CN116407211A

CN116407211A - Bolt breaking device

Info

Publication number: CN116407211A
Application number: CN202111676123.3A
Authority: CN
Inventors: 蒋权杰; 易旺
Original assignee: Hangzhou Wei Qiang Medical Technology Co ltd
Current assignee: Hangzhou Wei Qiang Medical Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-07-11

Abstract

The application provides a thrombolytic device, which comprises a suction catheter, a suction power device and a thrombolytic device. The aspiration catheter has a lumen extending axially through both ends thereof. The suction power device is communicated with the inner cavity of the suction catheter and is used for providing suction power to suck out thrombus impurities in the blood vessel through the suction catheter and accommodating the sucked thrombus impurities through the volume of the suction power device. The thrombus breaker is movably worn in the inner cavity of the suction catheter, and the distal end of the thrombus breaker movably extends out of the distal end of the suction catheter for pushing away or breaking up thrombus impurities blocking the distal end of the suction catheter. The bolt breaking device can achieve efficient bolt breaking.

Description

Bolt breaking device

Technical Field

The application relates to the technical field of medical equipment, in particular to a bolt breaking device capable of efficiently breaking bolts.

Background

Embolization generally refers to the phenomenon of abnormal substances occurring in circulating blood that are insoluble in blood, and travel with the blood stream to occlude the lumen of a blood vessel. Embolisms caused by thrombus shedding are called thromboembolism, one of the most common types of embolism. Currently, it is generally treated with a thrombus aspiration device, such as cutting and pulverizing the thrombus and withdrawing it outside the body through a vacuum. In order to ensure aspiration efficiency and surgical success rate, it should be ensured that the device will not become clogged during aspiration.

Existing thrombus aspiration devices typically include an aspiration catheter and a vacuum pump coupled thereto, the aspiration catheter including a tube, a guard housing disposed outside the tube, and a cutting tool disposed within the guard housing. Because the cutting tool is positioned in the protective shell, the cutting tool is generally at a certain distance from the suction port at the distal end of the suction catheter and cannot move, when the thrombus is blocked at the suction port of the suction catheter due to the fact that the suction port can only continuously suck radially and the cutting tool cannot move in the suction process, the thrombus blocked at the suction port is difficult to remove, so that the thrombus is gradually accumulated, tightly covered and wrapped on the suction port, even the suction port is completely blocked by the thrombus, and the thrombus can be directly blocked on the cutting tool in the suction process, so that the device cannot be used continuously. This not only affects the aspiration speed and efficiency of the aspiration device, but also severely affects the therapeutic effect on the embolism and may even pose a life threat to the patient.

Disclosure of Invention

The patent refers to the field of 'AN_SNparatus for grinding or controlling the flow of water or gas into water'.

In order to achieve the above purpose, the thrombus breaking device provided by the application comprises a suction conduit, a suction power device and a thrombus breaking device. The aspiration catheter has an inner lumen extending axially through both ends thereof. The suction power device is communicated with the inner cavity of the suction catheter and is used for providing suction power to suck out thrombus impurities in blood vessels through the suction catheter and accommodating the sucked thrombus impurities through the volume of the suction power device. The thrombus breaker is movably arranged in the inner cavity of the suction catheter, and the distal end of the thrombus breaker can movably extend out of the distal end of the suction catheter and is used for pushing away or crushing thrombus impurities blocking the distal end of the suction catheter.

In the garrulous bolt device that this application provided, because garrulous bolt ware activity wear in the inner chamber of suction catheter, when thrombus impurity blocks up the distal end of suction catheter, operating personnel can control garrulous bolt ware is in along axial reciprocating motion and/or rotation in the inner chamber of suction catheter, garrulous bolt ware's distal end can stretch out the distal end of suction catheter to will block thrombus impurity at suction catheter distal end pushes away or smashes, can avoid thrombus impurity to block the suction mouth of suction catheter can realize high-efficient garrulous bolt.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic overall structure of a thrombus breaking device according to an embodiment of the present application.

Fig. 2 is a schematic view of the thrombolytic device of fig. 1 in an operational state after the distal end thereof is extended from the distal end of the aspiration catheter.

Fig. 3 is an enlarged schematic view of section III of fig. 2.

Fig. 4 is a cross-sectional view of the connection pipe of fig. 2.

Fig. 5 is a partial cross-sectional view of the connecting tube of fig. 4 with a suction catheter and a thrombolytic rod threaded.

Fig. 6 is a schematic view of the latch breaker of fig. 2.

Fig. 7 is a schematic structural view of a thrombus breaker according to another embodiment of the present application.

Fig. 8 is a schematic view of the thrombolytic device of fig. 7 in an operational state after the distal end thereof is extended from the distal end of the aspiration catheter.

Fig. 9 is a schematic structural view of a thrombus breaker according to another embodiment of the present application.

Fig. 10 is an enlarged schematic view of the portion X in fig. 9.

Fig. 11 is a schematic view of the thrombolytic device of fig. 9 in an operational state after the distal end thereof is extended from the distal end of the aspiration catheter.

Fig. 12 is a schematic connection diagram of the first control mechanism, the bolt breaking rod and the bolt breaking mechanism according to an embodiment of the present application.

Fig. 13 is a schematic perspective view of a latch breaking mechanism according to an embodiment of the present disclosure.

Fig. 14 is a schematic perspective view of a latch breaking mechanism according to another embodiment of the present disclosure.

Description of the main reference signs

Bolt breaking device 1

Suction catheter 20

Notch 21

Suction power device 40

Pump body 41

Tube 43

Bolt breaker 60

Connecting pipe 80

First inner cavity 81

Second lumen 82

Main pipe body 83

Auxiliary pipe 84

Stop structure 85

Seal 86

Broken bolt 61

Pre-bent shaping segment 612

Adjustable bent section 614

Anchor ring 91

Traction wire 92

Bolt breaking mechanism 63

Fan blade 632

Protective housing 634

Operating handle 65

First control mechanism 651

Adjusting wheel 6512

Reference disk 6514

First ring 6341

Second ring 6342

The following detailed description will further illustrate the application in conjunction with the above-described figures.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments herein, are within the scope of the present application.

Furthermore, the following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments that can be used to practice the present application. Directional terms referred to in this application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are merely with reference to the directions of the attached drawings, and thus, the directional terms are used for better, more clear description and understanding of the present application, rather than to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

It should be noted that, in order to more clearly describe the structure of the thrombolytic device provided in the present application, the terms "proximal" and "distal" are defined in the specification of the present application as conventional terms in the field of interventional medical treatment. Specifically, "distal" refers to the end that is distal to the operator during a surgical procedure, and "proximal" refers to the end that is proximal to the operator during a surgical procedure; the direction of the rotation central axis of the column body, the tube body and other objects is defined as an axial direction; the circumferential direction is the direction around the axis of the column body, the pipe body and other objects; radial is the direction along the diameter or radius.

It is noted that the term "end" as used in the terms of "proximal", "distal", "one end", "other end", "first end", "second end", "initial end", "terminal", "both ends", "head end", "upper end", "lower end", etc. is not limited to a tip, endpoint or end face, but includes a location extending an axial distance and/or a radial distance from the tip, endpoint or end face to the element to which the tip, endpoint or end face belongs. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

Referring to fig. 1 to 3, the present application provides a thrombus breaking device 1 for sucking thrombus impurities 3 in a blood vessel 2. Specifically, the thrombus breaking device 1 includes a suction duct 20, a suction power device 40, and a thrombus breaker 60. The aspiration catheter 20 has a lumen extending axially through both ends thereof, and the distal end of the aspiration catheter 20 is adapted to extend into the blood vessel 2 and to be adjacent to the thrombotic impurity 3 within the blood vessel 2. The aspiration power means 40 communicates with the lumen of the aspiration catheter 20 for providing aspiration power to aspirate the thrombus impurities 3 from within the vessel 2 through the aspiration catheter 20 and to accommodate the aspirated thrombus impurities 3 by its volume. The thrombus breaker 60 is movably installed in the lumen of the aspiration catheter 20 with its distal end movably extended out of the distal end of the aspiration catheter 20 for pushing away or pulverizing thrombus impurities 3 blocking the distal end of the aspiration catheter 20.

The aspiration catheter 20 may be a prior art medical hollow tube having a lumen sized to permit reciprocal free movement of the thrombolytic device 60 therein. The suction power device 40 may be, but not limited to, a suction pump that uses vacuum negative pressure to provide suction power, and its specific structure and working principle are substantially the same as those of the suction pump in the prior art, and will not be described in detail.

In the thrombus breaking device 1 provided by the application, the thrombus breaking device 60 is movably penetrated in the inner cavity of the suction catheter 20, when the thrombus breaking device 1 is used for sucking thrombus impurities 3 in the blood vessel 2, if the thrombus impurities 3 block the distal end of the suction catheter 20, an operator can manually control the thrombus breaking device 60 to axially reciprocate and/or rotate in the inner cavity of the suction catheter 20, and the distal end of the thrombus breaking device 60 can extend out of the distal end of the suction catheter 20 so as to push away or break the thrombus impurities 3 blocking the distal end of the suction catheter 20, so that the thrombus impurities 3 are prevented from blocking a suction port of the distal end of the suction catheter 20, and thus high-efficiency thrombus breaking is realized. Furthermore, after the thrombus impurities 3 in the blood vessel 2 are crushed by the thrombus crusher 60, the thrombus impurities 3 are smaller in size, the thrombus impurities 3 can be sucked out by the suction power device 40 providing smaller suction power, and the crushed thrombus impurities 3 can be more easily discharged through the inner cavity of the suction catheter 20, so that the suction speed and the suction efficiency of the thrombus impurities 3 are improved. In addition, manual operation can be adopted in the whole use process of the thrombus breaking device 1, so that the thrombus breaking device is convenient and safe, and the inner wall of the blood vessel 2 can be protected to a greater extent.

In some embodiments, as shown in fig. 1 and 2, the suction power device 40 may include a pump body 41 and a tube body 43 with one end connected to the pump body 41, where the other end of the tube body 43 is used to communicate with the inner cavity of the suction catheter 20, and the pump body 41 is used to accommodate the sucked thrombus impurities 3. The tube 43 is preferably made of a flexible material and has a certain length, so that the pump body 41 can be fixedly placed, and an operator only needs to hold other parts except the pump body 41 in the bolt breaking device 1, so that the weight load of the operator is reduced, and the operation is more flexible.

Preferably, as shown in fig. 1 and 2, in some embodiments, the thrombolytic device 1 further includes a connection tube 80, the proximal end of the suction catheter 20 is inserted and fixed in the connection tube 80, the suction power device 40 is communicated with the inner cavity of the suction catheter 20 through the connection tube 80, and the thrombolytic device 60 is movably inserted into the inner cavity of the connection tube 80 and the inner cavity of the suction catheter 20 from the proximal end of the connection tube 80. It will be appreciated that once the suction catheter 20, suction power device 40 and thrombolytic device 60 are threaded together via the connecting tube 80, the connecting tube 80 may be held in one hand by an operator and the proximal end of the thrombolytic device 60 may be held in the other hand by the operator to control movement of the thrombolytic device 60 within the lumen of the suction catheter 20.

Specifically, referring to fig. 4 and 5, in some embodiments, the connection tube 80 has a first inner cavity 81 extending axially through both ends thereof and a second inner cavity 82 communicating with the first inner cavity 81. The proximal end of the suction catheter 20 is threaded into the first lumen 81, and the lumens of the suction catheter 20 are in communication with the first lumen 81 and the second lumen 82, respectively, the suction power device 40 is in communication with the lumens of the suction catheter 20 via the second lumen 82, and the pin breaker 60 (specifically the pin breaking rod 61 thereof) is movably threaded into the first lumen 81 and the lumens of the suction catheter 20 from the proximal end of the first lumen 81.

In the example of fig. 4 and 5, the connection tube 80 is a double-lumen tube including a main tube body 83 extending in the axial direction of the suction catheter 20 and a sub-tube body 84 connected to one side of the main tube body 83. The main tube 83 defines a first interior cavity 81, and the sub-tube 84 defines a second interior cavity 82. As shown in fig. 2, the end of the tube body 43 of the suction power device 40 far from the pump body 41 is connected to the end of the auxiliary tube body 84 far from the main tube body 83 in a sealing manner, so that the inner cavity of the tube body 43 is communicated with the second inner cavity 82, and further the pump body 41 is communicated with the inner cavity of the suction catheter 20 through the inner cavity of the tube body 43 and the second inner cavity 82. As shown in fig. 5, the proximal end of the aspiration catheter 20 is threaded into the first lumen 81 from the distal end of the main tubular body 83, and the lumen of the aspiration catheter 20 is in communication with the first lumen 81. The pin breaker 60 movably penetrates the first lumen 81 and the lumen of the aspiration catheter 20 from the proximal end of the main tubular body 83.

Wherein, the end of the tube body 43 far away from the pump body 41 can be fixedly connected or detachably connected, preferably detachably connected, with the end of the auxiliary tube body 84 far away from the main tube body 83. Thus, after the tube 43 is disconnected from the sub-tube 84, the end of the sub-tube 84 remote from the main tube 83 may be connected to a drug syringe to inject a drug (e.g., a drug that softens the thrombus impurity 3) into the blood vessel 2.

The inner diameter of the first inner cavity 81 is adapted to the outer diameter of the suction catheter 20, and the inner diameter of the first inner cavity 81 may be equal to or slightly larger than the outer diameter of the suction catheter 20, so long as the proximal end of the suction catheter 20 may penetrate the first inner cavity 81 and be fixed to the main tube 83 by any manner such as glue connection, screw connection or interference connection, which is not limited.

As shown in fig. 5, a portion of the outer wall of the suction catheter 20 near the proximal end thereof is provided with a notch 21 communicating with the inner cavity thereof, and when the suction catheter 20 is inserted into the first inner cavity 81, the notch 21 correspondingly communicates with the second inner cavity 82, so that the inner cavity of the suction catheter 20 communicates with the pump body 41 via the communicated second inner cavity 82 and the inner cavity of the tube body 43 (see fig. 2). As such, under the suction power provided by the suction power device 40, the thrombus impurities 3 (see fig. 3) may be sucked and sequentially enter the pump body 41 through the gap between the inner wall of the suction catheter 20 and the outer wall of the thrombus breaker 60 (specifically, the thrombus breaking rod 61), the notch 21, the second inner chamber 82, and the inner chamber of the tube body 43.

Wherein, alternatively, the secondary tube 84 may extend proximally in a direction away from the main tube 83 or distally in a direction away from the main tube 83 such that the connecting tube 80 is generally "Y" shaped, or the secondary tube 84 may extend in a direction perpendicular to the main tube 83 such that the connecting tube 80 is generally "T" shaped. Preferably, in the examples of fig. 4 and 5, the secondary tube 84 extends proximally in a direction away from the main tube 83, and the extending direction of the second lumen 82 conforms to the flow direction of the sucked thrombus impurities 3 in the gap between the inner wall of the suction catheter 20 and the outer wall of the thrombus breaker 60, and the blocking effect of the inner wall of the second lumen 82 on the thrombus impurities 3 is small, facilitating smooth flow of the thrombus impurities 3 into the second lumen 82 and further into the pump body 41 through the second lumen 82 and the lumen of the tube 43.

Further, alternatively, in the example of fig. 4 and 5, the inner diameter of the second inner chamber 82 gradually decreases from the end communicating with the tube body 43 to the end communicating with the first inner chamber 81, in other words, the inner diameter of the second inner chamber 82 gradually decreases in the transmission direction of the suction power. It will be appreciated that, with the respective dimensions of the gap, the notch 21 and the lumen of the tubular body 43 between the inner wall of the aspiration catheter 20 and the outer wall of the thrombolytic device 60 unchanged, the inner diameter of the second lumen 82 is configured to gradually decrease in the direction of delivery of aspiration power, which is advantageous for enhancing the aspiration action of the aspiration power provided by the aspiration power device 40 at the aspiration port at the distal end of the aspiration catheter 20, thereby improving the aspiration rate and aspiration efficiency of the thrombotic impurities 3. Conversely, when the sucked thrombus impurity 3 flows into the pump body 41 through the second inner chamber 82 and the tube body 43, since the inner diameter of the second inner chamber 82 is gradually increased in the flow direction thereof, the impact of the thrombus impurity 3 on the tube body 43 can be reduced, so that the thrombus impurity 3 is more likely to enter the pump body 41. Of course, in other examples, the inner diameter of the second lumen 82 may also remain unchanged, which is not limiting.

Preferably, in the examples of fig. 4 and 5, the inner wall of the first inner cavity 81 is provided with a stop structure 85, and the communication between the first inner cavity 81 and the second inner cavity 82 and the port of the proximal end of the first inner cavity 81 are located on two sides of the stop structure 85, respectively. When the proximal end of the aspiration catheter 20 is inserted into the first lumen 81, the proximal end of the aspiration catheter 20 abuts against the stop structure 85, and the notch 21 corresponds to the communication position between the first lumen 81 and the second lumen 82, so that the second lumen 82 is communicated with the lumen of the aspiration catheter 20. Through setting up backstop structure 85 in first inner chamber 81, can play spacing and location effect to suction catheter 20, operating personnel only need penetrate first inner chamber 81 with suction catheter 20's proximal end until suction catheter 20's proximal end supports backstop structure 85, can guarantee that suction catheter 20's breach 21 corresponds intercommunication second inner chamber 82, and then make second inner chamber 82 be linked together with suction catheter 20's inner chamber, operating personnel need not control suction catheter 20 deliberately and penetrates the length of first inner chamber 81, easy operation is convenient.

The stop structure 85 may be, but is not limited to, a stop ring or a stop block provided on the inner wall of the first inner cavity 81. In the examples of fig. 4 and 5, the stop structure 85 is a stop ring.

Further, in the example of fig. 4 and 5, the proximal end of the first lumen 81 is provided with a seal 86, the seal 86 having an inner bore. As shown in fig. 5, when the bolt breaker 60 is movably disposed through the first lumen 81 and the lumen of the aspiration catheter 20 in communication, the bolt breaker 60 passes through the inner bore of the seal 86 and mates with the seal 86. The seal 86 is used to seal the proximal port of the first lumen 81 to prevent leakage of blood or medical fluid from the proximal port of the first lumen 81 during aspiration of the thrombotic contaminants 3 by the aspiration power device 40 or infusion of a drug by a drug syringe.

Alternatively, the seal 86 may be fixedly disposed on the proximal inner wall of the first lumen 81 near the proximal port thereof, or may be fixedly disposed on the proximal end of the first lumen 81. In the example of fig. 4 and 5, the seal 86 is fixedly disposed on the proximal inner wall of the first lumen 81 near its proximal port.

The sealing member 86 may be, but is not limited to, an adjustable sealing valve, an elastic sealing ring, etc., and is fixedly connected to the connecting tube 80 by any reasonable means such as bonding, welding, etc., which is not limited thereto.

Referring to fig. 1, 3, 5 and 6, in some embodiments, the thrombus breaker 60 includes a breaking rod 61, where the breaking rod 61 is movably inserted into the communicating first cavity 81 and the cavity of the suction catheter 20, and after the distal end of the breaking rod 61 protrudes from the distal end of the suction catheter 20, the breaking rod 61 reciprocates and/or rotates axially, so as to push away or break up thrombus impurities 3 blocking the distal end of the suction catheter 20, thereby avoiding the thrombus impurities 3 blocking the suction port of the distal end of the suction catheter 20. To accommodate vessels 2 of different lengths and/or inner diameters, the length of the crushed bolt 61 ranges from 40cm to 200cm and the outer diameter of the crushed bolt 61 ranges from 3mm to 7mm.

The broken bolt rod 61 is provided with a guide wire cavity (see fig. 5) extending along the axial direction of the broken bolt rod, and the guide wire cavity is used for penetrating a guide wire. After the broken-plug rod 61 is inserted into the first lumen 81 and the lumen of the aspiration catheter 20, the broken-plug rod 61 together with the distal end of the aspiration catheter 20 can be conveyed along the guide wire to the vicinity of the thrombus impurities 3 in the blood vessel 2, and then the thrombus impurities 3 can be aspirated through the aspiration catheter 20 by the aspiration power provided by the aspiration power device 40. As shown in fig. 3, when the thrombus impurity 3 blocks the suction port at the distal end of the suction catheter 20, the thrombus impurity 3 can be pushed away from the suction port or pulverized by controlling the plunger 61 to reciprocate and/or rotate in the axial direction, thereby solving the problem that the thrombus impurity 3 blocks the suction port.

Among them, the broken-bolt rod 61 is preferably made of a material having wear resistance and self-lubricity (for example, but not limited to nylon), which facilitates smooth movement of the broken-bolt rod 61 in the blood vessel 2.

Further, as shown in fig. 1 and 6, in some embodiments, the thrombolytic device 60 further comprises an operating handle 65 connected to the proximal end of the thrombolytic rod 61, and the operator controls the axial movement and/or rotation of the thrombolytic rod 61 by holding the operating handle 65, thereby effecting pushing or pulverizing of thrombus impurities 3 blocking the distal end of the aspiration catheter 20.

Preferably, in the examples of fig. 1 and 6, the operating handle 65 is provided with an anti-slip structure for preventing slipping when the operator holds the operating handle 65 by hand. The anti-slip structure may be a protrusion and/or a groove provided on the surface of the operating handle 65, or may be an anti-slip material (such as but not limited to an anti-slip coating layer, an anti-slip film) covering the surface of the operating handle 65, and the specific structure form and number of the anti-slip structure are not limited, so long as the anti-slip structure has an anti-slip function.

Referring to fig. 7 and 8, in some embodiments, the distal end of the stopper rod 61 has a pre-curved shaping section 612, such that the distal end of the stopper rod 61 is bendable after extending from the distal end of the aspiration catheter 20, such that the stopper device 1 can be used to aspirate and expel thrombus impurities 3 from the curve of the vessel 2. The pre-curved shaping section 612 may be formed from a medical grade material that has good flexibility, such as, but not limited to, polyether amide. When the distal end of the latch rod 61 is received in the lumen of the suction catheter 20, the pre-curved shaping section 612 deforms to be substantially linear under the constraint of the inner wall of the suction catheter 20, and the pre-curved shaping section 612 gradually returns to deform and become curved during the process that the distal end of the latch rod 61 gradually extends out of the distal end of the suction catheter 20, so as to adapt to the curved blood vessel 2.

The bending angle of the pre-bending and shaping section 612 may be set according to the bending degree of the blood vessel 2 where the thrombus impurity 3 is located, and the bending degree of the blood vessel 2 may be obtained by the prior art such as ultrasound and Digital Subtraction Angiography (DSA), which will not be described in detail.

It will be appreciated that when the thrombus impurity 3 is present at a curved portion within the blood vessel 2, the reciprocating movement and/or rotation of the distal end-rectilinear breaking bar 61 controlled by the operation handle 65 will not be able to push away or break up the thrombus impurity 3, but rather will be liable to damage the inner wall of the blood vessel 2. Conversely, by providing the pre-curved shaping section 612 at the distal end of the thrombus-crushing rod 61, when the distal end of the thrombus-crushing rod 61 gradually extends out of the distal end of the aspiration catheter 20, the pre-curved shaping section 612 gradually bends and adapts to the curved blood vessel 2, and when the distal end of the thrombus-crushing rod 61 gradually gets into the distal end of the aspiration catheter 20, the pre-curved shaping section 612 deforms and becomes gradually straightened and gets into the aspiration catheter 20, so that the thrombus impurities 3 can be pushed away or crushed by controlling the reciprocating movement of the thrombus-crushing rod 61 with the pre-curved shaping section 612 along the axial direction by the operation handle 65, the problem that the suction port of the aspiration catheter 20 is blocked by the thrombus impurities 3 is solved, and the inner wall of the curved blood vessel 2 is not damaged. When the pre-bending section 612 is received in the lumen of the suction catheter 20, the operator can also control the rotation of the breaking pin 61 by operating the handle 65 to adjust the bending direction of the pre-bending section 612, so that the pre-bending section 612 can be accurately bent into the bent portion of the blood vessel 2 after extending out of the distal end of the suction catheter 20.

It will be appreciated that after the pre-curved shaping section 612 extends beyond the distal end of the aspiration catheter 20, the operator cannot control rotation of the morcellating pin 61 via the operating handle 65, avoiding the pre-curved shaping section 612 from rocking and damaging the inner wall of the vessel 2.

Referring to fig. 9-11, in other embodiments, the distal end of the pin 61 has at least one adjustable bend 614, and the pin breaker 60 further includes at least one set of bending members for adjusting the bending of the corresponding adjustable bend 614 after the distal end of the pin 61 extends from the distal end of the aspiration catheter 20. It will be appreciated that the breaker bar 61 may be provided with a plurality of adjustable bend segments 614 and that the breaker bar 61 may be bent in a plurality of directions when a plurality of sets of bend adjusting assemblies are provided.

Specifically, in the example of fig. 9 to 11, the bending adjustment assembly includes an anchor ring 91 fixedly disposed at a distal end of the broken bolt 61, and at least one traction wire 92 movably penetrating into the broken bolt 61, one end of the traction wire 92 is fixedly connected to the anchor ring 91, the other end extends out from a proximal end of the broken bolt 61, the adjustable bending section 614 connected to the anchor ring 91 is driven to bend according to a traction direction by pulling the traction wire 92 proximally, and the adjustable bending section 614 is restored to be linear when the traction wire 92 is released.

Wherein the adjustable bend 614 may be made of a medical material with good bending property, such as but not limited to polyether amide; the specific structure and bending principle of the anchoring ring 91 and the traction wire 92 are the same as those of the prior art, and will not be described in detail.

Preferably, as shown in fig. 9, in some embodiments, the proximal end of the bending assembly (i.e., the proximal end of the pull wire 92) is coupled to a first control mechanism 651 on the operating handle 65, the first control mechanism 651 being used to control the bending assembly action (i.e., pulling or releasing the pull wire 92) to adjust the bending angle of the adjustable bending section 614. Specifically, referring to fig. 12, in one possible embodiment, the first control mechanism 651 includes an adjustment wheel 6512 rotatably mounted about the proximal end of the bolt 61, and the proximal end of the pull wire 92 is fixedly coupled to the adjustment wheel 6512. When the adjustment wheel 6512 rotates clockwise about the shredding bolt 61, the adjustment wheel 6512 winds around the proximal portion of the pull wire 92, thereby pulling the pull wire 92 proximally to bend the corresponding adjustable bend segment 614; when the adjustment wheel 6512 rotates counterclockwise about the shredder bolt 61, the adjustment wheel 6512 releases the coiled pull wire 92, thereby restoring the corresponding adjustable bend 614.

Further preferably, as shown in fig. 12, in a possible embodiment, the first control mechanism 651 further includes an angle reference disc 6514 fixedly disposed at a proximal end of the breaking pin 61, and the angle reference disc 6514 is provided with a plurality of angle marks for displaying reference to the adjustment angle around its circumference, so that an operator can quantitatively adjust the bending angle of the adjustable bending section 614 with reference to the plurality of angle marks on the angle reference disc 6514, thereby being more convenient for the operator to operate.

The adjusting wheel 6512 and the angle reference disc 6514 may be disposed at intervals along the axial direction of the breaking pin 61, and the adjusting wheel 6512 may be disposed on a side of the angle reference disc 6514 away from the adjustable curved section 614, or may be disposed on a side of the angle reference disc 6514 close to the adjustable curved section 614, which is not limited thereto.

It can be appreciated that, by arranging at least one adjustable bending section 614 at the distal end of the thrombus breaking rod 61 and correspondingly arranging at least one group of bending components on the thrombus breaking device 60, as shown in fig. 11, when thrombus impurities 3 exist at the bending position in the blood vessel 2, the thrombus breaking rod 61 is controlled to reciprocate by the operating handle 65, and simultaneously the bending components are controlled to act by the first control mechanism 651 to drive the corresponding adjustable bending section 614 to bend, so that the thrombus impurities 3 can be pushed open or crushed, thereby solving the problem that the thrombus impurities 3 block the suction port of the suction catheter 20, and the inner wall of the bent blood vessel 2 is not damaged. Moreover, compared to the pre-bending shaping section 612 in some embodiments, when the adjustable bending section 614 is bent under the drive of the corresponding connected bending component, an operator can quantitatively adjust the bending angle of the adjustable bending section 614 through the cooperation of the adjusting wheel 6512 and the angle reference disc 6514, so that the distal end of the broken bolt rod 61 can be bent to different angles, and therefore, the broken bolt device 1 with the broken bolt rod 61 of at least one adjustable bending section 614 arranged at the distal end can be used for sucking out the thrombus impurities 3 in the blood vessel 2 with different bending degrees, and in addition, when the adjustable bending section 614 is not bent, the broken bolt device 1 can also be used for sucking out the thrombus impurities 3 in the straight blood vessel 2, so that the application range is wider.

Referring to fig. 3 and 6-11, in some embodiments, the thrombus breaker 60 further includes a thrombus breaking mechanism 63 disposed at a distal end of the thrombus breaking rod 61, the thrombus breaking mechanism 63 for providing a shearing force to break up thrombus impurities 3 clogging the distal end of the aspiration catheter 20. By providing the thrombus-crushing mechanism 63 at the distal end of the thrombus-crushing rod 61, when the distal end of the aspiration catheter 20 encounters a harder coagulated thrombus impurity 3, the thrombus-crushing rod 61 may not be axially reciprocally moved and/or rotated to crush the coagulated thrombus impurity 3, and the coagulated thrombus impurity 3 may be crushed by the shearing force provided by the thrombus-crushing mechanism 63, thereby solving the problem that the thrombus impurity 3 blocks the aspiration port of the aspiration catheter 20.

Referring to fig. 13 and 14, in some embodiments, the latch breaking mechanism 63 may be a turbine structure, which includes at least one rotatable fan blade 632 and a protective housing 634 fixedly connected to each fan blade 632 and surrounding the fan blade 632. The fan blades 632 rotate at a higher speed and can be used for shearing and breaking up the thrombus impurity 3, so that the thrombus impurity 3 can not block the suction port of the suction catheter 20, and the protective shell 634 is used for preventing the inner wall of the blood vessel 2 from being damaged when the fan blades 632 rotate, so that the whole thrombus breaking device 1 has higher safety.

The blade surface of each fan blade 632 is preferably parallel to the central axis of the suction catheter 20, so that the suction port of the suction catheter 20 is enlarged, the suction speed is increased, and the suction efficiency is improved when the thrombus is not required to be broken.

It will be appreciated that the number of blades 632 cannot be too large, for example, three when the inner diameter of the vessel 2 is small, and that four or five or more blades 632 can be provided when the inner diameter of the vessel 2 is large, so as to improve the thrombus breaking efficiency. The number of fan blades 632 is preferably three. The guide wire cavity of the shredding bar 61 penetrates through the connection parts of the plurality of fan blades 632, the fan blades 632 may be connected to the operation handle 65 via the transmission member, and the operation handle 65 may control the fan blades 632 to rotate so as to shred the thrombus impurity 3.

Wherein, the fan blade 632 and the protective housing 634 are fixedly connected, for example, by laser welding. Both the fan blade 632 and the protective housing 634 may be made of medical metal materials (such as, but not limited to, stainless steel) or polymer materials (such as, but not limited to, polyethylene, polyether amide). Preferably, the fan blade 632 is made of a metal material, the protective housing 634 is made of a polymer material, and the hardness of the fan blade 632 is greater than that of the protective housing 634, so that the cooperation can not only break the thrombus, but also protect the inner wall of the blood vessel 2.

Alternatively, as shown in fig. 13, in one possible embodiment, the protective housing 634 is a cylindrical protective housing, which is disposed around the outer peripheral side of the multi-lobed fan blades 632, and the inner peripheral wall of the protective housing 634 is connected to the outer edge of each fan blade 632 along the radial direction of the thrombus shaft 61, thereby protecting the inner wall of the blood vessel 2.

Alternatively, as shown in fig. 14, in another possible embodiment, the protection shell 634 includes a first ring 6341 and a second ring 6342, where the first ring 6341 and the second ring 6342 are disposed at intervals along the axial direction of the breaking pin 61, and are fixedly connected to the proximal end and the distal end of the outer edge of each fan blade 632 respectively. In this way, the first ring 6341 and the second ring 6342, which are disposed at intervals along the axial direction of the cock stem 61, are disposed around the outer periphery of the multi-bladed fan blade 632, thereby protecting the inner wall of the blood vessel 2. The first ring 6341 may be disposed on a side of the second ring 6342 away from the distal end of the bolt 61, or may be disposed on a side of the second ring 6342 near the distal end of the bolt 61, which is not limited thereto.

Preferably, in the example of fig. 14, the protective housing 634 is further connected to a second control mechanism (not shown) on the operating handle 65, and the second control mechanism is used to control the action of the protective housing 634 to adjust the deflection angle of the blade surface of each fan blade 632. Specifically, the second control mechanism is connected to at least one of the first ring 6341 and the second ring 6342 to drive the first ring 6341 and the second ring 6342 to relatively rotate reversely, so that the deflection angle of the blade surface of each fan blade 632 is gradually increased. In a possible embodiment, the second control mechanism may include a first adjusting wheel ring and a second adjusting wheel ring that are sleeved on the proximal end of the bolt 61, where the first adjusting wheel ring and the second adjusting wheel ring are respectively connected to the first ring body 6341 and the second ring body 6342, and by controlling the first adjusting wheel ring and the second adjusting wheel ring to rotate reversely, the first ring body 6341 and the second ring body 6342 are driven to rotate reversely, so as to drive the leaf surface of each fan blade 632 to twist and swing, and as the reverse rotation of the first adjusting wheel ring and the second adjusting wheel ring is continuously performed, the swing angle of the leaf surface of each fan blade 632 is gradually increased, and the adjustment range of the swing angle is between 0 degrees and 90 degrees.

As described above, when the bolt breaking is not needed, the blade surfaces of each fan blade 632 are parallel to the central axis of the suction catheter 20, and when the bolt breaking is needed, the second control mechanism on the operating handle 65 can control the first ring 6341 and the second ring 6342 to rotate reversely, so as to make the blade surfaces of each fan blade 632 swing, so that an included angle is formed between the blade surfaces of each fan blade 632 and the central axis of the suction catheter 20, that is, the fan blade 632 is in an inclined state. It is understood that the inclined fan blades 632 can cut the thrombus impurity 3 in a beveling manner, so that the thrombus impurity 3 can be smashed more efficiently, and the thrombus smashing efficiency is improved.

Wherein, optionally, the second control mechanism of the operating handle 65 may be provided with a reference object for indicating the radian of the reverse rotation of the first adjusting wheel ring and the second adjusting wheel ring, thereby indicating the deflection angle of the blade surface of each fan blade 632. The reference object may be the angle reference disk 6514 (see fig. 12) in the foregoing embodiment, or may be another reference member provided with a plurality of reference points, which will not be described in detail.

It can be appreciated that in the bolt crushing device 1 of any of the foregoing embodiments, the distal end of the bolt crushing rod 61 may be provided with the bolt crushing mechanism 63 to improve the bolt crushing efficiency, which will not be described herein.

Optionally, in some embodiments, the outer surface of the suction catheter 20 is provided with a first hydrophilic coating and/or the outer surface of the rag stem 61 is provided with a second hydrophilic coating at least at its distal end, preferably both the outer surface of the suction catheter 20 and the outer surface of the rag stem 61 are provided with hydrophilic coatings. Among them, the first hydrophilic coating and the second hydrophilic coating may be a surcoss hydrophilic super-slip coating, a methylethyl ether anhydrous maleic acid copolymer hydrophilic coating, a polyvinylpyrrolidone, a polyacrylic acid or a silica coating, etc., preferably a surcoss hydrophilic super-slip coating having blood compatibility and a low friction coefficient.

It will be appreciated that the provision of a first hydrophilic coating on the outer surface of the aspiration catheter 20 facilitates the aspiration catheter 20 to extend into the blood vessel 2, reducing the interface trauma between the aspiration catheter 20 and human tissue, and allowing for a smoother back and forth movement of the aspiration catheter 20 within the blood vessel 2. Providing the outer surface of the broken pin 61 with the second hydrophilic coating facilitates penetration of the broken pin 61 into the lumen of the aspiration catheter 20 and its distal end into the blood vessel 2, reduces frictional resistance between the broken pin 61 and the aspiration catheter 20, and reduces interfacial damage with the inner wall of the blood vessel 2, and facilitates smoother back and forth movement and/or rotation of the broken pin 61 within the lumen of the aspiration catheter 20 and the blood vessel 2.

The following describes the use of the thrombus breaking device 1 of the present application for sucking thrombus impurities 3 in a blood vessel 2, taking as an example the thrombus breaking device 1 provided with an operation handle 65, a connection pipe 80 and a thrombus breaking mechanism 63, with reference to fig. 1 to 3 and 5.

In a first step, the stopper rod 61 of the stopper 60 is threaded from the proximal end of the main tubular body 83 into the communicating first lumen 81 and lumen of the aspiration catheter 20, and the stopper mechanism 63 at the distal end of the stopper rod 61 is located in the distal lumen of the aspiration catheter 20. The suction power device 40 is not connected to the end of the sub-pipe 84 away from the main pipe 83.

In the second step, as shown in fig. 3, the guide wire lumen of the thrombus breaking rod 61 is sleeved into the guide wire and reaches the lesion site of the blood vessel 2 under the guide of the guide wire, so that the distal end of the thrombus breaking device 1 is propped against the thrombus impurity 3, and at this time, the medicament injector can be connected to the medicament injector through the auxiliary tube 84 to deliver medicament to the lesion site of the blood vessel 2, thereby softening the thrombus impurity 3.

Third, after the medicine is injected, the medicine injector is detached from the auxiliary tube 84, then the tube 43 of the suction power device 40 is connected to the auxiliary tube 84, and finally the suction power device 40 is used to provide suction power, so that the thrombus impurities 3 start to enter the suction catheter 20 under the action of the suction power and sequentially enter the pump body 41 through the gap, the notch 21, the second inner cavity 82 and the inner cavity of the tube 43 between the inner wall of the suction catheter 20 and the outer wall of the broken bolt 61.

Fourth, when the suction port of the suction catheter 20 is blocked by the thrombus impurity 3, the distal end of the thrombus-breaking rod 61 is controlled to extend out of the distal end of the suction catheter 20 by holding the operation handle 65 and is reciprocally moved and/or rotated in the axial direction in the suction catheter 20 to push away or break up the thrombus impurity 3, thereby achieving rapid suction of the thrombus impurity 3. It is to be noted that this step is not necessary when the suction port is blocked by the thrombus impurity 3.

And fifthly, when the hard coagulated thrombus impurities 3 block the suction port of the suction catheter 20, the thrombus impurities 3 are crushed by controlling the thrombus crushing mechanism 63 through the operation handle 65, so that the problem that the thrombus blocks the suction port is solved. Similarly, when the suction port is not blocked by the relatively hard coagulated thrombus impurity 3, this step is not required.

In summary, in the thrombus breaking device 1 provided in the present application, the thrombus breaking device 60 is movably installed in the inner cavity of the suction catheter 20, when the thrombus impurity 3 blocks the distal end of the suction catheter 20, an operator can control the thrombus breaking device 60 to reciprocate and/or rotate along the axial direction in the inner cavity of the suction catheter 20, so that the distal end of the thrombus breaking device 60 extends out of the distal end of the suction catheter 20 to push away or break the thrombus impurity 3 blocking the distal end of the suction catheter 20, thereby avoiding the thrombus impurity 3 from blocking the suction port of the suction catheter 20, and realizing efficient thrombus breaking; in addition, the thrombus breaking device 1 adopts manual operation in the use process, is convenient and safe, and can protect the inner wall of the blood vessel 2 to a greater extent.

In the description of the present specification, descriptions of the terms "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A thrombolytic device comprising:

a suction catheter having an inner lumen extending axially therethrough at both ends;

a suction power device communicated with the inner cavity of the suction catheter and used for providing suction power to suck out thrombus impurities in blood vessels through the suction catheter and accommodating the sucked thrombus impurities through the volume of the suction power device; and

a thrombus breaker movably penetrating the inner cavity of the suction catheter, and the distal end of the thrombus breaker movably extending out of the distal end of the suction catheter for pushing away or breaking up thrombus impurities blocking the distal end of the suction catheter.

2. The bolt crushing apparatus of claim 1, further comprising a connecting tube;

the connecting pipe is provided with a first inner cavity which axially penetrates through two ends of the connecting pipe and a second inner cavity which is communicated with the first inner cavity;

the proximal end of the suction catheter is inserted into the first inner cavity, and the inner cavities of the suction catheter are respectively communicated with the first inner cavity and the second inner cavity;

the suction power device is communicated with the inner cavity of the suction catheter through the second inner cavity;

the thrombus breaker movably penetrates into the first lumen and the lumen of the aspiration catheter from a proximal end of the first lumen.

3. The thrombolytic device of claim 1, wherein said thrombolytic device comprises a thrombolytic rod movably mounted in said lumen of said aspiration catheter, said thrombolytic rod being axially reciprocally movable and/or rotatable after extension of a distal end of said aspiration catheter to push or pulverize said thrombotic impurities blocking said distal end of said aspiration catheter.

4. A thrombolytic device as claimed in claim 3 wherein the distal end of said thrombolytic rod has a pre-curved shaping section such that the distal end of said thrombolytic rod is bendable after extending from the distal end of said aspiration catheter.

5. A thrombolytic device as defined in claim 3 wherein said distal end of said thrombolytic rod has at least one adjustable bend section, said thrombolytic device further comprising at least one set of bending adjustment assemblies for adjusting the bending of the respective adjustable bend section after the distal end of said thrombolytic rod extends from the distal end of said aspiration catheter.

6. The thrombolytic device of claim 5 wherein said buckle adjustment assembly comprises an anchor ring fixedly disposed at a distal end of said thrombolytic rod and at least one pull wire movably disposed within said thrombolytic rod, said pull wire having one end fixedly connected to said anchor ring and another end extending from a proximal end of said thrombolytic rod.

7. The thrombolytic device of any one of claims 3-6, wherein said thrombolytic device further comprises a thrombolytic mechanism disposed at a distal end of said thrombolytic rod, said thrombolytic mechanism for providing shear force to pulverize thrombotic impurities blocking a distal end of said aspiration catheter.

8. The latch breaking device according to claim 7, wherein the latch breaking mechanism is a turbine structure and comprises at least one rotatable fan blade and a protective shell fixedly connected to each fan blade and surrounding the fan blade.

9. The thrombolytic device of claim 8 wherein said fan blade has a hardness greater than that of said protective shell.

10. A thrombolytic device as claimed in claim 3 wherein said thrombolytic device further comprises an operating handle connected to a proximal end of said thrombolytic rod, said operating handle for controlling axial movement and/or rotation of said thrombolytic rod.

11. The thrombolytic device of claim 10 wherein said distal end of said thrombolytic rod has at least one adjustable bend, said thrombolytic device further comprising at least one set of bend-adjusting assemblies;

the proximal end of the bending adjustment assembly is connected with a first control mechanism on the operating handle, and the first control mechanism is used for controlling the bending adjustment assembly to act so as to adjust the bending angle of the adjustable bending section.

12. The bolt crushing device of claim 10, wherein the bolt crusher further comprises a bolt crushing mechanism arranged at the distal end of the bolt crushing rod, the bolt crushing mechanism is of a turbine structure and comprises at least one rotatable fan blade and a protective shell fixedly connected with each fan blade and surrounding the periphery of the fan blade;

the protective shell is connected with a second control mechanism on the operating handle, and the second control mechanism is used for controlling the action of the protective shell to adjust the deflection angle of the blade surface of each fan blade.

13. The bolt crushing device of claim 12, wherein the protective shell comprises a first ring body and a second ring body, the first ring body and the second ring body are arranged at intervals along the axial direction of the bolt crushing rod, and the proximal end and the distal end of the outer edge of each fan blade are respectively and fixedly connected;

the second control mechanism is at least connected with one of the first ring body and the second ring body so as to drive the first ring body and the second ring body to relatively rotate reversely, so that the deflection angle of the blade surface of each fan blade is gradually increased.

14. A thrombolytic device as claimed in claim 3 wherein the outer surface of said aspiration conduit is provided with a first hydrophilic coating and/or the outer surface of said thrombolytic rod is provided with a second hydrophilic coating at least at its distal end.

15. The thrombolytic device of claim 2, wherein the inner wall of said first lumen is provided with a stop structure, and the communication between said first lumen and said second lumen and the port at the proximal end of said first lumen are located on both sides of said stop structure, respectively; a notch communicated with the inner cavity is formed in the part, close to the proximal end, of the outer wall of the suction catheter;

when the proximal end of the suction catheter is inserted into the first inner cavity, the proximal end of the suction catheter abuts against the stop structure, and the notch corresponds to the communication position of the first inner cavity and the second inner cavity, so that the second inner cavity is communicated with the inner cavity of the suction catheter.