CN219782674U - Intravascular thrombus and foreign matter removing tool - Google Patents

Abstract

The application relates to an intravascular thrombus and foreign matter removing tool, which comprises a foreign matter removing assembly and a conveying part. The distal end of the conveying part is connected with the foreign matter removing component. The foreign matter removing assembly comprises a movable part, a first guide wire and a fixed ring, and the movable part is driven to axially move or circumferentially rotate along the first guide wire by controlling the first guide wire to axially move or circumferentially rotate relative to the conveying part, so that the shape and the outer diameter of the movable part are changed, and thrombus is cut and crushed. The movable part is a full-developing device, the X-ray detection system receives through the image imaging unit and converts invisible X-rays into digital signals, the digital signals are displayed on the display screen after being processed by the image processing system, and a doctor can observe the position and the state of the cleaning tool in real time through the display screen. The movable part of the application can be changed into a plurality of movable part units in the rotating process, so that the thrombus breaking efficiency is improved, the possibility of thrombus escaping is reduced, and the thrombus taking success rate is improved.

Description

Intravascular thrombus and foreign matter removing tool

Technical Field

The application relates to the technical field of medical appliances, in particular to an intravascular thrombus and foreign body removal tool.

Background

The stroke is divided into ischemic stroke and hemorrhagic stroke, and in patients suffering from ischemic stroke, intracranial large vessel occlusion caused by various reasons has been a treatment difficulty, and the current treatment methods comprise intravenous drug thrombolysis, arterial drug thrombolysis, intravascular mechanical thrombolysis, combination of a plurality of methods and the like. Arterial and venous thrombolysis is a conventional method for treating acute ischemic stroke, but the method has high requirements on treatment time window, has various restrictions on medicines, and has low vascular recanalization rate for acute ischemic stroke caused by large vessel occlusion.

Mechanical thrombolysis devices have gained widespread attention because of the following advantages: rapid recanalization, lower bleeding rates and prolonged time window in stroke. Has satisfactory clinical effect on acute ischemic stroke vascular recanalization caused by large vessel occlusion.

However, the current mechanical thrombus removing device still faces a plurality of problems in the thrombus removing process: the flexibility of the thrombus taking device is relatively poor, the outer diameter of the thrombus taking device is fixed, the outer diameter of the thrombus taking device cannot be changed adaptively according to the condition of a patient, thrombus can be cut along the fixed outer diameter only in the thrombus taking process, and thrombus with smaller outer diameter cannot be cut further; the thrombus taking device has fewer developing points, and can not judge the release and expansion conditions of the stent in the operation process, thereby being not beneficial to the operation of doctors in the operation process; in order to fully wrap thrombus, the thrombus can be moved out of the body along with the thrombus taking device, and the thrombus taking device has more structures, so that the blood vessel is easy to damage in the thrombus taking process, and other complications are brought.

In addition, with the wide application of minimally invasive interventional diagnosis and treatment technology, intravascular foreign body residues are caused by improper operation and quality problems of interventional products, and become a serious complication in interventional diagnosis and treatment. Foreign matter residues can lead to cardiovascular mechanical injury, perforation, thrombosis, and serious cases can directly lead to death of patients. Thus, there is a need for a device that can remove foreign matter from within a blood vessel.

Disclosure of Invention

The utility model aims to provide an intravascular thrombus and foreign matter removing tool which can optimize the structure of a thrombus removing device in the prior art, improve the thrombus removing effect and remove the foreign matters in the blood vessel.

The embodiment of the utility model can be realized by the following technical scheme:

an intravascular thrombus and foreign body removal tool is slidably disposed within a microcatheter.

The cleaning tool comprises a foreign matter cleaning assembly and a conveying part, wherein the distal end and the proximal end of the conveying part are respectively connected with the foreign matter cleaning assembly;

the foreign matter removal assembly comprises a movable part, a first guide wire and a fixed ring, wherein the distal end of the movable part is closed, and the proximal end of the movable part is fixedly connected with the conveying part;

the fixed ring is sleeved on the movable part and the first guide wire, is fixedly connected with the movable part and is movably connected with the first guide wire;

The distal end of the first guide wire is fixedly connected with the distal end of the movable part, the proximal end passes through the conveying part and extends out of the conveying part, the first guide wire is movably connected with the conveying part, and the first guide wire can axially move or circumferentially rotate relative to the conveying part to drive the movable part to axially move or circumferentially rotate.

Preferably, the cleaning tool further comprises a control assembly, and the distal end of the control assembly is fixedly connected with the proximal end of the conveying part.

Preferably, the control assembly comprises a proximal driving part and a distal connecting part, and the driving part is movably connected with the connecting part;

the distal end of the connecting part is fixedly connected with the proximal end of the conveying part, and the driving part is fixedly connected with the first guide wire;

the driving part and the connecting part are axially displaced relatively, so that the movable part is deformed into a three-dimensional 8-shaped structure;

the driving part and the connecting part rotate relatively to the circumferential direction, so that the movable part rotates along the circumferential direction of the first guide wire.

Further, the movable part is composed of a plurality of flexible wires, and the number of the flexible wires is more than or equal to two.

Preferably, the foreign matter removal assembly further includes a guide rod fixedly connected to the movable portion, the distal end of the first guide wire, and extending in the axial direction of the first guide wire.

Preferably, the foreign matter removal assembly further includes an outer bracket, which is a bracket structure capable of being contracted and expanded;

the outer support far end with guide bar swing joint, the outer support near end with conveying part fixed connection.

Further, the outer bracket is composed of a plurality of bracket rods, and the distal end density of the bracket rods is larger than the proximal end density.

Further, the foreign matter removal assembly further comprises a second fixing ring, and the bracket rod is movably connected with the guide rod through the second fixing ring;

the second fixed ring is sleeved on the guide rod and is movably connected with the guide rod, and the distance between the inner diameter of the second fixed ring and the outer diameter of the guide rod is 0-0.05mm;

the second fixed ring is positioned at the far end of the closed end of the movable part and does not exceed the far end of the guide rod.

Preferably, the material of the outer surface of the movable part is platinum.

Further, the conveying part is of a tubular structure, and the first guide wire penetrates through the conveying part.

The intravascular thrombus and foreign matter removal tool provided by the application has at least the following beneficial effects:

(1) The clearing tool provided by the application can be used for taking a thrombus and grabbing foreign matters in a blood vessel;

(2) According to the clearing tool provided by the application, the movable part can be changed into a plurality of movable part units in the rotating process, so that thrombus with smaller outer diameter can be further cut, the thrombus breaking efficiency can be improved, and the possibility of thrombus escape can be reduced;

(3) The outer diameter of the movable part of the cleaning tool provided by the application can be adjusted according to different conditions of patients, and the cleaning tool has the advantage of strong universality;

(4) The cleaning tool provided by the application has the advantages that the structure is simple, the stent rods are fewer, the damage to blood vessels is fewer, and the generation of complications is reduced;

(5) The cleaning tool provided by the application has the advantages that the movable part is fully developed, so that doctors can judge the relative position of the movable part and the release and expansion conditions of the movable part, and the success rate of removing the thrombus of the movable part is improved.

Drawings

FIG. 1 is a diagram showing the overall structure of a first embodiment of the present application when a movable part rotates;

FIG. 2 is a diagram showing a second overall structure of the first embodiment of the present application when the movable portion rotates;

FIG. 3 is an overall block diagram of a foreign material removal assembly according to the present application;

FIG. 4 is a diagram showing the whole structure of the movable part in the contracted state according to the second embodiment of the present application;

FIG. 5 is a diagram showing the whole structure of the second embodiment of the present application when the movable part is in an expanded state;

FIG. 6 is a cross-sectional view of the connection portion and the driving portion of the present application;

FIG. 7 is a diagram showing the whole structure of the connection of the driving part with scales and the connecting part;

FIG. 8 is an overall construction view of the first clamping device and the second clamping device of the present application;

FIG. 9 is a diagram showing the whole structure of the movable part and the outer bracket in the contracted state according to the third embodiment of the present application;

fig. 10 is an overall construction diagram of the third embodiment of the present application in which the movable portion and the outer frame are in an expanded state.

Reference numerals in the figures

1. The foreign matter removal unit, 11, movable part, 111, movable part unit, 112, flexible wire, 12, first fixed ring, 13, first guide wire, 131, second steel pipe, 132, first steel pipe, 15, guide bar, 16, outer bracket, 161, bracket bar, 17, second fixed ring, 2, conveying part, 3, control unit, 31, driving part, 311, third connecting part 3111, first connecting part, 31111, circular ring, 31112, rubber pad, 3112, second connecting part, 312, driving handle, 32, connecting part, 321, driving part connecting part, 322, catheter connecting part, 33, first clamping device, 34, second clamping device.

Detailed Description

The present application will be further described below based on preferred embodiments with reference to the accompanying drawings.

In addition, various components on the drawings have been enlarged (thick) or reduced (thin) for ease of understanding, but this is not intended to limit the scope of the application.

The singular forms also include the plural and vice versa.

In the description of the embodiments of the present application, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the embodiments of the present application conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, in the description of the present application, terms first, second, etc. are used herein for distinguishing between different elements, but not limited to the order of manufacture, and should not be construed as indicating or implying any relative importance, as such may be different in terms of its detailed description and claims.

The terminology used in the description presented herein is for the purpose of describing embodiments of the application and is not intended to be limiting of the application. It should also be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be connected mechanically, directly or indirectly through an intermediate medium, and can be communicated internally. The specific meaning of the above terms in the present application will be specifically understood by those skilled in the art.

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the application more clear, the technical scheme of the application is further described below by a specific embodiment in combination with the attached drawings. For convenience of description, the following description uses the terms "proximal" and "distal," where "proximal" refers to the end proximal to the operator and "distal" refers to the end distal to the operator and deeper into the vessel.

Example 1

Fig. 1 and 2 show the overall structure of the first embodiment of the present application, and as shown in fig. 1 and 2, the present application provides a tool for removing thrombus and foreign matters in a blood vessel, which can be used for rapidly removing thrombus from the blood vessel and grasping foreign matters in the blood vessel. The cleaning tool of the present embodiment includes a foreign matter cleaning assembly 1 and a conveying portion 2, wherein the foreign matter cleaning assembly 1 is used for grabbing or rapidly cleaning thrombus and foreign matter; the distal end of the conveying part 2 is connected with the foreign matter removal assembly 1; the doctor can control the foreign body removing assembly 1 to change the form so as to realize the grabbing/removing functions of thrombus or foreign bodies.

Specifically, the foreign body removal assembly 1 comprises a movable part 11, a first guide wire 13 and a fixed ring, wherein the movable part 11 can break up and collect thrombus in a shape-changing manner, and is beneficial to breaking up refractory, larger and harder thrombus with different sizes so as to facilitate taking out; the first guide wire 13 is used for driving the movable part 11 to axially move or circumferentially rotate; the fixed ring is used to assist the movable part 11 in transforming into various shapes.

Specifically, the movable portion 11 is composed of a plurality of flexible wires 112, and preferably, the number of flexible wires 112 is 2 or more, and in this embodiment, the case where the number of flexible wires 112 is two is described. The distal end of the flexible wire 112 is fixedly connected with the distal end of the first guide wire 13, and after the middle of the flexible wire 112 passes through the fixing ring (is fixedly connected with the fixing ring), the proximal end of the flexible wire 112 is fixedly connected with the distal end of the delivery part 2. In this way, any one flexible wire 112 forms an S-shape when in an expanded state, and two flexible wires 112 form a three-dimensional full 8-shape when in an expanded state, so that a larger and harder thrombus can be destroyed.

The expansion performance of the movable portion 11 may be self-expansion performance made of a memory material, or may be non-self-expansion performance in which contraction and expansion of the movable portion 11 are controlled by pulling the movable portion 11 by human traction. In this embodiment, by pulling the movable portion 11 by artificial traction, the movable portion 11 is controlled to be released to different degrees of inflation states at the distal end of the occluded thrombus of the blood vessel or at the occluded thrombus, and the movable portion 11 is driven to rotate circumferentially along the first guidewire 13 in the inflation state.

The fixing ring is sleeved on the flexible wire 112 and the first guide wire 13. Specifically, the fixed ring is fixedly connected with the flexible wire 112, the fixed ring is movably connected with the first guide wire 13, and the inner diameter of the fixed ring is slightly larger than the outer diameter of the first guide wire 13, so that the flexible wire 112 can move axially and simultaneously limit and fix the flexible wire 112, the movable part 11 is prevented from being in a lantern shape with two narrow middle drums, and the effect of removing thrombus by flexibly changing the shape cannot be realized.

The fixing ring and the flexible wire 112 may be fixedly connected by gluing, welding, or the like, and a person skilled in the art may select a suitable manner to realize the fixing connection between the fixing ring and the flexible wire 112 according to needs, which is not limited herein.

Fig. 3 shows an overall construction of the foreign matter removal assembly 1 of the present application, preferably, as shown in fig. 3, the fixing ring includes a first fixing ring 12, and the first fixing ring 12 is located at an intermediate point between the distal end and the proximal end of the movable portion 11. Specifically, let the connection point between the flexible wire 112 and the distal end of the first guide wire 13 be a, the connection point between the flexible wire 112 and the distal end of the delivery portion 2 be B, and the first fixing ring 12 be located at the middle point of the AB line segment.

The person skilled in the art may also arrange a plurality of first fixing rings 12 as needed, and the position where the first fixing rings 12 are connected to the movable portion 11 is not further limited herein.

Further, the delivery part 2 has a tubular structure, the distal end of the delivery part 2 is fixedly connected with the proximal end of the movable part 11, and the proximal end of the first guide wire 13 extends out of the delivery part 2 through the delivery part 2.

It is envisioned that the proximal end of the movable portion 11 may be fixedly attached to either the outer surface of the delivery portion 2 or the inner surface of the delivery portion 2. In this embodiment, the movable portion 11 is fixedly connected to the outer surface of the conveying portion 2, so that sufficient space can be provided for the first guide wire 13 to penetrate into the conveying portion 2, the proximal end of the movable portion 11 is prevented from winding with the first guide wire 13, processing is convenient, and processing cost is saved.

Further, the first guide wire 13 is movably connected with the conveying part 2, the first guide wire 13 is penetrated in the conveying part 2, and the first guide wire 13 can axially move or circumferentially rotate relative to the conveying part 2, so as to drive the movable part 11 to axially move or circumferentially rotate.

Further, the first guide wire 13 is manually driven to axially move relative to the delivery portion 2, so that the distal end of the movable portion 11 axially moves in synchronization with the first guide wire 13, and the movable portion 11 is released to an expanded state or contracted to a contracted state.

Specifically, when the first guide wire 13 is driven to axially retreat by people, the distal end of the movable part 11 is pulled by the distal end of the first guide wire 13 to axially move synchronously, and the proximal end of the movable part 11 is fixedly connected with the conveying part 2, so that the distance between the distal end and the proximal end of the movable part 11 is shortened while the distal end of the movable part 11 axially moves, the outer diameter of the movable part 11 is increased, and the movable part 11 is changed into an expansion state; when the first guide wire 13 is driven to axially advance manually, the distal end of the first guide wire 13 pulls the distal end of the movable part 11 to axially move synchronously, and as the proximal end of the movable part 11 is fixedly connected with the conveying part 2, the distance between the distal end and the proximal end of the movable part 11 is increased while the distal end of the movable part 11 axially moves, so that the outer diameter of the movable part 11 is reduced, and the movable part 11 is converted from an expanded state to a contracted state until the movable part 11 reaches a state almost overlapped with the first guide wire 13.

Further, the movable portion 11 can also be rotated circumferentially with respect to the conveying portion 2, and further cut and collect thrombus by rotating circumferentially. Specifically, fig. 1 shows an overall structure diagram of the movable portion 11 in the present application when rotating, as shown in fig. 1, since the distal end and the proximal end of the movable portion 11 are fixedly connected with the first guide wire 13 and the conveying portion 2, respectively, when the first guide wire 13 is manually controlled to rotate circumferentially, the distal end of the first guide wire 13 drives the flexible wire 112 to rotate distally and transmit the rotation trend to the proximal end, and since the first fixed ring 12 is fixedly connected with the flexible wire 112, the movable portions 11 on both sides of the first fixed ring 12 are transformed into a plurality of regular or irregular movable portion units 111 with smaller outer diameters in the rotation process, the outer diameters of the movable portion units 111 are smaller than the expansion outer diameters of the movable portion 11 when not rotating circumferentially, so that the thrombus with smaller volume can be further crushed, and the movable portion units 111 with smaller outer diameters can clamp the thrombus, thereby not only improving the efficiency of thrombus crushing, but also reducing the possibility of thrombus escaping.

At the same time, the movable portion unit 111 having a smaller outer diameter is also suitable for clamping and removing other foreign substances in the blood vessel. When the movable part 11 rotates along the circumferential direction of the first guide wire 13, the radial distance between the movable part unit 111 and the first guide wire 13 is further reduced, and the intravascular foreign bodies can be clamped by the movable part unit 111, so that clamping and taking out of the intravascular foreign bodies are realized.

Further, when the clearing tool passes through the thrombus in the blood vessel, the foreign matter clearing assembly 1 is manually controlled, so that the foreign matter clearing assembly 1 is released at the distal end of the thrombus or the thrombus, and the movable part 11 is controlled to be in a required shape and move proximally according to the specific situation, so that the movable part 11 is in contact with the thrombus and the thrombus is crushed or taken out.

Preferably, to enhance the guiding and advancing ability of the cleaning tool, the foreign matter removal assembly 1 further includes a guide rod 15, and the guide rod 15 is fixedly connected to the movable portion 11, the distal end of the first guide wire 13, and extends in the axial direction of the first guide wire 13.

Preferably, the distal end of the guide rod 15 is pointed to further enhance the guiding and advancing capabilities of the removal tool.

Preferably, for the real-time observation operation process and thrombus condition, the movable part 11 and the guide rod 15 are full developing devices, so that doctors can judge the positions of the clearing tool and thrombus in the thrombus removal operation process, and can judge the expansion condition of the movable part 11 after the movable part 11 is released, and can also observe whether thrombus is caught and falls off in the thrombus withdrawal process in real time during thrombus removal so as to guide specific thrombus removal microscopic operation, so that thrombus removal is more accurate, and the success rate of thrombus removal is improved.

Further, the guiding rod 15 is convenient for observing the actual position of the most distal end of the clearing tool reaching the blood vessel, and the movable part 11 can clearly judge the contact condition of the clearing tool and the thrombus of the blood vessel.

Specifically, the material of the outer surface of the movable portion 11 is platinum, and as shown in fig. 3, the movable portion 11 between the point a and the point B is the outer surface of the platinum material, so as to achieve the full development effect of the movable portion 11.

Preferably, the movable portion 11 and the guide rod 15 are made of the same material, specifically, an elastic wire made of platinum is arranged on the outer surface, and a nickel-titanium wire is arranged inside the elastic wire.

Further, the elastic thread is fixedly connected with the nickel-titanium wire, and can be fixed on the nickel-titanium wire in a laser welding mode, a soldering mode, a Jin Han mode, a silver welding mode, a dispensing mode, a riveting mode or a winding mode and the like.

Platinum is the highest atomic number among all medical materials because of its radiopacity. Based on this, in addition to its high density, means that the platinum can be clearly seen in X-ray imaging, since the high density of platinum makes it very effective for absorbing X-rays, rather than letting X-rays penetrate it, the movable part 11 and the guide bar 15 become completely visible devices when irradiated with X-rays, i.e. full-imaging devices.

Specifically, in the present application, the development is realized by an X-ray detection system mainly comprising: the system comprises a ray source, an image imaging unit, a computer image processing system, a mechanical system, an electrical control system, a safety protection system and a warning system, wherein the ray source is a device for generating rays, when the X-rays penetrate through a tested product, the X-rays are received by the image imaging unit on the other side of the product, the image imaging unit converts invisible X-rays into digital signals, and after the digital signals are processed by the computer image processing system, the digital images are displayed on a display screen, so that the information of the defect properties, the sizes, the positions and the like inside the tested product can be visually seen.

In the application, after the ray source penetrates through the blood vessel with the clearing tool, the transmission capacity of different structures for X rays is different, the guide rod 15 and the movable part 11 can effectively absorb the X rays, and after the X rays are received by the image imaging unit and processed by the computer image processing system, the clear movable part 11 and the guide rod 15 can be seen on the display screen.

Preferably, to increase the service life of the first guide wire 13, the first guide wire 13 is made of stainless steel.

Preferably, in order to further improve the developing effect of the foreign matter removal assembly 1, the first guide wire 13 is made of platinum, so that the first guide wire 13 can also achieve the developing effect.

In a first embodiment, the cleaning tool is used as follows: before the thrombus taking operation, the cleaning tool is firstly received in the microcatheter in advance, the front end of the cleaning tool (namely the guide rod 15) is positioned outside the microcatheter, and a doctor can observe the state and the position of the cleaning tool in real time through the display screen; the microcatheter is led to pass through thrombus, then the microcatheter is led to the distal end of the thrombus along the microcatheter, then the microcatheter is withdrawn, and then the microcatheter is retracted, so that the clearing tool is exposed, and the foreign matter clearing component 1 is positioned at the distal end of the thrombus or the thrombus; one hand of the doctor keeps the delivery part 2 still, the other hand pulls the part of the first guide wire 13 extending out of the delivery part 2, and when the first guide wire 13 is pulled away from the delivery part 2 along the axial direction, the movable part 11 is released to a proper expansion state at the distal end of thrombus or thrombus; the artificial traction cleaning tool moves so that the movable part 11 is fully contacted with thrombus; when the first guide wire 13 is pulled to rotate circumferentially, the movable part 11 rotates along the circumferential direction of the first guide wire 13 in an expanded state, so that cutting and crushing of thrombus are realized, and the crushed thrombus is attached to the movable part 11; manually pulling the first guide wire 13 to approach the conveying part 2 along the axial direction until the movable part 11 reaches a state of being almost overlapped with the first guide wire 13, thereby realizing the clamping of thrombus or foreign matters; according to the actual condition of thrombus or foreign matter in the blood vessel, the position of the movable part 11 and/or the expansion size of the movable part 11 and/or the change of the number of the movable part units 111 are continuously adjusted until the cleaning tool is moved out of the body, and finally the thrombus or the foreign matter is taken out.

It is conceivable that one hand of the physician may hold the first guide wire 13 stationary and the other hand pulls the delivery part 2 for circumferential or axial movement, thereby effecting axial or circumferential rotation of the movable part 11. Specifically, as shown in fig. 2, when the delivery portion 2 rotates circumferentially, the movable portion 11 transmits a rotation tendency from the proximal end to the distal end.

Example two

Fig. 4 and 5 are respectively overall structural views of the movable portion of the second embodiment of the present application in a contracted state and an expanded state, and as shown in fig. 4 and 5, the difference between the present embodiment and the first embodiment is that the cleaning tool further includes a control unit 3, and the distal end and the proximal end of the conveying portion 2 are respectively connected to the foreign matter cleaning unit 1 and the control unit 3; the control component 3 is used for controlling the foreign body removal component 1 to change the form so as to realize the grabbing/removing functions of thrombus or foreign bodies.

Specifically, in the present embodiment, the movable portion 11 is controlled by the control unit 3 to be released to the expanded state to different degrees at the distal end of the blocked thrombus of the thrombus or at the blocked thrombus, and the movable portion 11 is driven to rotate circumferentially along the first guidewire 13 in the expanded state.

Further, the conveying part 2 is in a tubular structure, the distal end of the conveying part 2 is fixedly connected with the proximal end of the movable part 11, and the proximal end is fixedly connected with the control assembly 3.

Further, the proximal end of the first guide wire 13 is fixedly connected with the control assembly 3 through the conveying part 2, the first guide wire 13 is arranged in the conveying part 2 in a penetrating manner, the control assembly 3 can drive the first guide wire 13 to axially move relative to the conveying part 2, so that the distal end of the movable part 11 and the first guide wire 13 synchronously axially move, and the movable part 11 is released to an expanded state or contracted to a contracted state.

Specifically, when the control component 3 drives the first guide wire 13 to axially retreat, the distal end of the first guide wire 13 pulls the distal end of the movable part 11 to synchronously axially move, and when the distal end of the movable part 11 axially moves, the distance between the distal end and the proximal end of the movable part 11 is shortened due to the fixed connection of the proximal end of the movable part 11 and the conveying part 2, so that the outer diameter of the movable part 11 is increased, and the movable part 11 is changed into an expansion state; when the control assembly 3 drives the first guide wire 13 to axially advance, the distal end of the first guide wire 13 pulls the distal end of the movable part 11 to axially move synchronously, and as the proximal end of the movable part 11 is fixedly connected with the conveying part 2, the distance between the distal end and the proximal end of the movable part 11 is increased while the distal end of the movable part 11 axially moves, so that the outer diameter of the movable part 11 is reduced, and the movable part 11 is converted from an expanded state to a contracted state until the movable part 11 reaches a state almost overlapped with the first guide wire 13.

Further, the movable portion 11 is also capable of rotating circumferentially along the first guide wire 13, thereby cutting and collecting thrombus. Specifically, because the distal end and the proximal end of the movable portion 11 are fixedly connected with the first guide wire 13 and the conveying portion 2 respectively, when the control assembly 3 rotates along the circumferential direction of the first guide wire 13, the distal end of the first guide wire 13 drives the distal end of the flexible wire 112 to rotate and transmit the rotation trend to the proximal end, and because the first fixed ring 12 is fixedly connected with the flexible wire 112, the movable portions 11 on two sides of the first fixed ring 12 can be converted into a plurality of regular or irregular movable portion units 111 with smaller outer diameters in the rotation process, the outer diameters of the movable portion units 111 are smaller than the expansion outer diameters of the movable portion 11 when not rotating circumferentially, the thrombus with smaller volume can be further crushed, and the movable portion units 111 with smaller outer diameters can clamp the thrombus, so that the efficiency of thrombus crushing is improved, and the possibility of thrombus escape is reduced.

At the same time, the movable portion unit 111 having a smaller outer diameter is also suitable for clamping and removing other foreign substances in the blood vessel. When the movable part 11 rotates along the circumferential direction of the first guide wire 13, the radial distance between the movable part unit 111 and the first guide wire 13 is further reduced, and the intravascular foreign bodies can be clamped by the movable part unit 111, so that clamping and taking out of the intravascular foreign bodies are realized.

Further, when the clearing tool passes through the thrombus in the blood vessel, the foreign matter clearing assembly 1 is controlled by the control assembly 3, so that the foreign matter clearing assembly 1 is released at the distal end of the thrombus or the thrombus, and the movable part 11 is controlled to be in a required shape and move proximally according to the specific situation, so that the movable part 11 is contacted with the thrombus and the thrombus is crushed or taken out.

Preferably, the control assembly 3 includes a driving portion 31 near the proximal end and a connecting portion 32 near the distal end, fig. 6 is a cross-sectional view showing the connection between the driving portion 31 and the connecting portion 32 in the present application, as shown in fig. 6, the driving portion 31 and the connecting portion 32 are movably connected, the connecting portion 32 is fixedly connected to the delivery portion 2, and the driving portion 31 is used for realizing circumferential rotation and axial movement of the first guide wire 13, so as to control the morphological change and the rotation state of the movable portion 11.

It is conceivable that the driving portion 31 and the connecting portion 32 may be movably connected by means of a snap connection, a screw connection or the like, and in this embodiment, the driving portion 31 and the connecting portion 32 are movably connected by means of a snap connection.

Specifically, as shown in fig. 4 and 5, the first guide wire 13 sequentially passes through the first fixing ring 12, the conveying portion 2, the connecting portion 32 and the driving portion 31 from the distal end of the flexible wire 112, the distal end thereof is fixedly connected with the distal end of the flexible wire 112, the proximal end thereof is fixedly connected with the driving portion 31, and when the driving portion 31 axially moves or circumferentially rotates relative to the connecting portion 32, the first guide wire 13 can axially move or circumferentially rotate synchronously with the driving portion 31.

Specifically, a channel through which the first guide wire 13 passes is provided in the control assembly 3, and the channel penetrates the connecting portion 32 and the driving portion 31 along the axial direction of the first guide wire 13, and the first guide wire 13 moves axially or rotates circumferentially in the channel.

Specifically, as shown in fig. 6, the connection portion 32 includes a proximal driving portion connection portion 321 and a distal catheter connection portion 322, and the driving portion connection portion 321 and the distal catheter connection portion 322 are fixedly connected. The driving part connecting part 321 is used for realizing the movable connection between the driving part 31 and the connecting part 32, and the conduit connecting part 322 is used for realizing the fixed connection between the connecting part 32 and the conveying part 2.

It is conceivable that the driving part connecting part 321 and the catheter connecting part 322 may be fixedly connected by means of gluing, welding, screw connection, clamping connection, etc., and in this embodiment, the driving part connecting part 321 and the distal catheter connecting part 322 are fixedly connected by means of screw connection.

Specifically, the driving part 31 includes a distal third connection part 311 and a proximal driving handle 312, and the third connection part 311 and the driving handle 312 are fixedly connected. The third connecting portion 311 is used for movably connecting the driving portion 31 and the connecting portion 32, and the driving handle 312 is used for realizing rotation operation and axial movement operation by a doctor.

It is conceivable that the third connection portion 311 and the driving handle 312 may be fixedly connected by means of gluing, welding, screw connection, clamping, integral molding, or the like. In the present embodiment, the third connection portion 311 and the driving handle 312 are fixedly connected by screw connection.

Further, the third connecting portion 311 includes a first connecting portion 3111 at a distal end and a second connecting portion 3112 at a proximal end, the first connecting portion 3111 is convexly disposed on a side of the second connecting portion 3112 facing the connecting portion 32, the first connecting portion 3111 is movably connected to the driving portion connecting portion 321, and the second connecting portion 3112 is fixedly connected to the driving handle 312. Further, the first connection portion 3111 and the second connection portion 3112 have a stepped smooth transition, and an outer diameter of the first connection portion 3111 is smaller than an outer diameter of the second connection portion 3112.

Specifically, the first connection portion 3111 and the second connection portion 3112 are fixedly connected, and it is conceivable that the first connection portion 3111 and the second connection portion 3112 may be fixedly connected by means of gluing, welding, screw connection, clamping connection, integral molding, or the like. In this embodiment, the first connection portion 3111 and the second connection portion 3112 are integrally formed.

Specifically, a through hole adapted to the first connection portion 3111 is formed on a side of the driving portion connection portion 321 facing the driving portion 31, the first connection portion 3111 may be accommodated in the driving portion connection portion 321, and the first connection portion 3111 may move axially or rotate circumferentially along the first guide wire 13 relative to the connection portion 32 in the driving portion connection portion 321.

Preferably, in order to realize that the first connection portion 3111 does not separate from the driving portion connection portion 321, such that the first connection portion 3111 always moves axially and rotates circumferentially in the through hole of the driving portion connection portion 321, a protruding portion is disposed at a proximal end of the driving portion connection 321, protruding on an inner wall of the through hole of the driving portion connection 321, and disposed radially along the through hole, and when the first connection portion 3111 moves axially to the protruding portion, the protruding portion abuts against a distal end of the first connection portion 3111, and further the first connection portion 3111 is limited to continue to move in an axial direction of the first guide wire 13, so that the first connection portion 3111 does not separate from the driving portion connection portion 321.

Further, the third connecting portion 311, the driving handle 312, the catheter connecting portion 322 and the driving portion connecting portion 321 are made of plastic, and when the first connecting portion 3111 rotates or moves circumferentially in the driving portion connecting portion 321, the first connecting portion 3111 contacts the driving portion connecting portion 321 due to the hard plastic material, which causes problems of noise and wear.

Preferably, in the present embodiment, the rubber pad 31112 is mounted to the distal end of the first connection portion 3111, and when the first connection portion 3111 moves axially or rotates circumferentially, the rubber pad 31112 moves axially or rotates circumferentially in the driving portion connection portion 321, thereby reducing noise and also reducing wear of the first connection portion 3111 and the driving portion connection portion 321.

Further, in order to prevent the rubber pad 31112 from falling off the first connection portion 3111, the ring 31111 is fixedly connected to the distal end of the first connection portion 3111, the ring 31111 is located at the distal end of the rubber pad 31112, the rubber pad 31112 abuts against the ring 31111, and the rubber pad 31112 can be prevented from being disconnected from the first connection portion 3111. Specifically, the drive handle 312 is fixedly connected to the first guide wire 13.

It is conceivable that the driving handle 312 may be fixedly connected to the first guide wire 13 by means of gluing, welding or the like, and in this embodiment, since the outer diameter of the first guide wire 13 is small, as shown in fig. 4, the control assembly 3 further comprises 2 clamping devices, namely, the first clamping device 33 and the second clamping device 34, and the driving handle 312 is fixedly connected to the first guide wire 13 by means of the first clamping device 33.

Specifically, fig. 8 shows an overall structure of the first clamping device 33 according to the present application, wherein the closed end of the first clamping device 33 is fixedly connected to the third connecting portion 311, the free end is screw-connected to the driving handle 312, the free end of the first clamping device 33 clamps the first guide wire 13 when the third connecting portion 311 is screw-tightened to the driving handle 312, and the free end of the first clamping device 33 releases the first guide wire 13 when the third connecting portion 311 is screw-unscrewed to the driving handle 312, as shown in fig. 8.

Preferably, in order to facilitate clamping the first guide wire 13, a first steel tube 132 is sleeved outside the first guide wire 13, the first steel tube 132 corresponds to the driving portion 31 in position, the first steel tube 132 is fixedly connected with the first guide wire 13, and the first clamping device 33 clamps the first steel tube 132 to achieve the fixed connection between the driving handle 312 and the first guide wire 13.

Specifically, the connection portion 32 is movably connected to the first guide wire 13, and when the driving portion 31 moves axially or rotates circumferentially along the first guide wire 13, the first guide wire 13 can move axially or rotate circumferentially relative to the connection portion 32.

Further, a second steel tube 131 is sleeved outside the first guide wire 13, the second steel tube 131 corresponds to the connecting portion 32 in position, the second steel tube 132 is movably connected with the first guide wire 13, and the second steel tube 132 provides a channel for the first guide wire 13 to move in the connecting portion 32.

Further, the second steel pipe 131 is fixedly connected to the connecting portion 32, and it is conceivable that the second steel pipe 131 may be fixedly connected to the connecting portion 32 by means of gluing, welding, or the like, and in this embodiment, the connecting portion 32 is fixedly connected to the second steel pipe 131 by means of the second clamping device 34.

Specifically, fig. 8 shows an overall structure of the second clamping device 34 in the present application, wherein the closed end of the second clamping device 34 is fixedly connected to the driving part connecting part 321, the free end is screw-connected to the pipe connecting part 322, the free end of the second clamping device 34 clamps the second steel pipe 131 when the driving part connecting part 321 is screw-tightened with the pipe connecting part 322, and the free end of the second clamping device 34 unclamps the second steel pipe 131 when the driving part connecting part 321 is screw-unscrewed with the pipe connecting part 322, as shown in fig. 8.

Preferably, the first clamping device 33 and the second clamping device 34 have the same structure and are made of copper, so that the clamping force can be improved.

Further, a portion of the first guide wire 13 is exposed between the first steel pipe 132 and the second steel pipe 131, and the portion of the first guide wire 13 is located between the first clamping device 33 and the second clamping device 34.

Specifically, when the driving portion 31 is away from the connecting portion 32 in the axial direction of the first guide wire 13, the first steel pipe 132 and the first guide wire 13 are axially away from the connecting portion 32 and the second steel pipe 131, so that the length of the first guide wire 13 exposed between the first steel pipe 132 and the second steel pipe 131 increases; when the driving part 31 approaches the connecting part 32 along the axial direction of the first guide wire 13, the first steel tube 132 and the first guide wire 13 axially approach the connecting part 32 and the second steel tube 131, so that the length of the exposed first guide wire 13 between the first steel tube 132 and the second steel tube 131 is reduced.

In this embodiment, the driving part 31 moves along the axial direction of the first guide wire 13 relative to the connecting part 32, so as to control the expansion outer diameter change of the movable part 11, and since the intravascular thrombus removal operation is an extremely precise operation process, a doctor is required to precisely control the expansion size of the movable part 11. In order to accurately grasp the influence of the moving distance of the driving part 31 on the expanded outer diameter of the movable part 11, it is preferable that graduations be provided on the moving paths of the driving part 31 and the connecting part 32 for the convenience of judgment of a doctor. Fig. 7 shows an overall structure of the connection of the driving part 31 and the connecting part 32 with scales in the present application, and as shown in fig. 7, the proximal end of the first connecting part 3111 is provided with different scales, and when the driving part 31 moves axially relative to the connecting part 32, the proximal end of the driving part connecting part 321 can be aligned with the different scales, thereby achieving accurate and specific control of the expanded outer diameter of the movable part 11.

In this embodiment, when the driving portion 31 is far away from the connecting portion 32 along the axial direction of the first guide wire 13, since the driving handle 312 is fixedly connected with the first guide wire 13 through the first clamping device 33 and the first steel tube 132, the first guide wire 13 moves axially in synchronization with the driving portion 31, the first guide wire 13 moves axially relative to the second steel tube 131 and the connecting portion 32, and the distal end of the first guide wire 13 pulls the flexible wire 112 to move synchronously distally, so that the movable portion 11 can realize the conversion between the expanded state and the contracted state, that is, the change of the expanded state and the size of the expanded outer diameter of the movable portion 11 can be realized by controlling the relative position of the driving portion 31 to the connecting portion 32. In this embodiment, when the driving portion 31 rotates along the circumferential direction of the first guide wire 13, the first guide wire 13 drives the flexible wire 112 and the driving portion 31 to rotate circumferentially synchronously, so that the movable portion 11 rotates along the circumferential direction of the first guide wire 13, and further the thrombus is cut and broken, that is, the driving portion 31 drives the first guide wire 13 to rotate circumferentially, so that the circumferential rotation of the movable portion 11 can be realized.

It is conceivable to change the positions of the driving part 31 and the connecting part 32 correspondingly, for example, the connecting part 32 is pushed towards the distal end, so as to realize the deformation of the movable part 11, which also belongs to the conventional deformation of the technology of the present application and falls into the protection scope of the present application.

In addition, a device having the same rotation function as the driving part 31 may be provided in the connection part 32, and when the connection part 32 is rotated, the conveying part 2 is driven to rotate, and then the proximal end of the movable part 11 is driven to rotate, and fig. 2 shows a second overall structure diagram of the present application when the movable part 11 rotates, and as shown in fig. 2, the movable part 11 transmits a rotation trend from the proximal direction to the distal direction.

In the second embodiment, the cleaning tool is used as follows: before the thrombus taking operation, the cleaning tool is firstly received in the microcatheter in advance, the front end of the cleaning tool (namely the guide rod 15) is positioned outside the microcatheter, and a doctor can observe the state and the position of the cleaning tool in real time through the display screen; the microcatheter is led to pass through thrombus, then the microcatheter is led to the distal end of the thrombus along the microcatheter, then the microcatheter is withdrawn, and then the microcatheter is retracted, so that the clearing tool is exposed, and the foreign matter clearing component 1 is positioned at the distal end of the thrombus or the thrombus; the driving part 31 is far away from the connecting part 32 along the axial direction of the first guide wire 13, so that the movable part 11 is released to a proper expansion state at the distal end of thrombus or thrombus; moving the control assembly 3 so that the movable part 11 is in full contact with the thrombus; the driving part 31 rotates along the circumferential direction of the first guide wire 13, so that the movable part 11 rotates along the circumferential direction of the first guide wire 13 in an expanded state, thereby realizing cutting and crushing of thrombus, and the crushed thrombus is attached to the movable part 11; the driving part 31 approaches the connecting part 32 along the axial direction of the first guide wire 13 until the movable part 11 reaches a state of being almost overlapped with the first guide wire 13, thereby realizing the clamping of thrombus or foreign matters; according to the actual condition of thrombus or foreign matter in the blood vessel, the position of the movable part 11 and/or the expansion size of the movable part 11 and/or the change of the number of the movable part units 111 are continuously adjusted until the cleaning tool is moved out of the body, and finally the thrombus or the foreign matter is taken out.

Example III

Fig. 9 and 10 show an overall structure and a perspective view of a third embodiment of the present application, and as shown in fig. 9 and 10, the third embodiment is different from the first embodiment in that the foreign matter removal assembly 1 further includes an outer bracket 16, and the outer bracket 16 is used for being attached to an inner wall of a blood vessel, so that thrombus is completely collected in the outer bracket 16, and the thrombus is wrapped in the outer bracket 16.

Specifically, the outer bracket 16 is a bracket mechanism capable of contracting and expanding, the outer bracket 16 is composed of a plurality of bracket rods 161, and the distal ends of the bracket rods 161 are movably connected with the guide rods 15.

Further, the proximal end of the stent rod 161 is fixedly connected to the delivery unit 2, and the stent rod 161 is released to an expanded state in the blood vessel during a thrombus removal operation.

It should be noted that, the expansion performance of the bracket bar 161 may be self-expansion performance made of a memory material, or may be non-self-expansion performance by manually pulling the bracket bar 161 to control the contraction and expansion thereof. In this embodiment, the expansion performance of the bracket bar 161 is a self-expansion performance made of a memory material.

Specifically, the foreign matter removal assembly 1 further includes a second fixing ring 17, the second fixing ring 17 is movably connected with the guide rod 15, and the bracket rod 161 is movably connected with the guide rod 15 through the second fixing ring 17.

Further, the second fixing ring 17 moves axially along the first guide wire 13 on the guide rod 15, and the second fixing ring 17 does not disengage from the distal end of the guide rod 15.

Preferably, in order to prevent the second fixing ring 17 from falling off from the guide bar 15, the distal end of the guide bar 15 is provided with a protrusion, which is protruded from the distal end of the guide bar 15 in the radial direction of the guide bar 15.

Specifically, the distal end of the support rod 161 is fixedly connected to the second fixing ring 17, the second fixing ring 17 is sleeved on the guide rod 15, and the portion of the support rod 161 near the proximal end is fixedly connected to the distal end of the delivery part 2. Thus, in the expanded state of the outer stent 16, thrombus can be completely collected between the stent rods 161, and the thrombus can be cut and crushed by the rotation of the movable portion 11.

Specifically, when the microcatheter is retracted, the foreign matter removal assembly 1 is released from the microcatheter, the outer stent 16 is released to an expanded state by the self-expanding property, and since the proximal end of the outer stent 16 is fixedly connected to the delivery section 2, the outer stent 16 expands in the axial direction of the first guide wire 13, and the second fixing ring 17 moves on the guide rod 15 in the axial direction of the first guide wire 13 until released to the expanded state.

Further, the inner diameter of the second fixing ring 17 is slightly larger than the outer diameter of the guide rod 15.

Preferably, the distance between the inner diameter of the second fixing ring 17 and the outer diameter of the guide rod 15 is 0-0.05mm.

Specifically, the second fixing ring 17 is not coincident with the distal end of the movable portion 11, and the second fixing ring 17 is located at the distal end of the closed end of the movable portion 11, so that a larger expansion space is provided for the movable portion 11.

Specifically, the stent rod 161 can wrap the flexible wire 112 from outside, so that the stability of clamping thrombus and foreign matters can be further improved, and the possibility of thrombus and foreign matters escaping is reduced. Preferably, to achieve complete encapsulation of the thrombus by the outer stent 16, the outer stent 16 has a greater distal density than proximal density, and proximal retraction through the outer stent 16 may be achieved so that the thrombus more readily enters the outer stent 16 through the proximal end of the outer stent 16, completely encapsulating the thrombus within the vessel.

Specifically, the proximal end of the support rod 161 is fixedly connected with the conveying part 2, the distal end is fixedly connected with the second fixing ring 17, and in the process that at least one support rod 161 extends from the conveying part 2 to the second fixing ring 17, at least 2 support rods 161 are expanded to be connected with the second fixing ring 17, so that the distal end density of the outer support 16 is higher than the proximal end density.

Preferably, the number of outer stents 16 is reduced, reducing trauma to the vessel's inner wall.

Further, when the outer stent 16 completely encloses the thrombus in the blood vessel, the movable portion 11 can be released to an expanded state in the outer stent 16, and the thrombus collected in the outer stent 16 can be cut and broken for easy removal.

It is conceivable that, due to the small number of outer stents 16, there may be situations where the expanded state in the vessel is not ideal, at which time the change in the outer diameter of the movable portion 11 within the outer stent 16 may be controlled by the control unit 3, and by adjusting the expanded state of the movable portion 11 to different degrees, the movable portion 11 gives a certain radial supporting force to the outer stent 16, so that the outer stent 16 is released to the ideal expanded state.

In the third embodiment, the cleaning tool is used as follows: before the thrombus taking operation, the cleaning tool is firstly received in the microcatheter in advance, the front end of the cleaning tool (namely the guide rod 15) is positioned outside the microcatheter, and a doctor can observe the state and the position of the cleaning tool in real time through the display screen; passing the microcatheter through the thrombus, then delivering the microcatheter to the distal end of the thrombus along the microcatheter, then withdrawing the microcatheter, and then withdrawing the microcatheter to expose the removal tool in the embodiment, wherein the foreign matter removal assembly 1 is positioned at the distal end of the thrombus or the thrombus; the outer stent 16 is released to an expansion state at the distal end of thrombus or thrombus according to the self-expansion performance, one hand of a doctor keeps the conveying part 2 still, the other hand pulls the part of the first guide wire 13 extending out of the conveying part 2, when the first guide wire 13 is pulled to be far away from the conveying part 2 along the axial direction, the movable part 11 is released to a proper expansion state in the outer stent 16, and when the self-expansion state of the outer stent is not ideal, the movable part 11 applies supporting force to the outer stent 16 outwards, so that the outer stent 16 is released more fully; moving the clearing tool so that the outer stent 16 completely encloses the thrombus and the movable portion 11 is in full contact with the thrombus; when the first guide wire 13 is pulled to rotate circumferentially, the movable part 11 rotates along the circumferential direction of the first guide wire 13 in an expanded state, so that the cutting and crushing of thrombus are realized, the crushed thrombus is attached to the movable part 11, the first guide wire 13 is manually pulled to approach the conveying part 2 along the axial direction until the movable part 11 reaches a state of being almost overlapped with the first guide wire 13, and the clamping of the thrombus or foreign matters is realized; according to the actual condition of thrombus or foreign matter in the blood vessel, the position of the movable part 11 and/or the expansion size of the movable part 11 and/or the change of the number of the movable part units 111 are continuously adjusted until the cleaning tool is moved out of the body, and finally the thrombus or the foreign matter is taken out.

Example IV

The fourth embodiment differs from the second embodiment in that the foreign matter removal assembly 1 further includes the outer bracket 16 in the third embodiment.

In the fourth embodiment, the cleaning tool is used as follows: before the thrombus taking operation, the cleaning tool is firstly received in the microcatheter in advance, the front end of the cleaning tool (namely the guide rod 15) is positioned outside the microcatheter, and a doctor can observe the state and the position of the cleaning tool in real time through the display screen; passing the microcatheter through the thrombus, then delivering the microcatheter to the distal end of the thrombus along the microcatheter, then withdrawing the microcatheter, and then withdrawing the microcatheter to expose the removal tool in the embodiment, wherein the foreign matter removal assembly 1 is positioned at the distal end of the thrombus or the thrombus; the outer stent 16 is released to an expansion state at the distal end of thrombus or at the thrombus according to the self-expansion performance, the connecting part 32 is far away from the driving part 31 along the axial direction of the first guide wire 13, so that the movable part 11 is released to a proper expansion state in the outer stent 16, and when the self-expansion state of the outer stent is not ideal, the movable part 11 applies supporting force to the outer stent 16 outwards, so that the outer stent 16 is released more fully; the control assembly 3 is moved so that the outer stent 16 completely encloses the thrombus and the movable portion 11 is in full contact with the thrombus; the driving part 31 rotates along the circumferential direction of the first guide wire 13, so that the movable part 11 rotates along the circumferential direction of the first guide wire 13 in an expanded state, further cutting and crushing of thrombus are realized, the crushed thrombus is attached to the movable part 11, the driving part 31 approaches the connecting part 32 along the axial direction of the first guide wire 13 until the movable part 11 reaches a state of being almost overlapped with the first guide wire 13, and thus, the clamping of thrombus or foreign matters is realized; according to the actual condition of thrombus or foreign matter in the blood vessel, the position of the movable part 11 and/or the expansion size of the movable part 11 and/or the change of the number of the movable part units 111 are continuously adjusted until the cleaning tool is moved out of the body, and finally the thrombus or the foreign matter is taken out.

While the foregoing is directed to embodiments of the present application, other and further embodiments of the application may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (10)

1. An intravascular thrombus and foreign matter removal tool, the removal tool is slidably arranged in a microcatheter, and is characterized in that:

the cleaning tool comprises a foreign matter cleaning assembly (1) and a conveying part (2), wherein the distal end of the conveying part (2) is connected with the foreign matter cleaning assembly (1);

the foreign matter removal assembly (1) comprises a movable part (11), a first guide wire (13) and a fixed ring, wherein the distal end of the movable part (11) is closed, and the proximal end is fixedly connected with the conveying part (2);

the fixed ring is sleeved on the movable part (11) and the first guide wire (13), is fixedly connected with the movable part (11) and is movably connected with the first guide wire (13);

the distal end of the first guide wire (13) is fixedly connected with the distal end of the movable part (11), the proximal end passes through the conveying part (2) and extends out of the conveying part (2), the first guide wire (13) is movably connected with the conveying part (2), and the first guide wire (13) can axially move or axially rotate relative to the conveying part (2) to drive the movable part (11) to axially move or circumferentially rotate.

2. An intravascular thrombus and foreign object removal tool as in claim 1 wherein:

the cleaning tool further comprises a control assembly (3), and the distal end of the control assembly (3) is fixedly connected with the proximal end of the conveying part (2).

3. An intravascular thrombus and foreign object removal tool as in claim 2 wherein:

the control assembly (3) comprises a driving part (31) at the near end and a connecting part (32) at the far end, and the driving part (31) is movably connected with the connecting part (32);

the distal end of the connecting part (32) is fixedly connected with the proximal end of the conveying part (2), and the driving part (31) is fixedly connected with the first guide wire (13);

the driving part (31) and the connecting part (32) are axially displaced relatively, so that the movable part (11) is deformed into a three-dimensional 8-shaped structure;

the driving part (31) and the connecting part (32) rotate relatively in the circumferential direction, so that the movable part (11) rotates along the circumferential direction of the first guide wire (13).

4. An intravascular thrombus and foreign object removal tool as in claim 1 wherein:

the movable part (11) is composed of a plurality of flexible wires (112), and the number of the flexible wires (112) is more than or equal to two.

5. An intravascular thrombus and foreign object removal tool as in claim 1 wherein:

The foreign matter removal assembly (1) further comprises a guide rod (15), wherein the guide rod (15) is fixedly connected to the movable part (11) and the distal end of the first guide wire (13) and extends along the axial direction of the first guide wire (13).

6. An intravascular thrombus and foreign object removal tool as in claim 5 wherein:

the foreign matter removal assembly (1) further comprises an outer support (16), and the outer support (16) is of a support structure capable of shrinking and expanding;

the far end of the outer support (16) is movably connected with the guide rod (15), and the near end of the outer support (16) is fixedly connected with the conveying part (2).

7. An intravascular thrombus and foreign object removal tool as in claim 6 wherein:

the outer stent (16) is composed of a plurality of stent rods (161), and the distal end density of the stent rods (161) is greater than the proximal end density.

8. An intravascular thrombus and foreign object removal tool as in claim 7 wherein:

the foreign matter removal assembly (1) further comprises a second fixed ring (17), and the bracket rod (161) is movably connected with the guide rod (15) through the second fixed ring (17);

the second fixing ring (17) is sleeved on the guide rod (15), the second fixing ring (17) is movably connected with the guide rod (15), and the distance between the inner diameter of the second fixing ring (17) and the outer diameter of the guide rod (15) is 0-0.05mm;

The second fixed ring (17) is positioned at the distal end of the closed end of the movable part (11) and does not exceed the distal end of the guide rod (15).

9. An intravascular thrombus and foreign object removal tool as in claim 1 wherein:

the material of the outer surface of the movable part (11) is platinum.

10. An intravascular thrombus and foreign object removal tool as in claim 1 wherein:

the conveying part (2) is of a tubular structure, and the first guide wire (13) penetrates through the conveying part (2).