Thrombectomy device

Abstract

This invention relates to a thrombectomy device. This device, used to remove thrombi along a guidewire, includes a thrombectomy assembly and a thrombectomy assembly. The thrombectomy assembly includes an outer tube, a transmission tube, a drive component, and a thrombectomy head. The outer tube is sleeved over the transmission tube, and one end of the outer tube is connected to the thrombectomy head. The thrombectomy head is used to aspirate and fragment the thrombus, and a thrombectomy blade is disposed within the thrombectomy head. The two ends of the transmission tube are respectively connected to the thrombectomy blade and the drive component. The thrombectomy assembly, used to draw the thrombus to the thrombectomy head, includes a balloon and a multi-lumen tube connected to the balloon. The balloon is inflatable or inflatable with fluid. The multi-lumen tube has an inflation chamber for inflating the balloon and a guidewire chamber for inserting the guidewire. The multi-lumen tube passes sequentially through the transmission tube and the thrombectomy head, allowing the thrombectomy assembly and the thrombectomy assembly to move relative to each other axially. This thrombectomy device can remove thrombi in small-diameter blood vessel areas and can thoroughly remove thrombi adhering to the vessel wall.

Description

[0001] The present application is a divisional application of the Chinese Invention Patent Application No. 2018114814272 with the same applicant, the application date of which is December 5, 2018, and the title of which is "Thrombus removal device". TECHNICAL FIELD

[0002] The present application relates to the technical field of medical devices, in particular to a thrombus removal device. BACKGROUND

[0003] A venous thrombus is a disease caused by the abnormal coagulation of blood in a vein. The venous thrombus can cause the pressure in the vein to increase, the blood to be blocked from flowing back, and the limbs to swell, ache and be dysfunctional. It can also cause a post-thrombotic syndrome, which is life-threatening. Traditionally, thrombus removal is performed by catheter-directed thrombolysis or traditional surgical thrombectomy. However, catheter-directed thrombolysis requires a long time and is not suitable for patients with a high risk of bleeding. Traditional surgical thrombectomy is an invasive operation, which can easily damage the function of the valve and cause wound complications.

[0004] In recent years, mechanical thrombectomy devices have appeared. The devices use a method of dissolving, crushing and suctioning to remove the thrombus in the blood vessel, restore blood circulation and valve function. However, the general mechanical thrombectomy device can only reach the area in the blood vessel with the same diameter as the catheter. The area in the blood vessel with a smaller diameter than the catheter cannot be reached, so the thrombus in the small-diameter blood vessel cannot be removed. Moreover, when the thrombus adheres to the blood vessel wall, the general mechanical thrombectomy device cannot completely remove it, so there is still thrombus remaining on the blood vessel wall. SUMMARY

[0005] Therefore, it is necessary to provide a thrombus removal device to solve the problem of how to more effectively remove the thrombus in the small-diameter blood vessel.

[0006] A thrombus removal device, comprising a thrombus suction assembly and a thrombus removal assembly, wherein,

[0007] The thrombus suction assembly comprises an outer tube, a transmission tube, a driving member and a thrombus suction head. The transmission tube is arranged in the outer tube, and the transmission tube and the outer tube have a gap for discharging thrombus. One end of the outer tube is connected to the thrombus suction head. The thrombus suction head is a hollow structure and is internally provided with a thrombus crushing knife. At least one thrombus removal hole is arranged on the side surface or end surface of the thrombus suction head. The thrombus suction head is used for suctioning and crushing thrombus. The two ends of the transmission tube are respectively connected to the thrombus crushing knife and the driving member. The driving member is used for driving the transmission tube to rotate.

[0008] The thrombus extraction assembly comprises a balloon, a multi-lumen tube and a conical head; the multi-lumen tube is arranged in the transmission tube and the thrombus suction head, the end surface of the thrombus suction head is provided with a thrombus pulling hole, the multi-lumen tube extends from the thrombus pulling hole, and the multi-lumen tube can move along the axial direction of the transmission tube; one end of the multi-lumen tube extending from the thrombus pulling hole is connected with the conical head, the balloon is arranged on the multi-lumen tube and located between the conical head and the thrombus suction head, the multi-lumen tube is provided with a liquid filling cavity and a guide wire cavity for arranging a guide wire, and the inside of the balloon is communicated with the liquid filling cavity; the balloon has a contracted state and an expanded state after being filled with liquid, when the balloon is in the contracted state, the conical head and the balloon can penetrate the thrombus by pushing the multi-lumen tube; when the balloon is in the expanded state, the balloon can pull the thrombus to the vicinity of the thrombus pulling hole by pulling the multi-lumen tube.

[0009] In one of the embodiments, the thrombus extraction assembly further comprises a first connecting member, the first connecting member is arranged on one end of the multi-lumen tube away from the conical head, and the first connecting member is provided with a liquid filling interface communicated with the liquid filling cavity and a guide wire interface communicated with the guide wire cavity.

[0010] In one of the embodiments, the conical head is provided with an inner hole penetrating through both ends of the conical head, and the inner hole is communicated with the guide wire cavity.

[0011] In one of the embodiments, the balloon is arranged outside the multi-lumen tube, and the side wall of the multi-lumen tube is provided with a balloon liquid filling port communicated with the inside of the balloon and the liquid filling cavity.

[0012] In one of the embodiments, the thrombus extraction assembly further comprises a developing wire, the developing wire is arranged outside the multi-lumen tube and located on both sides of the balloon, and the developing wire is used for enabling a medical imaging device to obtain the position of the balloon.

[0013] In one of the embodiments, when the balloon is in the expanded state, the balloon is closely attached to the blood vessel wall, and the balloon is further used for removing the thrombus adhered to the blood vessel wall.

[0014] In one of the embodiments, the thrombus extraction assembly further comprises a second connecting member, the second connecting member is arranged on one end of the outer tube away from the thrombus suction head, the second connecting member is provided with a thrombus interface communicated with the inside of the outer tube and a transmission tube interface, the thrombus interface is used for discharging the thrombus, and the transmission tube interface is used for arranging the transmission tube.

[0015] In one of the embodiments, the thrombus extraction assembly further comprises a negative pressure suction member, the suction inlet of the negative pressure suction member is connected with the thrombus interface, and the discharge outlet of the negative pressure suction member is used to connect a collecting bag.

[0016] In one embodiment, there are multiple bolt-retrieving holes, which are spaced apart around the outer periphery of the bolt-pulling hole.

[0017] In one embodiment, the thrombectomy device is provided with multiple sets of thrombectomy components, and the multi-lumen tube of each set of thrombectomy components can be movably inserted into the transmission tube and the suction head, and the multiple sets of thrombectomy components are respectively sleeved on different guide wires.

[0018] The aforementioned thrombectomy device features a multi-lumen tube movably inserted within the transmission tube of the thrombectomy assembly, and an inflatable balloon within this tube. This allows it to reach small-diameter blood vessels inaccessible to the external tube of the thrombectomy assembly. By moving the multi-lumen tube closer to the thrombus, the tube and balloon pass through the thrombus. Inflation of the balloon through the multi-lumen tube's inflation chamber causes the balloon to expand. Pulling the multi-lumen tube away from the thrombus pulls the inflated balloon towards the vicinity of the aspiration head. The aspiration head then sucks in and breaks up the thrombus, thus removing it. Furthermore, the inflated balloon adheres tightly to the vessel wall, allowing for thorough removal of thrombi adhering to the vessel wall during traction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a thrombectomy device according to an embodiment of this application;

[0020] Figure 2 for Figure 1 A cross-sectional view of section AA of the thrombectomy device shown;

[0021] Figure 3 for Figure 1 The diagram shows the structure of the thrombectomy assembly of the thrombectomy device.

[0022] Figure 4 for Figure 3 A schematic diagram of the balloon contraction state of the thrombectomy assembly shown;

[0023] Figure 5 for Figure 3 A schematic diagram of the balloon inflation state of the thrombectomy assembly shown;

[0024] Figure 6 This is a schematic diagram of the suction head according to an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of the suction head according to another embodiment of this application;

[0026] Figure 8 This is a schematic diagram of the use of the thrombectomy device according to an embodiment of this application;

[0027] Figure 9 This is a schematic diagram illustrating the use of a thrombectomy device according to another embodiment of this application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 100, thrombus removing device; 111, outer tube; 1111, gap; 112, transmission tube; 113, thrombus suction head; 1131, thrombus pulling hole; 1132, thrombus removing hole; 114, driving member; 115, thrombus breaking knife; 116, negative pressure suction member; 1161, hose; 117, collection bag; 118, second connecting member; 1181, thrombus suction interface; 1182, transmission tube interface; 121, multi-lumen tube; 1211, liquid filling lumen; 1212, guide wire lumen; 1213, balloon liquid filling port; 122, balloon; 123, first connecting member; 1231, liquid filling interface; 1232, guide wire interface; 124, conical head; 125, developing wire; 200, guide wire; 300, syringe; 400, blood vessel; 410, thrombus; 500, thrombus removing device; 510, thrombus suction assembly; 520, thrombus removing assembly. DETAILED DESCRIPTION

[0030] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0031] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] Reference Signs List Figures 1-8One embodiment of the present application provides a thrombus extraction device 100 for removing thrombus along a guide wire 200, especially for removing thrombus in a small diameter blood vessel. Specifically, the thrombus extraction device 100 of one embodiment includes a thrombus suction assembly for sucking, crushing and discharging thrombus, and a thrombus extraction assembly for pulling thrombus from a blood vessel to the vicinity of the thrombus suction assembly along the guide wire 200. Here, the guide wire 200 is a metal wire line pre-implanted in the blood vessel and passing through the thrombus before the thrombus extraction operation, and is used for guiding the thrombus extraction device 100.

[0034] Specifically, the thrombus suction assembly includes an outer tube 111, a transmission tube 112, a thrombus suction head 113 and a driving member 114. The transmission tube 112 is arranged in the outer tube 111, and there is a gap 1111 between the outer tube 111 and the transmission tube 112. The thrombus sucked and crushed can be discharged through the gap 1111. Further, one end of the outer tube 111 is connected with the thrombus suction head 113, and the thrombus suction head 113 is used for sucking and crushing thrombus. The thrombus suction head 113 is provided with a thrombus crushing knife 115 for crushing thrombus. The two ends of the transmission tube 112 are respectively connected with the thrombus crushing knife 115 and the driving member 114, so as to transmit the torque of the driving member 114 to drive the thrombus crushing knife 115 to rotate. Preferably, the driving member 114 can be a rotary motor, the material of the thrombus suction head 113 is metal or medical polymer and metal composite material, the material of the outer tube 111 is medical polymer material or medical polymer and metal composite material, and the material of the transmission tube 112 is metal or medical polymer and metal composite material.

[0035] Further, the thrombus extraction assembly is arranged through the thrombus suction assembly and can move axially relative to the thrombus suction assembly. Specifically, the thrombus extraction assembly includes a multi-lumen tube 121 and a balloon 122 arranged on the multi-lumen tube 121. Specifically referring to Figure 2 , the multi-lumen tube 121 is arranged in the transmission tube 112 and the thrombus suction head 113, and can move axially relative to the transmission tube 112. Further, the diameter of the multi-lumen tube 121 is smaller than the diameter of the transmission tube 112 of the thrombus suction assembly, the diameter of the thrombus pulling hole 1131 of the thrombus suction head 113 and the diameter of the middle through hole of the thrombus crushing knife 115 in the thrombus suction head 113, so that the multi-lumen tube 121 can pass through the transmission tube 112 and the thrombus suction head 113 in turn. Further, the multi-lumen tube 121 is provided with a liquid filling cavity 1211 for filling the balloon 122 with liquid and a guide wire cavity 1212 for arranging the guide wire 200. The interior of the balloon 122 is in communication with the liquid filling cavity 1211, so that the balloon can be inflated by filling liquid or gas in the liquid filling cavity 1211 to make the balloon expand. Specifically, the balloon 122 has a contracted state (as shown in Figure 4 ) and an expanded state after being filled with liquid (as shown in Figure 5(As shown). In the contracted state, the balloon 122 adheres to the surface of the multilumen tube 121, allowing the balloon 122 to follow the multilumen tube 121 through the thrombus. In the inflated state, the balloon 122 increases in volume after being inflated, so that the surface of the balloon 122 adheres tightly to the inner wall of the blood vessel, and as shown... Figure 8 As shown, at this time, the balloon 122 is located on the side of the thrombus away from the aspirator head 113. Therefore, after pulling the multi-lumen tube 121, the inflated balloon 122 can push the thrombus to the vicinity of the aspirator head 113. In some small-diameter areas of blood vessels that the aspirator assembly cannot reach, the doctor can move the thrombectomy assembly relative to the aspirator assembly by pushing the multi-lumen tube 121. This allows the tip of the multi-lumen tube 121 and the deflated balloon 122 to continue advancing along the guidewire 200 and passing through the thrombus. After inflating the balloon 122, pulling the multi-lumen tube 121 back pulls the thrombectomy assembly back, allowing the balloon 122 to draw the thrombus in the small-diameter area of ​​the blood vessel to the aspirator head 113 for aspiration and fragmentation. Preferably, the balloon 122 is made of medical-grade silicone, latex, or an elastomer polymer. The multi-lumen tube 121 is made of a medical-grade polymer or a composite material of medical-grade polymer and metal. Furthermore, the multi-lumen tube 121 is a flexible tube, which allows it to bend and follow the direction of the blood vessel.

[0036] The aforementioned thrombectomy device 100, by movably inserting a multi-lumen tube 121 within the transmission tube 112 of the thrombectomy assembly, and by placing a fluid-filled, inflatable balloon 122 within the multi-lumen tube 121, allows for the removal of small-diameter blood vessels inaccessible to the outer tube 111 of the thrombectomy assembly. By pushing the multi-lumen tube 121 towards the thrombus, the multi-lumen tube 121 and balloon 122 pass through the thrombus. Fluid is then injected into the balloon 122 through the fluid-filled chamber of the multi-lumen tube 121, inflating it. Pulling the multi-lumen tube 121 away from the thrombus then causes the inflated balloon 122 to draw the thrombus towards the vicinity of the aspiration head 113. The aspiration head 113 then sucks in and breaks up the thrombus, thus removing it. Furthermore, the inflated balloon 122 adheres tightly to the inner wall of the blood vessel, and when pulled, it can effectively remove thrombi adhering to the vessel wall.

[0037] See Figure 1 and Figure 2In one of the embodiments, the thrombus extraction assembly further comprises a first connector 123, which is sleeved on the first end of the multi-lumen tube 121, i.e. the first connector 123 is sleeved on the end of the multi-lumen tube 121 away from the balloon 122. Further, the first connector 123 is provided with a liquid filling interface 1231 and a guide wire interface 1232. Specifically, the liquid filling interface 1231 is in communication with the liquid filling lumen 1211 of the multi-lumen tube 121, and is used for injecting liquid into the liquid filling lumen 1211 to inflate the balloon 122. Further, the liquid filling interface 1231 can also be connected with a syringe 300, so as to facilitate the injection of liquid into the liquid filling lumen 1211. The guide wire interface 1232 is in communication with the guide wire lumen 1212, and the guide wire interface 1232 is used for the guide wire 200 to pass through. Preferably, the first connector 123 is made of a medical polymer material.

[0038] Referring to Figure 2 and Figure 3 In one of the embodiments, the thrombus extraction assembly further comprises a tapered head 124, which is connected with the second end of the multi-lumen tube 121, i.e. the tapered head 124 is connected with the end of the multi-lumen tube 121 away from the first connector 123. Specifically, the tapered head 124 is a hollow structure, and the tapered head 124 is provided with an inner hole penetrating through both ends thereof, which is in communication with the guide wire lumen 1212 and enables the guide wire 200 to pass through the guide wire lumen 1212 and out of the tapered head 124. Further, the diameter of the tapered head 124 gradually increases in the direction close to the first connector 123, so as to more easily pass through the thrombus and prevent the damage to the inner wall of the blood vessel. Preferably, the tapered head 124 is made of a medical polymer material.

[0039] Referring to Figure 3 and Figure 4 In one of the embodiments, the balloon 122 is sleeved outside the multi-lumen tube 121, and the sidewall of the multi-lumen tube 121 is provided with a balloon liquid filling port 1213 in communication with the liquid filling lumen 1211 and the inside of the balloon 122, which is used for liquid filling of the balloon 122. Further, the thrombus extraction assembly further comprises a developing wire 125, which is arranged outside the multi-lumen tube 121 and located on both sides of the balloon 122. The developing wire 125 has developing property, so that the medical imaging equipment can obtain the position of the balloon 122 during the thrombus extraction process. Preferably, the developing wire 125 is made of a medical polymer material or a metal material.

[0040] Referring to Figure 1, specifically, the thrombus suction assembly further comprises a second connecting member 118 sleeved on one end of the outer tube 111 away from the thrombus suction head 113, and the second connecting member 118 is provided with a thrombus suction interface 1181 and a transmission tube interface 1182. The thrombus suction interface 1181 is in communication with the inside of the outer tube 111, so that the thrombus between the outer tube 111 and the transmission tube 112 is discharged from the thrombus suction interface 1181. The transmission tube interface 1182 is used for penetrating the transmission tube 112.

[0041] Further, the thrombus suction interface 1181 is connected with a negative pressure suction member 116 for providing negative pressure to suck out the thrombus. Specifically, the suction inlet of the negative pressure suction member 116 is connected with the thrombus suction interface 1181 through a hose 1161. The discharge outlet of the negative pressure suction member 116 is used to connect a collection bag 117 to collect the thrombus. Preferably, the negative pressure suction member 116 can be a negative pressure pump.

[0042] Referring to Figure 6 , the thrombus suction head 113 of an embodiment is a hollow structure, and the end face of the thrombus suction head 113 is provided with a pull plug hole 1131 for penetrating the multi-cavity tube 121, and the multi-cavity tube 121 penetrates out from the pull plug hole. Further, at least one thrombus extraction hole 1132 is provided on the side face of the thrombus suction head 113, and the thrombus extraction hole 1132 is used for sucking in the thrombus. The thrombus breaking knife 115 is arranged in the thrombus suction head 113 and sleeved outside the multi-cavity tube 121, and connected with the transmission tube 112. Specifically, the thrombus breaking knife 115 is provided with an intermediate through hole (not shown), and the intermediate through hole is in communication with the pull plug hole 1131, and the multi-cavity tube 121 penetrates through the intermediate through hole and the pull plug hole 1131 in sequence and extends out from the thrombus suction head 113. The side face of the thrombus breaking knife 115 is a blade, and the thrombus extraction hole 1132 faces the blade, so that after the thrombus enters from the thrombus extraction hole 1132, it can be broken by the blade.

[0043] Referring to Figure 7 , in another embodiment, the thrombus suction head 113 is a hollow structure, and the end face of the thrombus suction head 113 is provided with a pull plug hole 1131 for penetrating the multi-cavity tube 121 and a thrombus extraction hole 1132 for sucking in the thrombus. The thrombus breaking knife 115 is arranged in the thrombus suction head 113 and sleeved outside the multi-cavity tube 121. Specifically, the thrombus breaking knife 115 is provided with an intermediate through hole (not shown), and the intermediate through hole is in communication with the pull plug hole 1131, and the multi-cavity tube 121 penetrates through the intermediate through hole and the pull plug hole 1131 in sequence and extends out from the thrombus suction head 113. The end face of the thrombus breaking knife 115 is a blade, and the thrombus extraction hole 1132 faces the blade. Further, the end face of the thrombus suction head 113 can be directly integrally formed with the side peripheral face of the thrombus suction head 113, or a hollow baffle can be covered on the distal end of the thrombus suction head 113 in the shape of a hollow cylinder to form the above-mentioned end face provided with the pull plug hole 1131 and the thrombus extraction hole 1132.

[0044] Further, please continue to refer to Figure 7In this embodiment, the pull plug hole 1131 is arranged at the center of the end surface of the suction plug head 113, and the multi-lumen tube 121 passes through the pull plug hole 1131. The number of the suction plug holes 1132 is multiple, and the multiple suction plug holes 1132 are arranged at intervals around the outer periphery of the pull plug hole 1131. The multiple suction plug holes 1132 can accelerate the suction of the thrombus.

[0045] Please continue to see Figures 1-8 During the operation, the blood vessel 400 is first punctured, and then one end of the guide wire 200 is inserted into the diseased blood vessel and passes through the thrombus 410, while the other end of the guide wire 200 is inserted into the guide wire lumen 1212 of the thrombus extraction device 100. The front end of the thrombus extraction device 100 is sent into the blood vessel along the guide wire 200, and after being sent to the stenosis of the blood vessel 400, the suction plug assembly is kept stationary, and the thrombus extraction assembly is continuously moved along the guide wire 200 to pass through the diseased thrombus 410 by pushing the first connecting piece 123. Then the syringe 300 is connected with the liquid filling interface 1231, and the balloon 122 is inflated to the balloon 122 adhering to the blood vessel wall by using iopamidol. The thrombus extraction assembly is moved to the suction plug head 113 by pulling the first connecting piece 123, and at the same time, the driving piece 114 and the negative pressure suction piece 116 of the suction plug assembly are opened. The thrombus is cut by the thrombus cutter 115 in the suction plug head 113, and at the same time, the negative pressure generated by the negative pressure suction piece 116 can remove the thrombus into the collection bag 117. When the thrombus is removed, the balloon 122 is depressurized to restore to the contracted state, and the driving piece 114 and the negative pressure suction piece 116 are turned off. The thrombus extraction is completed, and the thrombus extraction device 100 is withdrawn from the body.

[0046] See Figure 9 In another embodiment, a group of suction plug assemblies can also be equipped with multiple groups of thrombus extraction assemblies, so that the thrombus in the lumen of multiple branched blood vessels can be cleaned at the same time. Specifically, the thrombus extraction device 500 of an embodiment is used to remove the thrombus in different blood vessels along multiple guide wires 200. The thrombus extraction device 500 includes a suction plug assembly 510 and multiple groups of thrombus extraction assemblies 520. The suction plug assembly 510 is similar to the structure of the thrombus extraction assembly described in the foregoing embodiments, including an outer tube, a transmission tube, a suction plug head, and a driving piece. The outer tube is sleeved outside the transmission tube, and there is a gap between the outer tube and the transmission tube, through which the thrombus can be removed after being sucked and crushed. Further, one end of the outer tube is connected with the suction plug head, and the suction plug head is used to suck and crush the thrombus. The suction plug head is provided with a thrombus cutter for crushing the thrombus, and the two ends of the transmission tube are connected with the thrombus cutter and the driving piece respectively, so as to transmit the torque of the driving piece to drive the thrombus cutter to rotate. Preferably, the driving piece can be a rotary motor, the suction plug head is a metal or a medical polymer and metal composite material, the outer tube is a medical polymer material or a medical polymer and metal composite material, and the transmission tube is a metal or a medical polymer and metal composite material.

[0047] Further, the plurality of thrombus extraction assemblies 520 are movably arranged through the transmission tube and the driving member, so that each of the thrombus extraction assemblies 520 can move relative to the thrombus suction assembly 510. Specifically, each of the thrombus extraction assemblies 520 comprises a balloon and a multi-lumen tube connected with the balloon, wherein the balloon can be deflated or inflated, i.e., the balloon has a deflated state and an inflated state after being inflated, and in the deflated state, the balloon is attached to the surface of the multi-lumen tube. In the inflated state, the balloon has a larger volume and is tightly attached to the inner wall of the blood vessel. The multi-lumen tube is provided with an inflation lumen for inflating the balloon and a guide wire lumen for arranging a guide wire. Specifically, the guide wire lumens of the multi-lumen tubes are respectively arranged with different guide wires, so that the plurality of thrombus extraction assemblies 520 can move along different guide wires to different blood vessel branches, thereby pulling the thrombus in different blood vessel branches to the thrombus suction head accessory.

[0048] It should be noted that the thrombus suction assembly 510 and other features of each of the thrombus extraction assemblies 520 can be the same as those of the previous embodiment, and will not be described here.

[0049] The thrombus suction assembly 510 of the thrombus extraction device 500 described above is arranged with a plurality of thrombus extraction assemblies 520, and each of the thrombus extraction assemblies 520 can move relative to the thrombus suction assembly 510, so that in some small-diameter blood vessel regions with multiple branches that cannot be reached by the outer tube of the thrombus suction assembly 510, the plurality of thrombus extraction assemblies 520 can be moved along different guide wires to different blood vessel branches, respectively, and the thrombus in different blood vessel branches can be pulled to the thrombus suction head accessory by the balloon that can be inflated, thereby improving the thrombus extraction efficiency. Moreover, the thrombus suction head can suck and crush the thrombus, and then remove the thrombus. At the same time, the balloon can be tightly attached to the inner wall of the blood vessel after being inflated, and when being pulled, the thrombus adhering to the wall of the blood vessel can be completely removed.

[0050] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present disclosure.

[0051] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A thrombus removal device, characterized in that, Includes a suction thrombectomy assembly and a thrombectomy assembly, wherein: The thrombectomy assembly includes an outer tube, a transmission tube, a drive component, and a thrombectomy head. The transmission tube passes through the outer tube, and there is a gap between the transmission tube and the outer tube for expelling the thrombus. One end of the outer tube is connected to the thrombectomy head, which has a hollow structure. The end face of the thrombectomy head has a thrombectomy hole, and the side of the thrombectomy head has at least one thrombectomy hole. The thrombectomy head is equipped with a thrombectomy knife inside. The thrombectomy head is used to aspirate and crush the thrombus. The two ends of the transmission tube are respectively connected to the thrombectomy knife and the drive component, and the drive component is used to drive the transmission tube to rotate. The thrombectomy assembly includes a balloon, a multi-lumen tube, and a conical head. The multi-lumen tube passes through the transmission tube and the aspirator head, extends from the thrombectomy hole, and is axially movable along the transmission tube. One end of the multi-lumen tube extending from the thrombectomy hole is connected to the conical head. The balloon is fitted onto the multi-lumen tube and located between the conical head and the aspirator head. The multi-lumen tube has an inflation chamber and a guidewire chamber for inserting a guidewire. The interior of the balloon communicates with the inflation chamber. The balloon has a contracted state and an inflated state after inflation. When the balloon is in the contracted state, pushing the multi-lumen tube towards the thrombus causes the conical head and the balloon to penetrate the thrombus. When the balloon is in the inflated state, the balloon fits tightly against the vessel wall, and pulling the multi-lumen tube away from the thrombus causes the balloon to pull the thrombus to the vicinity of the thrombectomy hole. The thrombectomy assembly is provided in multiple sets, and the multi-lumen tube of each set of the thrombectomy assembly can be movably inserted into the transmission tube and the suction head, and the multiple sets of the thrombectomy assembly are respectively sleeved on different guide wires.

2. The thrombectomy device according to claim 1, characterized in that, The balloon is fitted over the multi-lumen tube, and the side wall of the multi-lumen tube has a balloon filling port that connects the filling chamber to the inside of the balloon.

3. The thrombectomy device according to claim 1, characterized in that, The thrombectomy assembly also includes a radiopaque wire, which is disposed outside the multi-lumen tube and located on both sides of the balloon. The radiopaque wire is used to allow medical imaging equipment to obtain the position of the balloon.

4. The thrombectomy device according to claim 1, characterized in that, The thrombectomy assembly further includes a first connector, which is sleeved on the end of the multi-lumen tube away from the conical head. The first connector is provided with a filling interface communicating with the filling cavity and a guide wire interface communicating with the guide wire cavity.

5. The thrombectomy device according to claim 1, characterized in that, The conical head has an inner hole that extends through both ends of itself, and the inner hole is connected to the guide wire cavity.

6. The thrombectomy device according to claim 1, characterized in that, The thrombectomy assembly further includes a second connector, which is sleeved on the end of the outer tube away from the thrombectomy head. The second connector is provided with a thrombectomy interface and a transmission tube interface that communicate with the interior of the outer tube. The thrombectomy interface is used to expel the thrombus, and the transmission tube interface is used to insert the transmission tube.

7. The thrombectomy device according to claim 6, characterized in that, The suction plug assembly also includes a negative pressure suction component, the suction port of which is connected to the suction plug interface, and the discharge port of which is used to connect to a collection bag.

8. The thrombectomy device according to claim 1, characterized in that, The number of bolt-retrieving holes is multiple, and the multiple bolt-retrieving holes are spaced apart around the outer periphery of the bolt-pulling hole.

9. The thrombectomy device according to claim 1, characterized in that, The guidewire cavity extends axially along the multi-lumen tube and passes through both ends of the multi-lumen tube.

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