Thrombus aspiration device

Abstract

The application discloses a thrombus suction device, which comprises a suction assembly, the suction assembly comprises a shell with a pressure cavity, a piston rod reciprocally slidingly arranged at one end of the pressure cavity, a liquid inlet pipe and a liquid outlet pipe respectively communicating with the pressure cavity, and the thrombus suction device further comprises a manual driving device and an electric driving device respectively cooperable or connectable with the piston rod to drive the piston rod to slide relative to the shell, the thrombus suction device has a manual suction mode and an electric suction mode, in the electric suction mode, the cooperation or connection of the manual driving device with the piston rod is located at a first position of the piston rod, and the electric driving device cooperates or connects with the piston rod, in the manual suction mode, the cooperation or connection of the manual driving device with the piston rod is located at a second position of the piston rod, and the cooperation or connection of the electric driving device with the piston rod is disconnected. The thrombus suction device can realize the manual and electric double suction modes simultaneously in one shell, and the switching between the manual and electric suction modes is convenient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a thrombus aspiration device. Background Technology

[0002] Deep vein thrombosis (DVT) and arterial thromboembolism (ATE) are common peripheral vascular thrombotic occlusive diseases. With societal development and lifestyle changes, their incidence is increasing year by year across all age groups. DVT and its resulting pulmonary embolism (PE) are the third leading vascular disease after acute coronary syndrome and ischemic stroke, with an annual incidence of up to 0.1%, posing a significant burden on society. Arterial thromboembolic diseases are a group of diseases characterized by the formation of thrombi within arteries, causing blockage of the arterial lumen, leading to ischemia and hypoxia in related organs and tissues, resulting in organ necrosis in severe cases. They have a rapid onset and progression. Current treatments for peripheral vascular thrombotic occlusive diseases include conventional anticoagulation, systemic thrombolysis, and surgical thrombectomy, but interventional thrombectomy is the most clinically favored and has seen rapid development in recent decades. Compared with traditional treatment methods, interventional thrombectomy has the following advantages: ① Short operation time and rapid efficacy, requiring only one catheter procedure to quickly remove or reduce the thrombus volume; ② Less thrombolytic drug dosage, reducing the patient's bleeding risk; ③ No need for several days of close monitoring after the procedure, and no need for repeated laboratory tests to assess the effectiveness of fibrinolysis; ④ Fewer complications. Percutaneous aspiration thrombectomy (PAT) is a favorable technique for interventional thrombectomy due to its rapid recanalization and good imaging and clinical outcomes. It is a fast and economical technique often used as an adjunct to pharmacological thrombolysis to increase the thrombolytic effect, reduce the dosage of thrombolytic drugs, and lower the bleeding risk.

[0003] Thrombus aspiration devices are key instruments for performing interventional thrombectomy. A typical thrombectomy device includes an aspiration unit, aspiration catheter, and a guidewire. Existing thrombectomy devices reported in the art fall into two categories: Electric aspiration devices, which use an electric aspiration unit consisting of a vacuum pump and a main unit, have several drawbacks. Firstly, they are large, requiring significant hospital investment and resulting in high treatment costs. Secondly, their operation is complex, requiring the surgeon to simultaneously manage both the machine and the patient, making coordination difficult. Furthermore, they lack precise control over thrombus removal, easily leading to missed thrombi and excessive thrombus aspiration, causing excessive blood loss for the patient. Manual aspiration devices, using a manual aspiration unit, have a simpler structure and offer better control over the thrombus removal process. However, they suffer from lower aspiration efficiency, are prone to blockages, are physically demanding for the surgeon, and result in longer treatment times and increased patient discomfort. Summary of the Invention

[0004] The purpose of this invention is to provide a novel thrombus aspiration device that not only allows for precise control of thrombus removal but also achieves high removal efficiency and good removal effect, addressing the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A thrombus aspiration device includes an aspiration assembly. The aspiration assembly includes a housing having a pressure chamber, a piston rod slidably disposed at one end of the pressure chamber, an inlet pipe and an outlet pipe respectively communicating with the pressure chamber, and one-way valves respectively disposed on the inlet pipe and the outlet pipe. The thrombus aspiration device further includes a manual drive device and an electric drive device for driving the piston rod to slide relative to the housing. Both the manual drive device and the electric drive device can be respectively engaged with or connected to the piston rod. The thrombus aspiration device has a manual aspiration mode and an electric aspiration mode. When the thrombus aspiration device is in electric aspiration mode, the manual drive device is engaged or connected to the piston rod at a first position on the piston rod, and the electric drive device is engaged or connected to the piston rod. When the thrombus aspiration device is in manual aspiration mode, the manual drive device is engaged or connected to the piston rod at a second position on the piston rod, and the electric drive device is disengaged from the piston rod. The first position and the second position are connected, allowing the manual drive device to switch between the first position and the second position.

[0007] Preferably, the manual drive device includes a handle rotatably mounted on the housing and a drive rod rotatably connected at one end to the handle. The other end of the drive rod is rotatably connected to the piston rod via a pivot. When the pivot is in a first position of the piston rod, it can slide relative to the piston rod. When the pivot is in a second position of the piston rod, it cannot slide relative to the piston rod. In the first position, since the pivot can slide relative to the piston rod, even operating the handle will not drive the piston rod to slide relative to the housing, allowing the piston rod to slide only under the action of the electric drive device. Simultaneously, when the electric drive device drives the piston rod to reciprocate relative to the housing, the manual drive device will not affect the reciprocating sliding of the piston rod. In the second position, since the pivot cannot slide relative to the piston rod, operating the handle will drive the piston rod to slide via the drive rod.

[0008] Furthermore, the piston rod is provided with a sliding groove and a retaining groove, both of which match the rotating shaft. The sliding groove extends along the sliding direction of the piston rod and is connected to the retaining groove. When the rotating shaft is located at the first position of the piston rod, the rotating shaft is located in the sliding groove and can be slidably positioned along the length of the sliding groove. When the rotating shaft is located at the second position of the piston rod, the rotating shaft is engaged in the retaining groove. When the rotating shaft is in the sliding groove, the operation of the handle allows the rotating shaft to slide in the sliding groove, but the sliding groove remains stationary, meaning it does not drive the piston rod to move. When the electric drive device drives the piston rod to slide relative to the housing, the sliding groove slides relative to the rotating shaft, but the rotating shaft remains stationary, meaning the manual drive device remains stationary. When the rotating shaft is in the retaining groove, the operation of the handle causes the piston rod to slide relative to the housing due to the cooperation between the retaining groove and the rotating shaft. Furthermore, the slide and the slot are connected, allowing the rotating shaft to enter the slot from the slide and vice versa, enabling the thrombus aspiration device to switch freely between electric and manual aspiration modes, and the switching is convenient.

[0009] Furthermore, the electric drive device includes a first switch disposed within the housing for controlling the start and stop of the electric drive device. When the rotating shaft is at the first position of the piston rod, rotating the handle relative to the housing can drive the drive rod to abut against the first switch, thereby closing and opening the first switch. In electric aspiration mode, the first switch can be closed or opened by operating the handle. This allows the first switch to be disposed inside the housing, preventing accidental operation and improving safety. Moreover, the first switch can be closed or opened by operating the handle, eliminating the need for additional components and simplifying the structure of the thrombus aspiration device.

[0010] In one specific embodiment, the drive rod is an arc-shaped rod, with the second position located below the first position and the first switch located above the first position, and the first switch positioned along the sliding direction of the rotating shaft. Thus, when the handle rotates relative to the housing, the drive rod rotates and slides relative to the piston rod. The drive rod protrudes towards the first switch, and during rotation and sliding, it abuts against the first switch, thereby closing or opening the first switch. Furthermore, when the thrombus aspiration device is in manual aspiration mode, the drive rod's movement will not touch the first switch, causing frequent closing and opening of the first switch, thus affecting its service life.

[0011] This embodiment provides a specific structure of an electric drive device, which includes a gear rotatably disposed within the housing, a rack disposed on the piston rod and capable of meshing with the gear, and a motor for driving the gear to rotate. When the thrombus aspiration device is in electric aspiration mode, the gear meshes with the rack. When the thrombus aspiration device is in manual aspiration mode, the gear disengages from the rack.

[0012] Furthermore, the motor has a motor shaft, and the gear is slidably mounted on the motor shaft to engage or disengage with the rack; alternatively, the rack is slidably mounted on the piston rod to engage or disengage with the gear. That is, the engagement or disengagement of the gear and rack is achieved through relative sliding, thereby allowing the thrombus aspiration device to switch between electric and manual aspiration modes.

[0013] Furthermore, the thrombus aspiration device also includes a drive assembly, which includes a button for driving the gear and the rack to slide and disengage relative to each other. The button is rotatably mounted on the housing and can abut against or engage with the gear or the rack.

[0014] Furthermore, the thrombus aspiration device also includes a drive assembly for driving the rotating shaft to switch from a first position to a second position. The drive assembly includes a button rotatably mounted on the housing and a limiting rod that directly or indirectly cooperates with the button. The limiting rod is slidably mounted on the housing and abuts against the rotating shaft. The button is located outside the housing for easy manual operation, while the limiting rod is located inside the housing. Operating the button causes the limiting rod to slide relative to the housing, thereby driving the rotating shaft to slide relative to the housing from the first position to the second position, thus switching the thrombus aspiration device from electric aspiration mode to manual aspiration mode.

[0015] Preferably, the electric drive device further includes a first switch and a second switch, both of which are disposed within the housing. When the thrombus aspiration device is in electric aspiration mode, both the first switch and the second switch are in a closed state; when the thrombus aspiration device is in manual aspiration mode, both the first switch and the second switch are in a closed state. This improves the safety performance of the thrombus aspiration device during use and avoids accidental operation.

[0016] Furthermore, the thrombus aspiration device also includes a drive assembly, which includes a button rotatably mounted on the housing. When the thrombus aspiration device is in its initial state, the first switch is in the off state, and the button engages with the second switch to close it. When the button rotates relative to the housing, it disengages from the second switch, opening it. In the initial state, pressing the button against the second switch closes it, and releasing the button opens it, eliminating the need for separate operation of the second switch and simplifying the use of the thrombus aspiration device.

[0017] Preferably, the housing includes a main body extending in a front-to-back direction and a gripping portion, the gripping portion extending downward from the rear of the main body. This gives the housing a gun-shaped structure, which facilitates the carrying and operation of the thrombus aspiration device.

[0018] Preferably, the thrombus aspiration device further includes an aspiration catheter with one end connected to the inlet tube, a dilator detachably disposed at the other end of the aspiration catheter, and an aspiration guidewire detachably disposed within the aspiration catheter, the aspiration guidewire extending from both ends of the aspiration catheter to the outside of the aspiration catheter. The aspiration guidewire and dilator allow the aspiration catheter to enter the blood vessel and reach the thrombus location, thereby allowing the thrombus to be aspirated by operating a manual or electric drive device. The dilator constricts the end of the aspiration catheter to prevent damage to the vessel wall when the aspiration catheter enters the blood vessel.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] The thrombus aspiration device of this invention, through its ingenious structural design, can simultaneously achieve manual and electric dual aspiration modes within a single housing, and the switching between these modes is convenient. This allows doctors to choose one or a combination of modes based on the actual patient's condition, maximizing both the effectiveness and efficiency of thrombus removal. For example, for patients with severe thrombosis, the electric aspiration mode can be selected first. After efficiently removing most of the thrombus, the manual aspiration mode can be switched. In this mode, the doctor can use intuitive sensing, such as changes in aspiration pressure, to control the location and progress of thrombus aspiration, ensuring complete removal of the thrombus while avoiding over-operation and reducing patient blood loss. Furthermore, compared to existing electric aspiration devices, the thrombus aspiration device of this invention is more convenient to operate, aiding doctors in performing surgery. Simultaneously, the overall cost of the device is significantly reduced, allowing it to be made into a disposable product, helping to alleviate the investment and management burden on hospitals and reduce surgical expenses for patients. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the internal structure of the thrombus aspiration device in the electric aspiration mode of this embodiment;

[0022] Figure 2 This is one of the cross-sectional schematic diagrams of the thrombus aspiration device in the electric aspiration mode of this embodiment;

[0023] Figure 3 This is a second cross-sectional schematic diagram of the thrombus aspiration device in the electric aspiration mode of this embodiment;

[0024] Figure 4 This is a side view of the internal structure of the thrombus aspiration device in the electric aspiration mode of this embodiment;

[0025] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0026] Figure 6 This is the third cross-sectional schematic diagram of the thrombus aspiration device in the electric aspiration mode of this embodiment;

[0027] Figure 7 for Figure 6 Enlarged view of a portion of point A in the middle;

[0028] Figure 8 This is a front view of the internal structure of the thrombus aspiration device in manual aspiration mode according to this embodiment;

[0029] Figure 9 This is a side view of the internal structure of the thrombus aspiration device in manual aspiration mode according to this embodiment;

[0030] Figure 10 for Figure 9Enlarged view of a portion of point A in the middle;

[0031] Figure 11 This is one of the three-dimensional schematic diagrams of a portion of the structure of the thrombus aspiration device in manual aspiration mode according to this embodiment;

[0032] Figure 12 This is the second perspective view of a portion of the structure of the thrombus aspiration device in manual aspiration mode according to this embodiment;

[0033] Figure 13 This is a three-dimensional schematic diagram of the thrombus aspiration device in this embodiment (outer view, excluding the aspiration catheter, aspiration guide wire and dilator).

[0034] Figure 14 This is a three-dimensional schematic diagram (outer view) of the thrombus aspiration device in this embodiment.

[0035] The components are as follows: 1. Housing; 11. Main body; 12. Grip; 21. Piston rod; 211. Piston; 212. Rod body; 212a. Slide groove; 212b. Slot; 22. First elastic element; 31. Inlet pipe; 32. Outlet pipe; 33. One-way valve; 41. Handle; 42. Drive rod; 43. Second elastic element; 51. Motor; 52. Gear; 53. Rack; 54. First switch; 55. Second switch; 6. Rotating shaft; 71. Button; 711. Pressing part; 712. Fitting part; 72. Limiting rod; 73. Third elastic element; 74. Fourth elastic element; 81. Suction conduit; 82. Suction guide wire; 83. Diverter. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, such as... Figure 1In the figures, the left direction is "front," the right direction is "rear," the top direction is "up," and the bottom direction is "down." The directions perpendicular to the paper are "left" and "right." This is merely for ease of description and simplification of the invention, and does 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, it should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] As shown in Figure 1~ Figure 14 As shown, the thrombus aspiration device of the present invention includes an aspiration assembly, an electric drive device, and a manual drive device.

[0039] The suction assembly includes a housing 1, which has a pressure chamber A. The suction assembly also includes a piston rod 21, which is located at one end of the pressure chamber A and is reciprocally slidably disposed within the housing 1.

[0040] The piston rod 21 includes a piston 211 and a rod body 212. The piston 211 is located at one end of the pressure chamber A. The piston 211 is in a sealed sliding connection with the inner wall of the housing 1. One end of the rod body 212 is fixedly mounted on the piston 211.

[0041] The suction assembly also includes an inlet pipe 31 and an outlet pipe 32. The inlet pipe 31 is located in front of the pressure chamber A and communicates with the front part of the pressure chamber A. The outlet pipe 32 is located behind the pressure chamber A and communicates with the rear part of the pressure chamber A.

[0042] The aspiration assembly also includes one-way valves 33 respectively installed on the inlet pipe 31 and the outlet pipe 32, thereby forming a passage that allows the thrombus to flow only in one direction from the inlet pipe 31 to the pressure chamber A to the outlet pipe 32.

[0043] The suction assembly also includes a first elastic element 22, the elastic force of which is used to drive the piston rod 21 to slide back to its original position relative to the housing 1. In this embodiment, the elastic force of the first elastic element 22 is used to drive the piston rod 21 to slide forward relative to the housing 1. One end of the first elastic element 22 is disposed on the piston 211, and the other end of the first elastic element 22 is disposed on the housing 1.

[0044] When the piston rod 21 slides back and forth relative to the housing 1, it creates a negative pressure in the pressure chamber A. Under the action of the negative pressure, the blood clot in the blood vessel is drawn into the inlet pipe 31 and flows out through the outlet pipe 32 via the pressure chamber A. Figure 3 As shown.

[0045] The manual drive device is engaged or connected with the piston rod 21. By operating the manual drive device, the piston rod 21 can be driven to slide relative to the housing 1, and the piston rod 21 can be reversed and reset by the first elastic element 22. This repeated operation causes the piston rod 21 to slide back and forth relative to the housing 1, generating negative pressure in the pressure chamber A of the housing 1, thereby aspirating the thrombus in the blood vessel and putting the thrombus aspiration device into manual aspiration mode.

[0046] Specifically, the manual drive device includes a handle 41 and a drive rod 42. The handle 41 is rotatably mounted on the housing 1, one end of the drive rod 42 is rotatably connected to the handle 41, and the other end of the drive rod 42 is rotatably connected to the piston rod 21 via a rotating shaft 6.

[0047] When the operating handle 41 rotates relative to the housing 1, the driving rod 42 drives the piston rod 21 to slide backward relative to the housing 1. When the handle 41 is released, the piston rod 21 slides forward under the elastic force of the first elastic element 22. This achieves the reciprocating sliding of the piston rod 21.

[0048] The manual drive device also includes a second elastic element 43, one end of which is disposed on the handle 41, and the other end of which is disposed on the housing 1. When the handle 41 is released, the elastic force of the second elastic element 43 is used to drive the handle 41 to rotate in the opposite direction relative to the housing 1 to reset.

[0049] The electric drive device is engaged or connected with the piston rod 21. The electric drive device can drive the piston rod 21 to slide back and forth relative to the housing 1, so as to generate negative pressure in the pressure chamber A of the housing 1, thereby aspirating the thrombus in the blood vessel and putting the thrombus aspiration device into electric aspiration mode.

[0050] Specifically, the electric drive device includes a motor 51, a gear 52, and a rack 53. The motor 51 is housed within the housing 1, the gear 52 is mounted on the motor shaft of the motor 51, and the rack 53 is mounted on the piston rod 21. The gear 52 can mesh with the rack 53. When the motor 51 starts, the motor shaft rotates, driving the gear 52 to rotate. When the gear 52 meshes with the rack 53, it drives the rack 53 to slide relative to the housing 1, thereby causing the piston rod 21 to slide synchronously relative to the housing 1. The reciprocating sliding of the piston rod 21 can be achieved by the forward and reverse rotation of the motor 51.

[0051] The electric drive device also includes a first switch 54 and a second switch 55, both of which are housed within the housing 1. Both switches 54 and 55 have closed and open states. The motor 51 can only be energized and started when both switches 54 and 55 are closed, thus putting the thrombus aspiration device into electric aspiration mode to aspirate thrombi from blood vessels. This improves the safety performance of the thrombus aspiration device and prevents it from being switched to electric aspiration mode due to misoperation.

[0052] In the initial state, the second switch 55 of the thrombus aspiration device is closed and the first switch 54 is open. When the electric drive device is started, the first switch 54 needs to be pressed to power on and start the motor 51.

[0053] In this embodiment, the drive rod 42 is arc-shaped. When the drive rod 42 is rotated relative to the piston rod 21 and slid backward by the operating handle 41, the first switch 54 is located in the sliding direction of the drive rod 42, and the arc-shaped protrusion of the drive rod 42 faces the first switch 54, so that the drive rod 42 can touch the first switch 54, causing the first switch 54 to change from the open state to the closed state. When the first switch 54 is opened from the closed state, the operating handle 41 is also required to touch the first switch 54 by moving the drive rod 42.

[0054] like Figures 1-7 As shown, when the thrombus aspiration device is in electric aspiration mode:

[0055] The electric drive unit is engaged or connected to the piston rod 21, that is, the gear 52 and the rack 53 are in a meshing state.

[0056] The manual drive device engages with or connects to the piston rod 21 at the first position where the rotating shaft 6 is on the piston rod 21. At this point, the rotating shaft 6 can also slide relative to the piston rod 21. Thus, when the piston rod 21 is driven to reciprocate via the electric drive device, the handle 41 and drive rod 42 remain stationary, while the piston rod 21 can slide relative to the rotating shaft 6, ensuring that the manual drive device does not affect the reciprocating sliding of the piston rod 21. When the handle 41 is operated, the piston rod 21 remains stationary, and the drive rod 42 drives the rotating shaft 6 to slide relative to the piston rod 21. In other words, the piston rod 21 only reciprocates relative to the housing 1 under the drive of the electric drive device.

[0057] In this embodiment, the piston rod 21 has a groove 212a extending along its sliding direction on its rod body 212, and the groove 212a matches the rotating shaft 6. When the rotating shaft 6 is in the first position on the piston rod 21, the rotating shaft 6 is located in the groove 212a and can be slidably arranged along the length extension direction of the groove 212a.

[0058] like Figures 8-12As shown, when the thrombus aspiration device is in manual aspiration mode:

[0059] Both the first switch 54 and the second switch 55 are in the off state, disengaging the electric drive device from the piston rod 21, i.e., disengaging the gear 52 from the rack 53. The manual drive device is in the second position on the piston rod 21 at the point where the rotating shaft 6 is engaged or connected to the piston rod 21, and at this time, the rotating shaft 6 cannot slide relative to the piston rod 21. Thus, when the handle 41 is operated, the handle 41 rotates relative to the housing 1, causing the drive rod 42 to rotate relative to the handle 41, thereby causing the drive rod 42 to drive the piston rod 21 to slide backward relative to the housing 1.

[0060] In this embodiment, the piston rod 21 has a groove 212b on its rod body 212 that matches the rotating shaft 6. When the rotating shaft 6 is in the second position on the piston rod 21, it is engaged in the groove 212b, allowing it to rotate only relative to the groove 212b. Thus, when the handle 41 rotates to actuate the drive rod 42, the piston rod 21 can slide relative to the housing 1.

[0061] The slide groove 212a is connected to the slot 212b, so that the rotating shaft 6 can enter the slot 212b from the slide groove 212a and also enter the slide groove 212a from the slot 212b. This allows the thrombus aspiration device to switch between electric aspiration mode and manual aspiration mode, and the switching is convenient.

[0062] In this embodiment, the first switch 54 is located above the slide groove 212a, and the slot 212b is located below the slide groove 212a. This way, when the drive rod 42 is activated in manual suction mode, the drive rod 42 is prevented from touching the first switch 54, thus avoiding frequent closing and opening of the first switch 54 and affecting its service life.

[0063] The gear 52 and rack 53 can slide relative to each other, thereby enabling the gear 52 and rack 53 to mesh and disengage. In this embodiment, the gear 52 is slidably mounted on the motor shaft, and the rack 53 is fixedly mounted on the rod 212 of the piston rod 21. By driving the gear 52 to slide up and down relative to the motor shaft, the gear 52 and rack 53 can mesh or disengage. Alternatively, the gear 52 can be fixedly mounted on the motor shaft, and the rack 53 can be slidably mounted on the piston rod 21. By sliding the rack 53 up and down relative to the piston rod 21, the gear 52 and rack 53 can also mesh or disengage.

[0064] The thrombus aspiration device also includes a drive assembly. When the drive assembly is operated in the electric aspiration mode, the second switch 55 can be turned off, causing the gear 52 and rack 53 to slide relative to each other, disengaging the mesh between them, and moving the rotating shaft 6 from the first position on the piston rod 21 to the second position. This allows the rotating shaft 6 to enter the slot 212b from the slide groove 212a on the piston rod 21, thus switching the thrombus aspiration device to manual aspiration mode.

[0065] Specifically, the drive component includes a button 71, which is rotatably mounted on the housing 1. When the button 71 rotates relative to the housing 1, it engages with the gear 52. When the thrombus aspiration device operates the button 71 in electric mode, the button 71 rotates relative to the housing 1 and engages with the gear 52, causing the gear 52 to slide downward relative to the motor axis, thereby disengaging the gear 52 from the rack 53.

[0066] When the thrombus aspiration device is in electric aspiration mode, button 71 abuts against the second switch 55, causing the second switch 55 to be in the closed state. When button 71 is operated, button 71 rotates relative to housing 1, disengaging it from the second switch 55, thereby changing the second switch 55 from the closed state to the open state.

[0067] The drive assembly also includes a limiting rod 72, which is slidably disposed within the housing 1. The limiting rod 72 abuts against the rotating shaft 6 and directly or indirectly engages with the button 71. In this embodiment, the limiting rod 72 abuts against the gear 52. When the thrombus aspiration device operates the button 71 in electric mode, the button 71 abuts against the gear 52, causing the gear 52 to slide downward relative to the motor axis. The gear 52 acts on the limiting rod 72, causing the limiting rod 72 to slide downward. The limiting rod 72 acts on the rotating shaft 6, causing the rotating shaft 6 to enter the slot 212b from the slide groove 212a.

[0068] The button 71 includes a pressing part 711 and a mating part 712. The pressing part 711 is located outside the housing 1 for easy operation by hand. The mating part 712 is housed inside the housing 1 and can engage with the second switch 55 and the gear 52 respectively.

[0069] The drive assembly also includes a third elastic element 73. The elastic force of the third elastic element 73 is used to drive the gear 52 and the limiting rod 72 to slide upward, thereby engaging the gear 52 with the rack 53. In this embodiment, one end of the third elastic element 73 is disposed on the limiting rod 72, and the other end of the third elastic element 73 is disposed on the motor 51.

[0070] The drive assembly also includes a fourth elastic element 74. The elastic force of the fourth elastic element 74 is used to drive the rotating shaft 6 from the slot 212b into the slide groove 212a, so that the thrombus aspiration device switches from manual aspiration mode to electric aspiration mode. In this embodiment, the fourth elastic element 74 is a torsion spring, one end of the fourth elastic element 74 is disposed on the handle 41, and the other end of the fourth elastic element 74 is disposed on the drive rod 42.

[0071] like Figure 13 As shown, the housing 1 includes a main body 11 and a grip 12. The main body 11 extends in a front-to-back direction, and the grip 12 extends downward from the rear of the main body 11. The suction assembly, electric drive device, and drive assembly are all disposed within the main body 11, and the handle 41 is rotatably disposed in front of the grip 12. Thus, the housing 1 has an overall gun-shaped structure, making the thrombus aspiration device easy to carry and convenient to operate.

[0072] The thrombus aspiration device also includes an aspiration catheter 81, an aspiration guidewire 82, and a dilator 83. One end of the aspiration catheter 81 is connected to the inlet tube 31, and the other end of the aspiration catheter 81 can extend into the blood vessel and reach the location of the thrombus. The aspiration guidewire 82 is detachably disposed within the aspiration catheter 81, and both ends of which can extend out from the aspiration catheter 81. The aspiration guidewire 82 is used to guide the aspiration catheter 81 into the blood vessel and along the blood vessel to the location of the thrombus. The dilator 83 is detachably disposed at the other end of the aspiration catheter 81. The dilator 83 constricts the aspiration catheter 81 when the other end of the aspiration catheter 81 enters the blood vessel, thereby preventing damage to the blood vessel wall when the other end of the aspiration catheter 81 enters the blood vessel.

[0073] The working principle of this thrombus aspiration device is as follows:

[0074] The aspiration catheter 81 is not connected to the inlet tube 31. The aspiration guidewire 82 is inserted into the blood vessel through the sheath, and the aspiration catheter 81 with the dilator 83 is inserted into the blood vessel along the aspiration guidewire 82 and reaches the thrombus. The aspiration guidewire 82 and the dilator 83 are removed from the aspiration catheter 81, and the aspiration catheter 81 is connected to the inlet tube 31.

[0075] Initially, the second switch 55 is closed, and the first switch 54 is open. When the thrombus aspiration device begins to aspirate the thrombus at the start of the surgery, it is in electric aspiration mode. Gear 52 and rack 53 are engaged, the rotating shaft 6 is located in the groove 212a on the piston rod 21, and directly above the slot 212b. The first switch 54 is located behind the rotating shaft 6. Figures 1-7 As shown.

[0076] Operating handle 41 causes it to rotate relative to housing 1, which in turn causes drive rod 42 to rotate relative to handle 41 and piston rod 21. This causes shaft 6 to slide backward in slide groove 212a. Drive rod 42 then contacts first switch 54, causing it to switch from open to closed. At this time, motor 51 is powered on and starts, its shaft rotating and driving gear 52 to rotate synchronously. Through the meshing of gear 52 and rack 53, rack 53 causes piston rod 21 to slide relative to housing 1. When motor 51 rotates forward and backward, piston rod 21 slides back and forth, thereby generating negative pressure in pressure chamber A. Under the action of negative pressure, blood clots in blood vessels are sucked out.

[0077] When most of the thrombi have been aspirated, operate the handle 41 again, and the drive rod 42 will touch the first switch 54 again, so that the first switch 54 changes from the closed state to the open state, thereby de-energizing the motor 51 and stopping the piston rod 21.

[0078] After most of the thrombi are aspirated, the remaining free thrombi are manually aspirated to control the precision of the procedure and avoid excessive blood loss in the patient. The thrombus aspiration device is switched from electric to manual aspiration mode by operating the drive assembly. Specifically, pressing the button 711 causes the button 71 to rotate relative to the housing 1. The mating part 712 of the button 71 disengages from the second switch 55, changing the second switch 55 from a closed to an open state. While the button 71 rotates relative to the housing 1, the mating part 712 of the button 71 simultaneously presses against the gear 52, causing the gear 52 to slide downwards along the motor axis, thereby disengaging from the rack 53. As the gear 52 slides downwards, the limiting rod 72 slides downwards synchronously due to the pressing action of the gear 52. The limiting rod 72 presses against the rotating shaft 6, causing the rotating shaft 6 to slide downwards into the slot 212b. Thus, the thrombus aspiration device is switched to manual aspiration mode. Figures 8-12 As shown.

[0079] In manual aspiration mode, when the operating handle 41 is rotated relative to the housing 1, the piston rod 21 is driven to slide backward relative to the housing 1 via the drive rod 42. Upon releasing the handle 41, it returns to its original position under the elastic force of the second elastic element 43, and the piston rod 21 slides forward to its original position under the elastic force of the first elastic element 22. This repeated operation causes the piston rod 21 to slide back and forth, thereby generating negative pressure within the pressure chamber A, which aspirates the thrombus from the blood vessel.

[0080] When the thrombus aspiration device switches from manual aspiration mode to electric aspiration mode, as long as the button 71 is rotated in the opposite direction to reset, the limit rod 72 and gear 52 will slide upward to reset under the elastic force of the third elastic element 73, and the drive rod 42 will move under the elastic force of the fourth elastic element 74 to make the rotating shaft 6 enter the slide groove 212a from the slot 212b.

[0081] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A thrombus aspiration device, comprising an aspiration assembly, the aspiration assembly including a housing having a pressure chamber, a piston rod reciprocally slidingly disposed at one end of the pressure chamber, an inlet pipe and an outlet pipe respectively communicating with the pressure chamber, and one-way valves respectively disposed on the inlet pipe and the outlet pipe, characterized in that: The thrombus aspiration device further includes a manual drive device and an electric drive device for driving the piston rod to slide relative to the housing. Both the manual drive device and the electric drive device can be engaged or connected to the piston rod respectively. The thrombus aspiration device has a manual aspiration mode and an electric aspiration mode. When the thrombus aspiration device is in the electric aspiration mode, the engagement or connection point of the manual drive device with the piston rod is located at a first position of the piston rod, and the electric drive device is engaged or connected to the piston rod. When the thrombus aspiration device is in the manual aspiration mode, the engagement or connection point of the manual drive device with the piston rod is located at a second position of the piston rod, and the engagement or connection point of the electric drive device with the piston rod is disengaged. The first position and the second position are connected so that the engagement or connection point of the manual drive device with the piston rod can switch between the first position and the second position. The manual drive device includes a handle rotatably mounted on the housing and a drive rod rotatably connected at one end to the handle. The other end of the drive rod is rotatably connected to the piston rod via a pivot. When the pivot is in the first position of the piston rod, the pivot can also be slidably mounted relative to the piston rod. When the pivot is in the second position of the piston rod, the pivot cannot slide relative to the piston rod. The piston rod is provided with a sliding groove and a retaining groove, both of which are matched with the rotating shaft. The sliding groove extends along the sliding direction of the piston rod and is connected to the retaining groove. When the rotating shaft is located at the first position of the piston rod, the rotating shaft is located in the sliding groove and can be slidably arranged along the length extension direction of the sliding groove. When the rotating shaft is located at the second position of the piston rod, the rotating shaft is engaged in the retaining groove.

2. The thrombus aspiration device according to claim 1, characterized in that: The electric drive device includes a first switch disposed within the housing for controlling the start and stop of the electric drive device. When the rotating shaft is located at the first position of the piston rod, rotating the handle relative to the housing can drive the drive rod to abut against the first switch, thereby closing and opening the first switch.

3. The thrombus aspiration device according to claim 2, characterized in that: The drive rod is an arc-shaped rod, the second position is located below the first position, the first switch is located above the first position, and the first switch is located in the sliding direction of the rotating shaft.

4. The thrombus aspiration device according to claim 1, characterized in that: The thrombus aspiration device further includes a drive assembly for driving the rotating shaft to switch from a first position to a second position. The drive assembly includes a button rotatably disposed on the housing and a limiting rod that directly or indirectly cooperates with the button. The limiting rod is slidably disposed on the housing and abuts against the rotating shaft.

5. The thrombus aspiration device according to claim 1, characterized in that: The electric drive device further includes a gear rotatably disposed within the housing, a rack disposed on the piston rod and capable of meshing with the gear, and a motor for driving the gear to rotate. When the thrombus aspiration device is in electric aspiration mode, the gear meshes with the rack, and when the thrombus aspiration device is in manual aspiration mode, the gear disengages from the rack.

6. The thrombus aspiration device according to claim 5, characterized in that: The motor has a motor shaft, and the gear is slidably mounted on the motor shaft so that the gear meshes with or disengages from the rack; or, the rack is slidably mounted on the piston rod so that the gear meshes with or disengages from the rack.

7. The thrombus aspiration device according to claim 6, characterized in that: The thrombus aspiration device further includes a drive assembly, which includes a button for driving the gear and the rack to slide and disengage relative to each other. The button is rotatably mounted on the housing and can abut against or engage with the gear or the rack.

8. The thrombus aspiration device according to claim 1, characterized in that: The electric drive device also includes a first switch and a second switch, both of which are disposed within the housing. When the thrombus aspiration device is in electric aspiration mode, both the first switch and the second switch are in a closed state. When the thrombus aspiration device is in manual aspiration mode, both the first switch and the second switch are in an open state.

9. The thrombus aspiration device according to claim 8, characterized in that: The thrombus aspiration device further includes a drive assembly, which includes a button rotatably mounted on the housing. When the thrombus aspiration device is in the initial state, the first switch is in the off state, and the button abuts against the second switch to make the second switch in the closed state. When the button rotates relative to the housing, the button disengages from the second switch to make the second switch in the off state.

10. The thrombus aspiration device according to claim 1, characterized in that: The housing includes a main body extending in a front-rear direction and a gripping portion extending downward from the rear of the main body.

11. The thrombus aspiration device according to claim 1, characterized in that: The thrombus aspiration device also includes an aspiration catheter with one end connected to the inlet tube, an expander detachably disposed at the other end of the aspiration catheter, and an aspiration guide wire detachably disposed inside the aspiration catheter, wherein the aspiration guide wire extends from both ends of the aspiration catheter to the outside of the aspiration catheter.

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