Thrombus aspiration assembly

Abstract

The utility model provides a thrombus aspiration subassembly relates to medical instrument technical field, the thrombus aspiration subassembly includes aspiration catheter, aspiration catheter includes main section and funnel section, the inner diameter of funnel section gradually increases towards the far end direction, the one end of funnel section with smaller inner diameter is connected with the far end of main section, and the one end of funnel section with smaller inner diameter is connected with the far end of main section. A core wire is arranged in a catheter cavity of the suction catheter, a cutting part is arranged at the far end of the core wire, and the cutting part is used for cutting thrombus. The thrombus aspiration assembly has high aspiration capacity, the core wire with the cutting part is arranged in the aspiration catheter, thrombus entering the aspiration catheter can be broken into small blocks through the cutting part when thrombus aspiration is conducted, and therefore the blocking condition is reduced; when thrombus blockage occurs in the aspiration catheter, the cutting part can be driven by the core wire to cut the thrombus at the blocked part, so that the aspiration catheter is quickly dredged, and the problem that the thrombus blocks the aspiration catheter in the thrombus aspiration operation is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a thrombus aspiration component. Background Art

[0002] Clinical studies have shown that thrombectomy is a highly effective treatment for acute stroke. International and national medical guidelines require that patients eligible for interventional thrombectomy undergo immediate intracranial thrombus removal.

[0003] Currently, the main thrombectomy methods include direct aspiration technique (ADAPT) and stent retriever (SR). Both have been shown to be highly effective. However, more studies have shown that ADAPT is more effective than SR, achieving faster recanalization, shortening the surgical recanalization time, and reducing costs.

[0004] In the prior art, a suction catheter is usually used to extract the thrombus. The suction catheter is sent to the thrombus site, and the thrombus is extracted from the proximal end of the thrombus by negative pressure to re-establish the blood flow dynamics. However, in the existing suction catheter, such as Figure 1 As shown, thrombosis is prone to occur. In this case, the aspiration catheter needs to be removed from the body and thrombolytic drugs or special dredging tools need to be used to clear the thrombus. Therefore, when the thrombus is blocked at the distal end of the aspiration catheter, it will affect the aspiration effect, increase the operation time, and increase the risk of the operation.

[0005] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0006] The purpose of the utility model is to provide a thrombus aspiration component, which can quickly clear the thrombus blocked in the aspiration catheter, so as to solve the problem of thrombus blocking the aspiration catheter during thrombus aspiration.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A thrombus aspiration assembly includes a suction catheter, which includes a main body section and a funnel section. The inner diameter of the funnel section gradually increases toward the distal end, and the end of the funnel section with a smaller inner diameter is connected to the distal end of the main body section. A core wire is provided in the lumen of the suction catheter, and a cutting portion is provided at the distal end of the core wire. The cutting portion is used to cut the thrombus.

[0009] Preferably, the number of the cutting parts is one or more.

[0010] Preferably, the shape of the cutting portion is selected from a triangle, a rectangle, a wave shape and a semicircle, and the edge of the cutting portion is provided with a cutting edge.

[0011] Preferably, when there are multiple cutting parts, the cutting parts are alternately arranged up and down along the axial direction of the core wire.

[0012] Preferably, the diameter of the core wire gradually decreases toward the distal end.

[0013] Preferably, a first developing point is provided at the distal end of the main body segment, and a second developing point is provided at the distal end of the funnel segment.

[0014] Preferably, the core wire is fixed to the inner cavity of the suction catheter by an adhesive.

[0015] Preferably, a third developing point is provided at the distal end of the core wire.

[0016] Preferably, the third development point is a development ring.

[0017] Preferably, the third developing point is a developing spring.

[0018] Beneficial effects:

[0019] (1) The present application provides a core wire in the lumen of the suction catheter. During suction, thrombi that enter the suction catheter are cut into pieces by the cutting portion at the distal end of the core wire, thereby making it less likely for blockage to occur. If blockage occurs, the core wire can be twisted or pulled, and the cutting portion can be used to actively cut the blocked thrombus, thereby quickly clearing the thrombus blocked in the suction catheter.

[0020] (2) A funnel section is provided at the distal entrance of the suction catheter, which increases the diameter of the distal end of the suction catheter, facilitating the suction of thrombus into the suction catheter;

[0021] (3) A developing point is provided at the distal end of the main section and the funnel section of the suction catheter, and a developing point is also provided at the distal end of the core wire, which can be used to determine the position of the distal end of the core wire relative to the suction catheter during surgery to prevent the distal end of the core wire from extending out of the funnel section and cutting the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of this application are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention.

[0023] Figure 1 This is a schematic diagram of a suction catheter being blocked by a thrombus in the prior art.

[0024] Figure 2 A schematic structural diagram of a thrombus aspiration assembly provided in an embodiment of the present utility model.

[0025] Figure 3 This is a schematic diagram of a rectangular cutting portion in an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of a wavy cutting portion in an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of a semicircular cutting portion in an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of an embodiment of the present invention having multiple cutting parts.

[0029] Figure 7 This is a structural schematic diagram of a thrombus aspiration component provided in Example 4 of the present utility model.

[0030] In the figure: 100, main body section; 200, funnel section; 300, core wire; 101, first developing point; 201, second developing point; 301, cutting part; 302, third developing point. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0036] In the description of the present invention, "proximal end" refers to the end close to the operator, and "distal end" refers to the end far away from the operator. Generally, the right side in the drawings of the present invention is the "distal end" and the left side is the "proximal end".

[0037] The present invention will be described in detail below with reference to the embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0038] The utility model aims to solve the problem that thrombus is easy to block the aspiration catheter during current thrombus aspiration, and provides a thrombus aspiration component, including a suction catheter, such as Figure 2 As shown, the suction catheter includes a main body section 100 and a funnel section 200, wherein the inner diameter of the funnel section 200 gradually increases toward the distal end, and the end of the funnel section 200 with a smaller inner diameter is connected to the distal end of the main body section 100, so that the inner diameter at the entrance of the suction catheter is larger, and when the thrombus is aspirated, the thrombus can be more easily sucked into the suction catheter; a core wire 300 is provided in the lumen of the suction catheter, and the distal end of the core wire 300 is connected to a cutting portion 301, and the edge of the cutting portion 301 is provided with a cutting edge for cutting the thrombus.

[0039] Through the above arrangement, when thrombus aspiration is performed, the cutting portion 301 can be used to break the thrombus entering the aspiration catheter into small pieces, thereby reducing the occurrence of blockage caused by the thrombus entering the aspiration catheter due to its excessive volume; when thrombus blockage occurs in the aspiration catheter, the core wire 300 can be used to drive the cutting portion 301 to cut the thrombus at the blocked site, thereby quickly clearing the aspiration catheter and saving the time required to clear the aspiration catheter, thereby solving the problem of thrombus blocking the aspiration catheter during thrombus aspiration.

[0040] In the preferred embodiment of the present utility model, Figures 2 to 5 As shown, the shape of the cutting portion 301 is selected from a triangle, a rectangle, a wave and a semicircle.

[0041] In the preferred embodiment of the present invention, the number of the cutting portion 301 is one, or it can be multiple; when the number of the cutting portion 301 is multiple, such as Figure 6As shown, the cutting parts 301 are alternately arranged up and down along the axis of the core wire 300. When the size of the thrombus entering the suction catheter is larger than the height of a single cutting part 301, the thrombus can be completely cut through the cutting parts 301 arranged up and down without rotating the core wire 300.

[0042] In a preferred embodiment of the present invention, the diameter of the core wire 300 gradually decreases toward the distal end. The core wire 300 with this structure has higher rigidity and anti-twisting ability than a core wire 300 of the same diameter.

[0043] In the preferred embodiment of the present utility model, Figure 7 As shown, a first developing point 101 is provided at the distal end of the main body segment 100, a second developing point 201 is provided at the distal end of the funnel segment 200, and a third developing point 302 is provided at the distal end of the core wire 300. During the use of the suction catheter, the position of the core wire 300 relative to the suction catheter can be judged by the first developing point 101, the second developing point 201 and the third developing point 302. In particular, when the core wire 300 is pushed and pulled axially, the core wire 300 can be prevented from extending out of the funnel portion, thereby preventing the cutting portion 301 from accidentally puncturing or cutting the blood vessel.

[0044] Specifically, the first developing point 101 , the second developing point 201 and the third developing point 302 are developing rings, which may also be replaced by developing springs.

[0045] In the present invention, the design of the suction catheter and the core wire 300 is highly flexible. On the one hand, they can be fixed together, for example, by bonding with an adhesive to form a stable whole, thereby ensuring stability and coordination during operation. This fixed design enables the suction catheter and the core wire 300 to be operated as a whole. The guide wire accurately guides the suction catheter to the lesion site. At this time, the suction catheter and the core wire 300 both reach the predetermined position. Then, only the guide wire needs to be withdrawn, thereby improving the efficiency of the operation. On the other hand, the suction catheter and the core wire 300 can also be used separately. The guide wire accurately guides the suction catheter to the lesion site. After ensuring that the suction catheter is stable and accurately positioned, the guide wire is withdrawn. After successfully withdrawing the guide wire, the core wire 300 is ready to be inserted. The insertion process of the core wire 300 needs to be slow and steady to ensure that it can smoothly reach the predetermined position, thereby improving its scope of application.

[0046] The thrombus aspiration assembly of the present invention is described in detail below through specific embodiments.

[0047] Example 1

[0048] This embodiment provides a thrombus aspiration component, such as Figure 2As shown, the suction catheter includes a main body section 100 and a funnel section 200. The outer diameter of the funnel section 200 is the same as that of the main body section 100, and the inner diameter of the funnel section 200 gradually increases toward the distal end. The end of the funnel section 200 with a smaller inner diameter is connected to the distal end of the main body section 100. By providing the funnel section 200, the inner diameter at the entrance of the suction catheter is made larger without increasing the outer diameter of the suction catheter, so that the thrombus is more easily sucked into the suction catheter.

[0049] A core wire 300 is provided in the lumen of the suction catheter. A triangular cutting portion 301 is provided at the distal end of the core wire 300. A cutting edge is provided at the edge of the cutting portion 301. When a thrombus enters the suction catheter and encounters the cutting edge of the cutting portion 301, it will be cut into small pieces of thrombus by the cutting portion 301, making it less likely to block the suction catheter. The core wire 300 can also be twisted during suction to crush the thrombus that has entered the suction catheter.

[0050] In this embodiment, the diameter of the core wire 300 gradually decreases toward the distal end. The core wire 300 with this structure has higher rigidity and anti-twisting ability.

[0051] When the suction catheter is blocked by a thrombus, the core wire 300 is pulled to make the cutting portion 301 contact the thrombus that causes the blockage. After repeated cutting for several times, the blocked suction catheter can be cleared.

[0052] Example 2

[0053] This embodiment provides a thrombus aspiration assembly that is different from the embodiment 1. The difference is that the shape of the cutting portion 301 is rectangular. Figure 4 shown.

[0054] Example 3

[0055] This embodiment provides a thrombus aspiration assembly, which is improved on the basis of embodiment 1, such as Figure 6 As shown, the difference is that the number of the cutting parts 301 is four, and they are alternately arranged up and down along the axial direction of the core wire 300.

[0056] This arrangement can enhance the ability of the core wire 300 to cut thrombi, so that the thrombi entering the aspiration catheter can be broken into smaller fragments, further reducing the probability of clogging the aspiration catheter.

[0057] Example 4

[0058] This embodiment provides a thrombus aspiration assembly, which is improved on the basis of embodiment 1, such as Figure 7 As shown, the difference is that a first developing point 101 is provided at the distal end of the main body section 100 , a second developing point 201 is provided at the distal end of the funnel section 200 , and a third developing point 302 is provided at the distal end of the core wire 300 .

[0059] Specifically, the first developing point 101, the second developing point 201 and the third developing point 302 are all developing rings. During the use of the suction catheter, the position of the core wire 300 relative to the suction catheter can be judged by the first developing point 101, the second developing point 201 and the third developing point 302. In particular, when the core wire 300 is pushed and pulled axially, the core wire 300 can be prevented from extending out of the funnel part, thereby preventing the cutting part 301 from accidentally puncturing or cutting the blood vessel.

[0060] In summary:

[0061] The present application arranges a core wire with a cutting portion in the suction catheter, and when thrombus aspiration is performed, the cutting portion can be used to break the thrombus entering the suction catheter into small pieces, thereby reducing the occurrence of blockage due to excessive volume of the thrombus after entering the suction catheter; when thrombus blockage occurs in the suction catheter, the cutting portion can be driven by the core wire to cut the thrombus at the blocked part, thereby quickly clearing the suction catheter and saving the time required to clear the suction catheter; in addition, by arranging a funnel section at the entrance of the suction catheter, the thrombus can be more easily sucked into the suction catheter, thereby improving the suction capacity of the suction catheter.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A thrombus aspiration assembly, comprising an aspiration catheter, characterized in that: The suction catheter includes a main body section and a funnel section. The inner diameter of the funnel section gradually increases toward the distal end. The end of the funnel section with a smaller inner diameter is connected to the distal end of the main body section. A core wire is provided in the lumen of the suction catheter. A cutting portion is provided at the distal end of the core wire, and the cutting portion is used to cut a thrombus.

2. A thrombus aspiration assembly according to claim 1, characterized in that: The number of the cutting part is one or more.

3. The thrombus aspiration assembly according to claim 1, characterized in that: The shape of the cutting portion is selected from a triangle, a rectangle, a wave shape and a semicircle, and the edge of the cutting portion is provided with a cutting edge.

4. A thrombus aspiration assembly according to claim 2, characterized in that: When there are multiple cutting parts, the cutting parts are alternately arranged up and down along the axial direction of the core wire.

5. A thrombus aspiration assembly according to any one of claims 1 to 4, characterized in that: The diameter of the core wire gradually decreases toward the distal end.

6. A thrombus aspiration assembly according to any one of claims 1 to 4, characterized in that: A first developing point is provided at the distal end of the main body section, and a second developing point is provided at the distal end of the funnel section.

7. A thrombus aspiration assembly according to any one of claims 1 to 4, characterized in that: The core wire is fixed in the inner cavity of the suction catheter by an adhesive.

8. The thrombus aspiration assembly according to claim 6, characterized in that: The distal end of the core wire is provided with a third developing point.

9. The thrombus aspiration assembly according to claim 8, characterized in that: The third developing point is a developing ring.

10. The thrombus aspiration assembly according to claim 8, characterized in that: The third developing point is a developing spring.

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