CN106580531B - Delivery system for expandable stent - Google Patents

Delivery system for expandable stent Download PDF

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Publication number
CN106580531B
CN106580531B CN201710062864.XA CN201710062864A CN106580531B CN 106580531 B CN106580531 B CN 106580531B CN 201710062864 A CN201710062864 A CN 201710062864A CN 106580531 B CN106580531 B CN 106580531B
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CN
China
Prior art keywords
core component
bounce
film
epitheca
proof device
Prior art date
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Expired - Fee Related
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CN201710062864.XA
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Chinese (zh)
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CN106580531A (en
Inventor
尹凯
张耀元
王祖发
张晶晶
蒋成林
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University of South China
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University of South China
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Priority to CN201710062864.XA priority Critical patent/CN106580531B/en
Publication of CN106580531A publication Critical patent/CN106580531A/en
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Publication of CN106580531B publication Critical patent/CN106580531B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • 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 kind of delivery system for expandable stent, it is related to support conveying technology field, including its components, its components include core component and the guidewire lumen being arranged in core component, formed with bounce-proof device on core component, the support or oppose center position of off-chip component of one end of bounce-proof device is bent to form bending end with fixed support；Hydraulic system includes the first infusion channel and the second infusion channel being arranged in core component；Film epitheca is set in the outside of hydraulic system and its components, and the inner surface of film epitheca is provided with unidirectional position limiting structure to ensure the spacing sliding contact in the outer surface of film epitheca and hydraulic tube.The invention provides a kind of delivery system for expandable stent, withdrawn by the multi-pass operation film epitheca of hydraulic system, during film epitheca is withdrawn, bounce-proof device can ensure that support is able to slowly discharge in automatic expansion and effectively prevents the spring forward after support constraint releasing, so as to which off-position is accurate.

Description

Delivery system for expandable stent
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, it is that one developed 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, specific apparatus is imported by human lesion by human body natural duct or small wound Position carries out a series of general name of technologies of minimally-invasive treatment.Have become the clinic three arranged side by side with traditional internal medicine, surgery at present Big pillar subject.
Now, PCI can be often used in the treatment of human vas support, for the support of human vas, after compression Configuration is loaded into sleeve pipe, and then is implanted to patient's body to minimize, and support after compression is transported to target location When, by recalling outer sleeve or releasing support, to discharge support.But support when being sufficiently spread out length can substantially shorten, And because outer sleeve compresses support originally, when being moved 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.In addition, released in the tube chamber with fluid Support is put, because support release moment causes instantaneous high pressure caused by fluid blocking to be shifted over support.
Therefore, the spring of support when discharging support of existing stent delivery device makes support inaccurate in lesion positioning, makes The degree-of-difficulty factor increasing that support is accurately supported on lesion stenosis is obtained, 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, passes through the multiple behaviour of hydraulic system Make that film epitheca is withdrawn, during film epitheca is withdrawn, bounce-proof device can ensure support in automatic expansion It is able to slowly discharge and effectively prevents the spring forward after support constraint releasing, so as to which off-position is accurate, in addition, passes through elasticity Component is with sliding being slidably matched for bulge loop so that plays certain cushioning effect when film epitheca is withdrawn to stent expansion, prevents Deformation of timbering, alleviating the spring of support when discharging support of existing stent delivery device makes support inaccurate in lesion positioning, So that the problem of degree-of-difficulty factor that support is accurately supported on lesion stenosis increases, the present apparatus is simple in construction, and cost is low, beneficial to big Area is promoted the use of.
A kind of delivery system for expandable stent provided by the invention, 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 on the outer surface of the core component, and the bounce-proof Device close to the core component seal wire output end, the bounce-proof device away from one end of the seal wire output end 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 End is rolled over, circumference is formed with fixed bulge loop on the outer surface of the core component, and the fixed bulge loop is close to 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 being used 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 the first infusion channel being arranged in the core component and the second transfusion is logical Road, first infusion channel and second infusion channel are arranged in parallel with the guidewire lumen respectively, and first liquid Pressure passageway first opening formed with insertion in the side wall of the core component, second hydraulic channel is in the core component The second opening formed with insertion, is circumferentially with piston bulge loop on the outer surface of the core component, and described first opens in side wall Mouth and the described second opening are separately positioned on the both sides of the piston bulge loop, and hydraulic pressure is arranged with the outer surface of the core component Pipe, and first opening, second opening and the piston bulge loop are arranged in the hydraulic tube, described first opens The first hydraulic pressure tube chamber, the second opening, the piston bulge loop and the institute are formed between mouth, the piston bulge loop and the hydraulic tube State and the second hydraulic pressure tube chamber is formed between hydraulic tube, and the inner surface of the hydraulic tube and the piston bulge loop sliding contact；
Film epitheca, the film epitheca are 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 spacing cunning in outer surface of the film epitheca and 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, the hydraulic tube drives the film epitheca slip described thin to realize by unidirectional position limiting structure Film epitheca is withdrawn.
Further, the bounce-proof device uses two groups, and bounce-proof device described in two groups is along the core component Central axis is arranged symmetrically.
Further, the core component is identical with shape away from the external diameter of one end of the support and the hydraulic tube external diameter The support of the paired film epitheca.
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 being used 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 uses Nitinol material.
Further, the fixed bulge loop is identical with the external diameter of the slip bulge loop.
It is thin by the multi-pass operation of hydraulic system the invention provides a kind of delivery system for expandable stent Film epitheca is withdrawn, and during film epitheca is withdrawn, bounce-proof device can ensure that support is able to slowly in automatic expansion Release and effective spring forward prevented after support constraint releasing, so as to which off-position is accurate, in addition, passing through elastic parts and cunning Dynamic bulge loop is slidably matched so that and certain cushioning effect is played when film epitheca is withdrawn to stent expansion, prevents deformation of timbering, The present apparatus is simple in construction, and cost is low, beneficial to promoting the use of a large area.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art, 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, other accompanying drawings can also be obtained according to these accompanying drawings.
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- Slide 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.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation Example is part of the embodiment of the present invention, rather than whole embodiments.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 the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ", The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected 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 specified that support release end is direction of advance, opposite direction is to withdraw direction.
It is thin by the multi-pass operation of hydraulic system the invention provides a kind of delivery system for expandable stent Film epitheca is withdrawn, and during film epitheca is withdrawn, bounce-proof device can ensure that support is able to slowly in automatic expansion Release and effective spring forward prevented after support constraint releasing, so as to which off-position is accurate, in addition, passing through elastic parts and cunning Dynamic bulge loop is slidably matched so that and certain cushioning effect is played when film epitheca is withdrawn to stent expansion, prevents deformation of timbering, The present apparatus is simple in construction, and cost is low, beneficial to promoting the use of a large area.
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, soft with film contacts the injury effectively reduced to human body with people, passes through 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 The guidewire lumen 2 formed along the central axis of core component, formed with bounce-proof device 3 on the outer surface of core component, and bounce-proof Device close to core component seal wire output end, bounce-proof device away from one end of seal wire output end 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 Week is provided with elastic parts 5, the free end of elastic parts formed with fixed bulge loop 4, fixed bulge loop close to one end of bounce-proof device Provided with the slip bulge loop 6 for coordinating with elastic parts, and slide and be provided between bulge loop and bounce-proof device in compression shape The support 7 of state, one end of support be against slide on bulge loop, the other end is against in the bending end of bounce-proof device.
In embodiments of the present invention, the guidewire lumen of the central axis formation in core component and along core component is arranged on, is led Silk passes through effect of the guidewire lumen to guide and position；Formed with bounce-proof device, support casing on the outer surface of core component In the outside of bounce-proof device, and bounce-proof device, close to the seal wire output end of core component, such position is set can be effective Discharge 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 releases is prevented, additionally by elastic parts and the cooperation for sliding bulge loop so that elastic parts Compressed under the stop of fixed bulge loop so that slips bulge loop both play a part of preventing support spring, 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, the first transfusion that hydraulic system includes 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 with guidewire lumen respectively, and the first liquid Pressure passageway first opening 10 formed with insertion in the side wall of core component, the second hydraulic channel is formed in 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 is arranged with the outer surface of core component, and first is open, second is open and living Plug bulge loop is arranged in hydraulic tube, forms the first hydraulic pressure tube chamber 14 between the first opening, piston bulge loop and hydraulic tube, second opens The second hydraulic pressure tube chamber 15, and the inner surface of hydraulic tube and piston bulge loop sliding contact are formed between mouth, 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 with guidewire lumen respectively, 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, the second liquid-transport pipe-line extracts liquid out simultaneously, 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, the first liquid-transport pipe-line extracts liquid out simultaneously to the transfusion of the second liquid-transport pipe-line, 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 in the 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 passes through unidirectional spacing knot Structure drives film epitheca to slide to realize that film epitheca is withdrawn.
In embodiments of the present invention, film epitheca is set in the outside of hydraulic system and its components, can be filled in delivering The injury to human body is reduced by the flexible structure of film epitheca when putting delivering stent, and set on the inner surface of film epitheca The unidirectional position limiting structure put, can thus cause hydraulic system constantly repeat carry out 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 is withdrawn.
Film epitheca is driven to withdraw what is resetted with hydraulic tube by the multiple hydraulic operation of hydraulic system, that is, hydraulic tube Multiple alternating movement, finally realize withdrawing for film epitheca.
Bounce-proof device uses 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 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.
The setting of first opening and the second opening can use following two situations, 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 set point-blank, and the rectilinear direction and core The axis direction of component is parallel, can thus make it that the stress of the first hydraulic pressure tube chamber and the second hydraulic pressure tube chamber is 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, the first liquid-transport pipe-line is arranged symmetrically with the second liquid-transport pipe-line along the central axis of core component, such second transfusion Pipeline can directly communicates with hydraulic tube, it is not necessary to which re-attached pipeline is by the way that in guidewire lumen to hydraulic tube, structure is simple Single, easy to operate, this programme is exactly to use 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 can not only effectively play supporting role, while the outer surface of core component can also be 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, globoidal structure can Reduce the injury to caused by human body in delivery process.
The outer surface of core component is provided with the bar-shaped trough for being used 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 being used for placing bounce-proof device, so, When support is in compressive state, the mating part can of support and bending end is embedded into bar-shaped trough, 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 when discharging 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 is withdrawn, without that can not meet that film epitheca is withdrawn because not limiting direction to reverse Effect, naturally it is also possible to use other structures.
First opening is manhole.
In embodiments of the present invention, first opening for manhole to meet that liquid smoothly realizes flowing, finally realize liquid Pressure acts on, naturally it is also possible to other structures is used, as long as meeting use demand.
Corresponding, the second opening also uses manhole, naturally it is also possible to uses 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 are smoothly simple, naturally it is also possible to other structures are used, as long as meeting use demand.
Bounce-proof device uses Nitinol material.
In embodiments of the present invention, bounce-proof device uses Nitinol material, elastic demand can be effectively ensured, certainly Other materials can also be used, as long as meeting use demand.
Fixed bulge loop is identical with the external diameter for sliding bulge loop.
In embodiments of the present invention, fixed bulge loop is identical with the external diameter for sliding bulge loop, and design is convenient and active force is averaged, when The structure that can also so use external diameter to differ, as long as meeting use demand.
Film epitheca uses one in polyethylene (PE), polyethylene terephthalate (PET), nylon or polyurethane Kind, any one above-mentioned material can meet the topology requirement of film.
Elastic parts uses Nitinol material.
In embodiments of the present invention, elastic parts uses Nitinol material, elastic demand can be effectively ensured, certainly Other materials can be used, as long as meeting use demand.
The present apparatus realizes guiding function in use, by the seal wire run through in guidewire lumen, then passes through outside 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 is withdrawn, and so as to drive film epitheca to withdraw, support obtains portion when film epitheca is withdrawn 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, support whole is finally realized Release, after support release, due to the positioning action of bending end and slip bulge loop so that support is just discharged in lesion, with reality Now to being strutted at stenotic lesion, smoothly passage is remake, after support release, by continuing to promote the present apparatus, bounce-proof device In the case of no 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, as the power untied support and fettered, improves the passing through property of whole device using hydraulic system；By setting The the first hydraulic pressure tube chamber and the second hydraulic pressure tube chamber put, another hydraulic pressure tube chamber Extract while transfusion by a hydraulic pressure tube chamber Body so that hydraulic tube, which is withdrawn, drives film epitheca to withdraw, and hydraulic system increases the compliance of whole system；The film epitheca of use Constraint support improves the crooking ability and handling capacity of whole delivery apparatus；The connected mode of bounce-proof device and support, makes It is slow in release process to obtain support, stability is high；Whole device pliability is high, smooth can not only pass through curved blood vessel, additionally it is possible to Damage to blood vessel is preferably minimized.
It is thin by the multi-pass operation of hydraulic system the invention provides a kind of delivery system for expandable stent Film epitheca is withdrawn, and during film epitheca is withdrawn, bounce-proof device can ensure that support is able to slowly in automatic expansion Release and effective spring forward prevented after support constraint releasing, so as to which off-position is accurate, hydraulic system increase whole system Compliance so that film epitheca is withdrawn until during support release, and whole device stability is high, and any shifting will not occur It is dynamic, ensure to be accurately positioned；In addition, by elastic parts with sliding being slidably matched for bulge loop so as to branch when film epitheca is withdrawn Certain cushioning effect is played in frame expansion, prevents deformation of timbering, the present apparatus is simple in construction, and cost is low, makes beneficial to being widely applied With.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims (10)

  1. A kind of 1. delivery system for expandable stent, it is characterised in that including：
    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, 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 away from the outer of one end and the core component 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 provided with bullet formed with fixed bulge loop, the fixed bulge loop close to one end of the bounce-proof device on the outer surface of core component Property component, the free end of the elastic parts is provided with the slip bulge loop for being used 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 include 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 with the guidewire lumen respectively, and first transfusion is logical Road the first opening formed with insertion, the side wall of second infusion channel in the core component in the side wall of the core component On the second opening formed with 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 First opening, second opening and the piston bulge loop are arranged in the hydraulic tube, and described first is open, is described The first hydraulic pressure tube chamber, the 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 are set in the outside of the hydraulic system and its components, and outside the film The inner surface of sheath is provided with unidirectional position limiting structure to ensure that the spacing slip in outer surface of the film epitheca and 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 is withdrawn.
  2. 2. the delivery system according to claim 1 for expandable stent, it is characterised in that the bounce-proof device is adopted With two groups, and central axis of the bounce-proof device along the core component is arranged symmetrically described in two groups.
  3. 3. the delivery system according to claim 1 for expandable stent, 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. 4. the delivery system according to claim 1 for expandable stent, it is characterised in that the seal wire of the core component The outer surface of output end is arranged to cambered surface.
  5. 5. the delivery system according to claim 1 for expandable stent, it is characterised in that the appearance of the core component Face is provided with the bar-shaped trough for being used for placing the bounce-proof device.
  6. 6. the delivery system according to claim 1 for expandable stent, 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. 7. the delivery system according to claim 1 for expandable stent, it is characterised in that first opening is circle Shape through hole.
  8. 8. the delivery system according to claim 1 for expandable stent, it is characterised in that the bounce-proof device Bending end is circular arc bending structure.
  9. 9. the delivery system according to claim 1 for expandable stent, it is characterised in that the bounce-proof device is adopted With Nitinol material.
  10. 10. the delivery system according to claim 1 for expandable stent, it is characterised in that the fixed bulge loop with The external diameter of the slip bulge loop is identical.
CN201710062864.XA 2017-01-24 2017-01-24 Delivery system for expandable stent Expired - Fee Related CN106580531B (en)

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US10792151B2 (en) * 2017-05-11 2020-10-06 Twelve, Inc. Delivery systems for delivering prosthetic heart valve devices and associated methods
CN109771111B (en) * 2019-01-24 2020-08-07 南华大学 Push system of self-expansion support
CN215960481U (en) * 2019-10-31 2022-03-08 杭州启明医疗器械股份有限公司 Linkage type interventional instrument conveying system
CN114748118B (en) * 2022-06-15 2022-09-13 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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US6113608A (en) * 1998-11-20 2000-09-05 Scimed Life Systems, Inc. Stent delivery device
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JP5230602B2 (en) * 2006-04-17 2013-07-10 タイコ ヘルスケア グループ リミテッド パートナーシップ System and method for mechanically positioning an endovascular implant
US20130226278A1 (en) * 2012-02-23 2013-08-29 Tyco Healthcare Group Lp Methods and apparatus for luminal stenting
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CN109938878B (en) * 2013-02-04 2021-08-31 托尔福公司 Hydraulic delivery systems for prosthetic heart valve devices and related methods
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