CN205198216U - Support is woven to lumen - Google Patents

Abstract

The utility model relates to a support is woven to lumen, including and weaving the netted body of formation by weaving the silk, netted body includes first portion and second portion along the axial, netted body still includes a plurality of first colluding around the knot, every at least two tip that come from the second portion weave the silk along the axial of netted body collude each other around form one first collude around the knot back separately, all constitute first colluding and weave the formation first portion around the silk of weaving of knot, the net porosity of first portion is less than the net porosity of second portion. Above -mentioned support is woven to lumen is because the net porosity of first portion is less than the net porosity of second portion to the radial holding power that makes the first portion reduces, reduces the first portion to the stimulation of normal lumen wall, thereby reduces the risk of restenosis. In addition, the first portion has good compliance, and the second portion has great radial holding power and provide sufficient anchoring, and consequently, above -mentioned support is woven to lumen is applicable to actual implantation well.

Description

Tube chamber braided support

Technical field

This utility model relates to technical field of medical instruments, particularly relates to a kind of tube chamber braided support.

Background technology

Tube chamber braided support has radial compression and radial expansion state in use, use the middle lesion locations tube chamber braided support of radial compression being delivered to body lumen by conveyer device, then tube chamber braided support is discharged, tube chamber braided support automatic expansion is launched or launches (such as being launched by balloon expandable) mechanically and attach with wall of the lumen, the radial support power of tube chamber braided support self is relied on to provide support wall of the lumen, play the effect of expansion pathological lumen wall, thus it is unobstructed to maintain tube chamber.

In prior art, tube chamber braided support generally includes and weaves by least one braided wires the netted body formed, and this netted body has uniform braiding structure.But, after tube chamber braided support implant into body, open end attaches normal wall of the lumen usually, bracket body part attaches tube chamber lesion region, for guaranteeing effectively to expand pathological lumen, support needs to have larger radial support power to provide enough grapplings, but simultaneously larger radial support power can produce larger stimulation to normal lumina, the open end of such as support will produce larger stimulation to normal lumina, this will strengthen the body reaction of body foreign body to external world, improves the risk of restenosis.In addition, the pattern individual variation of body lumen is obvious, at the tube chamber position of complications, support need have good compliance, and at level and smooth tube chamber position, support need have larger radial support power and provide enough grapplings, and to sum up, the support of integral weaving even structure can not be applicable to actual implantation well.

Utility model content

Based on this, be necessary the problem that can not be applicable to actual implantation for traditional tube chamber braided support well, a kind of tube chamber braided support being applicable to actual implantation is well provided.

This utility model provides a kind of tube chamber braided support, and comprise and weave by braided wires the netted body formed, described netted body comprises Part I and Part II vertically; Described netted body also comprises multiple first and hooks around knot, every at least two braided wires from an end of Part II are separated along axially mutual hook of netted body around described first hook of formation one after knot, and the braided wires braiding that all formations described first hook around tying forms described Part I; The mesh density of described Part I is less than the mesh density of described Part II.

According in the tube chamber braided support of this utility model embodiment, described multiple first circumference hooked around tying along described netted body is uniformly distributed.

According in the tube chamber braided support of this utility model embodiment, described netted body comprises multiple Part II, and described multiple Part II is intervally arranged vertically, all hooks by multiple first and link together around knot between every two adjacent described Part II.

According in the tube chamber braided support of this utility model embodiment, described netted body also comprises multiple second vertically and hooks around knot and Part III, described Part III and described Part I lay respectively at the two ends of described Part II, every at least two braided wires from the other end of Part II mutually hook and hook around knot separately rear around formation one described second, and all described second hooks the described Part III of braided wires braiding formation around knot.

According in the tube chamber braided support of this utility model embodiment, the mesh density of described Part III is different from the mesh density of described Part II.

According in the tube chamber braided support of this utility model embodiment, described multiple second circumference hooked around tying along described netted body is uniformly distributed.

According in the tube chamber braided support of this utility model embodiment, the mesh density of described Part I is identical with the mesh density of described Part III.

According in the tube chamber braided support of this utility model embodiment, described netted body comprises multiple Part III, and described multiple Part III is intervally arranged vertically, all hooks by multiple second and link together around knot between every two adjacent described Part III.

According in the tube chamber braided support of this utility model embodiment, described Part I comprises tapered opening end, and the path length of described tapered opening end increases from the side near described Part II gradually to the side away from described Part II.

According in the tube chamber braided support of this utility model embodiment, the subtended angle of described tapered opening end is 45-120 degree.

According in the tube chamber braided support of this utility model embodiment, the described first at least two described braided wires hooked in knot hook around once mutually; Or the described first at least two described braided wires hooked in knot hook around to few twice mutually continuously;

When described netted body comprise multiple second hook around knot time, described second to hook in knot two described braided wires hooks around once; Or described second hooks two described braided wires in knot hooks continuously around to few twice.

Above-mentioned tube chamber braided support, the mesh density due to Part I is less than the mesh density of Part II, thus the radial support power of Part I is reduced, and can reduce the stimulation of Part I to normal wall of the lumen, thus reduces the risk of restenosis.In addition, Part I has good compliance, and Part II has larger radial support power and can provide enough grapplings, and therefore, above-mentioned tube chamber braided support is applicable to actual implantation well.

Hook around knot separately rear because every at least two braided wires from an end of Part II hook mutually around formation one described first, the braided wires braiding that all formations described first hook around knot forms described Part I, namely, Part I, multiple first hooks and is formed by same braided wires braiding around knot and Part II, in various piece, the quantity of braided wires is identical, and can be formed by integrated woven.

Accompanying drawing explanation

Fig. 1 is the structural representation of the tube chamber braided support of this utility model embodiment one.

Fig. 2 be the hook of tube chamber braided support in Fig. 1 around the hook of knot around mode schematic diagram.

Fig. 3 hooks to hook around mode schematic diagram around another knot.

Fig. 4 is the Part I the Knitting Principle schematic diagram of the tube chamber braided support in Fig. 1.

Fig. 5 is the part-structure schematic diagram of the tube chamber braided support of this utility model embodiment two.

Fig. 6 is the tube chamber braided support structural representation of this utility model embodiment three.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain this utility model, and be not used in restriction this utility model.

Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in description of the present utility model herein just in order to describe specific embodiment, is not intended to be restriction this utility model.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.

See Fig. 1, the tube chamber braided support 100 of this utility model embodiment comprises and weaves by braided wires 1 the netted body 10 formed, and this netted body 10 has multiple braided mesh 11.Netted body 10 comprises Part I 110, multiple first vertically and hooks around knot 140 and Part II 120, and each first hook is hooked around being formed by least two described braided wires 1 vertically mutually around knot 140.Described hook refers to the length direction spiral wrap of a braided wires along one or more braided wires other around knot, forms " Flos Cannabis " shape structure.Hooking can be substantially parallel with the axis of netted body 10 around knot, also can be not parallel to the axis of netted body 10.Often adjacent two hooks can be parallel to each other around knot, also can be not parallel.Part I 110 hooks by multiple first and is connected with Part II 120 around knot 140; The mesh density of Part I 110 is less than the mesh density of Part II 120, and the plurality of first length hooked around knot 140 can be equal, also can not wait.All first hooks can be positioned at a plane perpendicular to the axis of netted body 10 around the proximal end of knot 140 and/or the line of distal end.In concrete enforcement, multiple first hook can be uniformly distributed along the circumference of netted body 10 around knot 140, and every root hooks the axis being basically parallel to netted body 10 around knot 140; First hook is at least two around knot 140, should know, and the first hook be applicable to can be selected as required around the quantity of knot 140, such as 3-12, repeat no more herein.

In above-mentioned tube chamber braided support, by first hook around knot 140 connect Part I 110 and Part II 120 because braided wires hook around and become two independently knitted bodies, braided parameter (such as angle of weave and direction) is each other no longer mutually limited, or mutually retrain, can the braided parameter of independent regulation Part I 110 and Part II 120 as required, therefore Part I 110 and Part II 120 can have different braided parameter, and the mesh density accordingly in these two knitted bodies can not be identical.Mesh density herein refers to the number of braided mesh in unit are; If the mesh density of knitted body is less, then this part knitted body has good compliance, and radial support power is less, and vice versa.

Netted body 10 is for having the axial cavity of proximal openings and distal openings, define body fluid (such as blood flow) in this utility model and proximally flow to far-end, after stenter to implant tube chamber, this cavity then can become new body fluid channel, and such as, after implantable intravascular, this cavity then can become new channel of blood flow.Netted body 10 is woven by least one braided wires 1 and forms, such as, can be that a braided wires reciprocal knitting forms, and also can be that the cooperatively interact braiding that crosses of many braided wires forms, no longer clearly distinguish, all can be described as many braided wires in follow-up elaboration; Braided wires 1 can be titanium-nickel wire, can also be other biological material braided wires.

See Fig. 1, if Part I 110 comprises open end, then this part attaches normal wall of the lumen after the implantation, and Part II 120 attaches pathological lumen wall.Part I 110 opposed second part 120 has comparatively sparse mesh density, therefore the radial support power of Part I 110 is relatively little, thus the stimulation that can relatively reduce normal wall of the lumen, weaken the body reaction of body foreign body to external world, reduce the risk of restenosis, the Part II 120 that mesh density is larger simultaneously still can provide enough radial support power, guarantees that support is in intraluminal grappling.Or, if Part I 110 implants tortuous tube chamber position, then because its mesh density is less, there is good compliance, and at level and smooth tube chamber position, Part II 120 can provide larger radial support power and guarantee enough grapplings.

Netted body 10 can adopt axial screw weaving manner to weave and form, interlaced by the mode that a pressure one or pressure is many between the braided wires 1 crossed in braiding, finally forms the tubular braided structure with mesh 11.Certainly, the mode that can also be applicable to arbitrarily by other between the braided wires crossed is interlaced.Weaving manner of the present utility model is also not limited to axial screw weaving manner, also can select the weaving manner of any appropriate as required, such as axial Z-shaped ripple weaving manner etc.Should know, because being that same braided wires back and forth crosses, also can being cross between different braided wires, no longer clearly distinguishing herein, be all called braided wires and crossing staggered or crossing or weaving between braided wires or many braided wires.

Every at least two braided wires from an end of Part II 120 mutually hook and hook around knot 140 separately rear around formation one first, and the braided wires braiding that all formations first hook around knot 140 forms Part I 110.Namely each first hook around knot 140 by mutually hooking around being formed from least two of Part II 120 around the braided wires to different (such as around to contrary), all braided wires of braiding Part II are all used for braiding first and hook around knot 140.Such as, hooking can by means of only two braided wires hooks around formation around knot; Or also mutually hook around forming by the braided wires of more than two, namely hook in knot any braided wires by with hook in tying at least one other braided wires hook around.Hooking the hook of two braided wires in knot has multiple around mode, such as, to hook in knot two braided wires and can hook around once, or two braided wires can hook around repeatedly continuously.

See Fig. 2, two braided wires 1a and 1b cross hook around time, wherein a braided wires (such as braided wires 1b) catches on another root braided wires (such as braided wires 1a), from its side around to opposite side, formed hook around.See Fig. 3, two braided wires 1a and 1b cross hook around time, wherein braided wires (such as braided wires 1b) is repeated multiple times catches on another root braided wires (such as braided wires 1a), formed repeatedly hook continuously around.By regulate hook continuously around number of times regulate the length hooked around knot, such as scalable repeatedly hooks and is about 2 ± 0.5mm around the hook formed around the coiling length of knot.Certainly, be not limited thereto, length can adjust according to the actual requirements.Should know, for loose hook is around only for ease of seeing figure between the braided wires shown in Fig. 2 and 3, those skilled in the art can adopt hook closely around, namely all braided wires twists into one.Especially for the repeatedly hook in Fig. 3 around, repeatedly closely hook around rear, hook around braided wires between substantially relatively fixing, be difficult to relative movement.

Hook the braiding trend walking around two braided wires in journey to change, therefore form first to hook after two braided wires of knot 140 are separated from each other, no longer mutually restrict or mutually retrain, the braided wires of both sides can independently select suitable braided parameter or weaving manner as required, correspondingly, the Part I 110 and the braided parameter of Part II 120 that connect around knot 140 is hooked or weaving manner can independently be selected by first, such as, the angle of weave of Part I 110 and the angle of weave of Part II 120 can be independently set, thus make the braided mesh density of Part I 110 be different from the mesh density of Part II 120.

See Fig. 4, two braided wires of Part II 120 form rear hook of weave mesh 12 with angle of weave α and hook around knot 140 around formation first; Hook around after two braided wires relatively hook around independently of one another front, again can select the weaving manner be applicable to as required, such as, select the angle of weave be applicable to, weave Part I 110.Now, all braided wires of braiding Part II 120 are all used for braiding all first and hook around knot 140, and weave all first and hook and be used for weaving whole Part I 110 around whole braided wires of knot 140.

Such as, mould rod (not shown) can be adopted to carry out the braiding of netted body, this mould rod is provided with many group hanging wire bars, illustrate in Fig. 4 and be close to second group of hanging wire bar 910 or 920 for the formation of hooking around first group of hanging wire bar 800 of knot and second group of hanging wire bar, 910 or 920, the first group of hanging wire bar 800 for weaving Part I 110.Braided wires 1c and 1d respectively by two hanging wire bars in first group of hanging wire bar 800 hook separately around after cross, with angle of weave β weave Part I 110.The size of β is relevant with the hanging wire bar that braided wires is selected in second group of hanging wire bar 910 or 920, for braided wires 1c wherein, if relative distance between the hanging wire bar in second group of hanging wire bar 910 or 920 of the hanging wire bar in first group of hanging wire bar 800 and next-door neighbour is circumferentially less, then angle of weave β is less, and the density of the braided mesh of corresponding formation is less.Or, also by regulate first group of hanging wire bar 800 and next-door neighbour second group of hanging wire bar 910 or 920 between distance to axial to regulate angle of weave, if distance is adjusted to relatively long L1 from L2 to axial between first group of hanging wire bar 800 and second group of hanging wire bar 910 or 920, under the condition identical with hanging wire bar 800 relative distance circumferentially in first group of hanging wire bar, the angle of weave γ adopting hanging wire bar 920 (corresponding L2) to be formed is less than the angle of weave β adopting hanging wire bar 910 (corresponding L1) to be formed, namely distance is larger to axial, angle of weave is less.

As can be seen from the above, in netted body of the present utility model, two braided wires of Part I 110 hook around after become the braided wires of Part II 120; Or, two braided wires of Part II 120 hook around after become the braided wires of Part I 110.That is, Part I 110, multiple first hooks and is formed by same braided wires braiding around knot 140 and Part II 120, and in various piece, the quantity of braided wires is identical, and can be formed by integrated woven.Therefore, although it is different that Part I 110 and Part II 120 weave density degree, but be interconnected again after separately weaving separately between the two, even if two parts knitted body that integrated woven mesh density degree is different, also not needing at braiding intersection is form comparatively sparse braided mesh to remove the adjacent a part of braided wires had in the knitted body of larger braided mesh density, thus the ending end of the braided wires removed can not be formed at the intersection of this two parts knitted body, this ending end is avoided to tilt outstanding after stenter to implant because of vasokinetic or vascular bending, ensure that smooth concordance and the compliance of support entirety.

Two braided wires hook around rear, mutually retrain between braided wires, freedom of movement reduces, especially for shown in Fig. 3 repeatedly hook continuously around, hooking substantially cannot relative movement between two braided wires at place, when tube chamber braided support 100 radial compression enters in sheath pipe, first hook around knot 140 can not along with the radial compression of tube chamber braided support 100 axial elongation, thus the overall percentage elongation of tube chamber braided support 100 can be reduced.Correspondingly, when tube chamber braided support 100 radial development discharges, if Part II 120 first attaches with wall of the lumen, then be difficult to the Part II 120 that axially extended hook will be avoided the release of Part I 110 to affect having attached around knot as far as possible, thus avoid the Part II 120 discharged to be shifted as far as possible, facilitate the location of tube chamber braided support 100, and then reach better therapeutic effect.

It is the part-structure schematic diagram of the tube chamber braided support of embodiment two see Fig. 5, Fig. 5.The tube chamber braided support of embodiment two and the tube chamber braided support of embodiment one unlike:

Part I 110 comprises tapered opening end 111, and the path length of tapered opening end 111 increases from the side near Part II 130 gradually to the side away from described Part II 130.That is, tapered opening end 111 is in bell mouth shape.Particularly, the subtended angle δ of tapered opening end 111 is 45-120 degree, and this subtended angle refers to the taper angle of the equivalent cone of tapered opening end herein.When weaving, the conical die clavate with subtended angle δ can be adopted to become this tapered opening portion 111.

Part I 110 has tapered opening end 111, makes the adjustable scope of angle of weave γ fixing the Part I 110 of the first hook after knot 140 larger, and not by the restriction of the angle of weave of Part II 120.In addition, tapered opening end 111 has the initial trend expanded laterally, and when tube chamber braided support is in radial compression, tapered opening end 111 has larger expansionary force laterally.This bell-mouth structure of air can be close to blood vessel wall when radial expansion state, can increase further the anchoring properties of tube chamber and adherent property, avoid the risk that tube chamber braided support is shifted.

It is the structural representation of the tube chamber braided support of embodiment three see Fig. 6, Fig. 6.The tube chamber braided support of embodiment three and the tube chamber braided support difference of embodiment one are:

Netted body also comprises Part III 130, and Part III 130 is vertically away from Part I 110.Part II 120 and Part III 130 hook by multiple second and are connected around knot 150.The mesh density of Part III 130 is different from the mesh density of Part II 120.In another detailed description of the invention, the mesh density of Part I 110 is identical with the mesh density of Part III 120.

First hook is identical with the generation type that second hooks around knot 150 around the generation type of knot 140, and namely the second hook can be hooked around once being formed by least two braided wires mutually around knot 150, or is mutually hooked continuously around repeatedly being formed by least two braided wires.And every at least two braided wires from close Part III 130 one end of Part II 120 hook around formation one second hook separately rear around knot 150 mutually, all second hooks the braided wires braiding formation Part III 130 around knot 150.Namely in the end side of Part II 120, all braided wires of braiding Part II 120 are all used for formation second and hook around knot 150 and form whole braided wires of the second hook around knot 150 all from Part II 120; The braided wires of all Part III 130 all hooks around knot 150 from second.Thus, Part II 120, multiple second hooks and is formed by same braided wires braiding around knot 150 and Part III 130, and in various piece, the quantity of braided wires is identical, and can be formed by integrated woven; Even, Part I 110, multiple first hooks and hooks formed by same braided wires braiding around knot 150 and Part III 130 around knot 140, Part II 120, multiple second, and in various piece, the quantity of braided wires is identical, and can be formed by integrated woven.

In the present embodiment, Part III 130 mesh density can be less than the mesh density of Part II 120, if Part III 130 comprises open-ended, such as distal openings, then also can reduce the risk of this open-ended restenosis; Certainly, now the open-ended of Part III 130 can, in horn-like, be also tapered end opening.Certainly, Part III 130 mesh density also can be greater than the mesh density of Part II 120, if Part II 120 implants tortuous tube chamber position, then because its mesh density is less, there is good compliance, and at level and smooth tube chamber position, Part III 130 can provide larger radial support power and guarantee enough grapplings.

It is worth mentioning that, tube chamber braided support in other embodiment of the present utility model, multiple above-mentioned Part II can be comprised, the plurality of Part II is placed with various ways on netted body, such as multiple Part II can separate arrangement vertically, is connected between every two adjacent Part II by multiple hook around knot.Similarly, support also can comprise multiple Part III, its arrangement mode can refer to the arrangement mode of multiple Part II, or multiple Part II and multiple Part III alternately separate arrangement vertically, is connected between two often adjacent parts by multiple hook around knot.More than arranging only with for example, is not to restriction of the present utility model, and those skilled in the art can implant according to reality to be needed to select suitable structural grouping, repeats no longer one by one herein.

Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this description is recorded.

The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make multiple distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.

Claims (11)

1. a tube chamber braided support, comprise and weave by braided wires the netted body formed, described netted body comprises Part I and Part II vertically; It is characterized in that, described netted body also comprises multiple first and hooks around knot, every at least two braided wires from an end of Part II are separated along axially mutual hook of netted body around described first hook of formation one after knot, and the braided wires braiding that all formations described first hook around tying forms described Part I; The mesh density of described Part I is less than the mesh density of described Part II.

2. tube chamber braided support according to claim 1, is characterized in that, described multiple first circumference hooked around tying along described netted body is uniformly distributed.

3. tube chamber braided support according to claim 1, it is characterized in that, described netted body comprises multiple Part II, and described multiple Part II is intervally arranged vertically, all hooks by multiple first and link together around knot between every two adjacent described Part II.

4. tube chamber braided support according to claim 1, it is characterized in that, described netted body also comprises multiple second vertically and hooks around knot and Part III, described Part III and described Part I lay respectively at the two ends of described Part II, every at least two braided wires from the other end of Part II mutually hook and hook around knot separately rear around formation one described second, and all described second hooks the described Part III of braided wires braiding formation around knot.

5. tube chamber braided support according to claim 4, is characterized in that, the mesh density of described Part III is different from the mesh density of described Part II.

6. tube chamber braided support according to claim 4, is characterized in that, described multiple second circumference hooked around tying along described netted body is uniformly distributed.

7. tube chamber braided support according to claim 4, is characterized in that, the mesh density of described Part I is identical with the mesh density of described Part III.

8. tube chamber braided support according to claim 4, it is characterized in that, described netted body comprises multiple Part III, and described multiple Part III is intervally arranged vertically, all hooks by multiple second and link together around knot between every two adjacent described Part III.

9. tube chamber braided support according to claim 1, is characterized in that, described Part I comprises tapered opening end, and the path length of described tapered opening end increases from the side near described Part II gradually to the side away from described Part II.

10. tube chamber braided support according to claim 9, is characterized in that, the subtended angle of described tapered opening end is 45-120 degree.

11. tube chamber braided supports according to any one of claim 1-10, is characterized in that,

The described first at least two described braided wires hooked in knot hook around once mutually; Or the described first at least two described braided wires hooked in knot hook around to few twice mutually continuously;

When described netted body comprise multiple second hook around knot time, described second to hook in knot two described braided wires hooks around once; Or described second hooks two described braided wires in knot hooks continuously around to few twice.