CN109199631B - Inferior vena cava embolic filter - Google Patents
Inferior vena cava embolic filter Download PDFInfo
- Publication number
- CN109199631B CN109199631B CN201811125499.3A CN201811125499A CN109199631B CN 109199631 B CN109199631 B CN 109199631B CN 201811125499 A CN201811125499 A CN 201811125499A CN 109199631 B CN109199631 B CN 109199631B
- Authority
- CN
- China
- Prior art keywords
- support
- filter
- vena cava
- supporting part
- embolic 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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Links
- 230000003073 embolic effect Effects 0.000 title claims abstract description 47
- 210000001631 vena cava inferior Anatomy 0.000 title claims abstract description 18
- 210000004204 blood vessel Anatomy 0.000 claims abstract description 24
- 238000011084 recovery Methods 0.000 claims abstract description 23
- 230000002439 hemostatic effect Effects 0.000 claims abstract description 3
- 239000003351 stiffener Substances 0.000 claims 2
- 230000002792 vascular Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000008280 blood Substances 0.000 description 5
- 210000004369 blood Anatomy 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 208000005189 Embolism Diseases 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 210000001147 pulmonary artery Anatomy 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 208000010378 Pulmonary Embolism Diseases 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000001727 in vivo Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
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
- 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
- A61F2/011—Instruments for their placement or removal
-
- 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
- A61F2002/016—Filters implantable into blood vessels made from wire-like elements
Abstract
The present disclosure relates to a inferior vena cava embolic filter, comprising an annular support (11) for supporting an inner wall of a hemostatic tube and a filter screen (12) disposed on both sides of the annular support, the annular support comprising a first support (111) and a second support (112) releasably connected to the first support, the first support and the second support being disposed along a blood vessel, and the first support and the second support being provided with a recovery member (14) respectively. Through above-mentioned technical scheme, when retrieving the inferior vena cava embolic filter that this disclosure provided, can make first supporting part and second supporting part each other release through the mode of releasing in advance, namely divide into two independent parts with the filter along the junction of two, then retrieve it respectively through retrieving piece on first supporting part and the second supporting part, like this, the area of contact with the vascular wall when can reducing retrieving an integral filter to be convenient for retrieve.
Description
Technical Field
The present disclosure relates to the technical field of medical devices, and in particular, to a inferior vena cava embolic filter.
Background
In order to prevent embolic material in the blood of the inferior vena cava from moving randomly in a blood vessel to enter a pulmonary artery and further cause pulmonary artery embolism, an embolic filter is usually placed in the blood vessel to filter the active embolic material, so that the embolic material is prevented from entering the pulmonary artery system, and the embolic filter is recovered after the risk of pulmonary embolism is relieved. The existing embolic filter is mostly in umbrella-shaped structure, in order to ensure the stability of the embolic filter in the blood vessel during implantation and in vivo, the structure of the embolic filter is designed to increase the contact area between the embolic filter and the inner wall of the blood vessel, and a barb structure is arranged to prevent displacement, but after the design, the contact part of the embolic filter and the inner wall of the blood vessel is easy to be locked with the inner wall of the blood vessel, i.e. the embolic filter is tightly attached to the inner wall of the blood vessel, thereby causing difficulty in recovering the embolic filter.
Disclosure of Invention
It is an object of the present disclosure to provide a inferior vena cava embolic filter that can be easily retrieved while being implanted and not prone to tilting during the body.
In order to achieve the above object, the present disclosure provides a vena cava embolic filter, comprising an annular supporting portion for supporting an inner wall of a hemostatic tube and a filter screen disposed at both sides of the annular supporting portion, the annular supporting portion comprises a first supporting portion and a second supporting portion releasably connected to the first supporting portion, the first supporting portion and the second supporting portion are disposed along a blood vessel, and recovery members are disposed on the first supporting portion and the second supporting portion, respectively.
Optionally, the first support and the second support are interference fit.
Optionally, the filter screen is formed as an umbrella-like structure tapering in a direction away from the annular support, and a small end of the umbrella-like structure is connected with the recovery member.
Optionally, the umbrella structure has an arcuate outer profile, and the filter further comprises a bracket having a plurality of support ribs disposed circumferentially spaced apart, each of the support ribs being connected between an outer edge of the annular support portion and a small end of the umbrella structure and extending within the filter screen.
Optionally, the recycling piece is a recycling hook.
Optionally, the annular support is formed as a mesh structure.
Optionally, the filter screen has a central boss and an edge boss disposed around the central boss, and the recovery member is disposed on the central boss.
Optionally, the edge projection extends around the central projection in a wave shape.
Optionally, a reinforcing rib is arranged between the central protruding portion and the outer edge of the annular supporting portion, the central protruding portion is of a conical structure, and the reinforcing rib and a bus of the conical structure are collinear.
Optionally, the filter screens on two sides of the annular supporting portion are symmetrically arranged with respect to the annular supporting portion.
Through above-mentioned technical scheme, when retrieving the inferior vena cava embolic filter that this disclosure provided, can make first supporting part and second supporting part each other through the tripping means in advance, promptly divide into two independent parts with the filter along the junction of two, then retrieve it respectively through retrieving piece on first supporting part and the second supporting part, like this, the area of contact with the vascular wall when can reducing to retrieve an integral filter, thereby be convenient for retrieve, and under the same circumstances, can design the axial length of extension embolic filter, thereby increase the area of contact with the vascular wall, make this embolic filter implant and be difficult for the slope in the body period, the recovery period is long.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a schematic illustration of a inferior vena cava embolic filter positioned in a blood vessel, provided in accordance with an exemplary embodiment of the disclosure;
FIG. 2 is a cross-sectional view of FIG. 1 (filter screen not shown);
FIG. 3 is a schematic view of a configuration of a inferior vena cava embolic filter provided by another exemplary embodiment of the disclosure;
FIG. 4 is a cross-sectional view of FIG. 3;
fig. 5 is a schematic view of a structure of a inferior vena cava embolic filter provided in accordance with yet another exemplary embodiment of the disclosure.
Description of the reference numerals
11. Annular supporting part 12 filter screen
13. Recovery piece for bracket 14
111. First support 112 second support
121. Center boss 122 edge boss
123. Reinforcing rib 20 blood vessel
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In this disclosure, unless otherwise indicated, terms of orientation such as "inner" and "outer" are used with respect to the contour of the respective component parts themselves. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are used for distinguishing one element from another and not for sequential or importance. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated.
Referring to fig. 1, the present disclosure provides a inferior vena cava embolic filter, comprising an annular supporting portion 11 for abutting against an inner wall of a blood vessel, and a filter screen 12 provided at both sides of the annular supporting portion 11, the annular supporting portion 11 being adapted to abut against an inner wall of the blood vessel in a circumferential direction, capable of preventing the filter from being inclined with respect to the inner wall of the blood vessel to form a gap allowing an embolism to pass, i.e., an outer diameter of the annular supporting portion 11 is approximately equal to a diameter of the blood vessel 20, and the filter screen 12 being adapted to filter the embolism in blood from entering a pulmonary artery or the like together with the blood. Wherein the annular supporting portion 11 includes a first supporting portion 111 and a second supporting portion 112 detachably connected to the first supporting portion 111, the opening of the screen 12 is the same as the diameter of the annular supporting portion 11 to filter plugs as many as possible, the first supporting portion 111 and the second supporting portion 112 are disposed along the blood vessel, and recovery members 14 are provided on the first supporting portion 111 and the second supporting portion 112, respectively. By designing the annular support portion 11 to be releasable first support portion 111 and second support portion 112, the contact area between the annular support portion 11 and the inner wall of the blood vessel can be reduced when the embolic filter is recovered, so that the resistance caused by the inner wall of the blood vessel to the annular support portion 11 when recovered is reduced, and the first support portion 111 and second support portion 112 after release still have sufficient radial support areas, and the inclination of the two relative to the blood vessel 20 can be prevented when recovered respectively.
Thus, when the inferior vena cava embolic filter provided by the present disclosure is recovered, the first supporting part 111 and the second supporting part 112 can be separated from each other in advance by a separation manner, i.e., the filter is divided into two independent parts along the junction of the two parts, and then the two parts are recovered by the recovery pieces 14 on the first supporting part 111 and the second supporting part 112, respectively, so that the contact area with the vessel wall when one integral filter is recovered can be reduced, thereby facilitating the recovery, and in the same case, the axial length of the embolic filter can be designed to be prolonged, thereby increasing the contact area with the vessel wall, so that the embolic filter can ensure that the filter is not easy to incline during implantation and in vivo, and the recovery period is long.
Specifically, in the present embodiment, the first supporting portion 111 and the second supporting portion 112 may be connected by interference fit, i.e. are sleeved or plugged with each other, and are connected by friction force therebetween, and can be released only by overcoming static friction force therebetween when recovering. In other embodiments, the first support 111 and the second support 112 may be further connected by a suture, and a plurality of releasing points may be disposed on the suture, so that an unlocking section of the suture may be connected to the recovering member 14, so that when the recovering member 14 is driven by the recovering system, the unlocking of the suture may be triggered first, so as to control the releasing points to release, thereby realizing the releasing of the first support 111 and the second support 112. The first support part 111 and the second support part 112 may be separated by various releasing means such as electrolytic releasing, mechanical releasing, etc., which is not limited in the present disclosure.
According to the embodiment provided in the present disclosure, as shown in fig. 1, the screen 12 is formed in an umbrella-like structure tapered in a direction away from the annular supporting portion 11, and a recovery member 14 is connected to a small end of the umbrella-like structure. For ease of manufacture and ease of recycling, the screen 12 may be integrally formed with the first support 111 and the second support 112, respectively, and may comprise any suitable material known in the art, such as a flexible permeable membrane of a polymer, metal, or the like. In addition, the screen 12 should have a surface area and mesh size that allow adequate blood volume to pass through to maintain normal blood pressure in the human body and should be designed to avoid pressure build-up as much as possible to prevent mesh rupture.
Referring to fig. 1 and 2, the filter screen 12 of umbrella structure has an arcuate outer contour, and for providing axial support to the annular support 11 and the filter screen 12, the filter may further include a bracket 13, the bracket 13 having a plurality of support ribs disposed at intervals in the circumferential direction, each of the support ribs being connected between the outer edge of the annular support 11 and the small end of the umbrella structure and extending within the filter screen 12. In one embodiment, the bracket 13 may be formed in a conical busbar-like structure and fixedly connected to the screen 12 by stitching, bonding, or the like. In another embodiment, the bracket 13 may be formed into an arc structure, the arc of which is the same as that of the filter screen 12, so that the bracket 13 is integrally attached to the inner sidewall of the filter screen 12 to form a supporting framework of the filter screen 12, and the bracket 13 and the filter screen 12 may be integrally formed, or may be fixedly connected by, for example, bonding, so that the disclosure is not limited thereto.
In the present embodiment, referring to fig. 1, the recovery member 14 may be a recovery hook. The recovery member 14 may be fixedly connected to the filter screen 12 at the apex of the small end by laser bonding or the like, i.e. the recovery member 14 is located on the central axis of the filter screen 12, ensuring that the forces exerted on the filter screen 12 are balanced, preventing both from tilting during recovery. When retrieving the embolic filter, the retrieving member 14 may be connected with guide wires extending to the outside of the body, respectively, and the embolic filter may be removed from two different directions by pulling the guide wires.
In addition, on the premise of meeting the requirement of radially supporting the filter screen 12, as shown in fig. 1, the annular supporting portion 11 may be formed as a net structure, so as to further reduce the contact area with the inner wall of the blood vessel, and facilitate recovery of the embolic filter.
According to another embodiment provided by the present disclosure, referring to fig. 3 and 4, the screen 12 may further have a central boss 121 and an edge boss 122 disposed around the central boss 121, and the recovery member 14 is disposed on the central boss 121. In this way, the forces acting on the filter through the retrieval member 14 upon retrieval of the embolic filter can still be in equilibrium, while the edge protrusions 122 can further prevent embolic filter implantation and tipping during body. In addition, the tip of the recovery member 14 should not exceed the highest protruding point of the edge protruding portion 122 to prevent the recovery member 14 from scratching the inner wall of the blood vessel when the embolic filter is tipped.
Specifically, as shown in fig. 3 and 4, the edge protruding portions 122 extend around the central protruding portion 121 in a wave shape, that is, two adjacent edge protruding portions 122 are also arranged in a wave shape, so that the contact area between the edge protruding portions 122 and the inner wall of the blood vessel can be effectively reduced while the stability of the central protruding portion 121 is ensured, and the resistance applied by the inner wall of the blood vessel during the recovery of the embolic filter is further reduced.
Further, referring to fig. 4, in order to provide elastic support to the edge of the embolic filter, a reinforcing rib 123 may be provided between the central boss 121 and the outer edge of the annular support 11, and the central boss 121 may be of conical structure, the reinforcing rib 123 being collinear with the generatrix of the conical structure. Wherein the reinforcing ribs 123 may be provided in plurality and distributed at intervals in the circumferential direction.
As shown in fig. 1 and 3, in the present embodiment, the filter screens 12 on two sides of the annular supporting portion 11 are symmetrically disposed about the annular supporting portion 11, specifically, the first supporting portion 111 and the second supporting portion 112 are respectively connected with the filter screens 12, and correspondingly, the support 13 may be symmetrically disposed on two sides of the first supporting portion 111 and the second supporting portion 112, which are opposite to each other, so as to respectively support the filter screens 12 on two sides of the annular supporting portion 11. Such a filter structure can further ensure that the plug is filtered out, i.e. equivalent to having two layers of screens 12 in the vessel, when part of the plug passes through the screen 12 on one side of the annular support 11, the screen 12 on the other side thereof will continue to form an obstacle for the plug, preventing it from passing again.
Referring to fig. 5, the present disclosure also provides a vena cava embolic filter in yet another embodiment, in which the annular supporting portion 11 and the filter screen 12 may be formed of a plurality of wire columns of the same diameter, that is, the first supporting portion 111 and the filter screen 12 connected thereto and the second supporting portion 112 and the filter screen 12 connected thereto may be integrally formed, particularly, formed by extending a plurality of wire columns of the same diameter, and finally, sleeved together by the free ends of the first supporting portion 111 and the second supporting column 112. Each wire column constituting the filter screen 12 has a central boss 121 and an edge boss 122, thereby ensuring that the embolic filter is implanted and not prone to tilting during the body. Because of the thin vein, the gaps among the wire columns of the embodiment are enough to form a mesh for blocking the embolism from passing, so that the embolic filter is simple to manufacture and convenient to use, and can ensure the normal circulation of blood.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (6)
1. A lower vena cava embolic filter, characterized by comprising an annular supporting part (11) for supporting the inner wall of a hemostatic tube and a filter screen (12) arranged at both sides of the annular supporting part (11), wherein the annular supporting part (11) comprises a first supporting part (111) and a second supporting part (112) which is connected with the first supporting part (111) in a releasable way, the first supporting part (111) and the second supporting part (112) are arranged along a blood vessel,
the filter screen (12) is provided with a central protruding part (121) and an edge protruding part (122) arranged around the central protruding part (121), the recovery piece (14) is arranged on the central protruding part (121), the top end of the recovery piece (14) does not exceed the highest protruding point of the edge protruding part (122), and the edge protruding part (122) extends around the central protruding part (121) in a wave shape.
2. The inferior vena cava embolic filter of claim 1, wherein the first support (111) and the second support (112) are interference fit.
3. The inferior vena cava embolic filter of claim 1, wherein the retrieval member (14) is a retrieval hook.
4. The inferior vena cava embolic filter according to claim 1, wherein the annular support (11) is formed as a mesh structure.
5. The inferior vena cava embolic filter according to claim 1, wherein a stiffener (123) is provided between the central boss (121) and the outer edge of the annular support (11), the central boss (121) being of conical configuration, the stiffener (123) being collinear with the generatrix of the conical configuration.
6. The inferior vena cava embolic filter according to any of claims 1-5, wherein the sieves (12) on both sides of the annular support (11) are symmetrically arranged about the annular support (11).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125499.3A CN109199631B (en) | 2018-09-26 | 2018-09-26 | Inferior vena cava embolic filter |
| PCT/CN2018/109877 WO2020062330A1 (en) | 2018-09-26 | 2018-10-11 | Inferior vena cava embolism filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811125499.3A CN109199631B (en) | 2018-09-26 | 2018-09-26 | Inferior vena cava embolic filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109199631A CN109199631A (en) | 2019-01-15 |
| CN109199631B true CN109199631B (en) | 2024-02-23 |
Family
ID=64981518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811125499.3A Active CN109199631B (en) | 2018-09-26 | 2018-09-26 | Inferior vena cava embolic filter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109199631B (en) |
| WO (1) | WO2020062330A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110236642A (en) * | 2019-06-18 | 2019-09-17 | 金华职业技术学院 | A kind of bioclastic acquisition method |
| CN116712213B (en) * | 2023-08-03 | 2024-01-19 | 北京心祐医疗科技有限公司 | Combined vena cava filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200980741Y (en) * | 2006-11-13 | 2007-11-28 | 王震 | Vascular inner blocking device |
| US7803171B1 (en) * | 2004-06-14 | 2010-09-28 | Uflacker Renan P | Retrievable inferior vena cava filter |
| CN104434340A (en) * | 2014-12-12 | 2015-03-25 | 上海形状记忆合金材料有限公司 | Vena cava filter |
| CN207270413U (en) * | 2017-03-08 | 2018-04-27 | 广州启骏生物科技有限公司 | A kind of fixing bracket of vena cava filter |
| CN209377806U (en) * | 2018-09-26 | 2019-09-13 | 李雷 | Inferior caval vein embolism filter |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080275488A1 (en) * | 2007-05-01 | 2008-11-06 | Fleming James A | Extended duration removable medical filter |
| US20120221040A1 (en) * | 2011-02-28 | 2012-08-30 | Mitchell Donn Eggers | Absorbable Vascular Filter |
| US9011479B2 (en) * | 2011-12-16 | 2015-04-21 | Cleve Koehler | Vena cava filter with bidirectional retrieval |
| US9668850B2 (en) * | 2012-07-06 | 2017-06-06 | Cook Medical Technologies Llc | Conical vena cava filter with jugular or femoral retrieval |
| US9820844B2 (en) * | 2014-11-07 | 2017-11-21 | Cook Medical Technologies Llc | Double conical IVC filter |
| CN204394741U (en) * | 2014-12-29 | 2015-06-17 | 钱钧 | A kind of vena cava filter assembly being convenient to take out |
| CN106308974B (en) * | 2015-06-30 | 2018-08-03 | 先健科技(深圳)有限公司 | Filter |
| CN108309506B (en) * | 2018-03-19 | 2023-10-13 | 威海维心医疗设备有限公司 | vena cava filter |
-
2018
- 2018-09-26 CN CN201811125499.3A patent/CN109199631B/en active Active
- 2018-10-11 WO PCT/CN2018/109877 patent/WO2020062330A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7803171B1 (en) * | 2004-06-14 | 2010-09-28 | Uflacker Renan P | Retrievable inferior vena cava filter |
| CN200980741Y (en) * | 2006-11-13 | 2007-11-28 | 王震 | Vascular inner blocking device |
| CN104434340A (en) * | 2014-12-12 | 2015-03-25 | 上海形状记忆合金材料有限公司 | Vena cava filter |
| CN207270413U (en) * | 2017-03-08 | 2018-04-27 | 广州启骏生物科技有限公司 | A kind of fixing bracket of vena cava filter |
| CN209377806U (en) * | 2018-09-26 | 2019-09-13 | 李雷 | Inferior caval vein embolism filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109199631A (en) | 2019-01-15 |
| WO2020062330A1 (en) | 2020-04-02 |
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