CN208905717U - Self-expansion type braided support and its conveying device - Google Patents

Abstract

The utility model relates to a kind of self-expansion type braided support and its conveying devices.Specifically, the utility model provides a kind of self-expansion type braided support, the length before the bracket release is 1.82-2.22 times of length after bracket release；The axial cripetura rate of the bracket is 45-55%；The angle of weave of the bracket is 90-140 °.The utility model provides a kind of for conveying the conveying device of the bracket simultaneously.The self-expansion type braided support of the utility model avoids bracket from design angle and is elongated release, bracket stent pushing pipe during release is mobile to distal end, to compensate for the axial cripetura amount after bracket release, vascular patency after improving Weaving type stenter to implant, to improve the therapeutic effect of bracket.

Description

Self-expansion type braided support and its conveying device

Technical field

The utility model belongs to medical instruments field, and specifically, the utility model relates to a kind of self-expansion type braided supports And its conveying device.

Background technique

Vascular diseases, Chinese medicine are referred to as vascular disease, and disease incidence has obvious rising in recent years, common such as arteriarctia Lesion, arteriovenous thrombosis, aneurysm etc..Peripheral arterial stenosis occlusion venereal disease becomes, and is common in atherosclerosis, glycosuria Disease, aorto-arteritis etc. are mainly shown as skin temperature reduction, muscular atrophy, touch less than pulse or pulse weakened, intermittent lame Row occurs distal limb necrosis, or even needs amputation when serious, threat to life when serious；Venous Thrombosis can cause suffering limb Blood stream stasis, swelling, while the risk for thering is Fatal pulmonary embolism to occur；Aneurism disease has knurl rupture big out at any time Blood, dead risk.Vascular diseases have very high disability rate and certain lethality, medical treatment to have little effect, operative treatment For invasive treatment method, and effect is limited.

According to the peripheral arterial disease intravascular intervention of United States cardiovascular radiographies in 2014 and intervention association (SCAI) publication Treatment common recognition statement, almost all of master-common iliac artery peripheral arterial disease (PAD) can use intravascular Interventional Treatment, but Evidence show a certain brackets to be better than other kinds of bracket.For TASC (TransAtlantic Inter- The general Atlantic Ocean cooperative groups of Society Consensus) it is classified as A, B, C grades of master-common iliac artery PAD, intravascular Interventional Treatment is excellent In Intimectomy, evidence shows that the former has more advantage (endarterectomy Death in terms of reducing mortality Rate 2.7%).Due to operation risk problem, open operative treatment is the last selection of such disease；Intravascular Interventional Treatment Success rate is more than 90%, and the death rate is low, is to change lifestyles and move not the Suitable therapeutic plan that can be effectively controlled patient with sympotoms Slightly.

The classification standard of intravascular stent has very much, can be divided into balloon-expandable and self-expansion type branch with bracket delivery mode Frame is divided into bare bracket, coating stent of medicine and overlay film frame with cradling function.It is divided into tubular bracket, cyclic annular branch with supporting structure Frame, winding bracket and braided support.Timbering material includes stainless steel, NiTi and cochrome bracket.

Balloon expandable stent itself is nonelastic, and design is that bracket is mounted on sacculus in advance, by foley's tube that bracket is defeated It send to vascular lesion, is attached at vascular wall by vascular wall retraction force after balloon expandable to certain diameter, vascular wall is not produced Raw prolonged expansion tension.Great advantage is release registration, is suitable for opening lesion, such as vertebral artery opening, arteria renalis opening Lesion.Additionally have the characteristics that after release that axial cripetura phenomenon is unobvious, radial support power is better than self-expandable stent.But sacculus Expandable stent itself easily occurs collapsing occlusion after lacking flexibility, being pressurized, and flexibility is not good enough, is poorly suited for cranium arteria carotis externa, stock Popliteal artery etc. is vulnerable to pressure or turning joint position.It is suitable for the limitation of more straight, inactive joint area out of shape in peripheral blood vessel Short section stenosis occlusion lesion (< 4cm).

Self-expanding stent removes release branch by the way that bracket is compressed in delivery sheath and is transported at vascular lesion outside sheath Frame relies on and obtains equilibrium relation between bracket itself expansion tension and the elasticity limitation of vascular wall to attach vascular wall.But from Expanding stent disadvantage includes: that bracket discharges Shi Youqian to jump and axial cripetura phenomenon, and it is difficult to be accurately positioned release；Bracket is from sheath Axial length after discharging in pipe can be remarkably decreased, stent length obviously axial cripetura, and bracket can be with releasing during release It puts row into and proximally shifts, need patient artificially to adjust the position of transportation system in the course of surgery, cause in surgical procedure Patient can not accurately control the positioning of bracket, and bracket is in the presence of proximally and distally location difficulty, releasing position are not satisfactory；Bracket Flexibility and counter-bending kinking performance can not adapt to completely this blood vessel by human body continuous mechanical movement for a long time answering for generating Miscellaneous stress easily occurs stress fatigue after being chronically implanted and bracket fracture occurs, blood vessel is caused restenosis symptom occur.Blood vessel is at a specified future date Patency rate decline.Thus such bracket is barely satisfactory always for the treatment of vascular lesion.

For this purpose, this field has needed to develop a kind of endovascular stent and its conveying device, bracket answer it is with good performance, And conveying device can make bracket accurate and quickly discharge into target lesion blood vessel.

Utility model content

The purpose of the utility model is to provide one kind can be realized intravascular accurate release, avoids by excessive elongation/compression Release improves vascular patency, and accurate positioning, easy to operate self-expansion type braided support and its conveying device.

The utility model in a first aspect, provide a kind of self-expansion type braided support, the length before the bracket release is 1.82-2.22 times of length after bracket release；The axial cripetura rate of the bracket is 45-55%；The angle of weave of the bracket It is 90-140 °.

In another preferred example, the length before the bracket release is 1.85-2.1 times of length after bracket release, preferably 1.9-1.95 times.

In another preferred example, the axial cripetura rate of the bracket is 46-52%, preferred 47-49%.

In another preferred example, the angle of weave of the bracket is 110-135 °, preferably 115-125 °.

In another preferred example, it is 1.6-2.13mm that the bracket, which loads compressed outer diameter,.

In another preferred example, it is 1.7-2.0mm, preferably 1.75-1.9mm that the bracket, which loads compressed outer diameter,.

In another preferred example, the string diameter of the bracket is 0.1-0.2mm.

In another preferred example, the diameter of the bracket is 4-8mm.

In another preferred example, the diameter of the bracket is 4.5-7.0mm.

In another preferred example, the braiding head number of the bracket is 4-8 head.

The second aspect of the utility model provides a kind of stent conveying device, and the conveying device includes: (a) this reality The self-expansion type braided support provided with novel first aspect；(b) transfer unit.

In another preferred example, the transfer unit include inner tube, stent pushing pipe, bracket constraint pipe, handle casing, Driving device connector, female Luer, bracket fetter pipe fitting, stent pushing tube drive device, transmission device.

In another preferred example, the outer diameter of the bracket constraint pipe is 2.0-2.33mm.

In another preferred example, the internal diameter of bracket constraint pipe is 1.6-2.13mm.

In another preferred example, the stent pushing tube drive device includes that the hardness connecting with stent pushing pipe pushes away Pipe, and the driving handle connecting with the hardness push pipe are sent, the distal end of the hardness push pipe is close with the stent pushing pipe End connection, the driving device connector are fixed on the hardness push tube outer surface.

In another preferred example, the hardness push pipe distal end is placed in the bracket constraint pipe.

In another preferred example, it shows, is used for scale on the driving handle being connect with the hardness push pipe The display hardness push pipe distance mobile to distal end.

In another preferred example, the distance between the hardness push pipe proximal end and bracket constraint pipe proximal end is are loaded certainly 2-2.5 times of expansion type braided support nominal length.

In another preferred example, in the inner tube be arranged developing ring mark, be used to indicate bracket release after proximal end and Remote location.

In another preferred example, the driving device connector and bracket constraint pipe fitting are along hard slide bar progress phase To movement.

In another preferred example, the transmission device is made of conveyer belt and fixed pulley.

In another preferred example, the bracket constraint pipe is for fettering the bracket loaded, and the transmission device is by conveyer belt It is formed with the fixed pulley, the conveyer belt passes through the fixed pulley, and described conveyer belt one end and the bracket fetter the outer of pipe Surface fetters pipe fitting by the bracket and is attached, and the bracket constraint pipe fitting is fixed on the close of the bracket constraint pipe Hold outer surface, the proximal end of the stent pushing pipe connects the stent pushing tube drive device, the other end of the conveyer belt and The stent pushing tube drive device (8) is attached by the driving device connector.

In another preferred example, the transmission device is made of gear and rack gear.

In another preferred example, the bracket constraint pipe is for fettering the bracket loaded, and the transmission device is by two phases It is formed to rack gear S1, S2 and gear S3 of movement, the rack gear S2 fetters pipe fitting and bracket by conveyer belt and the bracket Pipe connection is fettered, the rack gear S1 is connected by hardness push pipe with stent pushing pipe, by the gear S3 clockwise movement, Drive rack S1 and S2 are moved toward one another, and the bracket constraint pipe fitting is fixed on the proximal end outer surface of the bracket constraint pipe, The proximal end of the stent pushing pipe connects the stent pushing tube drive device.

In another preferred example, the stent pushing pipe that the transmission device formed with the gear and the rack gear is used cooperatively Driving device is driven using gun-type handle, and the gun-type handle and the gear and the rack gear form a separate type Handle.

In another preferred example, the bracket constraint pipe is joined by the rigid connection part of buckle and the gun-type handle It connects, when the rigid connection part is mobile to distal end, drives the bracket to fetter pipe mobile to distal end；And the stent pushing pipe is same Sample is coupled by the buckle with the rigid connection part of the gun-type handle, when the rigid connection part moves to the near end, The stent pushing pipe is driven to move to the near end, and the rigid connection part is moved toward one another by the realization of gun-type handle, to drive It moves the bracket constraint pipe and the holding of stent pushing pipe moves toward one another.

In another preferred example, the buckle is made of positioning chuck and positioning cards, and the positioning chuck is fixed on institute Bracket constraint pipe surface is stated, the positioning cards are fixed on the rigid connection part.

In another preferred example, the buckle is made of positioning chuck and positioning cards, and the positioning chuck is fixed on institute Stent pushing pipe surface is stated, and positioning cards are fixed on rigid connection part.

In another preferred example, the rigid connection part is connect with rack gear S2, and rigid connection part is connect with rack gear S1. Lever drive gear S3 does clockwise movement.

It should be understood that in the scope of the utility model, above-mentioned each technical characteristic of the utility model and (strictly according to the facts below Apply example) in specifically describe each technical characteristic between can be combined with each other, to form a new or preferred technical solution.Limit In length, not repeated them here.

Detailed description of the invention

Fig. 1 is angle of weave schematic diagram in the utility model one embodiment.

Fig. 2 is braided support nominal length and laden bracket front view in the utility model one embodiment.

Fig. 3 is fixed pulley transmission device schematic diagram in the utility model one embodiment.

Fig. 4 is the utility model one embodiment middle gear rack gear schematic diagram.

Fig. 5 is gun-type handle sectional view in the utility model one embodiment.

Fig. 6 is to buckle schematic diagram in the utility model one embodiment.

Wherein, number A1 represents angle of weave, and L represents bracket nominal length, and D represents bracket nominal diameter, and D1 represents branch Diameter after rack-mounted load；L1 represents length after bracket loads.1 represents inner tube, and 2 represent stent pushing pipe, and 3, which represent bracket constraint, manages, and 4 Represent handle casing, 5 represent driving device connector, 6 represent female Luer, 7 represent bracket constraint pipe fitting, 8, which represent bracket, pushes away Tube drive device is sent, 9 represent conveyer belt, and 10 represent fixed pulley, and 11 and 12 represent rigid connection part, and 13 and 14 represent gun-type hand Handle, 15 represent buckle, and 151 represent positioning cards, and 152 represent positioning chuck.

Specific embodiment

The utility model by extensively and in-depth study, developing a kind of self-expansion type braided support and its defeated for the first time Device is sent, the length before the bracket release is 1.82-2.22 times of length after bracket release；The axial cripetura of the bracket Rate is 45-55%；The angle of weave of the bracket is 90-140 °.The utility model develops self-expansion type braided support and its defeated The accurate release for sending device to can be realized bracket avoids the elongation release of bracket, hence it is evident that the blood vessel after improving stenter to implant Patency rate, and accurate positioning, it is easy to operate.Based on above-mentioned discovery, inventor completes the utility model.

Term

As used herein, term " nominal length " refers to the length after bracket release, and as bracket is fettered from bracket and managed Axial length after middle disengaging.

As used herein, term " diameter of bracket " refers to the outer diameter of bracket.

As used herein, term " string diameter of bracket " refers to the diameter of scaffolding thread.

As used herein, term " bracket loads compressed outer diameter " refers to that bracket loading is compressed in inside transportation system Bracket outer diameter.

As used herein, the axial direction that term " length before bracket release " refers to that bracket is loaded in bracket constraint pipe is long Degree.

As used herein, after term " length after bracket release " refers to that bracket releases inside transportation system Axial length.

As used herein, term " axial cripetura rate " refers to after discharging for the length before bracket release with bracket in length Percentage variation.

Self-expansion type braided support

The utility model provides a kind of self-expansion type braided support, and the length before the bracket release is length after bracket release 1.82-2.22 times of degree；The axial cripetura rate of the bracket is 45-55%；The angle of weave of the bracket is 90-140.

The axial direction cripetura rate refers to that the length before discharging for bracket changes with the percentage in length after bracket release.

In another preferred example, the length before the bracket release is 1.85-2.1 times of length after bracket release, preferably 1.9-1.95 times.

In another preferred example, the axial cripetura rate of the bracket is 46-52%, preferred 47-49%.

In another preferred example, the angle of weave of the bracket is 110-135 °, preferably 115-125 °.

When the angle of weave A1 is defined as bracket and is in nominal diameter D, scaffolding thread intersects in the axial direction to be formed by Angle A 1, as shown in Figure 1, the nominal diameter be diameter of the bracket under nominal length, i.e., bracket release after diameter.

By the experiment and research repeatedly of inventor, find the angle of weave A1 of self-expansion type braided support in 90- 140 °, bracket has preferable radial support power and flexibility and lower axial cripetura rate, and angle of weave A1 is bigger, branch Support force and flexibility are better, but the axial cripetura rate of bracket is bigger, is less susceptible to convey.Further, inventor is by multiple Experimental study discovery, when the angle of weave A1 of bracket is in 110-135 °, support force, flexibility and the axial cripetura of bracket Rate has reached an ideal balance.Further, when the angle of weave A1 of bracket is in 115-125 DEG C, bracket has Good support force and flexibility, and suitable axial cripetura rate.At this time the axial cripetura rate of bracket between 47%-49% it Between.Length before bracket release at this time is between 1.90-1.95 times of length after bracket discharges.As shown in Figure 2.

In the utility model, the length before the bracket release is 1.82-2.22 times of length after bracket release, preferably 1.85-2.1 times, more preferable 1.9-1.95 times, it can be avoided bracket and discharged by axial elongation.The self-expansion type of the utility model is compiled It knits bracket and is compressed by light axial and discharged, overcome during operation discharges bracket, since patient may be proximally slight Movement conveying system, the problem of causing bracket to be axially slightly elongated extension.And existing clinical experimental study discovery, bracket quilt After axial elongation, the patency rate that will lead to lesion vessels is remarkably decreased.Therefore the self-expansion type braided support energy of the utility model Enough compensating bracket in surgical procedure may be discharged by slight elongation.

In the preferred embodiment of the utility model, inventor loads compression to the bracket of self-expansion type braided support respectively The features such as the string diameter of outer diameter, bracket, the diameter of bracket and braiding head number afterwards carry out preferred design, specific as follows:

In a preferred embodiment, the intravascular stent loads compressed outer diameter and has to the passability of bracket and conveying device Large effect.The compressed outer diameter of bracket loading is smaller, and the bracket for loading bracket fetters pipe diameter can be smaller, bracket It is better with the passability of transportation system in the blood vessels.But intravascular stent loads the compressed smaller bracket that also increases of outer diameter from branch The difficulty discharged in frame constraint pipe, the release force that bracket is pushed from bracket constraint pipe can dramatically increase, the utility model Compressed outer diameter is reprinted to bracket and carries out screening and optimizing, selecting bracket to reprint compressed outer diameter is 1.6-2.13mm, preferably For 1.7-2.0mm, more preferably 1.75-1.9mm.

In a preferred embodiment, the string diameter of the bracket has a significant impact bracket support force, and the string diameter of bracket is bigger, branch The support force of frame almost rises at square grade, but the string diameter of biggish bracket also will affect blood vessel and wrap up the endotheliosis of bracket Bracket effect.In the utility model, by experimental design and preferred research, the string diameter 0.1-0.2mm of the bracket, it can be ensured that There is bracket good support performance and bracket can be completed in a relatively short time endothelialization.

In a preferred embodiment, the diameter of the bracket is 4-8mm.It is narrow for treating periphery lower limb in the utility model In lesion embodiment, the self-expansion type braided support that the diameter for bracket is 4-8mm has to the good support performance of blood vessel, It is able to maintain effective support to stenotic plaque, and bracket has lower force radially, avoids bracket to vascular tissue Generating stimulation leads to blood vessel endothelium hyperplasia, while bracket also has good flexibility and buckle resistance energy in the blood vessel, It can adapt to the distorted configurations and complicated force environment of blood vessel, it is ensured that support force quickly can be conveyed and be discharged, and be had Lower axial direction cripetura rate.In another preference of the utility model, the diameter of the bracket of the Zhi Suoshu is 4.5- 7.0mm。

In another preferred example, the Stent head number is defined as the mesh quantity of bracket circumferencial direction, in bracket In the case that diameter determines, the braiding head number of braided support determines the size of Stent mesh area, and then affects branch The metal covering area of frame in the blood vessel.Braiding head number is more, and the mesh area of bracket is smaller, and the metal of bracket in the blood vessel covers Capping product can significantly increase, this can seriously affect bracket by the endothelialization process of endothelial cell package covering, in the utility model, By our experimental design with preferably, the braiding head number of the bracket is 4-8 head.Bracket has more suitable mesh at this time Area, while the metal covering area of bracket is between 16-27%.

The conveying device of self-expansion type braided support

The utility model provides a kind of conveying device, and the conveying device includes:

(a) self-expansion type braided support；

(b) transfer unit.

In one preferred embodiment of the utility model, the transfer unit includes inner tube 1, stent pushing pipe 2, bracket It fetters pipe 3, handle casing 4, driving device connector 5, female Luer 6, bracket and fetters pipe fitting 7, stent pushing tube drive device 8, transmission device；

Through experimental study, it is preferred for loading outer diameter of the bracket constraint pipe 3 with 6-7F of compressed stent, i.e. bracket The outer diameter of pipe is fettered between 2.0-2.33mm.

In another preferred example, the internal diameter of bracket constraint pipe 3 is 1.6-2.13mm.Inventor sends out after study It is existing, in a certain range, bracket load compressed outer diameter the axial cripetura rate of bracket is influenced it is smaller, since bracket loads The angle of weave being compressed in bracket constraint pipe is smaller, and slight variation occurs for angle of weave compressed to bracket loading at this time Outer diameter is affected, but influences on the axial cripetura rate of bracket smaller.Therefore, bracket is loaded in the bracket of internal diameter 1.6-2.13mm There is approximate axial cripetura rate in constraint pipe.

In another preferred example, the stent pushing tube drive device 8 includes a hardness connecting with stent pushing pipe 2 Push pipe, and the driving handle being connect with the hardness push pipe, the distal end of the hardness push pipe and the stent pushing pipe 2 Proximal end connection, the driving device connector 5 are fixed on the hardness push tube outer surface.It is preferred that the hardness push pipe distal end is set In bracket constraint pipe 3.In another preferred example, between the hardness push pipe proximal end and bracket constraint 3 proximal end of pipe Distance by 2-2.5 times of loading self-expansion type braided support nominal length.Bracket discharge when, it is described hardness push pipe distal end to Distal end moves into the bracket constraint pipe 3, and the bracket constraint 3 proximal end of pipe moves to the near end, and making bracket, compensation is released in situ It is placed at target lesion vessel position.

In another preferred example, it shows, is used for scale on the driving handle being connect with the hardness push pipe The display hardness push pipe distance mobile to distal end.The length of bracket release is observed convenient for patient.

In another preferred example, in the inner tube 1 be arranged developing ring mark, be used to indicate bracket release after proximal end and Remote location.

In another preferred example, the driving device connector 5 and bracket constraint pipe fitting 7 are carried out along hard slide bar It moves toward one another.

In another preferred example, the transmission device is made of conveyer belt 9 and fixed pulley 10.

In another preferred example, the bracket constraint pipe 3 is used to fetter the bracket loaded, and the transmission device is by conveyer belt 9 and the fixed pulley 10 form, the conveyer belt 9 pass through the fixed pulley 10, described 9 one end of conveyer belt and the bracket constraint The outer surface of pipe 3 fetters pipe fitting 7 by the bracket and is attached, and the bracket constraint pipe fitting 7 is fixed on the bracket The proximal end outer surface of pipe 3 is fettered, the proximal end of the stent pushing pipe 2 connects the stent pushing tube drive device 8, the transmission It is attached with 9 other end and the stent pushing tube drive device 8 by the driving device connector 5.As shown in Figure 3. In the utility model preference, the conveyer belt 9 passes through the fixed pulley 10, is in tension state, and the stent pushing pipe drives Dynamic device 8 drives the stent pushing pipe 2 mobile to distal end, since bracket constraint pipe 3 passes through the transmission belt 9 and described Fixed pulley is connect with the stent pushing pipe 2, and the stent pushing tube drive device 8 is also synchronous at this time drives the bracket constraint Pipe 3 proximally moves towards, i.e., the described bracket constraint pipe 3 and the stent pushing pipe 2 keep identical rate travel to do phase To movement.

In another preferred example, the transmission device is removed is realized in opposite directions using the transmission device that conveyer belt and fixed pulley combine Movement is outer, and the transmission device is made of gear and rack gear.As shown in Figure 4.

In another preferred example, the bracket constraint pipe 3 is used to fetter the bracket loaded, and the transmission device is by two phases It is formed to rack gear S1, S2 and gear S3 of movement, the rack gear S2 fetters pipe fitting 7 and bracket by conveyer belt and the bracket It fetters pipe 3 to connect, the rack gear S1 is connected by hardness push pipe and stent pushing pipe 2, is transported clockwise by the gear S3 Dynamic, drive rack S1 and S2 are moved toward one another, and the bracket constraint pipe fitting 7 is fixed on outside the proximal end of the bracket constraint pipe 3 The proximal end on surface, the stent pushing pipe 2 connects the stent pushing tube drive device 8.

In another preferred example, the stent pushing pipe that the transmission device formed with the gear and the rack gear is used cooperatively Driving device 8 is driven using gun-type handle, and the gun-type handle and the gear and the rack gear form a separate type Handle.The separate-type handle can just carry out assembling use with stent conveying device in the course of surgery, without carrying out preoperative packet Dress uses.

In another preferred example, the rigid connection part 11 that the bracket constraint pipe 3 passes through buckle 15 and the gun-type handle Coupled, when the rigid connection part 11 is mobile to distal end, drives the bracket to fetter pipe 3 mobile to distal end；And the branch Frame push pipe 2 is equally coupled by the buckle 15 with the rigid connection part 12 of the gun-type handle, the rigid connection When part 12 moves to the near end, the stent pushing pipe 2 is driven to move to the near end, and the rigid connection part 11,12 passes through gun-type The realization of handle 13,14 moves toward one another, so that the bracket constraint pipe 3 and the holding of stent pushing pipe 2 be driven to move toward one another.Such as Fig. 5 It is shown.

Further, handle and bracket constraint pipe, stent pushing pipe can assemble use in the preoperative.As shown in Fig. 6, In another preference, the buckle 15 is made of positioning chuck 152 and positioning cards 151, and the positioning chuck 152 is fixed on institute Bracket constraint 3 surface of pipe is stated, the positioning cards 151 are fixed on the rigid connection part 11.It is preoperative to block positioning cards 151 In the interannular gap of positioning chuck 152, the rigid connection part 11 as described in the handle drives can be realized, drive the bracket Constraint pipe 3 is moved.

In another preferred example, the buckle 15 is made of positioning chuck 152 and positioning cards 151, the positioning chuck 152 are fixed on 2 surface of stent pushing pipe, and positioning cards 151 are fixed on rigid connection part 12.It is preoperative by positioning cards 151 are stuck in the interannular gap of positioning chuck 152, and the rigid connection part 12 as described in the handle drives can be realized, and drive institute Stent pushing pipe 2 is stated to be moved.

In another preferred example, the rigid connection part 11 is connect with rack gear S2, and rigid connection part 12 and rack gear S1 connect It connects.Handle 13,14 drives gear S3 to do clockwise movement.

The important technical advantage of the utility model

(1) the utility model realizes the accurate release of bracket, avoids bracket and is excessively drawn in operation implantation process Length/compression release, hence it is evident that the vascular patency after improving stenter to implant.

(2) in addition, the technical program efficiently solves the mount proximal end positioning of current vascular surgery clinician complaint not Clear problem, in the reciprocating design of the prior art, bracket is by toward extrapolated, the elongation or compression of bracket depend on doctor paragraph by paragraph Raw scene operates at once, leads to the releasing position that mount proximal end can not be determined in doctor's art.And if the proximal end distance of bracket When vascular bifurcation is closer, it is likely that blocking bifurcated vessels, the common practice of doctor is control after the bracket release selected at present Mount proximal end after release has a certain distance as buffering apart from bifurcated vessels.But the number of buffer distance is unable to control.Such as Lesion cannot be completely covered apart from excessive apart from bifurcated vessels after bracket release, then need to supplement in proximal end and place one piece of short branch Frame.The treatment cost of patient is caused to rise.And the utility model then efficiently solves the problems, such as this.In the utility model, bracket is released Length after putting is close to the half before bracket release, and the releasing position of mount proximal end can carry out observation before bracket release and sentence Disconnected, the releasing position of mount proximal end is usually identified by the way that developing mark is arranged in interior pipe surface, and in the utility model, interior Pipe is fixed in position during bracket discharges, and is facilitated doctor and judge the proximal location after bracket discharges, and the prior art In reciprocating release during, indicate mount proximal end releasing position developing mark bracket discharge during back and forth moved Dynamic, patient can only judge the expection proximal location of bracket before bracket discharges, and during bracket release, due to inner tube/outside Pipe moves back and forth, can not be in art with reference to the proximal end releasing position for judging bracket.

(3) using push release bracket, the troublesome operation of reciprocating release is avoided, in surgical procedure, bracket discharged Journey is consistent with existing common NiTi cutting support release process, and patient is without relearning release operation；And in the prior art Reciprocating release need patient voluntarily control bracket release compensation rate, need very brilliant release skill, thus learning curve It is longer.

The present invention will be further illustrated below in conjunction with specific embodiments.It should be understood that these embodiments are merely to illustrate this Utility model rather than limitation the scope of the utility model.In the following examples, the experimental methods for specific conditions are not specified, leads to Often according to normal conditions, or according to the normal condition proposed by manufacturer.

Embodiment 1

In the present embodiment, bracket is woven using 0.15mm titanium-nickel wire, diameter 4.5mm, Stent head number 4, braid angle Spending A1 is 120 °, and bracket loading is compressed in bracket constraint pipe, and the bracket released from bracket constraint pipe is axially short Shrinkage is 47.6%, and the internal diameter of the pipe of bracket constraint at this time is about 1.75mm.In the present embodiment, controlled using fixed pulley transmission device Bracket constraint pipe 3 and stent pushing pipe 2 are moved toward one another.Transmission device is made of conveyer belt 9 and fixed pulley 10, conveyer belt one End and the outer surface of bracket constraint pipe 3 fetter pipe fitting 7 by bracket and are attached, and bracket constraint pipe fitting 7 is fixed on bracket The proximal end outer surface of pipe 3 is fettered, the proximal end of stent pushing pipe 2 connects a driving device 8, and the other end and bracket of conveyer belt 9 push away Tube drive device 8 is sent to be attached by a driving device connector 5.Conveyer belt 9 passes through fixed pulley 10, tightens shape in tension State.8 driving arm of driving device pushes pipe 2 to distal end movement, since bracket constraint pipe 3 passes through transmission belt 9 and fixed pulley and branch Frame pushes pipe 2 and connects, and driving device 8 also synchronizes driving arm constraint pipe 3 and proximally moves towards at this time.That is bracket constraint pipe 3 and stent pushing pipe 2 keep identical rate travel to move toward one another.Meanwhile driving device 8 includes one and stent pushing pipe The hardness push pipe of connection, and the driving handle being connect with hardness push pipe.The distal end of hardness push pipe is close with stent pushing pipe 2 End connection, driving device connector 5 are fixed on hardness push tube outer surface.It is preferred that hardness push pipe distal end is placed in bracket constraint pipe 3 In.The distance between hardness push pipe proximal end and bracket constraint 3 proximal end of pipe should be more than 2 times of loaded bracket nominal length.Branch When frame discharges, to distally moving into bracket constraint pipe 3, bracket constraint 3 proximal end of pipe is moved to the near end for hardness push pipe distal end, Making bracket, compensation discharges at target lesion vessel position in situ.

Embodiment 2

In the present embodiment, bracket is woven using 0.18mm titanium-nickel wire, diameter 7.0mm, Stent head number 6, braid angle Spending A1 is 118.5 °, and bracket loading is compressed in bracket constraint pipe, and the bracket released from bracket constraint pipe is axial Cripetura rate is 46.6%, and the internal diameter of the pipe of bracket constraint at this time is about 1.9mm.In the present embodiment, using rack-and-pinion transmission device Control bracket constraint pipe 3 and stent pushing pipe 2 are moved toward one another.Rack gear S1, S2 that transmission device is moved toward one another by two and Gear S3 composition, middle rack S2 fetter pipe fitting by conveyer belt and bracket and connect with bracket constraint pipe, and rack gear S1 passes through hard Property push pipe connected with stent pushing pipe.By loading rotating handle on gear S3, driving gear S3 is rotated clockwise, into And drive rack S1 and S2 are moved toward one another.

Embodiment 3

In the present embodiment, bracket is woven using 0.15mm titanium-nickel wire, diameter 6.0mm, Stent head number 6, braid angle Spending A1 is 119 °, and bracket loading is compressed in bracket constraint pipe, and the bracket released from bracket constraint pipe is axially short Shrinkage is 46.9%, and the internal diameter of the pipe of bracket constraint at this time is about 1.65mm.In the present embodiment, using the identical tooth of same embodiment 2 Wheel rack gear control bracket constraint pipe 3 and stent pushing pipe 2 are moved toward one another.Except that being divided using preoperative From gun-type lever drive gear S3 rotate clockwise.

Detailed process are as follows: bracket constraint pipe 3 is coupled by buckle 15 with the rigid connection part 11 of handle, rigid connection When part 11 is mobile to distal end (right end), bracket is driven to fetter pipe 3 mobile to distal end；And stent pushing pipe 2 equally by buckle with The rigid connection part 12 of handle is coupled, and rigid connection part 12 is when proximally (left end) is mobile, drive stent pushing pipe 2 to Proximal end is mobile.And rigid connection part 11 and 12 is moved toward one another by the realization of gun-type handle 13 and 14, thus driving arm constraint pipe 3 and stent pushing pipe 2 holding move toward one another.

Further, handle and bracket constraint pipe holder push pipe can assemble use in the preoperative.Buckle 15 is by 152 Hes 151 compositions, as shown in fig. 6,152 are fixed on bracket constraint 3 surface of pipe, and 151 are fixed on rigid connection part 11.It is preoperative to incite somebody to action 151 are stuck in 152 interannular gap, can be realized by handle drives rigid connection part 11, and bracket constraint pipe 3 is driven to be moved It is dynamic.

It similarly is fixed on 2 surface of stent pushing pipe by 152, and 151 are fixed on rigid connection part 12.It is preoperative by 151 It is stuck in 152 interannular gap, can be realized by handle drives rigid connection part 12, stent pushing pipe 2 is driven to be moved.

Wherein, rigid connection part 11 is connect with S2, and rigid connection part 12 is connect with S1.It is suitable that handle 13 and 14 drives S3 to do When needle movement.Driving process is the same as conventional gun-type movement mechanism.

1 year patency rate of braided support difference releasing effect is studied

Existing clinical effectiveness shows 1 year vascular patency of braided support difference releasing effect, is released using reciprocating It puts, only 36% bracket realizes bracket and discharges according to nominal length, and 50% bracket is elongated release, 14% bracket It is discharged by compression.The stented vessel patency rate for wherein elongating release has dropped at least 15%.Weaving type bracket is seriously affected Therapeutic effect.And the self-expansion type braided support of the utility model from design angle avoids bracket is excessively elongated or compressed and release It puts, bracket stent pushing pipe during release is mobile to distal end, to compensate for the axial cripetura amount after bracket release, improves The stented vessel patency rate of Weaving type bracket, to improve the therapeutic effect of bracket.

It is incorporated herein by reference in all documents that the utility model refers to, just as each document quilt It is individually recited as with reference to such.In addition, it should also be understood that, after having read the above-mentioned teaching content of the utility model, this field skill Art personnel can make various changes or modifications the utility model, and such equivalent forms equally fall within the application appended claims Book limited range.

Claims (10)

1. a kind of self-expansion type braided support, which is characterized in that

Length before the bracket release is 1.82-2.22 times of length after bracket release；The axial cripetura rate of the bracket is 45-55%；The angle of weave of the bracket is 90-140 °.

2. bracket as described in claim 1, which is characterized in that it is 1.6-2.13mm that the bracket, which loads compressed outer diameter,.

3. bracket as described in claim 1, which is characterized in that the string diameter of the bracket is 0.1-0.2mm.

4. bracket as described in claim 1, which is characterized in that the diameter of the bracket is 4-8mm.

5. bracket as described in claim 1, which is characterized in that the braiding head number of the bracket is 4-8 head.

6. a kind of stent conveying device, which is characterized in that the conveying device includes:

(a) self-expansion type braided support as described in claim 1；

(b) transfer unit.

7. conveying device as claimed in claim 6, which is characterized in that the transfer unit includes inner tube (1), stent pushing Manage (2), bracket constraint pipe (3), handle casing (4), driving device connector (5), female Luer (6), bracket constraint pipe fitting (7), stent pushing tube drive device (8), transmission device.

8. conveying device as claimed in claim 7, which is characterized in that the outer diameter of the bracket constraint pipe (3) is 2.0- 2.33mm。

9. conveying device as claimed in claim 7, which is characterized in that the stent pushing tube drive device (8) includes one The hardness push pipe being connect with stent pushing pipe (2), and the driving handle being connect with the hardness push pipe, the hardness push The distal end of pipe is connect with stent pushing pipe (2) proximal end, and it is outer that the driving device connector (5) is fixed on the hardness push pipe Surface.

10. conveying device as claimed in claim 9, which is characterized in that the hardness push pipe proximal end and bracket constraint pipe (3) The distance between proximal end by 2-2.5 times of loading self-expansion type braided support nominal length.