Interventional department thrombus removing device

Abstract

The utility model discloses an intervention department is with thrombus removing device belongs to thrombus removing device technical field, intervention department is with thrombus removing device, include: wire and sleeve, the sleeve is slidably sleeved in the outside of wire, the surface fixed mounting of wire has fixed ring, remove mechanism, be used for removing and collecting the remove mechanism of thrombus and set up in the outside of wire, wherein, the remove mechanism includes the drive pipe of sleeveing in the outside of wire, the inside of drive pipe is provided with the screw component. Through above -mentioned mode, through wire, sleeve and drive pipe are guided into target blood vessel area, fixed ring realizes axial location to remove mechanism, sleeve connects and draws system, screw component and guide component cooperate and complete the rotary cutting operation at thrombus part, and the cutting structure in the drive pipe is smashed to thrombus, and the fragment is inhaled through the drive pipe, and is guided out in time through the sleeve, prevents the broken bolt and enters the distal blood vessel.

Description

Technical Field

[0001] This utility model relates to the technical field of thrombus removal devices, specifically to a thrombus removal device for interventional procedures. Background Technology

[0002] A thrombus is a blood clot that forms during the clotting process, usually within a blood vessel. It's a natural mechanism to prevent excessive bleeding, but in some cases, it can block blood vessels, causing serious health problems. Treatments for thrombi include anticoagulation therapy, thrombolysis, and thrombectomy. These treatments aim to stop the thrombus from growing, restore blood flow, and prevent its reformation. A thrombectomy device is used in vascular interventional procedures to remove thrombi from blood vessels. It typically consists of a catheter, a suction device, a guidewire, and specialized suction instruments. The device works by introducing the instrument into the blood vessel through the catheter, drawing the thrombus into the suction device, thus restoring patency of the blood vessel.

[0003] As shown in the reference case "A Vascular Intervention Thrombus Aspiration Device" (publication number CN221579105U), the device's ability to prevent fragmented thrombi from flowing with the blood to other areas and causing risks is enhanced by the coordinated arrangement of the aspiration component, the removal component, and the anti-escape component. Furthermore, the device's use of a second catheter and the coordination between the filling port and the balloon allows for the introduction of an appropriate amount of filling material through the second catheter to inflate the balloon, temporarily slowing the blood flow and blocking thrombus fragments to prevent them from flowing to other areas, thus effectively improving the device's practicality.

[0004] Existing thrombus aspiration structures often suffer from insufficient removal efficiency when dealing with stubborn and highly adhesive thrombi. When negative pressure aspiration fails to remove the thrombus completely, it can easily be pulled and detached, causing damage to the inner wall of the blood vessel, leading to intimal injury or even bleeding, which seriously affects vascular safety.

[0005] Based on this, the present invention designs a thrombus removal device for interventional procedures to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a thrombus removal device for interventional procedures.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An interventional thrombus removal device includes: a lead wire and a cannula, the cannula being slidably sleeved on the outside of the lead wire, and a fixing ring being fixedly installed on the surface of the lead wire; a removal mechanism for removing and collecting thrombi, the removal mechanism being disposed on the outside of the lead wire; wherein, the removal mechanism includes a drive tube sleeved on the outside of the lead wire, a rotating component being disposed on the inner side of the drive tube, and a guide component being disposed on one side of the rotating component.

[0009] Furthermore, the rotating assembly includes a flexible drive shaft rotatably mounted on the outside of the lead wire. A cutting blade is fixedly mounted on the outside of the flexible drive shaft. The cutting blade is located inside the drive tube. The flexible drive shaft rotates around its own axis, driving the cutting blade to rotate, thereby forming a rotary cutting force field at the front end of the drive tube, achieving effective cutting and disturbance of the target thrombus.

[0010] Furthermore, the cutting blade is configured in a spiral shape, and the drive tube is rotatably mounted on one end of the sleeve. The spiral structure of the cutting blade not only has cutting ability during rotation, but also generates a guiding effect, so that the thrombus is guided into the cavity of the drive tube during the cutting process, thereby enhancing the guidance of thrombus removal.

[0011] Furthermore, the drive tube has inlet ports on both sides, and the two inlet ports are aligned with each other. By symmetrically opening inlet ports on both sides of the drive tube 310, the coverage and collection efficiency of thrombus fragment collection are improved.

[0012] Furthermore, the inlet is designed as a strip shape, and the outer edge of the inlet is designed as a bevel. By designing the inlet as a strip structure and setting a guide bevel on the outside, the area of ​​the thrombus fragment aspiration port is significantly increased.

[0013] Furthermore, the guiding assembly includes a guide cap fixedly installed at the other end of the drive tube. The surface of the guide cap has multiple incisions, which allow thrombus fragments to be guided into the drive tube for collection during the coordinated cutting process of the guide cap and the cutting blade when the device is close to or attached to the thrombus.

[0014] Furthermore, multiple incision sites are connected to the inside of the drive tube. The incision sites are arranged around the outside of the wire and are designed in the shape of a water droplet. The incision sites are designed in the shape of water droplets and are distributed around the wire. This not only increases the thrombus introduction area, but also creates a flow rate enhancement effect through the wide tail section, thereby improving the negative pressure inhalation efficiency.

[0015] Furthermore, the guide cap is designed to be hemispherical, and a micro-vibrating ring is fixedly installed on one side of the guide cap. The micro-vibrating ring loosens the thrombus through high-frequency vibration, assists in the peeling of wall-attached thrombi, reduces the shearing resistance, and improves the clearance efficiency.

[0016] Beneficial effects

[0017] 1. The cannula and drive tube are introduced into the target blood vessel area through the guide wire. The fixing ring provides axial limit for the removal mechanism. The cannula is connected to the extraction system. The rotating component and the guiding component work together to complete the rotary cutting operation at the thrombus site. The cutting structure inside the drive tube crushes the thrombus. The fragments are sucked in through the drive tube and promptly discharged through the cannula to prevent the fragments from entering the distal blood vessel.

[0018] 2. By setting multiple incision points in a teardrop shape and distributing them around the perimeter, not only is the thrombus introduction area expanded, but the wide tail segment also creates a flow rate enhancement effect, improving the negative pressure aspiration efficiency and effectively reducing thrombus fragment residue or accumulation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the main structure of a thrombus removal device for interventional procedures according to this utility model;

[0021] Figure 2 This is a schematic diagram of the cleaning mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the drive tube and guide cap structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the micro-vibrating ring and guide cap structure of this utility model.

[0024] The labels in the diagram represent:

[0025] 100. Wire; 110. Sleeve; 200. Fixing ring; 300. Clearing mechanism; 310. Drive tube; 320. Rotating assembly; 321. Flexible drive shaft; 322. Cutting disc; 323. Inlet / outlet; 330. Guide assembly; 331. Guide cap; 332. Cutting entrance; 333. Miniature vibrating ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] The present invention will be further described below with reference to the embodiments.

[0028] In some embodiments, please refer to the appendix to the instruction manual. Figure 1-4 An interventional thrombus removal device includes: a lead wire 100 and a sheath 110, the sheath 110 being slidably sleeved on the outside of the lead wire 100, and a fixing ring 200 being fixedly installed on the surface of the lead wire 100; a removal mechanism 300, which is disposed on the outside of the lead wire 100 for removing and collecting thrombi; wherein, the removal mechanism 300 includes a drive tube 310 sleeved on the outside of the lead wire 100, a rotating component 320 being disposed on the inner side of the drive tube 310, and a guide component 330 being disposed on one side of the rotating component 320.

[0029] In this embodiment, the cannula 110 and the drive tube 310 are guided to the target blood vessel area through the guide wire 100. The fixing ring 200 can limit and position the axial position of the removal mechanism 300 on the guide wire 100 to prevent displacement. The cannula 110 is connected to an extraction system. The rotating component 320 and the guiding component 330 perform a rotating cutting action at the thrombus site. At the same time, the thrombus is crushed by the cutting structure inside the drive tube 310. The cut thrombus fragments can be directly sucked into the drive tube 310 and promptly exported through the extraction system connected to the cannula 110 to prevent the fragments from falling off and entering the distal blood vessel.

[0030] It should be noted that the existing thrombus removal device mainly includes the catheter body, guidewire, aspiration pathway, aspiration device, and some supporting auxiliary structures, such as the rotating component 320 and the guiding component 330. These are all functional enhancement components installed on the outside of the lead wire 100 and the drive tube 310. They do not change the original internal pathway structure of the catheter, do not affect the negative pressure transmission path, and do not hinder the forward movement and guidance of the lead wire 100 in the catheter.

[0031] The extraction system includes structural components such as a negative pressure pump, a liquid storage chamber, and connecting catheters. These are existing and mature components. The negative pressure can create suction inside the drive tube 310 and the sleeve 110 to promptly remove the cut thrombus fragments from the body and prevent residual thrombi from entering downstream blood vessels and causing secondary blockage. Its negative pressure interface is located outside the device.

[0032] The main body of the fixing ring 200 includes an elastic skeleton made of metal wire material with shape memory function or good elasticity. The elastic skeleton has a ring-shaped winding structure. Under normal conditions, it is in a compressed and contracted state. After release, it can automatically return to the preset ring structure in the blood vessel or catheter channel. It is an existing mature component and realizes the axial limiting and positioning of the clearance mechanism 300.

[0033] like Figure 2 and Figure 3 As shown, the rotating assembly 320 includes a flexible drive shaft 321 rotatably mounted on the outside of the wire 100. A cutting blade 322 is fixedly mounted on the outside of the flexible drive shaft 321, and the cutting blade 322 is located inside the drive tube 310.

[0034] In this embodiment, during use, one end of the flexible drive shaft 321 is connected to a drive motor or knob at the rear of the device for driving, while the other end is fixedly connected to the cutting blade 322 and the drive tube 310. The flexible drive shaft 321 rotates around its own axis, causing the cutting blade 322 to rotate, thereby forming a rotary cutting force field at the front end of the drive tube 310, achieving effective cutting and disturbance of the target thrombus.

[0035] The flexible drive shaft 321 is an existing mature structural component, including a torque transmission layer, an inner shaft core or liner, and an inner shaft core or liner. It is widely used in endoscopic surgical instruments, interventional catheter instruments, powered bone drills and other fields. It has good torsional stiffness and compliance performance and can be hollow, which can maintain efficient rotational transmission capability in curved paths.

[0036] The cutting blade 322 is set in a spiral shape, and the drive tube 310 is rotatably mounted on one end of the sleeve 110.

[0037] In this embodiment, since the cutting blade 322 is set as a spiral structure, it not only has cutting ability during rotation, but also generates a guiding effect, so that the thrombus is guided into the cavity of the drive tube 310 during the cutting process, further enhancing the guidance of thrombus removal.

[0038] The drive tube 310 has inlet ports 323 on both sides, and the two inlet ports 323 are aligned with each other.

[0039] In this embodiment, by symmetrically opening inlet ports 323 on both sides of the drive tube 310, the coverage and collection efficiency of thrombus fragment collection are improved. Combined with the spiral cutting guide effect of the spiral cutting blade 322, the fragments can be quickly sucked into the interior.

[0040] The inlet 323 is designed as a strip shape, and the outer edge of the inlet 323 is designed as a bevel.

[0041] In this embodiment, by designing the inlet 323 as a strip structure and setting a guide slope on the outside, the area of ​​the thrombus fragment aspiration inlet is significantly increased, the fragment guidance path is optimized, and the synergistic clearance efficiency of rotary cutting and negative pressure suction is improved.

[0042] like Figure 2 and Figure 4 As shown, the guide assembly 330 includes a guide cap 331 fixedly installed at the other end of the drive tube 310, and the surface of the guide cap 331 has a plurality of incisions 332.

[0043] In this embodiment, the guide cap 331 serves as the front-end structure when the device enters the blood vessel, which can reduce frictional resistance during the advancement process and avoid mechanical damage to the vascular endothelium caused by the front-end structure. The incision 332 allows thrombus fragments to be guided into the drive tube 310 for collection during the coordinated rotary cutting process of the guide cap 331 and the cutting blade 322 when the device is close to or attached to the thrombus.

[0044] Multiple inlets 332 are connected to the inside of the drive tube 310. The inlets 332 are arranged around the outside of the wire 100 and are designed in the shape of a teardrop.

[0045] In this embodiment, by setting multiple incision points 332 in a teardrop shape and distributing them around the perimeter, not only is the thrombus introduction area expanded, but the wide tail segment also creates a flow rate enhancement effect, improving the negative pressure aspiration efficiency and effectively reducing thrombus fragment residue or accumulation.

[0046] The guide cap 331 is set in a hemispherical shape, and a miniature vibrating ring 333 is fixedly installed on one side of the guide cap 331.

[0047] In this embodiment, by setting the guide cap 331 as a hemispherical structure, the compliance and fit of the clearing device when entering the blood vessel are improved. The micro-vibrating ring 333 loosens the thrombus through high-frequency vibration, assists in peeling off the wall-attached thrombus, reduces the rotational shearing resistance, and improves the clearing efficiency.

[0048] The miniature vibrating ring 333 is an existing mature component, including a vibration drive and a vibration housing. Vibration output can be achieved through piezoelectric ceramic vibrators, electromagnetic exciters, or miniature eccentric motors. It features small size, controllable amplitude, and low power consumption, and is suitable for use at the front end of interventional surgical instruments.

[0049] Working principle: The cannula 110 and the drive tube 310 are introduced into the target blood vessel area through the wire 100. The guide cap 331 is located at the front end of the device and adopts a hemispherical structure, which can improve the compliance of the introduction and avoid scratching the blood vessel. The micro-vibration ring 333 can generate high-frequency vibration before approaching the thrombus area, effectively loosening the thrombus attached to the wall and providing conditions for subsequent removal. The fixing ring 200 automatically unfolds after release, limiting the axial position of the removal mechanism 300 and preventing displacement during operation.

[0050] When the guide component 330 comes close to the thrombus, the external drive device drives the flexible transmission shaft 321 to rotate, which in turn drives the spiral cutting blade 322 and the drive tube 310 to rotate. During the spiral cutting process, the thrombus is broken up and guided into the drive tube 310 under the spiral guiding effect. The drive tube 310 has strip-shaped inlet ports 323 on both sides with beveled edges, which can efficiently guide thrombus fragments into the tube. Multiple inlet ports 323 and teardrop-shaped inlet ports 332 on the guide cap 331 are connected to the inside of the drive tube 310 to form a multi-directional introduction structure, realizing the rapid absorption of fragments under the action of rotation and negative pressure.

[0051] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A thrombus removal device for interventional procedures, characterized in that, include: A conductor (100) and a sleeve (110), wherein the sleeve (110) is slidably sleeved on the outside of the conductor (100), and a fixing ring (200) is fixedly installed on the surface of the conductor (100). A removal mechanism (300) for removing and collecting thrombi is disposed on the outside of the guide wire (100); The cleaning mechanism (300) includes a drive tube (310) sleeved on the outside of the wire (100), a rotating component (320) is provided on the inside of the drive tube (310), and a guide component (330) is provided on one side of the rotating component (320).

2. The interventional thrombus removal device according to claim 1, characterized in that, The rotating assembly (320) includes a flexible drive shaft (321) rotatably mounted on the outside of the conductor (100), and a cutting blade (322) is fixedly mounted on the outside of the flexible drive shaft (321), the cutting blade (322) being located inside the drive tube (310).

3. The interventional thrombus removal device according to claim 2, characterized in that, The cutting blade (322) is set in a spiral shape, and the drive tube (310) is rotatably installed at one end of the sleeve (110).

4. The interventional thrombus removal device according to claim 1, characterized in that, The drive tube (310) has inlet ports (323) on both sides, and the two inlet ports (323) are aligned with each other.

5. The interventional thrombus removal device according to claim 4, characterized in that, The inlet (323) is configured as a strip shape, and the outer edge of the inlet (323) is configured as a bevel.

6. The interventional thrombus removal device according to claim 1, characterized in that, The guide assembly (330) includes a guide cap (331) fixedly installed at the other end of the drive tube (310), and the surface of the guide cap (331) has a plurality of incisions (332).

7. The interventional thrombus removal device according to claim 6, characterized in that, The multiple incisions (332) are all connected to the inside of the drive tube (310). The incisions (332) are arranged around the outside of the wire (100) and are designed in the shape of a water droplet.

8. The interventional thrombus removal device according to claim 6, characterized in that, The guide cap (331) is configured as a hemispherical shape, and a miniature vibrating ring (333) is fixedly installed on one side of the guide cap (331).

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