CN115645110B - Vascular filter and processing method thereof - Google Patents
Vascular filter and processing method thereof Download PDFInfo
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- CN115645110B CN115645110B CN202211587622.XA CN202211587622A CN115645110B CN 115645110 B CN115645110 B CN 115645110B CN 202211587622 A CN202211587622 A CN 202211587622A CN 115645110 B CN115645110 B CN 115645110B
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Abstract
A vascular filter and a processing method thereof, the vascular filter 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; a degradation ring having an annular structure; one end of the elastic support arm, which faces the degradation ring, is provided with a lantern ring, and the lantern ring is sleeved on the degradation ring; the vascular filter has an open state and a folded state, and the lantern ring slides relatively on the degradation ring during the process of the vascular filter converting from the open state to the folded state. Through above-mentioned structure can solve effectively that the vascular filter production and processing degree of difficulty among the prior art is big and deformability is not enough, leads to the problem that current vascular filter is difficult to carry.
Description
Technical Field
The invention relates to the technical field of vascular filters, in particular to a vascular filter and a processing method thereof.
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. Vascular filters temporarily prevent pulmonary embolism by trapping or inhibiting emboli within body vessels. Meanwhile, the vascular filter also has self-conversion performance, and the degradation ring of the vascular filter is required to be degraded, so that the elastic filtering arm is opened to release emboli in the body vessel.
The existing vascular filter generally fixes the elastic filtering arm and the degrading ring together by welding. For example, publication numbers are: US9,763,765B2 discloses a vascular filter. In the vascular filter, a plurality of elastic filtering arms are welded and fixed on the degradation ring to form the filtering net, so that the production and processing work of the vascular filter is realized. However, in the prior art, the elastic filtering arm is fixed on the degradation ring by welding or knotting, which not only increases the processing difficulty and processing cost of the vascular filter. Furthermore, there is a problem that relative movement between the elastic filter arms and the degradation ring cannot be achieved. And then lead to vascular filter be at needs extrusion deformation, during vascular filter's transport work, the unable fine setting that realizes in the position between the elastic filtering arm and the degradation ring to lead to vascular filter deformability not enough, lead to the problem that current vascular filter is difficult to carry.
Disclosure of Invention
The invention aims to provide a vascular filter and a processing method thereof, and aims to solve the problem that the existing vascular filter is difficult to convey due to high production and processing difficulty and insufficient deformation capacity of the vascular filter in the prior art. To this end, the present invention provides a vascular filter 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;
a degradation ring having an annular structure; one end of the elastic support arm, which faces the degradation ring, is provided with a lantern ring, and the lantern ring is sleeved on the degradation ring; the vascular filter has an open state and a folded state, and the lantern ring slides relatively on the degradation ring during the process of the vascular filter converting from the open state to the folded state.
Optionally, the filter arm further comprises: the elastic connecting support arm is used for connecting the degradation ring end to end;
one end of the elastic connecting support arm facing the degradation ring is provided with two lantern rings; the two lantern rings are respectively sleeved at two ends of the degradation ring, and the end part of the degradation ring is also provided with a limiting bulge used for blocking the end part of the degradation ring to be separated from the lantern ring.
Optionally, the two lantern rings are arranged in the length direction of the elastic connecting support arm, and the outer annular walls of the two lantern rings are jointed and connected.
Optionally, the two lantern rings on the elastic connecting support arm are arranged in a T-shaped structure in parallel along the horizontal direction; or the two lantern rings on the elastic connecting support arm are arranged along a vertical string structure.
Optionally, the elastic arm includes: the filter comprises an elastic connecting rod and two forked filter arms which are matched and connected with the elastic connecting rod;
one end of the elastic connecting rod is provided with two lantern rings, and the other end of the elastic connecting rod is connected with the two forked filter arms; the two forked filter arms are respectively matched and connected with the two adjacent elastic outer supporting arms.
Optionally, the plasticity of the forked filter arm is higher than that of the elastic connecting rod.
Optionally, in the open state of the vascular filter, an included angle between the degradation ring and a 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: 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, the degradation ring further has a degradation open 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 processing method comprises the following steps:
s1, respectively producing and processing a filtering arm and a degradation ring;
s2, sequentially sleeving a plurality of elastic support arms on the degradation ring;
s3, connecting the two ends of the degradation ring end to end through an elastic connecting support arm, so that the degradation ring is in a ring structure;
and S4, processing limiting bulges at two ends of the degradation ring to block the elastic support arm and the elastic connection support arm from being separated from the degradation ring.
Optionally, in step S1, the filtering arm is an integrally formed structure formed by processing a nickel titanium tube by laser cutting, and the integrally formed structure is further subjected to heat treatment for shaping, so that the filtering performance of the integrally formed structure is better.
The technical scheme of the invention has the following advantages:
1. the invention provides a vascular filter, 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; a degrading ring, the degrading ring being an annular structure; a lantern ring is arranged at one end of the elastic support arm, which faces the degradation ring, and the lantern ring is sleeved on the degradation ring; the vascular filter has an opening state and a folding state, and in the process of the vascular filter converting from the opening state to the folding state, the lantern ring slides relatively on the degradation ring, so that the degradation ring can obtain a larger inclination angle, and the degradation ring is changed from a circle to an ellipse when being opened to the folding state, so that the degradation ring can be folded to a smaller outer diameter.
In the invention, the elastic support arm is connected with the degradation ring of the vascular filter in a sliding sleeve way through the lantern ring. The connection mode can effectively solve the problem of high processing difficulty caused by welding fixation in the prior art. More importantly, the elastic arm can slide on the degradation ring for a small distance through the lantern ring, so that the elastic arm can generate small displacement relative to the degradation ring in the process of converting the vascular filter from the opening state to the folding state. Above-mentioned setting can let the elastic support arm rotate certain angle along lantern ring circumferential direction on degrading the ring effectively, and above-mentioned setting can provide bigger deformation volume for vascular filter to prevent that stress concentration fracture's problem from appearing in the hookup location of elastic support arm and degradation ring. In addition, the arrangement can also enable the elastic support arms to move for a certain distance along the extension direction of the degradation ring, so that the problem of mutual position interference of the adjacent elastic support arms in the compression deformation process is effectively reduced.
2. The invention provides a blood vessel filter, the filter arm further comprises: the elastic connecting support arm is used for connecting the degradation ring end to end; one end of the elastic connecting support arm facing the degradation ring is provided with two lantern rings; the two lantern rings are respectively sleeved at two ends of the degradation ring, and the end part of the degradation ring is also provided with a limiting bulge used for blocking the end part of the degradation ring to be separated from the lantern ring.
In the invention, the filtering arm is provided with the elastic connecting support arm, and one end of the elastic connecting support arm facing the degrading ring is provided with two lantern rings. The two lantern rings are respectively connected with the two ends of the degradation ring, and the lantern rings are limited to be separated from the degradation ring through the limiting bulges at the end parts of the degradation ring. The arrangement mode can simply and firmly connect the two ends of the degradation ring together, thereby reducing the processing difficulty of the vascular filter. But also can allow the elastic connecting support arm to move a certain position relative to the degradation ring.
3. According to the vascular filter provided by the invention, the two lantern rings are arranged in the length direction of the elastic connecting support arm, and the outer annular walls of the two lantern rings are connected in a fitting manner. Two of the elastic connection support arms are tightly attached and connected, so that the end parts of the degradation ring can be close to each other as much as possible, and the structural reliability of the degradation ring is ensured.
4. The lantern ring is a strip-shaped hole. 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 invention provides a blood vessel filter, wherein the elastic support arm comprises: the filter comprises an elastic connecting rod and two forked filter arms which are matched and connected with the elastic connecting rod; one end of the elastic connecting rod is provided with two lantern rings, and the other end of the elastic connecting rod is connected with the two forked filter arms; the two forked filter arms are respectively matched and connected with the two adjacent elastic outer supporting arms.
In the invention, the elastic support arm consisting of the elastic connecting rod and the two forked filter arms has the advantage of more stable filter state of the filter screen due to the stable structure similar to a triangle. Moreover, the filter screen formed by the plurality of groups of two branched filter arms can effectively improve the filtering effect.
6. According to the vascular filter provided by the invention, the plasticity of the branched filter arms is higher than that of the elastic connecting rod. In order to improve the plasticity of the forked filter arm, the forked filter arm and the elastic connecting rod which are made of the same material are arranged, and the diameter of the forked filter arm is smaller than that of the elastic connecting rod.
In the invention, the design can ensure that the bifurcated filter arms generate larger deformation amount firstly in the process of converting the vascular filter from the opening state to the folding state, so that the vascular filter is extruded and deformed in a preset installation form and converted into the folding state.
7. According to the vascular filter provided by the invention, in the open state of the vascular filter, the 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.
8. The invention provides a vascular filter, 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, namely the bottom end of the elastic support arm, has no problem of different lengths when the vascular filter is in an open state, thereby ensuring that the structural form of the vascular filter is not changed and ensuring the stability of the vascular filter in the filtering process. In addition, the design can also ensure the filtering effect of the vascular filter, and is convenient for installation and transportation of the self-conversion control module.
9. The vascular filter provided by the invention is characterized in that the degradation ring also has a degradation open 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.
The vascular filter provided by the invention has controllable self-conversion time, the self-conversion time is generally controlled to be between 1 month and several months, and the optimal selection conversion time is more than 2 months.
10. The invention provides a vascular filter processing method, which comprises the following steps: s1, respectively producing and processing a filtering arm and a degradation ring; s2, sequentially sleeving a plurality of elastic support arms on the degradation ring; s3, connecting the two ends of the degradation ring end to end through an elastic connecting support arm, so that the degradation ring is in a ring structure; and S4, processing limiting bulges at two ends of the degradation ring to block the elastic support arm and the elastic connection support arm from being separated from the degradation ring.
The vascular filter processing method provided by the invention is applied to the vascular filter provided by the invention, so that the vascular filter has the advantages of low production and processing difficulty, convenience in transportation, stable and reliable structure and good filtering effect.
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 description of the embodiments or the prior art 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 structural view of a vascular filter of a filter net according to the present invention;
FIG. 2 is an enlarged view of the elastic arm according to the present invention;
FIG. 3 is a schematic view of a connection structure of a degradation ring and a resilient arm according to the present invention;
FIG. 4 is a schematic view of the connection structure of the elastic connection arm and the degradation ring of the string-shaped collar of the present invention;
FIG. 5 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. 6 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. 7 is a schematic view of the connection between the degradation ring and the elastic support arm with the strip-shaped hole according to the present invention;
FIG. 8 is a schematic view of the connection structure of the elastic connection arm and the degradation ring of the T-shaped collar of the present invention;
description of the reference numerals:
1-a filter arm; 2-elastic external bracing arm; 3-an elastic support arm; 4-degradation of the ring; 5-a collar; 6-elastic connection of the support arm; 7-an elastic connecting rod; 8-bifurcated filter arms; 9-proximal position; 10-distal position.
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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A vascular filter is described, as shown in fig. 1, comprising:
the filtering arm 1 is an elastic structure for filtering thrombus; the filter arm 1 shown in fig. 2 comprises: the filter comprises an elastic outer support arm 2 arranged along the length direction of the filter arm 1, a filter screen consisting of a plurality of elastic support arms 3 and an elastic connecting support arm 6 used for connecting the degradation ring 4 end to end; the forked filter arms 8 and the elastic connecting rods 7 which are made of the same material are set to be the same as each other, the diameter of each forked filter arm 8 is smaller than that of each elastic connecting rod 7, and therefore the plasticity of each forked filter arm 8 is higher than that of each elastic connecting rod 7;
a degradation ring 4, wherein the degradation ring 4 is of an annular structure; a lantern ring 5 is arranged at one end of the elastic support arm 3 facing the degradation ring 4, and the lantern ring 5 is sleeved on the degradation ring 4; the vascular filter has an open state and a folded state, as shown in fig. 5, the collar 5 slides relatively on the degrading ring 4 during the transition of the vascular filter from the open state to the folded state. In addition, as shown in fig. 6, 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 blood vessel wall, so that the blood vessel filter loses the filtering function. Moreover, the lantern ring 5 is a strip-shaped hole, so that the degradation ring 4 can slide in the strip-shaped hole more smoothly.
In this embodiment, as shown in fig. 4, two of the lantern rings 5 are arranged at one end of the elastic connecting arm 6 facing the degradation ring 4; the two lantern rings 5 on the elastic connecting support arm 6 are arranged in a string-shaped structure along the vertical direction. The two lantern rings 5 are respectively sleeved at two ends of the degradation ring 4, and the end part of the degradation ring 4 is also provided with a limiting bulge for blocking the end part of the degradation ring 4 to be separated from the lantern ring 5. The two lantern rings 5 are arranged in the length direction of the elastic connecting support arm 6, and the outer annular walls of the two lantern rings 5 are jointed and connected.
In this embodiment, the resilient arm 3 shown in fig. 3 comprises: the filter comprises an elastic connecting rod 7 and two forked filter arms 8 which are matched and connected with the elastic connecting rod 7; one end of the elastic connecting rod 7 is provided with two lantern rings 5, and the other end of the elastic connecting rod 7 is connected with two forked filter arms 8; the two forked filter arms 8 are respectively matched and connected with the two adjacent elastic outer supporting arms 2. The elastic support arm 3 composed of the elastic connecting rod 7 and the two forked filter arms 8 has the advantage of more stable filter state of the filter screen similar to a triangular stable structure. Moreover, the filter screen enclosed by the plurality of groups of two branched filter arms 8 can effectively improve the filtering effect.
In this embodiment, the problem that the vascular filter cannot be reduced to a smaller size due to the position of the degradation ring 4 restricting the plurality of elastic arms 3 connected to the degradation ring 4 when the vascular filter is in the folded state can be avoided. In this embodiment, as shown in fig. 3, in the open state of the vascular filter, the angle between the degrading ring 4 and the cross section of the vascular filter is an acute angle. In addition, the degrading ring 4 has a proximal position 9 close to the end position of the vascular filter and a distal position 10 remote from the vascular filter; the filter screen includes: a plurality of resilient arms 3 of different lengths, the length of resilient arm 3 adjacent proximal location 9 being less than the length of resilient arm 3 adjacent distal location 10. As shown in fig. 5, the above-mentioned degrading ring 4 tends to be horizontally arranged along the transporting direction of the vascular filter in the process of the vascular filter being converted from the unfolded state to the folded state.
The vascular filter processing method comprises the following steps:
s1, respectively producing and processing a filtering arm 1 and a degradation ring 4; the filter arm 1 is an integrally formed structure processed and formed by a laser cutting process; then, shaping the filter into a structure of figure 6 through heat treatment and shaping;
s2, sequentially sleeving a plurality of elastic support arms 3 on the degradation ring 4;
s3, connecting the two ends of the degradation ring 4 end to end through an elastic connecting support arm 6 to enable the degradation ring 4 to form an annular structure;
and S4, processing limiting bulges at two ends of the degradation ring 4 to block the elastic support arm 3 and the elastic connection support arm 6 from being separated from the degradation ring 4.
Of course, in the present embodiment, the structure of the filter arm 1 is not particularly limited, and in other embodiments, the filter arm 1 includes only: 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 rings 4 are connected end to end in a clamping and welding mode.
Of course, in this embodiment, the arrangement position of the collars 5 on the elastic connecting arm 6 is not particularly limited, and in other embodiments, two collars 5 are respectively arranged on two sides of the elastic connecting arm 6 in the length direction, or the two collars 5 are arranged in a staggered manner, so that the degrading rings 4 can be connected together end to end.
Of course, in this embodiment, the deformability of the bifurcated filter arms 8 and the elastic connecting rod 7 is not particularly limited, and in other embodiments, the diameter dimensions of the bifurcated filter arms 8 and the elastic connecting rod 7 may also be the same.
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.
Of course, in this embodiment, the arrangement of the two collars 5 on the elastic connecting arm 6 is not particularly limited, and in other embodiments, as shown in fig. 8, the two collars 5 on the elastic connecting arm 6 are arranged in a T-shaped structure which is arranged side by side in the horizontal direction.
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. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (9)
1. A vascular filter, 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);
a degrading ring (4), the degrading ring (4) being of an annular structure; one end of the elastic support arm (3) facing the degradation ring (4) is provided with a lantern ring (5), and the lantern ring (5) is sleeved on the degradation ring (4); the vascular filter has an open state and a folded state, and the lantern ring (5) slides relatively on the degrading ring (4) during the process of the vascular filter converting from the open state to the folded state;
the filter arm (1) further comprises: the elastic connecting support arm (6) is used for connecting the degrading rings (4) end to end; one end of the elastic connecting support arm (6) facing the degrading ring (4) is provided with two lantern rings (5); the two lantern rings (5) are respectively sleeved at two ends of the degradation ring (4), and a limiting bulge for preventing the end part of the degradation ring (4) from being separated from the lantern rings (5) is further arranged at the end part of the degradation ring (4);
the two lantern rings (5) on the elastic connecting support arm (6) are arranged in a T-shaped structure in parallel along the horizontal direction; or the two lantern rings (5) on the elastic connecting support arm (6) are arranged in a string-shaped structure along the vertical direction;
when the vascular filter is in the open state, the included angle between the degradation ring (4) and the cross section of the vascular filter is an acute angle.
2. A vascular filter as claimed in claim 1, characterised in that the two collars (5) are arranged in the length direction of the resilient connecting arms (6) and the outer circumferential walls of the two collars (5) are in abutting connection.
3. A vascular filter as claimed in claim 1, characterised in that the collar (5) is a strip-shaped hole.
4. A vascular filter as claimed in claim 1 or 2, characterised in that the resilient arms (3) comprise: the filter comprises an elastic connecting rod (7) and two forked filter arms (8) which are matched and connected with the elastic connecting rod (7);
one end of the elastic connecting rod (7) is provided with two lantern rings (5), and the other end of the elastic connecting rod (7) is connected with the two forked filter arms (8); the two forked filter arms (8) are respectively matched and connected with the two adjacent elastic outer supporting arms (2).
5. A vascular filter as claimed in claim 4, characterised in that the plasticity of the diverging filter arms (8) is higher than the plasticity of the elastic connecting rods (7).
6. The vascular filter of claim 1,
the degrading ring (4) having a proximal position (9) close to the end position of the vascular filter and a distal position (10) distant 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 (9) being less than the length of the elastic support arm (3) near the distal end position (10).
7. A vascular filter as claimed in claim 1, characterised in that the degrading ring (4) also has a degrading 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.
8. A method for manufacturing a vascular filter according to claim 1, comprising the steps of:
s1, respectively producing and processing a filtering arm (1) and a degradation ring (4);
s2, sequentially sleeving a plurality of elastic support arms (3) on the degradation ring (4);
s3, two lantern rings (5) are arranged at one end of each elastic connecting support arm (6) facing the degradation ring (4) to connect the two ends of the degradation ring (4) end to end, so that the degradation ring (4) forms an annular structure; the two lantern rings (5) are respectively arranged on two sides of the elastic connecting support arm (6) in the length direction, or the two lantern rings (5) are arranged in a staggered mode, so that the degrading rings (4) can be connected together end to end; the two lantern rings (5) on the elastic connecting support arm (6) are arranged in a T-shaped structure in parallel along the horizontal direction, or the two lantern rings (5) on the elastic connecting support arm (6) are arranged in a string-shaped structure along the vertical direction;
and S4, processing limiting bulges at two ends of the degradation ring (4) to prevent the elastic support arm (3) and the elastic connection support arm (6) from being separated from the degradation ring (4).
9. The method for manufacturing a vascular filter according to claim 8, wherein in step S1, the filtering arm (1) is an integrally formed structure formed by machining a nickel titanium tube through laser cutting, and the integrally formed structure is shaped through heat treatment to improve the filtering performance of the filtering arm (1).
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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 |
| CN112618105A (en) * | 2020-12-31 | 2021-04-09 | 上海翰凌医疗器械有限公司 | Valve support, have valve support and conveying mechanism's cooperation device |
| 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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