CN211325882U - Recoverable vena cava filter and filter system - Google Patents
Recoverable vena cava filter and filter system Download PDFInfo
- Publication number
- CN211325882U CN211325882U CN201920937763.7U CN201920937763U CN211325882U CN 211325882 U CN211325882 U CN 211325882U CN 201920937763 U CN201920937763 U CN 201920937763U CN 211325882 U CN211325882 U CN 211325882U
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- China
- Prior art keywords
- filter
- vena cava
- cava filter
- balance arm
- hook
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- 238000011084 recovery Methods 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 4
- 230000017531 blood circulation Effects 0.000 abstract description 7
- 229910001000 nickel titanium Inorganic materials 0.000 description 5
- 208000010378 Pulmonary Embolism Diseases 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 206010051055 Deep vein thrombosis Diseases 0.000 description 2
- 208000007536 Thrombosis Diseases 0.000 description 2
- 206010047249 Venous thrombosis Diseases 0.000 description 2
- 239000003146 anticoagulant agent Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000001631 vena cava inferior Anatomy 0.000 description 2
- 102000029749 Microtubule Human genes 0.000 description 1
- 108091022875 Microtubule Proteins 0.000 description 1
- 241000722921 Tulipa gesneriana Species 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 229940127219 anticoagulant drug Drugs 0.000 description 1
- 235000005770 birds nest Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 231100000518 lethal Toxicity 0.000 description 1
- 230000001665 lethal effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000004688 microtubule Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 description 1
- 230000004088 pulmonary circulation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000002537 thrombolytic effect Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 235000005765 wild carrot Nutrition 0.000 description 1
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Abstract
The utility model relates to a recoverable vena cava filter and filter system, including retrieving hook, a tip with many of recovery hook looks fixed connection filter the pole, recoverable vena cava filter still include a tip with many balance arms of recovery hook looks fixed connection, another tip of balance arm with filter the pole setting that slides mutually. The utility model discloses a filter's stability is good, also can prevent under the continuous impact of blood flow that asymmetric (deformation) and slope scheduling problem from appearing in the filter, reduces the emergence of operation risk and complication.
Description
Technical Field
The utility model belongs to vena cava vessel intervention apparatus, in particular to a recoverable vena cava filter and filter system.
Background
Deep venous thrombosis (DvT) is a common clinical disease and is also the leading cause of pulmonary artery embolism (PE), with high mortality and disability rate. The placement of the inferior vena cava filter (worker vcF) is effective in preventing pulmonary embolism, and the basic principle is to trap large lethal emboli by a filter mesh placed in the vena cava to prevent them from entering the pulmonary circulation. The use of venous filters is now becoming more widespread, and in order to improve the effectiveness of the filters, to reduce the effects of complications and to make thrombolytic therapy safer, new designs for filters or modifications and improvements to existing filters are continually being proposed.
At present, the vena cava filter applied in clinic is generally made of Ni-Ti (nickel titanium) shape memory alloy by utilizing a metal wire weaving process or a microtubule laser engraving process to be a self-expanding filter, the shape of the self-expanding filter is like an umbrella or a bird nest which is opened, and the self-expanding filter is transported by a catheter and implanted into the vena cava. Vena cava filters can be classified into permanent filters and temporary filters, depending on how long the filter is retained in the body.
Permanent filters are widely used and are fixed on the wall of a blood vessel after being implanted into a vena cava along with the life of a patient, but the filters are kept in the body as foreign matters for a long time and can cause serious complications such as displacement, perforation of the vena cava, local thrombosis, blockage of the inferior vena cava and the like; the long-term or even lifetime administration of anticoagulants by the use of permanent filters is inconvenient for many patients, especially young patients.
The recyclable filter overcomes the defects to a certain extent, does not need to be fixed and taken out by an external device, and can be taken out by grabbing and other methods after being placed in a body for a certain time. Because the recyclable filter has the characteristics of an ideal filter and has low complications, RIVCF is put into use in Europe in 1992 and formally obtained application approval of the FDA in the United states in 2003, and the clinical application is more extensive, which becomes one of the main measures for preventing the occurrence of PE.
The currently used recoverable filter includes G ǜ nth Tulip filter, Optease filter, Recovery filter, ALN filter, etc.
However, the filters on the market generally have the problem of instability, and are easy to have the problems of asymmetry, inclination and the like under the impact of blood flow, so that the surgical risks and complications are easy to bring about.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a recoverable vena cava filter and filter system that stability is good.
In order to solve the technical problems, the invention adopts the following technical scheme:
an object of the utility model is to provide a recoverable vena cava filter, including retrieving hook, a tip with many of retrieving hook looks fixed connection filter the pole, recoverable vena cava filter still include a tip with many balance arms of retrieving hook looks fixed connection, another tip of balance arm with filter the pole setting that slides mutually.
The utility model discloses a set up the balance arm, when the filter was implanted, the balance arm can control opening of filtering the pole, and has excellent stability after making the filter implant, under the continuous impact of blood flow, also can prevent that asymmetric (deformation) and slope scheduling problem from appearing in the filter to reduce operation risk and complication.
Specifically, the recyclable vena cava filter further comprises a connecting piece, the other end of the balance arm is rotatably connected with the connecting piece, and the filter rod is in sliding connection with the connecting piece, so that the opening angle of the filter rod can be freely adjusted according to the size of the diameter of a blood vessel when the filter is implanted, and different filter diameters are realized.
Preferably, the balance arm is formed by splicing a plurality of wires, so that the supporting force of the balance arm is stronger.
Further preferably, the wire is an elastic memory wire, so that the balance arm can be opened and closed, and the implantation and the recovery of the filter are convenient.
Further preferably, each balance arm is formed by splicing 3-6 wires, so that the supporting force and the opening and closing capacity are better considered.
Preferably, the number of balance arm be 6~12, the number of filter pole be 6~12 to the thrombus that can be better is filtered, also can not produce big interference to the blood flow.
Preferably, the filter rod is made of elastic memory alloy, so that the filter rod can be opened and closed, and implantation and recovery of the filter are facilitated.
In the present invention, the elastic memory material includes but is not limited to nitinol.
Preferably, the projection of the balance arm and the filter rod on a plane perpendicular to the axis of the recyclable vena cava filter forms an included angle, so that when the filter is opened and closed, the interference or self-locking between the balance arm and the filter rod is avoided, and the operation is facilitated.
Preferably, retrieve the tubular metal resonator of hook for having the cavity, balanced arm one end with the tubular wall looks fixed connection of tubular metal resonator, the fixed setting of a tip of filter rod be in the tubular cavity of tubular metal resonator in to make the external diameter of filter less, not only the wound that causes for the patient when the operation is little, when retrieving simultaneously, because balanced arm retrieves earlier, and then drives the filter rod and retrieve, thereby reduce the damage of filter rod and barb to the tubular wall, be favorable to patient's recovery.
Preferably, the recyclable vena cava filter further comprises barbs arranged at the tail ends of the filter rods and facing the outside of the filter, so that the filter can be better fixed in a blood vessel, and the risk of displacement of the filter caused by blood flow impact is effectively reduced.
It is another object of the present invention to provide a filter system comprising a recyclable vena cava filter as described above.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
the utility model discloses a filter's stability is good, also can prevent under the continuous impact of blood flow that asymmetric (deformation) and slope scheduling problem from appearing in the filter, reduces the emergence of operation risk and complication.
Drawings
FIG. 1 is a perspective view of an embodiment of a colander in an open position;
FIG. 2 is a top view of an embodiment of a colander in an open position;
FIG. 3 is a perspective view of an embodiment of a retrieval hook;
FIG. 4 is a schematic view of the attachment of the balance arm to the filter rod;
FIG. 5 is a schematic view of the barb configuration;
wherein, 1, a recovery hook; 2. a filter rod; 3. a balance arm; 4. a barb; 5. a connecting member.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It is to be understood that these embodiments are provided to illustrate the basic principles, main features and advantages of the present invention, and the present invention is not limited by the following embodiments.
The utility model provides a filter system, including recoverable vena cava filter and sheath pipe etc.. The main improvement of the utility model is that the vena cava filter can be recovered, and other parts of the filter system can adopt the structure in the prior art.
As shown in fig. 1 to 2, the recyclable vena cava filter includes a recycling hook 1, a plurality of filter rods 2 having one end fixedly connected to the recycling hook 1, a plurality of balance arms 3 having one end fixedly connected to the recycling hook 1, and barbs 4 (shown in fig. 5) provided at the ends of the filter rods 2 and facing the outside of the filter, and the other ends of the balance arms 3 are slidably provided with the filter rods 2.
In this embodiment, the balance arm 3 and the filter rod 2 are slidably disposed through the connecting member 5 (as shown in fig. 4), the other end of the balance arm 3 is rotatably connected to the connecting member 5, and the filter rod 2 is slidably connected to the connecting member 5, so that when the filter is implanted into a blood vessel, a doctor controls the balance arm 3 to open the filter rod 2, and when the filter is retracted, the balance arm 3 is first retracted into the sheath, and the retraction of the balance arm 3 drives the retraction of the filter rod 2.
The recovery hook 1 is a metal tube with a cavity (as shown in fig. 3), one end of the balance arm 3 is fixedly connected with the tube wall of the metal tube by plasma welding, one end of the filter rod 2 is fixedly arranged in the tube cavity of the metal tube, and the filter rod 2 extends out from the lower end of the metal tube, so that the filter rod 2 is positioned below the balance arm 3. The filter rods 2 and the balance arms 3 are evenly distributed along the circumference of the filter.
As shown in fig. 2, which is a block diagram of the filter projected on a plane perpendicular to the axis of the recoverable vena cava filter, it can be seen that the balance arm 3 and the filter rod 2 form an angle with respect to the projection on this plane.
The balance arm 3 is formed by splicing 3-6 wires and is fixed by laser welding or plasma welding, and the wires are elastic memory wires such as nickel-titanium alloy.
The number of the balance arms 3 is 6-12, the number of the filter rods 2 is 6-12, and one balance arm 3 is connected with one filter rod 2.
The material of the filter rod 2 is elastic memory alloy, such as nickel titanium alloy.
The number of the barbs 4 is less than or equal to that of the filter rods 2.
The utility model discloses an external diameter of filter is less, and the wound that not only causes for the patient when the operation is little, is retrieving equally when, because balance arm 3 retrieves earlier, also can reduce the damage to the vascular wall, is favorable to patient's recovery. And, the utility model discloses a 3 structures of balance arm for the filter has excellent stability after implanting, also can prevent that asymmetric (deformation) from appearing in the filter under the continuous impact of blood flow, operation risk and complication that the slope etc. brought.
As described above, the present invention has been explained in full in accordance with the spirit of the present invention, but the present invention is not limited to the above-described embodiments and implementation methods. The practitioner of the related art can make various changes and implementations within the scope permitted by the technical idea of the present invention.
Claims (7)
1. The utility model provides a recoverable vena cava filter, including retrieve hook (1), one end with retrieve a plurality of filter rods (2) of hook (1) looks fixed connection, its characterized in that: the recyclable vena cava filter further comprises a plurality of balance arms (3) of which one end parts are fixedly connected with the recyclable hook (1), and the other end parts of the balance arms (3) are arranged with the filter rod (2) in a sliding way; the balance arm (3) is formed by splicing 3-6 wires; the wire is an elastic memory wire; the filter rod (2) is made of elastic memory alloy.
2. The retrievable vena cava filter according to claim 1, wherein: the recyclable vena cava filter further comprises a connecting piece (5), the other end of the balance arm (3) is rotatably connected with the connecting piece (5), and the filter rod (2) is in sliding connection with the connecting piece (5).
3. The retrievable vena cava filter according to claim 1, wherein: the projection of the balance arm (3) and the filter rod (2) on a plane vertical to the axis of the recyclable vena cava filter forms an included angle.
4. The retrievable vena cava filter according to claim 1, wherein: the number of the balance arms (3) is 6-12, and the number of the filter rods (2) is 6-12.
5. The retrievable vena cava filter according to claim 1, wherein: the recovery hook (1) is a metal pipe with a cavity, one end part of the balance arm (3) is fixedly connected with the pipe wall of the metal pipe, and one end part of the filter rod (2) is fixedly arranged in the pipe cavity of the metal pipe.
6. The retrievable vena cava filter according to claim 1, wherein: the recyclable vena cava filter further comprises barbs (4) arranged at the end of the filter rod (2) and facing the outside of the filter.
7. A filter system, characterized by: comprising a retrievable vena cava filter according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937763.7U CN211325882U (en) | 2019-06-21 | 2019-06-21 | Recoverable vena cava filter and filter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937763.7U CN211325882U (en) | 2019-06-21 | 2019-06-21 | Recoverable vena cava filter and filter system |
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| Publication Number | Publication Date |
|---|---|
| CN211325882U true CN211325882U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920937763.7U Active CN211325882U (en) | 2019-06-21 | 2019-06-21 | Recoverable vena cava filter and filter system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211325882U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113143538A (en) * | 2021-01-29 | 2021-07-23 | 内蒙古工业大学 | Recoverable vena cava filter |
| CN113229991A (en) * | 2021-05-31 | 2021-08-10 | 北京华脉泰科医疗器械股份有限公司 | Anti-displacement vena cava filter |
| CN114748210A (en) * | 2022-04-12 | 2022-07-15 | 武汉亚心总医院有限公司 | Vena cava filter |
-
2019
- 2019-06-21 CN CN201920937763.7U patent/CN211325882U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113143538A (en) * | 2021-01-29 | 2021-07-23 | 内蒙古工业大学 | Recoverable vena cava filter |
| CN113143538B (en) * | 2021-01-29 | 2024-05-28 | 内蒙古工业大学 | Recoverable vena cava filter |
| CN113229991A (en) * | 2021-05-31 | 2021-08-10 | 北京华脉泰科医疗器械股份有限公司 | Anti-displacement vena cava filter |
| CN114748210A (en) * | 2022-04-12 | 2022-07-15 | 武汉亚心总医院有限公司 | Vena cava filter |
| CN114748210B (en) * | 2022-04-12 | 2022-11-29 | 武汉亚心总医院有限公司 | Vena cava filter |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20240313 Address after: Rooms 202, 501, and 502, Building 7, No. 188 Fuchunjiang Road, High tech Zone, Suzhou City, Jiangsu Province, 215000 Patentee after: SUZHOU VENMED TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 010051, 49 Aimin street, Xincheng District, the Inner Mongolia Autonomous Region, Hohhot Patentee before: INNER MONGOLIA University OF TECHNOLOGY Country or region before: China Patentee before: SUZHOU VENMED TECHNOLOGY Co.,Ltd. |