Rotary cutting assembly and thrombus removing device

Abstract

The utility model provides a rotary cutting assembly and a thrombus removing device, and belongs to the field of vascular surgery removing instruments. The rotary cutting assembly comprises a supporting ring, a guide pipe arranged in the supporting ring, a cutter piece connected between the supporting ring and the guide pipe and a driving pipe, the supporting ring is of a hollow structure, the cutter piece comprises a plurality of linear cutters arranged in parallel, and a smashing gap for cutting and smashing thrombus blocks is formed between every two adjacent linear cutters; the multiple cutter parts are arranged and radiate towards the supporting ring with the guiding pipe as the center, every two adjacent cutter parts form a thrombus outflow channel, and the driving pipe is connected with the guiding pipe. According to the utility model, thrombus can be effectively prevented from blocking the catheter. The thrombus removing device comprises a rotary cutting assembly, a driving tube, a catheter and a guide wire. The rotary cutting assembly is rotatably arranged in the catheter in a sleeved mode, and the guide wire is rotatably arranged in the rotary cutting assembly in a sleeved mode. The thrombus can be removed and discharged out of the catheter, and the situation that the thrombus adheres to the inner wall of the catheter is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the field of vascular surgical removal instruments, and more specifically, relates to a rotary cutting component and a thrombus removal device. Background Art

[0002] The field of vascular surgical removal devices focuses on developing precision tools for treating vascular diseases. These devices are designed to remove diseased material within blood vessels, such as thrombi, plaques, or foreign bodies. Common devices include catheters, balloons, stents, rotary extirpators, and ultrasonic removal devices. Catheters are inserted into blood vessels and combined with other devices to perform the removal procedure. Balloons are used to dilate narrowed blood vessels while simultaneously squeezing plaques. Stents are used to support the dilated blood vessels to prevent re-stenosis. Rotary extirpators use high-speed rotation to cut away thrombi, while ultrasonic devices use high-frequency sound waves to shatter and remove lesions within blood vessels. Advanced technologies also include image-guided systems that can monitor and adjust the treatment process in real time, improving the safety and effectiveness of surgery. Continuous innovation and improvement of these devices help improve the treatment of vascular diseases, reduce surgical risks, and enhance patients' quality of life.

[0003] Existing thrombus-removing devices often have blades arranged spirally along the device's axis. After removing the thrombus, the blades are removed from the catheter through a pre-defined spiral groove. However, this design only removes the thrombus without crushing it. As a result, the removed thrombus fragments vary in size and can easily become clogged in the catheter. Thrombus is sticky, and prolonged blockage can easily cause it to adhere to the catheter wall, making it difficult to completely remove the thrombus. Utility Model Content

[0004] The main purpose of the present application is to provide a rotary cutting assembly that can remove thrombi during rotation and crush thrombus blocks, effectively preventing thrombi from blocking the catheter.

[0005] Another object of the present application is to provide a thrombus removal device comprising the above-mentioned rotary cutting component, which can promptly remove the thrombus and discharge it out of the catheter, effectively reducing the occurrence of thrombus adhering to the inner wall of the catheter.

[0006] In order to achieve the above objectives, the present application proposes a rotary cutting assembly, comprising:

[0007] A support ring, a guide tube arranged in the support ring, a cutter piece and a drive tube connected between the support ring and the guide tube, wherein the support ring is a hollow structure.

[0008] The cutter piece includes a plurality of linear cutters arranged in parallel, and a crushing gap for cutting and crushing thrombus blocks is formed between two adjacent linear cutters; the cutter pieces are multiple and radiate toward the support ring with the guide tube as the center, and two adjacent cutter pieces form a thrombus outflow channel, and the driving tube is connected to the guide tube.

[0009] Furthermore, a diameter-reducing portion is provided at one end of the guide tube facing the thrombus, and the diameter of the diameter-reducing portion gradually decreases along the front end opening of the guide tube.

[0010] Furthermore, the opening radius at one end of the diameter-reducing portion is smaller than the opening radius at the end away from the diameter-reducing portion.

[0011] Furthermore, the front end opening of the guide tube is a circular structure, and the rear end opening of the guide tube is an elliptical structure.

[0012] Furthermore, the plane formed by the front end opening of the guide tube and the plane formed by the side end of the support ring are the same plane.

[0013] Thrombectomy devices, including:

[0014] A catheter, a rotary cutting assembly and a guide wire as described above, wherein the rotary cutting assembly can be rotatably sleeved in the catheter, and the guide wire can be rotatably sleeved in the rotary cutting assembly.

[0015] Furthermore, the diameter of one end of the guide wire facing the thrombus gradually decreases until it converges to the head end of the guide wire, and the head end of the guide wire is an arc-shaped structure.

[0016] Furthermore, a limiting ring is provided at one end of the catheter facing the thrombus to prevent the rotary cutting assembly from passing out of the catheter.

[0017] The rotary cutting assembly proposed in this utility model has the following beneficial effects:

[0018] The utility model can enable the rotary cutting component to remove the thrombus during the rotation process and can crush the thrombus blockage, effectively preventing the thrombus from blocking the catheter.

[0019] The present invention also provides a thrombus removal device, which has the following beneficial effects:

[0020] The utility model can timely remove the thrombus and discharge it out of the catheter, effectively reducing the occurrence of the thrombus adhering to the inner wall of the catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the positional relationship between the cutting member and the guide tube of the present invention;

[0022] Figure 2 This is a schematic structural diagram of the cutting blade of the utility model;

[0023] Figure 3 This is a schematic structural diagram of the guide tube of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the drive tube of the utility model;

[0025] Figure 5 This is a diagram showing the positional relationship between the guide tube and the connecting portion of the present invention;

[0026] Figure 6 This is a schematic structural diagram of the thrombus removal device of the present invention.

[0027] In the figure, 1. support ring, 2. guide tube, 21. reducing portion, 3. cutter piece, 31. linear cutter, 32. crushing gap, 4. catheter, 5. drive tube, 51. guide portion, 52. connecting portion, 53. guide wire through hole, 6. guide wire. DETAILED DESCRIPTION

[0028] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0029] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0030] Example

[0031] Existing thrombus-removing devices often have blades arranged spirally along the device's axis. After removing the thrombus, the blades are removed from the catheter through a pre-defined spiral groove. However, this design only removes the thrombus without crushing it. As a result, the removed thrombus fragments vary in size and can easily become clogged in the catheter. Thrombus is sticky, and prolonged blockage can easily cause it to adhere to the catheter wall, making it difficult to completely remove the thrombus.

[0032] Based on this, in order to solve the above problem that the removed thrombus cannot be crushed, resulting in the thrombus blocking the catheter, this embodiment provides a rotary cutting component, referring to Figure 1-4, comprising: a hollow support ring 1, a guide tube 2 with two through ends, and a cutter piece 3 connected between the support ring 1 and the guide tube 2. The guide tube 2 is fixed in the hollow part of the support ring 1 and extends along the axis of the support ring 1, with openings set at both ends of the guide tube 2. The cutter piece 3 comprises a plurality of parallel linear cutters 31, which are fixed between the support ring 1 and the guide tube 2 and arranged circumferentially along the center of the guide tube 2 to form a plurality of cutter pieces 3, refer to Figure 2 The gap 32 between adjacent linear cutters 31 is used to cut and pulverize clots, further reducing their size. Any adjacent cutter elements 3 form a clot outflow channel, allowing clots removed by the linear cutters 31 to be transported out of the guide tube 2 via a suction device (e.g., a medical suction pump). To enable the guide tube 2 to rotate, the drive tube 5 must be directly and securely connected to the guide tube 2, driving the rotation of the guide tube 2.

[0033] In this embodiment, three groups of cutting elements 3 are provided, arranged circumferentially along the central axis of the guide tube 2. The three groups of cutting elements 3 precisely form three thrombus outflow channels. When the driving tube 5 drives the guide tube 2 to rotate, it further drives the support ring 1 to rotate, and at this time, the three groups of cutting elements 3 can remove the thrombus. Since the linear cutters 31 of any group of cutting elements 3 are distributed along the direction of extension of the guide tube 2, forming a crushing gap 32, when the support ring 1 rotates, the linear cutters 31 of the same group of cutting elements 3 also rotate. The adjacent linear cutters 31 in the same group can squeeze and crush the thrombus through the crushing gap 32, thereby achieving the purpose of removing the thrombus and crushing the thrombus during the rotation process, effectively preventing the thrombus from blocking the catheter 4. Referring to the figure, the end of the guide tube 2 facing the thrombus is provided with a reducing portion 21. The diameter of the reducing portion 21 gradually decreases along the front opening of the guide tube 2, and the opening radius at the end of the reducing portion 21 is smaller than the opening radius at the end facing away from the reducing portion 21. The end with the smaller opening radius is defined as the front end of the guide tube 2, and the end with the larger opening radius is defined as the rear end of the guide tube 2. At this time, the guide wire 6 is introduced from the rear end of the guide tube 2 to the front end of the guide tube 2, and the reducing portion 21 can smoothly guide the guide wire 6 to the front end of the guide tube 2. Specifically, since the guide wire 6 is made of a flexible material, it is easy for the guide wire 6 to touch the inner wall of the guide tube 2 after entering the guide tube 2, causing deformation and being unable to be guided out smoothly. Since the front end of the guide tube 2 has a reducing portion 21, and the inner wall of the reducing portion 21 is a tapered structure, when the guide wire 6 touches the slope on the cone, the slope can smoothly guide the guide wire 6 to the opening, thereby avoiding the phenomenon that the guide wire 6 is deformed and cannot be guided out when it touches the inner wall of the guide tube 2. In addition, the tapered structure can reduce the resistance at the front end of the guide tube 2, making it easier to advance the cutting to the front end of the blood vessel. In order to allow the cutter 3 to smoothly allow the rotary cutting assembly to slide stably in the catheter 4 when removing the thrombus, the plane formed by the opening of the guide tube 2 and the plane formed by the side end of the support ring 1 are made to be the same plane.

[0034] It should be noted that, in the present invention, the number of the cutting blades 3 and the linear cutting blades 31 is not limited, and should be adaptively adjusted according to different blood vessel locations and thrombus sizes.

[0035] In some embodiments, reference Figure 3 , the front end opening of the guide tube 2 is a circular structure, and the rear end opening of the guide tube 2 is an elliptical structure. Figure 4-5As shown, the drive tube 5 includes a guide portion 51 and a connecting portion 52. The guide portion 51 has a circular cross-section, while the connecting portion 52 has an elliptical cross-section. A guide wire hole 53 is provided within the drive tube 5. The drive tube 5 is sleeved within the catheter 4, with its front connecting portion 52 connected to the elliptical structure of the guide tube 2, improving the fit between the drive tube 5 and the rotary cutter. The guide wire 6 is sleeved within the drive tube 5 through the guide wire hole 53, with the tip extending through the openings at both ends of the guide tube 2 and suspended outside the catheter 4.

[0036] The present invention also provides a thrombus removal device using the above rotary cutting assembly, referring to Figure 6 , comprising: a catheter 4, a guidewire 6, and the aforementioned rotary cutting assembly. The rotary cutting assembly is rotatably mounted within the catheter 4, and the guidewire 6 is rotatably mounted within the rotary cutting assembly. In some embodiments, the diameter of the guidewire 6 gradually decreases toward the end of the thrombus until it converges to the tip of the guidewire 6, which has an arc-shaped structure. This structure reduces resistance at the front end of the guidewire 6, facilitating passage of the guidewire 6 through the guide tube 2.

[0037] In some other embodiments, a limiting ring is provided at one end of the catheter 4 facing the thrombus to prevent the rotary cutting assembly from passing through the catheter 4, thereby preventing the linear cutter 31 from passing through the catheter 4 and causing damage to the blood vessel.

[0038] In the present invention, the drive tube 5 is driven by an external drive element, which can be electrically, hydraulically, or pneumatically driven. Specifically, the drive element drives the drive tube 5 to slide and rotate within the catheter 4, thereby driving the guide tube 2 to rotate. When the guide tube 2 rotates, it drives the linear cutter 31 to rotate, thereby excising and pulverizing the thrombus. The rotation of the rotary cutting assembly excises the thrombus and pulverizes the thrombus, effectively preventing thrombus blockage in the catheter 4. Furthermore, the thrombus can be promptly removed and expelled from the catheter 4, effectively reducing the risk of thrombus adhesion to the inner wall of the catheter 4. Specifically, during a thrombus removal procedure, medical personnel first insert a very thin and flexible guidewire 6 (such as the guidewire 6 described in the above embodiment) through the patient's blood vessels. This guidewire 6 typically serves as a guide, helping subsequent medical devices reach their target locations. The material and design of the guidewire 6 enable it to pass smoothly through the blood vessels, avoiding damage to the vessel walls. Next, the guide wire 6 will be carefully pushed along the path of the blood vessel by the medical staff and directly reach the location of the thrombus that needs to be removed. Then, a catheter 4 that is slightly thicker than the guide wire 6 will be pushed along the path of the guide wire 6. The function of this catheter 4 is to provide a channel so that the subsequent rotary cutting component can pass smoothly. The inner cavity of the catheter 4 usually has a certain degree of flexibility to adapt to the tortuosity of the blood vessel. Then, the rotary cutting component will enter the catheter 4 along the guidance of the guide wire 6 and be positioned at the thrombus at the end of the catheter 4. Finally, the rotary cutting component is driven by the driving member to rotate in the inner cavity of the catheter 4 to remove the thrombus.

[0039] In the description of the present invention, it should be understood that the terms "front end", "rear end", "upper", "lower", "inner", "outer", "axial direction", "circumference", etc. indicate orientations or positional relationships 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.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature "on" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. "Multiple" means at least two, such as two or three, unless otherwise expressly specified or limited.

[0041] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0042] The above is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention without creative work should be included in the scope of protection of the present invention.

Claims

1. A peeling assembly, characterized in that: include: A support ring, a guide tube arranged in the support ring, a cutter piece and a drive tube connected between the support ring and the guide tube, wherein the support ring is a hollow structure. The cutter piece includes a plurality of linear cutters arranged in parallel, and a crushing gap for cutting and crushing thrombus blocks is formed between two adjacent linear cutters; the cutter pieces are multiple and radiate toward the support ring with the guide tube as the center, and two adjacent cutter pieces form a thrombus outflow channel, and the driving tube is connected to the guide tube.

2. The peeling assembly according to claim 1, characterized in that: A diameter-reducing portion is provided at one end of the guide tube facing the thrombus, and the diameter of the diameter-reducing portion gradually decreases along the front end opening of the guide tube.

3. The peeling assembly according to claim 2, characterized in that: The opening radius at one end of the diameter-reducing portion is smaller than the opening radius at the end away from the diameter-reducing portion.

4. The peeling assembly according to claim 1, characterized in that The front end opening of the guide tube is a circular structure, and the rear end opening of the guide tube is an elliptical structure.

5. The peeling assembly according to claim 1, wherein: The plane formed by the front end opening of the guide tube and the plane formed by the side end of the support ring are the same plane.

6. A thrombus removal device, characterized in that: include: A catheter, a rotary cutting assembly according to any one of claims 1 to 5, and a guide wire, wherein the rotary cutting assembly can be rotatably sleeved in the catheter, and the guide wire can be rotatably sleeved in the rotary cutting assembly.

7. The thrombus removal device according to claim 6, characterized in that: The diameter of one end of the guide wire facing the thrombus gradually decreases until it gathers to the head end of the guide wire, and the head end of the guide wire is an arc-shaped structure.

8. The thrombus removal device according to claim 6, characterized in that: A limiting ring is provided at one end of the catheter facing the thrombus to prevent the rotary cutting assembly from passing out of the catheter.

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