Minimally invasive artery thrombectomy device and control method thereof

Abstract

The invention provides a minimally invasive artery thrombectomy device and a control method thereof, and relates to the technical field of medical instruments, the thrombectomy device comprises a handle and a catheter installed on the handle, and a thrombectomy assembly is arranged at the free end of the catheter. The thrombus taking assembly comprises a net cage, extrusion plates fixed to the two ends of the net cage, a guide head fixed to the extrusion plate at the front end of the net cage and an air bag seat movably connected with the extrusion plate at the rear end of the net cage, and a guide rod is arranged between the extrusion plate at the front end of the net cage and the air bag seat and fixedly connected with the extrusion plate at the front end of the net cage. The rear end of the guide rod penetrates through the extrusion plate at the rear end of the mesh cage and then is fixedly connected with an air bag seat, the rear end of the guide rod is in sliding fit with the extrusion plate at the rear end of the mesh cage, and an air bag is arranged in the air bag seat and connected with an air pump. The thrombus grasping device is simple in processing technology, adjustable in clamping force and capable of accurately positioning, stably grasping thrombus and synchronously feeding medicine to promote vascular repair, and operation safety and effectiveness are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a minimally invasive arterial thrombectomy device and a control method thereof. Background Art

[0002] A thrombectomy device is a device used to treat vascular diseases, primarily vascular embolism. Its key feature is that it can be implanted via an intravascular interventional procedure, avoiding the trauma of traditional surgery and reducing surgical risks and recovery time. Currently, third-generation thrombectomies primarily consist of a stent and a guidewire. The stent is constructed from a mesh of titanium alloy wire, offering excellent flexibility and elasticity. However, the alloy mesh has a dense grid structure and is compact. Laser cutting is currently used for this process, which places high demands on precision and surface smoothness. This makes the process difficult and expensive, making it unsuitable for widespread use. Furthermore, the clamping force of the alloy mesh cannot be flexibly adjusted to suit different vascular conditions and thrombus characteristics. In actual clinical practice, patients vary in vascular structure, thrombus morphology, and hardness. A single, fixed thrombectomy device is difficult to adapt to these complex situations. For example, the device lacks an effective adaptive adjustment mechanism for clots of varying hardness and shape, potentially preventing stable and reliable capture, thus compromising thrombectomy effectiveness.

[0003] Therefore, we have made improvements to this problem and proposed a minimally invasive arterial thrombectomy device with a simple processing technology and adjustable clamping force. Summary of the Invention

[0004] The purpose of the present invention is to provide a minimally invasive arterial thrombectomy device with a novel structure that has low processing difficulty and adjustable clamping force, and a control method thereof.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following minimally invasive arterial thrombus remover to improve the above-mentioned problem.

[0006] A minimally invasive arterial thrombectomy device comprises a handle 1 and a catheter 2 mounted on the handle 1. The device is special in that a thrombectomy assembly 3 is provided at the free end of the catheter 2. The thrombectomy assembly 3 comprises a mesh cage 303, extrusion plates 302 fixed at both ends of the mesh cage 303, a guide head 301 fixed on the extrusion plate 302 at the front end of the mesh cage, and an airbag seat 306 movably connected to the extrusion plate 302 at the rear end of the mesh cage 303. A guide rod 304 is provided between the extrusion plate 302 at the front end of the mesh cage 303 and the airbag seat 306. The guide rod 304 is fixedly connected to the extrusion plate 302 at the front end of the mesh cage 303. The rear end of the guide rod 304 passes through the extrusion plate 302 at the rear end of the mesh cage 303 and is fixedly connected to the airbag seat 306. The rear end of the guide rod 304 slides with the extrusion plate 302 at the rear end of the mesh cage 303. An airbag is provided in the airbag seat 306, and the airbag is connected to an air pump.

[0007] Preferably, the mesh cage 303 is composed of at least three spring-shaped elastic titanium wires evenly distributed between the two extrusion plates 302 .

[0008] Preferably, a gas pipeline for inflating the airbag is provided inside the catheter 2, one end of the gas pipeline is connected to the airbag, and the other end is connected to the air pump, and a gas flow meter is provided on the gas pipeline.

[0009] Preferably, the minimally invasive arterial thrombectomy device also includes a drug delivery mechanism, which includes a drug delivery hole 305 arranged at the front end of the guide head 301, a third drug delivery passage 309 and an axial second drug delivery passage 307 arranged inside the guide head 301, a fourth drug delivery passage arranged inside the guide rod 304, and a first drug delivery passage arranged inside the catheter 2, the end of the third drug delivery passage 309 is connected to the drug delivery hole, and the plane formed by the third drug delivery passage 309 is perpendicular to the second drug delivery passage 307; the first drug delivery passage inside the catheter 2 is sequentially connected to the fourth drug delivery passage, the second drug delivery passage 307, the third drug delivery passage 309, and the drug delivery hole 305 in the guide rod 304.

[0010] Preferably, a drug administration protection net 315 is fixed at an outer position of the drug administration hole 305 .

[0011] Preferably, the drug administration mechanism further includes a syringe, and a drug administration branch 21 is provided on the catheter 2 , and the syringe is connected to the drug administration branch 21 on the catheter 2 .

[0012] Preferably, an ultrasonic sensor 308 and a control system matched therewith are provided at the front end of the guide head 301 .

[0013] Preferably, a wireless cardiovascular blood flow parameter detection sensor is also provided at the front end of the guide head 301 .

[0014] Preferably, the outer surface of the catheter 2 has threads.

[0015] Preferably, the guide head 301 is in the shape of a truncated cone.

[0016] The present invention also provides a control method for a minimally invasive arterial thrombus remover, comprising the following steps: (1) Initial parameter setting: Before the operation, the corresponding relationship data of the balloon inflation volume, balloon deformation, cage deformation and clamping force are pre-set according to the conventional parameter range of different patients' blood vessels and common thrombosis characteristics, and stored in the data processing unit; at the same time, the ultrasonic sensor and wireless cardiovascular blood flow parameter detection sensor are calibrated to ensure the accuracy of their measurement data; (2) Real-time data collection: When the thrombus remover enters the blood vessel, the ultrasonic sensor collects information on the location of the thrombus, the shape of the blood vessel, the degree of curvature of the blood vessel, the change in thickness, and whether there is a stenosis in real time, and transmits this data to the data processing unit; Wireless cardiovascular blood flow parameter detection sensors measure parameters such as blood pressure, flow rate and temperature in real time and transmit the data to the data processing unit; (3) Data analysis and processing: The data processing unit receives data transmitted by the ultrasonic sensor and / or the wireless cardiovascular blood flow parameter detection sensor, and obtains the specific situation of the current vascular thrombus, including the size, hardness, location of the thrombus, and the reference index of the elasticity and stenosis of the blood vessel. At the same time, the health status of the blood vessel is judged based on the real-time blood parameters; (4) Inflation control decision: Based on the results of data analysis and processing, the data processing unit determines the optimal inflation volume to be filled into the airbag according to the pre-set correspondence data between the airbag inflation volume and the airbag deformation, the cage deformation, and the clamping force, and generates the corresponding inflation control instructions; (5) Airbag inflation control: The data processing unit sends the inflation control command to the air pump. The air pump fills the airbag with a set amount of gas according to the command, so that the extrusion plate fixed at the rear end of the mesh cage is lifted up by the airbag. The two extrusion plates move relative to each other to compress the mesh cage, and the mesh cage gradually expands to the required diameter. The two extrusion plates and the mesh cage work together to block the thrombus. (6) Dynamic monitoring and adjustment: During the thrombectomy process, data from the ultrasonic sensor and / or wireless cardiovascular blood flow parameter detection sensor is continuously collected in real time and fed back to the data processing unit. The data processing unit determines whether the current thrombectomy status meets expectations based on the new data. If there is a deviation, such as the thrombus hardness not meeting expectations resulting in insufficient or excessive clamping force, the data processing unit recalculates and adjusts the airbag inflation volume, generates the inflation control command again and sends it to the air pump, and dynamically adjusts the airbag inflation volume to ensure the stability and safety of the thrombectomy process.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) Simple processing technology and reduced cost: The mesh cage of the present invention is composed of at least three spring-shaped elastic titanium wires evenly distributed between two extrusion plates. The processing technology of this structure is relatively simple, which reduces the processing difficulty and cost and is more conducive to widespread promotion and use.

[0018] (2) Adjustable clamping force and strong adaptability: The clamping force of the alloy wire mesh of existing thrombus removers cannot be flexibly adjusted according to different vascular conditions and thrombus characteristics, making it difficult to adapt to the different vascular structures and thrombus shapes, hardness and softness of patients. The thrombus remover of the present invention injects gas into the airbag, so that the extrusion plate fixed to the rear end of the mesh cage is lifted by the airbag. The relative movement of the two extrusion plates compresses the mesh cage, thereby clamping the thrombus. Doctors can precisely control the amount of gas entering the airbag, and then control the deformation and clamping force of the mesh cage to adapt to thrombi of different hardness and shapes, achieving stable and reliable grasping and greatly improving the thrombus removal effect.

[0019] (3) The catheter design is safe and reliable: The outer surface of the catheter has threads. When the diameter of the blood vessel is small, the catheter will not block the blood vessel when inserted. The threads provide a path for blood to pass through, ensuring the safety of the product in the blood vessel and reducing surgical risks.

[0020] (4) Reasonable design of the guide head: The guide head is in the shape of a frustum, which makes it easy to advance in blood vessels with thrombus without damaging the inner wall of the blood vessels, thus ensuring the protection of the blood vessels during the operation.

[0021] (5) The drug delivery function is perfect and the drug delivery path is clear: a complete drug delivery path is formed by the drug delivery hole set at the front end of the guide head, the cross-shaped third drug delivery path and the axial second drug delivery path inside the guide head, the fourth drug delivery path inside the guide rod and the first drug delivery path inside the catheter, which can accurately deliver the drug to the lesion part.

[0022] (6) Effective drug administration protection: A drug administration protection net is fixed on the outer side of the drug administration hole, which can ensure that the drug is accurately sprayed on the blood vessels around the thrombus site, while preventing thrombus debris from entering the drug administration hole and causing blockage. During the thrombus removal process, blood vessels can be repaired simultaneously, promoting rapid recovery of blood vessels after thrombus removal and reducing the occurrence of postoperative complications.

[0023] (7) Ultrasonic sensor assisted positioning: An ultrasonic sensor and its matching control system are set at the front end of the guide head. The ultrasonic sensor developed by Philips of the Netherlands can be placed in the blood vessel to sense the location of the thrombus, the shape of the blood vessel and other information. At the same time, it can distinguish the degree of curvature of the blood vessel, the change in thickness and whether there are narrow parts, etc., to assist doctors in determining the best guide path and direction. When approaching the thrombus, the control system controls the inflation volume of the airbag, so that the extrusion plates move relative to each other, and the mesh cage gradually expands to the required diameter. The two extrusion plates and the mesh cage work together to clamp the thrombus, ensuring the accuracy and safety of the thrombus removal process.

[0024] (8) Blood flow parameter detection to ensure safety: A wireless cardiovascular blood flow parameter detection sensor is also installed at the front end of the guide head, which can measure blood pressure, flow rate and temperature in real time, ensuring timely feedback of vascular blood parameters during thrombectomy. Once the data is abnormal, remedial measures can be taken in time, providing a solution for continuous monitoring of the patient's hemodynamics and further ensuring the safety of the operation.

[0025] (9) The overall structural design is reasonable and the thrombus removal effect is significant: through the synergistic effect of the extrusion plate and the mesh cage, it can adapt to blood vessels of different diameters and adjust to capture different thrombi, thereby reducing the risk of thrombus shedding. The guide rod provides a stable guide for the movement of the thrombus removal component, ensuring that the thrombus removal operation can be carried out smoothly in a complex vascular environment, avoiding deviations and accidents, improving the efficiency and success rate of thrombus capture, and achieving the effect of precise positioning of thrombi, stable capture, and synchronous vascular repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the overall structure of the minimally invasive arterial thrombectomy device provided in this application; Figure 2 A schematic diagram of the structure of the thrombectomy component of the minimally invasive arterial thrombectomy device provided in this application; Figure 3 The minimally invasive arterial thrombectomy device provided in this application Figure 2 A in the middle is an enlarged structural diagram; Figure 4 Schematic diagram of the explosion of the thrombectomy component of the minimally invasive arterial thrombectomy device provided in this application; Figure 5 Schematic diagram of the control system control principle of the minimally invasive arterial thrombectomy device provided in this application; Indicated in the figure: 1. Handle; 2. Catheter; 21. Drug delivery branch; 3. Thrombectomy assembly; 301. Guide head; 302. Extrusion plate; 303. Mesh cage; 304. Guide rod; 305. Drug delivery hole; 306. Airbag seat; 307. Second drug delivery channel; 308. Ultrasonic sensor; 309. Third drug delivery channel; 315. Drug delivery protection net. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0028] Example 1

[0029] The present invention provides a minimally invasive arterial thrombus remover with a simple processing technology, a sophisticated structure, and the ability to self-adapt and stably and reliably capture thrombi.

[0030] Specifically, please refer to Figure 1-Figure 4 The minimally invasive arterial thrombectomy device comprises a handle 1 and a catheter 2 mounted on the handle 1. Figure 1 The length of the middle catheter is omitted. A thrombus removal assembly 3 is provided at the free end of the catheter 2. The thrombus removal assembly 3 includes a mesh cage 303, extrusion plates 302 fixed at both ends of the mesh cage 303, a guide head 301 fixed on the extrusion plate 302 at the front end of the mesh cage, and an airbag seat 306 movably connected to the extrusion plate 302 at the rear end of the mesh cage 303. A guide rod 304 is provided between the extrusion plate 302 at the front end of the mesh cage 303 and the airbag seat 306. The guide rod 304 is fixedly connected to the extrusion plate 302 at the front end of the mesh cage 303. The rear end of the guide rod 304 passes through the extrusion plate 302 at the rear end of the mesh cage 303 and is fixedly connected to the airbag seat 306. The rear end of the guide rod 304 slides with the extrusion plate 302 at the rear end of the mesh cage 303. An airbag is provided in the airbag seat 306. The airbag is not shown and is connected to an air pump.

[0031] The mesh cage 303 is composed of at least three spring-like elastic titanium wires evenly distributed between the two extrusion plates 302. These wires provide uniform support for the two extrusion plates. When gas is injected into the airbag, the extrusion plate 302, fixed to the rear end of the mesh cage 303, is lifted by the airbag, causing the two extrusion plates to move relative to each other, compressing the mesh cage 303 and clamping the clot. The mesh cage 303 utilizes multiple elastic titanium wires, rather than a single spring. A single spring would only have a single point of contact between its ends and the extrusion plate, preventing balanced force. Multiple elastic titanium wires, however, provide multi-point force distribution, resulting in a more balanced extrusion force.

[0032] Preferably, the outer surface of the catheter 2 has threads. When the diameter of the blood vessel is small, the insertion of the catheter 2 will not block the blood vessel. The threads provide a passage for blood to pass through, making the product safer and more reliable.

[0033] Preferably, the guide head 301 is in the shape of a truncated cone, which facilitates advancement in a blood vessel with a thrombus without damaging the inner wall of the blood vessel.

[0034] Preferably, the interior of the catheter 2 is equipped with a gas line for inflating the airbag. One end of the gas line is connected to the airbag, and the other end is connected to an air pump. A gas flowmeter is installed on the gas line to precisely control the amount of gas entering the airbag. The airbag is made of elastic material, and by controlling the airbag's deformation, the cage's deformation and clamping force are controlled. Before surgery, the surgeon needs to understand the relationship between the gas volume, the airbag's deformation, and the cage's deformation in advance to save surgical time.

[0035] Preferably, the minimally invasive arterial thrombectomy device further includes a drug delivery mechanism, which includes a drug delivery hole 305 disposed at the front end of the guide head 301, a cross-shaped third drug delivery passage 309 and an axial second drug delivery passage 307 disposed within the guide head 301, a fourth drug delivery passage disposed within the guide rod 304, and a first drug delivery passage disposed within the catheter 2. The distal end of the third drug delivery passage 309 is connected to the drug delivery hole, and the plane formed by the cross-shaped third drug delivery passage 309 is perpendicular to the second drug delivery passage 307. The first drug delivery passage within the catheter 2 is sequentially connected to the fourth drug delivery passage, the second drug delivery passage 307, the third drug delivery passage 309, and the drug delivery hole 305 within the guide rod 304 to deliver the drug to the lesion, thereby achieving drug delivery. The third drug delivery passage may also have other shapes.

[0036] Preferably, a drug delivery protection net 315 is fixed outside the drug delivery hole 305. The drug delivery protection net 315 ensures that the drug is accurately sprayed on the blood vessels around the thrombus site, while preventing thrombus debris from entering the drug delivery hole and causing blockage. In this way, blood vessel repair can be carried out simultaneously during the thrombus removal process, promoting rapid recovery of the blood vessels after thrombus removal and reducing the occurrence of post-operative complications.

[0037] More preferably, the drug delivery mechanism further comprises a syringe, and a drug delivery branch 21 is provided on the catheter 2, the syringe being in communication with the drug delivery branch 21 on the catheter 2. The drug enters the first drug delivery channel within the catheter 2 through the syringe, then passes sequentially through the guide rod 304, the second drug delivery channel 307, and the third drug delivery channel 309 to reach the drug delivery hole 305. Finally, the drug is delivered to the blood vessels surrounding the thrombus through the drug delivery protection net 315 located outside the drug delivery hole, thereby achieving real-time drug delivery to the blood vessels during the return path after the thrombus is removed, thereby greatly improving the safety and effectiveness of the procedure.

[0038] In summary, the minimally invasive arterial thrombectomy device of this embodiment achieves the effects of stable capture of thrombus and simultaneous blood vessel repair through structural design.

[0039] Example 2

[0040] In this embodiment, based on the first embodiment, an ultrasonic sensor 308 and a control system matched therewith are provided at the front end of the guide head 301 at the thrombus removal assembly to guide the guide head 301 and facilitate thrombus removal.

[0041] Philips of the Netherlands has developed an ultrasonic sensor 308 that is only 1 mm in size. It can be placed in a blood vessel to sense information such as the location of the thrombus and the shape of the blood vessel. At the same time, it can distinguish the degree of curvature of the blood vessel, changes in thickness, and whether there are stenosis areas, thereby assisting doctors in determining the best guidance path and direction. When approaching a thrombus, the control system controls the inflation volume of the airbag, causing the extrusion plate 302 to move relative to it, so that the cage 303 gradually expands to the required diameter. The two extrusion plates 302 and the cage 303 work together to block the thrombus, ensuring the accuracy and safety of the thrombus removal process.

[0042] Preferably, a wireless cardiovascular blood flow parameter detection sensor is also located at the front end of the guide head 301. This sensor was jointly developed by Professor John A. Rogers of the Querry Simpson Institute for Bioelectronics at Northwestern University and Professor Kyeongha Kwon of the School of Electrical Engineering at the Korea Advanced Institute of Science and Technology. This sensor can measure blood pressure, flow rate, and temperature in real time, ensuring timely feedback on vascular blood parameters during thrombectomy. If any abnormal data is detected, remedial measures can be taken promptly, providing a solution for continuously monitoring the patient's hemodynamics.

[0043] A method for controlling a minimally invasive arterial thrombectomy device comprises the following steps: (1) Initial parameter setting: Before the operation, the corresponding relationship data of the balloon inflation volume, balloon deformation, cage deformation and clamping force are pre-set according to the conventional parameter range of different patients' blood vessels and common thrombosis characteristics, and stored in the data processing unit; at the same time, the ultrasonic sensor and wireless cardiovascular blood flow parameter detection sensor are calibrated to ensure the accuracy of their measurement data; (2) Real-time data collection: When the thrombus remover enters the blood vessel, the ultrasonic sensor collects information on the location of the thrombus, the shape of the blood vessel, the degree of curvature of the blood vessel, the change in thickness, and whether there is a stenosis in real time, and transmits this data to the data processing unit; Wireless cardiovascular blood flow parameter detection sensors measure parameters such as blood pressure, flow rate and temperature in real time and transmit the data to the data processing unit; (3) Data analysis and processing: The data processing unit receives data transmitted by the ultrasonic sensor and / or the wireless cardiovascular blood flow parameter detection sensor, and obtains the specific situation of the current vascular thrombus, including the size, hardness, location of the thrombus, and the reference index of the elasticity and stenosis of the blood vessel. At the same time, the health status of the blood vessel is judged based on the real-time blood parameters; (4) Inflation control decision: Based on the results of data analysis and processing, the data processing unit determines the optimal inflation volume to be filled into the airbag according to the pre-set correspondence data between the airbag inflation volume and the airbag deformation, the cage deformation, and the clamping force, and generates the corresponding inflation control instructions; (5) Airbag inflation control: The data processing unit sends the inflation control command to the air pump. The air pump fills the airbag with a set amount of gas according to the command, so that the extrusion plate fixed at the rear end of the mesh cage is lifted up by the airbag. The two extrusion plates move relative to each other to compress the mesh cage, and the mesh cage gradually expands to the required diameter. The two extrusion plates and the mesh cage work together to block the thrombus. (6) Dynamic monitoring and adjustment: During the thrombectomy process, data from the ultrasonic sensor and / or wireless cardiovascular blood flow parameter detection sensor is continuously collected in real time and fed back to the data processing unit. The data processing unit determines whether the current thrombectomy status meets expectations based on the new data. If there is a deviation, such as the thrombus hardness not meeting expectations resulting in insufficient or excessive clamping force, the data processing unit recalculates and adjusts the airbag inflation volume, generates the inflation control command again and sends it to the air pump, and dynamically adjusts the airbag inflation volume to ensure the stability and safety of the thrombectomy process.

[0044] The working principle of the present invention is: First, the doctor uses the operating handle 1 to drive the catheter 2 installed on it to advance in the artery, and push the thrombectomy component 3 at the free end of the catheter 2 to the target position near the artery. This process requires the doctor to rely on rich experience and cooperate with the equipment to observe the direction of the blood vessels to ensure that the catheter 2 can move along the correct path.

[0045] The guide head 301 in the thrombectomy component 3 is one of the key parts of the entire device. When the guide head 301 enters the artery, the ultrasonic sensor inside it continuously collects data and transmits this data to the data processing unit for analysis. The data processing unit uses advanced algorithms to quickly process and analyze this data, and provides reference indexes such as the size, hardness, location of the thrombus, as well as the elasticity and stenosis of the blood vessels, thereby assisting the doctor in determining the best guide path and direction, and providing an accurate guidance reference for the doctor's subsequent operations. The data processing unit sends instructions to the air pump to accurately fill the airbag with gas and adjust the squeezing force of the squeezing plate 302. The design of the mesh cage 303 can better adapt to thrombi of different shapes and sizes. When the mesh cage 303 expands, it blocks the thrombus to ensure that the thrombus will not accidentally fall off during the thrombectomy process. The guide rod 304 also plays an important role in this process. It provides guidance for the thrombectomy component 3 The movement provides stable guidance, ensuring that the thrombus removal operation can be carried out smoothly in a complex vascular environment, avoiding deviations and accidents; the minimally invasive arterial thrombus remover provided by the present invention can adapt to blood vessels of different diameters for adjustment through the synergistic effect of the extrusion plate 302 and the mesh cage 303, thereby blocking different thrombi and reducing the risk of thrombus shedding. Drugs are administered simultaneously during the thrombus removal process, and the drug administration protection net 315 is used to ensure that the drugs act accurately on the blood vessels, promote rapid recovery of the blood vessels after thrombus removal, and reduce postoperative complications. Compared with the existing technology, the traditional thrombus removal device has an unstable ability to grasp thrombi and is difficult to adapt to thrombi of different sizes and shapes. The present device can be adjusted according to different thrombus conditions, thereby improving the efficiency and success rate of grasping thrombi.

[0046] In summary, the minimally invasive arterial thrombectomy device of this embodiment greatly improves the accuracy of the thrombectomy component in reaching the thrombus location through the synergistic effect of the structural design and the control system, reduces the blindness during the operation, and reduces the risk of damage to surrounding normal tissues. The control system accurately controls the extrusion force of the extrusion plate 302 to ensure that the thrombectomy component can stably clamp the thrombus, avoid the occurrence of unexpected situations such as thrombus detachment, improve the success rate and safety of thrombectomy, and achieve the effect of precise positioning of the thrombus, stable grasping and synchronous vascular repair.

[0047] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A minimally invasive arterial thrombectomy device, comprising a handle (1) and a catheter (2) mounted on the handle (1), characterized in that: The free end of the catheter (2) is provided with a thrombus removal assembly (3), the thrombus removal assembly (3) comprising a mesh cage (303), extrusion plates (302) fixed at both ends of the mesh cage (303), a guide head (301) fixed on the extrusion plate (302) at the front end of the mesh cage, an airbag seat (306) movably connected to the extrusion plate (302) at the rear end of the mesh cage (303), and an airbag seat (306) movably connected to the extrusion plate (302) at the front end of the mesh cage (303). A guide rod (304) is provided between the mesh cage (303), the guide rod (304) is fixedly connected to the extrusion plate (302) at the front end of the mesh cage (303), the rear end of the guide rod (304) passes through the extrusion plate (302) at the rear end of the mesh cage (303) and is fixedly connected to the airbag seat (306), the rear end of the guide rod (304) and the extrusion plate (302) at the rear end of the mesh cage (303) are slidably engaged, an airbag is provided in the airbag seat (306), and the airbag is connected to an air pump.

2. The minimally invasive arterial thrombectomy device according to claim 1, characterized in that: The mesh cage (303) is composed of at least three spring-shaped elastic titanium wires evenly distributed between two extrusion plates (302).

3. The minimally invasive arterial thrombectomy device according to claim 2, characterized in that: A gas pipeline for inflating the airbag is provided inside the catheter (2); one end of the gas pipeline is connected to the airbag, and the other end is connected to the air pump; a gas flow meter is provided on the gas pipeline.

4. The minimally invasive arterial thrombectomy device according to claim 3, characterized in that: The minimally invasive arterial thrombectomy device further includes a drug delivery mechanism, which includes a drug delivery hole (305) arranged at the front end of the guide head (301), a third drug delivery passage (309) and an axial second drug delivery passage (307) arranged inside the guide head (301), a fourth drug delivery passage arranged inside the guide rod (304), and a first drug delivery passage arranged inside the catheter (2), wherein the end of the third drug delivery passage (309) is connected to the drug delivery hole, and the plane formed by the third drug delivery passage (309) is perpendicular to the second drug delivery passage (307); the first drug delivery passage inside the catheter (2) is sequentially connected to the fourth drug delivery passage, the second drug delivery passage (307), the third drug delivery passage (309), and the drug delivery hole (305) in the guide rod (304).

5. The minimally invasive arterial thrombectomy device according to claim 4, characterized in that: A drug administration protection net (315) is fixed at an outer position of the drug administration hole (305).

6. The minimally invasive arterial thrombectomy device according to claim 4, characterized in that: The drug administration mechanism further comprises a syringe, and a drug administration branch (21) is provided on the catheter (2), and the syringe is in communication with the drug administration branch (21) on the catheter (2).

7. The minimally invasive arterial thrombectomy device according to claim 1, characterized in that: An ultrasonic sensor (308) is provided at the front end of the guide head (301).

8. The minimally invasive arterial thrombectomy device according to claim 1, characterized in that: A wireless cardiovascular blood flow parameter detection sensor is also provided at the front end of the guide head (301).

9. The minimally invasive arterial thrombectomy device according to claim 1, characterized in that: The outer surface of the catheter (2) has threads.

10. A method for controlling a minimally invasive arterial thrombectomy device, characterized in that: The following steps are involved: (1) Initial parameter setting; (2) Real-time data acquisition using ultrasonic sensors and / or wireless cardiovascular blood flow parameter detection sensors; (3) Data analysis and processing to generate airbag inflation control decisions; (4) Air pump inflation control airbag; (5) Dynamic monitoring and adjustment: Dynamic adjustment of the airbag inflation volume.

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