Pintle drive device and pintle extraction system

Abstract

The application provides a broken bolt driving handle, a broken bolt driving device and a broken bolt taking system; the broken bolt driving handle comprises a linkage assembly and a handle assembly; the linkage assembly comprises rotatably connected input and output terminals, the input terminal is engaged with the output terminal, and the transmission ratio of the input terminal to the output terminal is greater than 1; the distal end of the handle assembly is connected to the input terminal and can drive the output terminal to rotate through the input terminal; the output terminal is used for mounting a broken bolt assembly to drive the broken bolt assembly to rotate. Since the rotation speed of the output terminal is lower than that of the input terminal when the input terminal drives the output terminal to rotate, the broken bolt assembly can be slowed down after being docked with the output terminal, and the lower the rotation speed of the broken bolt assembly, the greater the torque of the broken bolt assembly, so that the broken bolt assembly with greater torque can more easily crush stubborn, larger and harder blood clots, and the risk of being adhered and entangled by viscous blood clot tissues can be reduced.

Description

[0001] The present application claims priority to the Chinese patent application No. CN202110384767.9, filed on April 9, 2021, and entitled "Thrombectomy system, thrombectomy device, thrombus crushing stent and thrombus crushing device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of medical devices, in particular to a thrombus crushing driving device and a thrombus crushing and removing system. BACKGROUND

[0003] Venous thromboembolism (VTE) includes deep vein thrombosis (DVT) and pulmonary embolism (PE).

[0004] Deep vein thrombosis (DVT) is a high-incidence vascular surgery disease, which is mainly caused by abnormal blood clotting in the lower limb veins, resulting in blood return obstruction. Pulmonary embolism has become the third leading cause of cardiovascular disease death. One of the most important risk factors for pulmonary embolism is personal factors, including age, history of VTE, history of tumor, heart and lung failure, congenital or acquired coagulation dysfunction, hormone therapy, etc. Acute pulmonary embolism can cause systemic hypotension and even heart failure, and further cause patient death.

[0005] Therefore, early and rapid and effective removal of thrombus can relieve venous obstruction, effectively prevent pulmonary embolism, protect valve function, and reduce the recurrence rate of thrombus.

[0006] Some thrombus crushing and removing devices generally include a thrombus removing stent for collecting and capturing thrombus, a thrombus crushing stent for crushing thrombus, a delivery tube connected to the thrombus crushing stent, and a motor for driving the delivery tube to rotate circumferentially to crush the thrombus by the thrombus crushing stent. The thrombus crushing stent is located in the thrombus removing stent. The thrombus crushing and removing device provides a new and efficient recanalization treatment method for patients with venous thrombosis. The mechanical thrombectomy operation time is short, and the related complications are few. It is the research hotspot in the field of thrombus treatment at present. However, the existing thrombus crushing and removing device still has unsatisfactory thrombus removing effect for stubborn, large and hard thrombus. The stability of the thrombus crushing stent is poor during the mechanical thrombus crushing process, which causes the thrombus crushing stent and the thrombus removing stent to easily damage the inner wall of the blood vessel. SUMMARY

[0007] In order to solve the problems of the prior art, such as unsatisfactory thrombus crushing and removing effect for stubborn, large and hard thrombus, poor stability of the thrombus crushing stent during the mechanical thrombus crushing process, and easy damage of the thrombus crushing stent and the thrombus removing stent to the inner wall of the blood vessel, the present application discloses a thrombus crushing driving handle, a thrombus crushing driving device and a thrombus crushing and removing system to optimize the structure of the thrombus crushing driving handle in the prior art and improve the thrombus crushing effect.

[0008] According to a first aspect of the present application, the present application provides a broken bolt driving handle, which comprises a linkage assembly and a handle assembly: the linkage assembly comprises a rotationally connected input terminal and an output terminal, the input terminal and the output terminal are in engagement with each other, and the transmission ratio of the input terminal to the output terminal is greater than 1; the handle assembly is distally connected to the input terminal and can drive the output terminal to rotate through the input terminal; the output terminal is used for mounting a broken bolt assembly to drive the broken bolt assembly to rotate.

[0009] According to some embodiments of the present application, the transmission ratio of the input terminal to the output terminal is 3:1.

[0010] According to some embodiments of the present application, the output terminal is exposed to the handle assembly, so that the broken bolt assembly can be mounted through the exposed part of the output terminal.

[0011] According to some embodiments of the present application, the output terminal is provided with a mounting hole in the axial direction thereof, the mounting hole is used for the conveying pipe of the broken bolt assembly to pass through, and the conveying pipe passing through the mounting hole is limited in the circumferential direction of the output terminal.

[0012] According to some embodiments of the present application, in the axial direction of the mounting hole, at least one side of the output terminal is formed with a centering groove in communication with the mounting hole and smoothly transitioned, and the radial dimension of the centering groove gradually decreases in the direction gradually approaching the mounting hole.

[0013] According to some embodiments of the present application, the input terminal is a driving gear, the output terminal is a driven gear, and the two are in gear engagement; the number of teeth of the driving gear is less than the number of teeth of the driven gear, so that the rotation speed of the driven gear is less than the rotation speed of the driving gear.

[0014] According to some embodiments of the present application, the rotation axis of the driving gear, the rotation axis of the driven gear and the length direction of the handle assembly are parallel to each other in pairs.

[0015] According to some embodiments of the present application, the driving gear and the driven gear both have external teeth, and the external teeth of the driving gear are in engagement with the external teeth of the driven gear.

[0016] According to some embodiments of the present application, the input terminal is a driving worm, the output terminal is an externally meshed driven turbine, and the number of worm heads of the driving worm is less than the number of turbine teeth of the driven turbine, so that the rotation speed of the driven turbine is less than the rotation speed of the driving worm.

[0017] According to some embodiments of the present application, the handle assembly comprises a handle body having a mounting cavity; a driving unit arranged in the mounting cavity, the driving unit comprising a driver; a linkage shaft, opposite ends of the linkage shaft being connected to an output end of the driver and an input end of the input terminal respectively, so that the driver can drive the input terminal to rotate through the linkage shaft.

[0018] According to some embodiments of the present application, the linkage shaft comprises a driving shaft, an intermediate flexible shaft and a driven shaft, the driving shaft being connected to the output end of the driver, the driven shaft being connected to the input end of the input terminal, and the intermediate flexible shaft being sleeved with the driving shaft and the driven shaft.

[0019] According to some embodiments of the present application, the driving unit further comprises a circuit board arranged in the mounting cavity, the driver being electrically connected to the circuit board; the circuit board having a processor and a memory, the memory storing a computer program, and the processor being capable of executing the computer program to control the driving speed of the driver to change periodically and continuously.

[0020] According to some embodiments of the present application, the processor is further capable of executing the computer program to control the driver to rotate reversely when the current in the circuit increases sharply.

[0021] According to some embodiments of the present application, the driving unit further comprises a power supply and a control switch, the power supply being arranged in the mounting cavity and electrically connected to the control switch and the circuit board; the control switch being arranged in the handle body and used to control the opening and closing of the driver.

[0022] According to some embodiments of the present application, the linkage assembly further comprises a mounting shell, the mounting shell comprising a linkage box and a mounting pipe, the linkage box and the mounting pipe having inner cavities communicating with each other, the linkage box being exposed to the mounting cavity and having a through hole, and the mounting pipe being connected to a distal end of the handle body; the input terminal and the output terminal being arranged in the linkage box, the linkage shaft being arranged in the mounting pipe, the input terminal being opposite to the inner cavity of the mounting pipe so that a distal end of the linkage shaft is connected to the input terminal, and the output terminal being opposite to the through hole so that the output terminal is exposed at least partially.

[0023] According to some embodiments of the present application, one of an outer wall of the mounting pipe and an inner wall of the handle body is provided with a limiting block, and the other is provided with a limiting slot; the limiting block is clamped in the limiting slot to restrict the axial movement of the mounting pipe relative to the handle body; and the mounting pipe can rotate circumferentially relative to the handle body in the limiting slot through the limiting block.

[0024] According to a second aspect of the present application, the present application provides a broken bolt driving device, which comprises a broken bolt assembly and a broken bolt driving handle; the broken bolt assembly comprises a broken bolt support and a delivery tube, the distal end of the delivery tube being connected to the broken bolt support; the broken bolt driving handle adopts the broken bolt driving handle as described above, and the output terminal of the broken bolt driving handle is connected to the delivery tube to drive the delivery tube to rotate under the driving of the linkage assembly.

[0025] According to some embodiments of the present application, the delivery tube is arranged through and circumferentially limited by the output terminal, and the proximal end of the delivery tube is provided with a mounting head, the outer wall of the mounting head is provided with axially spaced first and second limiting protrusions, and at least one of the first and second limiting protrusions can pass through the output terminal back and forth to limit or release the output terminal between the first and second limiting protrusions.

[0026] According to a third aspect of the present application, the present application provides a broken bolt extraction system, which comprises an outer sheath, an extraction assembly and a broken bolt driving device; the extraction assembly comprises an extraction support and a traction guide tube, the extraction support is a radially collapsible and expandable support structure, the proximal end of the extraction support has an opening, and the distal end is closed; the distal end of the traction guide tube is connected to the extraction support and movably arranged through the outer sheath to be axially movable relative to the outer sheath; the broken bolt driving device adopts the broken bolt driving device as described above, and the delivery tube of the broken bolt assembly in the broken bolt driving device is movably arranged through the traction guide tube and axially movable relative to the traction guide tube; wherein the delivery tube can also rotate circumferentially relative to the traction guide tube under the driving of the linkage assembly to drive the broken bolt support to rotate circumferentially in the internal space of the extraction support.

[0027] According to some embodiments of the present application, the delivery tube can also drive the broken bolt support to completely exit the traction guide tube to aspirate the thrombus in the extraction support through the inner cavity of the traction guide tube.

[0028] From the above technical solutions, it can be seen that the embodiments of the present application have at least the following advantages and positive effects:

[0029] The thrombectomy drive handle of this invention can serve as an independent drive device, used to connect to thrombectomy components of various specifications via a quick-connect interface (the output terminal for mounting the thrombectomy assembly). Because the input and output terminals mesh with each other and the transmission ratio between them is greater than 1, the output terminal rotates at a lower speed than the input terminal when the input terminal drives it. Therefore, when the thrombectomy assembly is connected to the output terminal, the thrombectomy rate can be reduced. A lower rotation speed means a greater torque, which makes it easier to break up stubborn, large, and hard thrombi, and also reduces the risk of entanglement by viscous thrombus tissue. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a thrombus fragmentation and thrombus removal system according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A partial perspective view of the thrombus removal drive system;

[0032] Figure 3 for Figure 1 Schematic diagram of the structure of the break-off bolt drive device;

[0033] Figure 4 for Figure 3 Perspective view of the drive handle;

[0034] Figure 5 A schematic diagram of a diseased portion of the inferior vena cava in the human body;

[0035] Figure 6 for Figure 1 A schematic diagram of the thrombectomy system being inserted into the lesion;

[0036] Figure 7 This is a schematic diagram showing the retrieval stent starting to be released;

[0037] Figure 8 A schematic diagram illustrating the release and adjustment of the thrombectomy stent;

[0038] Figure 9 This is a schematic diagram showing the thrombectomy stent after it has been released.

[0039] Figure 10 A schematic diagram illustrating the separation and collection of intravascular thrombus from a stent for thrombectomy;

[0040] Figure 11 A schematic diagram of the thrombus fragmentation component breaking up thrombi within a thrombectomy stent.

[0041] Figure 12 This is a schematic diagram showing the removal of the puncture fragmentation assembly after the puncture fragmentation is completed;

[0042] Figure 13 schematic view of the aspiration of a thrombus;

[0043] Figure 14 schematic view of the drive handle; Figure 4 perspective view of the drive handle from another angle;

[0044] Figure 15 schematic view of the drive handle; Figure 14 perspective view of the distal end of the linkage assembly;

[0045] Figure 16 schematic view of the drive handle; Figure 14 schematic view of the distal end of the communication assembly;

[0046] Figure 17 schematic view of the drive rate profile of one embodiment of the drive;

[0047] Figure 18 schematic view of the distal end of the drive handle with the mounting shell removed;

[0048] Figure 19 schematic view of the distal end of the drive handle with the mounting shell;

[0049] Figure 20 schematic view of the drive handle; Figure 19 schematic view of the output terminal and the mounting head of the delivery tube proximal end;

[0050] Figure 21 schematic view of the delivery tube proximal end of the thrombus fragmentation assembly and the output terminal of the drive handle;

[0051] Figure 22 schematic view of the drive handle rotating the thrombus fragmentation assembly;

[0052] Figure 23 schematic view of the drive handle of another embodiment;

[0053] Figure 24 schematic view of the drive handle; Figure 23 schematic view of the internal structure of the drive handle.

[0054] The reference signs are explained as follows: 01, inferior vena cava blood vessel; 02, thrombus tissue; 03, guide wire; 04, puncture port; 100, thrombus breaking and removing system; 1, outer sheath tube; 11, sheath tube joint; 12, joint catheter; 121, screw cap; 13, suction needle cylinder; 14, branch catheter; 15, branch switch; 2, thrombus removing assembly; 21, traction catheter; 22, thrombus removing stent; 23, guide head; 3, thrombus breaking assembly; 31, delivery tube; 32, thrombus breaking stent; 33, loading tube; 34, mounting head; 341, first limiting protrusion; 342, second limiting protrusion; 4, driving handle; 40, driving interface; 41, control switch; 42, linkage assembly; 421, input terminal; 422, output terminal; 4221, centering groove; 44, handle assembly; 44a, mounting cavity; 441, handle main body; 441a, first housing; 442, driving unit; 4421, driver; 4422, circuit board; 4424, built-in power supply; 443, linkage shaft; 4431, driving shaft; 4432, intermediate flexible shaft; 4433, driven shaft; 423, mounting shell; 424, linkage box; 4241, through hole; 425, mounting tube; 51, limiting block; 52, limiting groove. DETAILED DESCRIPTION

[0055] For the convenience of understanding the present application, the present application will be described more fully below with reference to the accompanying drawings.

[0056] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0057] For the convenience of description, in the field of intraluminal intervention treatment, the proximal end refers to the end of the instrument used for intervention treatment close to the operator, and the distal end refers to the end of the instrument used for intervention treatment away from the operator.

[0058] The reason why the prior art is not ideal for crushing and removing the stubborn, large and hard thrombus is that the stability of the thrombus crushing stent in the process of mechanical thrombus crushing is poor, which leads to the problem that the thrombus crushing stent and the thrombus removing stent are easy to damage the inner wall of the blood vessel. After research, it is found that the motor of the prior art is coaxially and directly connected with the thrombus crushing stent, and a guide wire cannot be arranged in the thrombus crushing stent to form better support for the thrombus crushing stent and the thrombus removing stent, so that the thrombus crushing stent is not stable enough in the process of rotating the thrombus, thereby leading to the problem that the thrombus crushing stent and the thrombus removing stent are easy to damage the inner wall of the blood vessel. At the same time, the motor directly outputs a high speed and a small torque, the coaxial direct connection between the motor and the thrombus crushing stent leads to a high speed and a small torque of the thrombus crushing stent, and the adaptability is poor, so that the thrombus crushing and removing effect is not ideal for stubborn, large and hard thrombus. In order to solve the above problems, the application provides a thrombus crushing driving handle, a thrombus crushing driving device and a thrombus crushing and removing system.

[0059] Please refer to Figure 1 An embodiment of the application provides a thrombus crushing and removing system 100, which can be used for quickly and more thoroughly removing the intravascular obstructive thrombus to unblock the blood vessel. The thrombus crushing and removing system 100 mainly comprises an outer sheath 1, a thrombus removing assembly 2, a thrombus crushing assembly 3 and a driving handle 4.

[0060] The outer sheath 1 serves as a loading container and is mainly used for accommodating the thrombus removing assembly 2 and the thrombus crushing assembly 3, and is used for pulling or guiding the thrombus removing assembly 2 and the thrombus crushing assembly 3 into the lesion site in the blood vessel to achieve the removal of the thrombus. The thrombus removing assembly 2 is used for collecting and capturing the thrombus attached in the blood vessel, and the driving handle 4 is used for driving the thrombus crushing assembly 3 to crush the thrombus collected and captured in the thrombus removing assembly 2.

[0061] In combination with Figure 1 and Figure 2 The thrombus removing assembly 2 comprises a pulling catheter 21 and an expandable thrombus removing stent 22.

[0062] The pulling catheter 21 is movably arranged in the outer sheath 1 and can move axially relative to the outer sheath 1.

[0063] The thrombus removing stent 22 is arranged at the distal end of the pulling catheter 21 and can be driven by the pulling catheter 21 to move axially in the outer sheath, so that the thrombus removing stent 22 extends out of or shrinks into the outer sheath 1.

[0064] The plug-retrieving stent 22 is a stent structure capable of radial contraction and expansion, so that the plug-retrieving stent 22 can be compressed into the outer sheath tube 1. At the same time, when the plug-retrieving stent 22 extends out of the outer sheath tube 1, the plug-retrieving stent 22 can naturally expand and be attached to the inner wall of the blood vessel. It should be understood that when the plug-retrieving stent 22 extends out of the outer sheath tube 1, the plug-retrieving stent 22 can also not naturally expand, for example, the plug-retrieving system 100 can also be provided with an inner sheath core or a traction guide wire, which is connected to the distal end of the plug-retrieving stent 22 through the inner sheath core or the traction guide wire. An external force is applied to pull the proximal end and the distal end of the plug-retrieving stent 22, so as to control the contraction and expansion of the plug-retrieving stent 22. In this way, when the plug-retrieving stent 22 is deviated from the target release position in the blood vessel, the plug-retrieving stent 22 released in the blood vessel can be fine-tuned to avoid scratching the blood vessel wall during the natural expansion and release of the plug-retrieving stent 22.

[0065] The proximal end of the plug-retrieving stent 22 has an opening, and cooperates with the peripheral wall of the plug-retrieving stent 22 to cut the thrombus, so that the thrombus in the blood vessel enters the internal space of the plug-retrieving stent 22 through the opening. It can be understood that the opening can be provided in multiple and the shape of the opening is not limited. At the same time, the distal end of the plug-retrieving stent 22 is closed, so as to collect and capture the thrombus, and the thrombus is collected in the internal space of the plug-retrieving stent 22. It should be explained that “distal end closed” means that the distal end closed plug-retrieving stent 22 can block the escape of the thrombus, and it does not mean that the distal end of the plug-retrieving stent 22 cannot be passed through by the blood flow after being closed. The mesh structure at the distal end of the plug-retrieving stent 22 can block the escape of the thrombus, which is within the explanation scope of “distal end closed”. The through hole provided at the distal end of the plug-retrieving stent 22 for the guide wire does not affect the explanation of “distal end closed” in the present application. Alternatively, the distal end of the plug-retrieving stent 22 is provided with a capture net structure, which can also be understood as the distal end of the plug-retrieving stent 22 being closed.

[0066] The structure of the plug-retrieving stent 22 is not limited in the present application, and the specific structure of the plug-retrieving stent 22 can be, for example, the plug-retrieving stent 22 described in the priority document with the application number CN 202110384767.9 and the invention name “plug-retrieving system, plug-retrieving device, broken plug stent and broken plug device”. The present application will not be repeated here.

[0067] Reference Figure 2 and Figure 3 The broken plug assembly 3 comprises a delivery tube 31 and an expandable broken plug stent 32.

[0068] The broken thrombus stent 32 is arranged at the distal end of the delivery tube 31, and can be driven by the delivery tube 31 to move axially in the traction catheter 21, so that the broken thrombus stent 32 extends out of the distal end of the traction catheter 21 and is released in the thrombus stent 2, or the broken thrombus stent 32 is retracted into the traction catheter 21, and the broken thrombus stent 32 can also be driven to completely exit the traction catheter 21. At the same time, when the delivery tube 31 rotates circumferentially, the delivery tube 31 can also drive the broken thrombus stent 32 to rotate circumferentially synchronously in the internal space of the expanded thrombus stent 22, so as to cut and crush the thrombus in the thrombus stent 22, and ensure that the large-particle thrombus can be removed.

[0069] The structure of the broken thrombus stent 32 is not limited in the present application, and the specific structure of the broken thrombus stent 32 may, for example, adopt the broken thrombus stent 32 described in the priority document with the application number CN 202110384767.9 and the invention name “thrombus removal system, thrombus removal device, broken thrombus stent and broken thrombus device”. The present application will not be described here.

[0070] In an embodiment, the broken thrombus assembly 3 further comprises a loading tube 33 movably sleeved on the delivery tube, and the loading tube 33 is used for loading the broken thrombus stent 32. The loading tube 33 can be moved to the distal end of the delivery tube 31 and sleeved on the broken thrombus stent 32, so that the broken thrombus stent 32 is accommodated in the loading tube 33.

[0071] When the broken thrombus stent 32 needs to be used, the loading tube 33 can be moved to the proximal end of the delivery tube 31, so that the distal end of the delivery tube 31 and the broken thrombus stent 32 are extended into the traction catheter 21 together for use, and the loading tube 33 stays outside the traction catheter 21. When the broken thrombus stent 32 is used up, the delivery tube 31 and the broken thrombus stent 32 can be completely withdrawn from the traction catheter 21, and the loading tube 33 is sleeved on the broken thrombus stent 32 again, so that the broken thrombus stent 32 can be prevented from contacting the external environment as much as possible.

[0072] The broken thrombus assembly 3 further comprises a mounting head 34 arranged at the proximal end of the delivery tube 31. In other embodiments, the mounting head 34 can also be arranged at other positions of the delivery tube 31, such as the middle part of the delivery tube 31. The delivery tube 31 is fixed to the driving handle 4 through the mounting head 34 arranged at the proximal end thereof, so that the two are combined to form a broken thrombus driving device. The driving handle 4 serves as a power output source (which can be manually driven or electrically driven) and can drive the delivery tube 31 and the broken thrombus stent 32 to rotate circumferentially, so as to complete the cutting and crushing of the thrombus in the thrombus stent 22.

[0073] Reference Figure 3 and Figure 4As shown, the driving handle 4 is detachably arranged at the proximal end of the delivery tube 31. The distal end of the driving handle 4 is provided with a driving interface 40, which is capable of being docked with the mounting head 34 at the proximal end of the delivery tube 31. The driving interface 40 is capable of being rapidly rotated under the driving of a power source (which can be manually driven or electrically driven), thereby driving the mounting head 34 docked with the driving interface 40 to rotate, and further driving the delivery tube 31 and the thrombus crushing stent 32 at the distal end of the delivery tube 31 to rotate circumferentially, so as to cut and crush the thrombus tissue wrapped in the thrombus stent 22. For example, by pressing the control switch 41 arranged on the driving handle 4, the driving interface 40 is started to rotate, thereby driving the thrombus crushing stent 32 to rotate, and cutting and crushing the thrombus tissue wrapped in the thrombus stent 22.

[0074] For the thrombus crushing and removing system 100 of the present application, the delivery tube 31 is also capable of driving the thrombus crushing stent 32 to completely exit the traction catheter 21, so as to suck the thrombus in the thrombus stent 22 through the inner cavity of the traction catheter 21.

[0075] The following will be described in combination with the accompanying drawings. Figures 5 to 13 The working principle of the thrombus crushing and removing system 100 of the present application will be exemplarily described.

[0076] Referring to Fig. 1, Figure 5 As shown, Figure 5 Fig. 1 shows a schematic diagram of the inferior vena cava 01 of a human body. There is thrombus tissue 02 in the inferior vena cava 01. A guide wire 03 is introduced through a puncture port 04 of the femoral vein or the popliteal vein, thereby establishing a surgical access for the thrombus crushing and removing system.

[0077] Referring to Fig. 2, Figure 6 As shown, the guide wire 03 enters the delivery tube from the mounting head 34 and exits from the guide head 23 at the distal end of the thrombus removing assembly 2. The distal end of the thrombus crushing and removing system 100 is introduced into the venous vessel 01 along the guide wire 03 from the puncture port 04, and is gradually forwarded.

[0078] Referring to Fig. 3, Figure 7 As shown, the distal end of the thrombus crushing and removing system 100 is gradually forwarded along the guide wire 03, until the distal end of the outer sheath tube 1 passes through the thrombus tissue 02.

[0079] Referring to Fig. 4, Figure 8 As shown, the proximal end of the outer sheath tube 1 is provided with a sheath tube joint 11 for fixing the proximal end of the outer sheath tube 1. The traction catheter 21 and the joint catheter 12 (the distal end of which is used for fixing the proximal end of the traction catheter 21) are continuously pushed, so that the thrombus stent 22 is extended out of the distal end of the outer sheath tube 1, so that the thrombus stent 22 can be gradually released in the blood vessel. When the proximal end of the thrombus stent 22 is completely extended out of the distal end port of the outer sheath tube 1, the pushing of the traction catheter 21 and the joint catheter 12 is stopped.

[0080] In the process of releasing the thrombus taking stent 22, the delivery tube 31 can be moved axially relative to the traction catheter 21. By pushing the delivery tube 31 to the distal end, the distal end of the delivery tube 31 is abutted against the guide head 23 at the distal end of the thrombus taking stent 22, so as to drive the thrombus taking stent 22 to extend out of the outer sheath tube 1. When the thrombus taking stent 22 is completely extended out of the distal end port of the outer sheath tube 1 at the proximal end, the traction catheter 21 and the joint catheter 12 are fixed, and the delivery tube 31 is withdrawn, so that the thrombus taking stent 22 is completely released in the blood vessel, and the thrombus taking stent 22 is arranged in the blood vessel in a wall-adhering manner.

[0081] It should be noted that in the process of pushing the delivery tube 31 forward, the thrombus breaking stent 32 can extend out of the traction catheter 21 and into the thrombus taking stent 22. In the process of withdrawing the delivery tube 31, the thrombus breaking stent 32 can be compressed into the traction catheter 21 under force. It can be understood that the thrombus taking stent 22 can also be released by fixing the traction catheter 21 and the joint catheter 12 and withdrawing the outer sheath tube 1.

[0082] Reference Figure 9 As shown in FIG. 6, the thrombus taking stent 22 is completely released at the distal end of the thrombus tissue 02.

[0083] Reference Figure 10 As shown in FIG. 7, the thrombus taking system 100 is withdrawn as a whole, that is, the outer sheath tube 1, the traction catheter 21 and the delivery tube 31 are withdrawn as a whole, thereby driving the thrombus taking stent 22 to be withdrawn. By means of the opening at the proximal end of the thrombus taking stent 22 and the stent structure, the thrombus tissue 02 is peeled off from the inner wall of the venous blood vessel 01 and enters the thrombus taking stent 22, and is wrapped and collected by the thrombus taking stent 22 at the distal end.

[0084] Reference Figure 11 As shown in FIG. 8, the delivery tube 31 is pushed forward, so that the thrombus breaking stent 32 reenters the thrombus taking stent 22. The driving interface 40 provided at the distal end of the driving handle 4 is connected to the mounting head 34 at the proximal end of the delivery tube 31. By pressing the control switch 41 provided on the driving handle 4, the driving interface 40 is started to rotate, thereby driving the thrombus breaking stent 32 to rotate, so as to cut and crush the thrombus tissue 02 wrapped in the thrombus taking stent 22.

[0085] Reference Figure 12 As shown in FIG. 9, after the thrombus breaking is completed, the thrombus breaking components 3 such as the thrombus breaking stent 32 and the delivery tube 31 are withdrawn as a whole to the proximal end of the thrombus breaking driving device, and are completely withdrawn from the proximal end of the joint catheter 12. After the thrombus breaking stent 32 is withdrawn from the joint catheter 12, the loading tube 33 is sleeved on the thrombus breaking stent 32, so that the thrombus breaking stent 32 is compressed into the loading tube 33.

[0086] Reference Figure 13As shown, the cap 121 of the proximal end of the rotating joint catheter 12 is compressed to seal the inner ring (not shown in the figure) to close the proximal port of the joint catheter 12. The suction needle cylinder 13 is in communication with the branch catheter 14. By pulling the suction needle cylinder 13, the broken thrombus can be sucked into the suction needle cylinder 13 through the traction catheter 21 and the branch catheter 14. It should be noted that a branch switch 15 is provided between the suction needle cylinder 13 and the branch catheter 14, and the branch switch 15 is used to control whether the branch catheter 14 is in communication with the suction needle cylinder 13. It can be understood that the branch switch 15 can also be used to control whether the branch catheter 14 is in communication with the outside world.

[0087] The above is a brief description of the entire thrombus breaking and removing system 100 of the present application. The principle of the driving handle 4 driving the thrombus breaking assembly 3 to rotate will be described in detail below in combination with specific embodiments.

[0088] Reference Figure 4 and Figure 14 As shown, wherein, Figure 14 is Figure 4 is a perspective view of the thrombus breaking driving handle 4 from another angle. The thrombus breaking driving handle 4 of the embodiments of the present application includes a linkage assembly 42 and a handle assembly 44.

[0089] The linkage assembly 42 is arranged at the distal end of the handle assembly 44, and the linkage assembly 42 includes a rotatingly connected input terminal 421 and an output terminal 422. The input terminal 421 is used to connect a power source, for example, the proximal end of the input terminal 421 can be connected with a power input rod, which can be manually operated to manually input power to realize manual driving. The proximal end of the input terminal 421 can also be directly connected with a motor to realize electric driving. The output terminal 422 is used to connect the mounting head 34 of the proximal end of the delivery tube 31. The handle assembly 44 can drive the output terminal 422 to rotate through the input terminal 421, thereby driving the mounting head 34, the delivery tube 31 and the thrombus breaking support 32 at the distal end to rotate.

[0090] Among them, when the input terminal 421 drives the output terminal 422 to rotate, the rotation speed of the output terminal 422 is less than that of the input terminal 421, which means that the rotation speed of the power input source is reduced under the operation mechanism of the linkage assembly 42. Moreover, the smaller the rotation speed of the output terminal 422 is, the lower the stirring rate of the thrombus breaking assembly 3 connected to the output terminal 422 is, and the lower the rotation speed of the thrombus breaking assembly 3 is, the greater the torque of the thrombus breaking assembly 3 is. The thrombus breaking assembly 3 with greater torque is more likely to crush stubborn, larger and harder thrombus, and can also reduce the risk of being adhered and entangled by viscous thrombus tissue, and increase the safety factor of the operation.

[0091] In an embodiment, the input terminal 421 and the output terminal 422 are engaged with each other, and the transmission ratio of the input terminal 421 and the output terminal 422 is greater than 1. In an embodiment, the transmission ratio of the input terminal 421 and the output terminal 422 is 3:1. The transmission ratio of the input terminal 421 and the output terminal 422 can be understood as the speed ratio between the two, that is, the speed ratio of the input terminal 421 and the output terminal 422. Referring to Figure 15 As shown, the input terminal 421 in the embodiment can be a driving gear, and the output terminal 422 can be a driven gear. The driving gear and the driven gear are gear engaged with each other. The number of teeth of the driving gear is less than the number of teeth of the driven gear, so that the speed of the driven gear is less than the speed of the driving gear. Specifically, the number of teeth of the driving gear in the embodiment is 12, and the number of teeth of the driven gear is 32. The reduction ratio is about 1:3, which can appropriately reduce the speed of the output terminal, thereby increasing the torque of the output terminal 422 driving the broken bolt assembly 3 to rotate. When the number of teeth of the driving gear and the driven gear is specifically set, it can be set according to the target reduction degree.

[0092] It should be noted that, Figure 15 As shown, the driving interface 40 is formed on the driven gear. The driving interface 40 is in the form of a mounting hole formed on the driven gear in the axial direction. The mounting hole is used for the proximal end of the conveying pipe 31 of the broken bolt assembly 3 to pass through, and the conveying pipe 31 passing through the mounting hole can be limited in the circumferential direction of the driven gear, so that the proximal end of the conveying pipe 31 can rotate synchronously with the driven gear. Of course, the form of the driving interface 40 is not limited in the embodiments of the present application. The driving interface 40 can also be a mounting groove, or the driving interface 40 can be a fitting surface (gluing surface, magnetic surface, etc.) that can be fitted with the proximal end of the conveying pipe 31.

[0093] The driving gear and the driven gear are in an external engagement relationship, that is, the driving gear and the driven gear both have external teeth, and the external teeth of the driving gear and the external teeth of the driven gear are engaged. It can be understood that in other embodiments, the driving gear and the driven gear can also be in an internal engagement relationship, that is, the external teeth of the driving gear and the internal teeth of the driven gear are engaged, and the internal engagement structure will be more compact. Based on the fact that the size of the driving gear is smaller than the size of the driven gear, the externally engaged driving gear and the driven gear will release the inner space of the driven gear, so that the setting size of the driving interface 40 will be larger, and the mounting head 34 of the proximal end of the conveying pipe 31 can be easily connected to the driving interface 40 through the driving interface 40.

[0094] It should be noted that the driving gear and the driven gear can be engaged in the form of helical gears, so as to increase the engagement effect of the driving gear and the driven gear and reduce the working noise. In addition, at least one intermediate gear can be arranged between the driving gear and the driven gear as a transmission.

[0095] In an embodiment, the rotation axis of the driving gear, the rotation axis of the driven gear and the length direction of the handle assembly 44 are parallel to each other in pairs. In this way, the operation habit of the doctor in the intervention surgery pushing the catheter can be met.

[0096] With reference to Figure 14 The handle assembly 44 can drive the output terminal 422 to rotate through the input terminal 421. The handle assembly 44 includes a handle body 441, a driving unit 442 and a linkage shaft 443. The handle body 441 has a mounting cavity 44a for mounting the driving unit 442, the linkage shaft 443 and other components. The handle body 441 serves as a structural body for the hand of the operator to hold during use, thereby facilitating the operation. The handle body 441 can be injection molded by using ABS or PC and the like, so as to improve the hand feeling and comfort of the user. The appearance of the handle body 441 can be ergonomic to meet the human-computer interaction use requirement.

[0097] In an embodiment, the handle body 441 includes a first shell 441a and a second shell (not shown), and the first shell 441a and the second shell are buckled to form the mounting cavity 44a. For the convenience of description of the structure in the mounting cavity 44a, Figure 14 Only the first shell 441a is shown. The first shell 441a and the second shell are detachably connected, which is more convenient for disassembling the internal components of the driving handle 44 from the assembly process.

[0098] The driving unit 442 includes a driver 4421 and a circuit board 4422. The driver 4421 can be a motor, and the driver 4421 is electrically connected to the circuit board 4422. The circuit board 4422 is used to control the operation of the driver 4421. In the embodiment, the driver 4421 is located at the distal end of the circuit board 4422, so as to connect the output end of the driver 4421 to the input terminal 421. In addition, the circuit board 4422 is located at the proximal end of the driver 4421, so as to connect the circuit board 4422 to an external power supply or a built-in power supply, thereby realizing the power supply of the circuit board 4422 and the driver 4421. The driving unit 442 in the embodiment further includes a built-in power supply 4423, which is arranged in the mounting cavity 44a and located at the proximal end of the circuit board 4422.

[0099] The opposite ends of the linkage shaft 443 are connected to the output end (far end) of the driver 4421 and the input end (near end) of the input terminal 421 respectively, so that the driver 4421 can drive the input terminal 421 to rotate through the linkage shaft 443. In an embodiment, the linkage shaft 443 includes a driving shaft 4431, an intermediate flexible shaft 4432 and a driven shaft 4433, the driving shaft 4431 is connected to the output end of the driver 4421, the driven shaft 4433 is connected to the input end of the input terminal 421, and the intermediate flexible shaft 4432 is sleeved on the driving shaft 4431 and the driven shaft 4433. Among them, the driving shaft 4431 and the driven shaft 4433 can be stainless steel shafts, and the intermediate flexible shaft 4432 can be a silica gel flexible shaft. The intermediate flexible shaft 4432 has the function of a shaft coupling, which can improve the coaxiality requirement of the overall assembly of the driving shaft 4431 and the driven shaft 4433. In order to enhance the connection strength between the shafts, glue can be injected between the two shafts to fix them. It should be noted that in other embodiments, the intermediate flexible shaft 4432 can also be a shaft coupling.

[0100] The circuit board 4422 is integrated with a processor and a memory, and the memory stores a computer program, so that the processor can execute the computer program to control the driver 4421 to rotate according to the preset rule of the computer program. Among them, the driver 4421 can be a motor, and the computer program includes computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to make the computer device execute the steps of driving the driver 4421 to rotate according to the preset rule. In an embodiment, the processor can execute the computer program to control the driving speed of the driver 4421 to change periodically and continuously. The periodic and continuous change can be manifested as the periodic change of the rotation speed of the driver 4421 after starting with time. For example, as shown in the figure, the rotation speed of the driver 4421 directly converts at 80% to 100% of the peak speed, which intuitively represents the acceleration-deceleration of the output shaft of the driver 4421 and the input terminal 421. Among them, the acceleration and deceleration setting of the driver 4421 uses the impact force of speed change to achieve better fragmentation effect. Figure 17

[0101] ​In an embodiment, the processor is further capable of executing the computer program to control the driver 4421 to reverse rotation when the current in the circuit sharply increases. As the broken plug assembly 3 encounters too much resistance or is stuck during operation, the output shaft of the driver 4421 cannot rotate, resulting in a short circuit of the driver 4421, which will cause the current in the circuit to sharply increase. The driving unit 442 will sense the sharp increase of the current in the circuit, thereby controlling the driver 4421 to reverse rotation when the current in the circuit sharply increases. This function can effectively protect the driver 4421 and the vascular tissue in the patient's body, and can quickly and automatically release the stuck failure.

[0102] With reference to Figure 14 , the driving unit 442 further comprises a control switch 41 electrically connected with the circuit board 4422, the control switch 41 is used to control the opening and closing of the driver 4421, and the control switch 41 is arranged on the handle main body 441 and exposed to the mounting cavity 44a for the user to operate and control. The control switch 41 is in the form of a button arranged on the handle main body 441. It can be understood that the control switch 41 can also be a dial key arranged on the handle main body 441, or a touch display screen arranged on the handle main body 441.

[0103] With reference to Figure 15 and Figure 16 , at least part of the structure of the output terminal 422 is exposed to the handle assembly 44, so that the broken plug assembly 3 can be directly mounted through the exposed part of the output terminal 422, and the hand operation is facilitated. The driving interface 40 at the distal end of the handle assembly 44 is formed on the output terminal 422. It can be understood that the driving interface 40 on the output terminal 422 is part of the structure of the output terminal 422, which is exposed to the handle assembly 44 to facilitate the mounting of the mounting head 34 at the proximal end of the delivery tube 31, and the guide wire can pass through. It can be understood that the output terminal 422 can also be arranged in the handle assembly 44, and the driving interface 40 can also not be exposed to the handle assembly 44. For the case that the output terminal 422 is arranged in the handle assembly 44, the handle main body 441 can be provided with a hole for the guide wire and the delivery tube 31 to pass through, so as to facilitate the passing of the guide wire and the mounting of the delivery tube 31.

[0104] In order to avoid the input terminal 421 and the output terminal 422 being directly exposed to the air, and to facilitate the disassembly and fixation of the input terminal 421 and the output terminal 422, the linkage assembly 42 of the present application further comprises a mounting shell 423, wherein, Figure 15 shows the internal view of the mounting shell 423 without the distal end shell cover, Figure 16As shown in FIG. 6, the mounting shell 423 has a distal end shell cover, and the mounting shell 423 is connected to the distal end of the handle main body 441. The mounting shell 423 has a receiving cavity 4231 for mounting the input terminal 421 and the output terminal 422, and the input terminal 421 and the output terminal 422 can rotate relative to the mounting shell 423.

[0105] Referring to Figure 18 and Figure 19 As shown in FIG. 6, the mounting shell 423 has a distal end shell cover, and the mounting shell 423 is connected to the distal end of the handle main body 441. The mounting shell 423 has a receiving cavity 4231 for mounting the input terminal 421 and the output terminal 422, and the input terminal 421 and the output terminal 422 can rotate relative to the mounting shell 423.

[0106] The outer wall of the mounting tube 425 and the inner wall of the handle main body 441 are provided with a limiting block 51 and a limiting groove 52. In the embodiment, the limiting block 51 is arranged on the mounting tube 425, and the limiting groove 52 is arranged on the handle main body 441. The limiting block 51 is clamped in the limiting groove 52 to limit the axial movement of the mounting tube 425 relative to the handle main body 441, and the mounting tube 425 can rotate relative to the handle main body 441 in the limiting groove 52 through the limiting block 51. The mounting tube 425 that cannot move axially can ensure that the position of the mounting shell 423 relative to the handle main body 441 is fixed, so that the mounting shell 423 carrying the broken bolt assembly 3 can be prevented from being separated from the handle main body 441 when the output terminal 422 drives the broken bolt assembly 3 to rotate, and the safety factor of the operation is improved. In addition, the mounting tube 425 can rotate relative to the handle main body 441 in the limiting groove 52 through the limiting block 51, so that the orientation of the side where the output terminal 422 is located can be adjusted according to the actual application environment and use requirements, thereby facilitating the docking of the mounting head 34 at the proximal end of the delivery tube 31 of the broken bolt assembly 3 to the output terminal 422.

[0107] Referring to Figure 20As shown, the delivery tube 31 is threaded through the output terminal 422 and is circumferentially limited by the output terminal 422, so that the output terminal 422 can drive the delivery tube 31 to rotate synchronously. In order to realize the synchronous rotation of the output terminal 422 driving the delivery tube 31, the driving interface 40 is provided as a non-circular mounting hole (labeled 40 in the figure) in this embodiment. In an embodiment, the cross-sectional shape of the mounting hole is a polygon, for example, a regular hexagon, and at this time, the cross-sectional shape of the mounting head 34 on the delivery tube 31 for fitting the mounting hole is also provided as a regular hexagon.

[0108] The outer wall of the mounting head 34 at the proximal end of the delivery tube 31 is provided with axially spaced first limiting protrusions 341 and second limiting protrusions 342, and the first limiting protrusions 341 are closer to the distal end of the delivery tube 31 than the second limiting protrusions 342. At least one of the first limiting protrusions 341 and the second limiting protrusions 342 can pass through the mounting hole of the output terminal 422 back and forth against resistance, so as to limit or release the output terminal 422 between the first limiting protrusions 341 and the second limiting protrusions 342.

[0109] Figure 21 A schematic diagram of mounting the mounting head 34 on the output terminal 422 is shown. For ease of understanding, the following will be described in combination with Figure 20 and Figure 21 for each embodiment.

[0110] When both the first limiting protrusions 341 and the second limiting protrusions 342 can pass through the mounting hole of the output terminal 422 back and forth against resistance, in order to connect the delivery tube 31 of the broken bolt assembly 3 with the output terminal 422, the distal end of the delivery tube 31 can be threaded from the proximal end side of the mounting hole and pass to the distal end of the mounting hole before the interventional operation, so that the first limiting protrusions 341 at the proximal end of the delivery tube 31 overcome the resistance to pass through the mounting hole of the output terminal 422, and then the first limiting protrusions 341 and the second limiting protrusions 342 are located on opposite sides of the mounting hole, at this time, the mounting head 34 is mounted on the output terminal 422. Of course, the proximal end of the delivery tube 31 can also be threaded from the distal end side of the mounting hole and pass to the proximal end of the mounting hole before / after the interventional operation, so that the second limiting protrusions 342 at the proximal end of the delivery tube 31 overcome the resistance to pass through the mounting hole of the output terminal 422, and then the first limiting protrusions 341 and the second limiting protrusions 342 are located on opposite sides of the mounting hole.

[0111] When the first limiting protrusion 341 can overcome the resistance to pass through the mounting hole of the output terminal 422 back and forth, and the second limiting protrusion 342 cannot overcome the resistance to pass through the mounting hole of the output terminal 422 back and forth, in order to connect the delivery tube 31 of the embolus fragmentation assembly 3 with the output terminal 422, the distal end of the delivery tube 31 can be inserted from the proximal side of the mounting hole to the distal side of the mounting hole before the interventional operation, so that the first limiting protrusion 341 at the proximal end of the delivery tube 31 can overcome the resistance to pass through the mounting hole of the output terminal 422, and then the first limiting protrusion 341 and the second limiting protrusion 342 are located on opposite sides of the mounting hole.

[0112] When the second limiting protrusion 342 can overcome the resistance to pass through the mounting hole of the output terminal 422 back and forth, and the first limiting protrusion 341 cannot overcome the resistance to pass through the mounting hole of the output terminal 422 back and forth, in order to connect the delivery tube 31 of the embolus fragmentation assembly 3 with the output terminal 422, the proximal end of the delivery tube 31 can be inserted from the distal side of the mounting hole to the proximal side of the mounting hole before / after the interventional operation, so that the second limiting protrusion 342 at the proximal end of the delivery tube 31 can overcome the resistance to pass through the mounting hole of the output terminal 422, and then the first limiting protrusion 341 and the second limiting protrusion 342 are located on opposite sides of the mounting hole.

[0113] It should be noted that the above limiting protrusion can be a protruding point on the outer surface of the mounting head 34, or a protruding ring on the outer surface of the mounting head 34. When the limiting protrusion can overcome the resistance to pass through the mounting hole of the output terminal 422 back and forth, the hole wall of the mounting hole or the limiting protrusion in contact with the hole wall can be considered to be capable of elastic deformation, and the limiting protrusion can be made of elastic material. After the embolus fragmentation work is completed, if it is necessary to unlock the embolus fragmentation assembly 3 from the output terminal 422, only a proper increase in pulling force towards the side where the limiting protrusion capable of overcoming the above resistance is needed to make the output terminal 422 and the mounting head 34 at the proximal end of the delivery tube 31 disconnected.

[0114] In addition, continuing to refer to Figure 20 In an embodiment, the first limiting protrusion 341 and the second limiting protrusion 342 are spaced apart in the axial direction of the delivery tube 31 by a distance greater than the depth of the mounting hole in the axial direction, which means that the delivery tube 31 can move / shift a small distance in the axial direction relative to the output terminal 422. The movement / shift can be generated by vibration, and the small distance movement / shift can be performed simultaneously with the rotation of the output terminal 422 driving the delivery tube 31, so that the movement / shift of the delivery tube 31 in the axial direction and the rotation of the delivery tube 31 in the circumferential direction can drive the embolus support 32 at the distal end of the delivery tube 31 to move / rotate in the axial direction and the circumferential direction simultaneously. The relative movement of the embolus support 32 in the axial direction and the circumferential direction in the manner of cutting the embolus can have higher efficiency and success rate in cutting and fragmenting the embolus than the cutting of the embolus only in the axial direction and the circumferential direction, which does not simply depend on the cutting force of the embolus support 32 in the axial direction and the circumferential direction.

[0115] In an embodiment, in the axial direction of the mounting hole, the output terminal 422 is formed with a centering groove 4221 in communication with the mounting hole and smoothly transitioned on at least one of the two sides, and the radial dimension of the centering groove 4221 gradually decreases in the direction gradually approaching the mounting hole. The groove surface of the centering groove 4221 can be a plurality of inclined slopes or an arc surface. In this embodiment, the proximal end side and the distal end side of the mounting hole are both provided with the centering groove 4221. The centering grooves 4221 on the two sides can serve as a guide during disassembly and assembly due to a certain slope.

[0116] Figure 22 A schematic diagram illustrating the driving handle 4 driving the broken bolt assembly 3 mounted on the output terminal 422 to rotate is shown. Referring to Figure 21 When the broken bolt assembly 3 is mounted in place, the control switch 41 provided on the trigger handle body 441 can be actuated to rotate the broken bolt assembly 3 and complete the cutting of the thrombus in the blood vessel.

[0117] Figure 23 And Figure 24 is a structural schematic diagram of the driving handle of another embodiment of the application.

[0118] Please refer to Figure 23 And Figure 24 In this embodiment, a worm and gear scheme of the linkage assembly 42 is provided. The driving handle 4 of this embodiment differs in the structure of the linkage assembly 42 provided at the distal end of the driving handle 4.

[0119] In this embodiment, the input terminal 421 is a driving worm, and the output terminal 422 is an externally meshed driven worm. The number of worm heads of the driving worm is less than the number of worm teeth of the driven worm, so that the rotational speed of the driven worm is less than the rotational speed of the driving worm. It needs to be explained that the number of worm heads here refers to the number of helical lines on the worm. If there is one helical line on the worm, it is called a single-head worm. For a single-head worm, the worm rotates one revolution and the worm rotates one tooth. If there are two helical lines on the worm, it is called a double-head worm. For a double-head worm, the worm rotates one revolution and the worm rotates two teeth.

[0120] For the structural design of the worm and gear, the rotation direction of the output terminal 422 can be changed. At this time, the rotation axis of the output terminal 422 is no longer parallel to the rotation axis of the input terminal 421, but perpendicular to each other, so as to change the installation orientation of the broken bolt assembly 3. It can be flexibly selected according to the actual use needs.

[0121] In addition, the mounting shell 423 for mounting the input terminal 421 and the output terminal 422 in the linkage assembly 42 of the embodiment is integrally formed with the handle body 441. It can be understood that in other embodiments, the mounting shell 423 can be detachably connected with the handle body 441 and can rotate relative to the handle body 441 to change the mounting orientation of the output terminal 422, according to the foregoing embodiments.

[0122] Based on the technical solutions described above, the foregoing embodiments of the application have at least the following advantages and beneficial effects:

[0123] The thrombus crushing drive handle 4 of the embodiment of the application can be used as a stand-alone drive device to interface various specifications of the thrombus crushing assembly 3 through the drive interface 40 (the part of the output terminal 422 for mounting the thrombus crushing assembly 3). Since the rotation speed of the output terminal is lower than that of the input terminal when the input terminal drives the output terminal to rotate, the crushing rate of the thrombus crushing assembly 3 can be reduced after the thrombus crushing assembly 3 is interfaced with the output terminal 422, compared with the coaxial direct connection mode. The lower the rotation speed of the thrombus crushing assembly 3 is, the greater the torque of the thrombus crushing assembly 3 is, and the thrombus crushing assembly 3 with greater torque is more likely to crush stubborn, large and hard thrombi, and can also reduce the risk of being adhered and entangled by viscous thrombus tissue, improve the safety factor of the operation, and ensure the success rate of the operation. At the same time, the non-coaxiality of the linkage assembly 42 can meet the transmission effect of the thrombus crushing assembly 3, and at the same time, a cavity for the guide wire to pass through the thrombus crushing and thrombus removing system 100 is manufactured, which has a good guiding and stabilizing effect on the thrombus crushing assembly 3 and the thrombus removing assembly 2, and is beneficial to avoid damage to the blood vessel wall during the thrombus removing and crushing process of the thrombus removing assembly 2 and the thrombus crushing assembly 3, and effectively improve the stability, safety and effectiveness of the thrombus crushing.

[0124] The above-described embodiments only express several embodiments of the application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the application, several modifications and improvements can be made, which are within the scope of protection of the application. Therefore, the protection scope of the patent application of the application should be subject to the appended claims.

Claims

1. A plug fragment drive device, characterized by The application relates to a broken plug assembly, a broken plug driving handle and a linkage assembly. The broken plug assembly comprises a broken plug support and a delivery pipe, and the distal end of the delivery pipe is connected with the broken plug support. The broken plug driving handle comprises: The linkage assembly comprises a rotationally connected input terminal and an output terminal, the input terminal and the output terminal are in meshing connection with each other, and the transmission ratio of the input terminal to the output terminal is greater than 1; and The handle assembly is connected with the distal end of the input terminal and can drive the output terminal to rotate through the input terminal; the output terminal is connected with the delivery pipe to drive the broken plug assembly to rotate. The output terminal is provided with a mounting hole in the axial direction, the proximal end of the delivery pipe is provided with a mounting head, the mounting head is arranged in the mounting hole and is limited in the circumferential direction of the output terminal, the outer wall of the mounting head is provided with axially spaced first and second limiting protrusions, at least one of the first and second limiting protrusions can pass through the mounting hole back and forth to limit or release the output terminal between the first and second limiting protrusions, and the distance between the first and second limiting protrusions in the axial direction of the delivery pipe is greater than the depth of the mounting hole.

2. The plug driving device according to claim 1, wherein The transmission ratio of the input terminal to the output terminal is 3:

1.

3. The plug driving device according to claim 1, wherein The output terminal is exposed to the handle assembly, so that the broken plug assembly can be installed through the exposed part of the output terminal.

4. The plug driving device according to claim 1, wherein In the axial direction of the mounting hole, at least one side of the output terminal forms a centering groove in communication with the mounting hole and smoothly transitions, and the radial dimension of the centering groove gradually decreases in the direction gradually approaching the mounting hole.

5. The plug driving device according to claim 1, wherein The input terminal is a driving gear, the output terminal is a driven gear, and the two are in gear meshing connection; the number of teeth of the driving gear is less than that of the driven gear, so that the rotating speed of the driven gear is less than that of the driving gear.

6. The plug driving device according to claim 5, wherein The rotating axes of the driving gear and the driven gear and the length direction of the handle assembly are parallel to each other in pairs.

7. The plug driving device according to claim 5, wherein The driving gear and the driven gear both have external teeth, and the external teeth of the driving gear are in meshing connection with the external teeth of the driven gear.

8. The plug driving device according to claim 1, wherein The input terminal is a driving worm, the output terminal is an externally meshed driven turbine, the number of worm heads of the driving worm is less than the number of turbine teeth of the driven turbine, so that the rotating speed of the driven turbine is less than that of the driving worm.

9. The plug driving device according to claim 1, wherein The handle assembly comprises: A handle body has a mounting cavity; A driving unit is arranged in the mounting cavity, and the driving unit comprises a driver; A linkage shaft is connected with the output end of the driver and the input end of the input terminal at opposite ends, so that the driver can drive the input terminal to rotate through the linkage shaft.

10. The plug driving device according to claim 9, wherein The linkage shaft comprises a driving shaft, an intermediate flexible shaft and a driven shaft, the driving shaft is connected with the output end of the driver, the driven shaft is connected with the input end of the input terminal, and the intermediate flexible shaft is sleeved with the driving shaft and the driven shaft.

11. The plug driving device according to claim 9, wherein The driving unit further comprises a circuit board, the circuit board is arranged in the mounting cavity, and the driver is electrically connected with the circuit board. The circuit board has a processor and a memory, the memory stores a computer program, and the processor can execute the computer program to control the driving speed of the driver to periodically and continuously change.

12. The plug driving device according to claim 11, wherein The processor can also execute the computer program to control the driver to reverse rotation when the current in the circuit sharply increases.

13. The plug driving device according to claim 11, wherein The driving unit further comprises a power supply and a control switch, the power supply is arranged in the mounting cavity and electrically connected with the control switch and the circuit board; the control switch is arranged on the handle body and used to control the opening and closing of the driver.

14. The plug driving device according to claim 9, wherein The linkage assembly further comprises a mounting shell, the mounting shell comprises a linkage box and a mounting pipe, the inner cavities of the linkage box and the mounting pipe are connected with each other, the linkage box is exposed to the mounting cavity and is provided with a through hole, and the mounting pipe is connected with the distal end of the handle body. The input terminal and the output terminal are arranged in the linkage box, the linkage shaft is arranged in the mounting pipe, the input terminal is opposite to the inner cavity of the mounting pipe, so that the distal end of the linkage shaft is connected with the input terminal, and the output terminal is opposite to the through hole and at least partially exposed.

15. The plug driving device according to claim 14, wherein One of the outer wall of the mounting pipe and the inner wall of the handle body is provided with a limiting block, and the other is provided with a limiting groove. The limiting block is clamped in the limiting groove to limit the axial movement of the mounting pipe relative to the handle body; and the mounting pipe can rotate relative to the handle body in the limiting groove in the circumferential direction through the limiting block.

16. A broken bolt extraction system, comprising: It comprises: An outer sheath tube; A thrombus extraction assembly comprising a thrombus extraction stent and a traction catheter, the thrombus extraction stent is a stent structure capable of being radially contracted and expanded, the proximal end of the thrombus extraction stent is provided with an opening, and the distal end is closed; the distal end of the traction catheter is connected with the thrombus extraction stent and movably arranged in the outer sheath tube to be axially movable relative to the outer sheath tube; The delivery tube is movably arranged in the traction catheter and axially movable relative to the traction catheter; The delivery tube can also rotate relative to the traction catheter in the circumferential direction under the driving of the linkage assembly to drive the thrombus extraction stent to rotate in the circumferential direction in the inner space of the thrombus extraction stent.

17. The plug removal system of claim 16, wherein, The delivery tube can also drive the thrombus extraction stent to completely exit the traction catheter to suck the thrombus in the thrombus extraction stent through the inner cavity of the traction catheter.

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