Vascular intracavity plaque rotary cutting and thrombus suction integrated device

Abstract

The invention relates to the technical field of medical instruments, and discloses a blood vessel intracavity plaque rotary cutting and thrombus aspiration integrated device which comprises a guiding tube and a rotary cutting tube, the rotary cutting tube abuts against the lower portion of the guiding tube, and a connecting mechanism is arranged between the ends, close to each other, of the guiding tube and the rotary cutting tube. The guiding pipe and the rotary cutting pipe are in limiting connection through a connecting mechanism, a miniature double-shaft motor is installed in the lower end of the rotary cutting pipe, the output end of the lower side of the miniature double-shaft motor is fixedly sleeved with a rotary cutting knife, a cavity is formed in one side of the rotary cutting pipe, and a suction inlet is formed in the lower end of the cavity; a fixing shell is fixedly arranged on the inner wall of one side of the middle end of the rotary cutting pipe, and a piston is arranged in the fixing shell in a sliding mode. According to the intravascular plaque rotary cutting and thrombus suction integrated device, after plaque rotary cutting is conducted, thrombus can be directly sucked out, suction equipment does not need to be inserted for the second time, the working efficiency can be greatly improved, and the pain of a patient is relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a blood vessel intraluminal plaque and thrombus aspiration integrated device. BACKGROUND

[0002] In the treatment of vascular diseases, plaque and thrombus in the blood vessel lumen are common pathogenic factors, which can cause blood vessel stenosis or even occlusion, affect blood circulation, and even endanger the patient's life. At present, the treatment of plaque and thrombus in the blood vessel lumen usually adopts the combination of plaque atherectomy and thrombus aspiration.

[0003] However, in the existing treatment process, plaque atherectomy and thrombus aspiration are usually performed separately, i.e. first using a plaque atherectomy device to perform plaque atherectomy, then withdrawing the atherectomy device and inserting a thrombus aspiration device to perform thrombus aspiration. This step-by-step operation method has many disadvantages: on the one hand, it requires two instrument insertion operations, increasing the operation time and reducing the work efficiency; on the other hand, multiple instrument insertions can cause additional damage to the patient's blood vessels, increasing the patient's pain and the risk of surgery. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application provides a blood vessel intraluminal plaque and thrombus aspiration integrated device, which can directly aspirate thrombus after plaque atherectomy without the need for secondary insertion of an aspiration device, greatly improving work efficiency and reducing patient pain, thereby solving the problems raised in the background art.

[0006] (II) Technical solutions

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a guide tube and a cutting tube are provided, the cutting tube is arranged below the guide tube, a connecting mechanism is arranged between the end of the guide tube and the end of the cutting tube close to each other, the guide tube and the cutting tube are connected by the connecting mechanism, a micro dual-shaft motor is installed inside the lower end of the cutting tube, a cutting knife is fixedly sleeved on the output end of the lower side of the micro dual-shaft motor, a cavity is formed on one side of the cutting tube, a suction inlet is formed on the lower end of the cavity, a fixed shell is fixedly arranged on the inner wall of one side of the middle end of the cutting tube, a piston is slidably arranged in the fixed shell, a first through hole is formed on the side of the fixed shell close to the cavity, a second through hole is formed on the side wall of the cavity corresponding to the first through hole, and a transmission mechanism is arranged on the output end of the upper side of the micro dual-shaft motor to drive the piston to reciprocate.

[0008] Preferably, the transmission mechanism comprises a rotating disc and a movable frame, the middle end of the rotary cutting tube is fixedly provided with two side plates on the side away from the fixed shell, a transmission rod is rotatably arranged between the two side plates, the rotating disc is fixedly sleeved on the upper end of the transmission rod, a round pin is eccentrically arranged on the upper surface of the rotating disc, a sliding rod is fixedly arranged on the side of the piston close to the round pin, one end of the sliding rod extends to the outer wall of the fixed shell, the movable frame is fixedly arranged on the outer side of one end of the sliding rod, the upper end of the round pin penetrates through the movable frame, the lower end of the transmission rod is fixedly sleeved with a first gear, the output end on the upper side of the micro double-shaft motor is fixedly sleeved with a second gear, and the first gear is in meshing connection with the second gear.

[0009] Preferably, a first shaft pin is rotatably arranged in the inner part of the cavity and on the upper side of the second through hole, a first baffle is fixedly sleeved on the rod wall of the first shaft pin, a second shaft pin is rotatably arranged in the inner part of the cavity and on the lower side of the second through hole, a second baffle is fixedly sleeved on the rod wall of the second shaft pin, and fixed blocks are fixedly arranged on the inner wall of the side of the cavity away from the second through hole and on the lower sides of the first baffle and the second baffle.

[0010] Preferably, the connecting mechanism comprises limiting blocks and iron blocks, the two limiting blocks are fixedly arranged on the two sides of the upper end of the rotary cutting tube, limiting grooves are formed on the lower ends of the two sides of the guide pipe, the limiting blocks are clamped with the corresponding limiting grooves, clamping grooves are formed on one side of the upper end of the limiting groove, the iron blocks are slidably arranged on the upper side of the limiting block, the iron blocks are clamped with the clamping grooves, electromagnets are fixedly arranged between the two clamping grooves, the electromagnets are magnetically connected with the two iron blocks, sliding grooves are formed on the upper side of the limiting block, horizontal rods are fixedly arranged on the inner wall of the sliding groove, connecting blocks are movably sleeved on the rod wall of the horizontal rod, and one side of the connecting block is fixedly connected with the iron block.

[0011] Preferably, springs are movably sleeved on the rod wall of the horizontal rod, one end of the spring is fixedly connected with the connecting block on the side close to the center of the guide pipe, and the other end of the spring is fixedly connected with the inner wall of the sliding groove.

[0012] Preferably, the longitudinal section of the connecting block and the sliding groove is rectangular, and the side wall of the connecting block is in abutment with the inner wall of the sliding groove.

[0013] Preferably, the longitudinal section of the horizontal rod is rectangular.

[0014] Preferably, the inner wall of the second through hole is fixedly provided with a filter screen.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the present application provides a blood vessel cavity plaque rotary cutting and thrombus aspiration integrated device, which has the following beneficial effects:

[0017] 1. This integrated device for endovascular plaque excision and thrombus aspiration uses a miniature dual-axis motor to simultaneously drive the excision blade and the transmission rod, enabling simultaneous plaque excision and thrombus aspiration without the need for secondary insertion of equipment. This reduces the operation time by more than 40% and decreases the risk of vascular injury.

[0018] 2. This integrated device for plaque excision and thrombus aspiration within the vascular cavity forms a one-way valve structure through a first and second baffle within the cavity. When the piston aspirates, the second baffle opens and the first baffle closes to prevent thrombus backflow into the blood vessel; when the piston resets, the first baffle opens and the second baffle closes to ensure continuous negative pressure and improve aspiration efficiency.

[0019] 3. This integrated device for endovascular plaque excision and thrombus aspiration uses an electromagnet to limit the guide tube and the excision tube. After power is cut off, a spring pushes the iron block out of the slot, allowing for quick separation and replacement of the excision head. It is suitable for different lesion types (such as hard plaques and soft thrombi) and improves surgical flexibility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the integrated device for intravascular plaque excision and thrombus aspiration proposed in this invention;

[0021] Figure 2 for Figure 1 Enlarged view of part A of the structure;

[0022] Figure 3 for Figure 1 Enlarged view of Part B structure;

[0023] Figure 4 for Figure 2 A three-dimensional view of the transmission mechanism.

[0024] In the diagram: 1. Guide tube; 2. Rotary cutting tube; 3. Iron block; 4. Electromagnet; 5. Dual-axis motor; 6. Rotary cutting blade; 7. Cavity; 8. First shaft pin; 9. First baffle; 10. Second shaft pin; 11. Second baffle; 12. Fixing block; 13. Fixing shell; 14. Piston; 15. Movable frame; 16. Slide rod; 17. Round pin; 18. Side plate; 19. Transmission rod; 20. Turntable; 21. First gear; 22. Spring; 23. Second gear; 24. Limiting block; 25. Connecting block; 26. Crossbar. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please refer to Figures 1-4 The application relates to a blood vessel cavity plaque rotary cutting and thrombus suction integrated device which comprises a guide pipe 1 and a rotary cutting pipe 2, the rotary cutting pipe 2 is arranged below the guide pipe 1, a connecting mechanism is arranged between the close end of the guide pipe 1 and the rotary cutting pipe 2, the guide pipe 1 and the rotary cutting pipe 2 are limitingly connected through the connecting mechanism, a micro double-shaft motor 5 is internally arranged at the lower end of the rotary cutting pipe 2, a rotary cutting knife 6 is fixedly sleeved with the output end of the lower side of the micro double-shaft motor 5, a cavity 7 is formed in one side of the rotary cutting pipe 2, a suction inlet is formed in the lower end of the cavity 7, a fixed shell 13 is fixedly arranged on the inner wall of one side of the middle end of the rotary cutting pipe 2, a piston 14 is slidably arranged in the fixed shell 13, a first through hole is formed in one side of the fixed shell 13 close to the cavity 7, a second through hole is formed in the side wall of the cavity 7 and corresponds to the first through hole, and a transmission mechanism for driving the piston 14 to reciprocate is arranged on the output end of the upper side of the micro double-shaft motor 5.

[0027] The transmission mechanism comprises a rotating disc 20 and a movable frame 15, two side plates 18 are fixedly arranged at the middle end of the rotary cutting pipe 2 and located on the side away from the fixed shell 13, a transmission rod 19 is rotatably arranged between the two side plates 18, the rotating disc 20 is fixedly sleeved with the upper end of the transmission rod 19, a round pin 17 is eccentrically arranged on the upper surface of the rotating disc 20, a sliding rod 16 is fixedly arranged on the side of the piston 14 close to the round pin 17, one end of the sliding rod 16 extends to the outer wall of the fixed shell 13, the movable frame 15 is fixedly arranged on the outer side of one end of the sliding rod 16, the upper end of the round pin 17 penetrates through the movable frame 15, a first gear 21 is fixedly sleeved with the lower end of the transmission rod 19, a second gear 23 is fixedly sleeved with the output end of the upper side of the micro double-shaft motor 5, and the first gear 21 is meshingly connected with the second gear 23.

[0028] A first shaft pin 8 is rotatably arranged in the inner portion of the cavity 7 and located on the upper side of the second through hole, a first baffle 9 is fixedly sleeved with the rod wall of the first shaft pin 8, a second shaft pin 10 is rotatably arranged in the inner portion of the cavity 7 and located on the lower side of the second through hole, a second baffle 11 is fixedly sleeved with the rod wall of the second shaft pin 10, and fixed blocks 12 are fixedly arranged on the inner wall of the side of the cavity 7 away from the second through hole and located on the lower side of the first baffle 9 and the second baffle 11.

[0029] The connecting mechanism comprises limit blocks 24 and iron blocks 3, the two limit blocks 24 are fixedly arranged on the two sides of the upper end of the rotary cutting pipe 2, limit grooves are formed in the two sides of the lower end of the guide pipe 1, the limit blocks are clamped with the corresponding limit grooves, clamping grooves are formed in the upper end of the limit grooves, the iron blocks 3 are slidably arranged on the upper side of the limit blocks, the iron blocks 3 are clamped with the clamping grooves, electromagnets 4 are fixedly arranged between the two clamping grooves, the electromagnets 4 are magnetically connected with the two iron blocks 3, sliding grooves are formed in the upper side of the limit blocks, horizontal rods 26 are fixedly arranged on the inner wall of the sliding grooves, connecting blocks 25 are movably sleeved with the rod walls of the horizontal rods 26, and one side of the connecting blocks 25 is fixedly connected with the iron blocks 3.

[0030] The rod wall of the crossbar 26 movably sleeved with a spring 22, one end of the spring 22 fixedly connected with the connecting block 25 near the side of the guide tube 1 center, the other end of the spring 22 fixedly connected with the inner wall of the sliding groove, facilitating the resetting of the connecting block 25.

[0031] The longitudinal section of the connecting block 25 and the sliding groove is rectangular, the side wall of the connecting block 25 abuts against the inner wall of the sliding groove, so that the connecting block 25 can stably slide in the sliding groove.

[0032] The longitudinal section of the crossbar 26 is rectangular, so that the sliding rod 16 cannot rotate, that is, can stably slide.

[0033] The inner wall of the second through hole is fixedly provided with a filter screen, so as to prevent the thrombus from entering the fixed shell 13 as much as possible.

[0034] In summary, the blood vessel intraluminal plaque and thrombus aspiration integrated device is assembled by the guide tube 1 and the rotary cutting tube 2 through the connecting mechanism when in use: the electromagnet 4 is powered to generate magnetism, the iron block 3 is attracted to compress the spring 22, the iron block 3 is clamped into the clamping groove of the guide tube 1, the limiting block is limited in the limiting groove to limit the radial rotation, and the stable connection of the two is completed.

[0035] During the operation, the device is sent into the blood vessel lesion site along the guide wire, and the miniature double-shaft motor 5 is started: the lower output end drives the rotary cutter 6 to rotate at high speed to directly cut the plaque in the blood vessel lumen; the upper output end drives the transmission rod 19 and the rotating disc 20 to rotate through the meshing transmission of the second gear 23 and the first gear 21, the eccentric circular pin 17 on the rotating disc 20 slides in the movable frame 15 to push the sliding rod 16 to drive the piston 14 to reciprocate in the fixed shell 13.

[0036] When the piston 14 moves to the left, a negative pressure is formed in the fixed shell 13, the second baffle 11 in the cavity 7 is rotated to open under the action of the negative pressure around the second shaft pin 10, the first baffle 9 is kept closed under the limiting of the fixed block 12, the thrombus and plaque debris enter the cavity 7 through the suction port, and are sucked into the fixed shell 13 through the second through hole and the first through hole; when the piston 14 moves to the right, the second baffle 11 is reset to close, the first baffle 9 is rotated to open around the first shaft pin 8, the debris is pushed by the piston to move to the side close to the guide tube 1, and the collection is completed at the upper part of the cavity; after the operation is completed, the guide tube 1 and the rotary cutting tube 2 are separated, so that the upper end of the cavity is exposed, and then the large debris can be taken out.

[0037] If the rotary cutter 6 needs to be replaced, the power supply of the electromagnet 4 is disconnected, the spring 22 pushes the connecting block 25 to move along the crossbar 26, the iron block 3 is separated from the clamping groove, the guide tube 1 and the rotary cutting tube 2 are separated, and after replacement, the power is reconnected to attract, the rectangular sliding rod and the connecting block ensure that each component moves stably, avoid shaking during operation, and improve the safety of the operation.

[0038] It is to be understood that the terminology "including", "comprising", or other derivatives from the term "contain" are inclusive and that, in addition to the stated combinations, other combinations are also contemplated. It is to be further understood that the term "comprising" or "comprises" does not exclude other elements being present in addition to those listed. It is to be further understood that the term "including" or "includes" does not exclude other elements being present in addition to those listed.

[0039] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application is defined with respect to the appended claims.

Claims

1. A device for integrated rotational atherectomy and thrombus aspiration in a blood vessel lumen, comprising a guide tube (1) and a rotational atherectomy tube (2), characterized in that: The rotary cutting pipe (2) is arranged below the guide pipe (1), a connecting mechanism is arranged between the end close to the guide pipe (1) and the rotary cutting pipe (2), the guide pipe (1) and the rotary cutting pipe (2) are limit connected through the connecting mechanism, a micro double-shaft motor (5) is internally arranged at the lower end of the rotary cutting pipe (2), a rotary cutting knife (6) is fixedly sleeved on the output end of the lower side of the micro double-shaft motor (5), a cavity (7) is formed on one side of the rotary cutting pipe (2), a suction inlet is formed at the lower end of the cavity (7), a fixed shell (13) is fixedly arranged on the inner wall of one side of the middle end of the rotary cutting pipe (2), a piston (14) is slidably arranged in the fixed shell (13), a first through hole is formed on the side of the fixed shell (13) close to the cavity (7), a second through hole is formed in the side wall of the cavity (7) and corresponds to the first through hole, and a transmission mechanism for driving the piston (14) to reciprocate is arranged on the output end of the upper side of the micro double-shaft motor (5).

2. The device according to claim 1, wherein: The transmission mechanism comprises a rotating disc (20) and a movable frame (15), two side plates (18) are fixedly arranged on the middle end of the rotary cutting pipe (2) and away from the fixed shell (13), a transmission rod (19) is rotatably arranged between the two side plates (18), the rotating disc (20) is fixedly sleeved on the upper end of the transmission rod (19), a round pin (17) is eccentrically arranged on the upper surface of the rotating disc (20), a sliding rod (16) is fixedly arranged on the side of the piston (14) close to the round pin (17), one end of the sliding rod (16) extends to the outer wall of the fixed shell (13), the movable frame (15) is fixedly arranged on the outer side of one end of the sliding rod (16), the upper end of the round pin (17) penetrates through the movable frame (15), a first gear (21) is fixedly sleeved on the lower end of the transmission rod (19), a second gear (23) is fixedly sleeved on the output end of the upper side of the micro double-shaft motor (5), and the first gear (21) is in meshing connection with the second gear (23).

3. The rotational atherectomy and thrombus aspiration integrated device of claim 1, wherein: A first shaft pin (8) is rotatably arranged in the cavity (7) and on the upper side of the second through hole, a first baffle (9) is fixedly sleeved on the rod wall of the first shaft pin (8), a second shaft pin (10) is rotatably arranged in the cavity (7) and on the lower side of the second through hole, a second baffle (11) is fixedly sleeved on the rod wall of the second shaft pin (10), and a fixed block (12) is fixedly arranged on the inner wall of the side of the cavity (7) away from the second through hole and on the lower side of the first baffle (9) and the second baffle (11).

4. The rotational atherectomy and thrombus aspiration integrated device of claim 1 wherein: The connecting mechanism comprises limiting blocks (24) and iron blocks (3), both of the limiting blocks (24) are fixedly arranged on both sides of the upper end of the rotary cutting pipe (2), both sides of the lower end of the guide pipe (1) are provided with limiting grooves, the limiting blocks (24) are clamped with the corresponding limiting grooves, the upper end of the limiting groove is provided with a clamping groove on one side, the iron block (3) is slidably arranged on the upper side of the limiting block (24), the iron block (3) is clamped with the clamping groove, the electromagnet (4) is fixedly arranged between the two clamping grooves, the electromagnet (4) is magnetically connected with the two iron blocks (3), the upper side of the limiting block (24) is provided with a sliding groove, the inner wall of the sliding groove is fixedly provided with a cross rod (26), the rod wall of the cross rod (26) is movably sleeved with a connecting block (25), one side of the connecting block (25) is fixedly connected with the iron block (3).

5. The rotational atherectomy and thrombus aspiration device of claim 4, wherein: The rod wall of the cross rod (26) is movably sleeved with a spring (22), one end of the spring (22) is fixedly connected with the connecting block (25) on the side close to the center of the guide pipe (1), the other end of the spring (22) is fixedly connected with the inner wall of the sliding groove.

6. The integrated atherectomy and thrombectomy device of claim 4, wherein: The longitudinal section of the connecting block (25) and the sliding groove is rectangular, the side wall of the connecting block (25) is in contact with the inner wall of the sliding groove.

7. The integrated atherectomy and thrombectomy device of claim 4, wherein: The longitudinal section of the cross rod (26) is rectangular.

8. The integrated atherectomy and thrombectomy device of claim 1, wherein: The inner wall of the second through hole is fixedly provided with a filter screen.

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