CN202875530U

CN202875530U - Self-expanding vena cava filter

Info

Publication number: CN202875530U
Application number: CN 201220570396
Authority: CN
Inventors: 蔡涛; 王永强; 李奕沄; 徐新华; 许永松
Original assignee: BEIJING TAIJIEWEIYE TECHNOLOGY Co Ltd
Current assignee: BEIJING TAIJIEWEIYE TECHNOLOGY Co Ltd
Priority date: 2012-11-01
Filing date: 2012-11-01
Publication date: 2013-04-17
Anticipated expiration: 2022-11-01

Abstract

The utility model provides a self-expanding vena cava filter. According to a filtering capture section, on the basis of a closed annular structure, six V-shaped rods are extended out in parallel, the filtering capture section is equally divided by the V-shaped rods and rotates, the branch ends of the V-shaped rods are connected with supporting pillars of a supporting section to form a net structure with a tapered surface, branches at the tail ends of the V-shaped rods of the filtering capture section are mutually connected and intersected and the six parallel supporting pillars are extended out of the tail ends of the V-shaped rods of the filtering capture section, and thus the supporting section is formed. Spinous protrusions with the same number as the supporting pillars are arranged between the filtering capture section and the supporting section to form a anti-shifting section, a pre-filtering section is located at the other end of the supporting section, and the structures of the pre-filtering section and the filtering capture section are symmetric. Due to the fact that self-expanding memory alloy material is adopted, the self-expanding vena cava filter is convenient to operate in a interventional therapy process, and convenient to release and recover, the operation time is saved, the bleeding amount is reduced, the pain of patients is relieved, and the self-expanding vena cava filter brings convenience to an operator. In the implantation period of the filter, the supporting section is attached to the wall of blood vessels, and functions together with the anti-shifting section, the conditions including shifting, drifting and skewing and the like of an implant can be effectively avoided.

Description

A kind of self-inflated vena cava filter

Technical field

This utility model relates to a kind of self-inflated vena cava filter, belongs to the vena cava filter technical field.

Background technology

Oneself becomes the commonly encountered diseases of harm humans health venous thrombosis, and sickness rate rises year by year, and important complication is that thrombosis comes off repeatedly, causes pulmonary embolism and pulmonary infarction, and mortality rate is high, seriously jeopardizes patient's life.Adopt traditional operation treatment, wound face is larger, dangerous large, adopted in recent years interventional therapy, it is to adopt the method for percutaneous puncture that the percutaneous IVCF is put art, by the conduit carrier, places the metal filter at postcava, filter can stop thrombosis up, prevention or minimizing pulmonary thromboembolism.Compare with traditional surgical operation, the percutaneous IVCF is put art simply, safely, effectively, is widely adopted in recent years.The filter kind is more at present, but exists the shortcomings such as easy inclination, displacement and postcava perforation.

The vena cava filter of various ways is disclosed such as Chinese patent application CN02264778, CN200620030819, CN200720173001, CN200820111457 etc., by the variation of filter structure, can reaching not, injured blood vessel, raising stability reach purposes such as catching better thrombosis.Because may there be displacement in various filter reasons in structure after implantation, drift, the generation of the situations such as inclination.

All in all, existing filter mainly is divided into recyclable filter and can not returns filter (being the Permanent implantation filter).

Recyclable filter possibly can't reclaim smoothly owing to reasons such as tissue adhesion, blood vessel endotheliums; If reclaim by force, the complication such as may cause that caval vein is torn.

Not recyclable filter is along with the lengthening of Implantation Time, thrombosis or IVCF itself that the spreading of far-end thrombosis, IVCF catch bring out as human body foreign body, eventually to involving whole postcava tube chamber, cause the severe complications such as local thrombus formation, inferior vena cava obstruction, this type of filter causes that having the symptom caval vein to block incidence rate is 2% ~ 10%, and asymptomatic caval vein blocks incidence rate up to 30%.

The utility model content

The purpose of this utility model is to discharge the problem that is difficult for recovery in order to solve existing vena cava filter inconvenience, and then a kind of self-inflated vena cava filter is provided.

The purpose of this utility model is achieved through the following technical solutions:

A kind of self-inflated vena cava filter, comprise: recoverer, pre-filtering section, the support portion, anti-displacement portion and filtration capture unit, described recoverer, pre-filtering section, the support portion, anti-displacement portion and filtration capture unit integral body are to be formed by same memory alloy material cut, filter capture unit and stretch out six V shape poles by the circulus of a closure is parallel, with minute rotations such as V shape poles, its branch end is connected with the support column of support portion, formed the network structure of the conical surface, the first half adhesion separation section width of V shape pole is between 0.2 ~ 0.5mm, and the width of two muscle sections of furcation is between 0.1 ~ 0.4mm; The bifurcated that filters capture unit V shape pole end interconnects to intersect and extends parallel six roots of sensation support column, namely consisted of the support portion, the rib width of support bar is between 0.8 ~ 1.2mm, filtering between capture unit and the support portion, there is the thorn-like projection with the support column equal number to be anti-displacement portion, with the other end of the pre-filtering section of filtering the capture unit symmetrical configuration in the support portion, be recoverer at the end of pre-filtering section.

The beneficial effects of the utility model are: 1, adopt the marmem pipe material cutting one-body molded, not easy to crack so that whole filter material is identical, intensity is good, the unstability of having avoided the different materials welding to bring; 2, support cylinder and provide good adherent property to discharging after-filter; 3, several support cylinders form the multi-faceted column shape, prevent that filter from rolling in blood vessel; 4, the pre-filtering section of symmetrical configuration can effectively filter and catch thrombosis with the filtration capture unit; 5, the thorn-like projection of anti-displacement portion can be thrust caval vein shallow-layer blood vessel wall after filter is implanted, prevented that filter is subjected to displacement under the effect of blood flow and drifts about; Live the recoverer of filter when 6, reclaiming filter with the catcher circle, the filter income is reclaimed in the sheath pipe again, taking-up gets final product.

Description of drawings

The structural representation of a kind of self-inflated vena cava filter that Fig. 1 provides for the specific embodiment of the present utility model;

Fig. 2 is that vena cava filter adopts the integral body of 4,5,6,8 support column arrangement to overlook design sketch;

Fig. 3 is the schematic diagram of anti-displacement portion;

Fig. 4 is that recyclable vena cava filter recoverer and catcher trend towards the intersection location design sketch;

Fig. 5 is that recyclable vena cava filter recoverer and catcher location are determined, prepares the design sketch that catches;

Fig. 6 is the design sketch that the take-up of recyclable vena cava filter catcher is combined with recoverer;

Fig. 7 is that the recyclable vena cava filter device that is captured drives and to enter the design sketch that reclaims the sheath pipe;

Fig. 8 is the design sketch of recyclable vena cava filter recoverer list hook and double hook design.

The specific embodiment

Below in conjunction with accompanying drawing this utility model is described in further detail: the present embodiment is implemented under take technical solutions of the utility model as prerequisite, has provided detailed embodiment, but protection domain of the present utility model is not limited to following embodiment.

Such as Fig. 1 ~ shown in Figure 3, a kind of self-inflated vena cava filter that the present embodiment is related, comprise: recoverer 1, pre-filtering section 2, support portion 3, anti-displacement portion 4 and filtration capture unit 5, described recoverer 1, pre-filtering section 2, support portion 3, anti-displacement portion 4 and filtration capture unit 5 integral body are to be formed by same memory alloy material cut, filter capture unit 5 and stretch out six V shape poles by the circulus of a closure is parallel, with minute rotations such as V shape poles, its branch end is connected with the support column of support portion 3, formed the network structure of the conical surface, whole filtration capture unit 5 is overlooked effect for dividing equally hexagonal petal effect.The first half adhesion separation section width of V shape pole is between 0.2 ~ 0.5mm, and the width of two muscle sections of furcation is between 0.1 ~ 0.4mm; The bifurcated that filters capture unit 5V shape bar end interconnects to intersect and extends parallel six roots of sensation support column, namely consisted of support portion 3, the rib width of support bar is between 0.8 ~ 1.2mm, filtering between capture unit 5 and the support portion 3, there is the thorn-like projection with the support column equal number to be anti-displacement portion 4, with the pre-filtering section 2 of filtering capture unit 5 symmetrical configuration in the support portion 3 the other end, are recoverers 1 at the end of pre-filtering section 2.

Described support portion 3 is four, five, six or eight column constructions that the support column that is parallel to each other forms.The hexahedro column construction of six roots of sensation parallel columns preferably.

Described is anti-displacement portion 4 at every support column with filtering capture unit 5 junctions, and each muscle all has a thorn-like projection on the described anti-displacement portion 4, and described thorn-like projection can be for unimodal or bimodal.

The crotch degree of depth of hook is 0.3mm ~ 0.8mm in the described recoverer 1.

The length of described whole recoverer 1 is 2mm ~ 5mm.

The preferred length of described whole recoverer 1 is 4mm.

The crotch-shaped of described recoverer 1 hook is single hook or double hook.

The above; it only is the better specific embodiment of this utility model; these specific embodiment all are based on the different implementations under this utility model general idea; and protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that this utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.

Claims

1. self-inflated vena cava filter, comprise: recoverer, pre-filtering section, the support portion, anti-displacement portion and filtration capture unit, it is characterized in that, described recoverer, pre-filtering section, the support portion, anti-displacement portion and filtration capture unit integral body are to be formed by same memory alloy material cut, filter capture unit and stretch out six V shape poles by the circulus of a closure is parallel, with minute rotations such as V shape poles, its branch end is connected with the support column of support portion, formed the network structure of the conical surface, the first half adhesion separation section width of V shape pole is between 0.2 ~ 0.5mm, and the width of two muscle sections of furcation is between 0.1 ~ 0.4mm; The bifurcated that filters capture unit V shape pole end interconnects to intersect and extends parallel six roots of sensation support column, namely consisted of the support portion, the rib width of support bar is between 0.8 ~ 1.2mm, filtering between capture unit and the support portion, there is the thorn-like projection with the support column equal number to be anti-displacement portion, with the other end of the pre-filtering section of filtering the capture unit symmetrical configuration in the support portion, be recoverer at the end of pre-filtering section.

2. self-inflated vena cava filter according to claim 1 is characterized in that, described support portion is four, five, six or eight column constructions that the support column that is parallel to each other forms.

3. self-inflated vena cava filter according to claim 1 is characterized in that, each muscle all has a thorn-like projection on the described anti-displacement portion.

4. self-inflated vena cava filter according to claim 3 is characterized in that, described thorn-like projection is unimodal or bimodal.

5. self-inflated vena cava filter according to claim 1 is characterized in that, the crotch degree of depth of hook is 0.3mm ~ 0.8mm in the described recoverer.

6. self-inflated vena cava filter according to claim 1 is characterized in that, the length of described whole recoverer is 2mm ~ 5mm.

7. self-inflated vena cava filter according to claim 6 is characterized in that, the length of described whole recoverer is 4mm.

8. self-inflated vena cava filter according to claim 1 is characterized in that, the crotch-shaped of described recoverer hook is single hook or double hook.