A clinical puncture device for cardiovascular medicine

Abstract

The present invention discloses a clinical puncture device for cardiovascular medicine, which relates to the field of medical devices and includes a flexible tube and a puncture needle installed at one end of the flexible tube. It further includes: a cylinder body, inside which a first piston and a second piston are slidably arranged along its axial direction. A first operating rod is installed on the upper surface of the first piston, and the top end of the first operating rod penetrates through the cylinder body and extends to the outside of the cylinder body. A second operating rod is installed on the upper surface of the second piston, and the top end of the second operating rod sequentially penetrates through the first piston and the first operating rod and extends to the outside of the cylinder body. By the synchronous up-and-down movement of the first piston and the second piston relative to the cylinder body, the present invention can efficiently aspirate pericardial effusion. This synchronous movement mode enables the upper cavity and the lower cavity to alternately generate pressure and negative pressure, realizing the rapid aspiration and discharge of pericardial effusion, and is applicable to various situations such as rapid decompression required for acute cardiac tamponade, a large amount of exudative effusion, non-bloody effusion clearance, lavage, and irrigation, greatly improving the aspiration efficiency.

Description

Technical Field

[0001] The present invention relates to the technology of medical devices, and particularly to a clinical puncture device for cardiovascular medicine. Background Art

[0002] In the clinical diagnosis and treatment process of cardiovascular medicine, pericardiocentesis is an invasive medical procedure mainly used for diagnosing and treating diseases such as pericardial effusion. The pericardium is a thin membrane surrounding the heart, which plays a role in protection and support. In some cases, such as pericardial effusion, pericarditis or cardiac tamponade, excessive fluid may accumulate in the pericardium, resulting in limited heart function. Pericardiocentesis is performed by inserting a needle into the pericardial cavity to drain the fluid, so as to relieve the pressure on the heart. At present, many drawbacks have emerged in the actual application of the commonly used clinical puncture devices in cardiovascular medicine. During the puncture operation, traditionally, a syringe is used to extract fluid or gas. However, each time a fluid is extracted, the syringe needs to be removed and then discharged, which is a relatively cumbersome operation and cannot perform continuous drainage. Moreover, the design of some existing puncture devices is not reasonable enough. The efficiency of some devices in aspirating fluid is not high, and it is difficult to quickly and effectively remove pericardial effusion. Especially in the face of critical situations such as acute cardiac tamponade that require urgent and rapid decompression, the existing aspiration devices often cannot meet the urgent clinical needs and may lead to delays in the treatment time.

[0003] For example, in the Chinese invention patent with the authorization announcement number of CN118766556B, a clinical puncture device for cardiovascular medicine is disclosed. The clinical puncture device for cardiovascular medicine includes a syringe barrel, which has a barrel body and a piston arranged inside the syringe barrel. The top of the piston penetrates through the syringe barrel and is fixedly connected with a pressing plate. The bottom of the syringe barrel is communicated with a puncture needle through a first control valve, and the syringe barrel is arranged inside a fixed sleeve; a liquid extraction tube, which has a tube body and a liquid storage cylinder arranged at one end of the liquid extraction tube. The liquid storage cylinder is arranged at the bottom of a fixed plate, and the end of the liquid extraction tube away from the liquid storage cylinder is communicated with the syringe barrel through a second control valve; a medicine storage tank, which has a tank body and a heating device arranged inside the medicine storage tank. The inside of the medicine storage tank is communicated with a medicine outlet tube, and the end of the medicine outlet tube away from the medicine storage tank is communicated with the syringe barrel through a third control valve. When it is necessary to inject medicine into a patient, the fluid in the syringe barrel is completely discharged, the first control valve and the second control valve are closed, and the third control valve is opened to make the medicine storage tank communicate with the syringe barrel. At this time, the pressing plate is pulled to draw the medicine inside the medicine storage tank into the syringe barrel, and then the third control valve is closed and the first control valve is opened to inject the medicine inside the syringe barrel into the patient. The fluid extraction and the injection of therapeutic agents can be combined into one, making the operations of extracting fluid and administering medicine more convenient, and at the same time reducing the pain of the patient from repeated needle punctures. However, during the actual use process, this puncture device needs to frequently control the opening and closing of three valves, and the operation is cumbersome, resulting in a situation where misoperations are likely to occur.

[0004] In a Chinese invention patent with the authorization announcement number CN118680643B, a pericardial and thoracic cavity puncture and effusion drainage device is disclosed. This pericardial and thoracic cavity puncture and effusion drainage device includes a puncture mechanism and an effusion drainage mechanism. The effusion drainage mechanism includes: a plugging disc, through which a liquid inlet pipe and a liquid outlet pipe are provided. The liquid inlet pipe is fluid-coupled to the puncture mechanism via a hose, and the liquid outlet pipe is used to be coupled to an external effusion storage container; a cylinder body, rotatably coupled to the plugging disc and provided with a first cavity and a second cavity; wherein the device is adapted to alternately extract and discharge effusion from the first cavity and the second cavity by the relative rotation of the plugging disc and the cylinder body using the liquid inlet pipe and the liquid outlet pipe, so as to achieve uninterrupted extraction; it realizes the alternating connection of the first cavity and the second cavity with the liquid inlet pipe and the liquid outlet pipe by rotating the cylinder body to achieve continuous extraction. The connection and sealing of its pipelines completely depend on the pressing degree between the plugging disc and the cylinder body, and it is easy for the cylinder body to be difficult to rotate due to excessive friction during operation, and liquid leakage is likely to occur during continuous use. Summary of the Invention

[0005] The object of the present invention is to provide a clinical puncture device for cardiovascular medicine to solve the problems of cumbersome operation, low suction efficiency, and difficulty in adapting to different treatment situations existing in the existing pericardial puncture device.

[0006] To achieve the above object, the present invention provides the following technical solution: A clinical puncture device for cardiovascular medicine includes a hose and a puncture needle installed at one end of the hose, and further includes:

[0007] A cylinder body, inside which a first piston and a second piston are slidably arranged along its axis. A first operating rod is installed on the upper surface of the first piston, and the top end of the first operating rod penetrates through the cylinder body and extends to the outside of the cylinder body. A second operating rod is installed on the upper surface of the second piston, and the top end of the second operating rod sequentially penetrates through the first piston and the first operating rod and extends to the outside of the cylinder body;

[0008] Two sets of liquid inlet assemblies provided at the top end and the bottom end of the cylinder body, each set of liquid inlet assemblies including:

[0009] Two communicating pipes communicating with the cylinder body, and a liquid inlet and an elastically resetable one-way plugging assembly are arranged in the communicating pipes;

[0010] When the first piston moves to the extreme position at the top end of the cylinder body, the first piston blocks the communication between the top liquid inlet assembly and the cylinder body;

[0011] When the second piston moves to the extreme position at the bottom end of the cylinder body, the second piston blocks the communication between the bottom liquid inlet assembly and the cylinder body;

[0012] The first main pipeline is arranged on one side of the cylinder body. The inside of the first main pipeline is communicated with the communicating pipes at the top and bottom on the same side. The bottom end of the first main pipeline is communicated with the other end of the flexible hose.

[0013] The second main pipeline is arranged on the other side of the cylinder body. The inside of the second main pipeline is communicated with the communicating pipes at the top and bottom on the same side.

[0014] A rubber head for sealing the puncture of the needle for externally injecting the liquid medicine is arranged on the side wall of the first main pipeline.

[0015] Further, the bottom end of the first operating rod is fixedly connected to the first piston, and the bottom end of the second operating rod is fixedly connected to the second piston. A sliding channel for the second operating rod to pass through is arranged inside both the first operating rod and the first piston. A clearance fit is formed between the inner wall of the sliding channel and the outer surface of the second operating rod.

[0016] Further, the bottom end of the first operating rod is fixedly connected to the first piston. The outer side wall of the first operating rod is slidably connected to the cylinder body. A through hole is axially formed in the first operating rod, and an internal thread is arranged on the inner wall of the through hole. An external thread matching the internal thread is arranged on the outer surface of the second operating rod. The bottom end of the second operating rod is rotatably connected to the second piston.

[0017] Further, the one-way blocking assembly includes an elastic member and a blocking member capable of blocking the liquid inlet. One end of the elastic member is fixedly connected to the inner wall of the communicating pipe, and the other end of the elastic member abuts against the blocking member.

[0018] Further, one end of the blocking member close to the liquid inlet is arranged in a conical shape, and the opening edge of the liquid inlet is an annular inclined surface matching the conical surface of the blocking member.

[0019] Further, the blocking member is a sphere, and the opening edge of the liquid inlet is arranged in a circular arc groove.

[0020] Further, the two communicating pipes of each liquid inlet assembly are coaxially arranged.

[0021] Further, a drain pipe is communicated with the top end of the second main pipeline.

[0022] Further, sealing rings are fixedly sleeved on the exteriors of both the first piston and the second piston.

[0023] Further, receiving grooves are formed on the sides of the first piston and the second piston away from each other.

[0024] Compared with the prior art, a clinical puncture device for cardiovascular medicine provided by the present invention can efficiently aspirate pericardial effusion by the synchronous up and down movement of the first piston and the second piston relative to the cylinder body. This synchronous movement mode enables the upper cavity and the lower cavity to alternately generate pressure and negative pressure, realizing the rapid aspiration and discharge of pericardial effusion, and is applicable to various situations such as rapid decompression required for acute cardiac tamponade, a large amount of exudative effusion, clearance of non-bloody effusion, lavage, and irrigation, greatly improving the aspiration efficiency;

[0025] By setting the first piston and the second piston, various operation modes can be realized. When the first piston moves up and down relative to the cylinder body and the second piston remains stationary relative to the cylinder body, the effusion discharge efficiency is much lower than that during synchronous movement, and it is applicable to the situation where the amount of fluid withdrawn should not be too much during the first fluid aspiration; when the first piston remains stationary relative to the cylinder body and the second piston moves up and down relative to the cylinder body, the amount of fluid withdrawn can also be controlled, and it is applicable to situations such as the first fluid aspiration, loculated effusion, and diagnostic puncture;

[0026] By controlling the distance between the first piston and the second piston, the amount aspirated each time they move synchronously to the extreme position is changed, and it can effectively adapt to different treatment situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0028] Figure 1 It is a schematic external three-dimensional structure diagram provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic first overall sectional structure diagram provided by an embodiment of the present invention;

[0030] Figure 3 It is provided by an embodiment of the present invention Figure 2 The enlarged schematic diagram at A in

[0031] Figure 4 It is provided by an embodiment of the present invention Figure 2 The enlarged schematic diagram at B in

[0032] Figure 5 It is a schematic exploded structure diagram of the one-way sealing assembly and the connecting pipe provided by an embodiment of the present invention;

[0033] Figure 6 It is a schematic second overall sectional structure diagram provided by an embodiment of the present invention;

[0034] Figure 7Explosion structure schematic diagram of the cylinder body, top cover and bottom cover provided by the embodiment of the present invention;

[0035] Figure 8 Combination schematic diagram of a first piston, a second piston, a first operating rod and a second operating rod provided by the embodiment of the present invention;

[0036] Figure 9 Another combination schematic diagram of a first piston, a second piston, a first operating rod and a second operating rod provided by the embodiment of the present invention.

[0037] Explanation of reference numerals:

[0038] 100, hose; 200, puncture needle; 300, cylinder; 301, cylinder body; 302, top cover; 303, bottom cover; 310, first piston; 320, second piston; 330, first operating rod; 340, second operating rod; 400, connecting pipe; 410, liquid inlet; 420, one-way blocking assembly; 421, elastic member; 422, blocking member; 500, first main pipe; 600, second main pipe; 700, rubber head; 800, drain pipe. Detailed implementation manners

[0039] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below with reference to the accompanying drawings.

[0040] Please refer to Figures 1 to 6 , a clinical puncture device for cardiovascular medicine, including a hose 100 and a puncture needle 200 installed at one end of the hose 100. The hose 100 is made of medical-grade silicone material, with an inner diameter of 3-5 mm, an outer diameter of 5-7 mm, and a length that can be customized according to actual needs. The puncture needle 200 is made of stainless steel, and the needle body diameter matches the inner diameter of the hose 100 to ensure good sealing performance and liquid flowability. The tip of the needle is designed in a diamond shape, with a sharp cutting edge, and can easily penetrate tissues such as the pericardium. It should be understood that the above is only an exemplary introduction of the hose 100 and the puncture needle 200, and any suitable hose 100 and puncture needle 200 in the art can be applied to the exemplary embodiments according to the present disclosure, and the present disclosure makes no limitation thereto. It also includes:

[0041] A cylinder body 300, inside which a first piston 310 and a second piston 320 are slidably arranged along its axial direction. Both the first piston 310 and the second piston 320 are made of medical rubber material, having good elasticity and sealing performance. The outer diameter of the pistons fits closely with the inner diameter of the cylinder body 300 to ensure that there is no liquid leakage during the movement; a first operating rod 330 is installed on the upper surface of the first piston 310. The top end of the first operating rod 330 penetrates through the cylinder body 300 and extends to the outside of the cylinder body 300, and its extended length is 5 - 10 cm, which is convenient for medical staff to hold; a second operating rod 340 is installed on the upper surface of the second piston 320. The top end of the second operating rod 340 sequentially penetrates through the first piston 310 and the first operating rod 330 and extends to the outside of the cylinder body 300. Both the first operating rod 330 and the second operating rod 340 are made of stainless steel material and the surfaces are anti-slip treated, which is convenient for medical staff to operate;

[0042] Two groups of liquid inlet components provided at the top end and the bottom end of the cylinder body 300, each group of liquid inlet components including:

[0043] Two connecting pipes 400 communicated with the cylinder body 300. The connecting pipes 400 are made of medical plastic material, such as polypropylene (PP). An inlet port 410 and a one-way sealing component 420 capable of elastic reset are arranged inside the connecting pipes 400;

[0044] When the first piston 310 moves to the extreme position at the top end of the cylinder body 300, the first piston 310 blocks the communication between the top liquid inlet component and the cylinder body 300;

[0045] When the second piston 320 moves to the extreme position at the bottom end of the cylinder body 300, the second piston 320 blocks the communication between the bottom liquid inlet component and the cylinder body 300;

[0046] A first main pipe 500 provided on one side of the cylinder body 300. The inside of the first main pipe 500 is communicated with the connecting pipes 400 at the top end and the bottom end on the same side. The bottom end of the first main pipe 500 is communicated with the other end of the hose 100;

[0047] A second main pipe 600 provided on the other side of the cylinder body 300. The inside of the second main pipe 600 is communicated with the connecting pipes 400 at the top end and the bottom end on the same side;

[0048] A rubber head 700 for the puncture seal of the needle for external perfusion of liquid medicine is provided on the side wall of the first main pipe 500. The rubber head 700 is made of medical silicone material, having good elasticity and sealing performance. The central thickness of the rubber head 700 is 2 - 3 mm, and it can tightly wrap the needle after the needle puncture to prevent the liquid medicine from leaking.

[0049] When performing pericardiocentesis to aspirate pericardial effusion, traditionally, a syringe is used to extract the effusion or gas. However, each time the effusion is aspirated, the syringe needs to be removed and then discharged, which makes the operation rather cumbersome and unable to perform continuous drainage. Moreover, the design of some existing puncture devices is not reasonable enough. The efficiency of some devices in aspirating effusion is not high, and it is difficult to quickly and effectively remove pericardial effusion. Especially in the face of critical situations such as acute cardiac tamponade that require urgent and rapid decompression, the existing aspiration devices often cannot meet the urgent clinical needs and may lead to delays in the treatment time;

[0050] Therefore, in this application, after the medical staff inserts the puncture needle 200 into the patient's pericardial cavity, the first piston 310 and the second piston 320 can be moved relative to the cylinder 300 through the first operating rod 330 and the second operating rod 340. The first piston 310 and the second piston 320 divide the interior of the cylinder 300 into an upper cavity and a lower cavity. The first piston 310 is controlled to move through the first operating rod 330, and the second piston 320 is controlled to move through the second operating rod 340. The movements of the first piston 310 and the second piston 320 are as follows:

[0051] When the first piston 310 and the second piston 320 move synchronously upward relative to the cylinder 300, the pressure inside the upper cavity increases. The liquid inlet assembly connected to the first main pipeline 500 and located at the top is closed (the one-way blocking assembly 420 in the connecting pipe 400 of this liquid inlet assembly blocks the liquid inlet 410), and the liquid inlet assembly connected to the second main pipeline 600 and located at the top is opened (the pressure in the upper cavity increases, and the one-way blocking assembly 420 in the connecting pipe 400 of this liquid inlet assembly does not block the liquid inlet 410). At this time, the gas-liquid in the upper cavity is pressed into the second main pipeline 600 and discharged;

[0052] When the negative pressure inside the lower cavity increases, the liquid inlet assembly connected to the first main pipeline 500 and located at the bottom is opened (the negative pressure inside the lower cavity increases, and the one-way blocking assembly 420 in the connecting pipe 400 of this liquid inlet assembly does not block the liquid inlet 410), and the liquid inlet assembly connected to the second main pipeline 600 and located at the bottom is closed (the one-way blocking assembly 420 in the connecting pipe 400 of this liquid inlet assembly blocks the liquid inlet 410). At this time, under the action of the negative pressure, the pericardial effusion enters the lower cavity of the cylinder 300 through the puncture needle 200, the hose 100 and the first main pipeline 500;

[0053] When the first piston 310 and the second piston 320 move synchronously downward relative to the cylinder 300, similarly, the negative pressure inside the upper cavity increases. The liquid inlet assembly connected to the first main pipeline 500 and located at the top is opened, and the liquid inlet assembly connected to the second main pipeline 600 and located at the top is closed. At this time, under the action of the negative pressure, the pericardial effusion enters the upper cavity of the cylinder 300 through the puncture needle 200, the hose 100 and the first main pipeline 500;

[0054] When the internal pressure of the lower cavity increases, the liquid inlet assembly connected to the first main pipeline 500 and located at the bottom is closed, and the liquid inlet assembly connected to the second main pipeline 600 and located at the bottom is opened. At this time, the gas-liquid in the lower cavity is pressed into the second main pipeline 600 and discharged.

[0055] When the first piston 310 and the second piston 320 move up and down synchronously, they can efficiently aspirate pericardial effusion. This movement mode can continuously change the pressure and volume of the upper cavity and the lower cavity, forming a stable pressure difference, so that the effusion is continuously inhaled and discharged. It is suitable for situations such as rapid decompression in acute cardiac tamponade, a large amount of exudative effusion (such as neoplastic pericardial effusion, uremic pericarditis), removal of non-bloody effusion (low-viscosity liquids such as serous / transudate), lavage, and irrigation.

[0056] When the first piston 310 moves up and down relative to the cylinder body 300 and the second piston 320 remains stationary relative to the cylinder body 300, the internal pressure of the lower cavity remains unchanged, and the internal pressure of the upper cavity changes. The liquid inlet assembly connected to the first main pipeline 500 and located at the top is opened / closed, and the liquid inlet assembly connected to the second main pipeline 600 and located at the top is closed / opened. At this time, the pericardial effusion continuously enters the upper cavity of the cylinder body 300 through the puncture needle 200, the hose 100, and the first main pipeline 500 and is pressed into the second main pipeline 600 and discharged. Because only the upper cavity generates pressure changes to aspirate and discharge the effusion, and the lower cavity does not play an auxiliary aspiration role, the effusion discharge efficiency is much lower than that when the first piston 310 and the second piston 320 move up and down synchronously relative to the cylinder body 300. This is applicable to the situation where the amount of liquid aspiration should not be too much during the first liquid aspiration to avoid rapid changes in the heart.

[0057] When the first piston 310 remains stationary relative to the cylinder body 300 and the second piston 320 moves up and down relative to the cylinder body 300, the internal pressure of the upper cavity remains unchanged, and the internal pressure of the lower cavity changes. The liquid inlet assembly connected to the first main pipeline 500 and located at the bottom is closed / opened, and the liquid inlet assembly connected to the second main pipeline 600 and located at the bottom is opened / closed. The pericardial effusion continuously enters the lower cavity of the cylinder body 300 through the puncture needle 200, the hose 100, and the first main pipeline 500 and is pressed into the second main pipeline 600 and discharged. Similarly, the effusion discharge efficiency is much lower than that when the first piston 310 and the second piston 320 move up and down synchronously relative to the cylinder body 300. This is applicable to the situation where the amount of liquid aspiration should not be too much during the first liquid aspiration, encapsulated effusion, diagnostic puncture, etc.

[0058] Moreover, the distance between the first piston 310 and the second piston 320 can be controlled. When the first piston 310 and the second piston 320 move synchronously to achieve suction, the volume of the cylinder 300 is fixed, that is, the amount of suction per synchronous movement of the first piston 310 and the second piston 320 to the extreme position is changed, so as to effectively adapt to different treatment situations.

[0059] When the first piston 310 is at the extreme position at the top end of the cylinder 300, the communication between the top liquid inlet assembly and the cylinder 300 is blocked, and the second piston 320 is at the extreme position at the bottom end of the cylinder 300, blocking the communication between the bottom liquid inlet assembly and the cylinder 300. At this time, medical staff can pass the needle for external perfusion of liquid medicine through the rubber head 700 to effectively prevent the leakage of liquid medicine, and realize the perfusion of liquid medicine into the patient's pericardial cavity or the flushing of the pericardial cavity. At this time, the pericardial effusion cannot be aspirated, and no additional valve needs to be set, reducing the operation of medical staff to avoid misoperation.

[0060] Please refer to Figure 8 , in an embodiment of the present invention, the bottom end of the first operating rod 330 is fixedly connected to the first piston 310, the bottom end of the second operating rod 340 is fixedly connected to the second piston 320, and sliding channels for the second operating rod 340 to pass through are provided inside the first operating rod 330 and the first piston 310. The inner wall of the sliding channel forms a clearance fit with the outer surface of the second operating rod 340, and the clearance size is 0.1-0.2 mm to ensure that the second operating rod 340 can slide freely.

[0061] Specifically, when the second operating rod 340 is kept stationary and the first operating rod 330 is pushed and pulled, the first operating rod 330 can drive the first piston 310 to slide freely through the clearance, realizing the independent movement of the first piston 310. When the second operating rod 340 is pushed and pulled and the first operating rod 330 is kept stationary, the second operating rod 340 can drive the second piston 320 to slide freely through the clearance. It is also possible to hold the first operating rod 330 and the second operating rod 340 simultaneously to drive the first piston 310 and the second piston 320 to move synchronously, which is fast and convenient to operate.

[0062] Please refer to Figure 9 , in an embodiment of the present invention, the bottom end of the first operating rod 330 is fixedly connected to the first piston 310, the outer side wall of the first operating rod 330 is slidably connected to the cylinder 300, a through hole is axially provided on the first operating rod 330, internal threads are provided on the inner wall of the through hole, external threads matching the internal threads are provided on the outer surface of the second operating rod 340, and the bottom end of the second operating rod 340 is rotatably connected to the second piston 320.

[0063] Specifically, by rotating the second operating rod 340 and holding the first operating rod 330, under the action of the internal and external threads, the second operating rod 340 moves relative to the first operating rod 330, that is, the second piston 320 moves relative to the first piston 310. In this case, the moving speed of the second piston 320 relative to the first piston 310 is slow, and precise control of the suction rate can be achieved.

[0064] Please refer to Figure 2 , Figure 3 and Figure 5 , in an embodiment of the present invention, the one-way plugging assembly 420 includes an elastic member 421 and a plugging member 422 capable of plugging the liquid inlet 410. The plugging member 422 can be made of rubber material. One end of the elastic member 421 is fixedly connected to the inner wall of the communication pipe 400, and the other end of the elastic member 421 abuts against the plugging member 422. The elastic member 421 is a spring;

[0065] Specifically, when the first piston 310 and the second piston 320 move, the pressure states in the upper and lower cavities of the cylinder 300 are changed. Under the action of the pressure, the plugging member 422 can be driven to move, and under the action of the elastic member 421, the plugging member 422 can plug the liquid inlet 410 or open the liquid inlet 410.

[0066] In an embodiment of the present invention, one end of the plugging member 422 close to the liquid inlet 410 is tapered, and the opening edge of the liquid inlet 410 is an annular inclined surface matching the tapered surface of the plugging member 422, so that the plugging member 422 can effectively fit the liquid inlet 410 to ensure a good sealing effect and avoid liquid backflow.

[0067] Please refer to Figure 5 , in an embodiment of the present invention, the plugging member 422 is a sphere, and the opening edge of the liquid inlet 410 is provided with an arc-shaped groove, so that the plugging member 422 can effectively fit the liquid inlet 410 to ensure a good sealing effect and avoid liquid backflow, and the discharge effect of tissue debris in purulent effusion is better.

[0068] In an embodiment of the present invention, the two communication pipes 400 of each liquid inlet assembly are coaxially arranged, so that the two communication pipes 400 are symmetrically arranged, reducing the flow deviation during synchronous suction and drainage.

[0069] Please refer to Figure 2 , in an embodiment of the present invention, a drain pipe 800 is connected to the top of the second main pipe 600, and one end of the drain pipe 800 away from the second main pipe 600 is inserted into an external waste liquid collection device / sampling device, facilitating the collection / sampling of waste liquid.

[0070] In one embodiment of the present invention, sealing rings (not shown in the figures) are fixedly sleeved outside the first piston 310 and the second piston 320 to improve the sealing effect. Specifically, annular grooves for sleeving the sealing rings can be provided outside the first piston 310 and the second piston 320, and the sealing rings are sleeved in the annular grooves.

[0071] Please refer to Figure 2 , in one embodiment of the present invention, receiving grooves are provided on the sides of the first piston 310 and the second piston 320 that are away from each other, so as to avoid a small amount of accumulated liquid existing in the upper part of the first piston 310 and the lower part of the second piston 320 when the first piston 310 and the second piston 320 move to the extreme positions inside the cylinder body 300, which may cause difficulty for the first piston 310 and the second piston 320 to move to the extreme positions. The receiving grooves are used to hold this small amount of accumulated liquid to prevent the accumulated liquid from affecting the normal movement of the pistons.

[0072] Please refer to Figure 7 , in one embodiment of the present invention, the cylinder body 300 is composed of a cylinder body 301, a top cover 302, and a bottom cover 303. The top cover 302 and the bottom cover 303 are detachably connected to the cylinder body 301 respectively. Specifically, internal threads are provided on the top cover 302 and the bottom cover 303, and external threads matching the internal threads are provided on the outer surfaces at both ends of the cylinder body 301 to achieve the detachable connection of the top cover 302 and the bottom cover 303 to the cylinder body 301 respectively, which is convenient for subsequent cleaning, sterilization, and disinfection, and improves the use safety and hygiene of the device.

[0073] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more unless otherwise specifically defined.

[0074] In the present invention, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the present invention, unless otherwise clearly specified or limited, a first feature being "on" or "under" a second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "under", "below" and "beneath" a second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0076] In the description of this specification, the description of reference terms such as "an embodiment", "some embodiments", "examples", "specific examples" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0077] In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0078] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clinical puncture device for cardiovascular medicine, comprising a flexible tube (100) and a puncture needle (200) mounted at one end of the flexible tube (100), characterized in that, Further included are: A cylinder body (300) in which a first piston (310) and a second piston (320) are slidably arranged along its axial direction. A first operating rod (330) is installed on the upper surface of the first piston (310). The top end of the first operating rod (330) penetrates through the cylinder body (300) and extends to the outside of the cylinder body (300). A second operating rod (340) is installed on the upper surface of the second piston (320). The top end of the second operating rod (340) sequentially penetrates through the first piston (310) and the first operating rod (330) and extends to the outside of the cylinder body (300). Two groups of liquid inlet assemblies provided at the top end and the bottom end of the cylinder body (300). Each group of liquid inlet assemblies includes: Two communicating pipes (400) communicated with the cylinder body (300). A liquid inlet (410) and a one-way sealing assembly (420) capable of elastic reset are arranged in the communicating pipe (400). When the first piston (310) moves to the extreme position at the top end of the cylinder body (300), the first piston (310) blocks the communication between the top liquid inlet assembly and the cylinder body (300). When the second piston (320) moves to the extreme position at the bottom end of the cylinder body (300), the second piston (320) blocks the communication between the bottom liquid inlet assembly and the cylinder body (300). A first main pipe (500) provided on one side of the cylinder body (300). The inside of the first main pipe (500) is communicated with the communicating pipes (400) at the top end and the bottom end on the same side. The bottom end of the first main pipe (500) is communicated with the other end of the hose (100). A second main pipe (600) provided on the other side of the cylinder body (300). The inside of the second main pipe (600) is communicated with the communicating pipes (400) at the top end and the bottom end on the same side. A rubber head (700) for needle puncture sealing of external perfusion of liquid medicine is provided on the side wall of the first main pipe (500).

2. The clinical puncture device for cardiovascular medicine according to claim 1, characterized in that, The bottom end of the first operating rod (330) is fixedly connected to the first piston (310). The bottom end of the second operating rod (340) is fixedly connected to the second piston (320). Sliding channels for the second operating rod (340) to pass through are provided inside the first operating rod (330) and the first piston (310). A clearance fit is formed between the inner wall of the sliding channel and the outer surface of the second operating rod (340).

3. The clinical puncture device for cardiovascular medicine according to claim 1, characterized in that, The bottom end of the first operating rod (330) is fixedly connected to the first piston (310). The outer side wall of the first operating rod (330) is slidably connected to the cylinder body (300). A through hole is axially formed in the first operating rod (330). Internal threads are provided on the inner wall of the through hole. External threads matched with the internal threads are provided on the outer surface of the second operating rod (340). The bottom end of the second operating rod (340) is rotatably connected to the second piston (320).

4. A cardiovascular medicine clinical puncture device according to claim 1, characterized in that, The one-way sealing assembly (420) includes an elastic member (421) and a sealing member (422) capable of sealing the liquid inlet (410). One end of the elastic member (421) is fixedly connected to the inner wall of the communicating pipe (400), and the other end of the elastic member (421) abuts against the sealing member (422).

5. The clinical puncture device for cardiovascular medicine according to claim 1, characterized in that, One end of the sealing member (422) close to the liquid inlet (410) is tapered. The opening edge of the liquid inlet (410) is an annular inclined surface matching the tapered surface of the sealing member (422).

6. The clinical puncture device for cardiovascular medicine according to claim 1, wherein, The plugging member (422) is a sphere, and the opening edge of the liquid inlet (410) is arranged as a circular arc groove.

7. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that, The two communicating pipes (400) of each liquid inlet assembly are coaxially arranged.

8. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that, A drain pipe (800) is connected to the top of the second main pipe (600).

9. A clinical puncture device for cardiovascular medicine according to claim 1, wherein, Sealing rings are fixedly sleeved on the outsides of the first piston (310) and the second piston (320).

10. The clinical puncture device for cardiovascular medicine according to claim 1, characterized in that, Receiving grooves are formed on the sides of the first piston (310) and the second piston (320) away from each other.

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