75 results about "Thrombus aspiration" patented technology

The invention discloses a thrombus aspiration catheter. The catheter comprises an aspiration tube, wherein the aspiration tube comprises a tube socket which is connected with a catheter; a bushing is movably sleeved on the outer wall of the aspiration tube, and comprises a Y-shaped connector, a dual-lumen catheter and a balloon; the Y-shaped connector is connected with the dual-lumen catheter, and the balloon is arranged on the outer wall of the distal end of the dual-lumen catheter; an interference metal wire can be inserted into the aspiration tube; and the distal end of the interference metal wire can extend outside the distal end of the aspiration tube. The bushing is movably arranged outside the aspiration tube, and the balloon is not limited when the aspiration tube moves, so that the thrombus aspiration catheter can quickly eliminate thrombi dispersed in a wide area of a blood vessel, and treats embolism of coronary peripheral microvessels; and when large or high-viscosity thrombus is encountered, the thrombus can be scattered by utilizing the interference metal wire and aspired, so that the thrombus aspiration catheter can treat the thrombus which is difficult to aspire.

The present invention relates to compounds for treatment that protects the endothelium, prevents pathologic thrombus formation in the microcirculation and preserves platelet number and function and thus may be related to treatment or prevention of ischemic events in patients with cardiovascular disease. The present invention is particularly useful for patients having or being at increased risk of development of an ischemic event such as an acute myocardial infarction and / or no-reflow phenomena and / or ischemia-reperfusion injury by administration of agent(s) modulating and / or preserving endothelial integrity. The compounds may be administered in combination with standard treatment of acute cardiovascular ischemic events such as Platelet inhibitors such as aspirin (ASA), Thienopyridins, GPIIb / IIIa inhibitors), Parenteral anticoagulants such as unfractioned heparin (UFH), bivalirudin, enoxaparin, and fondaparinux, Verapamil, Adenosine, Sodium nitroprusside, Nitroglycerin, Epinephrine, Beta-blockers and surgical methods such as percutaneous coronary intervention (PCI), PCI with thrombus aspiration, PCI with stents.

The invention discloses a thrombus aspiration system. The thrombus aspiration system comprises a thrombus aspiration catheter and a blood bottle connected with the thrombus aspiration catheter in a matched mode. Because the ultra-thin pipe wall, wide cavity and single-cavity piping design is adopted in the thrombus aspiration catheter, thrombus aspiration can be smoothly and efficiently carried out. Because the outer edge of the far-end face of a tapered catheter section is in the fillet shape, the whole thrombus aspiration catheter can enter the vessel easily, and injury to the human body can be reduced. Because elliptical side holes are spirally distributed in the far end, large thrombi in the vessel can be easily and smoothly aspirated, the situation that the large-sized thrombi can not be aspirated is avoided, the thrombi in the vessel can be completely aspirated, and the best treatment effect is achieved. Blood aspirated from the human body during an operation flows into the blood bottle, the aspirated thrombi are filtered out through a thrombus filter screen in the blood bottle, the filtered blood can be transfused into the human body again, and therefore the autologous blood can be quickly and effectively utilized and the adverse effects like contamination of allogeneic blood to a patient is avoided.

A thrombus aspiration catheter comprises an aspiration catheter body, a guide wire and a Luer taper, wherein the guide wire is arranged at the front portion of the aspiration catheter body through a guide wire base, and the Luer taper is arranged at the rear portion of the aspiration catheter body in a through mode. The thrombus aspiration catheter is characterized in that a thrombus stripping frame is arranged between the aspiration catheter body and the guide wire base; the thrombus stripping frame comprises cutting slices, and the middle section of each cutting slice protrudes in the radial direction of the aspiration catheter body; at least one edge of each cutting slice is an acute-angle edge. The outer edge of the section C of each cutting slice involves the angle alpha and the angle beta, one of the angle alpha and the angle beta can be an acute angle, alternatively, both the angle alpha and the angle beta can be acute angles, and it is guaranteed that the outer corner of the section C is sharp enough. When operated to rotate in a blood vessel, the thrombus stripping frame can thoroughly clear away thrombi.

The invention relates to a multifunctional balloon dilatation catheter. The multifunctional balloon dilatation catheter comprises an inner catheter body, an outer catheter and a dilatation balloon, wherein a wire guide channel is formed in the inner catheter body, the outer catheter body and the inner catheter body are coaxially arranged, and the dilatation balloon is fixed to the outer catheter body. The multifunctional balloon dilatation catheter further comprises plugging balloons fixed to the outer catheter body, the plugging balloons and the dilatation balloon are arranged at intervals, a low-pressure transmitting channel, a high-pressure transmitting channel and a sucking channel are formed between the outer catheter body and the inner catheter body in the radial direction, and the outlet ends of the low-pressure transmitting channel, the high-pressure transmitting channel, the sucking channel and the wire guide channel are provided with Ruhr connectors respectively. By means of the multifunctional balloon dilatation catheter, small plaque falling from a lesion site is trapped in closed space formed by the plugging balloons, the dilatation balloon and the blood vessel wall and pumped away in time while balloon dilatation is carried out in a PCI operation; in the operation process, balloon dilatation and thrombus aspiration are completed at a time under the condition that devices are not needed to be replaced, the number of times of medical instrument exchange in the body of a patient is decreased, and therefore complications caused by blood injures of the patient are reduced.

A thrombus suction catheter including a tubular body which has a suction lumen penetrating from a proximal end to a distal end thereof, and an opening formed by an angled cut surface at a distal end thereof, wherein a guide wire lumen is formed in the distal end portion only of the tubular body, the guide wire lumen being communicated with the suction lumen.

The described invention provides several aspects designed to help mechanically break up and / or lyse a clot inside vessels and / or remove a clot via aspiration. According to some embodiments, the devices are adapted to irrigate a blood vessel during thrombectomy; to macerate an obstruction during thrombectomy, to block blood flow in a blood vessel during aspiration of a thrombus; or to capture distal emboli.

The invention discloses an intravascular thrombus suction catheter device and a mesh basket assembly thereof, and belongs to the field of vascular intervention medical treatment. The device comprisesa three-way connecting base, a catheter, a connecting base and a conveying sheath tube, and further comprises an expandable guide head end and a self-expansion mesh basket assembly. The self-expansionmesh basket assembly consists of a mesh basket conveying pipe, a hammer-like guide cap, a mesh basket supporting pipe and a self-expansion mesh basket, wherein the mesh basket conveying pipe is inserted into the catheter, the hollow hammer-like guide cap is arranged at the far end of the mesh basket conveying pipe, the mesh basket supporting pipe is inserted into the mesh basket conveying pipe, and the self-expansion mesh basket is fixed to the far end of the mesh basket supporting pipe. The hammer-like guide cap serving as a thrombus breaking separator is arranged at the suction opening in the head end of the far side of the catheter and used for breaking and separating thrombus blocked at the suction opening of the suction catheter; and the self-expanding mesh basket is arranged at thefar end of the lesion thrombus and used for scraping and collecting thrombus tissue attached to the wall of a blood vessel, and besides, the collected thrombus tissue is pushed to the position near the suction opening in the near end of the suction catheter.

The invention relates to a thrombus aspiration catheter system. The thrombus aspiration catheter system comprises an aspirator, a medicine injection device and a four-way tube; the four-way tube consists of a main tube, and an upper branch tube and a lower branch tube which are symmetrically distributed on the main tube; one end of the main tube is connected with a front-section catheter through a front end connecting tube, and the other end of the main tube is connected with a shut-off valve I; the upper branch tube is connected with one end of a back-end catheter I through a shut-off valve II; the other end of the back-end catheter I is connected with the aspirator; the lower branch tube is connected with one end of a back-end catheter II through a shut-off valve III; the other end of the back-end catheter II is connected with the medicine injection device; a center shaft penetrating through the front-section catheter, the front-end connecting tube and the main tube is provided with a metal stirring wire; the near end of the metal stirring wire is provided with a handle I; the far end of the metal stirring wire is provided with a diamond ring. The thrombus aspiration catheter system can implement treatment on thrombus and plaques before aspiration, can also implement aspiration, can also timely inject thrombolytic agents, and is simple in structure and convenient to operate.

The invention discloses a thrombus aspiration catheter which comprises a catheter main body and a guide wire chamber (8) arranged at an advancing end of the catheter main body, wherein the catheter main body is provided with an aspiration chamber (3); the guide wire chamber (8) is located in the inner side at the far end of the aspiration chamber (3) and is communicated with the aspiration chamber (3); a guide wire enters the guide wire chamber (8), passes through the aspiration chamber (3) and leaves away from the catheter main body at a joint (1). The thrombus aspiration catheter according to the technical scheme can solve the problems of low aspiration speed and easiness in aspiration chamber blocking caused by the smaller radial cross section areas of aspiration hole and aspiration chamber of the thrombus aspiration catheter in the prior art. The invention also provides a thrombus aspiration device.

The embodiment of the invention discloses a thrombus aspiration catheter applied to the field of medical apparatuses and instruments. The catheter comprises an aspiration cavity 19, a guide wire cavity 11, a bag body 13, a bag body pressurization passageway 16 and a pipe base 15. The guide wire cavity 11 is a cavity, separated at the end of an aspiration inlet 12, of the aspiration cavity 19. The guide wire cavity 11 comprises a guide wire cavity inlet 18 and a guide wire cavity outlet 14. The guide wire cavity inlet 18 is an inclined plane notch extending out of the aspiration cavity inlet 12. The guide wire cavity outlet 14 is located in any side of the two sides of the bag body. The bag body 13 is located at the end, close to the aspiration cavity inlet 12, of the catheter. The bag body 13 wraps the outer side of the aspiration cavity 19 and the outer side of the guide wire cavity 11. The bag body pressurization passageway 16 is a passageway attached to the aspiration cavity 19. The pipe base 15 is located at the end, close to an aspiration cavity connector 17, of the catheter. The pipe base 15 is connected with the aspiration cavity connector 17. By means of the thrombus aspiration catheter, the aspiration effect and efficiency are greatly improved.

The invention discloses a thrombus suction catheter. The thrombus suction catheter comprises a catheter body, and the distal end of the catheter body is provided with a soft head and an expandable tracer mark embedded in the soft head; the expandable tracer mark is one or more Z-shaped closed structures, wavy closed structures and precut or half-cut annular structures or precut or half-cut spring-shaped structures which are developed in visual light. When the maximum outer diameter and maximum inner diameter of the thrombus suction catheter are limited by the sizes of the applied blood vessels, the soft head at the distal end and the expandable tracer mark can effectively increase the radial sectional areas of a suction hole and a suction cavity, thrombus and other embolic substances in the blood vessels can be stably, efficiently and rapidly removed, and the problems of low suction efficiency and thrombus stripping caused by the small radial sectional area of the suction cavity in the prior art can be effectively solved.

The invention discloses a medicine eluting balloon catheter with a function of thrombus aspiration and vasodilatation, and belongs to the field of medical device. The catheter structure comprises a balloon cavity 1, an auxiliary cavity 2, a RX port 3, a guide wire cavity 4, a developing ring 5, a suction cavity 6 and a Y-type connector 7. The balloon cavity is in the outermost layer of the suctioncatheter, the auxiliary cavity 2 is on the inner wall of the suction cavity 6, and the guide wire cavity 4 is on the distal end inner wall of the suction cavity 6. The medicine eluting balloon catheter is used for medicine thrombolysis by injecting thrombolytic medicine into the suction cavity 6. The invention of the medicine eluting balloon catheter is set an auxiliary chamber on the inner wallof the suction cavity 6, applying the improved in vitro ultrasonic assisted thrombolysis (ETUS) function, and a small metal microporous cylinder is placed in human body by the auxiliary cavity 2 conveying system; the medicine eluting balloon catheter reflects multiple direction ultrasonic wave through in vitro ultrasonic probe ultrasound and porous cylinder to amplify ultrasonic cavitation effect,improving the efficiency of broken bolt, and feeds into the interference wire through the auxiliary cavity 2 to break the bolt with mechanical force.

The invention relates to a device for dredging cardio-cerebral vessels and cleaning vascular thrombosis, and belongs to the technical field of medical appliance structures. The device comprises a guiding catheter, wherein an inflatable balloon which can be inflated and deflated is arranged on the outer wall of the guiding catheter, and a microcatheter is inserted in the guiding catheter; a part of the microcatheter is positioned inside the guiding catheter, and a part of the microcatheter is positioned outside the guiding catheter; a driving mechanism used for driving the microcatheter to rotate and a sucking device are arranged on the microcatheter; sucking holes are distributed in partial wall of the microcatheter; a micro-guiding wire is inserted in the microcatheter; a detachable anti-thrombus ball net is arranged at one end of the micro-guiding wire; and a reticular vessel stent for supporting vessels is arranged outside the micro-catheter, and is of a cylindrical shape after being unfolded. The device is reasonable in structure design, simple and convenient to operate and strong in plasticity, can be used for sucking and cleaning thrombus while dredging vessels, and has a vessel supporting effect.

The invention relates to a thrombus aspiration catheter with a telescopic clot crushing assembly. The catheter comprises a suction tube, a multi-channel tube base and a crushing assembly, and an annular medicine injection channel is formed between an inner tube and an outer tube of the suction tube, and the multi-channel tube base is composed of a main tube body, a medicine injection branch pipe and a suction branch pipe, the crushing assembly comprises a control channel tube, a rotating shaft, a control rod and a crushing unit, the rotating shaft penetrates through the control channel tube, and the crushing unit comprises a first sleeve, a second sleeve and a crushing rod, the crushing rod is composed of two rod bodies with two head ends hinged together, the tail ends of the two rod bodies are hinged to the first sleeve and the second sleeve respectively, the first sleeve fixedly sleeves the rotating shaft, and the second sleeve slidingly sleeves the rotating shaft. When the thrombuswhich is large in volume and high in viscosity exists, the crushing assembly is unfolded, by means of the crushing assembly, the large block of thrombus can be crushed, the large block of the thrombuscan smoothly enter the suction tube conveniently, and meanwhile crushing and oil suction can be conducted; the working efficiency is high.

The invention relates to the technical field of medical equipment, and discloses a multifunctional sheath tube. The sheath tube comprises a sheath tube body; a connecting piece is arranged at the nearend of the sheath tube body; the connecting piece comprises a connecting piece housing connected to the sheath tube body and a three-way valve arranged on the connecting piece housing; the three-wayvalve is in sealing fit with the connecting piece housing; a thrombus aspiration assembly is connected to the connecting piece housing; an instrument leading-in channel is formed between the sheath tube body and the connecting piece housing, and a thrombus aspiration channel is formed among the sheath tube body, the connecting piece housing and the thrombus aspiration assembly; and the three-way valve is used for alternatively opening the instrument leading-in channel or the thrombus aspiration channel. The embodiment of the invention not only can be independently used as a leading-in sheath tube, but also has a thrombus aspiration function, so that thrombectomy steps can be reduced, and the operation efficiency is improved.

The described invention provides several aspects designed to help mechanically break up and / or lyse a clot inside vessels and / or remove a clot via aspiration. According to some embodiments, the devices are adapted to irrigate a blood vessel during thrombectomy; to macerate an obstruction during thrombectomy, to block blood flow in a blood vessel during aspiration of a thrombus; or to capture distal emboli.

The invention relates to an aspiration device, in particular to a thrombus aspiration device, and belongs to the technical field of medical instrument structures. The thrombus aspiration device comprises a metal sheath, a rotary cutter and an expander. The metal sheath comprises a metal spiral pipe, a side pipe is arranged at one end of the metal spiral pipe, and one end of the side pipe is movably connected with a first backflow preventing cap. The rotary cutter comprises a crank, a spiral flow guide groove is formed in the end, away from the handle, of the rotary cutter, a second backflow preventing cap is arranged at the end, close to the handle, of the rotary cutter, and a blade is arranged between the second backflow preventing cap and the spiral flow guide groove. The thrombus aspiration device can replace an original long metal sheath, the expander is withdrawn, the rotary cutter is fed in, the thrombus aspiration device is formed, the side pipe generates negative pressure through pumpback of an injector, thrombus is made to enter the metal sheath, the rotary cutter is rotated, the thrombus is conveyed to move into a lumen under the combined action of the rear driving force of the flow guide groove and the negative pressure, the middle blade cuts the thrombus into small blocks, the thrombus is sucked out of the side pipe, the situation that large thrombus blocks block the pipe cavity, and consequently the aspiration process is interrupted is avoided, operation efficiency is improved, and operative complications are reduced.

The invention provides a thrombus aspiration catheter. The thrombus aspiration catheter comprises a catheter seat, a stress release tube, a catheter body and a developing identifier; when thrombus aspiration is carried out, blood vessels can be blocked, so that broken small thrombus is prevented from flowing to smaller blood vessels at the far end; more importantly, in the aspiration process, thrombus can be crushed and cut through thrombus crushing equipment at the tail end of the catheter; old or hard thrombus can be smoothly sucked out through suction, so that the success rate of an operation is greatly improved, and the risk of the operation is reduced; the invention has great significance in reducing complications and improving the aspiration effect of thrombus.

The described invention provides several aspects designed to help mechanically break up a clot inside vessels and / or remove a clot via aspiration simultaneously. According to some embodiments, the devices are adapted to irrigate a blood vessel during thrombectomy; to macerate an obstruction during thrombectomy, to block blood flow in a blood vessel during aspiration of a thrombus; or to capture and remove distal emboli. With the described invention, when used to ameliorate arterial clots, irrigation and aspiration are performed simultaneously in conjunction with a balloon or occlusive catheter to reverse flow of the vessel. With the described invention, when used to ameliorate venous clots and most arterio-venous dialysis grafts, a filter-tipped aspirator is used downstream from the clot to capture and remove dislocated emboli.

The invention relates to the technical field of medical apparatus and instruments, and discloses a negative pressure suction device. The negative pressure suction device comprises a handheld negativepressure controller, a blood storage bag and a connecting pipe, wherein the connecting pipe is provided with a first branch pipe, a second branch pipe and a third branch pipe; the handheld negative pressure controller is in sealing connection with the first branch pipe; the blood storage bag is in sealing connection with the second branch pipe; the third branch pipe is in sealing connection with aguide pipe; a sealed suction cavity is formed among the handheld negative pressure controller, the blood storage bag and the guide pipe; the handheld negative pressure controller is used for formingnegative pressure in the suction cavity to suck out thrombi and / or blood through the guide pipe; and the blood storage bag is used for collecting the thrombi and / or blood which can be sucked out. Byuse of the embodiment of the invention, a doctor can carry out handheld operation and control, in addition, continuous suction can be realized through a repeated operation, thrombus taking efficiencyis high, meanwhile, the blood can be recovered in a thrombus suction process to protect a patient from excessive hemorrhage, and in addition, other complications are avoided.

The invention relates to an ablation and suction laser guide pipe, which comprises a guide pipe main body, a suction guide pipe and a guiding end head, wherein one end of the guide pipe main body is used for being connected with a laser generation device; the other end of the guide pipe main body is connected with the guiding end head; the guiding end head is used for emitting laser; one end of the suction guide pipe is used for extending into the guide pipe main body and is penetrated out of the guiding end head to suck a target object; and the other end of the suction guide pipe is used for being connected with a negative pressure generation device. In a process that the above ablation and suction laser guide pipe carries out laser ablation, the laser enters the guiding end head along the guide pipe main body and is emitted to a lesion plaque and a thrombus from the guiding end head to ablate a lesion and the thrombus. After negative pressure is generated in the suction guide pipe, the target object generated after ablation is sucked to realize local quick cooling, recover a blood flow in the blood vessels and lighten a burden generated to the human body by decomposition of the target object.

The invention discloses a thrombus aspiration catheter with the spiral cutting bolt breaking function, and belongs to the technical field of medical apparatus and instruments. The catheter comprises apipe base, a double-cavity pipe, a protective shell, a transmission pipe and a cutting tool; the pipe base is provided with a first connecting end, a second connecting end and a third connecting end,a blind hole is formed in the first connecting end of the pipe base, a pipe hole is formed in the bottom of the blind hole, and a diversion hole is formed in the third connecting end of the pipe base; the double-cavity pipe comprises a pipe body which is internally provided with a first channel and a second channel, one end of the pipe body is inserted into the blind hole, the axis of the first channel coincides with the axis of the pipe hole, the second channel is communicated with the diversion hole, the protective shell is arranged at the end, away from the pipe base, of the pipe body, a through hole is formed in the side wall of the protective shell, a transmission pipe penetrates through the pipe hole and the first channel, one end of the transmission pipe extends into the protectiveshell, and a cutting tool is arranged at the end, located in the protective shell, of the transmission pipe. Accordingly, the structure is simple, convenience is brought to use, the safety is good, and operative complications can be greatly lowered.

The invention discloses an expansion balloon with a convex-concave surface. The expansion balloon is used for expansion treatment of vascular and non-vascular stenosis. Protrusions and grooves are formed in the outer surface of the convex-concave expansion balloon, the protrusions and the grooves are evenly distributed on the outer side of the convex-concave expansion balloon in a continuous (thread-shaped) and / or discontinuous (crawler-shaped) mode, and the protrusions and the grooves in the convex-concave expansion balloon can be integrally formed when the balloon is formed, or formed twiceon the surface of the formed traditional balloon. When the balloon is expanded, the protrusions on the outer surface of the balloon concentrate pressure in the balloon, the high-pressure expansion effect is achieved, stress is uniform, and expansion is safer; a groove part on the outer surface of the balloon can be used for loading medicines, so that the loading capacity of the medicines can be remarkably increased, and the loss of the medicines in the conveying process is reduced; in a thrombus aspiration catheter, the thrombus aspiration effect can be improved; and the balloon can prevent astent from falling off in the conveying process when the stent is conveyed, and the use is safer.

A catheter device and method for treating an artery with thrombus, the catheter comprising an inflatable member. A carrier catheter has a proximal end and a distal end adapted to be inserted percutaneously into an artery, the carrier catheter having a tubular body adjacent to a rear end of the inflatable member. An inflating tube passes through the tubular body and having an open front end in fluid communication with the inflatable member to inflate same. An infusion tube is adapted to infuse pharmacologic agents, the infusion tube passing through the tubular body and having an open front end extending beyond the inflatable member. An aspiration tube is adapted to aspire the thrombus, the aspiration tube passing through the tubular body and having an open front end between the carrier catheter and the inflatable member.

The invention provides a pusher and a thrombus aspiration system comprising the same. The system comprises a suction sheathing canal, a sheathing canal positioning support and a pusher. The suction sheathing canal comprises a sheathing canal body, and the sheathing canal positioning support is arranged at the far end of the sheathing canal body. The sheathing canal positioning support is of a self-expanding support structure with the two ends open. The pusher comprises a pushing head, a pushing rod and a driving assembly. The pushing head is provided with an annular cavity which is provided with an opening facing the near end and used for containing the sheath tube positioning support in the compressed state. The far end of the pushing rod is connected with the near end of the pushing head, and the pushing rod and the pushing head can penetrate through the suction sheath tube and can axially move relative to the suction sheath tube. The driving assembly is connected with the pushing rod and used for driving the pushing rod to move towards the far end in the suction sheathing canal so as to release the sheathing canal positioning support. According to the embodiment of the invention, the suction sheathing canal performs centered suction through the supporting effect of the sheathing canal positioning bracket, the suction port can be expanded, the suction efficiency is improved, the blood loss amount is reduced, and the operation is convenient.

The invention relates to the technical field of medical instruments, in particular to a thrombus aspiration system of a double-balloon ultrasonic catheter and application of the thrombus aspiration system. The thrombus aspiration system comprises a balloon catheter, a far-end balloon and a near-end balloon, and the balloon catheter penetrates through the far-end balloon and the near-end balloon; and an ultrasonic energy electrode is arranged on the balloon catheter. An energy electrode generating electrode of the ultrasonic catheter is arranged between the two balloons, one balloon is placed at the far end of the calcification lesion or thrombus, and the other balloon is placed at the near end of the calcification lesion or thrombus; and after the two balloons are filled, the calcification lesion or thrombus is in a closed state, and a calcification area is removed. The ultrasonic energy electrode is arranged on the balloon catheter, so that the ultrasonic energy electrode can be used for directly driving liquid vibration to directly act on the inner wall of a blood vessel without attenuation of the balloon wall; and a flushing opening and a suction opening are formed in the catheter in the middle of the two balloons, and calcification lesions or thrombus can be removed through ultrasonic energy and medicine flushing and suction at the same time.

The invention provides a thrombus aspiration catheter, and belongs to the field of medical instruments. The thrombus aspiration catheter comprises a catheter hub and a catheter body, wherein a winderis arranged in the catheter hub, the catheter body sequentially consists of an inner-layer polymer tube, a middle-layer support tube and an outer-layer polymer tube from inside to outside, 0-4 core wires are uniformly distributed in the catheter body in the circumferential direction, one end of each core wire is fixedly connected to the winder, the other end of the core wire is fixed to the far end of the catheter body, a bulging section capable of expanding and contracting in the circumferential direction is arranged at the far end of the outer-layer polymer tube and is composed of a bulgingsection near end, a bulging section middle section and a bulging section far end which are connected in sequence from the near end to the far end, and elastic spiral winding wires are arranged in thebulging section near end and the bulging section far end. According to the thrombus aspiration catheter, the advancing angle of the catheter can be freely and flexibly adjusted by arranging the core wires, backflushing is reduced by arranging the bulging section, the catheter body can still move during near-end plugging, the difficulty in operation is reduced, and the suction effect is improved.

The invention provides a mechanical thrombus aspiration device. The mechanical thrombus aspiration device comprises a guide wire, a far-end assembly, a catheter set, a sheath tube base and a control handle. The far-end assembly is composed of a conical tip, a suction pipe with holes in the side wall and an outer frame. The far-end assembly is controlled to be switched between the release state and the recovery state through the control handle, in the release state, the far-end assembly is pushed out of the far-end end of the catheter set, and in the recovery state, the far-end assembly is recovered into the catheter set. The outer frame is of an enveloping net structure, and the outer frame is arranged on the outer side of the suction pipe in a sleeving mode. The axial length and the circumferential diameter of the outer frame can be adjusted, and the outer frame is attached to the inner wall of the blood vessel by adjusting the effective length and the outer diameter of the outer frame. When the mechanical thrombus suction device is used, small-size thrombus can directly flow into the outer frame, the net-shaped structure of the outer frame has the thrombus cutting capacity, and under the action of suction force of the suction pipe, large thrombus is cut by the outer frame, broken and squeezed into the outer frame so that the large thrombus can be conveniently sucked and removed by the suction pipe.

The invention discloses a novel thrombus aspiration composite balloon system. The system comprises a guide tube and an aspiration tube, wherein the guide tube is sleeved with the aspiration tube, the guide tube comprises a thrombus intercepting structure used for blocking a distal blood vessel, and the thrombus intercepting structure is located at the distal end of the guide tube; and the aspiration tube comprises a blood vessel opening structure and a negative pressure suction structure, the blood vessel opening structure is arranged at the distal end of the aspiration tube, and the negative pressure suction structure is arranged at the proximal end of the aspiration tube. The thrombus intercepting structure can intercept thrombus softened and floating by negative pressure, and thrombus embolism caused by the fact that the thrombus flows along with blood is prevented.