Sound wave thrombectomy instrument

Abstract

The invention relates to the technical field of medical instruments, in particular to a sound wave thrombectomy instrument. The invention provides a sound wave thrombectomy instrument which is simple and convenient in thrombectomy mode. A sound wave thrombus extraction instrument comprises a handle, a catheter, a connector, a closure mechanism and a thrombus breaking mechanism, the catheter is connected to the front side of the handle, the connector is installed on the rear side of the lower portion of the catheter, the closure mechanism used for blocking thrombus is arranged on the front side of the catheter, and the thrombus breaking mechanism used for breaking the thrombus is arranged between the connector and the closure mechanism. According to the thrombus breaking device, the breaking rod and the catheter extend into the blood vessel of a patient, the top disc makes contact with the thrombus, the top disc adaptively moves backwards, the energy converter is started, the breaking rod vibrates to break the thrombus, the broken thrombus flows out through the catheter, the breaking effect is achieved, and operation is easy.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an acoustic thrombectomy device. Background Technology

[0002] When a patient experiences vascular damage, changes in blood flow, or blood stasis, a thrombus can form. A thrombus is a blood clot that forms inside a blood vessel. During surgery, doctors use instruments to remove the thrombus from the patient's blood vessels. However, existing instruments require doctors to manually operate them multiple times. If the operation is not performed correctly, it can easily endanger the patient's life. Therefore, it is necessary to design a new instrument.

[0003] Patent application CN110141303B discloses an instrument for breaking up and aspirating thrombi. By selecting a vascular access route to the affected area, a guidewire is advanced along the route. A microcatheter passes through the guidewire, and under its guidance, the distal end of the microcatheter reaches the vascular occlusion. The guidewire is then withdrawn, and a distal burr head integrated on the handle is inserted into the microcatheter. The connecting mandrel is pinched and pushed distally along the vascular access route until the microcatheter and handle form a single unit through a quick-connect interface, aligning the distal burr head with the microcatheter opening. The operator operates the handle to aspirate, and a motor drives the head of the distal burr head to rotate rapidly via the connecting mandrel. The position of the distal burr head can also be adjusted to directly grind up the thrombus. The thrombus within the blood vessel is broken up, aspirated, and collected outside the body. While this instrument breaks up and removes thrombi through the distal burr head, it requires multiple manual operations during use, wasting manpower.

[0004] We designed a simple sonic thrombectomy device to overcome the limitations of existing devices that require multiple manual operations, which is labor-intensive. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a simple ultrasonic thrombectomy device that breaks up thrombi, overcoming the drawbacks of existing devices that require multiple manual operations and consume manpower.

[0006] To achieve the above objectives, the present invention provides the following solution: an acoustic thrombectomy device, comprising:

[0007] The handle and the conduit are connected to the front of the handle;

[0008] Connector; A connector is installed on the rear side of the lower part of the conduit.

[0009] The catheter has a thrombus-blocking mechanism at the front.

[0010] A thrombus fragmentation mechanism is provided between the thrombus fragmentation mechanism, the connector, and the thrombus interception mechanism for breaking up thrombi.

[0011] As an improvement to the above solution, the interception mechanism includes:

[0012] An airbag is attached to the front of the catheter.

[0013] An air delivery tube is connected to the inside of the airbag, and the air delivery tube passes through the duct.

[0014] The air cylinder is connected to the air delivery tube, and the air cylinder is located inside the delivery tube.

[0015] The top plate is slidably connected to the air cylinder for contact with the thrombus.

[0016] As an improvement to the above solution, the thrombus breaking mechanism includes:

[0017] Transducer, with a transducer connected to the connector;

[0018] A connecting rod is attached to the front of the transducer, and the connecting rod is slidably connected to the top plate.

[0019] A fixed plate is attached to the front side of the connecting rod;

[0020] The thrombus breaking rod is uniformly and rotatably connected to the front side of the connecting rod, and the thrombus breaking rod is connected to the middle of the front part of the connecting rod.

[0021] Guide wheel: A guide wheel is installed at the rear of the air cylinder;

[0022] The first pull rope is connected to the top plate, and the first pull rope passes around the guide wheel and connects to the fixed plate.

[0023] As an improvement to the above solution, a positioning mechanism for positioning the catheter is also included, the positioning mechanism comprising:

[0024] A pressure ring is slidably connected to the front side of the catheter;

[0025] The rocker arm and the pressure ring are both evenly and rotatably connected to the rocker arm;

[0026] The top block and the rocker arm are rotatably connected by the top block.

[0027] As an improvement to the above solution, an expansion mechanism for expanding the breaker bar is also included, the expansion mechanism comprising:

[0028] The first spring is connected between the rotating crushing rod and the connecting rod, and the first spring is wound around the rotating crushing rod.

[0029] The second pull rope is connected to the inside of the top plate;

[0030] An expansion disc is connected between the second pull rope and the expansion disc. The rotating crushing rod is slidably connected to the expansion disc, and the expansion disc is slidably connected to the middle crushing rod.

[0031] As an improvement to the above solution, a fixation mechanism for fixing the thrombus is also included, which includes:

[0032] The mounting bracket has four sets of mounting brackets evenly connected to the front side of the top plate.

[0033] Insert rods are rotatably connected between each set of mounting brackets;

[0034] Both the ratchet and the insertion rod are connected to ratchet wheels;

[0035] Each insert rod has a locking block rotatably connected to the mounting bracket on its right side;

[0036] A second spring is connected between the mounting bracket and the locking block that rotates on it, and the second spring is wound around the locking block.

[0037] As an improvement to the above solution, the insertion rod is V-shaped.

[0038] As an improvement to the above solution, a filtration mechanism for thrombi is also included, which includes:

[0039] A retaining ring is connected inside the conduit;

[0040] The filter screen is connected to the inner side of the retaining ring;

[0041] Vibration ring: A vibration ring is connected to the inside of the filter screen.

[0042] The advantages of this invention are: 1. This invention achieves the breaking effect by inserting the breaking rod and catheter into the patient's blood vessel, with the top plate contacting the thrombus, the top plate adaptively moving backward, activating the transducer, and the breaking rod vibrating to break the thrombus. The broken thrombus then flows out through the catheter. The operation is simple.

[0043] 2. The top plate moves backward, the second pull rope pulls the expansion plate backward, the crushing rod opens outward to contact the thrombus, and the first spring twists and deforms, thereby achieving the expansion effect and avoiding poor crushing effect due to excessively large thrombi;

[0044] 3. The thrombus moves backward and contacts the insertion rod, causing the insertion rod to rotate inward, which in turn causes the ratchet to rotate, making the locking block rotate adaptively. After the second spring deforms, it returns to its original position, thus achieving a fixing effect and preventing the thrombus from moving during the fragmentation process. Attached Figure Description

[0045] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0046] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0047] Figure 3 This is a three-dimensional structural diagram of the first part of the interception mechanism of the present invention.

[0048] Figure 4 This is a three-dimensional structural diagram of the second part of the interception mechanism of the present invention.

[0049] Figure 5 This is a three-dimensional structural diagram of the first part of the bolt breaking mechanism of the present invention.

[0050] Figure 6 This is a three-dimensional structural diagram of the second part of the bolt breaking mechanism of the present invention.

[0051] Figure 7 This is a three-dimensional structural diagram of the first part of the positioning mechanism of the present invention.

[0052] Figure 8 This is a three-dimensional structural diagram of the second part of the positioning mechanism of the present invention.

[0053] Figure 9 This is a three-dimensional structural diagram of the expansion mechanism of the present invention.

[0054] Figure 10 This is a three-dimensional structural diagram of the first part of the fixing mechanism of the present invention.

[0055] Figure 11 This is a three-dimensional structural diagram of the second part of the fixing mechanism of the present invention.

[0056] Figure 12 This is a three-dimensional structural diagram of the filtration mechanism of the present invention.

[0057] Figure 13 This is a three-dimensional structural diagram of the filtration mechanism of the present invention.

[0058] The components are as follows: 1-handle, 2-conduit, 3-connector, 4-cutoff mechanism, 41-top plate, 42-air cylinder, 43-airbag, 44-air duct, 5-break-bolt mechanism, 51-transducer, 52-fixed plate, 53-connecting rod, 54-break-rod, 55-first pull rope, 56-guide wheel, 6-positioning mechanism, 61-pressure ring, 62-swing rod, 63-top block, 7-expansion mechanism, 71-second pull rope, 72-expansion plate, 73-first spring, 8-fixing mechanism, 81-mounting bracket, 82-insertion rod, 83-ratchet, 84-locking block, 85-second spring, 9-filtering mechanism, 91-fixed ring, 92-vibration ring, 93-filter screen. Detailed Implementation

[0059] The present invention will now be further described with reference to the accompanying drawings and specific embodiments:

[0060] Example 1

[0061] A sonic thrombectomy device, now referenced Figure 1 and Figure 2 It includes a handle 1, a conduit 2, a connector 3, a flow-stopping mechanism 4, and a plug-breaking mechanism 5. The handle 1 is connected to the front of the conduit 2, the connector 3 is installed on the lower rear side of the conduit 2, the flow-stopping mechanism 4 is provided on the front of the conduit 2, and the plug-breaking mechanism 5 is provided between the connector 3 and the flow-stopping mechanism 4.

[0062] For reference Figures 1-4 The interception mechanism 4 includes a top plate 41, an air cylinder 42, an air bag 43, and an air delivery tube 44. The air bag 43 is connected to the front of the catheter 2. Two air delivery tubes 44 are connected to the inside of the air bag 43. The air delivery tubes 44 pass through the catheter 2. The air cylinder 42 is connected between the two air delivery tubes 44. The air cylinder 42 is located inside the catheter 2. The top plate 41 is slidably connected to the air cylinder 42. The top plate 41 extends into the blood vessel and contacts the thrombus. The top plate 41 moves backward and squeezes the air cylinder 42. The airflow in the air cylinder 42 flows through the air delivery tube 44 into the air bag 43. The air bag 43 inflates and contacts the inner wall of the blood vessel.

[0063] For reference Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 10 The thrombus fragmentation mechanism 5 includes a transducer 51, a fixed plate 52, a connecting rod 53, a fragmentation rod 54, a first pull rope 55, and a guide wheel 56. The transducer 51 is connected to the connector 3. The connecting rod 53 is connected to the front side of the transducer 51. The connecting rod 53 is slidably connected to the top plate 41. The fixed plate 52 is connected to the connecting rod 53. Six fragmentation rods 54 are evenly rotated on the front side of the connecting rod 53. The fragmentation rod 54 is connected to the middle of the front part of the connecting rod 53. There are seven fragmentation rods 54. The guide wheel 56 is installed on the rear side of the air cylinder 42. The first pull rope 55 is connected to the top plate 41. The first pull rope 55 passes around the guide wheel 56 and connects to the fixed plate 52. When the transducer 51 is activated, the fixed plate 52, the connecting rod 53, and the fragmentation rods 54 vibrate. The vibrating fragmentation rods 54 break up the thrombus.

[0064] When it is necessary to treat thrombi in blood vessels, this ultrasonic thrombectomy device can be used. First, the device is installed on the treatment unit via connector 3. After installation, the user holds handle 1 and inserts the crushing rod 54 into the patient's blood vessel. When the top plate 41 and the crushing rod 54 come into contact with the thrombus, the top plate 41 moves backward, compressing the air cylinder 42. This causes the airflow in the air cylinder 42 to flow through the air tube 44 into the air bladder 43, inflating it and thus blocking the thrombus and preventing its movement. The backward movement of the top plate 41 causes the first pull rope 55 to pull the fixing plate 52 forward, which in turn moves the connecting rod 53 forward, causing the crushing rod 54 to move forward. When the device comes into contact with the thrombus, the transducer 51 is activated via connector 3, causing the fixed plate 52, connecting rod 53, and breaking rod 54 to vibrate at a low amplitude and high frequency. The vibrating breaking rod 54 breaks the thrombus, thus achieving the effect of fragmentation. The fragmented thrombus is then discharged through catheter 2, thus achieving the effect of thrombectomy. After thrombectomy, the transducer 51 is deactivated via connector 3, the top plate 41 moves forward adaptively, the air bladder 43 contracts, and the airflow inside the air bladder 43 flows through the air tube 44 into the air cylinder 42. Subsequently, the breaking rod 54 is removed from the patient's blood vessel, and the connector 3 on this ultrasonic thrombectomy device is detached from the treatment host. The connecting rod 53 and breaking rod 54 are moved to a suitable position, and the ultrasonic thrombectomy device is cleaned.

[0065] Example 2

[0066] Based on Example 1, now refer to Figure 1 , Figure 2 , Figure 7 and Figure 8 It also includes a positioning mechanism 6, which includes a pressure ring 61, a swing rod 62, and a top block 63. Two pressure rings 61 are slidably connected to the front side of the catheter 2, and the pressure ring 61 on the rear side contacts the balloon 43. The top plate 41 contacts the pressure ring 61 on the front side. Three swing rods 62 are evenly rotatably connected to each pressure ring 61. There are six swing rods 62. A top block 63 is rotatably connected between two swing rods 62. There are three top blocks 63. When the balloon 43 inflates, the top plate 41 moves backward, causing the pressure ring to move inward. The swing rods 62 and the top block 63 move outward and contact the inner wall of the blood vessel.

[0067] For reference Figure 1 , Figure 2 and Figure 9It also includes an expansion mechanism 7, which includes a second pull rope 71, an expansion disc 72, and a first spring 73. Two first springs 73 are connected between the rotating crushing rod 54 and the connecting rod 53. There are twelve first springs 73, which are wound around the rotating crushing rod 54. Two second pull ropes 71 are connected to the inner side of the top plate 41. An expansion disc 72 is connected between the two second pull ropes 71. The rotating crushing rod 54 is slidably connected to the expansion disc 72, and the expansion disc 72 is slidably connected to the middle crushing rod 54. When the top plate 41 moves backward, the second pull ropes 71 pull the expansion disc 72 backward, and the crushing rod 54 rotates outward to contact the thrombus. The first springs 73 twist and deform.

[0068] For reference Figure 1 , Figure 2 , Figure 10 and Figure 11 It also includes a fixing mechanism 8, which includes a mounting bracket 81, a rod 82, a ratchet 83, a locking block 84, and a second spring 85. Four sets of mounting brackets 81 are evenly connected to the front side of the top plate 41, with each set consisting of two mounting brackets 81. There are eight mounting brackets 81. Each set of mounting brackets 81 is rotatably connected to a rod 82. There are four rods 82, which are V-shaped. Each rod 82 is connected to a ratchet 83. There are four ratchet 83s. Each mounting bracket 81 on the right side of each rod 82 is rotatably connected to a locking block 84. There are four locking blocks 84. The locking blocks 84 are in contact with the ratchet 83. There are four second springs 85 connected between the mounting bracket 81 and the locking blocks 84 rotating on it. The second springs 85 are wrapped around the locking blocks 84. When the thrombus contacts the rod 82, the rod 82 and the ratchet 83 rotate, the locking blocks 84 rotate accordingly, and the second springs 85 deform and reset.

[0069] For reference Figure 2 , Figure 12 and Figure 13 It also includes a filtration mechanism 9, which includes a fixing ring 91, a vibrating ring 92 and a filter screen 93. The fixing ring 91 is connected inside the conduit 2. The filter screen 93 is welded to the inside of the fixing ring 91. The vibrating ring 92 is connected to the inside of the filter screen 93. The connecting rod 53 contacts the vibrating ring 92. The vibration of the connecting rod 53 drives the vibrating ring 92 to vibrate, and the filter screen 93 vibrates to filter the thrombus.

[0070] The inflation of the airbag 43 causes the rear pressure ring 61 to move forward, and the rearward movement of the top plate 41 causes the front pressure ring 61 to move backward, thereby causing the swing arm 62 to rotate and the top block 63 to move outward to contact the patient's blood vessel, thus achieving the positioning effect. After the top plate 41 moves forward and the airbag 43 contracts, during the process of moving the ultrasonic thrombectomy device, the swing arm 62 rotates in the opposite direction and the top block 63 moves inward.

[0071] When the top plate 41 moves backward, the second pull rope 71 pulls the expansion plate 72 backward, which causes the crushing rod 54 to rotate outward, and the first spring 73 to twist and deform, thereby achieving the expansion effect and making the thrombus fragmentation effect better. When the top plate 41 moves forward, the first spring 73 resets and drives the crushing rod 54 to rotate inward, and then the expansion plate 72 moves forward.

[0072] In cases of large thrombi, as the breaking rod 54 rotates outward, the thrombus will come into contact with the insertion rod 82, causing the insertion rod 82 to rotate. This, in turn, causes the ratchet 83 to rotate, which in turn causes the locking block 84 to rotate and then reset. The second spring 85 then twists and deforms and resets. The four insertion rods 82 fix the thrombus, preventing it from moving easily. After the ultrasonic thrombectomy device is removed from the patient's blood vessel, the insertion rod 82 can be manually rotated to the appropriate position. The ratchet 83 rotates, causing the locking block 84 to rotate and reset, and the second spring 85 twists and deforms and resets.

[0073] The vibration of the connecting rod 53 causes the vibration ring 92 to vibrate, which in turn causes the filter screen 93 to vibrate. As the blood containing the fragmented thrombus flows backward in the catheter 2, the thrombus comes into contact with the filter screen 93. The vibrating filter screen 93 filters the thrombus in the blood, keeping the thrombus in front of the filter screen 93, thus achieving the filtering effect and preventing the thrombus from flowing around. When the ultrasonic thrombectomy device is removed from the patient's blood vessel, the thrombus can be shaken out.

[0074] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this invention.

Claims

1. An acoustic thrombectomy device, characterized in that it comprises: Handle (1) and conduit (2), with conduit (2) connected to the front of handle (1); Connector (3) is installed on the lower rear side of the conduit (2); The obstruction mechanism (4) is provided on the front side of the catheter (2) for blocking the thrombus; A thrombus fragmentation mechanism (5) is provided between the thrombus fragmentation mechanism (5), the connector (3), and the thrombus interception mechanism (4) for fragmenting thrombi.

2. The acoustic thrombectomy device according to claim 1, characterized in that, The interception mechanism (4) includes: The airbag (43) is connected to the front of the catheter (2); The air tube (44) is connected to the inside of the air bag (43), and the air tube (44) passes through the duct (2); The air cylinder (42) is connected to the air pipe (44), and the air cylinder (42) is located inside the conduit (2); The top plate (41) is slidably connected to the air cylinder (42) for contact with the thrombus.

3. The acoustic thrombectomy device according to claim 2, characterized in that, The bolt breaking mechanism (5) includes: A transducer (51) is connected to a connector (3); Connecting rod (53), the front side of the transducer (51) is connected to the connecting rod (53), and the connecting rod (53) is slidably connected to the top plate (41); The fixed plate (52) is connected to the front side of the connecting rod (53); The front side of the connecting rod (53) is uniformly rotated and connected to the thrombus breaking rod (54), and the middle of the front part of the connecting rod (53) is connected to the thrombus breaking rod (54). Guide wheel (56), guide wheel (56) is installed on the rear side of air cylinder (42); The first pull rope (55) is connected to the top plate (41). The first pull rope (55) passes around the guide wheel (56) and is connected to the fixed plate (52).

4. The acoustic thrombectomy device according to claim 3, characterized in that, It also includes a positioning mechanism (6) for positioning the catheter (2), the positioning mechanism (6) including: A pressure ring (61) is slidably connected to the front side of the conduit (2); The rocker arm (62) and the pressure ring (61) are both uniformly and rotatably connected to the rocker arm (62); The top block (63) and the swing rod (62) are rotatably connected by the top block (63).

5. The acoustic thrombectomy device according to claim 4, characterized in that, It also includes an expansion mechanism (7) for expanding the breaker bar (54), the expansion mechanism (7) including: The first spring (73) is connected between the rotating crushing rod (54) and the connecting rod (53), and the first spring (73) is wound around the rotating crushing rod (54); The second pull rope (71) is connected to the inner side of the top plate (41); The expansion disc (72) is connected to the second pull rope (71). The rotating crushing rod (54) is slidably connected to the expansion disc (72). The expansion disc (72) is slidably connected to the middle crushing rod (54).

6. The acoustic thrombectomy device according to claim 5, characterized in that, It also includes a fixation mechanism (8) for fixing the thrombus, the fixation mechanism (8) including: Mounting bracket (81), four sets of mounting brackets (81) are evenly connected to the front side of the top plate (41); Insert rod (82), each set of mounting brackets (81) is rotatably connected to insert rod (82); Both the ratchet (83) and the insert (82) are connected to ratchet (83); Locking block (84): A locking block (84) is rotatably connected to the mounting bracket (81) on the right side of each insert (82); Second spring (85): A second spring (85) is connected between the mounting bracket (81) and the locking block (84) rotating thereon, and the second spring (85) is wound around the locking block (84).

7. The acoustic thrombectomy device according to claim 6, characterized in that, The insertion rod (82) is V-shaped.

8. The acoustic thrombectomy device according to claim 6, characterized in that, It also includes a filtration mechanism (9) for thrombus treatment, the filtration mechanism (9) including: A fixing ring (91) is connected inside the conduit (2); A filter screen (93) is connected to the inner side of a retaining ring (91); Vibration ring (92) is connected to the inner side of filter screen (93).

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