Device for removing vascular atherosclerosis calcified thrombus

Abstract

The invention provides a clearing device for vascular atherosclerosis calcified thrombus, and belongs to the technical field of medical devices. The cleaning device comprises a guide wire, a guide pipe is arranged on the outer wall of the guide wire, two cleaning pipes are arranged between the outer wall of the guide wire and the guide pipe, and an expansion net is installed between the two cleaning pipes. And the expansion mechanism is positioned on the net-shaped nodes of the expansion net. The expansion mechanism is matched with the driving mechanism and other parts, nodes on the expansion net are pushed to drive the expansion net to contract and expand, repeated mechanical acting force can be generated on thrombus through contraction and expansion of the expansion net, and when the expansion net expands in the dragging process, the expansion net is in close contact with the thrombus and wraps a thrombus block, so that the thrombus is prevented from being damaged. Meanwhile, the expanded expansion net can be tightly attached to the blood vessel wall in the dragging process, so that the thrombus scraping effect is achieved, the thrombus is prevented from being left in the clearing process, and the thrombus clearing effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically, to a device for removing atherosclerotic calcified thrombus. Background Art

[0002] Atherosclerosis refers to the deposition of lipid and other blood components, the proliferation of smooth muscle cells, and the increase of collagen fibers in the arterial intima, forming a porridge-like lipid necrosis lesion and vascular wall sclerosis. The formation process of atherosclerosis includes three steps: ① the proliferation of smooth muscle cells, monocytes (possibly including lymphocytes); ② the synthesis and secretion of connective tissue components by smooth muscle cells, including elastin, collagen, and proteoglycans; ③ the accumulation of lipids, mainly free cholesterol and cholesterol esters.

[0003] Myocardial infarction caused by coronary atherosclerosis and cerebral infarction caused by cerebral atherosclerosis are the most harmful to humans and are cardiovascular diseases with the highest mortality rate.

[0004] In the treatment of atherosclerosis, the prior art first moves the blocked thrombus to the end of the catheter through an expansion net, and then extracts it from the patient's blood vessel through the catheter. Since thrombus also adheres to the inner wall of the patient's blood vessel, it is difficult for the prior art to completely remove the thrombus adhering to the inner wall of the blood vessel, and the thrombus removal effect is poor. Therefore, we provide a device for removing atherosclerotic calcified thrombus to solve the above problems. Summary of the Invention

[0005] Aiming at the problems in the prior art, the purpose of the present invention is to provide a device for removing atherosclerotic calcified thrombus.

[0006] To solve the above problems, the present invention adopts the following technical solutions:

[0007] A device for removing atherosclerotic calcified thrombus, comprising:

[0008] A guide wire, on the outer wall of which a catheter is provided, and a cleaning tube is arranged between the outer wall of the guide wire and the catheter. The cleaning tubes are arranged longitudinally, and expansion nets are installed between the cleaning tubes;

[0009] An expansion mechanism, located at the mesh nodes of the expansion net, for pushing the expansion net to expand and contract;

[0010] A driving mechanism, arranged inside the catheter, for cooperating with the expansion mechanism to operate;

[0011] A suction assembly, located inside the expansion net, for cooperating with the expansion mechanism to form suction on the thrombus.

[0012] Optionally, the expansion mechanism includes connection blocks fixedly connected to the mesh nodes of the expansion net. There are multiple groups of the connection blocks, and each group has multiple connection blocks. The multiple connection blocks are evenly distributed around the expansion net nodes at equal distances.

[0013] Optionally, the driving mechanism includes a first fixed sleeve fixed inside one of the cleaning pipes. A conveying groove is formed inside the first fixed sleeve, a pressure groove is formed inside the first fixed sleeve, a through groove is formed at the bottom of the pressure groove, and the conveying groove is communicated with the pressure groove through the through groove. A spherical rod is slidably connected inside the cleaning pipe, and a first piston block is fixedly connected to the end of the spherical rod. An elastic block is installed between the first piston block and the pressure groove. A pushing component for pushing the connection block is arranged at the bottom of the first fixed sleeve.

[0014] Optionally, the pushing component includes an air delivery ring fixedly connected to the bottom of the first fixed sleeve. A plurality of air guiding grooves are formed at the top of the air delivery ring. The plurality of air guiding grooves are respectively communicated with one of the conveying grooves, and the air guiding grooves are communicated with the inside of the air delivery ring.

[0015] Optionally, the pushing component further includes a plurality of second fixed sleeves fixedly connected to the inside of the air delivery ring. A connecting rod is slidably connected inside each second fixed sleeve. One end of the connecting rod is fixedly connected to a second piston block, and one end of the connecting rod penetrates through the outer wall of the air delivery ring and is fixedly connected to the connection block.

[0016] Optionally, the driving mechanism further includes a plurality of abutting blocks fixedly connected to the inside of the conduit. The abutting blocks are arranged in an array inside the conduit, and the abutting blocks are trapezoidal.

[0017] Optionally, the suction assembly includes two third fixed sleeves fixedly connected to the inside of the connection block. The two third fixed sleeves are symmetrically arranged with the center of the connection block as the axis of symmetry. A drainage groove is formed inside the third fixed sleeve, and the drainage groove is communicated with the inside of the connection block.

[0018] Optionally, the suction assembly further includes a third piston block slidably connected to the inside of the third fixed sleeve. A fixed rod is fixedly connected to the side wall of the third piston block. One end of the fixed rod penetrates through the outer wall of the connection block and is fixedly connected to the outer wall of the air delivery ring. A conveying assembly for conveying thrombus is arranged at one end of the third fixed sleeve.

[0019] Optionally, the conveying component includes a drainage bin fixedly connected to one end of the third fixed sleeve. A plurality of guiding rings are fixedly connected inside the drainage bin. The guiding rings are distributed in a stepped manner inside the drainage bin, and the plurality of guiding rings are inclined towards the inner side of the drainage bin. Two input ports are opened inside the connecting block, and one end of each input port is provided with a sealing unit for closing the input port.

[0020] Optionally, the sealing unit includes a sealing film installed inside the input port. The sealing film is connected to the input end of the drainage bin, and the sealing film is composed of four elastic film pieces.

[0021] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0022] In the above solution, by setting parts such as the expansion mechanism and the driving mechanism, the nodes on the expansion net are pushed to drive the expansion net to contract and expand. Through the contraction and expansion of the expansion net, repeated mechanical forces can be generated on the thrombus. When the expansion net expands during the dragging process, the expansion net closely contacts the thrombus and wraps the thrombus mass. At the same time, the expanded expansion net can closely adhere to the blood vessel wall during the dragging process, so as to scrape the thrombus, thereby avoiding the residue of the thrombus during the removal process and improving the effect of thrombus removal.

[0023] By setting the suction component, when the abutting block pushes the expansion net to expand and at the same time the expanded expansion net can closely adhere to the blood vessel wall during the dragging process to scrape the thrombus, the connecting block drives the third fixed sleeve to move simultaneously during the reciprocating movement. When the connecting block pushes the expansion net to expand, the fixed rod drives the third piston block to move relative to the inside of the third fixed sleeve, so that a negative pressure is formed inside the third fixed sleeve, and the thrombus remaining on the blood vessel wall is sucked into the third fixed sleeve through the input port opened inside the connecting block. When the third piston block moves to the rear of the drainage groove, the negative pressure state inside the third fixed sleeve is released, so that the sucked thrombus will flow into the connecting block through the drainage groove for storage. Then, through the reciprocating movement of the connecting block, the fallen thrombus can be sucked into the connecting block for storage, thereby ensuring that the thrombus can be quickly captured and stored, which avoids the further embolism risk that may be caused by the free floating of the thrombus in the blood flow.

[0024] By setting components such as a guiding ring, before the dropped thrombus enters the interior of the third fixing sleeve, the suction force generated by the movement of the sealing film inside the third fixing sleeve causes the four thin films of the sealing film to open towards the inside of the connecting block, enabling the dropped thrombus to be sucked into the drainage chamber. The sucked thrombus is guided into the interior of the third fixing sleeve through the stepped guiding ring. When the connecting block moves in the reverse direction, since the guiding ring is inclined towards the inner side of the drainage chamber, when the thrust generated inside the third fixing sleeve pushes the entering thrombus, the thrombus will be blocked by the guiding ring, preventing the sucked thrombus from re-entering the patient's blood vessel. At this time, the four thin films of the sealing film are in an open state towards the outside of the connecting block. When the connecting block stops, the sealing film is in a closed state, preventing other substances from entering when the connecting block stops. This design ensures that once the thrombus is sucked in and guided into the interior of the third fixing sleeve, it will not be re-sucked into the patient's blood vessel, thus greatly reducing the embolism risk during the operation. Brief Description of the Drawings

[0025] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0026] Figure 1 Structural schematic diagram of the present invention;

[0027] Figure 2 Cross-sectional view of the catheter of the present invention;

[0028] Figure 3 For the present invention Figure 2 Enlarged structural diagram at position A in;

[0029] Figure 4 Structural schematic diagram of the driving mechanism of the present invention;

[0030] Figure 5 Internal structural schematic diagram of the cleaning tube of the present invention;

[0031] Figure 6 Cross-sectional view of the first fixing sleeve of the present invention;

[0032] Figure 7 Cross-sectional view of the air delivery ring of the present invention;

[0033] Figure 8 Partial structural schematic diagram of the drainage chamber of the present invention;

[0034] Figure 9 Structural schematic diagram of the sealing film of the present invention.

[0035] [Reference Numerals]

[0036] 1. Guide wire; 2. Catheter; 3. Cleaning tube; 4. Expansion net; 5. First fixing sleeve; 6. Gas transmission ring; 7. Delivery groove; 8. Spherical rod; 9. Pressure groove; 10. First piston block; 11. Elastic block; 12. Contact block; 13. Gas guiding groove; 14. Connecting block; 15. Sealing film; 16. Second fixing sleeve; 17. Second piston block; 18. Connecting rod; 19. Fixing rod; 20. Third fixing sleeve; 21. Third piston block; 22. Drainage chamber; 23. Guide ring; 24. Drainage groove.

[0037] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are labeled in the figure. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0038] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0039] It should be pointed out that in the specification, when referring to "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc., it indicates that the described embodiment may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Additionally, when combining an embodiment to describe a specific feature, structure, or characteristic, implementing such feature, structure, or characteristic in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0040] Generally, terms can be understood at least in part from their use in the context. For example, at least in part depending on the context, the term "one or more" used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, allowing for the existence of other factors that may not be explicitly described.

[0041] It is understood that the meanings of "on...", "above...", and "overhead of..." in the present invention should be interpreted in the broadest manner, such that "on..." not only means "directly on" something, but also includes the meaning of being on something with intermediate features or layers therebetween, and "above..." or "overhead of..." not only means "above" or "overhead of" something, but may also include the meaning of being "above" or "overhead of" something with no intermediate features or layers therebetween.

[0042] In addition, spatial relative terms such as "under...", "below...", "lower part", "above...", "upper part", etc. may be used herein for convenience of description to describe the relationship between one element or feature and another or more elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device may be oriented in other ways, and the spatial relative descriptors used herein may be similarly interpreted accordingly.

[0043] As Figures 1 to 9 shown, an embodiment of the present invention provides a device for removing atherosclerotic calcified thrombus, including a guide wire 1, a catheter 2 is provided on the outer wall of the guide wire 1, two cleaning tubes 3 are provided between the outer wall of the guide wire 1 and the catheter 2, and an expansion net 4 is installed between the two cleaning tubes 3; an expansion mechanism, located on the mesh nodes of the expansion net 4, for pushing the expansion net 4 to expand and contract, the expansion mechanism includes a connection block 14 fixedly connected to the mesh nodes of the expansion net 4, there are multiple groups of the connection blocks 14, each group of the connection blocks 14 has multiple, and the multiple connection blocks 14 are equidistantly distributed around the nodes of the expansion net 4; a driving mechanism, provided inside the catheter 2, for cooperating with the expansion mechanism to operate.

[0044] The driving mechanism includes a first fixed sleeve 5 fixed inside one of the cleaning tubes 3, a conveying groove 7 is opened inside the first fixed sleeve 5, a pressure groove 9 is opened inside the first fixed sleeve 5, a through groove is opened at the bottom of the pressure groove 9, the conveying groove 7 is communicated with the pressure groove 9 through the through groove, a spherical rod 8 is slidably connected inside the cleaning tube 3, a first piston block 10 is fixedly connected to the end of the spherical rod 8, an elastic block 11 is installed between the first piston block 10 and the pressure groove 9, the driving mechanism further includes a plurality of abutting blocks 12 fixedly connected inside the catheter 2, the abutting blocks 12 are arranged in an array inside the catheter 2, the abutting blocks 12 are trapezoidal, and a pushing component for pushing the connection block 14 is provided at the bottom of the first fixed sleeve 5.

[0045] The pushing component includes an air delivery ring 6 fixedly connected to the bottom of the first fixed sleeve 5. A plurality of air guiding grooves 13 are formed in the top of the air delivery ring 6. The plurality of air guiding grooves 13 are respectively communicated with one of the conveying grooves 7, and the air guiding grooves 13 are communicated with the inside of the air delivery ring 6. The pushing component further includes a plurality of second fixed sleeves 16 fixedly connected to the inside of the air delivery ring 6. A connecting rod 18 is slidably connected to the inside of each second fixed sleeve 16. One end of the connecting rod 18 is fixedly connected to a second piston block 17. One end of the connecting rod 18 penetrates through the outer wall of the air delivery ring 6 and is fixedly connected to the connecting block 14.

[0046] First, the staff inserts the guide wire 1 into the patient's blood vessel through the projection device, then moves the catheter 2 along the guide wire 1 to the thrombus position, and then moves the cleaning tube 3 and the first fixed sleeve 5 along the guide wire 1 to the thrombus position. When the expansion net 4 transmits an external pulling force or pushing force through the guide wire 1 or the catheter 2, the net structure is axially stretched or radially expanded. Since the expansion operation of the expansion net 4 is a prior art, it is not described in detail in this solution. After the expansion is performed under the operation of the staff, when the staff drags the cleaning tube 3 to move inside the catheter 2 to clean the thrombus, because the abutting block 12 inside the catheter 2 is trapezoidal, when the spherical rod 8 touches one side slope of the abutting block 12, when the spherical rod 8 moves from the lowest point to the highest point of the slope, the side slope of the abutting block 12 generates a pushing force on the spherical rod 8, pushing the spherical rod 8 into the cleaning tube 3. At this time, the spherical rod 8 drives the first piston block 10 to move into the pressure groove 9, stretching the elastic block 11, and the first piston block 10 discharges the gas from the pressure groove 9 into the conveying groove 7 through the through groove when moving.

[0047] When there is gas output from the conveying groove 7, the gas inside the conveying groove 7 is introduced into the inside of the gas delivery ring 6 from the gas guide groove 13, so that the gas pressure inside the gas delivery ring 6 increases, so that the gas can enter the second fixed sleeve 16 to push the second piston block 17 to move, and push the connecting rod 18 to drive the second piston block 17 to move from the inside of the second fixed sleeve 16 to the outside of the gas delivery ring 6, and at the same time push the connecting block 14 to push the node connected to the expansion network 4. When the spherical rod 8 moves from the highest point of the abutment block 12 to the lowest point, under the action of the elastic block 11, the spherical rod 8 is driven to draw the squeezed air back to the inside of the pressure groove 9, and then the connecting block 14 brings the expansion network 4 to the bottom of the pressure groove 9. The net 4 contracts inward, and the staff pulls the cleaning tube 3 to move smoothly, so that the spherical rod 8 forms a reciprocating motion through the contact with the abutment block 12, and the connecting block 14 drives the expansion net 4 to contract and expand by connecting the nodes on the expansion net 4. Through the contraction and expansion of the expansion net 4, repeated mechanical forces can be exerted on the thrombus. When the expansion net 4 expands during the dragging process, the expansion net 4 is in close contact with the thrombus and wraps the thrombus. At the same time, the expanded expansion net 4 can be tightly attached to the blood vessel wall during the dragging process, thereby having a clearing effect on the thrombus formation, thereby avoiding the thrombus from remaining during the clearing process, thereby improving the effect of thrombus clearing.

[0048] When the expansion net 4 is initially expanded, a pulling force is generated on the connecting block 14, thereby driving the second piston block 17 to move and generate a suction force on the inside of the air supply ring 6, so that the spherical rod 8 moves toward the cleaning pipe 3. When the expansion net 4 stops expanding, the spherical rod 8 is always located between the two abutment blocks 12 and does not separate from the abutment blocks 12, so that the spherical rod 8 can always be in contact with the abutment blocks 12 during the dragging process of the expanded expansion net 4.

[0049] like Figures 6 to 9 As shown, the device for removing calcified thrombi caused by atherosclerosis also includes a suction component, which is located on the inner side of the expansion net 4 and is used to cooperate with the expansion mechanism to form a suction for the thrombus. The suction component includes two third fixed sleeves 20 fixedly connected to the inside of the connecting block 14, and the two third fixed sleeves 20 are symmetrically arranged with the center of the connecting block 14 as the axis. A drainage groove 24 is opened inside the third fixed sleeve 20, and the drainage groove 24 is communicated with the inside of the connecting block 14. The suction component also includes a third piston block 21 slidably connected to the inside of the third fixed sleeve 20, and the side wall of the third piston block 21 is fixedly connected to a fixing rod 19, and one end of the fixing rod 19 passes through the outer wall of the connecting block 14 and is fixedly connected to the outer wall of the air supply ring 6.

[0050] When the abutting block 12 pushes the expansion net 4 to expand, and at the same time the expanded expansion net 4 can be closely attached to the blood vessel wall during the dragging process, when scraping the thrombus formation, the connecting block 14 drives the third fixed sleeve 20 to move simultaneously during the reciprocating movement. When the connecting block 14 pushes the expansion net 4 to expand, the fixing rod 19 drives the third piston block 21 to move relative to the inside of the third fixed sleeve 20, so that a negative pressure is formed inside the third fixed sleeve 20, and the thrombus remaining on the blood vessel wall is sucked into the inside of the third fixed sleeve 20 from the input port opened inside the connecting block 14. When the third piston block 21 moves to the rear of the drainage groove 24, the negative pressure state inside the third fixed sleeve 20 is released, so that the sucked thrombus will flow into the inside of the connecting block 14 through the drainage groove 24 for storage, and then through the reciprocating movement of the connecting block 14, the fallen thrombus can be sucked into the inside of the connecting block 14 and stored, thus ensuring that the thrombus can be quickly captured and stored, which avoids the further embolism risk that may be caused by the free floating of the thrombus in the blood flow.

[0051] When the expansion net 4 forms a pulling force on the connecting block 14 during the initial expansion, the third piston block 21 moves relative to the inside of the third fixed sleeve 20. After the expansion net 4 undergoes initial expansion, at this time, the third piston block 21 is still at a certain distance from the drainage groove 24, which is convenient for sucking the thrombus into the inside of the connecting block 14 during use.

[0052] As Figures 6 to 9 shown, one end of the third fixed sleeve 20 is provided with a conveying assembly for conveying thrombus. The conveying assembly includes a drainage chamber 22 fixedly connected to one end of the third fixed sleeve 20. A plurality of guiding rings 23 are fixedly connected inside the drainage chamber 22. The guiding rings 23 are arranged in a stepped manner inside the drainage chamber 22. The plurality of guiding rings 23 are inclined towards the inside of the drainage chamber 22. Two input ports are opened inside the connecting block 14. One end of the input port is provided with a sealing unit for closing the input port. The sealing unit includes a sealing film 15 installed inside the input port. The sealing film 15 is connected to the input end of the drainage chamber 22. The sealing film 15 is composed of four elastic film pieces.

[0053] Before the fallen thrombus enters the interior of the third fixed sleeve 20, the suction force generated by the movement of the sealing film 15 through the interior of the third fixed sleeve 20 causes the four films of the sealing film 15 to open towards the interior of the connecting block 14, so that the fallen thrombus is drawn into the drainage chamber 22. The drawn thrombus is guided into the interior of the third fixed sleeve 20 through the stepped guiding ring 23. When the connecting block 14 moves in the reverse direction, because the guiding ring 23 is inclined towards the inner side of the drainage chamber 22, when the thrust generated inside the third fixed sleeve 20 pushes the entering thrombus, the thrombus will be blocked by the guiding ring 23, preventing the inhaled thrombus from re-entering the patient's blood vessel. At this time, the four films of the sealing film 15 are in an open state towards the outside of the connecting block 14. When the connecting block 14 stops, the sealing film 15 is in a closed state, preventing other substances from entering when the connecting block 14 stops. This design ensures that once the thrombus is drawn in and guided into the interior of the third fixed sleeve 20, it will not be re-inhaled into the patient's blood vessel, thus greatly reducing the embolism risk during the operation.

[0054] The working process of the technical solution provided by the present invention is as follows:

[0055] First, the staff inserts the guide wire 1 into the patient's blood vessel through the projection device, then moves the catheter 2 along the guide wire 1 to the thrombus position, and then moves the cleaning tube 3 and the first fixed sleeve 5 along the guide wire 1 to the thrombus position. When the expansion net 4 transmits an external pulling force or pushing force through the guide wire 1 or the catheter 2, the mesh structure is axially stretched or radially expanded. Since the expansion operation of the expansion net 4 is an existing technology, it is not described in detail in this solution. After the expansion is carried out under the operation of the staff, when the staff drags the cleaning tube 3 to move inside the catheter 2 to clean the thrombus, because the abutting block 12 inside the catheter 2 is trapezoidal, when the spherical rod 8 touches one side slope of the abutting block 12, when the spherical rod 8 moves from the lowest point to the highest point of the slope, the inclined surface on one side of the abutting block 12 generates a pushing force on the spherical rod 8, pushing the spherical rod 8 towards the inside of the cleaning tube 3. At this time, the spherical rod 8 drives the first piston block 10 to move into the pressure groove 9, causing the elastic block 11 to stretch, and the first piston block 10 discharges the gas from the pressure groove 9 into the conveying groove 7 through the through groove when moving.

[0056] When there is gas output from the conveying groove 7, the gas inside the conveying groove 7 is introduced from the gas guide groove 13 into the inside of the gas delivery ring 6, generating thrust on the second piston block 17, pushing the connecting rod 18 to drive the second piston block 17 to move from the inside of the second fixed sleeve 16 to the outside of the gas delivery ring 6, and at the same time pushing the connecting block 14 to push the node connected to the expansion net 4. When the spherical rod 8 moves from the highest point of the abutment block 12 to the lowest point, under the action of the elastic block 11, the spherical rod 8 is driven to draw the squeezed air back into the inside of the pressure groove 9, and then the connecting block 14 shrinks the expansion net 4 inward, and when the staff drags and cleans it, The tube 3 moves smoothly, so that the spherical rod 8 forms a reciprocating motion through the contact with the abutment block 12, and the connecting block 14 drives the expansion net 4 to contract and expand by connecting the nodes on the expansion net 4. The contraction and expansion of the expansion net 4 can generate repeated mechanical forces on the thrombus. When the expansion net 4 expands during the dragging process, the expansion net 4 is in close contact with the thrombus and wraps the thrombus. At the same time, the expanded expansion net 4 can be tightly attached to the blood vessel wall during the dragging process, thereby having a thrombus formation and clearing effect, thereby avoiding the thrombus from remaining during the clearing process, thereby improving the thrombus clearing effect.

[0057] When the expansion net 4 is initially expanded, a pulling force is generated on the connecting block 14, thereby driving the second piston block 17 to move and generate a suction force on the inside of the air supply ring 6, so that the spherical rod 8 moves toward the cleaning pipe 3. When the expansion net 4 stops expanding, the spherical rod 8 is always located between the two abutment blocks 12 and does not separate from the abutment blocks 12, so that the spherical rod 8 can always be in contact with the abutment blocks 12 during the dragging process of the expanded expansion net 4.

[0058] When the abutment block 12 pushes the expansion net 4 to expand, the expanded expansion net 4 can be tightly attached to the blood vessel wall during the dragging process. When the thrombus is scraped, the connection block 14 drives the third fixed sleeve 20 to move simultaneously during the reciprocating movement. When the connection block 14 pushes the expansion net 4 to expand, the fixed rod 19 moves the third piston block 21 relative to the inside of the third fixed sleeve 20, so that negative pressure is formed inside the third fixed sleeve 20, and the thrombus remaining on the blood vessel wall is drawn into the third fixed sleeve 20 from the input port opened inside the connection block 14. When the third piston block 21 moves to the rear of the drainage groove 24, the negative pressure state inside the third fixed sleeve 20 is released, so that the drawn thrombus will flow from the drainage groove 24 into the connection block 14 for storage, and then the connection block 14 reciprocates, so that the fallen thrombus can be drawn into the connection block 14 and stored, thereby ensuring that the thrombus can be quickly captured and stored, which avoids the thrombus floating freely in the blood flow and may cause further embolism risks.

[0059] When the expansion net 4 forms a tensile force on the connecting block 14 during the initial expansion, the third piston block 21 moves relative to the inside of the third fixed sleeve 20. After the expansion net 4 undergoes initial expansion, at this time, there is still a certain distance between the third piston block 21 and the drainage groove 24, which facilitates the inhalation of thrombus into the connecting block 14 during use.

[0060] Before the dropped thrombus enters the inside of the third fixed sleeve 20, the suction force generated by the movement of the sealing film 15 inside the third fixed sleeve 20 causes the four films of the sealing film 15 to open towards the inside of the connecting block 14, so that the dropped thrombus is drawn into the drainage chamber 22. The drawn thrombus is guided into the inside of the third fixed sleeve 20 through the stepped guiding ring 23. When the connecting block 14 moves in the reverse direction, because the guiding ring 23 is inclined towards the inner side of the drainage chamber 22, when the thrust generated inside the third fixed sleeve 20 pushes the entering thrombus, the thrombus will be blocked by the guiding ring 23, preventing the inhaled thrombus from re-entering the patient's blood vessel. At this time, the four films of the sealing film 15 are in an open state towards the outside of the connecting block 14. When the connecting block 14 stops, the sealing film 15 is in a closed state to prevent other substances from entering when the connecting block 14 stops. This design ensures that once the thrombus is drawn in and guided into the inside of the third fixed sleeve 20, it will not be re-inhaled into the patient's blood vessel, thus greatly reducing the embolism risk during the operation.

[0061] The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. Additionally, to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0062] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A device for removing calcified thrombus caused by atherosclerosis, characterized in that: include: A guide wire, wherein the outer wall of the guide wire is provided with a catheter, a cleaning tube is provided between the outer wall of the guide wire and the catheter, the cleaning tubes are arranged longitudinally, and an expansion net is installed between the cleaning tubes; An expansion mechanism, located on the mesh nodes of the expansion net, for driving the expansion net to expand and contract; A driving mechanism, disposed inside the catheter, for operating in conjunction with the expansion mechanism; The suction component is located on the inner side of the expansion net and is used to cooperate with the expansion mechanism to form a suction for the thrombus.

2. The device for removing calcified thrombus caused by atherosclerosis according to claim 1, characterized in that: The expansion mechanism comprises a connection block fixedly connected to the mesh node of the expansion net, the connection block is provided in multiple groups, each group of the connection blocks is provided with multiple connection blocks, and the multiple connection blocks are equidistantly distributed around the expansion net node.

3. The device for removing calcified thrombus caused by atherosclerosis according to claim 2, characterized in that: The driving mechanism includes a first fixed sleeve fixed inside one of the cleaning tubes, a conveying groove is provided inside the first fixed sleeve, a pressure groove is provided inside the first fixed sleeve, a through groove is provided at the bottom of the pressure groove, the conveying groove is connected with the pressure groove through the through groove, a spherical rod is slidably connected inside the cleaning tube, the end of the spherical rod is fixedly connected to a first piston block, an elastic block is installed between the first piston block and the pressure groove, and a pushing component for pushing the connecting block is provided at the bottom of the first fixed sleeve.

4. The device for removing atherosclerotic calcified thrombus according to claim 3, characterized in that: The pushing component includes an air delivery ring fixedly connected to the bottom of the first fixed sleeve, and a plurality of air guide grooves are opened on the top of the air delivery ring. The plurality of air guide grooves are respectively connected to one of the conveying grooves, and the air guide grooves are connected to the inside of the air delivery ring.

5. The device for removing atherosclerotic calcified thrombus according to claim 4, characterized in that: The pushing component also includes a plurality of second fixed sleeves fixedly connected to the inside of the air delivery ring, each of the second fixed sleeves is slidably connected to a connecting rod, one end of the connecting rod is fixedly connected to the second piston block, and one end of the connecting rod penetrates the outer wall of the air delivery ring and is fixedly connected to the connecting block.

6. The device for removing calcified thrombus caused by atherosclerosis according to claim 5, characterized in that: The driving mechanism further comprises a plurality of abutment blocks fixedly connected to the inside of the conduit, wherein the abutment block array is distributed inside the conduit, and the abutment blocks are arranged in a trapezoidal shape.

7. The device for removing calcified thrombus caused by atherosclerosis according to claim 6, characterized in that: The suction assembly includes a third fixed sleeve fixedly connected to the interior of the connection block. A drainage groove is provided inside the third fixed sleeve, and the drainage groove is communicated with the interior of the connection block.

8. The device for removing calcified thrombus caused by atherosclerosis according to claim 7, characterized in that: The suction assembly also includes a third piston block slidably connected to the inside of the third fixed sleeve, and the side wall of the third piston block is fixedly connected to a fixing rod, one end of the fixing rod penetrates the outer wall of the connecting block and is fixedly connected to the outer wall of the air delivery ring, and one end of the third fixed sleeve is provided with a delivery assembly for delivering thrombus.

9. The device for removing calcified thrombus caused by atherosclerosis according to claim 8, characterized in that: The conveying assembly includes a drainage bin fixedly connected to one end of the third fixed sleeve, a plurality of guide rings are fixedly connected to the interior of the drainage bin, the guide rings are distributed in a stepped manner inside the drainage bin, and the plurality of guide rings are inclined toward the inner side of the drainage bin. An input port is opened inside the connecting block, and a sealing unit for closing the input port is provided at one end of the input port.

10. The device for removing calcified thrombus caused by atherosclerosis according to claim 9, characterized in that: The sealing unit comprises a sealing film installed inside the input port, the sealing film is connected to the input end of the drainage bin, and the sealing film is composed of a plurality of elastic film sheets.

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