Peritoneal dialysis device

Abstract

The utility model relates to the field of medical instruments, in particular to a peritoneal dialysis device which comprises a three-way valve, the three-way valve comprises a valve body and a reversing switch used for switching fluid flow, the valve body comprises a first end, a second end and a third end, and the first end, the second end and the third end are communicated through channels. The third end is connected with an abdominal cavity catheter, and the channel can be controlled to be closed by adjusting the reversing switch; the dialysis system comprises a dialysis bag used for storing dialysate, the dialysis bag is connected with one end of a dialysis catheter, and the other end of the dialysis catheter is fixedly connected with the first end; the drainage system comprises a drainage bag used for storing drainage liquid, and the drainage bag is connected with one end of a drainage catheter. According to the peritoneal dialysis device, the drainage bag and the dialysis bag which can be adjusted and accurately metered are arranged, so that the whole peritoneal dialysis device can be more suitable for the peritoneal dialysis process of infants.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a peritoneal dialysis device. Background Art

[0002] Peritoneal dialysis is a dialysis method that uses the body's own peritoneum as a dialysis membrane. The dialysate infused into the peritoneal cavity exchanges solutes and water with the plasma components in the capillaries on the other side of the peritoneum, removes metabolic products and excess water retained in the body, and replenishes the body's necessary substances through the dialysate. It is increasingly widely used in infants and young children after congenital heart disease surgery. Nowadays, most complex malformations of congenital heart disease require difficult and long surgeries, especially in neonates, which can cause acute renal failure after surgery, and have signs of low cardiac output and renal insufficiency. Early and active peritoneal dialysis treatment can appropriately reduce the postoperative mortality rate. Peritoneal dialysis is simple to operate, has little effect on hemodynamics, and the peritoneal area per unit body weight of infants and young children is larger than that of adults. The permeability to small and medium-molecule substances is similar to that of adults, with a high filtration rate and a good effect of peritoneal dialysis. During peritoneal dialysis, the dialysate needs to be transported into the abdominal cavity, and the exchanged waste fluid needs to be discharged from the abdominal cavity after a period of time, so the dialysate bag and drainage bag need to be connected to the peritoneal catheter in the human abdomen. According to the industry standard YY / T1760-2021, peritoneal dialysis currently mostly uses a dual system device, and adults mostly use "disposable peritoneal dialysis drainage devices", but peritoneal dialysis for infants and young children is different from that for adults in terms of operation details, perfusion and drainage time, perfusion and drainage volume, etc., and the current related product devices are not suitable for infants and young children.

[0003] In addition, peritoneal dialysis for infants and young children is not completed in a short period of time. The hourly peritoneal dialysis volume for infants and young children is much smaller than that for adults, and the requirements for accurate measurement are higher. It is different from the peritoneal dialysis process for adults (adults infuse 2000ml of dialysate at a time and then drain. When the drainage is completed, the dialysis is completed. The dual system can be removed and the dialysis tube in the body is closed). For infants and young children, the continuous cycle frequency is set according to the actual condition (infusion-drainage cycle every 1, 2, 3, or 4 hours). The infusion volume for each cycle is calculated based on the child's weight in kilograms, infusion (ml) = weight (Kg) * 10, which is mostly between 20-200ml. After infusing the dialysate every hour, the drainage situation must be observed to determine the dialysis effect. In principle, it is better to have a drainage volume greater than the infusion volume, so the focus is on the drainage volume being greater than the infusion volume. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a peritoneal dialysis device, which replaces the original buckle by providing a three-way valve, thereby controlling the flow of fluid in a specified direction and avoiding the problem of the user forgetting to use the buckle. At the same time, by providing an adjustable and accurately measured drainage bag, the entire device can more conveniently calculate the drainage volume, which is suitable for the peritoneal dialysis process of infants and young children.

[0005] The technical solution of the utility model is:

[0006] A peritoneal dialysis device, comprising

[0007] a three-way valve, the three-way valve comprising a valve body and a reversing switch for switching fluid flow, the valve body comprising a first end, a second end and a third end, the first end, the second end and the third end are connected through a channel, the third end is connected to a peritoneal catheter, and the closure of the channel can be controlled by adjusting the reversing switch;

[0008] A dialysis system, comprising a dialysis bag for storing dialysis fluid, wherein the dialysis bag is connected to one end of a dialysis catheter, and the dialysis catheter is in communication with the dialysis bag, and the other end of the dialysis catheter is fixedly connected to the first end;

[0009] A drainage system, the drainage system comprising a drainage bag for storing drainage fluid, the drainage bag being connected to one end of a drainage catheter, the drainage bag being in communication with the drainage catheter, and the other end of the drainage catheter being fixedly connected to the second end;

[0010] The drainage bag is a mother-and-child drainage bag, which is connected to the second end of the three-way valve through the drainage catheter. The mother-and-child drainage bag includes a mother bag located on the outer layer and a child bag for measuring the volume of drainage fluid. The child bag body is connected to the mother bag through a through hole. When the fluid volume in the child bag exceeds the capacity of the child bag, the fluid in the child bag can flow from the child bag into the mother bag through the through hole.

[0011] Preferably, the sub-bag is made of a hard transparent material, and is divided into a main chamber and a sub-chamber, and a partition is provided between the main chamber and the sub-chamber, and the partition partially separates the main chamber from the sub-chamber;

[0012] When the fluid volume of the main chamber does not exceed the set volume, the partition can prevent the fluid from entering the secondary chamber. When the fluid volume of the main chamber exceeds the set volume, the fluid will overflow from the main chamber and flow into the secondary chamber.

[0013] Preferably, scale lines are respectively provided on the surfaces of the main chamber and the sub-chamber, the scale of the main chamber increases successively from the entrance of the main chamber to the bottom of the main chamber, and is set in a gradient, and the scale of the sub-chamber increases successively from the bottom of the sub-chamber to the entrance of the sub-chamber, and is set in a gradient.

[0014] Preferably, the main chamber and the sub-chamber are respectively provided with scale lines, the scale lines of the main chamber increase from the entrance of the main chamber to the bottom of the main chamber, and are set in a gradient, and the scale lines are marked as 0-200mL, and the scale lines of the sub-chamber increase from the bottom of the sub-chamber to the entrance of the sub-chamber, and are set in a gradient, and the scale lines are marked as 0-300ml.

[0015] Preferably, a piston which can move freely along the axis direction of the main chamber is provided inside the main chamber, and the capacity of the main chamber can be adjusted by adjusting the position of the piston.

[0016] Preferably, the mother bag is made of soft material, and a valve that allows drainage fluid to flow out is provided at one end away from the drainage catheter, and the valve is connected to the mother bag. A drainage channel for allowing liquid to flow is provided inside the valve, and the drainage channel is connected to the mother bag.

[0017] Preferably, the three-way valve comprises a first state, a second state and a third state:

[0018] When the three-way valve is in the first state, the first end is connected to the third end, the second end is closed, and the third end is connected to the peritoneal catheter. At this time, the dialysate can flow from the dialysis bag through the dialysis catheter, the first end, the third end, and finally into the peritoneal catheter and into the human peritoneal cavity;

[0019] When the three-way valve is in the second state, the third end is connected to the second end, and the first end is closed. At this time, the drainage fluid in the human peritoneal cavity can flow out of the peritoneal catheter, pass through the third end and the second end, and finally flow into the drainage bag through the drainage catheter.

[0020] When the three-way valve is in a third state, the first end, the second end, and the third end are communicated with each other.

[0021] Preferably, the three-way valve is a medical three-way valve, and the dialysis catheter, the drainage catheter and the peritoneal catheter are respectively connected to the first end, the second end and the third end through threads.

[0022] Preferably, the dialysis system further comprises a drip pot for measuring the fluid flow rate and / or a flow regulator for controlling the fluid flow rate, one end of the drip pot is connected to the dialysis bag via the dialysis catheter, the other end of the drip pot is connected to the first end via the dialysis catheter, and the flow regulator is arranged on the outside of the dialysis catheter.

[0023] Preferably, the dialysis system (1) further comprises an infusion pump for accurately delivering fluid volume, wherein one end of the infusion pump is connected to the dialysis bag via the dialysis catheter, and the other end of the infusion pump is connected to the first end via the dialysis catheter.

[0024] The utility model is a peritoneal dialysis device. When in use, the dialysis system is first connected to the first end, the drainage system is connected to the second end, and the peritoneal catheter is connected to the third end. When dialysis is required, the reversing switch of the three-way valve is adjusted to make the reversing switch in the first state. At this time, the dialysate enters the peritoneal catheter through the dialysis catheter and enters the peritoneal cavity; when the dialysis is finished, the fluid in the peritoneal cavity needs to be discharged from the body, and the three-way valve is rotated at this time, and the reversing switch is adjusted to the second state. At this time, the drainage fluid of the peritoneal cavity will pass through the peritoneal catheter, the three-way valve, and the drainage catheter and enter the dialysis bag and the main chamber. The user can quickly read the drainage of the dialysate through the scale line of the main chamber. When it is necessary to extract peritoneal fluid for culture, the user rotates the three-way valve to the third state, separates the dialysis tube from the first end, and installs a heparin cap on the first end to achieve the purpose of closing the first end. At this time, the user can draw drainage fluid from the heparin cap position to perform chemical pathological analysis and guide clinical practice.

[0025] The beneficial effects achieved by the utility model are:

[0026] 1. By providing the three-way valve to replace the buckle to control the passage, the user can more conveniently control the flow direction of the liquid in the entire dialysis device, simplify the dialysis and drainage operations, avoid operational errors in clinical practice, and ensure that the dialysate will not enter the peritoneal cavity or flow out of the peritoneal cavity when the fluid passage is not successfully established;

[0027] 2. By setting up a precision-measured alphabetic drainage bag with scales, the user can accurately read the volume of drainage fluid and understand the effect of peritoneal dialysis more intuitively;

[0028] 3. By arranging the piston in the main chamber, the user can adjust the volume of the main chamber according to actual conditions, thereby increasing the application range of the entire device;

[0029] 4. The dialysis system, drainage system and peritoneal catheter are connected through a three-way valve, so that the user can replace the dialysis system or drainage system according to the clinical situation without replacing the entire system, saving resources.

[0030] 5. By setting the three-way valve, the user can easily obtain drainage fluid, avoiding excessive operations that may pollute the entire dialysis environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 The overall structural diagram of the utility model is used to show the structure of the three-way valve in a first state;

[0033] Figure 2 yes Figure 1 A magnified view of middle;

[0034] Figure 3 The overall structural diagram of the utility model is used to show the structure of the three-way valve in a second state;

[0035] Figure 4 yes Figure 3 Enlarged view of middle B;

[0036] Figure 5 The overall structural diagram of the utility model is used to show the structure of the three-way valve in a third state, at which time a household member can extract dialysate from the first end;

[0037] Figure 6 yes Figure 5 Enlarged view of middle C;

[0038] Figure 7 is a schematic diagram of the dialysis system showing the flow regulator;

[0039] Figure 8 It is a schematic diagram of the structure of the dialysis system, used to show the infusion pump;

[0040] Fig. 9 Schematic diagram of the dialysis system showing the drip pot;

[0041] Fig.10 It is a schematic diagram of the structure of the dialysis system, which is used for a structure in which a flow regulator, an infusion pump and a drip pot are arranged together;

[0042] Fig.11 It is a schematic diagram of the drainage system, used to show the sub-bag and the main bag;

[0043] Fig.12 It is a schematic diagram of the structure of the sub-bag, used to show the main chamber and the sub-chamber.

[0044] In the figure:

[0045] 1. Dialysis system;

[0046] 11. Dialysis bag; 12. Dialysis catheter; 13. Drip pot; 14. Flow regulator; 15. Infusion pump;

[0047] 2. Drainage system;

[0048] 21. Drainage bag; 22. Drainage catheter;

[0049] 211, mother bag;

[0050] 2111, valve; 2112, drainage channel;

[0051] 212. Sub-bag;

[0052] 2121, through hole; 2122, main chamber; 2123, secondary chamber; 2124, partition; 2125, piston;

[0053] 3. Three-way valve;

[0054] 31. Valve body;

[0055] 311, first end; 312, second end; 313, third end;

[0056] 32. Reversing switch;

[0057] 4. Peritoneal catheter;

[0058] 5. Human abdominal cavity. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0060] In the present invention, unless otherwise indicated or specially specified, dialysate refers to the liquid flowing out of the dialysis bag 11, and drainage fluid refers to the liquid after the dialysate has been dialyzed through the human peritoneal cavity 5. Drainage volume refers to the volume of drainage fluid entering the drainage system 2 from the human peritoneal cavity 5 through the three-way valve 3, and the infusion volume refers to the volume of liquid entering the human peritoneal cavity 5 from the dialysis system 1 through the three-way valve 3. The arrows in the attached drawings are only arrows for the flow direction of the liquid, which are only used to indicate the flow direction of the liquid under specific conditions and have no other practical meaning.

[0061] See also Figure 1 to Figure 6 The utility model provides a peritoneal dialysis device, comprising a dialysis system 1 for storing dialysis fluid, a drainage system 2 for storing drainage fluid, and a three-way valve 3 for switching the flow direction of the fluid. The dialysis system 1 is threadedly connected to the first end 311 of the three-way valve 3 through the dialysis catheter 12, that is, when the liquid in the dialysis system 1 flows, it can enter the three-way valve 3. The drainage system 2 is threadedly connected to the second end 312 of the three-way valve 3 through the drainage catheter 22, that is, when the fluid in the three-way valve 3 flows, it can enter the drainage system 2. When the three-way valve 3 is in the first state, the dialysis system 1 is connected to the human peritoneal cavity 5, and the dialysate in the dialysis system 1 can enter the human peritoneal cavity 5 through the three-way valve 3; when the three-way valve 3 is in the second state, the human peritoneal cavity 5 is connected to the drainage system 2, and the drainage fluid that has undergone dialyzation in the human peritoneal cavity 5 can enter the drainage system 2 through the three-way valve 3; when the three-way valve 3 is in the third state, the human peritoneal cavity 5, the drainage system 2 and the dialysis system 1 are connected through the three-way valve 3.

[0062] See also Figure 1 and Figure 2 , Figure 1 The schematic diagram of the structure of the three-way valve 3 in the first state is shown. At this time, the dialysate can pass through the three-way valve 3 from the dialysis system 1 and enter the abdominal cavity 5 of the human body. Figure 2 Shows yes Figure 1In the enlarged view of A in the figure, at this time, the first end 311 is connected to the third end 313, and the second end 312 is closed, so the dialysate cannot flow from the second end 312 to the drainage catheter 22. The dialysis system 1 includes a dialysis bag 11 for accommodating the dialysate and a dialysis catheter 12 for guiding the flow of the dialysate, the dialysis bag 11 is connected to one end of the dialysis catheter 12, and the other end of the dialysis catheter 12 is connected to the first end 311 of the three-way valve 3 through a threaded sealing connection. The user manually rotates the reversing switch 32 to make the three-way valve 3 in the first state, that is, the first end 311 and the third end 313 are connected. At this time, the dialysate in the dialysis bag 11 can enter the human abdominal cavity 5 from the dialysis catheter 12 through the first end 311 and the third end 313. At this time, since the second end 312 is in a closed state, the dialysate will not enter the drainage system 2.

[0063] See also Figure 3 and Figure 4 , Figure 3 The schematic diagram of the structure of the three-way valve 3 in the second state shows that the drainage fluid can enter the drainage system 2 from the human abdominal cavity 5 through the third end 313 and the second end 312 of the three-way valve 3. Figure 4 Shows yes Figure 3 In the enlarged view of B, the second end 312 is in a connected state with the third end 313, while the first end 311 is in a closed state, and the drainage fluid can only flow in the catheter connected with the second end 312 and the third end 313. After the dialysate completes dialysis in the human peritoneal cavity 5, it becomes drainage fluid and needs to be discharged to the body in time. The user can rotate the reversing switch 32 to put the three-way valve 3 in the second state, at which time the drainage fluid enters the drainage system 2 from the human peritoneal cavity 5 through the third end 313 and the second end 312.

[0064] See also Figure 5 and Figure 6 , Figure 5 3 is a schematic diagram of the structure of the three-way valve 3 in the third state. The first end 311 is sealed with a heparin cap. At this time, the user can extract the culture medium from the heparin cap installed at the first end 311. Figure 6 yes Figure 5The enlarged view of the middle C part is used to show that the three-way valve 3 is in the third state, and the first end 311 is connected to a heparin cap through a thread. When the user needs to extract the drainage fluid in the human peritoneal cavity 5 for culture, the reversing switch 32 can be manually rotated to make the three-way valve 3 in the third state. At this time, the drainage fluid in the human peritoneal cavity 5 can not only enter the drainage bag 21 normally from the human peritoneal cavity 5 through the peritoneal catheter 4, the third end 313, the second end 312, and the drainage catheter 22, but also enter the first end 313 to reach the heparin cap. The user can use a sampler inserted in the heparin cap for sampling, and the drainage fluid will not flow out naturally from the first end 311, and foreign substances will not enter the entire device, thereby avoiding contamination of the device.

[0065] See also Figures 1 to 6 In order to increase the versatility and convenience of the entire device, the three-way valve 3 uses a medical three-way valve 3, the first end 311 of the three-way valve 3 is threadedly connected to the dialysis catheter 12 through a thread, the second end 312 of the three-way valve 3 is threadedly connected to the drainage catheter 22, and the third end 313 of the three-way valve 3 is threadedly connected to the abdominal catheter 4. This threaded connection divides the entire device into multiple parts, so that the user can independently replace any component according to actual clinical needs, saving resources.

[0066] At the same time, the three-way valve 3 design is used to replace the buckle in the prior art, so that the dialysis / drainage pathways can be controlled separately, the operation of switching the dialysis / drainage pathways is simplified, and the situation in which the buckle is forgotten during clinical practice is avoided, so that even if the entire liquid pathway is unsuccessful, dialysis or drainage will not occur.

[0067] See also Figures 7 to 10 , Figure 7 is a schematic structural diagram of the dialysis system 1, used to show the flow regulator 14; Figure 8 is a schematic structural diagram of the dialysis system 1, used to show the infusion pump 15; Fig. 9 A schematic diagram of the structure of the dialysis system 1, used to show the drip pot 13; Fig.10 It is a schematic diagram of the structure of the dialysis system 1, which is a structure in which a flow regulator 14, an infusion pump 15 and a drip pot 13 are arranged together.

[0068] See also Figure 7The dialysis system 1 includes a dialysate bag 11 with scales and a dialysate catheter 12 connected to the dialysate bag 11. The dialysate in the dialysate bag 11 can flow toward the first end 311 through the dialysate catheter 12. A flow regulator 14 is disposed on the outside of the dialysate catheter 12. When the dialysate flow rate in the dialysate catheter 12 needs to be changed, the user can manually adjust the flow regulator 14 to make the dialysate flow rate in the dialysate catheter 12 reach the desired flow rate.

[0069] See also Figure 8 The dialysis system 1 includes a dialysate bag 11 with a scale, a dialysate catheter 12 connected to the dialysate bag 11, and an infusion pump 15 that provides power for the flow of dialysate. The dialysate in the dialysate bag 11 can flow to the infusion pump 15 through the dialysate catheter 12. The infusion pump 15 is located in the middle of the dialysate catheter 12, and both ends are connected to the dialysate catheter 12. By providing the infusion pump 15, the dialysate in the dialysate catheter 12 can be delivered to the first end 311 with a precise volume to meet the clinical demand for the precise volume of dialysate.

[0070] See also Fig. 9 The dialysis system 1 includes a dialysis bag 11 with scales, a dialysis catheter 12 connected to the dialysis bag 11, and a drip pot 13 for observing the flow rate of the liquid. The drip pot 13 is located in the middle of the dialysis catheter 12, and both ends are sealed and connected to the dialysis catheter 12. The dialysate in the dialysis catheter 12 can flow toward the first end 311 through the drip pot 13. The user can roughly judge the flow rate of the dialysis liquid by the dripping speed of the dialysis liquid in the drip pot 13.

[0071] See also Fig.10 The dialysis system 1 includes a dialysis bag 11 with a scale, a dialysis catheter 12 connected to the dialysis bag 11, a drip pot 13 for observing the liquid flow rate, a flow regulator 14 for adjusting the liquid flow rate and an infusion pump 15 for precise infusion. The drip pot 13 is located in the middle of the dialysis catheter 12, and both ends of the drip pot 13 are sealed and connected to the dialysis catheter 12. The flow regulator 14 is provided on the outside of the dialysis catheter 12. By setting the flow regulator 14, the flow rate of the dialysate in the dialysis catheter 12 can be controlled. By setting the infusion pump 15, the flow rate of the dialysate in the dialysis catheter 12 can be accurately controlled to meet the purpose of accurate calculation of the liquid volume in clinical practice.

[0072] It should be noted that the dripping pot 13, flow regulator 14 and infusion pump 15 are optional settings, and only one, two or three of them can be set, such as only the dripping pot 13, only the infusion pump 15 or only the flow regulator 14, or only the dripping pot 13 and the infusion pump 15, only the dripping pot 13 and the flow regulator 14, and so on.

[0073] See also Fig.11 and Fig.12 , Fig.11 is a schematic diagram of the structure of the drainage system 2; Fig.12 yes Fig.11 The schematic diagram of the structure of the sub-bag 212 is used to show the structure of the sub-bag 212. Fig.11 The drainage system 2 includes a drainage catheter 22 and a drainage bag 21. One end of the drainage catheter 22 is connected to the drainage bag 21, and the drainage catheter 22 is communicated with the inside of the drainage bag 21, so that the drainage fluid in the drainage catheter 22 can enter the drainage bag 21. The other end of the drainage catheter 22 is threadedly connected to the second end 312. The drainage bag 21 includes a mother bag 211 and a child bag 212. The child bag 212 is located in the mother bag 211, and the child bag 212 is communicated with the drainage catheter 22. The mother bag 211 is sealed and connected to the outer wall of the drainage catheter 22, and the two are not directly connected.

[0074] It should be noted that the mother bag 211 is made of soft material, and is provided with a drainage channel 2112 at one end away from the drainage catheter 22, through which the drainage fluid in the mother bag 211 can flow out of the mother bag 211. In order to control the drainage fluid in the drainage channel 2112 to flow out of the mother bag 211, a valve 2111 is provided on the drainage channel 2112. The opening and closing of the drainage channel 2112 can be controlled by controlling the valve 2111. The sub-bag 212 is made of hard transparent material, and includes a main chamber 2122 and a sub-chamber 2123 for accommodating drainage fluid. A partition 2124 is provided between the main chamber 2122 and the sub-chamber 2123, and the partition 2124 can partially separate the main chamber 2122 and the sub-chamber 2123 to prevent the drainage fluid from flowing freely between the two. Only when the drainage liquid level in the main chamber 2122 is higher than the height of the partition 2124, the drainage liquid in the main chamber 2122 can overflow from the partition 2124 and enter the sub-chamber 2123. The outer wall of the sub-bag 212 is provided with a through hole 2121 connected to the mother bag 211. When the drainage liquid level in the sub-bag 212 exceeds the height of the through hole 2121, the drainage liquid in the sub-bag 212 can enter the mother bag 211 through the through hole 2121. When the three-way valve 3 is in the second state or the third state, the drainage fluid in the human peritoneal cavity 5 can enter the drainage system 2 through the peritoneal catheter 4, the third end 313, and the second end 312. At this time, the drainage fluid in the drainage catheter 22 first enters the sub-bag 212. When the drainage fluid in the sub-bag 212 exceeds the specified volume, the drainage fluid in the sub-bag 212 can enter the mother bag 211 through the through hole 2121 at the upper end of the sub-bag 212.

[0075] It should be noted that when the liquid in the main chamber 2122 exceeds the set volume, it will first overflow from the partition 2124 and flow into the sub-chamber 2123. When the main chamber 2122 and the sub-chamber 2123 are both filled with liquid and the liquid level continues to rise and contacts the through hole 2121, the liquid in the sub-bag 212 will pass through the through hole 2121 and flow into the mother bag 211.

[0076] See also Fig.12The main chamber 2122 of the sub-bag 212 includes scale lines arranged in a gradient from the entrance of the main chamber 2122 to the bottom of the main chamber 2122, and the sub-chamber 2123 includes scale lines arranged in a gradient from the bottom of the sub-chamber 2123 to the entrance of the sub-chamber 2123. Preferably, the scale lines of the main chamber 2122 are arranged from the entrance of the main chamber 2122 to the bottom of the main chamber 2122, and the scales are from 0 to 200 ml, that is, the scale of the entrance of the main chamber 2122 is 0 ml, and the scale of the bottom of the main chamber 2122 is 200 ml, and the scale lines are evenly arranged. The scale lines of the sub-chamber 2123 are 0 to 300 ml, and are arranged from the bottom of the sub-chamber 2123 to the entrance of the sub-chamber 2123, that is, the scale of the bottom of the sub-chamber 2123 is 0 ml, and the scale of the entrance of the sub-chamber 2123 is 300 ml, and the scale lines are evenly arranged.

[0077] See also Fig.12 , the main chamber 2122 is provided with a piston 2125 that can move along the axis direction of the main chamber 2122, and the position of the piston 2125 can be adjusted to a suitable position according to actual needs. If the amount of dialysate entering the human peritoneal cavity 5 is 100ml, in order to achieve a good dialysis effect, the amount of liquid entering the drainage bag 21 from the human peritoneal cavity 5 should also be not less than 100ml. At this time, the piston 2125 can be moved to 100ml. After a period of time, if the drainage exceeds 100ml, the main chamber 2122 can no longer accommodate all the liquid, and the excess liquid will overflow from the partition 2124 and enter the sub-chamber 2123. Since the scale line in the sub-chamber 2123 is set from the bottom of the sub-chamber 2123 to the entrance of the sub-chamber 2123, the patient or user can directly read the liquid volume in the sub-chamber 2123 without complicated calculations, and the effect of peritoneal dialysis in the past period of time can be obtained. It is also possible to qualitatively determine that the drainage volume is greater than the infusion volume by observing that there is liquid in the sub-chamber 2123 .

[0078] If the drainage is less than 100 ml, all the drainage fluid will enter the main chamber 2122. Since the scale line in the main chamber 2122 is set from the entrance of the main chamber 2122 to the main chamber 2123, the user can directly read the free volume in the main chamber 2122, and then subtract the value from 100, and can also quickly get the effect of peritoneal dialysis in the past period of time. Therefore, the whole device can more intuitively understand the effect of membrane dialysis.

[0079] If the drainage volume exceeds the volume of the sub-bag 212 , the drainage fluid will pass through the through hole 2121 and enter the main bag 211 .

[0080] When a peritoneal dialysis device of the utility model is working, the position of the piston 2125 is adjusted according to the dialysis amount each time, and then the reversing switch 32 is rotated to put the three-way valve 3 in the first state, at which time the dialysate can enter the human peritoneal cavity 5 from the dialysis bag 11 through the dialysis catheter 12, the first end 311, the third end 313, and the peritoneal catheter 4. After a period of peritoneal dialysis, the reversing switch 32 is rotated to the second state, at which time the drainage fluid in the peritoneal cavity can pass through the peritoneal catheter 4, the third end 313, the second end 312, the drainage catheter 22, enters the drainage bag 21. The liquid entering the drainage bag 21 first enters the main chamber 2122. If the main chamber 2122 cannot completely accommodate the drainage liquid, the liquid will overflow from the partition 2124 and enter the sub-chamber 2123. At this time, the liquid volume of the main chamber 2122 plus the liquid volume of the sub-chamber 2123 is the liquid dialysis volume of this time period; if the main chamber 2122 can accommodate the drainage liquid, the volume of the free area at the upper end of the main chamber 2122 can be read. The preset volume of the main chamber minus the free volume is the volume of the drainage liquid. It is also possible to qualitatively determine whether the drainage volume is greater than the infusion volume by whether there is free space in the main chamber or whether there is liquid in the sub-chamber. When it is necessary to sample the dialysate in the peritoneal cavity, the dialysis catheter 12 is disconnected from the first end 311, and the first end 311 is connected to a heparin cap, and the reversing switch 32 is manually rotated to put the three-way valve 3 in the third state. At this time, the first end 311 is sealed and connected to a heparin cap through a thread, and the user can use a sampler to sample from the heparin cap without contaminating the internal liquid.

[0081] In summary, the utility model has the following beneficial effects:

[0082] 1. By providing the three-way valve 3 to replace the buckle to control the passage, the user can more conveniently control the flow direction of the liquid in the entire dialysis device, simplify the dialysis and drainage operations, avoid operational errors in clinical practice, and ensure that the dialysate will not enter the peritoneal cavity or flow out of the peritoneal cavity when the fluid passage is not successfully established;

[0083] 2. By providing a drainage bag 21 with a precise scale and letters, the user can accurately read the volume of the drainage fluid and understand the peritoneal dialysis effect more intuitively;

[0084] 3. By arranging the piston 2125 in the main chamber 2122, the user can adjust the volume of the main chamber 2122 according to actual conditions, thereby increasing the application range of the entire device;

[0085] 4. The three-way valve 3 is connected to the dialysis system 1, the drainage system 2 and the peritoneal catheter 4 in a threaded manner, so that the user can replace the dialysis system 1 or the drainage system 2 according to the clinical situation without replacing the entire system, thus saving resources.

[0086] 5. By providing the three-way valve 3, the user can easily obtain peritoneal fluid, avoiding excessive operations that may pollute the entire dialysis environment.

[0087] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of this application and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A peritoneal dialysis device, characterized in that: include A three-way valve (3), the three-way valve (3) comprising a valve body (31) and a reversing switch (32) for switching the flow of a fluid, the valve body (31) comprising a first end (311), a second end (312) and a third end (313), the first end (311), the second end (312) and the third end (313) being connected via a channel, the third end (313) being connected to a peritoneal catheter (4), and the closure of the channel can be controlled by adjusting the reversing switch (32); A dialysis system (1), the dialysis system (1) comprising a dialysis bag (11) for storing dialysis fluid, the dialysis bag (11) being connected to one end of a dialysis catheter (12), the dialysis catheter (12) being in communication with the dialysis bag (11), and the other end of the dialysis catheter (12) being fixedly connected to the first end (311); A drainage system (2), the drainage system (2) comprising a drainage bag (21) for storing drainage fluid, the drainage bag (21) being connected to one end of a drainage catheter (22), the drainage bag (21) being in communication with the drainage catheter (22), and the other end of the drainage catheter (22) being fixedly connected to the second end (312); The drainage bag (21) is a mother-and-child drainage bag (21), and the mother-and-child drainage bag (21) is connected to the second end (312) of the three-way valve (3) through the drainage catheter (22). The mother-and-child drainage bag (21) comprises a mother bag (211) located on the outer layer and a child bag (212) for measuring the volume of drainage fluid. The body of the child bag (212) is connected to the mother bag (211) through a through hole (2121). When the volume of fluid in the child bag (212) exceeds the capacity of the child bag (212), the fluid in the child bag (212) can flow from the child bag (212) into the mother bag (211) through the through hole (2121).

2. A peritoneal dialysis device according to claim 1, characterized in that: The sub-bag (212) is made of a hard transparent material and is divided into a main chamber (2122) and a sub-chamber (2123). A partition (2124) is provided between the main chamber (2122) and the sub-chamber (2123). The partition (2124) partially separates the main chamber (2122) from the sub-chamber (2123). When the fluid volume of the main chamber (2122) does not exceed the set volume, the partition (2124) can prevent the fluid from entering the sub-chamber (2123). When the fluid volume of the main chamber (2122) exceeds the set volume, the fluid will overflow from the main chamber (2122) and flow into the sub-chamber (2123).

3. A peritoneal dialysis device according to claim 2, characterized in that: Scale lines are respectively provided on the surfaces of the main chamber (2122) and the sub-chamber (2123); the scale lines of the main chamber (2122) increase in sequence from the entrance of the main chamber (2122) to the bottom of the main chamber (2122) and are arranged in a gradient; the scale lines of the sub-chamber (2123) increase in sequence from the bottom of the sub-chamber (2123) to the entrance of the sub-chamber (2123) and are arranged in a gradient.

4. A peritoneal dialysis device according to claim 3, characterized in that: The main chamber (2122) and the sub-chamber (2123) are respectively provided with scale lines. The scale lines of the main chamber (2122) increase from the entrance of the main chamber (2122) to the bottom of the main chamber (2122) in a gradient setting, and the scale lines are marked as 0-200mL. The scale lines of the sub-chamber (2123) increase from the bottom of the sub-chamber (2123) to the entrance of the sub-chamber (2123), and the scale lines are set in a gradient setting, and the scale lines are marked as 0-300ml.

5. A peritoneal dialysis device according to claim 4, characterized in that: A piston (2125) is provided inside the main chamber (2122) and can move freely along the axis direction of the main chamber (2122). The capacity of the main chamber (2122) can be adjusted by adjusting the position of the piston (2125).

6. A peritoneal dialysis device according to claim 1, characterized in that: The mother bag (211) is made of soft material, and is provided with a valve (2111) at one end away from the drainage catheter (22) for allowing drainage fluid to flow out, and the valve (2111) is connected to the mother bag (211), and a drainage channel (2112) for allowing liquid to flow is provided inside the valve (2111), and the drainage channel (2112) is connected to the mother bag (211).

7. A peritoneal dialysis device according to any one of claims 1 to 6, characterized in that: The three-way valve (3) comprises at least a first state, a second state and a third state: When the three-way valve (3) is in the first state, the first end (311) and the third end (313) are in communication, the second end (312) is closed, and the third end (313) is connected to the peritoneal catheter (4). At this time, the dialysate can flow from the dialysis bag (11) through the dialysis catheter (12), the first end (311), and the third end (313), and finally flow into the peritoneal catheter (4) and enter the human peritoneal cavity (5); When the three-way valve (3) is in the second state, the third end (313) is connected to the second end (312), and the first end (311) is closed. At this time, the drainage fluid in the human abdominal cavity (5) can flow out of the abdominal cavity catheter (4), pass through the third end (313), the second end (312), and finally flow into the drainage bag (21) through the drainage catheter (22); When the three-way valve (3) is in the third state, the first end (311), the second end (312) and the third end (313) are in communication with each other.

8. A peritoneal dialysis device according to claim 7, characterized in that: The three-way valve (3) is a medical three-way valve (3), and the dialysis catheter (12), the drainage catheter (22) and the peritoneal catheter (4) are respectively connected to the first end (311), the second end (312) and the third end (313) through threads.

9. A peritoneal dialysis device according to claim 1, characterized in that: The dialysis system (1) further comprises a drip pot (13) for measuring the fluid flow rate and / or a flow regulator (14) for controlling the fluid flow rate. One end of the drip pot (13) is connected to the dialysis bag (11) via the dialysis catheter (12), and the other end of the drip pot (13) is connected to the first end (311) via the dialysis catheter (12). The flow regulator (14) is arranged on the outside of the dialysis catheter (12).

10. A peritoneal dialysis device according to claim 1 or 9, characterized in that: The dialysis system (1) further comprises an infusion pump (15) for accurately delivering fluid volume, wherein one end of the infusion pump (15) is connected to the dialysis bag (11) via the dialysis catheter (12), and the other end of the infusion pump (15) is connected to the first end (311) via the dialysis catheter (12).

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