A pulmonary embolism thrombus cleaning device

Abstract

The present invention relates to the field of medical technology. The purpose is to provide a pulmonary embolism thrombus cleaning device, which includes a driving cylinder, a suction cylinder arranged at the lower end of the driving cylinder and communicated with the driving cylinder, and a thrombus removal tube that can be placed at the thrombus position through a catheter; a suction piston that moves in the up and down direction and is matched with the inner cavity of the suction cylinder is arranged in the suction cylinder; a driving rod is arranged inside the driving cylinder, and the lower end of the driving rod extends into the suction cylinder and is connected to the suction piston; a cylinder cover with a spiral hole opened in the center is arranged at the upper end of the driving cylinder, a spiral section matched with the spiral hole is arranged on the upper section of the driving rod, the spiral section of the driving rod is arranged in the spiral hole, and the upper end of the driving rod is connected to the tail plate through a rotary joint; the present invention can simultaneously rotate, break, cut and aspirate thrombus, greatly improving the thrombus removal efficiency, and at the same time has a simple structure and good stability.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and particularly to a thrombus cleaning device. Background Art

[0002] Acute pulmonary embolism is a common cardiovascular disease at present. It is a clinical and pathophysiological syndrome caused by the obstruction of the pulmonary artery by endogenous or exogenous emboli shedding (deep vein thrombosis is the main thrombus source causing pulmonary thromboembolism, often caused by the shedding of thrombus formed in the deep veins of the lower extremities), with a very high fatality rate, seriously endangering the health and quality of life of patients.

[0003] Therefore, how to eliminate thrombus emboli is the core process in the whole treatment process. At present, common thrombus cleaning devices include two major categories: stent type and wire type. Both the former and the latter build filters at the distal end. After the instrument reaches the thrombus position through the catheter, the stent type expands through its expansibility and cuts and breaks the thrombus during the expansion process (some products have external drive rotation), while the wire type rotates under external drive after the wire penetrates into the thrombus and breaks the thrombus with the wire; the broken thrombus blocks are blocked by the filter, and finally, the broken thrombus fragments are aspirated and discharged with the cooperation of an external suction device to achieve the effect of thrombus removal.

[0004] However, whether it is the stent type or the wire type, it is necessary to cooperate with an external active suction device to aspirate the thrombus after the thrombus is broken, and it is impossible to directly aspirate the thrombus block during the process of cutting and breaking, which results in a lower thrombus removal efficiency of the overall product, and due to the overall aspiration and discharge at a unified time node, the risk of blockage is relatively high.

[0005] Therefore, if it is possible to synchronously aspirate and discharge the thrombus block during the process of breaking the thrombus in a simple way, the thrombus removal efficiency can be greatly improved, and the risk of tube blockage can be reduced. Summary of the Invention

[0006] The purpose of the present invention is to provide a pulmonary embolism thrombus cleaning device that can complete breaking and aspiration synchronously.

[0007] To achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is: a pulmonary embolism thrombus cleaning device, including a driving cylinder, a suction cylinder arranged at the lower end of the driving cylinder and communicated with the driving cylinder, and a thrombus removal tube that can be placed at the thrombus position through a catheter.

[0008] A suction piston that moves in the vertical direction and is matched with the inner cavity of the suction cylinder is arranged inside the suction cylinder; a driving rod is arranged inside the driving cylinder, the lower end of the driving rod extends into the suction cylinder and is connected to the suction piston; a cylinder cover with a spiral hole in the center is arranged at the upper end of the driving cylinder, a spiral section that is matched with the spiral hole is arranged on the upper section of the driving rod, the spiral section of the driving rod is arranged in the spiral hole, and the upper end of the driving rod is connected to the tail plate through a rotary joint; when an axial pushing or pulling force is applied to the driving rod through the tail plate, the driving rod and the suction piston can be driven to rotate while moving axially.

[0009] A crushing member is arranged at the end of the thrombus removal tube, the head end of the thrombus removal tube is arranged at the bottom of the suction cylinder and forms a rotational fit with the suction cylinder; a rotational transmission assembly is arranged between the thrombus removal tube and the suction piston, and the rotational transmission assembly can transmit torque to the thrombus removal tube during the lifting process of the suction piston.

[0010] Preferably, the rotational transmission assembly includes a plurality of elastic connecting wires, the upper ends of the elastic connecting wires are connected to the bottom of the suction piston, and the lower ends are connected to the upper end of the thrombus removal tube; the plurality of elastic connecting wires are distributed in a ring-shaped lantern shape around the thrombus removal tube.

[0011] Preferably, the rotational transmission assembly includes a piston hinge joint arranged at the bottom of the suction piston, a tube hinge joint arranged at the upper end of the thrombus removal tube, and at least one V-shaped transmission rod, the middle section of the transmission rod is hinged, and the upper end and the lower end of the transmission rod are respectively hinged to the piston hinge joint and the tube hinge joint.

[0012] Preferably, two transmission rods are arranged, and the V-shaped openings of the two transmission rods face inward and are symmetrically distributed on both sides of the thrombus removal tube.

[0013] Preferably, the crushing member is a spiral elastic wire.

[0014] Preferably, the crushing member is a lantern-shaped expansion frame.

[0015] Preferably, a side discharge pipe is arranged at the lower part of one side of the suction cylinder, and a one-way valve that is unidirectionally communicated from the inside to the outside is arranged on the side discharge pipe.

[0016] Preferably, a one-way valve flap that prevents liquid from flowing from the suction cylinder to the thrombus removal tube is arranged at the head end of the thrombus removal tube.

[0017] Preferably, a grip driving mechanism is further arranged outside the driving cylinder, the grip driving mechanism includes two grip rods, the upper ends of the two grip rods are respectively hinged to both sides of the tail plate, the lower ends are hinged to one end of a short connecting rod, and the other end of the short connecting rod is hinged to one side of the lower part of the driving cylinder.

[0018] Preferably, finger rings for the operator's fingers to pass through are arranged on the middle sections of the grip rods.

[0019] The beneficial effects of the present invention are mainly reflected in that it can simultaneously rotate, crush, cut and aspirate thrombus, greatly improving the thrombus removal efficiency. Meanwhile, it has a simple structure and good stability. Specifically, during the use of the present invention, the catheter is first placed, and conventional operations such as injecting thrombolytic drugs are carried out through the catheter. Then, the thrombus removal tube is inserted into the thrombus position through the catheter. The thrombus removal part at the end of the thrombus removal tube penetrates into the thrombus and cooperates with the imaging to mark the position. After reaching the position, the driving rod is driven to move upward along the axis. The upward movement of the driving rod drives the suction piston to move upward, thereby generating negative pressure suction. At the same time, during the upward movement of the driving rod, due to the existence of the spiral section and the spiral hole, the driving rod rotates continuously, and then drives the suction piston, the rotation transmission component and the thrombus removal tube to rotate in sequence. The crushing part at the end of the thrombus removal tube rotates, thereby cutting and crushing the thrombus. The present invention can simultaneously perform suction operation while crushing to suck out the crushed thrombus blocks, greatly improving the thrombus removal efficiency, and can avoid secondary accumulation of the crushed thrombus blocks, greatly reducing the risk of tube blockage. Moreover, the overall structure of the present invention is simple and compact, and it uses passive mechanical drive, which can greatly reduce the medical cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is Figure 1 an enlarged view of part A in

[0022] Figure 3 is Figure 1 an enlarged view of part B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings. The embodiments described are only a part of the embodiments of the present invention, rather than all of them, aiming to be better implemented by those skilled in the art in engineering, rather than limiting the use of the present invention.

[0024] The object of the present invention is to provide a pulmonary embolism thrombus cleaning device, which can follow the catheter into the thrombus position in the blood vessel, cooperate with imaging for real-time and rapid thrombus removal operations, has dual functions of crushing and aspiration, and can realize synchronous crushing and aspiration operations. At the same time, due to the use of passive mechanical drive, the overall structure is simple and compact, and the production and manufacturing cost is low, which can greatly reduce the medical cost.

[0025] The present invention includes a main body part and a thrombus removal tube. The main body part serves as the operation end, and the thrombus removal tube is inserted into the thrombus position through the catheter. As Figure 1As shown in the figure, for the sake of simplifying the illustration, except that the shown length of the thrombus removal tube 3 is shorter, its proportion can be designed according to needs in actual operation. The present invention includes a driving cylinder 1, a suction cylinder 2 provided at the lower end of the driving cylinder 1 and communicating with the driving cylinder 1, and a thrombus removal tube 3 that can be placed at the thrombus position through a catheter.

[0026] As an active motion driving device of the present invention, a suction piston 4 that moves in the up and down direction and is matched with the inner cavity of the suction cylinder 2 is arranged in the suction cylinder 2 of the present invention. A driving rod 5 (for driving the suction piston 4 to lift and rotate) is arranged inside the driving cylinder 1. The lower end of the driving rod 5 extends into the suction cylinder 2 and is connected to the suction piston 4. The lifting drive of the suction piston 4 is realized through the up and down movement of the driving rod 5.

[0027] In order to synchronously realize the rotational drive of the suction piston 4, a cylinder cover 6 with a spiral hole opened in the center is arranged at the upper end of the shown driving cylinder 1. A spiral section 7 that is matched with the spiral hole is arranged on the upper section of the driving rod 5. The spiral section 7 of the driving rod 5 is arranged in the spiral hole, so that the driving rod 5 can rotate during the axial movement process. At the same time, the upper end of the driving rod 5 of the present invention is connected to the tail plate 9 through a rotary joint 8. By pushing and pulling the tail plate 9, the driving of the driving rod 5 is realized. The rotary joint 8 can release the rotational force generated during the lifting process of the driving rod 5 and prevent the operating end (tail plate 9) from being affected by rotation.

[0028] Through the above structure, when the present invention applies an axial pushing and pulling force to the driving rod 5 through the tail plate 9, it can drive the driving rod 5 and the suction piston 4 to rotate while moving axially. Of course, for more convenient operation, a ring body can be arranged on the tail plate 9 for easy pushing and pulling. This structure is the simplest, but on the one hand, the tail plate 9 needs to be pushed and pulled, and on the other hand, the driving cylinder 1 needs to be stabilized, often requiring both hands to operate.

[0029] Therefore, a better way of the present invention can also be to realize convenient single-handed operation through structural design, such as Figure 1 As shown in the figure, a pinch driving mechanism is further arranged outside the driving cylinder 1. The pinch driving mechanism includes two pinch rods 15. The upper ends of the two pinch rods 15 are respectively hinged to both sides of the tail plate 9, and the lower ends are hinged to one end of a short connecting rod 16. The other end of the short connecting rod 16 is hinged to one side of the lower part of the driving cylinder 1. Through the pinching and relaxation of the pinch rods 15, the operation can be realized in a single-handed holding state. A finger ring 17 for the operator's finger to penetrate is arranged in the middle section of the pinch rod 15, so that the operation doctor's finger can penetrate it to facilitate the control of the pinching and relaxation of the pinch rod 15.

[0030] At the end of the thrombus removal tube 3 of the present invention, a crushing member 10 is provided. The head end of the thrombus removal tube 3 is arranged at the bottom of the suction cylinder 2 and is rotationally matched with the suction cylinder 2, that is, it is in a rotatable state. A rotary transmission assembly is arranged between the thrombus removal tube 3 and the suction piston 4. The rotary transmission assembly can transmit the rotation of the suction piston 4 to the thrombus removal tube 3. However, since the suction piston 4 has a lifting state, that is, torque is transmitted to the thrombus removal tube 3 during the lifting process of the suction piston 4. In order to achieve the above functions, the present invention simply elaborates two different structures of the rotary transmission assembly here. Of course, more forms and structural designs are feasible as long as the same effect can be achieved.

[0031] Two structures of the rotary transmission assembly: 1. The rotary transmission assembly includes a plurality of elastic connecting wires. The upper ends of the elastic connecting wires are connected to the bottom of the suction piston 4, and the lower ends are connected to the upper end of the thrombus removal tube 3. The plurality of elastic connecting wires are distributed in an annular lantern shape around the thrombus removal tube 3. That is to say, the elastic connecting wires are distributed in the form of a lantern skeleton. It has a certain flexibility and can flex adaptively during the lifting process of the suction piston 4. 2. That is Figure 3 In the structure shown, the rotary transmission assembly includes a piston hinge head 11 arranged at the bottom of the suction piston 4, a tube hinge head 12 arranged at the upper end of the thrombus removal tube 3, and at least one V-shaped transmission rod 13. The middle section of the transmission rod 13 is hinged, and the upper and lower ends of the transmission rod 13 are respectively hinged to the piston hinge head 11 and the tube hinge head 12. In this case, generally, two transmission rods 13 are provided, and the V-shaped openings of the two transmission rods 13 face inward and are symmetrically distributed on both sides of the thrombus removal tube 3 to ensure balance and reliability.

[0032] Regarding the specific form of the crushing member 10 of the present invention, it can be that the crushing member 10 is a spiral elastic wire. When in the catheter, it can maintain linearity for easy insertion, and after being discharged from the catheter, it can return to a spiral shape under elasticity. Of course, it is also feasible to use a shape memory alloy material for production. In addition to the above methods, the crushing member 10 of the present invention can also be that the crushing member 10 is a lantern-shaped expansion frame, which is composed of a plurality of crushing wires distributed in the shape of a lantern skeleton. It can also be bundled into a linear shape in the catheter for easy insertion.

[0033] In addition, in order to discharge the thrombus and liquid sucked into the suction cylinder 2, a side discharge pipe 14 is provided at the lower part on one side of the suction cylinder 2, and a one-way valve that communicates unidirectionally from the inside to the outside is provided on the side discharge pipe 14. In order to synchronously control the backflow at the thrombus removal tube 3, a one-way valve flap that prevents liquid from flowing from the suction cylinder 2 to the thrombus removal tube 3 can be provided at the head end of the thrombus removal tube 3.

[0034] The above embodiments are only preferred embodiments of the present invention. Those skilled in the art can make appropriate modifications to the technical solutions provided by the present invention according to the actual engineering situation. The modifications and equivalent transformations made do not depart from the scope of protection required by the present invention. The scope of the rights required by the present invention shall be subject to the appended claims.

Claims

1. A pulmonary embolism thrombus removal device, characterized in that: It comprises a driving cylinder (1), a suction cylinder (2) arranged at the lower end of the driving cylinder (1) and connected to the driving cylinder (1), and a thrombus removal tube (3) that can be inserted into the location of the thrombus through a catheter; The suction cylinder (2) is provided with a suction piston (4) which cooperates with the inner cavity of the suction cylinder (2) and moves in the up-and-down direction; the driving cylinder (1) is provided with a driving rod (5), the lower end of which extends into the suction cylinder (2) and is connected to the suction piston (4); the upper end of the driving cylinder (1) is provided with a cylinder cover (6) with a spiral hole in the center, the upper section of the driving rod (5) is provided with a spiral section (7) which cooperates with the spiral hole, the spiral section (7) of the driving rod (5) is inserted into the spiral hole, and the upper end of the driving rod (5) is connected to the tail plate (9) via a rotary joint (8); when an axial push-pull force is applied to the driving rod (5) via the tail plate (9), the driving rod (5) and the suction piston (4) can be driven to rotate while moving in the axial direction; The end of the bolt removal tube (3) is provided with a crushing piece (10), and the head end of the bolt removal tube (3) is arranged at the bottom of the suction cylinder (2) and forms a rotational fit with the suction cylinder (2); a rotation transmission component is provided between the bolt removal tube (3) and the suction piston (4), and the rotation transmission component can transmit torque to the bolt removal tube (3) during the lifting and lowering process of the suction piston (4); The rotation transmission assembly comprises a piston hinge (11) arranged at the bottom of the suction piston (4), a tube hinge (12) arranged at the upper end of the bolt removal tube (3), and at least one V-shaped transmission rod (13), wherein the middle section of the transmission rod (13) is hinged, and the upper and lower ends of the transmission rod (13) are respectively hinged to the piston hinge (11) and the tube hinge (12).

2. The pulmonary embolism thrombus removal device according to claim 1, characterized in that: Two transmission rods (13) are provided, and the V-shaped openings of the two transmission rods (13) face inwards and are symmetrically distributed on both sides of the bolt removal tube (3).

3. The pulmonary embolism thrombus removal device according to claim 2, characterized in that: The crushing piece (10) is a spiral elastic wire.

4. The pulmonary embolism thrombus removal device according to claim 3, characterized in that: The crushing member (10) is a lantern-shaped expansion frame.

5. The pulmonary embolism thrombus removal device according to claim 4, characterized in that: A side discharge pipe (14) is provided at the lower part of one side of the suction cylinder (2), and a one-way valve for one-way communication from inside to outside is provided on the side discharge pipe (14).

6. The pulmonary embolism thrombus removal device according to claim 5, characterized in that: The head end of the embolism removal tube (3) is provided with a one-way valve for preventing liquid from flowing from the suction cylinder (2) toward the embolism removal tube (3).

7. The pulmonary embolism thrombus removal device according to claim 6, characterized in that: A gripping drive mechanism is also provided outside the driving cylinder (1), and the gripping drive mechanism comprises two gripping rods (15), the upper ends of the two gripping rods (15) are respectively hinged to two sides of the tail plate (9), and the lower ends are hinged to one end of a short connecting rod (16), and the other end of the short connecting rod (16) is hinged to one side of the lower part of the driving cylinder (1).

8. The pulmonary embolism thrombus removal device according to claim 7, characterized in that: A finger ring (17) for an operator to insert his / her fingers is provided on the middle section of the gripping rod (15).

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