Novel thrombus aspiration device

Abstract

The invention discloses a novel thrombus aspiration device which comprises a catheter, a cutting assembly and an adjusting assembly, a working space is defined by the catheter, a contact part is formed at one end of the catheter, a connecting end is formed at the other end of the catheter, the cutting assembly is movably arranged in the working space, and a hollow adjusting space is formed in the inner wall of the catheter. A contact hole is formed in the contact part, the contact hole is communicated with the adjusting space, and the adjusting assembly is suitable for controlling the negative pressure in the adjusting space. According to the novel thrombus aspiration device, the adjusting assembly is arranged to control the intensity of the negative pressure in the adjusting space, so that the aspiration device can aspirate thrombus in the catheter from multiple angles; when the thrombus is cut by the cutting assembly, the thrombus residual part is prevented from escaping from the catheter, the thrombus suction efficiency is high, the situation that a large amount of blood of a patient can be sucked in due to suction inertia after the thrombus cutting part is cut off can be avoided, and damage to the patient due to thrombus suction is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and specifically refers to a novel thrombus aspiration device. Background Art

[0002] A thrombus is a small piece formed on the surface of the exfoliation or repair site of the blood vessel inner surface in the cardiovascular system. It needs to be treated with drugs or cleaned by physical means. Commonly used physical means are mostly interventional treatments. For example, an aspiration device is inserted into the patient's blood vessel to directly aspirate the thrombus. Due to different formation reasons and times of the thrombus, there are differences in physical properties. For example, different thrombi have different volumes and surface hardness. Larger and harder thrombi need to be partially cut to facilitate aspiration.

[0003] In the prior art, cutting and aspiration of thrombi are carried out simultaneously. Aspiration is achieved by applying negative pressure in the catheter. The cutting device in the catheter cuts the part of the thrombus inhaled into the catheter. However, after cutting a part of the thrombus, the pressure disorder at the cutting surface will cause the remaining thrombus to escape from the catheter, and it is necessary to reposition the thrombus position and aspirate again, which not only reduces the efficiency of thrombus aspiration, but also inhales a large amount of the patient's blood, causing harm to the patient.

[0004] Therefore, those skilled in the art need an aspiration device that can stably aspirate thrombi and has a high efficiency of thrombus aspiration to overcome the above problems. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a novel thrombus aspiration device. To solve the technical defects that the thrombus aspiration device has a low efficiency of thrombus aspiration and cannot stably aspirate thrombi, the present invention creatively controls the negative pressure intensity in the adjustment space by setting an adjustment component, so that the aspiration device can aspirate thrombi in the catheter from multiple angles. When the cutting component cuts the thrombus, it prevents the remaining part of the thrombus from escaping from the catheter. It not only has a high efficiency of thrombus aspiration, but also can avoid the aspiration inertia after cutting off the excised part of the thrombus from inhaling a large amount of the patient's blood, reducing the harm caused by thrombus aspiration to the patient.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The present invention provides a novel thrombus aspiration device, which includes a catheter, a cutting assembly and an adjustment assembly. The catheter defines a working space. One end of the catheter is formed with a contact portion extending obliquely, and the other end of the catheter is formed with a connection end. The cutting assembly is movably disposed in the working space. A hollow adjustment space is formed in the inner wall of the catheter. A contact hole is formed in the contact portion, and the contact hole communicates with the adjustment space. A part of the adjustment assembly is disposed in the working space, and another part of the adjustment assembly is disposed in the adjustment space. The adjustment assembly is adapted to control the negative pressure in the adjustment space.

[0008] According to the novel thrombus aspiration device of the present invention, by providing an adjustment assembly to control the negative pressure intensity in the adjustment space, the aspiration device can aspirate thrombus in the catheter from multiple angles. When the cutting assembly cuts the thrombus, it can prevent the residual part of the thrombus from escaping from the catheter. It not only has a high aspiration efficiency for thrombus, but also can avoid the aspiration inertia after cutting off the excised part of the thrombus from sucking a large amount of blood from the patient, reducing the harm caused by aspirating thrombus to the patient.

[0009] According to some embodiments of the present invention, the cutting assembly includes a cutting head, a telescopic support column and a base. The base is fixedly connected to the connection end. The support column is rotatably connected to the base. The cutting head is annularly connected to the end of the support column away from the base. An adjustment port is formed at the inner wall of the catheter adjacent to the base, and the adjustment port communicates with the adjustment space, which is convenient for peeling the thrombus from the inner wall of the attached blood vessel or reducing the volume of the thrombus with a harder surface, so as to realize the gradual cutting and gradual aspiration of the thrombus.

[0010] According to some embodiments of the present invention, the connection end is a Luer connector. A first cutting portion extending in a direction away from the base is formed on the cutting head. A second cutting portion extending in the circumferential direction of the support column is formed on the cutting head. An aspiration port communicating with the working space is formed on the catheter, and the aspiration port is isolated from the adjustment space to prevent thrombus fragments from entering the adjustment space.

[0011] According to some embodiments of the present invention, the adjustment assembly includes a pressure control module and an operation module. The pressure control module is movably disposed in the adjustment space. The operation module is disposed in the working space and the operation module cooperates with the support column. The operation module is adapted to control the pressure control module to open or close the contact hole and the adjustment port. The cutting head is linked with the pressure control module, which is convenient for adjusting the opening and closing states of the contact hole and the adjustment port according to the cutting condition of the cutting head.

[0012] According to some embodiments of the present invention, there are two sets of the contact holes which are oppositely arranged in the circumferential direction. The pressure control module includes a first rotating ring, a connecting part, a second rotating ring and a pressure control gear. The first rotating ring is adapted to open or close the contact holes. The second rotating ring is adapted to open or close the adjustment opening. The connecting part connects the first rotating ring and the second rotating ring. The pressure control gear is adapted to drive the second rotating ring to rotate and the pressure control gear cooperates with the operation module, facilitating connecting the cutting component and the adjustment component into an integral structure for collaborative work.

[0013] According to some embodiments of the present invention, the suction device includes a hanging weight part which is arranged on the outer wall of the catheter and communicates with the adjustment space. A movable counterweight is arranged in the hanging weight part. The counterweight is adapted to control the negative pressure intensity in the adjustment space by moving along the vertical direction, which is beneficial for the contact part to adsorb the thrombus tissue more stably.

[0014] According to some embodiments of the present invention, the operation module includes an operation rotating wheel, a first gear for driving the support column to rotate and a linkage shaft for driving the pressure control gear to rotate. The operation rotating wheel cooperates with the first gear. The operation rotating wheel and the pressure control gear jointly rotate around the linkage shaft. An operation opening is formed on the catheter. A part of the operation rotating wheel extends out of the operation opening, facilitating the operation of medical staff and being beneficial for connecting the cutting component and the adjustment component into an integral structure for collaborative work.

[0015] According to some embodiments of the present invention, a limiting part is formed on the side wall of the catheter. The limiting part is adapted to limit the rotation range of the second rotating ring, improving the reliability of the suction device.

[0016] According to some alternative embodiments of the present invention, the suction device includes a sealing member which is arranged in the working space and is located between the suction opening and the operation rotating wheel in the extending direction of the catheter, improving the structural rationality of the suction device.

[0017] The beneficial effects achieved by the present invention with the above structure are as follows:

[0018] (1) The suction device can suck the thrombus in the catheter from multiple angles. When the cutting component cuts the thrombus, it can prevent the residual part of the thrombus from escaping from the catheter. It not only has a high suction efficiency for the thrombus, but also can avoid the suction inertia after cutting off the thrombus resection part from sucking a large amount of blood of the patient, reducing the harm caused by sucking the thrombus to the patient.

[0019] (2) The cutting component can rotate and cut or twist the thrombus tissue, facilitating peeling the thrombus from the inner wall of the attached blood vessel or reducing the volume of the harder thrombus on the surface, thereby realizing the gradual cutting and gradual suction of the thrombus.

[0020] (3) The cut thrombus fragments can flow from the gap between the first cutting parts to the suction port, preventing the thrombus fragments from entering the adjustment space;

[0021] (4) The operation module can simultaneously control the cutting component and the pressure control module, enabling the cutting head to be linked with the pressure control module, which is convenient for adjusting the opening and closing states of the contact hole and the adjustment port according to the cutting situation of the cutting head;

[0022] (5) The operation module has a simple and stable structure, which is convenient for connecting the cutting component and the adjustment component into an overall structure for coordinated operation;

[0023] (6) The hanging weight part can maintain and further reduce the air pressure in the adjustment space, which is beneficial for the contact part to more stably adsorb the thrombus tissue;

[0024] (7) It is convenient for medical staff to operate, and is beneficial for connecting the cutting component and the adjustment component into an overall structure for coordinated operation;

[0025] (8) Ensure the stability of the independent adsorption of the contact hole on the thrombus surface when the suction device continuously cuts the thrombus tissue, thereby improving the reliability of the suction device;

[0026] (9) Ensure the discharge of blood and thrombus fragments from the suction port, improving the structural rationality of the suction device.

[0027] Additional aspects and advantages of the present invention will be given in the following description, some of which will become apparent from the following description, or can be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of a novel thrombus suction device according to some embodiments of the present invention;

[0029] Figure 2 is Figure 1 an enlarged view of part A in

[0030] Figure 3 is a perspective view of a novel thrombus suction device from another angle according to some embodiments of the present invention;

[0031] Figure 4 is a top view of a part of the structure of a novel thrombus suction device according to some embodiments of the present invention;

[0032] Figure 5 is a perspective view of a part of the structure of a novel thrombus suction device according to some embodiments of the present invention;

[0033] Figure 6 is Figure 5 an enlarged view of part B in

[0034] Figure 7 It is a perspective view from another angle of a partial structure of a novel thrombus aspiration device according to some embodiments of the present invention;

[0035] Figure 8 It is a side view of a partial structure of a novel thrombus aspiration device according to some embodiments of the present invention;

[0036] Figure 9 It is a cross-sectional view along Figure 8 the C-C line in

[0037] Figure 10 It is a perspective view of a partial structure of a novel thrombus aspiration device according to some embodiments of the present invention.

[0038] Explanation of reference numerals in the figure:

[0039] Catheter 1; working space 11; contact part 12; contact hole 121; connection end 13; adjustment space 14; adjustment port 15; aspiration port 16; operation port 17; limiting part 18;

[0040] Cutting assembly 2; cutting blade head 21; first cutting part 211; second cutting part 212; support column 22; base 23;

[0041] Adjustment assembly 3; pressure control module 31; first rotating ring 311; connection part 312; second rotating ring 313; pressure control gear 314; operation module 32; operation rotating wheel 321; first gear 322; linkage shaft 323;

[0042] Suspension weight part 4.

[0043] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0046] Reference Figure 1 and Figure 3 , the present invention provides a novel thrombus aspiration device, including a catheter 1, a cutting assembly 2 and an adjustment assembly 3. The catheter 1 defines a working space 11. The catheter 1 can be inserted into the patient's blood vessel and aspirate the thrombus into the working space 11. The tube wall of the catheter 1 has the functions of supporting and accommodating other components of the aspiration device and temporarily storing the thrombus. One end of the catheter 1 is formed with a contact portion 12 extending obliquely, for example, the contact portion 12 extends obliquely towards the center of the catheter 1. When the aspiration device aspirates a relatively large thrombus, the contact portion 12 can fully contact the surface of the thrombus, which is beneficial to stably aspirate part of the tissue of the thrombus into the working space 11 for subsequent cutting. At the same time, the surface of the thrombus can be adsorbed through the contact portion 12, further improving the aspiration effect and stability of the aspiration device. The other end of the catheter 1 is formed with a connection end 13, and the connection end 13 can be connected to other external medical device devices, such as a filter, so as to filter the thrombus and return the blood to the patient's blood vessel, or can be connected to a guiding hose and can extend into a deeper blood vessel of the patient.

[0047] The cutting assembly 2 is movably arranged in the working space 11. For a relatively large thrombus that cannot be aspirated into the catheter 1 as a whole at one time, part of the tissue of the thrombus can be first aspirated into the working space 11. The cutting assembly 2 can cut and twist the thrombus tissue aspirated into the working space 11. For a relatively fresh thrombus with a short formation time, the cutting assembly 2 can peel the thrombus from the attached blood vessel inner wall through the twisting action on the thrombus, and then the cutting assembly 2 can cut the thrombus along the axial direction of the catheter 1 multiple times to gradually reduce the volume of the remaining thrombus tissue and finally aspirate the thrombus completely. For a thrombus with surface fibrosis or calcification and a long formation time, part of the tissue of the thrombus can be first aspirated into the working space 11. The cutting assembly 2 can cut the thrombus tissue aspirated into the working space 11 in multiple directions. For example, by cutting the thrombus along the axial and circumferential directions of the catheter 1 multiple times by the cutting assembly 2, the volume of the remaining thrombus tissue can be gradually reduced and finally the thrombus can be completely removed.

[0048] A hollow adjustment space 14 is formed in the inner wall of the catheter 1, and a contact hole 121 is formed in the contact portion 12. The contact hole 121 communicates with the adjustment space 14, so that the working space 11 communicates with the adjustment space 14 through the contact hole 121. When the thrombus tissue is inhaled into the working space 11, the contact hole 121 can also contact the surface of the thrombus tissue. At this time, by applying negative pressure to the adjustment space 14, the adjustment space 14 can attract the surface of the thrombus through the contact hole 121, so that the aspiration device can adsorb the thrombus tissue from multiple angles and with a larger area, and the stability of the thrombus contained in the working space 11 can be improved. A part of the adjustment component 3 is arranged in the working space 11, and another part of the adjustment component 3 is arranged in the adjustment space 14. The adjustment component 3 is adapted to control the negative pressure in the adjustment space 14. The adjustment component 3 located in the working space 11 can control the cutting component 2, and the adjustment component 3 located in the adjustment space 14 can control the negative pressure in the adjustment space 14 according to the cutting condition of the cutting component 2, so as to adjust the adsorption strength of the contact portion 12.

[0049] When medical staff use the aspiration catheter 1 to aspirate thrombus, the medical staff first insert the catheter 1 near the thrombus in the patient's blood vessel. For a relatively large thrombus, it is necessary to first aspirate a part of the thrombus tissue into the working space 11, and cut the thrombus through the cutting component 2 to achieve gradual cutting and gradual aspiration, and finally completely aspirate the thrombus. In the prior art, for the part of the thrombus inhaled into the catheter, even if the catheter maintains a negative pressure state, when the cutting knife cuts and separates the thrombus into thrombus fragments, the pressure disorder at the cutting surface will cause the remaining part of the thrombus to escape from the catheter. The medical staff need to aspirate the thrombus into the catheter again, with low efficiency and a large amount of the patient's blood will be aspirated. In the aspiration device of the present invention, the contact portion 12 contacts and adsorbs the thrombus tissue. Even when the pressure at the cutting surface is disordered instantaneously when the cutting component 2 cuts the thrombus, the contact portion 12 can continuously generate suction force on the surface of the thrombus, preventing the remaining part of the thrombus from escaping, so that the thrombus can maintain the state where part of the tissue is inhaled into the working space 11, avoiding the aspiration inertia after cutting off the thrombus resection part from inhaling a large amount of the patient's blood, thereby improving the aspiration efficiency of the aspiration device for thrombus and reducing the harm caused to the patient during the aspiration process.

[0050] According to the novel thrombus aspiration device of the present invention, by setting the adjustment component 3 to control the negative pressure intensity in the adjustment space 14, the aspiration device can aspirate the thrombus in the catheter 1 from multiple angles. When the cutting component 2 cuts the thrombus, it can prevent the remaining part of the thrombus from escaping from the catheter 1. It not only has a high aspiration efficiency for thrombus, but also can avoid the aspiration inertia after cutting off the thrombus resection part from inhaling a large amount of the patient's blood, reducing the harm caused by aspirating thrombus to the patient.

[0051] Reference Figure 1 and Figure 2, according to some embodiments of the present invention, the cutting assembly 2 includes a cutting head 21, a telescopic support column 22 and a base 23. The base 23 is fixedly connected to the connection end 13. The support column 22 is rotatably connected to the base 23. The cutting head 21 is annularly connected to one end of the support column 22 away from the base 23. The cutting head 21 can cut the thrombus tissue sucked into the catheter 1 into smaller thrombus fragments. By directly contacting the thrombus tissue with the cutting assembly 2 and continuously subjecting the thrombus tissue to negative pressure suction, the thrombus tissue can pass through the cutting assembly 2 and be cut into smaller thrombus fragments during the process. The support column 22 can also drive the cutting assembly 2 to rotate, so that the cutting assembly 2 can rotate and cut or twist the thrombus tissue, facilitating the peeling of the thrombus from the inner wall of the attached blood vessel or reducing the volume of the thrombus with a harder surface, thereby realizing the step-by-step cutting and step-by-step suction of the thrombus. An adjustment port 15 is formed at the inner wall adjacent to the base 23. The adjustment port 15 communicates with the adjustment space 14, so that the negative pressure intensity in the working space 11 can affect the negative pressure intensity in the adjustment space 14. When the adjustment port 15 is opened, by applying a higher negative pressure intensity to the working space 11, the adjustment space 14 also has a higher negative pressure intensity, thereby improving the adsorption intensity of the contact part 12 on the surface of the thrombus.

[0052] Reference Figures 1 - 3 , according to some embodiments of the present invention, the connection end 13 is a Luer connector, which is convenient for connecting the connection end 13 to other medical device devices. A first cutting part 211 extending in the direction away from the base 23 is formed on the cutting head 21. A second cutting part 212 extending in the circumferential direction of the support column 22 is formed on the cutting head 21. A suction port 16 communicating with the working space 11 is formed on the catheter 1, and the suction port 16 is isolated from the adjustment space 14. Other medical device devices can be externally connected to the suction port 16. For example, a suction machine that provides negative pressure for the working space 11 is connected to the suction port 16. The first cutting part 211 can cut the thrombus tissue along the axial direction of the catheter 1, thereby gradually reducing the volume of the residual thrombus tissue. The second cutting part 212 can rotate and cut and twist the thrombus tissue along the circumferential direction of the catheter 1, thereby reducing the volume of the thrombus with a harder surface. The cut thrombus fragments can flow to the suction port 16 through the gaps between the first cutting parts 211, preventing the thrombus fragments from entering the adjustment space 14.

[0053] Reference Figures 4 - 10, according to some embodiments of the present invention, the adjusting assembly 3 includes a pressure control module 31 and an operation module 32. The pressure control module 31 is movably disposed in the adjustment space 14. The pressure control module 31 can control the negative pressure intensity in the adjustment space 14. At the same time, the pressure control module 31 can open and close the contact hole 121 and the adjustment port 15. When the pressure control module 31 opens the contact hole 121, the contact portion 12 can effectively adsorb the surface of the thrombus. When the pressure control module 31 closes the contact hole 121, the contact portion 12 can effectively guide the thrombus tissue to be sucked into the working space 11. When the pressure control module 31 opens the adjustment port 15, the adjustment space 14 communicates with the working space 11. When a negative pressure is applied to the working space 11 through the suction port 16, the adjustment space 14 is also in a negative pressure state. When the pressure control module 31 closes the adjustment port 15, the adjustment space 14 is closed from the working space 11, and the adjustment space 14 and the working space 11 independently adsorb the thrombus tissue. When the cutting assembly 2 cuts the thrombus tissue, even if a negative pressure fluctuation occurs in the working space 11, the stable negative pressure intensity in the adjustment space 14 enables the uncut part of the thrombus to be stably adsorbed on the contact portion 12. The operation module 32 is disposed in the working space 11 and the operation module 32 cooperates with the support column 22. The operation module 32 is adapted to control the pressure control module 31 to open or close the contact hole 121 and the adjustment port 15. The operation module 32 can drive the support column 22 to rotate, and then drive the cutting head 21 to rotate. The operation module 32 can also control the pressure control module 31 at the same time, so that the cutting head 21 and the pressure control module 31 are interlocked, which is convenient to adjust the opening and closing states of the contact hole 121 and the adjustment port 15 according to the cutting condition of the cutting head 21.

[0054] Reference Figures 4 - 10, according to some embodiments of the present invention, there are two sets of contact holes 121 which are oppositely arranged in the circumferential direction, which is beneficial to the contact part 12 stably adsorbing the surface of the thrombus. The pressure control module 31 includes a first rotating ring 311, a connecting part 312, a second rotating ring 313 and a pressure control gear 314. The first rotating ring 311 is adapted to open or close the contact hole 121. The first rotating ring 311 can rotate in the adjustment space 14 to open or close the contact hole 121. When the first rotating ring 311 rotates to a position overlapping with the contact hole 121, the first rotating ring 311 can close the contact hole 121. When the first rotating ring 311 rotates to a position spaced from the contact hole 121, the first rotating ring 311 can open the contact hole 121. The second rotating ring 313 is adapted to open or close the adjustment port 15. The second rotating ring 313 can rotate in the adjustment space 14 to open or close the adjustment port 15. When the second rotating ring 313 rotates to a position overlapping with the adjustment port 15, the second rotating ring 313 can close the adjustment port 15. When the second rotating ring 313 rotates to a position spaced from the adjustment port 15, the second rotating ring 313 can close the adjustment port 15. The connecting part 312 connects the first rotating ring 311 and the second rotating ring 313, so that when the second rotating ring 313 rotates, it can drive the first rotating ring 311 to rotate synchronously. For example, when the second rotating ring 313 rotates to a position closing the adjustment port 15, the connecting part 312 can drive the first rotating ring 311 to rotate to a position opening the contact hole 121. When the second rotating ring 313 rotates to a position opening the adjustment port 15, the connecting part 312 can drive the first rotating ring 311 to rotate to a position closing the contact hole 121. The pressure control gear 314 is adapted to drive the second rotating ring 313 to rotate and the pressure control gear 314 cooperates with the operation module 32. The structure is simple and stable, which is convenient for connecting the cutting assembly 2 and the adjustment assembly 3 into an integral structure that works cooperatively.

[0055] Reference Figures 4 - 10 , according to some embodiments of the present invention, the suction device includes a hanging weight part 4. The hanging weight part 4 is arranged on the outer wall of the catheter 1 and communicates with the adjustment space 14. A movable counterweight 41 is provided in the hanging weight part 4. The counterweight 41 is adapted to control the negative pressure intensity in the adjustment space 14 by moving along the vertical direction. When the working space 11 communicates with the adjustment space 14, a negative pressure is applied to the working space 11 through the suction port 16, and the air pressure in the adjustment space 14 decreases accordingly, causing the counterweight 41 to move upward. When the contact part 12 adsorbs the surface of the thrombus and the second rotating ring 313 closes the adjustment interface, the adjustment space 14 is temporarily in a closed state. At this time, the counterweight 41 moves downward under the influence of gravity, which can maintain and further reduce the air pressure in the adjustment space 14, which is beneficial to the contact part 12 more stably adsorbing the thrombus tissue.

[0056] Reference Figures 4 - 10, according to some embodiments of the present invention, the operation module 32 includes an operation rotating wheel 321, a first gear 322 for driving the support column 22 to rotate, and a linkage shaft 323 for driving the pressure control gear 314 to rotate. The operation rotating wheel 321 cooperates with the first gear 322. The operation rotating wheel 321 and the pressure control gear 314 jointly rotate around the linkage shaft 323. An operation port 17 is formed on the catheter 1, and a part of the operation rotating wheel 321 extends out of the operation port 17. Medical staff can drive the first gear 322 and the linkage shaft 323 to rotate synchronously by contacting and rotating the part of the operation rotating wheel 321 that extends out of the operation port 17. This is not only convenient for medical staff to operate, but also helps the cutting assembly 2 and the adjustment assembly 3 to be connected into an integral structure that works in coordination.

[0057] Reference Figures 4 - 10 , according to some embodiments of the present invention, a limiting portion 18 is formed on the side wall of the catheter 1. The limiting portion 18 is adapted to limit the rotation range of the second rotating ring 313. The limiting portion 18 can abut against the second rotating ring 313 and block the second rotating ring 313 from continuing to rotate after the second rotating ring 313 rotates a certain angle. For example, when the second rotating ring 313 rotates from the position of opening the adjustment port 15 to the position of closing the adjustment port 15, the limiting portion 18 can block the second rotating ring 313, so that the adjustment port 15 remains in a closed state continuously, thereby closing the adjustment space 14 and the working space 11. The adjustment space 14 and the working space 11 can independently adsorb thrombus tissues respectively. For example, when the second rotating ring 313 drives the first rotating ring 311 to rotate from the position of closing the contact hole 121 to the position of opening the contact hole 121, the limiting portion 18 can block the second rotating ring 313, so that the contact hole 121 remains in an open state continuously, enabling the contact portion 12 to continuously adsorb the thrombus surface. When the limiting portion 18 blocks the second rotating ring 313, the operation rotating wheel 321 can drive the first gear 322 to rotate, and at this time the linkage shaft 323 can remain stationary. The above design can ensure the stability of the contact hole 121 independently adsorbing the thrombus surface when the aspiration device continuously cuts the thrombus tissue, thereby improving the reliability of the aspiration device.

[0058] Reference Figures 4 - 10 , according to some alternative embodiments of the present invention, the aspiration device includes a seal. The seal is arranged in the working space 11 and is located between the aspiration port 16 and the operation rotating wheel 321 in the extending direction of the catheter 1. The seal can block the blood and thrombus fragments inhaled in the working space 11, ensuring that the blood and thrombus fragments are discharged from the aspiration port 16, and improving the structural rationality of the aspiration device.

[0059] The working principle of the aspiration device in the present invention is briefly described below. After the medical staff inserts the catheter 1 into the patient, first, the port of the catheter 1 is brought into contact with the surface of the thrombus to be aspirated. A suction machine connected to the suction port 16 provides negative pressure to the working space 11. At this time, the first rotating ring 311 closes the contact hole 121, and the second rotating ring 313 opens the adjustment port 15, so that the adjustment space 14 is also in a negative pressure state. As a result, the counterweight 41 rises. After a part of the thrombus tissue is aspirated into the working space 11, the medical staff can rotate the operation wheel 321 to drive the cutting head 21, the second rotating ring 313, and the first rotating ring 311 to rotate. During the process of the cutting head 21 twisting or cutting the thrombus tissue, the second rotating ring 313 closes the adjustment port 15 and the first rotating ring 311 opens the contact hole 121. The counterweight 41 descends to maintain and further reduce the air pressure in the adjustment space 14, so that the contact part 12 can adsorb the surface of the thrombus. After the thrombus aspiration is completed, the medical staff can turn back the operation wheel 321 to reset the first rotating ring 311 and the second rotating ring 313, and can aspirate the next thrombus.

[0060] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0061] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0062] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A novel thrombus aspiration device, characterized in that, Comprising: A catheter (1), a cutting assembly (2) and an adjusting assembly (3). The catheter (1) defines a working space (11). One end of the catheter (1) is formed with a contact portion (12) that extends obliquely. The other end of the catheter (1) is formed with a connection end (13). The cutting assembly (2) is movably disposed in the working space (11). A hollow adjusting space (14) is formed in the inner wall of the catheter (1). A contact hole (121) is formed on the contact portion (12), and the contact hole (121) communicates with the adjusting space (14). A part of the adjusting assembly (3) is disposed in the working space (11), and another part of the adjusting assembly (3) is disposed in the adjusting space (14). The adjusting assembly (3) is adapted to control the negative pressure in the adjusting space (14).

2. The novel thrombus aspiration device according to claim 1, characterized in that, The cutting assembly (2) includes a cutting head (21), a telescopic support column (22) and a base (23). The base (23) is fixedly connected to the connection end (13). The support column (22) is rotatably connected to the base (23). The cutting head (21) is annularly connected to one end of the support column (22) away from the base (23). An adjusting opening (15) is formed at the inner wall of the catheter (1) adjacent to the base (23), and the adjusting opening (15) communicates with the adjusting space (14).

3. The novel thrombus aspiration device according to claim 2, characterized in that, The connection end (13) is a Luer connector. A first cutting portion (211) extending in a direction away from the base (23) is formed on the cutting head (21). A second cutting portion (212) extending in the circumferential direction of the support column (22) is formed on the cutting head (21). A suction port (16) communicating with the working space (11) is formed on the catheter (1), and the suction port (16) is isolated from the adjusting space (14).

4. A novel thrombus aspiration device according to claim 3, wherein The adjusting assembly (3) includes a pressure control module (31) and an operation module (32). The pressure control module (31) is movably disposed in the adjusting space (14). The operation module (32) is disposed in the working space (11) and the operation module (32) cooperates with the support column (22). The operation module (32) is adapted to control the pressure control module (31) to open or close the contact hole (121) and the adjusting opening (15).

5. A novel thrombus aspiration device according to claim 4, characterized in that, There are two groups of the contact holes (121) and they are oppositely arranged in the circumferential direction. The pressure control module (31) includes a first rotating ring (311), a connecting portion (312), a second rotating ring (313) and a pressure control gear (314). The first rotating ring (311) is adapted to open or close the contact hole (121). The second rotating ring (313) is adapted to open or close the adjusting opening (15). The connecting portion (312) connects the first rotating ring (311) and the second rotating ring (313). The pressure control gear (314) is adapted to drive the second rotating ring (313) to rotate and the pressure control gear (314) cooperates with the operation module (32).

6. A novel thrombus aspiration device according to claim 5, characterized in that, The suction device includes a suspended weight part (4), the suspended weight part (4) is arranged on the outer wall of the conduit (1) and communicates with the adjustment space (14), a movable counterweight is arranged in the suspended weight part (4), and the counterweight is adapted to control the negative pressure intensity in the adjustment space (14) by moving in the vertical direction.

7. A novel thrombus aspiration device according to claim 6, characterized in that, The operation module (32) includes an operation runner (321), a first gear (322) for driving the support column (22) to rotate, and a linkage shaft (323) for driving the pressure control gear (314) to rotate. The operation runner (321) is matched with the first gear (322). The operation runner (321) and the pressure control gear (314) jointly rotate around the linkage shaft (323). An operation port (17) is formed on the conduit (1), and a part of the operation runner (321) extends out of the operation port (17).

8. A novel thrombus aspiration device according to claim 7, characterized in that, A limiting part (18) is formed on the side wall of the conduit (1), and the limiting part (18) is adapted to limit the rotation range of the second rotating ring (313).

9. A novel thrombus aspiration device according to claim 7, characterized in that, The suction device includes a seal, and the seal is arranged in the working space (11) and is located between the suction port (16) and the operation runner (321) in the extending direction of the conduit (1).

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