Drainage fluid collection device after cardiac surgery

Abstract

The application discloses a postoperative heart drainage liquid collection device and relates to the field of postoperative medical appliances, which comprises two adapter pipes, two sections of drainage pipes and a three-way valve. The two adapter pipes are located between the two sections of drainage pipes, and the two ends of the two adapter pipes are connected with the two sections of drainage pipes respectively. The three-way valve is located between the two adapter pipes, and the two interfaces of the three-way valve are connected with the other ends of the two adapter pipes respectively. A liquid collecting bottle is located on one side of the three-way valve. The three-way valve and the liquid collecting bottle are integrated in the drainage pipeline. When the drainage liquid is collected, the drainage pipe does not need to be clamped. The three-way valve is used to switch the passage to achieve the interception and collection of the drainage liquid. The risk of interruption of drainage, backflow of drainage liquid and pericardial tamponade is avoided, and the medical safety hazard is eliminated. In addition, the negative pressure assembly and the liquid collecting bottle are used to actively generate negative pressure to accelerate the drainage liquid into the liquid collecting bottle.

Description

Technical Field

[0001] This invention relates to the field of postoperative medical devices, specifically a device for collecting drainage fluid after cardiac surgery. Background Technology

[0002] Following cardiac surgery, pericardial, mediastinal, and chest drainage tubes are placed and connected to drainage bottles via connecting tubes. In clinical practice, it is sometimes necessary to collect drainage fluid for laboratory tests. However, directly collecting the fluid from the drainage bottle is prone to contamination, and the sterile water in closed chest drainage bottles can dilute the drainage fluid, leading to inaccurate test results. Currently, most methods involve clamping the connecting tube with a needle, allowing the drainage fluid to flow into the tube under its own weight, and then puncturing the tube with a syringe to extract the drainage fluid. This procedure has the following disadvantages: 1. During the clamping of the connecting tube, there is no negative pressure in the drainage tube, or even positive pressure, which may cause poor drainage, backflow of drainage fluid, or even cardiac tamponade, posing a medical safety hazard. 2. The liquid volume in the connecting tube is limited and cannot be measured, which may not meet the needs of laboratory testing. 3. The integrity of the tube wall at the puncture site will be damaged, leading to air and fluid leakage, which will seriously affect the subsequent drainage effect; 4. Each extraction requires re-puncture, which is inconvenient and increases the risk. Summary of the Invention

[0003] The purpose of this invention is to provide a device for collecting postoperative cardiac drainage fluid in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a postoperative cardiac drainage fluid collection device, comprising two connecting tubes located between two drainage tubes, each connecting tube having one end connected to one of the two drainage tubes; a three-way valve located between the two connecting tubes, with two ports of the three-way valve connected to the other ends of the two connecting tubes; and a collection bottle located on one side of the three-way valve, with a third connection on the upper outer wall of the collection bottle connected to the three-way valve. The collection bottle has a first port connected to the first port, a third port at the bottom, a second two-way valve at the lower end of the third port, and a second port at the top. A negative pressure assembly, comprising a flexible negative pressure container, is located above the collection bottle and has a connection port at its bottom. This connection port is connected to the second port via the first two-way valve. The negative pressure assembly also has a one-way valve to allow only air to escape from the negative pressure assembly to the outside atmosphere.

[0005] As a further aspect of the present invention: the diameter of the adapter tube matches the diameter of the drainage tube, and the adapter tube and the drainage tube are integrally formed and connected.

[0006] As a further aspect of the present invention: the liquid collection bottle has a cylindrical structure, and the effective volume of the liquid collection bottle is 60ml.

[0007] As a further embodiment of the present invention: the negative pressure component is a hollow cylinder or a hollow sphere, and the negative pressure component is made of medical elastic material.

[0008] As a further aspect of the present invention: the outlet end of the second dual-way valve is a needleless sampling interface, which is a standard Luer male connector and a locking Luer connector, used to be screwed into the Luer female connector on the syringe.

[0009] As a further aspect of the present invention: the liquid collection bottle is made of rigid transparent plastic, and the liquid collection bottle is engraved with scale markings.

[0010] As a further embodiment of the present invention: the scale markings are engraved on the inner wall of the collection bottle, and the scale markings are raised ridges arranged circumferentially along the inner wall of the bottle. The raised ridges are perpendicular to the axis of the bottle, and two adjacent raised ridges constitute a scale unit.

[0011] Compared with the prior art, the beneficial effects of the present invention are: This invention integrates a three-way valve and a collection bottle into the drainage tubing. When collecting drainage fluid, there is no need to clamp the drainage tube; the three-way valve allows for the interception and collection of the drainage fluid by switching the flow path. This avoids the risks of drainage interruption, backflow of drainage fluid, and cardiac tamponade, eliminating potential medical safety hazards. Furthermore, the combination of a negative pressure component and the collection bottle actively generates negative pressure to accelerate the flow of drainage fluid into the collection bottle, solving the problem of limited fluid storage capacity in the connecting tube and inability to meet testing requirements in traditional methods. The collection bottle also features graduations for accurate measurement. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is another perspective of the present invention; Figure 3 This is a schematic cross-sectional view of the present invention.

[0013] In the diagram: 1. Adapter pipe; 2. Three-way valve; 3. Collection bottle; 31. First port; 32. Second port; 33. Third port; 34. Scale markings; 4. First two-way valve; 5. Second two-way valve; 6. Negative pressure assembly; 61. Connection port; 7. Check valve. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figures 1-3 In this embodiment of the invention, the postoperative drainage fluid collection device for heart surgery includes two connecting tubes 1, which are located between two drainage tubes, and one end of each connecting tube 1 is connected to the two drainage tubes respectively. Three-way valve 2, the three-way valve 2 is located between the two adapter pipes 1, and two of the ports of the three-way valve 2 are respectively connected to the other end of the two adapter pipes 1; The liquid collecting bottle 3 is located on one side of the three-way valve 2. The upper outer wall of the liquid collecting bottle 3 is provided with a first port 31 that is connected to the third interface of the three-way valve 2. The bottom of the liquid collecting bottle 3 is provided with a third port 33. A second two-way valve 5 is installed at the lower end of the third port 33. The top of the liquid collecting bottle 3 is provided with a second port 32. The liquid collecting bottle 3 is made of hard transparent plastic and has scale markings 34 engraved on it. The negative pressure component 6 includes a soft negative pressure container. The negative pressure component 6 is located above the liquid collection bottle 3, and the bottom of the negative pressure component 6 is provided with a connection port 61. The connection port 61 is connected to the second pipe port 32 through a first double-way valve 4. The negative pressure component 6 is also equipped with a one-way valve 7, which is used to allow only air to be discharged from the negative pressure component 6 to the outside atmosphere.

[0016] In this embodiment, by adding this device between the drainage tubes, it is not necessary to continuously clamp the connecting tubes and perform punctures, and negative pressure suction can be maintained. The required amount of drainage fluid can be easily retained in the graduated device and then released. The operation is simple, safe, non-invasive, sterile, and can be repeated multiple times.

[0017] In this design, the drainage tube diameter is 8mm, therefore the diameter of the adapter tube 1 is also 8mm, ensuring consistent flow channel cross-sectional area and preventing increased drainage resistance. The three-way valve 2 has four operating states: the first state is that the upper adapter tube 1 is connected to the collection bottle 3, while the lower adapter tube is closed; the second state is that the upper and lower adapter tubes 1 are directly connected, and the collection bottle 3 interface is closed; the third state is fully closed; and the fourth state is fully open (this state is not used during operation). These are the functions of the existing medical three-way valve 2, and will not be elaborated further.

[0018] The collection bottle 3 is made of rigid transparent plastic material (such as polycarbonate, polypropylene or polyvinyl chloride), which has good transparency, mechanical strength and chemical stability, making it easy to observe the properties of the drainage fluid and can withstand routine sterilization treatment.

[0019] This device is a disposable sterile kit. In clinical use, the two connecting tubes 1 are connected to the two drainage tubes respectively, or a one-piece molded drainage tube with this device is used directly. The three-way valve 2 is initially in the second position to ensure smooth routine drainage. When it is necessary to collect drainage fluid, the three-way valve 2 is operated to the first position, i.e., the upper end of the connecting tube is connected to the collection bottle 3, and the lower end of the connecting tube is closed. At this time, the first double-way valve 4 and the second double-way valve 5 are closed. Under the action of gravity, the drainage fluid flows along the drainage tube, connecting tube 1, and the first tube opening 31 into the collection bottle 3. The volume is observed through the scale mark 34. If the drainage fluid flows in slowly or needs to be collected more quickly, first squeeze the negative pressure component 6 by hand, and the air inside will be expelled through the one-way valve 7. Then open the first double-way valve 4 to connect the collection bottle 3 with the negative pressure component 6, and release your hand. The negative pressure component 6 will return to its original shape due to its elasticity, and air will be drawn from the collection bottle 3 through the first double-way valve 4, creating a negative pressure inside the collection bottle 3, thereby accelerating the drainage fluid into the collection bottle 3. The one-way valve ensures that the air flows in one direction and maintains a stable negative pressure.

[0020] When the drainage fluid volume in collection bottle 3 reaches the required mark, close the first double-way valve 4 and open the second double-way valve 5. Connect the sterile syringe to the output end of the second double-way valve 5 and draw up the drainage fluid for testing. After sampling, close the second double-way valve 5 and remove the syringe. After sampling, operate the three-way valve 2 to its second position, closing the interface of collection bottle 3 and restoring normal drainage. The device can be retained in the drainage tubing for future use.

[0021] Please refer to this carefully. Figures 1-3 The diameter of the adapter tube 1 matches the diameter of the drainage tube, and the adapter tube 1 and the drainage tube are integrally formed and connected.

[0022] In this embodiment, the two adapter pipes 1 can be parts of the drainage pipes at both ends, avoiding problems such as air leakage and liquid leakage that may be caused by loose connections at multiple points.

[0023] Please refer to this carefully. Figures 1-3 The collection bottle 3 has a cylindrical structure and an effective volume of 60ml.

[0024] In this embodiment, the volume design meets the routine clinical needs for a single collection of drainage fluid (usually 5-20 ml), while also providing sufficient capacity for multiple collections or tests requiring larger sample volumes, and keeps the device compact for easy clinical operation.

[0025] Please refer to this carefully. Figures 1-3The negative pressure component 6 is a hollow cylinder or a hollow sphere, and the negative pressure component 6 is made of medical elastic material.

[0026] In this embodiment: made of medical-grade elastic material (such as medical-grade silicone, medical-grade rubber, or thermoplastic elastomer), negative pressure can be generated by manual extrusion. The cylindrical structure of the negative pressure assembly provides a larger volume and a more uniform compression stroke, while the spherical structure is more ergonomically designed for easy one-handed extrusion.

[0027] Please refer to this carefully. Figures 1-3 The outlet end of the second double-way valve 5 is a needleless sampling interface. The interface is a standard Luer male connector and a locking Luer connector, which is used to tighten the connection with the Luer female connector on the syringe.

[0028] In this embodiment: This design can achieve a sealed connection with a standard syringe without the need for a needle. During operation, the syringe interface can be directly screwed or plugged into the Luer connector to complete the sampling, avoiding the risk of needle prick, ensuring the sterility of the sampling process, and ensuring a firm connection that will not fall off during the sampling process.

[0029] Please refer to this carefully. Figures 1-3 The scale mark 34 is engraved on the inner wall of the collection bottle 3. The scale mark 34 is a raised ridge line set along the circumference of the inner wall of the bottle. The raised ridge line is perpendicular to the axis of the bottle body, and two adjacent raised ridge lines form a scale unit.

[0030] In this embodiment: When the drainage fluid flows into the collection bottle, the liquid forms a clear meniscus at the raised ridge, which facilitates accurate reading. The raised ridge can break up tiny air bubbles attached to the liquid surface, preventing air bubbles from accumulating and obstructing the view, and avoiding reading errors caused by air bubble interference. The inner wall engraving design avoids the problem of the outer wall scale becoming blurred due to wear and contamination, and it can remain clear even after long-term use.

[0031] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for collecting postoperative cardiac drainage fluid, characterized in that, include: Two adapter pipes (1) are located between two drainage pipes, and one end of each adapter pipe (1) is connected to the two drainage pipes respectively. Three-way valve (2), the three-way valve (2) is located between the two adapter pipes (1), and two ports of the three-way valve (2) are respectively connected to the other end of the two adapter pipes (1); A collection bottle (3) is located on one side of the three-way valve (2), and the upper outer wall of the collection bottle (3) is provided with a first port (31) that is connected to the third interface of the three-way valve (2). The bottom end of the collection bottle (3) is provided with a third port (33), and the lower end of the third port (33) is equipped with a second double-way valve (5). The top of the collection bottle (3) is provided with a second port (32). The negative pressure assembly (6) includes a soft negative pressure container. The negative pressure assembly (6) is located above the collection bottle (3), and the bottom of the negative pressure assembly (6) is provided with a connection port (61). The connection port (61) is connected to the second pipe port (32) through a first two-way valve (4). The negative pressure assembly (6) is also equipped with a one-way valve (7) to allow only air to be discharged from the negative pressure assembly (6) to the outside atmosphere.

2. The postoperative cardiac drainage fluid collection device according to claim 1, characterized in that, The diameter of the adapter tube (1) matches the diameter of the drainage tube, and the adapter tube (1) and the drainage tube are integrally formed and connected.

3. The postoperative cardiac drainage fluid collection device according to claim 2, characterized in that, The collection bottle (3) has a cylindrical structure and an effective volume of 60 ml.

4. The postoperative cardiac drainage fluid collection device according to claim 3, characterized in that, The negative pressure component (6) is a hollow cylinder or a hollow sphere, and the negative pressure component (6) is made of medical elastic material.

5. The postoperative cardiac drainage fluid collection device according to claim 4, characterized in that, The outlet end of the second double-port valve (5) is a needleless sampling interface. The interface is a standard Luer male connector and a locking Luer connector, which is used to tighten the connection with the Luer female connector on the syringe.

6. The postoperative cardiac drainage fluid collection device according to claim 5, characterized in that, The liquid collection bottle (3) is made of hard transparent plastic and has a scale mark (34) engraved on it.

7. The postoperative cardiac drainage fluid collection device according to claim 6, characterized in that, The scale mark (34) is engraved on the inner wall of the liquid collection bottle (3). The scale mark (34) is a raised ridge line arranged circumferentially along the inner wall of the bottle. The raised ridge line is perpendicular to the axis of the bottle body, and two adjacent raised ridge lines form a scale unit.

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