CN105682614A

CN105682614A - Stent

Info

Publication number: CN105682614A
Application number: CN201480054374.XA
Authority: CN
Inventors: 羽贺慎郎; 羽贺慎一郎; 坂井正宗
Original assignee: Japan Lifeline Co Ltd
Current assignee: Japan Lifeline Co Ltd
Priority date: 2014-01-28
Filing date: 2014-09-03
Publication date: 2016-06-15
Anticipated expiration: 2034-09-03
Also published as: JP2015139536A; JP6045036B2; KR101799713B1; WO2015114869A1; KR20160091965A; CN105682614B

Abstract

Provided is a stent in which a wire (W) is circumferentially and axially advanced while being bent in a wave shape, and bent portions of the wave shape form engaging portions so as to create a tubular mesh pattern. The stent has a developed mesh pattern in which alternately arranged are: a first mesh connected portion (10C) in which a plurality of substantially parallelogram-shaped first meshes (10) having the engaging portions as vertexes are connected while sharing short sides of the parallelogram; and a second mesh connected portion (20C) in which a plurality of substantially trapezoid-shaped second meshes (20) having the engaging portions as vertexes are connected while sharing legs of adjacent trapezoids on bases thereof, the second meshes (20) sharing long sides of the parallelogram which is the shape of the first mesh (10) as the bases thereof. No more than three of the engaging portions are formed in the same axial direction position. According to this stent, the diameter thereof can be sufficiently reduced without the plurality of engaging portions overlapping each other when inserting into a sheath.

Description

Support

Technical field

The present invention relates to and a kind of prevented the narrow of this pipe and the support blocked etc. in internal pipe by indwelling.

Background technology

The pipe that is known in the organism such as digestive tract, blood vessel is narrow/when blocking, expand/keep the support indwelling art of tube chamber at this position indwelling support.

In the indwelling art of support, the sheath at the support by being inserted with undergauge state imports pipe and so as to after arriving purpose position (affected part), only take out sheath, thus makes stent-expansion indwelling at purpose position.

At this, it is made up of cylindrical body in the support of pipe by indwelling, this cylindrical body becomes waveform edge circumference and axial advancement by making wire rod limit flexing and forms the mutual hook portion of flexing portion mutually hook of waveform and be woven into mesh-shape and form (for example, referring to patent documentation 1).

Patent documentation 1: Japanese Unexamined Patent Publication 2005-160708 publication

(1) in the existing support described in above-mentioned patent documentation 1, the multiple mutual hook portion that the flexing portion of mutual hook waveform is constituted each other is throughout the total length of this support, circumferentially arrange at identical axial location, therefore when making this support undergauge, the multiple mutual hook portion circumferentially arranged interferes (coincidence), the problem that there is the stent diameter that cannot fully reduce this axial location.

(2) additionally, in the existing support described in patent documentation 1, multiple mutual hook portions are on the complete cycle of this support, and axially aligned at identical circumferential position, if being therefore intended to bend this support according to the shape of internal pipe, the multiple mutual hook portion being then positioned at inner side during bending interferes, flexural rigidity increases (being difficult to bend), it addition, easily revert to linearity by recuperability, now, there is the inwall to pipe and cause the worry of damage.

(3) and, in the existing support described in patent documentation 1, shape of a mesh be its diagonal vertically and circumferentially extending rhombus, therefore this support being inserted sheath and so as to during undergauge, the mesh of rhombus closes (in this mesh, the mutual hook portion separated in circumference is against each other), thus the length of support is widely varied. Therefore, after the sheath making to be inserted with the support of undergauge state arrives purpose position, taking out this sheath when making stent-expansion, the length of the support after expansion surprisingly shortens (so-called shortening substantially occurs), thus cannot this support of correctly indwelling.

Summary of the invention

The present invention is based on case above and completes.

The first object of the present invention be in that to provide a kind of can support that fully undergauge and multiple mutual hook portion will not interfere when inserting sheath.

The second object of the present invention is in that to provide a kind of shape that can follow internal pipe and fully flexural deformation and the inwall of pipe will not cause the support of damage.

Even if the third object of the present invention be in that to provide a kind of along with undergauge and the change of expanding length less thus from the undergauge state being inserted into sheath take out sheath and expand, its length is without becoming extremely short support.

(1) support of the present invention is by making wire rod limit flexing become waveform while circumferentially and axial advancement, and forms the mutual hook portion of flexing portion mutually hook of waveform to form the mesh pattern of tubular,

Described support is characterised by,

When launching the mesh pattern of tubular,

In each of axially aligned multiple layers, with above-mentioned mutual hook portion be summit the mesh of quadrilateral shape have above-mentioned summit and circumferentially arrangement be formed with more than 3,

The total above-mentioned mutual hook portion involved by above-mentioned summit is separately configured in the axial location of more than 2, and the above-mentioned mutual hook portion being configured in identical axial location is less than 3.

Support according to said structure, so as to during undergauge, the mutual hook portion being configured in identical axial location is few to less than 3, is therefore absent from them and interferes and the situation that hinders undergauge being inserted into sheath. As a result of which it is, stent diameter can fully be reduced.

(2) in the support of the present invention, it is preferable that when launching the mesh pattern of tubular,

The multiple row circumferentially arranged each in, have above-mentioned summit with the mesh of quadrilateral shape that above-mentioned mutual hook portion is summit and axially aligned be formed with 2N or 2N-1 (wherein, N is integer),

Except the mutual hook portion being configured in opposed 2 circumferential position, total 2N-1 involved by above-mentioned summit or 2N above-mentioned mutual hook portion are separately configured in the circumferential position of more than 2, are not configured with exceeding N number of mutual hook portion at identical circumferential position.

Support according to such structure, except the mutual hook portion being configured in opposed 2 circumferential position, the identical 2N-1 in row or 2N mutual hook portion is not configured in identical circumferential position entirely, and be configured with the state staggered in the circumferential each other, be configured in the mutual hook portion of identical circumferential position be N number of below, therefore, it is possible to fully reduce the flexural rigidity of support. Thereby, it is possible to follow the shape of internal pipe and fully flexural deformation, it addition, the part of bending recovers linearity causes damage without to the inwall of pipe.

(3) in the support of the present invention, it is preferable that when launching the mesh pattern of tubular, be alternately arranged:

First mesh linking part, its be with above-mentioned mutual hook portion be summit the mesh of approximate parallelogram (than diamond) shape and two diagonal of above-mentioned parallelogram have the minor face of above-mentioned parallelogram and a side on long limit both with respect to axially not parallel also off plumb first mesh of support and be linked with multiple and constituted; And

Second mesh linking part, its be have with the shape of above-mentioned first mesh and the minor face of above-mentioned parallelogram and the opposing party on long limit for its base and with above-mentioned mutual hook portion be summit the total above-mentioned trapezoidal waist adjacent with above-mentioned base of the second mesh of approximate trapezoid and be linked with multiple and constituted.

Support according to such structure, two diagonal of shape (approximate shapes) the i.e. parallelogram of the first mesh are both with respect to the axially not parallel also out of plumb of support, and therefore 4 summits (mutual hook portion) of this parallelogram axial location each other and circumferential position are different. Thereby, it is possible to make 2 mutual hook portions adjacent in circumference stagger in the axial direction, and it also is able to make 2 axially adjacent mutual hook portions stagger in the circumferential.

And, the approximate shapes of the first mesh and the 4 of parallelogram summits (mutual hook portion) axial location each other and circumferential position are different, thus link the first mesh and the multiple mutual hook portion (they are also the mutual hook portions involved by the second mesh linking part) involved by the first mesh linking part that constitutes axial location each other and circumferential position are different.

In addition, by making the first mesh linking part and the second mesh linking part be alternately arranged (clamping the second mesh linking part), it is possible to be that axial location each other and circumferential position are different by 4 apex configuration of the shape of the first mesh and parallelogram.

Additionally, when making support undergauge, even if parallelogram (than diamond) shape, trapezoidal mesh close, its summit (mutual hook portion) each other without abutting, the situation that the undergauge of support being therefore also absent from being formed by the mesh of above-mentioned shape is hindered because of the overlap (interference) of mutual hook portion.

Further, when making support undergauge, it is impossible to make total limit and the first mesh and the second mesh two side that are concatenated are of completely closed as the mesh of the rhombus being concatenated equally, suppress less therefore, it is possible to will change along with undergauge and expanding length.

(4) in the support of above-mentioned (3), preferably above-mentioned first mesh linking part is substantially formed helical form throughout half cycle towards axial end side, the 3rd mesh across the approximate kite shape being summit with above-mentioned mutual hook portion, and then substantially it is formed helical form throughout half cycle towards another axial side

Above-mentioned second mesh linking part is substantially formed helical form throughout half cycle towards axial end side, across the 4th mesh of the approximate kite shape being summit with above-mentioned mutual hook portion, and then substantially it is formed helical form throughout half cycle towards another axial side.

Support according to such structure, is absent from the situation that the rigidity etc. of support changes because of axial location and circumferential position difference.

Support according to above-mentioned (1), when being inserted into sheath, multiple mutual hook portions will not interfere (intensively overlapping), therefore, it is possible to abundant undergauge.

Support according to above-mentioned (2), additionally it is possible to follow the shape of internal pipe and fully flexural deformation, and, cause damage without to the inwall of pipe.

Support according to above-mentioned (3) and (4), additionally it is possible to making to change less along with undergauge and expanding length, even if thus taking out sheath from the undergauge state inserting sheath and expanding, its length is without becoming extremely short. Therefore, it is possible to make support be correctly retained in into for the purpose of position.

Accompanying drawing explanation

Fig. 1 is the front view of the support involved by one embodiment of the present invention.

Fig. 2 is the side view of the support involved by one embodiment of the present invention.

Fig. 3 is the rearview of the support involved by one embodiment of the present invention.

Fig. 4 A is the expanded view of the support shown in Fig. 1.

Fig. 4 B is the expanded view of the support shown in Fig. 1.

Fig. 5 is the explanation figure of state schematically showing the mesh elongation of diamond shaped and closing.

Fig. 6 is the explanation figure of state schematically showing the mesh elongation of parallelogram like and closing.

Detailed description of the invention

The support 100 of the present embodiment of the shape shown in Fig. 1～Fig. 3 and Fig. 4 (Fig. 4 A and Fig. 4 B) is such as indwelling in gastral supports such as intestinal, and it becomes waveform edge circumference and axial advancement by making single line material W limit flexing and form the mutual hook portion of flexing portion mutually hook (forming in the way of mutually hook) of waveform and form the mesh pattern of tubular.

Additionally, the mesh pattern of the expansion shown in Fig. 4 (Fig. 4 A and Fig. 4 B) is to launch not apply the support 100 under the state (expansion state) of the power in undergauge direction.

Support 100 is formed as tubular by weaving single line material W.

As the wires W constituting support 100, it is possible to use the wire rod of known composition support, it is preferable that the wire rod being made up of metal material, it is possible to be suitably used marmem etc. As metal material, it is possible to exemplify rustless steel, tantalum, titanium, platinum, gold, tungsten etc. It addition, as the concrete example of marmem, it is possible to enumerate the alloys such as Ni-Ti system, Cu-Al-Ni system, Cu-Zn-Al system.

As the diameter of wires W, according to purposes of support 100 etc. and different, without particular limitation of, but be such as 0.05～1.0mm, it is preferred to 0.15～0.30mm.

As external diameter and the length of support 100, being all when expansion, for instance preferably external diameter is 5～40mm, length is 30～200mm, it is shown that a preferred example, external diameter is 22mm, length is 120mm.

As shown in Figure 4, the mesh pattern of the support 100 of present embodiment is made up of the first mesh 10 of approximate parallelogram shape, the second mesh 20 of approximate trapezoid, approximate 3rd mesh 30 of kite shape and the 4th mesh 40 of approximate kite shape.

At this, " mesh " in first mesh the 10, second mesh the 20, the 3rd mesh 30 and the 4th mesh 40 refers to and not only includes the space impaled by the wires W woven, the concept (structure) also including surrounding the wires W in this space.

Additionally, first mesh the 10, second mesh 20, the 3rd mesh 30 and the approximate shapes of the 4th mesh 40 and the summit of tetragon be except by cannot with the mechanism that the flexing portion of the end side of other mutual hooks in flexing portion or another side is formed except make flexing portion mutually hook constitute, that is, it is made up of the mutual hook portion formed in the way of mutual hook.

Additionally, as shown in Figure 4, in the end (end side and another side respective) of the mesh pattern of the support 100 of present embodiment, not with the axially spaced configuration of 5 flexing portions (protuberance) of other mutual hooks in flexing portion, the flexing portion being configured in identical axial location is less than 2. Thus, when making the end diameter reducing of support 100 of present embodiment to insert internal pipe, it is absent from flexing portion and interferes each other and hinder situation as the undergauge of end, therefore also be able to insert swimmingly relative to thinner pipe.

In the mesh pattern shown in Fig. 4 (Fig. 4 A), the mesh having the summit being made up of mutual hook portion 5 quadrilateral shape circumferentially arranged constitute one " layer ".

At this, in the ground floor of mesh pattern, the 3rd mesh the 30, second mesh the 20, first mesh the 10, first mesh 10 and the second mesh 20 have the summit (mutual hook portion) of respective approximate shapes and tetragon and circumferentially arrange.

In the second layer, second mesh the 20, first mesh the 10, the 4th mesh the 40, first mesh 10 and the second mesh 20 have the summit (mutual hook portion) of respective approximate shapes and tetragon and circumferentially arrange.

In third layer, the 4th mesh the 40, first mesh the 10, second mesh the 20, second mesh 20 and the first mesh 10 have the summit (mutual hook portion) of respective approximate shapes and tetragon and circumferentially arrange.

In the 4th layer, arrange according to first mesh the 10, second mesh the 20, the 3rd mesh the 30, second mesh 20 and the first mesh 10.

In addition, the layer 5 of mesh pattern, the 9th layer, the tenth three layers and the 17th layer identical with ground floor, layer 6, the tenth layer, the 14th layer and the 18th layer identical with the second layer, layer 7, eleventh floor, the 15th layer and the 19th layer identical with third layer, the 8th layer, Floor 12 and the 16th layer identical with the 4th layer.

Therefore, it is possible to form the support 100 of present embodiment by repeating the pattern of ground floor～four layer.

It addition, in the mesh pattern shown in Fig. 4 (Fig. 4 A), the mesh having summit axially aligned 10 or 9 quadrilateral shape being made up of mutual hook portion constitute one " row ".

At this, in the first row of mesh pattern, 10 meshes (the 3rd mesh the 30, the 4th mesh the 40, the 3rd mesh the 30, the 4th mesh the 40, the 3rd mesh the 30, the 4th mesh the 40, the 3rd mesh the 30, the 4th mesh the 40, the 3rd mesh 30 and the 4th mesh 40) have the summit (mutual hook portion) (total mutual hook portion is 9) of respective approximate shapes and tetragon and axially aligned.

In each row of secondary series and the tenth row, 9 meshes (second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh 10 and the second mesh 20) have the summit (mutual hook portion) (total mutual hook portion is 10) of respective approximate shapes and tetragon and axially aligned.

In each row of the 3rd row and the 9th row, 10 meshes (second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh 20 and the first mesh 10) have the summit (mutual hook portion) (total mutual hook portion is 9) of respective approximate shapes and tetragon and axially aligned.

In each row of the 4th row and the 8th row, 9 meshes (first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh 20 and the first mesh 10) have the summit (mutual hook portion) (total mutual hook portion is 10) of respective approximate shapes and tetragon and axially aligned.

In each row of the 5th row and the 7th row, the mesh (first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh the 10, second mesh the 20, first mesh 10 and the second mesh 20) of 10 has the summit (mutual hook portion) (total mutual hook portion is 9) of respective approximate shapes and tetragon and axially aligned.

In arranging the 6th, the mesh (the 4th mesh the 40, the 3rd mesh the 30, the 4th mesh the 40, the 3rd mesh the 30, the 4th mesh the 40, the 3rd mesh the 30, the 4th mesh the 40, the 3rd mesh 30 and the 4th mesh 40) of 9 has the summit (mutual hook portion) (total mutual hook portion is 10) of respective approximate shapes and tetragon and axially aligned.

And, in the mesh pattern of the expansion shown in Fig. 4 (Fig. 4 A and Fig. 4 B), it is alternately arranged: the first mesh linking part 10C, it is that the first mesh 10 of approximate parallelogram shape has the minor face of its parallelogram and is linked with 4 (wherein, be 3 in another axial side) and constitutes; And the second mesh linking part 20C, it is the total trapezoidal waist adjacent with this base of the second mesh 20 of the total approximate trapezoid for its base with the approximate shapes of the first mesh 10 and the long limit of parallelogram and is linked with 4 (wherein, be 2 in axial end side) and constitutes.

First mesh linking part 10C is substantially formed as helical form throughout half cycle towards axial end side (upside of accompanying drawing), across the 3rd mesh 30 of the approximate kite shape being summit with mutual hook portion, and then be substantially formed as helical form throughout half cycle towards axial another side (downside of accompanying drawing).

Additionally, second mesh linking part 20C is substantially formed as helical form throughout half cycle towards axial end side (upside of accompanying drawing), across the 4th mesh 40 of the approximate kite shape being summit with mutual hook portion, and then be substantially formed as helical form throughout half cycle towards axial another side (downside of accompanying drawing).

At this, " Kite " is the figure (tetragon) that the group that the length on adjacent both sides is equal has two groups, and its diagonal is orthogonal.

First mesh 10 constituting mesh pattern of support 100 is formed as approximate parallelogram shape as expansion shape. Wherein, the first mesh 10 is approximate parallelogram, but is not rhombus, there is minor face and long limit.

As it is shown in figure 5, when the mesh 5 of diamond shaped extends and closes, opposed 2 summits 51,52 abut. Therefore, if the first mesh 10 is formed as diamond shaped, then by its axially elongated time, the mutual hook portion that circumferentially arranges abuts, and sometimes interferes with the undergauge of support.

On the other hand, as shown in Figure 6, when the mesh 6 in parallelogram like extends and closes, opposed 2 summits 61,62 will not abut. Therefore, if the first mesh 10 is formed as parallelogram like, even if then extending this first mesh 10, mutual hook portion is each other without abutting, therefore, is absent from the overlap because of mutual hook portion (interference) and hinders the situation of the undergauge of support 100.

Ratio as the approximate shapes of the first mesh 10 and the length on the minor face of parallelogram and long limit, it is preferred to 1:1.2～1:5.

As shown in Figure 4, the approximate shapes of the first mesh 10 and two diagonal of parallelogram are both with respect to the axially not parallel also out of plumb of support 100.

Therefore, 4 summits (mutual hook portion) of this parallelogram axial location each other and circumferential position are different.

Thereby, it is possible to make 2 mutual hook portions adjacent in circumference stagger in the axial direction, and it also is able to make 2 axially adjacent mutual hook portions stagger in the circumferential.

In the approximate shapes and parallelogram of the first mesh 10, the axial angulation (θ of the direction extended as long limit and support₁₁), it is generally 10 °～80 °, it is preferred to 30 °～60 °.

It addition, the axial angulation (θ of the direction extended as the minor face of this parallelogram and support₁₂), it is generally 10 °～80 °, it is preferred to 40 °～70 °.

It addition, the flexion angle (θ of wires W when forming the first mesh 10₁=θ₁₁+θ₁₂) it is generally 20 °～160 °, it is preferred to 70 °～130 °.

To this flexion angle (θ₁) narrow support, multiple mutual hook portions are easily axially aligned, it is difficult to multiple mutual hook portions are configured at different circumferential positions each other. It addition, the rate of change of stent diameter is too small, when this support is inserted sheath, it is impossible to make the abundant undergauge of this support, or the support of undergauge state cannot be made fully to expand. On the other hand, to this flexion angle (θ₁) wide support, multiple mutual hook portions easily circumferentially arrange, it is difficult to multiple mutual hook portions are configured at different axial locations each other. It addition, stent length rate of change is excessive, exists and cause the worry being significantly shorter.

The mesh pattern of the expansion shown in Fig. 4 is formed 38 the first meshes 10,4 (wherein, the axial other end is 3) the first mesh 10 has the minor face of its approximate shapes and parallelogram and link constitutes a first mesh linking part 10C, is thus formed 10 the first mesh linking part 10C by 38 the first meshes 10.

And, the approximate shapes of the first mesh 10 and 4 summits (mutual hook portion) of parallelogram axial location each other and circumferential position are different, therefore multiple mutual hook portion involved by respective first mesh linking part 10C, namely link 10 mutual hook portions involved by the first mesh linking part 10C of 4 the first meshes 10 and link 7 mutual hook portions involved by the first mesh linking part 10C of 3 the first meshes 10 axial location each other and circumferential position is different.

The second mesh 20 constituting mesh pattern is formed as trapezoidal as expansion shape.

The approximate shapes of the second mesh 20 and trapezoidal have the approximate shapes of the first mesh 10 and the long limit of parallelogram as its base.

Thus, the approximate shapes of the second mesh 20 i.e. this trapezoidal summit (mutual hook portion) is consistent with the summit of the approximate shapes of the first mesh 10 and parallelogram (mutual hook portion).

Additionally, the approximate shapes of the second mesh 20 and trapezoidal be not all identical shape, it addition, one part can also be parallelogram.

The second mesh 20 approximate shapes and trapezoidal in, the axial angulation (θ of direction and support that its base extends₂₁) and the axial angulation (θ of direction and support that extends of the long limit of parallelogram₁₁) consistent.

It addition, the axial angulation (θ of the direction extended as this trapezoidal waist (uneven opposite side) and support₂₂), it is generally 20 °～60 °, it is preferred to 30 °～50 °.

It addition, the flexion angle (θ of wires W when forming the second mesh 20₂=θ₂₁+θ₂₂) it is generally 30 °～140 °, it is preferred to 60 °～110 °.

To this flexion angle (θ₂) narrow support, multiple mutual hook portions are easily axially aligned, it is difficult to multiple mutual hook portions are configured at different circumferential positions each other. It addition, the rate of change of stent diameter is too small, when this support is inserted sheath, it is impossible to make the abundant undergauge of this support, or the support of undergauge state cannot be made fully to expand. On the other hand, to this flexion angle (θ₂) wide support, multiple mutual hook portions easily circumferentially arrange, it is difficult to multiple mutual hook portions are configured at different axial locations each other. Additionally, there are the worry that stent length rate of change is excessive.

The mesh pattern of the expansion shown in Fig. 4 is formed 38 the second meshes 20,4 (wherein, axial one end is 2) the second mesh 20 have its approximate shapes and trapezoidal waist and link constitutes a second mesh linking part 20C, thus formed 10 the second mesh linking part 20C by 38 the second meshes 20.

And, multiple mutual hook portion involved by respective second mesh linking part 20C, namely link 10 mutual hook portions involved by the second mesh linking part 20C of 4 the second meshes 20 and link 5 mutual hook portions involved by the second mesh linking part 20C of 2 the second meshes 20 axial location each other and circumferential position is different.

As shown in Fig. 1～Fig. 3 and Fig. 4 (Fig. 4 A and Fig. 4 B), 5 the first mesh linking part 10C are respectively facing axial end side (upside of accompanying drawing) and are substantially formed as helical form throughout half cycle, across the 3rd mesh 30 of kite shape, and then 5 the first mesh linking part 10C are respectively facing axial another side (downside of accompanying drawing) and are substantially formed as helical form throughout half cycle.

Additionally, 5 the second mesh linking part 20C are respectively facing axial end side (upside of accompanying drawing) and are substantially formed as helical form throughout half cycle, across the 4th mesh 40 of approximate kite shape, and then 5 the second mesh linking part 20C are respectively facing axial another side (downside of accompanying drawing) and are substantially formed as helical form throughout half cycle.

According to such support 100, it is absent from causing because of axial location or circumferential position the situation of the first mesh 10 or the second mesh 20 skewness, is therefore absent from rigidity etc. vertically and the situation of circumference change.

3rd mesh 30 of the mesh pattern of composition support 100 and the 4th mesh 40 are all the meshes of the approximate kite shape being summit with mutual hook portion under expansion shape.

Axial and circumferentially extending along support 100 of 3rd mesh 30 and the approximate shapes of the 4th mesh 40 and the diagonal of Kite.

In the both sides of the 3rd mesh 30, the first mesh linking part 10C (the first mesh 10) has both sides (both sides of another axial side) adjacent in the approximate shapes of the 3rd mesh 30 and Kite and the approximate shapes of the first mesh 10 and the minor face of parallelogram and is concatenated.

So, the link direction of the first mesh linking part 10C can be changed into another side from axial end side by clamping the 3rd mesh 30.

Additionally, in the both sides of the 3rd mesh 30, the second mesh 20 has summit (mutual hook portion) each other and is concatenated.

It addition, in the both sides of the 3rd mesh 30, the second mesh 20 has the approximate shapes of both sides (both sides of axial end side) adjacent in the approximate shapes of the 3rd mesh 30 and Kite and the second mesh 20 and trapezoidal base and is concatenated.

In the both sides of the 4th mesh 40, the second mesh linking part 20C (the second mesh 20) has the approximate shapes of both sides (both sides of another axial side) adjacent in the approximate shapes of the 4th mesh 40 and Kite and the second mesh 20 and trapezoidal waist and is concatenated.

So, the link direction of the second mesh linking part 20C can be changed into another side from axial end side by clamping the 4th mesh 40.

Additionally, in the both sides of the 4th mesh 40, the first mesh 10 has summit (mutual hook portion) each other and is concatenated.

It addition, in the both sides of the 4th mesh 40, the first mesh 10 has both sides (both sides of axial end side) adjacent in the approximate shapes of the 4th mesh 40 and Kite and the approximate shapes of the first mesh 10 and the long limit of parallelogram and is concatenated.

3rd mesh 30 and the 4th mesh 40 are in 2 opposed circumferential zones 50, and total respective summit (mutual hook portion) is also alternately arranged vertically.

Owing to being formed with the 3rd mesh 30 and the 4th mesh 40, so at support 100, being inevitably configured with 2 mutual hook portions (approximate shapes of the 3rd mesh 30 or the 4th mesh 40 and the summit of Kite) at identical axial location.

It addition, be inevitably configured with 9 or 10 mutual hook portions (approximate shapes of the 3rd mesh 30 and the 4th mesh 40 and the summit of Kite) at 2 opposed circumferential positions.

Support 100 for the present embodiment formed by above-mentioned mesh pattern, axially aligned multiple layers (ground floor～19th layer) each in, with the total summit of mesh of quadrilateral shape that mutual hook portion is summit and circumferentially arrange and be formed with 5, involved by summit 5 total mutual hook portions are separately configured in the axial location of more than 2, and the mutual hook portion being configured in identical axial location is less than 3.

So, in the support 100 of present embodiment, it is formed on identical axial location no more than 3 mutual hook portions, thus this support 100 being inserted sheath and so as to during undergauge, the mutual hook portion being absent from being formed on identical axial location interferes the situation of (coincidence), is absent from therefore and hinders the situation of undergauge. As a result of which it is, the external diameter of support 100 can fully be reduced, for instance be inserted into the sheath of below 8Fr.

Additionally, support 100 for present embodiment, in each of the multiple row (first row～tenth row) circumferentially arranged, with the total summit of mesh of quadrilateral shape that mutual hook portion is summit and axially aligned be formed with 10 (2N) or 9 (2N-1), except the mutual hook portion being configured in opposed 2 circumferential position, involved by summit 9 total (2N-1) or 10 (2N) hook portions mutually are separately configured in 2 circumferential positions, the mutual hook portion being configured in identical circumferential position is 4 or 5, it is not configured with more than 5 (N number of) hook portion mutually.

So, in the support 100 of present embodiment, except the mutual hook portion being configured in opposed 2 circumferential position, the total mutual hook portion involved by summit is separately configured in 2 circumferential positions, therefore, it is possible to fully reduce its flexural rigidity. Thereby, it is possible to follow the shape of internal pipe and fully flexural deformation, it addition, the part of bending recovers linearity causes damage without to the inwall of pipe.

It addition, 20 liang of sides of the second mesh of the first mesh 10 of approximate parallelogram shape and approximate trapezoid cannot be made of completely closed as the mesh of rhombus, suppress less therefore, it is possible to will change along with undergauge and expanding length.

Specifically, by insert the sheath of 10Fr and taken out this sheath by the support 100 of the length 80mm of undergauge and so as to when being expanded to about 22mm, it is possible to its length is maintained 60mm (75%) left and right. As a result of which it is, above-mentioned support 100 can be made correctly to be retained in the position as purpose.

Above, the embodiment of the support of the present invention is illustrated, but the present invention is not limited to this, it is possible to carry out various change.

Such as, the quantity that constitutes first mesh 10 of the first mesh linking part 10C, the second mesh 20 constituting the second mesh linking part 20C quantity be not limited to 4, for instance suitably can adjust in the scope of 2～10.

It addition, the quantity of the first mesh linking part 10C and the second mesh linking part 20C is also not limited to 10, for instance suitably can adjust in the scope of 6～20.

Alternatively, it is also possible to have at least one of grafting of inner circumferential and/or the periphery covering support.

Description of reference numerals:

100 ... support; 10 ... the first mesh; 10C ... the first mesh linking part; 20 ... the second mesh; 20C ... the second mesh linking part; 30 ... the 3rd mesh; 40 ... the 4th mesh; 50 ... circumferential zones; W ... wire rod.

Claims

1. a support, by making wire rod limit flexing become waveform circumferentially and axial advancement, and forms the mutual hook portion of flexing portion mutually hook of waveform to form the mesh pattern of tubular,

Described support is characterised by,

When launching the mesh pattern of tubular,

In each layer of axially aligned multiple layers, with described mutual hook portion be summit the mesh of quadrilateral shape have described summit and circumferentially arrangement be formed with more than 3,

The total described mutual hook portion involved by described summit is separately configured in the axial location of more than 2, and the described mutual hook portion being configured in identical axial location is less than 3.

2. support according to claim 1, it is characterised in that

When launching the mesh pattern of tubular,

In each row of the multiple row circumferentially arranged, have described summit with the mesh of quadrilateral shape that described mutual hook portion is summit and axially aligned be formed with 2N or 2N-1 (wherein, N is integer),

Except the mutual hook portion being configured in opposed 2 circumferential position, total 2N-1 involved by described summit or 2N described mutual hook portion are separately configured in the circumferential position of more than 2, are not configured with exceeding N number of mutual hook portion at identical circumferential position.

3. support according to claim 1 and 2, it is characterised in that

When launching the mesh pattern of tubular, it is alternately arranged:

First mesh linking part, its be with described mutual hook portion be summit the mesh of approximate parallelogram (than diamond) shape and two diagonal of described parallelogram have the minor face of described parallelogram and a side on long limit both with respect to axially not parallel also off plumb first mesh of support and be linked with multiple and constituted; And

Second mesh linking part, its be have with the shape of described first mesh and the minor face of described parallelogram and the opposing party on long limit for its base and with described mutual hook portion be summit the total described trapezoidal waist adjacent with described base of the second mesh of approximate trapezoid and be linked with multiple and constituted.

4. support according to claim 3, it is characterised in that

Described first mesh linking part is substantially formed helical form throughout half cycle towards axial end side, the 3rd mesh across the approximate kite shape being summit with described mutual hook portion, and then substantially it is formed helical form throughout half cycle towards another axial side

Described second mesh linking part is substantially formed helical form throughout half cycle towards axial end side, across the 4th mesh of the approximate kite shape being summit with described mutual hook portion, and then substantially it is formed helical form throughout half cycle towards another axial side.