CN207871029U - A kind of valvular adjustable bending transport system of intervention - Google Patents

Abstract

The utility model discloses a kind of valvular adjustable bending transport systems of intervention, including outer sheath, be placed in the outer sheath can axially opposing sliding core-pipe subassembly and the operation handle that is connected with the outer sheath and core-pipe subassembly proximal end, the tube body of the outer sheath has proximally and distally, the handle is connected with the traction fiber for pulling body distal end bending, the distal end that traction fiber distal end connect with tube body and connects socket part position at or adjacent to tube body, at least one section of the traction fiber is the free section being free in outside tube body；It is additionally provided with floating position-limiting item, the proximal end of the floating position-limiting item is the initiating terminal being fixedly installed relative to gland or core-pipe subassembly, and floating position-limiting item floats between intervention heart valve installation position and outer sheath；The outer wall of the gland be equipped with for intervene the valvular matched positioning region of engaging lug, before the engaging lug is completely released out outer sheath, the floating position-limiting item is fettered the cooperation kept between engaging lug and positioning region by outer sheath.

Description

A kind of valvular adjustable bending transport system of intervention

Technical field

The utility model is related to medical instruments fields, more specifically, the utility model is related to a kind of by heart valve prosthesis It is implanted to the conveying device of heart.

Background technology

Heart valve disease is one of most common heart disease in China, wherein predominantly valve lesions caused by rheumatic fever； Recently as the development of aging of population, valve retrogression (including calcification and mucinous degeneration etc.) and dysbolism valve Membrane damage is also increasing in China；In addition, congenital valve disease is also one of cardiopathic common disease factor.Considerable heart For example serious valvular inadequacy of the high risk cases of valvular heart disease, advanced age are unsuitable for surgery heart valve replacement surgery, late tumor and valve is closed Infull patient etc. needs the interventional method treatment that new wound is small.It is in surgery cardiac valve replacement hand to intervene heart valve Develop under the inspiration of art, in recent years, percutaneous valve interventional procedure comes into being and sequential use takes with the mankind after 2000 Obtained success.Small-scale clinical parallel conceptual phase is developed to from experimental study, valvular heart disease is intervened on possible break-through skill " bottleneck " realizes rapidly extensive clinical application, becomes the focus in Interventional Cardiology field again.

In the prior art, it is conveyed into the human body by conveying device after prosthetic heart valve holder compression, the valve of compression Holder usually has elasticity, applies prodigious power to compression tube when being in compressive state, these excessive power are difficult to make valve Holder slowly accurately discharges, and often leads to the excessive friction of valve bracket and blood vessel.

The Chinese patent literature of Publication No. CN101953725 discloses a kind of prosthetic heart valve holder, by aorta Holder, valve bracket, efferent tract holder and engaging lug composition, when heart valve is compressed in conveying device, the engaging lug energy It is enough engaged in the holder fixation kit of conveying device, passes through the engaging of engaging lug and outer sheath during valve bracket discharges Collect complete valve bracket slow release.However, in the prior art engaging valve bracket engaging lug to collect power smaller, Valve bracket discharges the process later stage, and engaging lug is easily popped up from conveyor support fixation kit, and valve bracket is made to release completely It puts.At this point, if the problems such as finding deviations, just can not be recycled, can only pass through surgical replacement in time.

To overcome the valve bracket existing above problem, United States Patent (USP) US5683451 during implantation human body release public A kind of delivery apparatus and method of valve bracket control release are opened, the method by the way that track is arranged in conveying device is reduced Elastic dilatation frictional force caused by delivery conduit when conveying and discharging valve prosthesis, above-mentioned utility model reduce valve branch Friction between frame and delivery conduit.However, valve bracket during release due to elastic force is excessive suddenly discharge completely ask Topic can not still solve, and the valve bracket after release is in place cannot achieve the adjustment or secondary in place of position, so not only to operation When control accuracy requirement it is high, and there is also certain risks.

Moreover, the outer outer sheath of the valvular conveying of conveying intervention is currently used for mostly to be manufactured by high molecular material, Although the attribute performance of high molecular material is good, its elasticity and intensity are poor.Although reinforcement material is answered currently, also having and using For in high molecular material, such as woven network tube or elastic tube do and reinforce, by high molecular material coating reinforced pipe interior shape At outer outer sheath, still, above-mentioned measure only increases the fold resistance and pressure-bearing property of outer outer sheath, and apparent solution is outer When sheath withdraws intervention heart valve the intervention heart valve that encounters be difficult to recycle, outer sheath fold the problem of.

Based on the considerations of the full of twists and turns characteristic of human vasculature and remote-controlled operation, sheath should usually have enough Axial direction and radial support power and good compliance passed through the push of doctor, sheath itself before reaching diseased region The compliance having can make the distal end of sheath during advancing along guidewire track, adaptive adjustment bending direction with Comply with the train of thought of human body.Due to the influence of intravascular blood flow, sheath is advanced generally along vascular wall, and in early period, this is to sheath Travelling route have no too much influence, but in drug, instrument release, need the distal end of sheath to be directed at diseased region, show Right, the direction of the distal end of sheath must be adjusted and be controlled at this time, moves it to target location.

By taking cardiac valve replacement as an example, the heart valve of human body is located at the middle position of blood vessel, when needing to heart valve When film is replaced, the distal end of sheath need to reach the center of valve, then the cardiac valve replacement device of carrying is discharged, and make heart valve Displacement apparatus replaces the valve driving functions of itself, since sheath is advanced along vascular wall, close to disease site When, it is necessary to the direction for adjusting sheath distal end makes it be moved towards the center of valve, if the diameter of aorta petal is about 26mm, And at this diameter of blood vessel obviously be more than aorta petal diameter, and usually sheath distal end a diameter of 7mm or so, then at least The distal end of sheath should be made to move 9mm or so in the diametric(al) of blood vessel.

A kind of solution be according to human vas distribution shape or organization of human body to the distal end of conduit carry out setting plus Work customizes conduit of different shapes to meet the need in the intravascular arrival diseased region of detour in conjunction with different shape, structures It asks.If United States Patent (USP) US2003144657 discloses a kind of conduit tube component, which uses outer with pre-forming distal Conduit and preformed inner catheter is carried, what the relative rotation and extension of inside and outside conduit provided conduit tube component distal tip can Shape is adjusted, to improve through the positioning of atrium dextrum and be inserted into coronary sinus with conduit.But this can not be with the physiology of individuation Anatomical structure is adapted one by one, it is easy to influence surgical outcome.

Currently, the solution of generally use is the sheath with distal end adjustable bending, it is typically to have one or more traction Silk (also having title bracing wire), the distal end of sheath is fixed in distal end, and prolongs always in tube wall and extend to sheath proximal end, close with sheath Regulating mechanism on the handle of end is connected, which can slide in conduit, to allow the change conduit curvature of doctor's active, Sheath distal end is bent, its turning is guided to advance to target site.

It being used for interventional treatment head controllable bending as the Chinese patent literature of Publication No. CN102921089A discloses one kind Bent conduit, multi-cavity catheter head are connected with the soft head of main pipe, and the tail portion of multi-cavity catheter is connect by connector with extension tube, extend Pipe is externally provided with handle, and handle carriage, carriage and extension tube extrusion fit are connected in handle, carriage Upper and lower ends extend to outside the shell of handle, and the both sides up and down of carriage are connected separately with a traction fiber, traction fiber it is another One end auxiliary chamber of homonymy on multi-cavity catheter and the soft head of main pipe is fixedly connected on the head of the soft head of main pipe, and extension tube is another End extends to outside handle, is connected with connector.After conduit enters in vivo, according to blood vessel or the structure of region of interest, pass through hand Handle controls traction fiber, and traction fiber is in the soft head of main pipe for being pulled distal end of catheter by the tractive force of handle carriage, main pipe The pulling force that soft head is pulled silk is back bent, to realize the adjusting in direction.

Even if in the prior art using traction fiber, especially traction fiber is all connecting on the whole and is being bound in residing pipeline Or in channel, therefore curved or sheath distal end envelope intervention heart valve is longer, under the situations such as harder needing significantly to adjust, It is difficult to meet and adjust the needs of curved, and due to being limited by peripheral part deformation quantity residing for torque size and traction fiber when adjusting curved System, when operation, are more laborious.

Utility model content

The utility model provides a kind of valvular adjustable bending transport system of intervention, can be released in intervention heart valve Fastening valve bracket finally discharges end during putting, and prevents intervention heart valve before confirming release or need to further withdraw tune Installation position is popped out during whole release, when intervening heart valve recycling, outer sheath can provide stable axial support and Expansionary force and steady and easy resetting intervention heart valve can.Further also improve outer sheath distal end bending direction Controllability, can readily control the distal end of outer sheath and be bent to scheduled diseased region or mobile.

A kind of valvular adjustable bending transport system of intervention, including outer sheath, being placed in the outer sheath can axial phase Core-pipe subassembly to sliding and the operation handle being connected with the outer sheath and core-pipe subassembly proximal end, the tube body of the outer sheath With proximally and distally, the handle is connected with the traction fiber for pulling body distal end bending, traction fiber distal end connect with tube body and Socket part position is connected at or adjacent to the distal end of tube body, at least one section of the traction fiber is the free section being free in outside tube body；

Seeker and gland are fixed on the core-pipe subassembly, wherein seeker is fixed on core-pipe subassembly distal end, core pipe Gland is extended in component proximal lateral, is intervention heart valve installation position between seeker and gland；The outer sheath is in Intervene the periphery of heart valve installation position；

It is additionally provided with floating position-limiting item, the proximal end of the floating position-limiting item is to be fixedly installed relative to gland or core-pipe subassembly Initiating terminal, floating position-limiting item float between intervention heart valve installation position and outer sheath；

The outer wall of the gland be equipped with for intervene the valvular matched positioning region of engaging lug, the connection Before ear is completely released out outer sheath, the floating position-limiting item is fettered by outer sheath and is kept for matching between engaging lug and positioning region It closes.

In the utility model, the tube body of outer sheath has proximally and distally, and the body distal end is towed silk and pulls bending, One end of the traction fiber extends to the proximal end of tube body, the other end of the traction fiber and the connecting portion of tube body at or adjacent to The distal end of tube body, and at least one section of traction fiber is the free section being free in outside tube body.The distal end of the traction fiber is fixed simultaneously Extend tube body for being connected with operation handle in the proximal end of the distal end of the neighbouring tube body, the traction fiber.

Wire or macromolecular fibre etc. relatively thin and that meet intensity requirement can be used in traction fiber itself, with regard to itself material I.e. the prior art can be used in processing method.

Preferably, the free section of the traction fiber is located at the far-end of body distal end or neighbouring tube body.

Traction fiber is free on tube wall, and is connect with body distal end, and traction fiber directly controls tube body, more added with The transmission tractive force of effect.

Preferably, the free section of the traction fiber is located in the middle part of tube body to the distal end of body distal end or neighbouring tube body.

Free section is longer, can be reduced by the binding force of sheath, reduces the demand colleague to regulating force, reduces each force structure The pressure limit requirement of part, connector, tie point.

Preferably, the free section of the traction fiber is located at tube body proximal end to the distal end of body distal end or neighbouring tube body.

Completely self-contained traction fiber will not be influenced by tube body flexural deformation, directly to distally regulating and controlling.Tube body is defeated Send the bending in path.

Preferably, the free section of the traction fiber is located at tube body proximal end to the distal end of neighbouring tube body.

Different sheaths, distal structure is different, can be by the connection with bracing wire when distal structure is not suitable for loading bracing wire Point is moved to suitable position, then the drive distal end linked is mobile.

Traction fiber can be that traction fiber is connected to the end position of sheath or apart from end adjacent to the distal end of the tube body Position is less than 5cm.It is further preferably no larger than 3cm.Hypertelorism can influence drawing and adjust curved effect.

It is described it is free mainly compared with the prior art in for traction fiber extends in channel or cavity, free common side Formula is suspended in outside tube body, is at least had larger degree of freedom, can be detached from tube wall to a certain extent and be led with maintaining Draw the effect tightened.

It is free that traction fiber can also be limited to a certain extent, such as the distance for being detached from tube wall is limited, or The oblique angle etc. of opposite tube body axial direction.

It is valvular defeated that the utility model sheath can be used for intravascular stent, heart valve valve bracket or other interventions It send.

In order to improve safety, the outside of the free section is surrounded by anti-cutting protective layer.

The material of flexible relative may be used in anti-cutting protective layer, and in-vivo tissue is hurt when traction fiber being avoided to tighten.Anti-cutting is protected It can both be relatively fixed, can also slide between each other between sheath and traction fiber, the drawing of tube body will not at least be made At harmful effect.

In order to which the connection for improving traction fiber and tube body is firm, preferably, the end of the traction fiber carries a ring set, it should Ring set is around the home in the periphery of tube body.

Tube body is integrally pulled by ring set, avoids stress raisers.

Preferably, the ring set is fixed on the outer wall of tube body, or rotation is set on the outer wall of tube body and axial limiting.

The outer wall that ring set is fixed on tube body can be set in by the modes such as welding or fastening connection piece, rotation on tube body The position of adaptive impetus when being more convenient for adjusting curved.

As axial limiting, the outer wall of the tube body is equipped with axial limiting slot, and the ring set rotation is set in axial limiting In slot.

As axial limiting, the outer wall of the tube body is equipped with axial limiting part, and the both sides of the ring set axial direction are respectively by axis Blocking to locating part.

Preferably, the axial limiting part, which is blocking, hooks or connects ring.Limit ring set axial position, axial limiting number of packages Amount can there are one or it is multiple.

Preferably, the axial limiting part is to be in the limited step of tube wall, or the limit being fixed on tube body Ring.

The posture of sheath when being pulled for the ease of matching, it is two or more to select suitable impetus, the traction fiber.Example Such as 2,3,4.When especially traction fiber is fixed relative to tube body, if traction fiber or ring set can change the circumferential position of opposite tube body It sets, then when there is a traction fiber, can be adjusted by pulling, its adaptive impetus.

The connecting portion of each traction fiber and tube body is uniformly distributed around the circumferential direction of tube body.

Preferably, the ring set is fixed on the outer wall of tube body, ring set is uniformly distributed in the circumferential to be connected with 2~4 and leads Draw silk.

When ring set is fixedly connected with tube body, ring set can be fixed on tube wall or inside tube wall.

Preferably, the ring set is structure as a whole with traction fiber, is seperated and be fixedly connected or dismantling connection.

When being structure as a whole, i.e., traction fiber distal end itself coiling is annular, and seals fixation.

When non-integral structure, in order to improve intensity, ring set in the axial direction can be slightly wide with size, for example, ring set is in the axial direction Width be 1~5mm.Substantially flat strip shaped after expansion.

In order to further control the posture that sheath conveys in vivo to coordinate tune curved, preferably, in tube wall also It is fixed with reinforcing rib.

Channel is equipped in tube wall, reinforcing rib is along channel entire body until distal end, and vias inner walls and reinforcing rib are mutual It is fixed.

Preferably, reinforcing rib is two, the circumferentially-spaced distribution of the traction fiber and reinforcing rib in tube body.

More preferably traction fiber is two, and reinforcing rib is two, and two reinforcing ribs are in the axle center offside of the tube body, On the arbitrary section of tube body, the center angle of any one reinforcing rib and wherein one traction fiber is 30~150 °.

Preferably, the center angle of any one reinforcing rib and wherein one traction fiber is 80~100 °.

Preferably, each traction fiber, reinforcing rib are uniformly distributed in the circumferential direction of tube body.

Here wherein one section due to traction fiber is free, can be considered the interconnecting piece of tube body in the position of traction fiber Position.It can change since the connecting portion of traction fiber and tube body is likely to be, refer in particular to the interconnecting piece of traction fiber and tube body Position is fixed scene.

If the connecting portion of traction fiber and tube body is variable, such as ring set rotational installation etc., then in traction fiber When, the change impetus that traction fiber can be adaptive reaches best distracted position, implements to adjust curved.

Axle center offside i.e. two reinforcing rib that two reinforcing ribs are in the tube body is in the two opposite sides of the tube body, this Sample, sheath are not easy bending on two reinforcing ribs line direction radially, can only be in the perpendicular bisector side of two reinforcing rib lines To bending, when pulling traction fiber, the distal end of sheath is inevitable and easier curved towards most pliable direction (direction of traction fiber) It is bent.

Certainly, two reinforcing ribs also can not be positioned opposite.On the arbitrary section of tube body, the center angle of two reinforcing ribs Less than 180 °, traction fiber is in the side of arbitrary reinforcing rib and the line of tube body axis radially.In this way, sheath is reinforced at every Muscle should not be bent with the line direction of tube body axis radially, therefore, when traction fiber is arranged, traction fiber should be avoided to be distributed in Any one reinforcing rib and the line direction of tube body axis radially.

The distal end of the tube body is to intervene valvular expansion arc for accommodating.The connecting portion of certain traction fiber It is in the proximate distal ends of expansion arc.

For the ease of connecting and fettering traction fiber, traction fiber is outer other than free section, and non-free part can pass through guiding Component proximally extends.Guide member can additionally be arranged or utilize tube body itself.

The distal end of the tube body is to intervene valvular expansion arc for accommodating, and the traction fiber is connected to expansion arc Proximal lateral.

Intervene heart valve such as valve.

Traction fiber is development section at wherein one section of adjacent distal end part.

Development section can be in material containing can develop ingredient, or applied by embedded, outer, reached in the form of cladding etc. and can pass through doctor Learn the effect of image system observation.

The length of the development section is more than the length of free section.

The length of the development section is 12~20cm.

Section of developing has enough length, turnover position can be indicated when sheath tune is curved, for the rough turnover of determination Angle and direction.

In the utility model transport system, the core-pipe subassembly includes core pipe, and the distal end of the core pipe is fixed with guiding Head and intervention heart valve gland, the core pipe be in seeker and intervene heart valve gland between position for for It places and intervenes valvular loading section, before release, the expansion arc of outer sheath is in the periphery for loading section.

Preferably, being equipped with casing, axial sliding fit between the casing and tube body, institute outside the tube body of the outer sheath Traction fiber is stated via the gap of tube body and casing proximally to extend.

Casing can slide and banding is in tube body periphery, be conducive to provide additional radial beam when intervening heart valve recycling It ties up, places intervention heart valve and disengaged with intervention heart valve gland.

Can also slightly have gap between casing and tube body.

It is typically provided matched engaging lug and card slot between intervention heart valve and intervention heart valve gland, once Tube body radial direction binding force is insufficient, can to intervene heart valve abjection, recycling failure, therefore can provide further by casing Safety guarantee, and the gap of tube body and casing can just provide the channel that connects of traction fiber, can be by casing when using traction fiber Suitable position is slid into, makes to reach the connecting portion with tube body after one section of an end dissociative for traction fiber distal end again.

Position especially larger in turning amplitude, the guiding to traction fiber and constraint by casing avoid traction fiber taut Next compressing in-vivo tissue, damages.

Preferably, the operation handle includes：

The fixed body of hollow-core construction；

It is slidably mounted on the traction piece connecting in fixed body and with the traction fiber；

The driving mechanism for driving traction piece to move on fixed body；

The control mechanism for driving outer sheath to move on fixed body.

Preferably, the driving mechanism includes：

The moving member for the force that axially offsets with the traction piece；

It is set on fixed body and around the adjusting knob of fixed body axial rotation, the adjusting knob is tubular and is in shifting The periphery of moving part, screw-thread fit between adjusting knob and moving member.

Preferably, the distal side fixing sleeve of the fixed body is equipped with front end handle, equipped with hollow out on the handle of front end A part for axial channel, the moving member extends the axial channel, and external screw thread is equipped on the part extended, and adjusts rotation Button is internally provided with matched internal thread.

Preferably, the axial channel is at least two, uniformly around fixed body axis distribution.

Preferably, the driving mechanism is electric pushrod, and it is sequentially connected with the traction piece.

Preferably, the control mechanism includes：

The control handle being rotatably installed in outside fixed body, and the inner wall for controlling handle carries internal thread；

It is slidably mounted on the drive link in fixed body along fixed body axis, is equipped on drive link and control handle internal thread Matched linkage double wedge, the tube body of the outer sheath are connected with drive link.

Preferably, the fixed body is equipped with the guide groove for guiding the linkage double wedge to be axially moved.

Preferably, the traction piece is loop configuration, the drive link sliding penetrates through the central area of traction piece.

Preferably, the moving member is loop configuration and sticks on the distal side of traction piece, the drive link sliding is passed through Across the central area of traction piece.

In the utility model, floating position-limiting item is located between outer sheath and intervention heart valve, filling outer sheath and intervention The diametrical gap of heart valve engaging lug so that epitheca inside pipe wall further tightens intervention heart valve radially, adds The stability that strong intervention heart valve engaging lug is connect with gland is prevented before the release completely of intervention heart valve or need to be withdrawn When surprisingly fall off and be unable to control, can be retracted outer sheath again for valve provides stable pulling force.

Floating position-limiting item can for intervention heart valve or core-pipe subassembly in the case where no outer sheath is fettered Relative position and posture are kept with the strength of materials for freely swinging or relying solely on itself.

After intervention heart valve is loaded into outer sheath, or before being completely released out outer sheath, the floating position-limiting item The cooperation kept between engaging lug and positioning region is fettered by outer sheath；Outer sheath is withdrawn, and during gradually discharging engaging lug, is floated Dynamic positive stop strip is also gradually released outer sheath, and when engaging lug discharges completely and is detached from gland, floating position-limiting item can be certainly By swinging, the floating position-limiting item being released no longer applies engaging lug radial pressing force, that is, determines that intervention heart valve is in place After good, outer sheath will continue to withdraw, and by release engaging lug and floating position-limiting item, release the floating position-limiting item of outer sheath at this time To engaging lug, infinite place acts on, secondary interference will not be caused to cause to intervene valvular displacement to intervention heart valve.

After intervention heart valve is loaded into outer sheath, floating position-limiting item also plays the effect of gasket, can compensate outer Sheath and intervention heart valve between fit tolerance, clog outer sheath and intervention heart valve engaging lug it is diametrical between Gap ensures the stabilization of relative position during pushing in vivo, and intervention heart valve is avoided surprisingly to deviate from gland.

Preferably, the initiating terminal of the floating position-limiting item and at least one of the gland or the core-pipe subassembly It is mutually fixed.

The fixed position of floating position-limiting initiating terminal is close to gland, such as is in gland proximal end and (is leaned on along conveying device Proximal operator direction) tail portion or the core-pipe subassembly that is connected with the tail portion on, before surgery by outer sheath to intervening heart valve Film and floating position-limiting item are collected so that radially containing note leans against intervention heart valve periphery to floating position-limiting item, is intervening Heart valve reach in vivo after release during, floating position-limiting item with the recession of outer sheath and the release of valve bracket and diameter is outside It sticks up.

In order to control the valvular axial position of intervention, match with gland intervening valvular proximal end and being typically provided T shapes, L-shaped, annular etc. generally may be used in the engaging lug of conjunction, engaging lug, and positioning region, which may be used, receives T shapes, L-shaped positioning Slot, or be caught in the plush copper etc. of annular makes the laden axial position of intervention heart valve be limited to positioning region, in the utility model The prior art can be used for engaging lug shape itself, be not the improved emphasis of the utility model.

Preferably, the positioning region is positioning plush copper, after the intervention heart valve loads, the engaging lug is set in It positions in plush copper, before the engaging lug is completely released out outer sheath, the floating position-limiting item is laminated on engaging lug to keep Cooperation between engaging lug and positioning region.

Preferably, the positioning region is locating slot, after the intervention heart valve loads, engaging lug is inlaid in accordingly In locating slot, before the engaging lug is completely released out outer sheath, the floating position-limiting item is laminated on engaging lug with the company of holding Cooperation between lug and positioning region.

When for example, by using locating slot, loading condition lower connecting ear is caught in locating slot, to realize that axially position, outer sheath are removed From rear, radially outward abjection locating slot of the engaging lug along holder.

It can be combined with plush copper structure when using locating slot, i.e., plush copper be set in the slot bottom of locating slot, mating connection ear Respective shapes can enhance locating effect.

Preferably, the floating position-limiting item is identical as locating slot quantity, and circumferential position corresponds.

Locating slot can guarantee that floating position-limiting item will not deviate during collecting with release.

Link closely locating slot and embedded company therein under outer sheath package at the proximal end position of floating positive stop strip under loading condition Lug.During outer sheath drops back release valve bracket, by floating position-limiting item in the extruding fastening effect of locating slot, prevent It the quick release of valve bracket and falls off.When valve bracket release process finds deviations, it can be pushed forward outer sheath, to The valve bracket of release is compressed and is recycled, and engaging lug is tightly wrapped up by floating position-limiting item and outer sheath at this time, is effectively ensured The security control of valve bracket and secondary positioning.

Preferably, the end of the floating position-limiting item at least extends to position corresponding with the engaging lug.I.e. at least Covering part engaging lug, to realize constraint to engaging lug radial motion, the end of floating position-limiting item can be on this basis Further extend towards distal end.

The end of the floating position-limiting item is for initiating terminal, and end also is understood as the distal end of floating position-limiting item Side.

Preferably, the distalmost end of the floating position-limiting item is aligned with gland distalmost end or is no more than gland distalmost end Or only slight beyond gland distalmost end.

When the floating position-limiting item has minimum length, floating position-limiting item can at least cover the engaging lug.In order into One step ensures compression effect, and the end of floating position-limiting item may be further extended to the distal side of gland or only slight beyond gland Distal side, such as more than length be less than or equal to 1cm.When floating position-limiting item has maximum length, floating position-limiting item is integrally equal It can guarantee and be convergent in outer sheath, and floating position-limiting end is flushed with the valve bracket distal side inside outer sheath, is floated at this time The length of dynamic positive stop strip can wrap up entire valve bracket, and floating position-limiting item plays the role of sliding rail, ensure that outer sheath being capable of edge Sliding rail is pushed forward and withdraws and be not directly contacted with valve bracket.

After intervening heart valve loading, the floating position-limiting item is fettered by outer sheath and engaging lug is limited in locating slot, Epitheca inside pipe wall contacts with floating position-limiting item and provides radial constraint, and engaging lug can be blocked in locating slot by floating position-limiting item It is interior, it prevents from.

Preferably, the locating slot axially through, the floating position-limiting item at the position of locating slot cooperation, part or All sink in locating slot.

The floating position-limiting item extends via locating slot to distal end, and locating slot is not only axially through radial outside is also Open, that is, there is radial opening, strictly limitation is not completely disposed on the inside of radial opening floating position-limiting item, is admitted of at part In the outside of radial opening, such as floating position-limiting section is T shapes, and locating slot is stretched into for stopping engaging lug in T shapes bottom end, and T Shape top dimension is limited to radial opening, therefore is in the outside of radial opening, can only ensure and epitheca inside pipe wall in this way Cooperation, can also take into account the cooperation with engaging lug.

Preferably, the locating slot is closed axially through region by floating position-limiting item.

Engaging lug is deviate from order to prevent, the width of floating position-limiting item can it is identical as the radial opening axially through region or Slightly wide, realization completely encloses radial opening, even if width is less than the width of radial opening, gap is at least unlikely to connect The width of the abjection of ear, floating position-limiting item is preferably identical as the radial opening axially through region, and can further prevent floating limits Position item offset.

Preferably, the floating position-limiting item sinks to the part of locating slot, engaging lug is inwardly contacted or pushed against radially.

Floating position-limiting item is although can stop engaging lug, the thickness (radial dimension) of the two and the depth of locating slot There can be different matching relationships, in the case where outer sheath coats contact gland periphery, floating position-limiting item is stacked in connection The outer wall of ear, if the thickness of floating position-limiting item and engaging lug and the depth more than locating slot, floating position-limiting item are inside radially Push against engaging lug, on the contrary it is then contact, not will produce apparent binding force, but can ensure floating position-limiting item with to company The limit of lug, as a further preference, using the relationship of abutting, it is ensured that when axial force is excessive or outer sheath local deformation It still keeps limiting.

Preferably, after intervention heart valve loads, the floating position-limiting item is contour with the outer wall of gland radially Or the outer wall higher than gland.

Floating position-limiting item is not less than the outer wall of gland radially, can to avoid floating position-limiting item and epitheca inside pipe wall it Between generate unnecessary gap so that epitheca inside pipe wall is close to floating position-limiting item, and engaging lug is pressed on to the positioning of gland In portion.

Optionally, the floating position-limiting item extends at the position of engaging lug cooperation along straight line or curve.

When floating position-limiting two sides offset with locating slot corresponding side, floating position-limiting width can be appropriate when extending along curve Narrow, intervene heart valve release when be easier to bending it is turned-out stick up avoided with discharging engaging lug engaging lug deviate from sluggishness.

Optionally, the floating position-limiting item and wide at the position of engaging lug cooperation or not wide extension.

Optionally, the floating position-limiting item and uniform thickness or uniform thickness extension at the position of engaging lug cooperation.The floating limit The position of position item and engaging lug cooperation either extends along straight line or curve, can be set as not wide and/or not uniform thickness, lead to The variation adjusting local strength for crossing width, thickness, takes into account limit and release engaging lug.

Preferably, the end of the floating position-limiting item has smooth peripheral surface.

Floating position-limiting item radial development with the release of valve bracket during use, for the end for preventing after expansion Blood vessel is stabbed, therefore end uses smooth outer profile, such as similar to the forms such as spherical crown or edge rounded corner.

Preferably, the floating position-limiting item is circumferentially uniformly arranged 2,3 or 4.

Preferably, each floating position-limiting equal or different length.

When Length discrepancy, each floating position-limiting terminal position can be different, such as wherein at least a floating position-limiting end is prolonged Extend to the distal side flush with gland；An at least floating position-limiting end extends to the distal end of intervention heart valve installation position Side.

Preferably, the floating position-limiting item is isometric 3, and it is strip structure.

Preferably, the floating position-limiting item is hollow or solid construction.

Preferably, the floating position-limiting item is solid flat strip shaped.

Radial direction using flat strip shaped structure in intervention heart valve installation position occupies little space, and is conducive to reduce compressed outer Diameter.

Preferably, the size of the floating position-limiting item is：Length 10mm-80mm, width 1-2mm, thickness 0.2- 0.5mm。

Preferably, the floating position-limiting strip adoption bonding, binding, lock, welding or integrated mode are fixed on institute On the component of connection.

Described floating position-limiting one end is initiating terminal, and the other end is end, and intermediate position is extended segment, the initiating terminal position Connecting portion in the tail portion of gland proximal end or tail portion and interior sheath, in a manner of bonding, binding, lock, welding or integration It is fixed on connected component.Floating position-limiting item extends along initiating terminal to distal end, in its natural state, the floating position-limiting item Initiating terminal is fixed, and extended segment and end axially unfold opening along core-pipe subassembly.

Optionally, when intervening heart valve loading condition, the floating position-limiting distal head is axially at least partly laminated on On the engaging lug.

Optionally, engaging lug and gland are laminated in the floating position-limiting distal head axial direction.

Optionally, engaging lug and entire gland are laminated in the floating position-limiting distal head axial direction.

Optionally, the floating position-limiting distal head is more than gland distal end to intervening valvular diameter maximum portion Position.

Preferably, the position of the floating position-limiting item and outer sheath cooperation, and in the position of support assorted, at least Have at one with smooth surface and/or with lubricant coating.

Preferably, the floating position-limiting item is polytetrafluoroethylene material.

Preferably, being additionally provided with positioned at epitheca inside pipe wall and the fixed guide item that axially extends.

Fixed guide item is fixed on one side in (along conveying device far from the operator direction) tubular shell of outer sheath distal end Portion, axially extending arrangement of the fixed guide item along tubular shell.During outer sheath is collected with valve bracket is discharged, valve branch Frame is in direct contact with the fixed guide item in outer sheath tubular shell, is carried out by the smooth track that fixed guide item provides Quick, the control accurate of valve bracket.

Can be that contact portion or whole are fixedly linked, or use and be spaced apart between fixed guide item and epitheca inside pipe wall Multiple fixed points, since fixed guide item needs to move back and forth with outer sheath, preferably, the axial direction of fixed guide item Both ends are at least fixed with epitheca inside pipe wall, to avoid the space interference for turning over and sticking up when causing movement is generated.

Operation consent outer sheath collects valve bracket, and fixed guide item is close to valve bracket.It is released in subsequent valve bracket In putting, fixed guide item provides smooth rail between outer sheath tubular shell and valve bracket (close to the one side of valve bracket) Road reduces contact friction, is convenient for the release and control of valve bracket.

" floating " gib block and " fixation " gib block are that in contrast, " floating " refers to that one end is fixed in the utility model, And the other end can at least be swung radially in the case of no external constraint, and due to the limitation of own material intensity, It is general also to allow that circumferential offset occurs.

Preferably, the floating position-limiting item is alternately arranged with fixed guide item along week.

Locating slot in the distribution and gland of each fixed guide item is staggered, also imply that with floating position-limiting item with it is solid Determine gib block to be staggered.

Preferably, the end of the floating position-limiting item is identical as the axial position of the distal side of fixed guide item or interlocks Arrangement.

Preferably, the fixed guide item is circumferentially uniformly arranged 2,3 or 4.

Preferably, each fixed guide equal or different length.

Preferably, the fixed guide item is isometric 3, and it is strip structure.

Preferably, the fixed guide item is hollow or solid construction.

Preferably, the fixed guide item is solid flat strip shaped.

Radial direction using flat strip shaped structure in intervention heart valve installation position occupies little space, and is conducive to reduce compressed outer Diameter.

Preferably, the size of the fixed guide item is：Length 10mm-80mm, width 1-2mm, thickness 0.2- 0.5mm。

Preferably, the length 60mm-80mm of the fixed guide item.

In the utility model, the floating position-limiting item, the shape of fixed guide item and size are arranged independently of each other, such as It can be the solid or hollow structure of strip；Its cross sectional shape is preferably flat, in order to reduce the whole radial direction in outer sheath distal end Size, the radial direction of thickness direction, that is, outer sheath of flat pattern.

For the ease of controlling the release and recycling of holder, the contact area with outer sheath is reduced, to reduce between the two Relative friction, floating position-limiting item, fixed guide item also have the selection of suitable size accordingly.

Preferably, the fixed guide strip adoption bonding, binding, lock, welding or integrated mode fix epitheca Inside pipe wall.

Preferably, the position of the fixed guide item and intervention heart valve cooperation has smooth surface and/or has Lubricant coating.

Preferably, the fixed guide item is polytetrafluoroethylene material.

In the utility model, the floating position-limiting item, fixed guide item material mutually independent can choose, as excellent Choosing is made of the preferable biocompatible materials of elasticity, and the prior art may be used in the selection of specific material.

To ensure that floating position-limiting item, fixed guide item have the dynamic friction factor of suitable elasticity and minimum, it is preferable that sliding Polytetrafluoroethylene (PTFE) (PTFE) can be selected in rail material.After valve bracket discharges in human body, sliding rail is dropped back with transport system, after sliding rail Friction is contacted with the valve bracket discharged completely during removing, the bullet during dropping back for anti-anti-slip track between valve bracket Power will not move holder, it is furthermore preferred that the outer surface of floating position-limiting item or fixed guide item is as smooth as possible or is arranged on surface Hydrophilic monomer or high molecular polymer with lubrication property, such as N, N- diformazans can be selected in lubricant coating, lubricating coating materials Base acryloyl (DMAA), acrylamide (AAm), n-vinyl pyrrolidone (NVP), polyvinyl alcohol (PVA), polyacrylamide (PAAm), above-mentioned coating material is attached to floating position-limiting item by coupling agent or chemical method or consolidated by polyethylene glycol (PEG) etc. Determine the outer surface of gib block.

The outer sheath includes successively from inside to outside internal layer, middle layer and outer layer, and the middle layer is by distal end to proximal end Include first segment, second segment and third section successively, the first segment is engraved structure, and the engraved structure includes at least two Hollow-out unit, distal end disconnected from each other setting of adjacent two hollow-out units in first segment circumferential direction.

In the outer sheath, the internal layer, the middle layer and the outer layer along the outer sheath radial direction successively Be arranged from the inside to the outside, the first segment, the second segment and the third section to the outer sheath distal end to described outer The proximal end of sheath is sequentially distributed.

Circumferential direction due to the hollow-out unit on the first segment in the distal end of the first segment is disconnected from each other.First segment can be suitable It answers the internal layer and outer layer and expands, while to make the distal end of the outer sheath that there is better scalability, have foot Enough axially and radially support forces, and hollow-out unit is in rounding state, to further provide for enough axial directions and diameter To support force.So that in intervening heart valve removal process, enough axially and radially support forces are provided, so as to be given an account of Enter that heart valve is quick, safely recycles.

Two adjacent hollow-out units are set between the distal end of first segment circumferential direction in one of the embodiments, There is hollow out gap, the range of the hollow out gap L is between 0.5mm-8mm.

Axial not closed space is formed between two adjacent hollow-out units in one of the embodiments,.

The hollow-out unit in the first segment circumferential direction forms multiple hollow-out unit groups, phase in one of the embodiments, It is circumferentially disconnected from each other in the first segment between two groups of adjacent hollow-out unit groups.

Two adjacent hollow-out units are mutual between the distal end of first segment circumferential direction in one of the embodiments, Phase separation is interconnected or independent mutually in the proximal end of first segment circumferential direction, and is connect with the second segment.

At least one hollow hole is offered in the hollow-out unit in one of the embodiments, the hollow hole is along institute It is axial from distally proximally extending to state hollow-out unit.

The hollow-out unit includes at least one hollow out segment in one of the embodiments, is opened on the hollow out segment Equipped at least one hollow hole.

The hollow out hole area accounts for the 40-80% of the hollow-out unit area in one of the embodiments,.

The hollow out hole area accounts for the 60-70% of the hollow-out unit area in one of the embodiments,.

The distal end of the hollow-out unit is equipped with arc section, the arcuate directions of the arc section in one of the embodiments, The distal end protrusion setting of the hollow-out unit.

The radius of the arc section is 0.3mm-16mm in one of the embodiments,.

Traction fiber in the utility model outer sheath has one section be free in outside sheath tube body, tool plus is convenient for when drawing The posture of force, by the relative motion with tube body, change impetus that can also be adaptive, for larger turning radius, Or intervention heart valve it is longer, it is harder it is unpliant in the case of, improve the safety and flexibility of operation.

Compared with prior art, the outer sheath, the epitheca with the outer sheath and intervention heart valve conveying dress The circumferential direction set due to the hollow-out unit on the first segment in the distal end of the first segment is disconnected from each other.First segment can be complied with described Internal layer and outer layer and expand, to make the outer sheath distal end have better scalability while, have enough axis To and radial support power, and hollow-out unit is in rounding state, to further provide for enough axially and radially supports Power.So that in intervening heart valve removal process, enough axially and radially support forces are provided, so that the intervention heart Valve is quick, safely recycles.Outer sheath is reduced using floating position-limiting item to a certain extent and intervenes valvular connect Contacting surface is accumulated, and smooth track is also used as, and is reduced relative friction forces when contacting two-by-two, can be led to during outer sheath is pushed forward and is withdrawn Cross with the contact of floating position-limiting item reduce doctor operation when direct active force, to realize to valve bracket discharge with recycle It accurately controls.Fixed guide item further is can be combined with, operation consent outer sheath collects valve bracket, fixed guide item and valve Membrane support is close to.In subsequent valve bracket release, fixed guide item carries between outer sheath tubular shell and valve bracket For smooth track, contact friction is reduced, the release and control of valve bracket are convenient for.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model conveying device；

Fig. 2 is the structural schematic diagram at the utility model delivery device distal position；

Fig. 3 is the structural schematic diagram for latching position；

Fig. 4 is the structural schematic diagram of floating position-limiting end；

Fig. 5 a are intervention heart valve part release conditions figure；

Fig. 5 b are state diagram of the floating position-limiting item in the release of intervention heart valve part；

Fig. 5 c are the state diagram intervened when heart valve discharges completely；

A kind of structural schematic diagram when Fig. 6 is using positive stop strip；

Fig. 7 a are the structural schematic diagram before another intervention heart valve release；

Fig. 7 b are the structural schematic diagram (opposite Fig. 7 a, eliminate part outer sheath) before Fig. 7 a intervene heart valve release；

Fig. 8 is structural schematic diagram when being also equipped with fixed guide；

Fig. 9 is outer sheath schematic cross-section；

Figure 10 a are the preceding state diagram of intervention heart valve release completely when being equipped with floating position-limiting item and fixed guide；

Figure 10 b are the preceding state diagram of intervention heart valve release completely when being equipped with floating position-limiting item and fixed guide (opposite Figure 10 a, eliminate part outer sheath)；

Figure 11 a are the schematic diagram that engaging lug matches position with gland；

Figure 11 b are the engaging lug of Figure 11 a by the schematic diagram after being pressed on floating position-limiting item；

Figure 12 a are the schematic diagram that another engaging lug matches position with gland；

Figure 12 b~Figure 12 d are the engaging lug of Figure 12 a by the schematic diagram for being pressed on different shape floating position-limiting item；

Figure 13 a~Figure 13 d are another engaging lug by the schematic diagram for being pressed on different length floating position-limiting item；

Figure 14 is the structural schematic diagram of conveying device provided by the utility model；

Figure 15 is the structural schematic diagram at delivery device distal position provided by the utility model；

Figure 16 is the structural schematic diagram of outer sheath provided by the utility model；

Figure 17 is the schematic cross-section of delivery conduit provided by the utility model；

Figure 18 is intervention heart valve structural schematic diagram provided by the utility model；

Figure 19 is the schematic cross-section of outer sheath provided by the utility model；

Figure 20 is the structural schematic diagram of the second middle layer provided by the utility model；

Figure 21 is the structural schematic diagram at another visual angle of the second middle layer provided by the utility model；

Figure 22 is the flaring state structural schematic diagram of the structure of the second middle layer provided by the utility model；

Figure 23 is the second middle layer distal structure schematic diagram provided by the utility model；

Figure 24 is the schematic enlarged-scale view at E in Figure 21 provided by the utility model；

Figure 25 is the schematic enlarged-scale view at F in Figure 22 provided by the utility model；

Figure 26 provides the second middle layer distal end another example structure schematic diagram for the utility model；

Figure 27 is the structural schematic diagram of outer sheath use state in the prior art；

Figure 28 a are the structural schematic diagram of the utility model outer sheath use state；

Figure 28 b are the structural schematic diagram of another use state of the utility model outer sheath；

Figure 28 c are the structural schematic diagram of another use state of the utility model outer sheath；

Figure 28 d are the structural schematic diagram of another use state of the utility model outer sheath；

Figure 29 is the structural schematic diagram of the utility model outer sheath distal side；

Figure 30 is the structural schematic diagram of distal side in the utility model outer sheath another way；

Figure 31 is the structural schematic diagram of distal side in the utility model outer sheath another way；

Figure 32 is the structural schematic diagram of distal side in the utility model outer sheath another way；

Figure 33 is the partial schematic diagram of traction fiber and tube body connecting portion in the utility model outer sheath；

Figure 34 is the schematic cross-section of traction fiber and tube body connecting portion in the utility model outer sheath.

Figure 35 is the structural schematic diagram of the utility model transport system；

Figure 36 is sectional view at A-A in Figure 35；

Figure 37 is the explosive view at operation handle position in transport system in Figure 35；

Figure 38 be Figure 35 in transport system do not adjust it is curved before structural schematic diagram；

Figure 39 is D magnified partial views in Figure 38；

Structural schematic diagrams of the Figure 40 for transport system tune in Figure 35 after curved；

Figure 41 is E magnified partial views in Figure 40；

Figure 42 is the stereogram at transport system operation handle position in Figure 35；

Figure 43 is that the schematic diagram after adjusting knob is omitted in Figure 42；

Figure 44 is the enlarged drawing of the parts F in Figure 43.

Specific implementation mode

The utility model is described in detail below in conjunction with drawings and examples.It should be appreciated that described herein Specific embodiment only to explain the utility model, is not used to limit the utility model.Proximal end described in text refers to along conveying It is along the one end of conveying device far from operator direction, embodiment intermediary that device, which leans on the one end in proximal operator direction, the distal end, Enter heart valve by taking valve bracket as an example.

Referring to Fig. 1, the present embodiment transport system includes seeker 2, core-pipe subassembly 7, floating position-limiting item 1, gland 3, interior Sheath 4, outer sheath 5 and operation handle 6.

Seeker 2 and gland 3 are each attached on core-pipe subassembly 7, and wherein seeker 2 is located at the distalmost end of core-pipe subassembly 7, 7 distal side of core-pipe subassembly is also arranged with gland 3, is intervention heart valve installation position between seeker 2 and gland 3；Epitheca Pipe 5 is in the periphery of intervention heart valve installation position and can slide axially, the proximal end of core-pipe subassembly 7 and outer sheath 5 with operation Handle 6 is connected, and the sliding axially relative to core-pipe subassembly 7 of outer sheath 5 can be realized by operation handle 6, in addition 4 basis of interior sheath It needs to be arranged, can also omit, interior sheath 4 is sleeved on core-pipe subassembly 7 and is located at 3 proximal lateral of gland, and interior sheath 4 is general not It is axially moved with outer sheath 5, when core-pipe subassembly is made of stainless steel, interior sheath is it is also assumed that be overlay film in core-pipe subassembly The coating layer of 7 outer surfaces.

Core-pipe subassembly 7 can also be to be linked to be by two sections of plugged and fixeds, plugging position is preferably placed at fixation with single part To ensure the smooth of bonding strength and appearance in first 3.

Floating position-limiting item 1 is isometric three in Fig. 1, is arranged successively in the circumferential, the case where no outer sheath 5 fetters It is stretched naturally in release conditions down.

Referring to Fig. 2, the different parts of floating position-limiting item 1 can be divided into initiating terminal 103,102 and of extended segment according to present position End 101, initiating terminal 103 are fixed on core-pipe subassembly 7 and are in the proximal lateral of fixed head-tail 32, visible in figure to be located at interior sheath Between pipe 4 and fixed head-tail 32.Initiating terminal 103 can certainly be arranged on core-pipe subassembly 7, for example be arranged in gland On core-pipe subassembly 7 between the proximal lateral of tail portion 32 and the distal side of interior sheath 4.The periphery of gland 3 is equipped with locating slot, due to Locating slot needs and intervenes valvular engaging lug cooperation, therefore its position and shape can match with engaging lug, figure There are three middle locating slots and axial position interlaced arrangement, such as the locating slot 31 in figure and locating slot 33, in order not to as blocking The extension of floating position-limiting item 1, locating slot are used axially through structure, and engaging lug radially extends out disengaging positioning when valve bracket discharges Slot, therefore locating slot radial outside is open, that is, has radial opening.

Locating slot is axially through the alar part of, both sides with extension in figure, to coordinate the engaging lug of T shapes, floating position-limiting item 1 to By corresponding locating slot axially through position when distal end extends, the floating position-limiting item 1 in Fig. 2 is in loading condition.

Bonding can be used in the initiating terminal 103 of floating position-limiting item, binding, lock, welding, integrated mode are fixed.It is viscous Condensation material selects the anticorrosive glue crosslinking agent with biocompatibility.Binding material selects that flexibility is strong, corrosion resistant wiring.

Welding manner can be connected to fixed head-tail or core-pipe subassembly will be latched made of alloy material, then pass through lock Banding initiating terminal is detained, for example, see Fig. 3,103 banding of initiating terminal of floating position-limiting item 1 is in the lock of stainless steel (material 306) In 14, part extended segment 102 is only illustrated in figure, lock 14 is connected in a welding manner on gland 3 or core-pipe subassembly 7.

Floating position-limiting item 1 is the solid or hollow structure of strip, and solid flat bar, end 101 are used in the present embodiment In order to avoid the outer rim structure of arc can be used in corner angle (referring to Fig. 4).

Every floating position-limiting item 1 a length of 10mm-80mm, wide 1-2mm, thick 0.2-0.5mm.When floating position-limiting item 1 has most When long length, whole can guarantee of floating position-limiting item 1 is convergent in outer sheath 5.

In conjunction with Fig. 5 a and Fig. 5 b, to ensure that there is floating position-limiting item 1 smaller dynamic friction factor, floating position-limiting item 1 to select Polytetrafluoroethylene material is fabricated；Every 1 long 15mm of floating position-limiting item in figure, the positioning well width phase of width and gland 3 It adapts to, thickness 0.5mm, when floating position-limiting item 1, which is in, collects state, three floating position-limiting items 1 are corresponding axially through position Locating slot and further extend towards distal end, valve bracket 8 is with there are three the engaging lugs 81 of T shapes, in order to adapt to engaging lug shape, Locating slot on the basis of T shapes axially through, that is, be in crosswise, in order to ensure limit effect, locating slot axially through region It is completely enclosed by corresponding floating position-limiting item 1, i.e., 1 width of floating position-limiting item is adapted with axially through peak width, if perforation Region is not along the wide extension of axis, then 1 width of floating position-limiting item is at least corresponding to perforation region most narrow portion position, to ensure Locating slot is partially or completely sunk to, the outside of floating position-limiting item 1 can be slightly higher than the peripheral surface of gland 3, to reduce gland 3 Friction between 5 inner wall of peripheral surface and outer sheath.

When valve bracket 8 is loaded into conveying device, floating position-limiting item 1 is wrapped in valve bracket 8 and is collected together in outer In sheath 5；During valve bracket 8 discharges, as shown in Figure 5 a, along the directions arrow M, outer sheath 5 is along floating position-limiting Item 1 (floating position-limiting item is in epitheca 5 in figure, thus is not drawn into) is smooth to be withdrawn, and floating position-limiting item 1 is in work shape at this time State：When holder engaging lug 81 is in outer sheath 5, due to the constraint of outer sheath 5, floating position-limiting item 1 acts on holder engaging lug On 81, the pop-up of holder engaging lug 81 is prevented.Then, as shown in Figure 5 b, withdrawn further along arrow M with outer sheath 5, The end 101 of floating position-limiting item 1 is detached from the constraint of outer sheath 5, extended segment 102 and holder engaging lug still in outer sheath 5, this When extended segment 102 act on holder engaging lug 81, engaging lug 81 overcomes holder in self-expanding because of the effect of extended segment 102 The huge expansive force generated in the process is discharged, is securely fastened in the locating slot 33 of bracket fixing head 3.If finding valve at this time Releasing position is inaccurate, can be recycled to holder by the outer sheath 5 that moves ahead, to be discharged again.Finally, when determination is worked as When preceding releasing position is accurate, as shown in Figure 5 c, continues on arrow M and withdraw outer sheath 5,101 He of end of floating position-limiting item 1 Extended segment 102 no longer by the constraint of outer sheath 5, the end 101 and extended segment 102 of floating position-limiting item 1 with valve bracket 8 expansion And be unfolded, floating position-limiting item 1 is in off working state at this time, i.e., does not apply force on engaging lug 81, to complete valve The release of holder 8.

The active force that floating position-limiting item 1 applies holder engaging lug, the on the one hand constraint from outer sheath, in an other side The initiating terminal 103 in face, floating position-limiting item 1 is fixed due to abutting gland 3, and the extended segment 102 of neighbouring initiating terminal 101 is originated The binding force at end 103, when the engaging lug of valve bracket 8 is embedded into the locating slot 33 of gland 3,1 proximal end of floating position-limiting item Locating slot 33 is close in extended segment, gives one radially inward pressure of engaging lug of valve bracket 8, can prevent valve bracket 8 from existing The premature locating slot 33 for being detached from gland 3 of engaging lug during release and cause valve bracket 8 to discharge suddenly, while in valve During holder 8 discharges, if the problems such as finding deviations needs to place again, since 1 proximal end of floating position-limiting item is to predetermined The binding force of engaging lug in the slot 33 of position, it is ensured that outer sheath 5 is pushed forward along floating position-limiting item 1, to the part valve branch discharged Frame 8 is collected, to realize the recycling of valve bracket 8.

Referring to Fig. 6, in other embodiments, 1 axial length of floating position-limiting item is shorter, and end and 3 distal end of gland are neat It is flat.

Floating position-limiting item 1 is between the engaging lug and outer sheath 5 of valve bracket 8 and between outer sheath 5 and gland 3 Smooth track is provided, relative friction forces when contacting two-by-two are reduced, during outer sheath 5 is pushed forward and withdraws can by with floating The contact of positive stop strip 1 reduces direct active force when doctor operates, to realize the accurate control discharged to valve bracket 8 with recycling System.

Floating position-limiting item 1 is three solid strips in Fig. 6, and is made of polytetrafluoroethylene material, and floating position-limiting item 1 rises Beginning is fixed on the proximal end tail portion of gland 3 by bonding mode, and the end of floating position-limiting item 1 is flushed with 3 distal end of gland, i.e., Engaging lug position can be at least completely covered and be limited in locating slot, 1 width of floating position-limiting item and locating slot 33 axially through The equivalent width in region, thickness 0.5mm.

The structural schematic diagram before valve bracket release completely is shown in conjunction with Fig. 7 a, 7b, Fig. 7 a, in fig.7b, in order to clear Chu shows the structure between the engaging lug 81 and floating position-limiting item 1 of valve bracket 8, is omitted in fig.7b positioned at floating position-limiting item 1 and gland 3 outside part outer sheath 5.In the present embodiment, valve bracket 8 has engaging lug 81, when valve bracket 8 fills When being downloaded in conveying device, the length that floating position-limiting item 1 extends is suitable with 3 remote location of gland, and end is only capable of compressing embedding Enter the engaging lug inside gland locating slot 33.When valve bracket 8 is transported to human body and discharges, outer sheath 5 is dropped back, valve branch Frame 8 gradually discharges.At this point, the engaging lug 81 of valve bracket 8 is embedded into the locating slot 33 of gland, engaging lug is by floating position-limiting The force effect that collects of 1 initiating terminal of item is firmly strapped in locating slot 33, avoids having discharged what valve bracket 8 applied engaging lug end It extends out power and makes the premature complete release of holder.

Using the floating position-limiting item 1 of shorter size, the influence normally discharged to holder and unnecessary constraint are can avoid, is floated The length of dynamic positive stop strip 1 can also extend to the axial central region of valve bracket 8, such as valve when being discharged completely no more than valve Point A at the full-size of film axial direction, such as in Fig. 5 c.

Referring to Fig. 8 and Fig. 9, in other embodiments, the distal end inner wall of outer sheath 5 is additionally provided with fixed guide item 51.

In figure in addition to illustrating floating position-limiting item 1, seeker 2, gland 3, interior sheath 4, outer sheath 5, valve bracket 8, It is additionally provided with fixed guide item 51 in the inner wall of outer sheath 5, fixed guide item 51 is isometric three, circumferentially uniformly arrangement, and It is fixed on 5 distal tubular shell inner surface of outer sheath, smooth track is provided between valve bracket 8 and outer sheath 5.

The circumferential position of each fixed guide item 51 and the locating slot in gland 3 (i.e. floating position-limiting item 1 is circumferentially distributed) It is staggered, when outer sheath 5 collects valve bracket 8, fixed guide proximal end abuts gland 3, and position and locating slot are one by one Staggeredly.

Fixed guide item 51 is solid flat bar, length 10mm-80mm, width 1-2mm, thickness 0.2-0.5mm, this implementation The length about 60mm corresponding to 8 axial length of valve bracket of fixed guide item 51 in example.

Fixed guide item 51 fixes 5 inner wall of outer sheath using bonding, binding, lock, welding or integrated mode, fixed Gib block 51 is polytetrafluoroethylene material, and the position coordinated with intervention heart valve 8 is applied with smooth surface and/or with lubrication Layer.Under best realization method, fixed guide item 51 and the inner wall of outer sheath 5 are integrally formed, and fixed guide item 51 is to epitheca The projecting inward fin of pipe 5, with smooth surface and/or with lubricant coating.

In conjunction with Figure 10 a, 10b, Figure 10 a show intervention heart valve when being equipped with floating position-limiting item and fixed guide Release conditions figure saves in figure 10b in order to clearly show that the structure between the engaging lug 81 of valve bracket 8 and floating position-limiting item 1 The part outer sheath 5 outside floating position-limiting item 1 and gland 3 is omited.When valve bracket 8 discharges, outer sheath 5 passes through solid Determine gib block 51 and 8 contact slide of valve bracket, outer sheath 5 can be withdrawn in the case of frictional force very little and realizes holder gradually Release.

When outer sheath 5 withdraws the position of gland 3, valve bracket 8 only has engaging lug and is packed in outer sheath 5. At this point, fixed guide item 51 is completely disengaged with valve bracket 8, floating position-limiting item 1 is pressed on engaging lug by collecting for outer sheath 5 On.Continue to withdraw outer sheath 5, floating position-limiting item 1 is gradually reduced the power that collects of engaging lug, and engaging lug gradually discharges.To sum up, valve The smooth track and the realization of radially inward compaction forces that membrane support 8 is provided by fixed guide item 51, floating position-limiting item 1 are gradually released It puts.

As a further improvement, in other embodiments, the floating position-limiting item part is arranged determines in gland On/within the slot of position, playing limit bracket fixed ear and radially extend out disengaging locating slot, another part is arranged on gland periphery wall, Play the role of sliding rail, outer sheath is slided along this floating position-limiting item.Under best mode, floating position-limiting item corresponding with locating slot Distalmost end and gland are aligned or no more than gland distalmost end or only slight beyond gland distalmost end.

Following embodiment is mainly for the length and shape and engaging lug of floating position-limiting item and the cooperation of gland Mode is described further, and related other component may be used or in conjunction at least one of aforementioned each embodiment.

Referring to Figure 11 a and Figure 11 b, engaging lug 81 is T shapes, and the positioning region in gland 3 is locating slot 33, loading condition Under, engaging lug 81 is inlaid in the corresponding locating slot of shape 33, and floating position-limiting item 1 is laminated on engaging lug 81 by the constraint of outer sheath On, to prevent engaging lug 81 from deviating from from locating slot 33, during holder is released, when outer sheath completely disengages floating position-limiting item 1 When, just release the limit of engaging lug 81.

Referring to Figure 12 a~Figure 12 d, engaging lug 81 is U-shaped, and U-shaped opening side is connected with holder, and U-shaped opening is closed, Positioning region in gland 3 is positioning plush copper 34, and engaging lug 81 is hung in positioning plush copper 34 using U-shaped structure, it can be achieved that axial Positioning, in order to avoid the excessively diameter convex of engaging lug 81 is equipped with sedimentation in the outer wall of periphery, that is, gland 3 of positioning plush copper 34 Slot 35, engaging lug 81 are stacked in subsider 35, can be realized with the outer wall of gland 3 radially contour.

In Figure 12 b, floating position-limiting item 1 is bifurcation structure, i.e. U-shaped, non-bifurcation is fixed on the outside of gland 3, point Fork position is laminated on the outside of engaging lug 81 to distally extending up to.

In Figure 12 c, floating position-limiting item 1 is single strip structure, is equally also laminated on engaging lug 81 to distally extending up to Outside.

In Figure 12 d, floating position-limiting item 1 is bifurcation mechanism, but uses V-arrangement or Y shape, and non-bifurcation is fixed on gland 3 Outside, bifurcation is laminated on the outside of engaging lug 81 to distally extending up to.

Referring to Figure 13 a~Figure 13 d, it is shown that structural schematic diagram of the engaging lug by the floating position-limiting item 1 for being pressed on different length. When intervening heart valve loading condition, outer sheath 5 fetters floating position-limiting item 1, and engaging lug 81 is positioned to the outside of gland, fixed For positioning region on head is in the way of positioning plush copper 34, the distal side of floating position-limiting item 1 is at least partly laminated on engaging lug 81 On.

The distal side of the visible floating position-limiting items of Figure 13 a 1 is laminated on engaging lug 81, and the distal side of floating position-limiting item 1 is not yet Positioning plush copper 34 is extended to, the fraction region of engaging lug 81 is only laminated.

The distal side of the visible floating position-limiting items of Figure 13 b 1 is laminated on engaging lug 81, and the distal side of floating position-limiting item 1 is in axis The positioning region being upwardly into major general's gland is completely covered, that is, has crossed positioning plush copper 34, reaches the distal side of gland 3, Axis laminates engaging lug 81 and entire gland 3 up towards distal end side.

The distal side of the visible floating position-limiting items of Figure 13 c 1 is laminated on engaging lug 81, and the distal side of floating position-limiting item 1 is in axis Up over gland.

The distal side of the visible floating position-limiting items of Figure 13 d 1 is laminated on engaging lug 81, and the distal side of floating position-limiting item 1 is in axis It up over gland, reaches and intervenes the maximum position of heart valve diameter, due to being fettered by outer sheath under loading condition, be situated between It is almost the same to enter valvular outer diameter, therefore the maximum position of diameter can be regarded as the maximum position of diameter under release conditions.

Following embodiment is illustrated mainly for the improvement of outer sheath, and related floating position-limiting item or other component can To be employed or in combination at least one of aforementioned each embodiment.

Referring to Figure 14 and Figure 18, conveying device 100 intervenes heart valve 82 to the corresponding position of human body to convey.Institute The intervention heart valve 82 stated can be valve bracket or the holder of its type.

The conveying device 100 include core-pipe subassembly 10, epitheca 20, operation handle 30, the core-pipe subassembly 10 with it is described Operation handle 30 connects, and the epitheca 20 is slidably sheathed on the core-pipe subassembly 10, and the epitheca 20 is located at the core pipe group Between part 10 and the operation handle 30.The intervention heart valve 82 is loaded on the core-pipe subassembly 10, and is housed in institute It states in epitheca 20.To control, the relatively described epitheca 20 of the core-pipe subassembly 10 is axial to move ahead or returns the operation handle 30 It removes, so that the intervention heart valve 82 release or recycling.

The core-pipe subassembly 10 includes core pipe 11, seeker 12.The proximal end of the core pipe 11 connects with the operation handle 30 It connects, the distal end of the core pipe 11 is pierced by from the epitheca 20 and is connect with the seeker 12.Herein, it is to be understood that The proximal end is that in contrast, specifically, the proximal end refers to leaning on proximal operator side along the conveying device 100 with the distal end To one end, the distal end be along the one end of the conveying device 100 far from operator direction.

Referring to Figure 15, the core pipe 11 includes middle pipe 111 and loading section 112.The proximal end of the middle pipe 111 and the behaviour Make the connection of handle 30, the distal end of the middle pipe 111 is equipped with gland 1111 and floating position-limiting item 1112.The gland 1111 are fixed for the intervention heart valve 82 matching with that will intervene heart valve 82.The loading section 112 is located at described solid Determine between first 1111 and the seeker 12, the proximal end for loading section 112 is retained in the gland 1111, the loading The distal end of section 112 is connect with the seeker 12, and the loading section 112 is located in the epitheca 20, and the loading section 112 is used In loading the intervention heart valve 82.

Further, the floating position-limiting item is more than the gland 1111 described in the axial length of the core pipe 11 The axial length of core pipe 11.

Bonding can be used in the floating position-limiting item 1112, binding, lock, welding, integrated mode are retained on the middle pipe On 111.The floating position-limiting item 1112 reduces epitheca 20 and intervenes the contact area of heart valve 82 to a certain extent, As smooth track, reduces epitheca 20 and intervene relative friction forces when heart valve 82 contacts, it is relatively described outer in core pipe 11 Sheath 20 can reduce direct work when doctor's operation by the contact with floating position-limiting item 1112 during axially moving ahead or withdraw Firmly, the intervention release of heart valve 82 is accurately controlled with recycling to realize.

Referring to Figure 16, epitheca 20 is usually formed as tubular structure, epitheca 20 have certain flexibility, axial support force with And radial support power.Including delivery conduit 21, coupling tube 22 and outer sheath 23, the proximal end of the delivery conduit 21 and the behaviour Make the connection of handle 30, the distal end of the delivery conduit 21 is connect with the outer sheath 23.The inside of the delivery conduit 21 and institute State the inside connection setting of outer sheath 23.The coupling tube 22, institute are equipped between the delivery conduit 21 and the outer sheath 23 It states and is interconnected by the coupling tube 22 between delivery conduit 21 and the outer sheath 23.The core pipe 11 sequentially passes through described Delivery conduit 21, coupling tube 22 and outer sheath 23.

The intensity of the distal end of the delivery conduit 21 is sequentially increased from the delivery conduit 21 to 23 direction of the outer sheath. To make the delivery conduit 21 have it is certain it is flexible simultaneously, but also with axial support force, make the delivery conduit 21 Different implantation points can be met.The diameter of the delivery conduit 21 is less than the diameter of the outer sheath 23.

Referring to Figure 17, the delivery conduit 21 includes three-decker.Specifically, the delivery conduit 21 includes along described defeated Send 21 radial direction of conduit that the first internal layer 211, the first middle layer 212 and the first outer layer 213 are set from the inside to the outside successively.It is described A variety of combinations may be used between first internal layer 211, first outer layer 213 and first middle layer 212.For example, Pass through heat fusing or binder mode between first internal layer 211, first outer layer 213 and first middle layer 212 Connection；Or first internal layer 211, first outer layer 213 are realized and the first middle layer by immersion liquid or sprayed coating mode 212 connection.The profit of identical or different high molecular material may be used in first internal layer, 211 and first outer layer 213 Sliding elastomer so that the delivery conduit 21 have it is certain it is flexible simultaneously, but also with enough axial support forces, also have Standby sliding capability.To even if during implantation intervenes heart valve 82, have tortuous implantation site (for example, working as edge When moving body arch of aorta bending) it can also complete accurately to be implanted into.PTFE can be used in first internal layer 211 (Polytetrafluoroethylene, polytetrafluoroethylene (PTFE)), PEBAX (Polyeherblock amide, polyether block amide) Equal high molecular materials, first outer layer 213 is using PTFE, PU (Polyurethane, polyurethanes, referred to as poly- ammonia Ester), Pebax (A Kema nylon elastomers), the materials such as PE (polyethylene).In the present embodiment, first internal layer 211 with And first outer layer 213 is using the lubrication elastomer of identical high molecular material, including PTFE (Polytetrafluoroethylene, polytetrafluoroethylene (PTFE)) or PEBAX (Polyeherblock amide, polyether block acyl Amine).

First middle layer 212 is formed using metal braid or by cuts in metallic pipe, to make the delivery conduit 21 can keep certain axial support force again with centainly flexible.Preferably, first middle layer 212 uses Cuts in metallic pipe forms.

Coupling tube 22 is used to connect the transition between the delivery conduit 21 and the outer sheath 23.Further, institute The section for stating coupling tube 22 is trapezoidal.The structure of the coupling tube 22 is identical as the structure of the outer sheath 23.

Intervene after heart valve loads, contain the loading section 112 in the outer sheath 23, the outer sheath 23 to Accommodate the intervention heart valve 82.Before discharging the intervention heart valve 82, the intervention heart valve 82 is in ice water It is accommodated in the outer sheath 23 by compression in mixture.Herein, it is to be understood that referring to Figure 18, the intervention heart Valve 82 includes holder 83 and valve, and the valve is by manually sewing on the holder 83.The holder 83 uses nickel Titanium alloy holder, the valve are made of biomaterials such as Pigs Hearts packet, bovine pericardiums.The nick-eltitanium alloy stent is remembered with shape Recall function, softens in mixture of ice and water, to be easily folded in the outer sheath 23 by compression, when discharging in blood, energy Expansion restores shape when its expansion.

During release, by operating operation handle 30 so that the outer sheath 23 is axially moved with respect to core pipe 11, is released Intervention heart valve 82 is put, during this, once find that the releasing position for intervening heart valve 82 just, does not pass through operation Handle 30 so that outer sheath 23 moves ahead with respect to mandrel, and the part of 23 distal end of outer sheath is made gradually to wrap up intervention heart valve 82, Under binding force (adjacent circumferential expansion resistance) effect of outer sheath 23, so that the intervention heart valve 82 is compressed and be recycled to outer sheath 23 In.

Referring to Figure 19, the axis of the outer sheath 23 and the axis of the delivery conduit 21 and the axis weight of coupling tube 22 Close setting.The outer sheath 23 includes three-decker.Specifically, the outer sheath 23 includes along 23 radial direction of the outer sheath Second internal layer 23a, the second middle layer 23b and the second outer layer 23c are set from the inside to the outside successively.It is the second internal layer 23a, described A variety of combinations may be used between second middle layer 23b and the second outer layer 23c.For example, the second internal layer 23a And it is connected by heat fusing or binder mode between the second outer layer 23c and the second middle layer 23b.Described second The lubrication elastomer of identical or different high molecular material may be used in internal layer 23a and the second outer layer 23c, so that described outer Sheath 23 have it is certain it is flexible simultaneously, but also with enough axial support forces, be also equipped with sliding capability.In described second PTFE (Polytetrafluoroethylene, polytetrafluoroethylene (PTFE)) high molecular material may be used in layer 23a, and the second outer layer 23c can With using using PTFE, PU (Polyurethane, polyurethanes, abbreviation polyurethane), Pebax (A Kema nylon elastics Body), the materials such as PE (polyethylene).In the present embodiment, the second internal layer 23a and the second outer layer 23c is to use phase The lubrication elastomer of same high molecular material, including PTFE (Polytetrafluoroethylene, polytetrafluoroethylene (PTFE)).

Referring to Figure 20 and Figure 21, the second middle layer 23b is enhancement layer, and stainless steel tube or Nitinol pipe can be used It cuts, also Nitinol pipe, rest part can be used to use stainless steel tube in first segment.The second middle layer 23b is used To improve the axial support force, radial support power, binding force (adjacent circumferential expansion resistance) and the flexibility that include the outer sheath 23 Deng in during the withdrawing of heart valve 82 of intervention, providing enough binding forces and compress the intervention heart valve 82 In receiving to outer sheath 23.Secondly, the axial support force and flexibility that the second middle layer 23b is provided can make the outer sheath 23 With good bending property, so as to meet the different implantation sites of human body, realize that the intervention heart valve 82 is implanted into.

Specifically, the second middle layer 23b includes first segment 231, second segment 232 and third section 233.Described first Section 231, the second segment 232 and the third section 233 are sequentially connected, and the first segment 231 is close to the outer sheath 23 Distal end is arranged, and the third section 233 is arranged close to the proximal end of the outer sheath 23, and the second segment 232 is located at the first segment 231 and third section 233 centre.

Referring to Figure 20-Figure 25, the first segment 231 is using including engraved structure, so that the distal end tool of the outer sheath 23 Prepare enough enough radial elastic power and axial support force.The engraved structure is in rounding state along the radial direction of outer sheath 23.It is described to engrave The hollow-out parts of hollow structure may include diamond shape, rectangular and " drops " etc..

The first segment 231 includes multiple hollow-out units 2311.Multiple hollow-out units 2311 are along the first segment 231 Be circumferentially arranged setting, adjacent two hollow-out units 2311 are disconnected from each other in the circumferential distal end of the first segment 231. It can understand, it is described there are hollow out gap L between the circumferential direction of first segment 231 between the adjacent hollow-out unit 2311 The range of hollow out gap L is between 0.5mm-8mm.And since the first segment 231 is in the second internal layer 23a and second Between outer layer 23c, first segment 231 can comply with the second internal layer 23a and the second outer layer 23c and expand, because of NiTi after expansion Second middle layer 23b of compo pipe has shape memory function and promotes to reset, to considerably increase 23 distal end of outer sheath The toughness of radial support power；Meanwhile the hollow-out parts of engraved structure are in rounding state, to provide enough axial support forces, It effectively prevents when withdrawing the intervention heart valve 82, the occurrence of 23 distal end fold of the outer sheath；Secondly, week Make 23 distal end of the outer sheath that there is the flaring to the outer sheath adjacent circumferential expansion to hollow-out unit 2311 disconnected from each other, thus There is cushioning effect when recycling intervention heart valve 82 so that the release and recycling of the intervention heart valve 82 It is more smooth, while avoiding intervention 82 fold of heart valve.

In the present embodiment, the first segment 231 includes 4-6 hollow-out unit 2311.The hollow-out unit 2311 exists The circumferential direction setting disconnected from each other of the first segment 231.Circumferential even circumferential point of the hollow-out unit 2311 along first segment 231 Cloth.Axial direction and circumferential not closed diamond shape, the rectangle etc. of distal end are formed between two adjacent hollow-out units 2311 Space.

Referring to Figure 26, in other embodiments, the hollow-out unit 2311 in the circumferential direction of the first segment 231 is adjacent Two hollow-out units 2311 between can form one group of hollow-out unit 2311.And between two groups of adjacent hollow-out units 2311 The circumferential direction setting disconnected from each other of first segment 231.It is, of course, also possible to be to form one between 3 hollow-out units 2311 arranged successively Group hollow-out unit 2311, and in the circumferential direction setting disconnected from each other of first segment 231 between two groups of adjacent hollow-out units 2311.

Two adjacent hollow-out units 2311 are disconnected from each other in the circumferential distal end of the first segment 231.Adjacent Two hollow-out units 2311 are while the circumferential proximal end of the first segment 231 can interconnect or part connects It is connect with the second segment 232.

In other embodiments, two adjacent hollow-out units 2311 are in the circumferential close of the first segment 231 End is independently arranged mutually, and is connect respectively with the second segment 232, i.e.,：It is appreciated that in the present embodiment, adjacent two It is independently arranged mutually between a hollow-out unit 2311.

At least one hollow hole 2311b is offered in the hollow-out unit 2311, the hollow hole 2311b is along the hollow out Unit 2311 is axial from distally proximally extending.

Further, 2-4 hollow hole 2311b can be offered in the hollow-out unit 2311.Two adjacent hollow holes It interconnects or is not connected between 2311b, that is, setting is spaced between two adjacent hollow hole 2311b, described with reinforcement 2311 structural strength of hollow-out unit, so that hollow-out unit 2311 has enough axially and radially support forces.

In other real modes, opened up in the hollow-out unit 2311 there are two hollow hole 2311b, two hollow holes 2311b arranges along the axial of the hollow-out unit 2311 from distal end to proximal end；Or, two hollow hole 2311b are along institute State being circumferentially arranged for hollow-out unit 2311.In other embodiments, hollow hole there are three being opened up in the hollow-out unit 2311 2311b, three hollow hole 2311b can be in linear type, and the arrangement modes such as triangular shape are arranged in the hollow-out unit 2311 On.It is to be appreciated that the purpose that the arrangement mode of hollow hole 2311b and fabric hollow hole 2311b is arranged is intended to described in raising The overall construction intensity and flexibility of outer sheath, radial direction and axial support force.As long as and the outer sheath can be improved The arrangement of overall construction intensity can be carried out arranging in the present embodiment, therefore to hollow hole 2311b's in utility model Arrangement mode is not just restricted.

The hollow-out unit 2311 includes at least one hollow out segment 2311a.Offered on the hollow out segment 2311a to A few hollow hole 2311b.Adjacent hollow-out unit 2311 is divided mutually between the hollow out segment 2311a of its distalmost end From.Hollow out gap L described engraves hole unit 2311 along axially extending mark off of the hollow out segment 2311a.

Further, the arrangement mode of the hollow hole 2311b on the hollow out segment 2311a can refer to the hollow-out unit The arrangement mode of hollow hole 2311b on 2311, details are not described herein again.

40%-the 80% of 2311 area of hollow-out unit described in the area station of the hollow hole 2311b.Preferably, described to engrave 60%-the 70% of 2311 area of hollow-out unit described in the area station of emptying aperture 2311b.To in the second internal layer 23a, described When heating combination between the second middle layer 23b, the second outer layer 23c so that in the second middle layer 23b and described second The binding force bigger that adherence quality between layer 23a and the second outer layer 23c more preferably, between three layers combines, associativity is more It is good, further, axial support force, the radial support power of outer sheath 23 are improved, and make the outer sheath that there is enough flexible Property；Secondly, the area that hollow hole 2311b areas account for hollow-out unit 2311 is sufficiently large, is conducive to hollow out in heating cohesive process Gas discharge in the 2311b of hole, further increases between the second internal layer 23a, the second middle layer 23b, the second outer layer 23c Binding force, to enhance the overall construction intensity of the outer sheath 23.

The hollow hole 2311b is substantially in " drops ".When being set in the hollow-out unit 2311, there are two hollow hole 2311b When, substantially it is in figure of eight structure described in two.

Referring to Figure 20 and Figure 23, the distal end of the hollow-out unit 2311 is additionally provided with arc section 2311a₁.The arc section 2311a₁Arc to the distal end of the hollow-out unit 2311 protrude be arranged.The arc section 2311a₁With the hollow-out unit 2311 surround the hollow hole 2311b.Arc section 2311a₁With inner circle segmental arc and outer circle segmental arc, the half of the inner circle segmental arc Diameter ranging from 0.3mm-1mm, it is preferable that the radius of the inner circle segmental arc is 0.5-0.8mm；The radius of the outer circle segmental arc Ranging from 1mm-16mm, it is preferable that the radius of the outer circle segmental arc is preferred 0.6-3mm, further preferably 0.7- 2mm.The distal end of the grid ontology 2311a uses arc section 2311a₁Design not only effectively prevent intervention heart valve 82 return During removing, situations such as intervention heart valve 82 is punctured, torn by the distal end of first segment 231；Secondly, using arc section 2311a₁The radial support power that bigger can be provided makes the distal radial support force bigger of the outer sheath 23, to given an account of Enter to be more advantageous to during heart valve 82 is withdrawn and described compress the intervention heart valve 82.

Certainly in other embodiments, hollow hole, adjacent two institutes can be not provided in the hollow-out unit 2311 State the distal end disconnected from each other setting circumferential in the first segment 231 of hollow-out unit 2311.

The second segment 232 is to including the overall construction intensity and flexibility that improve the offer of outer sheath 23.Institute The axially and radially support force for stating second segment 232 is big than the axially and radially support force of the first segment 231, to carry For the binding force of bigger, to load the intervention heart valve 82.

The second segment 232 includes First Transition section 2321, bending section 2322 and the second changeover portion 2323.Described first Changeover portion 2321, the bending section 2322 and second changeover portion 2323 are from the distal end of second middle layer 22 to proximal end It is sequentially distributed.Second segment 232 between the First Transition section 2321 and the first segment 231 by connecting.The First Transition Multiple connecting hole 2321a are offered in section 2321.The gross area of the connecting hole 2321a accounts for the face of the First Transition section 2321 Long-pending 60-70%, to make to heat bonded area when combining between second segment 232 and the second internal layer 21a, the second outer layer 23c It maximizes, while improving the overall construction intensity of outer sheath 23, so that the outer sheath 23 is had flexibility, and have enough axis To and radial support power.

Preferably, the connecting hole 2321a includes round connecting hole 2321a, oval connection hole 2321a, rectangular connection Hole 2321a etc..In the present embodiment mode, multiple round connecting hole 2321a are offered in the First Transition section 2321.It is multiple Round connecting hole 2321a is distributed in the circumferential direction of the First Transition section 2321 evenly and at intervals.

The bending section 2322 increases the circumferential support force of the outer sheath 23 to provide, appropriate axially and radially props up Support force makes outer sheath 23 meet different implantation points and carries out to prevent the outer sheath 23 from bending or twisting together and overall flexibility Discharge the intervention heart valve 82.

Further, the bending section 2322 includes the spiral section 2322a being axially distributed along the bending section 2322.It is described Bending section 2322 is formed by helical cut.Spacing between the adjacent spiral section 2322a is t1, the bending section 2322 That upper spacing t1 is always t, and the t accounts for the 30-60% of total high (length) of the bending section 2322, and the preferably described t accounts for the bending The 40-50% of total high (length) of section 2322.To make to heat knot between bending section 2322 and the second internal layer 21a, the second outer layer 23c Bonded area when conjunction maximizes, and to make the outer sheath 23 have flexibility, and has enough axially and radially branch Support force.

In other embodiments, the bending section 2322 can be C-shaped circle, and the bending section 2322 is cut by C-shaped It is cut into C-shaped circle.It is spaced setting between two adjacent C-shaped circles, but does not turn off, i.e.,：Between two adjacent C-shaped circles mutually Connection.It is contacted by reinforcing rib 2322a between the C-shaped circle.It further, can be between the two neighboring C-shaped circle It is to be equally spaced, may not be and be equally spaced, is not restricted in the present embodiment.

Second changeover portion 2323 is to the connection between the bending section 2322 and the third section 233.Described Multiple connecting hole 2321a are offered on two changeover portions 2323.Multiple connecting hole 2321a are set, to make the second changeover portion Bonded area when combining is heated between 2323 and the second internal layer 21a, the second outer layer 23c to maximize, further, Improve outer sheath 23 overall construction intensity while, so that the outer sheath 23 is had flexibility, but have enough axial directions and Radial support power.

Preferably, in the present embodiment, second changeover portion 2323 offers multiple square attaching apertures 2321a.It is more A square attaching apertures 2321a is evenly spaced apart to be distributed in the circumferential direction of second changeover portion 2323.It will be appreciated, of course, that The square attaching apertures 2321a can not also compartment of terrain be distributed in the circumferential direction of second changeover portion 2323.

The third section 233 extends in the coupling tube 22.The third section 233 includes polylith floating piece 2331, institute Being provided at circumferentially spaced in the third section 233 of polylith floating piece 2331 is stated, every piece of floating piece 2331 offers multiple companies Meet hole 2321a.Herein, the polylith floating piece 2331, which is provided at circumferentially spaced, is conducive to described collapse the third section 233 In the coupling tube 22, meanwhile, multiple connecting hole 2321a are set on floating piece 2331 so that third section 233 and described second Bonded area when combining is heated between internal layer 21a, the second outer layer 23c to maximize, and further, improves outer sheath 23 Overall construction intensity.

In the present embodiment, when being loaded due to the intervention heart valve 82 can be softened to the cold by using Nitinol Characteristic compressed, to described in mixture of ice and water intervene 82 compression loaded of heart valve in the outer sheath 23. During the intervention heart valve 82 discharges in human body, intervention heart valve 82 is gradually from 23 distal end of the outer sheath Expansion.It is envisioned that comparing and mixture of ice and water, the temperature of human body is the temperature of significantly larger than mixture of ice and water, in release In the process, the intervention heart valve 82 is equivalent to is heated in human body, and the intervention heart valve 82 is in the outer sheath The expansionary force of 23 distal end is very big.When finding the position inaccuracy of the intervention release of heart valve 82, it is desirable to will be described Intervention heart valve 82 is re-compressed and is recycled in outer sheath 23, the outer sheath 23 just need sufficiently large axial direction to be offered, Radial support power is to compress the intervention heart valve 82.

In the present embodiment, by the way that the second middle layer 23b is arranged in the outer sheath 23, so that outer sheath 23 is described Associativity between second internal layer 23a, the second middle layer 23b and the second outer layer 23c is more preferable, improves outer sheath 23 Axial direction, the radial support power of entirety, while making outer sheath that there is certain flexibility, to which the intervention heart valve 82 recycles The sufficiently large axially and radially support force of offer in the process.

Hollow hole 2311b specifically, by the distal end of the second middle layer 23b be arranged first segment 231, described first Circumferential direction of the hollow-out unit 2311 in 231 distal end of first segment in section 231 detaches from each other, to make the remote of the outer sheath 23 It holds scalability more preferable, enough axially and radially support forces is provided simultaneously with, further, from the hollow-out unit 2311 The gross area of hollow hole 2311b accounts for the 40-80% of the area of the hollow-out unit 2311, it can be seen that in second internal layer When heating combination between 23a, the second middle layer 23b, the second outer layer 23c, the second middle layer 23b made and institute State the binding force bigger of adherence quality more preferably, between three layers between the second internal layer 23a and the second outer layer 23c, associativity It is more preferable, and then improve the axial support force of the outer sheath 23, radial support power, and it is enough soft so that the outer sheath is had Toughness.

The course of work of conveying device is described below.

First intervention heart valve 82 is compressed in mixture of ice and water, the loading section being loaded on the core-pipe subassembly 10 It 112 and is housed in epitheca 20.After intervention heart valve 82 is delivered to human lesion position, passes through operation handle 30 and control core 10 opposite segments epitheca 20 of tube assembly moves ahead, so that intervention heart valve 82 is unfolded in the self-expanding of the epitheca 20.

When ensuring that 82 releasing position of intervention heart valve is accurate, core-pipe subassembly 10 continues to move ahead, and intervenes heart valve 82 Release is deployed in lesion locations, and intervention heart valve 82 is made to be detached from gland 1111, completes the release of intervention heart valve 82.

If during release, it is found that the releasing position of intervention heart valve 82 is not right, core is controlled by operation handle 30 Tube assembly 10 is withdrawn, and epitheca 20 provides enough axially and radially support forces during withdrawing, and in the floating position-limiting The intervention heart valve 82 is compressed under the guiding of item 1112, intervention machinery 82 is housed in the epitheca 20, i.e., Complete the recycling of the intervention heart valve 82.

Following embodiment is illustrated mainly for the set-up mode of traction fiber and the structure improvement of operation handle, Related floating position-limiting item or other component may be used or in conjunction at least one of aforementioned each embodiments.

Referring to Figure 27, in the prior art, by taking the displacement of aorta petal as an example, in transport system after intervention heart valve loading Enter aorta 100 under the guiding of seeker 100, Anterior-arcuate-passage intervenes heart valve adjacent to the position of aorta petal 200 Before release under the package of the tube body 300 of sheath, position and the court of the aorta petal 200 of normal physiological structure are shown in Figure 27 To, curved sheath can be distally being adjusted using in the prior art, transport system distal end can be made to bend, the direction of seeker 400 Aorta petal 200.

Referring to Figure 28 a, due to lesion, certain special occasions may may require that transport system curved distal folding length degree increases, example If aorta petal 200 is towards change in Figure 28 a, transport system curved distal folding length degree is close to 270 degree, under this state, due to distal end Aorta petal stent length is longer and rigidity is not larger flexible, therefore implements to adjust using existing technology and means and curved be difficult Accomplish, the targeted tune of the present embodiment is curved, might not emphasize bending degree, it is preferred that emphasis is by the improvement of structure, keep tune curved It is more effortless convenient, degree of amplitude modulation range bigger.

The present embodiment uses outer sheath, including tube body 300, tube body 300 to have proximally and distally, 300 adjacent distal end of tube body The tube wall at position is also associated with traction fiber 800, and one end of traction fiber 800 extends to the proximal end of tube body 300, the other end, that is, adjacent tube The far-end of body 300, at least one section of outside for being free in tube body 300.In order to improve the connection of traction fiber 800 and tube body 300 Intensity avoids stress raisers, the end of traction fiber 800 from carrying a ring set 900, and the ring set 900 is around the home in the outer of tube body 300 In week, by the whole drawing tube body 300 of ring set 900, tube body 300 is valvular swollen for accommodating intervention at adjacent distal end position Swollen section, ring set 900 is in the distal side of expansion arc accordingly.

In Figure 28 a, since the present embodiment traction fiber 800 has the outside that one end is free in tube body 300, and traction fiber connects It is connected on the end position of sheath or is less than 3cm apart from end position, position of dissociating has larger degree of freedom, to a certain degree On can be detached from tube wall to maintain the effect tightened of drawing, the curved amplitude of tune of bigger, and operating handle can be obtained It is obviously improved.

In Figure 28 b, 300 outer wall of tube body of another embodiment is equipped with casing 1200, and non-free section of 800d is along casing 1200 Extend with the gap of tube body 300, is free section 800c in the opening position transition of casing 1200.

Relative to Figure 28 a, 300 outer wall of tube body of another embodiment is equipped with casing 1200, traction fiber 800 in Figure 28 c Extend along the gap of casing 1200 and tube body 300, is free section in the opening position transition of casing 1200, tube body 300 is closing on Distal site is to intervene valvular expansion arc for loading, and traction fiber 800 is connected to the middle part of expansion arc.

Relative to Figure 28 c, the traction fiber 800 of another embodiment is connected to the proximal lateral of expansion arc in Figure 28 d.

Referring to Figure 29, the present embodiment transport system, including outer sheath, the core-pipe subassembly that is placed in the tube body 300 of outer sheath And with the fixed operation handle of outer sheath and core-pipe subassembly proximal end, the proximal end of traction fiber 800 is connect with operation handle.

Core-pipe subassembly includes core pipe 500, and the distal end of core pipe 500 is fixed with seeker 400 and intervention heart valve gland 700, the position that core pipe 500 is in seeker 400 and intervenes between heart valve gland 700 is to intervene heart valve for placing The loading section of film, before release, the expansion arc of tube body 300, which is in, loads section periphery.

300 outside of tube body is equipped with casing 1200, axial sliding fit between the casing 1200 and tube body 300, traction fiber 800 Proximally extend via tube body 300 and the gap of casing 1200.

1200 distal end of casing is opening port, and traction fiber 800 extends the outside that tube body 300 is free in after the opening port, Until being connected on the ring set 900 of 3 distal end of tube body.In order to improve the intensity at opening port, reinforcing ring 1100 can be set, to prevent Opening port local laceration when only traction fiber 800 is tightened.

Referring to Figure 30, in another embodiment, 300 outside of tube body is equipped with casing 1200, the casing 1200 and tube body 300 Between axial sliding fit, traction fiber 800 proximally extends via tube body 300 and the gap of casing 1200.

Referring to Figure 31, relative to Figure 30, in another embodiment, traction fiber be two, respectively traction fiber 800a and Traction fiber 800b, traction fiber 800a and traction fiber 800b are connected with each other in distal end to a ring set structure, and ring set itself can be fixed In tube wall or inside tube wall.

Referring to Figure 32, relative to Figure 30, in another embodiment, ring set 900 is slightly proximally close, to prevent tube body 300 distal end splitting, the width in 900 axial direction of ring set is 1~5mm, substantially flat strip shaped after expansion.

In another embodiment, ring set is structure as a whole with traction fiber, i.e. traction fiber distal end itself coiling is annular, and And sealing is fixed.

The rotation of Figure 32 middle ring sleeves 900 is set on the outer wall of tube body 300 and axial limiting, the mode of axial limiting can adopt With the axial limiting slot or axial limiting part of tube wall.

Referring to Figure 33 and Figure 34, the distal end of tube body 300 is equipped with spacing ring 1700, and spacing ring can be tube body 300 itself Thickened area can also be and additionally be fixed on annular element, and 1700 periphery of spacing ring is equipped with axial limiting slot, and ring set 900 is rotatablely installed In axial limiting slot, ring set 900 can be directly caught in axial limiting slot by when installation using elastic deformation for cooperation, traction fiber company It is connected on ring set 900, when pulling traction fiber, if 300 posture of tube body is undesirable, i.e., impetus is not at desired turn The inside of folding part position, Forced rotation after side ring covers 900, until the connecting portion of traction fiber and ring set 900 turns to expected bending The inside that portion is, further force pulls at this time, or is preferably adjusted curved effect.

Referring to Figure 35, further include operation handle 1900 in Figure 36 the present embodiment transport systems, in the tube body 300 of outer sheath Slide outside is provided with casing 1200, and tube body 300 is internally provided with core-pipe subassembly 2100, and core-pipe subassembly 2100 distally extends outlet pipe Body 300 and be equipped with seeker 400.

Gap of the traction fiber 8 behind free one section of distal end between sleeve pipe 1200 and tube body 300 simultaneously extends proximally into Operation handle.

Referring to Figure 37, operation handle includes the fixed body 3000 of hollow-core construction, and fixed body 3000 is separate structure by two valves It fastens, fixed body 3000 is hollow structure, and tube body 300 and core-pipe subassembly 2100 pass through inside fixed body 3000.

300 side wall of fixed body carries the guide groove of hollow out, and drive link 2800, drive link are slidably fitted in fixed body 3000 2800 outer walls are fixed with linkage double wedge, and linkage double wedge extends guide groove, and 3000 outside rotation of fixed body is cased with control handle 2500, control handle 2500 be separate structure fastened by two valves, control handle 2500 with internal thread and with linkage double wedge Cooperation, the control rotation of handle 2500 can drive drive link 2800 to be axially moved, and tube body 300 passes through sheath pipe connections and drive link 2800 are connected, and are then driven by drive link 2800.

Drive link 2800 is also axially through structure, and core-pipe subassembly 2100 extends there through, and extends and connected to fixed body 3000 proximal end position.

3000 distal end of fixed body is installed with front end handle 2300, and the distal end of front end handle 2300 is equipped with front end cap body 2200, the proximal end of casing 1200 is connected on sliding seat 1200a, and sliding seat 1200a matches with the 2200 activity grafting of front end cap body It closes.Front end handle 2300 and front end cap body 2200 are that separate structure is fastened by two valves.

Sliding sleeve is equipped with traction piece 2700 and moving member 2600 to the outside of drive link 2800 respectively, wherein traction piece 2700 with lead Draw silk 800 to be connected, moving member 2600 sticks on the distal side of traction piece, and the axial direction equipped with hollow out is led on front end handle 2300 Slot, 2600 part of moving member extend axial channel, and external screw thread is equipped on the part extended, is turned on front end handle 2300 Dynamic to be equipped with adjusting knob 2400, adjusting knob 2400 is that separate structure is fastened by two valves, is rotated in adjusting knob 2400 Wall is equipped with the matched internal thread of external screw thread with moving member 2600.

Referring to Figure 38 to Figure 44, when needing to adjust curved, driving moving member 2600 is axially moved when adjusting knob 2400 rotates, after And driving traction fiber 800 to move by traction piece 2700,300 distal end of tube body is presented under the drive of traction fiber 800 shown in Figure 40 Flexuosity, angle M can adjust between 52~180 degree, and the axial stroke of traction piece 2700 can be between 1~30mm, i.e., When reaching range, angle M is minimum.

For the instruction turnover position when sheath tune is curved, traction fiber 800 is development section, section of developing in adjacent distal end part Length is 12~20cm, such as 15cm, and a proximal end at least step for section of developing under non-bending state extends partially into casing, Slightly bending can also pass through Medical Imaging System observation angle in this way.

The utility model embodiment is using heart valve bracket to be described made by implant, and those skilled in the art can be with Understand to be conveying device disclosed by the utility model can also set in addition to heart valve bracket using other implants as carrier Enter the corresponding position to body.Those skilled in the art the utility model can be carried out various modification and variations without departing from The spirit and scope of the utility model.These obvious modification and variations should all belong to the protection domain protection of the requires of the utility model It is interior.In addition, although having used some specific terms in this specification, these terms are merely for convenience of description, not right The utility model constitutes any specifically limited.

Claims (15)

1. a kind of valvular adjustable bending transport system of intervention, including outer sheath, being placed in the outer sheath can be axially opposing The core-pipe subassembly of sliding and the operation handle being connected with the outer sheath and core-pipe subassembly proximal end, which is characterized in that described outer The tube body of sheath have proximally and distally, the handle be connected with pull body distal end bending traction fiber, traction fiber distal end with The distal end that tube body connects and connects socket part position at or adjacent to tube body, at least one section of the traction fiber are to be free in outside tube body Free section；

Seeker and gland are fixed on the core-pipe subassembly, wherein seeker is fixed on core-pipe subassembly distal end, core-pipe subassembly Gland is extended in proximal lateral, is intervention heart valve installation position between seeker and gland；The outer sheath is in intervention The periphery of heart valve installation position；

It is additionally provided with floating position-limiting item, the proximal end of the floating position-limiting item is the starting being fixedly installed relative to gland or core-pipe subassembly End, floating position-limiting item float between intervention heart valve installation position and outer sheath；

The outer wall of the gland be equipped with for intervene the valvular matched positioning region of engaging lug, the engaging lug quilt Before releasing outer sheath completely, the floating position-limiting item is fettered the cooperation kept between engaging lug and positioning region by outer sheath.

2. intervening valvular adjustable bending transport system as described in claim 1, which is characterized in that the positioning region is fixed Position plush copper, after the loading, the engaging lug is set in positioning plush copper the intervention heart valve, and the engaging lug is released completely Before releasing outer sheath, the floating position-limiting item is laminated on engaging lug to keep the cooperation between engaging lug and positioning region.

3. intervening valvular adjustable bending transport system as described in claim 1, which is characterized in that the positioning region is fixed Position slot, after the intervention heart valve loads, engaging lug is inlaid in corresponding locating slot, and the engaging lug is completely released out Before outer sheath, the floating position-limiting item is laminated on engaging lug to keep the cooperation between engaging lug and positioning region.

4. intervening valvular adjustable bending transport system as described in claim 1, which is characterized in that intervention heart valve dress After load, the floating position-limiting distal head is axially at least laminated on engaging lug.

5. intervening valvular adjustable bending transport system as described in claim 1, which is characterized in that the end of the traction fiber Portion carries a ring set, and the ring set is around the home in the periphery of tube body；The ring set is fixed on the outer wall of tube body, or rotation is set in tube body Outer wall on and axial limiting.

6. intervening valvular adjustable bending transport system as described in claim 1, which is characterized in that the pipe of the outer sheath Be equipped with casing outside body, axial sliding fit between the casing and tube body, the traction fiber via the gap of tube body and casing to Proximal end extends.

7. intervening valvular adjustable bending transport system as claimed in claim 6, which is characterized in that the operation handle packet It includes：

The fixed body of hollow-core construction；

It is slidably mounted on the traction piece connecting in fixed body and with the traction fiber；

The driving mechanism for driving traction piece to move on fixed body；

The control mechanism for driving outer sheath to move on fixed body.

8. intervening valvular adjustable bending transport system as claimed in claim 7, which is characterized in that the driving mechanism packet It includes：

The moving member for the force that axially offsets with the traction piece；

It is set on fixed body and around the adjusting knob of fixed body axial rotation, the adjusting knob is tubular and is in moving member Periphery, screw-thread fit between adjusting knob and moving member；

The distal side fixing sleeve of the fixed body is equipped with front end handle, and the axial channel of hollow out is equipped on the handle of front end, described A part for moving member extends the axial channel, and external screw thread is equipped on the part extended, and adjusting knob is internally provided with phase The internal thread of cooperation.

9. intervening valvular adjustable bending transport system as claimed in claim 8, which is characterized in that the control mechanism packet It includes：

The control handle being rotatably installed in outside fixed body, and the inner wall for controlling handle carries internal thread；

It is slidably mounted on the drive link in fixed body along fixed body axis, is equipped on drive link and matches with control handle internal thread The linkage double wedge of conjunction, the tube body of the outer sheath are connected with drive link；

The fixed body is equipped with the guide groove for guiding the linkage double wedge to be axially moved；

The traction piece is loop configuration, and the drive link sliding penetrates through the central area of traction piece；

The moving member is loop configuration and sticks on the distal side of traction piece, and the drive link sliding penetrates through in traction piece Heart district domain.

10. intervening valvular adjustable bending transport system as described in claim 1, which is characterized in that the outer sheath by Interior and outer successively including internal layer, middle layer and outer layer, the middle layer includes first segment, second segment successively by distal end to proximal end And third section, the first segment are engraved structure, the engraved structure includes at least two hollow-out units, adjacent two institutes State distal end disconnected from each other setting of the hollow-out unit in first segment circumferential direction.

11. the valvular adjustable bending transport system of intervention according to claim 1, which is characterized in that adjacent two The hollow-out unit is equipped with hollow out gap between the distal end of first segment circumferential direction, and the range of the hollow out gap L exists Between 0.5mm-8mm.

12. the valvular adjustable bending transport system of intervention according to claim 1, which is characterized in that adjacent two The hollow-out unit is disconnected from each other between the distal end of first segment circumferential direction, is interconnected in the proximal end of first segment circumferential direction Or it is independent mutually, and connect with the second segment.

13. the valvular adjustable bending transport system of intervention according to claim 1, which is characterized in that the hollow out list Offer at least one hollow hole in member, the hollow hole is axial from distally proximally extending along the hollow-out unit.

14. the valvular adjustable bending transport system of intervention according to claim 13, which is characterized in that the hollow hole Area accounts for the 40%-80% of the hollow-out unit area.

15. the valvular adjustable bending transport system of intervention according to claim 13, which is characterized in that the hollow out list The distal end of member is equipped with arc section, the distal end protrusion setting of hollow-out unit described in the arcuate directions of the arc section.