Disposable abdominal drainage bag
Patent Information
- Application Number
- CN202521610161.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-31
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-07-31
AI Technical Summary
Existing peritoneal dialysis drainage bags lack markings indicating the insertion point of the drainage tube into the wound and have a limited variety of tube end designs, resulting in low practicality.
Design a disposable peritoneal dialysis drainage bag with graduations printed on the bag body and graduation lines on the drainage tube. The drainage tube has a cross-shaped or elliptical cross-section and is equipped with a stop clamp and quick connector to ensure that the insertion depth of the drainage tube is observable and to prevent blockage.
It improves the accuracy of drainage, prevents tube blockage, adapts to different drainage environments, facilitates bag replacement, and enhances safety and practicality.
Smart Images

Figure CN224925431U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a drainage bag, specifically a disposable peritoneal dialysis drainage bag, belonging to the field of medical consumables technology. Background Technology
[0002] Peritoneal dialysis drainage bags are specialized medical containers used in peritoneal dialysis (PD) to collect and temporarily store waste fluid (dialysis fluid) drained from the patient's peritoneal cavity. They are typically transparent plastic bags or rigid containers with a capacity of approximately 2 liters. They are connected to the peritoneal dialysis catheter. The transparent design allows medical staff or patients to observe the color, turbidity, and drainage volume of the drainage fluid, facilitating timely detection of abnormalities. After use, they must be sealed according to regulations and disposed of as medical waste to prevent contamination and infection risks. Currently, peritoneal dialysis drainage bags lack graduation markings, making it difficult to effectively determine the volume of drained fluid. The insertion point of the drainage tube into the wound is also unmarked, and the tube end design is limited, resulting in low practicality. Therefore, a disposable peritoneal dialysis drainage bag has been designed with graduations printed on the bag and the drainage tube, facilitating insertion into the lesion. The drainage tube end design is diversified to adapt to different drainage environments. Utility Model Content
[0003] The purpose of this invention is to provide a disposable peritoneal dialysis drainage bag to solve the above-mentioned problems, thereby addressing the issues of the lack of markings at the wound insertion point of the drainage tube and the limited variety of drainage tube end designs in the prior art.
[0004] This utility model is achieved through the following technical solution: a disposable peritoneal dialysis drainage bag, including a drainage bag body, which is made of PVC material film by high-frequency welding to form a sealed bag body.
[0005] A disposable peritoneal dialysis drainage bag includes a drainage bag body. An inlet tube is fixedly connected to the inner wall of the drainage bag body. The inlet tube is divided into two sections connected by a quick connector. A three-way shunt tube is fixedly connected to the outer surface of the inlet tube. The three-way shunt tube facilitates the drainage and discharge of fluid from the lesion. Drainage tube one and drainage tube two are fixedly connected to the two ends of the three-way shunt tube. Drainage tube two has graduations on its outer surface, allowing medical staff to visually observe the depth of insertion of drainage tube two into the patient's lesion. The inlet tube is closed with a stopcock, and the connector is connected to a syringe for flushing to prevent blockage.
[0006] Preferably, the outer surface of the drainage bag is provided with a fixing hole, which allows medical staff to more conveniently fix and hang the drainage bag. The outer surface of the drainage bag is provided with a scale, which allows medical staff to visually observe the amount of fluid drained from the patient's lesion.
[0007] Preferably, the outer surfaces of the first drainage tube, the second drainage tube, and the inlet tube are all fixedly connected with liquid-stopping clamps. Liquid-stopping clamps are common shut-off tools in the prior art, and this application will not elaborate on their size and working method.
[0008] The cross-section of the second drainage tube is designed in a cross shape or an ellipse shape. By adopting a cross-shaped or ellipse-shaped opening design for the cross-section of the second drainage tube, it is possible to effectively prevent the tube from being completely crushed and blocked when the lumen is under pressure, ensuring that drainage can remain unobstructed even under external pressure, making the device more adaptable to different drainage environments.
[0009] Preferably, a connector is inserted into one end of the drainage tube away from the three-way shunt tube, and a protective cap is fixedly connected to one end of the connector. By pulling the protective cap out of the connector, a syringe is connected for flushing to prevent tube blockage.
[0010] Preferably, the inlet pipe is divided into two sections connected by a quick connector, and a new drainage bag can be replaced when the drainage bag is full of liquid.
[0011] This utility model provides a disposable peritoneal dialysis drainage bag, which has the following beneficial effects:
[0012] This disposable peritoneal dialysis drainage bag features two graduations on the drainage tube, making it easy for medical staff to observe the insertion depth of the catheter. The cross-shaped and elliptical openings on the two sides of the drainage tube effectively prevent the tube from being completely crushed and blocked when pressure is applied, ensuring unobstructed drainage even under external pressure. This further makes the device more adaptable to different drainage environments. When the drainage bag is full, a new drainage bag can be replaced using a quick connector. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the two-section structure of the drainage tube of this utility model;
[0015] Figure 3 This is a three-dimensional structural diagram of the drainage tube with two graduation lines of this utility model.
[0016] [Explanation of Key Component Symbols]
[0017] 1. Drainage bag body; 2. Bag body scale; 3. Inlet tube; 4. Three-way diverter tube; 5. Drainage tube one; 6. Stop clamp; 7. Connector; 8. Protective cap; 9. Drainage tube two; 10. Drainage tube two scale line; 11. Fixing hanging hole; 12. Quick connector. Detailed Implementation
[0018] This utility model embodiment provides a disposable peritoneal dialysis drainage bag.
[0019] Please see Figure 1 The system includes a drainage bag 1, which is made of PVC material membrane using a high-frequency welding process to form a sealed bag. The use of PVC material offers several significant advantages. First, PVC itself possesses excellent chemical stability, effectively resisting the corrosive effects of components in peritoneal dialysis fluid, ensuring reliability and safety during long-term use. Second, it has high physical and mechanical strength, exhibiting good tensile and puncture resistance, making it less prone to breakage and leakage. Furthermore, PVC membranes typically have good transparency, allowing medical staff and patients to observe the properties and volume of the drainage fluid in real time. The membrane is sealed into a robust and reliable sealed bag using a precise high-frequency welding process. This process results in high fusion at the seams and a tight seal, greatly improving the overall durability of the bag and extending its service life.
[0020] The inner wall of the drainage bag 1 is fixedly connected to the inlet pipe 3, and the outer surface of the inlet pipe 3 is fixedly connected to the three-way diversion pipe 4. The three-way diversion pipe 4 facilitates the drainage and discharge of fluid from the lesion.
[0021] Please refer to it again. Figure 1 , Figure 2 and Figure 3 The two ends of the three-way diversion tube 4 are fixedly connected to the drainage tube 1 5 and the drainage tube 2 9. The outer surface of the drainage tube 2 9 is provided with the drainage tube 2 scale line 10. By setting the drainage tube 2 scale line 10, medical staff can intuitively observe the depth of the drainage tube 2 9 inserted into the patient's lesion, which not only significantly improves the accuracy of drainage, but also avoids the situation where the drainage tube 2 9 is accidentally inserted, causing the patient pain.
[0022] The outer surface of the drainage bag 1 is provided with a fixing hole 11, which allows medical staff to more conveniently fix and hang the drainage bag 1.
[0023] The outer surface of the drainage bag 1 is provided with a scale 2. The scale 2 allows medical staff to visually observe the amount of fluid drained from the patient's lesion, which facilitates the subsequent treatment of the fluid in the drainage bag 1 and enables timely further treatment of the patient.
[0024] The inlet pipe 3 is fixedly connected with a stop clamp 6, and the outer surfaces of the first drainage pipe 5 and the second drainage pipe 9 are both fixedly connected with stop clamps 6. The stop clamp 6 is a common shut-off tool in the prior art, and its size and working method will not be described in detail in this application.
[0025] Please refer to it again. Figure 1 , Figure 2 and Figure 3The cross-section of the drainage tube 29 is set in a cross shape or an ellipse shape. By adopting the cross-shaped or ellipse opening design of the drainage tube 29, it can effectively prevent the tube from being completely crushed and blocked when the lumen is under pressure, ensuring that the drainage can remain unobstructed even under external pressure, making it more adaptable to different drainage environments, and further making the device more practical.
[0026] The end of the drainage tube 5 furthest from the three-way shunt tube 4 is connected to a connector 7. One end of the connector 7 is fixedly connected to a protective cap 8. By removing the protective cap 8 from the connector 7, a syringe is connected for flushing to prevent tube blockage. By connecting the protective cap 8 to the connector 7, the sealing effect during the drainage of lesion fluid is significantly improved, effectively preventing bacterial invasion and infection.
[0027] The inlet tube 3 has a quick connector. When the drainage bag 1 is full, the quick connector can be unscrewed to replace the drainage bag.
[0028] The structural diagrams of the components shown in the attached figures are exemplary. The specific implementation should be adapted and optimized by considering the functional requirements, assembly conditions and process limitations in the actual application scenario, and adjusting the structural parameters, size specifications and connection methods accordingly.
[0029] Working principle: First, the drainage bag 1 is made of PVC film using high-frequency welding to form a sealed bag. The outer surface of the drainage bag 1 is printed with markings 2 for easy observation of the drainage fluid volume. A fixing hole 11 is also provided on the outer surface of the drainage bag 1 for easy fixation by medical staff. A quick connector connects the drainage bag 1 and the inlet tube 3, facilitating replacement with a new drainage bag 1 after it is full. During use, the drainage tube 2 9 is inserted into the lesion. The depth of insertion of the drainage tube 2 9 into the lesion is easily observed by medical staff through the markings 10 on its surface. During the insertion of the drainage tube 2 9 into the lesion, a stop-fluid clamp 6 is present on its surface. The drainage tube 5 is in the open state, while the stop clamp 6 on its surface is in the closed state, facilitating the drainage of fluid from the lesion into the drainage bag 1. When there is too much fluid in the drainage bag 1 and it needs to be drained, the stop clamp 6 on the surface of the drainage tube 9 is closed, while the stop clamp 6 on the surface of the drainage tube 5 is opened, and the cap 8 is pulled out from the connector 7. The tube can also be flushed from the connector 7 to prevent blockage. Furthermore, the drainage tube 9 adopts a cross-shaped and elliptical opening design, which can effectively prevent the tube from being completely crushed and blocked when the lumen is under pressure, ensuring that drainage remains unobstructed even under external pressure, making it more adaptable to different drainage environments and further enhancing the practical value of this device.
[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A disposable peritoneal dialysis drainage bag, comprising a drainage bag body (1), characterized in that: The inner wall of the drainage bag (1) is fixedly connected to an inlet pipe (3), which is divided into two sections and connected by a quick connector (12). The outer surface of the inlet pipe (3) is fixedly connected to a three-way diverter pipe (4), and the two ends of the three-way diverter pipe (4) are fixedly connected to a first drain pipe (5) and a second drain pipe (9). The outer surface of the second drain pipe (9) is provided with a second drain pipe scale line (10).
2. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: The outer surface of the drainage bag (1) is provided with a fixing hanging hole (11), and the outer surface of the drainage bag (1) is provided with a bag scale (2).
3. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: The outer surfaces of the first drainage tube (5), the second drainage tube (9) and the inlet tube (3) are all fixedly connected with liquid stop clamps (6), and the cross section of the second drainage tube (9) is set in a cross shape or an ellipse shape.
4. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: The end of the drainage tube (5) away from the three-way diversion tube (4) is connected to a connector (7), and a protective cap (8) is fixedly connected to one end of the connector (7).
5. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: There are quick connectors connecting the inlet pipes (3).
6. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: Connector (7) to insert the pipe connector for waste liquid drainage.
7. The disposable peritoneal dialysis drainage bag according to claim 1, characterized in that: After the second drainage tube (9) is inserted into the human body, the connector (7) can be connected to a syringe to flush the tubing and prevent blockage.
