Pulmonary embolism thrombus cleaning device

Abstract

The invention relates to the technical field of medical treatment. The pulmonary embolism thrombus cleaning device comprises a driving cylinder, a suction cylinder arranged at the lower end of the driving cylinder and communicated with the driving cylinder, and a thrombus removing pipe capable of being placed in the thrombus position through a catheter. A suction piston which is matched with an inner cavity of the suction cylinder and moves in the vertical direction is arranged in the suction cylinder. A driving rod is arranged in the driving cylinder, and the lower end of the driving rod extends into the suction cylinder and is connected with the suction piston; the upper end of the driving cylinder is provided with a cylinder cover with a spiral hole in the center, the upper section of the driving rod is provided with a spiral section matched with the spiral hole, the spiral section of the driving rod is arranged in the spiral hole in a penetrating mode, and the upper end of the driving rod is connected with the tail plate through a rotating connector; the thrombus removing device can conduct rotary crushing cutting and suction on thrombus at the same time, the thrombus removing efficiency is greatly improved, and meanwhile the thrombus removing device is simple in structure and good in stability.

Description

Technical Field

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

[0002] Acute pulmonary embolism is a common cardiovascular disease currently. It is a clinical and pathophysiological syndrome of pulmonary circulation disorder caused by the detachment of endogenous or exogenous thrombi (deep vein thrombosis is the main source of thrombi that cause pulmonary thromboembolism, often caused by the detachment of thrombi formed in deep vein thrombosis of the lower limbs) blocking the pulmonary artery. It has an extremely high mortality rate and seriously endangers the health and quality of life of patients.

[0003] Therefore, how to eliminate thrombi is the core process of the entire treatment process. At present, common thrombus clearing devices include two categories: stent type and guidewire type. Both the former and the latter construct a filter at the distal end. After the device reaches the thrombus position through the catheter, the stent type expands through its expansion, and cuts and breaks the thrombus in the process of expansion (some products have external drive rotation). The guidewire type penetrates the thrombus through the guidewire, rotates under external drive, and breaks the thrombus with the guidewire; the broken thrombus blocks are blocked by the filter, and finally the broken thrombus fragments are sucked out with the external suction equipment to achieve the effect of thrombus removal.

[0004] However, no matter it is a stent type or a guidewire type, it is necessary to cooperate with an external active suction device to suck out the thrombus after the thrombus is broken. It is impossible to directly suck out the thrombus during the cutting and breaking process. This leads to a low efficiency of thrombus removal for the overall product, and because the overall suction and discharge is performed at a unified time node, the risk of blockage is relatively high.

[0005] Therefore, if the blood clots can be simultaneously aspirated and discharged in the process of breaking up the thrombus in a simple way, the efficiency of thrombus removal will be greatly improved and the risk of tube blockage will be reduced. Summary of the invention

[0006] The purpose of the present invention is to provide a pulmonary embolism thrombus clearing device which can simultaneously complete crushing and suction.

[0007] To achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a pulmonary embolism thrombus removal device, comprising a driving cylinder, a suction cylinder arranged at the lower end of the driving cylinder and connected to the driving cylinder, and a thrombus removal tube that can be inserted into the thrombus position through a catheter;

[0008] The suction cylinder is provided with a suction piston which matches with the inner cavity of the suction cylinder and moves in the up-and-down direction; the driving cylinder is provided with a driving rod inside, the lower end of which extends into the suction cylinder and is connected with the suction piston; the upper end of the driving cylinder is provided with a cylinder cover with a spiral hole in the center, the upper section of the driving rod is provided with a spiral section which matches with the spiral hole, the spiral section of the driving rod is passed through the spiral hole, and the upper end of the driving rod is connected with the tail plate through a rotating joint; when an axial push-pull 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 in the axial direction;

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

[0010] Preferably, the rotation 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 ends of the embolism removing tubes; the plurality of elastic connecting wires are distributed in a ring-shaped lantern shape around the embolism removing tube.

[0011] Preferably, the rotation 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 embolism removal tube, and at least one V-shaped transmission rod, the middle section of the transmission rod is hinged, and the upper and lower ends of the transmission rod are respectively hinged to the piston hinge joint and the tube hinge joint.

[0012] Preferably, two transfer rods are provided, and the V-shaped openings of the two transfer rods face inwards and are symmetrically distributed on both sides of the embolism removal tube.

[0013] Preferably, the breaking piece is a spiral elastic wire.

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

[0015] Preferably, a side discharge pipe is provided at the lower portion of one side of the suction cylinder, and a one-way valve for one-way communication from inside to outside is provided on the side discharge pipe.

[0016] Preferably, the head end of the embolism removal tube is provided with a one-way valve for preventing the liquid from flowing from the suction cylinder toward the embolism removal tube.

[0017] Preferably, a pinching drive mechanism is further provided outside the driving cylinder, and the pinching drive mechanism includes two pinching rods, the upper ends of the two pinching rods are respectively hinged to the two sides of the tail plate, and 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, a finger ring for the operator to insert his fingers is provided on the middle section of the gripping rod.

[0019] The beneficial effects of the present invention are concentrated in that it can simultaneously perform the rotational crushing, cutting and suction of the thrombus, which greatly improves the efficiency of thrombus removal, and at the same time, it has a simple structure and good stability. Specifically, during the use of the present invention, the catheter is first placed, and the conventional operation such as the introduction of thrombolytic drugs is performed through the catheter; then the thrombus removal tube is placed into the thrombus position through the catheter, and the thrombus removal piece at the end of the thrombus removal tube penetrates the thrombus, and cooperates with the imaging marking position. After it is in place, the driving rod is driven to move upward along the axial direction, and the rising of the driving rod drives the suction piston to rise, thereby generating a negative pressure suction force. At the same time, during the rising process of the driving rod, due to the presence 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 turn, and the crushing piece at the end of the thrombus removal tube rotates, and then the thrombus is cut and crushed. The present invention can simultaneously perform the suction operation to suck out the broken thrombus block while crushing, which greatly improves the efficiency of thrombus removal, and can avoid the secondary accumulation of the broken thrombus block, greatly reducing the risk of tube blockage. In addition, the overall structure of the present invention is simple and compact, and it uses passive mechanical drive, which can greatly reduce medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 3 for Figure 1 Enlarged view of part B in the middle. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings. The embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments, and are intended to provide those skilled in the art with better implementation in engineering rather than to limit the use of the present invention.

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

[0025] The present invention comprises a main body and a thrombus removal tube, wherein the main body serves as an operating end and the thrombus removal tube is placed into the thrombus site via a catheter. Figure 1As shown in the figure, the length of the thrombus removal tube 3 is shown to be shorter in order to simplify the diagram. In actual operation, its proportion can be designed as needed. The present invention comprises a driving cylinder 1, a suction cylinder 2 disposed 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 placed at the thrombus position through a catheter.

[0026] As the active motion driving device of the present invention, the suction cylinder 2 of the present invention is provided with a suction piston 4 that moves in the up and down direction and cooperates with the inner cavity of the suction cylinder 2. The driving cylinder 1 is provided with a driving rod 5 (for driving the suction piston 4 to rise and fall and rotate), the lower end of the driving rod 5 extends into the suction cylinder 2 and is connected to the suction piston 4, and the lifting and lowering drive of the suction piston 4 is realized by the up and down movement of the driving rod 5.

[0027] In order to synchronously realize the rotational drive of 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, and the upper section of the driving rod 5 is provided with a spiral section 7 that matches the spiral hole. The spiral section 7 of the driving rod 5 is inserted into the spiral hole, so that the driving rod 5 can realize rotation during the axial movement. 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 rotating joint 8, and the driving of the driving rod 5 is realized by pushing and pulling the tail plate 9. The rotating joint 8 can release the rotational force generated during the lifting and lowering of the driving rod 5 to prevent the operating end (tail plate 9) from being affected by the rotation.

[0028] Through the above structure, when the axial push-pull force is applied to the driving rod 5 through the tail plate 9, the present invention can drive the driving rod 5 and the suction piston 4 to rotate while moving in the axial direction. Of course, in order to facilitate the operation, a ring body can be provided on the tail plate 9 to facilitate pushing and pulling. This structure is the simplest, but because the tail plate 9 needs to be pushed and pulled on the one hand, and the driving cylinder 1 needs to be stabilized on the other hand, it often requires two-handed operation.

[0029] To this end, a better approach of the present invention may also be to achieve convenient one-handed operation through structural design, such as Figure 1 As shown in the figure, the driving cylinder 1 is also provided with a pinching driving mechanism, which includes two pinching rods 15, the upper ends of the two pinching rods 15 are respectively hinged to the 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. By pinching and relaxing the pinching rod 15, the operation can be achieved in a single-handed holding state. The middle section of the pinching rod 15 is provided with a finger ring 17 for the operator's finger to penetrate, and the doctor's finger is inserted once to facilitate the control of the pinching and relaxation of the pinching rod 15.

[0030] The end of the bolt removal tube 3 of the present invention is provided with a crushing piece 10, and the head end of the bolt removal tube 3 is provided at the bottom of the suction cylinder 2, and forms a rotational fit with the suction cylinder 2, that is, it is in a rotatable state. A rotation transmission component is provided between the bolt removal tube 3 and the suction piston 4, and the rotation transmission component can transmit the rotation of the suction piston 4 to the bolt removal tube 3, but because the suction piston 4 has a lifting state, that is, the torque is transmitted to the bolt removal tube 3 during the lifting process of the suction piston 4. In order to achieve the above functions, the present invention simply describes two different rotation transmission component structures here. Of course, more forms and structural designs are feasible as long as they can achieve the same effect.

[0031] Two types of rotation transmission component structures: 1. The rotation transmission component includes a plurality of elastic connecting wires, the upper end of which is connected to the bottom of the suction piston 4, and the lower end is connected to the upper end of the plug removal tube 3. The plurality of elastic connecting wires are distributed in a ring-shaped lantern shape around the plug removal tube 3. In other words, the elastic connecting wires are distributed in the shape of a lantern frame, which has a certain degree of flexibility and can bend and stretch adaptively during the lifting and lowering of the suction piston 4. 2. Figure 3 In the structure shown in the figure, the rotation transmission assembly includes a piston hinge 11 arranged at the bottom of the suction piston 4, a tube hinge 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 11 and the tube hinge 12. In this case, generally, 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 thrombus removal tube 3 to ensure balance and reliability.

[0032] Regarding the specific form of the crushing piece 10 of the present invention, it can be that the crushing piece 10 is a spiral elastic wire. When in the catheter, it can maintain linearity to facilitate 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 memory alloy materials for production. In addition to the above method, the crushing piece 10 of the present invention can also be that the crushing piece 10 is a lantern-shaped expansion frame, which is composed of a plurality of crushing wires distributed in the shape of a lantern skeleton, and it can also be bundled into a linear shape in the catheter to facilitate insertion.

[0033] In addition, in order to discharge the thrombus and liquid sucked into the suction cylinder 2, a side discharge tube 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 tube 14. In order to simultaneously realize the backflow control at the embolization tube 3, a one-way valve can be provided at the head end of the embolization tube 3 to prevent the liquid from flowing from the suction cylinder 2 to the embolization tube 3.

[0034] The above embodiments are only preferred embodiments of the present invention. Those skilled in the art may make appropriate modifications to the technical solutions provided by the present invention according to actual engineering practices, and the modifications and equivalent transformations made shall not depart from the scope of protection claimed by the present invention. The scope of rights claimed by the present invention shall be subject to the attached 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) which 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).

2. The pulmonary embolism thrombus removal device according to claim 1, characterized in that: The rotation transmission component comprises a plurality of elastic connecting wires, the upper end of the elastic connecting wires being connected to the bottom of the suction piston (4), and the lower end being connected to the upper end of the embolism removing tube (3); the plurality of elastic connecting wires are distributed in a ring-shaped lantern shape around the embolism removing tube (3).

3. The pulmonary embolism thrombus removal device according to claim 1, characterized in that: 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 thrombus 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).

4. The pulmonary embolism thrombus removal device according to claim 3, 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 thrombus removal tube (3).

5. The pulmonary embolism thrombus removal device according to claim 1, characterized in that: The crushing piece (10) is a spiral elastic wire.

6. The pulmonary embolism thrombus removal device according to claim 1, characterized in that: The crushing member (10) is a lantern-shaped expansion frame.

7. The pulmonary embolism thrombus removal device according to claim 6, 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).

8. The pulmonary embolism thrombus removal device according to claim 7, 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).

9. The pulmonary embolism thrombus removal device according to claim 1, 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 the 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).

10. The pulmonary embolism thrombus removal device according to claim 9, characterized in that: A finger ring (17) for an operator to insert his fingers is arranged on the middle section of the gripping rod (15).

Images