Clinical puncture device for cardiovascular medicine department

Abstract

The invention belongs to the technical field of medical instruments, and discloses a cardiovascular medicine clinical puncture device which comprises a needle cylinder and a puncture set connected with the bottom end of the needle cylinder, a first compression spring and a damping rod are arranged on the two sides of the needle cylinder respectively, the damping rod is sleeved with the first compression spring, and the top end of the first compression spring is connected with the telescopic end of the damping rod; the telescopic end of the damping rod is connected with a push plate at the top of a piston rod; the needle cylinder is provided with a positioning assembly, the positioning assembly comprises a mounting part and a pressing rod, one end of the pressing rod is connected with the pressing plate, the other end of the pressing rod is connected with a reset spring, and a first slope block between the two pressing rods is clamped in a positioning groove in the piston rod. A first compression spring is matched with a damping rod to slowly push a piston rod to move at a constant speed for suction, the burden of doctors is relieved, and stability is improved; after a certain amount of effusion is sucked, the piston rod is automatically locked by the positioning assembly, suction is paused, observation of a doctor is facilitated, and the safe operation standard is better met.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a cardiovascular clinical puncture device. Background Technology

[0002] In the emergency and critical care of cardiovascular patients, pericardiocentesis is a crucial procedure for relieving cardiac tamponade and saving lives, as well as a key method for diagnosing unexplained pericardial effusion. Therefore, a puncture device is required. Current puncture devices typically consist of a syringe, catheter, and needle, and are performed precisely under ultrasound guidance. During effusion aspiration, to ensure maximum safety and prevent serious complications such as cardiac re-expansion pulmonary edema and acute right ventricular failure, aspiration must adhere to the core principles of "slow, fractionated, and limited volume." Specifically, the physician holds a 50ml syringe and slowly pulls the plunger to aspirate. Once a certain volume (generally 20-30ml) has been aspirated, aspiration is paused to observe the patient's blood pressure, heart rate, and subjective feelings. Aspiration can only continue after no adverse reactions are observed. Currently, clinical aspiration relies entirely on doctors manually operating syringes, with a total aspiration volume of 300-500ml. This requires prolonged, repeated aspiration sessions, often lasting tens of minutes, placing a heavy burden on medical staff and making it difficult to ensure aspiration stability. Furthermore, this procedure is overly dependent on the doctor's personal experience and feel, lacking precise quantification and rhythm control. Simultaneously, doctors need to monitor equipment, ultrasound images, and the patient's condition, requiring them to perform multiple tasks simultaneously, increasing operational risks and workload. While existing technologies include various infusion pumps and drainage pumps, they typically provide continuous, constant-rate infusion or high-flow-rate continuous drainage, which does not meet the safety standards for pericardial puncture aspiration. Moreover, these are non-disposable consumables, requiring subsequent cleaning and disinfection, making them unsuitable for clinical use. Therefore, manual aspiration remains the primary method. There is an urgent need for a simple, easy-to-use puncture device that reduces the doctor's workload and better meets safety standards to meet clinical needs. Summary of the Invention

[0003] The present invention aims to provide a cardiovascular clinical puncture device to solve the problems of the current puncture devices being too burdensome to use and unable to be operated in a standardized manner.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A cardiovascular clinical puncture device includes a syringe and a puncture assembly connected to the bottom of the syringe. A compression spring and a damping rod are respectively arranged on both sides of the syringe. The compression spring is sleeved on the damping rod, and its top end is connected to the telescopic end of the damping rod. The top end of the telescopic end of the damping rod is connected to the bottom surface of a push plate at the top of the piston rod, used to push the piston rod to move at a uniform or near-uniform speed. The piston rod is slidably disposed within the syringe to drive the piston movement. A positioning assembly is provided on the syringe, comprising two sets of mounting parts disposed opposite each other on the top of the syringe and a pressing rod slidably disposed within the mounting parts. One end of the pressing rod extends out of the mounting part and is connected to a pressing plate, and the other end is connected to a return spring. A inclined block is provided between the two sets of pressing rods, and the inclined block is engaged in a positioning groove. Several positioning grooves are formed on the piston rod. An adjustment assembly is provided on the mounting parts to adjust the piston rod movement speed.

[0005] Furthermore, the puncture assembly includes an aspiration catheter and a drainage catheter. One end of the aspiration catheter is connected to the puncture needle for puncture, and the other end is connected to the bottom of the syringe via an inlet check valve. One end of the drainage catheter is connected to the bottom of the syringe via a drainage check valve.

[0006] Furthermore, the adjustment assembly includes a fixed cylinder mounted on the mounting section and a movable cylinder slidably mounted inside the fixed cylinder. A screw is rotatably mounted inside the fixed cylinder, and the end of the screw passes through one end of the movable cylinder, with the two being threaded together. A top block is mounted at the other end of the movable cylinder, and the top block contacts the surface of the slide groove, which is formed on the piston rod.

[0007] Furthermore, a safety component is installed inside the screw. The safety component includes a push rod and a moving rod that slide through the screw. One end of the push rod is a sharp end, and it passes through the moving cylinder and is located in the through hole of the top block. A second compression spring is sleeved on the push rod to push the push rod to move. A locking component is installed inside the screw to lock the push rod. The moving rod is located on one side of the locking component and is used to drive the locking component to move.

[0008] Furthermore, the locking assembly includes a second inclined block slidably disposed within the screw and a positioning spring for pushing the second inclined block to move. The end of the second inclined block is engaged in a limiting groove, which is opened on the top rod. An inclined groove is opened on the second inclined block, and the inclined surface of the inclined groove contacts the edge of the end of the moving rod.

[0009] Furthermore, the end edge of the moving rod is provided with a rounded transition, and one end of the moving rod that protrudes from the screw is connected to the disc.

[0010] Furthermore, a vertical plate is provided on the top rod, with the top of the vertical plate located in the through groove, which is opened on the movable rod.

[0011] The principles and beneficial effects of the technical solution are as follows: The present invention provides a cardiovascular clinical puncture device, which uses a compression spring to provide elastic force, and in conjunction with a damping rod to slowly and uniformly push the piston rod to move for aspiration, replacing manual operation, reducing the burden on doctors, and improving stability; The piston rod is positioned by a positioning component, so that the piston rod is pushed to a certain position. After a certain amount of fluid is aspirated, it is automatically locked by the positioning component and the aspiration is stopped. This provides a window period for doctors to observe the patient's condition, which is more in line with the safe operation standards of quantitative aspiration, pausing and evaluation. Moreover, doctors do not need to observe the aspirated fluid volume in real time, which reduces their burden. The piston rod's movement speed can be adjusted by adjusting the components, thereby regulating the suction speed to meet the suction needs of liquids with different viscosities and ensuring the stability of the suction speed. By incorporating safety components, the piston rod can be quickly locked, enabling a one-button emergency stop and effectively improving the device's safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a cardiovascular clinical puncture device according to the present invention; Figure 2 This is a schematic diagram of the assembly structure of a cardiovascular clinical puncture device according to the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 This is a cross-sectional view of a positioning component in a cardiovascular clinical puncture device according to the present invention. Figure 6 This is a cross-sectional view of the adjustment component and safety component in a cardiovascular clinical puncture device according to the present invention. Figure 7 for Figure 6 Enlarged view of point C in the middle; Figure 8 This is a partial cross-sectional view of the piston rod in a cardiovascular clinical puncture device according to the present invention; Figure 9 This is a schematic diagram of the top of the syringe in a cardiovascular clinical puncture device of the present invention; The corresponding labels in the attached diagram are named as follows: 1. Syringe; 101. Compression spring No. 1; 102. Damping rod; 2. Piston rod; 201. Slide groove; 202. Positioning groove; 3. Aspiration conduit; 301. Puncture needle; 302. Inlet check valve; 4. Drainage conduit; 401. Drainage check valve; 5. Mounting part; 501. Pressing rod; 502. Return spring; 503. Inclined block No. 1; 504. Pressing plate; 6. Fixed cylinder; 601. Screw; 602. Moving cylinder; 603. Top block; 7. Top rod; 701. Compression spring No. 2; 702. Inclined block No. 2; 703. Positioning spring; 704. Inclined groove; 705. Vertical plate; 706. Through groove; 707. Moving rod; 708. Disc; 709. Limiting groove. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figures 1-9As shown, a cardiovascular clinical puncture device includes a syringe 1 and a puncture assembly connected to the bottom of the syringe 1. The puncture assembly is used for puncture and drainage. The syringe 1 can be a 50ml syringe from the prior art. A compression spring 101 and a damping rod 102 are respectively arranged on both sides of the syringe 1. The damping rod 102 is a hydraulic damper from the prior art, which is filled with silicone oil or special damping grease. The speed is adjusted by the viscous resistance generated when the piston inside moves in the oil, thereby slowing down the compression of the compression spring 101. The provided elastic force causes the first compression spring 101 to push the telescopic end of the damping rod 102 to move, causing the telescopic end to slowly and uniformly push the piston rod 2 to move for suction. The first compression spring 101 is sleeved on the damping rod 102, and its top end is connected to the telescopic end of the damping rod 102. The top end of the telescopic end of the damping rod 102 is connected to the bottom surface of the push plate at the top of the piston rod 2, which is used to push the piston rod 2 to move at a uniform or near-uniform speed. The piston rod 2 is slidably disposed in the syringe 1 to drive the piston to move. The syringe 1 is provided with The positioning assembly includes two sets of mounting portions 5 positioned opposite each other on the top of the syringe 1, and a pressing rod 501 slidably disposed within the mounting portions 5. One end of the pressing rod 501 extends out of the mounting portion 5 and connects to the pressing plate 504, while the other end connects to the return spring 502. A first inclined block 503 is disposed between the two sets of pressing rods 501. The first inclined block 503 is engaged in the positioning groove 202. Several positioning grooves 202 are formed on the piston rod 2. Under the action of the return spring 502, the first inclined block 503 initially... Finally, the first inclined block 503 contacts the surface of the piston rod 2. The end face of the first inclined block 503 is flat, while the surface of the piston rod 2 is curved. The contact area between the two is small, so the first inclined block 503 will not affect the movement of the piston rod 2. When the positioning groove 202 on the piston rod 2 is aligned with the first inclined block 503, the first inclined block 503 is engaged. Furthermore, the positioning groove 202 is unidirectionally inclined, so that the first inclined block 503 can only lock the piston rod 2 in one direction. An adjustment component is provided on the mounting part 5 to adjust the moving speed of the piston rod 2.

[0014] This device is a disposable consumable. When using it, remove the device from the sterile packaging bag and, under ultrasound guidance, perform puncture via the puncture group. Once at the puncture site, the doctor only needs to hold the syringe 1 with one hand, press the pressing plate 504, and push the pressing rod 501 to move, thereby causing the first inclined block 503 to separate from the positioning groove 202 on the piston rod 2. Releasing the pressing plate 504 releases the lock on the piston rod 2, allowing the first compression spring 101 to return to its original position, pushing the telescopic end on the damping rod 102 to extend slowly and uniformly, thus moving the piston rod 2 and allowing the contents of the syringe 1 to... The piston moves, generating negative pressure, replacing the manual action of pulling the piston rod 2. The fluid is then automatically and uniformly aspirated into the syringe 1 via the puncture group, reducing the doctor's workload. The doctor only needs to focus on the patient's condition and the ultrasound image, without needing to expend extra effort on aspiration. When the doctor releases the pressing plate 504, the return spring 502 causes the pressing rod 501 to pull the inclined block 503 into contact with the surface of the piston rod 2. When the piston rod 2 moves a certain distance and the aspirated volume reaches 20-30ml, the positioning groove 2 in the middle of the piston rod 2... Align 02 with the first inclined plate 503, causing the first inclined plate 503 to snap into place with a click, and locking the piston rod 2 again, automatically pausing fluid aspiration. This allows the doctor to technically observe and inquire about the patient's condition and understand the nature of the effusion, providing the doctor with an assessment window. Furthermore, it eliminates the need for the doctor to constantly monitor the aspirated volume, achieving quantitative automatic pausing. After assessment, pressing the pressure plate 504 again resumes aspiration, better meeting safety standards and simplifying operation, resulting in higher acceptance by doctors. Once syringe 1 has aspirated the rated volume of effusion, the doctor only... The piston rod 2 needs to be pushed downwards to allow the accumulated fluid to drain from the syringe 1 through another tube of the puncture group. At the same time, the piston rod 2 moves downwards, retracting the telescopic end of the damping rod 102 and compressing the first compression spring 101. When the piston rod 2 moves to the bottom, the first inclined block 503 aligns with the positioning groove 202 at the top of the piston rod 2, automatically locking it and returning the device to its initial state for further fluid aspiration. This allows the device to continuously aspirate fluid, avoiding unstable aspiration caused by manual operation, muscle fatigue, and other factors, and making the device more standardized.

[0015] In this embodiment, the puncture assembly includes an aspiration catheter 3 and a drainage catheter 4. One end of the aspiration catheter 3 is connected to the puncture needle 301 for puncture, and the other end is connected to the bottom of the syringe 1 via an inlet check valve 302. One end of the drainage catheter 4 is connected to the bottom of the syringe 1 via a drainage check valve 401, and the other end of the drainage catheter 4 can be connected to a storage container such as a drainage bag or a collection bottle. Puncture is performed using the puncture needle 301, and the aspiration catheter 3 aspirates fluid. When the piston rod 2 moves the piston upwards for aspiration, the inlet check valve 302 opens under negative pressure, and the drainage check valve 401 closes, allowing the accumulated fluid to enter the syringe 1 through the aspiration catheter 3. When the piston rod 2 moves the piston downwards for drainage, the inlet check valve 302 closes under positive pressure, and the drainage check valve 401 opens, allowing the accumulated fluid in the syringe 1 to drain from the drainage catheter 4, thus enabling continuous aspiration without repeatedly removing the syringe 1 for drainage.

[0016] In this embodiment, the adjustment assembly includes a fixed cylinder 6 mounted on the mounting part 5 and a movable cylinder 602 slidably mounted inside the fixed cylinder 6. A screw 601 is rotatably mounted inside the fixed cylinder 6, with its end passing through one end of the movable cylinder 602, and the two are threaded together. A top block 603 is mounted on the other end of the movable cylinder 602, and the top block 603 contacts the surface of the slide groove 201, which is formed on the piston rod 2. By rotating the screw 601, the movable cylinder 602 can be extended out of the fixed cylinder 6, adjusting the friction between the top block 603 and the slide groove 201, thereby adjusting the resistance encountered by the piston rod 2 when it moves. This allows the doctor to adjust the moving speed of the piston rod 2 according to the actual situation. Initially, the moving speed of the piston rod 2 is relatively fast (the speed here is relative to the same force for aspirating liquids of different viscosities), which is suitable for aspirating viscous fluids. The resistance fed back to the piston rod 2 by the viscous fluid makes... The actual moving speed of piston rod 2 is relatively slow. When the effusion is thin, the required suction force is small, and the resistance fed back to piston rod 2 is small, resulting in a faster actual moving speed of piston rod 2. The doctor only needs to adjust the friction of the top block 603 to change the actual moving speed of piston rod 2, so as to achieve slow and uniform suction of effusion. By adjusting the components, the device can avoid insufficient suction force and uncontrollable suction speed for effusions of different viscosities. This allows the device to be adjusted according to the actual situation, making it more adaptable.

[0017] In this embodiment, a safety component is installed inside the screw 601. The safety component includes a push rod 7 and a moving rod 707 that slide through the screw 601. One end of the push rod 7 is a sharp end, and it passes through the moving cylinder 602 and is located in the through hole of the top block 603. A second compression spring 701 is fitted on the push rod 7 to push the push rod 7 to move. A locking component is provided inside the screw 601 to lock the push rod 7. The moving rod 707 is located on one side of the locking component and is used to drive the locking component to move. When it is necessary to stop the aspiration urgently, the doctor only needs to press the moving rod 707 to release the locking component from the push rod 7. Under the action of the second compression spring 701, the push rod 7 quickly extends out of the top block 603, and its sharp end pierces the piston rod 2, thereby quickly locking the piston rod 2, realizing an emergency stop and improving the safety of the operation. At the same time, the doctor can complete the pressing operation immediately, making the operation simple.

[0018] In this embodiment, the locking assembly includes a second inclined block 702 slidably disposed within the screw 601 and a positioning spring 703 that pushes the second inclined block 702 to move. The end of the second inclined block 702 is engaged in a limiting groove 709, which is formed on the top rod 7. The second inclined block 702 has an inclined groove 704, the inclined surface of which contacts the end edge of the moving rod 707. When the moving rod 707 is pushed, its end edge presses against the inclined surface of the inclined groove 704 on the second inclined block 702, causing the second inclined block 702 to move and separate from the limiting groove 709 on the top rod 7, thereby releasing the lock on the top rod 7. If it is necessary to reset the top rod 7, simply pull back the moving rod 707 and the top rod 7. Under the action of the positioning spring 703, the second inclined block 702 remains in contact with the surface of the top rod 7 and does not affect the movement of the top rod 7 until it aligns with the limiting groove 709, thus locking the top rod 7.

[0019] In this embodiment, the end edge of the movable rod 707 is provided with a rounded transition, and one end of the movable rod 707 that protrudes from the screw 601 is connected to the disc 708. The rounded transition allows the end edge of the movable rod 707 to better press against the inclined surface of the inclined groove 704, making it more labor-saving; the disc 708 allows the doctor to easily push the movable rod 707 to move, improving the convenience of operation.

[0020] In this embodiment, a vertical plate 705 is provided on the push rod 7, and the top of the vertical plate 705 is located in the through groove 706, which is formed on the moving rod 707. When the push rod 7 extends, the vertical plate 705 moves in the through groove 706. When the push rod 7 needs to be reset, the moving rod 707 is pulled, which moves the vertical plate 705 through the through groove 706, thereby driving the push rod 7 to move back into the adjusting assembly and releasing the emergency lock on the piston rod 2.

[0021] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A cardiovascular clinical puncture device, characterized in that: The device includes a syringe (1) and a puncture assembly connected to the bottom of the syringe (1). A compression spring (101) and a damping rod (102) are respectively installed on both sides of the syringe (1). The compression spring (101) is sleeved on the damping rod (102), and its top end is connected to the telescopic end of the damping rod (102). The top end of the telescopic end of the damping rod (102) is connected to the bottom surface of the push plate at the top of the piston rod (2), used to push the piston rod (2) to move at a constant or near-constant speed. The piston rod (2) is slidably disposed inside the syringe (1) to drive the piston to move. A positioning assembly is provided on the syringe (1). The component includes two sets of mounting parts (5) disposed opposite to each other on the top of the syringe (1) and a pressing rod (501) slidably disposed in the mounting part (5). One end of the pressing rod (501) extends out of the mounting part (5) and is connected to the pressing plate (504), and the other end is connected to the reset spring (502). A first inclined block (503) is disposed between the two sets of pressing rods (501). The first inclined block (503) is locked in the positioning groove (202). A plurality of positioning grooves (202) are opened on the piston rod (2). An adjustment component is provided on the mounting part (5) for adjusting the moving speed of the piston rod (2).

2. The cardiovascular clinical puncture device according to claim 1, characterized in that: The puncture assembly includes a suction catheter (3) and a drain catheter (4). One end of the suction catheter (3) is connected to the puncture needle (301) for puncture, and the other end is connected to the bottom of the syringe (1) through a one-way valve (302). One end of the drain catheter (4) is connected to the bottom of the syringe (1) through a one-way valve (401).

3. The cardiovascular clinical puncture device according to claim 1, characterized in that: The adjustment assembly includes a fixed cylinder (6) disposed on the mounting part (5) and a movable cylinder (602) slidably disposed in the fixed cylinder (6). A screw (601) is rotatably disposed in the fixed cylinder (6). The end of the screw (601) passes through one end of the movable cylinder (602) and the two are threaded together. A top block (603) is disposed at the other end of the movable cylinder (602). The top block (603) contacts the surface of the slide groove (201). The slide groove (201) is formed on the piston rod (2).

4. A cardiovascular clinical puncture device according to claim 3, characterized in that: A safety component is installed inside the screw (601). The safety component includes a push rod (7) and a moving rod (707) that slide through the screw (601). One end of the push rod (7) is a sharp end and it passes through the moving cylinder (602) and is located in the through hole of the top block (603). A second compression spring (701) is sleeved on the push rod (7) to push the push rod (7) to move. A locking component is installed inside the screw (601) to lock the push rod (7). The moving rod (707) is located on one side of the locking component and is used to drive the locking component to move.

5. A cardiovascular clinical puncture device according to claim 4, characterized in that: The locking assembly includes a second inclined block (702) slidably disposed in the screw (601) and a positioning spring (703) for pushing the second inclined block (702) to move. The end of the second inclined block (702) is engaged in a limiting groove (709), which is opened on the top rod (7). An inclined groove (704) is opened on the second inclined block (702), and the inclined surface of the inclined groove (704) contacts the edge of the end of the moving rod (707).

6. A cardiovascular clinical puncture device according to claim 5, characterized in that: The end edge of the movable rod (707) is provided with a rounded transition, and one end of the movable rod (707) that extends out of the screw (601) is connected to the disc (708).

7. A cardiovascular clinical puncture device according to claim 5, characterized in that: A vertical plate (705) is provided on the top rod (7), the top of the vertical plate (705) is located in the through groove (706), and the through groove (706) is opened on the moving rod (707).

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