CN104434340A - Vena cava filter - Google Patents
Vena cava filter Download PDFInfo
- Publication number
- CN104434340A CN104434340A CN201410768206.9A CN201410768206A CN104434340A CN 104434340 A CN104434340 A CN 104434340A CN 201410768206 A CN201410768206 A CN 201410768206A CN 104434340 A CN104434340 A CN 104434340A
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- vena cava
- net cylinder
- filter
- cava filter
- present
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Abstract
The invention provides a vena cava filter which comprises a columnar net barrel. Shape memory wire threads are woven to form the columnar net barrel, a filter structure which is use for filtering thrombi is arranged in the net barrel and comprises a plurality of rod-shaped filter components, one end of each filter component is connected with the inner wall of the net barrel, and the other end of each filter component is connected with a connector. The filter components are perpendicular to the axis of the net barrel and are pressure springs. The vena cava filter has the advantages that the vena cava filter is of a net barrel structure, nickel-titanium alloy wires are woven to form the net barrel, accordingly, the vena cava filter is excellent in blood vessel adherence, and severe complications due to the fact that the vena cava filter moves and falls off to the hearts and the lungs of human bodies and is broken, vena cava is perforated and the like can be prevented; the vena cava filter can be recycled and can be conveniently implanted into the human bodies and taken out of the human bodies via the connectors; the vena cava filter which is of the net barrel structure can deform, is adaptive to the shapes of the blood vessels of the human bodies, and can be contracted when implanted into the human bodies and taken out of the human bodies, so that the vena cava filter with a small diameter can be arranged in a conveyor device.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, particularly relate to a kind of vena cava filter.
Background technology
The acute disease that pulmonary embolism is clinical onset rate, mortality rate is higher, is wherein modally caused by pulmonary thromboembolism.According to incompletely statistics, China has 35.5 ten thousand routine Pulmonary Embolism Patients at present.
Vena cava filter to be positioned in caval vein for catching a kind of vascular filtration structure of thrombosis, can avoid thrombosis moves on to cardiopulmonary, effectively prevent pulmonary embolism.Vena cava filter can be used for anticoagulant to be avoided and the patient having acute pulmonary embolism or acute near-end (above knee) venous thrombosis.Along with the development of clinical technology and manufacturing technology, the performance of vena cava filter and implantation have had significant progress.
Vena cava filter is the usual armarium of Interventional Radiography and Vascular surgeons.Vena cava filter is by puncture femoral vein or jugular vein and at the auxiliary lower implant cavity vein of contrastographic picture.Vena cava filter is divided into permanent filter and provisional filter (also referred to as recyclable filter).Early stage vena cava filter is all permanent, be placed in caval vein and just cannot take out with intervening mode, because vena cava filter is also endovascular foreign body, there is the danger bringing out thrombosis equally, therefore the client need long-term anticoagulant therapy after placed cavity vein filter, this just brings inconvenience and hemorrhage danger to patient.Provisional filter is invented, and can not only play the effect of prevention pulmonary infarction, can avoid again the risk of itself bringing out thrombosis simultaneously.Insert provisional filter in the acute stage of patient's deep vein thrombosis of lower extremity, and after acute stage, taken out again when the risk of thrombus breaks loose reduces.
The patent No. is that the Chinese patent of ZL 03266456.7 discloses a kind of vena cava filter, it is made up of filter house, fixed part, guide part, described filter house is formed by the top gathering of some one metal wires, this filter house is fixed by metal cap or metal tube, end wiry is dispersed, overall structure is umbrella, and wherein a few one metal wire forms fixed part, and another a few one metal wire forms guide part.Although above-mentioned patent can play the effect of catching thrombosis, but because it is as fixed part by a few one metal wire, so its integrally-built rigidity is larger, shrinkage is poor, easy displacement, to come off, and because end wiry directly contacts with blood vessel, so it may cause damage to a certain degree to blood vessel.Therefore a kind of structure more preferably vena cava filter is needed.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of with blood vessel wall good fit, and can prevent the vena cava filter come off that is shifted, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of vena cava filter, comprise the net cylinder of the column with the braiding of shape memory silk thread, the filtration for filtering thrombosis is provided with in described net cylinder, described filtration comprises multiple shaft-like filter element, one end of described filter element is connected with net cylinder inwall, and the other end is connected with a union joint.
Preferably, the filtration in described net cylinder is provided with two groups, and the filter element on two groups of filtrations staggers mutually.
Preferably, described filter element is all perpendicular to the axis of net cylinder, and described filter element is stage clip.
Further, a hollow stem and a sliding bar is also comprised in described net cylinder, one end of described hollow stem is connected with net cylinder inwall, one end of described sliding bar is connected with union joint, the other end is arranged in hollow stem, and described compression spring sleeve is on described sliding bar and between union joint and hollow stem.
Further, be provided with the brace of multiple oblique setting in described net cylinder, one end of described brace is connected with union joint, and the other end is connected with net cylinder inwall.
Further, the connecting rod of an axis is provided with in described net cylinder, described connecting rod is provided with two sliding sleeves, multiple flexible support component is connected with between two sliding sleeves, extension spring is connected with between two sliding sleeves, described extension spring is enclosed within connecting rod, and described support member supports is at net cylinder inwall, and one end and the union joint of described connecting rod fix.
Preferably, the end of described net cylinder is provided with outside flange.
Preferably, described shape memory silk thread is nitinol alloy wire.
As mentioned above, vena cava filter of the present invention, has following beneficial effect:
The present invention adopts net barrel structure, described net cylinder uses nitinol alloy wire braiding to form, ensure the contact area of the present invention and blood vessel, guarantee that itself and blood vessel have good adherent property, breach vena cava filter in prior art mostly to be rigid backbone and to establish barbed design limit, avoid displacement, drop to cardiopulmonary, severe complication that fracture, caval vein perforation etc. cause.Meanwhile, the present invention is a kind of retrievable vena cava filter, can conveniently be implanted by union joint and take out.Net barrel structure of the present invention makes vena cava filter can deformation, and then adapts to the shape of blood vessel, can also be punctured into less diameter put into conveyer device when implanting and take out.
The present invention uses nitinol alloy wire mesh grid cylinder, and this knitting skill is at industrial circle comparative maturity, and especially at medical device industry, therefore, production and processing of the present invention does not need newly added equipment, greatly reduces cost.
Accompanying drawing explanation
Fig. 1 is basic structure schematic diagram of the present invention.
Fig. 2 is a kind of preferred implementation schematic diagram of the present invention.
Fig. 3 is the side view of Fig. 2.
Fig. 4 is filter element structure chart in Fig. 2.
Fig. 5 is a kind of preferred implementation schematic diagram of the present invention.
Fig. 6 is the fundamental diagram of embodiment in Fig. 5.
Fig. 7 is a kind of preferred implementation schematic diagram of the present invention.
Fig. 8 is the sectional view of Fig. 7.
Fig. 9 is a kind of preferred implementation schematic diagram of the present invention.
Figure 10 is a kind of preferred implementation schematic diagram of the present invention.
In figure: 1 net cylinder 11 flange 2 filter element
21 brace 3 union joint 41 hollow stems
42 sliding bar 5 connecting rod 51 sliding sleeves
52 support component 53 extension spring 54 fixed covers
6 thrombosis
Detailed description of the invention
The structure that Figure of description illustrates, ratio, size etc., content all only in order to coordinate description to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, is not affecting under effect that the present invention can produce and the object that can reach, and all should still drop in scope that disclosed technology contents can contain.Simultaneously, quote in this description as " on ", D score, "front", "rear", the term such as " centre ", also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Be illustrated in figure 1 vena cava filter of the present invention, comprise the net cylinder 1 of the column with the braiding of shape memory silk thread, described net cylinder 1 has elasticity, the filtration for filtering thrombosis is provided with in described net cylinder 1, described filtration comprises multiple shaft-like filter element 2, and one end of described filter element 2 is connected with net cylinder inwall, and the other end is connected with a union joint 3, gap between adjacent head parts 2 can allow blood flow pass through, and can fish for the thrombosis in blood flow.Described union joint 3 is connected with the conveyer device of conveyor chamber vein filter; Union joint 3 described in the present invention is provided with female thread, further facilitates the present invention and coordinates with conveyer device is stable.Filter element 2 in the present invention can have various ways, such as hollow stem, solid hopkinson bar etc.Described filter element 2 one aspect plays the effect of fishing for thrombosis, plays on the one hand the effect that supporting network cylinder 1 prevents the present invention's sliding transfer in the blood vessel.Preferably, the filtration in the present invention has three filter elements 2 at least, wherein preferably number is six.Filtration in the present invention can be arranged on the end of net cylinder 1, also can be arranged on other positions in net cylinder 1.Net cylinder 1 in the present invention can be cylindrical-shaped structure, also can be bellows-like structure as shown in Figure 10, wherein bellows-like structure can reduce net cylinder 1 and the contact area of blood vessel when guaranteeing that the present invention is not shifted, and reduces blood vessel to endothelialization of the present invention.
The first preferred implementation of the present invention is: as shown in Figures 2 and 3, filtration in described net cylinder 1 is provided with two groups, wherein often the stop member 2 organized on filtration is provided with six, as shown in Figure 3, filter element 2 on two groups of filtrations staggers mutually, so that catch the thrombosis in blood flow.In the present embodiment, the structure of two groups of filtrations is identical, and the filter element 2 on each filtration is evenly distributed on one circumferentially.
The second preferred implementation of the present invention is: as shown in Figure 2, and described filter element 2 is all perpendicular to the axis of net cylinder 1, and described filter element 2 is stage clip.By the effect of stage clip, described net cylinder 1 can have radial contraction, and then makes the present invention better can adapt to contraction and the expansion of blood vessel, can not cause very large pressure, also can not even come off by sliding transfer easily to blood vessel wall.Further, in order to ensure working effect, composition graphs 2 and Fig. 4, a hollow stem 41 and a sliding bar 42 is also comprised in described net cylinder 1, one end of described hollow stem 41 is connected with net cylinder inwall, one end of described sliding bar 42 is connected with union joint 3, and the other end is arranged in hollow stem 41, and described compression spring sleeve is on described sliding bar 42 and between union joint 3 and hollow stem 41.When being out of shape because of the systolic pressure of blood vessel or dilating effect when net cylinder 1, hollow stem 41 and sliding bar 42 can produce relative movement, because the effect of stage clip makes the present invention can be good at matching with blood vessel, ensure adherent property.In addition hollow stem 41 and sliding bar 42 are rigidity, so effectively ensure that the duty of stage clip, can not affect service behaviour of the present invention because of stage clip distortion.In the present embodiment, described multiple filter element 2 is evenly distributed on one circumferentially.In the present embodiment, the separate work of each filter element 2, therefore can adapt to the shape of blood vessel of cross section complexity, for actual operation operation brings great convenience.Filter in present embodiment can arrange two groups.
The third preferred implementation of the present invention is: as shown in Figure 5, and described net cylinder 1 is provided with the brace 21 of multiple oblique setting, and one end of each brace 21 is connected with union joint 3, and the other end is connected with net cylinder inwall.Brace 21 in the present embodiment also has the effect of fishing for thrombosis.Composition graphs 5 and Fig. 6, when the thrombosis 6 in blood flow be not filtered parts 2 stop fish for time, thrombosis 6 can continue flowing along with blood flow, stop by brace 21 pairs of thrombosis 6 and catch further, simultaneously because brace 21 is oblique settings, so thrombosis 6 can move along brace 21, be finally trapped in brace 21 and the angle of net cylinder inwall, then absorbed by blood vessel wall.This design efficiently avoid plays inhibition because thrombosis is trapped in the middle part of blood vessel to blood flow flowing, and avoid because blood vessel center blood flow rate is large, thrombosis is washed away the risk come off again, plays the secondary capturing effect to thrombosis simultaneously.Present embodiment can also reduce the harmful effect produced hemodynamics aspect.
Four kinds of preferred implementations of the present invention are: as shown in Figure 7 and Figure 8, the connecting rod 5 of an axis is provided with in described net cylinder 1, described connecting rod 5 is provided with two sliding sleeves 51, multiple flexible support component 52 is connected with between two sliding sleeves 51, extension spring 53 is connected with between two sliding sleeves 51, described extension spring 53 is enclosed within connecting rod 5, and described support component 53 is supported on net cylinder inwall, and one end and the union joint 3 of described connecting rod 5 fix.Described support component 52 has elasticity in the present embodiment, support component 52 is supported on net cylinder inwall under normal conditions, the meeting contraction distortion when net cylinder 1 is subject to the systolic pressure of blood vessel, and then pressure effect is produced to support component 52, two sliding sleeves 51 can slide respectively to the two ends of connecting rod 5, but because the left and right of extension spring 53, support component 52 still has pressure effect to net cylinder inwall, the effect of supporting network cylinder 1 can be played, and then net cylinder 1 pair of blood vessel wall also just can be allowed to have certain pressure, prevent sliding transfer of the present invention from even coming off, described support component 52 can be provided with multiple, therefore support component 52 also can play the secondary capturing effect to thrombosis.In the present embodiment, described connecting rod 5 is provided with fixed cover 54, and described two sliding sleeves 51 are between union joint 3 and fixed cover 54, and the effect of described fixed cover 54 is that anti-anti-skid sheath 51 is deviate from from connecting rod 5.
As shown in Figure 9, in any embodiment stated on the invention, the end of described net cylinder 1 can be provided with outside flange 11, its effect is the contact area that can subtract small net tube 1 and blood vessel and contact force value, thus reduce blood vessel to the endothelialization speed of net cylinder 1, be convenient to the present invention's recovery in the future.
The silk thread of shape memory described in the present invention is nitinol alloy wire.Described union joint 3 and filter element 2 are also pinch titanium alloy material.
In sum, vena cava filter of the present invention, can solve vena cava filter in prior art and easily come off, to fit illusive problem with blood vessel wall.So the present invention effectively overcomes practical problems more of the prior art thus has very high value and use meaning.
Above-mentioned embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.The present invention also has many aspects can improve under the prerequisite of overall thought, all without prejudice under spirit of the present invention and category, can modify above-described embodiment or change for person skilled in the art scholar.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (8)
1. a vena cava filter, it is characterized in that: the net cylinder (1) comprising the column with the braiding of shape memory silk thread, the filtration for filtering thrombosis is provided with in described net cylinder (1), described filtration comprises multiple shaft-like filter element (2), one end of described filter element (2) is connected with net cylinder inwall, and the other end is connected with a union joint (3).
2. vena cava filter according to claim 1, is characterized in that: the filtration in described net cylinder (1) is provided with two groups, and the filter element (2) on two groups of filtrations staggers mutually.
3. vena cava filter according to claim 1, is characterized in that: described filter element (2) is all perpendicular to the axis of net cylinder (1), and described filter element (2) is stage clip.
4. vena cava filter according to claim 3, it is characterized in that: in described net cylinder (1), also comprise a hollow stem (41) and a sliding bar (42), one end of described hollow stem (41) is connected with net cylinder inwall, one end of described sliding bar (42) is connected with union joint (3), the other end is arranged in hollow stem (41), and described compression spring sleeve goes up at described sliding bar (42) and is positioned between union joint (3) and hollow stem (41).
5. vena cava filter according to claim 4, it is characterized in that: the brace (21) being provided with multiple oblique setting in described net cylinder (1), one end of described brace (21) is connected with union joint (3), and the other end is connected with net cylinder inwall.
6. vena cava filter according to claim 4, it is characterized in that: the connecting rod (5) being provided with an axis in described net cylinder (1), described connecting rod (5) is provided with two sliding sleeves (51), multiple flexible support component (52) is connected with between two sliding sleeves (51), extension spring (53) is connected with between two sliding sleeves (51), described extension spring (53) is enclosed within connecting rod (5), described support component (53) is supported on net cylinder inwall, and one end and the union joint (3) of described connecting rod (5) fix.
7. the vena cava filter according to any one of claim 1-6, is characterized in that: the end of described net cylinder (1) is provided with outside flange (11).
8. vena cava filter according to claim 1, is characterized in that: described shape memory silk thread is nitinol alloy wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768206.9A CN104434340B (en) | 2014-12-12 | 2014-12-12 | Vena cava filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410768206.9A CN104434340B (en) | 2014-12-12 | 2014-12-12 | Vena cava filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104434340A true CN104434340A (en) | 2015-03-25 |
| CN104434340B CN104434340B (en) | 2016-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410768206.9A Active CN104434340B (en) | 2014-12-12 | 2014-12-12 | Vena cava filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN104434340B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105726158A (en) * | 2016-04-19 | 2016-07-06 | 上海形状记忆合金材料有限公司 | Woven type vena cava filter and weaving method |
| CN109199631A (en) * | 2018-09-26 | 2019-01-15 | 李雷 | Inferior caval vein embolism filter |
| CN110916848A (en) * | 2019-10-16 | 2020-03-27 | 先健科技(深圳)有限公司 | Filter device |
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| US20070055365A1 (en) * | 2005-04-28 | 2007-03-08 | The Cleveland Clinic Foundation | Stent with integrated filter |
| WO2009086205A2 (en) * | 2007-12-21 | 2009-07-09 | Abbott Laboratories | Body lumen filter |
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| US20130226222A1 (en) * | 2011-02-28 | 2013-08-29 | Mitchell Donn Eggers | Absorbable Vascular Filter |
| US20140188152A1 (en) * | 2012-12-27 | 2014-07-03 | Cook Medical Technologies Llc | Biodegradable Filter |
| CN203841850U (en) * | 2014-03-31 | 2014-09-24 | 孙媛 | Withdrawable inferior vena cava filter |
| CN204411024U (en) * | 2014-12-12 | 2015-06-24 | 上海形状记忆合金材料有限公司 | Vena cava filter |
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2014
- 2014-12-12 CN CN201410768206.9A patent/CN104434340B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070055365A1 (en) * | 2005-04-28 | 2007-03-08 | The Cleveland Clinic Foundation | Stent with integrated filter |
| WO2009086205A2 (en) * | 2007-12-21 | 2009-07-09 | Abbott Laboratories | Body lumen filter |
| CN101491465A (en) * | 2008-01-21 | 2009-07-29 | 微创医疗器械(上海)有限公司 | Blood vessel filter |
| US20130226222A1 (en) * | 2011-02-28 | 2013-08-29 | Mitchell Donn Eggers | Absorbable Vascular Filter |
| US20140188152A1 (en) * | 2012-12-27 | 2014-07-03 | Cook Medical Technologies Llc | Biodegradable Filter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105726158A (en) * | 2016-04-19 | 2016-07-06 | 上海形状记忆合金材料有限公司 | Woven type vena cava filter and weaving method |
| CN105726158B (en) * | 2016-04-19 | 2017-09-22 | 上海形状记忆合金材料有限公司 | A kind of Weaving type vena cava filter and weaving method |
| CN109199631A (en) * | 2018-09-26 | 2019-01-15 | 李雷 | Inferior caval vein embolism filter |
| CN109199631B (en) * | 2018-09-26 | 2024-02-23 | 李雷 | Inferior vena cava embolic filter |
| CN110916848A (en) * | 2019-10-16 | 2020-03-27 | 先健科技(深圳)有限公司 | Filter device |
| CN110916848B (en) * | 2019-10-16 | 2022-02-22 | 先健科技(深圳)有限公司 | Filter device |
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| CN104434340B (en) | 2016-09-14 |
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