CN115634074B - A easily carry vascular filter for pulmonary embolism - Google Patents
A easily carry vascular filter for pulmonary embolism Download PDFInfo
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- CN115634074B CN115634074B CN202211587626.8A CN202211587626A CN115634074B CN 115634074 B CN115634074 B CN 115634074B CN 202211587626 A CN202211587626 A CN 202211587626A CN 115634074 B CN115634074 B CN 115634074B
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- 230000002792 vascular Effects 0.000 title claims abstract description 134
- 208000010378 Pulmonary Embolism Diseases 0.000 title claims abstract description 26
- 238000006731 degradation reaction Methods 0.000 claims abstract description 75
- 230000015556 catabolic process Effects 0.000 claims abstract description 74
- 238000001914 filtration Methods 0.000 claims abstract description 32
- 208000007536 Thrombosis Diseases 0.000 claims abstract description 11
- 230000001154 acute effect Effects 0.000 claims abstract description 8
- 210000004204 blood vessel Anatomy 0.000 claims description 16
- 230000000593 degrading effect Effects 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 210000001147 pulmonary artery Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010008479 Chest Pain Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 208000000616 Hemoptysis Diseases 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000002583 angiography Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000004 hemodynamic effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 230000004796 pathophysiological change Effects 0.000 description 1
- 208000013220 shortness of breath Diseases 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
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Abstract
The invention relates to the technical field of vascular filters, in particular to an easy-to-convey vascular filter for pulmonary embolism, which comprises: the filtering arm is an elastic structure for filtering thrombus; the filter arm includes: the elastic outer supporting arm is arranged along the length direction of the filtering arm, and the filtering net consists of a plurality of elastic supporting arms; the degradation ring is of an annular structure, and one end of the elastic support arm is connected with the degradation ring; the vascular filter has an open state and a folded state; when the vascular filter is in an open state, an included angle between the degradation ring and the cross section of the vascular filter is an acute angle. Through above-mentioned structure can solve effectively that the vascular filter among the prior art lets the vascular filter can't reduce to littleer size because the restriction of degradation ring in transportation, and then leads to the problem that the vascular filter is difficult to the transportation.
Description
Technical Field
The invention relates to the technical field of vascular filters, in particular to a vascular filter easy to convey for pulmonary embolism.
Background
Pulmonary embolism refers to a series of pathophysiological changes and hemodynamic changes caused by endogenous or exogenous emboli entering pulmonary arteries through blood circulation, blocking their branches. The human body has 5 lung lobes and has a strong compensation function, when the pulmonary artery is blocked by 20% instantly, the patient can have no clinical symptoms, and at the moment, the patient can be determined only by an auxiliary imaging examination party such as angiography and the like. When the pulmonary artery is momentarily occluded by 50%, the patient may have significant clinical manifestations such as hemoptysis, shortness of breath, chest pain, etc. When the pulmonary artery is momentarily occluded by 80%, the patient may experience sudden acute death. The high risk period of pulmonary embolism for colleagues is in the first month, so the design of the filter should be to filter large thrombi and a large number of small thrombi, and to ensure a filtering effect more than one month after implantation.
In order to facilitate the delivery of the vascular filter, it is desirable that the vascular filter be as small as possible during delivery. However, for example, publication nos.: the vascular filter disclosed in U.S. Pat. No. 9,763,765b2 can only realize delivery by means of deformation of the elastic filtering arm of the vascular filter during delivery, and the deformation volume of the vascular filter is limited due to the limited deformation amount of the elastic filtering arm and the irreducible deformation of the degradable ring of the vascular filter. Furthermore, the degradation ring limits the radial length of the vascular filter such that the flexible filter arms of the vascular filter do not fold into a plane. The above-mentioned problems lead to a problem that the conventional vascular filter is difficult to deliver.
Disclosure of Invention
The invention aims to provide an easy-to-transport vascular filter for pulmonary embolism, and aims to solve the problem that the vascular filter in the prior art cannot be reduced to a smaller size due to the limitation of a degradation ring in the transport process, so that the vascular filter is difficult to transport. To this end, the present invention provides an easy-to-deliver vascular filter for pulmonary embolism, comprising:
the filtering arm is an elastic structure for filtering thrombus; the filter arm includes: the elastic outer supporting arm is arranged along the length direction of the filtering arm, and the filtering net consists of a plurality of elastic supporting arms;
the degradation ring is of an annular structure, and one end of the elastic support arm is connected with the degradation ring;
the vascular filter has an open state and a folded state; when the vascular filter is in the open state, an included angle between the degradation ring and the cross section of the vascular filter is an acute angle.
Optionally, the degrading ring has a proximal position proximal to the end position of the vascular filter and a distal position distal to the vascular filter;
the filter screen includes: and the length value of the elastic support arms close to the near-end position is smaller than that of the elastic support arms close to the far-end position.
Optionally, in the plurality of elastic support arms, a difference between the longest elastic support arm and the shortest elastic support arm satisfies the following relationship: delta is more than or equal to 0 and less than or equal to pi t/2;
where Δ is the difference between the longest elastic arm and the shortest elastic arm, π is the circumferential ratio, and t is the diameter of the blood vessel filter expected to filter thrombus.
Optionally, in the plurality of elastic support arms, a difference between the longest elastic support arm and the shortest elastic support arm satisfies the following relationship: (pi t +2 phi-pi phi)/8 is more than or equal to delta and more than or equal to (pi t +2 phi-pi phi)/2;
where Δ is the difference between the longest elastic arm and the shortest elastic arm, π is the circumferential ratio, t is the diameter of the vascular filter expected to filter thrombus, and φ is the delivery system inner diameter for delivering the vascular filter. The diameter t of the filter thrombus is expected to be approximately the diameter of the degradation ring in this formula.
Optionally, the plurality of elastic arms located outside the proximal end position and the distal end position are uniformly arranged on the degradation ring in an equal difference manner.
Optionally, the height difference between the adjacent elastic support arms is as follows: between 0mm and 3.2 mm.
Optionally, the elastic support arm is connected with the degradation ring in a sliding manner through a strip-shaped hole at the end of the elastic support arm.
Optionally, in the folded state of the vascular filter, the degradation ring tends to be horizontally disposed along a transport direction of the vascular filter.
Optionally, the two ends of the vascular filter are of a W-shaped structure or a normal-rotation wave structure formed by sequentially connecting the ends of the elastic outer supporting arms.
Optionally, when the number of the elastic support arms is odd, at least two elastic support arms are arranged at the proximal end position or the distal end position of the vascular filter.
Optionally, each of the vascular filters is provided with two filter screens, and the two filter screens are symmetrically arranged on two sides of the vascular filter in the length direction.
Optionally, two degradation rings are respectively arranged on the two filter screens, and the two degradation rings have an angle difference of 180 degrees in the inclination directions of the filter arms.
Optionally, the vascular filter is a self-switching filter, and the degradation ring can be degraded and opened automatically after the filtering task is completed, without additional operation.
When the degradation ring is in a degradation opening state, the filter screen is opened, and the elastic support arm is attached to the blood vessel wall, so that the blood vessel filter loses the filtering function.
The technical scheme of the invention has the following advantages:
1. the invention provides an easy-to-deliver vascular filter for pulmonary embolism, which comprises: the filtering arm is an elastic structure for filtering thrombus; the filter arm includes: the elastic outer supporting arm is arranged along the length direction of the filtering arm, and the filtering net consists of a plurality of elastic supporting arms; the degradation ring is of an annular structure, and one end of the elastic support arm is connected with the degradation ring; the vascular filter has an open state and a folded state; when the vascular filter is in the open state, an included angle between the degradation ring and the cross section of the vascular filter is an acute angle.
In the invention, when the vascular filter is in an open state, the degradation ring with the annular structure is arranged to form an acute angle with the cross section of the vascular filter. Because the filtering arms are of elastic structures, the arrangement of the degrading ring can effectively enable the vascular filter to form a flat surface along the length direction of the vascular filter in a folded state, so that a plurality of elastic supporting arms on the degrading ring are folded together. The elastic support arms are folded together and are positioned on a plane, so that the radial occupied space of the vascular filter in the folded state is smaller. The above structural design can avoid the situation that the degradation ring is arranged along the radial direction of the vascular filter in the prior art. When the vascular filter is in a folded state, the plurality of elastic support arms connected with the degradation ring are restricted by the position of the degradation ring, and the diameter distance of the degradation ring can prevent the plurality of elastic support arms from being attached together. The design can effectively reduce the size of the vascular filter to be smaller, and then the vascular filter is convenient to transport and implant.
2. The invention provides an easy-to-deliver vascular filter for pulmonary embolism, wherein the degradation ring has a proximal position close to the end position of the vascular filter and a distal position far away from the vascular filter; the filter screen includes: the length value of the elastic support arms close to the near-end position is smaller than that of the elastic support arms close to the far-end position.
In the invention, the elastic support arms are arranged to be different in length, the elastic support arm with smaller length is arranged at a position close to the proximal end of the degradation ring, and the elastic support arm with longer length is arranged at a position close to the distal end of the degradation ring. The arrangement can be effectively matched with the degradation ring which is obliquely arranged, so that the vascular filter can be more easily clustered into the vascular filter with smaller radial length in the folding process, and the delivery work of the vascular filter is facilitated. Moreover, the structural design can also ensure that the end part of the vascular filter has no problem of different lengths when the vascular filter is in an open state, thereby ensuring the normal use effect of the vascular filter.
3. The invention provides the easy-to-deliver vascular filter for pulmonary embolism, and a plurality of elastic support arms positioned outside the proximal end position and the distal end position are uniformly arranged on the degradation ring in an equal difference mode.
According to the invention, the elastic support arms are uniformly arranged on the degradation ring in an equidifferent mode, so that the filter screen gap of the filter screen consisting of the elastic support arms can be effectively ensured to meet the design requirement. And ensure that the elastic support arms are mutually closed along a preset track when the vascular filter is in a folded state.
4. According to the easy-to-convey vascular filter for pulmonary embolism, the elastic support arm is connected with the degradation ring in a sliding mode through the strip-shaped hole in the end portion of the elastic support arm.
According to the invention, the strip-shaped hole at the end part of the elastic support arm is connected with the degradation ring in a sliding manner, so that the degradation ring can effectively slide in the strip-shaped hole more smoothly, and the problem that the elastic support arm turns under pressure due to lack of moving space in the process of switching the vascular filter from an open state to a folded state is solved.
5. The easy-to-convey vascular filter for pulmonary embolism provided by the invention has the advantages that in the folded state, the degradation ring tends to be horizontally arranged along the conveying direction of the vascular filter.
In the present invention, by allowing the degradation ring to be horizontal when the vascular filter is in a folded state, the vascular filter can be compressed into a smaller form as much as possible, thereby making the vascular filter easier to transport.
6. The two ends of the vascular filter are of a W-shaped structure or a normal-rotation wave structure formed by sequentially connecting the ends of a plurality of elastic outer supporting arms.
In the invention, the two ends of the vascular filter are designed into W-shaped structures or normal-rotation wave structures, so that the vascular filter can be extruded into smaller shapes in a folded state, the vascular filter is easier to transport, and the W-shaped structures can provide elastic force in the circumferential direction after being unfolded, so that the vascular filter is attached to the wall of a blood vessel.
7. According to the easy-to-convey vascular filter for pulmonary embolism, two filter screens are arranged on each vascular filter, and the two filter screens are symmetrically arranged on two sides of the vascular filter in the length direction.
In the invention, by arranging two filter screens on each vascular filter, the vascular filter with two filter screens can effectively improve the filtering capacity of the vascular filter.
8. According to the easy-to-convey vascular filter for pulmonary embolism, the two degrading rings are arranged on the two filter nets respectively, and the inclination directions of the two degrading rings in the filter arms are different by 180 degrees.
In the invention, two filter screens are arranged on one vascular filter, and two degradation rings are arranged with an inclination direction difference of 180 degrees. Above-mentioned design can be effectively vascular filter under fold condition, guarantees that two degradation rings of vascular filter can not be toppling over the opposite direction pulling of in-process orientation and filtering the arm deformation, and then guarantees that two degradation rings of vascular filter can not interfere each other, makes it accomplish effectively and fold and accomodates the action to above-mentioned design can make vascular filter filtration performance under the open mode more stable.
9. The easy-to-convey vascular filter for pulmonary embolism, provided by the invention, is a self-switching filter, and the degradation ring also has a degradation opening state; when the degradation ring is in a degradation opening state, the filter screen is opened, and the elastic support arm is attached to the blood vessel wall, so that the blood vessel filter loses the filtering function.
The vascular filter provided by the invention is a self-conversion filter, and the design can avoid the fact that medical workers carry out secondary operation to convert the vascular filter, so that the wound risk of the patient after the secondary operation is reduced, and the use experience of the patient is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a vascular filter having a filter mesh according to the present invention;
FIG. 2 is an enlarged view of the connection structure of the elastic support arm and the degradation ring provided by the present invention;
FIG. 3 is a schematic structural diagram of a vascular filter with two filter meshes according to the present invention;
FIG. 4 is a schematic view of the vascular filter of the present invention in a folded state, showing the relative positions of the degradation ring and the resilient arms;
FIG. 5 is a schematic view of the degradable ring of the present invention in a degraded state, with the elastic support arms of the vascular filter attached to the wall of the blood vessel;
FIG. 6 is a schematic view of the connection between the degradation ring and the elastic arm with the strip-shaped hole according to the present invention.
Description of reference numerals:
1-a filter arm; 2-elastic external bracing arm; 3-an elastic support arm; 4-degradation of the ring; 5-proximal position; 6-distal position; 7-strip-shaped holes.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An easily deliverable vascular filter for pulmonary embolism is described, as shown in fig. 1, comprising:
the filtering arm 1 is an elastic structure for filtering thrombus; the filter arm 1 comprises: the filter comprises an elastic outer supporting arm 2 and a filter screen, wherein the elastic outer supporting arm 2 is arranged along the length direction of the filter arm 1, and the filter screen consists of a plurality of elastic supporting arms 3; as shown in fig. 6, the elastic support arm 3 is slidably connected with the degrading ring 4 through a strip-shaped hole 7 at the end part thereof;
the degradation ring 4, as shown in fig. 2, is an annular structure, and one end of the elastic support arm 3 is connected with the degradation ring 4; the vascular filter has an open state and a folded state; in the open state of the vascular filter, the included angle between the degrading ring 4 and the cross section of the vascular filter is an acute angle; as shown in fig. 4, in the folded state of the vascular filter, the degrading ring 4 tends to be horizontally disposed along the transporting direction of the vascular filter. In addition, as shown in fig. 5, the vascular filter is a self-switching filter, and the degradation ring 4 also has a degradation open state; when the degradation ring 4 is in a degradation opening state, the filter screen is opened, and the elastic support arm 3 is attached to the wall of the blood vessel, so that the blood vessel filter loses the filtering function.
In this embodiment, as shown in fig. 2, the degrading ring 4 has a proximal position 5 proximal to the end position of the vascular filter and a distal position 6 distal to the vascular filter; the filter screen includes: a plurality of resilient arms 3 of different lengths, the length of resilient arm 3 adjacent said proximal end location 5 being less than the length of resilient arm 3 adjacent said distal end location 6. And a plurality of said resilient arms 3 located outside said proximal 5 and distal 6 positions are arranged uniformly in an equal manner on said degradation ring 4.
In this embodiment, the difference between the longest elastic arm 3 and the shortest elastic arm 3 among the plurality of elastic arms 3 satisfies the following relationship: delta is more than or equal to 0 and less than or equal to pi t/2; where Δ is the difference between the longest elastic arm 3 and the shortest elastic arm 3, π is the circumferential ratio, and t is the diameter of the blood vessel filter expected to filter thrombus.
In this embodiment, both ends of the vascular filter shown in fig. 1 are W-shaped structures formed by sequentially connecting the ends of the elastic outer supporting arms 2.
Of course, in this embodiment, the relationship between the difference between the longest elastic arm 3 and the shortest elastic arm 3 is not particularly limited, and in other embodiments, the difference between the longest elastic arm 3 and the shortest elastic arm 3 in a plurality of elastic arms 3 satisfies the following relationship: the delta is more than or equal to pi t +2 phi-pi phi/8 and less than or equal to pi t +2 phi-pi phi/2;
where Δ is the difference between the longest elastic arm 3 and the shortest elastic arm 3, π is the circumferential ratio, t is the diameter of the vascular filter intended to filter thrombus, and φ is the delivery system inner diameter for delivering the vascular filter.
Of course, in this embodiment, the number of the elastic arms 3 is not limited in particular, and in other embodiments, when the number of the elastic arms 3 is odd, two elastic arms 3 are provided at the proximal end position 5 or the distal end position 6 of the vascular filter.
Of course, in this embodiment, the shape and structure of the end of the blood vessel filter are not specifically limited, and in other embodiments, the two ends of the blood vessel filter are a normal-rotation wave structure formed by sequentially connecting the ends of the elastic outer supporting arms 2.
Of course, in the present embodiment, the shape of the hole connecting the end of the elastic arm 3 to the degradation ring 4 is not particularly limited, and in other embodiments, the elastic arm 3 is connected to the degradation ring 4 through a circular hole at the end thereof.
Example 2
An easily deliverable vascular filter for pulmonary embolism is described, as shown in fig. 2, comprising:
the filtering arm 1 is an elastic structure for filtering thrombus; the filter arm 1 comprises: the filter comprises an elastic outer supporting arm 2 and a filter screen, wherein the elastic outer supporting arm 2 is arranged along the length direction of the filter arm 1, and the filter screen consists of a plurality of elastic supporting arms 3; in this embodiment, two filter screens are arranged on each vascular filter, and the two filter screens are symmetrically arranged on two sides of the vascular filter in the length direction;
the degradation ring 4, as shown in fig. 2, is an annular structure, and one end of the elastic support arm 3 is connected with the degradation ring 4; the vascular filter has an open state and a folded state; in the open state of the vascular filter, the included angle between the degrading ring 4 and the cross section of the vascular filter is an acute angle; in the folded state of the vascular filter, the degrading ring 4 tends to be arranged horizontally in the transport direction of the vascular filter. In addition, the two filter screens are respectively provided with one degradation ring 4, and the two degradation rings 4 are arranged in the filter arm 1, and the inclination directions thereof have an angle of 180 degrees.
Of course, in this embodiment, the inclination angles of the two opposite degradation rings 4 are not specifically limited, and in other embodiments, the two degradation rings 4 may also differ by other angles.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (7)
1. An easily deliverable vascular filter for pulmonary embolism, comprising:
a filter arm (1) of an elastic construction for filtering thrombi; the filter arm (1) comprises: the filter comprises an elastic outer supporting arm (2) arranged along the length direction of the filter arm (1) and a filter screen consisting of a plurality of elastic supporting arms (3);
the degradation ring (4), the degradation ring (4) is of an annular structure, and one end of the elastic support arm (3) is connected with the degradation ring (4);
the vascular filter has an open state and a folded state; in the open state of the vascular filter, the included angle between the degrading ring (4) and the cross section of the vascular filter is an acute angle;
the degrading ring (4) having a proximal position (5) close to the end position of the vascular filter and a distal position (6) remote from the vascular filter;
the filter screen includes: a plurality of elastic support arms (3) of different lengths, the length of the elastic support arm (3) near the proximal end position (5) being less than the length of the elastic support arm (3) near the distal end position (6); the elastic support arm (3) is connected with the degradation ring (4) in a sliding way through a strip-shaped hole (7) at the end part of the elastic support arm;
among the plurality of elastic support arms (3), the difference between the longest elastic support arm (3) and the shortest elastic support arm (3) satisfies the following relationship: delta is more than or equal to (pi t +2 phi-pi phi)/8 and more than or equal to (pi t +2 phi-pi phi)/2;
wherein, delta is the difference value between the longest elastic support arm (3) and the shortest elastic support arm (3), pi is the circumferential rate, t is the diameter of the blood vessel filter for expecting filtering thrombus, and phi is the inner diameter of the conveying system for conveying the blood vessel filter;
a plurality of said elastic arms (3) for the easy-to-deliver vascular filter for pulmonary embolism, located outside said proximal position (5) and said distal position (6), are uniformly arranged on said degradation ring (4) in an equidifferent manner;
the height difference between the elastic support arms (3) adjacently arranged on the degradation ring (4) is as follows: between 0mm and 3.2 mm.
2. Easy deliverable vascular filter for pulmonary embolism according to claim 1, wherein the vascular filter in the folded state the degrading ring (4) tends to be horizontally arranged in the direction of delivery of the vascular filter.
3. The easy-to-deliver vascular filter for pulmonary embolism according to claim 1, wherein the two ends of the vascular filter are sequentially connected by the ends of a plurality of elastic outer support arms (2) to form a W-shaped structure or a normal-rotation wave structure.
4. The transportable vascular filter for pulmonary embolism according to claim 1, wherein at least two elastic arms (3) are provided at a proximal position (5) or a distal position (6) of the vascular filter when the number of elastic arms (3) is odd.
5. The easy-to-deliver vascular filter for pulmonary embolism according to claim 1, wherein two filtering meshes are arranged on each vascular filter, and the two filtering meshes are symmetrically arranged on two sides of the length direction of the vascular filter.
6. The transportable vascular filter for pulmonary embolism according to claim 5, wherein one degradation ring (4) is disposed on each of the two filter meshes, and the two degradation rings (4) are inclined at an angle of 180 degrees within the filter arm (1).
7. The deliverable vascular filter for pulmonary embolism according to claim 1, wherein the degradation ring (4) further has a degradation open state;
when the degradation ring (4) is in a degradation opening state, the filter screen is opened, and the elastic support arm (3) is attached to the blood vessel wall, so that the blood vessel filter loses the filtering function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211587626.8A CN115634074B (en) | 2022-12-12 | 2022-12-12 | A easily carry vascular filter for pulmonary embolism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211587626.8A CN115634074B (en) | 2022-12-12 | 2022-12-12 | A easily carry vascular filter for pulmonary embolism |
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| CN115634074A CN115634074A (en) | 2023-01-24 |
| CN115634074B true CN115634074B (en) | 2023-03-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102743241A (en) * | 2012-07-27 | 2012-10-24 | 首都医科大学宣武医院 | Novel deformable non-axial-flow vene 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 |
| WO2021230871A1 (en) * | 2020-05-14 | 2021-11-18 | Dignity Health | Systems and methods for spinal realignment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1430839B1 (en) * | 2001-09-28 | 2009-06-10 | Kanji Inoue | Free thrombus capturing tool |
| US20070225748A1 (en) * | 2004-12-30 | 2007-09-27 | Park Jin S | Distal protection filter with improved wall apposition |
| JP6170700B2 (en) * | 2013-03-28 | 2017-07-26 | 寛治 井上 | Medical device |
| CN105963048A (en) * | 2016-06-15 | 2016-09-28 | 江门市众新思创医疗科技有限公司 | Degradable vena caval filter |
| CN212234794U (en) * | 2020-08-11 | 2020-12-29 | 石家庄帝中医疗器械科技有限公司 | Brain protection device and aortic valve replacement surgical instrument |
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- 2022-12-12 CN CN202211587626.8A patent/CN115634074B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102743241A (en) * | 2012-07-27 | 2012-10-24 | 首都医科大学宣武医院 | Novel deformable non-axial-flow vene cava filter |
| WO2021230871A1 (en) * | 2020-05-14 | 2021-11-18 | Dignity Health | Systems and methods for spinal realignment |
| 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 |
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Effective date of registration: 20231212 Address after: Room 605 and 607, Building 7, No. 37 Chaoqian Road, Science and Technology Park, Changping District, Beijing, 102299 Patentee after: Lepu Xintai (Beijing) Medical Technology Co.,Ltd. Address before: No. 37, Chaoqian Road, Changping District, Beijing 102200 Patentee before: LEPU MEDICAL TECHNOLOGY (BEIJING) Co.,Ltd. |
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