CN216495856U - Absorbable and developable vena cava filter screen - Google Patents
Absorbable and developable vena cava filter screen Download PDFInfo
- Publication number
- CN216495856U CN216495856U CN202122932728.6U CN202122932728U CN216495856U CN 216495856 U CN216495856 U CN 216495856U CN 202122932728 U CN202122932728 U CN 202122932728U CN 216495856 U CN216495856 U CN 216495856U
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- China
- Prior art keywords
- filter
- vena cava
- filter screen
- absorbable
- developable
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- 239000000463 material Substances 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 208000010378 Pulmonary Embolism Diseases 0.000 description 15
- 210000003462 vein Anatomy 0.000 description 14
- 210000001631 vena cava inferior Anatomy 0.000 description 9
- 238000011084 recovery Methods 0.000 description 7
- 208000007536 Thrombosis Diseases 0.000 description 6
- 230000002265 prevention Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 208000004043 venous thromboembolism Diseases 0.000 description 3
- 229920000954 Polyglycolide Polymers 0.000 description 2
- 206010047249 Venous thrombosis Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004633 polyglycolic acid Substances 0.000 description 2
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 206010014522 Embolism venous Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 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
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002463 poly(p-dioxanone) polymer Polymers 0.000 description 1
- 239000000622 polydioxanone Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000004088 pulmonary circulation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 210000000115 thoracic cavity Anatomy 0.000 description 1
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Abstract
The utility model belongs to the technical field of medical treatment, and provides an absorbable and developable vena cava filter screen, which comprises: a screen section; the filter screen part consists of a plurality of filter wires, the filter wires are of arc-shaped structures, and the two ends of each filter wire are thick and the middle of each filter wire is thin; a fixed part; the fixing part consists of a plurality of fixing rods, and one ends of the fixing rods are connected with the filter screen part; and a connecting portion; the connecting part comprises a plurality of barbs, and each fixing rod is fixedly provided with a barb; the filter screen part, the fixing part and the connecting part are all made of absorbable materials. In the utility model, because the two ends of the filter wires are thick and the middle is thin, during absorption, the filter wires are firstly absorbed close to the center of the vena cava filter screen, and then absorbed at the end connected with the fixed part, thereby reducing the occurrence of PE caused by the falling of the filter wires.
Description
Technical Field
The utility model relates to the technical field of medical treatment, in particular to an absorbable and developable vena cava filter screen.
Background
Venous thromboembolism is a common serious disease in the clinic, including venous thrombosis and Pulmonary Embolism (PE), and venous thrombosis enters pulmonary circulation, resulting in the occurrence of PE, and in severe cases, leading to death of patients. PE is the third leading cause of death from cardiovascular disease. About 10 million people die from PE every year in the United states, China has no exact data, and because of the large population base, most primary hospitals lack systematic knowledge on thrombus prevention, and the occurrence of pulmonary embolism in China is far higher than that in China abroad. The Inferior Vena Cava Filter (IVCF) is an effective method to prevent PE.
Current clinical IVCF includes permanent filters, recyclable filters, temporary filters, conversion filters. The permanent filter causes a plurality of serious complications due to long-term retention in the body, the temporary filter needs to retain a recovery rod in the body, the management is not facilitated, foreign matters can be retained in the body of a patient after the conversion of the conversion filter, and the three filters are rarely used clinically. The recyclable filter is currently the most widely used IVCF in clinical use. However, since the patient needs to be re-operated during recovery and not every recoverable filter can be recovered, for many recoverable IVCF's, recovery within a few weeks after standing is recommended; however, the system reviews that the average retrieval rate of a single center is only 34%. Even with dedicated IVCF recovery in a single center, recovery rates are only 43% -60%. IVCF recovery in the general population is often single digit, with a new generation of about 3.5% and Florida of 6.6%. According to the american academy of thoracic physicians (ACCP) VTE prevention guidelines, the maximum recommended VTE prevention time is 35 days. Theoretically, the absorbable filter is an IVCF used for short-term Pulmonary Embolism (PE) prevention (35 days), disappearing after a short PE risk, avoiding the recovery process and long-term complications. Therefore, there is significant clinical value in producing clinically useful ingestible IVCF.
However, in the conventional IVCF, the entire IVCF is loosened and dropped off due to the absorption of the filter portion, resulting in the occurrence of PE.
Disclosure of Invention
Aiming at the problems in the prior art, the technical problems to be solved by the utility model are as follows: in the existing inferior vena cava filter, PE occurs because the filter wire is partially absorbed to cause the inferior vena cava filter to loosen and fall off.
In order to solve the technical problems, the utility model adopts the following technical scheme: an ingestible, developable vena cava screen, comprising: a screen section; the filter screen part is composed of a plurality of filter wires, the filter wires are of arc-shaped structures, and the two ends of each filter wire are thick and the middle of each filter wire is thin; a fixed part; the fixing part consists of a plurality of fixing rods, and one ends of the fixing rods are connected with the filter screen part; and a connecting portion; the connecting part comprises a plurality of barbs, and each fixing rod is fixedly provided with a barb; the filter screen part, the fixing part and the connecting part are all made of absorbable materials.
According to the utility model, as the two ends of the filter wires are thick and the middle is thin, when the fixing part is pressed, the overall diameter of the vena cava filter screen is reduced, then the vena cava filter screen is sent into a vein through the special prop, after the vena cava filter is loosened, the fixing rods of the fixing part are tightly attached to the inner wall of the vein, and meanwhile, the barbs are also tightly attached to the inner wall of the vein, so that the vena cava inferior vein filter is fixed in the vein. After a period of time, the vena cava filter screen can be absorbed, and the thick middle parts of the two ends of the filter wires are thin, so that when the filter wires are absorbed, the filter wires are firstly absorbed and completed near the center of the vena cava filter screen, and the filter wires are absorbed and completed after being connected with the fixing part, so that the PE caused by the falling of the filter wires is reduced.
Preferably, the number of the fixing rods is six, and the fixing rods are distributed in a circular array. Thereby facilitating the installation of the vena cava filter screen.
Preferably, each fixing rod corresponds to three filter wires, one end of each filter wire is fixedly connected with one end of one fixing rod, and the other ends of the three filter wires are sequentially connected with the three fixing rods on the opposite side. The filter screen part is formed by the three filter wires on each filter screen, so that the thrombus can be effectively intercepted.
Preferably, the filter wires connecting the opposite fixing rods have a certain deviation angle α in the vertical direction. Can effectively avoid every filter wire that will two dead levers of subtend be connected to coincide in filter screen portion center through declination alpha, can also increase the net quantity of filter screen to can reduce the area of filter screen net, can effectively increase the thrombus interception efficiency of vena cava filter screen promptly.
Preferably, the fixing portion is coated with a developable coating. The specific location of the inferior vena cava filter can be observed under X-ray by the developable coating.
Preferably, three barbs are uniformly distributed on each fixing rod. The upper, middle and lower positions of the fixing rod can be uniformly fixed through the three barbs.
Preferably, a connecting column is connected between two adjacent fixing rods. The stability of the fixing part can be increased by connecting the columns.
Compared with the prior art, the utility model has at least the following advantages:
1. the probability of filter wire falling off can be reduced. According to the utility model, as the two ends of the filter wires are thick and the middle is thin, when the fixing part is pressed, the overall diameter of the vena cava filter screen is reduced, then the vena cava filter screen is sent into a vein through the special prop, after the vena cava filter is loosened, the fixing rods of the fixing part are tightly attached to the inner wall of the vein, and meanwhile, the barbs are also tightly attached to the inner wall of the vein, so that the vena cava inferior vein filter is fixed in the vein. After a period of time, the vena cava filter screen can be absorbed, and the thick middle parts of the two ends of the filter wires are thin, so that when the filter wires are absorbed, the filter wires are firstly absorbed and completed near the center of the vena cava filter screen, and the filter wires are absorbed and completed after being connected with the fixing part, so that the PE caused by the falling of the filter wires is reduced.
2. The vena cava filter screen can be absorbed and developed. In the utility model, the filter screen part, the fixing part and the connecting part of the vena cava filter are all made of absorbable materials, and can be directly absorbed after a period of time without taking out the vena cava filter. The fixing part is coated with a developable coating. The specific location of the vena cava filter can be observed under X-ray by the developable coating.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
Fig. 1 is a perspective view of an absorbable and developable vena cava filter screen according to an embodiment of the present invention.
Fig. 2 is a top view of an absorbable and developable vena cava screen according to an embodiment of the present invention.
Fig. 3 is a three-dimensional structure diagram of three filter wires provided in the embodiment of the present invention.
Fig. 4 is a front view structural diagram of three filter wires provided in an embodiment of the present invention.
Reference numerals: 1-filter screen part, 11-filter silk, 2-fixing part, 21-fixing rod, 3-connecting part, 31-barb and 4-connecting column.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, embodiments of the present invention are provided: an ingestible, developable vena cava screen, comprising: a filter screen part 1, a fixing part 2 and a connecting part 3; the filter screen part 1 consists of a plurality of filter wires 11, the filter wires 11 are of arc-shaped structures, and the two ends of the filter wires 11 are thick and the middle is thin; the fixed part 2 comprises many dead levers 21, and the one end and the filter screen portion 1 of many dead levers 21 are connected, and further, scribble the developable coating on the fixed part 2. The specific location of the inferior vena cava filter can be observed under X-ray by the developable coating. The connecting part 3 comprises a plurality of barbs 31, and each fixing rod 21 is fixedly provided with the barb 31; the filter screen part 1, the fixing part 2 and the connecting part 3 are all absorbable materials, and in specific implementation, the absorbable material can be one of polydioxanone, polyglycolic acid polymer or polyglycolic acid.
Referring to fig. 1-4, in other embodiments, the number of the fixing bars 21 is six, and the fixing bars 21 are distributed in a circular array. Thereby facilitating the installation of the vena cava filter screen.
Referring to fig. 1 to 4, in another embodiment, each of the fixing rods 21 corresponds to three filter wires 11, one end of each of the three filter wires 11 is fixedly connected to one end of one of the fixing rods 21, and the other end of each of the three filter wires 11 is sequentially connected to the three fixing rods 21 on the opposite side. The filter screen part 1 is formed by the three filter wires 11 on each filter screen, so that the thrombus can be effectively intercepted. Further, in order to effectively increase the thrombus intercepting efficiency of the vena cava filter screen, the filter wires 11 connected to the two fixing rods 21 have a certain declination angle α in the vertical direction. Can effectively avoid every filter wire 11 that will connect two dead levers 21 of subtend to coincide in filter screen portion 1 central authorities through declination alpha, can also increase the net quantity of filter screen to can reduce the area of filter screen net, can effectively increase the thrombus interception efficiency of vena cava filter screen promptly.
Referring to fig. 1 to 4, in another embodiment, three barbs 31 are uniformly distributed on each fixing rod 21. The upper, middle and lower positions of the fixing bar 21 can be uniformly fixed by the three barbs 31.
Referring to fig. 1-2, in another embodiment, a connecting column 4 is connected between two adjacent fixing rods 21. The stability of the fixing part 2 can be increased by the connecting column 4. In specific implementation, the connecting column 4 can be a V-shaped connecting column 4.
The working principle and the using process of the utility model are as follows:
because thin in the middle of 11 both ends of many filter silks are thick, when pressing fixed part 2, the whole diameter of vena cava filter screen diminishes, then send into the vena cava filter screen through special stage property in the vein, loosen the effect of back inferior vena cava filter under the elasticity, closely laminate many dead levers 21 and the vein inner wall of fixed part 2, a plurality of barbs 31 also closely laminate with the vein inner wall simultaneously to this realizes fixing the inferior vena cava filter in the vein.
After a period of time, the vena cava filter screen can be absorbed, and because the two ends of the filter wires 11 are thick and thin, when the vena cava filter screen is absorbed, the filter wires 11 are firstly absorbed and completed near the center of the vena cava filter screen, and the filter wires 11 are absorbed and completed after being connected with the fixing part 2, so that PE (polyethylene) caused by the falling of the filter wires 11 is reduced.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. An absorbable and developable vena cava screen, comprising:
a screen section (1); the filter screen part (1) is composed of a plurality of filter wires (11), the filter wires (11) are of arc-shaped structures, and the two ends of each filter wire (11) are thick and the middle of each filter wire is thin;
a fixed part (2); the fixing part (2) consists of a plurality of fixing rods (21), and one ends of the fixing rods (21) are connected with the filter screen part (1); and
a connecting part (3); the connecting part (3) comprises a plurality of barbs (31), and each fixing rod (21) is fixedly provided with a barb (31);
the filter screen part (1), the fixing part (2) and the connecting part (3) are all made of absorbable materials.
2. An absorbable and developable vena cava screen according to claim 1, characterized in that the number of the fixation rods (21) is six and the fixation rods (21) are distributed in a circular array.
3. An absorbable and developable vena cava filter screen according to claim 2, characterized in that each fixing rod (21) corresponds to three filter wires (11), one end of each of the three filter wires (11) is fixedly connected with one end of one of the fixing rods (21), and the other ends of the three filter wires (11) are connected with the three opposite fixing rods (21) in sequence.
4. An absorbable and developable vena cava screen according to claim 3, characterized in that the filter wires (11) connecting two fixation rods (21) have a certain deflection angle α in the vertical direction.
5. An absorbable and developable vena cava screen according to claim 1, wherein the anchoring portion (2) is coated with a developable coating.
6. The absorbable and developable vena cava filter screen according to claim 1, wherein each fixing rod (21) has three barbs (31).
7. An absorbable and developable vena cava screen according to claim 1, characterized in that a connecting column (4) is connected between two adjacent fixing rods (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122932728.6U CN216495856U (en) | 2021-11-26 | 2021-11-26 | Absorbable and developable vena cava filter screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122932728.6U CN216495856U (en) | 2021-11-26 | 2021-11-26 | Absorbable and developable vena cava filter screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216495856U true CN216495856U (en) | 2022-05-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122932728.6U Expired - Fee Related CN216495856U (en) | 2021-11-26 | 2021-11-26 | Absorbable and developable vena cava filter screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216495856U (en) |
-
2021
- 2021-11-26 CN CN202122932728.6U patent/CN216495856U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220513 |
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| CF01 | Termination of patent right due to non-payment of annual fee |