Thrombus capture device with expanded opening

Abstract

The thrombus capturing device comprises a thrombus protection unit and an expansion ring, the thrombus protection unit is of a conical hollow structure with the near-end opening and the far-end diameter gradually reduced, woven fan blades of a mesh enclosure structure are woven at the far end of the thrombus protection unit, and the expansion ring is of an annular structure bent multiple times in the circumferential direction; and the expansion ring is wavy, is crossly woven with the woven fan blades, and can shrink towards the inner part of the ring and expand towards the outer part of the ring, so that the opening position of the thrombus protection unit can be expanded, and thrombus can be conveniently taken out.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more particularly to a thrombus capture device with an expanding opening. Background Technology

[0002] Arterial stenosis refers to the thickening of the blood vessel wall and narrowing of the lumen caused by atherosclerosis, trauma, or other congenital factors, leading to ischemia in the organs or tissues supplied by the vessel. Balloon dilation, balloon dilatation stent placement, and stent placement are common procedures for treating vascular stenosis. During the procedure, dilation of the blood vessel can cause thrombi to detach. If the thrombus is not prevented from flowing distally with the blood flow, it can cause serious consequences such as cerebral infarction and myocardial infarction. Embolism protection devices are usually placed prophylactically distal to the lesion before balloon dilation or stent placement to capture any thrombi that detach during the procedure. However, current devices, due to insufficient opening or inadequate functionality before capturing the thrombus, may fail to adhere to the inner wall of the blood vessel, allowing the thrombus to escape. Utility Model Content

[0003] In view of this, this application proposes a thrombus capture device with an expanding opening to improve the overall expansion capability.

[0004] According to one aspect of this application, a thrombus capture device with an expanding opening is provided, comprising: a thrombus protection unit and an expanding ring;

[0005] The thrombus protection unit is a hollow structure with a proximal opening and a gradually decreasing diameter at the distal end, forming a cone shape. The distal end of the thrombus protection unit is woven with a mesh structure of woven fan-shaped blades.

[0006] The expansion ring is a ring-shaped structure that is bent multiple times along the circumferential direction and is woven into the woven fan blade. The expansion ring is wavy and is woven crosswise with the woven fan blade.

[0007] In one possible implementation, the woven fan blades are fan-shaped mesh structures.

[0008] In one possible implementation, a thrombus-catching section is also included, wherein the thrombus protection unit is a braided structure made of braided core wires, and the braided fan blades are integrally formed with the thrombus-catching section.

[0009] In one possible implementation, the expansion ring is embedded within the thrombus protection unit along the weaving direction of the thrombus protection unit.

[0010] One possible implementation method also includes: reinforcing core wire;

[0011] The diameter of the reinforcing core wire is larger than the diameter of the braided core wire of the thrombus protection unit;

[0012] The reinforcing core wire is woven into the braided fan blade along the distal end of the thrombosis protection unit.

[0013] In one possible implementation, the braiding path of the reinforcing core wire is the same as that of the braided core wire of the thrombus protection unit.

[0014] In one possible implementation, the number of reinforcing core wires woven in each of the braided fan blades is an even number.

[0015] In one possible implementation, two or more of the reinforcing core wires are arranged symmetrically relative to the braided fan blades.

[0016] In one possible implementation, one axial end of the expansion ring is a plurality of arc-shaped expansion portions, each of which matches any one of the braided fan blades and is woven into the braided fan blade, and the axis of symmetry of the expansion portion overlaps with the axis of symmetry of the braided fan blade.

[0017] In one possible implementation, the expansion ring is a developing spring, a laser-cut developing tube, or a developing material of a developing film.

[0018] The beneficial effects of the thrombus capture device with an expanding opening according to the embodiments of this application are as follows: By adding an expanding ring at the opening position of the thrombus protection unit, the thrombus protection unit is opened before capturing the thrombus, making it easier to capture and remove the thrombus. Specifically, the thrombus protection unit has a conical braided structure with braided fan blades extending at the opening position, which can cooperate with the delivery guide wire to open the opening of the thrombus protection unit and complete the delivery of the thrombus protection unit to the lesion location and removal. The expanding ring has a wavy cross-section and is a ring structure. When the expanding ring is braided to the connection position between the braided fan blades of the thrombus protection unit and the thrombus capturing section, i.e., the opening position of the thrombus protection unit, it is easy to open the opening position of the thrombus protection unit. Moreover, the expanding ring has a wavy ring structure, which can shrink towards the inside of the ring and expand towards the outside, thereby expanding the opening position of the thrombus protection unit and making it easier to cover the thrombus.

[0019] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0021] Figure 1 A partially enlarged schematic diagram of a thrombus capture device with an expanded opening according to an embodiment of this application is shown;

[0022] Figure 2This illustration shows an embodiment of a thrombus capture device with an expanded opening according to this application.

[0023] Figure 3 Another partially enlarged schematic diagram of a thrombus capture device with an expanded opening according to an embodiment of this application is shown;

[0024] Figure 4 This diagram illustrates a thrombus capture device with an expanding opening, according to an embodiment of this application, inside a blood vessel. Detailed Implementation

[0025] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0026] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0029] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0030] like Figures 1-4As shown, the thrombus capture device with an expanding opening according to an embodiment of this application includes: a thrombus protection unit 100 and an expanding ring 200. The thrombus protection unit 100 is a hollow structure with a proximal opening and a gradually decreasing diameter at the distal end, forming a cone shape. The distal end of the thrombus protection unit 100 is woven with a mesh structure of a woven fan 120. The expanding ring 200 is a ring structure that is bent multiple times in the circumferential direction and woven into the woven fan 120. The expanding ring 200 is wavy and is woven crosswise with the woven fan 120.

[0031] In this embodiment, by adding an expansion ring 200 to the opening of the thrombus protection unit 100, the thrombus protection unit 100 is opened before thrombus capture, facilitating thrombus capture and removal. Specifically, the thrombus protection unit 100 has a conical braided structure with braided fan blades 120 extending from the opening, which can cooperate with the guide wire to open the opening of the thrombus protection unit 100 and complete the delivery and removal of the thrombus protection unit 100 to the lesion site. The expansion ring 200 has a wavy cross-section. When the expansion ring 200 is braided to the connection position between the braided fan blades 120 and the thrombus-catching section 110 of the thrombus protection unit 100, i.e., the opening of the thrombus protection unit 100, it facilitates opening the opening of the thrombus protection unit 100. Furthermore, the wavy structure of the expansion ring 200 allows it to narrow towards the inside and expand towards the outside, thereby expanding the opening of the thrombus protection unit 100 and facilitating thrombus removal.

[0032] The braided fan blade 120 has a fan-shaped mesh structure, which can better conform to the blood vessel wall and prevent the device from moving within the blood vessel. At the same time, the fan-shaped mesh structure also provides sufficient support to ensure that the device will not be damaged due to excessive force when capturing thrombi. The thrombus protection unit 100 is woven from braided core yarns, and the braided fan blade 120 and the thrombus-catching section 110 are integrally formed, ensuring its good flexibility and conformability.

[0033] In one specific embodiment, the braided fan 120 is a fan-shaped mesh structure, which facilitates better adhesion to the inner wall of the blood vessel, prevents thrombus escape, and can be connected to the metal core wire of the guide wire to complete the removal of the thrombus protection unit 100 from the lesion site.

[0034] In one specific embodiment, the thrombosis protection unit 100 is a braided structure made of braided core yarn, and the braided fan 120 is integrally formed with the thrombosis protection unit 100, making the thrombosis protection unit 100 more robust and durable, while also ensuring its good flexibility and conformability.

[0035] In one specific embodiment, the expansion ring 200 is woven into the braided fan 120 of the thrombus protection unit 100 along the braiding direction of the thrombus protection unit 100. In this way, the expansion ring 200 can be fixed to the thrombus protection unit 100, preventing it from falling off or moving. Furthermore, the way the expansion ring 200 is woven into the thrombus protection unit 100 allows blood to flow normally from both the thrombus protection unit 100 and the expansion ring 200 without obstructing blood flow.

[0036] Furthermore, in this specific embodiment, the expansion ring 200 is a wavy annular structure, which is fixed to the opening of the thrombus protection unit 100 by weaving. The expansion ring 200 can expand and contract in the circumferential direction and provide support for the thrombus protection unit 100 in the axial direction, so that the thrombus protection unit 100 can remain stable when capturing thrombi, and can also prevent the thrombus protection unit 100 from being deformed or damaged due to excessive pressure.

[0037] In one specific embodiment, the thrombosis protector further includes a reinforcing core wire 300, the diameter of which is larger than the diameter of the braided core wire of the thrombosis protection unit 100. The reinforcing core wire 300 is braided along the distal end of the thrombosis protection unit 100 to the proximal end of the thrombosis protection unit 100, thereby further improving the strength and stability of the thrombosis protection unit 100.

[0038] Furthermore, in this specific embodiment, the braiding path of the reinforcing core wire 300 is the same as the braiding path of the thrombosis protection unit 100, so that the reinforcing core wire 300 can be combined with the thrombosis protection unit 100 to form an integral structure.

[0039] Furthermore, in this specific embodiment, the number of reinforcing core wires 300 is matched with the number of strands in the braided fan blades 120. The number of reinforcing core wires 300 woven in each braided fan blade 120 is an even number, and each braided fan blade 120 is woven with reinforcing core wires 300. Moreover, the braiding path of the braided core wires is the same as the braided core wire path in the thrombus protection unit 100, which can simultaneously improve the toughness and strength of the braided fan blades 120 and the thrombus-catching section 110 in the axial direction.

[0040] Among them, two or more reinforcing core wires 300 are symmetrically arranged relative to the braided fan blade 120 to improve the stability of the braided fan blade 120.

[0041] In this design, the same number of reinforcing core wires 300 are woven into each of the multiple braided fan blades 120, thereby providing a more uniform support force. The equidistant arrangement can also prevent stress concentration caused by the reinforcing core wires 300 being too concentrated.

[0042] In one specific embodiment, one axial end of the expansion ring 200 has multiple arc-shaped expansion portions. Each expansion portion matches any one of the braided fan blades 120 and is woven into the braided fan blade 120, with the axis of symmetry of the expansion portion overlapping the axis of symmetry of the braided fan blade 120. Each expansion portion matches one braided fan blade 120 and is woven into the braided fan blade 120, allowing the expansion ring 200 to be connected to the braided fan blade 120 to form an integral structure. The overlap of the axis of symmetry of the expansion portion and the axis of symmetry of the braided fan blade 120 ensures that the expansion ring 200 can evenly distribute stress when subjected to external force, preventing damage caused by stress concentration. When the device operates within a blood vessel, the expansion ring 200 can effectively support the thrombus protection unit 100, preventing it from deforming or moving due to blood flow.

[0043] Furthermore, the expansion ring 200 is a developing spring, a laser-cut developing tube, or a developing material for developing films.

[0044] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A thrombus capture device with an expanding opening, characterized in that, include: Thrombosis protection unit and dilation ring; The thrombus protection unit is a hollow structure with a proximal opening and a gradually decreasing diameter at the distal end, forming a cone shape. The distal end of the thrombus protection unit is woven with a mesh structure of woven fan-shaped blades. The expansion ring is a ring-shaped structure that is bent multiple times along the circumferential direction and is woven into the woven fan blade. The expansion ring is wavy and is woven crosswise with the woven fan blade.

2. The thrombus capture device with an expanding opening according to claim 1, characterized in that, The woven fan blades have a fan-shaped mesh structure.

3. The thrombus capture device with an expanding opening according to claim 2, characterized in that, It also includes a thrombus-catching section, wherein the thrombus protection unit is a braided structure made of braided core yarn, and the braided fan blades are integrally formed with the thrombus-catching section.

4. The thrombus capture device with an expanding opening according to any one of claims 1-3, characterized in that, The expansion ring is embedded in the thrombus protection unit along the weaving direction of the thrombus protection unit.

5. The thrombus capture device with an expanding opening according to any one of claims 1-3, characterized in that, Also includes: Reinforcing core wire; The diameter of the reinforcing core wire is larger than the diameter of the braided core wire of the thrombus protection unit; The reinforcing core wire is woven into the braided fan blade along the distal end of the thrombosis protection unit.

6. The thrombus capture device with an expanding opening according to claim 5, characterized in that, The braiding path of the reinforcing core wire is the same as that of the braided core wire of the thrombus protection unit.

7. The thrombus capture device with an expanding opening according to claim 6, characterized in that, The number of reinforcing core wires woven in each of the woven fan blades is an even number.

8. The thrombus capture device with an expanding opening according to claim 7, characterized in that, Two or more of the reinforcing core wires are symmetrically arranged relative to the braided fan blades.

9. The thrombus capture device with an expanding opening according to claim 1, characterized in that, One axial end of the expansion ring has multiple arc-shaped expansion portions, each of which matches any one of the braided fan blades and is woven into the braided fan blade, and the axis of symmetry of the expansion portion overlaps with the axis of symmetry of the braided fan blade.

10. The thrombus capture device with an expanding opening according to claim 1, characterized in that, The expansion ring is a developing spring, a laser-cut developing tube, or a developing material of a developing film.

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