Anti-reflux drainage tube
By setting a unidirectional drainage structure in the bifurcation section of the drainage tube, combined with the main drainage tube section and the anti-backflow cover, the problem of backflow in the drainage tube is solved, achieving both convenience for patients during use and anti-backflow effect.
Patent Information
- Application Number
- CN202421970080.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-08-14
AI Technical Summary
Existing drainage tubes are prone to backflow of gas or liquid during use, which affects the patient's position and movement. Furthermore, the existing one-way regulating valve structure is easily deformed after high-temperature sterilization, making it difficult to effectively prevent backflow.
Design a backflow prevention drainage pipe, including a branch pipe section and a main drainage pipe section. The branch pipe section is equipped with a unidirectional drainage structure, and the end of the main drainage pipe section can be connected to an anti-backflow cover. Through the cooperation of the branch pipe section and the main drainage pipe section, unidirectional drainage is achieved to avoid backflow.
It effectively prevents gas or liquid backflow, allows patients to move around appropriately during use, improves the user experience, reduces blockages, and enhances ease of use.
Smart Images
Figure CN223615254U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, specifically relating to an anti-backflow drainage tube, which can be used for pneumothorax drainage, as well as for drainage of pus, blood, and fluid accumulated in body tissues or cavities such as the abdominal cavity, brain cavity, gastrointestinal tract, and bile duct. Background Technology
[0002] A drainage tube is a tube used for draining fluid or air. In surgery, it is commonly used to drain fluid, blood, or gas around a wound to prevent local infection and other complications. For example, in pneumothorax drainage (pneumothorax occurs when air enters the pleural cavity, causing an accumulation of air, requiring a drainage tube to remove the accumulated air), to prevent the backflow of air during drainage, current techniques typically involve inserting one end of the drainage tube into the pleural cavity and connecting the other end to a water-seal drainage bottle filled with saline solution. This allows for the drainage of air or collection of fluid from the pleural cavity, enabling the lungs to reopen and restore function. In this situation, the patient usually lies on their side, and is often hesitant to move freely for fear of compressing the drainage tube or causing the end of the tube to protrude above the water surface (preventing proper air or fluid drainage, and even causing reflux). Clearly, current techniques present many inconveniences in their use.
[0003] To overcome the aforementioned technical challenges, technicians attempted to add a one-way regulating valve to the end of the drainage tube to expel accumulated gas or liquid and prevent backflow. However, since the needle core of the drainage tube needs to penetrate the entire tube, it becomes difficult for the needle core to pass through the existing one-way regulating valve. To address this issue, technicians tried modifying the structure and material of the one-way regulating valve (e.g., changing the material to soft rubber, with corresponding structural changes). However, after modifying the structure and material, the needle core easily deforms the one-way regulating valve after passing through it. Furthermore, since the drainage tube needs to be sterilized in ethylene oxide at 50-60°C for 480 hours before use, the metal needle core conducts heat more quickly and reaches a higher temperature, potentially causing irreversible deformation of the soft rubber one-way regulating valve after sterilization, thus hindering its one-way regulating function. Therefore, the existing drainage tube structure needs improvement. Utility Model Content
[0004] The purpose of this invention is to solve the above-mentioned technical problems and provide an anti-backflow drainage tube that can prevent gas or liquid backflow. Patients can move their body position appropriately during use, resulting in a better experience.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a backflow prevention drainage pipe, including a drainage pipe body, wherein the end of the drainage pipe body is further branched into a bifurcated pipe section, the bifurcated pipe section and the main drainage pipe section at the end of the drainage pipe body are Y-shaped, the main drainage pipe section and the bifurcated pipe section are respectively connected to the drainage pipe body, the bifurcated pipe section is provided with a unidirectional drainage structure, and the end of the main drainage pipe section is connected to an anti-backflow cover.
[0006] In this invention, because the unidirectional drainage structure is located within the bifurcation section, and the main drainage section is part of the drainage tube body and aligned with it, the needle core does not need to pass through the bifurcation section when passing through the main drainage section, thus preventing deformation of the unidirectional drainage structure within the bifurcation section. When a large amount of accumulated liquid or gas needs to be drained, the liquid and / or gas can be extracted from the main drainage section using a syringe. Then, the anti-backflow cap at the end of the main drainage section can be screwed on or covered to prevent external air or liquid from flowing back into the drainage tube. When only a small amount of gas and / or liquid needs to be drained, it can be directly drained through the unidirectional drainage structure of the bifurcation section. Because the bifurcation section contains a unidirectional drainage structure, external air or liquid can be prevented from flowing back into the drainage tube. Furthermore, since the end of the drainage tube body of this application includes a bifurcated tube section and a main drainage tube section at the end of the drainage tube body, the main drainage tube section can extract the gas or liquid in the drainage tube through a syringe, thus reducing blockage to a certain extent.
[0007] Furthermore, in some application scenarios, the unidirectional drainage structure can be as follows: the unidirectional drainage structure includes one or more elastic valves, each valve protruding in the drainage direction, with an opening at its end, the edges of which abut against each other; the unidirectional drainage structure has an outer contour adapted to the inner wall of the bifurcation pipe section for placement within the bifurcation pipe section. When accumulated gas or liquid flows to the unidirectional drainage structure, under pressure, the abutting point of the elastic valve opening is forced open, allowing the gas or liquid to be drained to exit through the abutting point of the valve opening. Conversely, when no gas or liquid flows out, or when the pressure in the drainage direction is less than the pressure in the opposite direction (assuming the drainage direction is the positive direction and the opposite direction is the negative direction), the opening of the elastic valve closes due to its own elasticity, thereby achieving the unidirectional drainage function.
[0008] Furthermore, the opening can be one or more linear openings, such as a straight opening, a cross-shaped opening, or a wavy opening with interlocking edges.
[0009] Furthermore, in some other application scenarios, the unidirectional drainage structure can also be as follows: the unidirectional drainage structure is bowl-shaped, with an exhaust hole at the bottom and the opening fixed to the inner wall of the bifurcated pipe section; the drainage direction is from the bottom to the opening, and the cross-section of the bowl-shaped unidirectional drainage structure gradually increases along the drainage direction; a limiting structure is fixed on the inner wall of the bowl, and a circular baffle is provided inside the bowl, the baffle being limited between the bottom of the bowl and the limiting structure, the baffle being tightly attached to the bottom of the bowl, and its size being able to completely cover the bottom of the bowl; the limiting structure has through holes and / or openings for gas and / or liquid to pass through, while the baffle does not have through holes or openings for gas and / or liquid to pass through. The drainage direction is defined as the positive direction, and the direction opposite to the drainage direction is defined as the reverse direction. When the pressure in the positive direction is relatively high, meaning a certain amount of gas or liquid has accumulated, the accumulated gas and / or liquid will pass through the vent at the bottom of the bowl and push the baffle towards the limiting structure. Since the cross-section of the bowl-shaped unidirectional drainage structure gradually increases from the bottom to the rim, a gap will appear between the baffle and the bowl wall as the baffle pushes towards the limiting structure. The accumulated gas or liquid will flow through this gap towards the rim and then exit through the drainage tube. The function of the limiting structure is to restrict the baffle, keeping it between the limiting structure and the bottom of the bowl. When the pressure in the opposite direction is greater, the baffle is pushed towards the bottom of the bowl under the action of the pressure in the opposite direction. Since the cross-section of the bowl-shaped one-way drainage structure gradually decreases from the rim of the bowl to the bottom, the edge of the baffle will be tightly attached to the bowl wall, or the baffle will be tightly attached to the bottom of the bowl, tightly covering and sealing the vent hole at the bottom of the bowl. The greater the reverse pressure, the tighter the baffle is attached to the bowl wall and / or the bottom of the bowl, thus effectively preventing backflow and achieving the one-way drainage function.
[0010] Furthermore, the limiting structure has one or more protrusions on the side near the baffle that are higher than its plane. The purpose of these protrusions is to ensure that there is always a gap between the baffle and the limiting structure, so as to prevent the baffle from sealing the through holes or openings on the limiting structure and to improve the unidirectional drainage effect.
[0011] Furthermore, the distance between the bowl bottom and the limiting structure is not large, and can be slightly larger than the thickness of the baffle. Preferably, the size of the baffle is equal to the cross-section of the bowl bottom, the baffle is tightly attached to the bowl bottom, and the limiting effect is better when the minimum distance between the bowl bottom and the limiting structure is 3-6 times the thickness of the baffle.
[0012] Furthermore, the limiting structure can be a ring, a disc with one or more through holes, or an incomplete circle.
[0013] Furthermore, when the limiting structure is annular, it is provided with one or more extension strips to better limit the baffle and prevent it from bursting out of the limiting structure. Preferably, the extension strips are symmetrically arranged on the limiting structure.
[0014] As a preferred option, the baffle is made of soft rubber material, such as a circular rubber pad, which has the advantage of a tighter fit, thereby improving the anti-backflow effect.
[0015] In this invention, the limiting structure can be integrally formed with the bowl-shaped unidirectional drainage structure. The bowl-shaped unidirectional drainage structure can be integrally formed with the branch pipe section, or bonded or hot-pressed. For example, it can be glued to the inner wall of the branch pipe section, or integrally formed with the inner wall of the branch pipe section by injection molding.
[0016] As a preferred option, the inner diameter of the bifurcation pipe section gradually narrows and tapers along the drainage direction. This has the advantage of further reducing the backflow of external gas and / or liquid into the drainage pipe.
[0017] Compared with existing technologies, the advantages of this invention are: it avoids backflow of gas or liquid, and patients can move their bodies appropriately during use, resulting in a better experience. The principle behind these advantages is that, because the unidirectional drainage structure is located within the bifurcation section, the needle core does not need to pass through the bifurcation section when passing through the main drainage section, thus preventing deformation of the unidirectional drainage structure within the bifurcation section. When a large amount of accumulated fluid or gas needs to be drained, the liquid and / or gas can be drawn out from the main drainage section using a syringe, and then the anti-backflow cap at the end of the main drainage section can be screwed on or covered to prevent external air or liquid from flowing back into the drainage tube from the main drainage section. When only a small amount of gas and / or liquid needs to be drained, the small amount of gas or liquid can be directly drained through the unidirectional drainage structure of the bifurcation section. Because the bifurcation section has a unidirectional drainage structure, it prevents external air or liquid from flowing back into the drainage tube. Furthermore, since the end of the drainage tube body of this application includes a bifurcated tube section and a main drainage tube section at the end of the drainage tube body, the main drainage tube section can extract the gas or liquid in the drainage tube through a syringe, thus reducing blockage to a certain extent. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the drainage tube structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the unidirectional drainage structure of Embodiment 1 of this utility model;
[0020] Figure 3 This is a three-dimensional structural diagram (top view) of the unidirectional drainage structure of Embodiment 2 of this utility model;
[0021] Figure 4 for Figure 2 A schematic diagram of the unidirectional drainage structure when the baffle is removed;
[0022] Figure 5 This is a three-dimensional structural diagram (view from below) of the unidirectional drainage structure of Embodiment 2 of this utility model;
[0023] Figure 6 This is a top view (top-view orthographic projection view) of the unidirectional drainage structure of Embodiment 2 of this utility model;
[0024] Figure 7 This is a schematic diagram of the limiting structure in Embodiment 2 of this utility model;
[0025] Among them, 1-drainage pipe body; 2-unidirectional drainage structure; 3-anti-backflow cover; 11-main drainage pipe section; 12-branching pipe section;
[0026] 21-Elastic valve; 211-Opening; 22-Limiting structure; 221-Extension strip; 222-Protrusion; 23-Baffle; 24-Exhaust port. Detailed Implementation
[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0028] Example 1
[0029] like Figure 1 As shown, an anti-backflow drainage pipe includes a drainage pipe body 1, with a branch pipe section 12 branching out from the end of the drainage pipe body. The branch pipe section 12 and the main drainage pipe section 11 at the end of the drainage pipe body form a Y shape. The main drainage pipe section 11 and the branch pipe section 12 are respectively connected to the drainage pipe body 1. A one-way drainage structure 2 is provided in the branch pipe section 12. In this embodiment, the end of the main drainage pipe section is provided with an external thread, and the end of the main drainage pipe section is connected to an anti-backflow cover 3 through the external thread.
[0030] Because the unidirectional drainage structure of this invention is located within the bifurcation section, and the main drainage section 11 is part of the drainage tube body 1 and is aligned with the drainage tube body, the needle core does not need to pass through the bifurcation section when passing through the main drainage section, thus preventing deformation of the unidirectional drainage structure within the bifurcation section 12. When a large amount of accumulated liquid or gas needs to be drained, the liquid and / or gas can be extracted from the main drainage section 11 using a syringe, and then the anti-backflow cap 3 at the end of the main drainage section can be screwed on to prevent external air or liquid from flowing back into the drainage tube from the main drainage section.
[0031] like Figures 1-2 As shown ( Figure 2In this embodiment, the unidirectional drainage structure 2 includes one or more elastic valves 21, each elastic valve 21 protruding in the drainage direction, with an opening 211 at the protruding end, the edges of which abut against each other. The unidirectional drainage structure has an outer contour adapted to the inner wall of the bifurcation pipe section for placement within the bifurcation pipe section. When only a small amount of gas and / or liquid needs to be discharged, the small amount of gas or liquid can be directly discharged through the unidirectional drainage structure 2 of the bifurcation pipe section 12. When the accumulated gas or liquid flows to the unidirectional drainage structure, under pressure, the abutment of the elastic valve opening is forced open, and the gas or liquid to be drained is discharged through the abutment of the valve opening. Conversely, when no gas or liquid flows out, or when the pressure in the drainage direction is less than the pressure in the opposite direction (assuming the drainage direction is the positive direction and the opposite direction is the negative direction), the opening 211 of the elastic valve 21 closes due to its own elasticity, thereby achieving a unidirectional drainage function. Furthermore, since the end of the drainage tube in this application includes a bifurcated section 12 and a main drainage section 11 at the end of the drainage tube body, the main drainage section 11 can be used to extract gas or liquid from the drainage tube using a syringe, thus reducing blockage to some extent.
[0032] like Figure 2 As shown, in this embodiment, the opening 211 is a linear opening, and the unidirectional drainage structure 2 is duckbill-shaped. In this embodiment, part of the edge of the duckbill-shaped unidirectional drainage structure can be fixed to the inner wall of the bifurcation pipe section by any existing technology, such as bonding, hot pressing, etc.
[0033] Example 2
[0034] The difference between this embodiment and Embodiment 1 is that, as Figure 3-7As shown, the unidirectional drainage structure of this embodiment is as follows: The unidirectional drainage structure 2 is bowl-shaped, with an exhaust hole 24 at the bottom and the bowl opening fixed to the inner wall of the bifurcated pipe section 12; the drainage direction is from the bottom of the bowl to the bowl opening, and the cross-section of the bowl-shaped unidirectional drainage structure gradually increases along the drainage direction; a limiting structure 22 is fixedly provided on the inner wall of the bowl, and a circular baffle 23 is provided inside the bowl. The baffle 23 is limited between the bottom of the bowl and the limiting structure 22, and the baffle 23 is tightly attached to the bottom of the bowl, its size being able to completely cover the bottom of the bowl. The limiting structure 22 has through holes and / or openings for gas and / or liquid to pass through, while the baffle 23 does not have through holes or openings for gas and / or liquid to pass through. The drainage direction is defined as the positive direction, and the direction opposite to the drainage direction is defined as the reverse direction. When the pressure in the positive direction is relatively high, i.e., when a certain amount of gas or liquid accumulates, the accumulated gas and / or liquid will pass through the vent 24 at the bottom of the bowl and push the baffle 23 towards the limiting structure 22. Since the cross-section of the bowl-shaped unidirectional drainage structure gradually increases from the bottom to the rim, a gap will appear between the baffle 23 and the bowl wall when the baffle 23 is pushed towards the limiting structure 22. The accumulated gas or liquid flows through the gap towards the rim and is then discharged from the drainage pipe. The function of the limiting structure 22 is to limit the baffle 23, confining it between the limiting structure 22 and the bottom of the bowl. When the pressure in the opposite direction is greater, the baffle 23 is pushed towards the bottom of the bowl under the action of the pressure in the opposite direction. Since the cross-section of the bowl-shaped one-way drainage structure gradually decreases from the rim of the bowl to the bottom of the bowl, the edge of the baffle 23 will be tightly attached to the bowl wall or the bottom of the bowl, tightly covering and sealing the vent hole 24 at the bottom of the bowl. The greater the reverse pressure, the tighter the baffle is attached to the bowl wall and / or the bottom of the bowl, thus effectively preventing backflow and realizing the one-way drainage function.
[0035] In this embodiment, the limiting structure is annular, and the baffle is made of soft rubber. The limiting structure 22 has one or more extension strips 221 to better limit the baffle 23 and prevent it from protruding from the limiting structure. In this embodiment, the extension strips 221 are symmetrically arranged on the limiting structure 22. Figure 7 As shown, the limiting structure has one or more protrusions on the side near the baffle that are higher than its plane. The function of these protrusions is to ensure that there is always a gap between the baffle and the limiting structure, so as to prevent the baffle from sealing the through holes or openings on the limiting structure and to improve the unidirectional drainage effect.
[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should be considered within the protection scope of the present utility model.
Claims
1. A backflow prevention drainage tube, characterized in that: It includes a drainage tube body, and the end of the drainage tube body branches into a branch pipe section. The branch pipe section and the main drainage tube section at the end of the drainage tube body form a Y shape. The main drainage tube section and the branch pipe section are respectively connected to the drainage tube body. The branch pipe section is provided with a one-way drainage structure. The end of the main drainage tube section is connected to an anti-backflow cover.
2. The anti-backflow drainage tube according to claim 1, characterized in that: The unidirectional drainage structure includes one or more elastic valves, which protrude in the drainage direction and have an opening at the end of the protrusion, with the edges of the opening abutting each other; the unidirectional drainage structure has an outer contour that adapts to the inner wall of the bifurcation pipe section so as to be installed in the bifurcation pipe section.
3. The anti-backflow drainage tube according to claim 1, characterized in that: The unidirectional drainage structure is bowl-shaped, with an exhaust hole at the bottom and the opening fixed to the inner wall of the bifurcated pipe section. The drainage direction is from the bottom to the opening, and the cross-section of the bowl-shaped unidirectional drainage structure gradually increases along the drainage direction. A limiting structure is fixed on the inner wall of the bowl, and a circular baffle is provided inside the bowl. The baffle is limited between the bottom of the bowl and the limiting structure, and the baffle is tightly attached to the bottom of the bowl. Its size is such that it can completely cover the bottom of the bowl. The limiting structure has through holes and / or openings for gas and / or liquid to pass through, while the baffle does not have through holes or openings for gas and / or liquid to pass through.
4. The anti-backflow drainage tube according to claim 3, characterized in that: The limiting structure is a ring, a disc with one or more through holes, or an incomplete circle.
5. The anti-backflow drainage tube according to claim 4, characterized in that: When the limiting structure is circular, one or more extension strips are provided on the limiting structure.
6. The anti-backflow drainage tube according to claim 5, characterized in that: The extension strip is symmetrically disposed on the limiting structure.
7. The anti-backflow drainage tube according to claim 3, characterized in that: The limiting structure has one or more protrusions that are higher than its plane on the side near the baffle.
8. The anti-backflow drainage tube according to claim 3, characterized in that: The size of the baffle is equal to the cross-section of the bowl bottom. The baffle is tightly attached to the bowl bottom, and the minimum distance between the bowl bottom and the limiting structure is 3-6 times the thickness of the baffle.
9. The anti-backflow drainage tube according to claim 3, characterized in that: The baffle is made of soft rubber.
10. The anti-backflow drainage tube according to any one of claims 1-9, characterized in that: Along the direction of drainage, the inner diameter of the branch pipe section gradually narrows and becomes thinner.