Clinical puncture device for cardiovascular medicine department

Abstract

The invention discloses a clinical puncture device for the cardiovascular medicine department, and relates to the field of medical instruments, the clinical puncture device for the cardiovascular medicine department comprises a hose and a puncture needle mounted at one end of the hose, and further comprises a cylinder, a first piston and a second piston are arranged in the cylinder in a sliding mode in the axial direction of the cylinder, and a first operating rod is mounted on the upper surface of the first piston; the top end of the first operating rod penetrates through the cylinder and extends out of the cylinder, 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 out of the cylinder. The first piston and the second piston synchronously move up and down relative to the cylinder, the pericardial effusion can be efficiently sucked, the upper cavity and the lower cavity alternately generate pressure and negative pressure through the synchronous movement mode, rapid suction and discharge of the pericardial effusion are achieved, and the pericardial effusion suction efficiency is improved. The device is suitable for various conditions such as rapid decompression, removal of a large amount of exudative effusion and non-bloody effusion, lavage and flushing of acute cardiac tamponade, and the suction efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to medical device technology, and in particular to a clinical puncture device for cardiovascular medicine. Background Art

[0002] In the clinical diagnosis and treatment of cardiovascular medicine, pericardiocentesis is an invasive medical procedure, which is mainly used to diagnose and treat diseases such as pericardial effusion. The pericardium is a thin membrane surrounding the heart, which plays a protective and supporting role. In some cases, such as pericardial effusion, pericarditis or cardiac tamponade, too much 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 effusion to relieve the pressure on the heart. At present, the clinical puncture devices commonly used in clinical cardiovascular medicine have exposed many disadvantages in actual application. During the puncture operation, the traditional method is to extract the effusion or gas through a syringe, but each time the effusion is extracted, the syringe needs to be removed and then discharged. The operation is cumbersome and continuous drainage is impossible. In addition, the design of some existing puncture devices is not reasonable. Some devices are not efficient in aspirating effusion, 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 emergency and rapid decompression, the existing suction devices often cannot meet the urgent clinical needs, which may delay the treatment time.

[0003] For example, a Chinese invention patent with authorization announcement number CN118766556B discloses a clinical puncture device for cardiovascular medicine, which includes a syringe, which has a barrel body and a piston arranged inside the syringe, the top of the piston penetrates the syringe and is fixedly connected to a pressing plate, the bottom of the syringe is connected to a puncture needle through a first control valve, and the syringe is arranged inside a fixed sleeve; a liquid extraction tube, which has a tube body and a liquid storage tube arranged at one end of the liquid extraction tube, the liquid storage tube is arranged at the bottom of the fixed plate, and the end of the liquid extraction tube away from the liquid storage tube is connected to the syringe through a second control valve; a medicine storage tank, which has a tank body and a heating device arranged inside the medicine storage tank, and the interior of the medicine storage tank is connected to the syringe. The medicine in the syringe is connected to the patient by a third control valve.

[0004] For example, a Chinese invention patent with authorization announcement number CN118680643B discloses a pericardiothoracic puncture and effusion drainage device, which includes a puncture mechanism and an effusion drainage mechanism, and the effusion drainage mechanism includes: a sealing disk, on which a liquid inlet tube and a liquid outlet tube are penetrated, the liquid inlet tube is coupled to the puncture mechanism via a hose fluid, and the liquid outlet tube is used to couple to an external effusion storage container; a cylinder, which is rotationally coupled to the occluding disk and is provided with a first cavity and a second cavity; wherein the The device is suitable for extracting and discharging the accumulated liquid in the first cavity and the second cavity alternately by utilizing the liquid inlet pipe and the liquid outlet pipe through the relative rotation of the sealing disk and the cylinder, so as to realize uninterrupted extraction; it realizes the alternating connection between the first cavity and the second cavity and the liquid inlet pipe and the liquid outlet pipe by rotating the cylinder, so as to realize continuous extraction, and the connection seal of the pipeline completely depends on the degree of compression between the sealing disk and the cylinder. During operation, it is easy to make the cylinder difficult to rotate due to excessive friction, and liquid leakage is easy to occur under continuous use. Summary of the invention

[0005] The purpose of the present invention is to provide a clinical puncture device for cardiovascular medicine to solve the problems of the pericardial puncture device in the prior art, such as complicated operation, low suction efficiency and difficulty in adapting to different treatment situations.

[0006] In order to achieve the above object, the present invention provides the following technical solution: a clinical puncture device for cardiovascular medicine, comprising a hose and a puncture needle installed at one end of the hose, and further comprising: A cylinder, wherein a first piston and a second piston are slidably arranged in the cylinder along the axial direction thereof, a first operating rod is installed on the upper surface of the first piston, the top end of the first operating rod penetrates the cylinder and extends to the outside of the cylinder, a second operating rod is installed on the upper surface of the second piston, the top end of the second operating rod penetrates the first piston and the first operating rod in sequence and extends to the outside of the cylinder; Two groups of liquid inlet components are arranged at the top and bottom of the cylinder, and each group of liquid inlet components includes: Two connecting pipes connected to the cylinder, wherein the connecting pipes are provided with a liquid inlet and a one-way blocking component capable of elastic reset; When the first piston moves to the upper limit position of the cylinder, the first piston blocks the communication between the upper liquid inlet assembly and the cylinder; When the second piston moves to the limit position at the bottom end of the cylinder, the second piston blocks the communication between the bottom end liquid inlet assembly and the cylinder; A first main pipeline is arranged on one side of the cylinder, the interior of the first main pipeline is connected to the connecting pipes at the top and bottom ends of the same side, and the bottom end of the first main pipeline is connected to the other end of the hose; A second main pipeline is arranged on the other side of the cylinder, the interior of the second main pipeline is connected to the connecting pipes at the top and bottom ends of the same side; A rubber head for needle puncture sealing for external injection of liquid medicine is arranged on the side wall of the first main pipeline.

[0007] Furthermore, 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. The first operating rod and the first piston are both provided with sliding channels for the second operating rod to pass through, and the inner wall of the sliding channel forms a clearance fit with the outer surface of the second operating rod.

[0008] Furthermore, the bottom end of the first operating rod is fixedly connected to the first piston, the outer wall of the first operating rod is slidably connected to the cylinder, a through hole is opened on the first operating rod along its axial direction, an internal thread is provided on the inner wall of the through hole, the outer surface of the second operating rod is provided with an external thread matching the internal thread, and the bottom end of the second operating rod is rotatably connected to the second piston.

[0009] Furthermore, the one-way blocking component 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 connecting pipe, and the other end of the elastic member abuts against the blocking member.

[0010] Furthermore, one end of the blocking member close to the liquid inlet is configured 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.

[0011] Furthermore, the blocking member is a sphere, and the opening edge of the liquid inlet is arranged in an arc-shaped groove.

[0012] Furthermore, the two connecting pipes of each group of liquid inlet components are coaxially arranged.

[0013] Furthermore, the top end of the second main pipeline is connected to a drain pipe.

[0014] Furthermore, sealing rings are fixedly sleeved on the outside of the first piston and the second piston.

[0015] Furthermore, a receiving groove is provided on one side of the first piston and the other side of the second piston which are away from each other.

[0016] Compared with the prior art, the clinical puncture device for cardiovascular medicine provided by the present invention can efficiently aspirate pericardial effusion by synchronously moving the first piston and the second piston up and down relative to the cylinder. This synchronous movement mode enables the upper cavity and the lower cavity to alternately generate pressure and negative pressure, thereby realizing rapid aspiration and discharge of pericardial effusion. It is suitable for various situations such as acute cardiac tamponade requiring rapid decompression, large amounts of exudative effusion, removal of non-bloody effusion, lavage, and flushing, and greatly improves the aspiration efficiency. By setting the first piston and the second piston, a variety of operation modes can be realized. When the first piston moves up and down relative to the cylinder body and the second piston does not move relative to the cylinder body, the efficiency of discharging the accumulated fluid is much lower than that of discharging the accumulated fluid when the piston moves synchronously. This is suitable for the initial extraction of fluid when the amount of fluid to be extracted should not be too much. When the first piston does not move relative to the cylinder body and the second piston moves up and down relative to the cylinder body, the amount of fluid to be extracted can also be controlled. This is suitable for the initial extraction of fluid, encapsulated fluid, diagnostic puncture, etc. By controlling the distance between the first piston and the second piston, the amount of suction each time the piston moves synchronously to the extreme position is changed, which can effectively adapt to different treatment situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of an external three-dimensional structure provided by an embodiment of the present invention; Figure 2 A first overall cross-sectional structural schematic diagram provided by an embodiment of the present invention; Figure 3 The embodiment of the present invention provides Figure 2 A is an enlarged schematic diagram; Figure 4 The embodiment of the present invention provides Figure 2 The enlarged schematic diagram of point B in FIG. Figure 5 A schematic diagram of the explosion structure of the one-way plugging assembly and the connecting pipe provided in an embodiment of the present invention; Figure 6 A second overall cross-sectional structural schematic diagram provided by an embodiment of the present invention; Figure 7 A schematic diagram of the exploded structure of the barrel, top cover and bottom cover provided in an embodiment of the present invention; Figure 8 A schematic diagram of a combination of a first piston, a second piston, a first operating rod and a second operating rod provided in an embodiment of the present invention; Fig. 9 A schematic diagram of another combination of a first piston, a second piston, a first operating rod and a second operating rod provided in an embodiment of the present invention.

[0019] Description of reference numerals: 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 component; 421, elastic member; 422, blocking member; 500, first main pipeline; 600, second main pipeline; 700, rubber head; 800, drainage pipe. DETAILED DESCRIPTION

[0020] In order 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] See also Figures 1 to 6 A clinical puncture device for cardiovascular medicine includes 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 and an outer diameter of 5-7 mm. The length can be customized according to actual needs. The puncture needle 200 is made of stainless steel, and the diameter of the needle body matches the inner diameter of the hose 100 to ensure good sealing and liquid flowability. The needle tip adopts a diamond design with a sharp cutting edge, which can easily penetrate tissues such as the pericardium. It should be understood that the above is only an exemplary introduction to the hose 100 and the puncture needle 200. 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 is not limited to this, and also includes: The cylinder 300 has a first piston 310 and a second piston 320 slidably arranged inside the cylinder 300 along its axial direction. The first piston 310 and the second piston 320 are both made of medical rubber material, which has good elasticity and sealing performance. The outer diameter of the piston is closely matched with the inner diameter of the cylinder 300 to ensure that there will be no liquid leakage during the movement; a first operating rod 330 is installed on the upper surface of the first piston 310, and the top end of the first operating rod 330 passes through the cylinder 300 and extends to the outside of the cylinder 300. The extension 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, and the top end of the second operating rod 340 passes through the first piston 310 and the first operating rod 330 in turn and extends to the outside of the cylinder 300. The first operating rod 330 and the second operating rod 340 are both made of stainless steel, and the surface is anti-slip treated, which is convenient for medical staff to operate; Two groups of liquid inlet components are arranged at the top and bottom of the cylinder 300, each group of liquid inlet components includes: Two connecting tubes 400 connected to the barrel 300, the connecting tubes 400 are made of medical plastic material, such as polypropylene (PP), and are provided with a liquid inlet 410 and a one-way blocking component 420 capable of elastic reset; When the first piston 310 moves to the upper limit position of the cylinder 300, the first piston 310 blocks the communication between the upper liquid inlet assembly and the cylinder 300; When the second piston 320 moves to the limit position at the bottom end of the cylinder 300, the second piston 320 blocks the communication between the bottom end liquid inlet assembly and the cylinder 300; A first main pipe 500 is provided on one side of the cylinder 300, the interior of the first main pipe 500 is connected to the connecting pipes 400 at the top and bottom of the same side, and the bottom end of the first main pipe 500 is connected to the other end of the hose 100; A second main pipeline 600 is provided on the other side of the cylinder 300, and the interior of the second main pipeline 600 is connected with the connecting pipes 400 at the top and bottom ends of the same side; A rubber head 700 is provided on the side wall of the first main conduit 500 for needle puncture sealing for external injection of liquid medicine. The rubber head 700 is made of medical silicone material and has good elasticity and sealing properties. The center thickness of the rubber head 700 is 2-3mm, and it can tightly wrap the needle after needle puncture to prevent liquid medicine leakage.

[0022] When performing pericardial puncture to aspirate pericardial effusion, the effusion or gas is traditionally extracted through a syringe, but each time the effusion is extracted, the syringe needs to be removed and then discharged, which is cumbersome and cannot be discharged continuously. In addition, the design of some existing puncture devices is not reasonable. Some devices are not efficient in aspirating effusion, and it is difficult to quickly and effectively remove pericardial effusion. In particular, in the face of critical situations such as acute cardiac tamponade that require emergency and rapid decompression, existing aspiration devices often cannot meet the urgent clinical needs, which may delay the treatment time. To this end, the present application allows the first piston 310 and the second piston 320 to move relative to the cylinder 300 through the first operating rod 330 and the second operating rod 340 after the medical staff inserts the puncture needle 200 into the patient's pericardial cavity. 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 by the first operating rod 330, and the second piston 320 is controlled to move by the second operating rod 340. The movement of the first piston 310 and the second piston 320 has the following conditions: When the first piston 310 and the second piston 320 move upward synchronously relative to the cylinder 300, the internal pressure of the upper cavity increases, the liquid inlet component connected to the first main pipeline 500 and located at the top is closed (the one-way blocking component 420 in the connecting pipe 400 of the liquid inlet component blocks the liquid inlet 410), and the liquid inlet component 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 component 420 in the connecting pipe 400 of the liquid inlet component does not block the liquid inlet 410), at this time, the gas and liquid in the upper cavity are pressed into the second main pipeline 600 and discharged; The negative pressure inside the lower cavity increases, the liquid inlet assembly connected to the first main conduit 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 the liquid inlet assembly does not block the liquid inlet port 410), and the liquid inlet assembly connected to the second main conduit 600 and located at the bottom is closed (the one-way blocking assembly 420 in the connecting pipe 400 of the liquid inlet assembly blocks the liquid inlet port 410). At this time, under the action of 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 conduit 500; When the first piston 310 and the second piston 320 move downward synchronously relative to the cylinder 300, similarly, the negative pressure inside the upper cavity increases, the liquid inlet assembly connected to the first main conduit 500 and located at the top is opened, and the liquid inlet assembly connected to the second main conduit 600 and located at the top is closed. At this time, under the action of negative pressure, pericardial effusion enters the upper cavity of the cylinder 300 through the puncture needle 200, the hose 100 and the first main conduit 500; The pressure inside 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 and liquid in the lower cavity are pressed into the second main pipeline 600 and discharged; When the first piston 310 and the second piston 320 move up and down synchronously, the pericardial effusion can be efficiently sucked out. 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 sucked in and discharged. It is suitable for acute cardiac tamponade requiring rapid decompression, large amounts of exudative effusion (such as tumor pericardial effusion, uremic pericarditis), non-bloody effusion removal (serous / transudate and other low-viscosity liquids), lavage, flushing, etc.; When the first piston 310 moves up and down relative to the cylinder 300 and the second piston 320 does not move relative to the cylinder 300, the pressure inside the lower cavity remains unchanged, while the pressure inside the upper cavity changes. The liquid inlet assembly connected to the first main conduit 500 and located at the top is opened / closed, and the liquid inlet assembly connected to the second main conduit 600 and located at the top is closed / opened. At this time, pericardial effusion continuously enters the upper cavity of the cylinder 300 through the puncture needle 200, the hose 100 and the first main conduit 500 and is pressed into the second main conduit 600 and discharged. Because only the upper cavity produces pressure changes to suck and discharge the effusion, the lower cavity does not play an auxiliary suction role, and the effusion discharge efficiency is much lower than the effusion discharge efficiency when the first piston 310 and the second piston 320 move up and down synchronously relative to the cylinder 300. This is suitable for the initial extraction of fluid when the amount of fluid drawn is not too much to avoid sudden changes in the heart. The first piston 310 is stationary relative to the cylinder 300, and when the second piston 320 moves up and down relative to the cylinder 300, the internal pressure of the upper cavity remains unchanged, and the internal pressure of the lower cavity changes, the liquid inlet component connected to the first main pipeline 500 and located at the bottom is closed / opened, and the liquid inlet component connected to the second main pipeline 600 and located at the bottom is opened / closed, and the pericardial effusion continuously enters the lower cavity of the cylinder 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 the effusion discharge efficiency when the first piston 310 and the second piston 320 move up and down synchronously relative to the cylinder 300, so it is suitable for initial extraction, encapsulated effusion, diagnostic puncture, etc., and the amount of fluid extraction should not be too much; Furthermore, 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 realize suction, the volume of the cylinder 300 is fixed, that is, the amount of suction each time the first piston 310 and the second piston 320 move synchronously to the extreme position is changed, thereby effectively adapting to different treatment situations; When the first piston 310 is located at the upper limit position of the cylinder 300, the connection between the upper liquid inlet assembly and the cylinder 300 is blocked, and the second piston 320 is located at the lower limit position of the cylinder 300, the connection between the lower liquid inlet assembly and the cylinder 300 is blocked. At this time, the medical staff can pass the needle of the external perfusion medicine through the rubber head 700 to effectively prevent the leakage of the medicine, and achieve the perfusion of the medicine into the patient's pericardial cavity or the flushing of the pericardial cavity. At this time, the pericardial effusion cannot be aspirated, and there is no need to set an additional valve, which reduces the operation of medical staff and avoids the occurrence of misoperation.

[0023] See also Figure 8 In one embodiment of the present invention, the bottom end of the first operating rod 330 is fixedly connected to the first piston 310, and the bottom end of the second operating rod 340 is fixedly connected to the second piston 320. The first operating rod 330 and the first piston 310 are both provided with a sliding channel for the second operating rod 340 to pass through. 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 0.1-0.2mm, so as to ensure that the second operating rod 340 can slide freely. Specifically, when the second operating rod 340 is kept stationary and the first operating rod 330 is pushed or pulled, the first operating rod 330 can drive the first piston 310 to slide freely through the gap, so that the first piston 310 can move independently. When the second operating rod 340 is pushed or 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 gap. The first operating rod 330 and the second operating rod 340 can also be held at the same time to drive the first piston 310 and the second piston 320 to move synchronously, so that the operation is quick.

[0024] See also Fig. 9 In one embodiment of the present invention, the bottom end of the first operating rod 330 is fixedly connected to the first piston 310, the outer wall of the first operating rod 330 is slidably connected to the cylinder 300, a through hole is opened on the first operating rod 330 along its axial direction, and an inner thread is provided on the inner wall of the through hole, and an outer surface of the second operating rod 340 is provided with an outer thread matching the inner thread, and the bottom end of the second operating rod 340 is rotatably connected to the second piston 320; Specifically, by rotating the second operating rod 340 and holding the first operating rod 330, under the action of the internal thread and the external thread, 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 second piston 320 moves at a slower speed relative to the first piston 310, so that precise control of the suction rate can be achieved.

[0025] See also Figure 2 , Figure 3 and Figure 5 In one embodiment of the present invention, the one-way blocking component 420 includes an elastic member 421 and a blocking member 422 capable of blocking the liquid inlet 410. The blocking member 422 may be made of rubber. One end of the elastic member 421 is fixedly connected to the inner wall of the connecting pipe 400, and the other end of the elastic member 421 abuts against the blocking member 422. The elastic member 421 is a spring. Specifically, when the first piston 310 and the second piston 320 move, the pressure state in the upper cavity and the lower cavity of the cylinder 300 is changed. Under the action of pressure, the blocking member 422 can be driven to move, and under the action of the elastic member 421, the blocking member 422 can block the liquid inlet 410 or open the liquid inlet 410.

[0026] In one embodiment of the present invention, the end of the sealing member 422 close to the liquid inlet 410 is conically arranged, and the opening edge of the liquid inlet 410 is an annular inclined surface matching the conical surface of the sealing member 422, so that the sealing member 422 can effectively fit the liquid inlet 410 to ensure a good sealing effect and avoid liquid backflow.

[0027] See also Figure 5 In one embodiment of the present invention, the blocking member 422 is a sphere, and the opening edge of the liquid inlet 410 is set in an arc-shaped groove, so that the blocking member 422 can effectively fit the liquid inlet 410 to ensure a good sealing effect, avoid liquid reflux, and have a better effect on the discharge of tissue debris in purulent effusion.

[0028] In one embodiment of the present invention, the two connecting pipes 400 of each group of liquid inlet components are coaxially arranged so that the two connecting pipes 400 are symmetrically arranged to reduce the flow deviation during synchronous suction and discharge.

[0029] See also Figure 2 In one embodiment of the present invention, the top end of the second main pipeline 600 is connected to a drain pipe 800, and the end of the drain pipe 800 away from the second main pipeline 600 is inserted into an external waste liquid collection device / sampling device to facilitate waste liquid collection / sampling.

[0030] In one embodiment of the present invention, the first piston 310 and the second piston 320 are both fixedly sleeved with sealing rings (not shown in the figure) on their exteriors to improve the sealing effect. Specifically, annular grooves for sleeved sealing rings may be provided on the exteriors of the first piston 310 and the second piston 320, and the sealing rings are sleeved in the annular grooves.

[0031] See also Figure 2 In one embodiment of the present invention, a receiving groove is provided on the side away from the first piston 310 and the second piston 320 to avoid a small amount of accumulated liquid on 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 position in the cylinder 300, which makes it difficult for the first piston 310 and the second piston 320 to move to the extreme position. The small amount of accumulated liquid is accommodated by the receiving groove to prevent the accumulated liquid from affecting the normal movement of the piston.

[0032] See also Figure 7 In one embodiment of the present invention, the barrel 300 is composed of a barrel body 301, a top cover 302 and a bottom cover 303, and the top cover 302 and the bottom cover 303 are detachably connected to the barrel body 301. Specifically, the top cover 302 and the bottom cover 303 are provided with internal threads, and the outer surfaces of both ends of the barrel body 301 are provided with external threads matching the internal threads, so as to realize the detachable connection between the top cover 302 and the bottom cover 303 and the barrel body 301, respectively, to facilitate subsequent cleaning, sterilization and disinfection, and improve the safety and hygiene of the device.

[0033] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction 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 necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0037] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clinical puncture device for cardiovascular medicine, comprising a hose (100) and a puncture needle (200) mounted on one end of the hose (100), characterized in that: Also includes: A cylinder (300) is provided with a first piston (310) and a second piston (320) slidably arranged in 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) passes through the cylinder (300) and extends to the outside of the cylinder (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) passes through the first piston (310) and the first operating rod (330) in sequence and extends to the outside of the cylinder (300). Two groups of liquid inlet components are arranged at the top and bottom of the cylinder (300), and each group of liquid inlet components includes: Two connecting pipes (400) connected to the cylinder (300), wherein the connecting pipes (400) are provided with a liquid inlet (410) and a one-way blocking component (420) capable of elastic reset; When the first piston (310) moves to the top limit position of the cylinder (300), the first piston (310) blocks the communication between the top liquid inlet assembly and the cylinder (300); When the second piston (320) moves to the limit position at the bottom end of the cylinder (300), the second piston (320) blocks the communication between the bottom end liquid inlet assembly and the cylinder (300); A first main pipeline (500) is arranged on one side of the cylinder (300), the interior of the first main pipeline (500) is connected to the connecting pipes (400) at the top and bottom ends of the same side, and the bottom end of the first main pipeline (500) is connected to the other end of the hose (100); A second main pipeline (600) is arranged on the other side of the cylinder (300), the interior of the second main pipeline (600) being connected to the connecting pipes (400) at the top and bottom ends of the same side; A rubber head (700) for needle puncture sealing for external injection of liquid medicine is provided on the side wall of the first main pipeline (500).

2. A 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), and the bottom end of the second operating rod (340) is fixedly connected to the second piston (320). The first operating rod (330) and the first piston (310) are both provided with a sliding channel for the second operating rod (340) to pass through, and the inner wall of the sliding channel forms a clearance fit with the outer surface of the second operating rod (340).

3. A 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 wall of the first operating rod (330) is slidably connected to the cylinder (300), a through hole is opened on the first operating rod (330) along its axial direction, the inner wall of the through hole is provided with an internal thread, the outer surface of the second operating rod (340) is provided with an external thread matching the internal thread, and the bottom end of the second operating rod (340) is rotatably connected to the second piston (320).

4. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that: The one-way blocking component (420) comprises an elastic member (421) and a blocking member (422) capable of blocking the liquid inlet (410); one end of the elastic member (421) is fixedly connected to the inner wall of the connecting pipe (400), and the other end of the elastic member (421) is in contact with the blocking member (422).

5. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that: One end of the blocking member (422) close to the liquid inlet (410) is arranged in a conical shape, and the opening edge of the liquid inlet (410) is an annular inclined surface matching the conical surface of the blocking member (422).

6. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that: The blocking member (422) is a sphere, and the opening edge of the liquid inlet (410) is arranged in the form of an arc-shaped groove.

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

8. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that: The top end of the second main pipeline (600) is connected to a liquid discharge pipe (800).

9. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that: The first piston (310) and the second piston (320) are both fixedly sleeved with sealing rings on their exteriors.

10. A clinical puncture device for cardiovascular medicine according to claim 1, characterized in that: A receiving groove is provided on one side of the first piston (310) and the other side of the second piston (320) that are away from each other.

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