CN106580531A - Delivery system for expandable stent - Google Patents
Delivery system for expandable stent Download PDFInfo
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- CN106580531A CN106580531A CN201710062864.XA CN201710062864A CN106580531A CN 106580531 A CN106580531 A CN 106580531A CN 201710062864 A CN201710062864 A CN 201710062864A CN 106580531 A CN106580531 A CN 106580531A
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- Prior art keywords
- core component
- bounce
- hydraulic
- bulge loop
- proof device
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2002/9528—Instruments specially adapted for placement or removal of stents or stent-grafts for retrieval of stents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention provides a delivery system for an expandable stent and relates to the technical field of stent delivery. The delivery system comprises an inner core assembly, wherein the inner core assembly comprises a core member and a wire guide tube cavity formed in the core member; an anti-jump device is formed on the core member; one end of the anti-jump device is bent towards the center direction deviating from the core member so as to form a bending end for fixing the stent; a hydraulic system comprises a first infusion channel and a second infusion channel formed in the core member; a membrane outer sheath is arranged on the outer side of the hydraulic system and the inner core assembly in a sleeving manner; a one-way limiting structure is formed in the inner surface of the membrane outer sheath so as to guarantee that the membrane outer sheath is in limited sliding contact with the outer surface of a hydraulic tube. According to the delivery system for the expandable stent provided by the invention, due to repeated operations of the hydraulic system, the membrane outer sheath retracts, and in the membrane outer sheath retracting process, the stent can be slowly released during automatic expansion by the anti-jump device and forward jump of the stent after restraint removal can be effectively prevented; therefore, the release position is accurate.
Description
Technical field
The present invention relates to the technical field of stent delivery device, more particularly, to a kind of delivering system for expandable stent
System.
Background technology
PCI, is that for developing rapidly in recent years has merged diagnostic imaging and clinical treatment in the emerging of one
Subject.It is under the guiding and monitoring of the image documentation equipments such as digital subtraction angiography machine, CT, ultrasound and magnetic resonance, using wearing
Pricker, conduit and other interposers materials, human lesion is imported by human body natural duct or small wound by specific apparatus
Position carries out a series of general name of technologies of minimally-invasive treatment.The clinic three arranged side by side with traditional internal medicine, surgery is had become at present
Big pillar subject.
Now, PCI often can be used in the treatment of human vas support, for the support of human vas, after compression
Configuration is loaded in sleeve pipe, and then is implanted in patient's body with minimizing, and support after compression is transported to target location
When, discharge support by recalling outer sleeve or releasing on support.But, length can substantially shorten when support is sufficiently spread out,
And because outer sleeve compresses support originally, when moving to sleeve pipe and being not enough to provide enough binding forces to support, support meeting
Rapidly depart from, this unexpected release of generation can cause support to deviate target site.Additionally, releasing in the tube chamber with fluid
Support is put, causes the instantaneous high pressure that fluid blocking is produced be shifted over support because support discharges moment.
Therefore, existing stent delivery device spring of support when support is discharged makes support inaccurate in lesion positioning, makes
The degree-of-difficulty factor increasing that support is accurately supported on pathology stenosis is obtained, be need to improve.
The content of the invention
It is an object of the invention to provide a kind of delivery system for expandable stent, by the multiple behaviour of hydraulic system
Make that film epitheca is withdrawn, during film epitheca withdraws, bounce-proof device can ensure that support in automatic expansion
The spring forward for slowly discharging and effectively preventing after support constraint releasing is able to, so as to off-position accurately, in addition, by elasticity
Component is slidably matched with slip bulge loop so that plays certain cushioning effect to stent expansion when film epitheca withdraws, prevents
Deformation of timbering, alleviating the spring of support when support is discharged of existing stent delivery device makes support inaccurate in lesion positioning,
So that support is accurately supported on the problem that the degree-of-difficulty factor of pathology stenosis is increased, this apparatus structure is simple, low cost, beneficial to big
Area is promoted the use of.
A kind of delivery system for expandable stent that the present invention is provided, including：
Its components, its components include core component and are arranged in the core component and along the core component
The guidewire lumen that central axis is formed, circumference is formed with bounce-proof device, and the bounce-proof on the outer surface of the core component
Device near the core component seal wire output end, one end away from the seal wire output end of the bounce-proof device with it is described
The outer surface of core component is connected, and the other end of the bounce-proof device is bent to form curved to the center position away from the core component
Folding end, circumference is formed with fixed bulge loop on the outer surface of the core component, and the fixed bulge loop is near the bounce-proof device
One end is provided with elastic parts, and the free end of the elastic parts is provided with the slip bulge loop for coordinating with the elastic parts, and
The support in compressive state is provided between the slip bulge loop and the bounce-proof device, one end of the support is against institute
State on slip bulge loop, the other end is against in the bending end of the bounce-proof device；
Hydraulic system, the hydraulic system includes that the first infusion channel being arranged in the core component and the second transfusion are logical
Road, first infusion channel and second infusion channel are arranged in parallel respectively with the guidewire lumen, and first liquid
Pressure passageway is formed with the first opening of insertion on the side wall of the core component, and second hydraulic channel is in the core component
The second opening of insertion is formed with the wall of side, piston bulge loop is circumferentially with the outer surface of the core component, and described first opens
Mouth and the described second opening are separately positioned on the both sides of the piston bulge loop, and on the outer surface of the core component hydraulic pressure is arranged with
Manage, and first opening, second opening and the piston bulge loop are arranged in the hydraulic tube, described first opens
Mouthful, the first hydraulic pressure tube chamber, second opening, the piston bulge loop and institute are formed between the piston bulge loop and the hydraulic tube
State and formed between hydraulic tube the second hydraulic pressure tube chamber, and the inner surface of the hydraulic tube and the piston bulge loop sliding contact；
Film epitheca, the film epitheca is set in the outside of the hydraulic system and its components, and described thin
The inner surface of film epitheca is provided with unidirectional position limiting structure to ensure the film epitheca with the spacing cunning of the outer surface of the hydraulic tube
Dynamic contact：When the hydraulic tube slides towards the holder orientation, the film epitheca does not slide；When the hydraulic tube deviates from
When the holder orientation is slided, it is described thin to realize that the hydraulic tube drives the film epitheca to slide by unidirectional position limiting structure
Film epitheca withdraws.
Further, the bounce-proof device adopts two groups, and bounce-proof device described in two groups is along the core component
Central axis is arranged symmetrically.
Further, external diameter of the core component away from one end of the support is identical with shape with the hydraulic tube external diameter
The support of the film epitheca in pairs.
Further, the outer surface of the seal wire output end of the core component is arranged to cambered surface.
Further, the outer surface of the core component is provided with the bar-shaped trough for placing the bounce-proof device.
Further, the unidirectional position limiting structure is zigzag structure, and each tooth in the zigzag structure is straight
Angle lance tooth, and the tooth inclined-plane is towards the direction of the support.
Further, first opening is manhole.
Further, the bending end of the bounce-proof device is circular arc bending structure.
Further, the bounce-proof device adopts Nitinol material.
Further, the fixed bulge loop is identical with the external diameter of the slip bulge loop.
The invention provides a kind of delivery system for expandable stent, is caused thin by the multi-pass operation of hydraulic system
Film epitheca withdraws, and during film epitheca withdraws, bounce-proof device can ensure that support is able to slowly in automatic expansion
Spring forward after discharging and effectively prevent support constraint from releasing, so as to off-position accurately, in addition, by elastic parts and cunning
Dynamic bulge loop is slidably matched so that plays certain cushioning effect to stent expansion when film epitheca withdraws, prevents deformation of timbering,
This apparatus structure is simple, and low cost is used beneficial to spread.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the partial schematic sectional view of delivery system provided in an embodiment of the present invention；
Fig. 2 is the partial sectional view that core component provided in an embodiment of the present invention coordinates with piston bulge loop, fixed bulge loop；
Fig. 3 is the stereogram that core component provided in an embodiment of the present invention coordinates with piston bulge loop, fixed bulge loop；
Fig. 4 is A portions enlarged diagram in Fig. 2 provided in an embodiment of the present invention；
Fig. 5 is hydraulic tube partial sectional view one provided in an embodiment of the present invention；
Fig. 6 is hydraulic tube partial sectional view two provided in an embodiment of the present invention；
Fig. 7 is elastic parts structural representation provided in an embodiment of the present invention；
Fig. 8 is film epitheca structural representation provided in an embodiment of the present invention.
Icon：1- core components；2- guidewire lumens；3- bounce-proof devices；4- fixes bulge loop；5- elastic parts；6-
Slip bulge loop；7- supports；The infusion channels of 8- first；The infusion channels of 9- second；10- first is open；11- second is open；
12- piston bulge loops；13- hydraulic tubes；14- the first hydraulic pressure tube chambers；15- the second hydraulic pressure tube chambers；16- film epithecas；17- is mono-
To position limiting structure.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described enforcement
Example is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In embodiments of the present invention, it is stipulated that support release end is direction of advance, rightabout is to withdraw direction.
The invention provides a kind of delivery system for expandable stent, is caused thin by the multi-pass operation of hydraulic system
Film epitheca withdraws, and during film epitheca withdraws, bounce-proof device can ensure that support is able to slowly in automatic expansion
Spring forward after discharging and effectively prevent support constraint from releasing, so as to off-position accurately, in addition, by elastic parts and cunning
Dynamic bulge loop is slidably matched so that plays certain cushioning effect to stent expansion when film epitheca withdraws, prevents deformation of timbering,
This apparatus structure is simple, and low cost is used beneficial to spread.
According to Fig. 1 to Fig. 8, the invention provides a kind of delivery system for expandable stent, including inner core group
Part, hydraulic system and film epitheca.
In embodiments of the present invention, its components are used to realizing the transmission of support, film epitheca by whole hydraulic system and
Including its components are included, the injury effectively reduced to human body is contacted with people with the softness of film, by multi-pass operation hydraulic pressure system
Unite withdrawing for film epitheca, film epitheca realizes the release of support after withdrawing.
With reference to Fig. 1 to Fig. 4, according to Fig. 5 to Fig. 8, its components include core component 1 and be arranged in core component and
Along the guidewire lumen 2 that the central axis of core component is formed, bounce-proof device 3, and bounce-proof are formed with the outer surface of core component
Device near core component seal wire output end, one end away from seal wire output end of bounce-proof device and the outer surface phase of core component
Even, the support or oppose center position of off-chip component of the other end of bounce-proof device is bent to form bending end, circle on the outer surface of core component
It is formed with fixed bulge loop 4 week, fixed bulge loop is provided with elastic parts 5, the free end of elastic parts near one end of bounce-proof device
The slip bulge loop 6 for coordinating with elastic parts is provided with, and is provided between slip bulge loop and bounce-proof device in compression shape
The support 7 of state, one end of support is against on slip bulge loop, the other end is against in the bending end of bounce-proof device.
In embodiments of the present invention, it is arranged in core component and along the guidewire lumen that formed of central axis of core component, leads
Silk passes through effect of the guidewire lumen to guide and position；Bounce-proof device, support casing are formed with the outer surface of core component
In the outside of bounce-proof device, and bounce-proof device, near the seal wire output end of core component, such position is arranged can be effective
Release support.
In embodiments of the present invention, when support is discharged, support can be effective by the bending end of bounce-proof device
Forward spring of the support after constraint is released is prevented, additionally by the cooperation of elastic parts and slip bulge loop so that elastic parts
Compress under the stop of fixed bulge loop so that slip bulge loop both play a part of to prevent support from bouncing, support can be realized again
Cushioning effect in release, effectively prevents support to be deformed.
With reference to Fig. 1 to Fig. 4, according to Fig. 5 to Fig. 8, hydraulic system includes that the first transfusion being arranged in core component is logical
The infusion channel 9 of road 8 and second, the first infusion channel and the second infusion channel are arranged in parallel respectively with guidewire lumen, and the first liquid
Pressure passageway is formed with the first opening 10 of insertion on the side wall of core component, and the second hydraulic channel is formed on the side wall of core component
There is the second opening 11 of insertion, piston bulge loop 12, and the first opening and the second opening point are circumferentially with the outer surface of core component
The both sides of piston bulge loop are not arranged on, hydraulic tube 13, and the first opening, the second opening and work are arranged with the outer surface of core component
Plug bulge loop is arranged in hydraulic tube, and first is open, forms the first hydraulic pressure tube chamber 14 between piston bulge loop and hydraulic tube, and second opens
Mouthful, the second hydraulic pressure tube chamber 15, and the inner surface of hydraulic tube and piston bulge loop sliding contact are formed between piston bulge loop and hydraulic tube.
In embodiments of the present invention, the first infusion channel and the second infusion channel are arranged in parallel respectively with guidewire lumen, this
Spline structure is simple, and transfusion is convenient, while whole hydraulic tube is just divided into the first hydraulic pressure tube chamber and the by the setting of piston bulge loop
Two hydraulic pressure tube chambers, to carry out hydraulic operation below.
In embodiments of the present invention, by conveying liquid to the first liquid-transport pipe-line, simultaneously the second liquid-transport pipe-line extracts liquid out,
Also it is equivalent to give the pressurization of the first hydraulic pressure tube chamber, in this process, hydraulic tube is to withdrawing；After pressurizeing to a certain extent, instead
Coming over to the transfusion of the second liquid-transport pipe-line, simultaneously the first liquid-transport pipe-line extracts liquid out, is so also equivalent to add to the second hydraulic pressure tube chamber
Pressure, in this process, hydraulic tube marches forward.
According to Fig. 1, film epitheca 16 is set in the outside of hydraulic system and its components, and the interior table of film epitheca
Face is provided with unidirectional position limiting structure 17 to ensure the spacing sliding contact of outer surface of film epitheca and hydraulic tube：When hydraulic tube direction
When holder orientation is slided, film epitheca does not slide, and when hydraulic tube slides away from holder orientation, hydraulic tube is by unidirectional spacing knot
Structure drives film epitheca to slide to realize that film epitheca withdraws.
In embodiments of the present invention, film epitheca is set in the outside of hydraulic system and its components, can be in delivering dress
The injury to human body is reduced by the flexible structure of film epitheca when putting delivering stent, and is set on the inner surface of film epitheca
The unidirectional position limiting structure put, can thus cause the carrying out that hydraulic system constantly repeats to operate；
When hydraulic tube slides towards holder orientation, film epitheca does not slide；
When hydraulic tube slides away from holder orientation, hydraulic tube drives film epitheca to slide with reality by unidirectional position limiting structure
Existing film epitheca withdraws.
Film epitheca is driven to withdraw and hydraulic tube reset by the multiple hydraulic operation of hydraulic system, that is, hydraulic tube
Repeatedly alternating movement, finally realizes withdrawing for film epitheca.
Bounce-proof device adopts two groups, and two groups of bounce-proof devices are arranged symmetrically along the central axis of core component.
In embodiments of the present invention, the setting of two groups of bounce-proof devices, it is ensured that the support and support release to support
When the bounce-proof of support is acted on, naturally it is also possible to be arranged to other group numbers, as long as meeting use demand.
First opening can adopt following two situations with the setting of the second opening, and concrete condition is as follows.
Embodiment one
First opening 10 and the second opening 11 are arranged on along the same straight line of core component length direction arrangement.
In embodiments of the present invention, the first opening and the second opening are arranged point-blank, and the rectilinear direction and core
The axis direction of component is parallel, can thus cause the stress of the first hydraulic pressure tube chamber and the second hydraulic pressure tube chamber relatively uniform, when
Other positions can also be so arranged on, as long as meeting use demand.
Embodiment two
According to Fig. 2 to Fig. 4, the first opening can also be separately positioned on the not homonymy of guidewire lumen with the second opening,
In this programme, central axis of first liquid-transport pipe-line with the second liquid-transport pipe-line along core component is arranged symmetrically, such second transfusion
Pipeline just can be communicated directly with hydraulic tube, it is not necessary to which re-attached pipeline is by guidewire lumen in hydraulic tube, and structure is simple
Single, easy to operate, this programme is exactly using the present embodiment structure.
The support to be formed to film epitheca identical with hydraulic tube external diameter of external diameter of the core component away from one end of support.
In embodiments of the present invention, external diameter of the core component away from one end of support is identical with hydraulic tube external diameter, such knot
Structure not only can effectively play supporting role, while the outer surface of core component can also effectively with the list on film epitheca inner surface
Effectively coordinate to position limiting structure, film epitheca is withdrawn and plays certain auxiliary friction effect.
The outer surface of the seal wire output end of core component is arranged to cambered surface.
In embodiments of the present invention, the outer surface of the seal wire output end of core component is arranged to cambered surface, and globoidal structure just can be with
The injury that reduction is caused in delivery process to human body.
The outer surface of core component is provided with the bar-shaped trough for placing bounce-proof device.
In embodiments of the present invention, the outer surface of core component is provided with the bar-shaped trough for placing bounce-proof device, so,
When support is in compressive state, support just can be embedded in bar-shaped trough with the mating part of bending end, and reduction enters human body
Resistance and destructive power；The other end of bounce-proof device can also realize elastic connection by the connection with bar-shaped trough, to meet
The elastic deformation space of bounce-proof device during release support, meanwhile, after support release, bounce-proof device can also be embedded in bar-shaped trough
To facilitate whole device to withdraw.
Unidirectional position limiting structure is zigzag structure, and each tooth in zigzag structure is right angled triangle tooth, and tooth inclined-plane
Towards the direction of support.
In embodiments of the present invention, unidirectional stopping means is exactly the film in order to when hydraulic tube slides towards holder orientation
Epitheca will not slide with hydraulic tube, and hydraulic tube away from holder orientation slide when hydraulic tube drive film epitheca to withdrawing direction
Slide, so as to finally realize that film epitheca withdraws, without withdrawing because not limiting direction and cannot meet film epitheca to reverse
Effect, naturally it is also possible to using other structures.
First opening is manhole.
In embodiments of the present invention, the first opening smoothly realizes flowing for manhole to meet liquid, finally realizes liquid
Pressure is acted on, naturally it is also possible to using other structures, as long as meeting use demand.
Corresponding, the second opening is also adopted by manhole, naturally it is also possible to using other structures.
The bending end of bounce-proof device is circular arc bending structure.
In embodiments of the present invention, the bending end of bounce-proof device is circular arc bending structure, so can effectively be realized
Stop to support release, structure is smooth simple, naturally it is also possible to using other structures, as long as meeting use demand.
Bounce-proof device adopts Nitinol material.
In embodiments of the present invention, bounce-proof device adopts Nitinol material, elastic demand can be effectively ensured, certainly
Other materials can also be adopted, as long as meeting use demand.
Fixed bulge loop is identical with the external diameter of slip bulge loop.
In embodiments of the present invention, fixed bulge loop is identical with the external diameter of slip bulge loop, and design is convenient and active force is average, when
The structure that so can also be differed using external diameter, as long as meeting use demand.
Film epitheca is using in polyethylene (PE), polyethylene terephthalate (PET), nylon or polyurethane
Kind, above-mentioned any one material can meet the topology requirement of film.
Elastic parts adopts Nitinol material.
In embodiments of the present invention, elastic parts adopts Nitinol material, elastic demand can be effectively ensured, certainly
Other materials can be adopted, as long as meeting use demand.
This device in use, realizes guiding function, then by outside by the seal wire run through in guidewire lumen
Controller extracts liquid out to the first infusion channel infusion fluid, the second liquid-transport pipe-line, to realize that the first hydraulic tube cavity pressure is more than
Second hydraulic tube cavity pressure, realizes that hydraulic tube withdraws, and so as to drive film epitheca to withdraw, support obtains portion when film epitheca withdraws
Divide release, ensure to bounce forward by bending end；When extracting liquid out to the transfusion of the second liquid-transport pipe-line, the first liquid-transport pipe-line,
Realize that hydraulic tube advances, now film epitheca is motionless；Then repeated multiple times operation hydraulic system successively, finally realizes support whole
Release, after support release, due to bending end and the positioning action of slip bulge loop so that support is just released in lesion, with reality
Now to strutting at stenotic lesion, smoothly passage is remake, after support release, by continuing to advance this device, bounce-proof device
In the case of without support active force, original state is returned in the presence of natural resiliency restoring force, then by whole device
And seal wire is recalled.
Device using hydraulic system as untie support constraint power, improve whole device by property；By setting
The the first hydraulic pressure tube chamber put and the second hydraulic pressure tube chamber, another hydraulic pressure tube chamber Extract while a hydraulic pressure tube chamber is infused
Body so that hydraulic tube withdraws drive film epitheca and withdraws, and hydraulic system increases the compliance of whole system；Using film epitheca
Constraint support improves the crooking ability and handling capacity of whole delivery apparatus；Bounce-proof device and the connected mode of support, make
Obtain support slow in release process, stability is high；Whole device pliability is high, can not only be smooth by curved blood vessel, additionally it is possible to
Damage to blood vessel is preferably minimized.
The invention provides a kind of delivery system for expandable stent, is caused thin by the multi-pass operation of hydraulic system
Film epitheca withdraws, and during film epitheca withdraws, bounce-proof device can ensure that support is able to slowly in automatic expansion
Spring forward after discharging and effectively prevent support constraint from releasing, so as to off-position accurately, hydraulic system increase whole system
Compliance so that during film epitheca is withdrawn until support discharges, whole device stability is high, and any shifting will not occur
It is dynamic, it is ensured that to be accurately positioned；In addition, being slidably matched by elastic parts and slip bulge loop so that when film epitheca withdraws to
Certain cushioning effect is played in frame expansion, prevents deformation of timbering, and this apparatus structure is simple, and low cost makes beneficial to spread
With.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (10)
1. a kind of delivery system for expandable stent, it is characterised in that include：
Its components, its components include core component and are arranged in the core component and along the center of the core component
The guidewire lumen that axis is formed, is formed with bounce-proof device on the outer surface of the core component, and the bounce-proof device is close
The seal wire output end of the core component, the bounce-proof device is outer with the core component away from one end of the seal wire output end
Surface is connected, and the other end of the bounce-proof device is bent to form bending end to the center position away from the core component, described
Circumference is formed with fixed bulge loop on the outer surface of core component, and the fixed bulge loop is provided with bullet near one end of the bounce-proof device
Property component, the free end of the elastic parts is provided with the slip bulge loop for coordinating with the elastic parts, and it is described slide it is convex
The support in compressive state is provided between ring and the bounce-proof device, one end of the support is against the slip bulge loop
The upper, other end is against in the bending end of the bounce-proof device；
Hydraulic system, the hydraulic system includes the first infusion channel and the second infusion channel being arranged in the core component,
First infusion channel and second infusion channel are arranged in parallel respectively with the guidewire lumen, and first hydraulic pressure is logical
Road is formed with the first opening of insertion, side wall of second hydraulic channel in the core component on the side wall of the core component
On be formed with the second opening of insertion, be circumferentially with piston bulge loop on the outer surface of the core component, and first opening and
Second opening is separately positioned on the both sides of the piston bulge loop, and hydraulic tube is arranged with the outer surface of the core component, and
It is described first opening, it is described second opening and the piston bulge loop be arranged in the hydraulic tube, it is described first opening, it is described
The first hydraulic pressure tube chamber, second opening, the piston bulge loop and the hydraulic pressure are formed between piston bulge loop and the hydraulic tube
The second hydraulic pressure tube chamber, and the inner surface of the hydraulic tube and the piston bulge loop sliding contact are formed between pipe；
Film epitheca, the film epitheca is set in outside the outside of the hydraulic system and its components, and the film
The inner surface of sheath is provided with unidirectional position limiting structure to ensure that film epitheca slip spacing with the outer surface of the hydraulic tube connects
Touch：When the hydraulic tube slides towards the holder orientation, the film epitheca does not slide；When the hydraulic tube is away from described
When holder orientation is slided, the hydraulic tube drives the film epitheca to slide to realize outside the film by unidirectional position limiting structure
Sheath withdraws.
2. the delivery system for expandable stent according to claim 1, it is characterised in that the bounce-proof device is adopted
Two groups are used, and bounce-proof device is arranged symmetrically along the central axis of the core component described in two groups.
3. the delivery system for expandable stent according to claim 1, it is characterised in that the core component deviates from institute
State the external diameter support to be formed to the film epitheca identical with the hydraulic tube external diameter of one end of support.
4. the delivery system for expandable stent according to claim 1, it is characterised in that the seal wire of the core component
The outer surface of output end is arranged to cambered surface.
5. the delivery system for expandable stent according to claim 1, it is characterised in that the appearance of the core component
Face is provided with the bar-shaped trough for placing the bounce-proof device.
6. the delivery system for expandable stent according to claim 1, it is characterised in that the unidirectional position limiting structure
For zigzag structure, each tooth in the zigzag structure is right angled triangle tooth, and the tooth inclined-plane is towards the support
Direction.
7. the delivery system for expandable stent according to claim 1, it is characterised in that first opening is circle
Shape through hole.
8. the delivery system for expandable stent according to claim 1, it is characterised in that the bounce-proof device
Bending end is circular arc bending structure.
9. the delivery system for expandable stent according to claim 1, it is characterised in that the bounce-proof device is adopted
Use Nitinol material.
10. the delivery system for expandable stent according to claim 1, it is characterised in that the fixed bulge loop with
The external diameter of the slip bulge loop is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710062864.XA CN106580531B (en) | 2017-01-24 | 2017-01-24 | Delivery system for expandable stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710062864.XA CN106580531B (en) | 2017-01-24 | 2017-01-24 | Delivery system for expandable stent |
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| CN106580531A true CN106580531A (en) | 2017-04-26 |
| CN106580531B CN106580531B (en) | 2018-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710062864.XA Expired - Fee Related CN106580531B (en) | 2017-01-24 | 2017-01-24 | Delivery system for expandable stent |
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| CN110799150A (en) * | 2017-05-11 | 2020-02-14 | 图尔弗股份有限公司 | Delivery systems for delivering prosthetic heart valve devices and associated methods |
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| CN114748118A (en) * | 2022-06-15 | 2022-07-15 | 迈迪威(深圳)实业有限公司 | Chest surgery auxiliary device based on traction distraction and using method |
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| Publication number | Publication date |
|---|---|
| CN106580531B (en) | 2018-03-23 |
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