125 results about "Thrombus aspiration" patented technology

The invention discloses a thrombus excision system. An embolus is extracted through a mechanical embolus extraction device, a blood vessel is dredged, and revascularization of the blood vessel is achieved. A saccule guide catheter is put at the near end of the embolus part when the embolus is extracted, blood flow is temporarily blocked, and thus a fine crushed embolus generated in the embolus extraction process is prevented from being flushed to the far end of the blood vessel; meanwhile, for a relatively large embolus, a part of thrombus can also be sucked by virtue of the saccule guide catheter, and then the residual thrombus can be extracted by virtue of a thrombus exsector. The thrombus exsector, the saccule guide catheter and a delivery microcatheter are arranged on the thrombus excision system disclosed by the invention, wherein the thrombus exsector is used as a main component, an excision spring is arranged, and the release state of the excision spring is a conical spiral state. Compared with the prior art, the thrombus excision system has the advantages that the thrombus exsector is very soft, the minimal through size is 0.014' (0.36mm), the thrombus exsector can easily enter a cerebral vessel, a near-end protection technology is adopted in the operation process, and thrombus suction is combined with mechanical embolus extraction, so that the success rate of the operation is improved, and the complications are reduced.

Systems and methods include positioning of a catheter lumen in a first position with respect to a thrombus, the catheter lumen defined by a catheter, initiating of evacuation of a tubing lumen, where the tubing lumen is not in fluid communication with the catheter lumen, determination that a pressure within the tubing lumen is equal to or less than a target aspiration pressure, and, in response to the determination that the pressure within the tubing lumen is equal to or less than a target aspiration pressure, automatic establishment of fluid communication between the tubing lumen and the catheter lumen.

The invention provides a thrombus aspiration catheter with the variable inner diameter of the far end, and belongs to the technical field of interventional surgical instruments.The catheter comprises an interventional catheter, an operating handle and a collecting component, and the interventional catheter is used for moving along a blood vessel to be close to the thrombus position; the operating handle is arranged at the near end of the interventional catheter and is used for providing suction force for the interventional catheter; the collecting part is arranged at the far end of the interventional catheter, the near end of the collecting part is communicated with the interventional catheter, and the far end is open and adjustable in diameter; when the interventional catheter moves along the blood vessel to be close to the thrombus, the diameter of the collecting part is in a contracted state and is not larger than that of the interventional catheter, and after the collecting part is in place, the collecting part expands to increase the diameter of the far end so as to integrally suck the thrombus; the thrombus aspiration catheter is mainly used for solving the technical problems that in the prior art, a small-caliber thrombus aspiration catheter is insufficient in aspiration force, repeated aspiration is needed, thrombus escape is easily caused, and a large-caliber catheter is poor in passing ability and difficult to reach a diseased region.

The utility model discloses a thrombus aspiration plugging sheath system based on a special-shaped cavity, which comprises a vacuum device, an aspiration plugging sheath, an aspiration plugging sheath and an aspiration plugging sheath, and is characterized in that the vacuum device comprises a negative pressure needle cylinder and a piston buckle arranged on the side wall of the negative pressure needle cylinder; the balloon sheath tube comprises a tube body, a balloon used for blocking is arranged at the far end of the tube body, a connector connected with the vacuum device is arranged on the side of the near end of the tube body in a supporting mode, and a plurality of special-shaped cavities are formed in the tube body; the thrombus dragging instrument is used for blocking blood flow to reduce blood loss during thrombus suction and intercepting the thrombus to prevent the thrombus from escaping when the thrombus is dragged; the vacuum device is arranged on the side branch of the near end of the balloon sheath tube, and the thrombus dragging instrument is arranged in the balloon sheath tube. According to the embodiment of the utility model, the balloon filling opening and the thrombus suction opening are formed in the catheter body, a multi-cavity structure is adopted, the balloon sheathing canal blocks blood flow, and the thrombus dragging instrument is matched with a vacuum device to suck, drag and take out thrombus.

The invention provides a thrombus aspiration catheter. The thrombus aspiration catheter comprises an inner tube, an inner tube handle, an outer tube and an outer tube handle, the far end of the outer tube is provided with a conical head capable of being elastically opened, the conical head is in a sealed state in a natural state, suction side holes are formed in the peripheral wall of the far end of the outer tube, and the near end of the outer tube is connected with an outer tube handle. The inner tube is movably arranged in the outer tube in a penetrating mode, the far end of the inner tube can eject open and penetrate out of the conical head, the conical head and the inner tube are elastically sealed, the near end of the inner tube extends out of the near end of the outer tube handle and is connected with the inner tube handle, the inner tube handle is provided with a negative pressure source connecting assembly, and the inner tube handle is provided with an adjustable sealing valve. A sealed aspiration channel is formed within the inner tube and an instrument is sealed therethrough. Therefore, aspiration of thrombus in different directions, especially adherent and centered thrombus can be conveniently achieved, the aspiration ports in different directions are convenient and rapid to switch, and the thrombus aspiration efficiency and the thrombus extraction effect can be improved.

The present disclosure relates generally to thrombectomy devices. An exemplary catheter comprises: an emitter assembly comprising at least one emitter; wherein each emitter comprises an electrode pair, and wherein each emitter is configured to generate a plurality of cavitation bubbles when a voltage is applied to the pair of electrodes; an infusion lumen formed by at least a portion of an outer wall of the catheter, the infusion lumen configured to receive a conductive fluid, wherein the emitter assembly is housed within the infusion lumen, wherein a distal segment of the infusion lumen includes a plurality of holes on the portion of the outer wall of the catheter, and wherein the plurality of holes are configured to release the conductive fluid and the plurality of cavitation bubbles out of the catheter to treat thrombus at a treatment site; an aspiration lumen including aspiration ports at the distal segment thereof.

The present disclosure relates generally to thrombectomy devices. An exemplary catheter comprises: an emitter assembly comprising at least one emitter; wherein each emitter comprises an electrode pair, and wherein each emitter is configured to generate a plurality of cavitation bubbles when a voltage is applied to the pair of electrodes; an infusion lumen formed by at least a portion of an outer wall of the catheter, the infusion lumen configured to receive a conductive fluid, wherein the emitter assembly is housed within the infusion lumen, wherein a distal segment of the infusion lumen includes a plurality of holes on the portion of the outer wall of the catheter, and wherein the plurality of holes are configured to release the conductive fluid and the plurality of cavitation bubbles out of the catheter to treat thrombus at a treatment site; an aspiration lumen including aspiration ports at the distal segment thereof.

Disclosed herein are devices, systems, and methods for at least partially automatically aspirating clot material and blood from the vasculature of a patient, filtering the blood from the clot material, and returning the blood to the vasculature of the patient. In some embodiments, a system in accordance with the present technology can include (i) an aspiration catheter configured to be positioned within the vasculature of a patient proximate to clot material therein, (ii) an aspiration assembly selectively fluidly couplable to the aspiration catheter, (iii) a filter assembly selectively fluidly couplable to the aspiration assembly, (iv) a reinfusion and flushing assembly selectively fluidly couplable to the filter assembly, (v) a reinfusion catheter selectively fluidly couplable to the reinfusion and flushing assembly and configured to be positioned within the vasculature, and (vi) a control system communicatively coupled to the aspiration assembly, the filter assembly, and / or the reinfusion and flushing assembly.

The embodiment of the invention provides an expansion catheter device. The dilation catheter device comprises a catheter body assembly and a balloon body assembly. The pipe body assembly comprises a first pipe body and a second pipe body which extend in the same axial direction and can move relative to the axial direction. The second pipe body penetrates through the first pipe body. The balloon body assembly comprises an expansion balloon body and an interception balloon body which are arranged at the far end of the second tube body at an interval; the expansion bag body and the interception bag body are arranged in an expandable or contractible mode. Wherein the expansion bag body and the interception bag body are used for inputting filler to expand when the bag body assembly is exposed out of the first tube body along with relative axial movement, and a thrombus interception space is defined by the expansion bag body and the interception bag body and the blood vessel wall, so that at least part of thrombus extruded by the expansion bag body enters the thrombus interception space; and the first tube body enters the thrombus interception space to perform thrombus suction action. The expanded intercepting capsule body can intercept part of thrombus which falls off due to extrusion, and the thrombus is prevented from flowing to the far end of a blood vessel and causing embolism; and the first tube body can also suck the intercepted part of thrombus out of the body.

The application discloses a kind of thrombus suction control method and thrombus suction device, and thrombus suction device includes suction assembly, suction assembly includes the shell with pressure cavity, piston rod and suction catheter, thrombus suction device also includes the motor of piston rod movement and the controller connected with motor, control method is: suction catheter is positioned to the blood vessel without thrombus, make motor operate according to speed V0, calibrate the pressure value B in pressure cavity under normal blood condition;Suction catheter is positioned to the blood vessel with thrombus, make motor operate according to speed V1, V1≤V0, make dynamic pressure value A0 in pressure cavity: when A0≤B, make motor keep speed V1 operation;When A0>B, make motor increase from speed V1: when B<A0≤C, make motor increase to speed V2 operation;When C<A0≤D, make motor increase to speed V3 operation;When D<A0≤E, make motor increase to speed V4 operation.The control method thrombus removal efficiency is high, and blood loss can be reduced.

The thrombus aspiration catheter comprises a catheter body and a deformation structure, and the deformation structure comprises a plurality of supporting rings and deformation assemblies arranged between every two adjacent supporting rings; when the axial distance between every two adjacent supporting rings is reduced, the deformation assembly deforms inwards in the radial direction, and the deformation assembly and the two adjacent supporting rings jointly form a variable-diameter channel with the inner diameter firstly decreasing and then increasing from far to near. When the axial distance between every two adjacent supporting rings is increased, the deformation assemblies deform and recover in the radial direction, and the minimum inner diameter of a channel formed by the deformation assemblies and the two adjacent supporting rings is correspondingly increased. The variable-diameter channel can form mechanical wrapping and clamping on the thrombus at the position with the minimum inner diameter, and thrombus escape or far-end embolism in the suction process is effectively prevented; meanwhile, the structure is beneficial for forming a negative pressure enhancing cavity at the far end of the catheter body, and stable grasping and concentrated efficient suction of the thrombus are achieved.

The liquid storage tank comprises a tank body and a tank cover, the tank cover is installed at the top of the tank body, a liquid inlet and an air outlet are formed in the top of the tank cover, a floating support is installed at the bottom of the tank cover and located below the air outlet, a floating groove is formed in the floating support, and a liquid outlet is formed in the floating groove. The floating groove is communicated with the air outlet, and a buoy is installed in the floating groove in a sliding mode. According to the blood storage tank, the air outlet is connected with an external thrombus suction pump, the liquid inlet is connected with an external matched thrombus suction catheter, the other end of the thrombus suction catheter is inserted into a blood vessel of a human body, and the end of the thrombus suction catheter reaches the thrombus. The buoyancy of the blood can enable the buoy to move upwards, so that the buoy blocks the air outlet, the blood can be prevented from entering a pump connected with the liquid storage tank through the air outlet, and the pump is prevented from being damaged due to the fact that liquid enters the pump.

The application provides a medical catheter, comprising: a catheter seat comprising a first communication interface and a second communication interface; a tube body, an inside of the tube body being provided with a suction channel and a liquid channel, a proximal end of the suction channel being in communication with the first communication interface, a distal end of the suction channel being open at a distal end of the tube body, a proximal end of the liquid channel being in communication with the second communication interface, and a distal end of the liquid channel being in communication with the distal end of the suction channel. By using the medical catheter, the thrombus suction efficiency is improved, and the medical catheter is suitable for removing thrombus of various shapes and textures.

Systems for use in blood clot removal can comprise a first tube, a second tube slidable within the first tube, and a self-expanding receiver having a membrane and positioned at least partially within the second tube. When the second tube and a proximal portion of the receiver are positioned within a distal end portion of the first tube and the second tube is moved proximally relative to the receiver until a distal end of the second tube is positioned proximally of a proximal end of the receiver, the proximal portion of the receiver can radially expand and make contact with the distal end portion of the first tube and a distal portion of the receiver can radially expand such that it has an inner diameter that is at least 10% larger than an inner diameter of the first tube.

The present invention relates to a thrombus aspiration catheter, comprising: an aspiration tube extending along an axis and having an aspiration port at a distal end; the guide wire tube is connected to the far-end side of the suction tube, the near-end side of the guide wire tube is fixed to the periphery of the suction tube, the part, overlapped with the suction tube, of the guide wire tube forms a connecting section, and the part, extending towards the far end, of the guide wire tube forms a suspended section; the flexural rigidity of the suction section and the flexural rigidity of the guide wire tube are both smaller than the flexural rigidity of the main body section; or the inner wall of the suction tube is provided with a sliding groove extending to the far end along the axis, the far end of the sliding groove is provided with a containing section, and the far end of the connecting rod is fixed to the near end of the guide wire tube. Through deformation of the guide wire tube or embedding of the guide wire tube into the tube wall of the suction tube, the guide wire can be used for guiding to quickly reach the preset position, the sectional area of the suction cavity of the suction tube is not damaged, and the suction efficiency and the pushing performance of the suction tube can be improved at the same time.

The present invention relates to the field of medical machinery, and provides a thrombus aspiration catheter, comprising: a catheter, one end of which is provided with a conical structure, the conical structure being provided with a suction port, and a connection port being provided on the tube wall of the catheter; a spiral structure being provided in the catheter; a mounting seat and a rotating wheel, the mounting seat being provided with a mounting hole, the rotating wheels being provided as a pair, the rotating wheels being rotatably mounted on the mounting seat, the mounting seat being provided with a channel connected to the mounting hole, and the outer wall of the mounting seat being provided with a through hole connected to the channel; four filaments, each of which is connected to one end of the catheter provided with the conical structure, each of which passes through the catheter, the mounting hole, the channel, and the through hole in sequence, and two opposing filaments being provided as a pair, each pair of filaments being wound in opposite directions on corresponding rotating wheels. By loosening or reeling the filaments on the rotating wheels, the filaments can pull the catheter, causing the catheter to bend, thereby achieving the effect of actively adjusting the forward direction of the catheter, eliminating the need for a guidewire, reducing the difficulty of operation, and shortening the operation time.

The invention discloses a self-adaptive aspiration system and method based on lumen state recognition, and relates to the field of thrombus aspiration, and the system comprises an air pressure sensor and an aspiration controller. The air pressure sensor is arranged in the suction catheter and used for collecting the air pressure value of the suction catheter in real time when the catheter cavity is sucked. The suction controller is connected with the air pressure sensor and the suction part and used for recognizing the state of the thrombus in the lumen according to the air pressure value of the suction catheter and adjusting the running state of the suction part according to the state of the thrombus in the lumen so that the thrombus in the lumen can be sucked through the suction catheter. The thrombus in the lumen can be sucked in a self-adaptive mode according to the state of the thrombus in the lumen, the thrombus suction efficiency is improved, the problem that when pure blood exists in the lumen, continuous suction causes a large amount of blood loss is avoided, and the thrombus suction safety is improved.

The invention relates to the technical field of medical instruments, and discloses a blood vessel intracavity plaque rotary cutting and thrombus aspiration integrated device which comprises a guiding tube and a rotary cutting tube, the rotary cutting tube abuts against the lower portion of the guiding tube, and a connecting mechanism is arranged between the ends, close to each other, of the guiding tube and the rotary cutting tube. The guiding pipe and the rotary cutting pipe are in limiting connection through a connecting mechanism, a miniature double-shaft motor is installed in the lower end of the rotary cutting pipe, the output end of the lower side of the miniature double-shaft motor is fixedly sleeved with a rotary cutting knife, a cavity is formed in one side of the rotary cutting pipe, and a suction inlet is formed in the lower end of the cavity; a fixing shell is fixedly arranged on the inner wall of one side of the middle end of the rotary cutting pipe, and a piston is arranged in the fixing shell in a sliding mode. According to the intravascular plaque rotary cutting and thrombus suction integrated device, after plaque rotary cutting is conducted, thrombus can be directly sucked out, suction equipment does not need to be inserted for the second time, the working efficiency can be greatly improved, and the pain of a patient is relieved.

The invention discloses a thrombus aspiration catheter with a reducing balloon and a preparation method, and relates to the technical field of medical instruments. The suction catheter comprises a catheter main body, a compliance balloon, two Luer tapers and two developing rings, the double-cavity structure of the catheter main body comprises a thrombus suction cavity and a balloon pressurization cavity; the compliance balloon is fixedly mounted at the far end of the catheter main body, and the compliance balloon is communicated with the balloon pressurizing cavity; the catheter body is provided with a reducing area with the near-end inner diameter smaller than the far-end inner diameter in the axial direction. The two developing rings are respectively embedded in the catheter main body corresponding to the two sides of the compliance balloon; the two Luer tapers are respectively a first Luer taper and a second Luer taper, the first Luer taper is communicated with the thrombus aspiration cavity, and the second Luer taper is communicated with the balloon pressurization cavity so as to input pressure into the balloon pressurization cavity. By means of the balloon adherence, the plugging effect is improved, the suction efficiency is improved, the thrombus falling risk is reduced, and the catheter in-place performance and the operation flexibility are improved.

Disclosed herein are pneumatic syringes and associated systems and methods. A pneumatic syringe in accordance with the present technology can include a syringe barrel, a pneumatic barrel, and a plunger assembly extending between and movably positioned within the syringe barrel and the pneumatic barrel. The pneumatic syringe can further include a control unit configured to direct a flow of pressurized fluid from a fluid source into the pneumatic barrel to cause the plunger assembly to move between a withdrawn position and a depressed position within the syringe barrel. To move to the withdraw position, the control unit can direct the flow of pressurized fluid into a distal chamber of the pneumatic barrel to drive the plunger assembly proximally. To move to the depressed position, the control unit can direct the flow of pressurized fluid into a proximal chamber of the pneumatic barrel to drive the plunger assembly distally.

This invention provides a thrombus aspiration catheter with a variable distal inner diameter, belonging to the field of interventional surgical instrument technology. The catheter includes an interventional catheter, an operating handle, and a collection component. The interventional catheter is used to move along the blood vessel to approach the thrombus location. The operating handle is located at the proximal end of the interventional catheter to provide suction force. The collection component is located at the distal end of the interventional catheter, with its proximal end communicating with the interventional catheter and its distal end open and adjustable in diameter. When the interventional catheter moves along the blood vessel to approach the thrombus, the diameter of the collection component is in a contracted state and not larger than the diameter of the interventional catheter. After the collection component reaches its position, it expands to increase its distal diameter for overall thrombus aspiration. This invention primarily addresses the technical problems of existing small-diameter thrombus aspiration catheters, which suffer from insufficient suction force, require repeated aspiration, and are prone to thrombus escape, while large-diameter catheters have poor permeability and are difficult to reach the lesion site.

The utility model provides an intravascular thrombus aspiration catheter. The intravascular thrombus aspiration catheter comprises an internal flow channel, a far-end aspiration catheter section, a middle catheter section and a near-end driving catheter section, and the internal flow channel is sequentially communicated with the far-end aspiration catheter section, the middle catheter section and the near-end driving catheter section from the far end of the intravascular thrombus aspiration catheter to the near end of the intravascular thrombus aspiration catheter. Wherein the intravascular thrombus aspiration catheter further comprises an aspiration inlet and an outflow window, and the internal flow channel is communicated with the aspiration inlet and the outflow window; a filter screen is arranged in an inner flow channel of the middle guide pipe section and is positioned between the suction inlet and the outflow window; at least one of the far-end suction catheter section, the middle catheter section and the near-end driving catheter section is detachably connected, and the suction inlet is formed in the far-end suction catheter section. According to the intravascular thrombus aspiration catheter provided by the invention, due to the segmented detachable design, the use convenience is facilitated.

A dynamic aspiration system includes a vacuum source, an aspiration catheter, a connecting tube, controllable valves to control a level of pressure in the aspiration catheter or the connecting tube, pressure sensors to detect pressure readings, and a controller capable of utilizing an artificial neural network (ANN) trained to predict flow state classifications. The controller may receive pressure readings from the sensors, provide the pressure readings as input data for the ANN, classify, via the ANN, a current flow state in the aspiration catheter or the connecting tube based on outputs generated by the ANN, and operate the controllable valves based on the classification of the current flow state. The controller operates the controllable valves in a first pressure protocol if the classification by the ANN is restricted or obstructed, and operates the controllable valves in a second pressure protocol if the classification by the ANN is unrestricted.

The invention provides a thrombus aspiration catheter, and belongs to the technical field of interventional instruments. Comprising a catheter body, a suction opening is formed in the far end of the catheter body, a guide unit is arranged at the far end of the catheter body, and the guide unit is configured to be capable of being controllably switched between a guide state and a suction state so as to dynamically meet the requirements of different operation stages; wherein in the process that the catheter body advances along a blood vessel, the guide unit keeps a guide state that the radial size is gradually reduced in the extension direction from the near end to the far end; after the catheter body reaches a target position, the far end of the guide unit is bent towards the near end of the catheter body and used for exposing the suction opening to enter a suction state; the thrombus aspiration catheter is mainly used for solving the technical problems that when an existing thrombus aspiration catheter is delivered through a middle auxiliary catheter, operation is tedious, and operation efficiency is affected.

The invention provides an intravascular thrombus aspiration catheter. The intravascular thrombus aspiration catheter comprises an internal flow channel, a far-end aspiration catheter section, a middle catheter section and a near-end driving catheter section, and the internal flow channel is sequentially communicated with the far-end aspiration catheter section, the middle catheter section and the near-end driving catheter section from the far end of the intravascular thrombus aspiration catheter to the near end of the intravascular thrombus aspiration catheter. Wherein the intravascular thrombus aspiration catheter further comprises an aspiration inlet and an outflow window, and the internal flow channel is communicated with the aspiration inlet and the outflow window; a filter screen is arranged in an inner flow channel of the middle guide pipe section and is positioned between the suction inlet and the outflow window; at least one of the far-end suction catheter section, the middle catheter section and the near-end driving catheter section is detachably connected, and the suction inlet is formed in the far-end suction catheter section. According to the intravascular thrombus aspiration catheter provided by the invention, due to the segmented detachable design, the use convenience is facilitated.

Methods and apparatuses for blood clot aspiration. Described are fluid management components and assemblies for blood clot extraction from a patient's body and for filtering blood and recirculating blood back into the patient's body. Also disclosed is a vent system including a common vent line (1508) to fluidly couple a reservoir (1403), a clot capture chamber (1405) and a blood return syringe (1409).

Disclosed herein are devices, systems, and methods for at least partially automatically aspirating clot material and blood from the vasculature of a patient, filtering the blood from the clot material, and returning the blood to the vasculature of the patient. In some embodiments, a system in accordance with the present technology can include (i) an aspiration catheter configured to be positioned within the vasculature of a patient proximate to clot material therein, (ii) an aspiration assembly selectively fluidly couplable to the aspiration catheter, (iii) a filter assembly selectively fluidly couplable to the aspiration assembly, (iv) a reinfusion and flushing assembly selectively fluidly couplable to the filter assembly, (v) a reinfusion catheter selectively fluidly couplable to the reinfusion and flushing assembly and configured to be positioned within the vasculature, and (vi) a control system communicatively coupled to the aspiration assembly, the filter assembly, and / or the reinfusion and flushing assembly.

This application provides a thrombus aspiration catheter and catheter assembly. The thrombus aspiration catheter includes: a tube body having an inner lumen with a first central axis; the inner lumen is divided into an aspiration chamber and a guidewire chamber that are not interconnected in a direction perpendicular to the first central axis; the guidewire chamber has a second central axis that is offset from the first central axis. The sidewall of the tube body is provided with multiple rows of holes spaced apart along the axial direction of the tube body. Each row of holes includes multiple side holes spaced apart along the circumference of the tube body. Each side hole communicates with the aspiration chamber, and the diameter of the multiple side holes increases with the vertical distance between the center of the multiple side holes and the second central axis. The thrombus aspiration catheter of this application embodiment can improve the stability of fluid flow within the tube body.

The utility model discloses a thrombus aspiration device, which belongs to the technical field of medical instruments and structurally comprises a first connecting piece and a soft needle head, a Luer taper is arranged at the front end of the first connecting piece, an outer needle tube is fixedly connected to the outer side of the soft needle head, a plurality of grooves are formed in the outer needle tube, and the first connecting piece is fixedly connected with the soft needle head. A rotating piece is arranged on the outer side needle tube, a cavity in the soft needle head is set to be a first cavity, and a cavity between the soft needle head and the outer side needle tube is set to be a second cavity. Negative pressure in the second cavity is adjusted through the second pressure control structure, negative pressure is generated in the second cavity through the third connecting piece, the rotating piece deflects, the groove has adsorption force, one end of the rotating piece has a blocking function in cooperation with deflection of the rotating piece, thrombus enters the second cavity after being adsorbed by the groove, and the thrombus is prevented from entering the second cavity. Thrombus is discharged through the third connecting piece and the second connecting piece, and the situation that thrombus blocks flow to all positions of the blood vessel is reduced.

The utility model relates to a thrombus removing device for the coronary artery. The thrombus removing device comprises a suction device and a thrombus taking support movably connected with the suction device. The thrombus extraction stent is of a self-expansion structure, at least three barbs are arranged on the inner side of the self-expansion structure, and the free ends of the barbs face the near end; bulges capable of increasing the surface roughness are arranged on the surfaces of the barbs and the self-expansion structures; the barbs are distributed in a spiral manner; the suction device comprises a suction guide pipe, and the end face of a suction opening of the suction guide pipe is an inclined face. The thrombus extraction support is located in the suction catheter and is adjacent to the inner wall of the suction catheter. According to the thrombus removing device for the coronary artery, thrombus suction and capturing are combined, the viscosity between thrombus and the thrombus removing device is enhanced by means of the special barbs spirally distributed on the self-expansion structure and the protrusions capable of increasing the surface roughness, and it is guaranteed that the thrombus is firmly captured and removed.