CN212307964U - Blood vessel protection device - Google Patents
Blood vessel protection device Download PDFInfo
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- CN212307964U CN212307964U CN202021384524.2U CN202021384524U CN212307964U CN 212307964 U CN212307964 U CN 212307964U CN 202021384524 U CN202021384524 U CN 202021384524U CN 212307964 U CN212307964 U CN 212307964U
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- filter screen
- blocking
- blocking filter
- blood vessel
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Abstract
The utility model discloses a blood vessel protection device belongs to and intervenes medical technical field. The device comprises an outer pipe, an inner pipe, an outer pipe connecting piece, an inner pipe connecting piece and a blocking filter screen fixed at the near end of the inner pipe; the opening position of the far end of the blocking filter screen is fixed with the near end of the inner pipe, and the covering film on the blocking filter screen forms an umbrella-shaped blocking surface. During lesion treatment, the blocking filter screen is placed at the proximal end of vascular lesion, an umbrella-shaped blocking surface is formed on the blocking filter screen to block upstream blood flow, and the risk of thrombus or plaque falling caused by blood flow impact is reduced; the umbrella-shaped blocking surface of the blocking filter screen is provided with a mesh structure which can block thrombus or plaque floating upstream during lesion treatment; the two ends of the inner cavity of the blocking filter screen are provided with openings which can be used for therapeutic instruments such as a thrombus taking catheter to pass through so as to use the therapeutic instruments to treat the blood vessel at the remote lesion; the middle parts of the two ends of the blocking filter screen are provided with the openings, so that the therapeutic apparatus can be always kept at the center of the blood vessel, and the damage of the therapeutic apparatus to the blood vessel is reduced.
Description
Technical Field
The utility model relates to a blood vessel protection device belongs to and intervenes medical technical field.
Background
In the process of vascular interventional therapy, thrombus or plaque at a lesion can fall off, and a downstream blood vessel can be embolized under the impact of blood flow, so that the far-end blood flow and tissue irrigation are influenced. The medical near end and the medical far end are based on the human body trunk, the near end is the end near the trunk, and the opposite end far from the trunk is the far end. At present, most of blood vessel protection devices adopt an umbrella-shaped filter to be placed at the far end of a lesion for collecting thrombus or plaque falling off from the lesion and preventing far-end embolism. Such filters must first traverse the lesion to reach the distal end when used, and are affected by the diameter of the filter itself, which can also cause thrombus or plaque to fall off when traversing the lesion, resulting in distal vessel embolization. At the same time, if the dislodged thrombus or plaque is more than the maximum filter loading, the filter recovery at the end of treatment will experience thrombus or plaque extravasation, resulting in distal vessel embolization.
Therefore, a blood vessel protecting device is designed, which can reduce the risk of thrombus or plaque falling caused by blood flow impact and reduce the damage of a treatment instrument to the blood vessel.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: a blood vessel protection device is provided, which solves the problem that the prior filter has to cross a lesion to reach the distal end before use, is influenced by the diameter of the filter, and can also cause thrombus or plaque shedding when crossing the lesion, thereby causing the embolism of the distal blood vessel.
The utility model discloses the technical problem that will solve takes following technical scheme to realize:
a blood vessel protection device comprises an outer tube, an inner tube, an outer tube connecting piece and an inner tube connecting piece, wherein the inner tube is arranged inside the outer tube;
the blocking filter screen is a spindle-shaped filter screen made of memory alloy, and openings are respectively formed in the middle parts of the near end and the far end of the blocking filter screen;
the opening position of the far end of the blocking filter screen is fixed with the near end of the inner pipe, and the covering film on the blocking filter screen forms an umbrella-shaped blocking surface.
As a preferred example, the umbrella-shaped blocking section is uniformly provided with meshes.
As a preferred example, the umbrella-shaped blocking surface is an ePTFE membrane or a TPU membrane.
As a preferable example, the blocking filter screen is a spindle-shaped filter screen with a hollow surface, which is formed by laser engraving or weaving of memory alloy.
As a preferred example, the proximal and distal openings of the blocking screen are located on the same axis.
The utility model has the advantages that:
(1) during lesion treatment, the blocking filter screen is placed at the proximal end of vascular lesion, an umbrella-shaped blocking surface is formed on the blocking filter screen to block upstream blood flow, and the risk of thrombus or plaque falling caused by blood flow impact is reduced;
(2) the umbrella-shaped blocking surface of the blocking filter screen is provided with a mesh structure, so that thrombus or plaque floating at the upstream can be blocked in the process of treating pathological changes, and a small amount of blood is allowed to flow, so that the influence of blocking on the body is reduced, and the small amount of blood flow cannot form large impact on the thrombus or plaque at the downstream;
(3) the two ends of the inner cavity of the blocking filter screen are provided with openings for the thrombus taking catheter and other therapeutic instruments to pass through so as to use the therapeutic instruments to treat the blood vessel at the remote lesion part, and the thrombus taking catheter passes through the openings to suck the intercepted thrombus or plaque and then clear the thrombus or plaque outside the body;
(4) the middle parts of the two ends of the blocking filter screen are provided with the openings, so that the therapeutic apparatus can be always kept at the center of the blood vessel, and the damage of the therapeutic apparatus to the blood vessel is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a barrier screen structure formed of a chevron-shaped structure;
FIG. 3 is a schematic diagram of a blocking screen structure surrounded by strip-shaped bending structures;
FIG. 4 is a schematic structural view of the umbrella-shaped blocking section provided at the distal end of the blocking screen according to the present invention;
FIG. 5 is a schematic side view of a chevron-shaped blocker screen with mesh openings;
FIG. 6 is a schematic view of an end face structure of a chevron-shaped blocker screen with mesh openings;
FIG. 7 is a schematic side view of a strip-shaped bent blocking filter screen with meshes;
FIG. 8 is a schematic structural view in operation of example 1;
FIG. 9 is a schematic view showing the construction of example 2 in operation;
FIG. 10 is a schematic view showing the thrombus removal catheter of example 2 retracted into the occlusion screen.
In the figure: the thrombus removal device comprises an outer tube 1, an inner tube 2, an outer tube connecting piece 3, an inner tube connecting piece 4, a blocking filter screen 5, an opening 51, an umbrella-shaped blocking surface 52, meshes 53, a blood vessel 6, a guide wire 7 and a thrombus removal catheter 8.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.
The proximal end referred to herein corresponds to the left in the drawing, and the distal end corresponds to the right in the drawing.
As shown in fig. 1-10, a blood vessel protecting device comprises an outer tube 1, an inner tube 2, an outer tube connecting piece 3, an inner tube connecting piece 4, wherein the inner tube 2 is arranged inside the outer tube 1, the distal end of the outer tube 1 is hermetically connected with the outer tube connecting piece 3, the distal end of the inner tube 2 extends out of the outer tube 1, the distal end of the inner tube 2 is hermetically connected with the inner tube connecting piece 4, and the blood vessel protecting device also comprises a blocking filter screen 5 fixed at the proximal end of the inner tube;
as shown in fig. 2 and 3, the blocking screen 5 is a spindle-shaped screen made of memory alloy, and the blocking screen 5 has openings 51 at the middle of the proximal end and the distal end, respectively.
The blocking filter screen 5 is a spindle-shaped filter screen with a hollow surface and formed by laser engraving or weaving of memory alloy. The blocking filter screen 5 can also be formed by welding memory alloy wires. Wherein, fig. 2 is a blocking screen structure composed of a herringbone structure common in the screen field; fig. 3 is a blocking filter screen structure formed by enclosing strip-shaped bending structures commonly used in the field of filter screens.
The opening 51 at the far end of the blocking screen 5 is fixed with the near end of the inner pipe 2, and an umbrella-shaped blocking section 52 is formed on the blocking screen 5.
As shown in fig. 4, the distal end of the blocking screen 5 is covered with a film to form an umbrella-shaped blocking section 52; as shown in fig. 1, the proximal end of the occluding screen 5 is coated with a membrane forming an umbrella-shaped occluding section 52; both can play a role in blocking.
The proximal and distal openings 51 of the blocker screen 5 are located on the same axis.
As shown in fig. 5-7, the umbrella-shaped blocking section 52 is uniformly provided with meshes 53.
The umbrella-shaped blocking section 52 is an ePTFE membrane or a TPU membrane.
Example 1
The outer pipe 1, the inner pipe 2, the outer pipe connecting piece 3 and the inner pipe connecting piece 4 are manufactured through processing technologies such as extrusion molding and injection molding. The blocking filter screen 5 is manufactured by carving a nickel-titanium alloy tube by laser, an ePTFE membrane is hot-melted on a metal framework of the blocking filter screen 5 to manufacture an umbrella-shaped blocking surface 52 of a coated membrane, the umbrella-shaped blocking surface 52 has no meshes 53, the position of a far-end open hole 51 of the blocking filter screen 5 is fixedly bonded at the near end of the inner tube 2 by glue, the inner tube connecting piece 4 is fixedly bonded at the far end of the inner tube 2, and the outer tube connecting piece 3 is fixedly bonded at the far end.
Before the plaque removing operation treatment, the outer tube connecting piece 3 is pushed forwards, so that the blocking filter screen 5 is completely contracted in the outer tube 1 and the air in the tube is discharged.
As shown in fig. 8, during the operation (the arrow in the figure indicates the direction of blood flow), the blood vessel 6 is punctured and a guide wire 7 (otherwise purchased) is introduced to completely traverse the blood vessel 6 at the lesion (plaque) site. The blocking filter screen 5 is conveyed to a position 1-2cm away from the far end of the pathological change under the guidance of the guide wire 7, the inner pipe connecting piece 4 is fixed, the outer pipe connecting piece 3 is withdrawn, the blocking filter screen 5 is spread in the blood vessel 6, and the umbrella-shaped blocking surface 52 temporarily blocks the blood flow. An embolectomy catheter 8 (purchased separately) is advanced over the guidewire 7 to the site of the plaque, and the plaque removal procedure is initiated. Under the action of the umbrella-shaped blocking surface 52, blood at the plaque is temporarily blocked, and plaque fragments in the process of removal are not flushed to the proximal end but are sucked by the embolectomy catheter 8, so that the plaque is removed more completely.
After the operation is finished, all the devices are taken out of the human body together.
Example 2
The outer pipe 1, the inner pipe 2, the outer pipe connecting piece 3 and the inner pipe connecting piece 4 are manufactured through processing technologies such as extrusion molding and injection molding.
The blocking filter screen 5 is manufactured by weaving nickel-titanium alloy wires, TPU is cladded on a metal framework of the blocking filter screen 5 to manufacture a film-coated umbrella-shaped blocking section 52, meshes 53 on the umbrella-shaped blocking section 52 are manufactured by laser engraving, a hole 51 at the far end of the blocking filter screen 5 is adhered and fixed at the near end of the inner tube 2 by glue, the inner tube connecting piece 4 is adhered and fixed at the far end of the inner tube 2, and the outer tube connecting piece 3 is adhered and fixed at the far end of the outer tube 1.
Before thrombus operation treatment, the outer tube connecting piece 3 is pushed forward, so that the blocking filter screen 5 is completely contracted in the outer tube 1 and the air in the tube is discharged.
As shown in fig. 9 and 10, during the operation (the arrow in the figure indicates the direction of blood flow), the blood vessel 6 is punctured, and a guide wire 7 (otherwise purchased) is introduced to completely traverse the blood vessel 6 at the lesion (thrombus) site. The blocking filter screen 5 is conveyed to a position 1-2cm away from the far end of the lesion under the guidance of the guide wire 7, the inner pipe connecting piece 4 is fixed, the outer pipe connecting piece 3 is withdrawn, the blocking filter screen 5 is expanded in the blood vessel 6, and the umbrella-shaped blocking surface 52 filters blood by means of the meshes 53. The thrombectomy catheter 8 (otherwise available) is advanced along the guidewire 12 to the thrombus 13 to begin the thrombectomy procedure. The thrombus which is easy to generate upstream continuously drifts to a treatment area in the thrombus treatment process, and the drifted thrombus is collected in the blocking filter screen 5 under the combined action of the umbrella-shaped blocking surface 52 and the mesh 53. As shown in fig. 10, after the thrombus at the proximal end is taken out by the thrombus taking catheter 8, the thrombus is withdrawn into the occlusion filter screen 5, and the thrombus collected in the occlusion filter screen 5 is continuously cleaned.
After the thrombus is sucked, all the devices are removed from the human body together.
The working principle is as follows:
during lesion treatment, the blocking filter screen 5 is placed at the proximal end of a lesion of the blood vessel 6, an umbrella-shaped blocking section 52 is formed on the blocking filter screen 5 to temporarily block upstream blood flow, and the risk of thrombus or plaque falling caused by blood flow impact is reduced;
the umbrella-shaped blocking surface 52 of the blocking filter screen 5 is provided with a mesh 53 structure, so that thrombus or plaque floating at the upstream can be blocked in the process of treating pathological changes, and a small amount of blood is allowed to flow, so that the influence of blocking on the body is reduced, and the small amount of blood flow cannot have great impact on the thrombus or plaque at the downstream;
the two ends of the inner cavity of the blocking filter screen 5 are provided with openings 51, the openings 51 can be passed by therapeutic instruments such as a thrombus taking catheter and the like so as to use the therapeutic instruments to treat the blood vessel 6 at the remote lesion part, and the thrombus or plaque intercepted by the thrombus taking catheter passes through the openings 51 and is removed to the outside of the body;
the middle parts of the two ends of the blocking filter screen 5 are provided with the openings 51, so that the therapeutic apparatus can be always kept at the center of the blood vessel, and the damage of the therapeutic apparatus to the blood vessel 6 is reduced.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A blood vessel protection device comprises an outer tube, an inner tube, an outer tube connecting piece and an inner tube connecting piece, wherein the inner tube is arranged inside the outer tube;
the blocking filter screen is a spindle-shaped filter screen made of memory alloy, and openings are respectively formed in the middle parts of the near end and the far end of the blocking filter screen;
the opening position of the far end of the blocking filter screen is fixed with the near end of the inner pipe, and the covering film on the blocking filter screen forms an umbrella-shaped blocking surface.
2. A vascular protection device as in claim 1, wherein the umbrella-shaped blocking section is uniformly provided with mesh.
3. A vascular protection device as in claim 1 or 2, wherein the umbrella-shaped blocking section is an ePTFE membrane or a TPU membrane.
4. The blood vessel protecting device of claim 1, wherein the blocking screen is a spindle-shaped screen with a hollow surface formed by laser engraving or weaving a memory alloy.
5. A vascular protection device as in claim 1, wherein the proximal and distal openings of the occlusion screen are located on the same axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021384524.2U CN212307964U (en) | 2020-07-14 | 2020-07-14 | Blood vessel protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021384524.2U CN212307964U (en) | 2020-07-14 | 2020-07-14 | Blood vessel protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212307964U true CN212307964U (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021384524.2U Active CN212307964U (en) | 2020-07-14 | 2020-07-14 | Blood vessel protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212307964U (en) |
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2020
- 2020-07-14 CN CN202021384524.2U patent/CN212307964U/en active Active
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