CN115153750A

CN115153750A - Mechanical thrombectomy device and use method

Info

Publication number: CN115153750A
Application number: CN202210900190.7A
Authority: CN
Inventors: 冯海全; 殷晓航; 刘文芝; 冯浩翔
Original assignee: Inner Mongolia University of Technology
Current assignee: Inner Mongolia University of Technology
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-10-11

Abstract

The invention discloses a mechanical thrombectomy device and a use method thereof, belonging to the technical field of medical instruments and comprising the following steps: a damming assembly, a delivery conduit and an outer conduit; the outer wall of the conveying conduit is movably arranged in the outer conduit in a penetrating way, the inner part of the near end of the conveying conduit is provided with a stopping component in a sliding way, and the far end of the conveying conduit is connected with an ultrasonic generator; the stopping assembly comprises a net basket and a push-pull guide wire, the far end of the net basket is connected with the push-pull guide wire, and the push-pull guide wire penetrates out of the conveying catheter along the axis of the conveying catheter; the cutting cutter head is rotatably arranged at the end part of the near end of the outer conduit, the power assembly is arranged at the far end of the cutting cutter head and on the outer conduit, the near end of the power assembly is connected with the cutting cutter head, and the outer wall of the outer conduit is also provided with the suction assembly. The invention can remove thrombus at multiple angles, the cutting range is from small to large, the safety of removing the thrombus is effectively improved, the injury to blood vessels is reduced, and the clearance rate of the thrombus is improved.

Description

Mechanical thrombectomy device and use method

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a mechanical thrombectomy device and a using method thereof.

Background

Modern people have high pace of life, increased pressure, irregular living habits, less exercise amount, smoking, drinking and other inducements, so that the incidence of cardiovascular diseases in China is continuously improved in recent years, wherein the thrombotic diseases seriously threaten the physical health of people. The formation of thrombus causes local swelling or pain at a light rate, and severe pain, hemiplegia, shock and other symptoms at a heavy rate, so that the survival of limbs is endangered and the life safety is threatened.

The treatment of thrombus includes drug treatment, operation treatment, mechanical thrombus removal treatment and the like. The mechanical thrombus removal is an important thrombus removal method in recent years, and can accurately and thoroughly remove thrombus at a specific part, so that the smoothness of a blood vessel is recovered.

Most of the existing mechanical thrombus removing devices have the following defects in the thrombus removing process: when thrombus is cleaned, the thrombus is required to reciprocate in the blood vessel for multiple times, the blood vessel is probably damaged in the operation process, the efficiency is low, and the thrombus removal time is long; the minced, finely divided thrombus, because it cannot be immediately intercepted and removed from the vessel, can cause embolization of the vessel at the distal end with serious consequences. In addition, the cutting part of the broken thrombus structure is manually operated, and the thrombus is generally pulled out in the thrombus removing process, so that the thrombus can be integrally pulled out in the form of the whole broken thrombus, the blood vessel can be damaged, the risk is high, and the controllability is poor.

Disclosure of Invention

The invention provides a mechanical thrombectomy device, which solves the problems and is realized by the following technical scheme.

The invention aims to provide a mechanical thrombectomy device, which comprises:

a barrier assembly, a delivery conduit and an outer conduit; the outer wall of the conveying conduit is movably arranged in the outer conduit in a penetrating way, the stopping component is arranged inside the near end of the conveying conduit in a sliding way, and the far end of the conveying conduit is connected with an ultrasonic generator;

the stopping assembly comprises a net basket and a push-pull guide wire, the far end of the net basket is connected with the push-pull guide wire, and the push-pull guide wire penetrates out of the conveying catheter along the axis of the conveying catheter; a cutting cutter disc is rotatably arranged at the end part of the near end of the outer catheter, a power assembly is arranged at the far end of the cutting cutter disc and on the outer catheter, the near end of the transmission catheter is connected with the cutting cutter disc, and a suction assembly is further arranged on the outer wall of the outer catheter;

after the conveying catheter penetrates into thrombus in a blood vessel, the push-pull guide wire is pushed to push the net basket out, the net basket intercepts and cuts up thrombus in the blood vessel in an open state, the power assembly provides a power source to enable the cutting cutter disc to rotate to cut up the thrombus, the ultrasonic generator ultrasonically assists in cutting up the thrombus, the suction assembly enables the outer catheter to form negative pressure to suck up the cut-up thrombus, and the outer catheter is discharged to achieve the purpose of cutting off the thrombus.

Preferably, the mechanical thrombectomy device is provided with a visualization mark at an end of the connecting end of the basket and the push-pull guide wire.

Preferably, in the mechanical thrombectomy device, the basket is a retractable net structure and has an open state and a compressed state, when the basket is in the open state, the basket is in a cone shape, the far end is in an open state, and the near end is in a closed state, when the basket is in the compressed state, the basket is in a net pipe shape, and the far end and the near end are both in a closed state.

Preferably, in the mechanical thrombectomy device, an ultrasonic transmission ring is arranged inside the proximal end of the delivery catheter, a transmission guide wire is arranged inside the cross section of the delivery catheter, the ultrasonic transmission ring is connected with the proximal end of the transmission guide wire, and the distal end of the transmission guide wire is connected with the proximal end of the ultrasonic generator;

the far end of the conveying catheter is provided with an operating handle, the far end of the operating handle is connected with the near end of the ultrasonic generator, and the push-pull guide wire is arranged in the conveying catheter along the axis of the conveying catheter and penetrates out of a port at the end of the operating handle.

Preferably, in the mechanical thrombectomy device, the outer wall of the transmission catheter and the inner part of the outer catheter are provided with spiral guide structures, the side wall of the far end of the outer catheter is rotatably provided with guide wire adjusting knobs, at least 4 adjusting guide wires are uniformly distributed on the cross section of the outer catheter, the near ends of all the adjusting guide wires are connected with the near end of the outer catheter, and the far ends of the adjusting guide wires are connected with the guide wire adjusting knobs;

the power assembly comprises a transmission conduit and a motor, the transmission conduit is rotatably arranged in the outer conduit, the motor is of a hollow shaft structure and is arranged on the outer conduit, the output end of the motor is connected with the far end of the transmission conduit, the near end of the transmission conduit is connected with the cutting cutter head, and the motor is further connected with a motor switch and a motor power line.

Preferably, in the mechanical thrombectomy device, the conveying conduit is movably arranged in the central hole of the cutting cutter disc and the transmission conduit in sequence, and the penetrating part of the conveying conduit is connected with the operating handle, and the conveying conduit, the transmission conduit and the motor are coaxial.

Preferably, above-mentioned mechanical type thrombectomy device, the suction subassembly includes suction pump and suction tube, the one end of suction tube with outer catheter intercommunication, the other end with the suction pump intercommunication, still be provided with the thrombus on the suction pump and retrieve the bag, be used for retrieving the thrombus of suction pump suction.

Preferably, above-mentioned mechanical type thrombus resection device, the center of cutting blade disc is provided with the centre bore, the conveying pipe runs through the centre bore and wear out the part and wear to locate with mobilizable mode in the outer pipe, on the cutting blade disc with the outer wall of centre bore is provided with the mounting groove, the mounting groove with the transmission pipe is connected.

Preferably, above-mentioned mechanical type thrombus resection device, the periphery of centre bore annular array is provided with a plurality of cutting edge A, a plurality of passageway A and a plurality of passageway B on the cutting blade disc, every cutting edge A's adjacent both sides are provided with one respectively passageway A and one passageway B, one passageway B constitutes for the little fan-shaped passageway that two symmetries set up, two between the little fan-shaped passageway still the equipartition is provided with a plurality of cutting edge B on the cutting blade disc.

The invention also provides a using method of the mechanical thrombectomy device, which comprises the following steps:

s1, slowly penetrating the conveying catheter and the outer catheter into a blood vessel with thrombus, pushing the conveying catheter to move axially in the blood vessel to be close to the thrombus after the conveying catheter and the outer catheter reach the vicinity of the thrombus, then continuously pushing the conveying catheter to penetrate through the thrombus, and enabling the penetrated part to be far away from the thrombus;

s2, pushing out the basket in a compressed state in the conveying catheter by pushing the push-pull guide wire, wherein the basket can be in an open state in a blood vessel to play a role in intercepting fine thrombus, turning on the ultrasonic generator, and transmitting ultrasonic waves to the part of the thrombus through the conveying catheter so as to achieve the purpose of assisting thrombus crushing;

s3, after the transmission catheter rotates, the movable cutting cutter head rotates, the outer catheter is pushed to move forwards slowly along the transmission catheter, the outer catheter is enabled to be close to thrombus and thrombus blocks are cut and shredded gradually, the suction assembly is started, and the outer catheter forms negative pressure suction of the shredded thrombus through the suction assembly;

s4, after the thrombus is broken, pulling the push-pull guide wire to enable the basket to return to the conveying catheter again to be in a compressed state, taking the fine thrombus in the basket out of the blood vessel, closing the suction assembly, slowly withdrawing the whole thrombus removal device out of the blood vessel, and completing thrombus removal operation.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention adopts a conveying catheter to penetrate thrombus in a blood vessel, pushes a push-pull guide wire to push out a basket, the basket intercepts and cuts thrombus in the blood vessel in an open state, a basket structure is arranged in an intercepting assembly, the basket can slowly open in the blood vessel, the basket is in a cone cylinder shape in the open state, the contact surface with the blood vessel wall is large, the injury to the blood vessel can not be caused, the fine thrombus generated in the cutting process can be intercepted, the cut fine thrombus can be prevented from being intercepted in time and removed out of the blood vessel, the thrombus embolism at the far end can be avoided, a cutting cutter disc is used for cutting the thrombus, an ultrasonic generator ultrasonic-assisted thrombus cutting assembly enables an outer catheter to form negative pressure suction cut thrombus, the thrombus is cut, the cut thrombus is sucked into a collecting device, the problem that the blood vessel is likely to be damaged in the operation process due to the fact that the cut thrombus needs to reciprocate in the blood vessel many times when the thrombus is cleaned is avoided, the efficiency is low, and the thrombus taking time is long.

2. Compared with the integral pulling type thrombus removal mode, the invention adopts the electric cutting cutter disc driven by the motor to achieve the purpose of cutting thrombus, and the cutting cutter disc is connected with the motor through the transmission conduit; compared with manual cutting, the electric cutting has higher efficiency, can greatly reduce the overall time of interventional therapy, improves the efficiency, enlarges the cutting range, and has higher safety in removing thrombus.

3. According to the guide wires arranged in the conveying catheter, the lengths of all the guide wires are adjusted through the adjusting knob, so that the change of the angle of the near end of the conveying catheter can be realized, and the thrombus can be cut at multiple angles.

Drawings

FIG. 1 is a schematic view of the overall structure of the mechanical thrombectomy device of the present invention;

FIG. 2 is a schematic view of the internal structure of a catheter section of the present invention;

FIG. 3 is a schematic view of the construction of the thrombus barrier assembly of the present invention;

FIG. 4 is a perspective view of a cutter head of the present invention;

FIG. 5 is a front and rear view of a cutting head according to the present invention;

FIG. 6 is a schematic view of the structure of the motor portion and the duct portion of the present invention;

FIG. 7 is a schematic cross-sectional view of an outer catheter in accordance with the present invention;

FIG. 8 is a schematic view showing the operation of removing thrombus by the thrombus removal device of the present invention.

Description of reference numerals:

1. the thrombus recovery device comprises a blocking component 1-1, a mesh basket 1-2, a push-pull guide wire 1-3, a developing mark 2, a conveying catheter 2-1, an ultrasonic wave transmission ring 2-2, a transmission guide wire 2-3, an operation handle 3, an outer catheter 3-1, a cutting cutter head 3-1-1, a central hole 3-1-2, a mounting groove 3-1-3, a cutting edge A3-1-4, a channel A3-1-5, a channel B3-1-6, a cutting edge B3-2, a transmission catheter 3-3, a spiral guide structure 3-4, a guide wire adjusting knob 3-5, an adjusting guide wire 3-6, a motor 3-7, a motor switch 3-8, a motor power line 3-9, a suction pump 3-10, a thrombus recovery bag 4 and an ultrasonic wave generator.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention to be implemented, the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

In the description of the present invention, it should be noted that the terms "proximal", "distal", "inside", "outside", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

The present invention provides a mechanical thrombus removal device, as shown in fig. 1 to 8, comprising: a damming assembly 1, a conveying conduit 2 and an outer conduit 3; the outer wall of the conveying conduit 2 is movably arranged in the outer conduit 3 in a penetrating way, the far end of the conveying conduit is connected with an ultrasonic generator 4, and the inner part of the near end of the conveying conduit 2 is provided with a stopping component 1 in a sliding way; as shown in fig. 3, the arresting component 1 comprises a basket 1-1 and a push-pull guide wire 1-2, the distal end of the basket 1-1 is connected with the push-pull guide wire 1-2, the push-pull guide wire 1-2 passes through the delivery catheter 2 along the axis of the delivery catheter 2, the basket 1-1 is a wire mesh, the wire mesh can be a stainless steel mesh, a nickel-titanium alloy mesh, a cobalt-chromium alloy mesh or a titanium alloy mesh, in this embodiment, the basket 1-1 is a nickel-titanium alloy mesh; as shown in fig. 2, a cutting cutter disc 3-1 is rotatably arranged at the end of the proximal end of the outer catheter 3, a power assembly is arranged on the outer catheter at the distal end of the cutting cutter disc, the proximal end of the power assembly is connected with the cutting cutter disc 3-1, and a suction assembly is further arranged on the outer wall of the outer catheter 3; after the delivery catheter 2 penetrates thrombus in a blood vessel, the push-pull guide wire 1-2 is pushed to push the net basket 1-1 out, the net basket 1-1 intercepts and cuts the thrombus in the blood vessel in an open state, the power assembly provides a power source to enable the cutting cutter head 3-1 to rotate to cut the thrombus, the ultrasonic generator 4 ultrasonically assists in cutting the thrombus, and the suction assembly enables the outer catheter 3 to form negative pressure to suck the cut thrombus and discharge the outer catheter 3 to achieve the purpose of cutting the thrombus.

The arresting component 1 mainly has the function of arresting the generated fine thrombus in the process of cutting the thrombus and preventing the fine thrombus from flowing to the far end of the blood vessel to generate embolism. The delivery catheter 2 is movably arranged in the outer catheter 3 in a penetrating way, and the main function of the delivery catheter is to enable the delivery catheter to penetrate thrombus so as to release a basket in the delivery catheter; and secondly, the cutting tool disc plays a role in guiding and needs to move forwards along the conveying catheter to cut thrombus.

Specifically, as shown in fig. 1 and 3, a development mark 1-3 is provided at an end of the connection end of the basket 1-1 and the push-pull guide wire 1-2. The developing marks 1-3 are mainly used for accurately positioning the net basket 1-1 and the conveying catheter 2 in the thrombus integral removing device, and the operator can clearly observe the positions of the net basket 1-1 and the conveying catheter 2 in the blood vessel under X rays through the developing marks 1-3, and can accurately and thoroughly complete the whole thrombus cutting and removing work.

Specifically, as shown in fig. 1-3, the basket 1-1 is a collapsible mesh structure having an open state and a compressed state, and when in the open state, the basket 1-1 is in a cone shape, the distal end of the basket 1-1 is in an open state, and the proximal end of the basket 1-1 is in a closed state; when in a compressed state, the net basket 1-1 is in a net pipe shape, and the far end and the near end are both in a closed shape. The net basket 1-1 is a retractable net-shaped structure and is adjustable in size; the mesh basket 1-1 is made of nickel-titanium alloy wires through heat setting, is in an unfolded state in a natural state, and has the largest diameter; the diameter of the recovered material is the minimum in the contraction state in the conveying conduit 2; the diameter is in the middle when partly withdrawn into the conveying conduit 2, so that the basket 1-1 can be partly withdrawn through the conveying conduit 2 for the purpose of size adjustment. The mesh basket 1-1 is mainly used for intercepting the generated fine thrombus in the thrombus cutting process and preventing the fine thrombus from flowing to the far end of a blood vessel to generate embolism, and when the mesh basket 1-1 does not work, the mesh basket 1-1 is in a compressed state and is positioned in the near end of the conveying catheter 2; when the portable type blood vessel stent is in work, the portable type blood vessel stent can slide and extend out of the conveying catheter 2 under the pushing of the push-pull guide wire 1-2, the basket 1-1 is in an open state and is attached to a blood vessel and is in a cone cylinder shape, the far end of the basket 1-1 is in an opening shape, the near end of the basket 1-1 is in a closed shape, the contact area with the blood vessel wall is large, the blood vessel cannot be injured, the effect of intercepting fine and broken thrombus is achieved, and the real-time position of the basket can be judged under the auxiliary positioning of the developing marks 1-3 in the extending process.

Specifically, an ultrasonic transmission ring 2-1 is arranged inside the near end of the conveying catheter 2, a transmission guide wire 2-2 is arranged inside the cross section, the ultrasonic transmission ring 2-1 is connected with the near end of the transmission guide wire 2-2, and the far end of the transmission guide wire 2-2 is connected with the near end of an ultrasonic generator 4. Ultrasonic waves are transmitted through the transmission guide wire 2-2, the other end of the transmission guide wire 2-2 is connected with a contact point in the section of the catheter at the end of the operating handle 2-3, and an interface contact point on the conveying catheter 2 is connected with a contact point of an interface of the ultrasonic generator 4, so that the transmission of the ultrasonic waves can be realized, and the aim of assisting bolt breaking is fulfilled. The distal end of the delivery catheter 2 is provided with an operating handle 2-3, the distal end of the operating handle 2-3 is connected with the proximal end of the ultrasonic generator 4, and the push-pull guide wire 1-2 is arranged in the delivery catheter 2 along the axis of the delivery catheter 2 and penetrates out of a port at the end of the operating handle 2-3. An operator holds the handle as the handle 2-3 to control the axial moving position of the conveying conduit 2.

Specifically, as shown in fig. 1, 2 and 6, the outer wall of the transmission catheter 3-2 and the inner part of the outer catheter 3 are provided with spiral guide structures 3-3, the far-end side wall of the outer catheter 3 is rotatably provided with guide wire adjusting knobs 3-4, at least 4 adjusting guide wires 3-5 are uniformly distributed on the cross section, as shown in fig. 7, all the guide wires 3-5 are directly wound on the guide wire adjusting knobs 3-4, or the guide wires 3-5 penetrate through the adjusting knobs 3-4 to be fixed, the near ends of all the adjusting guide wires 3-5 are connected with the near end of the outer catheter 3, and the far end is connected with the guide wire adjusting knobs 3-4. The outer catheter 3 moves axially along the conveying catheter, so that the cutting cutter head 3-1 can move forwards and backwards, and the spiral guide structure 3-3 mainly plays a role in conveying and guiding thrombus blocks; at least 4 guide wires 3-5 are arranged on the section of the outer catheter 3, and the lengths of all the guide wires 3-5 are controlled by adjusting knobs 3-4, so that the aim of adjusting the angle of the outer catheter 2 is fulfilled;

the power assembly comprises a transmission conduit 3-2 and a motor 3-6, the transmission conduit 3-2 is rotatably arranged in the outer conduit 3, the motor 3-6 is of a hollow shaft structure and is arranged on the outer conduit 3, the output end of the motor 3-6 is connected with the far end of the transmission conduit 3-2, the near end of the transmission conduit 3-2 is connected with the cutting cutter head 3-1, and the motor 3-6 is also connected with a motor switch 3-7 and a motor power line 3-8. The conveying conduit 2 penetrates through a center hole of the cutting cutter disc 3-1 and the transmission conduit 3-2 in sequence in a movable mode, a penetrating part of the conveying conduit 2 is connected with the operating handle 2-3, and the conveying conduit 2, the transmission conduit 3-2 and the motor 3-6 are coaxial. The motor 3-6 is used for providing a power source for the rotation of the cutting cutter disc 3-1, the near end of the transmission conduit 3-2 is connected with the cutting cutter disc, and the far end is connected with the motor 3-6 to play a role in transmission, so that the rotation of the cutting cutter disc 3-1 is realized; the motor 3-6 adopts a hollow shaft structure design, so that the motor 3-6 can extend out of a shaft section to be connected with the transmission conduit 3-2 to provide power for the cutting cutter head 3-1, and the transmission conduit 2 can pass through the transmission conduit, thereby ensuring the integrity of the transmission conduit 2.

The suction assembly comprises a suction pump 3-9 and a suction tube, one end of the suction tube is communicated with the outer catheter 3, the other end of the suction tube is communicated with the suction pump 3-9, and a thrombus recovery bag 3-10 is arranged on the suction pump 3-9 and used for recovering thrombus sucked by the suction pump 3-9. After the suction pump 3-9 is started, negative pressure is formed in the outer catheter 3 through the suction pipe after the suction pump 3-9 works, the suction pump 3-9 has the function of forming negative pressure in the outer catheter 3 to suck the cut thrombus out of the blood vessel, the suction pump 3-9 is also communicated with the thrombus recovery bag 3-10, and the sucked thrombus fragments are collected in the thrombus recovery bag 3-10 of the suction pump 3-9.

As shown in fig. 4-5, a center hole 3-1-1 is arranged in the center of a cutting cutter disc 3-1, a conveying conduit 2 penetrates through the center hole 3-1-1, a penetrating part penetrates through an outer conduit 3 in a movable mode, an installation groove 3-1-2 is arranged on the cutting cutter disc 3-1 and the outer wall of the center hole 3-1-1, and the installation groove 3-1-2 is connected with a transmission conduit 3-2. The central hole 3-1-1 is used for enabling the conveying guide pipe 2 to penetrate through the cutting cutter head 3-1, and enabling the cutting cutter head 3-1 to move along the axial direction of the conveying guide pipe 2; the connection of the mounting groove 3-1-2 and the transmission conduit 3-2 can be a fixed mode such as a hinge mode, a key connection mode and the like, in the embodiment, the connection mode is a hinge mode, and the transmission conduit 3-2 and the cutting cutter head 3-1 can be connected together. The periphery of the center hole 3-1-1 and the cutting cutter disc 3-1 are provided with a plurality of cutting edges A3-1-3, a plurality of channels A3-1-4 and a plurality of channels B3-1-5 in an annular array mode, two adjacent sides of each cutting edge A3-1-3 are respectively provided with one channel A3-1-4 and one channel B3-1-5, one channel B3-1-5 is formed by two small fan-shaped channels which are symmetrically arranged, and a plurality of cutting edges B3-1-6 are uniformly distributed between the two small fan-shaped channels and on the cutting cutter disc 3-1. Each cutting edge A3-1-3 is transversely arranged along the axial direction of the center hole 3-1-1 and the diameter direction of the cutting cutter disc 3-1 and is sequentially increased, the cutting edge at the outermost side is vertically arranged, each cutting edge B3-1-6 is transversely arranged along the axial direction of the center hole 3-1-1 and the diameter direction of the cutting cutter disc 3-1 and is identical in length, the number of the cutting edges is increased, the cutting capability of the cutter disc is improved, and all the cutting edges A3-1-3 and the cutting edges B3-1-6 are welded on the cutting cutter disc 3-1. Each channel A3-1-4 is a large fan-shaped channel, all the channels A3-1-4 and the channels B3-1-5 increase the space for cut thrombus fragments to enter the outer catheter 3, realize rotary motion under the driving of a motor 3-6, cut thrombus blocks through all the cutting edges A3-1-3 and all the cutting edges B3-1-6 on the cutting cutter head 3-1, cut thrombus enters the outer catheter 3 through all the channels A3-1-4 and all the channels B3-1-5 on the cutting cutter head 3-1, and the cut thrombus is sucked out of the outer catheter 3 under the negative pressure formed by a suction pump 3-9; thrombus fragment channels A3-1-4 and channels B3-1-5 with different sizes are arranged on the cutting cutter head 3-1, so that thrombus blocks with different sizes can smoothly pass through.

As shown in fig. 8, the use method of the thrombus removal device comprises the following steps:

s1, slowly penetrating a delivery catheter 2 and an outer catheter 3 into a blood vessel of thrombus, and enabling the delivery catheter 2 and the outer catheter 3 to reach the vicinity of the thrombus under the auxiliary positioning of developing marks 1-3; pushing the delivery catheter 2 to move close to the thrombus in the blood vessel along the axial direction by using the operating handle 2-3, then continuously pushing the delivery catheter 2 to penetrate through the thrombus, and enabling the penetrated part to be away from the thrombus for a certain distance;

s2, after the conveying catheter 2 reaches a designated position, pushing out the basket 1-1 in the conveying catheter 2 in a compressed state by pushing the push-pull guide wire 1-2, wherein the basket 1-1 can be slowly expanded in a blood vessel to be in an expanded state, and the expanded outer wall of the basket 1-1 is in contact with the wall of the blood vessel to intercept fine thrombus generated in the cutting process; the ultrasonic generator 4 is started, ultrasonic waves are transmitted to the ultrasonic transmission ring 2-1 through the transmission guide wire 2-2, and the ultrasonic waves of the ultrasonic transmission ring 2-1 are transmitted to the part of thrombus through the conveying catheter 2, so that the aim of assisting thrombus crushing is fulfilled;

s3, a power supply is connected through a motor power line 3-8, a motor switch 3-7 is pressed, a motor 3-6 in a power assembly is started, the motor 3-6 starts to work, the motor 3-6 transmits power through a transmission conduit 3-2, so that a cutting cutter disc 3-1 is driven to rotate, the outer conduit 3 is pushed to slowly move along the axial direction of a conveying conduit 2 to be close to thrombus, when the cutting cutter disc 3-1 is in contact with the thrombus, all cutting edges A3-1-3 and all cutting edges B3-1-6 of the cutting cutter disc 3-1 rotate to cut thrombus blocks, a suction pump 3-9 of a suction assembly is started, after the suction pump 3-9 is started, negative pressure is formed in the outer conduit 3 through a suction pipe, thrombus fragments on the cutting cutter disc 3-1 are sucked into the outer conduit 3 through all channels A3-1-4 and all channels A3-1-5 through the guide of a spiral guide structure 3-3, and then reach thrombus recovery bags 3-10 of the suction pump 3-9, thrombus is removed, blood vessels are dredged, the aim of adjusting the blood vessels is achieved, the lengths of the guide wires 3-4 are controlled through a knob, and the guide wires 3-5, and the cutting angles of the outer conduit 2 are adjusted, so that the thrombus is achieved;

s4, after the cutting cutter disc 3-1 finishes thrombus crushing, the motor 3-6 is closed, the push-pull guide wire 1-2 is pulled, the net basket 1-1 is retracted into the conveying conduit 2 to be in a compressed state, fine thrombus in the net basket 1-1 can be taken out of the blood vessel at the moment, the suction pump 3-9 is closed, and the whole thrombus cleaning device is slowly withdrawn out of the blood vessel until the thrombus removing operation is finished.

It should be noted that, the connection relationship of the components not specifically mentioned in the present invention is the default of the prior art, and the connection relationship of the structure is not described in detail since it does not relate to the invention point and is a common application of the prior art.

It should be noted that, when the present invention relates to numerical ranges, it should be understood that two endpoints of each numerical range and any value between the two endpoints can be selected, and since the steps and methods adopted are the same as those in the embodiment, in order to prevent redundancy, the present invention describes a preferred embodiment. While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A mechanical thrombectomy device, comprising: the device comprises a stopping component (1), a conveying conduit (2) and an outer conduit (3); the conveying catheter (2) is movably arranged in the outer catheter (3) in a penetrating mode, the stopping component (1) is arranged inside the near end of the conveying catheter (2) in a sliding mode, and the far end of the conveying catheter is connected with an ultrasonic generator (4);

the stopping assembly (1) comprises a basket (1-1) and a push-pull guide wire (1-2), the far end of the basket (1-1) is connected with the push-pull guide wire (1-2), and the push-pull guide wire (1-2) penetrates out of the conveying catheter (2) along the axis of the conveying catheter (2); a cutting cutter disc (3-1) is rotatably arranged at the end part of the near end of the outer conduit (3), a power assembly is arranged at the far end of the cutting cutter disc (3-1) and on the outer conduit (3), the near end of the power assembly is connected with the cutting cutter disc (3-1), and a suction assembly is further arranged on the outer wall of the outer conduit (3);

the conveying catheter (2) penetrates thrombus in a blood vessel, the push-pull guide wire (1-2) is pushed to push the mesh basket (1-1) out, the mesh basket (1-1) is in an open state in the blood vessel to intercept and cut thrombus, the power assembly provides a power source to enable the cutting cutter disc (3-1) to rotate to cut the thrombus, the ultrasonic generator (4) ultrasonically assists in cutting the thrombus, then the suction assembly enables the outer catheter (3) to form negative pressure suction on the cut thrombus, and the cut thrombus is discharged out of the outer catheter (3), so that the purpose of cutting the thrombus is achieved.

2. The mechanical thrombectomy device according to claim 1, wherein visualization marks (1-3) are provided at the end of the connecting end of the basket (1-1) and the push-pull guide wire (1-2).

3. The mechanical thrombectomy device according to claim 1, wherein the basket (1-1) is a collapsible net structure having an open state and a compressed state, wherein the basket (1-1) has a cone shape, a distal end is open and a proximal end is closed, and wherein the basket (1-1) has a mesh tube shape, and the distal and proximal ends are closed.

4. The mechanical thrombectomy device according to claim 1, wherein the proximal end of the delivery catheter (2) is internally provided with an ultrasonic transmission ring (2-1), the cross-section is internally provided with a transmission guide wire (2-2), the ultrasonic transmission ring (2-1) is connected with the proximal end of the transmission guide wire (2-2), and the distal end of the transmission guide wire (2-2) is connected with the proximal end of the ultrasonic generator (4);

the far end of the conveying catheter (2) is provided with an operating handle (2-3), the far end of the operating handle (2-3) is connected with the near end of the ultrasonic generator (4), and the push-pull guide wire (1-2) is arranged in the conveying catheter (2) along the axis of the conveying catheter (2) and penetrates out of a port at the end of the operating handle (2-3).

5. The mechanical thrombectomy device according to claim 4, wherein a spiral guide structure (3-3) is arranged on the outer wall of the transmission catheter (3-2) and inside the outer catheter (3), a guide wire adjusting knob (3-4) is rotatably arranged on the far-end side wall of the outer catheter (3), at least 4 adjusting guide wires (3-5) are uniformly distributed on the cross section, the near ends of all the adjusting guide wires (3-5) are connected with the near end of the outer catheter (3), and the far ends of the adjusting guide wires are connected with the guide wire adjusting knob (3-4);

the power assembly comprises a transmission conduit (3-2) and a motor (3-6), the transmission conduit (3-2) is rotatably arranged in the outer conduit (3), the motor (3-6) is of a hollow shaft structure and is arranged on the outer conduit (3), the output end of the motor (3-6) is connected with the far end of the transmission conduit (3-2), the near end of the transmission conduit (3-2) is connected with the cutting cutter head (3-1), and the motor (3-6) is further connected with a motor switch (3-7) and a motor power line (3-8).

6. The mechanical thrombectomy device according to claim 5, wherein the delivery catheter (2) is movably inserted through the central hole of the cutting cutter head (3-1) and the transmission catheter (3-2) in sequence, and the penetrating part is connected with the operation handle (2-3), and the delivery catheter (2), the transmission catheter (3-2) and the motor (3-6) are coaxial.

7. The mechanical thrombectomy device according to claim 1, wherein the aspiration assembly comprises an aspiration pump (3-9) and an aspiration tube, one end of the aspiration tube is communicated with the outer catheter (3) and the other end is communicated with the aspiration pump (3-9), and a thrombus recovery bag (3-10) is further arranged on the aspiration pump (3-9) for recovering thrombus aspirated by the aspiration pump (3-9).

8. The mechanical thrombectomy device according to claim 1, wherein a central hole (3-1-1) is formed in the center of the cutting cutter disc (3-1), the conveying conduit (2) penetrates through the central hole (3-1-1) and penetrates out of the central hole to be movably arranged in the outer conduit (3), mounting grooves (3-1-2) are formed in the cutting cutter disc (3-1) and the outer wall of the central hole (3-1-1), and the mounting grooves (3-1-2) are connected with the transmission conduit (3-2).

9. The mechanical thrombectomy device according to claim 8, wherein the periphery of the central hole (3-1-1), the cutting cutter head (3-1) and the annular array are provided with a plurality of cutting edges a (3-1-3), a plurality of channels a (3-1-4) and a plurality of channels B (3-1-5), two adjacent sides of each cutting edge a (3-1-3) are respectively provided with one channel a (3-1-4) and one channel B (3-1-5), one channel B (3-1-5) is composed of two symmetrically arranged small fan-shaped channels, and a plurality of cutting edges B (3-1-6) are uniformly distributed between the two small fan-shaped channels and on the cutting cutter head (3-1).

10. A method of using the mechanical thrombectomy device of claim 1, comprising the steps of:

s1, slowly penetrating the conveying catheter (2) and the outer catheter (3) into a blood vessel with thrombus, pushing the conveying catheter (2) to move axially in the blood vessel to be close to the thrombus after the conveying catheter and the outer catheter reach the vicinity of the thrombus, then continuously pushing the conveying catheter (2) to penetrate through the thrombus, and enabling the penetrated part to be far away from the thrombus;

s2, pushing the basket (1-1) in the conveying catheter (2) in a compressed state by pushing the push-pull guide wire (1-2), wherein the basket can be in an open state in a blood vessel to play a role in intercepting fine thrombus, opening the ultrasonic generator (4), and transmitting ultrasonic waves to the part of the thrombus through the conveying catheter (2) so as to achieve the purpose of assisting thrombus crushing;

s3, the power assembly provides a power source to enable the movable cutting cutter head (3-1) to rotate, the outer catheter (3) is pushed to slowly move forwards along the conveying catheter (2) to be gradually close to thrombus and cut thrombus blocks, the suction assembly is started, and the suction assembly enables the outer catheter (3) to form negative pressure suction cut thrombus;

s4, after the thrombus is broken, pulling the push-pull guide wire (1-2) to enable the basket (1-1) to return to the conveying catheter (2) again to be in a compressed state, taking the fine thrombus in the basket (1-1) out of the blood vessel, closing the suction assembly, slowly withdrawing the whole thrombus removal device out of the blood vessel, and completing the thrombus removal operation.