Thrombectomy device

Abstract

The present application relates to the field of medical devices, and discloses a thrombus removing device, which comprises an inner tube, a removing structure, the removing structure comprising a cutting plug pipe, a cutting plug basket and a sliding sleeve arranged in sequence along the length direction of the inner tube, the cutting plug pipe, the cutting plug basket and the sliding sleeve being slidably sleeved on the inner tube, the two ends of the cutting plug basket being connected with the cutting plug pipe and the sliding sleeve respectively, the cutting plug basket being made of shape memory alloy, and a rotary driving device connected with the cutting plug pipe to drive the cutting plug pipe to rotate. In the specific use process, the rotating speed of the cutting plug pipe is adjusted, the sliding sleeve moves along the length direction of the inner tube, and the size of the cutting plug basket changes with the movement of the sliding sleeve. In this way, the size of the cutting plug basket can be adapted to the size of the blood vessel by adjusting the rotating speed of the cutting plug pipe, thereby effectively avoiding the situation that the size of the cutting plug basket is not adapted to the size of the blood vessel, causing the damage of the blood vessel wall.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a thrombus removal device. Background Technology

[0002] Deep vein thrombosis (DVT), also known as lower extremity venous thrombosis, is collectively referred to as venous thromboembolism (VTE) along with pulmonary thromboembolism (PE). With an aging population and changing lifestyles, VTE has become a global health crisis, with over 10 million people diagnosed annually. DVT can be broadly classified based on the location of the thrombus: inferior vena cava thrombosis, iliofemoral vein thrombosis, and calf venous plexus thrombosis. Due to the obvious acute symptoms and increased health awareness, many patients can receive treatment during the acute thrombotic phase.

[0003] Currently, treatment generally requires the use of thrombus removal devices, which include removal structures for breaking and cutting thrombi. However, existing removal structures have fixed dimensions and are not adjustable. During cutting, because the cutting structure is not compatible with the size of the blood vessel, it is very easy to cause damage to the blood vessel wall.

[0004] Therefore, how to provide a thrombus removal device that can be adapted to the size of blood vessels has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To address the above technical problems, the present invention provides a thrombus removal device that can be adapted to the size of blood vessels.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a thrombus removal device, comprising: an inner tube; a removal structure, the removal structure including a thrombectomy tube, a thrombectomy basket, and a sliding sleeve arranged sequentially along the length of the inner tube, the thrombectomy tube, the thrombectomy basket, and the sliding sleeve being slidably fitted onto the inner tube, the two ends of the thrombectomy basket being connected to the thrombectomy tube and the sliding sleeve respectively, the thrombectomy basket being made of shape memory alloy; and a rotation drive device connected to the thrombectomy tube to drive the thrombectomy tube to rotate.

[0008] Preferably, the shape memory alloy is a two-way shape memory alloy.

[0009] Preferably, the thrombus removal device further includes a double-layered catheter, a connector, and a sealing structure; the double-layered catheter includes an inner catheter and an outer catheter arranged coaxially and interlocked, the inner catheter being connected to the outer catheter, a space being formed between the inner and outer catheters, and both ends of the space being sealed, the thrombectomy tube being fitted inside the inner catheter, the outer catheter being provided with a first positioning balloon communicating with the space, and the first end of the inner catheter being provided with a second positioning balloon communicating with the interior of the inner catheter, and the second positioning balloon, the sliding sleeve, the thrombectomy basket, and the thrombectomy tube being arranged sequentially along the length of the inner catheter; the connector includes a main tube, a first branch tube, and a second branch tube, the double-layered catheter being fitted inside the main tube and connected to the main tube, the first branch tube communicating with the space, and the second branch tube communicating with the interior of the inner catheter; the sealing structure includes a guide wire and a sealing block, the sealing block being disposed on the guide wire, and the sealing block being used to seal the first end of the inner tube.

[0010] Preferably, the thrombus removal device further includes two clamping structures, both of which are disposed on the rotary drive device, and one of the two clamping structures is used to clamp the thrombus-cutting tube and the other is used to clamp the inner tube.

[0011] Preferably, the clamping structure includes a first connecting part, a second connecting part, a sealing block, and a top block. The first connecting part is provided with an internal thread, and the second connecting part is provided with an external thread. The second connecting part extends into the interior of the first connecting part, and the external thread of the second connecting part is threadedly connected to the internal thread of the first connecting part. Both ends of the sealing block are tapered structures, and the two ends of the sealing block are symmetrical to each other. The top block is disposed inside the first connecting part. The second connecting part is provided with an installation groove. The sealing block is disposed in the installation groove, and the top block extends into the installation groove. The top block and the bottom end of the installation groove are provided with tapered grooves that match the tapered structures. The two tapered structures are respectively disposed in the two tapered grooves.

[0012] Preferably, a sealing sleeve is provided at the end of the main pipe away from the sliding sleeve, the sealing sleeve is recessed toward the end closer to the sliding sleeve, and a slit is provided at the center of the sealing sleeve for the cutting tube and the inner tube to pass through.

[0013] Preferably, the slit has a cross-shaped structure.

[0014] Preferably, the thrombus removal device further includes an auxiliary tube for assisting the thrombus-cutting basket through the slit.

[0015] Preferably, the first branch pipe is provided with a first valve for opening or closing the first branch pipe, and the second branch pipe is provided with a second valve for opening or closing the second branch pipe.

[0016] Preferably, the rotary drive device includes a housing, a rotating shaft, a reduction gear set, and a motor. The rotating shaft is rotatably mounted on the housing. The first end of the rotating shaft is connected to the reduction gear set, which is connected to the motor. The reduction gear set is used to reduce the output speed of the motor and transmit the reduced speed to the rotating shaft. The second end of the rotating shaft is connected to the bolt cutter to drive the bolt cutter to rotate.

[0017] The present invention achieves the following technical effects compared to the prior art:

[0018] The thrombus removal device provided by the present invention includes: an inner tube; a removal structure, which includes a thrombectomy tube, a thrombectomy basket, and a sliding sleeve arranged sequentially along the length of the inner tube, wherein the thrombectomy tube, the thrombectomy basket, and the sliding sleeve are slidably fitted onto the inner tube, and the two ends of the thrombectomy basket are respectively connected to the thrombectomy tube and the sliding sleeve, and the thrombectomy basket is made of shape memory alloy; and a rotation drive device, which is connected to the thrombectomy tube to drive the thrombectomy tube to rotate.

[0019] In practical use, by adjusting the rotation speed of the thrombectomy tube, the sliding sleeve moves along the length of the inner tube. As the sliding sleeve moves, the size of the thrombectomy basket changes accordingly. In this way, by adjusting the rotation speed of the thrombectomy tube, the size of the thrombectomy basket can be adapted to the size of the blood vessel. This effectively avoids the situation where the existing removal structure has a fixed and non-adjustable size, and the blood vessel wall is easily damaged during cutting due to the mismatch between the cutting structure and the blood vessel size. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the thrombus removal device provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the thrombus removal device structure provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the thrombus removal device connector provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the sealing structure of the thrombus removal device provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the clamping structure of the thrombus removal device provided in an embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of a multi-lumen pipe fitting;

[0027] Figure 7 This is a cross-sectional view of a single-lumen pipe fitting;

[0028] Figure 8 This is a cross-sectional view of a single-lumen pipe fitting when other pipe fittings are inserted.

[0029] Figure 9 This is a schematic diagram illustrating the arrangement of the slit in the thrombus removal device provided in an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the rotating drive device of the thrombus removal device provided in an embodiment of the present invention.

[0031] Figures 1-10 Explanation of reference numerals in the attached drawings: 100, Thrombus removal device; 1, Inner tube; 2, Removal structure; 201, Thrombus cutting tube; 202, Thrombus cutting basket; 203, Sliding sleeve; 3, Rotary drive device; 301, Outer shell; 302, Rotating shaft; 303, Reduction gear set; 304, Motor; 4, Double-layer catheter; 5, Connector; 501, Main tube; 502, First branch tube; 503, Second branch tube; 504, Sealing sleeve; 5041, Slit; 505, First valve; 506, Second valve; 6, Guide wire; 7, Blocking block; 8, Clamping structure; 801, First connecting part; 802, Second connecting part; 803, Sealing block; 804, Top block; 805, Conical structure; 9, First positioning capsule; 10, Second positioning capsule; 11, Connecting joint; 12, Auxiliary tube; 13, Multi-lumen fitting; 14. Single-lumen fitting; 15. Cavity. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0033] The purpose of this invention is to provide a thrombus removal device that can be adapted to the size of blood vessels.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] refer to Figures 1-7 As shown, the thrombus removal device 100 provided in this embodiment includes: an inner tube 1; a removal structure 2, which includes a thrombus-cutting tube 201, a thrombus-cutting basket 202, and a sliding sleeve 203 arranged sequentially along the length of the inner tube 1. The thrombus-cutting tube 201, the thrombus-cutting basket 202, and the sliding sleeve 203 are all slidably fitted onto the inner tube 1. The two ends of the thrombus-cutting basket 202 are respectively connected to the thrombus-cutting tube 201 and the sliding sleeve 203. The thrombus-cutting basket 202 is made of shape memory alloy; and a rotation drive device 3, which is connected to the thrombus-cutting tube 201 to drive the thrombus-cutting tube 201 to rotate.

[0036] In practical use, by adjusting the rotation speed of the thrombectomy tube 201, the sliding sleeve 203 moves along the length of the inner tube 1. As the sliding sleeve 203 moves, the size of the thrombectomy basket 202 changes accordingly. In this way, by adjusting the rotation speed of the thrombectomy tube 201, the size of the thrombectomy basket 202 can be adapted to the size of the blood vessel, effectively avoiding the situation where the existing removal structure 2 has a fixed and non-adjustable size, and the blood vessel wall is easily damaged during cutting due to the mismatch between the cutting structure and the blood vessel size.

[0037] In this embodiment, the shape memory alloy is a two-way shape memory alloy. More specifically, a nickel-titanium alloy is selected as the two-way shape memory alloy. Furthermore, the bolt basket 202 is made of nickel-titanium wire.

[0038] After repeated heat treatment within the phase transformation range (SME method, shape memory alloy cyclic method), the nickel-titanium wire exhibits a two-way shape memory effect, correspondingly possessing two shapes. In practical application, based on the diameter requirements of the thrombolytic basket 202, the operator maintains a constant temperature water bath on the mixture of thrombolytic agent and physiological saline at different temperatures. After injecting the mixture into the thrombolytic position, the shape of the thrombolytic basket 202 is altered by the temperature of the mixture (high-temperature state: martensite-R-phase-austenite transformation, with the parent phase being a large-diameter thrombolytic basket 202; low-temperature state: austenite-R-phase-martensite transformation, with the deformed phase being a smaller-diameter thrombolytic basket 202). In both shapes, the sliding sleeve 203 can slide along the length of the inner tube 1, thereby achieving size adjustment of the thrombolytic basket 202 under different shapes. By employing a two-way shape memory alloy, the adjustment range of the thrombolytic basket 202's size is effectively broadened. In this way, the size of the thrombectomy basket 202 can be better adapted to the size of the blood vessel.

[0039] In this embodiment, as Figures 3-4As shown, the thrombus removal device 100 also includes a double-layered catheter 4, a connector 5, and a sealing structure; the double-layered catheter 4 includes an inner catheter and an outer catheter that are coaxially arranged with inner and outer sleeves. The inner catheter is connected to the outer catheter, and a space is formed between the inner and outer catheters. Both ends of the space are sealed. The thrombectomy tube 201 is sleeved inside the inner catheter. The outer catheter is provided with a first positioning balloon 9 that communicates with the space. The first end of the inner tube 1 is provided with a second positioning balloon 10 that communicates with the inside of the inner tube 1. The second positioning balloon 10 and the sliding sleeve... 203. The bolt cutting basket 202 and the bolt cutting tube 201 are arranged sequentially along the length of the inner tube 1; the connecting body 5 includes a main tube 501, a first branch tube 502 and a second branch tube 503, the double-layer conduit 4 is sleeved inside the main tube 501 and connected to the main tube 501, the first branch tube 502 is connected to the interlayer, and the second branch tube 503 is connected to the inside of the inner conduit; the sealing structure includes a guide wire 6 and a sealing block 7, the sealing block 7 is set on the guide wire 6, and the sealing block 7 is used to seal the first end of the inner tube 1.

[0040] Injecting air or contrast agent into the interlayer of the double-layer catheter 4 through the first branch tube 502 can inflate the first positioning sac 9; the blocking block 7 blocks the first end of the inner tube 1, and injecting air or contrast agent into the inner tube 1 through the second end of the inner tube 1 can inflate its second positioning sac 10; thrombolytic drugs are injected into the main tube 501 through the second branch tube 503, and the thrombolytic drugs are released into the blood vessel at the location where thrombolysis is required through the gap between the thrombectomy tube 201 and the main tube 501.

[0041] In practical use, after injecting the mixture of thrombolytic drug and saline, the thrombectomy basket 202 breaks and cuts the thrombus, turning large thrombi into smaller, fragmented ones, resulting in a suspension of thrombi thoroughly mixed with blood. Then, the second positioning capsule 10 is depressurized, retracting the inner tube 1 into the thrombectomy tube 201. Next, the removal structure 2 and the inner tube 1 are retracted together into the main tube 501 within the double-layered catheter 4 and withdrawn from the main tube 501. After the inner tube 1 and the removal structure 2 are withdrawn, the first positioning capsule 9 is depressurized, connecting the second branch tube 503 to the aspiration device. Aspiration is performed while the double-layered catheter 4 is moved. It should be noted that the specific structure of the aspiration device is prior art and not the focus of this invention; therefore, it will not be described further here.

[0042] Furthermore, both the first positioning balloon 9 and the second positioning balloon 10 are balloons. In practical use, the first balloon is used to position the double-layered catheter 4, and the second balloon is used to position the inner tube 1. Additionally, a closed area is formed between the first positioning balloon 9 and the second positioning balloon 10. The thrombus is contained within this closed area. Thrombolytic drugs are injected into this closed area; the drugs will not be carried away by the bloodstream, thus effectively dissolving and sealing the thrombus. This allows for better results with a smaller dose of thrombolytic drug.

[0043] Furthermore, the two ends of the interlayer are sealed by bonding the inner and outer conduits with adhesive.

[0044] In this embodiment, the thrombus removal device 100 further includes two clamping structures 8, both of which are disposed on the rotary drive device 3, and one of the two clamping structures 8 is used to clamp the thrombus-cutting tube 201 and the other is used to clamp the inner tube 1.

[0045] Furthermore, such as Figure 5 As shown, the clamping structure 8 includes a first connecting part 801, a second connecting part 802, a sealing block 803, and a top block 804. The first connecting part 801 is provided with an internal thread, and the second connecting part 802 is provided with an external thread. The second connecting part 802 extends into the first connecting part 801, and the external thread of the second connecting part 802 is threadedly connected to the internal thread of the first connecting part 801. Both ends of the sealing block 803 are tapered structures 805, and the two ends of the sealing block 803 are symmetrical to each other. The top block 804 is disposed inside the first connecting part 801. The second connecting part 802 is provided with an installation groove, and the sealing block 803 is disposed in the installation groove. The top block 804 extends into the installation groove. The top block 804 and the bottom end of the installation groove are provided with tapered grooves that match the tapered structures 805. The two tapered structures 805 are respectively disposed in the two tapered grooves.

[0046] Currently, disposable tubing used in thrombus removal devices is typically fixed with glue, making it impossible to replace and resulting in the entire device being usable only once, leading to low utilization. The thrombus removal device 100 provided by this invention uses a clamping structure 8 to secure the disposable tubing (thrombus-cutting tube 201 and inner tube 1). After use, the used disposable tubing can be removed by rotating the first connecting part 801 and the second connecting part 802 relative to each other. After replacing with a new tubing, rotating the first connecting part 801 and the second connecting part 802 in the opposite direction secures the new disposable tubing. This clamping structure allows for the replacement of disposable tubing in the thrombus removal device, effectively improving its utilization rate.

[0047] When the thrombus removal device 100 provided by the present invention cuts and breaks up thrombi, the removal structure 2 and the inner tube 1 are fitted inside the main tube 501. When aspiration is required, the removal structure 2 and the inner tube 1 are pulled out of the main tube 501 as a whole. The purpose of pulling the removal structure 2 and the inner tube 1 out of the main tube 501 as a whole is to maximize the internal space of the main tube 501 and prevent the removal structure 2 and the inner tube 1 from occupying the internal space of the main tube 501, which could easily cause blockage inside the main tube 501 during aspiration. This effectively improves the aspiration effect.

[0048] like Figures 6-8As shown, the pipe fittings include a multi-lumen fitting 13 and a single-lumen fitting 14. The multi-lumen fitting 13 has multiple cavities 15 arranged side by side inside, while the single-lumen fitting 14 has only one cavity 15. Compared to the single-lumen fitting 14, with a fixed outer diameter, the minimum effective width A that the internal cavity of the multi-lumen fitting 13 can achieve is necessarily smaller than the minimum effective width A that the internal cavity of the single-lumen fitting 14 can achieve when other fittings are inserted inside compared to when no other fittings are inserted inside. It should be noted that relevant experiments and studies have found that when the outer diameter of the fitting is constant, the larger the minimum effective width of the internal cavity of the fitting, the better the suction effect. Moreover, this parameter is very sensitive, and a slight change in the minimum effective width of the internal cavity will greatly affect the suction ability of the thrombus. Based on this, when suction is required, the present invention will remove the entire cleaning structure 2 and inner tube 1 from the main tube 501.

[0049] Furthermore, the second connecting part 802 of the clamping structure 8 for clamping the cut-off pipe 201 is provided on the rotating shaft 302 of the rotary drive device 3. The cut-off pipe 201 passes through the main pipe 501, the sealing sleeve 504, the first connecting part 801, the top block 804, the sealing block 803, the second connecting part 802, and the rotating shaft 302 of the rotary drive device 3 in sequence. The first connecting part 801 of the clamping structure 8 for clamping the inner pipe 1 is provided on the rotary drive device 3, and the second connecting part 802 is provided on the connecting joint 11. The inner pipe 1 passes through the rotating shaft 302 of the rotary drive device 3, the outer shell 301 of the rotary drive device 3, the first connecting part 801, the top block 804, the sealing block 803, and the second connecting part 802 in sequence. It should be noted that the clamping structure 8 used to clamp the cut pipe 201 can also have the second connecting part 802 set on the sealing sleeve 504, and the clamping structure 8 used to clamp the inner pipe 1 can also have the first connecting part 801 set on the connecting joint 11 and the second connecting part 802 set on the rotary drive device 3.

[0050] The clamping principle of the clamping structure 8 is based on the tightening of the threads. The taper converts the horizontal movement of the threads into a vertical force on the sealing block 803, thereby causing the sealing block 803 to clamp the middle cut-bolt tube 201 or inner tube 1. Conversely, when it is necessary to disassemble the cut-bolt tube 201 or inner tube 1, simply loosen the threads and then pull out the cut-bolt tube 201 or inner tube 1.

[0051] Furthermore, the sealing block 803 is specifically made of rubber, and the connecting joint 11 is specifically made of Luer joint.

[0052] In this embodiment, a sealing sleeve 504 is provided at the end of the main pipe 501 away from the sliding sleeve 203. The sealing sleeve 504 is recessed towards the end closer to the sliding sleeve 203, and a slit 5041 for the cutting pipe 201 and the inner pipe 1 to pass through is provided at the center of the sealing sleeve 504. The sealing sleeve 504 is specifically a silicone sleeve or a rubber sleeve. By making the sealing sleeve 504 recessed towards the end closer to the sliding sleeve 203, the slit 5041 can achieve self-sealing whether the cutting pipe 201 is passed through or not.

[0053] In this embodiment, as Figure 9 As shown, slit 5041 has a cross-shaped structure. It should be noted that slit 5041 is not limited to a cross shape, but can also have other shapes that allow the clearing structure 2 to pass through.

[0054] In this embodiment, to facilitate the passage of the thrombectomy basket 202 through the slit 5041, the thrombus removal device 100 further includes an auxiliary tube 12 for assisting the thrombectomy basket 202 in passing through the slit 5041. In actual use, when the thrombectomy basket 202 needs to pass through the slit 5041, the auxiliary tube 12 is first passed through the slit 5041, then the thrombectomy basket 202 is passed through the auxiliary tube 12. After the thrombectomy basket 202 has passed through the auxiliary tube 12, the auxiliary tube 12 is pulled out from the slit 5041. This method achieves the passage of the thrombectomy basket 202 through the slit 5041.

[0055] In this embodiment, as Figure 3 As shown, a first valve 505 for opening or closing the first branch pipe 502 is provided on the first branch pipe 502, and a second valve 506 for opening or closing the second branch pipe 503 is provided on the second branch pipe 503.

[0056] In this embodiment, as Figure 10 As shown, the rotary drive device 3 includes a housing 301, a rotating shaft 302, a reduction gear set 303, and a motor 304. The rotating shaft 302 is rotatably mounted on the housing 301. The first end of the rotating shaft 302 is connected to the reduction gear set 303, which is connected to the motor 304. The reduction gear set 303 is used to reduce the output speed of the motor 304 and transmit the reduced speed to the rotating shaft 302. The second end of the rotating shaft 302 is connected to the bolt cutter 201 to drive the bolt cutter 201 to rotate.

[0057] The specific structure of the reduction gear set 303 is existing technology and will not be described in detail here. By adjusting the reduction ratio of the reduction gear set 303, the rotation speed of the entire thrombectomy tube 201 can be controlled within a suitable range, thereby preventing the risk of damage to the venous valves due to excessive rotation speed of the thrombectomy basket 2022.

[0058] In practical use, based on the vessel diameter obtained from angiography at the thrombus end of the patient, a suitable constant-temperature water bath temperature (appropriate rotation of the thrombectomizing basket 202) and a suitable thrombectomizing speed are selected for the thrombolytic drug. The specific selection process involves obtaining the diameter of the thrombectomizing basket 202 under different operating conditions (different water bath temperatures, different rotation speeds) through in vitro experiments. An optimal operating condition table suitable for a specific diameter is then created, and a corresponding table of vessel diameters and operating condition selections is constructed. The optimal operating condition can be directly obtained based on the vessel diameter.

[0059] In specific experiments, two different rotation speeds (first speed and second speed) are generally selected, along with two deformation temperatures (first temperature and second temperature) for the double-pass shape memory alloy. The optimal condition for a certain blood vessel diameter is then selected from these four conditions.

[0060] In this embodiment, the thrombectomy basket 202 is provided with contrast points. Using equipment such as DSA (Digital Subtraction Angiography), the diameter of the cutting basket can be measured, thereby establishing the most suitable vascular condition table. Furthermore, contrast points are formed by applying contrast-enhancing material to the thrombectomy basket 202.

[0061] It should be noted that the clamping structure 8 provided by the present invention can be used alone, and the clamping structure 8 provided by the present invention is not limited to clamping the cut-off pipe 201 and the inner pipe 1, but can also be used to clamp other pipe fittings, such as... Figure 5 As shown, the clamping structure specifically includes a first connecting part 801, a second connecting part 802, a sealing block 803, and a top block 804. The first connecting part 801 is provided with an internal thread, and the second connecting part 802 is provided with an external thread. The second connecting part 802 extends into the first connecting part 801, and the external thread of the second connecting part 802 is threadedly connected to the internal thread of the first connecting part 801. Both ends of the sealing block 803 are tapered structures 805, and the two ends of the sealing block 803 are symmetrical to each other. The top block 804 is disposed inside the first connecting part 801. The second connecting part 802 is provided with an installation groove. The sealing block 803 is disposed in the installation groove, and the top block 804 extends into the installation groove. The top block 804 and the bottom end of the installation groove are provided with tapered grooves that match the tapered structures 805. The two tapered structures 805 are respectively disposed in the two tapered grooves.

[0062] Furthermore, the sealing block 803 is specifically made of rubber.

[0063] Furthermore, the pipe passes through the first connecting part 801, the top block 804, the sealing block 803 and the second connecting part 802 in sequence, and the pipe, the first connecting part 801, the top block 804, the sealing block 803 and the second connecting part 802 are coaxially arranged.

[0064] Currently, tubing, such as disposable tubing used in thrombus removal devices, is often fixed with adhesive, making it impossible to replace. When a tubing needs replacement, the entire device (the entire thrombus removal device) must be replaced, resulting in low device utilization. However, by using the clamping structure 8 provided in this invention to fix the tubing, when a tubing needs replacement, simply rotating the first connecting part 801 and the second connecting part 802 relative to each other allows for easy removal of the old tubing. After inserting the new tubing, rotating the first connecting part 801 and the second connecting part 802 relative to each other in opposite directions secures the new tubing. This clamping structure 8 allows for convenient and quick tubing replacement, effectively avoiding the need to replace the entire device due to the inability to replace a single tubing, thus significantly improving device utilization.

[0065] In addition, during actual use, when it is necessary to fix the pipe fitting to a certain structure, the first connecting part 801 or the second connecting part 802 can be fixed to the structure.

[0066] The clamping principle of the clamping structure 8 is based on the tightening of the threads. The taper converts the horizontal movement of the threads into a vertical force on the sealing block 803, thereby causing the sealing block 803 to clamp the pipe fitting in the middle. Conversely, when it is necessary to disassemble the pipe fitting, simply loosen the threads and then pull the pipe fitting out.

[0067] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A thrombectomy device, comprising: The utility model relates to a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure.

2. The thrombectomy device of claim 1, wherein, The utility model discloses a double-layer catheter, a connecting body and a blocking structure.

3. The thrombectomy device of claim 1, wherein, The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure.

4. The thrombectomy device of claim 3, wherein, The utility model discloses a double-layer catheter, a connecting body and a blocking structure.

5. The thrombectomy device of claim 4, wherein, The utility model discloses a double-layer catheter, a connecting body and a blocking structure.

6. The thrombectomy device of claim 3, wherein, The utility model discloses a double-layer catheter, a connecting body and a blocking structure.

7. The thrombectomy device of claim 6, wherein, The utility model discloses a double-layer catheter, a connecting body and a blocking structure.

8. The thrombectomy device of claim 6, wherein, The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. 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The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and a blocking structure. The utility model discloses a double-layer catheter, a connecting body and 9. The thrombectomy device of claim 3, wherein, The first branch pipe is provided with a first valve for opening or closing the first branch pipe, and the second branch pipe is provided with a second valve for opening or closing the second branch pipe.

10. The thrombectomy device of claim 1, wherein, The rotating driving device comprises a housing, a rotating shaft, a speed reduction gear set and a motor. The rotating shaft is rotatably arranged on the housing. The first end of the rotating shaft is connected with the speed reduction gear set. The speed reduction gear set is connected with the motor. The speed reduction gear set is used for reducing the output rotating speed of the motor and transmitting the reduced rotating speed to the rotating shaft. The second end of the rotating shaft is connected with the cutting bolt pipe to drive the cutting bolt pipe to rotate.

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