Arresting device in blood vessel cavity
By designing an adjustable intravascular lumen capture device, the problem of inability to adapt to different blood vessel thicknesses and difficulty in collecting small thrombus in the prior art is solved, and stable capture and improved thrombectomy safety is achieved.
Patent Information
- Application Number
- CN202311805507.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-06-27
AI Technical Summary
Existing endovascular traps cannot effectively control the diameter of the thrombectomy basket, and are suitable for blood vessels of different thicknesses and are difficult to collect smaller, discrete thrombus, which may cause thrombus to escape.
A vascular lumen capture device is designed, including a capture net basket, a delivery tube and a traction structure. The capture net basket has an adjustable open and closed state, and the opening and closing of the net basket is achieved by pulling the traction structure to ensure stable capture of thrombus and avoid falling off.
This device can effectively prevent thrombosis from falling off, ensure capture performance, and move smoothly in the blood vessels, ensure blood circulation, and improve the safety of the thrombectomy process.
Smart Images
Figure CN120203698A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of medical devices, and particularly to an intravascular capture device. Background Art
[0002] Clinically, the indications for using an intravascular snare include the establishment of a track during interventional treatment, such as the capture of a guide wire during the interventional treatment of ventricular septal defect or patent ductus arteriosus; the capture of a retrograde guide wire for chronic total occlusion lesions, such as in the coronary artery or the aortic root; the removal of intravascular foreign bodies, such as thrombus, broken guide wires, and dislodged stents, etc.; the removal of intracardiac foreign bodies, such as dislodged occluding devices, etc.
[0003] Currently, the common ones on the market can only perform thrombectomy on blood vessels at specified positions, unable to control the diameter of the thrombectomy basket, not applicable to blood vessels of different thicknesses. At the same time, when collecting thrombus, it is unable to collect small and discrete thrombus well, and there may be a situation where small thrombus clots escape to other positions in the blood vessel.
[0004] Based on the shortcomings of the existing technology, there is an urgent need to research an intravascular capture device to solve the above problems. Summary of the Invention
[0005] To solve the above technical problems, the present invention provides an intravascular capture device, which can avoid the shedding of thrombus and ensure its capture performance; at the same time, the capture device can move smoothly in the blood vessel, and the blood in the blood vessel can flow through the holes of the capture basket and the gap between the capture basket and the blood vessel, thus avoiding the blockage of blood during thrombectomy and improving the use safety of the capture device.
[0006] The present invention provides an intravascular capture device, including a capture basket, a delivery tube, and a traction structure:
[0007] The capture basket is a net-like structure with a cavity inside. The capture basket includes a first polymerization end and a second polymerization end arranged opposite to each other. The first polymerization end is fixedly connected to one end of the delivery tube;
[0008] The first end of the traction structure passes through the delivery tube and extends into the capture basket, and is fixedly connected to the second polymerization end;
[0009] Under the action of an external force, the first end of the traction structure can reciprocally move relative to the delivery tube along the circumferential direction of the delivery tube to drive the second polymerization end to move to form a closed state or an open state.
[0010] Further, in the state where the second polymerization end forms the open state, the second polymerization end is dispersed to form an open end, and the cross-sectional area of the open end is larger than the cross-sectional area of the second polymerization end.
[0011] Further, in the direction from the first aggregation end to the second aggregation end, a plurality of connection holes are spacedly arranged on the capture basket;
[0012] The first end of the traction structure passes through the plurality of connection holes, and the traction structure can slide relative to the connection holes.
[0013] Further, the capture basket includes a plurality of capture wires, and the plurality of capture wires are wound to form the net structure;
[0014] The connection holes are arranged at the connection positions of at least two of the capture wires.
[0015] Further, the cross-section of the capture wire is square, and the width of the capture wire is 0.05 - 0.2 mm
[0016] Further, the width of the capture wire at the first aggregation end is 0.1 - 0.2 mm, and the width of the capture wire at the second aggregation end is 0.05 - 0.1 mm.
[0017] Further, it further includes a developing component, and the developing component is fixedly arranged at the second aggregation end.
[0018] Further, the developing component further includes a plurality of developing elements, and the developing elements are arranged on each capture wire of the capture basket.
[0019] Further, the traction structure includes a plurality of traction wires. After the first ends of the plurality of traction wires pass through the delivery tube, they are spacedly arranged along the circumference of the second aggregation end and are fixedly connected to the second aggregation end.
[0020] Further, the diameter corresponding to the cross-section of the open end of the capture basket is 3 - 9 mm.
[0021] Implementing the embodiments of the present invention has the following beneficial effects:
[0022] By pulling the traction structure, the second aggregation end can be switched from a closed state to an open state, so that the capture basket can capture thrombus in the blood vessel; after the capture basket captures the thrombus, by pulling the traction structure, the second aggregation end is switched from an open state to a closed state, thereby avoiding the shedding of the thrombus and ensuring its capture performance; at the same time, when the capture basket is switched from an open state to a closed state, the volume is reduced, so that the capture device can move smoothly in the blood vessel, and the blood in the blood vessel can flow through the holes of the capture basket and the gap between the capture basket and the blood vessel, thereby avoiding the blockage of blood during thrombus removal and improving the use safety of the capture device. Description of the Drawings
[0023] To more clearly illustrate the technical solution of the present invention, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0024] Figure 1 Structural diagram of the intravascular capture device described in this embodiment;
[0025] Figure 2 Structural diagram of the second polymerization end 32 in the closed state described in this embodiment;
[0026] Figure 3 Structural diagram of the second polymerization end 32 in the open state described in this embodiment;
[0027] Figure 4 Partial enlarged view of the capture basket described in this embodiment.
[0028] Among them, the corresponding reference numerals in the figure are:
[0029] 1 - traction wire; 2 - delivery tube; 3 - capture basket; 4 - developer; 11 - connection hole; 31 - first polymerization end; 32 - second polymerization end; 321 - connection part. Detailed implementation manners
[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.
[0032] In view of the deficiencies of the prior art, the present invention realizes that the capture basket can capture thrombus in blood vessels by pulling the traction structure to drive the second polymerization end to switch from a closed state to an open state; after the capture basket captures the thrombus, by pulling the traction structure, the second polymerization end is driven to switch from the open state to the closed state, thereby avoiding the shedding of the thrombus and ensuring its capture performance; at the same time, when the capture basket switches from the open state to the closed state, the volume is reduced, so that the capture device can move smoothly in the blood vessel, and the blood in the blood vessel can flow through the holes of the capture basket and the gap between the capture basket and the blood vessel, thereby avoiding the blockage of blood during thrombus removal and improving the use safety of the capture device.
[0033] See the appendix Figures 1-4 , this embodiment provides an intravascular capture device, including a capture basket 3, a delivery tube 2 and a traction structure 1: the capture basket 3 is a net-like structure with a cavity inside, the capture basket 3 includes a first polymerization end 31 and a second polymerization end 32 arranged oppositely, and the first polymerization end 31 is fixedly connected to one end of the delivery tube 2; the first end of the traction structure 1 passes through the delivery tube 2 and extends into the capture basket 3, and is fixedly connected to the second polymerization end 32; under the action of an external force, the first end of the traction structure 1 can reciprocate circumferentially relative to the delivery tube 2 along the circumference of the delivery tube 2 to drive the second polymerization end 32 to move to form a closed state or an open state.
[0034] It should be noted that: in this embodiment, by pulling the traction structure 1, the second polymerization end 32 can be driven to switch from the closed state to the open state, so that the capture basket 3 can capture the thrombus in the blood vessel; after the capture basket 3 captures the thrombus, by pulling the traction structure 1, the second polymerization end 32 is driven to switch from the open state to the closed state, thereby avoiding the shedding of the thrombus and ensuring its capture performance. At the same time, when the capture basket 3 switches from the open state to the closed state, the volume is reduced, so that the capture device can move smoothly in the blood vessel, and the blood in the blood vessel can flow through the holes of the capture basket 3 and the gap between the capture basket 3 and the blood vessel, thereby avoiding the blockage of blood during thrombus removal and improving the use safety of the capture device.
[0035] Specifically, when the second polymerization end 32 is in the closed state, the capture basket 3 is an oval shape with both ends closed; when the second polymerization end 32 is in the open state, the capture basket 3 is in a funnel shape.
[0036] Further, when the second polymerization end 32 is in the open state, it can capture the object to be captured in the blood vessel. After the capture is completed, the capture basket 3 is driven to switch from the open state to the closed state by controlling the traction structure 1.
[0037] Specifically, the traction structure 1 is coaxially arranged with the delivery tube 2, and along the axial direction of the delivery tube 2, the traction structure 1 is slidably matched with the delivery tube 2.
[0038] In some possible embodiments, when the second polymerization end 32 is in an open state, the second polymerization end 32 is dispersed to form an open end, and the cross-sectional area of the open end is larger than that of the second polymerization end 32, which can enable the thrombus to smoothly enter the capture basket 3 from the open end, improving the convenience of thrombus capture.
[0039] Specifically, when the second polymerization end 32 is in an open state, the diameter of the open end is much larger than that of the first polymerization end 31 to enable the second polymerization end 32 to capture the object to be captured in the blood vessel.
[0040] Specifically, when the second polymerization end 32 is in a closed state, the cross-sectional area of the second polymerization end 32 is the first cross-sectional area, and when the second polymerization end 32 is in an open state, the cross-sectional area of the second polymerization end 32 is the second cross-sectional area. The second cross-sectional area is much larger than the first cross-sectional area and smaller than the diameter of the blood vessel, so that the open end can smoothly capture the thrombus in the blood vessel.
[0041] In some possible embodiments, along the direction from the first polymerization end 31 to the second polymerization end 32, a plurality of connection holes 11 are spacedly arranged on the capture basket 3; the first end of the traction structure 1 passes through the plurality of connection holes 11, and the traction structure 1 can slide relative to the connection holes 11. By providing the connection holes 11, the traction structure 1 can drive the entire capture basket 3 to move, and through the mutual cooperation of the traction structure 1 and the plurality of connection holes 11, the capture basket 3 can present different opening degrees, that is, the capture basket 3 with different lengths, thereby expanding the use range of the capture device.
[0042] Specifically, the shape and size of the connection holes 11 are not limited as long as it is ensured that the traction structure 1 can slide relative to the connection holes 11.
[0043] Specifically, the capture basket 3 includes a plurality of capture wires, and the width of the connection holes 11 is larger than the width of the capture wires, so that the capture wires can slide relative to the connection holes 11.
[0044] Preferably, the connection holes 11 are long strip holes, and the length direction of the connection holes 11 is arranged along the direction from the first polymerization end 31 to the second polymerization end 32.
[0045] In some possible embodiments, a plurality of capture wires are wound to form a net structure; the connection holes 11 are arranged at the connection positions of at least two capture wires. Arranging the connection holes 11 at the connection positions of at least two capture wires can prevent the overall strength of the capture basket 3 from being reduced due to the arrangement of the connection holes 11 on one capture wire, thereby ensuring the overall strength of the capture basket 3.
[0046] Specifically, the length of the connection holes 11 does not exceed the length of the connection positions of the capture wires to avoid the connection holes 11 affecting the bending stiffness of the capture basket 3.
[0047] In some possible embodiments, the cross-section of the capture wire is square, and the width of the capture wire is 0.05 - 0.2 mm. Setting the width of the capture wire within the above range can ensure that the capture basket 3 has both supportiveness and a certain degree of flexibility.
[0048] Specifically, the depth of the connection hole 11 is equal to the height of the capture wire.
[0049] Specifically, the width of the capture wire can be 0.05 - 0.08 mm, 0.05 - 0.1 mm, 0.08 - 0.1 mm, 0.1 - 0.15 mm, 0.1 - 0.2 mm, 0.18 - 0.2 mm, or 0.15 - 0.2 mm, etc.
[0050] In some possible embodiments, the width of the capture wire at the first aggregation end 31 is 0.1 - 0.2 mm, and the width of the capture wire at the second aggregation end 32 is 0.05 - 0.1 mm. By making the width of the capture wire at the first aggregation end 31 greater than that at the second aggregation end 32, it can be ensured that the first aggregation end 31 of the capture basket 3 has a certain degree of supportiveness, and the second aggregation end 32 of the capture basket 3 has a certain degree of flexibility, such that the first aggregation end 31 can play a certain supporting role for the capture basket 3, and the second aggregation end 32 can be quickly opened under the drive of the traction structure 1.
[0051] Specifically, in the direction from the first aggregation end 31 to the second aggregation end 32 of the capture basket 3, the capture basket 3 includes a proximal segment, a connection segment, and a distal segment.
[0052] Specifically, the connection segment is the middle part of the capture basket 3, and the diameter corresponding to the cross-section at the connection segment is 2 - 8 mm.
[0053] Further, the width of the capture wire in the proximal segment is 0.1 - 0.2 mm, and the width of the capture wire in the distal segment is 0.05 - 0.1 mm, so that the proximal end of the capture basket 3 has supportiveness, and the distal end of the capture basket 3 has flexibility.
[0054] Specifically, the width of the capture wire in the proximal segment can be 0.1 - 0.15 mm, 0.1 - 0.2 mm, 0.18 - 0.2 mm, or 0.15 - 0.2 mm, etc.
[0055] Specifically, the width of the capture wire in the distal segment can be 0.05 - 0.08 mm, 0.05 - 0.1 mm, or 0.08 - 0.1 mm, etc.
[0056] In some other possible embodiments, in the direction from the first aggregation end 31 to the second aggregation end 32, the width of the capture wire gradually decreases.
[0057] Specifically, in the direction from the first aggregation end 31 to the second aggregation end 32, the width of the capture wire gradually changes from 0.1 - 0.2 mm to 0.05 - 0.1 mm, so that the first aggregation end 31 has a certain degree of support, and the second aggregation end 32 has a certain degree of flexibility.
[0058] In some possible embodiments, it further includes a developing component, which is fixedly arranged at the second aggregation end 32. By setting the developing component, it is possible to visually observe whether the second aggregation end 32 is in a closed state or an open state under DSA imaging, thereby improving the convenience of operating the vascular cavity capture device.
[0059] Specifically, the material of the developing component is a high-density material such as platinum tungsten or platinum iridium.
[0060] In some possible embodiments, the developing component further includes several developing elements 4, and each capture wire of the capture wire basket 3 is provided with a developing element 4. By arranging a developing element 4 on each capture wire at the second aggregation end 32, the overall shape of the second aggregation end 32 of the capture wire basket 3 can be completely displayed, enabling the operator to see the state of the second aggregation end 32 under DSA imaging, thereby improving the reliability of the vascular cavity capture device during operation.
[0061] Specifically, the developing element 4 is sleeved on the capture wire.
[0062] In some possible embodiments, the traction structure 1 includes several traction wires. After the first ends of the several traction wires pass through the delivery tube 2, they are arranged at intervals along the circumferential direction of the second aggregation end 32 and are fixedly connected to the second aggregation end 32. By setting several traction wires fixedly connected to the second aggregation end 32, it is possible to ensure that the second aggregation end 32 moves synchronously under the drive of the several traction wires, thereby ensuring the stability and reliability of the operation of the vascular cavity capture device.
[0063] Specifically, the second aggregation end 32 of the capture wire basket 3 has a plurality of connecting parts 321. At least two capture wires at the second aggregation end 32 are fixedly connected to form the connecting part 321, and the connecting parts 321 are not connected to each other. Each connecting part 321 is fixedly connected to at least one traction wire, so that the plurality of connecting parts 321 can move synchronously under the traction of the traction structure 1, realizing the stability of the switching between the closed state and the open state of the first aggregation end 31.
[0064] In some possible embodiments, the diameter corresponding to the cross-section of the open end of the capture wire basket 3 is 3 - 9 mm.
[0065] Specifically, the diameter corresponding to the cross-section of the open end of the capture wire basket 3 is 3 - 4 mm, 3 - 5 mm, 3 - 8 mm, 3 - 9 mm, 4 - 6 mm, 4 - 9 mm, 6 - 9 mm or 7 - 9 mm, etc.
[0066] Specifically, in the direction from the first aggregation end 31 to the second aggregation end 32, the diameter corresponding to the cross-section of the middle part of the capture basket 3 is 2-8 mm.
[0067] Specifically, the diameter corresponding to the cross-section of the middle part of the capture basket 3 is 2-3 mm, 2-4 mm, 2-7 mm, 2-8 mm, 3-5 mm, 3-7 mm, 4-8 mm, or 6-8 mm, etc.
[0068] Example 1
[0069] See the appendix Figures 1-4 , this embodiment provides an intravascular capture device, including a capture basket 3, a delivery tube 2, and a traction structure 1: The capture basket 3 is a net-like structure with a cavity inside. The capture basket 3 includes a first aggregation end 31 and a second aggregation end 32 arranged oppositely. The first aggregation end 31 is fixedly connected to one end of the delivery tube 2; The first end of the traction structure 1 passes through the delivery tube 2 and extends into the capture basket 3, and is fixedly connected to the second aggregation end 32; Under the action of an external force, the first end of the traction structure 1 can reciprocate circumferentially relative to the delivery tube 2 to drive the second aggregation end 32 to move to a closed state or an open state.
[0070] Specifically, when the second aggregation end 32 is in the closed state, the capture basket 3 is an ellipse with both ends closed; when the second aggregation end 32 is in the open state, the capture basket 3 is a funnel shape.
[0071] Further, when the second aggregation end 32 is in the open state, it can capture the object to be captured in the blood vessel. After the capture is completed, the capture basket 3 is driven to switch from the open state to the closed state by controlling the traction structure 1.
[0072] Specifically, when the second aggregation end 32 forms an open state, the diameter of the open end is much larger than the diameter of the first aggregation end 31 to enable the second aggregation end 32 to capture the object to be captured in the blood vessel.
[0073] Specifically, when the second aggregation end 32 forms a closed state, the cross-sectional area of the second aggregation end 32 is the first cross-sectional area. When the second aggregation end 32 forms an open state, the cross-sectional area of the second aggregation end 32 is the second cross-sectional area. The second cross-sectional area is much larger than the first cross-sectional area, and the second cross-sectional area is smaller than the diameter of the blood vessel, so that the open end can smoothly capture the thrombus in the blood vessel.
[0074] Specifically, the second converging end 32 of the capture basket 3 has a plurality of connecting portions 321. At least two capture wires are fixedly connected at the second converging end 32 to form the connecting portions 321, and the connecting portions 321 are not connected to each other. Each connecting portion 321 is fixedly connected to at least one traction wire, so that the plurality of connecting portions 321 can move synchronously under the traction of the traction structure 1, realizing the stability of the switching of the first converging end 31 between the closed state and the open state.
[0075] In this embodiment, the diameter corresponding to the cross-section of the open end of the capture basket 3 is 3-9 mm.
[0076] Specifically, the diameter corresponding to the cross-section of the open end of the capture basket 3 is 3-4 mm, 3-5 mm, 3-8 mm, 3-9 mm, 4-6 mm, 4-9 mm, 6-9 mm or 7-9 mm, etc.
[0077] Specifically, in the direction from the first converging end 31 to the second converging end 32, the diameter corresponding to the cross-section of the middle part of the capture basket 3 is 2-8 mm.
[0078] Specifically, the diameter corresponding to the cross-section of the middle part of the capture basket 3 is 2-3 mm, 2-4 mm, 2-7 mm, 2-8 mm, 3-5 mm, 3-7 mm, 4-8 mm or 6-8 mm, etc.
[0079] In this embodiment, the capture basket 3 includes a plurality of capture wires, and the plurality of capture wires are wound to form a net structure; the connection holes 11 are arranged at the connection positions of at least two capture wires.
[0080] In this embodiment, the cross-section of the capture wire is square, and the width of the capture wire is 0.05-0.2 mm. Setting the width of the capture wire within the above range can ensure that the capture basket 3 has both supportiveness and a certain degree of flexibility.
[0081] Specifically, the width of the capture wire can be 0.05-0.08 mm, 0.05-0.1 mm, 0.08-0.1 mm, 0.1-0.15 mm, 0.1-0.2 mm, 0.18-0.2 mm or 0.15-0.2 mm, etc.
[0082] In this embodiment, the width of the capture wire at the first converging end 31 is 0.1-0.2 mm, and the width of the capture wire at the second converging end 32 is 0.05-0.1 mm.
[0083] Specifically, in the direction from the first converging end 31 to the second converging end 32 of the capture basket 3, the capture basket 3 includes a proximal segment, a connecting segment and a distal segment.
[0084] Specifically, the connecting section is in the middle of the capture basket 3, and the diameter corresponding to the cross-section at the connecting section is 2-8 mm.
[0085] Further, the width of the capture wires in the proximal section is 0.1-0.2 mm, and the width of the capture wires in the distal section is 0.05-0.1 mm, so that the proximal end of the capture basket 3 has support, and the distal end of the capture basket 3 has flexibility.
[0086] Specifically, the width of the capture wires in the proximal section can be 0.1-0.15 mm, 0.1-0.2 mm, 0.18-0.2 mm, 0.15-0.2 mm, etc.
[0087] Specifically, the width of the capture wires in the distal section can be 0.05-0.08 mm, 0.05-0.1 mm, 0.08-0.1 mm, etc.
[0088] In some other possible embodiments, in the direction from the first polymerization end 31 to the second polymerization end 32, the width of the capture wires gradually decreases.
[0089] Specifically, in the direction from the first polymerization end 31 to the second polymerization end 32, the width of the capture wires gradually changes from 0.1-0.2 mm to 0.05-0.1 mm, so that the first polymerization end 31 has a certain degree of support, and the second polymerization end 32 has a certain degree of flexibility.
[0090] Specifically, the traction structure 1 is coaxially arranged with the delivery pipe 2, and along the axial direction of the delivery pipe 2, the traction structure 1 is slidably engaged with the delivery pipe 2.
[0091] In this embodiment, the traction structure 1 includes a plurality of traction wires. After the first ends of the plurality of traction wires pass through the delivery pipe 2, they are arranged at intervals along the circumference of the second polymerization end 32 and are fixedly connected to the second polymerization end 32.
[0092] In this embodiment, when the second polymerization end 32 is in an open state, the second polymerization end 32 is dispersed to form an open end, and the cross-sectional area of the open end is larger than the cross-sectional area of the second polymerization end 32.
[0093] Specifically, the length of the connection hole 11 does not exceed the length of the position where the capture wires are connected, so as to avoid the connection hole 11 affecting the bending stiffness of the capture basket 3.
[0094] Specifically, the depth of the connection hole 11 is equal to the height of the capture wires.
[0095] In this embodiment, in the direction from the first polymerization end 31 to the second polymerization end 32, a plurality of connection holes 11 are arranged at intervals on the capture basket 3; the first end of the traction structure 1 passes through the plurality of connection holes 11, and the traction structure 1 can slide relative to the connection holes 11.
[0096] Specifically, the shape and size of the connection hole 11 are not limited, as long as it is ensured that the traction structure 1 can slide relative to the connection hole 11.
[0097] Specifically, the width of the connection hole 11 is greater than the width of the capture wire, so that the capture wire can slide relative to the connection hole 11.
[0098] Preferably, the connection hole 11 is an elongated hole, and the length direction of the connection hole 11 is arranged along the direction from the first polymerization end 31 to the second polymerization end 32.
[0099] In this embodiment, a developing component is further included, and the developing component is fixedly arranged at the second polymerization end 32.
[0100] Specifically, the material of the developing component is a high-density material such as platinum tungsten or platinum iridium.
[0101] In this embodiment, the developing component further includes several developing members 4, and a developing member 4 is arranged on each capture wire of the capture wire basket 3, and a developing member 4 is arranged on each capture wire at the second polymerization end 32.
[0102] Specifically, the developing member 4 is sleeved on the capture wire.
[0103] Although the present invention has been described through preferred embodiments, the present invention is not limited to the embodiments described herein. Various changes and variations are also included without departing from the scope of the present invention.
[0104] In this article, the front, rear, upper, lower and other orientation words are defined based on the positions of the components in the drawings and the positions of the components relative to each other, only for the sake of clarity and convenience of expressing the technical solution. It should be understood that the use of the orientation words should not limit the scope of the present invention claimed.
[0105] Without conflict, the above embodiments and the features in the embodiments in this article can be combined with each other.
[0106] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.
Claims
1. An intravascular capture device, characterized in that, It includes a capture net basket (3), a delivery pipe (2) and a traction structure (1): The capture net basket (3) is a net-like structure with a cavity inside. The capture net basket (3) includes a first polymerization end (31) and a second polymerization end (32) arranged oppositely. The first polymerization end (31) is fixedly connected to one end of the delivery pipe (2); The first end of the traction structure (1) passes through the delivery pipe (2) and extends into the capture net basket (3), and is fixedly connected to the second polymerization end (32); Under the action of an external force, the first end of the traction structure (1) can reciprocate circumferentially along the delivery pipe (2) relative to the delivery pipe (2), so as to drive the second polymerization end (32) to move to a closed state or an open state.
2. The intravascular capture device according to claim 1, wherein In the case where the second polymerization end (32) forms the open state, the second polymerization end (32) disperses to form an open end, and the cross-sectional area of the open end is larger than the cross-sectional area of the second polymerization end (32).
3. The intravascular capture device according to claim 1, wherein, In the direction from the first polymerization end (31) to the second polymerization end (32), a plurality of connection holes (11) are arranged at intervals on the capture net basket (3); The first end of the traction structure (1) passes through the plurality of connection holes (11), and the traction structure (1) can slide relative to the connection holes (11).
4. The intravascular capture device according to claim 3, characterized in that, The capture net basket (3) includes a plurality of capture wires, and the plurality of capture wires are wound to form the net-like structure; The connection holes (11) are arranged at the connection positions of at least two of the capture wires.
5. The intravascular capture device according to claim 4, wherein, The cross-section of the capture wire is square, and the width of the capture wire is 0.05 - 0.2 mm.
6. The intravascular capture device according to claim 5, characterized in that, The width of the capture wire at the first polymerization end (31) is 0.1 - 0.2 mm, and the width of the capture wire at the second polymerization end (32) is 0.05 - 0.1 mm.
7. The intravascular capture device according to claim 1, wherein, It further includes a developing component, and the developing component is fixedly arranged at the second polymerization end (32).
8. The intravascular capture device according to claim 7, wherein, The developing component further includes a plurality of developing elements (4), and each capture wire of the capture net basket (3) is provided with the developing element (4).
9. The intravascular capture device according to any one of claims 1-8, characterized in that, The traction structure (1) includes a plurality of traction wires. After the first ends of the plurality of traction wires pass through the delivery pipe (2), they are arranged at intervals along the circumference of the second polymerization end (32) and are fixedly connected to the second polymerization end (32).
10. The intravascular capture device according to any one of claims 1-8, characterized in that, The diameter corresponding to the cross-section of the open end of the capture net basket (3) is 3 - 9 mm.