A device for sampling and mixing peritoneal dialysis solution

Abstract

The utility model provides a kind of peritoneal dialysis solution fractionation sampling mixing device, comprising: several ration cabin, each ration cabin is connected with extraction mechanism;Mixing cabin, each ration cabin is communicated with mixing cabin, the communication of each ration cabin and mixing cabin is provided with first switch mechanism, and mixing mechanism is provided in mixing cabin. The device is integrated multiple sampling, after single sampling, sample is stored in the device until mixing is stored finally, avoid multiple shuffling leading to sample pollution affecting detection accuracy, at the same time, the device completes multiple sampling alone, avoid the problem that sample is stored in order after each sampling, integrated device can store sample after each sampling, peritoneal dialysis bag can be handled after each sampling is completed, avoid multiple peritoneal dialysis bag stacking, operation is more simple and orderly, reduce the work burden of medical staff, reduce the possibility of work failure.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a device for fractional sampling and mixing of peritoneal dialysis fluid. Background Technology

[0002] Peritoneal dialysis uses the peritoneum as a semipermeable membrane, where water and solutes are exchanged between the peritoneal capillaries and the dialysate. Electrolytes and small molecules move from the side with higher concentration to the side with lower concentration, while water molecules move from the side with lower osmotic concentration to the side with higher osmotic concentration. Increasing the concentration of the dialysate can remove water from the body. The solute concentration gradient can also remove uremic substances from the blood through the dialysate and maintain electrolyte and acid-base balance, thus replacing some of the functions of the kidneys.

[0003] Currently, peritoneal dialysis patients need to have their peritoneal dialysis fluid samples collected regularly over 24 hours (3-5 bags of dialysis fluid mixed before collection, approximately 2000ml per bag). Clinical testing requires collecting a representative sample from the total daily volume and mixing it thoroughly. Currently, clinical sampling involves manually drawing 10ml from each bag of fluid, requiring opening and closing the sampling port each time, which easily introduces contamination. Manually mixing the samples multiple times can generate air bubbles or result in incomplete mixing, affecting testing accuracy. This necessitates repeated procedures for medical staff, increasing their workload.

[0004] How to provide a device for automatically mixing and simplifying the sampling procedure of peritoneal dialysis fluid for multiple sampling is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a device for sampling and mixing peritoneal dialysis fluid in stages, so as to solve at least one of the above-mentioned technical problems.

[0006] To solve the above-mentioned technical problems, this utility model provides a fractional sampling and mixing device for peritoneal dialysis fluid, comprising: a plurality of quantitative chambers, each of which is connected to an extraction mechanism; a mixing chamber, each of the quantitative chambers being connected to the mixing chamber, a first switching mechanism being provided at the connection between each of the quantitative chambers and the mixing chamber, and a mixing mechanism being provided inside the mixing chamber; and a storage chamber, which is detachably connected to the mixing chamber and is connected to the mixing chamber, a second switching mechanism being provided at the connection between the storage chamber and the mixing chamber, and an outlet being provided on the storage chamber.

[0007] Optionally, there are five metering chambers, the cross-sections of the five metering chambers are equally divided into circles, and the five metering chambers together form a complete cylinder; the mixing chamber is a cylinder adapted to the cylindrical shape formed by the five metering chambers, and the mixing chamber is connected below the five metering chambers; the storage chamber is a cylinder adapted to the mixing chamber, and the storage chamber is detachably connected below the mixing chamber.

[0008] Optionally, the extraction mechanism includes: a tail needle, an injection port on the top of the metering chamber, a rubber membrane on the injection port, all five metering chambers being vacuum chambers, and the tail needle piercing the rubber membrane to connect them; a connecting hose, one end of which is connected to the tail needle; and an aspiration needle, which is connected to the other end of the connecting hose.

[0009] Optionally, the injection port is provided with a threaded edge, and a threaded cap can be detachably installed on the threaded edge.

[0010] Optionally, each of the metering chambers is provided with an inflow channel leading to the mixing chamber at its bottom, and the first switching mechanism includes five first shut-off valves, which respectively control the five inflow channels.

[0011] Optionally, the mixing mechanism includes: a motor installed at the bottom of the mixing chamber with its output end facing the interior of the mixing chamber; and a stirring paddle installed at the output end of the motor.

[0012] Optionally, the bottom of the mixing chamber has a hole, and the top of the storage chamber has a hole corresponding to the hole at the bottom of the mixing chamber; the bottom of the mixing chamber and the top of the storage chamber are provided with matching male and female stops; the bottom of the mixing chamber is provided with a plurality of positioning pins; the top of the storage chamber is provided with positioning holes that match the positioning pins; and the sides of the mixing chamber and the storage chamber are provided with latches; the second switching mechanism includes a second shut-off valve, which is located at the hole at the bottom of the storage chamber.

[0013] Optionally, a filter screen is provided at the holes at the bottom of the mixing chamber.

[0014] Optionally, the volumetric chamber has a capacity of not less than 10 ml.

[0015] Optionally, the metering chamber, the mixing chamber, and the storage chamber are all made of medical-grade polycarbonate.

[0016] Beneficial effects:

[0017] This invention provides a fractional sampling and mixing device for peritoneal dialysis fluid. Peritoneal dialysis fluid needs to be sampled approximately every three months for a 24-hour period. A patient typically produces 3-5 bags of peritoneal dialysis fluid within 24 hours. Sampling requires mixing each bag before testing. When sampling and testing are required, the device is used. For each bag of peritoneal dialysis completed within a day, 10ml of dialysis fluid is drawn from the bag using a suction mechanism and injected into a quantitative chamber. After sampling multiple bags of peritoneal dialysis fluid over 24 hours, the first switch mechanism connecting each quantitative chamber to the mixing chamber is opened, allowing samples from multiple quantitative chambers to flow into the mixing chamber. The mixing mechanism of the mixing chamber is then opened to mix the samples from multiple quantitative chambers. Finally, the second switch mechanism connecting the mixing chamber to the storage chamber is opened, allowing the mixed sample to flow into the storage chamber. The storage chamber is then removed from the mixing chamber. If it cannot be sent for testing immediately, the storage chamber can be placed in a cold storage room. For testing, the sample is poured out from the outlet. This device integrates multiple sampling. After each sampling, the sample is stored inside the device until it is thoroughly mixed before final storage, avoiding sample contamination caused by repeated handling and affecting the accuracy of the test. At the same time, the device completes multiple samplings independently, avoiding the problem of orderly storage of samples after each sampling. The integrated device can store samples after each sampling, and the peritoneal dialysis bag can be disposed of immediately after each sampling, avoiding the stacking of multiple peritoneal dialysis bags. The operation is simpler and more orderly, reducing the workload of medical staff and reducing the possibility of work errors.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the cross-sectional elevation structure provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the elevation structure provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the elevation structure of the storage compartment during disassembly, as provided in an embodiment of this application.

[0023] Figure label:

[0024] 1. Quantitative chamber; 11. Extraction mechanism; 111. Tail needle; 112. Rubber diaphragm; 113. Connecting hose; 114. Suction needle; 12. Threaded edge; 13. Threaded cap;

[0025] 2. Mixing chamber; 21. First switching mechanism; 211. First shut-off valve; 22. Mixing mechanism; 221. Motor; 222. Agitator;

[0026] 3. Storage compartment; 31. Second switching mechanism; 311. Second shut-off valve; 32. Liquid outlet; 33. Male and female stop valves; 34. Positioning pin; 35. Fastener. Detailed Implementation

[0027] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this specification are within the protection scope of this utility model.

[0028] Furthermore, in the embodiments of this specification, when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component present. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intervening component present.

[0029] Please see Figure 1-3 This embodiment provides a peritoneal dialysis fluid sampling and mixing device, which includes: a plurality of quantitative chambers 1, each quantitative chamber 1 being connected to an extraction mechanism 11; a mixing chamber 2, each quantitative chamber 1 being connected to the mixing chamber 2, each quantitative chamber 1 and the mixing chamber 2 being provided with a first switching mechanism 21 at the connection point, and the mixing chamber 2 being provided with a mixing mechanism 22; a storage chamber 3, the storage chamber 3 being detachably connected to the mixing chamber 2, the storage chamber 3 being connected to the mixing chamber 2, the storage chamber 3 being provided with a second switching mechanism 31 at the connection point, and the storage chamber 3 being provided with an outlet 32.

[0030] Specifically, peritoneal dialysis fluid needs to be sampled approximately every three months for a 24-hour period. A patient typically produces 3-5 bags of peritoneal dialysis fluid within 24 hours. Sampling requires mixing samples from each bag before testing. When sampling is required, this device is used. For each bag of peritoneal dialysis completed within a day, 10ml of dialysis fluid is drawn from the bag using the suction mechanism and injected into a quantitative chamber 1. After sampling from multiple bags of peritoneal dialysis fluid over 24 hours, each chamber 1 is opened. The first switching mechanism 21 of the volumetric chamber 1, connected to the mixing chamber 2, allows samples from multiple volumetric chambers 1 to flow into the mixing chamber 2. The mixing mechanism 22 of the mixing chamber 2 is then opened to mix the samples from the multiple volumetric chambers 1. Afterwards, the second switching mechanism 31 connecting the mixing chamber 2 to the storage chamber 3 is opened, allowing the mixed samples to flow into the storage chamber 3. The storage chamber 3 is then removed from the mixing chamber 2. If samples cannot be sent for testing immediately, the storage chamber 3 can be placed in a cold storage room for refrigeration. When testing is required, the samples can be poured out from the outlet 32. This device integrates multiple sampling. After each sampling, the sample is stored inside the device until it is mixed and stored, avoiding sample contamination from repeated handling that could affect testing accuracy. Simultaneously, the device independently completes multiple samplings, avoiding the problem of orderly sample storage after each sampling. The integrated device allows for sample storage after each sampling, and the peritoneal dialysis bags can be disposed of immediately after each sampling, avoiding the stacking of multiple peritoneal dialysis bags. This simplifies and streamlines the operation, reduces the workload of medical staff, and minimizes the possibility of errors.

[0031] In some possible implementations, there are five metering chambers 1, the cross-sections of the five metering chambers 1 are equally divided into circles, and the five metering chambers 1 together form a complete cylinder; the mixing chamber 2 is a cylinder adapted to the cylindrical shape formed by the five metering chambers 1 together, and the mixing chamber 2 is connected below the five metering chambers 1; the storage chamber 3 is a cylinder adapted to the mixing chamber 2, and the storage chamber 3 is detachably connected below the mixing chamber 2.

[0032] Specifically, a maximum of five dialysis bags can be dialyzed in 24 hours. The five quantitative chambers 1 are all 72-degree sector-shaped, and the five quantitative chambers 1 together form a cylinder. The mixing chamber 2 and storage chamber 3 below are cylinders with circular cross-sections. The five quantitative chambers 1, mixing chamber 2 and storage chamber 3 form a cylinder, making the whole device easier to store and carry.

[0033] In some possible implementations, the extraction mechanism 11 includes: a tail needle 111, an injection port on the top of the metering chamber 1, a rubber membrane 112 on the injection port, all five metering chambers 1 being vacuum chambers, and the tail needle 111 piercing the rubber membrane 112 to connect them; a connecting hose 113, one end of which is connected to the tail needle 111; and an aspiration needle 114, which is connected to the other end of the connecting hose 113.

[0034] Specifically, the quantitative chamber 1 is in a vacuum state when not in use and is sealed by the rubber membrane 112 on the injection port. When sampling is required, the aspiration needle 114 is first inserted into the peritoneal dialysis bag, and then the tail needle 111 is inserted into the rubber membrane 112. The quantitative chamber 1 is in a vacuum state and is connected to the peritoneal dialysis bag through the tail needle 111, the connecting tubing 113, and the aspiration needle 114. Atmospheric pressure generates pressure on the dialysate, and the vacuum quantitative chamber 1 draws the dialysate from the peritoneal dialysis bag into the quantitative chamber 1 through the extraction mechanism 11. When the atmospheric pressure is insufficient to fill the quantitative chamber 1, medical staff can also assist in sampling by pressing the peritoneal dialysis bag. The extraction mechanism 11 performs sampling based on atmospheric pressure, which is the same as the principle of venous blood collection. It has a simple structure and is easy to use.

[0035] In some possible implementations, a threaded flange 12 is provided on the injection port, and a threaded cap 13 is detachably installed on the threaded flange 12. Each metering chamber 1 has an inflow channel leading to the mixing chamber 2 at its bottom. The first switching mechanism 21 includes five first shut-off valves 211, which control the five inflow channels respectively.

[0036] Specifically, before and after sampling, the quantitative chamber 1 can be sealed by covering the threaded opening 12 with the threaded cap 13 to prevent accidental rupture of the rubber membrane 112 before use or entry of airborne contaminants into the quantitative chamber 1 through the puncture holes on the rubber membrane 112 after sampling, thus preventing damage to the sample. After all or part of the sampling in the five quantitative chambers 1 is completed, the first shut-off valve 211 in the sampled quantitative chamber 1 is opened, and the sample in the quantitative chamber 1 flows into the mixing chamber 2, where it is mixed and stirred.

[0037] In some possible implementations, the mixing mechanism 22 includes: a motor 221, which is mounted at the bottom of the mixing chamber 2 and has its output end facing the interior of the mixing chamber 2; and a stirring paddle 222, which is mounted at the output end of the motor 221.

[0038] Specifically, the motor 221 controls the stirring paddle 222 to rotate and mix the sample in the mixing chamber 2. A battery can be installed at the bottom of the mixing chamber 2 to power the motor 221. The stirring paddle 222 only needs to be used a few times, and the battery capacity is sufficient to meet the requirements.

[0039] In some possible implementations, the bottom of the mixing chamber 2 has a hole, and the top of the storage chamber 3 has a corresponding hole. The bottom of the mixing chamber 2 and the top of the storage chamber 3 are provided with matching male and female stops 33. The bottom of the mixing chamber 2 is provided with several positioning pins 34, and the top of the storage chamber 3 is provided with positioning holes that match the positioning pins 34. Fasteners 35 are provided on the sides of the mixing chamber 2 and the storage chamber 3. The second switching mechanism 31 includes a second shut-off valve 311, which is located at the hole at the bottom of the storage chamber 3. A filter screen is provided at the hole at the bottom of the mixing chamber 2.

[0040] Specifically, the storage chamber 3 is positioned by the positioning pin 34 and the mixing chamber 2, aligning the hole at the bottom of the mixing chamber 2 with the hole in the storage chamber 3. Leak-proof rubber or similar material can be installed at the joint between the two holes. The male and female stop valves 33 and the latch 35 simultaneously limit the positions of the storage chamber 3 and the mixing chamber 2. The second shut-off valve 311 controls the flow of the sample from the mixing chamber 2 into the storage chamber 3. The second shut-off valve 311 is located at the hole in the storage chamber 3. After the sample flows into the storage chamber 3, the second shut-off valve 311 is closed, and the latch 35 is opened. 5. The storage chamber 3 can be disassembled for storage. Each storage chamber 3 is small in size and easy to store. When the sample flows into the mixing chamber 2, a small amount of sample may flow into the bottom hole of the mixing chamber 2. When the stirring paddle 222 of the mixing chamber 2 rotates, it cannot agitate the small amount of liquid in the hole. Because the hole is small, the small amount of sample will not affect the overall mixing degree of the sample. The hole at the top of the storage chamber 3 is the outlet 32. During sampling and testing, the second shut-off valve 311 is opened, and the sample can be poured out through the hole. The filter screen in the bottom hole of the mixing chamber 2 can perform preliminary filtration of the sample.

[0041] In some possible implementations, the volumetric chamber 1 has a capacity of not less than 10 ml. The volumetric chamber 1, the mixing chamber 2, and the storage chamber 3 are all made of medical-grade polycarbonate.

[0042] Specifically, the dialysate may be lost or leaked as it passes through the extraction mechanism 11, the quantitative chamber 1, the mixing chamber 2, and the storage chamber 3. The quantitative chamber 1 has a volume greater than 10ml to ensure sufficient sample volume. It is made of medical-grade polycarbonate material and is relatively lightweight.

[0043] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. All should be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

[0044] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A device for sampling and mixing peritoneal dialysis fluid, characterized in that, include: Several quantitative chambers (1), each of which is connected to an extraction mechanism (11); The mixing chamber (2) is connected to each of the quantitative chambers (1). A first switching mechanism (21) is provided at the connection between each quantitative chamber (1) and the mixing chamber (2). A mixing mechanism (22) is provided inside the mixing chamber (2). Storage chamber (3) is detachably connected to mixing chamber (2). Storage chamber (3) is connected to mixing chamber (2). A second switching mechanism (31) is provided at the connection between storage chamber (3) and mixing chamber (2). Liquid outlet (32) is provided on storage chamber (3).

2. The device for fractional sampling and mixing of peritoneal dialysis fluid according to claim 1, characterized in that: There are five quantitative chambers (1), and the cross-sections of the five quantitative chambers (1) are equally divided into circles. When the five quantitative chambers (1) are enclosed together, they form a complete cylinder. The mixing chamber (2) is a cylindrical shape adapted to the cylindrical shape of the five quantitative chambers (1), and the mixing chamber (2) is connected below the five quantitative chambers (1); The storage chamber (3) is cylindrical and adapted to the mixing chamber (2). The storage chamber (3) is detachably connected to the lower part of the mixing chamber (2).

3. The device for sampling and mixing peritoneal dialysis solution according to claim 2, wherein, The extraction mechanism (11) includes: Tail needle (111), the top of the metering chamber (1) is provided with a liquid injection port, the liquid injection port is provided with a rubber membrane (112), the five metering chambers (1) are all vacuum chambers, and the tail needle (111) pierces the rubber membrane (112) to connect them; A connecting hose (113) is provided, one end of which is connected to the tail pin (111); A suction needle (114) is connected to the other end of the connecting hose (113).

4. The device for fractional sampling and mixing of peritoneal dialysis fluid according to claim 3, characterized in that: The injection port is provided with a threaded edge (12), and a threaded cap (13) can be detachably installed on the threaded edge (12).

5. The peritoneal dialysis fluid sampling and mixing device according to claim 4, characterized in that: Each of the quantitative chambers (1) is provided with an inflow channel leading to the mixing chamber (2) at its bottom. The first switching mechanism (21) includes five first shut-off valves (211), which control the five inflow channels respectively.

6. The peritoneal dialysis fluid sampling and mixing device according to claim 5, characterized in that, The mixing mechanism (22) includes: A motor (221) is installed at the bottom of the mixing chamber (2), with the output end of the motor (221) facing the interior of the mixing chamber (2); A stirring paddle (222) is mounted on the output end of the motor (221).

7. The peritoneal dialysis fluid sampling and mixing device according to claim 6, characterized in that: The bottom of the mixing chamber (2) is provided with holes, and the top of the storage chamber (3) is provided with holes corresponding to the holes at the bottom of the mixing chamber (2). The bottom of the mixing chamber (2) and the top of the storage chamber (3) are provided with matching male and female stops (33). The bottom of the mixing chamber (2) is provided with a plurality of positioning pins (34). The top of the storage chamber (3) is provided with positioning holes that are compatible with the positioning pins (34). The sides of the mixing chamber (2) and the sides of the storage chamber (3) are provided with buckles (35). The second switching mechanism (31) includes a second shut-off valve (311), which is disposed at a hole opened at the bottom of the storage compartment (3).

8. The device for sampling and mixing peritoneal dialysis solution in several portions according to claim 7, characterized in that: A filter screen is installed at the holes at the bottom of the mixing chamber (2).

9. The device for sampling and mixing peritoneal dialysis solution in several portions according to claim 8, characterized in that: The capacity of the quantitative chamber (1) is not less than 10 ml.

10. The device for sampling and mixing peritoneal dialysis solution in several portions according to claim 9, characterized in that: The quantitative chamber (1), the mixing chamber (2), and the storage chamber (3) are all made of medical-grade polycarbonate.

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