A cardiovascular medicine clinical puncture device and a use method thereof

Abstract

The application discloses a cardiovascular internal medicine clinical puncture device and a use method, relates to the field of medical devices, and comprises a support and a cylinder body in communication with a puncture needle tube, a partition plate is arranged in clamping mode on the inner wall of the cylinder body, and a discharge pipe is in communication with the outer surface of the cylinder body; the cardiovascular internal medicine clinical puncture device and the use method can move the internal sealing plate of the regulating assembly along the inner wall of the guide rail under force, can open or close the two sides of the piston plate, can change the volume of the sealing cavities on the two sides of the piston plate, can realize uniform and uninterrupted extraction of the liquid in the cavity, do not need to repeatedly pull down the syringe to discharge the accumulated liquid, simplify the overall operation process, and can realize continuous liquid discharge operation.

Description

Technical Field

[0001] This invention relates to medical device technology, specifically to a cardiovascular clinical puncture device and its usage method. Background Technology

[0002] In cardiovascular clinical practice, a large number of patients develop pericardial effusion or even cardiac tamponade due to pericarditis, postoperative complications of heart surgery, tumors, etc., and urgently need to be drained and decompressed by pericardiocentesis. Antibiotics, anti-inflammatory drugs or chemotherapy drugs are given after or during drainage.

[0003] The current routine clinical procedure involves inserting a puncture needle or indwelling catheter into the pericardial cavity under ultrasound guidance, while the physician manually aspirates the effusion repeatedly using a large-volume syringe. When medication needs to be injected into the pericardial cavity, aspiration must be stopped, the syringe removed from the drainage port, and replaced with a syringe containing medication before administration. After administration, the syringe is removed again, and the drainage device is reconnected for continued aspiration. This intermittent "aspiration-stop-injection-re-aspiration" procedure has the following significant drawbacks: Existing equipment requires the syringe to be removed after each drainage of fluid, which is cumbersome and cannot achieve continuous drainage. At the same time, when medication needs to be injected, the puncture needle must be removed first, and then the medication must be injected with a syringe, which results in the patient needing to undergo multiple punctures, increasing the number of punctures during the treatment process. Therefore, a cardiovascular clinical puncture device and its usage method have been developed. Summary of the Invention

[0004] The purpose of this invention is to provide a cardiovascular clinical puncture device to address the aforementioned shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cardiovascular clinical puncture device, including a stent and a cylinder communicating with a puncture needle tube, wherein a partition plate is snapped onto the inner wall of the cylinder and an outlet tube communicating with the outer surface of the cylinder. The control component, which is slidably disposed on the inner wall of the cylinder, includes a sealing plate, a slider, a piston plate and a guide rail; The sliders are symmetrically arranged on both sides of the sealing plate and are slidably connected to the inner wall of the guide rail. The guide rail is opened on the inner wall of the piston plate. When the sealing plate is subjected to force, it moves along the inner wall of the guide rail, causing the two sides of the piston plate to open or close, changing the volume of the sealing cavities on both sides of the piston plate 27, and is used to extract the liquid inside the cavity at a uniform speed without interruption. A switching assembly, which is assembled at the lower end of the cylinder, includes a round tube, a docking hole, a connecting hole, and a switching rod; The docking hole is connected to the outer surface of the circular tube, and the connecting hole is symmetrically arranged on one side of the outer surface of the circular tube. The switching rod is slidably disposed on the inner wall of the ring. The connection state of the docking hole and the connecting hole is switched synchronously by the movement of the switching rod, which is used for rapid switching between liquid extraction and drug injection operations.

[0006] As a further optimization of the present invention, the control component further includes a push-pull rod that is slidably connected to the inner wall of the partition plate, the end of the push-pull rod is snapped with a push-pull plate, and the inner cavity of the push-pull rod is slidably provided with a drive rod.

[0007] As a further optimization of the present invention, the outer surface of the push-pull rod is uniformly provided with multiple sets of movable grooves; The end of the drive rod is fitted with a movable block, and the outer surface of the movable block is fixedly fitted with a movable rod corresponding to the movable groove. The outer surface of the movable rod is slidably connected to the inner wall of the movable groove.

[0008] As a further optimization of the present invention, a limiting rod is rotatably provided at the end of the moving rod, and the end of the limiting rod is rotatably connected to the end of the sealing plate.

[0009] As a further optimization of the present invention, a pressure plate is provided at the lower end of the piston plate, and the end of the pressure plate is in contact with the end of the sealing plate.

[0010] As a further optimization of the present invention, the cross-section of the guide rail is L-shaped.

[0011] As a further optimization of the present invention, the switching component further includes a snap-fit ​​block that snaps into the bracket, and the end of the snap-fit ​​block is connected to the end of the circular tube.

[0012] As a further optimization of the present invention, a switching groove is formed on the outer surface of the switching rod.

[0013] As a further optimization of the present invention, the end of the snap-fit ​​block is provided with a snap-fit ​​groove, and a locking block is slidably provided on the inner wall of the snap-fit ​​groove, and the end of the locking block is snapped with the outer surface of the switching rod.

[0014] A cardiovascular clinical puncture method, using the puncture device as described in any one of claims 1-9, the puncture method comprising the following steps: S1. First, insert the puncture needle into the patient's pericardial cavity according to the positioning, and keep the puncture needle connected to the round tube of the device. At this time, push the locking block to release the locking of the switching rod, slide the switching rod to connect the switching groove to the docking hole where the puncture needle is located and the connection hole on the aspiration side. Then push the locking block to lock the switching rod again to keep the aspiration path stable and connected. S2. Then pull the push-pull plate to move the push-pull rod and piston plate to the outside of the cylinder. At this time, negative pressure is formed at the puncture needle and the aspiration path, and the pericardial effusion is drawn into the sealed cavity formed by the piston plate and the cylinder. S3. Then push the drive rod to reset, pull the sealing plate to close and release the seal, and push the push-pull plate again to move the piston plate inward, pushing the pericardial effusion inside the sealing cavity through the discharge tube to the external collection container; S4. When it is necessary to inject medication into the patient's pericardial cavity, push the locking block to unlock it, slide the switching rod to change the position of the switching slot so that the docking hole is connected to the injection side connection hole, push the locking block to lock the switching rod again, and at this time the medication container pre-connected to the injection side connection hole can be directly injected into the pericardial cavity through the puncture needle.

[0015] Compared with the prior art, the cardiovascular clinical puncture device and its usage method provided by the present invention have the following beneficial effects: By adjusting the force on the internal sealing plate of the component and moving it along the inner wall of the guide rail, the two sides of the piston plate can be opened or closed, thereby changing the volume of the sealing chambers on both sides of the piston plate. This allows for the uniform and continuous extraction of liquid from the chamber without having to repeatedly remove the syringe to drain the accumulated liquid, simplifying the overall operation process and enabling continuous liquid drainage.

[0016] Simultaneously, by moving the switching rod in the switching component, the connection state of the docking hole and different connection holes can be switched synchronously, enabling quick switching between fluid aspiration and drug injection operations. When drug injection is needed, there is no need to remove the puncture needle and re-puncture, reducing the number of punctures suffered by the patient, reducing operational risks and patient pain, and making the overall operation more convenient and safer. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the control component structure provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the control component provided in an embodiment of the present invention; Figure 4 An exploded view of the control component structure provided in an embodiment of the present invention; Figure 5 for Figure 4 Enlarged view of the A-structure; Figure 6 This is a schematic diagram of the switching component structure provided in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the switching component structure provided in an embodiment of the present invention; Figure 8 This is an exploded view of the switching component structure provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Bracket; 2. Control component; 3. Switching component; 11. Cylinder; 12. Partition plate; 13. Discharge pipe; 21. Push-pull plate; 22. Push-pull rod; 221. Movable groove; 23. Drive rod; 24. Moving block; 241. Moving rod; 25. Limiting rod; 26. Sealing plate; 261. Slider; 27. Piston plate; 271. Guide rail; 28. Pressure plate; 31. Snap-fit ​​block; 311. Snap-fit ​​groove; 32. Round tube; 33. Docking hole; 34. Connection hole; 35. Switching rod; 36. Switching groove; 37. Locking block. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Example: Please refer to Figure 1 - Figure 8 A cardiovascular clinical puncture device includes a stent 1, a cylinder 11 connected to a puncture needle tube, a partition plate 12 snapped into the inner wall of the cylinder 11, and an outlet tube 13 connected to the outer surface of the cylinder 11.

[0022] In this design, the bracket 1 supports and fixes the cylinder 11. The cylinder 11 is separated into an independent suction chamber by the partition plate 12. The extracted pericardial effusion can be directly transported to an external collection container through the discharge tube 13 without repeatedly disassembling the device to drain the effusion.

[0023] The inner cavity of the discharge tube 13 is equipped with a one-way valve to prevent the extracted fluid from flowing back into the pericardial cavity and to ensure the safety of the fluid extraction process.

[0024] Furthermore, the control component 2, which is slidably disposed on the inner wall of the cylinder 11, includes a sealing plate 26, a slider 261, a piston plate 27, and a guide rail 271. The slider 261 is symmetrically disposed on both sides of the sealing plate 26 and is fitted and slidably connected to the inner wall of the guide rail 271. The guide rail 271 is opened on the inner wall of the piston plate 27. When the sealing plate 26 is subjected to force and moves along the inner wall of the guide rail 271, the two sides of the piston plate 27 open or close, changing the volume of the sealing cavity on both sides of the piston plate 27, for uniformly and continuously extracting the liquid inside the cavity.

[0025] In this embodiment, when it is necessary to drain pericardial effusion, the sealing cavities on both sides of the piston plate 27 are in a closed state in the initial state; when the piston plate 27 is stretched outward of the cylinder 11 as a whole, a negative pressure is formed at the puncture needle tube, thereby drawing the pericardial effusion into the sealing cavity formed between the cylinder 11 and the piston plate 27.

[0026] The sealing plate 26 is then pushed to slide along the guide rail 271, causing the two sides of the piston plate 27 to contract and connect. The piston plate 27 is then moved downwards to a suitable position, and the sealing plate 26 is reopened, restoring the closed state of the two sides of the piston plate 27. During the stretching process, the piston plate 27 squeezes the accumulated fluid in the sealing cavity to the discharge tube 13 and simultaneously pushes it into the external collection container. This process allows for continuous fluid aspiration without disassembling the puncture needle and syringe, making the aspiration process smoother and more stable.

[0027] Furthermore, the control component 2 also includes a push-pull rod 22 that is slidably connected to the inner wall of the partition plate 12. The end of the push-pull rod 22 is snapped with a push-pull plate 21, and the inner cavity of the push-pull rod 22 is slidably provided with a drive rod 23.

[0028] Specifically, the push-pull plate 21 is located outside the cylinder 11, which is convenient for medical personnel to operate. By driving the push-pull plate 21, the push-pull rod 22 slides along the inner wall of the partition plate 12, thereby driving the piston plate 27 to move inside the cylinder 11, completing the power output for liquid suction and drainage.

[0029] Furthermore, multiple sets of movable grooves 221 are evenly opened on the outer surface of the push-pull rod 22; a movable block 24 is snapped onto the end of the drive rod 23, and a movable rod 241 corresponding to the movable groove 221 is fixedly installed on the outer surface of the movable block 24. The outer surface of the movable rod 241 is fitted and slidably connected to the inner wall of the movable groove 221.

[0030] Specifically, the end of the push-pull rod 22 is engaged with the end of the piston plate 27. The overall movement of the push-pull rod 22 drives the piston plate 27 to complete the extension and retraction movement. The relative movement of the drive rod 23 in the inner cavity of the push-pull rod 22 drives the moving rod 241 to slide along the movable groove 221 through the moving block 24, thereby causing the limiting rod 25 to deflect, providing power for the movement of the sealing plate 26, and realizing the power separation of the pumping action.

[0031] When the drive rod 23 moves, it synchronously drives the moving block 24 to slide within the cavity of the push-pull rod 22.

[0032] Furthermore, a limiting rod 25 is rotatably provided at the end of the moving rod 241, and the end of the limiting rod 25 is rotatably connected to the end of the sealing plate 26.

[0033] Specifically, when the moving rod 241 moves along the movable groove 221 toward the sealing plate 26, the limiting rod 25 pushes the sealing plate 26 to slide outward along the guide rail 271 on the inner wall of the piston plate 27, thereby forming a complete sealing surface on the piston plate 27; conversely, when the moving rod 241 moves in the opposite direction, the limiting rod 25 pulls the sealing plate 26 toward the center to retract, releasing the sealing state of the piston plate 27.

[0034] Furthermore, a pressure plate 28 is provided at the lower end of the piston plate 27, and the end of the pressure plate 28 is in contact with the end of the sealing plate 26.

[0035] Specifically, the pressure plate 28 is connected to the piston plate 27 through an elastic element. When the sealing plate 26 is fully extended, the elastic element drives the pressure plate 28 to fit against the end of the sealing plate 26, sealing the sliding gap of the sealing plate 26, improving the overall sealing performance of the piston plate 27, avoiding the problem of negative pressure leakage, and ensuring the stability of liquid pumping.

[0036] Furthermore, the cross-section of guide rail 271 is L-shaped.

[0037] Specifically, the L-shaped guide rail 271 structure can limit the sliding stroke of the slider 261, and at the same time support the end of the sealing plate 26, preventing the sealing plate 26 from tilting and wobbling after unfolding, ensuring the overall stability of the sealing plate 26 and piston plate 27, and improving the reliability of the structure operation.

[0038] Furthermore, the switching component 3, which is assembled at the lower end of the cylinder 11, includes a circular tube 32, a docking hole 33, a connecting hole 34, and a switching rod 35. The docking hole 33 is connected to the outer surface of the circular tube 32, and the connecting hole 34 is symmetrically arranged on one side of the outer surface of the circular tube 32. The switching rod 35 is slidably disposed on the inner wall of the ring 32. The connection state of the docking hole 33 and the connecting hole 34 is switched synchronously by the movement of the switching rod 35, which is used for rapid switching between liquid extraction and drug injection operations.

[0039] Specifically, the circular tube 32 is connected between the lower end of the cylinder 11 and the puncture needle tube. When the switching rod 35 slides to the corresponding position, the switching groove 36 is connected to the docking hole 33 and one of the connecting holes 34. At this time, the puncture needle tube is connected to the liquid extraction chamber of the cylinder 11, and the liquid extraction operation can be performed.

[0040] When medication needs to be injected, slide the switching lever 35 to connect the switching slot 36 with the docking hole 33 and another connecting hole 34. The other end of the connecting hole 34 is pre-connected to a medication container containing the medication. At this time, the medication can be directly injected into the pericardial cavity through the puncture needle tube. There is no need to remove the puncture needle to replace the device or repeatedly disassemble the syringe. The switching between fluid aspiration and medication injection can be completed quickly, greatly reducing the number of operation steps and reducing patient discomfort.

[0041] Furthermore, the switching component 3 also includes a snap-fit ​​block 31 that snaps into the bracket 1, with the end of the snap-fit ​​block 31 connected to the end of the round tube 32.

[0042] Specifically, the locking block 31 serves to fix and limit the circular tube 32, ensuring the stability of the connection between the circular tube 32 and the support 1, and preventing the circular tube from shaking or shifting during the operation of the device, which would affect the accuracy of the puncture position.

[0043] Furthermore, a switching groove 36 is provided on the outer surface of the switching lever 35.

[0044] Specifically, the switching slot 36 can change its connection position as the switching rod 35 moves, thereby realizing the switching of different docking holes 33 and connecting holes 34. The operation path can be switched with a single slide.

[0045] Furthermore, the end of the snap-fit ​​block 31 is provided with a snap-fit ​​groove 311, and a locking block 37 is slidably provided on the inner wall of the snap-fit ​​groove 311. The end of the locking block 37 is snapped with the outer surface of the switching rod 35.

[0046] Specifically, the locking block 31 locks and positions the switching rod 35 after the switching is completed by the locking block 37, so as to prevent the switching rod 35 from being displaced during the operation, ensure the stability of the connection path, prevent the switching state from changing unexpectedly, and ensure that the operation process is safe and controllable.

[0047] Working principle: When using this device for puncture, first insert the puncture needle into the patient's pericardial cavity according to the positioning, and keep the puncture needle connected to the circular tube 32 of the device. At this time, push the locking block 37 to release the lock on the switching rod 35, slide the switching rod 35 to connect the switching groove 36 to the docking hole 33 where the puncture needle is located and the connection hole 34 on the aspiration side. Then push the locking block 37 to lock the switching rod 35 again, so that the aspiration path remains stable and connected.

[0048] At this time, the control device performs the liquid pumping operation: In the initial state, the drive rod 23 is in the initial position inside the push-pull rod 22. At this time, the moving rod 241 drives the limiting rod 25 to pull the sealing plate 26 to the center of the piston plate 27, and the sealing cavity of the piston plate 27 is in the open state.

[0049] Then, the push-pull plate 21 is pushed to move the push-pull rod 22 into the cylinder 11, so that the piston plate 27 moves to the end of the stroke inside the cylinder 11. Then, the drive rod 23 is pulled to move outward, which drives the moving block 24 and the moving rod 241 to move outward synchronously. At this time, the moving rod 241 pushes the sealing plate 26 to slide outward along the guide rail 271 through the limiting rod 25, and cooperates with the pressure plate 28 to complete the seal, so that the piston plate 27 forms a complete sealing surface.

[0050] Then, pulling the push-pull plate 21 causes the push-pull rod 22 and the piston plate 27 to move outward of the cylinder 11. At this time, a negative pressure is formed at the puncture needle and the aspiration path, drawing the pericardial effusion into the sealed cavity formed by the piston plate 27 and the cylinder 11.

[0051] Then push the drive rod 23 to reset, pull the sealing plate 26 to close and release the seal, and push the push-pull plate 21 again to move the piston plate 27 inward. This will push the pericardial effusion inside the sealed cavity through the discharge tube 13 to the external collection container. Repeating the above operation will achieve continuous and uninterrupted drainage without having to repeatedly disassemble the device to drain the effusion.

[0052] When medication needs to be injected into the patient's pericardial cavity, push the locking block 37 to unlock it, slide the switching rod 35 to change the position of the switching slot 36 so that the docking hole 33 connects with the injection side connection hole 34, push the locking block 37 to lock the switching rod 35 again. At this time, the medication container pre-connected to the injection side connection hole 34 can be injected directly into the pericardial cavity through the puncture needle. The quick switching between fluid aspiration and medication injection can be completed without removing the puncture needle to change the device. After the operation is completed, the puncture needle can be removed.

[0053] A cardiovascular clinical puncture method, using any of the above-mentioned puncture devices, includes the following steps: S1. First, insert the puncture needle into the patient's pericardial cavity according to the positioning, and keep the puncture needle connected to the round tube 32 of the device. At this time, push the locking block 37 to release the lock on the switching rod 35, slide the switching rod 35 to make the switching groove 36 connect the docking hole 33 where the puncture needle is located and the connection hole 34 on the aspiration side. Then push the locking block 37 to lock the switching rod 35 again, so that the aspiration path remains stable and connected. S2. Then, pull the push-pull plate 21 to move the push-pull rod 22 and piston plate 27 to the outside of the cylinder 11. At this time, negative pressure is formed at the puncture needle and the aspiration path, and the pericardial effusion is drawn into the sealed cavity formed by the piston plate 27 and the cylinder 11. S3. Then push the drive rod 23 to reset, pull the sealing plate 26 to close and release the seal, and push the push-pull plate 21 again to drive the piston plate 27 to move inward, pushing the pericardial effusion inside the sealing cavity through the discharge tube 13 to the external collection container. S4. When it is necessary to inject drugs into the patient's pericardial cavity, push the locking block 37 to unlock it, slide the switching rod 35 to change the position of the switching slot 36 so that the docking hole 33 is connected to the drug injection side connection hole 34, push the locking block 37 to lock the switching rod 35 again, and at this time the drug container pre-connected to the end of the drug injection side connection hole 34 can be directly injected into the pericardial cavity through the puncture needle.

[0054] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cardiovascular clinical puncture device, comprising a stent (1) and a cylinder (11) communicating with a puncture needle, characterized in that, The inner wall of the cylinder (11) is fitted with a partition plate (12) and a discharge pipe (13) connected to the outer surface of the cylinder (11). The control component (2), which is slidably disposed on the inner wall of the cylinder (11), includes a sealing plate (26), a slider (261), a piston plate (27) and a guide rail (271). The slider (261) is symmetrically arranged on both sides of the sealing plate (26) and is fitted and slidably connected to the inner wall of the guide rail (271). The guide rail (271) is opened on the inner wall of the piston plate (27). When the sealing plate (26) is subjected to force and moves along the inner wall of the guide rail (271), the two sides of the piston plate (27) open or close, changing the volume of the sealing cavity on both sides of the piston plate 27, so as to extract the liquid inside the cavity at a uniform speed and continuously. The switching assembly (3), which is assembled at the lower end of the cylinder (11), includes a round tube (32), a docking hole (33), a connecting hole (34) and a switching rod (35). The docking hole (33) is connected to the outer surface of the circular tube (32), and the connecting hole (34) is symmetrically arranged on one side of the outer surface of the circular tube (32). The switching rod (35) is slidably disposed on the inner wall of the ring (32). The connection state of the docking hole (33) and the connecting hole (34) is switched synchronously by the movement of the switching rod (35) for rapid switching between liquid extraction and drug injection operations.

2. The cardiovascular clinical puncture device according to claim 1, characterized in that, The control component (2) further includes a push-pull rod (22) that is slidably connected to the inner wall of the partition plate (12). The end of the push-pull rod (22) is fitted with a push-pull plate (21), and the inner cavity of the push-pull rod (22) is slidably fitted with a drive rod (23).

3. The cardiovascular clinical puncture device according to claim 2, characterized in that, Multiple sets of movable grooves (221) are evenly provided on the outer surface of the push-pull rod (22); The end of the drive rod (23) is fitted with a movable block (24), and the outer surface of the movable block (24) is fixedly provided with a movable rod (241) corresponding to the movable groove (221). The outer surface of the movable rod (241) is fitted and slidably connected to the inner wall of the movable groove (221).

4. The cardiovascular clinical puncture device according to claim 3, characterized in that, The end of the movable rod (241) is rotatably provided with a limiting rod (25), and the end of the limiting rod (25) is rotatably connected to the end of the sealing plate (26).

5. A cardiovascular clinical puncture device according to claim 4, characterized in that, The piston plate (27) is provided with a pressure plate (28) at its lower end, and the end of the pressure plate (28) is in contact with the end of the sealing plate (26).

6. A cardiovascular clinical puncture device according to claim 5, characterized in that, The cross-section of the guide rail (271) is L-shaped.

7. A cardiovascular clinical puncture device according to claim 1, characterized in that, The switching component (3) further includes a snap-fit ​​block (31) that snaps into the bracket (1), and the end of the snap-fit ​​block (31) is connected to the end of the round tube (32).

8. A cardiovascular clinical puncture device according to claim 7, characterized in that, The outer surface of the switching rod (35) is provided with a switching groove (36).

9. A cardiovascular clinical puncture device according to claim 8, characterized in that, The end of the snap-fit ​​block (31) is provided with a snap-fit ​​groove (311), and a locking block (37) is slidably provided on the inner wall of the snap-fit ​​groove (311). The end of the locking block (37) is snapped with the outer surface of the switching rod (35).

10. A method for clinical puncture in cardiovascular medicine, characterized in that, Using the puncture device as described in any one of claims 1-9, the puncture method includes the following steps: S1. First, insert the puncture needle into the patient's pericardial cavity according to the positioning, and keep the puncture needle connected to the round tube (32) of the device. At this time, push the locking block (37) to release the lock on the switching rod (35), slide the switching rod (35) to make the switching groove (36) connect the docking hole (33) where the puncture needle is located with the connection hole (34) on the aspiration side, and then push the locking block (37) to lock the switching rod (35) again to keep the aspiration path stable and connected. S2. Then pull the push-pull plate (21) to drive the push-pull rod (22) and the piston plate (27) to move outward of the cylinder (11). At this time, negative pressure is formed at the puncture needle and the aspiration path, and the pericardial effusion is drawn into the sealed cavity formed by the piston plate (27) and the cylinder (11). S3. Then push the drive rod (23) to reset, pull the sealing plate (26) to close and release the seal, and push the push-pull plate (21) again to drive the piston plate (27) to move inward, pushing the pericardial effusion inside the sealing cavity through the discharge tube (13) to the external collection container. S4. When it is necessary to inject drugs into the patient's pericardial cavity, push the locking block (37) to unlock it, slide the switching rod (35) to change the position of the switching slot (36) so that the docking hole (33) is connected to the drug injection side connection hole (34), push the locking block (37) to lock the switching rod (35) again, and at this time the drug container pre-connected to the end of the drug injection side connection hole (34) can be injected directly into the pericardial cavity through the puncture needle.

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