CN203885663U

CN203885663U - Release system capable of degrading vena cava filter

Info

Publication number: CN203885663U
Application number: CN201420178084.3U
Authority: CN
Inventors: 高志康; 徐浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-14
Filing date: 2014-04-14
Publication date: 2014-10-22
Anticipated expiration: 2024-04-14

Abstract

The utility model discloses a release system capable of degrading a vena cava filter, and the system comprises a filter, a release sheath (5), and a push sheath (6), wherein the filter, the release sheath (5) and the push sheath (6) are sequentially connected. The push sheath (6) consists of an outer casing pipe (61), a torsion controller (62), and a push guide wire (63). The system is characterized in that the filter consists of vertical columns (1), fixing anchors (2) and filtering bodies (3), and is in a lantern structure; the number of the vertical columns (1) is six, and two ends of each column (1) are separated and fused with the adjacent vertical columns (1); the heads of the vertical columns (1) are gathered to form a body, thereby forming six rhombic filtering bodies (3); the heads of the six rhombic filtering bodies (3) are fused; the peripheries of the six rhombic filtering bodies (3) are provided with the fixing anchors (2); the filter is made of degradable materials; the system provided by the utility model effectively prevents thrombus from entering into a pulmonary artery, is easy to implant into a vena cava, is accurate and stable in positioning, is not easy to damage a blood vessel, can be completely degraded in a human body after treatment, and avoids the risks caused by a conventional perpetual filter or a temporary filter.

Description

Degradable vena cava filter and delivery system

Technical field

This utility model relates to a kind of interventional medical device, specifically a kind of degradable vena cava filter and delivery system.

Background technology

In phlebothrombosis sickness rate approximately 100 people/100,000/year, wherein 10-40% occurs that thrombosis comes off and causes pulmonary embolism, patient to occur acute heart failure sudden death.Vena cava filter is to be back to Pulmonic a kind of intervention apparatus for tackling thrombosis, and it can effectively prevent the generation of pulmonary embolism.

Since the filter of first percutaneous puncture placement in 1967, vena cava filter is at nearly 50 years history of clinical use, the use rapid development of vena cava filter over nearly 20 years, 1992, the U.S. implants ten thousand pieces of filters of 3-4 altogether, within 2007, reaches 213000, increases every year on average 16%.

Vena cava filter is divided into permanent type, interim type and convertible type three types.Permanent type filter can not take out by percutaneous puncture approach after implanting, and should open or open the taking-up of abdominal incision caval vein through surgery as need take out.Interim type filter was implanted in the pulmonary embolism risk phase, and risk after date takes out, but this device need be fixed on external by conduit or seal wire, infection chance is large, once interception thrombosis in filter cannot take out, immediately as thrombosis is not eliminated for a long time, filter and caval vein wall grow up to one, cannot take out.Desirable removing from mould filter has the feature of above-mentioned two kinds of filters, after implantation, can take out through body surface in the given time, also can according to circumstances not take out, and makes it forever to stay in body, and interim type filter transfers permanent type filter to.

Permanent type filter is vascular inner body, and after phlebothrombosis and pulmonary embolism Risk Reduction, this filter has the risk of bringing out new thrombosis on the contrary.At present tend to apply convertible type filter more, in the time that the state of an illness needs, implant, when the state of an illness does not need, take out.Reduce like this risk of new thrombosis, but all must again carry out operation technique, the new position of even puncturing, adopt more, thicker, the larger apparatus of damage to be taken out, bring new operation risk, increased the weight of patient's medical treatment burden, increased patient's secondary misery.

Summary of the invention

The problem existing for above-mentioned prior art, this utility model provides a kind of degradable vena cava filter and delivery system, effectively pre-preventing thrombosis enters pulmonary artery, be easy to implant cavity vein, accurate positioning is steadily difficult for injured blood vessel, degradable in human body after completed treatment object, avoid the risk that uses existing permanent type filter or interim filter to bring.

To achieve these goals, the technical solution adopted in the utility model is: a kind of degradable vena cava filter and delivery system, comprise filter, the release sheath connecting successively and push sheath, pushing sheath is made up of trocar sheath, twisting controller and propelling movement seal wire, described filter is made up of vertical column, mooring anchor and filtering bodies, is lantern structure; Vertical column is 6, and separately, merge with adjacent plumb post at two ends, the filtering bodies that head end is gathered is integral, form 6 diamond shaped, and filtering bodies head end merges, and filtering bodies surrounding arranges mooring anchor; The material of described filter is degradation material.

Degradation material is almag AE21 or WE43 or AZ31 or AM60.

The tinsel that vertical column and filtering bodies diameter are 0.1-0.2mm.

Discharging sheath is connected by fixation hook with filter.

Compared with existing vena cava filter: this utility model filtering bodies diamondwise shape, be easy to the caval vein that implants, can tackle thrombosis and prevent pulmonary embolism, complete after medical function degradable, avoid the related complication causing in permanent indwelling body, also avoided clinical filter second operation to take out the medical-risk and the medical expense that cause.

Brief description of the drawings

Fig. 1 is this utility model structural representation;

Fig. 2 is this utility model left view.

In figure: 1, vertical column, 2, mooring anchor, 3, filtering bodies, 4, fixation hook, 5, discharge sheath, 6, push sheath, 61, trocar sheath, 62, twisting controller, 63, push seal wire.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As depicted in figs. 1 and 2, a kind of degradable vena cava filter and delivery system, comprise filter, the release sheath 5 connecting successively and push sheath 6, propelling movement sheath 6 forms described filter by trocar sheath 61, twisting controller 62 and propelling movement seal wire 63 and is made up of vertical column 1, mooring anchor 2 and filtering bodies 3, is lantern structure; Vertical column 1 is 6, and separately, merge with adjacent plumb post 1 at two ends, the filtering bodies 3 that head end is gathered is integral, form 6 diamond shaped, and filtering bodies 3 head ends merge, and filtering bodies 3 surroundings arrange mooring anchor 2; The material of described filter is degradation material.。

Degradation material is almag AE21 or WE43 or AZ31 or AM60.

As preferably, the tinsel that vertical column 2 and filtering bodies 3 diameters are 0.1-1mm, is convenient to processing, has higher support force.

Further, discharge sheath 5 and be connected by fixation hook 4 with filter, ensure that filter is difficult for tilting and displacement.

This utility model filter and catheterization thrombolysis use in conjunction, after thromboembolism treatment, thrombosis is removed, and waits for that degraded, the degradation time of filter are 1-6 month, by changing material and the structure scalable degradation time of filter in filter indwelling body.

Be released to postcava as example explanation application process taking this utility model:

Through strong side femoral venous puncture, under seal wire guiding, will discharge sheath 5 to renal veins below;

Vena cava filter is compressed in and discharges in sheath 5, and tail end is connected in the metal crotch of trocar sheath 61 and propelling movement seal wire 63 head ends;

With pushing sheath 6, filter is sent into and discharged sheath 5 tail ends, vena cava filter is pushed to discharge in sheath 5 through pushing seal wire 63 and trocar sheath 61, after and the accurate positioning concordant with release sheath 5 head ends of vena cava filter head end, fixed jacket pipe 61, withdraw and discharge sheath 5, vena cava filter discharges successfully;

As dissatisfied in vena cava filter off-position, fixed jacket pipe 61 and propelling movement seal wire 63, push and discharge sheath 5, reclaims filter, location release again;

After filter off-position is satisfied, unclamp the twisting controller 62 that pushes seal wire 63 ends, withdraw trocar sheath 61, the fixation hook that pushes seal wire 63 head ends unclamps, and filter is freed successfully;

Withdraw and push seal wire 63 in trocar sheath 61, withdraw trocar sheath 61 in discharging sheath 5, withdraw from and discharge sheath 5, point of puncture pressure dressing.

Claims

1. a degradable vena cava filter and delivery system, comprise filter, the release sheath (5) connecting successively and push sheath (6), push sheath (6) by trocar sheath (61), twisting controller (62) and push seal wire (63) and form, it is characterized in that, described filter is made up of vertical column (1), mooring anchor (2) and filtering bodies (3), is lantern structure; Vertical column (1) is 6, and separately, merge with adjacent plumb post (1) at two ends, the filtering bodies (3) that head end is gathered is integral, form 6 diamond shaped, and filtering bodies (3) head end merges, and filtering bodies (3) surrounding arranges mooring anchor (2); The material of described filter is degradation material.

2. a kind of degradable vena cava filter according to claim 1 and delivery system, is characterized in that, described degradation material is almag AE21 or WE43 or AZ31 or AM60.

3. a kind of degradable vena cava filter according to claim 1 and 2 and delivery system, is characterized in that, the tinsel that described vertical column (2) and filtering bodies (3) diameter are 0.1-1mm.

4. a kind of degradable vena cava filter according to claim 1 and 2 and delivery system, is characterized in that, described release sheath (5) is connected by fixation hook (4) with filter.