Lantern-shaped pulmonary embolism thrombus cleaning device

Abstract

The invention relates to the technical field of medical treatment. The lantern-shaped 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

[0001] This application is a divisional application. The application date of the original application is October 28, 2024, the application number is 202411510358.9, and the name of the invention is "A pulmonary embolism thrombus cleaning device." Technical Field

[0002] The present invention relates to the field of medical technology, and in particular to a thrombus clearing device. Background Art

[0003] Acute pulmonary embolism is a common cardiovascular disease. 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 from deep vein thrombosis in 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.

[0004] Therefore, how to eliminate thrombi is the core process of the entire treatment process. Currently, common thrombus removal 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 location through the catheter, the stent type expands through its expansion, cutting and breaking the thrombus in the process of expansion (some products have externally driven rotation). The guidewire type penetrates the thrombus through the guidewire, rotates under external drive, and uses the guidewire to break the thrombus. 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.

[0005] However, whether 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 thrombus removal efficiency of the overall product, and since the overall suction and discharge are performed at a unified time node, the risk of blockage is relatively high.

[0006] Therefore, if the thrombus 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

[0007] The purpose of the present invention is to provide a lantern-shaped pulmonary embolism thrombus clearing device that can simultaneously complete crushing and suctioning.

[0008] To achieve the above-mentioned object, the present invention adopts the following technical solution: a lantern-shaped pulmonary embolism thrombus removal device, comprising a drive cylinder, a suction cylinder disposed at the lower end of the drive cylinder and connected to the drive cylinder, and a thrombus removal tube capable of being inserted into the thrombus location through a catheter;

[0009] The suction cylinder is provided with a suction piston that cooperates with the inner cavity of the suction cylinder and moves in the up and down directions; a driving rod is provided inside the driving cylinder, and the lower end of the driving rod extends into the suction cylinder and is connected to the suction piston; the upper end of the driving cylinder is provided with a cylinder cover with a spiral hole in the center, and the upper section of the driving rod is provided with a spiral section that cooperates with the spiral hole, and the spiral section of the driving rod is passed through the spiral hole, and the upper end of the driving rod is connected to the tail plate through a rotary 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;

[0010] The end of the thrombus removal tube is provided with a crushing piece, and the head end of the thrombus removal tube is provided at the bottom of the suction cylinder and forms a rotational fit with the suction cylinder; a rotation transmission component is provided between the thrombus removal tube and the suction piston, and the rotation transmission component can transmit torque to the thrombus removal tube during the lifting and lowering process of the suction piston;

[0011] The rotation transmission component includes a plurality of elastic connecting wires, the upper end of the elastic connecting wires is connected to the bottom of the suction piston, and the lower end is connected to the upper end of the embolism removal tube; the plurality of elastic connecting wires are distributed in a ring-shaped lantern shape around the embolism removal tube.

[0012] Preferably, the breaking piece is a spiral elastic wire.

[0013] Preferably, the crushing member is a lantern-shaped expansion frame.

[0014] 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 the inside to the outside is provided on the side discharge pipe.

[0015] Preferably, the head end of the embolization tube is provided with a one-way valve for preventing the liquid from flowing from the suction cylinder toward the embolization tube.

[0016] 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.

[0017] Preferably, a finger ring for the operator's fingers to penetrate is provided on the middle section of the gripping rod.

[0018] The beneficial effects of the present invention are primarily reflected in its ability to simultaneously perform rotary fragmentation, cutting, and suction of thrombi, significantly improving thrombus removal efficiency while maintaining a simple structure and excellent stability. Specifically, during use, the present invention first installs a catheter and performs routine procedures such as administering thrombolytic drugs through the catheter. The thrombus removal tube is then placed through the catheter at the thrombus location, and the thrombus removal component at the end of the tube is inserted into the thrombus, with the location marked by imaging. Once in position, the drive rod is driven axially upward. This upward movement of the drive rod drives the suction piston upward, generating negative suction. Simultaneously, as the drive rod rises, due to the presence of the spiral segment and spiral hole, it continuously rotates, in turn driving the suction piston, the rotation transmission assembly, and the thrombus removal tube. This, in turn, causes the fragmentation component at the end of the tube to rotate, thereby fragmenting the thrombus. The present invention simultaneously fragments and simultaneously performs suction to remove the fragmented thrombus, significantly improving thrombus removal efficiency and preventing secondary accumulation of fragmented thrombus, significantly reducing the risk of tube blockage. Furthermore, the present invention has a simple and compact overall structure and utilizes a passive mechanical drive, significantly reducing medical costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0021] Figure 3 for Figure 1 Enlarged view of part B in the middle. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings. The embodiments described are only part of the embodiments of the present invention, rather than all 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.

[0023] The present invention aims to provide a lantern-shaped pulmonary embolism thrombus removal device that can follow the catheter placement into the thrombus site within the blood vessel and, in conjunction with imaging, rapidly and in real time remove the thrombus. It has dual functions of fragmentation and aspiration, and can achieve simultaneous fragmentation and aspiration. Furthermore, due to its passive mechanical drive, it boasts a simple and compact overall structure and low manufacturing costs, significantly reducing medical costs.

[0024] 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 FIG, for simplicity of illustration, the thrombectomy tube 3 is shown shorter; in actual operation, its proportions can be designed as needed. The present invention comprises a drive cylinder 1, a suction cylinder 2 disposed at the lower end of the drive cylinder 1 and connected to the drive cylinder 1, and a thrombectomy tube 3 that can be placed at the location of a thrombus through a catheter.

[0025] As the active motion drive device of the present invention, the suction cylinder 2 is provided with a suction piston 4 that moves vertically in conjunction with the inner cavity of the suction cylinder 2. A drive rod 5 is provided within the drive cylinder 1 (for driving the suction piston 4 to rise, fall, and rotate). The lower end of the drive rod 5 extends into the suction cylinder 2 and is connected to the suction piston 4. The vertical movement of the drive rod 5 drives the suction piston 4 up and down.

[0026] To synchronously drive the suction piston 4 in rotation, the upper end of the drive cylinder 1 is provided with a cylinder cap 6 having a spiral hole in the center. The upper section of the drive rod 5 is provided with a spiral section 7 that cooperates with the spiral hole. The spiral section 7 of the drive rod 5 is inserted into the spiral hole, thereby enabling the drive rod 5 to rotate during axial movement. At the same time, the upper end of the drive rod 5 of the present invention is connected to the tail plate 9 via a rotary joint 8. The drive rod 5 is driven by pushing and pulling the tail plate 9. The rotary joint 8 can release the rotational force generated during the raising and lowering of the drive rod 5, preventing the operating end (tail plate 9) from being affected by the rotation.

[0027] Through the above-described structure, the present invention can simultaneously drive the drive rod 5 and the suction piston 4 to rotate while simultaneously moving axially when an axial push-pull force is applied to the drive rod 5 via the tail plate 9. Of course, for even more convenient operation, a ring can be provided on the tail plate 9 to facilitate pushing and pulling. This structure is the simplest, but since the tail plate 9 must be pushed and pulled while the drive cylinder 1 must be stabilized, it often requires two hands to operate.

[0028] Therefore, a better approach of the present invention may be to achieve convenient one-handed operation through structural design, such as Figure 1 As shown in FIG, the drive cylinder 1 is also provided with a pinch drive mechanism. This mechanism comprises two pinch levers 15. The upper ends of the two pinch levers 15 are hinged to either side 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 portion of the drive cylinder 1. By pinching and releasing the pinch levers 15, operation can be achieved with one hand. A finger ring 17 is provided in the middle of the pinch lever 15 for the operator's finger to penetrate. This allows the operator to control the pinching and release of the pinch lever 15.

[0029] The thrombus removal tube 3 of the present invention is provided with a breaker 10 at its distal end. The head of the thrombus removal tube 3 is positioned at the bottom of the suction cylinder 2 and forms a rotational engagement with the latter, meaning it is rotatable. A rotation transmission assembly is provided between the thrombus removal tube 3 and the suction piston 4. This rotation transmission assembly transmits the rotation of the suction piston 4 to the thrombus removal tube 3. However, since the suction piston 4 can be raised or lowered, torque is transmitted to the thrombus removal tube 3 during the raising and lowering of the suction piston 4. To achieve the aforementioned functions, the present invention briefly describes two different rotation transmission assembly structures. Of course, various configurations and structural designs are feasible as long as they achieve the same effect.

[0030] 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 thrombus removal tube 3. The plurality of elastic connecting wires are distributed in a ring-shaped lantern shape around the thrombus 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 adapt to the bending and stretching during the lifting and lowering of the suction piston 4. 2. Figure 3 In the structure shown in FIG, the rotation transmission assembly includes a piston hinge 11 disposed at the bottom of the suction piston 4, a tube hinge 12 disposed 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 hinged to the piston hinge 11 and tube hinge 12, respectively. In this case, two transmission rods 13 are generally provided, with the V-shaped openings of the two transmission rods 13 facing inward and symmetrically distributed on both sides of the thrombus removal tube 3 to ensure balance and reliability.

[0031] 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 inside the catheter, it can maintain linearity to facilitate insertion, and after being discharged from the catheter, it can elastically return to its spiral shape. Of course, it is also feasible to use memory alloy materials for production. In addition to the above method, the crushing member 10 of the present invention can also be a lantern-shaped expansion frame, which is composed of multiple crushing wires distributed in the shape of a lantern skeleton. It can also be bundled into a linear shape inside the catheter to facilitate insertion.

[0032] In addition, to discharge the thrombus and fluid drawn into the suction cylinder 2, a side discharge tube 14 is provided at the lower portion of one side of the suction cylinder 2. A one-way valve is provided on the side discharge tube 14, ensuring one-way communication from the inside to the outside. To simultaneously control backflow from the thrombus removal tube 3, a one-way valve is provided at the tip of the thrombus removal tube 3 to prevent fluid from flowing from the suction cylinder 2 toward the thrombus removal tube 3.

[0033] The above embodiments are merely preferred embodiments of the present invention. Those skilled in the art may make appropriate modifications to the technical solutions provided by the present invention based on practical engineering practices. Such modifications and equivalent transformations 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 appended claims.

Claims

1. A lantern-shaped pulmonary embolism thrombus removal device, characterized by: The invention 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) capable of being placed at the location of a thrombus through a catheter; The suction cylinder (2) is provided with a suction piston (4) that matches the inner cavity of the suction cylinder (2) and moves in the up and down directions; the driving cylinder (1) is provided with a driving rod (5), the lower end of the driving rod (5) 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) that matches the spiral hole, the spiral section (7) of the driving rod (5) is passed through the spiral hole, and the upper end of the driving rod (5) is connected to the tail plate (9) through a rotary joint (8); when an axial push-pull force is applied to the driving rod (5) through 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 provided 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 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 embolism removal tube (3); the plurality of elastic connecting wires are distributed in a ring-shaped lantern shape around the embolism removal tube (3).

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

3. The lantern-shaped pulmonary embolism thrombus removal device according to claim 2, characterized in that: The crushing piece (10) is a lantern-shaped expansion frame.

4. The lantern-shaped pulmonary embolism thrombus removal device according to claim 3, characterized in that: A side discharge pipe (14) is provided at the lower portion 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).

5. The lantern-shaped pulmonary embolism thrombus removal device according to claim 4, 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).

6. The lantern-shaped pulmonary embolism thrombus removal device according to claim 5, characterized in that: A pinching drive mechanism is also provided outside the driving cylinder (1), and the pinching drive mechanism 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).

7. The lantern-shaped pulmonary embolism thrombus removal device according to claim 6, characterized in that: A finger ring (17) for the operator's fingers to penetrate is provided on the middle section of the gripping rod (15).

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