Anti-reflux drainage tube with flushing function

Abstract

The utility model belongs to the field of medical instruments, and particularly provides an anti-reflux drainage tube with a flushing function, the front section of a guide head of the anti-reflux drainage tube is arc-shaped, secondary injury to a patient can be avoided when the anti-reflux drainage tube is placed, a flushing opening made of the same material as a developing line is arranged, and the position of the head of a pipeline can be judged according to the shape of the guide head when the drainage tube is placed. Misjudgment caused by pipeline bending and developing line coincidence is avoided; according to the device, the adapter substitute is arranged between the drainage tube and the connecting tube and has various specifications, so that pipelines with different diameters can be conveniently connected; the flushing tube and the drainage tube are integrally connected, so that the sealing performance can be ensured; the one-way valve is arranged between the conversion connector and the connecting pipe, liquid which is not drained in the pipeline is prevented from flowing back, and the external flow limiting valve is further arranged on the connecting pipe and can be used for adjusting the flow of negative pressure drainage.

Description

Technical Field

[0001] This utility model relates to the field of drainage tube technology, specifically to a backflow prevention drainage tube with flushing function. Background Technology

[0002] Drainage tubes are commonly used medical devices in surgical procedures to drain peritoneal fluid, digestive fluids, body fluids, pus, surgical residue, and incision exudate from body cavities to meet diagnostic and therapeutic needs. Currently, clinical needs for drainage tubes extend beyond drainage; they are also used for irrigation. However, existing irrigation drainage tubes have sharp-edged tips that can easily damage cells during insertion. Furthermore, the tubes are easily deformed by external forces, leading to blockage and secondary injury to the patient. Additionally, the tubes have a certain length protruding outside the body; after negative pressure suction stops, fluid remaining in the tube can easily flow back into the body, posing a risk of infection.

[0003] Therefore, there is an urgent need in this field for a compression-resistant, easy-to-insert, and flushing-equipped anti-backflow drainage tube. Summary of the Invention

[0004] To address the issues of secondary injury to patients during drainage tube placement, easy deformation leading to tube blockage, and backflow problems in existing technologies, this invention provides a backflow prevention drainage tube with a flushing function. The guide head has an arc-shaped tip to avoid secondary injury to the patient during placement. A flushing opening made of the same material as the radiopaque line allows for accurate positioning of the tube head based on the guide head's shape, preventing misjudgment due to tube bends or overlapping radiopaque lines. The device includes a conversion connector between the drainage tube and the connecting tube, available in various sizes to facilitate connection of tubes of different diameters. The flushing tube is integrally connected to the drainage tube, ensuring a tight seal. A one-way valve is installed between the conversion connector and the connecting tube to prevent backflow of undrained fluid. An external flow-limiting valve is also installed on the connecting tube to regulate the flow rate of negative pressure drainage.

[0005] The specific technical solution of this utility model is as follows:

[0006] A backflow prevention drainage tube with flushing function includes a guide head, a drainage tube, a connecting tube, and a negative pressure connector connected in sequence. A conversion connector is provided between the drainage tube and the connecting tube. The drainage tube is provided with a drainage chamber and a flushing chamber. A drainage groove is provided on the tube wall at the front end of the drainage tube, and a drainage hole is provided in the drainage groove. The drainage groove communicates with the drainage chamber through the drainage hole. A flushing hole is provided on the tube wall of the drainage tube, and the flushing hole is connected to the flushing chamber. A flow limiting valve is provided on the outside of the connecting tube. The flow limiting valve consists of a fastening head, a support base, and a fixing strap.

[0007] The drainage tube described above features a dual-lumen design: a larger lumen for drainage and a smaller lumen for flushing, preventing infection from mixing different lumen components. The guide head is arc-shaped to prevent damage to cells during placement, avoiding secondary harm to the patient. An adapter facilitates connection between the drainage tube and the connecting tube, and the adapter is easy to install and remove. Furthermore, the adapter is available in various sizes and forms, allowing selection based on different tube diameters. The adapter and tubing are interference-fitted. The adapter is made of the same material as the drainage and flushing tubes.

[0008] Furthermore, the support base of the flow limiting valve has a threaded hole at its center for the fastening head to pass through, and the threaded hole has an internal thread corresponding to the external thread of the fastening head; one side of the support threaded hole is the inlet of the fixing band, and the other side is the outlet of the fixing band, with a push switch shaft-connected to the outer side of the fixing band outlet; one side of the fixing band has a raised tail section, and the other side has a head section, with continuous triangular teeth on the outer side of the fixing band. The push switch has teeth that match the triangular teeth on the outer side of the fixing band.

[0009] When using the above-mentioned flow limiting valve, first, put the flow limiting valve on the outside of the connecting pipe, and adjust the insertion position of the fixing strap head at the fixing strap outlet to adapt to connecting pipes of different diameters; when performing flow limiting operation, directly rotate the fastening head to squeeze the connecting pipe, thereby reducing the diameter of the connecting pipe and playing the role of flow limiting.

[0010] Preferably, the outer wall of the drainage tube is provided with a developing line and markings; and the guide head is provided with a rinsing opening, which communicates with the rinsing chamber. The guide head is made of the same material as the developing line, allowing the position of the tube head to be determined based on the shape of the guide head during tube placement. That is, the correct placement of the drainage tube is confirmed by the alignment of the developing line on the tube wall with the developing part of the head, avoiding misjudgment due to tube bends or overlapping developing lines. It also helps the user confirm the insertion distance of the drainage tube. In addition, the inner wall of the drainage tube is provided with a protrusion facing the drainage chamber to prevent the drainage tube from collapsing and obstructing drainage.

[0011] Preferably, a first check valve is provided between the adapter and the connecting pipe. An integrally connected flushing pipe is provided on the drainage pipe, located below the adapter, and connected to the flushing chamber; a second check valve is provided on the flushing pipe. All of the above designs can effectively prevent backflow of undrained liquid in the pipeline.

[0012] A negative pressure connector is installed on the connecting pipe for connection to negative pressure equipment, facilitating quick operation by the user. The negative pressure connector uses a tapered interface and is made of rigid plastic, preferably PVC.

[0013] The anti-backflow drainage tube with flushing function provided by this utility model achieves the following beneficial effects:

[0014] 1) By setting the guide head to an arc shape, damage to tissue cells in the body can be greatly reduced, alleviating the patient's pain;

[0015] 2) The guide head is made of the same material as the developing line, and its combination with the developing line makes it easy to observe and confirm the position of the drainage tube head, avoiding misjudgment caused by the overlapping of the developing line due to the bend of the tube;

[0016] 3) By setting graduations on the surface of the drainage tube, users can easily determine the insertion length;

[0017] 4) The conversion joint between the drainage pipe and the connecting pipe improves the flexibility of pipe installation, connection and disassembly, and different conversion joints can be selected according to different pipe diameters;

[0018] 5) An integrated flushing tube is installed on the drainage tube to ensure sealing. At the same time, a first check valve is installed on the flushing tube to prevent backflow and contamination of the flushing tube and flushing fluid.

[0019] 6) A second check valve is installed between the adapter and the connecting pipe to prevent drainage fluid remaining in the pipeline from flowing back into the body;

[0020] 7) The connecting pipe has an external flow limiting valve, which makes it easy to adjust the flow rate of the negative pressure drainage. The position can be adjusted up and down, which provides better flexibility. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a detailed view of the end face of the drainage tube of this utility model;

[0023] Figure 3 This is a schematic diagram of the end cross-section of the drainage tube in this utility model;

[0024] Figure 4 This is a schematic diagram of the markings on the drainage tube in this utility model;

[0025] Figure 5 This is a schematic diagram of the guide head in this utility model;

[0026] Figure 6 This is a schematic diagram of the flow limiting valve in this utility model.

[0027] In the diagram, 1 is the guide head, 1-1 is the flushing opening, 2 is the drainage tube, 2-1 is the drainage chamber, 2-2 is the drainage groove, 2-3 is the drainage hole, 2-4 is the flushing chamber, 2-5 is the flushing hole, 3 is the conversion connector, 4 is the first one-way valve, 5 is the flow limiting valve, 5-1 is the fastening head, 5-2 is the support base, 5-21 is the inlet of the fixing belt, 5-22 is the outlet of the fixing belt, 5-23 is the switch, 5-3 is the fixing belt, 5-31 is the tail of the fixing belt, 5-32 is the triangular tooth, 5-33 is the head of the fastening belt, 6 is the connecting tube, 7 is the negative pressure connector, 8 is the flushing tube, 8-1 is the second one-way valve, 9 is the developing line, and 10 is the protrusion. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to specific embodiments. These embodiments are only used to illustrate the technical solution of this utility model in more detail and should not be construed as limiting the scope of protection of this utility model.

[0029] like Figure 1 As shown, this utility model provides an anti-backflow drainage tube with a flushing function, including a guide head 1, a drainage tube 2, a connecting tube 6 and a negative pressure connector 7 connected in sequence. A conversion connector 3 is provided between the drainage tube 2 and the connecting tube 6. A negative pressure connector 7 is provided on the connecting tube 6 for connection with a negative pressure device, which facilitates quick operation by the user.

[0030] like Figure 2 and 3 As shown, the outer wall of the drainage tube 2 is provided with a radiographic line 9. The drainage tube 2 contains a drainage cavity 2-1 and a flushing cavity 2-4. A drainage groove 2-2 is provided on the tube wall at the front end of the drainage tube 2, and a drainage hole 2-3 is provided within the drainage groove 2-2. That is, a drainage hole 2-3 is provided on the tube wall between the drainage groove 2-2 and the drainage cavity 2-1, and the drainage groove 2-2 communicates with the drainage cavity 2-1 through the drainage hole 2-3. A flushing hole 2-5 is provided on the tube wall of the drainage tube 2, and the flushing hole 2-5 is connected to the flushing cavity 2-4. The dual-cavity design of the drainage cavity 2-1 and the flushing cavity 2-4 avoids the infection problem caused by using the same cavity for drainage and flushing. The inner wall of the drainage tube 2 also has symmetrically arranged protrusions 10 facing the drainage cavity 2-1, which can prevent the drainage tube 2 from collapsing and obstructing drainage.

[0031] like Figure 4 As shown, the drainage tube 2 is marked with scales to help users confirm the insertion distance of the drainage tube.

[0032] like Figure 5 As shown, the guide head 1 is provided with a rinsing opening 1-1, which communicates with the rinsing chamber 2-4. The guide head 1 is made of the same material as the developing line 9, which facilitates direct observation and confirmation of the tube placement head position.

[0033] A conversion joint 3 is provided between the drainage pipe 2 and the connecting pipe 6. The conversion joint 3 has various specifications and forms. In actual use, different conversion joints 3 are selected according to different pipe diameters. The conversion joint 3 and the pipeline adopt an interference fit, which makes it easy to install, connect and disassemble the drainage pipe 2 and the connecting pipe 6. A first one-way valve 4 is provided between the conversion joint 3 and the connecting pipe 6 to prevent backflow of liquid that has not been drained in the pipeline. An integrated flushing pipe 8 is provided on the drainage pipe 2, located below the conversion joint 3. The flushing pipe 8 is connected to the flushing chamber 2-4. A second one-way valve 8-1 is provided on the flushing pipe 8 to prevent backflow and contamination of the flushing pipe and flushing fluid.

[0034] like Figure 1 and Figure 6 As shown, a flow-limiting valve 5 is provided on the outside of the connecting pipe 6. The flow-limiting valve 5 consists of a fastening head 5-1, a support base 5-2, and a fixing band 5-3. The support base 5-2 has a screw hole in the center for the fastening head 5-1 to pass through, and the screw hole has an internal thread corresponding to the external thread of the fastening head 5-1. One side of the support screw hole is the fixing band inlet 5-21, and the other side is the fixing band outlet 5-22. A push switch 5-23 is shaft-connected to the outside of the fixing band outlet 5-22. One side of the fixing band 5-3 has a fixing band tail 5-31 with a protrusion, and the other side is the fixing band head 5-33. The outer side of the fixing band 5-3 has continuous triangular teeth 5-32.

[0035] The fixing strap is inserted into the fixing strap inlet 5-21 from the head and secured by the protrusion on the fixing strap tail 5-31 to prevent it from completely protruding from the support base 5-2. After the fixing strap 5-3 wraps around the connecting tube 6, the fixing strap head 5-33 is inserted into the fixing strap outlet 5-22. The push switch 5-23 is equipped with teeth that match the triangular teeth 5-32 on the outer side of the fixing strap 5-3. By flipping the push switch 5-23, the teeth can engage or disengage with the triangular teeth, thereby adjusting the position of the fixing strap head 5-33 to accommodate connecting tubes 6 of different diameters. The bottom of the fastening head 5-1 is rounded to avoid damage to the drainage tube body.

[0036] The specific implementation method is as follows:

[0037] The guide head 1 is inserted into the body through the surface opening. Because the guide head 1 is arc-shaped, it can greatly reduce the damage of the tube head to the body's tissue cells. The user determines the insertion length by the scale on the surface of the tube. Since the guide head 1 is made of the same material as the imaging line 9, the user can observe the position of the guide head and further determine the specific position of the tube by the imaging line 9. Then, the negative pressure device is directly connected through the negative pressure connector 7 to aspirate the liquid.

[0038] If there is concern about excessive negative pressure during operation, the drainage flow can be adjusted by regulating the flow-limiting valve 5 on the pipeline. First, install the flow-limiting valve 5 on the outside of the connecting pipe 6. Adjust the insertion position of the fixing strap head 5-33 at the fixing strap outlet 5-22 to accommodate connecting pipes 6 of different diameters. When performing flow-limiting operations, directly rotate the fastening head 5-1 to squeeze the connecting pipe 6, thereby reducing the diameter of the connecting pipe and achieving the function of flow restriction. A first one-way valve 4 is also provided between the conversion connector 3 and the connecting pipe 6 to prevent drainage fluid remaining in the pipeline from flowing back into the body. When flushing is required, the user can add flushing fluid through the flushing pipe 8. The flushing pipe 8 is equipped with a second one-way valve 8-1 to prevent backflow.

[0039] This utility model provides a backflow prevention drainage tube with a flushing function, which simultaneously functions as drainage, flushing, and backflow prevention. The arc-shaped guide head prevents damage to cells during placement. The combination of the arc-shaped guide head and the imaging line facilitates direct observation and confirmation of the tube head position, avoiding misjudgments caused by overlapping imaging lines due to tube bends. Graduation is provided on the surface of the drainage tube to help users determine the insertion length. The use of a conversion connector improves the flexibility of tube installation, connection, and disassembly. An integrated flushing tube is incorporated into the drainage tube to ensure tube sealing, and a second one-way valve on the flushing tube prevents backflow contamination of the flushing tube and flushing fluid. An external flow-limiting valve on the connecting tube not only facilitates adjustment of the negative pressure drainage flow rate but also adapts to various tube diameters and is easy to install and disassemble. A first one-way valve between the conversion connector and the connecting tube prevents residual drainage fluid in the tube from flowing back into the body. This device is easy to install and disassemble, simple to operate, and not prone to clogging, saving time for surgical drainage and cleaning and reducing patient discomfort.

Claims

1. A backflow prevention drainage tube with flushing function, comprising a guide head (1), a drainage tube (2), a connecting tube (6), and a negative pressure connector (7) connected in sequence, wherein a conversion connector (3) is provided between the drainage tube (2) and the connecting tube (6), characterized in that: The drainage tube (2) is provided with a drainage chamber (2-1) and a flushing chamber (2-4). A drainage groove (2-2) is provided on the tube wall at the front end of the drainage tube (2). A drainage hole (2-3) is provided in the drainage groove (2-2). The drainage groove (2-2) is connected to the drainage chamber (2-1) through the drainage hole (2-3). A flushing hole (2-5) is provided on the tube wall of the drainage tube (2). The flushing hole (2-5) is connected to the flushing chamber (2-4). A flow limiting valve (5) is provided on the outside of the connecting tube (6). The flow limiting valve (5) consists of a fastening head (5-1), a support seat (5-2), and a fixing strap (5-3).

2. The anti-backflow drainage tube with flushing function according to claim 1, characterized in that: The support base (5-2) of the flow limiting valve (5) has a screw hole at its center for the fastening head (5-1) to pass through, and an internal thread corresponding to the external thread of the fastening head (5-1) is provided in the screw hole; one side of the support screw hole is the fixed belt inlet (5-21), and the other side is the fixed belt outlet (5-22), and a push switch (5-23) is shaft-connected to the outside of the fixed belt outlet (5-22); one side of the fixed belt (5-3) is the fixed belt tail (5-31) with a protrusion, and the other side is the fixed belt head (5-33), and the outside of the fixed belt (5-3) is provided with continuous triangular teeth (5-32).

3. The anti-backflow drainage tube with flushing function according to claim 1, characterized in that: The outer wall of the drainage tube (2) is provided with a developing line (9) and a marking scale.

4. The anti-backflow drainage tube with flushing function according to claim 2, characterized in that: The push switch (5-23) is provided with teeth that are compatible with the triangular teeth (5-32) provided on the outside of the fixing band (5-3).

5. The anti-backflow drainage tube with flushing function according to claim 1, characterized in that: The guide head (1) is provided with a flushing opening (1-1), and the flushing opening (1-1) is connected to the flushing chamber (2-4).

6. The anti-backflow drainage tube with flushing function according to claim 1, characterized in that: A first check valve (4) is provided between the adapter (3) and the connecting pipe (6).

7. The anti-backflow drainage tube with flushing function according to claim 1, characterized in that: The drainage tube (2) is provided with an integrally connected flushing tube (8), located below the conversion joint (3), and the flushing tube (8) is connected to the flushing chamber (2-4); the flushing tube (8) is provided with a second one-way valve (8-1).

8. The anti-backflow drainage tube with flushing function according to claim 1, characterized in that: The inner wall of the drainage tube (2) is also provided with a protrusion (10) facing the drainage cavity (2-1).

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