Thrombus breaking device and thrombus removing equipment

Abstract

The utility model provides a thrombus breaking device and thrombus removal equipment, and relates to the medical instrument field, the thrombus breaking device comprises a thrombus breaking part and a control handle part, the thrombus breaking part comprises a rotating tube, an expandable net and a traction assembly, the expandable net is arranged at the far end of the rotating tube, and the traction assembly is arranged in the rotating tube. The distal end of the traction assembly is coupled to the expandable mesh. The thrombus on the inner wall of the blood vessel is removed by friction through rotation of the expandable net, the expandable net is latticed and can be pressed to deform when encountering overlarge resistance, the inner wall of the blood vessel is not damaged, the diameter of the expandable net can be controlled through the relative position of the traction assembly and the rotating tube, and under driving of the driving assembly, the thrombus on the inner wall of the blood vessel is removed. The expandable net rotates and reciprocates in the axial direction at the same time, and due to the reciprocating motion of the expandable net, thrombus can be impacted during rotary cutting, so that the thrombus breaking efficiency and the thrombus removing effect are improved.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a thrombus breaking device and a thrombus removing device. Background Art

[0002] Thrombosis can cause limb swelling, pain, ulcers, and even pulmonary embolism, which is life-threatening. Clinically, it is mainly treated by thrombus aspiration, thrombolysis, or mechanical thrombectomy. Thrombolysis is used, but because the treatment is slow, the conditions that can be treated are limited, and there are some complications, most patients, especially emergency patients, eventually use mechanical thrombectomy for treatment. Mechanical thrombectomy (PMT) is the main method for treating venous thromboembolism. The equipment required to implement this method includes a mechanical thrombectomy device, and its quality and performance directly affect the treatment effect.

[0003] A mechanical thrombus removal device in the prior art scrapes the thrombus on the inner wall of the blood vessel using a thrombus removal stent. The operation resistance is large, and the force acting on the thrombus is direct. The thrombus removal stent will not adjust its shape by itself when encountering resistance. This hard-on-hard operation process is not very comfortable and is likely to cause damage to the inner wall of the blood vessel, which needs to be improved. Utility Model Content

[0004] The utility model provides a thrombus breaking device and thrombus removal equipment, which are used to solve the problems of large operating resistance and poor comfort of thrombus removal bracket in the thrombus breaking device in the prior art.

[0005] The utility model provides a thrombus breaking device, comprising:

[0006] The thrombus-breaking component comprises a rotating tube, an expandable net and a traction assembly, wherein the expandable net is arranged at the distal end of the rotating tube, the traction assembly is arranged in the rotating tube, the distal end of the traction assembly is connected to the expandable net, and the traction assembly is used to drive the expandable net to open and close;

[0007] The control handle component includes a handle shell and a drive assembly. The proximal end of the rotating tube is rotatably connected to the handle shell. The drive assembly is arranged in the handle shell and connected to the rotating tube. The drive assembly is used to drive the rotating tube to rotate axially and drive the rotating tube to reciprocate axially.

[0008] According to a thrombus fragmentation device provided in an embodiment of the utility model, the driving assembly includes:

[0009] Drive motor;

[0010] A transmission mechanism connected to the drive shaft of the drive motor and the proximal end of the rotating tube, wherein the drive motor is used to drive the rotating tube to rotate axially through the transmission mechanism;

[0011] The reciprocating mechanism includes a reciprocating wheel and a limiting member. The reciprocating wheel is sleeved on the proximal end of the rotating tube. A guide groove is provided on the outer peripheral surface of the reciprocating wheel. The guide groove is inclined relative to the cross-section of the rotating tube. The first end of the limiting member is connected to the handle housing, and the second end of the limiting member is slidably matched with the guide groove.

[0012] According to a thrombus breaking device provided in an embodiment of the utility model, the transmission mechanism comprises:

[0013] A driving gear connected to a driving shaft of the driving motor;

[0014] The driven gear is sleeved on the proximal end of the rotating tube, and the driving gear is meshed with the driven gear.

[0015] According to a thrombus fragmentation device provided in an embodiment of the utility model, the traction assembly includes:

[0016] A traction line, wherein a guide head is provided at the distal end of the expandable net, and the distal end of the traction line is connected to the guide head;

[0017] A screw rod, the distal end of which is connected to the proximal end of the traction line, the proximal end of which extends out of the proximal end of the rotating tube and is threadedly matched with the holding piece.

[0018] According to a thrombus fragmentation device provided in an embodiment of the utility model, the traction assembly includes:

[0019] A traction line, a guide head is arranged at the distal end of the expandable net, and the distal end of the traction line is connected to the guide head; a winding wheel is arranged at the proximal end of the handle shell, and the proximal end of the traction line is wound around the winding wheel.

[0020] According to a thrombus fragmentation device provided by an embodiment of the utility model, the material of the expandable net is an elastic memory material or an expandable polymer fiber.

[0021] The utility model also provides a thrombus removal device, comprising a suction catheter component and any one of the above-mentioned thrombus fragmentation devices, wherein the suction catheter component comprises a suction catheter, a funnel-shaped tip and a Luer connector, wherein the suction catheter is sleeved on the outer periphery of the distal end of the rotating tube, the funnel-shaped tip is arranged at the distal end of the suction catheter and surrounds the outer periphery of the rotating tube; a suction cavity is formed between the suction catheter and the rotating tube, and the Luer connector is arranged at the proximal end of the suction catheter and communicated with the suction cavity.

[0022] According to a thrombus removal device provided by an embodiment of the utility model, the funnel-shaped tip is composed of an opening portion, an expansion portion and a thin neck portion which are connected in sequence, the opening portion is provided with an opening on a side facing the expandable net, the thin neck portion is connected to the distal end of the rotating tube, and the cross-sectional areas of the opening portion, the expansion portion and the thin neck portion decrease in sequence.

[0023] According to a thrombus removal device provided in an embodiment of the utility model, the funnel-shaped tip comprises:

[0024] A mesh skeleton connected to the distal end of the rotating tube;

[0025] The film covers the mesh frame.

[0026] According to a thrombus removal device provided by an embodiment of the utility model, the material of the film is polyamide or polyurethane thermoelastic material, the Shore hardness of the film is 30HD-45HD, and the thickness of the film is 0.05-0.15mm; the material of the mesh skeleton is memory alloy.

[0027] The thrombus crushing device provided in the embodiment of the utility model removes the thrombus on the inner wall of the blood vessel by friction through the rotation of the expandable net. Since the expandable net is in a grid shape, it can be deformed when encountering too much resistance, so as not to cause damage to the inner wall of the blood vessel. In addition, the diameter of the expandable net can be controlled by the relative position of the traction component and the rotating tube, and it is compatible with more complex blood vessels, avoiding the need to replace the thrombus removal system midway due to the mismatch between the expandable net and the blood vessel. Furthermore, under the drive of the driving component, the expandable net rotates and reciprocates axially at the same time. Due to the reciprocating movement of the expandable net, the thrombus can be impacted during rotational cutting, thereby improving the efficiency of thrombus crushing and the thrombus removal effect. The thrombus crushing device provided in the embodiment of the utility model has the characteristics of strong operability during surgery, shortens the operation time, and provides an efficient, safe, and non-invasive vascular thrombus removal method. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is one of the schematic diagrams of the side cross-sectional structure of the thrombus removal device provided by the embodiment of the utility model;

[0030] Figure 2This is the second schematic diagram of the side cross-sectional structure of the thrombus removal device provided by the embodiment of the utility model;

[0031] Figure 3 It is a side view structural schematic diagram of a funnel-shaped tip provided by an embodiment of the utility model;

[0032] Figure 4 It is a schematic diagram of the main structure of another funnel-shaped tip provided by an embodiment of the utility model;

[0033] Figure 5 It is a schematic diagram of the working principle of removing thrombus by the thrombus removal device provided in an embodiment of the utility model.

[0034] Reference numerals:

[0035] 100, thrombus breaking component; 110, rotating tube; 120, expandable net; 130, traction assembly; 131, traction line; 132, screw rod; 133, holding member;

[0036] 200, control handle component; 210, handle housing; 211, winding wheel; 220, driving assembly; 221, driving motor; 222, reciprocating wheel; 223, limiting member; 224, guide groove; 225, driving gear; 226, driven gear;

[0037] 300, suction catheter component; 310, suction catheter; 320, funnel-shaped tip; 321, opening; 322, expansion portion; 323, narrow neck; 324, film; 325, mesh skeleton; 330, Luer connector;

[0038] 400. Thrombosis;

[0039] 500. Blood vessels. DETAILED DESCRIPTION

[0040] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0041] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0042] The definitions of "distal end" and "proximal end" in the present invention are as follows: the distal end refers to the end of the medical device that first enters the patient's body during normal operation, and the proximal end refers to the end of the medical device that is close to the operator during normal operation.

[0043] Combine the following Figure 1-Figure 5 The thrombus fragmentation device according to the embodiment of the utility model is described.

[0044] Figure 1 One of the schematic diagrams of the side cross-sectional structure of the thrombus removal device provided by the embodiment of the utility model is illustrated, such as Figure 1 As shown, the thrombus-breaking device includes a thrombus-breaking component 100 and a control handle component 200. The thrombus-breaking component 100 includes a rotating tube 110, an expandable net 120 and a traction assembly 130. The expandable net 120 is disposed at the distal end of the rotating tube 110. The traction assembly 130 is disposed in the rotating tube 110. The distal end of the traction assembly 130 is connected to the expandable net 120. The traction assembly 130 is used to drive the expandable net 120 to open and close. The control handle component 200 includes a handle housing 210 and a drive assembly 220. The proximal end of the rotating tube 110 is rotatably connected to the handle housing 210. The drive assembly 220 is disposed in the handle housing 210 and is connected to the rotating tube 110. The drive assembly 220 is used to drive the rotating tube 110 to rotate axially and drive the rotating tube 110 to reciprocate axially (i.e. Figure 1 left and right directions in the image).

[0045] The thrombus crushing device provided in the embodiment of the utility model removes the thrombus 400 on the inner wall of the blood vessel 500 by friction through the rotation of the expandable net. Since the expandable net 120 is in a grid shape, it can be deformed when encountering excessive resistance, so as not to cause damage to the inner wall of the blood vessel 500. In addition, the diameter of the expandable net 120 can be controlled by the relative position of the traction component 130 and the rotating tube 110, and it can be compatible with more complex blood vessels, avoiding the need to replace the thrombus removal system midway due to the mismatch between the expandable net and the blood vessel. Furthermore, under the drive of the driving component 220, the expandable net 120 rotates and reciprocates along the axial direction. Due to the reciprocating movement of the expandable net 120, the thrombus 400 can be impacted during rotational cutting, thereby improving the efficiency of thrombus crushing and the thrombus removal effect. The thrombus crushing device provided in the embodiment of the utility model has the characteristics of strong operability during surgery, shortens the operation time, and provides an efficient, safe, and non-invasive vascular thrombus removal method.

[0046] In an embodiment of the utility model, the expandable mesh 120 is woven from a memory alloy wire. The expandable mesh 120 has strong elasticity and can be deformed when encountering excessive resistance, so that the diameter of the expandable mesh 120 is reduced to avoid damage to the inner wall of the blood vessel 500. The mesh of the expandable mesh 120 is diamond-shaped. Of course, the form of the mesh is not limited to this, and is determined according to actual needs. The proximal end of the expandable mesh 120 is hot-melt connected to the rotating tube 110, and the distal end of the expandable mesh 120 is connected to the guide head by riveting, hot melting or adhesive. The expandable mesh 120 is olive-shaped, elliptical or spherical. The material of the expandable mesh 120 is an elastic memory material or an expandable polymer fiber. The elastic memory material can specifically be a superelastic nickel-titanium alloy.

[0047] During use, the expanded diameter of the expandable net 120 is adjusted according to the inner diameter of the blood vessel 500, so that the expandable net 120 can better fit the inner wall of the blood vessel 500 and reduce the pressure on the inner wall of the blood vessel 500. The controllable diameter of the expandable net 120 can cover the blood vessel 500 with an inner diameter of 3mm-30mm; the diameter of the expandable net 120 can be adjusted as needed, and can be compatible with more complex blood vessels 500. It is highly operable during the operation, avoiding the need to replace the embolization system midway due to the mismatch between the expandable net 120 and the blood vessel 500, thereby shortening the operation time.

[0048] In an embodiment of the utility model, the drive assembly 220 includes a drive motor 221, a transmission mechanism and a reciprocating mechanism. The drive motor 221 is fixed in the handle housing 210. The transmission mechanism is connected to the drive shaft of the drive motor 221 and the proximal end of the rotating tube 110. The drive motor 221 is used to drive the rotating tube 110 to rotate axially through the transmission mechanism, thereby driving the expandable mesh 120 to rotate, so as to rotationally cut the thrombus 400.

[0049] The reciprocating mechanism includes a reciprocating wheel 222 and a stopper 223. The reciprocating wheel 222 is sleeved on the proximal end of the rotating tube 110. When the rotating tube 110 rotates, the reciprocating wheel 222 rotates synchronously with the rotating tube 110. The reciprocating wheel 222 is connected to the rotating tube 110 by welding, bonding or clamping. The reciprocating wheel 222 is a sleeve structure, and the outer peripheral surface of the reciprocating wheel 222 is provided with a guide groove 224, which is inclined relative to the cross section of the rotating tube 110. In this embodiment, the guide groove 224 is annular. Of course, the guide groove 224 can also be a spiral groove, or a V-shaped or W-shaped. The stopper 223 is a rod-shaped structure, and the first end of the stopper 223 is connected to the handle housing 210. In order to facilitate installation and disassembly, the first end of the stopper 223 and the handle housing 210 are connected in a detachable manner. Specifically, the first end of the stopper 223 and the handle housing 210 are connected by clamping, plugging or screws. The second end of the limiting member 223 is slidably matched with the guide groove 224. In order to reduce the resistance when the limiting member 223 and the guide groove 224 slide relative to each other, the end surface of the second end of the limiting member 223 is set to be a spherical surface.

[0050] In the embodiment of the utility model, the transmission mechanism includes a driving gear 225 and a driven gear 226. The driving gear 225 is connected to the driving shaft of the driving motor 221, and the driven gear 226 is sleeved on the proximal end of the rotating tube 110. The driven gear 226 is connected to the rotating tube 110 by welding, bonding or clamping, and the driving gear 225 is meshed with the driven gear 226. When the driving motor 221 drives the driving gear 225 to rotate, the driving gear 225 drives the rotating tube 110 to rotate through the driven gear 226, thereby driving the expandable net 120 to rotate. At the same time, since the second end of the stopper 223 is slidably matched with the guide groove 224, the rotating tube 110 reciprocates along the axial direction under the cooperation of the stopper 223 and the guide groove 224.

[0051] Furthermore, since the rotating tube 110 will also reciprocate axially during the rotation process, if the thickness of the driving gear 225 is equivalent to the thickness of the driven gear 226, the reciprocating motion of the rotating tube 110 will cause the driving gear 225 and the driven gear 226 to be misaligned axially. Therefore, in this embodiment, the thickness of the driven gear 226 is greater than the thickness of the driving gear 225. Specifically, the thickness of the driven gear 226 is 2 to 4 times the thickness of the driving gear 225.

[0052] It should be noted that the driving device may also use other rotary drive mechanisms besides the driving motor 221. The specific structural form of the transmission mechanism is not limited to the gear set, and may also use a combination of a belt and a pulley or a combination of a chain and a gear.

[0053] In an embodiment of the utility model, the driving assembly 220 includes a driving motor 221 and a linear reciprocating mechanism, the linear reciprocating mechanism is a screw assembly, the driving shaft of the driving motor 221 is connected to the proximal end of the rotating tube 110, the driving motor 221 is arranged on a slider of the screw assembly, when the driving motor 221 drives the rotating tube 110 to rotate, the motor of the screw assembly rotates, driving the slider to reciprocate along the axial direction of the rotating tube 110, the slider drives the driving motor 221 to reciprocate along the axial direction, and then drives the rotating tube 110 to reciprocate.

[0054] In the embodiment of the utility model, a through hole is provided at the proximal end of the handle housing 210 , the proximal end of the rotating tube 110 extends out of the handle housing 210 , and the proximal end of the rotating tube 110 is rotatably installed in the through hole via a bearing.

[0055] In the embodiment of the utility model, the traction assembly 130 includes a traction line 131 and a screw rod 132. A guide head is provided at the distal end of the expandable net 120. The guide head is a hemisphere, that is, the side of the guide head away from the expandable net 120 is a spherical surface, and the distal end of the traction line 131 is connected to the guide head. The distal end of the screw rod 132 is connected to the proximal end of the traction line 131. The proximal end of the screw rod 132 extends out of the proximal end of the rotating tube 110 and is threadedly matched with the holding member 133. The holding member 133 does not contact the proximal end of the handle housing 210. In this embodiment, the holding member 133 is a butterfly operating nut. During operation, by holding the holding member 133 and pulling or pushing the holding member 133 axially, the holding member 133 drives the expandable net 120 to deform through the screw rod 132 and the traction line 131, thereby changing the outer diameter of the expandable net 120.

[0056] In another embodiment of the present invention, Figure 2 The second schematic diagram of the side cross-sectional structure of the thrombus removal device provided by the embodiment of the utility model is illustrated. Figure 2 As shown, the traction assembly 130 includes a traction line 131, a guide head is provided at the distal end of the expandable net 120, and the distal end of the traction line 131 is connected to the guide head; a winding wheel 211 is provided at the proximal end of the handle housing 210, and the proximal end of the traction line 131 is wound around the winding wheel 211. When in use, by rotating the winding wheel 211, the winding wheel 211 can drive the expandable net 120 to deform through the traction line 131.

[0057] The thrombus breaking device of the utility model has a simple structure, is easy to operate, is easy to remove and break the thrombus, can achieve a good thrombus 400 clearing effect, and can be suitable for blood vessels 500 of different sizes.

[0058] like Figure 1As shown, the utility model also provides a thrombus removal device, including a suction catheter component 300 and a thrombus breaking device described in any one of the above embodiments, the suction catheter component 300 includes a suction catheter 310, a funnel-shaped tip 320 and a Luer connector 330, the suction catheter 310 is sleeved on the outer periphery of the distal end of the rotating tube 110, the suction catheter 310 and the rotating tube 110 are coaxially arranged, the funnel-shaped tip 320 is arranged at the distal end of the suction catheter 310 and is arranged around the outer periphery of the rotating tube 110, the front end of the rotating tube 110 extends to the distal end of the funnel-shaped tip 320, and the length of the suction catheter 310 is less than the distance between the expandable net 120 and the handle housing 210. The funnel-shaped tip 320 is used to intercept the broken thrombus 400 and provide guidance for the thrombus 400 to enter the suction cavity. A suction cavity is formed between the suction catheter 310 and the rotating tube 110 , and the Luer connector 330 is disposed at the proximal end of the suction catheter 310 , and the Luer connector 330 is communicated with the suction cavity.

[0059] The funnel-shaped tip 320 is provided to improve the suction effect of the broken thrombus 400, and at the same time, a large piece of thrombus 400 can be guided into the suction cavity. After the expandable net 120 breaks the thrombus 400 in the blood vessel 500, the broken thrombus 400 is sucked out of the body through the suction cavity in the suction catheter 310. The suction cavity is connected to the Luer connector 330 located outside the body, and negative pressure can be drawn into the cavity of the blood vessel 500 through the aspirator to ensure that the thrombus 400 is completely removed.

[0060] The thrombus removal device of the present invention can play the role of removing and crushing thrombi through the coordinated use of the suction catheter 310 and the thrombus crushing device. The proximal Luer connector 330 is used in conjunction with the suction catheter 310, and the two instruments, the rotary cutting component and the suction catheter 310, can be used independently. The suction cavity is connected to the Luer connector 330, and the thrombus 400 after the thrombus is crushed in the blood vessel 500 can be sucked more efficiently, quickly and conveniently. The suction effect is cleaner and more thorough, thereby effectively removing the thrombus 400.

[0061] The expandable net 120 of the thrombus removal device of the utility model has a controllable diameter and is compatible with more complex blood vessels 500, avoiding the need to replace the thrombus removal system midway due to the mismatch between the expandable net 120 and the blood vessel 500, shortening the operation time, and providing an efficient, safe, and non-invasive method for removing thrombi 400 from the blood vessel 500.

[0062] In an embodiment of the present utility model, Figure 3 The side view structure diagram of a funnel-shaped tip provided by the embodiment of the utility model is illustrated as follows: Figure 3As shown, the funnel-shaped tip 320 is composed of an opening portion 321, an expansion portion 322, and a thin neck portion 323 connected in sequence. The opening portion 321 is provided with an opening on the side facing the expandable net 120, and the thin neck portion 323 is connected to the distal end of the rotating tube 110. The cross-sectional areas of the opening portion 321, the expansion portion 322, and the thin neck portion 323 decrease in sequence. The cross-sectional area of ​​the expansion portion 322 decreases in the direction from the expandable net 120 to the handle housing 210 (i.e., Figure 2 The expansion portion 322 can guide the broken thrombus 400 entering the funnel-shaped tip 320, so that the thrombus 400 enters the narrow neck 323 and finally enters the suction cavity. By setting the cross-sectional area of ​​the opening 321 to the maximum, the interception efficiency of the funnel-shaped tip 320 on the thrombus 400 can be improved. The outer diameter of the narrow neck 323 is connected to the outer diameter of the suction catheter 310, and the provision of the narrow neck 323 can facilitate the connection of the funnel-shaped tip 320 with the distal end of the suction catheter 310.

[0063] The thrombus removal device of the present invention can effectively and thoroughly remove the thrombus 400 by cooperating with the suction catheter component 300 and the thrombus breaking device.

[0064] In an embodiment of the present utility model, Figure 4 The schematic diagram of the main structure of another funnel-shaped tip provided by the embodiment of the utility model is illustrated as follows Figure 4 As shown, the funnel-shaped tip 320 includes a mesh frame 325 and a film 324, the mesh frame 325 is connected to the distal end of the rotating tube 110, and the film 324 covers the mesh frame 325. The mesh frame 325 is made of a memory alloy, and the specific material of the mesh frame 325 is a superelastic nickel-titanium alloy. The mesh frame 325 can be formed into a funnel shape by weaving and welding memory alloy wires or laser engraving. Of course, it can also be formed by weaving or injection molding of a high-elastic polymer material.

[0065] In the embodiment of the present invention, the material of the film 324 is a polyamide or polyurethane thermoelastic material, the Shore hardness of the film 324 is 30HD-45HD, and the thickness of the film 324 is 0.05-0.15mm. The film is made of a polymer material such as PTFE, ePTFE, PU, ​​TPU and TPE and is coated on the mesh skeleton 325 through a surface coating process.

[0066] The material of the suction catheter 310 is a resin material such as nylon, polyurethane or PEBAX (block polyether amide). The suction catheter 310 can not only suction the thrombus 400, but also deliver thrombolytic drugs to assist in thrombus fragmentation and thrombolysis.

[0067] Figure 5The schematic diagram of the working principle of the thrombus removal device provided by the embodiment of the utility model for removing thrombus is illustrated. The method of using the thrombus removal device specifically includes the following steps:

[0068] According to the determined thrombus position, a delivery channel is established through the catheter sheath, and the suction catheter component 300 is inserted from the catheter sheath into the blood vessel 500.

[0069] The catheter sheath continues to move so that the funnel-shaped tip 320 is close to the thrombus 400, and the funnel-shaped tip 320 is compressed in the lumen of the catheter sheath and moves proximally through the catheter sheath, so that the mesh skeleton 325 on the funnel-shaped tip 320 expands and is in an expanded state. At this time, the funnel-shaped tip 320 is in a trumpet shape.

[0070] The thrombus breaking device is inserted into the blood vessel 500 . At this time, the expandable net 120 is in a compressed state. The expandable net 120 passes through the location of the thrombus 400 and is placed at the distal end of the thrombus 400 .

[0071] The suction device is locked and connected to the suction tube opening of the Luer connector 330, so that the suction device is connected to the suction tube opening to ensure reliable sealing of the connection part. When the expandable mesh 120 reaches the predetermined position, the screw rod 132 is pulled toward the proximal end for a certain distance, and the traction line 131 pulls the expandable mesh 120 to bend, so that the expandable mesh 120 is squeezed to form an enlarged rotary cutting part, and the expandable mesh 120 forms a conical ball structure, and the butterfly operating nut is rotated to fix the position of the screw rod 132, so that the diameter of the expandable mesh 120 is adapted to the inner diameter of the blood vessel 500.

[0072] When the thrombus is broken, the driving motor 221 is started to rotate the expandable net 120 and the rotating tube 110 and reciprocate along the axial direction, thereby breaking the thrombus 400 quickly and stably.

[0073] At the same time, the aspirator is turned on to aspirate the thrombus 400 in the blood vessel 500 that has been broken by the expandable net 120; after waiting for a certain period of time, the thrombus 400 in the blood vessel 500 is completely removed.

[0074] After the suction is completed, the butterfly operating nut is loosened and the screw rod 132 is pushed to move, so that the expandable net 120 returns to a compressed state, and the thrombus breaking device and the suction catheter component 300 are put into the catheter sheath and withdrawn from the human body along the lumen of the blood vessel 500.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A thrombus breaking device, characterized in that: include: The thrombus-breaking component comprises a rotating tube, an expandable net and a traction assembly, wherein the expandable net is arranged at the distal end of the rotating tube, the traction assembly is arranged in the rotating tube, the distal end of the traction assembly is connected to the expandable net, and the traction assembly is used to drive the expandable net to open and close; The control handle component includes a handle shell and a drive assembly. The proximal end of the rotating tube is rotatably connected to the handle shell. The drive assembly is arranged in the handle shell and connected to the rotating tube. The drive assembly is used to drive the rotating tube to rotate axially and drive the rotating tube to reciprocate axially.

2. The thrombus fragmentation device according to claim 1, characterized in that: The drive assembly comprises: Drive motor; A transmission mechanism connected to the drive shaft of the drive motor and the proximal end of the rotating tube, wherein the drive motor is used to drive the rotating tube to rotate axially through the transmission mechanism; The reciprocating mechanism includes a reciprocating wheel and a limiting member. The reciprocating wheel is sleeved on the proximal end of the rotating tube. A guide groove is provided on the outer peripheral surface of the reciprocating wheel. The guide groove is inclined relative to the cross-section of the rotating tube. The first end of the limiting member is connected to the handle housing, and the second end of the limiting member is slidably matched with the guide groove.

3. The thrombus breaking device according to claim 2, characterized in that: The transmission mechanism comprises: A driving gear connected to a driving shaft of the driving motor; The driven gear is sleeved on the proximal end of the rotating tube, and the driving gear is meshed with the driven gear.

4. The thrombus breaking device according to any one of claims 1 to 3, characterized in that: The traction assembly comprises: A traction line, wherein a guide head is provided at the distal end of the expandable net, and the distal end of the traction line is connected to the guide head; A screw rod, the distal end of which is connected to the proximal end of the traction line, the proximal end of which extends out of the proximal end of the rotating tube and is threadedly matched with the holding piece.

5. The thrombus breaking device according to any one of claims 1 to 3, characterized in that: The traction assembly comprises: A traction line, a guide head is arranged at the distal end of the expandable net, and the distal end of the traction line is connected to the guide head; a winding wheel is arranged at the proximal end of the handle shell, and the proximal end of the traction line is wound around the winding wheel.

6. The thrombus breaking device according to any one of claims 1 to 3, characterized in that: The material of the expandable net is elastic memory material or expandable polymer fiber.

7. A thrombus removal device, characterized in that: It comprises a suction catheter component and the thrombus fragmentation device according to any one of claims 1 to 6, wherein the suction catheter component comprises a suction catheter, a funnel-shaped tip and a Luer connector, the suction catheter is sleeved on the outer periphery of the distal end of the rotating tube, the funnel-shaped tip is arranged at the distal end of the suction catheter and surrounds the outer periphery of the rotating tube; a suction cavity is formed between the suction catheter and the rotating tube, the Luer connector is arranged at the proximal end of the suction catheter and communicated with the suction cavity.

8. The thrombus removal device according to claim 7, characterized in that: The funnel-shaped tip is composed of an opening portion, an expansion portion and a thin neck portion which are connected in sequence, the opening portion is provided with an opening on a side facing the expandable net, the thin neck portion is connected to the distal end of the rotating tube, and the cross-sectional areas of the opening portion, the expansion portion and the thin neck portion decrease in sequence.

9. The thrombus removal device according to claim 7, characterized in that: The funnel-shaped tip comprises: A mesh skeleton connected to the distal end of the rotating tube; The film covers the mesh frame.

10. The thrombus removal device according to claim 9, characterized in that: The film is made of polyamide or polyurethane thermoelastic material, the Shore hardness of the film is 30HD-45HD, and the thickness of the film is 0.05-0.15mm; the mesh skeleton is made of memory alloy.

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