Colon lavage device for children

Abstract

The invention discloses a child colon lavage device and relates to the technical field of clinical nursing. The device comprises a liquid storage tank, a liquid inlet transmission box, a fluid driving part, a liquid outlet transmission box and a negative pressure generating part, the liquid inlet transmission box is provided with a liquid inlet cavity, the liquid inlet cavity is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet is communicated with the liquid storage tank through a first pressure difference one-way valve, and the first liquid outlet is communicated with a liquid inlet pipe through a second pressure difference one-way valve; the fluid driving part and the negative pressure generating part are in transmission connection, when the fluid driving part generates extrusion force, the negative pressure generating part synchronously moves to generate adsorption force, the liquid inlet process of lavage liquid and the liquid discharging process of lavage backflow liquid form mechanical linkage, the extrusion force and the flow speed of the inlet liquid are matched with the negative pressure adsorption force and the suction rate of the discharged liquid, and therefore the suction efficiency of the lavage liquid is improved. The amount of lavage fluid injected into the intestinal tract can be matched with the amount of sucked backflow fluid in real time, and the risks of abdominal distension, abdominal pain, intestinal mucosa injury and perforation caused by deposition of a large amount of lavage fluid are avoided.

Description

Technical Field

[0001] This invention relates to the field of clinical nursing technology, specifically to a pediatric colonic irrigation device. Background Technology

[0002] Colonic irrigation is a routine procedure in clinical gastroenterology, proctology, and nursing. It mainly involves injecting irrigation fluid into the rectum and colon through the anus to soften and expel feces, accumulated gas, and secretions from the intestines, thereby achieving intestinal cleansing and assisting in the treatment of intestinal diseases. Negative pressure colonic irrigation devices can actively expel excrement through negative pressure suction, greatly improving irrigation efficiency and ease of operation, and have become the mainstream irrigation device used in clinical practice.

[0003] Currently used negative pressure colonic irrigation devices mainly consist of an enema bag, an inlet tubing, a urinary catheter, a negative pressure drainage bottle, and an outlet tubing. The irrigation fluid in the enema bag flows naturally into the intestine through the inlet tubing, while the negative pressure drainage bottle continuously generates negative pressure through the outlet tubing, drawing the irrigation fluid and excrement from the intestine into the drainage bottle. However, the inlet and outlet processes of the above device are two independent operations. The inlet tubing relies solely on gravity or simple manual squeezing to inject the irrigation fluid, and its inlet flow rate and volume are entirely determined by the operation of medical staff or the natural flow characteristics of the tubing. The negative pressure suction of the outlet tubing is continuously driven by an external negative pressure bottle, a negative pressure pump, and other independent negative pressure generating components. The magnitude of the negative pressure suction and the suction time are completely unaffected by the inlet process.

[0004] In this uncoordinated operating mode, when medical staff apply heavy pressure to the balloon, resulting in a large volume and high rate of irrigation fluid injection, the suction force of the negative pressure component cannot be increased synchronously, and the aspiration time cannot be adapted to the sudden increase in the amount of fluid in the intestine. It is difficult to quickly and fully aspirate the irrigation fluid and softened excrement in the intestine, resulting in a large amount of fluid accumulating in the intestine, causing patients to experience severe discomfort such as abdominal distension and abdominal pain. In fact, due to excessive pressure in the intestine, it increases the clinical risk of intestinal mucosal damage and perforation. On the other hand, when the irrigation fluid is injected in small volumes at low rates or the infusion action is paused, and only a small amount of fluid remains in the intestine to be aspirated, the negative pressure component continues to aspirate indiscriminately. This not only prematurely aspirates the irrigation fluid that has not been fully softened and rinsed, reducing the irrigation effect, but also causes the intestinal mucosa to be pulled by negative pressure due to empty aspiration or excessive aspiration, which can also easily cause mucosal damage. At the same time, it also results in the ineffective consumption of irrigation fluid. Summary of the Invention

[0005] The purpose of this invention is to address the problems in existing negative pressure colonic lavage devices where the inlet and outlet processes are independent, and the suction force, suction time, inlet flow rate, inlet volume, and actual volume of fluid in the intestine are completely unrelated. This can easily lead to intestinal fluid accumulation or premature extraction of the lavage fluid, reducing the lavage effect and increasing clinical risks such as intestinal mucosal damage and perforation. Therefore, this invention provides a colonic lavage device for children.

[0006] The technical solution of the present invention is: a pediatric colonic irrigation device, comprising: a liquid storage tank;

[0007] The liquid inlet transfer box has a liquid inlet chamber, which is provided with a first liquid inlet and a first liquid outlet. The first liquid inlet is connected to the liquid storage tank through a first differential pressure check valve, and the first liquid outlet is connected to the liquid inlet pipe through a second differential pressure check valve. The liquid storage tank, the first differential pressure check valve, the liquid inlet transfer box, the second differential pressure check valve, and the liquid inlet pipe together form a liquid inlet channel for the positive flow of irrigation liquid.

[0008] A fluid drive unit is movably installed in the liquid inlet chamber. When the fluid drive unit moves relative to the liquid inlet transfer box, it can generate a squeezing force to drive the irrigation fluid to flow forward along the liquid inlet channel and out through the liquid inlet pipe.

[0009] The drain transfer box has a drain chamber, which is provided with a second inlet and a second outlet. The second inlet is connected to the drain pipe through a third differential pressure check valve, and the second outlet is connected to the collection box through a fourth differential pressure check valve. The drain pipe, the third differential pressure check valve, the drain transfer box, the fourth differential pressure check valve, and the collection box together form a drain channel for the reverse flow of the irrigation return fluid.

[0010] A negative pressure generator is movably installed in the drain chamber. When the negative pressure generator moves relative to the drain transfer box, it can generate an adsorption force to drive the rinsing return liquid to flow in the opposite direction along the drain channel and flow into the collection box.

[0011] The fluid drive unit is connected to the negative pressure generator and moves synchronously. When the fluid drive unit moves relative to the liquid inlet transfer box, the negative pressure generator moves synchronously relative to the liquid outlet transfer box.

[0012] Furthermore, the fluid drive component is a first piston that is slidably mounted in the liquid inlet chamber, and a first rod is connected to the first piston, with one end of the first rod extending out of the liquid inlet transfer box;

[0013] The negative pressure generating component is a second piston that is slidably installed in the drainage chamber. A second rod is connected to the second piston. One end of the second rod extends out of the drainage transmission box and is connected to the first rod.

[0014] A handle is connected to the portion of the first rod located outside the liquid inlet transfer box or the portion of the second rod located outside the liquid outlet transfer box.

[0015] Furthermore, the first rod and the second rod are detachably connected.

[0016] Furthermore, in the first rod and the second rod, one rod has a threaded groove on its end face, and the other rod has a threaded rod that mates with the threaded groove connected to its end face.

[0017] Furthermore, the liquid inlet transfer box and the liquid outlet transfer box are arranged opposite each other in the horizontal direction, and the axis of the first rod and the axis of the second rod are located on the same straight line.

[0018] Furthermore, the first liquid inlet and the first liquid outlet are both located on the side of the liquid inlet transfer box away from the liquid outlet transfer box, and the second liquid inlet and the second liquid outlet are both located on the side of the liquid outlet transfer box away from the liquid inlet transfer box.

[0019] Furthermore, the inlet pipe and the outlet pipe are composed of two independent chambers within an integral double-lumen pipe.

[0020] Furthermore, the openings of the inlet pipe are evenly distributed in an array on the circumferential surface of the integrated dual-lumen tube.

[0021] Furthermore, the opening of the drain pipe is separately arranged on the end face of the integrated double-lumen tube.

[0022] Furthermore, it also includes: a support frame for support on the ground, the support frame having slots for respectively placing the liquid inlet transfer box and the liquid outlet transfer box.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. The pediatric colonic irrigation device provided by this invention connects the fluid drive component and the negative pressure generator through a transmission connection. When the fluid drive component generates extrusion force, the negative pressure generator moves synchronously to generate adsorption force, so that the process of inlet of irrigation fluid and the process of outlet of irrigation return fluid form a mechanical linkage. The extrusion force and flow rate of inlet fluid are matched with the negative pressure adsorption force and suction rate of outlet fluid. The amount of irrigation fluid injected into the intestine can be matched with the amount of outlet fluid in real time. This avoids the risk of abdominal distension, abdominal pain, intestinal mucosal damage and perforation caused by large accumulation of irrigation fluid, and also prevents mucosal damage and ineffective consumption of irrigation fluid caused by empty suction or excessive suction. This improves the safety and effectiveness of colonic irrigation and reduces the clinical risks of pediatric irrigation.

[0025] 2. The pediatric colonic irrigation device provided by the present invention integrates the negative pressure generating component into the drainage chamber and drives and moves synchronously with the fluid driving component at the inlet end. This eliminates the need for separate external negative pressure bottles, negative pressure pumps and other independent negative pressure generating devices, thus eliminating the dependence of traditional irrigation devices on additional negative pressure equipment. This simplifies the overall structure of the device, reduces the number of parts and space occupied, and lowers manufacturing costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 yes Figure 1 Cross-sectional view of the liquid inlet transfer tank;

[0028] Figure 3 yes Figure 1 Exploded view;

[0029] Figure 4 yes Figure 1 Cross-sectional view of the integrated double-lumen tube;

[0030] Figure 5 yes Figure 1 Enlarged view of the integrated dual-lumen tube;

[0031] Figure 6 yes Figure 3 Enlarged view of the first piston in the middle.

[0032] In the diagram: 1. Storage tank; 2. Inlet transfer box; 3. Inlet chamber; 4. First inlet; 5. First outlet; 6. First differential pressure check valve; 7. Second differential pressure check valve; 8. Inlet pipe; 9. Outlet transfer box; 10. Outlet chamber; 11. Second inlet; 12. Second outlet; 13. Third differential pressure check valve; 14. Outlet pipe; 15. Fourth differential pressure check valve; 16. Collection box; 17. First piston; 18. First rod; 19. Second piston; 20. Second rod; 21. Handle; 22. Threaded groove; 23. Threaded rod; 24. Integrated double-lumen tube; 25. Support frame; 26. Slot. Detailed Implementation

[0033] Specific implementation method one: Combining Figures 1 to 4This embodiment includes a storage tank 1, an inlet transfer box 2, a fluid drive unit, a drain transfer box 9, and a negative pressure generator. The inlet transfer box 2 has an inlet chamber 3, which is provided with a first inlet 4 and a first drain 5. The first inlet 4 is connected to the storage tank 1 through a first differential pressure check valve 6, and the first drain 5 is connected to the inlet pipe 8 through a second differential pressure check valve 7. The storage tank 1, the first differential pressure check valve 6, the inlet transfer box 2, the second differential pressure check valve 7, and the inlet pipe 8 together form an inlet channel for the positive flow of the irrigation fluid. The first differential pressure check valve 6 only allows the irrigation fluid to flow from the storage tank 1 to the outlet 9. The inlet transfer box 2 and the second differential pressure check valve 7 only allow the irrigation fluid to flow from the inlet transfer box 2 to the inlet pipe 8. The limiting direction of the first differential pressure check valve 6 and the second differential pressure check valve 7 is the forward flow direction. The fluid drive component is movably installed in the inlet chamber 3. When the fluid drive component moves relative to the inlet transfer box 2, it can generate a squeezing force to drive the irrigation fluid to flow forward along the inlet channel and out through the inlet pipe 8. The outlet transfer box 9 has an outlet chamber 10, which is provided with a second inlet port 11 and a second outlet port 12. The second inlet port 11 is connected to the outlet pipe 14 through the third differential pressure check valve 13. Liquid outlet 12 is connected to collection tank 16 via fourth differential pressure check valve 15. The drain pipe 14, third differential pressure check valve 13, drain transfer tank 9, fourth differential pressure check valve 15, and collection tank 16 together form a drain channel for the reverse flow of the rinsing return fluid. Third differential pressure check valve 13 only allows the rinsing return fluid to flow from drain pipe 14 to drain transfer tank 9, and fourth differential pressure check valve 15 only allows the rinsing return fluid to flow from drain transfer tank 9 to collection tank 16. The restrictive directions of third differential pressure check valve 13 and fourth differential pressure check valve 15 are the reverse flow directions. A negative pressure generator is movably installed within the drain chamber 10. When the negative pressure generator... When the fluid drive unit moves relative to the inlet transfer box 2, it generates an adsorption force to drive the rinsing return fluid to flow in the opposite direction along the drain channel and flow into the collection box 16. The fluid drive unit is connected to the negative pressure generator and moves synchronously. When the fluid drive unit moves relative to the inlet transfer box 2, the negative pressure generator moves synchronously relative to the drain transfer box 9. The negative pressure generator moves with the movement of the fluid drive unit. It should be noted that each check valve and other components are connected by pipelines. The pipelines are used to allow the liquid to flow. The top of the storage tank 1 is equipped with a hook, which can be installed by hanging. The collection box 16 can be placed on the ground.

[0034] The pediatric colonic irrigation device of this embodiment connects the fluid drive component and the negative pressure generator. When the fluid drive component generates extrusion force, the negative pressure generator moves synchronously to generate adsorption force, thus creating a mechanical linkage between the inflow of irrigation fluid and the outflow of irrigation return fluid. The extrusion force and flow rate of the inflow fluid are matched with the negative pressure adsorption force and suction rate of the outflow fluid. The amount of irrigation fluid injected into the intestine can be matched with the amount of aspirated return fluid in real time. This avoids the risk of abdominal distension, abdominal pain, intestinal mucosal damage, and perforation caused by excessive accumulation of irrigation fluid, and also prevents mucosal damage and ineffective consumption of irrigation fluid caused by empty suction or excessive suction. This improves the safety and effectiveness of colonic irrigation and reduces the clinical risks of pediatric irrigation.

[0035] Specific Implementation Method Two: Combining Figure 2 , Figure 3 , Figure 6 This embodiment differs from specific embodiment one in that the fluid driving component is a first piston 17 slidably installed in the inlet chamber 3, with a first rod 18 connected to the first piston 17. One end of the first rod 18 extends out of the inlet transfer box 2. The negative pressure generating component is a second piston 19 slidably installed in the outlet chamber 10, with a second rod 20 connected to the second piston 19. One end of the second rod 20 extends out of the outlet transfer box 9 and is connected to the first rod 18. A handle 21 is connected to either the portion of the first rod 18 located outside the inlet transfer box 2 or the portion of the second rod 20 located outside the outlet transfer box 9. The first piston 17 undergoes two movement processes within the inlet chamber 3. The first is a suction process, where the irrigation fluid flows into the inlet chamber through the first differential pressure check valve 6 due to the pressure difference. Inside chamber 3, a pushing process occurs, using pressure to force the rinsing fluid through the second differential pressure check valve 7 into the inlet pipe 8, and then into the colon. The movement of the second piston 19 is opposite to that of the first piston 17. During the pushing process of the first piston 17, the second piston 19 performs a suction process, drawing the rinsing fluid from the colon through the drain pipe 14 and the third differential pressure check valve 13 into the drain transfer tank 9. When the first piston 17 performs the suction process again, the second piston 19 performs a pushing process, using pressure to force the rinsing fluid through the fourth differential pressure check valve 15 into the collection tank 16. By controlling the movement of the pistons, the injection volume of the rinsing fluid can be precisely controlled, and the magnitude of the squeezing and suction forces can be precisely controlled. The inlet and outlet rates can be flexibly adjusted according to the child's physical condition. Other components and connections are the same as in specific implementation method one.

[0036] Specific implementation method three: Combining Figure 2 , Figure 3 , Figure 6This embodiment differs from Specific Embodiment Two in that the first rod 18 and the second rod 20 are detachably connected. This allows the inlet transfer box 2 and the outlet transfer box 9 to be separated. When the rinsing process is nearing its end, if further rinsing fluid injection is not needed, the two can be separated, and the second rod 20 can be operated alone to move the second piston 19 to suck out the remaining small amount of rinsing return fluid. This provides more versatile operation. The detachable structure also facilitates the storage, transportation, and component replacement of the device. If one rod or piston is damaged, it can be disassembled and replaced individually without replacing the entire device, reducing usage and maintenance costs. Other components and connections are the same as in Specific Embodiment Two.

[0037] Specific implementation method four: Combination Figure 2 , Figure 3 , Figure 6 This embodiment differs from Specific Embodiment Three in that, in the first rod 18 and the second rod 20, one rod has a threaded groove 22 on its end face, and the other rod has a threaded rod 23 that mates with the threaded groove 22 connected to its end face. The threaded connection is simple in structure and provides a strong connection, ensuring coaxiality after the rods are connected. This ensures the synchronicity and stability of the piston's reciprocating motion, avoiding asynchronous fluid inlet and outlet due to loose rod connections. Furthermore, the threaded connection allows for convenient disassembly and installation without the need for additional tools, enabling medical personnel to quickly assemble and disassemble the device, improving the efficiency of clinical operations and equipment maintenance. The threaded fit also provides good sealing, reducing gaps at the connection and preventing impurities from entering and affecting the device's operation. Other components and connections are the same as in Specific Embodiment Three.

[0038] Specific Implementation Method Five: Combining Figure 1 This embodiment differs from Specific Embodiment Two in that the inlet transfer box 2 and the outlet transfer box 9 are arranged opposite each other in the horizontal direction, and the axis of the first rod 18 and the axis of the second rod 20 are on the same straight line. This ensures that the reciprocating motion of the piston is on the same straight line, resulting in more even force distribution, reducing friction and jamming during piston sliding, and improving the smoothness and stability of the device operation. When the two pistons move, the rod is only subjected to axial thrust. This thrust is parallel to the rod and does not act perpendicularly to it, preventing bending and deformation of the rod and ensuring its stability in use. Other components and connections are the same as in Specific Embodiment Two.

[0039] Specific Implementation Method Six: Combination Figure 1 , Figure 2This embodiment differs from Specific Embodiment Five in that the first inlet 4 and the first outlet 5 are both located on the side of the inlet transfer box 2 away from the outlet transfer box 9, and the second inlet 11 and the second outlet 12 are both located on the side of the outlet transfer box 9 away from the inlet transfer box 2. The inlet transfer box 2 and the outlet transfer box 9 are symmetrically distributed, allowing the inlet and outlet channels to extend to both sides, avoiding the inlet and outlet pipes 14 from crossing and tangling in the middle of the device. This makes the pipe layout clearer and more organized, facilitating pipe connection and operation by medical personnel, and reducing flow obstruction caused by pipe compression. Other components and connections are the same as in Specific Embodiment Five.

[0040] Specific implementation method seven: Combining Figure 1 , Figure 4 , Figure 5 This embodiment differs from Specific Embodiment 1 in that the inlet pipe 8 and outlet pipe 14 are composed of two independent chambers within a single double-lumen tube 24. One chamber forms the inlet pipe 8, and the other forms the outlet pipe 14, thus combining the two pipes into one. This reduces the number of pipes inserted into the child's anus, minimizing stimulation and damage to the child's anus and rectum during insertion. It is also more suitable for the delicate intestinal physiology of children, improving the comfort and safety of irrigation. Other components and connections are the same as in Specific Embodiment 1.

[0041] Specific implementation method eight: Combination Figure 1 , Figure 4 , Figure 5 This embodiment differs from specific embodiment seven in that the openings of the inlet pipe 8 are evenly distributed in an array on the circumferential surface of the integrated double-lumen tube 24. This allows the irrigation fluid to be injected into the child's intestines in multiple directions around the circumference of the tube, avoiding local irritation and damage caused by the irrigation fluid rushing directly to the intestinal mucosa in one direction. At the same time, the even circumferential discharge allows the irrigation fluid to come into more thorough contact with feces and accumulated gas in the intestines, improving the softening and flushing effect. Other components and connections are the same as in specific embodiment seven.

[0042] Specific Implementation Method Nine: Combining Figure 1 , Figure 4 , Figure 5 This embodiment differs from specific embodiment seven in that the opening of the drain pipe 14 is separately arranged on the end face of the integrated double-lumen tube 24, allowing the return fluid to be directly aspirated from the end of the tube. Combined with the circumferential uniform fluid inlet design, a circumferential fluid inlet and end-drainage flow pattern is formed, allowing the irrigation fluid and excrement in the intestine to converge along the intestine towards the end of the tube, improving the adequacy of aspiration and reducing intestinal residue. Other components and connections are the same as in specific embodiment seven.

[0043] Specific Implementation Method Ten: Combining Figure 1 , Figure 3 This embodiment differs from specific embodiment one in that it also includes a support frame 25 for supporting the device on the ground. The support frame 25 has slots 26 for respectively placing the inlet transfer box 2 and the outlet transfer box 9. The support frame 25 allows the device to be stably placed on the ground, eliminating the need for medical personnel to operate it manually, freeing their hands and allowing them to focus on core operations such as tube insertion and observation of the child's condition, thus improving the convenience of clinical operations. The slots 26 of the support frame 25 can limit the movement of the transfer boxes, preventing the rods from tilting, the piston from jamming, or the tubes from falling off due to shaking or displacement of the device during irrigation, ensuring the stability of the device's operation. Other components and connections are the same as in any of specific embodiments one through nine.

[0044] The working principle of this implementation method is as follows:

[0045] Manually pushing handle 21 causes the first rod 18 and the second rod 20 to move synchronously, causing the first piston 17 to push towards the discharge side of the inlet chamber 3 and the second piston 19 to move towards the suction side of the discharge chamber 10. The two pistons move in opposite directions. The first piston 17 pushes the irrigation fluid in the inlet chamber 3, causing the pressure in the chamber to rise. The first differential pressure check valve 6 closes and the second differential pressure check valve 7 opens. Under the pressure, the irrigation fluid flows out along the inlet pipe 8 and is evenly injected into the child's intestines through the circumferential inlet of the integrated double-lumen tube 24. The second piston 19 moves towards the suction side, creating a negative pressure in the discharge chamber 10. The fourth differential pressure check valve 15 closes and the third differential pressure check valve 13 opens. Under the suction force of the negative pressure, the irrigation return fluid in the intestines enters the discharge pipe 14 through the discharge port at the end of the integrated double-lumen tube 24 and is temporarily stored in the discharge chamber 10.

[0046] The manual pull-back handle 21 drives the two pistons to move synchronously in opposite directions, causing the first piston 17 to move towards the liquid inlet chamber 3 to the liquid suction side and the second piston 19 to push towards the liquid outlet chamber 10 to the liquid outlet side. The movement of the first piston 17 towards the liquid suction side creates a negative pressure in the liquid inlet chamber 3, closing the second differential pressure check valve 7 and opening the first differential pressure check valve 6. The flushing fluid in the storage tank 1 is drawn into the liquid inlet chamber 3 under the action of the differential pressure, completing the replenishment of the flushing fluid and preparing for the next push-in injection. The second piston 19 pushes the temporarily stored return fluid in the liquid outlet chamber 10, increasing the pressure in the chamber. The third differential pressure check valve 13 closes and the fourth differential pressure check valve 15 opens. Under the action of the squeezing force, the return fluid flows from the liquid outlet chamber 10 into the collection tank 16, completing the collection of the return fluid.

[0047] When the pushing force is high and the speed is fast, the irrigation fluid is injected at a fast flow rate and in large volume. The negative pressure adsorption force generated simultaneously is also large and the suction rate is fast, which can quickly extract the refluxed fluid in the intestine and avoid fluid accumulation. When the pushing force is low and the speed is slow, the irrigation fluid is injected in small volume and at a slow flow rate. The negative pressure adsorption force is also reduced simultaneously to prevent excessive suction or empty suction from damaging the intestinal mucosa, while avoiding ineffective consumption of irrigation fluid.

[0048] The scope of this invention is not limited to the above-described embodiments; a combination of one or more specific embodiments can also achieve the purpose of the invention.

Claims

1. A pediatric colonic irrigation device, characterized in that, include: Storage tank (1); The liquid inlet transfer box (2) has a liquid inlet chamber (3), the liquid inlet chamber (3) is provided with a first liquid inlet (4) and a first liquid outlet (5), the first liquid inlet (4) is connected to the liquid storage tank (1) through a first differential pressure check valve (6), and the first liquid outlet (5) is connected to the liquid inlet pipe (8) through a second differential pressure check valve (7). The liquid storage tank (1), the first differential pressure check valve (6), the liquid inlet transfer box (2), the second differential pressure check valve (7) and the liquid inlet pipe (8) together form a liquid inlet channel for the positive flow of irrigation liquid. A fluid drive is movably installed in the liquid inlet chamber (3). When the fluid drive moves relative to the liquid inlet transfer box (2), it can generate a squeezing force to drive the irrigation fluid to flow forward along the liquid inlet channel and out through the liquid inlet pipe (8). The drain transfer box (9) has a drain chamber (10), which is provided with a second inlet (11) and a second outlet (12). The second inlet (11) is connected to the drain pipe (14) through a third differential pressure check valve (13), and the second outlet (12) is connected to the collection box (16) through a fourth differential pressure check valve (15). The drain pipe (14), the third differential pressure check valve (13), the drain transfer box (9), the fourth differential pressure check valve (15) and the collection box (16) together form a drain channel for the reverse flow of the irrigation return liquid. The negative pressure generator is movably installed in the drain chamber (10). When the negative pressure generator moves relative to the drain transfer box (9), it can generate an adsorption force to drive the irrigation return liquid to flow in the opposite direction along the drain channel and flow into the collection box (16). The fluid drive unit is connected to the negative pressure generator and moves synchronously. When the fluid drive unit moves relative to the liquid inlet transfer box (2), the negative pressure generator moves synchronously relative to the liquid outlet transfer box (9).

2. A pediatric colonic irrigation device according to claim 1, characterized in that, The fluid drive component is a first piston (17) that is slidably installed in the liquid inlet chamber (3). A first rod (18) is connected to the first piston (17), and one end of the first rod (18) extends out of the liquid inlet transfer box (2). The negative pressure generating component is a second piston (19) that is slidably installed in the drainage chamber (10). A second rod (20) is connected to the second piston (19). One end of the second rod (20) extends out of the drainage transmission box (9) and is connected to the first rod (18). A handle (21) is connected to the part of the first rod (18) located outside the liquid inlet transfer box (2) or the part of the second rod (20) located outside the liquid outlet transfer box (9).

3. A pediatric colonic irrigation device according to claim 2, characterized in that, The first rod (18) and the second rod (20) are detachably connected.

4. A pediatric colonic irrigation device according to claim 3, characterized in that, In the first rod (18) and the second rod (20), one rod has a threaded groove (22) on its end face, and the other rod has a threaded rod (23) that mates with the threaded groove (22) connected to its end face.

5. A pediatric colonic irrigation device according to claim 2, characterized in that, The liquid inlet transfer box (2) and the liquid outlet transfer box (9) are arranged opposite each other in the horizontal direction, and the axis of the first rod (18) and the axis of the second rod (20) are on the same straight line.

6. A pediatric colonic irrigation device according to claim 5, characterized in that, The first liquid inlet (4) and the first liquid outlet (5) are both located on the side of the liquid inlet transfer box (2) away from the liquid outlet transfer box (9), and the second liquid inlet (11) and the second liquid outlet (12) are both located on the side of the liquid outlet transfer box (9) away from the liquid inlet transfer box (2).

7. A pediatric colonic irrigation device according to claim 1, characterized in that, The inlet pipe (8) and the outlet pipe (14) are composed of two independent chambers within an integral double-lumen pipe (24).

8. A pediatric colonic irrigation device according to claim 7, characterized in that, The openings of the inlet pipe (8) are evenly distributed in an array on the circumferential surface of the integrated double-lumen tube (24).

9. A pediatric colonic irrigation device according to claim 7, characterized in that, The opening of the drain pipe (14) is separately arranged on the end face of the integrated double-lumen pipe (24).

10. A pediatric colonic irrigation device according to any one of claims 1-9, characterized in that, Also includes: A support frame (25) is used to support the liquid on the ground. The support frame (25) has slots (26) for placing the liquid inlet transfer box (2) and the liquid outlet transfer box (9) respectively.

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