CN105361974B - A kind of thrombus filter - Google Patents
A kind of thrombus filter Download PDFInfo
- Publication number
- CN105361974B CN105361974B CN201510929050.2A CN201510929050A CN105361974B CN 105361974 B CN105361974 B CN 105361974B CN 201510929050 A CN201510929050 A CN 201510929050A CN 105361974 B CN105361974 B CN 105361974B
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- CN
- China
- Prior art keywords
- center
- pole
- supporting rod
- filtering table
- thrombus filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00035—Other metals or alloys
- A61F2310/00071—Nickel or Ni-based alloys
Abstract
The invention discloses a kind of thrombus filters, including filtering table, flexible supporting frames and center-pole, the filtering table is retractable structure, the filtering table is connect with the end of the center-pole, the flexible supporting frames are connected to the upper end of the center-pole, and the top of the center-pole is provided with recycling end.The thrombus filter of the present invention is in inferior caval vein fixing-stable, and recyclable surgical procedure is simple, strong from center capacity, is not easy to tilt, thrombus good filtration effect.
Description
Technical field
The present invention relates to medical instruments fields, more particularly, to a kind of thrombus filter.
Background technology
Pulmonary embolism (abbreviation pulmonary embolism Pulmonary Embolism, PE) is due to around deep vein thrombosis or the right heart
The thrombus breaks loose of chamber enters pulmonary circulation, blocks pulmonary artery or its branch, and then a series of of initiation are with pulmonary circulatory function obstacle
Main clinical pathology physiological change, it is serious to cause to die suddenly.Studies have shown that the embolus that PE occurs is caused to be mainly derived from limbs
The thrombus that Deep venou or pelvic veins fall off accounts for the 60%-90% in embolus source.It is possible thereby to below renal vein open horizontal
A thrombus filter is placed at place, i.e. inferior caval vein, is intercepted the free embolus in blood, can effectively be prevented pulmonary embolism PE's
Occur, the technology is just constantly being applied to clinical treatment and is achieving good effect at present.
It can be divided into according to the difference of thrombus filter retention time in vivo：Permanent thrombus filter and recyclable thrombus
Filter.Permanent thrombus filter can only be placed permanently, can not take out, such thrombus filter after a long time placement may
There is corresponding complication, be such as displaced, vena cave perforation, local thrombus is formed, inferior vena cava obstruction etc..Patient needs simultaneously
Take anticoagulant for a long time, this brings significant limitation to the practical application of permanent thrombus filter.Recyclable thrombus
Filter is to start to promote and apply in nearly 15 years, such thrombus filter can be within the certain time after its implantation (generally
14 days) it is taken out from internal, the shortcomings that so as to avoid Permanent implantation thrombus filter.Current recyclable thrombus filter is usually all
It is to be connected with conveyer by screw thread, instrument itself divides substantially two major classes, cone and bird-caging from structure.
Current thrombus filter has numerous limitations；As shown in Figure 1 and Figure 2, the limitation of conical thrombus filter
Property be exactly when the instrument be implanted into inferior caval vein when, since conical instrument is poor from center capacity, the instrument be implanted into inferior caval vein
It is easy to tilt afterwards, after instrument tilts, recycling head is close to vascular wall；In removal process, recycling instrument, which can not be successfully, to be captured back
Head is received, the operation time of instrument recycling can be increased, even results in the reclaimer operation failure of instrument；And the circular cone of single layer structure
The instrument of shape determines the filtering thrombus energy force difference of the instrument of the type；The instrument fixed effect is poor, is easy after instrument implantation
Displacement；As shown in Figure 3, Figure 4, the limitation of bird-caging thrombus filter is exactly the instrument to reinforce the fixation in inferior caval vein
Effect increases the area of the center-pole of device contacts vascular wall, however this be easy to cause endothelium and is covered to climbing for center-pole, is returning
It is easy tearing endothelium during receiving instrument and damages vascular wall, it is not recyclable to even result in instrument.
In short, existing thrombus filter fixes unstable, recyclable surgical procedure trouble, from center energy in inferior caval vein
Force difference, easily tilts, and thrombus filter effect is bad.
In view of drawbacks described above, creator of the present invention obtains this creation finally by prolonged research and practice.
Invention content
The object of the present invention is to provide a kind of thrombus filters, to overcome above-mentioned technological deficiency.
To achieve the above object, the technical solution adopted by the present invention is, provides a kind of thrombus filter, including filtering
Disk, flexible supporting frames and center-pole, the filtering table are retractable structure, and the end of the filtering table and the center-pole connects
It connects, the flexible supporting frames are connected to the upper end of the center-pole, and the top of the center-pole is provided with recycling end.
Preferably, the filtering table includes the fixed link of multiple interconnections and bending, each fixed link is radial
Arrangement sends out simultaneously flare up umbrella from the center of the filtering table.
Preferably, the end of the fixed link is provided with fixed anchor thorn.
Preferably, the end of the fixed link is additionally provided with stop part.
Preferably, the end of the stop part is provided with fixed bulb.
Preferably, the flexible supporting frames include the supporting rod of multiple bendings, each supporting rod is arranged radially, and
Simultaneously flare up umbrella is sent out from the center of the supporting rod.
Preferably, the end of the supporting rod is provided with support anchor thorn, the support anchor is pierced and is flared out, when being compressed
When retract in the supporting rod.
Preferably, the end of the supporting rod is additionally provided with support bulb.
Preferably, the recycling end is the structure of the structure either round end of grasp.
Preferably, equipped with the connector for being connect with conveyer on the recycling end.
Compared with the prior art the beneficial effects of the present invention are：The thrombus filter of the present invention is fixed stably in inferior caval vein
Fixed, recyclable surgical procedure is simple, strong from center capacity, is not easy to tilt, thrombus good filtration effect；The bilayer of the thrombus filter
Structure and grid filtering table, can most preferably filter thrombus, enhance function of the instrument from center, both can guarantee instrument under
It is more steadily fixed on vena cave, and causes not recyclable after capable of preventing instrument from being coated by endothelium, taken into account fixed and recyclable
Balance between two key effects；Recycle end and provided with threaded connector setting so that the release of the thrombus filter and
Reclaimer operation is simple and convenient, can reduce operation time, and fixed bulb, the setting for supporting bulb and stop part can effectively be prevented
Damage of the tampon filter to patient's blood vessel wall.
Description of the drawings
Fig. 1 is position view of the conical thrombus filter in inferior caval vein anatomical structure；
Fig. 2 is the schematic diagram for causing recycling to fail after conical thrombus filter tilts in inferior caval vein anatomical structure；
Fig. 3 is position view of the bird-caging thrombus filter in inferior caval vein anatomical structure；
Fig. 4 is to climb the partial enlarged view covered by vascular wall endothelium at the center-pole B of bird-caging thrombus filter；
Fig. 5 is the stereogram of the thrombus filter of the present invention；
Fig. 6 is the vertical view of the thrombus filter of the present invention；
Fig. 7 is the portions the A enlarged diagram of thrombus filter shown in FIG. 1；
Fig. 8 is the schematic diagram of the thrombus filter of the present invention；
Fig. 9 is the schematic diagram of the another embodiment of the thrombus filter of the present invention；
Figure 10 is position view of the thrombus filter of the present invention in inferior caval vein anatomical structure；
Figure 11 is the protection schematic diagram in the portions C of Figure 10；
Figure 12 is the structural schematic diagram of the recycling end of the thrombus filter of the present invention；
Figure 13 is the schematic diagram of the another embodiment of the recycling end of the thrombus filter of the present invention；
Figure 14 is that the flexible supporting frames of the another embodiment of the thrombus filter of the present invention just into sheath or go out sheath
Status diagram；
Figure 15 be the present invention thrombus filter another embodiment flexible supporting frames most of supporting rod
Through into sheath or going out the status diagram of sheath；
Figure 16 is that the supporting rod end of the flexible supporting frames of the another embodiment of the thrombus filter of the present invention prepares
Into sheath or go out the status diagram of sheath；
Figure 17 is the stereogram of the another embodiment of the thrombus filter of the present invention；
Figure 18 is the portions the D enlarged diagram of the another embodiment of thrombus filter shown in Figure 17.
In figure：1- filtering tables；2- flexible supporting frames；3- center-poles；4- recycles end；5- fixed links；6- fixes anchor thorn；7-
Stop part；8- fixes bulb；9- supporting rods；10- supports anchor thorn；11- supports bulb；12- connectors.
Specific implementation mode
Below in conjunction with attached drawing, the forgoing and additional technical features and advantages are described in more detail.
As shown in Figure 5, Figure 6, a kind of thrombus filter, the thrombus filter include filtering table 1, center-pole 3 and bullet
Property supporting rack 2.Thrombus filter can be made of the material with shape memory function being often used in the industry, in the present invention not
Specific material is defined, as long as being suitable for human body and the material with shape memory function；Thrombus in the present embodiment
Filter is made of Nitinol, specially Hollow Nickel titanium tube, by Hollow Nickel titanium tube raw material after laser engraving, utilizes mould
Tool struts, then carries out heat treatment shaping and obtain thrombus filter, and the filtering table 1 is retractable structure, the filtering table 1 with
The end of the center-pole 3 connects, and the flexible supporting frames 2 are connected to the upper end of the center-pole 3, the top of the center-pole 3
End is provided with recycling end 4；For thrombus filter in inferior caval vein fixing-stable, recyclable surgical procedure is simple, from center capacity
By force, it is not easy to tilt, thrombus good filtration effect.
On the basis of the above embodiment, the filtering table 1 includes the fixed link 5 of multiple interconnections and bending, respectively
The fixed link 5 is arranged radially, and simultaneously flare up umbrella is sent out from the center of the filtering table 1, it is worth noting that, it is practical
Eight fixed links 5 may be used in use to form filtering table 1, but according to mechanical property and filter effect require that 6- can be selected
12 numbers；Each fixed link 5 is nearby divided into two branches diverged at its end, two of adjacent two fixed links 5
Branch reconnects integrally near bending section, is finally pooled on the other end center-pole 3 of filtering table 1, forms mesh shape
Filtering table 1, the filtering table 1 have best filtering thrombus effect.
As shown in Fig. 5, Fig. 6, Fig. 7, on the basis of the above embodiment, the end of the fixed link 5 is provided with fixation
Anchor pierces 6, and the fixation anchor thorn 6 near the end of fixed link 5 is formed by laser engraving, is strutted using corresponding mold and thermally treated
The shape for forming fixed anchor thorn 6 afterwards, to be fixed on the intravascular of patient.
On the basis of the above embodiment, can one or more stop parts 7 be set in the end of each fixed link 5,
It is preferably provided at certain point near fixed anchor thorn 6 to place, preferably can form backstop by the end of laser engraving fixed link 5
Part 7, one of engraving part can be bent to form stop part 7, and the second engraving part is made to extend outwardly to form fixation
Anchor thorn 6, which bends towards flexible supporting frames 2, there is the protection and limitation of stop part 7, enables to fixed 6 thorn of anchor thorn
Enter the certain depth of inferior caval vein vascular wall, ensure that thrombus filter stablizes fixed effect in inferior caval vein, and can prevent
Depth excessive and increased penetrate blood wall risk of the fixed anchor thorn 6 because being pierced into vascular wall.
As shown in Figure 8, Figure 9, on the basis of the above embodiment, one end of flexible supporting frames 2 includes multiple bendings
Supporting rod 9 requires the number that can select 3-6 roots according to mechanical property and specification although four supporting rods 9 can be used
Mesh, supporting rod 9 strut heat treatment shaping using mold after laser engraving by center-pole 3 and form, 9 radial knot of supporting rod
Structure, from center along inclined shaft direction flare up umbrella, the end of supporting rod 9 be basically parallel to flexible supporting frames 2 central axes and in
Core bar 3, flexible supporting frames 2 help to enhance thrombus filter from center capacity, as shown in Figure 10, Figure 11, to anti-hemostasis
Bolt filter is implanted into inferior caval vein rear-inclined.
As shown in Fig. 5, Fig. 6, Figure 12, Figure 13, Figure 14, Figure 15, Figure 16, on the basis of the above embodiment, center-pole 3
The one end that do not cut part and form recycling end 4 on top, the other end of recycling end 4 form anchor by laser engraving at hook-like groove
The recycling end 4 of hook structure, the recycling end 4 that the hook-like groove is arrested using recycling instrument are conducive to one section of thrombus filter implantation
Recycling again after time, it is preferable that can also be by 4 laser engraving of recycling end of hook-like groove at recycling 4 interior welds of end dress
The upper threaded connector 12 being connect with conveyer, the connector 12 are conducive to the controlled release operation of thrombus filter.
As shown in Fig. 5, Fig. 8, Fig. 9, Figure 14, Figure 15, Figure 16, on the basis of the above embodiment, the supporting rod 9
End is provided with support anchor thorn 10, and the support anchor thorn 10 is flared out, retracts when compressed in the supporting rod 9,
When laser engraving, the support anchor thorn 10 near the end of the supporting rod 9 of flexible supporting frames 2 will also be gone out by laser engraving, it is preferable that
Support the root of anchor thorn 10 on supporting rod 9, support anchor thorn 10 is strutted tiltedly towards the end of supporting rod 9 using corresponding mold
And thermally treated sizing, into the shape of support anchor thorn 10, support anchor thorn 10 contributes to thrombus filter in inferior caval vein
Stablize and fixes, it, should when the major part of the supporting rod 9 of the flexible supporting frames 2 of thrombus filter comes into sheath or goes out sheath
The tip of support anchor thorn 10 is flared out automatically, is come into the end of the supporting rod 9 of the flexible supporting frames 2 of thrombus filter
Sheath or when going out sheath, support anchor thorn 10 can be automatically withdrawn on supporting rod 9, in the flexible supporting frames 2 of thrombus filter
When the end of supporting rod 9 is in sheath, support anchor thorn 10 is in the same plane with supporting rod 9, support anchor thorn 10
Set-up mode be conducive to the release to thrombus filter and reclaimer operation.
On the basis of the above embodiment such as Fig. 5, Fig. 8, Fig. 9, Figure 17, Figure 18, the stop part 7 of the filtering table 1
End can also make bulb by processing technologys such as hot melts, it is preferable that, can be by the stop part 7 of filtering table 1 when cutting NiTi pipe
End cuts into circle, contributes to end to form fixed bulb 8 when heating processing, the end of the supporting rod 9 can also pass through
The processing technologys such as hot melt make support bulb 11, it is preferable that when cutting NiTi pipe, the end of supporting rod 9 can be cut into circle,
Contribute to end to form support bulb 11 when heating processing, fix bulb 8 and bulb 11 is supported to advantageously reduce thrombus filtering
Device is discharging and the damage to inferior caval vein in removal process.
As shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, in simple terms, the thrombus filter includes mutual
The filtering table 1 of filtering table 1, center-pole 3 and the flexible supporting frames 2 of connection, mesh shape has best filter effect, elasticity
Supporting rack 2 also has from center capacity while preventing thrombus filter to be implanted into inferior caval vein rear-inclined in reinforcement thrombus filter
Help filter a part of thrombus, therefore enhances the ability of thrombus filter filtering thrombus；Thrombus filter takes NiTi pipe one
The technique of body cutting, help to enhance thrombus filter in inferior caval vein from center capacity, the fixation anchor thorn 6 of filtering table 1
It can ensure under the premise of not increasing thrombus filter with vascular wall contact area with the support anchor thorn 10 of flexible supporting frames 2
Thrombus filter inferior caval vein stablize fix, while can prevent again instrument climbed by endothelium cover cause it is not recyclable；Filtering table 1
Stop part 7 can protect and limit filtering table 1 fixation anchor thorn 6 be pierced into the suitable depth of vascular wall, to anti-tampon filter
The fixation anchor thorn 6 of the filtering table 1 of device penetrates the vascular wall of inferior caval vein.The fixation bulb 8 and flexible supporting frames 2 of filtering table 1
Bulb 11 is supported, damage of the thrombus filter to inferior caval vein during implantation and reclaimer operation can be reduced, recycle end 4
The threaded connector 12 of interior welds simultaneously makes thrombus filter be able in the recyclable operation of instrument with the setting of hook-like groove
On the basis of, and the controlled release operation to thrombus filter is not influenced.
The foregoing is merely presently preferred embodiments of the present invention, is merely illustrative for the purpose of the present invention, and not restrictive
's.Those skilled in the art understand that in the spirit and scope defined by the claims in the present invention many changes can be carried out to it,
It changes or even equivalent, but falls in protection scope of the present invention.
Claims (1)
1. a kind of thrombus filter, it is characterised in that：Including filtering table, flexible supporting frames and center-pole, the filtering table is
Retractable structure, the filtering table are connect with the end of the center-pole, and the flexible supporting frames are connected to the center-pole
The top of upper end, the center-pole is provided with recycling end, and the recycling end is the structure of grasp, the recycling inner end portion
With threaded connector, the filtering table includes the fixed link that 6-12 roots are connected with each other and are bent, and each fixed link is in
Radial arrangement, sends out from the center of the filtering table and flare up umbrella, each fixed link are nearby divided into two at its end
The Liang Ge branches of a branch diverged to, adjacent two fixed links reconnect integrally near bending section, are finally pooled to
On the center-pole, the filtering table of mesh shape is formed；The end of the fixed link is provided with fixed anchor thorn and stop part, described
The end of stop part is provided with fixed bulb；The flexible supporting frames include the supporting rod of 3-6 roots bending, and supporting rod is by center-pole
Heat treatment shaping is strutted after laser engraving using mold to form, each supporting rod is arranged radially, and from the support
The center of bar is sent out and flare up umbrella；The end of the supporting rod is provided with support anchor thorn, and support anchor thorn is by supporting rod through swashing
Heat treatment shaping is strutted after light engraving using mold to form, the support anchor thorn is flared out, when compressed described in retraction
In supporting rod, the end of the supporting rod is additionally provided with support bulb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510929050.2A CN105361974B (en) | 2015-12-14 | 2015-12-14 | A kind of thrombus filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510929050.2A CN105361974B (en) | 2015-12-14 | 2015-12-14 | A kind of thrombus filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105361974A CN105361974A (en) | 2016-03-02 |
| CN105361974B true CN105361974B (en) | 2018-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510929050.2A Active CN105361974B (en) | 2015-12-14 | 2015-12-14 | A kind of thrombus filter |
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| CN (1) | CN105361974B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2018013114A (en) * | 2016-04-28 | 2019-03-06 | Shenzhen Kyd Biomedical Tech Co Ltd | Inferior vena cava filter. |
| CN105943197A (en) * | 2016-04-29 | 2016-09-21 | 湖南埃普特医疗器械有限公司 | Vena cava filter |
| CN207220906U (en) * | 2016-12-26 | 2018-04-13 | 杭州唯强医疗科技有限公司 | A kind of filter in implantable intravascular |
| CN106618794A (en) * | 2017-01-06 | 2017-05-10 | 上海宏普医疗器械有限公司 | Octopus-type retrievable vena cava filter |
| CN108272530A (en) * | 2017-03-06 | 2018-07-13 | 上海宏普医疗器械有限公司 | A kind of recyclable Caval vein thrombus filter of double umbellate forms |
| CN108283530A (en) * | 2017-03-07 | 2018-07-17 | 上海宏普医疗器械有限公司 | A kind of octopus type retrievable vena cava filter |
| CN109498206A (en) * | 2018-12-06 | 2019-03-22 | 深圳市科奕顿生物医疗科技有限公司 | Implant recycles instrument and its application and packaging |
| CN110169843B (en) * | 2019-06-20 | 2020-12-29 | 哈尔滨工业大学（威海） | Lotus petal type double-layer point-supported recyclable vena cava filter and manufacturing method thereof |
| CN110811918B (en) * | 2019-11-20 | 2021-11-09 | 湖南埃普特医疗器械有限公司 | Recoverable filter and filter pusher |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6689150B1 (en) * | 1999-10-27 | 2004-02-10 | Atritech, Inc. | Filter apparatus for ostium of left atrial appendage |
| US8353926B2 (en) * | 2004-04-15 | 2013-01-15 | Cordis Corporation | Long-term retrievable medical filter |
| ES2444590T3 (en) * | 2004-09-27 | 2014-02-25 | Rex Medical, L.P. | Venous filter |
| CN101147705A (en) * | 2006-09-18 | 2008-03-26 | 深圳市先健科技股份有限公司 | Controllable released biological ceramic thrombus filter and manufacturing method thereof |
| CN201211253Y (en) * | 2008-04-21 | 2009-03-25 | 王涛 | Novel thrombus filter |
| CN102178569B (en) * | 2011-06-08 | 2013-04-24 | 威海维心医疗设备有限公司 | Controlled release vena cava filter and processing method thereof |
| US8740931B2 (en) * | 2011-08-05 | 2014-06-03 | Merit Medical Systems, Inc. | Vascular filter |
| CN103815984B (en) * | 2014-03-11 | 2016-01-13 | 科塞尔医疗科技（苏州）有限公司 | Thrombus filter delivery system |
| CN203841850U (en) * | 2014-03-31 | 2014-09-24 | 孙媛 | Withdrawable inferior vena cava filter |
| CN104970900B (en) * | 2015-06-26 | 2017-10-17 | 深圳市科奕顿生物医疗科技有限公司 | Recyclable thrombus filter |
-
2015
- 2015-12-14 CN CN201510929050.2A patent/CN105361974B/en active Active
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