Collapsible drainage bag
By designing a retractable drainage bag, the problem of fixed drainage tube length was solved, achieving both stability and convenience of the drainage bag, and reducing secondary injury while ensuring patient mobility.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE SECOND AFFILIATED HOSPITAL OF ANHUI MEDICAL UNIV
- Filing Date
- 2025-03-05
- Publication Date
- 2026-07-14
AI Technical Summary
The fixed length of the drainage tube in existing drainage bags leads to unstable drainage, restricts the patient's range of motion, and may cause secondary harm to the patient.
A retractable drainage bag was designed, comprising a multi-segment guide tube, a plug assembly, and a bag assembly. Through the insertion and threaded connection between the plug tube and the guide tube, combined with the design of the telescopic tube and the hanging lugs, the expansion and contraction of the tube can be adjusted to ensure the stability and convenience of drainage.
It improves the ease of use and stability of the drainage bag, reduces restrictions on patient activity, lowers the risk of secondary injury, and enhances the stability and flexibility of the structure.
Smart Images

Figure CN224484577U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage bag technology, specifically to a retractable drainage bag. Background Technology
[0002] A drainage bag is a medical device used to collect fluids drained from the body. It is commonly used post-operatively or under specific medical conditions to help patients drain accumulated fluid, blood, or other bodily fluids, promoting wound healing and reducing the risk of infection. The importance of drainage bags is particularly pronounced for patients with indwelling catheters. Indwelling catheters are typically placed for continuous treatment (such as antibiotic infusions, nutritional support, etc.) or monitoring (such as central venous pressure monitoring). In these cases, drainage bags effectively collect blood, exudate, or drug residues drained through the catheter, preventing direct contact with the skin and reducing the chance of skin irritation and infection. Furthermore, drainage bags allow healthcare professionals to promptly observe whether the catheter is blocked or displaced, ensuring the continuity and effectiveness of treatment. Therefore, in cases requiring long-term indwelling catheters, the correct use of drainage bags is one of the important measures to ensure patient safety and treatment effectiveness.
[0003] Current drainage bags mainly use a reservoir bag connected to a drainage tube. The drainage tube connects to a pre-installed needle in the patient's body, and the fluid is introduced into the reservoir bag through the drainage tube. Although this type of drainage bag has a simple structure, the length of the drainage tube is fixed, making it difficult to ensure the stability of the drainage. It also restricts the patient's range of motion, making it easy for the patient to pull on the drainage tube, thus causing secondary damage to the patient's body.
[0004] In summary, a safe and stable drainage bag is currently needed. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a retractable drainage bag, which solves the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A retractable drainage bag includes a guide tube, a telescopic plugging assembly inserted into the top of the guide tube, a bagging assembly connected to the top of the plugging assembly, a sealing cap connected to the top surface of the bagging assembly, a receiving tube connected to the bottom of the guide tube, an external threaded cylinder connected through the bottom of the guide tube, an internal threaded cylinder connected through the top of the receiving tube, the internal threaded cylinder being threadedly sleeved on the outer wall of the external threaded cylinder, and the bagging assembly, plugging assembly, guide tube, and receiving tube being internally connected.
[0008] The plugging assembly includes a first conduit, a telescopic tube, a second conduit, and a plug. The first conduit is connected to the bottom surface of the bagging assembly. The bottom end of the first conduit is connected to the telescopic tube. The bottom end of the telescopic tube is connected to the second conduit. The bottom end of the second conduit is connected to the plug. The bottom end of the plug is inserted into the inside of the conduit.
[0009] Furthermore, the plugging assembly also includes ear tabs, which are fixed to the outer wall of the first conduit. There are two ear tabs fixed in mirror image about the vertical center line of the first conduit, and the top surfaces of the two ear tabs are fixed to the bottom surface of the bagging assembly.
[0010] Furthermore, the plugging assembly also includes a hooking component, which is sleeved on the outer wall of the second conduit, and the top side of the hooking component is inserted into the inside of the lug.
[0011] Furthermore, the hanging component includes a pressure block, a locking post, a pull bar, and a fixing ring. The fixing ring is sleeved on the outer wall of the second conduit. Two pull bars are connected to the top surface of the fixing ring. The end of the pull bar away from the fixing ring is connected to the pressure block. A locking post is fixed on one side of the pressure block. Multiple insertion holes are opened inside the hanging ear piece. The locking post is inserted into the insertion hole. The end of the locking post away from the pressure block has a conical structure.
[0012] Furthermore, the bag assembly includes a liquid outlet pipe, an upper bag body, a telescopic bag, and a lower bag body. The liquid outlet pipe is connected through to the top surface of the upper bag body, and a sealing cap is fitted onto the outer wall of the liquid outlet pipe. The telescopic bag is connected through to the bottom surface of the upper bag body, and the lower bag body is connected through to the bottom surface of the telescopic bag.
[0013] Furthermore, a side push ring is sleeved on the top of the guide cylinder, and a locking block is fixed on the top surface of the side push ring. There are two locking blocks mirrored about the vertical center line of the side push ring. A locking protrusion ring is sleeved on the outer wall of the plug cylinder. The locking protrusion ring is a circular ring structure that is narrow at the top and wide at the bottom. The two locking blocks cooperate to lock tightly against the outer wall of the locking protrusion ring.
[0014] Furthermore, a first rotary push ring is sleeved on the outer wall of the top end of the connector tube, and a second rotary push ring is sleeved on the outer wall of the end of the connector tube away from the first rotary push ring. One end of the second rotary push ring is connected to an installation cylinder, and the inner wall of the installation cylinder is provided with internal threads.
[0015] This utility model provides a retractable drainage bag. Compared with the prior art, it has the following advantages:
[0016] Beneficial effects:
[0017] 1. By designing the drainage bag into a multi-segment structure, it is easy to carry and package. When in use, the plug is inserted into the guide tube, and the inlet tube is threaded to the bottom of the guide tube. This assembly and connection operation is simple and improves the convenience of using the drainage bag.
[0018] 2. When inserting the stopper into the guide tube, a telescopic tube is used to connect the stopper and the bag assembly, so that the length can be adjusted by extension and retraction. This reduces the space occupied when storing, and the tube length can be adjusted by extension during use to ensure the stability of drainage. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the retractable drainage bag structure of this utility model is shown;
[0021] Figure 2 An exploded view of the overall structure of this utility model is shown;
[0022] Figure 3 A schematic diagram of the connection structure between the plugging assembly and the bagging assembly of this utility model is shown;
[0023] Figure 4 A schematic diagram of the plug assembly structure of this utility model is shown;
[0024] Figure 5 A schematic diagram of the guide tube structure of this utility model is shown;
[0025] Figure 6 A schematic diagram of the connector structure of this utility model is shown;
[0026] The diagram shows: 1. Guide tube; 11. Side push ring; 12. Locking block; 13. External threaded cylinder; 2. Plug assembly; 21. Hanging ear; 211. Insertion hole; 22. First guide tube; 23. Telescopic tube; 24. Second guide tube; 25. Plug cylinder; 251. Locking protrusion ring; 26. Hanging component; 261. Pressure block; 262. Locking post; 263. Pull strip; 264. Fixing ring; 3. Bag assembly; 31. Discharge tube; 32. Upper bag body; 33. Telescopic bag; 34. Lower bag body; 4. Sealing cap; 5. Connecting tube; 51. First rotary push ring; 52. Internal threaded cylinder; 53. Second rotary push ring; 54. Mounting cylinder. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0028] Example 1
[0029] To address the technical problems in the background section, the following retractable drainage bag is provided:
[0030] Combination Figures 1-6 As shown, the retractable drainage bag provided by this utility model includes a guide tube 1, a telescopic plugging assembly 2 is inserted into the top of the guide tube 1, a bagging assembly 3 is connected to the top of the plugging assembly 2, a sealing cap 4 is connected to the top surface of the bagging assembly 3, a receiving tube 5 is connected to the bottom of the guide tube 1, an external threaded cylinder 13 is connected through the bottom of the guide tube 1, an internal threaded cylinder 52 is connected through the top of the receiving tube 5, and the internal threaded cylinder 52 is threadedly sleeved on the outer wall of the external threaded cylinder 13. The bagging assembly 3, the plugging assembly 2, the guide tube 1 and the receiving tube 5 are internally connected.
[0031] The plugging assembly 2 includes a first conduit 22, a telescopic tube 23, a second conduit 24, and a plug cylinder 25. The first conduit 22 is connected to the bottom surface of the bagging assembly 3. The bottom end of the first conduit 22 is connected to the telescopic tube 23. The bottom end of the telescopic tube 23 is connected to the second conduit 24. The bottom end of the second conduit 24 is connected to the plug cylinder 25. The bottom end of the plug cylinder 25 is inserted into the inside of the guide tube 1.
[0032] The above structure achieves the following effect:
[0033] 1. By setting the drainage bag to a multi-segment structure, it is easy to carry and package. When in use, the plug tube 25 is inserted into the guide tube 1, and the connecting tube 5 is threaded to the bottom end of the guide tube 1. This assembly and connection operation is simple and improves the convenience of using the drainage bag.
[0034] 2. When the stopper 25 is inserted into the guide tube 1, a telescopic tube 23 is used to connect the stopper 25 and the bag assembly 3, so that the length can be adjusted by extension and retraction. This reduces the space occupied when storing, and the length of the tube can be adjusted by extension during use to ensure the stability of drainage.
[0035] In this embodiment, the plugging assembly 2 further includes a hanging ear piece 21, which is fixed to the outer wall of the first conduit 22. There are two hanging ear pieces 21 fixed in mirror image about the vertical center line of the first conduit 22, and the top surfaces of the two hanging ear pieces 21 are fixed to the bottom surface of the bagging assembly 3.
[0036] By setting the ear tab 21, the connection strength between the first conduit 22 and the bag assembly 3 is strengthened, and the first conduit 22 is prevented from bending and being damaged, thus improving the stability of the structure.
[0037] In this embodiment, the plugging assembly 2 further includes a hooking component 26, which is sleeved on the outer wall of the second conduit 24, and the top side of the hooking component 26 is inserted into the inside of the lug 21.
[0038] When the telescopic tube 23 is retracted, the extension and retraction of the telescopic tube 23 can be restricted by simply inserting the hanging component 26 into the hanging ear piece 21, thus ensuring the stability of the telescopic tube 23 when it is stored.
[0039] In this embodiment, the hanging component 26 includes a pressure block 261, a locking post 262, a pull bar 263, and a fixing ring 264. The fixing ring 264 is sleeved on the outer wall of the second conduit 24. Two pull bars 263 are connected to the top surface of the fixing ring 264. The end of the pull bar 263 away from the fixing ring 264 is connected to the pressure block 261. The locking post 262 is fixed on one side of the pressure block 261. Multiple insertion holes 211 are opened inside the hanging ear piece 21. The locking post 262 is inserted into the insertion hole 211. The end of the locking post 262 away from the pressure block 261 has a conical structure.
[0040] The fixing ring 264 is tightened by the pull bar 263, and the locking pin 262 on the pressure block 261 is inserted into the socket 211 for positioning, so that the length of the telescopic tube 23 is limited and the positioning operation is simple.
[0041] Example 2
[0042] like Figures 1-6 As shown, based on the above embodiments, this embodiment further provides the following:
[0043] The bag assembly 3 includes a liquid outlet pipe 31, an upper bag body 32, a telescopic bag 33, and a lower bag body 34. The liquid outlet pipe 31 is connected through the top surface of the upper bag body 32, and a sealing cap 4 is sleeved on the outer wall of the liquid outlet pipe 31. The telescopic bag 33 is connected through the bottom surface of the upper bag body 32, and the lower bag body 34 is connected through the bottom surface of the telescopic bag 33.
[0044] By setting up the upper bag body 32, the telescopic bag 33 and the lower bag body 34 structure, not only is the stability of the top and bottom connection structure guaranteed, but the telescopic bag 33 can also be extended and retracted in the middle to adjust the size of the drainage bag, reducing the space occupied during storage, increasing the storage space during use, and improving the flexibility and convenience of use.
[0045] In this embodiment, a side push ring 11 is sleeved on the top of the guide cylinder 1, and a locking block 12 is fixed on the top surface of the side push ring 11. Two locking blocks 12 are arranged in a mirror image about the vertical center line of the side push ring 11. A locking protrusion ring 251 is sleeved on the outer wall of the plug cylinder 25. The locking protrusion ring 251 is a circular ring structure that is narrow at the top and wide at the bottom. The two locking blocks 12 cooperate to lock tightly on the outer wall of the locking protrusion ring 251.
[0046] After the plug is inserted into the guide tube 1, two locking blocks 12 are used to lock it onto the locking ring 251, thereby locking and positioning the plug tube 25 onto the guide tube 1, which further ensures the stability of the plug tube 25 connection.
[0047] In this embodiment, a first rotary push ring 51 is sleeved on the outer wall of the top end of the connecting pipe 5, and a second rotary push ring 53 is sleeved on the outer wall of the end of the connecting pipe 5 away from the first rotary push ring 51. One end of the second rotary push ring 53 is connected to an installation cylinder 54, and the inner wall of the installation cylinder 54 is provided with internal threads.
[0048] By employing the first rotary ring 51 and the second rotary ring 53, it is convenient to connect the guide tube 5 to the pre-reserved needle tube and the external threaded cylinder 13 on the human body.
[0049] Working principle and usage process of this utility model:
[0050] First press Figures 1-6 Insert the plug 25 into the guide tube 1 so that the two locking blocks 12 are locked onto the locking protrusion ring 251. Then, rotate and push the first rotating ring 51 on the connecting tube 5 to thread the inner threaded tube 52 onto the outer threaded tube 13 on the guide tube 1. Then, remove the two pressure blocks 261 and pull the locking pin 262 out from the insertion hole 211 on the hanging ear plate 21 to release the restriction of the pull strip 263 on the fixing ring 264. Then, the telescopic tube 23 can be stretched.
[0051] Then move the connecting tube 5 to the position of the pre-reserved needle on the patient's body, rotate and push the second rotating ring 53 to connect the mounting tube 54 with the pre-reserved needle, and connect the connecting tube 5 with the pre-reserved needle. Then introduce the solution from the connecting tube 5 into the guide tube 1. At this time, the color, concentration and turbidity of the solution can be observed and recorded inside the guide tube 1 for later detection and analysis.
[0052] The solution is introduced into the bag assembly 3 through the telescopic tube 23. The telescopic tube 23 utilizes its telescopic properties to allow the patient to move within a wide range without feeling pulled, thus improving the stability and safety of the drainage. In cases of a large amount of solution, the telescopic bag 33 can be stretched to increase the storage volume and generate negative pressure, which can promote the flow of solution into the bag assembly 3. Finally, the sealing cap 4 is opened to discharge the solution collected inside from the outlet tube 31.
[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0054] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A retractable drainage bag, characterized in that: Includes a guide tube (1), the top end of which is inserted with a telescopic plugging assembly (2), the top end of which is connected to a bagging assembly (3), the top surface of which is connected to a sealing cap (4), the bottom end of which is connected to a connecting pipe (5), the bottom end of which is connected to an external threaded cylinder (13), the top end of which is connected to an internal threaded cylinder (52), the internal threaded cylinder (52) being threaded onto the outer wall of the external threaded cylinder (13), and the bagging assembly (3), the plugging assembly (2), the guide tube (1), and the connecting pipe (5) being internally connected to each other; The plugging assembly (2) includes a first conduit (22), a telescopic tube (23), a second conduit (24), and a plug (25). The first conduit (22) is connected to the bottom surface of the bagging assembly (3). The bottom end of the first conduit (22) is connected to the telescopic tube (23). The bottom end of the telescopic tube (23) is connected to the second conduit (24). The bottom end of the second conduit (24) is connected to the plug (25). The bottom end of the plug (25) is inserted into the inside of the guide tube (1).
2. The retractable drainage bag according to claim 1, characterized in that: The plug assembly (2) also includes ear tabs (21), which are fixed to the outer wall of the first conduit (22). There are two ear tabs (21) fixed in mirror image with respect to the vertical center line of the first conduit (22), and the top surfaces of the two ear tabs (21) are fixed to the bottom surface of the bag assembly (3).
3. The retractable drainage bag according to claim 2, characterized in that: The plug assembly (2) also includes a hooking component (26), which is sleeved on the outer wall of the second conduit (24), and the top side of the hooking component (26) is inserted into the inside of the ear piece (21).
4. The retractable drainage bag according to claim 3, characterized in that: The hanging component (26) includes a pressure block (261), a locking post (262), a pull bar (263), and a fixing ring (264). The fixing ring (264) is sleeved on the outer wall of the second conduit (24). Two pull bars (263) are connected to the top surface of the fixing ring (264). The end of the pull bar (263) away from the fixing ring (264) is connected to the pressure block (261). The locking post (262) is fixed on one side of the pressure block (261). Multiple insertion holes (211) are opened inside the hanging ear piece (21). The locking post (262) is inserted into the insertion hole (211). The end of the locking post (262) away from the pressure block (261) has a conical structure.
5. The retractable drainage bag according to claim 2, characterized in that: The bag assembly (3) includes a liquid outlet pipe (31), an upper bag body (32), a telescopic bag (33), and a lower bag body (34). The upper bag body (32) is connected to the liquid outlet pipe (31) through the top surface. A sealing cap (4) is fitted onto the outer wall of the liquid outlet pipe (31). The upper bag body (32) is connected to the telescopic bag (33) through the bottom surface. The telescopic bag (33) is connected to the lower bag body (34) through the bottom surface.
6. The retractable drainage bag according to claim 1, characterized in that: The top of the guide tube (1) is fitted with a side push ring (11), and a locking block (12) is fixed on the top surface of the side push ring (11). There are two locking blocks (12) mirroring the vertical center line of the side push ring (11). The outer wall of the plug tube (25) is fitted with a locking protrusion ring (251). The locking protrusion ring (251) is a circular ring structure that is narrow at the top and wide at the bottom. The two locking blocks (12) cooperate to lock tightly against the outer wall of the locking protrusion ring (251).
7. The retractable drainage bag according to claim 1, characterized in that: The outer wall of the top end of the connector (5) is fitted with a first rotary ring (51), and the outer wall of the end of the connector (5) away from the first rotary ring (51) is fitted with a second rotary ring (53). One end of the second rotary ring (53) is connected to an installation cylinder (54), and the inner wall of the installation cylinder (54) is provided with an internal thread.