Lower limb arterial thrombus aspiration device

Abstract

The invention discloses a lower limb arterial thrombus aspiration device, and belongs to the technical field of medical instruments, the lower limb arterial thrombus aspiration device comprises a catheter assembly, a far-end execution assembly, a thrombus aspiration assembly and a control handle, the catheter assembly is formed by sleeving a guide wire, a transmission catheter and a protective sheath tube in a layered manner, and an expansion net is arranged at the front end of the transmission catheter; the far-end execution assembly comprises a suction pipe and a linkage cutting pipe, the front end of the suction pipe is provided with a conical tip and symmetrical suction holes, and a spiral tool bit at the front end of the linkage cutting pipe is contained in the conical tip. According to the thrombus suction assembly, multi-channel cooperation is achieved through a three-way pipe, a power transmission structure in a control handle drives a linkage cutting pipe to rotate at a constant speed, thrombus grabbing, cutting and suction integrated cooperative operation is achieved, the removing efficiency of various thrombus is improved, thrombus fragment escape is avoided, and the blood vessel scratching and complication risks are reduced.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically referring to a device for aspirating arterial thrombi in the lower extremities. Background Technology

[0002] Lower extremity arterial thrombosis is a common peripheral vascular disease in clinical practice, mostly caused by vascular injury, hypercoagulable state, or blood stasis. After a thrombus blocks a blood vessel, it leads to ischemia and hypoxia in the lower extremity tissues, and in severe cases, can cause limb necrosis or even endanger life. Mainstream clinical treatments include thrombolysis, vascular bypass grafting, and interventional thrombectomy. The latter is the preferred choice due to its minimally invasive nature and rapid recovery. The thrombectomy device, as the core instrument, directly determines the clearance efficiency and postoperative vascular patency rate.

[0003] Existing devices are mostly simple negative pressure suction or rotary cutting and suction structures, which have obvious shortcomings: simple negative pressure is not effective in removing old, calcified and large thrombi, and is prone to residue, blockage, and negative pressure leakage. Moreover, thrombus fragments can easily escape and cause distal embolism. Combined devices have weak synergy between cutting and suction, and the exposed blade can easily scratch blood vessels. They are not suitable for small blood vessels in the distal lower extremities and lesions below the knee. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a lower extremity arterial thrombosis aspiration device, which effectively solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a lower extremity arterial thrombus aspiration device, including a catheter assembly, a distal execution assembly, a thrombus aspiration assembly and a control handle. The distal execution assembly is disposed on the catheter assembly, the thrombus aspiration assembly is disposed at the tail of the distal execution assembly, the catheter assembly passes through the thrombus aspiration assembly, and the tail of the catheter assembly is disposed on the control handle.

[0006] Furthermore, the catheter assembly includes a guidewire, a transmission catheter, and a protective sheath. The transmission catheter is sleeved on the outside of the guidewire, the protective sheath is sleeved on the outside of the transmission catheter, and an expansion mesh is provided at the front end of the transmission catheter.

[0007] Preferably, the guidewire provides a stable path for the advancement of subsequent components. The transmission catheter, fitted outside the guidewire and adapted to the layered structure of the protective sheath, enables precise power transmission, driving the front expansion mesh and the linkage cutting tube to complete coordinated actions. The protective sheath, as the outer protective structure, can isolate the transmission catheter from the inner wall of the blood vessel.

[0008] Furthermore, the remote execution component includes a suction tube and a linkage cutting tube. The linkage cutting tube is disposed inside the suction tube and is sleeved on the outside of the protective sheath. The suction tube has a tapered tip at its front end, and a guide hole is provided at the front end of the tapered tip. The conduit assembly passes through the guide hole. Suction holes are symmetrically provided on both sides of the tapered tip. The linkage cutting tube has a helical cutter head at its front end, and the helical cutter head rotates inside the tapered tip.

[0009] Preferably, the tapered tip design conforms to the anatomical characteristics of the lower limb arteries, allowing for smooth puncture to the thrombus site and reducing mechanical damage to the vessel wall; the symmetrically arranged suction holes on both sides expand the negative pressure suction range, achieving all-round capture of the thrombus, avoiding local thrombus infiltration, and improving the thoroughness of thrombus removal; the linkage cutting tube is sleeved on the outside of the protective sheath and has an embedded structure that adapts to the suction tube, allowing for synchronous linkage with the suction action, realizing integrated cutting and suction; the front spiral blade can rotate at high speed, cutting blocky and stubborn thrombi into small fragments, solving the problem that large thrombi are difficult to be suctioned by negative pressure and are prone to clogging the lumen, greatly improving suction efficiency; the blade is housed inside the tapered tip, avoiding direct contact with the inner wall of the vessel during rotation, reducing the risk of vascular abrasion, and adapting to the treatment scenario of fragile lower limb arteries.

[0010] Furthermore, the thrombus aspiration assembly includes a three-way tube, a negative pressure tube, and an aspiration device. The three-way tube is located at the tail end of the aspiration tube, and a thrombus discharge tube is provided on the side wall of the three-way tube. One end of the negative pressure tube is connected to the thrombus discharge tube, and the other end of the negative pressure tube is connected to the aspiration device.

[0011] Furthermore, one end of the three-way tube is provided with a locking tube, the other end of the three-way tube is provided with an elastic through hole pad, the three-way tube is also provided with a locking ring, the suction tube is provided on the locking tube and fixed by the locking ring, and the conduit assembly passes through the center of the elastic through hole pad.

[0012] As a preferred option, the three-way tube integrated multi-path design takes into account the fixation of the aspiration tube, the penetration of the catheter assembly, and the removal of thrombus fragments, simplifying the overall structure of the device and reducing the complexity of intraoperative tubing connections.

[0013] Furthermore, the control handle is provided with a sleeve, a grip, and a start button. The sleeve is located on the top of the grip, the start button is located on the side wall of the grip, and the conduit assembly passes through the sleeve.

[0014] Furthermore, the sleeve has a rotating shaft cavity inside, which is connected to the inside of the grip. The rear end of the rotating shaft cavity of the sleeve has a rotating shaft fixing tube, the front end of the rotating shaft cavity has a shrink ring, the side wall of the rotating shaft cavity has a locking groove that penetrates the outside, and the inside of the grip has a gear column.

[0015] Furthermore, the control handle is internally provided with a snap ring, a drive shaft, a connecting gear, and a motor. The snap ring is located on the drive shaft, the drive shaft is located on the shaft fixing tube, the connecting gear is located on the gear column, and the motor is located inside the grip.

[0016] Furthermore, the drive shaft is provided with a clamping plate and a ring gear. The ring gear is located at the tail of the clamping plate, and a return spring is provided on the rear side of the ring gear. The end of the return spring is attached to the inner wall of the shaft cavity. An inner contact is provided on the inner wall of the front end of the clamping plate, and an outer inclined boss is provided on the outer wall of the front end of the clamping plate. The outer inclined boss is located at the contraction ring.

[0017] Furthermore, the buckle ring is sleeved on the outside of the clamping plate, and a locking post is provided on the outer wall of the buckle ring. The locking post is located in the locking groove. The motor is provided with a motor gear, which meshes with a connecting gear, and the connecting gear meshes with a ring gear.

[0018] Preferably, the motor provides stable power, which is transmitted through the linkage of motor gears, connecting gears, and ring gears, resulting in low power loss. This allows the linkage cutting tube to rotate at a uniform speed, ensuring a uniform cutting effect. The clamping plate on the drive shaft is tightened by the outer inclined boss fitting into the shrinking ring. The inner contact enhances the clamping stability of the linkage cutting tube, preventing slippage during rotation. The return spring enables quick unlocking of the clamping plate, accommodating rapid adjustments during surgery. The buckle ring and locking post work together to lock the clamping state, ensuring operational stability during surgery and preventing accidental unlocking.

[0019] The beneficial effects achieved by the present invention using the above structure are as follows: 1. Highly efficient and thorough thrombus removal: Adopting an integrated design of grasping, cutting and suction, the expansion mesh at the front end of the transmission catheter can accurately pull the thrombus to the suction port, and the spiral cutter head of the linkage cutting tube cuts the blocky thrombus into small fragments. With the stable negative pressure conduction of the negative pressure suction component, the thrombus escape or lumen blockage is prevented, which greatly improves the efficiency and thoroughness of thrombus removal and is suitable for thrombus lesions of different sizes and hardness.

[0020] 2. Excellent vascular protection performance: Each component is layered and conforms to the anatomical characteristics of the lower limb arteries. The guidewire, tapered tip and other components have both flexibility and guidance, which can reduce friction and mechanical damage to the inner wall of the blood vessels. The spiral cutter head is housed inside the tapered tip, avoiding direct contact with the blood vessels during rotation. The sheath protects the internal transmission components from the blood vessels, effectively reducing the risk of complications such as vascular spasm, intimal tear, and perforation, making it suitable for vulnerable lower limb artery scenarios.

[0021] 3. Convenient and precise operation: The control handle is ergonomically designed, making it easy for medical staff to hold and operate for extended periods of time; the start button can precisely adjust the blade speed, and the locking ring and clamping plate work together to quickly fix and unlock the linkage cutting tube. The power transmission is stable without significant deviation, reducing the difficulty of operation and adapting to the needs of precise control during surgery.

[0022] 4. Strong adaptability and compatibility: The expansion net can expand elastically according to the size of the blood vessel lumen, the suction device can adapt to different negative pressure intensities, and the whole can adapt to the lower limb arteries with different anatomical structures, taking into account the treatment needs of various types of thrombosis; the components are firmly connected, and the advancement depth and operation rhythm can be flexibly adjusted to adapt to complex clinical scenarios. Attached Figure Description

[0023] Figure 1 This is a perspective view of a lower limb arterial thrombus aspiration device proposed in this invention; Figure 2 This is a schematic diagram of the distal part of a lower limb arterial thrombus aspiration device proposed in this invention; Figure 3 for Figure 2 A cross-sectional view along section line AA; Figure 4 This is a schematic diagram of the control handle of a lower limb arterial thrombosis aspiration device proposed in this invention; Figure 5 for Figure 4 A cross-sectional view along the cutting line BB; Figure 6 for Figure 5 A cross-sectional view along the section line CC; Figure 7 This is a cross-sectional schematic diagram of the three-way valve of the lower limb arterial thrombosis aspiration device proposed in this invention; Figure 8 This is a schematic diagram of the drive shaft of a lower limb arterial thrombosis aspiration device proposed in this invention.

[0024] Among them, 1. Catheter assembly, 11. Guide wire, 12. Transmission catheter, 121. Expandable mesh, 13. Protective sheath, 2. Distal actuator assembly, 21. Suction tube, 211. Conical tip, 2111. Guide hole, 212. Suction hole, 22. Linkage cutting tube, 221. Spiral cutter head, 3. Thrombus aspiration assembly, 31. Three-way valve, 311. Thrombus removal tube, 312. Locking tube, 313. Elastic through-hole pad, 314. Locking ring, 32. Negative pressure tube, 33. Suction. Device, 4. Control handle, 41. Sleeve, 411. Shaft cavity, 412. Shaft fixing tube, 413. Contraction ring, 414. Locking groove, 42. Grip, 421. Gear post, 43. Start button, 44. Snap ring, 441. Locking post, 45. Drive shaft, 451. Clamping plate, 4511. Inner contact, 4512. Outer inclined boss, 452. Ring gear, 453. Return spring, 46. Connecting gear, 47. Motor, 471. Motor gear.

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] like Figures 1-8 As shown, the present invention proposes a lower extremity arterial thrombus aspiration device, including a catheter assembly 1, a distal execution assembly 2, a thrombus aspiration assembly 3, and a control handle 4. The distal execution assembly 2 is disposed on the catheter assembly 1, the thrombus aspiration assembly 3 is disposed at the tail of the distal execution assembly 2, the catheter assembly 1 passes through the thrombus aspiration assembly 3, and the tail of the catheter assembly 1 is disposed on the control handle 4.

[0029] The catheter assembly 1 includes a guidewire 11, a transmission catheter 12, and a protective sheath 13. The transmission catheter 12 is sleeved on the outside of the guidewire 11, and the protective sheath 13 is sleeved on the outside of the transmission catheter 12. An expansion mesh 121 is provided at the front end of the transmission catheter 12.

[0030] The remote execution component 2 includes a suction tube 21 and a linkage cutting tube 22. The linkage cutting tube 22 is located inside the suction tube 21 and is sleeved on the outside of the protective sheath tube 13. The front end of the suction tube 21 is provided with a tapered tip 211. The front end of the tapered tip 211 is provided with a guide hole 2111. The guide tube assembly 1 passes through the guide hole 2111. Suction holes 212 are symmetrically provided on both sides of the tapered tip 211. The front end of the linkage cutting tube 22 is provided with a spiral cutter head 221, which rotates inside the tapered tip 211.

[0031] The thrombus aspiration assembly 3 includes a three-way tube 31, a negative pressure tube 32, and an aspiration device 33. The three-way tube 31 is located at the tail of the aspiration tube 21. A thrombus discharge tube 311 is provided on the side wall of the three-way tube 31. One end of the negative pressure tube 32 is connected to the thrombus discharge tube 311, and the other end of the negative pressure tube 32 is connected to the aspiration device 33.

[0032] One end of the three-way tube 31 is provided with a locking tube 312, and the other end of the three-way tube 31 is provided with an elastic through hole pad 313. The three-way tube 31 is also provided with a locking ring 314. The suction tube 21 is provided on the locking tube 312 and fixed by the locking ring 314. The conduit assembly 1 passes through the center of the elastic through hole pad 313.

[0033] The control handle 4 is provided with a sleeve 41, a grip 42 and a start button 43. The sleeve 41 is located on the top of the grip 42, the start button 43 is located on the side wall of the grip 42, and the conduit assembly 1 passes through the sleeve 41.

[0034] The sleeve 41 has a rotating shaft cavity 411 inside, which is connected to the inside of the handle 42. The rear end of the sleeve rotating shaft cavity 411 has a rotating shaft fixing tube 412, the front end of the rotating shaft cavity 411 has a shrink ring 413, the side wall of the rotating shaft cavity 411 has a locking groove 414 that penetrates the outside, and the handle 42 has a gear column 421 inside.

[0035] The control handle 4 is equipped with a snap ring 44, a drive shaft 45, a connecting gear 46 and a motor 47. The snap ring 44 is located on the drive shaft 45, the drive shaft 45 is located on the shaft fixing tube 412, the connecting gear 46 is located on the gear column 421, and the motor 47 is located inside the handle 42.

[0036] The drive shaft 45 is provided with a clamping plate 451 and a ring gear 452. The ring gear 452 is located at the tail of the clamping plate 451. A return spring 453 is provided on the rear side of the ring gear 452. The end of the return spring 453 is attached to the inner wall of the shaft cavity 411. An inner contact 4511 is provided on the inner wall of the front end of the clamping plate 451. An outer inclined boss 4512 is provided on the outer wall of the front end of the clamping plate 451. The outer inclined boss 4512 is located at the shrink ring 413.

[0037] The buckle ring 44 is sleeved on the outside of the clamping plate 451. The outer wall of the buckle ring 44 is provided with a locking post 441. The locking post 441 is located in the locking groove 414. The motor 47 is provided with a motor gear 471. The motor gear 471 is meshed with the connecting gear 46. The connecting gear 46 is meshed with the ring gear 452.

[0038] In practical use, the puncture needle is inserted into the target lower limb artery along the positioning point. After confirming that arterial blood is aspirated from the puncture needle, the guide wire 11 is slowly inserted into the lumen of the puncture needle. Under image guidance, the guide wire 11 is advanced until the tip of the guide wire passes the distal end of the thrombus lesion site, ensuring that the guide wire 11 travels smoothly without the risk of bending or vascular perforation.

[0039] Insert the transmission catheter 12 along the outside of the guidewire 11, and then put the protective sheath 13 on the outside of the transmission catheter 12 to form a complete catheter assembly 1. Hold the handle 42 of the control handle 4 and slowly advance the catheter assembly 1 along the guidewire 11, and simultaneously introduce the distal execution component 2 and the thrombus aspiration component 3.

[0040] Under image guidance, adjust the advancement depth until the conical tip 211 of the distal execution component 2 reaches the proximal edge of the thrombus, ensuring that the suction holes 212 on both sides of the conical tip 211 are completely aligned with the thrombus body, and the guide hole 2111 fits against the inner wall of the blood vessel without deviation. Advance the transmission catheter 12 forward so that the expansion net 121 is separated from the protective sheath 13, and the expansion net 121 expands under its own elastic force.

[0041] Pushing the latching ring 44 of the control handle 4 causes the locking pin 441 to slide forward along the locking groove 414, which in turn causes the outer inclined boss 4512 at the front end of the clamping plate 451 to fit against the shrinking ring 413. The inclined surface squeezes the clamping plate 451 to tighten it, and the inner contact 4511 tightly clamps the linkage cutting tube 22. The motor 47 inside the control handle 4 is started, and the motor gear 471 drives the connecting gear 46 to rotate, which in turn drives the ring gear 452 to rotate synchronously with the drive shaft 45. The linkage cutting tube 22 rotates at a constant speed with the drive shaft 45, and the spiral cutter head 221 at its front end rotates at high speed inside the conical tip 211. The aspiration device 33 transmits negative pressure to the inner cavity of the three-way tube 31 through the negative pressure tube 32. At this time, the negative pressure is conducted to the aspiration hole 212 through the aspiration tube 21, forming a stable suction force. The catheter assembly 1 is slowly pulled, and the expansion net 121 pulls the thrombus to the aspiration hole 212, and then it is sucked into the aspiration tube 21. The high-speed rotating spiral cutter head 221 cuts the thrombus into fragments. Under the action of negative pressure, the cut thrombus fragments enter the collection chamber of the aspiration device 33 through the inner cavity of the aspiration tube 21, the thrombus discharge tube 311 of the three-way tube 31, and the negative pressure tube 32. During the operation, the amount of thrombus in the collection chamber can be observed to judge the aspiration effect.

[0042] After thrombus removal, first turn off motor 47 and aspiration device 33, loosen locking ring 314 and buckle ring 44 to release the fixation of catheter assembly 1 and aspiration tube 21. Slowly withdraw distal execution assembly 2, thrombus aspiration assembly 3 and catheter assembly 1 along guidewire 11, leaving guidewire 11 in place for now, and observe for any active bleeding at the puncture site. Withdraw guidewire 11, apply pressure to the puncture site to stop bleeding, and after confirming no bleeding, cover with sterile gauze and apply pressure bandage. Disassemble all components, autoclave reusable parts, and dispose of disposable parts as medical waste. Thrombus samples in the collection chamber of aspiration device 33 can be retained for testing.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0045] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for aspirating arterial thrombi in the lower extremities, characterized in that: It includes a catheter assembly (1), a distal execution assembly (2), a thrombus aspiration assembly (3), and a control handle (4). The distal execution assembly (2) is located on the catheter assembly (1), the thrombus aspiration assembly (3) is located at the tail of the distal execution assembly (2), the catheter assembly (1) passes through the thrombus aspiration assembly (3), and the tail of the catheter assembly (1) is located on the control handle (4).

2. The lower extremity arterial thrombus aspiration device according to claim 1, characterized in that: The catheter assembly (1) includes a guidewire (11), a transmission catheter (12) and a protective sheath (13). The transmission catheter (12) is sleeved on the outside of the guidewire (11), and the protective sheath (13) is sleeved on the outside of the transmission catheter (12). An expansion mesh (121) is provided at the front end of the transmission catheter (12).

3. The lower extremity arterial thrombus aspiration device according to claim 2, characterized in that: The remote execution component (2) includes a suction tube (21) and a linkage cutting tube (22). The linkage cutting tube (22) is located inside the suction tube (21) and is sleeved on the outside of the protective sheath (13). The suction tube (21) has a tapered tip (211) at the front end and a guide hole (2111) at the front end of the tapered tip (211). The conduit assembly (1) passes through the guide hole (2111). Suction holes (212) are symmetrically provided on both sides of the tapered tip (211). The linkage cutting tube (22) has a spiral cutter head (221) at the front end and the spiral cutter head (221) rotates inside the tapered tip (211).

4. The lower extremity arterial thrombus aspiration device according to claim 3, characterized in that: The thrombus aspiration assembly (3) includes a three-way tube (31), a negative pressure tube (32), and an aspiration device (33). The three-way tube (31) is located at the tail of the aspiration tube (21). A thrombus discharge tube (311) is provided on the side wall of the three-way tube (31). One end of the negative pressure tube (32) is connected to the thrombus discharge tube (311), and the other end of the negative pressure tube (32) is connected to the aspiration device (33).

5. The lower extremity arterial thrombus aspiration device according to claim 4, characterized in that: One end of the three-way tube (31) is provided with a locking tube (312), and the other end of the three-way tube (31) is provided with an elastic through hole pad (313). The three-way tube (31) is also provided with a locking ring (314). The suction tube (21) is located on the locking tube (312) and fixed by the locking ring (314). The conduit assembly (1) passes through the center of the elastic through hole pad (313).

6. The lower extremity arterial thrombus aspiration device according to claim 5, characterized in that: The control handle (4) is provided with a sleeve (41), a grip (42) and a start button (43). The sleeve (41) is located on the top of the grip (42), and the start button (43) is located on the side wall of the grip (42). The conduit assembly (1) passes through the sleeve (41).

7. The lower extremity arterial thrombus aspiration device according to claim 6, characterized in that: The sleeve (41) has a rotating shaft cavity (411) inside, which is connected to the inside of the handle (42). The rear end of the sleeve rotating shaft cavity (411) is provided with a rotating shaft fixing tube (412), the front end of the rotating shaft cavity (411) is provided with a shrink ring (413), the side wall of the rotating shaft cavity (411) is provided with a locking groove (414) that penetrates the outside, and the handle (42) is provided with a gear column (421).

8. The lower extremity arterial thrombus aspiration device according to claim 7, characterized in that: The control handle (4) is provided with a buckle ring (44), a drive shaft (45), a connecting gear (46) and a motor (47). The buckle ring (44) is located on the drive shaft (45), the drive shaft (45) is located on the shaft fixing tube (412), the connecting gear (46) is located on the gear column (421), and the motor (47) is located inside the grip (42).

9. A lower extremity arterial thrombus aspiration device according to claim 8, characterized in that: The drive shaft (45) is provided with a clamping plate (451) and a ring gear (452). The ring gear (452) is located at the tail of the clamping plate (451). A return spring (453) is provided on the rear side of the ring gear (452). The end of the return spring (453) is attached to the inner wall of the shaft cavity (411). An inner contact (4511) is provided on the inner wall of the front end of the clamping plate (451). An outer inclined boss (4512) is provided on the outer wall of the front end of the clamping plate (451). The outer inclined boss (4512) is located at the shrink ring (413).

10. A lower extremity arterial thrombus aspiration device according to claim 9, characterized in that: The buckle ring (44) is sleeved on the outside of the clamping plate (451). The outer wall of the buckle ring (44) is provided with a locking post (441). The locking post (441) is located in the locking groove (414). The motor (47) is provided with a motor gear (471). The motor gear (471) is meshed with the connecting gear (46). The connecting gear (46) is meshed with the ring gear (452).

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