CN206491831U - Stent pushing system and corresponding blood flow guider - Google Patents
Stent pushing system and corresponding blood flow guider Download PDFInfo
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- CN206491831U CN206491831U CN201621202835.6U CN201621202835U CN206491831U CN 206491831 U CN206491831 U CN 206491831U CN 201621202835 U CN201621202835 U CN 201621202835U CN 206491831 U CN206491831 U CN 206491831U
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Abstract
A kind of stent pushing system that the utility model is provided includes：Develop head end, and it is located at the distal end of the stent pushing system；String-of-pearls-like part, it includes at least one expansion segment；Funnel component, it includes the funnel structure and the closed end positioned at near-end positioned at distal end, and along the direction for proximally arriving distal end, the cross section of the funnel structure is gradually transitioned into maximum gauge from minimum diameter；Seal wire is pushed, it is located at the near-end of the stent pushing system；Wherein, the distal end of the string-of-pearls-like part is fixed on the development head end, and the near-end of the string-of-pearls-like part is fixed on the push seal wire；Wherein, the funnel component is socketed with the string-of-pearls-like part and the push seal wire, and is fixed on by the closed end on the push seal wire.The utility model additionally provides a kind of blood flow guider.
Description
Technical field
Put it briefly, the utility model is related to PCI field, in particular to a kind of stent pushing system with
And corresponding blood flow guider.
Background technology
Vascular aneurysms (aneurysm) are due to lesion or the damage of arterial wall, form arterial wall limitation or diffusivity
Expansion or the performance of bulging, using dilatancy, pulsation lump as main performance.Aneurysm can occur in any of arterial system
Position, including abdominal aneurvsm, cerebral aneurysm, peripheral aneurysm, Visceral artery knurl etc..Aneurysmal wall is thin and fragility, because
This is easy to rupture.
In addition to traditional internal medicine conservative treatment, operative treatment, interventional therapy is that to treat aneurysmal one kind at present important
Means.In interventional therapy, a kind of conventional method is to be implanted into the embolism materials such as disengageable sacculus, turn by conduit
To inside aneurysmal knurl body, so that the VPV in knurl body substantially slows down or stagnated, gradually form thrombus to block knurl
Body, so that reaching prevents the purpose of aneurysm rupture.
However, above-mentioned insertion type Embolization therapy is (maximum straight in treatment large-scale (maximum gauge is more than 10mm) or epimegetic
Footpath is more than 25mm) aneurysm when at least there is following open defect.First, it is required using embolism materials such as turns to artery
Knurl carries out fine and close filling, however, large-scale or epimegetic aneurysm is often wide neck aneurysm, the turn of filling is very easy to dash forward
Enter in aneurysm parent artery, cause parent artery narrow or even occlusion.By taking cerebral aneurysm as an example, this will cause cerebral ischemia very
To serious consequences such as cerebral infarctions.Second, generally there is occupation time process in large-scale or epimegetic aneurysm, the knurl body of increase is to around weighing
Want internal organs and tissue to cause compressing, influence their physiological function, although turn filling aneurysm can block aneurysm,
It is that can not solve the occupation time process of knurl body, or even occupation time process can be made more serious.
The blood flow guider that the one kind occurred in recent years is based on close net intravascular stent (or abbreviation support) effectively overcomes
Clog drawbacks described above of the turn therapy in the application of large-scale or epimegetic aneurysm is treated.It is implanted after parent artery, a side
Face, this blood flow guider can enter the blood flow of knurl body by fine and closely woven mesh interference from parent artery, make blood in knurl body
Liquid deposits, and forms thrombus, promotes aneurysm to entirely shut；On the other hand it is available for vascular endothelial cell to climb again, blood flow is oriented to dress
Put after being covered by endothelial cell, permanent biological closing will be formed in aneurysm neck, parent artery is reverted to normal blood vessels.
However, the above-mentioned blood flow guider based on close net support still comes with some shortcomings at present.It is public with U.S.'s Medtronic
The Pipeline of departmentTMExemplified by embolization device, because support is arranged to rotate around the core assembly of blood flow guider,
And roundabout, the curved blood vessel passed through during support is transported into therapentic part may result in support and core assembly
Produce distorting stress between (for example, delivery guidewire), reach therapentic part after, the close net support in compressive state due to by
It can not be discharged automatically to the influence of distorting stress.Now, due to the immeasurability of the distorting stress, even if being conveyed by rotating
Seal wire carrys out manual releasing, still there is a possibility that release failure.
In addition, in the case where blood vessel diameter is tiny, radiography definition is limited, and then influence the essence at support placement position
Degree.For Pipeline embolization devices, when the close net backing positions for finding to have discharged are unreasonable, support is recovered to and led
In pipe and to readjust the placement position of support be very difficult.
The above-mentioned support of generation can not discharge, place after the problems such as position is unreasonable, it may be necessary to by whole Pipeline bolts
Plug device takes out, and on the one hand causes scrapping for expensive medical equipment, on the other hand during taking-up, due to having discharged close net branch
Frame it is big by diameter, it is also possible to patient cause damage.
Utility model content
The technical problems to be solved in the utility model is to provide the supplying system of intravascular stent a kind of and corresponding
Blood flow guider.Above-mentioned blood flow guider can be used for aneurysm (particularly large-scale or huge molded breadth neck cerebral aneurysm)
Treatment, and with intravascular stent be easy to release, recuperable characteristic.
In order to solve the above-mentioned technical problem, the utility model provides a kind of stent pushing system, including：Develop head end,
It is located at the distal end of the stent pushing system；String-of-pearls-like part, it includes at least one expansion segment；Funnel component, it includes
Funnel structure positioned at distal end and the closed end positioned at near-end, and along the direction for proximally arriving distal end, the funnel structure
Cross section be gradually transitioned into maximum gauge from minimum diameter；Seal wire is pushed, it is located at the near-end of the stent pushing system；Its
In, the distal end of the string-of-pearls-like part is fixed on the development head end, and the near-end of the string-of-pearls-like part is fixed on institute
State on push seal wire；Wherein, the funnel component is socketed with the string-of-pearls-like part and the push seal wire, and by described
Closed end is fixed on the push seal wire.
Preferably, the string-of-pearls-like part is included in the multiple expansion segments being arranged alternately on axial direction and multiple on-expansibles section.
Or, it is preferable that the string-of-pearls-like part includes multiple expansion segments continuously arranged in the axial direction and two are located at the non-of two ends
Expansion segment.Or, it is preferable that the expansion segment includes coil, and the coil includes at least two parts with different-diameter.
Preferably, the most external for pushing wire distal is socketed with proximal coil, and the proximal coil is fixed on institute
State on push seal wire.It is further preferred that the most external for pushing wire distal is also socketed with developing mark band, the development
Mark band is located at the distal end of the proximal coil, and is fixed on the proximal coil.
Preferably, the near-end for pushing seal wire is also socketed with heat-shrink tube.
Preferably, the expansion segment includes at least one of following：Bicone structure, spherical structure, oblate spheroid structure,
Long spherical structure.
Preferably, the string-of-pearls-like part and the funnel component are by elastic material, shape-memory material or piezoresistive material
Material is made.
Preferably, the string-of-pearls-like part and the funnel component are made up of filament material weaving.
Preferably, the string-of-pearls-like part is made of the braiding of 6 to 64 filament materials, the funnel component using 4 to
24 filament material braidings are made.It is further preferred that the count of the string-of-pearls-like part between 20PPI to 250PPI it
Between.
Preferably, the development head end, the string-of-pearls-like part, the funnel component, the push seal wire, the development
Fixed between mark band, the proximal coil with bonding mode.It is further preferred that the development head end and the string-of-pearls-like portion
Ultraviolet light (UV) solidification glue is used to be fixed with bonding mode between part.Or, it is further preferred that the string-of-pearls-like part, institute
State used between funnel component, the push seal wire, the developing mark band, the proximal coil epoxy resin thermosetting glue with
Bonding mode is fixed.
Preferably, the development head end is provided with covering, and whole open ends of the string-of-pearls-like distal end are wrapped
It is enclosed within the covering.
The utility model additionally provides a kind of blood flow guider, including intravascular stent, stent pushing system, guide wire,
Wherein, in an initial condition, the intravascular stent, the stent pushing system are constrained among the tube chamber of the guide wire.
Wherein, the stent pushing system includes：Develop head end, and it is located at the distal end of the stent pushing system；String-of-pearls-like part, its
Including at least one expansion segment；Funnel component, it includes the funnel structure and the closed end positioned at near-end positioned at distal end, and edge
The direction proximally to distal end, the cross section of the funnel structure is gradually transitioned into maximum gauge from minimum diameter；Push is led
Silk, it is located at the near-end of the stent pushing system.Wherein, the distal end of the string-of-pearls-like part is fixed on the development head end
On, the near-end of the string-of-pearls-like part is fixed on the push seal wire；And wherein, the funnel component and the bead string
Shape part and push seal wire socket, and be fixed on by the closed end on the push seal wire；Wherein, described
Under original state, the intravascular stent be located at the string-of-pearls-like part outside, and the funnel component funnel structure extremely
The part that the intravascular stent is located at near-end is covered less.
Preferably, the number and maximum gauge of the expansion segment are true according to the length and diameter of the intravascular stent respectively
Fixed.
Preferably, compared with complete release conditions, each expansion segment length under the original state is shorter
And maximum gauge is smaller.
Preferably, under complete release conditions, the maximum gauge of the funnel structure of the funnel component is more than the blood vessel
The near-end maximum gauge of support.
Preferably, the most external for pushing wire distal is socketed with proximal coil, and the proximal coil is fixed on institute
State on push seal wire.It is further preferred that the most external for pushing wire distal is also socketed with developing mark band, the development
Mark band is located at the distal end of the proximal coil, and is fixed on the proximal coil.
Preferably, the near-end for pushing seal wire is also socketed with heat-shrink tube.
The utility model provide said apparatus can be used for aneurysmal treatment, with intravascular stent be easy to discharge,
Recuperable characteristic, while interventional therapy operation risk is reduced, can also reduce the scrappage of expensive medical devices, from
And improve the success rate and economy of aneurysm blood flow guide type therapy.
In addition, said apparatus can use the intravascular stent of various structure and materials, independent of specific intravascular stent
Design and manufacturing process, improve the versatility that device is used.
Brief description of the drawings
Fig. 1 a-1b show the schematic diagram of the stent pushing system according to the utility model embodiment.
Fig. 2 a-2b show the schematic diagram of the string-of-pearls-like part in above-described embodiment.
Fig. 3 a-3d show the section signal designed according to the plurality of optional of the string-of-pearls-like part of the utility model embodiment
Figure.
Fig. 4 a-4b show the schematic diagram of the funnel component according to the utility model embodiment.
Fig. 5 a-5c show the schematic diagram of the blood flow guider according to the utility model embodiment.
Embodiment
The utility model is described by the form of embodiment below in conjunction with accompanying drawing, in order to skilled artisan understands that
The purpose of this utility model, technical scheme and advantage.It will be understood by those skilled in the art that the tool described in the form of embodiment
Body embodiment is merely exemplary, should not be construed as the restriction to the utility model protection domain.
Following description lists many details, to provide the detailed description to the embodiment in the application.However,
It will be understood by those skilled in the art that the reality in the utility model can be also realized in the case of not using these details
Apply example and its modification.In some cases, some technology contents well known in the art are not referred in embodiment, to avoid making this
The main points of utility model thicken.In addition, for convenience of description, phase is referred to identical reference in Figure of description
Same element.
Fig. 1 a-1b show the schematic diagram of the stent pushing system 10 according to the utility model embodiment, its be used for by
The intravascular stent that close net support described in text etc. has high metal coverage rate and low porosity is pushed to target location (for example, opening
At the aneurysm put), wherein, Fig. 1 a are side views, and Fig. 1 b are profiles.As illustrated, stent pushing system 10 is by multiple members
Part is constituted, including：Develop head end 11, string-of-pearls-like part 12, funnel component 13, push seal wire 14.Further, stent pushing system
System 10 also includes：Developing mark band 15, proximal coil 16, heat-shrink tube 17 and the and of splicing portion 18 positioned at development head end 11 two ends
Splicing portion 19 positioned at the two ends of proximal coil 16.The above-mentioned part of stent pushing system 10 is illustrated below.
The head end 11 that develops is located on the distal end of stent pushing system 10, is set with the distal end for ensuring whole supplying system in perspective
It is visible under standby, so as to help to recognize its position and the direction of motion relative to peripheral vessels in PCI.As schemed
Show, in one embodiment, development head end 11 can be in coiled type, and can be by platinum, platinum alloy (for example, platinum 92%, tungsten
8%), tantalum or radiopaque polymeric material etc. are made.
Further, since string-of-pearls-like part 12 is preferably made up of Metal wire material or coil, development head end 11 is additionally operable to make
Whole open ends of the distal end of string-of-pearls-like part 12 are drawn in and fixed, to avoid not closed wire or coil during push
Stab blood vessel or damage intravascular stent.Specifically, in one embodiment, such as the splicing for the near-end of head end 11 that develops in Fig. 1 a
Shown in portion 18, ultraviolet light (UV) solidification glue, epoxy resin or other polymers glue can be used to connect the materials such as agent with bonding mode
Both are fixed, it would however also be possible to employ both are fixed with welding manner for soldering paste.In addition, in this embodiment, showing
The distal end of shadow head end 11 also similarly has splicing portion 18, for covering developing head end-coil sharp edges that may be present, from
And avoid or minimize to damage blood vessel.In another embodiment, covering can be set on development head end 11, will
Whole open ends of the distal end of string-of-pearls-like part 12 are encapsulated within the covering.It will be understood by those skilled in the art that developing head
End 11 can be designed as with various suitable shapes and length, and the utility model does not make limitation to this.
The push seal wire 14 of stent pushing system 10 be usually designed to along proximally to distal end orient diameter gradually
Reduce and the front end similar to taper is presented, to make it have enough flexibilities, so as to allow supplying system 10 and blood vessel branch
Frame in the blood vessel of bending can flexible motion, to be channeled to therapentic part.Pushing seal wire 14 on the whole can be by ability
Metal, polymer, alloy, elastic material or shape-memory material are made known to domain, or push seal wire also can be by two kinds
Or a variety of different materials are made.Pushing seal wire has optional diameter (for example, distal end maximum gauge is between about 0.0127mm
(0.0005 inch) is between 0.97mm (0.038 inch)) and optional length (for example, between about 30cm to 300cm it
Between).
Further, stent pushing system 10 can also include being located at the heat-shrink tube 17 pushed outside seal wire 14.Heat-shrink tube
17 are located at the near-end for pushing seal wire 14, and remain external positioned at patient in interventional procedure, to indicate entirely to push away
Send relative position of the system in patient's body.In a preferred embodiment, heat-shrink tube 17 is by polyester (PET) or modification of nylon
(PEBAX) material is made.
As described above, the distal end of string-of-pearls-like part 12 is fixed on development head end 11.Meanwhile, string-of-pearls-like part 12
Near-end is fixed on the distal end for pushing seal wire 14.Similarly, string-of-pearls-like part 12 can be fixed using bonding mode and is pushed away
Send seal wire 14.In the embodiment shown in Fig. 1 a-1b, the distal end most external for pushing seal wire 14 is also sequentially socketed with developing mark band
15 and proximal coil 16.In this embodiment, developing mark band 15 is in cylinder, and can be by platinum alloy (for example, 90%
Platinum, 10% iridium) or other radiopaque materials be made, in PCI help recognize the near-end of stent pushing system 10
Position.In this embodiment, proximal coil 16 can be made up of stainless steel or other alloy materials.Due to pushing seal wire 14
Thin diameter forward end with taper, by that can prevent the tapered front end from being sent out during push in outside socket proximal coil 16
Raw bending, to ensure the elastic and flexibility for pushing seal wire 14.In one embodiment, the length of proximal coil 16 generally can be with
It is the whole a quarter for pushing the length of seal wire 14.In addition, in one embodiment, as shown in the splicing portion 19 in Fig. 1 a-1b,
Can by materials such as epoxy resin thermosetting glue, by proximal coil 16 be fixed on push seal wire 14 and with developing mark band
15 are glued.In another embodiment, it can be realized proximal coil 16, developing mark band 15 by the way of welding with pushing
The fixation of seal wire 14.In another embodiment, developing mark band 15 is protruded from the distal end for pushing seal wire 14, and is therefrom interleave
Enter string-of-pearls-like part 12, the distal end for pushing seal wire 14 reaches the middle of string-of-pearls-like part 12, while also reaching intravascular stent
Middle.In this embodiment, pushing the distal end of seal wire 14 has development structure.Therefore, when discharging support in operation, push away
The relative position of support and microtubular can be marked constantly by sending the development structure of the distal end of seal wire 14.
String-of-pearls-like part 12 is designed to be placed intravascular stent (for example, support 51 in Fig. 5 a) inside, and is controlled in intervention
During treatment, following functions are realized：1) after target location is reached, by pushing seal wire 14 by string-of-pearls-like part to distal end
12 release together with intravascular stent from conduit (not shown), support intravascular stent after the expansion segment expansion of string-of-pearls-like part 12
Open, so that intravascular stent can fully discharge in target location, and then it is contacted with the vascular wall of therapentic part；2) blood vessel is worked as
When the initial release position of support is dissatisfied, seal wire 14 is pushed by string-of-pearls-like part 12 and intravascular stent one by proximally retracting
Rise be recovered in conduit, make string-of-pearls-like part 12 and intravascular stent reenter microtubular (apparatus, does not show during operation) so as to
Compressive state is returned to, and then the off-position of intravascular stent can be readjusted, or when necessary, by intravascular stent and its pushed away
System 10 is sent integrally to be taken out from patient's body.
Fig. 2 a-2b show the schematic diagram of the string-of-pearls-like part 12 in above-described embodiment.In order to realize above-mentioned functions, bead string
Shape part 12 is configured to have substantially circular cross section (as shown in Figure 2 b), and with variable in its effective length
Cross-sectional diameter.In the embodiment shown in Fig. 2 a-2b, string-of-pearls-like part 12 is designed to by multiple (for example, 2) pearls
Expansion segment 21 and multiple (for example, 3) on-expansibles section 22 be arranged alternately compositions, the multiple expansion segment 21 and on-expansible sections 22
Be one it is continuous overall and can by Nitinol (Nitinol) alloy material or other alternative metals, alloy or
The elastic materials such as polymer or shape-memory material or piezoelectric are made.In one embodiment, string-of-pearls-like part 12 can
To be formed by many (for example, 6 to 64) nitinol silk braidings, and its count (filling density) can be corresponded between big
About 20PPI (picks per inch) is matched between 250PPI with the count with intravascular stent.It is preferred real at one
Apply in example, the string-of-pearls-like part 12 that can be about 65PPI using 24 nitinol silk counts.Accordingly, at this
In preferred embodiment, under complete release conditions, the length of each expansion segment 21 is about 5mm, and maximum gauge is about 2mm,
Matched with the internal diameter with intravascular stent (for example, be equal to, be slightly less than or less than the internal diameter of intravascular stent).Accordingly, at this
In preferred embodiment, under complete release conditions, the length of each on-expansible section 22 in the middle of string-of-pearls-like part 12 can be with
About 5mm, the length positioned at each on-expansible section 22 at the two ends of string-of-pearls-like part 12 is at least about 6mm.Those skilled in the art
It is appreciated that can also to be configured to have other suitably sized for expansion segment 21 and on-expansible section 22.In addition, art technology
Personnel are further appreciated that the number for the expansion segment 21 that can be determined according to the length of intravascular stent in string-of-pearls-like part 12, with
The effective length of string-of-pearls-like part 12 and the length of intravascular stent is set to match.In a preferred embodiment, expansion segment 21
Number, the number of the combination of on-expansible section 22 or both can change between 1 to 40.
The minimum cross sectional diameter of string-of-pearls-like part 12 can be determined using various ways.In the reality shown in Fig. 2 a-2b
Apply in example, open end diameter (the i.e. near-end of the near-end of string-of-pearls-like part 12 is designed according to the internal diameter of cylindric developing mark band 15
On-expansible section 22 diameter), so that the open end of string-of-pearls-like part 12 can be suitably through developing mark band 15 and with pushing away
Seal wire 14 is sent to be socketed.Similarly, the open end diameter (i.e. the diameter of the on-expansible section 22 of distal end) of the distal end of string-of-pearls-like part 12 is big
The proximal diameter equal to development head end 11 is caused, in order to which both are fixed.For the purpose of convenient processing and manufacturing, in Fig. 2 a-2b
In shown embodiment, each expansion segment 21 of inside of string-of-pearls-like part 12 and on-expansible section 22 two-by-two connection end diameter also substantially
Equal to the internal diameter of developing mark band 15, but design of the utility model to string-of-pearls-like part 12 is not limited to this.This area skill
Art personnel are appreciated that can be according to the shape of the material of string-of-pearls-like part, size, manufacturing process and expansion segment come neatly
Determine the diameter of on-expansible section.
Turning now to Fig. 3 a-3d, set it illustrates the plurality of optional of the string-of-pearls-like part according to the utility model embodiment
Count 12a-12d diagrammatic cross-section.It will be understood by those skilled in the art that these it is optional be designed only for for example, rather than
Limitation is made to the utility model.
In Fig. 3 a and Fig. 3 b, string-of-pearls-like part 12a and 12b are respectively designed to the expansion with oblate spheroid and the bipyramid bodily form
Section is opened, so that it has variable cross-sectional diameter in effective length.String-of-pearls-like part 12a and 12b on-expansible section and
Other designs are similar with string-of-pearls-like part 12, repeat no more here.
Fig. 3 c show the exemplary design 12c of string-of-pearls-like part, and it has spherical expansion segment.With Fig. 2 a-2b and figure
Unlike the design shown in 3a-3b, string-of-pearls-like part 12c does not have corresponding on-expansible section between expansion segment, i.e., straight
The continuous arrangement of multiple expansion segments was connected to constitute the string-of-pearls-like part, and only have at two ends on-expansible section, with branch
The other elements connection of frame supplying system.String-of-pearls-like part 12c manufacture material and technique is similar with string-of-pearls-like part 12, here
Repeat no more.
Fig. 3 d show the exemplary design 12d of string-of-pearls-like part.With the manufacture work of string-of-pearls-like part 12 and 12a-12c
Skill is different, and string-of-pearls-like part 12d is designed to be made up of flexible coil, and alternately has at least in effective length
Two kinds of different diameters.According to the description above with respect to string-of-pearls-like part 12, it will be understood by those skilled in the art that constituting bead string
The maximum gauge of shape part 12d coil can be designed as matching with the internal diameter with intravascular stent.
String-of-pearls-like in the stent pushing system of the utility model offer is provided above in association with Fig. 2 a-2b and Fig. 3 a-3d
The various exemplary implementation of part.It will be understood by those skilled in the art that can also using other shapes expansion segment or
The a variety of expansion segments of different shapes of person and on-expansible section combines to constitute the string-of-pearls-like part in the utility model, and these
The possible design for contributing to support to open should be also fallen within protection domain of the present utility model.
Fig. 4 a-4b show the signal of the funnel component 13 in the stent pushing system according to the utility model embodiment
Figure, wherein, Fig. 4 a are side views, and Fig. 4 b are stereograms.Similar with string-of-pearls-like part 12, funnel component 13 can also be by Nitinol
Or elastic material, shape-memory material or the piezoelectric such as other metals, alloy or polymer are made, and by filament material
Material braiding is made.As illustrated, the distal end of funnel component 13 is funnel structure 41, it is also designed to substantially circular
Cross section, and along the direction for proximally arriving distal end, its cross section is gradually transitioned into maximum gauge from minimum diameter.At one
In embodiment, the maximum gauge is designed to be more than near-end of (for example, being slightly larger than) intravascular stent under complete release conditions most
Major diameter, so as to intactly cover the near-end of intravascular stent.The near-end of funnel component 13 is closed end 42, and it is designed to
Cylindric and open end with the near-end of string-of-pearls-like part 12, seal wire 14 is pushed by order socket from outside to inside.Can be according to aobvious
Shadow marks the internal diameter of band 15 to design the diameter of closed end 42, so that closed end 42 suitably can pass through developing mark band 15 simultaneously
It is socketed with string-of-pearls-like part 12, push seal wire 14.
In one embodiment, funnel component 13 can be by the braiding of many (for example, 4 to 24) nitinols silk
Into, the funnel structure of its distal end length can between about 2mm between 10mm and in the axial direction with intravascular stent at least
Partly overlap, or can be designed as covering part or the whole length of intravascular stent under compression.At one preferably
In embodiment, funnel component 13 can be woven using 16 nitinol silks.Accordingly, in this preferred embodiment,
Under complete release conditions, the funnel structure length of the distal end of funnel component 13 is about 5mm, and the maximum gauge of funnel is about
6mm.It will be understood by those skilled in the art that can also to be configured to have other suitably sized for funnel component 13.Another
In individual preferred embodiment, funnel component 13 is made up of filament material weaving, is allocated as by filament bend and using bending section
For funnel structure 41, therefore openend is by not sharp keen tip, and all open tips are come together in into the side of closed end 42,
So as to avoid or minimize to damage blood vessel.
Funnel component 13 can help to realize the abundant release and recovery behaviour to intravascular stent together with string-of-pearls-like part 12
Make.String-of-pearls-like part 12 and pars infundibularis in the release of intravascular stent and reclaimer operation are described by other accompanying drawings are combined further below
The role of part 13.
Fig. 5 a-5c show the schematic diagram of the blood flow guider 50 according to the utility model embodiment, wherein, in Fig. 5 a
The device shown is in the device shown in part release conditions, Fig. 5 b and is in compressive state, and Fig. 5 c are Fig. 5 b parts
Enlarged drawing.As illustrated, blood flow guider 50 is obtained on the basis of stent pushing system 10.Specifically, except composition branch
The development head end 11 of frame supplying system 10, string-of-pearls-like part 12, funnel component 13, push seal wire 14 (not shown in Fig. 5 a), it is aobvious
Shadow mark band 15, proximal coil 16, heat-shrink tube 17 (not shown in Fig. 5 a) and the splicing portion 18 positioned at development head end 11 two ends
With outside the splicing portion 19 at the two ends of proximal coil 16, blood flow guider 50 also includes intravascular stent 51 and guide wire 52.
Intravascular stent 51 is placed in the outside of string-of-pearls-like part 12, and under complete release conditions, its length can be big
Cause the length equal to or slightly less than string-of-pearls-like part 12.The intravascular stent 51 can be using techniques known in the art (for example, compiling
Weaving process, coating technique, laser cutting etc.) and material (for example, metal, alloy, polymer etc.) manufacture, the utility model pair
This does not make limitation.It will be understood by those skilled in the art that the diameter and length of intravascular stent 51 depend on endovascular treatment
The situation at position.In one embodiment, the diameter of intravascular stent 51 is between about 2mm between 10mm, and length is between about
5mm is between 100mm.
Blood flow guider 50 shown by Fig. 5 a is in part release conditions.In this condition, the He of string-of-pearls-like part 12
A part for intravascular stent 51 is released from guide wire 52, wherein, intravascular stent 51 is in natural resiliency and string-of-pearls-like portion
Fully extend, and contacted with the vascular wall of therapentic part in the presence of the radial tension of part 12.Further, proceed to push
Operation will be such that intravascular stent is released to completely in blood vessel.Then, by pushing seal wire 14 towards proximal retraction, support can be pushed away
Send system 10 to retract in guide wire 52, and then complete the push operation of intravascular stent.
Meanwhile, the structure design based on string-of-pearls-like part 12 and funnel component 13, blood flow guider 50 can also be in blood
Before pipe holder 51 is not completely released, it is recovered in conduit.
Blood flow guider 50 shown by Fig. 5 b is in compressive state.In this condition, blood flow guider 50 is each
Individual element is constrained within the tube chamber of guide wire 52 so that whole blood flow guider 50 in compressive state (or just
Beginning state).
In this condition, string-of-pearls-like part 12 shrinks in the presence of radial pressure, compares release conditions so as to make it have
Lower less diameter and length.Correspondingly, the string-of-pearls-like part 12 after being compressed produces radial tension, so as to provide friction
Power, drives intravascular stent 51 to be moved in the axial direction to distal end or near-end during push or reclaimer operation.Because string-of-pearls-like portion
Expansion segment on part 12 has the diameter of gradual change, so easily can be pulled in during reclaimer operation into conduit.
Meanwhile, in this condition, the funnel structure of the distal end of funnel component 13 also shrinks in the presence of radial pressure, and
Because funnel structure is least partially overlapped in the axial direction with intravascular stent 51, it is covered to the proximal part of intravascular stent 51 simultaneously
Radial pressure is produced to intravascular stent 51, so as to provide frictional force, can also play and pass through during push or reclaimer operation
Frictional force drives the effect that intravascular stent 51 is moved in the axial direction together.Further, since funnel component 13 is effectively covered in
The near-end of intravascular stent 51, therefore when reclaiming intravascular stent 51 into guide wire 52, the funnel component 13 can anti-hemostatic tube
The near-end of support 51 is directed to pipe 52 and bent, so that apparatus can import microtubular again.
Fig. 5 c are Fig. 5 b partial enlarged drawings, and it illustrates string-of-pearls-like part 12 under compression, intravascular stent 51, leakage
Correlative positional relation of the pan part 13 in guide wire 52.
Guide wire 52 is used to make blood flow guider 50 and intravascular stent 51 be maintained at initial compressive state.Starting to connect
When entering to treat, guide wire 52 can be inserted in the tube head of conduit.The two ends of guide wire 52 are usually round and smooth taper, and can
So that by material manufactures known in the art such as high density polyethylene (HDPE)s (HDPE), the utility model does not make limitation to this.
The stent pushing system of the utility model offer, corresponding blood are provided by way of examples above in association with accompanying drawing
Flow guide device.Said apparatus can be used for aneurysmal treatment, and with intravascular stent be easy to release, it is recuperable
Characteristic, while interventional therapy operation risk is reduced, can also reduce the scrappage of expensive medical devices, so as to improve artery
The success rate and economy of knurl blood flow guide type therapy.In addition, said apparatus goes for the blood vessel of various structure and materials
Support, independent of the design of specific intravascular stent and manufacturing process, improves the versatility that device is used.
" example/exemplary " used in the utility model specification represents to be used as example, illustration or explanation.In specification
Any technical scheme for being described as " exemplary " is not necessarily to be construed as than other technologies scheme more preferably or more advantage.
The utility model provides the above description to disclosed technology contents, so that those skilled in the art can be real
Show or use the utility model.To those skilled in the art, many modification and variation to these technology contents are all
It will be apparent that and general principles defined in the utility model can also not depart from spirit or scope of the present utility model
On the basis of be applied to other embodiment.Therefore, the utility model is not limited to specific embodiment illustrated above, but should be with
The widest scope for meeting utility model design disclosed in the utility model is consistent.
Claims (23)
1. a kind of stent pushing system, it is characterised in that including：
Develop head end, and it is located at the distal end of the stent pushing system；
String-of-pearls-like part, it includes at least one expansion segment；
Funnel component, it include positioned at distal end funnel structure and the closed end positioned at near-end, and along proximally arrive distally
Direction, the cross section of the funnel structure is gradually transitioned into maximum gauge from minimum diameter；
Seal wire is pushed, it is located at the near-end of the stent pushing system；
Wherein, the distal end of the string-of-pearls-like part is fixed on the development head end, and the near-end of the string-of-pearls-like part is consolidated
It is scheduled on the push seal wire；
Wherein, the funnel component is socketed with the string-of-pearls-like part and the push seal wire, and passes through the closed end quilt
It is fixed on the push seal wire.
2. stent pushing system according to claim 1, it is characterised in that the string-of-pearls-like part, which is included in, axially to be submitted
Multiple expansion segments and multiple on-expansibles section for arrangement.
3. stent pushing system according to claim 1, it is characterised in that the string-of-pearls-like part includes multiple in axial direction
On the on-expansibles section that is located at two ends of the expansion segment continuously arranged and two.
4. stent pushing system according to claim 1, it is characterised in that the expansion segment includes coil, the coil
Including at least two parts with different-diameter.
5. stent pushing system according to claim 1, it is characterised in that the most external socket of the push wire distal
There is proximal coil, the proximal coil is fixed on the push seal wire.
6. stent pushing system according to claim 5, it is characterised in that the most external of the push wire distal also covers
Developing mark band is connected to, the developing mark band is located at the distal end of the proximal coil, and is fixed on the proximal coil
On.
7. stent pushing system according to claim 1, it is characterised in that the near-end of the push seal wire is also socketed with heat
The draw.
8. the stent pushing system according to Claims 2 or 3, it is characterised in that the expansion segment include it is following in extremely
Few one kind：Bicone structure, spherical structure, oblate spheroid structure, long spherical structure.
9. the stent pushing system according to Claims 2 or 3, it is characterised in that the string-of-pearls-like part and the funnel
Part is made up of elastic material, shape-memory material or piezoelectric.
10. the stent pushing system according to Claims 2 or 3, it is characterised in that the string-of-pearls-like part and the funnel
Part is made up of filament material weaving.
11. stent pushing system according to claim 10, it is characterised in that the string-of-pearls-like part uses 6 to 64
Filament material braiding is made, and the funnel component is made of 4 to 24 filament material braidings.
12. stent pushing system according to claim 10, it is characterised in that the count of the string-of-pearls-like part is situated between
In 20PPI between 250PPI.
13. the stent pushing system according to claim 1,5 or 6, it is characterised in that the development head end, the bead string
It is solid with bonding mode between shape part, the funnel component, the push seal wire, the developing mark band, the proximal coil
It is fixed.
14. stent pushing system according to claim 13, it is characterised in that the development head end and the string-of-pearls-like portion
Ultraviolet light (UV) solidification glue is used to be fixed with bonding mode between part.
15. stent pushing system according to claim 13, it is characterised in that the string-of-pearls-like part, the pars infundibularis
Epoxy resin thermosetting glue is used with bonding mode between part, the push seal wire, the developing mark band, the proximal coil
It is fixed.
16. stent pushing system according to claim 1, it is characterised in that the development head end is provided with covering, with
Whole open ends of the string-of-pearls-like distal end are encapsulated within the covering.
17. a kind of blood flow guider, including intravascular stent, stent pushing system, guide wire, wherein, in an initial condition, institute
Intravascular stent, the stent pushing system is stated to be constrained among the tube chamber of the guide wire, it is characterised in that
The stent pushing system includes：Develop head end, and it is located at the distal end of the stent pushing system；String-of-pearls-like part, its
Including at least one expansion segment；Funnel component, it includes the funnel structure and the closed end positioned at near-end positioned at distal end, and edge
The direction proximally to distal end, the cross section of the funnel structure is gradually transitioned into maximum gauge from minimum diameter；Push is led
Silk, it is located at the near-end of the stent pushing system；
Wherein, the distal end of the string-of-pearls-like part is fixed on the development head end, and the near-end of the string-of-pearls-like part is consolidated
It is scheduled on the push seal wire；And wherein, the funnel component is socketed with the string-of-pearls-like part and the push seal wire, and
And be fixed on by the closed end on the push seal wire；
Wherein, under the original state, the intravascular stent is located at the outside of the string-of-pearls-like part, and the pars infundibularis
The funnel structure of part at least covers the part that the intravascular stent is located at near-end.
18. blood flow guider according to claim 17, it is characterised in that the number and maximum gauge of the expansion segment
It is to be determined respectively according to the length and diameter of the intravascular stent.
19. blood flow guider according to claim 17, it is characterised in that compared with complete release conditions, often
Length is shorter under the original state and maximum gauge is smaller for the individual expansion segment.
20. blood flow guider according to claim 17, it is characterised in that under complete release conditions, the funnel
The maximum gauge of the funnel structure of part is more than the near-end maximum gauge of the intravascular stent.
21. blood flow guider according to claim 17, it is characterised in that the most external set of the push wire distal
Proximal coil is connected to, the proximal coil is fixed on the push seal wire.
22. blood flow guider according to claim 21, it is characterised in that the most external of the push wire distal is also
Developing mark band is socketed with, the developing mark band is located at the distal end of the proximal coil, and is fixed on the proximal wire
On circle.
23. blood flow guider according to claim 17, it is characterised in that the near-end of the push seal wire is also socketed with
Heat-shrink tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621202835.6U CN206491831U (en) | 2016-11-08 | 2016-11-08 | Stent pushing system and corresponding blood flow guider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621202835.6U CN206491831U (en) | 2016-11-08 | 2016-11-08 | Stent pushing system and corresponding blood flow guider |
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| Publication Number | Publication Date |
|---|---|
| CN206491831U true CN206491831U (en) | 2017-09-15 |
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ID=59799967
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621202835.6U Active CN206491831U (en) | 2016-11-08 | 2016-11-08 | Stent pushing system and corresponding blood flow guider |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018086464A1 (en) * | 2016-11-08 | 2018-05-17 | Yiran Lu | Stent delivery system, corresponding flow diversion device, and assembly method of flow diversion device |
| WO2022089292A1 (en) * | 2020-10-30 | 2022-05-05 | 艾柯医疗器械(北京)有限公司 | Bead-string-shaped component, manufacturing method therefor and use thereof |
| WO2023005089A1 (en) * | 2021-07-30 | 2023-02-02 | 上海暖阳医疗器械有限公司 | Blood-flow-directed stent delivery system |
| CN115813626A (en) * | 2022-10-18 | 2023-03-21 | 上海心玮医疗科技股份有限公司 | Blood flow guider's transport seal wire |
| CN115998496A (en) * | 2023-03-27 | 2023-04-25 | 艾柯医疗器械(北京)股份有限公司 | Segmented expansion member, delivery device and vascular implant system incorporating the same |
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2016
- 2016-11-08 CN CN201621202835.6U patent/CN206491831U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018086464A1 (en) * | 2016-11-08 | 2018-05-17 | Yiran Lu | Stent delivery system, corresponding flow diversion device, and assembly method of flow diversion device |
| CN108056798A (en) * | 2016-11-08 | 2018-05-22 | 吕怡然 | Stent pushing system and corresponding blood flow guider and blood flow guider assembly method |
| CN108056798B (en) * | 2016-11-08 | 2021-06-04 | 艾柯医疗器械(北京)有限公司 | Support pushing system, corresponding blood flow guiding device and blood flow guiding device assembling method |
| WO2022089292A1 (en) * | 2020-10-30 | 2022-05-05 | 艾柯医疗器械(北京)有限公司 | Bead-string-shaped component, manufacturing method therefor and use thereof |
| WO2023005089A1 (en) * | 2021-07-30 | 2023-02-02 | 上海暖阳医疗器械有限公司 | Blood-flow-directed stent delivery system |
| CN115813626A (en) * | 2022-10-18 | 2023-03-21 | 上海心玮医疗科技股份有限公司 | Blood flow guider's transport seal wire |
| CN115998496A (en) * | 2023-03-27 | 2023-04-25 | 艾柯医疗器械(北京)股份有限公司 | Segmented expansion member, delivery device and vascular implant system incorporating the same |
| CN115998496B (en) * | 2023-03-27 | 2023-05-26 | 艾柯医疗器械(北京)股份有限公司 | Segmented expansion member, delivery device and vascular implant system incorporating the same |
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Address after: 101300 Beijing Shunyi District Nancai Town Caida 3rd Street No. 1 Maohua Workshop No. 3 Floor 1 101 Patentee after: Eco Medical Devices (Beijing) Co.,Ltd. Address before: 101300 Beijing Shunyi District Nancai Town Caida 3rd Street No. 1 Maohua Workshop No. 3 Floor 1 101 Patentee before: Aike Medical Devices (Beijing) Co.,Ltd. |