Thrombus suction and filtration device for interventional therapy

Abstract

The invention discloses a thrombus aspirating and filtering device for interventional therapy. The thrombus aspirating and filtering device at least comprises a propeller, an outer catheter, an aspirating tube, an inner catheter, a connecting soft cylinder and a thrombus removing mechanism. The propeller is configured to be an operation part, the outer catheter is arranged at the front end of the propeller and is configured to be a hose, a certain propelling distance is formed between the outer catheter and the propeller, the suction pipe is arranged on the inner wall of the outer catheter in a communicating mode, the inner catheter is arranged at the front end of the outer catheter in a communicating mode, and the suction pipe is arranged on the inner wall of the outer catheter in a communicating mode. One end of the connecting soft cylinder is fixed to the front end of the propeller, the other end of the connecting soft cylinder sequentially penetrates through the outer catheter and the inner catheter in a sliding mode, and the thrombus removing mechanism is arranged at the front end of the inner catheter and used for completely removing thrombus from a blood vessel; wherein at least a negative pressure device is arranged in the suction pipe and is used for sucking thrombus.

Description

Technical Field

[0001] The present invention relates to the technical field of interventional therapy, and in particular to a thrombus aspiration and filtering device for interventional therapy. Background Art

[0002] The thrombus suction and filtration device is a medical device used for interventional treatment, mainly used to remove thrombi in blood vessels and restore blood flow. This device combines the two functions of thrombus suction and filtration. It can filter out impurities and harmful substances in the blood while suctioning thrombi, ensuring the safety and effectiveness of treatment.

[0003] However, currently most blood clots are removed by simply relying on suction. Although this method can remove a large number of blood clots, some stubborn blood clots still adhere to the blood vessel walls, making it impossible to completely remove them.

[0004] Therefore, it is necessary to invent a thrombus suction and filtration device for interventional treatment to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a thrombus suction and filtering device for interventional treatment, which solves the problem of insufficient thrombus removal ability.

[0006] The technical solution adopted by the present invention is: at least including a pusher, an outer catheter, a suction tube, an inner catheter, a connecting soft tube and a thrombus removal mechanism; the pusher is configured as an operating part, the outer catheter is arranged at the front end of the pusher, the outer catheter is configured as a hose, and there is a certain pushing distance between the outer catheter and the pusher, the suction tube is connected and arranged on the inner wall of the outer catheter, the inner catheter is connected and arranged at the front end of the outer catheter, one end of the connecting soft tube is fixed at the front end of the pusher, and the other end slides through the outer catheter and the inner catheter in turn, and the thrombus removal mechanism is arranged at the front end of the inner catheter, and is used to completely remove the thrombus from the blood vessel; Wherein, at least a negative pressure device is arranged in the suction tube for suctioning the thrombus.

[0007] Further, as a preference, the thrombus removal mechanism includes a filter cartridge, an expansion component and a scraping component; the filter cartridge is connected and arranged at the front end of the inner catheter, the filter cartridge is a cylindrical cartridge with both ends open, and a plurality of filter holes are opened on its outer wall, the expansion component is arranged at the front end of the filter cartridge, and the scraping components are arranged in a circle, all of which are arranged on the expansion component.

[0008] Further, as a preference, the expansion assembly includes a connecting tube, a connecting disk, a micromotor, a connecting rod, a micro gear, a support rod, a T-shaped guide column, an arc plate and an elastic membrane; the connecting tube is rotatably arranged in the front end of the inner conduit, and the connecting tube is located in the filter tube, the connecting disk is fixed on the outer wall of the front end of the connecting tube, and a plurality of guide grooves are opened on the connecting disk from the center of the circle to the outer circumference, the micromotor is arranged in the front end of the inner conduit, the connecting rod is fixed at the output end of the micromotor, and the connecting rod is rotatably penetrated and arranged in the connecting tube, The micro-gear 1 is fixed on the front end outer wall of the connecting rod, and the micro-gear 1 is rotatably arranged on the front side of the connecting disk. A plurality of arc-shaped through grooves are opened on the upper circumference of the micro-gear 1. The support rod is configured with a plurality of guides, which slide in the guide grooves respectively. A plurality of T-shaped guide pillars are configured, which are respectively fixed at the front end of the support rod and slidably arranged in the arc-shaped through grooves. A plurality of arc plates are configured on the circumference, and the concave centers of the plates are fixed on one end of the support rod away from each other. The elastic membrane is a deformable film, which is sealed and connected between the front end of the filter cartridge and the rear ends of the plurality of arc plates.

[0009] Further, as a preference, the scraping assembly includes a rotating pin, a second micro-gear, a rectangular block, a rotating shaft, a collar, a belt and a U-shaped scraper; the rotating pin set rotates in the front end surface of the connecting disk, the second micro-gear is fixed on the outer wall of the rotating pin, and a plurality of the second micro-gears are all meshed with the first micro-gear, the rectangular block is symmetrically arranged with two, respectively fixed on both sides of the plane end of the arc plate, the rotating shaft set is rotatably arranged between the two rectangular blocks, and a frosting sheet is arranged between the rotating shaft and the rectangular block, the collar set is rotatably arranged at the center of the rotating shaft, the belt is sleeved between the rotating pin and the collar, the U-shaped scraper is arranged in two groups, each group is circumferentially arranged with a plurality of, respectively fixed on the outer wall of the rotating shaft, and two groups of the U-shaped scrapers are arranged on both sides of the collar; Wherein, a ratchet is fixed inside the collar, and a ratchet is connected to the rotating shaft by a torsion spring.

[0010] Further, as a preference, the belt is configured as a retractable elastic belt.

[0011] Furthermore, as a preference, it also includes connecting pins and conical blocks; the connecting pins are arranged in a circle in plurality and are all fixed on the front end surface of the connecting disk, and the conical blocks are fixed on the front ends of the plurality of connecting pins.

[0012] Advantages of the present invention: In the present invention, through the coordinated use of the expansion component and the scraping component, the massive thrombus in the blood vessel can be suctioned and removed, and the thrombus adhered to the blood vessel wall can be scraped and removed, so that the thrombus in the blood vessel can be completely removed.

[0013] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the thrombus removal mechanism of the present invention; Figure 3 is a left isometric schematic diagram of the expansion assembly of the present invention; Figure 4 is a right diormometric schematic diagram of the expansion assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the scraping assembly of the present invention; Figure 6 It is an enlarged view of point A of the present invention; Figure 7 It is a schematic diagram of the conical block structure of the present invention.

[0016] Figure numerals: 1. propeller; 2. outer catheter; 3. suction tube; 4. inner catheter; 5. connecting soft tube; 6. thrombus removal mechanism; 61. filter cartridge; 62. expansion assembly; 63. scraping assembly; 621. connecting cylinder; 622. connecting disk; 6221. arc-shaped through groove; 623. micromotor; 624. connecting rod; 625. micro gear one; 626. support rod; 627. T-shaped guide column; 628. arc-shaped plate; 629. elastic membrane; 631. rotating pin; 632. micro gear two; 633. rectangular block; 634. rotating shaft; 635. belt; 636. U-shaped scraper; 81. connecting pin; 82. conical block; 637. collar. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position 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 therefore cannot be understood as a limitation on the present invention.

[0019] refer to Figures 1 to 7 , a thrombus suction and filtering device for interventional treatment, at least comprising a pusher 1, an outer catheter 2, a suction tube 3, an inner catheter 4, a connecting soft tube 5 and a thrombus removal mechanism 6; the pusher 1 is configured as an operating part, the outer catheter 2 is arranged at the front end of the pusher 1, the outer catheter 2 is configured as a hose, and there is a certain propulsion distance between the outer catheter 2 and the pusher 1, the suction tube 3 is connected and arranged on the inner wall of the outer catheter 2, the inner catheter 4 is connected and arranged at the front end of the outer catheter 2, one end of the connecting soft tube 5 is fixed at the front end of the pusher 1, and the other end slides through the outer catheter 2 and the inner catheter 4 in sequence, and the thrombus removal mechanism 6 is arranged at the front end of the inner catheter 4, and is used to completely remove the thrombus from the blood vessel; It should be noted that the function of the pusher 1 is to push the connecting tube 5 to move slightly in the blood vessel.

[0020] Wherein, at least a negative pressure device is arranged in the suction tube 3 for suctioning the thrombus.

[0021] When using, refer to Figure 1 , insert the inner catheter 4 into the blood vessel, make the thrombus removal mechanism 6 close to the thrombus site, and guide the thrombus into the external storage through the negative pressure device in the suction tube 3 to complete the thrombus removal process.

[0022] As a preferred embodiment, the thrombus removal mechanism 6 includes a filter cartridge 61, an expansion component 62 and a scraping component 63; the filter cartridge 61 is connected and arranged at the front end of the inner catheter 4, the filter cartridge 61 is a cylindrical cylinder with both ends open, and a plurality of filter holes are opened on its outer wall, the expansion component 62 is arranged at the front end of the filter cartridge 61, and the scraping components 63 are arranged in a circle, all of which are arranged on the expansion component 62.

[0023] It should be explained that the filter cartridge 61 can filter blood and retain the thrombus in the filter cartridge 61 so as to guide the thrombus into the suction tube 3.

[0024] As a preferred embodiment, the expansion component 62 includes a connecting tube 621, a connecting disk 622, a micro motor 623, a connecting rod 624, a micro gear 625, a support rod 626, a T-shaped guide column 627, an arc plate 628 and an elastic membrane 629; the connecting tube 621 is rotatably arranged in the front end of the inner catheter 4, and the connecting tube 621 is located in the filter tube 61, the connecting disk 622 is fixed on the outer wall of the front end of the connecting tube 621, and a plurality of guide grooves are opened on the connecting disk 622 from the center of the circle to the outer circumference, the micro motor 623 is arranged in the front end of the inner catheter 4, the connecting rod 624 is fixed at the output end of the micro motor 623, and the connecting rod 624 is rotatably penetrated by the connecting tube 621. In the connecting cylinder 621, the micro-gear 625 is fixed on the front end outer wall of the connecting rod 624, and the micro-gear 625 is rotatably set on the front side of the connecting disk 622. A plurality of arc-shaped through grooves 6221 are opened on the circumference of the micro-gear 625. The support rod 626 is configured with a plurality of guide pillars 627, which slide in the guide grooves respectively. A plurality of T-shaped guide pillars 627 are configured, which are respectively fixed at the front ends of the support rod 626 and slidably set in the arc-shaped through grooves 6221. A plurality of arc plates 628 are configured on the circumference, and the concave center of the arc plate 628 is fixed on one end of the support rod 626 away from each other. The elastic membrane 629 is a deformable film, which is sealed and connected between the front side end of the filter cartridge 61 and the rear side ends of the plurality of arc plates 628.

[0025] For explanation, see Figures 2 to 4 When the micro motor 623 drives the connecting rod 624 to rotate, it can drive the micro gear 1 625 to rotate. The arc groove 6221 on the micro gear 1 625 has a guiding effect on the T-shaped guide column 627, so that the micro gear 1 625 can drive the support rod 626 to move when rotating, and then the multiple arc plates 628 can synchronously deviate or gather.

[0026] Among them, a rubber ring is arranged between the connecting tube 621 and the inner tube 4, that is, when the micro motor 623 starts to drive the micro gear 1 625 to rotate, since the friction between the connecting tube 621 and the inner tube 4 is greater than the friction between the T-shaped guide column 627 and the inner wall of the arc groove 6221, the inner tube 4 and the connecting disk 622 remain stationary, thereby preventing the multiple arc plates 628 from rotating synchronously with the micro gear 1 625 when not expanded.

[0027] Specifically, see Figure 4Initially, the multiple arc plates 628 are in a gathered state. When the multiple arc plates 628 are close to the thrombus, the micromotor 623 is started, and the micromotor 623 drives the connecting rod 624 to rotate counterclockwise, and the multiple arc plates 628 expand synchronously. When the T-shaped guide column 627 moves from one end to the other end of the arc groove 6221, the micromotor 623 stops driving. At this time, the multiple arc plates 628 are in close contact with the blood vessel wall, and then the negative pressure device in the suction tube 3 is started to start suctioning the thrombus. In the above, the elastic membrane 629 will expand simultaneously with the multiple arc plates 628, so that the elastic membrane 629 can block the gap between the multiple arc plates 628 and the filter cartridge 61, thereby preventing the thrombus from escaping from the gap between the arc plates 628 and the filter cartridge 61, so that the sucked thrombus completely enters the filter cartridge 61 and is finally introduced into the suction tube 3, thereby completing the suction of the thrombus, that is, the first step of removing the thrombus.

[0028] As a preferred embodiment, the scraping assembly 63 includes a rotating pin 631, a micro gear 2 632, a rectangular block 633, a rotating shaft 634, a collar 637, a belt 635 and a U-shaped scraper 636; the rotating pin 631 is set and rotated in the front end surface of the connecting disk 622, the micro gear 2 632 is fixed on the outer wall of the rotating pin 631, and a plurality of the micro gears 2 632 are all engaged with the micro gear 1 625, the rectangular block 633 is symmetrically arranged with two, respectively fixed on both sides of the plane end of the arc plate 628, the rotating shaft 634 is set The rotating pin 631 is provided between the two rectangular blocks 633, and a frosting sheet is provided between the rotating shaft 634 and the rectangular block 633 to ensure that there is a certain friction between the rotating shaft 634 and the rectangular block 633. The sleeve 637 is provided in a sleeve and rotated manner at the center of the rotating shaft 634. The belt 635 is provided between the rotating pin 631 and the sleeve 637. The U-shaped scraper 636 is provided in two groups, each group is provided with a plurality of scrapers on the circumference, and is respectively fixed on the outer wall of the rotating shaft 634. In addition, the two groups of U-shaped scrapers 636 are provided on both sides of the sleeve 637. Among them, a ratchet is fixed in the ring 637, and a pawl is connected to the rotating shaft 634 by a torsion spring. That is to say, when the micro-gear 1 625 rotates counterclockwise, the belt 635 will drive the ratchet to rotate clockwise. At this time, the ratchet and the pawl are in a non-meshing state, and the friction between the rotating shaft 634 and the rectangular block 633 is greater than the elastic force of the torsion spring. Therefore, when the ratchet rotates clockwise, the ring 637 will be driven to slip on the rotating shaft 634, that is, during the counterclockwise rotation of the micro-gear 1 625, the U-shaped scraper 636 will rotate synchronously with the arc plate 628; when the micro-gear 1 625 rotates clockwise, the belt 635 will drive the ratchet to rotate counterclockwise. At this time, the ratchet and the pawl are meshed, so that the ring 637 and the rotating shaft 634 will rotate synchronously, that is, when the micro-gear 1 625 rotates clockwise, the U-shaped scraper 636 will rotate counterclockwise.

[0029] In summary, when the T-shaped guide post 627 moves from one end to the other end of the arc-shaped slot 6221, the end of the arc-shaped slot 6221 will have a limiting effect on the T-shaped guide post 627, so that when the micro-motor 623 drives the micro-gear 1 625 to continue to rotate counterclockwise, the force of the T-shaped guide post 627 on the end of the arc-shaped slot 6221 is greater than the friction between the inner catheter 4 and the connecting tube 621, so the T-shaped guide post 627 will rotate synchronously with the micro-gear 1 625, thereby driving the arc-shaped plate 628 and the connecting disk 622 to rotate synchronously. Therefore, when the multiple arc-shaped plates 628 rotate counterclockwise, they can drive the U-shaped scraper 636 to rotate synchronously, so that the U-shaped scraper 636 will scrape the residual thrombus adhering to the inner wall of the blood vessel. When the blood vessel is completed, After scraping one circle of the wall, the remaining thrombus will gather on the U-shaped scraper 636; thereafter, the micromotor 623 drives the connecting rod 624 to rotate clockwise, and the connecting rod 624 will drive the micro-gear 1 625 to rotate clockwise, so that the end limiting effect of the arc-shaped through groove 6221 on the T-shaped guide column 627 is released, and the multiple arc-shaped plates 628 shrink synchronously. During this process, the micro-gear 1 625 can drive the multiple micro-gears 2 632 to rotate counterclockwise through engagement. Under the transmission action of the belt 635, the rotating shaft 634 drives the U-shaped scraper 636 to rotate counterclockwise. Therefore, the remaining thrombus gathered on the U-shaped scraper 636 will be thrown into the inner side of the arc-shaped plate 628, and the residual thrombus will be sucked through the negative pressure device in the suction tube 3, that is, the second step of removing the thrombus.

[0030] As a preferred embodiment, the belt 635 is configured as a retractable elastic belt. That is, when the plurality of arc-shaped plates 628 are gathered together, the belt 635 can still be contracted to perform belt transmission between the rotating shaft 634 and the rotating pin 631.

[0031] As a preferred embodiment, it also includes a connecting pin 81 and a conical block 82; the connecting pin 81 is arranged in plurality on the circumference and is fixed on the front end surface of the connecting disk 622, and the conical block 82 is fixed on the front ends of the plurality of connecting pins 81.

[0032] That is to say, when the thrombus in the blood vessel is sucked out, the thrombus will adhere to and be blocked by the conical block 82, and the thrombus attached to the conical block 82 will enter the filter cartridge 61 from the edge of the conical block 82 under the action of negative pressure, thereby preventing the thrombus from adhering to the connecting plate 622.

[0033] Specifically, during implementation, the inner catheter 4 is first inserted into the blood vessel to make the thrombus removal mechanism 6 close to the thrombus site, and the micromotor 623 is started. The micromotor 623 drives the connecting rod 624 to rotate counterclockwise, and the multiple arc plates 628 will expand synchronously. When the T-shaped guide column 627 moves from one end to the other end of the arc-shaped through groove 6221, the micromotor 623 stops driving to suck the thrombus, that is, the first step of removing the thrombus; the micromotor 623 is started again, and the micromotor 623 continues to drive the connecting rod 624 to rotate counterclockwise. Since the end of the arc-shaped through groove 6221 has a limiting effect on the T-shaped guide column 627, the T-shaped guide column 627 will rotate synchronously with the micro-gear 625, and then drive the arc plate 628 and the connecting disk 622 to rotate synchronously. Therefore, when the multiple arc plates 628 rotate counterclockwise, they can drive the U-shaped scraper 636 to rotate synchronously, so that the U-shaped The scraper 636 will scrape the remaining thrombus adhered to the inner wall of the blood vessel. After completing a week of scraping the blood vessel wall, the remaining thrombus will gather on the U-shaped scraper 636. Thereafter, the micromotor 623 drives the connecting rod 624 to rotate clockwise, and the end limiting effect of the arc groove 6221 on the T-shaped guide column 627 is released. The multiple arc plates 628 shrink synchronously, and the micro gear 1 625 can drive the multiple micro gears 2 632 to rotate counterclockwise through engagement. Under the transmission action of the belt 635, the rotating shaft 634 drives the U-shaped scraper 636 to rotate counterclockwise. Therefore, the remaining thrombus scraped on the U-shaped scraper 636 will be thrown into the inner side of the arc plate 628, and the residual thrombus will be sucked through the negative pressure device in the suction tube 3, that is, the second step of removing the thrombus. At this point, the thrombus in the blood vessel is completely removed, and the inner catheter 4 is pulled to withdraw the thrombus removal mechanism 6 from the blood vessel.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A thrombus suction and filtration device for interventional treatment, characterized in that: The device comprises at least a propeller (1), an outer catheter (2), a suction tube (3), an inner catheter (4), a connecting tube (5) and a thrombus removal mechanism (6); the propeller (1) is configured as an operating unit, the outer catheter (2) is arranged at the front end of the propeller (1), the outer catheter (2) is configured as a hose, and a certain propulsion distance is provided between the outer catheter (2) and the propeller (1); the suction tube (3) is arranged on the inner wall of the outer catheter (2) in communication, the inner catheter (4) is arranged at the front end of the outer catheter (2) in communication, one end of the connecting tube (5) is fixed at the front end of the propeller (1), and the other end slides through the outer catheter (2) and the inner catheter (4) in sequence; the thrombus removal mechanism (6) is arranged at the front end of the inner catheter (4) and is used to completely remove the thrombus from the blood vessel; Wherein, at least a negative pressure device is provided in the suction tube (3) for suctioning the thrombus.

2. The thrombus aspiration and filtration device for interventional treatment according to claim 1, characterized in that: The thrombus removal mechanism (6) comprises a filter cartridge (61), an expansion component (62) and a scraping component (63); the filter cartridge (61) is arranged in communication with the front end of the inner catheter (4); the filter cartridge (61) is a cylindrical cartridge with both ends open, and a plurality of filter holes are provided on its outer wall; the expansion component (62) is arranged at the front end of the filter cartridge (61); and a plurality of scraping components (63) are arranged circumferentially and are all arranged on the expansion component (62).

3. The thrombus aspiration and filtration device for interventional treatment according to claim 2, characterized in that: The expansion assembly (62) comprises a connecting tube (621), a connecting disk (622), a micro motor (623), a connecting rod (624), a micro gear (625), a supporting rod (626), a T-shaped guide column (627), an arc plate (628) and an elastic membrane (629); the connecting tube (621) is rotatably arranged in the front end of the inner tube (4), and the connecting tube (621) is located in the filter tube (61); the connecting disk (622) is fixed on the outer wall of the front end of the connecting tube (621); a plurality of guide grooves are formed on the connecting disk (622) from the center of the circle to the outer circumference; the micro motor (623) is arranged in the front end of the inner tube (4); the connecting rod (624) is fixed at the output end of the micro motor (623), and the connecting rod (624) is rotatably penetrated by the connecting disk (622) arranged in the front end of the inner tube (4); In the connecting cylinder (621), the micro gear 1 (625) is fixed on the front end outer wall of the connecting rod (624), and the micro gear 1 (625) is rotatably arranged on the front side of the connecting disk (622). A plurality of arc-shaped through grooves (6221) are opened on the circumference of the micro gear 1 (625). The support rod (626) is provided with a plurality of guide pins (627) that slide in the guide grooves respectively. A plurality of T-shaped guide pins (627) are provided that are respectively fixed at the front end of the support rod (626) and slidably arranged in the arc-shaped through grooves (6221). A plurality of arc-shaped plates (628) are provided on the circumference, and the concave centers of the plates are fixed on one end of the support rod (626) that is away from each other. The elastic membrane (629) is a deformable film that is sealingly connected between the front end of the filter cylinder (61) and the rear ends of the plurality of arc-shaped plates (628).

4. The thrombus aspiration and filtration device for interventional treatment according to claim 3, characterized in that: The scraping assembly (63) comprises a rotating pin (631), a second micro gear (632), a rectangular block (633), a rotating shaft (634), a collar (637), a belt (635) and a U-shaped scraper (636); the rotating pin (631) is sleeved and rotated within the front end surface of the connecting plate (622); the second micro gear (632) is fixed on the outer wall of the rotating pin (631); and a plurality of second micro gears (632) are all meshed with the first micro gear (625); two rectangular blocks (633) are symmetrically arranged and are respectively fixed on a plane of the arc plate (628). On both sides of the ends, the rotating shaft (634) is rotatably mounted between the two rectangular blocks (633), and a frosting sheet is disposed between the rotating shaft (634) and the rectangular block (633). The sleeve (637) is rotatably mounted at the center of the rotating shaft (634). The belt (635) is mounted between the rotating pin (631) and the sleeve (637). Two groups of U-shaped scrapers (636) are configured, and each group is circumferentially configured with a plurality of scrapers, which are respectively fixed on the outer wall of the rotating shaft (634). Furthermore, the two groups of U-shaped scrapers (636) are disposed on both sides of the sleeve (637). A ratchet is fixed inside the collar (637), and a ratchet is connected to the rotating shaft (634) using a torsion spring.

5. The thrombus aspiration and filtration device for interventional treatment according to claim 4, characterized in that: The belt (635) is configured as a stretchable elastic belt.

6. The thrombus aspiration and filtering device for interventional treatment according to claim 3, characterized in that: It also includes a connecting pin (81) and a conical block (82); a plurality of the connecting pins (81) are arranged around the circumference and are all fixed on the front end surface of the connecting disk (622); and the conical block (82) is fixed on the front ends of the plurality of connecting pins (81).

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