by circumferential active force and blood vessel because of it, having the shortcoming of anchoring properties difference, still occurring shifting phenomena than being easier at operation process or postoperative period.

For the case of tumor neck shorter (between 10mm < H < 14mm), usual employing band anchor thorn bare bracket carries out on kidney fixing, anchor thorn structure penetrates in blood vessel wall, can be firm fix support, prevent the displacement in support long term, the subject range of abdominal aortic aneurysm intracavitary therapy has not more been widened in this kind of design with anchor thorn bare bracket.Band anchor thorn bare bracket can be divided into again individual pen structure and multi-turn structure (being generally in the industry two circles at present) according to its basic composition structure, wherein individual pen structure is the wavy annular thing that a circle is provided with anchor thorn, be applied to clinical complicated bend vascular anatomy form, when after support release, because its axial length is shorter, bare bracket there will be a side anchor and stings excessive docile blood vessel wall, and another side anchor thorn is separated and unsettled state with blood vessel wall, thus affects its grappling performance.

The multi-turn structure with multi-turn wavy annular thing can avoid above-mentioned shortcoming, but the connection between adjacent waveform ring then can bring new problem, linked together by rigid connector between current adjacent turn wavy annular thing, such as, in adjacent wavy annular thing, proximal apices in the far-end summit of one of them wavy annular thing and another wavy annular thing is all connected with metal thin bar, this rigid connection adds the integrated connection rigidity of bare bracket, avoid support cripetura, but cause the problem that its compliance is poor, bare bracket is difficult to the change adapting to blood vessel angle, larger stress can be applied for a long time to blood vessel wall after implantation, increase the probability of happening of complication.

Utility model content

The technical problems to be solved in the utility model is, for defect above-mentioned in prior art, provides a kind of and can improve support compliance and keep the intraluminal stent of the axial bonding strength of support.

This utility model solves the technical scheme that its technical problem adopts: a kind of intraluminal stent, the overlay film frame section comprising bare bracket section and be connected with described bare bracket section, described bare bracket section comprises at least two coaxial wavy annular things and rigid connector, described bare bracket section also comprises flexible couplings that is nonelastic and that can bend arbitrarily, two wavy annular things often adjacent in described at least two wavy annular things are connected with described flexible couplings by described rigid connector, described rigid connector mixes with described flexible couplings and arranges in the circumferential, the length of described flexible couplings is slightly larger than the shortest spacing between two wavy annular things.

Each described wavy annular thing comprises the support portion of multiple continuous end to end formation waveform, all support zones are arranged on the same face of cylinder, about axis axial symmetry, and head and the tail junction, multiple support portion forms multiple proximal apices and multiple far-end summit; A proximal apices of a wavy annular thing in two adjacent wavy annular things is connected by rigid connector or flexible couplings with a far-end summit of another wavy annular thing.

Described at least two wavy annular things comprise near-end wavy annular thing and far-end wavy annular thing, and the waveform phase between adjacent near-end wavy annular thing and far-end wavy annular thing is asynchronous; Or the ripple that the ripple of near-end wavy annular thing is wider than far-end wavy annular thing is wide.

Described rigid connector and described flexible couplings staggered.

The structure that described wavy annular thing and described rigid connector are formed in one.

Described rigid connector is obliquely installed relative to the axis of described bare bracket section and is located on the same face of cylinder.

The angle δ of the circumference that described rigid connector is vertical with described bare bracket section axis is 20 ° ~ 45 °.

Each wavy annular thing is equipped with the connecting hole for fixing described flexible couplings.

Described flexible couplings is that sub-thread has high tensile, compatible with human body silk thread; Or described flexible couplings is the blends of one or more silk threads through multiply blending.

Described flexible couplings is the blend of sub-thread silk thread or the multiply blending woven by least one in PE, PTFE, PET and PP.

Described wavy annular thing comprises connectionless at least one group of unsettled proximal apices and/or at least one group of unsettled far-end summit with adjacent waveform ring, often organize unsettled proximal apices and comprise 1 unsettled proximal apices or 2 adjacent unsettled proximal apices, often organize unsettled far-end summit and comprise 1 unsettled far-end summit or 2 adjacent unsettled far-end summits.

Described rigid connector bare bracket section axially in the shape of a spiral or straight line arrangement; And/or described flexible couplings bare bracket section axially in the shape of a spiral or straight line arrangement.

The proximal top of described bare bracket section is provided with anchor thorn, and described anchor thorn part is towards the far-end of bare bracket section.

In intraluminal stent of the present utility model, between the adjacent waveform ring of bare bracket section except being connected by rigid connector, flexible couplings is also adopted to connect.Because flexible couplings is nonelastic, can bend arbitrarily, be rigidly connected with soft connection and deposit, meeting intraluminal stent axial tensile strength and preventing on the basis of cripetura, the use of flexible couplings, add the bending compliance of intraluminal stent, also can guarantee simultaneously support integral shaft to bonding strength.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:

Fig. 1 a is the kidney mo(u)ld bottom half abdominal aortic aneurysm schematic diagram of proximal landing zone form specification;

Fig. 1 b is the proximal landing zone form relatively nonstandard kidney mo(u)ld bottom half abdominal aortic aneurysm schematic diagram of relative Fig. 1 a;

Fig. 2 is this utility model intraluminal stent structural representation;

Fig. 3 is the structural representation of the first embodiment of bare bracket section;

Fig. 4 is the plane outspread drawing of Fig. 3 bare bracket section;

Fig. 5 a, 5b are the partial schematic diagram in Fig. 4;

Fig. 6 is the partial schematic diagram in Fig. 4;

Fig. 7 is that in Fig. 2, intraluminal stent is discharged into the schematic diagram after ventral aorta;

Fig. 8 is the bare bracket segment structure schematic diagram of the second embodiment;

Fig. 9 is the plane outspread drawing of Fig. 8 bare bracket section;

Figure 10 is the partial schematic diagram in Fig. 9;

Figure 11 is bare bracket section and main body overlay film frame connection diagram in Fig. 9;

Figure 12 is that in Figure 11, intraluminal stent is discharged into the schematic diagram after ventral aorta;

Figure 13 is the structural representation of the third embodiment of bare bracket section;

Figure 14 is the plane outspread drawing of Figure 13 embodiment bare bracket;

Figure 15 is the structural representation of bare bracket section the 4th kind of embodiment;

Figure 16 is the plane outspread drawing of Figure 15 embodiment bare bracket.

Detailed description of the invention

In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing, describe detailed description of the invention of the present utility model in detail for ventral aorta support.Those of ordinary skill in the art should know, this ventral aorta support is only with for example, not to restriction of the present utility model, intraluminal stent of the present utility model is the overlay film intraluminal stent arbitrarily with bare bracket, include but not limited to ventral aorta support, also comprise thoracic aorta support, iliac artery support etc.

Bearing definition: this utility model flows to definition orientation according to blood, and namely blood proximally flows to far-end.

As shown in Figure 2, a kind of intraluminal stent, the overlay film frame section 20 comprising bare bracket section 10 and be connected with bare bracket section 10, bare bracket section 10 comprises at least two coaxial wavy annular things 100 and rigid connector 130, bare bracket section 10 also comprises flexible couplings 131 that is nonelastic and that can bend arbitrarily, two wavy annular things 100 often adjacent at least two wavy annular things 100 are connected with flexible couplings 131 by rigid connector 130, rigid connector 130 mixes with flexible couplings 131 and arranges in the circumferential, the length of flexible couplings 131 is slightly larger than the shortest spacing between two wavy annular things 100.

As shown in Figure 2, overlay film frame section 20 in intraluminal stent comprises overlay film 201 and metallic framework 202, metallic framework 202 can adopt biocompatible SIM (stress-induced martensite) alloy to make, such as Nitinol, its shape may also be multiple wavy annular thing axially arranged, and the mode that overlay film 201 pastes through Overheating Treatment or sews up and metallic framework 202 connect as one.The concrete structure of overlay film frame section 20 is as broad as long with other overlay film frame section in prior art, does not repeat them here.The sinusoidal wave form that in the present embodiment, metallic framework 202 is shaped for titanium-nickel wire braiding or the cutting of NiTi pipe is axially arranged.Overlay film 201 is PFFE (politef, or PET (polyethylene terephthalate Polytetrafluoroethylene), Polythylene terephthalate) material, the mode pasting through Overheating Treatment or sew up and metallic framework 202 connect as one.

Bare bracket section 10 in intraluminal stent is arranged at overlay film frame section 20 near-end, and the far-end of bare bracket section 10 and the overlay film of overlay film frame section 20 near-end are stitched together.Bare bracket section 10 comprises at least two coaxial wavy annular things 100, wherein coaxially refer to and be all arranged on intraluminal stent axially in bare bracket section 10 and overlay film frame section 20, the two has a common axis, and at least two wavy annular things 100 of bare bracket section 10 are all symmetrical arranged about this axis.These wavy annular things 100 have same or analogous waveform shape, and such as, wavy annular thing 100 can be Z-shaped ripple, V-arrangement ripple or sine wave etc.Wavy annular thing 100, rigid connector 130 can separately molding separately, then linked together by welding, the mode such as bonding, also can wavy annular thing 100 and rigid connector 130 be formed in one make bare bracket section 10, such as adopt NiTi pipe integral cutting, and adopt mould to form a bare bracket section 10 through multistep thermal finalization.The diameter of the NiTi pipe adopted can be determined according to the vessel diameter of concrete placement location, and such as NiTi pipe diameter is 5mm.

Each wavy annular thing 100 comprises the support portion 112 of multiple continuous end to end formation waveform, and all support portions 112 are positioned on the same face of cylinder, about axis axial symmetry and arrange, and namely wavy annular thing 100 forms cylindrical-shaped structure.Head and the tail junction, multiple support portion 112 forms multiple proximal apices and multiple far-end summit; These proximal apices are the crests in whole waveform, and far-end summit is the trough in whole waveform.A proximal apices of a wavy annular thing 100 in two adjacent wavy annular things 100 is connected by rigid connector 130 or flexible couplings 131 with a far-end summit of another wavy annular thing 100.In the circumferential, rigid connector 130 and flexible couplings 131 mix arrangement, namely the arrangement of rigid connector 130 and flexible couplings 131 is not concentrated setting, and the connection of rigid connector 130 and flexible couplings 131 selects one on a certain position, namely the position adopting rigid connector 130 to connect can not connect flexible couplings 131 again, selects rigid connector 130 to connect when adopting the position of flexible couplings 131 different.Like this, rigid connector 130 is middle in the circumferential just can reduce the integrally bending rigidity of rigid connector 130 doped with flexible couplings 131, increases the compliance of intraluminal stent.

Rigid connector 130 refers to the connector with certain degree of hardness and bending compliance, and rigid connector 130 has the connector of support function and linkage function simultaneously.The rigidity of rigid connector 130 can be avoided support cripetura and provide support integral shaft bonding strength upwards, also assures that intraluminal stent entirety has certain bending compliance simultaneously.Flexible couplings 131 is nonelastic, tensionless winkler foundation is out of shape, the connector that can bend arbitrarily, therefore flexible couplings 131 mainly has connection constraints function, namely the proximal apices of wavy annular thing 100 and distal tip point are played to the effect of constraint, in intraluminal stent BENDING PROCESS, because the length of flexible couplings 131 is slightly larger than the shortest spacing between two wavy annular things 100, flexible couplings 131 retrains the proximal apices of wavy annular thing 100 and flexural deformation is complied with along with bending in far-end summit, add the compliance of whole intraluminal stent, blood vessel wall is thrust to avoid relatively sharp-pointed proximal apices and distal tip point, damage is produced to blood vessel.

In the mixing arrangement of rigid connector 130 and flexible couplings 131, preferably rigid connector 130 is staggered with flexible couplings 131 in the circumferential.Staggeredly refer to regular doping flexible couplings 131 in rigid connector 130, such as the one or more rigid connector 130 in the upper interval of circumference is just provided with flexible couplings 131, flexible couplings 131 can arrange one or more continuously, no more than three of the continuous magnitude setting of general rigid connector 130 and flexible couplings 131, avoids local stiffness to cross strong or rigidity is excessively weak.

Rigid connector 130 is column or rod-like structure on the whole, its shape can be multiple, such as linear, arc, shaped form etc., its cross sectional shape can be square or other irregular shape etc. without sharp corner after circular, oval, chamfering, diameter or width calcaneus branches support part 112 consistent.The material of rigid connector 130 is biocompatibility metal, or other materials that may be used for intraluminal stent are made.Preferred nickel/titanium alloy material in the present embodiment.

The waveform of each wavy annular thing 100 can be the same or different, wave peak width can be the same or different, then make the orientation of rigid connector 130 arrange and have difference relative to the axis of intraluminal stent, such as: arrange relative to axis parallel, be obliquely installed relative to axis, wherein some rigid connector 130 is obliquely installed relative to the axis of bare bracket section 10 and is located on the same face of cylinder.Rigid connector 130 is restricted relative to the incline direction of axis, is limited to same face of cylinder surface thereof, instead of inside or outward-dipping.The angle of inclination of preferred rigid connector 130 is: the angle δ of the circumference that rigid connector 130 is vertical with bare bracket section 10 axis is 20 ° ~ 45 °.Relative to the rigid connector 130 being parallel to axis setting, rigid connector 130 compliance be obliquely installed is better, such as when bracket bent, if rigid connecting rod is parallel to axis, then rigid connector 130 will be all stressed, if and relative tilt, then only can be stressed near Bending Deformation place; In addition, rigid connector 130 is obliquely installed to be engaged in and axially forms helical arrangement, improves the bending compliance of support entirety further.

Using flexible couplings 131 to carry out the position connected, each wavy annular thing 100 is equipped with the connecting hole (such as connecting hole 116 and 123) for fixing flexible couplings 131.The position of connecting hole is on the proximal apices of wavy annular thing 100 or far-end summit.

Flexible couplings 131 can adopt flexible flexible cord, that flexible couplings 131 has high tensile for sub-thread, compatible with human body silk thread; Or flexible couplings 131 is the blends of one or more above-mentioned silk threads through multiply blending.Above-mentioned silk thread can be made for macromolecular material, the material of such as flexible couplings 131 is have the PE (polyethylene compared with high tensile, polyethylene), PTFE (politef, Polytetrafluoroethylene), PET (polyethylene terephthalate, Polythyleneterephthalate), PP (polypropylene, Polypropylene) suture of material or other medical sutures and combination suture thereof can be sub-thread also can be the blend of the identical or different material blending of multiply.Preferred flexible couplings 131 is the blend of multiple silk thread multiply blending, is proved by test: adopt blend relative to homogenous material, has and connects more reliably and hot strength, be more suitable for for the connection of bare bracket section 10 and knotting fixing.The flexible couplings 131 adopted in the present embodiment is combined by super high molecular weight PE and PP suture, PE, PP suture adopts braiding structure, this combination sew up relative to other most polyester fibers and polyblend cross section more smooth, easily beat less knot, and knotting is more solid, has higher hot strength in addition.

The proximal top of bare bracket section 10 is provided with anchor thorn 114, and anchor stings 114 far-ends towards bare bracket section 10.On the proximal apices of the wavy annular thing 100 of bare bracket section 10 near-end, be specifically provided with anchor thorn 114, Figure 7 shows that intraluminal stent be discharged into ventral aorta 1 after schematic diagram, after release, the anchor thorn 114 of near-end wavy annular thing 110 is positioned at renal artery more than 2, its anchor thorn 114 thrusts in aortic blood tube wall, ensures the reliable grappling of intraluminal stent near-end; Near-end wavy annular thing 110 and far-end multi-turn ripple circle 120 stride across renal artery, ensure the normal supply of blood flow of renal artery; Overlay film near-end is positioned on the downside of renal artery.

As shown in Fig. 3-16, wavy annular thing 100 can comprise near-end wavy annular thing 110 and far-end wavy annular thing 120, and the waveform phase between adjacent near-end wavy annular thing 110 and far-end wavy annular thing 120 is asynchronous; Or the ripple that the ripple of near-end wavy annular thing 110 is wider than far-end wavy annular thing 120 is wide.Setting like this can be beneficial to rigid connector 130 and relatively tilt (not parallel) in axis, thus the bending compliance of support entirety is improved, also be beneficial to rigid connector 130 and coordinate formation helical form in the axial direction, improve the bending compliance of support entirety further.Certainly, illustrated embodiment only with for example, near-end wavy annular thing 110 with the ripple of far-end wavy annular thing 120 is wide can be identical, waveform phase can be synchronous.

The following embodiment that multiple different bare bracket section 10 is specifically described in detail in detail according to different wave ring 100 arrangement mode:

The first embodiment: as shown in fig. 3 to 7, bare bracket section 10 comprises two wavy annular things 100, is respectively near-end wavy annular thing 110 and far-end wavy annular thing 120, and wavy annular thing 100 can be Z-shaped ripple, V-arrangement ripple or sine wave etc.

As in Figure 3-5, the support portion 112 of near-end wavy annular thing 110, the Z-shaped ripple of end to end formation, proximal apices 111a and far-end summit 111b, proximal apices 111a, 111b place, far-end summit respectively transition form a circular arc 115a, 115b, far-end summit place arranges connecting hole 116.The present embodiment forms 6 Z waveform element, and as shown in Figure 5 a, waveform height h1 (vertical dimension between proximal apices 111a to far-end summit 111b) is 9mm.

As Fig. 3,4, shown in 5a, 5b, proximal apices 111a proximally direction is extended with anchor thorn post 113, anchor thorn post 113 is provided with and sting the integrally formed anchor of post 113 with anchor and sting 114, it is outstanding from anchor thorn post 113 near-end circumference that anchor thorn 114 is arranged, and extension sensing far-end, sting post 113 surface with anchor and become angle γ, as shown in Figure 5 b, angle γ is between 20 ° ~ 60 °, and preferred angle γ is 45 °, anchor stings 114 length between 2mm ~ 5mm, preferred 3mm.During use, anchor thorn 114 can thrust Ink vessel transfusing, thrusts position inner membrance and can climb and cover, can realize mount proximal end in this way and fix reliably, avoid displacement in stenting and at a specified future date.

Far-end wavy annular thing 120 comprises proximal apices 121a, far-end summit 121b and the support portion 112 between adjoining endvertex 121a and far-end summit 121b.Far-end wavy annular thing 120 waveform number is greater than near-end wavy annular thing 110 waveform number, and be 9 waveforms, but the cylinder girth enclosing formation is substantially equal, therefore ripple reductions is few, and waveform height is equal with near-end wavy annular thing 110, is also 9mm.Proximal apices 121a place arranges connecting hole 123.

Near-end wavy annular thing 110 and far-end wavy annular thing 120 are linked together by 3 inclination rigid connectors 130 and 3 flexible couplings 131, is fixed with flexible couplings 131 between connecting hole 116, connecting hole 123.As shown in Figure 6, the angle δ of the circumference that rigid connector 130 is vertical with bare bracket section 10 axis is 20 ° ~ 45 °, is 30 ° in this example.

As shown in Figure 3,4,121b place, far-end wavy annular thing 120 far-end summit arranges sewing hole 124, is used for overlay film 201 near-end of bare bracket and intraluminal stent to link together.

As shown in Figure 2, overlay film frame section 20 comprises overlay film 201 and metallic framework 202, the sinusoidal wave form that metallic framework 202 weaves for titanium-nickel wire, overlay film 201 is PFFE (politef, or PET (polyethylene terephthalate Polytetrafluoroethylene), Polythyleneterephthalate) material, the mode pasting through Overheating Treatment or sew up connects as one.

Figure 7 shows that intraluminal stent be discharged into ventral aorta 1 after schematic diagram, after release, near-end wavy annular thing 110 is positioned near on the upside of renal artery 2, and its anchor thorn 114 thrusts in the aortic blood tube wall on the upside of renal artery 2, ensures the reliable grappling of intraluminal stent near-end; Near-end wavy annular thing 110 and far-end wavy annular thing 120 stride across renal artery, ensure the normal supply of blood flow of renal artery; The near-end of overlay film frame section 20 is positioned on the downside of renal artery.

The second embodiment of bare bracket section 10: bare bracket section 10 adopts the wavy annular thing 100 more than two, i.e. near-end wavy annular thing 110, a two or more far-end wavy annular thing 120.

Near-end wavy annular thing 110 structure, with the first embodiment, does not repeat them here.

Relative to the first embodiment, the setting of multiple far-end wavy annular thing 120 adds the overall draw ratio of bare bracket section 10, have better compliance, comply with more complicated tumor neck angle, longer bare bracket segment length can make near-end wavy annular thing 110 enter into ventral aorta flat segments on kidney simultaneously, adherent property is better, and near-end grappling is more stable.Far-end wavy annular thing 120 and intraluminal stent near-end overlay film 201 position of distalmost end are stitched together.Wherein near-end wavy annular thing 110 can be arranged as required, such as can be identical with near-end wavy annular thing 110 structure in the first embodiment.

Figure 9 shows that the planar development schematic diagram of the bare bracket section 10 of the second embodiment.Multiple far-end wavy annular thing 120 vertically parallel arrangement in the far-end of near-end wavy annular thing 110, waveform position either in phase with one another and ripple is wide equal, 6 far-end wavy annular things 120 are set in the present embodiment, adjacent distal end wavy annular thing 120 axial component is overlapping, arrange in fish scale-shaped, the spacing between the proximal apices of two namely adjacent wavy annular things 100 or far-end summit is less than waveform height.As shown in Figure 10, overlap distance is that d is preferably 1/3 ~ 2/3 waveform height, and in the present embodiment, overlap distance is d is 1/2 waveform height.In the present embodiment, each far-end wavy annular thing 120 is made up of 9 Z-shaped waveforms.Each waveform height is 8.0mm, and between former and later two far-end wavy annular things 120, overlap distance is 4mm.Linked together by 3 rigid connectors 130 and 3 flexible flexible couplings 131 between adjacent two far-end wavy annular things 120 in far-end wavy annular thing 120.Rigid connector 130 forms with the overall cut of support, and flexible flexible cord adopts the blend of PE+PP combination, and flexible couplings 131 connected mode is connected by connecting hole.

Rigid connector 130 in this example between multiple far-end wavy annular thing 120 is linearly shape setting in the axial direction, namely the rigid connector 130 between adjacent distal end wavy annular thing 120 is parallel to axis, and axially adjacent rigid connector 130 is arranged on the same line.As shown in Figure 9, the flexible flexible couplings 131 in this example between far-end wavy annular thing 120 is linearly shape setting also.In the circumferential, rigid connector 130 and flexible couplings 131 staggered, be namely provided with a flexible couplings 131 between two rigid connectors 130.

The connected mode of first far-end wavy annular thing 120 of near-end wavy annular thing 110 and near-end is identical with the connected mode of far-end wavy annular thing 120 with near-end wavy annular thing 110 in the first embodiment.In order to ensure the axial bonding strength between near-end wavy annular thing 110 and far-end wavy annular thing 120, far-end wavy annular thing 120 is provided with the proximal apices of rigid connector 130 and near-end wavy annular thing 110 far-end summit is linked together by the rigid connector 130 tilted, do not change the shape of near-end wavy annular thing 110 waveform, and ensureing that near-end wavy annular thing 110 waveform is circumferentially evenly distributed, rigid connector 130 is 30 ° with the angle of bare bracket section 10 axis.

As shown in Fig. 8,9,11, the far-end wavy annular thing 120 of distalmost end can be identical with other far-end wavy annular thing 120, and also can be that waveform number is identical, waveform height be slightly high.In the present embodiment, far-end wavy annular thing 120 waveform height of distalmost end is 9mm, and the far-end wavy annular thing 120 far-end summit place of distalmost end arranges sewing hole 124, is used for overlay film 20 near-end of bare bracket section 10 with intraluminal stent to link together.

Figure 12 shows that intraluminal stent be discharged into ventral aorta 1 after schematic diagram, after release, near-end wavy annular thing 110 is positioned at renal artery more than 2, and its anchor thorn 214 thrusts in aortic blood tube wall, ensures the reliable grappling of intraluminal stent near-end; Far-end wavy annular thing 120 strides across renal artery 2, ensures the normal supply of blood flow of renal artery; Overlay film frame section 20 near-end is positioned on the downside of renal artery.

The third embodiment: as shown in Figure 13,14, the third embodiment is the distortion on the second embodiment basis, is changed by the arrangement mode of the rigid connector 130 between multiple far-end wavy annular thing 120 and flexible couplings 131.Each rigid connector 130 and flexible couplings 131 are parallel to axis, rigid connector 130 in bare bracket section 10 axially in the shape of a spiral; And/or flexible couplings 131 in bare bracket section 10 axially in the shape of a spiral.

In present embodiment, linked together by 3 rigid connectors 130 and 3 flexible couplings 131 between adjacent distal end wavy annular thing 120.In axis twist, axially former and later two rigid connectors 130 are not on the same line for rigid connector 130 in this example between far-end wavy annular thing 120, and one, interval waveform distance is arranged in the circumferential.In such arrangement mode, when the bare bracket section 10 of near-end bends, bending resistance between adjacent two wavy annular things 100 on same axis comparatively the second embodiment reduces further, can further improve the compliance of intraluminal stent, adapts to more complicated tumor neck form; Flexible couplings 131 between far-end wavy annular thing 120 also twist.In circumference, rigid connector 130 and flexible couplings 131 same one, interval waveform distance.

Near-end wavy annular thing 110 structure can be identical with the first embodiment, do not repeat them here.

4th kind of embodiment: is as shown in Figure 15,16 that in the present embodiment, near-end bare bracket section 10 comprises a near-end wavy annular thing 110, two or more far-end wavy annular thing 120.Wherein near-end wavy annular thing 110 is identical with near-end wavy annular thing 110 structure in the first embodiment.

As shown in figure 16, far-end wavy annular thing 120 is made up of 9 waveforms, have between two far-end wavy annular things 120 in three circumferences and be uniformly distributed and the rigid connector 130 tilted, the rigid connector 130 of inclination connects the far-end summit 121b of first far-end wavy annular thing 120 and proximal apices 121a of adjacent second far-end wavy annular thing 120.In circumference, between two rigid connectors 130, linked together by flexible couplings 131.The proximal apices 121a that flexible couplings 131 connects is provided with connecting hole 116, and far-end summit 121b is provided with connecting hole 123, for being connected and fixed of flexible couplings 131.The height of near-end and middle far-end wavy annular thing 120 waveform is 9mm.

The far-end wavy annular thing 120 of distalmost end is identical with the waveform quantity of near-end wavy annular thing 110, waveform height is slightly larger than far-end wavy annular thing 120 waveform height, waveform height is 10mm, the far-end wavy annular thing 120 far-end summit place of distalmost end arranges sewing hole 124, and is used for bare bracket and overlay film frame section to link together.

Connected mode between near-end wavy annular thing 110 with far-end wavy annular thing 120 is identical with the connected mode between adjacent far-end wavy annular thing 120,3 rigid connectors 130 tilted all only are adopted to connect, and with the rigid connector 130 of far-end wavy annular thing 120 in circumferential formation helical form.

In present embodiment, wavy annular thing 100 comprises connectionless at least one group of unsettled proximal apices 125 and/or at least one group of unsettled far-end summit 126 with adjacent waveform ring 100, often organize unsettled proximal apices 125 and comprise 1 unsettled proximal apices or 2 adjacent unsettled proximal apices, often organize unsettled far-end summit 126 and comprise 1 unsettled far-end summit or 2 adjacent unsettled far-end summits.These unsettled far-end summits 126 and unsettled proximal apices 125 save a part of rigid connector 130 in bare bracket section 10, make to be in vacant state between the segment distal summit of above-mentioned adjacent wavy annular thing 100 and proximal apices, integrally bending rigidity can be reduced, this part unsettled far-end summit 126 and unsettled proximal apices 125 can be close to blood vessel wall and even slightly thrust blood vessel wall because of chainless, add the grappling of intraluminal stent.Meanwhile, the quantity organizing unsettled summit in unsettled far-end summit or unsettled proximal apices because of each is no more than 2, both sides have rigid connector and flexible couplings to retrain in the circumferential, and therefore the above-mentioned waveform with unsettled summit can not significantly overturn and go deep into producing new damage in blood vessel wall, to blood vessel.All the other structures, with the first embodiment, do not repeat them here.

Second-four kinds embodiment is all the quantity adding far-end wavy annular thing 120 on the first embodiment basis, far-end wavy annular thing 120 is arranged near on the downside of renal artery and renal artery, for the vascular morphology that angle on kidney is larger, far-end wavy annular thing 120 flows into renal artery except requiring to avoid cutting off, outside the blood flow of Mesenteric artery, also need to there is good compliance to comply with blood vessel, therefore rigid connector 130 be obliquely installed the compliance both increasing intraluminal stent with flexible couplings 131, bare bracket overall length increases simultaneously, proximal annular thing can be made to be positioned at the more straight arteries of more than renal artery, enable its anchor sting 114 structures and penetrate Ink vessel transfusing completely, there is good adherent performance and sweep resistance energy.

For adapting to vessel size difference, the patient that position is different, according to adult's ventral aorta diameter situation, this utility model can be designed to different model specification.Each several part equal diameters in following embodiment, or in horn mouth form, diameter is 20mm to 36mm, such as, can be preferably 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 33mm and 36mm, and total length is 30 to 60mm.

Claims (10)

1. an intraluminal stent, the overlay film frame section comprising bare bracket section and be connected with described bare bracket section, described bare bracket section comprises at least two coaxial wavy annular things and rigid connector, it is characterized in that, described bare bracket section also comprises flexible couplings that is nonelastic and that can bend arbitrarily, two wavy annular things often adjacent in described at least two wavy annular things are connected with described flexible couplings by described rigid connector, described rigid connector mixes with described flexible couplings and arranges in the circumferential, the length of described flexible couplings is slightly larger than the shortest spacing between two wavy annular things.

2. intraluminal stent according to claim 1, it is characterized in that, each described wavy annular thing comprises the support portion of multiple continuous end to end formation waveform, all support zones are arranged on the same face of cylinder, about axis axial symmetry, and head and the tail junction, multiple support portion forms multiple proximal apices and multiple far-end summit; A proximal apices of a wavy annular thing in two adjacent wavy annular things is connected by rigid connector or flexible couplings with a far-end summit of another wavy annular thing.

3. intraluminal stent according to claim 2, is characterized in that, described at least two wavy annular things comprise near-end wavy annular thing and far-end wavy annular thing, and the waveform phase between adjacent near-end wavy annular thing and far-end wavy annular thing is asynchronous; Or the ripple that the ripple of near-end wavy annular thing is wider than far-end wavy annular thing is wide.

4. intraluminal stent according to claim 1, is characterized in that, in the circumferential described rigid connector and described flexible couplings staggered.

5. intraluminal stent according to claim 1, is characterized in that, described rigid connector is obliquely installed relative to the axis of described bare bracket section and is located on the same face of cylinder.

6. intraluminal stent according to claim 2, is characterized in that, the angle δ of the circumference that described rigid connector is vertical with described bare bracket section axis is 20 ° ~ 45 °.

7. intraluminal stent according to claim 1, is characterized in that, described flexible couplings is that sub-thread has high tensile, compatible with human body silk thread; Or described flexible couplings is the blends of one or more silk threads through multiply blending.

8. intraluminal stent according to claim 7, is characterized in that, described flexible couplings is the blend of sub-thread silk thread or the multiply blending woven by least one in PE, PTFE, PET and PP.

9. intraluminal stent according to claim 2, it is characterized in that, described wavy annular thing comprises connectionless at least one group of unsettled proximal apices and/or at least one group of unsettled far-end summit with adjacent waveform ring, often organize unsettled proximal apices and comprise 1 unsettled proximal apices or 2 adjacent unsettled proximal apices, often organize unsettled far-end summit and comprise 1 unsettled far-end summit or 2 adjacent unsettled far-end summits.

10. intraluminal stent according to claim 1, is characterized in that, described rigid connector bare bracket section axially in the shape of a spiral or straight line arrangement; And/or described flexible couplings bare bracket section axially in the shape of a spiral or straight line arrangement.