Thrombus aspiration device

Abstract

The invention belongs to the technical field of medical auxiliary instruments, and provides a thrombus aspiration device. The device comprises a drainage set sleeve and a suction body. The drainage set sleeve comprises a drainage guide pipe, a supporting side pipe and a negative pressure suction part. An abutting notch groove is formed in the far end of the drainage guide pipe; the supporting side tube is fixedly arranged on one side of the drainage guide tube and close to the far-end tube head, and the supporting side tube is located on the other side, oppositely abutting against the notch groove, of the drainage guide tube. The negative pressure suction part is mounted at the near end of the drainage guide tube; the suction body is installed in the drainage set sleeve and located in the drainage guide pipe, and the suction body comprises an installation sleeve, a drawing assembly and a micro linear motor. A drainage main sleeve of a double-cavity structure is adopted, a drainage guide pipe serves as a traditional thrombus treatment and cleaning pipe cavity, and a supporting side pipe on the other side serves as a supporting design for expanding a blood vessel wall cavity; in this way, in the thrombus treatment and suction process, the operation space is increased.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary equipment technology, specifically to a thrombus aspiration device. Background Technology

[0002] Thrombus aspiration is a key interventional technique for treating endovascular thrombotic lesions, restoring blood flow through negative pressure suction using a catheter. Currently, the mainstream clinical equipment uses a single-lumen catheter, which creates an extremely confined operating space when the thrombus completely or subtotally obstructs the vessel. Within this limited space, the catheter or its attached instruments (such as guidewires and rotational atherectomy devices) are prone to scraping and colliding with the vascular intima; simultaneously, high-speed thrombus fragments during aspiration may also impact the vessel wall. These mechanical injuries can easily lead to intimal damage and perforation, causing serious complications such as massive intraoperative and postoperative bleeding and vascular dissection, endangering patient safety.

[0003] Existing improvements are mostly focused on local optimizations such as the shape and material of the catheter tip. While these can reduce damage to some extent, they fail to fundamentally change the operating environment in which "instruments, thrombi, and blood vessel walls" interact directly in a confined space, and the operational risks remain significant.

[0004] Therefore, we propose a novel device that can fundamentally expand the operating space and effectively isolate the blood vessel wall to eliminate the risk of massive bleeding caused by instrument contact or fragment impact during thrombus treatment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a thrombus aspiration device that increases the operating space and eliminates the risk of massive bleeding caused by instrument contact or fragment impact during thrombus treatment.

[0006] The present invention provides a thrombus aspiration device, comprising: A drainage assembly includes a drainage guide tube, a support side tube, and a negative pressure suction device. The distal end of the drainage guide tube has an abutment notch. The support side tube is fixed to one side of the drainage guide tube, near the distal end, and is located on the opposite side of the drainage guide tube opposite the abutment notch. The negative pressure suction device is installed at the proximal end of the drainage guide tube. The suction body is installed within the drainage assembly and located within the drainage guide tube. The suction body includes an mounting sleeve, a pull assembly, and a miniature linear motor. The miniature linear motor is installed within the mounting sleeve, with its rotating shaft extending outwards. The mounting sleeve is installed on one side of the inner wall of the drainage guide tube, near the abutment notch. The pull assembly is installed on the rotating shaft of the miniature linear motor. The abutment notch abuts against the thrombus, the suction body contacts the thrombus, breaks it up, and removes the thrombus through a negative pressure suction device.

[0007] Furthermore, the supporting side tube is made of metal elastic mesh. In practical applications, the purpose of this design is to facilitate support, make the support effect adjustable, and thus further improve the operating space.

[0008] Furthermore, the pull-out assembly includes a spline shaft, a spline sleeve, and a fixing plate. The fixing plate is fixedly connected to the inner wall of the mounting sleeve. The spline sleeve is rotatably mounted on the fixing plate. The mover of the micro linear motor is rotatably connected to one end of the spline shaft, and the shaft of the spline shaft passes through the spline sleeve.

[0009] Furthermore, the suction body includes a thrombus retractor, one end of which is fixedly connected to the other end of the splined shaft; two thrombus retractors are provided, arranged opposite each other, and of different lengths. In practical applications, the purpose of this design is to realize the linear reciprocating motion and rotational motion of the thrombus retractor, thereby achieving the insertion and withdrawal of the thrombus; through repeated repetition, the thrombus can be effectively torn and broken up, thus achieving removal.

[0010] Furthermore, the suction body also includes a rotary coupling, which comprises a fixed disk and a rotating disk. One side of the rotating disk is rotatably mounted inside the cavity of the fixed disk. The fixed disk is fixedly connected to the mover of the micro linear motor, and the other side of the rotating disk is fixedly connected to one end of the splined shaft. In practical applications, the purpose of this design is to ensure the rotational effect of the thrombus retractor.

[0011] Furthermore, the aspiration body also includes a movable guide support sleeve, which is disposed inside the drainage guide tube and abuts against the inner wall of the drainage guide tube; the movable guide support sleeve is located near the abutment notch and in the opposite direction to the mounting sleeve; and the movable guide support sleeve is made of metal elastic mesh. In practical applications, the purpose of this design is to open the channel, facilitate aspiration, achieve negative pressure delivery, and thus facilitate pressure flow. When this area is enlarged, it prevents debris generated during thrombus removal from being pushed into the tube, and by expanding this area, it facilitates the suction of debris.

[0012] Furthermore, the negative pressure suction device includes a suction pump and a drainage bag; the inlet end of the suction pump is connected to the drainage guide tube, and the outlet end of the suction pump is connected to the drainage bag. In practical applications, the purpose of this design is to utilize the pumping capacity of the suction pump to further enhance the suction of debris generated during the thrombus removal process, facilitating its entry into the drainage bag.

[0013] As can be seen from the above technical solution, the beneficial effects of the thrombus aspiration device provided by the present invention are as follows: This invention employs a dual-lumen drainage main sleeve, in which the drainage guide tube serves as the traditional lumen for thrombus treatment and cleaning, while the supporting tube on the other side serves as a support design to expand the vessel wall lumen. In this way, the operating space is increased during thrombus treatment and aspiration, avoiding various problems caused by operating in a confined space.

[0014] This invention achieves precise positioning by setting an abutment notch groove that abuts against the thrombus. On the one hand, it covers most of the thrombus, avoiding damage to the blood vessel wall during the operation. On the other hand, it also achieves a fixed and stable positioning effect for the entire drainage kit, thus facilitating subsequent treatment of the thrombus.

[0015] This invention, by setting the suction body so that it is located within the abutment notch groove, reduces the exposed space of the suction body compared to the traditional installation position at the tube opening. This completely avoids vascular abrasion during thrombus treatment and greatly reduces the occurrence of massive bleeding. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a front view of a thrombus aspiration device provided in an embodiment of the present invention; Figure 2 for Figure 1 The AA cross-sectional schematic diagram shown is a schematic diagram of the support side tube of the expansion support; Figure 3 This is a schematic diagram of the structure of the suction body and the contracting support side tube in the drainage guide tube of the present invention; Figure 4 for Figure 1 The enlarged structural diagram at point B is shown below; Figure label: Drainage assembly 100, suction body 200, drainage guide tube 110, support side tube 120, negative pressure suction component 130, abutment notch groove 111, suction pump 131, drainage bag 132, mounting sleeve 210, miniature linear motor 220, pull-out assembly 230, thrombus hook 240, rotary coupling 250, moving guide support sleeve 260, spline shaft 231, spline sleeve 232, fixing plate 233, fixing disc 251, rotating disc 252. Detailed Implementation

[0018] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0019] The basic implementation examples are as follows: Figures 1 to 4 As shown: like Figures 1 to 4 As shown, this embodiment provides a thrombus aspiration device, which aims to improve the operating space within blood vessels and effectively avoid the risk of massive bleeding caused by improper contact between the instrument and the blood vessel wall or the impact of thrombus fragments on the blood vessel wall during thrombus treatment.

[0020] The thrombus aspiration device mainly consists of two parts: a drainage assembly 100 and an aspiration body 200.

[0021] I. Regarding the lead generation package 100 The drainage assembly 100 constitutes the main conveying and drainage channel of the device, which includes a drainage guide pipe 110, a support side pipe 120, and a negative pressure suction component 130.

[0022] The drainage guide tube 110 is a flexible tube with a central cavity, and its wall has an abutment notch 111 near the end inserted into the human body. The abutment notch 111 is essentially a window or groove on one side of the tube wall, and its shape and size are designed to fit and abut against the inner wall area of ​​the blood vessel where the target thrombus is located, so that the thrombus can be partially contained or exposed in the area corresponding to the notch 111 during operation.

[0023] The support side tube 120 is fixedly disposed on one side of the drainage guide tube 110 and extends radially along the drainage guide tube 110. The distal end of the support side tube 120 is close to the distal end of the drainage guide tube 110, and the support side tube 120 is on the other side of the drainage guide tube 110 opposite to the abutment notch 111. In this embodiment, the support side tube 120 is preferably made of a metal elastic mesh. This material gives the support side tube 120 good flexibility when not expanded, which is conducive to delivery. When support is required, the internal metal mesh structure can be expanded by means of internal guide wires or pressure, thereby moderately pushing the blood vessel wall outward and expanding the local operating space around the abutment notch 111. This adjustable support effect is one of the keys to the safe and effective operation of this device.

[0024] The negative pressure suction device 130 is installed at the proximal end of the drainage guide tube 110, i.e., the end that remains outside the body. Specifically, the negative pressure suction device 130 includes a suction pump 131 and a drainage bag 132. The inlet end of the suction pump 131 is connected to the proximal port of the drainage guide tube 110 via a connecting tube, and the outlet end of the suction pump 131 is connected to the drainage bag 132. In use, by activating the suction pump 131, a continuous negative pressure suction force can be established in the central cavity of the drainage guide tube 110 for aspirating thrombus fragments and blood.

[0025] II. Regarding the suction body 200 The aspiration body 200 is the core component for performing the functions of thrombus grabbing and fragmentation. It is installed inside the drainage assembly 100, specifically in the central cavity of the drainage guide tube 110. The aspiration body 200 includes an installation sleeve 210, a miniature linear motor 220, a pull assembly 230, a thrombus hook 240, a rotary coupling 250, and a movable guide support sleeve 260.

[0026] The mounting sleeve 210 is a cylindrical structure that is fixedly installed on the inner wall of the drainage guide tube 110, and the installation position is close to the side where the abutment notch 111 is located, so that the opening direction of the mounting sleeve 210 is roughly aligned with the notch 111.

[0027] The miniature linear motor 220 is fixedly installed in the inner cavity of the mounting sleeve 210. The mover of the miniature linear motor 220, i.e., the output shaft, is capable of reciprocating linear motion along its axial direction. The end of the mover of the miniature linear motor 220 extends outward, i.e., toward the abutment notch 111.

[0028] The pull-out assembly 230 is used to convert the linear output of the micro linear motor 220 into a specific form of mechanical motion. It includes a splined shaft 231, a splined sleeve 232, and a fixing plate 233. The fixing plate 233 is fixedly connected to the inner wall or frame of the mounting sleeve 210. The splined sleeve 232 is rotatably mounted on the fixing plate 233, with its axis aligned with the direction of motion of the mover of the micro linear motor 220. One end of the splined shaft 231 is connected to the mover of the micro linear motor 220 via a rotary coupling 250, and the shaft of the splined shaft 231 passes through the splined sleeve 232. Because the splined shaft 231 and the splined sleeve 232 are splined together, the splined shaft 231 can both reciprocate linearly along the axial direction under the constraint of the splined sleeve 232 and rotate freely around its own axis.

[0029] A rotary coupling 250 connects the mover of the miniature linear motor 220 to the splined shaft 231, transmitting linear motion while allowing the splined shaft 231 to rotate relative to it. The rotary coupling 250 includes a fixed disk 251 and a rotating disk 252. The fixed disk 251 is fixedly connected to the mover of the miniature linear motor 220 and has an internal cavity. One side of the rotating disk 252 is rotatably mounted in the cavity of the fixed disk 251 via bearings or other rotating components, while the other side is fixedly connected to one end of the splined shaft 231. This design ensures that when the mover of the miniature linear motor 220 performs linear motion, it can drive the splined shaft 231 to synchronously perform linear reciprocating motion via the rotary coupling 250. Simultaneously, the splined shaft 231 and its connected component, the thrombus hook 240, can rotate freely under resistance or active drive, without being constrained by the miniature linear motor 220.

[0030] The thrombus retractor 240 is a component that directly acts on the thrombus. In this embodiment, there are two thrombus retractors 240, specifically two hook-shaped or claw-shaped components. One end of each is fixedly connected to the other end of the spline shaft 231, that is, the end away from the micro linear motor 220, and extends outward. The two thrombus retractors 240 are arranged opposite each other, and their lengths are designed to be different. The longer retractor can penetrate deeper into the thrombus, while the shorter retractor acts on the surface of the thrombus or at different angles. This differentiated design helps to more effectively penetrate, tear, and break up the thrombus.

[0031] The movable guide support sleeve 260 is fitted over the pull-out assembly 230 and the thrombus hook 240, located within the central cavity of the drainage guide tube 110. The proximal end of the movable guide support sleeve 260 maintains a certain distance from the mounting sleeve 210, while the distal end is close to or slightly beyond the abutment notch 111. A gap is left between the inner wall of the movable guide support sleeve 260 and moving parts such as the spline shaft 231 and the thrombus hook 240 to allow for their movement, while its outer wall can slide or fit tightly against the inner wall of the drainage guide tube 110. Importantly, the movable guide support sleeve 260 is also preferably made of metal elastic mesh. After the device reaches the target position, it can expand radially through the external guide wire or the metal mesh structure at the distal end of the air pressure. This can form a relatively open "chamber" inside the drainage guide tube 110 and behind the notch groove 111, avoiding the accumulation and blockage of thrombus fragments in the lumen and facilitating negative pressure suction. On the other hand, the expanded movable guide support sleeve 260 can better fit with the inner wall of the drainage guide tube 110, guide the negative pressure flow field, and make the suction force more concentrated in the thrombus area, thereby improving the suction efficiency.

[0032] III. Work Process The following is a brief description of the working process of the thrombus aspiration device in this embodiment: 1. Delivery and Positioning: Under the guidance of the guidewire, the distal end of the device (including the drainage guide tube 110, the support side tube 120 in a contracted state, and the aspiration body 200) is delivered to the vicinity of the thrombus in the target blood vessel; then the position of the device is adjusted so that the abutment notch 111 on the drainage guide tube 110 accurately abuts against the blood vessel wall segment containing the thrombus. At this time, part of the thrombus will be exposed at the abutment notch 111.

[0033] 2. Establishing an operating space: Manipulate the support tube 120 to expand its own metal elastic mesh, gently pushing the blood vessel wall outward, thereby creating an enlarged local operating space in the thrombus concentration area.

[0034] 3. Expand the internal channel: expand the metal mesh portion at the distal end of the movable guide support sleeve 260 to form a buffer and convergence chamber inside the drainage guide tube 110 near the operating area.

[0035] 4. Thrombus fragmentation and aspiration: The micro linear motor 220 and the negative pressure suction device 130 are activated. The micro linear motor 220 drives its mover to perform reciprocating linear motion, which in turn drives the spline shaft 231 and the thrombus hook 240 connected to its end to perform synchronous linear reciprocating motion through the rotary coupling 250. During this process, the reciprocating thrombus hook 240 pierces the thrombus at the notch groove 111 and is pulled out. Since the spline shaft 231 can rotate freely, the thrombus hook 240 may also rotate during the piercing and pulling process, thereby more effectively tearing and fragmenting the thrombus.

[0036] 5. Continuous removal: While the thrombus is mechanically broken up, the negative pressure established in the drainage guide tube 110 by the continuously running suction pump 131 draws the thrombus fragments, along with a small amount of blood, through the channels inside and around the movable guide support sleeve 260 and finally drains them into the drainage bag 132. The chamber formed by the expansion of the movable guide support sleeve 260 helps prevent large fragments from blocking the lumen and ensures smooth suction.

[0037] 6. Completion and Withdrawal: Once the target thrombus has been cleared, stop the miniature linear motor 220. Return the support tube 120 and the movable guide support sleeve 260 to their contracted state, and the entire device can be safely withdrawn from the blood vessel.

[0038] The thrombus aspiration device in this embodiment creates a controllable and relatively spacious intravascular operating space by setting a drainage guide tube 110 with an abutment notch 111 and an expandable support side tube 120. The main activity area of ​​the aspiration body 200, which includes a micro linear motor 220 and a thrombus hook 240, is limited to the vicinity of the abutment notch 111, which greatly reduces the large-scale movement of the instrument in the blood vessel and restricts the thrombus treatment process mainly within the area "framed" by the notch. Combined with the optimization of the internal flow field by the expandable movable guide support sleeve 260 and continuous negative pressure aspiration, the thrombus can be removed efficiently and thoroughly, and the risk of massive bleeding caused by the instrument scratching the blood vessel wall or thrombus fragments impacting the blood vessel wall is minimized, which significantly improves the safety of the operation.

[0039] In summary, this thrombus aspiration device is not only reasonably designed but also simple to operate. It can effectively increase the vascular space at the thrombus site, greatly facilitating operation and preventing massive bleeding. Therefore, this device is suitable for industry promotion.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0041] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

Claims

1. A thrombus aspiration device, characterized in that, include: A drainage kit, comprising a drainage guide tube, a support side tube, and a negative pressure suction component; The distal end of the drainage guide tube has an abutment notch; the support side tube is fixed to one side of the drainage guide tube, near the distal end, and is located on the opposite side of the drainage guide tube opposite the abutment notch; the negative pressure suction element is installed at the proximal end of the drainage guide tube; and The suction body is installed inside the drainage assembly and located inside the drainage guide tube. The suction body includes a mounting sleeve, a pull assembly, and a micro linear motor. The micro linear motor is installed inside the mounting sleeve, and its rotation axis extends outward. The mounting sleeve is installed on one side of the inner wall of the drainage guide tube, close to the direction of the abutment notch. The pull assembly is installed on the rotation axis of the micro linear motor. The notch abuts against the thrombus, the suction body contacts the thrombus and breaks it up, and the thrombus is discharged by the negative pressure suction device.

2. The thrombus aspiration device according to claim 1, characterized in that, The support side tube is made of metal elastic mesh.

3. The thrombus aspiration device according to claim 1, characterized in that, The pull-out assembly includes a spline shaft, a spline sleeve, and a fixing plate. The fixing plate is fixedly connected to the inner wall of the mounting sleeve. The spline sleeve is rotatably mounted on the fixing plate. The mover of the micro linear motor is rotatably connected to one end of the spline shaft, and the shaft of the spline shaft passes through the spline sleeve.

4. The thrombus aspiration device according to claim 3, characterized in that, The suction body includes a thrombus puller, one end of which is fixedly connected to the other end of the spline shaft; there are two thrombus pullers, which are arranged opposite each other and have different lengths.

5. A thrombus aspiration device according to claim 3, characterized in that, The suction body also includes a rotary coupling, which includes a fixed disk and a rotating disk. One side of the rotating disk is rotatably mounted in the inner cavity of the fixed disk. The fixed disk is fixedly connected to the mover of the micro linear motor, and the other side of the rotating disk is fixedly connected to one end of the spline shaft.

6. The thrombus aspiration device according to claim 1, characterized in that, The suction body also includes a movable guide support sleeve, which is disposed inside the drainage guide tube and abuts against the inner wall of the drainage guide tube; the movable guide support sleeve is close to the abutment notch and is located in the opposite direction to the mounting sleeve; and the movable guide support sleeve is made of metal elastic mesh.

7. The thrombus aspiration device according to claim 1, characterized in that, The negative pressure suction device includes a suction pump and a drainage bag; the inlet end of the suction pump is connected to the proximal end of the drainage guide tube, and the outlet end of the suction pump is connected to the drainage bag.

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