CN117357208A - Intravascular thrombus aspiration device - Google Patents

Abstract

The invention discloses an intravascular thrombus suction device, and relates to the technical field of intravascular thrombus suction. The device comprises a pump, a liquid pipeline, a suction conduit and a waste liquid collecting piece; one end of the liquid pipeline is communicated with the pump, and the other end of the liquid pipeline is suitable for being communicated with the liquid supply device; the suction catheter is provided with a liquid inlet channel and a waste liquid channel, the liquid inlet channel is communicated with the pump, the distal end of the suction catheter is provided with a suction part, and the suction part is used for generating negative pressure in the distal end of the suction catheter by liquid under the driving of the pump so as to suck thrombus in a blood vessel into the suction catheter, and meanwhile, a distal end liquid spraying hole sprays water flow to break up the thrombus; the waste liquid collecting member communicates with the waste liquid passage for collecting waste liquid. The invention uses the fluid dynamics principle to carry out thrombus removal treatment, the liquid pumped into the suction catheter is pressurized by the pump, and the high-speed liquid forms a negative pressure area, so that thrombus is sucked in, smashed by high-speed water flow and discharged into an external waste liquid bag.

Description

Intravascular thrombus aspiration device

Technical Field

The invention relates to the technical field of intravascular thrombus aspiration, in particular to an intravascular thrombus aspiration device.

Background

Thrombosis and embolism are the pathological basis of most cardiovascular and cerebrovascular diseases such as acute myocardial infarction, ischemic stroke, pulmonary embolism and the like, and are also the leading causes of death and limb disability. Deep vein thrombosis (Deep Venous Thrombosis, DVT) and pulmonary embolism (Pulmonary Embolism, PE), collectively known as venous thromboembolism, are third major vascular diseases next to acute coronary syndrome and ischemic stroke. If not treated in time, DVT can lead to serious complications including early femoral bruising and late post-thrombotic syndrome caused by venous hypertension (Postthrombotic Syndrome, PTS).

Currently, common methods of treating thrombi are anticoagulation, surgical dissection and thrombolysis, direct thrombolysis via catheter (Catheter Directed Thrombolysis, CDT), mechanical thrombectomy (Percutaneous Mechanical Thrombectomy, PMT), balloon dilation (Percutaneous Transluminal Angioplasty, PTA) and stent implantation. Wherein, PMT can effectively clear thrombus in a short time as possible, and simultaneously reduce the dosage of thrombolytic drugs.

The existing suction device comprises a self-sucking pump, a suction catheter and other parts, wherein the distal end of the suction catheter is provided with a needle, and the self-sucking pump is communicated with the suction catheter. When the thrombus is sucked, the needle head is inserted into the arterial blood vessel, and the thrombus in the blood vessel can be sucked out by utilizing the negative pressure of the self-sucking pump. Along with the uninterrupted operation of the self-priming pump, the thrombus in the blood vessel can be continuously extracted, so as to achieve the purpose of clearing the thrombus.

However, such aspiration devices constantly aspirate thrombus during aspiration, and thrombus slowly accumulates in the catheter, particularly at the distal end, while some of the thrombus is relatively bulky and does not undergo shredding or shredding, affecting the flow rate of fluid within the catheter, thereby reducing aspiration range and effectiveness.

Disclosure of Invention

The invention mainly aims at providing an intravascular thrombus suction device, which aims at expanding the suction range and enhancing the suction efficiency.

To achieve the above object, the present invention provides an intravascular thrombus aspiration device comprising:

a pump;

a liquid pipeline, one end of which is communicated with the pump, and the other end of which is suitable for being communicated with a liquid supply device;

the suction catheter is provided with a liquid inlet channel and a waste liquid channel, the liquid inlet channel is communicated with the pump, the distal end of the suction catheter is provided with a suction part, and the suction part is used for generating negative pressure in the distal end of the suction catheter by liquid under the driving of the pump, so that intravascular thrombus is smashed through water flow and sucked into the suction catheter; and

and the waste liquid collecting piece is communicated with the waste liquid channel and is used for collecting waste liquid.

Optionally, the suction catheter comprises an inner tube and an outer tube sleeved on the periphery of the inner tube, the inner tube forms the liquid inlet channel, the waste liquid channel is formed between the inner tube and the outer tube, a plurality of liquid spraying holes are formed at the distal end of the inner tube, and a plurality of liquid outlet holes and a plurality of liquid sucking holes are formed at the distal end of the outer tube;

wherein the liquid spraying holes, the liquid discharging holes and the liquid sucking holes jointly form the suction part; a plurality of the liquid ejecting holes for ejecting liquid in a direction toward a proximal end thereof in the outer tube to generate negative pressure; a plurality of liquid outlet holes for injecting liquid into the blood vessel to break up thrombus in the blood vessel; the plurality of imbibition holes are used for sucking thrombus and liquid into the outer tube under the action of negative pressure.

Optionally, a bending arm is arranged at the distal end of the inner tube, the bending arm is in an annular arrangement, and the plurality of liquid spraying holes are arranged on the bending arm at intervals along the circumferential direction of the bending arm.

Optionally, the diameter of the liquid spraying hole is 0.04 mm-0.08 mm; and/or the number of the liquid spraying holes is 6-10.

Optionally, the pump includes the pump body and the activity set up in the internal piston of pump, the pump body is equipped with the connector, the connector with waste liquid collecting member intercommunication, connector department installs sealing connection spare, in order to seal the connector.

Optionally, the sealing connection piece includes the sealing body and with the tilting arm that the sealing body is connected, the shape of connector with the shape looks adaptation of sealing connection piece, the sealing body with the tilting arm inlays and locates in the connector.

Optionally, the inclined arm includes at least two extending sections with different outer diameters, so that the outer diameter of the inclined arm gradually decreases from the connection position with the sealing body to a direction approaching to the inner cavity of the pump body;

the inclined arm is used for being fused with partial materials melted at the corresponding pump body connecting position during assembly, so that the peripheral wall of the inclined arm is connected with the pump body inner cavity wall into a whole.

Optionally, an inner chamfer is arranged on the inner side of the outer end of the inclined arm, and the size of the inner chamfer is 30-60 degrees;

the inner chamfer is used for being fused with partial materials melted at the corresponding pump body connecting position during assembly, so that the end part of the inclined arm is connected with the pump body inner cavity wall into a whole.

Optionally, the inner chamber top of the pump body is equipped with seal assembly, seal assembly includes sealing washer, sealing washer and compresses tightly the piece, be equipped with the mounting groove on the chamber wall of the pump body inner chamber, the sealing washer install in the mounting groove, the one end of sealing washer inserts and locates in the sealing washer, the other end of sealing washer compress tightly in the inner chamber top of the pump body through compressing tightly the piece.

Optionally, the inner diameter of the sealing ring is smaller than the outer diameter of the sealing gasket; and/or

The compressing piece is a threaded piece, one end of the threaded piece, which is abutted to the sealing gasket, is provided with a surrounding part, and the bottom of the sealing gasket is wrapped by the surrounding part.

In the technical scheme of the invention, the intravascular thrombus aspiration device comprises a pump, a liquid pipeline, an aspiration catheter and a waste liquid collecting piece; one end of the liquid pipeline is communicated with the pump, and the other end of the liquid pipeline is suitable for being communicated with the liquid supply device; the suction catheter is provided with a liquid inlet channel and a waste liquid channel, the liquid inlet channel is communicated with the pump, the distal end of the suction catheter is provided with a suction part, and the suction part is used for generating negative pressure in the distal end of the suction catheter by liquid under the driving of the pump, so that thrombus in a blood vessel is smashed by water flow and sucked into the suction catheter under the action of the negative pressure; the waste liquid collecting member communicates with the waste liquid passage for collecting waste liquid. It can be understood that the invention uses the fluid dynamics principle to perform thrombus removal treatment, the liquid pumped into the suction catheter is pressurized by the pump, the high-speed liquid forms a negative pressure area at the thrombus of the blood vessel, and is broken by the high-speed water flow, so that the thrombus is sucked under the action of the negative pressure and then discharged into the waste liquid collecting piece outside the body, and the thrombus is broken and collected in time, so that the suction range of the suction device is effectively enlarged, and the suction efficiency is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the structure of an embodiment of an intravascular thrombus aspiration device of the present invention;

FIG. 2 is a schematic view showing the structure of the distal end of the inner tube of the aspiration catheter in one embodiment of the intravascular thrombus aspiration device of the present invention;

FIG. 3 is an elevation view of the distal end of the inner tube of the aspiration catheter in one embodiment of the intravascular thrombus aspiration device of the present invention;

FIG. 4 is a schematic view showing the structure of the distal end of the outer tube of the aspiration catheter in one embodiment of the intravascular thrombus aspiration device of the present invention;

FIG. 5 is a cross-sectional view of a pump in one embodiment of an intravascular thrombus aspiration device of the present invention;

FIG. 6 is a schematic view showing the structure of a sealing connection member of a pump in an embodiment of the intravascular thrombus aspiration device of the present invention;

FIG. 7 is a cross-sectional view of an embodiment of the intravascular thrombus aspiration device of the present invention showing the attachment of a sealing connection to a pump;

FIG. 8 is a cross-sectional view of an embodiment of the intravascular thrombus aspiration device of the present invention showing the attachment of a seal assembly to a pump;

fig. 9 is a cross-sectional view of a seal assembly of a pump in another embodiment of an intravascular thrombus aspiration device of the present invention.

Reference numerals illustrate:

10. a pump; 20. a liquid line; 30. a suction catheter; 40. a waste liquid collecting member; 301. a suction unit; 31. an inner tube; 32. an outer tube; 31a, a liquid spraying hole; 32a, a liquid outlet hole; 32b, a liquid suction hole; 311. a bending arm; 11. a pump body; 12. a piston; 11a, connection ports; 13. sealing the connection member; 131. a sealing body; 132. a tilting arm; 1321. an inner chamfer; 14. a seal assembly; 141. a seal ring; 142. a sealing gasket; 143. a pressing member; 1431. and a surrounding part.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides an intravascular thrombus suction device.

Referring to fig. 1, in one embodiment of the present invention, the intravascular thrombus aspiration device includes a pump 10, a fluid line 20, an aspiration catheter 30, and a waste collection member 40; one end of the liquid pipeline 20 is communicated with the pump 10, and the other end of the liquid pipeline 20 is suitable for being communicated with a liquid supply device so as to be filled with sterile heparin brine; the suction catheter 30 is provided with a liquid inlet channel and a waste liquid channel, the distal end of the suction catheter 30 is provided with a suction part 301, and the suction part 301 is used for generating negative pressure on the liquid in the distal end of the suction catheter 30 under the drive of the pump 10 so as to break up thrombus in a blood vessel through water flow and suck the thrombus into the suction catheter 30; the waste liquid collecting member 40 communicates with the waste liquid passage for collecting waste liquid.

The liquid may be physiological saline, in particular, sterile heparin saline, or a predetermined amount of contrast medium may be added to the saline, which is not limited herein.

The waste collection member 40 may be a waste bag or other container body that may contain a liquid, without limitation.

Referring mainly to fig. 2 to 4, in the present embodiment, the suction catheter 30 may include an inner tube 31 and an outer tube 32 sleeved on the outer periphery of the inner tube 31, the inner tube 31 forms a liquid inlet channel, a waste liquid channel is formed between the inner tube 31 and the outer tube 32, a plurality of liquid spraying holes 31a are formed at the distal end of the inner tube 31, and a plurality of liquid outlet holes 32a and a plurality of liquid sucking holes 32b are formed at the distal end of the outer tube 32; wherein the plurality of liquid ejecting holes 31a, the plurality of liquid discharging holes 32a, and the plurality of liquid sucking holes 32b together constitute the suction portion 301; a plurality of liquid ejecting holes 31a for ejecting liquid in a direction toward a proximal end thereof in the outer tube 32 to generate negative pressure; a plurality of liquid outlet holes 32a for injecting liquid into the blood vessel to crush thrombus in the blood vessel; under the action of the negative pressure, thrombus and liquid are sucked into the outer tube 32 through the plurality of suction holes 32 b. In addition, the aspiration catheter 30 of the present embodiment may be provided with a guidewire tube or lumen, etc., which is not limited herein.

Of course, other structures may be adopted for the suction portion 301, and the structure designed to generate negative pressure according to the bernoulli principle may be adopted, and the present invention is not limited thereto.

It will be appreciated that the present invention performs a thrombi removal treatment using the principle of fluid dynamics, pressurizes the fluid pumped into the aspiration catheter 30 by the pump 10, and the high-speed fluid forms a negative pressure region at the vascular thrombi, while the thrombi are broken by the high-speed water flow, thereby sucking the broken thrombi under the action of the negative pressure, and then discharging the thrombi to the waste liquid collecting member 40 outside the body, thereby effectively expanding the aspiration range of the aspiration device and enhancing the aspiration efficiency due to the fact that the thrombi are broken and collected in time.

To further enhance the thrombus aspiration effect, and to further enhance the aspiration effect, the waste liquid can be collected conveniently, referring to fig. 2 and 3, in an embodiment, the distal end of the inner tube 31 may be provided with a bending arm 311, the bending arm 311 may be in a non-closed annular arrangement, and the plurality of liquid spraying holes 31a are disposed on the bending arm 311 at intervals along the circumferential direction of the bending arm 311.

In this embodiment, the bending arm 311 may be provided inside the distal end of the outer tube 32 and outside the aspiration hole 32b, so that the broken thrombus can be sucked in time and washed toward the proximal end of the outer tube 32 for rapid discharge into the waste liquid collecting member 40.

In this embodiment, the diameter of the liquid spraying holes 31a may be 0.04mm to 0.08mm, and the number of the liquid spraying holes 31a may be 6 to 10. In this case, high pressure exists in the cavity of the pump 10, and the highest static pressure can reach 120Mpa.

To enhance the tightness of the pump 10 to ensure no leakage at high pressure and to continuously run for a desired time, thereby further enhancing the pumping effect, referring mainly to fig. 1, 5 to 7, in an embodiment, the pump 10 may include a pump body 11 and a piston 12 movably disposed in the pump body 11, the pump body 11 is provided with a connection port 11a, the connection port 11a is communicated with the inner tube 31, and a sealing connector 13 is installed at the connection port 11a to seal the connection port 11a. Wherein, the bottom of the inner cavity of the pump body 11 is provided with a steel ball.

The principle is that physiological saline flows into the cavity of the pump body 11, the piston 12 moves up and down in the cavity of the pump body 11, the sealing steel ball is arranged in the pump 10, when the piston 12 is in a downward pressure state, the steel ball is adsorbed at the inner bottom of the cavity to realize bottom sealing, at the moment, the water flow is pressed into the suction conduit 30, the water flow is ejected from the liquid spraying hole 31a at the far end of the suction conduit 30 at a high speed backwards (the water flow ejecting direction is towards the near end of the suction conduit 30 as shown in fig. 3), a low pressure area is generated, thereby causing a low pressure effect, thrombus smashed by the ejected water flow is sucked into the suction conduit 30 and then discharged out of the body, and part of the saline water is ejected in a water mist and sucked at the far end to form circulating water flow.

Referring to fig. 6 and 7, in an embodiment, the sealing connection member 13 may include a sealing body 131 and an inclined arm 132 connected to the sealing body 131, the shape of the connection port 11a is adapted to the shape of the sealing connection member 13, and the sealing body 131 and the inclined arm 132 are embedded in the connection port 11a.

The bevel angle of the connection port 11a may be slightly smaller than the inclination angle of the sealing connection member 13, so that the sealing connection member 13 and the pump body 11 are in an interference state, thereby improving the sealing performance.

As shown in fig. 6 and 7, in the present embodiment, the inclined arm 132 may include at least two extending sections (3 extending sections are illustrated) with different outer diameters, so that the outer diameter of the inclined arm 132 gradually decreases from the connection with the sealing body 131 to a direction approaching the inner cavity of the pump body 11. The inclined arms 132 are used to fuse with the melted portion of the material at the connection of the corresponding pump body 11 during assembly, so that the outer peripheral wall of the inclined arms 132 is connected with the inner cavity wall of the pump body 11 into a whole. In this way, the sealability at the connection port 11a can be further improved.

Further, as shown in fig. 6 and 7, the inner side of the outer end of the inclined arm 132 may be provided with an inner chamfer 1321, and the size of the inner chamfer 1321 is 30 ° to 60 °. The inner chamfer 1321 is used for fusing part of the material melted at the joint of the corresponding pump body 11 during assembly, so that the end of the inclined arm 132 is connected with the inner cavity wall of the pump body 11 into a whole, and the compressive strength of the joint is improved.

In this embodiment, the sealing connector 13 may be made of a metal material, for example, 304 or 316 stainless steel, and the inner cavity of the pump body 11 may be made of PA6 and glass fiber, where the glass fiber may increase the compressive strength of the material.

Because the melting point of the PA6 is 220 ℃, when the PA6 is installed, the sealing connecting piece 13 can be heated to 260 ℃ firstly, at the moment, the sealing connecting piece 13 is inserted into the connecting port 11a, because the angle of the bevel edge of the inner cavity of the pump body 11 is smaller than the inclination angle of the sealing connecting piece 13, the sealing connecting piece is in an interference state, at the moment, the inner cavity of the pump body 11 is slightly melted due to heat conduction, the bevel edge of the inner cavity is completely attached to the bevel edge of the sealing connecting piece 13, an inner chamfer 1321 is arranged at the inner side of the tip of the sealing connecting piece 13, at the moment, the inner cavity of the pump body 11 is melted, partial material enters the inner chamfer 1321 of the tip, after the inner cavity of the pump body 11 is cooled, the PA6 material fused into the tip is fused with the PA6 material in the inner cavity of the pump body 11, at the moment, the inner cavity of the pump body 11 and the sealing connecting piece 13 can be regarded as a whole, and the tightness of the joint of the inner cavity and the sealing connecting piece reaches a better level.

It should be noted that, in order to avoid PA6 material from entering the lumen, during the assembly process, after heating the sealing connector 13, the tip of the sealing connector 13 may be quickly placed into cold water and then inserted into the connection port 11a, so that the temperature of the pipe in the sealing connector 13 may be reduced, thereby avoiding blockage of the lumen caused by the melted PA6 material entering the lumen.

In order to further enhance the sealing performance of the pump 10, referring mainly to fig. 5 and 8, in an embodiment, a sealing assembly 14 may be disposed at the top of the inner cavity of the pump body 11, where the sealing assembly 14 includes a sealing ring 141, a sealing pad 142 and a pressing member 143, a mounting groove is disposed on the cavity wall of the inner cavity of the pump body 11, the sealing ring 141 is mounted in the mounting groove, one end of the sealing pad 142 is inserted into the sealing ring 141, and the other end of the sealing pad 142 is pressed into the top of the inner cavity of the pump body 11 by the pressing member 143.

The seal ring 141 may be made of silica gel, and the seal pad 142 may be made of HDPE, PTFE, or the like, but is not limited thereto.

In this embodiment, the inner diameter of the sealing ring 141 may be smaller than the outer diameter of the sealing pad 142 to ensure a tight-fitting connection and avoid seal failure. The pressing member 143 may be a screw member, which is not limited herein.

In another embodiment, as shown in fig. 9, an end of the pressing member 143 abutting against the gasket 142 may be provided with a surrounding portion 1431, and the surrounding portion 1431 wraps the bottom of the gasket 142. The inner diameter of the sealing ring 141 of this embodiment may also be smaller than the outer diameter of the sealing gasket 142, so that the sealing ring 141 is tightly fitted inside the pump 10 cavity, and the pressing member 143 is screwed on the top of the cavity to press the sealing gasket 142.

With reference to fig. 5 and 9, when the piston 12 is operated, it is repeatedly moved up and down, and when the pressure in the chamber is increased, a lateral pressing force is generated on the seal ring 141, and the seal ring 141 itself is expanded upward, thereby sealing the gap between the seal ring and the gasket 142. Due to the existence of the pressing member 143, the pressure in the cavity of the pump body 11 rises, when the gasket 142 is pressed, the gasket expands to two sides further to be tightly attached to the gap between the cavity of the pump body 11 and the pressing member 143, and after all the gaps are completely sealed, the pressure bearing point is converted into a whole from a local weak point.

A circle of surrounding part 1431 is added on the pressing piece 143 to wrap the sealing gasket 142, and the whole height of the pressing piece 143 can meet the requirement that no gap exists between the bottom of the pressing piece 143 and the inner cavity of the pump body 11 during installation. When the pressure rises, the sealing gasket 142 is expanded to two sides under the pressure, and the sealing gasket 142 is completely covered by the pressing piece 143, so that irregular deformation caused by filling gaps between the pressing piece 143 and the inner cavity of the pump body 11 after the sealing gasket 142 is expanded can be avoided, and the bearing pressure is reduced.

In addition, in order to avoid abrasion of the sealing ring 141 due to friction caused by movement of the piston 12, silicone oil may be smeared on the piston 12 to reduce friction resistance and avoid unnecessary loss.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (7)

1. An intravascular thrombus aspiration device, comprising:

the pump comprises a pump body and a piston movably arranged in the pump body;

a liquid pipeline, one end of which is communicated with the pump, and the other end of which is suitable for being communicated with a liquid supply device;

the suction catheter is provided with a liquid inlet channel and a waste liquid channel, the liquid inlet channel is communicated with the pump, the distal end of the suction catheter is provided with a suction part, and the suction part is used for generating negative pressure in the distal end of the suction catheter by liquid under the driving of the pump, so that intravascular thrombus is smashed through water flow and sucked into the suction catheter; and

a waste collection member in communication with the waste channel for collecting waste;

the pump body is provided with a connecting port, the connecting port is communicated with the waste liquid collecting piece, a sealing connecting piece is arranged at the connecting port to seal the connecting port, the sealing connecting piece comprises a sealing body and an inclined arm connected with the sealing body, the shape of the connecting port is matched with that of the sealing connecting piece, the sealing body and the inclined arm are embedded in the connecting port, and the inclined arm comprises at least two extending sections with different outer diameters, so that the outer diameter of the inclined arm gradually decreases from the connecting position of the inclined arm and the sealing body to the direction close to the inner cavity of the pump body; the inclined arm is used for being fused with partial materials melted at the corresponding pump body connecting position during assembly, so that the peripheral wall of the inclined arm is connected with the pump body inner cavity wall into a whole.

2. The endovascular thrombus aspiration device of claim 1, wherein the aspiration catheter comprises an inner tube and an outer tube sleeved on the outer periphery of the inner tube, the inner tube forms the liquid inlet channel, the waste liquid channel is formed between the inner tube and the outer tube, a plurality of liquid spraying holes are formed at the distal end of the inner tube, and a plurality of liquid outlet holes and a plurality of liquid absorbing holes are formed at the distal end of the outer tube;

wherein the liquid spraying holes, the liquid discharging holes and the liquid sucking holes jointly form the suction part; a plurality of the liquid ejecting holes for ejecting liquid in a direction toward a proximal end thereof in the outer tube to generate negative pressure; a plurality of liquid outlet holes for injecting liquid into the blood vessel to break up thrombus in the blood vessel; the plurality of imbibition holes are used for sucking thrombus and liquid into the outer tube under the action of negative pressure.

3. The endovascular thrombus aspiration device of claim 2, wherein the distal end of the inner tube is provided with a crimping arm, the crimping arm being annularly disposed, and a plurality of the spray apertures are circumferentially spaced from the crimping arm.

4. The intravascular thrombus aspiration device of claim 2, wherein the diameter of the spray orifice is 0.04 mm-0.08 mm; and/or the number of the liquid spraying holes is 6-10.

5. The endovascular thrombus aspiration device of claim 1, wherein the outer end of the inclined arm is internally provided with an internal chamfer of a size of 30 ° to 60 °;

the inner chamfer is used for being fused with partial materials melted at the corresponding pump body connecting position during assembly, so that the end part of the inclined arm is connected with the pump body inner cavity wall into a whole.

6. The endovascular thrombus aspiration device of claim 1, wherein a sealing assembly is disposed at the top of the inner cavity of the pump body, the sealing assembly comprises a sealing ring, a sealing gasket and a pressing member, a mounting groove is disposed on the cavity wall of the inner cavity of the pump body, the sealing ring is mounted in the mounting groove, one end of the sealing gasket is inserted into the sealing ring, and the other end of the sealing gasket is pressed into the top of the inner cavity of the pump body by the pressing member.

7. The endovascular thrombus aspiration device as in claim 6 wherein the sealing ring has an inner diameter less than an outer diameter of the sealing pad; and/or

The compressing piece is a threaded piece, one end of the threaded piece, which is abutted to the sealing gasket, is provided with a surrounding part, and the bottom of the sealing gasket is wrapped by the surrounding part.