CN206934207U - Thrombus filter - Google Patents

Abstract

The utility model discloses a kind of thrombus filter, including a filter and a pushing piece, filter is detachably connected with pushing piece, filter includes an afterbody body and the successively alternate counter-jib and supporting leg extended from afterbody body, counter-jib and supporting leg collectively form diamond-shaped element filter grid, each supporting leg includes a barb away from afterbody body one end, and afterbody body includes a recovering hook, and barb is consistent with the incline direction of recovering hook.Filter realizes detachable fixation with pushing piece, during filter is placed to the diseased region of patient, can compare the accurate positioning of adjustment back and forth, repeatedly release, the normal work without influenceing renal vein；After the completion of filter implantation, only pushing piece need to be gently rotated, you can extract pushing piece out of filter afterbody body out, pushing piece takes out that process is simple and convenient, and pushing piece does not interact contact in extraction to the filter placed, there will not be disturbance to filter.

Description

Thrombus filter

Technical field

Medical treatment device is the utility model is related to, more particularly, to a kind of thrombus filter for treating pulmonary embolism.

Background technology

Pulmonary embolism (abbreviation pulmonary embolism pulmonary embolism, PE) is due to around DVT or the right heart The thrombus breaks loose of chamber enters pulmonary circulation, blocks pulmonary artery or its branch, so trigger it is a series of using pulmonary circulatory function obstacle as Main clinical pathology physiological change, serious meeting cause sudden death.Research shows, causes the embolus that PE occurs to be mainly derived from limbs The thrombus that Deep venou or pelvic veins come off, account for the 60%~90% of embolus source.It is possible thereby to renal vein open horizontal with A filter is placed at lower place, is intercepted the free embolus in blood, can effectively be prevented the generation of pulmonary embolism, at present the skill Art is just constantly being applied to clinical treatment and is achieving very good effect.

It can be divided into according to the difference of thrombus filter RT in vivo：Permanent filter and recyclable filter.Forever Property filter can only be placed forever, can not be taken out.But the type filter is for a long time it is possible that corresponding complication, as moved Position, vena cave perforation, local thrombus are formed, inferior vena cava obstruction etc..Patient needs long-term use of anticoagulant simultaneously, and this is to actual Using bringing significant limitation.Recyclable filter is to start popularization and application in 10 years in the past, and it can be within a certain period of time (generally 3 months) takes out from internal, the shortcomings that so as to avoid Permanent implantation filter.

Have more than ten kinds of vena cava filter product both at home and abroad at present and be widely used in clinic.But the various filters of current popular The shortcomings that device more or less can all have itself, the wherein unstability of vena cava filter implantation process discharge and determined with that can not repeat The inaccurate implantation effect for directly affecting product in position.Some domestic vena cava filter products are using directly pusher, submitting filter During, pusher and filter cause that placement location is uncontrollable, can not repeatedly discharge without control structure is directly connected to, and cause Positioning performance is bad.The country's also some vena cava filter products are in integrally spindle, single-layer filter, can effectively catch thrombus And can ensures at a specified future date unobstructed, unique fixation anchor design, significantly improves and grabs attached ability to vascular wall, with controlled release skill Art, accurate positioning, front jumping when avoiding release completely, but realize that the methods of controlled release technologies is in tubing interior welds one Individual screwed plug head is threadedly coupled to realize, because the machining property of Nitinol is poor, it is difficult to enterprising in nickel-titanium alloy material Row screw thread process, and screwed plug head material is stainless steel, different from the Nitinol material of filter.There is electricity between unlike material Chemical reaction, the rear thread bolt head that implants easily corrode, and the time is more long, and corrosion is more severe, easily makes screwed plug head from filter Come off on device, therefore realize and filter, it is necessary to rotate pusher after the completion of effect is also not satisfactory, and filter is implanted into the blood vessels The separation of device is extracted out, and because filter is connected by screw thread or other class helicitic textures with pusher, pusher is in rotary course Revolving force can be transmitted to filter, so as to drive filter to rotate, this is likely to cause the skew of filter position, influences surgical effect.

Utility model content

For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of integrated design, can steadily, Repeat, fixedly positioning and recyclable thrombus filter.

The purpose of this utility model is realized using following technical scheme：

A kind of thrombus filter, including a filter and a pushing piece, the filter are detachably connected with the pushing piece, institute Stating filter includes an afterbody body and the successively alternate counter-jib and supporting leg extended from the afterbody body, the balance Arm and supporting leg collectively form diamond-shaped element filter grid, and each supporting leg falls away from described afterbody body one end including one Hook, the afterbody body include a recovering hook, and the barb is consistent with the incline direction of the recovering hook.

Preferably, the filter also includes an at least location division, the pushing piece be provided with one first groove and one with it is described Second groove of the first groove connection, few location division slide into first groove along second groove and being capable of edges First groove, which slides, makes the filter be snapped connection with the pushing piece.

Preferably, in a ring, second groove is linear for first groove, the bearing of trend of second groove Perpendicular to plane where first groove.

Preferably, each counter-jib is Y-shaped.

Preferably, the counter-jib and supporting leg are made up of super elastic memory functional material, in filter course of conveying, institute It is in close bundle-shaped to state counter-jib and supporting leg；In filter release conditions, the counter-jib and supporting leg are collectively forming a conical surface Net.

Preferably, the pushing piece includes a bolt head, and first groove and second groove are arranged at the bolt head On, the bolt head also includes a limited block, and the limited block is located at first groove away from the second groove side, described The external diameter of limited block is more than the external diameter of the afterbody body.

Preferably, the pushing piece is provided with some anchor points.

Compared with prior art, the beneficial effects of the utility model are：

By such scheme, the utility model at least has advantages below：

(1) location division in filter afterbody body of the present utility model is caught in the first groove, and filter is realized with pushing piece Detachable fixation, during filter is placed to the diseased region of patient, can compare the accurate positioning of adjustment back and forth, Repeatedly release, the normal work without influenceing renal vein, which greatly enhances the treatment after success rate of operation and implantation filter Effect；After the completion of filter implantation, only pushing piece need to be gently rotated, you can pushing piece is extracted out out of filter afterbody body, pushed Part takes out that process is simple and convenient, and pushing piece does not interact contact in extraction to the filter placed, will not There is disturbance to filter.

(2) filter of the present utility model is integral type structure, and proper alignment is good；Used relative to filter of the prior art The combining structure of Ni-Ti alloys and stainless steel, this filter is less perishable, and structure is more stable.

(3) this practicality can be made filter keep balancing after the implantation, not tilted using balance arm configuration.

(4) rhombus filter screen structure classical in the utility model, thrombus seizure can effectively be carried out；

(5) the fixation barb design in the utility model can effectively realize filter body fixedlying positioning in vena cave, Counter-jib afterbody is that Y-shaped symmetrical structure causes filter to be more easy to fit at vena cave inwall.

(6) recovering hook design of the present utility model can use in filter reclaims to filter after a period of time.

Brief description of the drawings

Fig. 1 is a structural representation of the utility model thrombus filter.

Fig. 2 is the amplification view at Fig. 1 thrombus filter A.

Fig. 3 is a sectional view of a limited block of Fig. 2 thrombus filter.

Fig. 4 is a sectional view of a location division of Fig. 2 thrombus filter.

Fig. 5 is the top view of a release conditions of Fig. 1 thrombus filter.

Fig. 6 is a stereogram of Fig. 5 thrombus filter.

In figure：10th, filter；11st, supporting leg；12nd, counter-jib；13rd, barb；20th, pushing piece；21st, anchor point；30th, bolt head； 40th, limited block；50th, the first groove；60th, recovering hook；70th, location division；80th, fixture block；81st, the second groove.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

It should be noted that when component is referred to as " being fixed on " another component, it can be directly on another component Or there may also be component placed in the middle.When a component is considered as " connection " another component, it can be directly connected to To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being arranged at " another component, it Can be set directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical ", " horizontal ", "left", "right" and similar statement for illustrative purposes only.

Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include The arbitrary and all combination of one or more related Listed Items.

Fig. 1 to Fig. 6 is referred to, a kind of thrombus filter, it includes filter 10, pushing piece 20, the afterbody body of filter 10 On include recovering hook 60 in tubular construction, after filter 10 places a period of time in vivo, can be returned by recovering hook 60 Receive the filter.The front end of pushing piece 20 is connected with a bolt first 30, is additionally provided with the afterbody body of filter 10 and is convex to afterbody body Location division 70 internal and with afterbody body in integral structure, the end of bolt first 30 is provided with the first groove of ring-type 50 and fixture block 80, fixture block 80 is provided with the second groove 81 to match with the shape of location division 70, and the groove depth of the first groove 50 is more than location division 70 It is convex enter depth.In one embodiment, each 70 rectangular sheet of the location division.The pushing piece 20 is push wirerope.Institute State that the second groove 81 is linear, second groove 81 extends perpendicularly to the place plane of the first groove 50.

Filter 10 includes the alternate counter-jib 12 and supporting leg 11 extended from afterbody body successively, counter-jib 12 and branch Support leg 11 is respectively set to 4, and counter-jib 12 and supporting leg 11 collectively form diamond-shaped element filter grid, the filter grid of interconnection The screen pack of filter is collectively formed, sees Fig. 5；The afterbody of counter-jib 12 is Y-shaped symmetrical structure, the knot of Y-shaped counter-jib 12 Structure is more beneficial for balance of the filter at vena cave inwall；There are a barb 13, its inclination side in the end of every supporting leg 11 To and its direction consistent with the direction of recovering hook 60 back to the central axial outer of filter, thrombus filter during release, Supporting leg 11 is contacted with vena cave inwall, and barb 13 is hooked at vena cave inwall, and filter 10 can be fixedly secured in vivo again, see figure 6。

Counter-jib 12 and supporting leg 11 are made up of super elastic memory functional material, in close tube bank in filter course of conveying Shape, it is in Conical Lattice in filter release conditions.

Pushing piece 20 is provided with some anchor points 21, and pushing piece 20 can pass through the anchor point 21 when pushing filter 10 Realize being accurately positioned for the push of filter 10.

The external diameter of bolt first 30 is less than the internal diameter of the afterbody body of filter 10, so as to ensure that bolt first 30 can insert afterbody body It is interior.

Limited block 40 is provided with positioned at the rear portion of the first groove 50 on bolt first 30, the external diameter of limited block 40 is more than the tail of filter 10 The external diameter of portion's body, during the push of filter 10, the limited block 40 can further limit the motion of pushing piece 20, prevent It passes through filter 10.

The present embodiment filter 10 is formed using the integration cutting of Nitinol pipe laser.Its processing method is:Utilize laser Cutting machine, engrave out main body decorative pattern on nickel-titanium alloy surface, and screw type cuts out recovering hook 60；Then by heat at The netted filter body of the elastomeric conical surface is produced in reason sizing；Nickel-titanium alloy afterbody radial symmetric formula is respectively cut by laser out Two location divisions 70 so as to form the location division 70 of two symmetrical expressions, are pressed to afterbody tubular body, pass through heat treatment by two seams Sizing, two location divisions 70 are formed in the afterbody body of filter 10, see Fig. 2 and Fig. 4.

The release process for the thrombus filter that the present embodiment is provided is as follows：Due to the shape of the groove 81 of location division 70 and second Shape matches, and location division 70 passes through the second groove 81 being arranged on fixture block 80 first, and location division 70 is caught in the first groove 50, Rotation pushing piece 20 causes location division 70 to stagger with the relative position of the second groove 81, and location division 70 is so that before in the first groove 50 After fix, see Fig. 2；Then filter 10 is implanted into inferior caval vein by pushing piece 20, filter 10 is placed to the lesion of patient During position, accurate adjustment positioning back and forth can be compared, the normal work without influenceing renal vein, can be reached flat Surely, the purpose of controlled release；, only need to be by rotating pushing piece 20 so that the groove 81 of location division 70 and second after being accurately positioned Position is corresponding, pulls out pushing piece 20, and pushing piece 20 does not contact with each other during pull-out with filter 10, therefore to filter The position of device 10 will not produce disturbance.

It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various Corresponding change and deformation, and all these changes and deformation should all belong to the protection of the utility model claims Within the scope of.

Claims (7)

1. a kind of thrombus filter, including filter and pushing piece, it is characterised in that：The filter detachably connects with the pushing piece Connect, the filter includes afterbody body and the successively alternate counter-jib and supporting leg extended from the afterbody body, described Counter-jib and supporting leg collectively form diamond-shaped element filter grid, and each supporting leg includes away from described afterbody body one end Barb, the afterbody body include recovering hook, and the barb is consistent with the incline direction of the recovering hook.

2. thrombus filter according to claim 1, it is characterised in that：The filter also includes location division, the push Part is provided with the first groove and the second groove connected with first groove, and the location division slides into institute along second groove State the first groove and can be slided along first groove makes the filter be snapped connection with the pushing piece.

3. thrombus filter according to claim 2, it is characterised in that：In a ring, described second is recessed for first groove Groove is linear, the plane where extending perpendicularly to first groove of second groove.

4. thrombus filter as claimed in claim 2, it is characterised in that：The pushing piece includes bolt head, first groove And second groove is arranged on the bolt head, the bolt head also includes limited block, and the limited block is recessed positioned at described first For groove away from the second groove side, the external diameter of the limited block is more than the external diameter of the afterbody body.

5. thrombus filter according to claim 1, it is characterised in that：Each counter-jib is Y-shaped.

6. thrombus filter according to claim 1, it is characterised in that：The counter-jib and supporting leg are by super elastic memory Functional material is made, and in filter course of conveying, the counter-jib and supporting leg are in close bundle-shaped；In filter release conditions, The counter-jib and supporting leg are collectively forming a Conical Lattice.

7. thrombus filter as claimed in claim 1, it is characterised in that：The pushing piece is provided with some anchor points.