CN209332372U

CN209332372U - Vena cava filter

Info

Publication number: CN209332372U
Application number: CN201822058227.8U
Authority: CN
Inventors: 卞弋; 陈卓; 杨柳
Original assignee: BEIJING PUHUI BIOMEDICAL ENGINEERING Co Ltd
Current assignee: BEIJING PUHUI BIOMEDICAL ENGINEERING Co Ltd
Priority date: 2018-12-08
Filing date: 2018-12-08
Publication date: 2019-09-03
Anticipated expiration: 2028-12-08

Abstract

The utility model relates to a kind of vena cava filters, including recovering hook and filtering position, position is filtered by several fixing pieces and filter rod component, fixing piece and filter rod one end flock together and are fixedly linked with recovering hook, the other end is free end and in the released state in radiation diverging, and it is deformable and to the curved bending section in recovering hook direction and the anchoring section made of hard metal that fixing piece is followed successively by body section, stress from one end of connection recovering hook to its free end.The utility model has when withdrawing vena cava filter, and the bending section stress deformation of fixing piece avoids fixing piece from scratching sheath to protect to sheath.

Description

Vena cava filter

Technical field

The utility model relates to the technical fields of medical instrument, more particularly, to a kind of vena cava filter.

Background technique

Venous thromboembolism (VTE) includes deep vein thrombosis (DVT) and pulmonary embolism (PE), is one in worldwide Kind common disease, the death rate are high.A variety of state of an illness conditions are in patient under the risk of short-term pulmonary embolism simultaneously, in such disease phase Between, when especially anticoagulant therapy method shows undesirable or failure, need to consider to use filter device in the vena cave of patient.Percutaneously The filter device punctured in implantable vena cave has developed for many years, has been devised by a variety of vena cava filters in recent years.

Existing vena cava filter mainly includes the filtering position being made of several fixing pieces, and wherein fixing piece uses metal Silk.All fixing piece one end, which flock together, is fixed as fixing end, and the other end is free end and is in radiation divergent shape.In fixation The free end of part is provided with the anchoring end that the crotch routed up outward is fixing piece.

As shown in Figure 1, when withdrawing vena cava filter, since the anchoring end 21 of vena cava filter is prolonged by fixing piece 21 Stretch it is rear it is turned-out roll over, during anchoring the income of end 22 to sheath 1, the outer edge of fixing piece 21 is fitted in sheath 1 At inner wall, and the outer wall exposing that sheath 1 is stretched out in end 22 is anchored, 22 crooked place of end is hard to be difficult to become simultaneously because anchoring Shape can not be fettered deformation by the nozzle of sheath 1 entering 1 moment of sheath, be scraped so anchoring end 22 exists in the moment into sheath The case where broken sheath 1.Sheath 1 is scratched rear little particle easy to form and is fallen into blood, and secondary injury is formed.

Utility model content

The purpose of the utility model is to provide a kind of vena cava filters, have when withdrawing vena cava filter, Gu The bending section stress deformation of part is determined to protect to sheath, and fixing piece is avoided to scratch sheath.

The above-mentioned purpose of utility model of the utility model has the technical scheme that

A kind of vena cava filter, including recovering hook and filtering position, filter position by several fixing pieces and filter rod group Part, fixing piece and filter rod one end flock together and are fixedly linked with recovering hook, and the other end is free end and in release conditions It is lower in radiation diverging, fixing piece be followed successively by from one end of connection recovering hook to its free end body section, stress it is deformable and to The curved bending section in recovering hook direction and the anchoring section made of hard metal.

By using above-mentioned technical proposal, the state due to bending section in stress can deform, thus passing through sheath During pipe recycles vena cava filter, when sheath and bending section are in contact, bending section because its plasticity to Sheath is protected, avoids scratching sheath.

The utility model is further arranged to: body section and bending section are integrally formed.

By using above-mentioned technical proposal, procedure of processing is reduced, is convenient for venacaval batch production.

The utility model is further arranged to: body section is split type with bending section and is fixedly linked.

By using above-mentioned technical proposal, separate machined can be carried out to body section and bending section respectively, accelerating cavity is quiet The speed of production of arteries and veins filter.

The utility model is further arranged to: the external side that is located at of anchoring section is provided with outwardly directed anchoring hook.

By using above-mentioned technical proposal, more conducively vena cava filter is hung on blood vessel.

The utility model is further arranged to: anchoring hook is cut and is bent along the axis of itself by anchoring section.

By using above-mentioned technical proposal, the case where avoiding anchoring hook from separating with anchoring section.

The utility model is further arranged to: anchoring hook and anchoring section are split type and by welding or anchor stationary phase Even.

By using above-mentioned technical proposal, it is easier the formation of anchoring hook.

The utility model is further arranged to: the free end of anchoring hook is bent to the free extreme direction of anchoring section.

By using above-mentioned technical proposal, certain protective effect is carried out to blood vessel.

The utility model is further arranged to: filter rod is domed.

By using above-mentioned technical proposal, increase the structural strength of filter rod, so that filter rod is not easy stress and deform.

In conclusion the advantageous effects of the utility model are as follows:

1. curved when sheath is in contact with bending section in vena cava filter recycling since bending section is deformable under stress Tune stress deforms, and makes inside of the anchoring hook towards sheath, to protect sheath, avoids scratching sheath；

2. by setting anchoring hook, so that more conducively vena cava filter is hung on blood vessel.

Detailed description of the invention

Fig. 1 is background technique figure；

Fig. 2 is the structural schematic diagram of vena cava filter；

Fig. 3 is the partial enlargement diagram of part A in Fig. 2；

Fig. 4 is the structural schematic diagram of embodiment 2；

Fig. 5 is the structural schematic diagram of embodiment 3.

In figure, 1, sheath；2, filter body；21, fixing piece；211, body section；212, bending section；213, anchoring section； 214, anchoring hook；22, end is anchored；23, filter rod；24, recovering hook.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

Embodiment 1 is a kind of vena cava filter disclosed by the utility model, including filter body 2, filtering referring to Fig. 2 Device ontology 2 includes recovering hook 24 and the filtering position being fixedly linked with recovering hook 24, wherein filtering position is by several fixing pieces 21 and filter rod 23 be formed by expansible storage reticular structure.Fixing piece 21 and 23 one end of filter rod and 24 stationary phase of recovering hook Even, the other end is free end.In the state of release, the free end of fixing piece 21 and filter rod 23 is in for fixing piece 21 and filter rod 23 Radiate divergent shape.

Referring to Fig. 2, Fig. 3, fixed link 21 is followed successively by body section 211, curved from one end of connection recovering hook 24 to its free end Tune 212 and anchoring section 213, wherein body section 211 is integrally formed or is welded and fixed with recovering hook 24 and is connected.Bending section 212 By being made with plastic material, such as the wire with elastic plastic deformation or high molecular material are made.Bending section 212 One end is fixedly linked with body section 211, the outside of the outside filter body 2 of the other end and the direction bending of recovering hook 24.Anchor Gu section 213 is that the metal of hard is made and is fixedly linked with bending section 212.

Referring to Fig. 3, the outside of anchoring section 213 is provided with anchoring hook 214 made of hard metal material, wherein anchoring Hook 214 is that have anchoring section 213 to cut in half along own axes, and wherein half is bent to the outside of anchoring section 213.Anchoring hook A bifurcated is formed between 214 and anchoring section 213.The free end of anchoring hook 214 is bent to the free extreme direction of anchoring section 213.

Referring to Fig.1, the ontology of filter rod 23 is domed, and wherein one end is fixedly linked with recovering hook 21, and the other end is free end. Middle position of the arch opening of filter rod 23 towards filtering position.

Embodiment 2, referring to Fig. 4, a kind of vena cava filter, embodiment 2 the difference from embodiment 1 is that: anchoring hook 214 with Anchoring section 213 be it is split type, anchoring hook 214 is made of hard metal material, is passed through between anchoring hook 214 and anchoring section 213 Welding or anchoring are connected.

Embodiment 3, referring to Fig. 5, a kind of vena cava filter, embodiment 3 the difference from embodiment 1 is that: fixing piece 21 Body section 211 and bending section 212 are made of the metal material or high molecular material of the plastically deformable of same elasticity, ontology It is integrally formed between section 211 and bending section 212.

The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical Within novel protection scope.

Claims

1. a kind of vena cava filter, including recovering hook (24) and filtering position, the filtering position is by several fixing pieces (21) And filter rod (23) component, the fixing piece (21) and filter rod (23) one end flock together and with recovering hook (24) stationary phase Even, the other end is free end and dissipates in the released state in radiation, it is characterised in that: the fixing piece (21) connects back to certainly Receive hook (24) one end to its free end be followed successively by body section (211), stress it is deformable and to recovering hook (24) direction be bent Bending section (212) and the anchoring section made of hard metal (213).

2. vena cava filter according to claim 1, it is characterised in that: the body section (211) and bending section (212) one It is body formed.

3. vena cava filter according to claim 1, it is characterised in that: the body section (211) is with bending section (212) It is split type and be fixedly linked.

4. vena cava filter according to claim 1, it is characterised in that: the anchoring section (213) is located at external one Side is provided with outwardly directed anchoring hook (214).

5. vena cava filter according to claim 4, it is characterised in that: the anchoring hook (214) is by anchoring section (213) edge Itself axis cut and bend.

6. vena cava filter according to claim 4, it is characterised in that: the anchoring hook (214) is with anchoring section (213) It is split type and by welding or be fixedly linked.

7. vena cava filter according to claim 4, it is characterised in that: the free end of the anchoring hook (214) is to anchoring The free extreme direction bending of section (213).

8. vena cava filter according to claim 1, it is characterised in that: the filter rod (23) is domed.