Drainage bag capable of quantitatively collecting liquid specimen
By incorporating a liquid inlet tube, a quantitative adjustment tube, and a closed float into the drainage bag, the problem of quantitative collection and specimen retention of the drainage bag is solved, enabling automatic control and convenient urine testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANDAN IRON & STEEL GROUP CO LTD
- Filing Date
- 2025-02-05
- Publication Date
- 2026-05-05
AI Technical Summary
Existing drainage bags are difficult to use for quantitative collection and automatic stopping in urine tests, and they are prone to contamination and wasted manpower when collecting urine samples.
A drainage bag was designed, comprising a liquid inlet tube, a quantitative adjustment tube, a hollow piston, and a closed float. The quantitative adjustment tube and the closed float work together to automatically stop liquid collection. The bag is connected to the specimen collection instrument via a three-way valve for easy urine testing.
It enables quantitative collection and automatic stopping of drainage bags, reducing manpower waste, avoiding excessive drainage and specimen contamination, and providing convenient conditions for urine testing.
Smart Images
Figure CN224193825U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a drainage bag that can collect liquid samples according to a pre-set liquid volume, belonging to the field of medical device technology. Background Technology
[0002] A drainage bag is a transparent plastic bag used to collect and drain fluids, such as blood or fluid accumulation, from the inside of the body or deep within a surgical site after surgery. Drainage bags are mainly used to collect urine in patients with urinary incontinence, patients in a coma after surgery, and those with limited mobility, or in conjunction with other instruments to collect wound drainage fluid.
[0003] When catheterizing a patient with urinary retention using a drainage bag, the initial drainage should not exceed 1000ml. For patients with severely distended bladders, the initial drainage should be less than 500ml. This is because excessive urine drainage can cause a sudden drop in bladder pressure, leading to bladder distension and bleeding. Additionally, large amounts of urine drainage can cause a sudden decrease in intra-abdominal pressure, making it easier for blood to pool in the abdominal cavity and potentially inducing hypotension. Therefore, after catheterization, nurses must wait and observe the urine drainage, wasting time and manpower, and even slight negligence can easily result in excessive drainage.
[0004] In addition, urine tests are of great value in clinical diagnosis, assessing treatment efficacy, and predicting prognosis. The requirements and processing of urine samples vary depending on the specific urine test. For patients, morning urine must be collected as midstream urine. This is to avoid the influence of initial and terminal urine on the test results. If all urine samples are collected in the drainage bag, it is difficult to distinguish them and easily leads to secondary contamination. Traditionally, the method for collecting urine samples involves disconnecting the drainage bag from the drainage tube and directly using the urine sample tube. Due to the small diameter of the test tube, it is difficult to accurately connect the tube, leading to secondary contamination. Furthermore, urine may spill during the collection process, soiling hands and increasing the difficulty of collecting urine.
[0005] Therefore, it is necessary to modify ordinary drainage bags and design a drainage bag that can quantitatively collect and automatically stop drainage while facilitating specimen collection. Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a drainage bag that can quantitatively collect liquid specimens. This drainage bag can be preset with a drainage volume. When the drainage fluid reaches the set volume, it will automatically stop collecting the fluid, which reduces the nurse's workload of constantly monitoring the drainage volume, avoids the risk of excessive drainage, and provides convenience for extracting test specimens.
[0007] The technical solution to the above technical problem is:
[0008] A drainage bag for quantitatively collecting liquid samples includes a drainage bag and a drainage tube connected to the upper end of the drainage bag. The lower end of the drainage bag has a drain tube and a check valve. The improvement lies in that it also includes a liquid inlet cylinder, a quantitative adjustment tube, a hollow piston, and a sealed float. The liquid inlet cylinder is a transparent cylinder placed inside the drainage bag. Its upper end connects to the outer periphery of the inlet hole of the drainage bag, and its lower end is closed. Small connecting holes are evenly distributed on the bottom surface of the liquid inlet cylinder. The outer wall of the liquid inlet cylinder has positioning graduations that correspond to the graduations on the drainage bag. The metering adjustment tube is a transparent plastic thin tube. The lower part of the metering adjustment tube is placed in the liquid inlet tube. The diameter of the metering adjustment tube matches the diameter of the liquid inlet hole at the upper end of the drainage bag. The upper part of the metering adjustment tube extends from the liquid inlet hole at the upper end of the drainage bag and connects to the lower end of the drainage hose. A hollow piston is installed at the lower end of the metering adjustment tube. The hollow piston has a central through hole that connects to the inner hole of the metering adjustment tube. The outer wall of the hollow piston and the inner wall of the liquid inlet tube have a tight sliding fit. A closed float is placed on the bottom surface of the liquid inlet tube below the hollow piston. The diameter of the closed float is larger than the diameter of the central through hole of the hollow piston.
[0009] The aforementioned drainage bag, capable of quantitatively collecting liquid samples, also includes a pull-up folding tube located above the drainage bag. The pull-up folding tube is fitted over the quantitative adjustment tube extending out of the drainage bag. The lower end of the pull-up folding tube is connected to the outer periphery of the inlet hole of the drainage bag. The upper end of the pull-up folding tube is sealed by a disc with a connecting hole in the center. The connecting hole matches the outer diameter of the quantitative adjustment tube. The upper end of the quantitative adjustment tube extends out of the central connecting hole of the disc, and the outer wall of the upper end of the quantitative adjustment tube is fixedly bonded to the central connecting hole of the disc.
[0010] The above-mentioned drainage bag, which can quantitatively collect liquid samples, has a connecting ring outside the liquid inlet of the drainage bag. The outer edge of the connecting ring is sealed and bonded to the periphery of the liquid inlet at the upper end of the drainage bag. The upper end of the liquid inlet tube is connected to the lower end face of the connecting ring outside the liquid inlet of the drainage bag. The lower end of the pull-up folding tube is connected to the upper end face of the connecting ring outside the liquid inlet of the drainage bag.
[0011] The aforementioned drainage bag, which can quantitatively collect liquid samples, has a three-way valve installed on the drainage tubing connected to the drainage bag, and quick connectors are installed on the drainage tubing at both ends of the three-way valve.
[0012] The beneficial effects of this utility model are:
[0013] This invention features a quantitative adjustment pull tube that introduces liquid from the drainage tube into a liquid inlet cylinder, which then enters the drainage bag through a small connecting hole on the bottom surface of the liquid inlet cylinder. The pull-up folding tube is telescopic; pulling the upper disc of the folding tube raises or lowers the quantitative adjustment pull tube, adjusting the height of the hollow piston at the lower end of the pull tube within the liquid inlet cylinder, thus presetting the volume of the collected liquid sample. The liquid surfaces in the drainage bag and the liquid in the liquid inlet cylinder are flush. The liquid in the liquid inlet cylinder can float a sealed float. When the liquid level reaches the preset height, the sealed float blocks the central through-hole of the hollow piston, preventing further liquid flow into the drainage bag through the quantitative adjustment pull tube, thereby automatically controlling the volume of the liquid sample collected by the drainage bag. The three-way valve in the drainage tube can be connected to other sample collection instruments for convenient sampling and inspection of the drainage fluid.
[0014] This utility model has a simple structure, is easy to use and manufacture, can be sampled at any time, is simple to operate, has significant practical value, will not cause contamination of the sampled specimen, and will not allow drainage fluid to flow onto the hands of the sampling personnel, thus avoiding the waste of manpower caused by nurses constantly monitoring. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] The following are the markings in the diagram: 1. Drainage bag; 2. Drainage hose; 3. Drainage pipe; 4. Stop valve; 5. Liquid inlet tube; 6. Quantitative adjustment pull tube; 7. Hollow piston; 8. Sealed float; 9. Lifting folding tube; 10. Liquid inlet hole; 11. Connecting hole; 12. Central through hole; 13. Connecting ring; 14. Disc; 15. Positioning scale; 16. Drainage bag scale; 17. Quick connector; 18. Three-way valve; 19. Drainage bag strap. Detailed Implementation
[0017] This utility model consists of a drainage bag 1, a drainage hose 2, a drain pipe 3, a stop valve 4, a liquid inlet cylinder 5, a quantitative adjustment pull tube 6, a hollow piston 7, a closed float 8, a lifting folding tube 9, a quick connector 17, and a three-way valve 18.
[0018] As shown in the figure, this utility model includes a general drainage bag 1, a drainage hose 2, a drain pipe 3, and a stop valve 4. The drainage hose 2 is connected to the upper end of the drainage bag 1. The lower end of the drainage bag 1 has a drain pipe 3 and a stop valve 4. The upper end of the drainage bag 1 also has a drainage bag strap 19.
[0019] As shown in the figure, the liquid inlet tube 5 is a transparent cylinder placed inside the drainage bag 1. The upper end of the liquid inlet tube 5 is connected to the outer periphery of the liquid inlet hole 10 of the drainage bag 1, and the lower end of the liquid inlet tube 5 is closed. Small connecting holes 11 are evenly distributed on the bottom surface of the liquid inlet tube 5, allowing liquid entering the liquid inlet tube 5 to drain into the drainage bag 1 through the connecting holes 11. The outer wall of the liquid inlet tube 5 has positioning scales 15, which are flush with the drainage bag scales 16 of the drainage bag 1. By setting the positioning scales 15 on the outer wall of the liquid inlet tube 5, the liquid in the drainage bag 1 can reach a predetermined volume.
[0020] As shown in the figure, there is a connecting ring 13 on the outer periphery of the liquid inlet hole 10 of the drainage bag 1. The outer edge of the connecting ring 13 is sealed and bonded to the periphery of the liquid inlet hole 10 at the upper end of the drainage bag 1. The upper end of the liquid inlet cylinder 5 is connected to the lower end face of the connecting ring 13 outside the liquid inlet hole 10 of the drainage bag 1.
[0021] As shown in the figure, the quantitative adjustment tube 6 is a transparent plastic thin tube. The lower part of the quantitative adjustment tube 6 is placed in the liquid inlet tube 5. The diameter of the quantitative adjustment tube 6 matches the diameter of the liquid inlet hole 10 at the upper end of the drainage bag 1. The upper part of the quantitative adjustment tube 6 extends from the liquid inlet hole 10 at the upper end of the drainage bag 1 and connects to the lower end of the drainage hose 2. Liquid can flow from the drainage hose 2 into the liquid inlet tube 5 through the quantitative adjustment tube 6.
[0022] As shown in the diagram, a hollow piston 7 is installed at the lower end of the metering adjustment tube 6. The hollow piston 7 has a central through hole 12 that connects to the inner hole of the metering adjustment tube 6. The outer wall of the hollow piston 7 and the inner wall of the liquid inlet cylinder 5 are in tight sliding fit. A sealing float 8 is placed on the bottom surface of the liquid inlet cylinder 5 below the hollow piston 7. The diameter of the sealing float 8 is larger than the diameter of the central through hole 12 of the hollow piston 7. In use, liquid flows into the liquid inlet cylinder 5 through the central through hole 12 of the hollow piston 7. When the liquid reaches a preset height, the liquid will lift the sealing float 8, which will then seal the central through hole 12 of the hollow piston 7. The hollow piston 7 will then completely seal the liquid inlet cylinder 5, stopping the liquid from flowing into the drainage bag 1 through the liquid inlet cylinder 5.
[0023] As shown in the diagram, the pull-up folding tube 9 is located above the drainage bag 1. The pull-up folding tube 9 is fitted over the metering adjustment tube 6 extending from the drainage bag 1. The lower end of the pull-up folding tube 9 is connected to the upper end face of the connecting ring 13 outside the liquid inlet 10 of the drainage bag 1. The upper end of the pull-up folding tube 9 is sealed by a disc 14, with a connecting hole at its center. The connecting hole matches the outer diameter of the metering adjustment tube 6. The upper end of the metering adjustment tube 6 extends beyond the central connecting hole of the disc 14, and the upper outer wall of the metering adjustment tube 6 is fixedly bonded to the central connecting hole of the disc 13. In use, pulling the pull-up folding tube 9 upwards or downwards will raise or lower the metering adjustment tube 6, changing the position of the hollow piston 7 at the lower end of the metering adjustment tube 6, thereby achieving the purpose of presetting the liquid level in the liquid inlet cylinder 5 and the drainage bag 1.
[0024] As shown in the diagram, the upper end of the drainage tube 2 has a quick connector 17. A three-way valve 18 is screwed onto the quick connector 17. By screwing the three-way valve 18, the upper and lower ports of the three-way valve 18 can be adjusted to be open, and the left port closed, thus setting the drainage fluid to flow into the drainage bag 1. Then, the left end of the three-way valve 18 is screwed onto the interface of other specimen collection instruments. By screwing the three-way valve 18, the upper and left ports of the three-way valve 18 can be adjusted to be open, and the lower port closed, thus setting the drainage fluid to flow into other specimen collection instruments.
[0025] The usage process of this utility model is as follows:
[0026] This utility model is suspended on the patient's bed by the hanging drainage bag soft strap 19. By pushing down or pulling up the folding tube 9, the position of the quantitative adjustment tube 6 and the hollow piston 7 is adjusted to set the drainage volume of the drainage bag 1. The drainage tube 2 is inserted into the part of the patient's body that needs drainage. By turning the three-way valve 18, it is adjusted so that the upper and lower ports of the three-way valve 18 are open and the left port is closed. In this way, the drainage fluid can enter the liquid inlet cylinder 5 through the drainage tube soft strap 2, the three-way valve 18, the quantitative adjustment tube 6, and the hollow piston 7, and then flow into the drainage bag 1 from the connecting hole 11 at the bottom of the liquid inlet cylinder 5. When it is necessary to drain the drainage fluid in the drainage bag 1, the stop valve 4 at the bottom of the drainage bag 1 can be removed to drain it.
[0027] When it is necessary to collect a drainage fluid sample, first screw the left end of the three-way valve 18 onto the interface of another specimen collection instrument. By screwing the three-way valve 18, adjust it so that the upper and left ports of the three-way valve 18 are open and the lower port is closed, so that the drainage fluid can flow into the other specimen collection instrument.
[0028] After the specimen collection is completed, turn the three-way valve 18 to adjust it so that the upper and lower ports of the three-way valve 18 are open and the left port is closed. This will allow the drainage fluid to continue flowing into the drainage bag 1. Then, the specimen collection instrument can be removed.
[0029] An embodiment of this utility model is as follows:
[0030] The drainage bag 1 has a volume of 1000ml, a length of 258mm, and a width of 160mm;
[0031] The drainage tube 2 has a diameter of 7mm and a quick connector at the top.
[0032] The liquid inlet cylinder 5 has an outer diameter of 18 mm, an inner diameter of 16 mm, a length of 162 mm, and 12 small connecting holes 11 at the bottom with a diameter of 2 mm.
[0033] The quantitative regulating tube 6 has a diameter of 8mm, a thickness of 1mm, and a length of 214.5mm;
[0034] The hollow piston 7 has a transverse extrusion thickness of 4mm, a minimum longitudinal thickness of 5mm, a maximum longitudinal thickness of 10mm, an outer diameter of 16mm, and a central through hole 12 with a diameter of 8mm.
[0035] The diameter of the enclosed float 8 is 12mm;
[0036] The compression diameter of the lifting folding tube 9 is 26mm, and it can be compressed to a minimum of less than 72mm and stretched to a maximum of more than 201.5mm.
Claims
1. A drainage bag for quantitatively collecting liquid specimens, comprising a drainage bag (1) and a drainage tube (2), the drainage tube (2) being connected to the upper end of the drainage bag (1), and a drain tube (3) and a check valve (4) at the lower end of the drainage bag (1), characterized in that: It also includes a liquid inlet tube (5), a metering adjustment tube (6), a hollow piston (7), and a closed float (8). The liquid inlet tube (5) is a transparent cylinder. The liquid inlet tube (5) is placed in the drainage bag (1). The upper end of the liquid inlet tube (5) is connected to the outer periphery of the liquid inlet hole (10) of the drainage bag (1). The lower end of the liquid inlet tube (5) is closed. Small connecting holes (11) are evenly distributed on the bottom surface of the liquid inlet tube (5). There are positioning scales (15) on the outer wall of the liquid inlet tube (5). The positioning scales (15) on the outer wall of the liquid inlet tube (5) are flush with the drainage bag scales (16) of the drainage bag (1). The metering adjustment tube (6) is a transparent plastic thin tube. The lower part of the metering adjustment tube (6) is placed in the liquid inlet tube. In the liquid inlet tube (5), the diameter of the quantitative adjustment tube (6) matches the diameter of the liquid inlet hole (10) at the upper end of the drainage bag (1). The upper part of the quantitative adjustment tube (6) extends from the liquid inlet hole (10) at the upper end of the drainage bag (1) and connects to the lower end of the drainage hose (2). A hollow piston (7) is installed at the lower end of the quantitative adjustment tube (6). The hollow piston (7) has a central through hole (12) that is connected to the inner hole of the quantitative adjustment tube (6). The outer wall of the hollow piston (7) and the inner wall of the liquid inlet tube (5) are in tight sliding fit. The closed float (8) is placed on the bottom surface of the liquid inlet tube (5) below the hollow piston (7). The diameter of the closed float (8) is larger than the diameter of the central through hole (12) of the hollow piston (7).
2. The drainage bag for quantitatively collecting liquid specimens according to claim 1, characterized in that: It also has a pull-up folding tube (9), which is located above the drainage bag (1). The pull-up folding tube (9) is sleeved on the outside of the quantitative adjustment tube (6) that extends out of the drainage bag (1). The lower end of the pull-up folding tube (9) is connected to the outer periphery of the inlet hole (10) of the drainage bag (1). The upper end of the pull-up folding tube (9) is closed by a disc (14). The center of the disc (14) has a connecting hole that matches the outer diameter of the quantitative adjustment tube (6). The upper end of the quantitative adjustment tube (6) extends out of the central connecting hole of the disc (14). The upper outer wall of the quantitative adjustment tube (6) is fixedly bonded to the central connecting hole of the disc (14).
3. The drainage bag for quantitatively collecting liquid specimens according to claim 2, characterized in that: The drainage bag (1) has a connecting ring (13) outside the liquid inlet (10). The outer edge of the connecting ring (13) is sealed and bonded to the periphery of the liquid inlet (10) at the upper end of the drainage bag (1). The upper end of the liquid inlet tube (5) is connected to the lower end face of the connecting ring (13) outside the liquid inlet (10) of the drainage bag (1). The lower end of the lifting folding tube (9) is connected to the upper end face of the connecting ring (13) outside the liquid inlet (10) of the drainage bag (1).
4. The drainage bag for quantitatively collecting liquid specimens according to claim 1, characterized in that: A three-way valve (18) is installed on the drainage hose (2) connected to the drainage bag (1), and quick connectors (17) are installed on the drainage hoses (2) at both ends of the three-way valve (18).