Mechanical assembly for removing intravascular obstructions

Abstract

The application relates to the technical field of medical devices, and discloses a mechanical assembly for removing intravascular obstruction, which comprises a base sliding rail, the inside of the base sliding rail is provided with a cavity, one side of the base sliding rail is provided with two layers of steps with different heights, and each step is formed by the vertical intersection of a vertical plate and a horizontal plate. The mechanical assembly for removing intravascular obstruction can automatically detect the rotating speed of a large guide wheel according to the centripetal force by arranging a detection piece, and can slow down the micro guide wire or the stent retriever by using the rubber pad in the speed reducer, so that the blood vessel of a patient is not damaged due to the too fast pushing of the guide wire by a novice doctor, the large guide wheel can be used to steplessly adjust the pushing distance of the guide wire, and the rotating resistance of the rubber wheel against the large guide wheel can reduce the inertial operation of the doctor when rotating the large guide wheel, so that the control ability of the novice doctor to the pushing precision of the micro guide wire or the stent retriever is improved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a mechanical component for removing intravascular obstruction. Background Technology

[0002] Cerebral infarction refers to ischemic necrosis or cerebral softening of localized brain tissue caused by impaired blood supply to the brain, ischemia, and hypoxia. Common clinical types of cerebral infarction include cerebral thrombosis, lacunar infarction, and cerebral embolism. Treatment usually requires the removal of thrombi in cerebral blood vessels using neurointerventional techniques. Neurointerventional techniques mainly utilize intravascular catheter manipulation techniques supported by a digital subtraction angiography system to diagnose and treat lesions affecting the human neurovascular system.

[0003] During the procedure, the surgeon uses a puncture sheath to insert a thrombectomy stent from the patient's femoral artery to the cerebral artery. Throughout the process, the surgeon must slowly advance the stent with the support of a digital subtraction angiography system until it reaches the thrombus. This process usually requires the surgeon to use both hands. However, for novice surgeons, it is difficult to control the speed and precision of pushing the guidewire and thrombectomy stent, especially when near the thrombus. More precise control of the microcatheter and thrombectomy stent is required. In actual surgery, multiple surgeons are needed to cooperate and change catheters and guidewires multiple times. Novice surgeons are prone to inserting the guidewire too quickly due to nervousness, which can cause the patient's blood vessel to rupture and result in a medical accident. Summary of the Invention

[0004] Given the difficulty for novice doctors in controlling the speed and precision of stent delivery for thrombectomy using existing technologies, a mechanical component for removing intravascular obstruction is proposed.

[0005] Its purpose is to help novice doctors control the speed of advancing the guidewire and thrombectomy stent, avoid medical accidents, and improve surgical efficiency.

[0006] The technical solution of the present invention is a mechanical component for removing intravascular obstruction, including a base slide rail, the base slide rail having a cavity inside, and two steps of different heights on one side of the base slide rail, each step being formed by the perpendicular intersection of a vertical plate and a horizontal plate. A plurality of sliding blocks are slidably disposed on the inner wall of the base slide rail, and a pair of clamping springs are disposed on the top of each sliding block. Each pair of clamping springs has a starting end for clamping a medical catheter. Both sides of each sliding block are stepped. The invention also includes an adjustment mechanism disposed on the inner wall of the sliding block and a propulsion mechanism disposed on the inner wall of the base slide rail. The adjustment mechanism includes a cylindrical hole at the center of the bottom of the sliding block, a lifting column slidably disposed on the inner wall of the cylindrical hole, a spring fixedly disposed between the bottom of the lifting column and the inner wall of the cylindrical hole, a sliding groove on the bottom stepped surface of one side of the sliding block, and lifting grooves respectively disposed on two stepped surfaces on the side of the sliding block away from the sliding groove. The inner wall of the sliding groove is provided with a locking element to prevent the doctor from accidentally moving the sliding block, and the inner wall of the lifting groove is slidably disposed with an adjusting element for adjusting the position of the sliding block. Both the sliding groove and the lifting groove are connected to the cylindrical hole. The propulsion mechanism includes a movable block slidably disposed on the top of the base slide rail, an elastic flap fixedly disposed on the side of the movable block, several grooves adapted to the elastic flaps formed on the inner wall of the top of the base slide rail, a support frame fixedly disposed on the top of the movable block, a small guide wheel rotatably disposed at one end of the top of the movable block, a large guide wheel abutting against the side of the small guide wheel, a detection element disposed on the side of the large guide wheel for detecting the rotational speed of the large guide wheel, and a speed reduction element disposed on the top of the movable block for reducing the guide wire movement speed.

[0007] Furthermore, the locking component includes a wave tooth one formed on one side of the inner wall of the base slide rail, a Z-shaped frame slidably disposed on the inner wall of the sliding groove, a top block fixedly disposed on the end of the Z-shaped frame, a wave tooth two fixedly disposed on the side of the top block and engaging with the wave tooth, a protrusion fixedly disposed on the side of the lifting column and slidably disposed on the inner wall of the sliding groove, and a spring two fixedly disposed on the Z-shaped frame and the inner wall of the sliding groove.

[0008] Furthermore, the end of the Z-shaped frame away from the top block abuts against the side of the protrusion, and a notch is provided on the bottom edge of the sliding block near the wave tooth. The top and bottom of the top block abut against the inner wall of the notch and the inner wall of the base slide rail, respectively.

[0009] Furthermore, the adjusting component includes a rectangular hole opened on the vertical surface of each step of the base slide rail, a transmission rod slidably disposed on the inner wall of each lifting groove, a sliding column slidably disposed on the horizontal surface of each step, a drive gear sleeved and fixedly disposed on the side of each sliding column, a rotating disk fixedly disposed on the top of each drive gear, and teeth fixedly disposed on the vertical surface of each step.

[0010] Furthermore, one end of each transmission rod is fixedly disposed on the side of the lifting column, and the end of each transmission rod away from the lifting column is sleeved and slidably disposed on the side of the sliding column. Each drive gear is engaged with teeth, and the diameter of the drive gear at the higher position is smaller than that of the drive gear at the lower position.

[0011] Furthermore, two support frames are provided and linearly arranged at the center of the top of the moving block, and a rotating bracket is rotatably provided on the inner wall of the large guide wheel, the rotating bracket being elastically positioned on the top of the moving block.

[0012] Furthermore, the detection component includes a rubber ring fixedly disposed on the inner wall of one side of the large guide wheel, a rubber wheel and a functional wheel rotatably disposed on one side of the rotating bracket, several rectangular grooves opened on the side of the functional wheel, a top rod slidably disposed on the inner wall of each rectangular groove, a transmission wheel rotatably disposed on the side of the rotating bracket near the functional wheel, a rubber sleeve sleeved and fixedly disposed on the side of the transmission wheel, and a winding column fixedly disposed on the side of the transmission wheel.

[0013] Furthermore, the rubber wheel is fixedly mounted on the side of the functional wheel near the large guide wheel. The rubber wheel and the functional wheel are coaxially arranged. The radius of the large guide wheel is much larger than the radius of the rubber wheel. The radius of the functional wheel is larger than the radius of the rubber wheel. The side of the rubber wheel abuts against the inner wall of the rubber ring. The transmission wheel is located directly below the functional wheel. The end face of the push rod located inside the rectangular groove is elastically connected to the inner wall of the rectangular groove.

[0014] Furthermore, the deceleration component includes a conical sleeve fixedly disposed on the top of the moving block, several notches and grooves opened on the side of the conical sleeve, several folding plates fixedly disposed on the side of the conical sleeve, a rubber pad fixedly disposed at the end of each folding plate, a sliding rail fixedly disposed on the top of the moving block, a compression ring slidably disposed on the inner wall of the sliding rail via a bracket, and a pull rope fixedly disposed on the side of the compression ring.

[0015] Furthermore, the extrusion ring is coaxially arranged with the conical sleeve, the inner wall of the extrusion ring abuts against the side of each folding plate, the end of the pull rope away from the extrusion ring is fixedly arranged on the side of the winding column, and the side of the extrusion ring is elastically connected to the end of the sliding rail away from the stretching end.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This mechanical component for removing intravascular obstruction features different sliding blocks that highlight different catheters. With the support of the base rails, each catheter is clearly distinguished by color and arranged in an orderly manner, reducing the time novice doctors spend identifying different catheters. Furthermore, the sliding blocks can be adjusted in position via an adjustment mechanism, allowing doctors to adjust the position of different catheters with just one hand, thus avoiding contact between both hands and reducing the risk of infection.

[0017] 2. This mechanical component for removing intravascular obstruction allows doctors to make coarse and fine adjustments to the catheter on the sliding block using drive gears of different diameters. This increases the accuracy of catheter advancement for novice doctors. During surgery, a locking mechanism can lock the sliding block to prevent it from moving accidentally and causing catheter displacement, which could adversely affect the patient. This increases the safety of the surgery and reduces the probability of medical accidents.

[0018] 3. This mechanical component for removing intravascular obstruction, through the inclusion of a detection element, can automatically detect the rotational speed of the large guide wheel based on centripetal force. It also utilizes a rubber pad in the deceleration component to slow down the microguidewire or thrombectomy stent, thus preventing novice doctors from damaging the patient's blood vessels due to excessively rapid guidewire advancement. Furthermore, the large guide wheel allows for stepless adjustment of the guidewire advancement distance, while the reaction resistance of the rubber wheel on the large guide wheel reduces the doctor's inertial operation during rotation, thereby improving the novice doctor's control over the precision of microguidewire or thrombectomy stent advancement. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the base slide rail of the present invention; Figure 3 This is a schematic diagram of the sliding block of the present invention; Figure 4 This is a schematic diagram of the internal structure of the sliding block of the present invention; Figure 5 This is a schematic diagram of the structure of the movable block of the present invention; Figure 6 This is a schematic diagram of the propulsion mechanism of the present invention; Figure 7 This is a schematic diagram of the structure of the large guide wheel and the small guide wheel of the present invention; Figure 8 This is a schematic diagram of the structure of the detection element of the present invention; Figure 9 This is a schematic diagram of the structure of the functional wheel of the present invention; Figure 10 This is a schematic diagram of the speed reduction component structure of the present invention; Figure 11 This is a schematic diagram of the structure of the folding plate of the present invention.

[0020] In the diagram: 1. Base slide rail; 2. Sliding block; 21. Clamping spring; 3. Adjustment mechanism; 31. Cylindrical hole; 32. Lifting column; 33. Spring 1; 34. Sliding groove; 35. Lifting groove; 36. Locking element; 361. Wave tooth 1; 362. Z-shaped frame; 363. Top block; 364. Wave tooth 2; 365. Protrusion; 366. Spring 2; 37. Adjustment element; 371. Transmission rod; 372. Sliding column; 373. Drive gear; 374. Rotating disk; 375. Tooth 4. Propulsion mechanism; 41. Moving block; 42. Elastic folding plate; 43. Support frame; 44. Small guide wheel; 45. Large guide wheel; 451. Rotating bracket; 46. Detection component; 461. Rubber ring; 462. Rubber wheel; 463. Functional wheel; 464. Top rod; 465. Transmission wheel; 466. Rubber sleeve; 467. Winding column; 47. Speed ​​reducer; 471. Conical sleeve; 472. Folding plate; 473. Rubber pad; 474. Sliding rail; 475. Extrusion ring; 476. Pull rope. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1, referring to Figures 1-3 The first embodiment of the present invention provides a mechanical component for removing intravascular obstruction, including a base slide rail 1, the base slide rail 1 having a cavity inside, and two steps of different heights on one side of the base slide rail 1, each step being formed by the vertical intersection of a vertical plate and a horizontal plate, and a plurality of sliding blocks 2 slidably disposed on the inner wall of the base slide rail 1, each sliding block 2 having a pair of clamping springs 21 at its top, each pair of clamping springs 21 having a starting end for clamping a medical catheter.

[0023] Each sliding block 2 has a clamping spring 21 at its top that can clamp the end of a catheter. The clamping position is where each catheter is connected to the Y-shaped valve. This position is thicker than the slender tube body and can be clamped by the clamping spring 21. The clamping spring 21 itself is elastic. After being spread open by the catheter end, it can use its elasticity to clamp the catheter. Multiple clamping springs 21 can clamp multiple catheters. The sliding block 2 can move under the doctor's operation, making multiple catheters clearer to the doctor and reducing the time novice doctors spend identifying different catheters. Each sliding block 2 has stepped sides and also includes an adjustment mechanism 3 set on the inner wall of the sliding block 2 and a propulsion mechanism 4 set on the inner wall of the base slide rail 1.

[0024] Specifically, during surgery, a guiding catheter is required. Inside the guiding catheter is an intermediate catheter, which in turn contains a microcatheter. The microcatheter contains a thrombectomy stent or microguidewire. During surgery, the surface color of the catheters is generally white, transparent, or bluish-green. These colors are similar to the colors of the bed sheets, surgical drapes, and the doctor's gloves, making it difficult for novice doctors to quickly distinguish the positions of different catheters. This requires more time to identify the catheters, resulting in decreased surgical efficiency. However, different sliding blocks 2 highlight the different catheters. With the support of the base slide rail 1, the colors of each catheter are clearly distinguished and arranged in an orderly manner. Furthermore, the position of the sliding blocks 2 can be adjusted by the adjustment mechanism 3. Doctors only need one hand to adjust the position of different catheters, which also avoids touching the catheters with both hands and reduces the risk of infection.

[0025] Example 2, refer to Figures 3-5 This is the second embodiment of the present invention, which differs from the first embodiment in that: the adjusting mechanism 3 includes a cylindrical hole 31 opened at the center of the bottom of the sliding block 2, the cylindrical hole 31 being a cylindrical cavity that does not penetrate the bottom or top of the sliding block 2, a lifting column 32 slidably disposed on the inner wall of the cylindrical hole 31, a spring 33 fixedly disposed between the bottom of the lifting column 32 and the inner wall of the cylindrical hole 31, the spring 33 being used to reset after the lifting column 32 moves, and a sliding groove 34 opened on the stepped surface at the bottom of one side of the sliding block 2. 4. The whole is a rectangular cavity with one side connected to the cylindrical hole 31 and the other side connected to the outside of the sliding block 2. Lifting grooves 35 are respectively opened on the side of the sliding block 2 away from the sliding groove 34. The lifting groove 35 is a rectangular cavity with one side connected to the cylindrical hole 31 and the other side connected to the outside of the sliding frame. The inner wall of the sliding groove 34 is provided with a locking member 36 to prevent the doctor from accidentally moving the sliding block 2. The inner wall of the lifting groove 35 is slidably provided with an adjusting member 37 to adjust the position of the sliding block 2. Both the sliding groove 34 and the lifting groove 35 are connected to the cylindrical hole 31.

[0026] The locking member 36 includes a wave tooth 361 formed on one side of the inner wall of the base slide rail 1, a Z-shaped frame 362 slidably disposed on the inner wall of the sliding groove 34, one end of the Z-shaped frame 362 sliding on the inner wall of the sliding groove 34 and the other end extending to the outside of the sliding block 2, a top block 363 fixedly disposed at the end of the Z-shaped frame 362, the top block 363 being connected to one end of the Z-shaped frame 362 outside, and a wave tooth 364 fixedly disposed on the side of the top block 363 and engaging with the wave tooth. Each tooth in the wave tooth 361 and the wave tooth 364 is a triangular prism with sharp edges, and the two are misaligned and opposite to each other, so they can be engaged through the gap between the triangular prisms.

[0027] A protrusion 365 is fixedly installed on the side of the lifting column 32 and slidably installed on the inner wall of the sliding groove 34. The protrusion 365 has an arc-shaped surface for pressing the Z-shaped frame 362 and a vertical plane for abutting the end of the Z-shaped frame 362 along the axial direction of the lifting column 32 from top to bottom. When the sliding block 2 is locked, the end of the Z-shaped frame 362 abuts against the vertical plane. The Z-shaped frame 362 drives the wave tooth 1 361 and wave tooth 2 364 to engage. A spring 2 366 is fixedly installed on the Z-shaped frame 362 and the inner wall of the sliding groove 34. The spring 2 366 is used to reset after the Z-shaped frame 362 moves. The end of the Z-shaped frame 362 away from the top block 363 abuts against the side of the protrusion 365. A notch is opened on the bottom edge of the sliding block 2 near the wave tooth 1 361. The top and bottom of the top block 363 abut against the inner wall of the notch and the inner wall of the base slide rail 1, respectively.

[0028] Specifically, during surgery, novice doctors, unfamiliar with the operation of various instruments, are prone to accidentally touching the sliding block 2. Therefore, the sliding block 2 should be kept locked under normal circumstances. In the locked state, the lifting column 32 does not move, and one end of the Z-shaped frame 362 abuts against the protrusion 365. At this time, the elastic force of the second spring 366 pushes the Z-shaped frame 362 towards the lifting column 32. The top block 363 at the other end of the Z-shaped frame 362 drives the second wave tooth 364 to engage with the first wave tooth 361. The sliding block 2 is restricted as a whole and cannot move, thus locking the sliding block 2 and preventing it from moving due to accidental touch by the doctor, which could lead to catheter displacement and adverse effects on the patient, thereby reducing the probability of medical accidents.

[0029] Reference Figures 3-5 The adjusting component 37 includes a rectangular hole formed in the vertical surface of each step of the base slide rail 1, a transmission rod 371 slidably disposed on the inner wall of each lifting groove 35, a sliding column 372 slidably disposed on the horizontal surface of each step, the sliding column 372 sliding along the length direction of the base slide rail 1, a drive gear 373 sleeved and fixedly disposed on the side of each sliding column 372, and a rotating disk 374 fixedly disposed on the top of each drive gear 373. The surface of the rotating disk 374 is provided with protrusions to increase the friction between the doctor's fingers and the side of the rotating disk 374, thereby facilitating the doctor to rotate the rotating disk 374. The teeth 375 are fixedly installed on the vertical surface of each step. One end of each transmission rod 371 is fixedly installed on the side of the lifting column 32. The end of the transmission rod 371 away from the lifting column 32 is provided with an ear plate for pressing. The doctor can press the transmission rod 371 with his index and ring fingers and use his thumb to rotate the rotating disk 374. The end of each transmission rod 371 away from the lifting column 32 is sleeved and slidably installed on the side of the sliding column 372. Each drive gear 373 meshes with the teeth 375. The diameter of the drive gear 373 at the higher position is smaller than that of the drive gear 373 at the lower position.

[0030] Specifically, when it is necessary to move the sliding block 2, the locked state must be released first. The doctor uses the index and ring fingers of one hand to press the transmission rod 371. After the transmission rod 371 is pressed, it drives the lifting column 32 to move down. The lifting column 32 drives the protrusion 365 to move down. After the Z-shaped frame 362 loses its support, it is squeezed by the second spring 366 towards the side of the lifting column 32, which causes the top plate to separate the second wave tooth 364 and the first wave tooth 361, thereby releasing the locked state. At this time, the doctor uses his thumb to turn the rotating disk 374. The rotating disk 374 drives the drive gear 373 to rotate. Under the action of the teeth 375, the sliding block 2 is moved. Then the doctor can adjust the position of the catheter.

[0031] After the locking state is released, the sliding block 2 can be moved more precisely by the drive gear 373 than by moving the sliding block 2 directly. The two drive gears 373 have different diameters, typically set to a difference of two times. Therefore, the doctor can achieve different sliding block 2 movement speeds by rotating different drive gears 373, ensuring both precision and speed. In practical use, the larger diameter drive gear 373 can be used for rapid advancement and coarse adjustment of the catheter tip position, while the smaller diameter drive gear 373 can be used for fine adjustment of the catheter tip position. This is significant for microcatheters that restrict the movement of thrombectomy stents. The remaining structure is the same as in Example 1.

[0032] Example 3, referring to Figures 5-9 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that: the propulsion mechanism 4 includes a movable block 41 slidably disposed on the top of the base slide rail 1, and an elastic flap 42 fixedly disposed on the side of the movable block 41. The elastic flap 42 is an elastic metal sheet, which is V-shaped in general. One end is a fixed end fixed to the side wall of the sliding block 2, and the other end is a movable end that only abuts against the sliding block 2. When squeezed by the inner wall of the base slide rail 1, the movable end of the elastic flap 42 extends to prevent the movable block 41 from being obstructed. When approaching the groove, the elastic flap 42 slides into the groove, the movable end returns to its original position, and has a certain fixing effect on the movable block 41 to prevent the movable block 41 from shifting. Several grooves adapted to the elastic flap 42 are opened on the inner wall of the top of the base slide rail 1.

[0033] A support frame 43 is fixedly mounted on the top of the movable block 41. A small guide wheel 44 is rotatably mounted on one end of the top of the movable block 41, and a large guide wheel 45 abuts against the side of the small guide wheel 44. The large guide wheel 45 and the small guide wheel 44 clamp the microguide wire or retrieval bracket against the side wall, so that the microguide wire or retrieval bracket can be moved after the large guide wheel 45 is rotated. A detection element 46 is mounted on the side of the large guide wheel 45 to detect the rotation speed of the large guide wheel 45. A speed reduction element 47 is mounted on the top of the movable block 41 to reduce the speed of the guide wire. Two support frames 43 are provided and linearly arranged at the center of the top of the movable block 41. The support frames 43 are used to support the microguide wire or retrieval bracket and prevent deceleration. When component 47 is activated, the microguidewire or thrombectomy stent may bend. The two support frames 43 can ensure that the microguidewire or thrombectomy stent remains horizontal in the section of the deceleration component 47, thereby avoiding direct contact between the microguidewire or thrombectomy stent and the rubber pad 473 used for deceleration inside the deceleration component 47. The inner wall of the large guide wheel 45 is rotatably equipped with a rotating bracket 451. The rotating bracket 451 is elastically set on the top of the moving block 41. A spring connects the bottom of the rotating bracket 451 and the top of the moving block 41. When advancing the guidewire, the doctor needs to press the large guide wheel 45 to clamp the microguidewire or thrombectomy stent. When placing the microguidewire or thrombectomy stent, the large guide wheel 45 can be released.

[0034] The testing component 46 includes a rubber ring 461 fixedly mounted on the inner wall of one side of the large guide wheel 45, a rubber wheel 462 and a functional wheel 463 rotatably mounted on one side of the rotating bracket 451, several rectangular grooves formed on the side of the functional wheel 463, the several rectangular grooves being evenly arranged in a circular array on the side of the functional wheel 463, a top rod 464 slidably mounted on the inner wall of each rectangular groove, a transmission wheel 465 rotatably mounted on the side of the rotating bracket 451 near the functional wheel 463, a rubber sleeve 466 sleeved and fixedly mounted on the side of the transmission wheel 465, the side of the rubber sleeve 466 being evenly arranged in a circular array with several strip-shaped protrusions, and a fixed mounting... A winding column 467 is placed on the side of the transmission wheel 465. A rubber wheel 462 is fixedly set on the side of the functional wheel 463 near the large guide wheel 45. The rubber wheel 462 and the functional wheel 463 are coaxially arranged. The radius of the large guide wheel 45 is much larger than the radius of the rubber wheel 462, generally more than five times larger. The radius of the functional wheel 463 is larger than the radius of the rubber wheel 462, generally about twice larger. The side of the rubber wheel 462 abuts against the inner wall of the rubber ring 461. The transmission wheel 465 is located directly below the functional wheel 463. The end face of the push rod 464 located inside the rectangular groove is elastically connected to the inner wall of the rectangular groove. The two can be connected by a spring.

[0035] Reference Figures 10-11The deceleration component 47 includes a conical sleeve 471 fixedly mounted on the top of the moving block 41. During surgery, the microguidewire or thrombectomy stent needs to pass through the central part of the sleeve. Several notches and slots are opened on the side of the conical sleeve 471. Several folding plates 472 are fixedly mounted on the side of the conical sleeve 471. A rubber pad 473 is fixedly mounted at the end of each folding plate 472. A sliding rail 474 is fixedly mounted on the top of the moving block 41. A compression ring 475 is slidably mounted on the inner wall of the sliding rail 474 via a bracket. A pull rope 476 is fixedly mounted on the side of the compression ring 475. The compression ring 475 is coaxially mounted with the conical sleeve 471. The inner wall of the compression ring 475 abuts against the side of each folding plate 472. The end of the pull rope 476 away from the compression ring 475 is fixedly mounted on the side of the winding column 467. The side of the compression ring 475 is elastically connected to the end of the sliding rail 474 away from the tension. The two can be connected by elastic components such as springs and elastic ropes.

[0036] Specifically, when the microguidewire or thrombectomy stent passes between the large guide wheel 45 and the small guide wheel 44 and begins to enter the body, the doctor presses the large guide wheel 45 to clamp the microguidewire or thrombectomy stent, while simultaneously rotating the large guide wheel 45 to slowly advance the microguidewire or thrombectomy stent. The rubber wheel 462, through its high transmission ratio, can further amplify the rotational speed of the large guide wheel 45, thereby increasing the centrifugal force on the push rod 464 inside the functional wheel 463. The push rod 464 then begins to overcome the elastic force of the elastic element and slides outwards, reaching its maximum value at the bottom of the functional wheel 463 under the influence of gravity and centrifugal force. If a novice doctor operates too quickly, the push rod 464 will slide too far and contact the protrusion on the side of the rubber sleeve 466, causing the transmission wheel 465 to rotate. After the transmission wheel 465 rotates, it begins to wind the pull rope 476. 476 then pulls the compression ring 475, which, after being pulled, moves closer to and compresses the folding plate 472. The compressed folding plate 472 then moves the rubber pad 473 closer to the microguidewire or thrombectomy stent at the center of the conical sleeve 471, thus slowing it down. This slowing down of the microguidewire or thrombectomy stent creates feedback resistance on the large guide wheel 45. Novice doctors, feeling this resistance, realize they are advancing too quickly and proactively slow down, preventing damage to the patient's blood vessels due to excessive guidewire advancement. Furthermore, the large guide wheel 45 allows for stepless adjustment of the guidewire advancement distance, while the rotational resistance of the rubber wheel 462 reduces the doctor's inertial operation during the rotation of the large guide wheel 45, thereby improving the novice doctor's control over the precision of microguidewire or thrombectomy stent advancement. The remaining structure is the same as in Example 2.

[0037] Based on embodiments 1-3, the working principle of this invention is as follows: The sliding block 2 on the base slide rail 1, with the help of the top clamping spring 21, clamps the ends of each catheter. The sliding block 2 can move along the slide rail to make the catheters clearly arranged, solving the problem that the catheter color is similar to the surgical environment, making it difficult for novice doctors to distinguish them. At the same time, it avoids hand contact with the catheters, reducing the risk of infection. Under normal conditions, the sliding block 2 is locked by the Z-shaped frame 362 driving the wave tooth 364 to engage with the wave tooth 361 of the slide rail to prevent accidental displacement. During adjustment, the doctor presses the transmission rod 371 to drive the lifting column 32 to move down, causing the wave tooth to separate and unlock. Then, the movement of the sliding block 2 is controlled by the drive gears 373 of different diameters. The large gear is used for quick coarse adjustment, and the small gear achieves precise fine adjustment. When advancing the guidewire or thrombectomy stent, press the large guide wheel 45 to clamp it with the small guide wheel 44, and rotate the large guide wheel 45 to advance it. The rubber wheel 462 amplifies the rotation speed of the large guide wheel 45, causing the functional wheel 463 and the push rod 464 to extend outward under centrifugal force. If the advancement is too fast, the push rod 464 will trigger the transmission wheel 465 to wind the pull rope 476. The pull rope 476 drives the compression ring 475 to compress the folding plate 472, causing the rubber pad 473 to clamp the guidewire and slow down. The resistance feedback prompts the doctor to slow down, improving the safety and accuracy of the operation.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A mechanical assembly for removing intravascular obstruction, comprising a base slide rail (1), wherein the base slide rail (1) has a cavity inside, and one side of the base slide rail (1) has two steps of different heights, each step being formed by the perpendicular intersection of a vertical plate and a horizontal plate, and a plurality of sliding blocks (2) are slidably disposed on the inner wall of the base slide rail (1), each sliding block (2) having a pair of clamping springs (21) at its top, each pair of clamping springs (21) having a starting end for clamping a medical catheter, and both sides of each sliding block (2) being stepped, characterized in that, It also includes an adjustment mechanism (3) disposed on the inner wall of the sliding block (2) and a propulsion mechanism (4) disposed on the inner wall of the base slide rail (1); The adjustment mechanism (3) includes a cylindrical hole (31) at the center of the bottom of the sliding block (2), a lifting column (32) slidably disposed on the inner wall of the cylindrical hole (31), a spring (33) fixedly disposed between the bottom of the lifting column (32) and the inner wall of the cylindrical hole (31), a sliding groove (34) on the bottom stepped surface of one side of the sliding block (2), and lifting grooves (35) on two stepped surfaces on the side of the sliding block (2) away from the sliding groove (34). The inner wall of the sliding groove (34) is provided with a locking element (36) to prevent the doctor from accidentally moving the sliding block (2). The inner wall of the lifting groove (35) is slidably provided with an adjusting element (37) for adjusting the position of the sliding block (2). The sliding groove (34) and the lifting groove (35) are both connected to the cylindrical hole (31). The propulsion mechanism (4) includes a movable block (41) slidably disposed on the top of the base slide rail (1), an elastic flap (42) fixedly disposed on the side of the movable block (41), several grooves adapted to the elastic flap (42) on the inner wall of the top of the base slide rail (1), a support frame (43) fixedly disposed on the top of the movable block (41), a small guide wheel (44) rotatably disposed on one end of the top of the movable block (41), a large guide wheel (45) abutting against the side of the small guide wheel (44), a detection element (46) disposed on the side of the large guide wheel (45) and used to detect the rotation speed of the large guide wheel (45), and a deceleration element (47) disposed on the top of the movable block (41) and used to reduce the guide wire movement speed.

2. The mechanical component for removing intravascular obstruction according to claim 1, characterized in that: The locking component (36) includes a wave tooth one (361) opened on one side of the inner wall of the base slide rail (1), a Z-shaped frame (362) slidably disposed on the inner wall of the sliding groove (34), a top block (363) fixedly disposed on the end of the Z-shaped frame (362), a wave tooth two (364) fixedly disposed on the side of the top block (363) and engaged with the wave tooth, a protrusion (365) fixedly disposed on the side of the lifting column (32) and slidably disposed on the inner wall of the sliding groove (34), and a spring two (366) fixedly disposed on the Z-shaped frame (362) and the inner wall of the sliding groove (34).

3. A mechanical component for removing intravascular obstruction according to claim 2, characterized in that: The Z-shaped frame (362) abuts against the side of the protrusion (365) at one end away from the top block (363). The bottom of the sliding block (2) has a notch on one side edge near the wave tooth (361). The top and bottom of the top block (363) abut against the inner wall of the notch and the inner wall of the base slide rail (1), respectively.

4. A mechanical component for removing intravascular obstruction according to claim 1, characterized in that: The adjusting component (37) includes a rectangular hole opened on the vertical surface of each step of the base slide rail (1), a transmission rod (371) slidably disposed on the inner wall of each lifting groove (35), a sliding column (372) slidably disposed on the horizontal surface of each step, a drive gear (373) sleeved and fixedly disposed on the side of each sliding column (372), a rotating disk (374) fixedly disposed on the top of each drive gear (373), and teeth (375) fixedly disposed on the vertical surface of each step.

5. A mechanical component for removing intravascular obstruction according to claim 4, characterized in that: One end of each of the transmission rods (371) is fixedly disposed on the side of the lifting column (32), and the end of each transmission rod (371) away from the lifting column (32) is sleeved and slidably disposed on the side of the sliding column (372). Each of the drive gears (373) meshes with teeth (375), and the diameter of the drive gear (373) at the higher position is smaller than that of the drive gear (373) at the lower position.

6. A mechanical component for removing intravascular obstruction according to claim 1, characterized in that: The support frame (43) has two parts and is linearly arranged at the center of the top of the moving block (41). The inner wall of the large guide wheel (45) is rotatably provided with a rotating bracket (451), and the rotating bracket (451) is elastically arranged on the top of the moving block (41).

7. A mechanical component for removing intravascular obstruction according to claim 1, characterized in that: The detection component (46) includes a rubber ring (461) fixedly disposed on the inner wall of one side of the large guide wheel (45), a rubber wheel (462) and a functional wheel (463) rotatably disposed on one side of the rotating bracket (451), several rectangular grooves opened on the side of the functional wheel (463), a top rod (464) slidably disposed on the inner wall of each rectangular groove, a transmission wheel (465) rotatably disposed on the side of the rotating bracket (451) near the functional wheel (463), a rubber sleeve (466) sleeved and fixedly disposed on the side of the transmission wheel (465), and a winding column (467) fixedly disposed on the side of the transmission wheel (465).

8. A mechanical component for removing intravascular obstruction according to claim 7, characterized in that: The rubber wheel (462) is fixedly mounted on the side of the functional wheel (463) near the large guide wheel (45). The rubber wheel (462) and the functional wheel (463) are coaxially mounted. The radius of the large guide wheel (45) is much larger than the radius of the rubber wheel (462). The radius of the functional wheel (463) is larger than the radius of the rubber wheel (462). The side of the rubber wheel (462) abuts against the inner wall of the rubber ring (461). The transmission wheel (465) is located directly below the functional wheel (463). The end face of the push rod (464) located inside the rectangular groove is elastically connected to the inner wall of the rectangular groove.

9. A mechanical component for removing intravascular obstruction according to claim 1, characterized in that: The speed reduction component (47) includes a conical sleeve (471) fixedly disposed on the top of the moving block (41), several notches and grooves opened on the side of the conical sleeve (471), several folding plates (472) fixedly disposed on the side of the conical sleeve (471), a rubber pad (473) fixedly disposed at the end of each folding plate (472), a sliding rail (474) fixedly disposed on the top of the moving block (41), a compression ring (475) slidably disposed on the inner wall of the sliding rail (474) via a bracket, and a pull rope (476) fixedly disposed on the side of the compression ring (475).

10. A mechanical component for removing intravascular obstruction according to claim 9, characterized in that: The compression ring (475) is coaxially arranged with the conical sleeve (471). The inner wall of the compression ring (475) abuts against the side of each folding plate (472). The end of the pull rope (476) away from the compression ring (475) is fixedly arranged on the side of the winding column (467). The side of the compression ring (475) is elastically connected to the end of the sliding rail (474) away from the stretching end.

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