CN104352261A - Plugging device for left auricle - Google Patents

Abstract

The invention discloses a plugging device for a left auricle. The plugging device comprises a plugging disc, a connecting disc and an anchoring disc, wherein the plugging disc and the connecting disc are respectively formed by weaving nickel-titanium alloy wires and conducting heat treatment on the nickel-titanium alloy wires to form a disc-shaped structure; the diameter of the connecting disc is approximate to that of the anchoring disc; when the connecting disc is unfolded, the connecting disc provides supporting for the anchoring disc to stabilize the fixation of the anchoring disc inside the left auricle; the anchoring disc comprises a central end part connected with the connecting disc and a plurality of support rods connected with the central end part. The plugging device for the left auricle disclosed by the invention is used for blocking the left auricle, is high in effect of blocking blood clots inside the left auricle from flowing out, can be repeatedly positioned, is fixedly stable, and is resistant to fatigue.

Description

Occluder for left auricle

Technical field

The present invention relates to a kind of inaccessible left auricle, blocking thrombosis in left auricle, to flow out effect good, can resetting, fixing-stable, fatigue proof occluder for left auricle.

Background technology

At present, along with the development of intervention apparatus, curing the disease that many surgical operations cannot be treated obtains treatment.These treatments of curing the disease are relative to operating Therapeutic Method, and the wound of intervenient cure is little, and recover fast, curative effect is good.Through semicentennial development nearly, intervenient cure obtains swift and violent development, also creates various interventional medical device product.Make more and more to cure the disease and patient obtain medical treatment.

Atrial fibrillation (atrial fibrillation) is one of modal arrhythmia, except the discomfort that cardiopalmus symptom is brought, the complication such as thromboembolism be the topmost harm of atrial fibrillation.In non-valvular and non-nonrheumatic atrial fibrillation patient, the thrombus source of about 90% is from left auricle.About there is 5% patients with atrial fibrillation generation thromboembolic events and apoplexy every year.And the fatality rate that apoplexy causes is up to 50%.Therefore, the apoplexy that how prevention and therapy atrial fibrillation thrombosis causes has important clinical meaning.The method of current prevention and therapy atrial fibrillation thrombosis has surgical operation, Drug therapy and interventional therapy method.The wherein inaccessible left auricle of surgical method, because the reasons such as its wound is large, risk is high are not widely used.At present, the most general method that atrial fibrillation patient prevents the method for apoplexy to have is Long-term Oral anticoagulation medicine, but anticoagulation medicine has and causes hemorrhage risk, about has the patient of 14% ~ 44% cannot accept long-term agents anticoagulant therapy because there is contraindication.Recent domestic has developed a kind of state-of-the-art intervenient cure, is implanted in left auricle, inaccessible left auricle by tiny conduit by special occluder for left auricle, prevention and therapy patients with atrial fibrillation generation Cardioversion and apoplexy.This Therapeutic Method wound is little, and risk is low, and recover fast, curative effect is good, thus becomes the Therapeutic Method of the apoplexy first-selection that prevention and therapy atrial fibrillation causes.

Such apparatus is from structure at present, substantially can be divided into Weaving type, cutting-type and mixed type.Stopper can be sent in left auricle by the method for intubation intervention by the occluder for left auricle of these types, realizes left atrial appendage occlusion.But all there is suitable limitation.Everyone left auricle anatomical structure is complicated, different, has ellipticity, peanut shape etc.Left auricle inwall is uneven, out-of-shape, and left auricle wall is thin.So be difficult to neither piercing through heart wall, can be firmly anchored in left auricle again and do not come off, finally reach desirable plugging effect.

Weaving type occluder for left auricle designed by patent of invention CN200610037789 and CN200580002183.They utilize the rough structure on the fixed disk surface of stopper to carry out grappling stopper, and shutoff dish, in the shutoff of left auricle mouth, reaches inaccessible effect.The design advantage of this structure is that structure is simple, and difficulty of processing is little, and cost is low.But the grappling dynamics of the fixed disk of braiding is lower, be difficult to adapt to different left auricle form.Even if sew up grappling hook on fixed disk, be still difficult to thrust in left auricle wall when fixed disk is squeezed distortion, realize stable fixing.And fixed disk is squeezed after distortion and can affects the shape of shutoff dish in left auricle, cause plugging effect not good.

Cutting-type occluder for left auricle involved by patent of invention CN200410059976 and CN99815453.Nickel-titanium metal pipe cuts by they, the shape designed by heat-treating profiled one-tenth.Be designed with the grappling outwards tilted to sting at the position with left auricle contact internal walls, thrust left auricle inwall, realize stable fixing.Usually on the grid framework of cutting-type, be sewed with choked flow film, realize the effect of left atrial appendage occlusion.The advantage of this structural design is, whole stopper is one-body molded, and rigidity is comparatively strong, easily fixes at left auricle inwall, and designed grappling thorn easily thrusts in left auricle inwall, stable fixing, prevents stopper from coming off.But cutting-type occluder for left auricle in shape deformability is limited, different left auricle form cannot be adapted to, its use is very restricted.Cutting-type occluder for left auricle is after plug is as left auricle, and the part in left atrium can cave in than being formed with atrial walls usually, forms new " left auricle " region, increases new thrombotic risk.The grappling thorn of cutting-type occluder for left auricle normally stabs left atrium, plays stable stopper, prevents stopper from coming off.But the grappling thorn stabbing left atrium, in resetting, can be stuck in sheath tube wall edge when reclaiming stopper, make stopper to reclaim, carry out resetting.

Mixed type occluder for left auricle involved by patent of invention CN201110146287 and CN103099652A.Shutoff dish adopts the pattern of braiding in the designs, usually in shutoff dish, is sewed with choked flow film, for inaccessible left auricle.And fixed disk has nickel-titanium metal pipe to cut, the shape designed by heat-treating profiled one-tenth.Be designed with the grappling outwards tilted to sting at the position with left auricle contact internal walls, thrust left auricle inwall, realize stable fixing.Mixed type occluder for left auricle effectively solves most of problem of cutting-type occluder for left auricle.But as a grappling thorn of fixed disk normally stabs left atrium in CN103099652A, play stable stopper, prevent stopper from coming off.But the grappling thorn stabbing left atrium, in resetting, can be stuck in sheath tube wall edge when reclaiming stopper, make stopper to reclaim, carry out resetting.And the usual deformation of fixed disk of this mixed type occluder for left auricle is comparatively large, to overturn the direction of grappling thorn, the tension force of fixed disk and deformation quantity is caused to reach the ultimate value of material.The fatigue strength of this apparatus in Permanent implantation is poor, easily ruptures, and punctures its hetero-organizations such as heart, threat to life.

Therefore, the pluses and minuses of comprehensive various occluder for left auricle, develop a kind of can effective inaccessible left auricle, can resetting, stable fixing, can the occluder for left auricle of Permanent implantation.

Therefore, need a kind of inaccessible left auricle badly, blocking thrombosis in left auricle, to flow out effect good, can resetting, fixing-stable, fatigue proof occluder for left auricle.

Summary of the invention

The object of this invention is to provide a kind of occluder for left auricle, blocking thrombosis in left auricle, to flow out effect good, can resetting, fixing-stable, fatigue proof occluder for left auricle.

To achieve these goals, technical scheme provided by the invention is: provide a kind of occluder for left auricle, it is characterized in that, comprise: shutoff dish, terminal pad and anchor disk, described shutoff dish and terminal pad all adopt nitinol alloy wire to weave, through being heat-treated to formation disk-like structure, for playing the effect of shutoff, PTFE or PET choked flow film can be sewed up on shutoff dish.For reducing choked flow film surface thrombosis originality, accelerate shutoff panel surface endothelialization.Such choked flow film can adopt electrostatic spinning to spin, and forms through low-temperature plasma surface active.PTFE or PET choked flow film can be sewed up on terminal pad, stop the outflow of thrombosis in left auricle.The diameter of described terminal pad is close to the diameter of described anchor disk, when described terminal pad launches, described terminal pad provides support to anchor disk, to stablize fixing in left auricle of described anchor disk, described anchor disk comprises the support bar that the central end that is connected with described terminal pad and Duo Gen are connected with described central end.

Described support bar being also provided with the cavity for sewing up PTFE or PET choked flow film in anchor disk, stoping the outflow of thrombosis in left auricle.For the cross-fire shape of stable support bar arranges, described support bar has crossover sites, and described crossover sites arranges limiting component.Not only guarantee that support bar becomes cross-fire to arrange, support bar can also be avoided to tangle together in put procedure.

Described support bar can in shaft-like, branch-like or latticed, the end of described support bar can be interior bending, flexure spring shape or spherical, described support bar sends from the side of central end circle, crosses over the offside of center to this circle of described central end, and many described support bars are together in intersecting radial arrangement, wherein at least one described support bar is arranged at least one grappling thorn, described grappling thorn is towards described shutoff dish.

The number of described support bar should be odd number.

The length of described anchor disk thorn is 0.5-4 millimeter.

Also comprise push rod, the threaded one end of described shutoff dish connects described push rod, and multiple tinsel is equipped with in one end of described shutoff dish, the end that described tinsel has volume larger, this end can be stuck between the connector of push rod, and described shutoff dish and described push rod are for flexibly connecting.

Described anchor disk is cut by NiTi pipe, and heat-treating profiled mode is made.

Described anchor disk is woven by titanium-nickel wire, and heat-treating profiled mode is made.

Support bar is one by one through in the stopper slot of described limiting component after intersecting, and described limiting component is fixed in described anchor disk through welding or punching press.

Described support bar utilizes cut to go out grappling thorn, die & mold treatment is utilized to finalize the angle of grappling thorn, described grappling stabs outer opening, towards the direction of described shutoff dish, and the root of described grappling thorn is on described support bar, described grappling thorn outwards opens automatically when not being stressed, and during compression, described grappling thorn can be recycled on described support bar, and the end of described support bar is in the shape that curves inwardly.

Described shutoff dish is woven into woven mesh structure by titanium-nickel wire, and through being heat-treated to plate-like, and two ends are fixed by steel bushing, and one end of described shutoff dish is connected with terminal pad steel bushing; Described terminal pad is also be woven into mesh grid by titanium-nickel wire, and through being heat-treated to plate-like, and two ends are fixed by steel bushing.

Compared with prior art:

Occluder for left auricle of the present invention, described anchor disk structural deformation is soft, and stable, the fatigue performance of Permanent implantation is splendid, can adapt to the left auricle cavity of various form and size;

The present invention designs for syllogic, can adapt to the left auricle cavity of various form and size;

It is firm that the present invention can possess grappling simultaneously, and effective inaccessible left auricle;

The present invention can resetting.If place poor effect in some cases, do not free the situation of push rod, the present invention can regained in sheath pipe, resetting and placement, until reach satisfied grappling and inaccessible effect, greatly reduce operation risk.

The present invention can use less induction system, reduces operation process conveyer device further to the damage of blood vessel.

Flexibly connect between occluder for left auricle of the present invention and push rod, greatly reduce the tension force that in operation process, push rod applies the present invention, the position that the present invention is placed is more accurate.

By following description also by reference to the accompanying drawings, the present invention will become more clear, and these accompanying drawings are for explaining embodiments of the invention.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of an embodiment of left auricle holder of the present invention.

Fig. 2 is the schematic diagram of occluder for left auricle as shown in Figure 1.

Fig. 3 is the block schematic illustration of the another kind of form of expression of occluder for left auricle as shown in Figure 1.

Fig. 4 is the block schematic illustration of the second embodiment of occluder for left auricle of the present invention.

Fig. 5 is the schematic diagram of three embodiments of left auricle holder of the present invention.

Fig. 6 a is the top view of an embodiment of the shutoff dish of occluder for left auricle of the present invention.

Fig. 6 b is the front view of an embodiment of the shutoff dish of occluder for left auricle of the present invention.

Fig. 7 a is the top view of an embodiment of the terminal pad of occluder for left auricle of the present invention.

Fig. 7 b is the front view of an embodiment of the terminal pad of occluder for left auricle of the present invention.

Fig. 8 a is the front view of an embodiment of the anchor disk of occluder for left auricle of the present invention.

Fig. 8 b is the axonometric chart of an embodiment of the anchor disk of occluder for left auricle of the present invention.

The anchor disk of Fig. 9 a the present invention occluder for left auricle as shown in Figure 1 has just gone out the view of sheath pipe.

The half of the anchor disk of Fig. 9 b the present invention occluder for left auricle as shown in Figure 1 goes out the view of sheath pipe.

The anchor disk of Fig. 9 c the present invention occluder for left auricle as shown in Figure 1 goes out the view of sheath pipe completely.

The limiting component schematic perspective view of the anchor disk crossover sites of Figure 10 the present invention occluder for left auricle as shown in Figure 1.

The limiting component of the anchor disk crossover sites of Figure 11 occluder for left auricle of the present invention and the assembling enlarged diagram of anchor disk.

The position view of Figure 12 occluder for left auricle of the present invention in left auricle anatomical structure.

Figure 13 a is the connection diagram of occluder for left auricle of the present invention and push rod.

Figure 13 b be occluder for left auricle of the present invention and push rod free schematic diagram.

The connector three-dimensional view of the push rod of Figure 14 occluder for left auricle of the present invention.

Detailed description of the invention

With reference now to accompanying drawing, describe embodiments of the invention, element numbers similar in accompanying drawing represents similar element.

Embodiment 1:

As Fig. 1, shown in Fig. 2 and Fig. 3, occluder for left auricle involved in the present invention includes shutoff dish 11, the terminal pad 22 be connected with shutoff dish 11 and the anchor disk 33 be connected with terminal pad 22, wherein as shown in Figure 6, shutoff dish 11 is woven into woven mesh structure with titanium-nickel wire, through being heat-treated to plate-like, two ends steel bushing 111 is fixed, one end of shutoff dish 11 is connected with terminal pad 22 steel bushing 111, the other end is provided with screw thread or as Figure 13 a, there is more than 121, the tinsel of bulb one end shown in 13b, be connected with the push rod 122 of conveyer device, the connector 123 of push rod 122 as shown in figure 14, there is depression 124 end of connector 123, when connecting shutoff dish 11 and one end male cooperation of shutoff dish 11, there are multiple rectangular recess 125 and ball recess 126 in the outer of connector 123, and rectangular recess 125 is communicated with ball recess 126, after being pressed into the groove of connector 123 by there being the tinsel 121 of bulb, the sleeve pipe 127 coordinated with it with one blocks, play the effect of connection, when freeing, sleeve pipe 127 is dropped back, tinsel 121 ejects rectangular recess 125 and frees with push rod 122, as shown in Fig. 7 a and Fig. 7 b, same, terminal pad 22 is also be woven into woven mesh structure with titanium-nickel wire, through being heat-treated to plate-like, two ends steel bushing 221 is fixed, and the diameter of terminal pad 22 is suitable with anchor disk 33, is in the inside of anchor disk 33, can play a supporting role to the support bar 331 of anchor disk 33 in the outer 222 of terminal pad 22, shutoff dish 11 and terminal pad 22 inside are sewed with PFTE or PET choked flow film respectively.As shown in Fig. 8 a, Fig. 8 b, anchor disk 33 is the many support bars 331 with a NiTi pipe cutting, uses mould through being heat-treated to the shape shown in figure.The central end 332 of anchor disk 33 is connected with terminal pad 22 through welding.

In embodiment 1, although support bar 331 has 9, according to the requirement of actual mechanical property and specification, the quantity of support bar 331 can be changed.These nine support bars 331 send from the side of central end 332 circle, cross over the offside of center to this circle of central end 332, and in bending, many support bars 331 are together in intersecting radial arrangement, support bar 331 can also being provided with cavity 333 for sewing up PTFE or PET choked flow film in anchor disk 33, stoping the outflow of thrombosis in left auricle.As shown in Figure 10 and Figure 11, for the cross-fire shape of stable support bar 331 arranges, crossover sites can be provided with limiting component 334, not only guarantee that support bar 331 one-tenth cross-fire arranges, support bar 331 can also be avoided to tangle in put procedure together, the stopper slot 335 of support bar 331 one by one through limiting component 334 after intersecting, limiting component 334 is fixed in anchor disk 33 through welding or punching press, on support bar 331, utilize cut to go out grappling and sting 336 shapes, die & mold treatment is utilized to finalize the angle of grappling thorn 336, this grappling thorn 336 outwards opens, towards the direction of shutoff dish 11, the root of grappling thorn 336 is on support bar 331, grappling thorn 336 outwards opens automatically when not being stressed, during compression, this grappling thorn 336 can be recycled on support bar 331, the end 337 of support bar 331 curves inwardly shape.

As shown in Fig. 9 a, 9b, 9c, anchor disk 33 is entering sheath pipe 44 and process out has following features from sheath pipe 44: in order to clear explanation anchor disk 33 pass in and out the process of sheath pipe, Fig. 9 a, in Fig. 9 b and Fig. 9 c, the support bar 331 of anchor disk 33 is reduced to two, support bar 331 is straightened and cross-shaped in sheath pipe, and the contrary oblique inner side direction of 336 places towards central end 332 is stung in grappling.Can not scratch sheath inside pipe wall in propelling movement process in sheath pipe 44.As illustrated in fig. 9, under the thrust of push rod 122, the elbow 337 of the end of support bar 331 slowly releases sheath pipe 44, launches along direction A.As shown in figure 9b, continue to push push rod 122, support bar 331 continues along direction A deployed condition.Now, grappling thorn 336 upset about 90 degree, close perpendicular to push rod 122.Push rod 122 continues to apply propelling movement power, anchor disk 33 is released sheath pipe 44 completely, support bar 331 continues to launch to be as Fig. 9 c state along direction A, now, anchor disk 33 is launched completely, grappling thorn 336 overturns about 90 degree again, be in outside anchor disk 33, towards the oblique lateral direction of central end 332, stab left auricle inwall, be fixed on left auricle intracavity, after this, terminal pad 22 launches in the below of anchor disk 33, the left auricle cavity flexibly connecting to adapt to various form of shutoff dish 11 and anchor disk 33 is not only provided, also support bar 331 support force can be given, stablize anchor disk 33 fixing in left auricle further.Process when reclaiming anchor disk 33 is contrary with each stage of process that anchor disk 33 releases sheath pipe 44, sheath pipe 44 drawn in by the pushed bar 122 of anchor disk 33, outstanding feature is, grappling thorn 336 overturns towards the contrary direction, oblique inner side of central end 332 by when launching towards the oblique lateral direction of central end 332, and this process guarantees that grappling thorn 336 also can not enter sheath pipe 44 by scratch left auricle wall smoothly.The occluder for left auricle of the present embodiment can not only ensure anchor disk 33 in left auricle can resetting function, also greatly reduce the damage of apparatus to left auricle wall, reduce risk and the complication of operation.

Embodiment 2:

As shown in Figure 4, occluder for left auricle of the present invention comprises shutoff dish 11, the terminal pad 22 be connected with shutoff dish 11 and the anchor disk 33 be connected with terminal pad 22, shutoff dish 11 and the terminal pad 22 be connected with shutoff dish 11 adopt unitary design, titanium-nickel wire is adopted to be woven into woven mesh structure, two ends steel bushing 111 is fixed, through being heat-treated to double disk structure, more tiny waist 128 is had between shutoff dish 11 and terminal pad 22, one end of terminal pad 22 connects anchor disk 33, as shown in Figure 13 a and 13b, the other end of shutoff dish 11 is provided with screw thread, there is more than 121, the tinsel of bulb one end, be connected with the push rod 122 of conveyer device, shutoff dish 11 and terminal pad 22 inside are sewed with PFTE or PET choked flow film respectively, anchor disk 33 is the many support bars 331 with a NiTi pipe cutting, use mould through being heat-treated to the shape shown in figure.The support bar 331 of anchor disk 33 sends from the side of central end 332 circle, crosses over the offside of center to this circle of central end 332, and in bending, many support bars 331 are together in intersecting radial arrangement.Support bar 331 can also being provided with cavity 333 for sewing up PTFE or PET choked flow film in anchor disk 33, stoping the outflow of thrombosis in left auricle.As shown in Figure 10 and Figure 11, for the cross-fire shape of stable support bar 331 arranges, crossover sites can be provided with limiting component 334.Not only guarantee that support bar 331 one-tenth cross-fire arranges, support bar 331 can also be avoided to tangle together in put procedure.Support bar 331 is one by one through in the stopper slot 335 of limiting component 334 after intersecting, and limiting component 334 is fixed in anchor disk 33 through welding or punching press.On support bar 331, utilize cut to go out grappling and sting 336 shapes, utilize die & mold treatment to finalize the angle of grappling thorn 336.This grappling thorn 336 outwards opens, and towards the direction of shutoff dish 11, the root of grappling thorn 336 is on support bar 331, and grappling thorn 336 outwards opens automatically when not being stressed, and during compression, this grappling thorn 336 can be recycled on support bar 331.The end 337 of support bar 331 curves inwardly shape.

Embodiment 3:

As Fig. 5, shown in 6a and 6b, occluder for left auricle involved in the present invention includes shutoff dish 11, the terminal pad 22 be connected with shutoff dish 11 and the anchor disk 33 be connected with terminal pad 22, shutoff dish 11 and the terminal pad 22 be connected with shutoff dish 11 adopt unitary design, titanium-nickel wire is adopted to be woven into woven mesh structure, two ends steel bushing 111 is fixed, through being heat-treated to T-shaped dish structure, two ends indent forms the elastomer with elasticity and retractility, one end of terminal pad 22 connects anchor disk 33, the other end of shutoff dish 11 is provided with screw thread or as Figure 13 a, shown in 13b one end have more than 121, the tinsel of bulb, be connected with the push rod 122 of conveyer device, shutoff dish 11 and terminal pad 22 inside are sewed with PFTE or PET choked flow film respectively, anchor disk 33 is the many support bars 331 with a NiTi pipe cutting, use mould through being heat-treated to the shape shown in figure.The support bar 331 of anchor disk 33 sends from the side of central end 332 circle, crosses over the offside of center to this circle of central end 332, and in bending, many support bars 331 are together in intersecting radial arrangement.Support bar 331 can also being provided with cavity 333 for sewing up PTFE or PET choked flow film in anchor disk, stoping the outflow of thrombosis in left auricle.As shown in Figure 10 and Figure 11, for the cross-fire shape of stable support bar 331 arranges, crossover sites can be provided with spacing 334 parts.Not only guarantee that support bar 331 one-tenth cross-fire arranges, support bar 331 can also be avoided to tangle together in put procedure.Support bar 331 is one by one through in the stopper slot 335 of limiting component 334 after intersecting, and limiting component 334 is fixed in anchor disk 33 through welding or punching press.On support bar 331, utilize cut to go out grappling and sting 336 shapes, die & mold treatment is utilized to finalize the angle of grappling thorn 336, this grappling thorn 336 outwards opens, towards the direction of shutoff dish 11, the root of grappling thorn 336 is on support bar 331, and grappling thorn 336 outwards opens automatically when not being stressed, and during compression, this grappling thorn 336 can be recycled on support bar 331.The end of support bar 331 forms bulb 338 after hot melt, to reduce the risk of stabbing tissue.

As shown in figure 12, the placement schematic diagram of occluder for left auricle of the present invention in the left auricle LAA of left atrium LA.Occluder for left auricle of the present invention has the terminal pad 22 of elasticity and retractility, makes anchor disk 33 can be placed on darker or more shallow position according to clinical needs.

In sum, occluder for left auricle of the present invention includes shutoff dish, terminal pad and anchor disk, there is good elasticity and inaccessible performance, this stopper overall structure good stability, can resetting, grappling is firm, various left auricle form can be adapted to, reduce operating difficulty and the damage to tissue, this stopper comprise there is favorable elasticity and in be sewed with the shutoff dish of choked flow film, its shutoff dish has elastic terminal pad by one or connection segment one, this terminal pad has good deformability, this occluder for left auricle is made to adapt to various left auricle form, the anchor disk be connected with terminal pad, there is multiple support bar, integrally-built stability is good.The support bar of this anchor disk there is grappling to sting, 180 degree of upsets can be done with support bar to offside, greatly strengthen the anchoring ability of grappling thorn, reduce grappling thorn to the damage of tissue, make this stopper have the function of resetting.This support bar strides across the structural design of center curvature to offside, and the deformation of support bar is little, and stress is little, reduces the risk that fracture occurs Permanent implantation, also makes occluder for left auricle of the present invention use less induction system.

Therefore, the present invention has the following advantages:

Occluder for left auricle of the present invention, described anchor disk structural deformation is soft, and stable, the fatigue performance of Permanent implantation is splendid, can adapt to the left auricle cavity of various form and size;

The present invention designs for syllogic, can adapt to the left auricle cavity of various form and size;

It is firm that the present invention can possess grappling simultaneously, and effective inaccessible left auricle;

The present invention can resetting.If place poor effect in some cases, not freeing the situation of conveying push rod, the present invention can be regained in sheath pipe, resetting and placement, until reach satisfied grappling and inaccessible effect, greatly reducing operation risk.

The present invention can use less induction system, reduces operation process conveyer device further to the damage of blood vessel.

Flexibly connect between occluder for left auricle of the present invention and push rod, greatly reduce the tension force that in operation process, push rod applies the present invention, the position that the present invention is placed is more accurate.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent to substitute and improvement etc., all should be included within protection scope of the present invention.Above disclosedly be only the preferred embodiments of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the present patent application the scope of the claims is done, still belong to the scope that the present invention is contained.

Claims (11)

1. an occluder for left auricle, it is characterized in that, comprise: shutoff dish, terminal pad and anchor disk, described shutoff dish and terminal pad all adopt nitinol alloy wire to weave, through being heat-treated to formation disk-like structure, the diameter of described terminal pad is close to the diameter of described anchor disk, when described terminal pad launches, described terminal pad provides support to anchor disk, to stablize fixing in left auricle of described anchor disk, described anchor disk comprises the support bar that the central end that is connected with described terminal pad and Duo Gen are connected with described central end.

2. occluder for left auricle as claimed in claim 1, it is characterized in that: described support bar can in shaft-like, branch-like or latticed, the end of described support bar can be interior bending, flexure spring shape or spherical, described support bar sends from the side of central end circle, cross over the offside of center to this circle of described central end, many described support bars are together in intersecting radial arrangement, wherein at least one described support bar is arranged at least one grappling thorn, described grappling thorn is towards described shutoff dish.

3. occluder for left auricle as claimed in claim 1, is characterized in that: described support bar is also provided with the cavity for sewing up PTFE or PET choked flow film in anchor disk, described support bar has crossover sites, and described crossover sites arranges limiting component.

4. occluder for left auricle as claimed in claim 1 or 2, is characterized in that: the number of described support bar should be odd number.

5. occluder for left auricle as claimed in claim 1, is characterized in that: the length of described anchor disk thorn is 0.5-4 millimeter.

6. occluder for left auricle as claimed in claim 3, it is characterized in that: also comprise push rod, the threaded one end of described shutoff dish connects described push rod, multiple tinsel is equipped with in one end of described shutoff dish, the end that described tinsel has volume larger, this end can be stuck between the connector of push rod, and described shutoff dish and described push rod are for flexibly connecting.

7. the occluder for left auricle as described in claim 1 or 5, is characterized in that: described anchor disk is cut by NiTi pipe, and heat-treating profiled mode is made.

8. the occluder for left auricle as described in claim 1 or 5, is characterized in that: described anchor disk is woven by titanium-nickel wire, and heat-treating profiled mode is made.

9. the occluder for left auricle as described in claim 1 or 5, is characterized in that: support bar is one by one through in the stopper slot of described limiting component after intersecting, and described limiting component is fixed in described anchor disk through welding or punching press.

10. occluder for left auricle as claimed in claim 4, it is characterized in that: described support bar utilizes cut to go out grappling thorn, die & mold treatment is utilized to finalize the angle of grappling thorn, described grappling stabs outer opening, towards the direction of described shutoff dish, and the root of described grappling thorn is on described support bar, and described grappling thorn outwards opens automatically when not being stressed, during compression, described grappling thorn can be recycled on described support bar, and the end of described support bar is in the shape that curves inwardly.

11. occluder for left auricle as claimed in claim 4, it is characterized in that: described shutoff dish is woven into woven mesh structure by titanium-nickel wire, and through being heat-treated to plate-like, and two ends are fixed by steel bushing, one end of shutoff dish is connected with terminal pad steel bushing; Described terminal pad is also be woven into mesh grid by titanium-nickel wire, and through being heat-treated to plate-like, and two ends are fixed by steel bushing.