JPH0563549U - Device for preparing and storing dialysate - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a dialysate mixing / storing device which prevents bacteria from propagating in a drainage pipe and prevents bacteria from entering the dialysate mixing / storage tank from the drainage pipe. A constitution is provided with a preparation storage tank 2 for preparing and / or storing a dialysate for artificial dialysis treatment, and a wash water pipe 8 connected to a drain pipe 6 from the preparation storage tank 2 immediately downstream of a drainage on-off valve 7. A flow rate controller for adjusting the flow rate of the wash water flowing through the wash water pipe 8, for example, a solenoid valve 9 for flowing the wash water by repeatedly opening and closing at a fixed time interval while the drainage on-off valve 7 is closed is provided. A dialysate preparation and storage device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides a dialysate equipped with a blending tank for preparing a dialysate used for artificial dialysis treatment, a reservoir for storing the dialysate and supplying it to a dialysis apparatus, or a blending / reservoir tank having both functions. Mixing / storing device.

[0002]

[Prior Art]

 The dialysate comes into contact with blood through the semipermeable membrane in the dialyzer of the dialysis machine, and the urine toxins and the like accumulated in the blood are exchanged with substances such as acetic acid and bicarbonate in the dialysate through the semipermeable membrane. It Therefore, the presence of bacteria or the like in the dialysate causes a problem in the patient, and therefore the dialysate must always be protected from the propagation of bacteria and the like.

For example, a dialyzer of a dialysis machine is sterilized by various methods for each dialysis treatment. When preparing and storing dialysate, the mixing tank, storage tank, and mixing / storage tank (hereinafter collectively referred to as the mixing storage tank) should be emptied of the interior periodically and used sodium chloride. There is also a device that is sterilized by sterilization and is constantly illuminated by a germicidal lamp.

However, as a result of investigating the cause of the symptom such as the patient having a slight fever after dialysis, it was found that a toxin such as endotoxin produced by the bacteria propagated in the dialysate was the cause, and the preparation or preparation of the dialysate was not performed. It was found that sterilization or sterilization during storage was insufficient.

[0005] Therefore, a detailed examination of the bacterial breeding situation in the compound storage tank revealed that bacterial breeding did not occur in the tank due to regular disinfection, but bacterial breeding in the drainage pipe downstream of the drainage on-off valve. Was recognized. In other words, the drainage pipe has all the environmental conditions such as water and temperature necessary for bacteria to grow, and it is nutritionally sufficient especially when a dialysate containing glucose is prepared or stored. , It was found that bacteria propagate in drainage pipes closed during preparation of dialysate and storage.

Bacteria propagated in the drainage pipe cannot enter the inside of the mixing storage tank while the drainage on-off valve is closed, but when the drainage on-off valve is opened, it is attached to the valve body on the downstream side of the drainage pipe. The bacteria that had been in the tank may enter the tank, or the air in the drain pipe may flow into the tank near the end of drainage, so it is possible that the bacteria mix with this air and enter the tank.

[0007]

[Problems to be solved by the device]

 In view of such conventional circumstances, the present invention provides a dialysate mixing / storing device that prevents bacteria from propagating in the drainage pipe and eliminates invasion of bacteria from the drainage pipe into the dialysate mixing / storage tank. To aim.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in a dialysate mixing / storing device having a mixing and storing tank for mixing and / or storing a dialysate for artificial dialysis treatment of the present invention, drainage pipes from the mixing and storing tank are drained. It is characterized in that a wash water pipe connected immediately downstream of the on-off valve and a flow rate controller for adjusting the flow rate of wash water flowing through the wash water pipe are provided.

[0009]

[Action]

 In the device of the present invention, while the drainage on-off valve of the drainage pipe is closed, washing water containing no bacteria is flowed to the drainage pipe immediately downstream of the drainage on-off valve, so that the bacteria existing in the drainage pipe are discharged. Bacteria cannot propagate to drainage pipes as they wash away sources and nutrients. In particular, if the opening of the connection port of the wash water pipe to the drain pipe is directed toward the drain on-off valve and the connection is made so that the wash water is directly applied to the drain on-off valve, the drain pipe of the valve body Bacteria adhering to the downstream side can also be washed away, which is even more effective in preventing bacterial growth.

The flow rate of the wash water flowing through the drainage pipe is adjusted by a flow rate controller including various valves such as a manual valve and a solenoid valve. For example, the flush water may be continuously flowed while the drainage on-off valve is closed, or intermittent flushing is sufficiently effective. A flow controller such as a manual valve may be sufficient for continuous cleaning, but a flow controller such as a solenoid valve that repeats opening and closing at predetermined time intervals by a control device may be used for intermittent cleaning. It is desirable to use.

It should be noted that the washing water may be any water that does not contain bacteria, and may be, for example, tap water, but R / O water (reverse osmosis membrane-treated water) used for preparing a dialysate, etc. It is preferable to use treated water.

[0012]

【Example】

 A specific example of the device of the present invention will be described with reference to FIG. This apparatus has a mixing and storing tank 2 whose inside is divided into two tanks, a mixing tank portion and a reservoir tank portion. That is, in the preparation tank portion of the preparation storage tank 2, R / O water supplied from the treated water supply unit 3 via the water receiving tank 4 in a fixed amount and a chemical such as sodium bicarbonate supplied from the chemical supply unit 5 in a constant amount. And are dissolved to form a dialysate, and the prepared dialysate is transferred from the preparation tank portion to the storage tank portion and stored therein, and sequentially supplied to the dialyzer 1 as necessary.

A drainage pipe 6 is provided at the bottom of the blending storage tank 2, and the drainage pipe 6 has a drainage opening / closing valve 7 composed of a ball valve near the bottom of the blending storage tank 2 and a drainage treatment facility via a trap. Has reached. The wash water pipe 8 branches from the R / O water flow path from the treated water supply unit 3 to the water receiving tank 4, and is connected to the drain pipe 6 immediately downstream of the drain on-off valve 7 and its connection port. The opening direction of is directed toward the drainage on-off valve 7. Further, an electromagnetic valve 9 is provided in the middle of the washing water pipe 8, and an electromagnetic signal from the control device 10 causes the electromagnetic valve 9 to be at regular time intervals while the drainage on-off valve 7 is closed. Is repeatedly opened and closed, and a fixed amount of R / O water is intermittently kept flowing through the drainage pipe 6 as washing water.

A dialysate was prepared as usual using this apparatus, and the prepared dialysate was supplied to the dialyzer 1 as needed while being stored in the preparation reservoir 2. During that time, the electromagnetic valve 9 of the washing water pipe 8 was opened every 30 minutes and R / O water was flowed for 1 minute to wash the downstream side of the drainage pipe 6 and the drainage on-off valve 7. The flow rate of cleaning water flowing for 1 minute was about 700 ml, and the water pressure of the treated water supply part 3 was 1 kgf / cm ² .

After cleaning the drainage pipe 6 as described above and repeating the preparation and storage of the dialysate for 10 hours, the breeding state of bacteria was examined on the drainage pipe 6 and the drainage on-off valve 7. Little bacterial growth was observed, even when using the included drug.

[0016]

[Effect of the device]

 According to the present invention, since it is possible to prevent bacteria from propagating in the drainage pipe which has not been conventionally treated, it is possible to eliminate the invasion of bacteria from the drainage pipe into the preparation storage tank of the dialysate and to perform the dialysis. It is possible to prevent adverse effects on the human body due to bacterial contamination of the liquid.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a specific example of the device of the present invention.

[Explanation of symbols]

 1 Dialysis device 2 Preparation storage tank 3 Treated water supply part 4 Water receiving tank 5 Chemical supply part 6 Drain pipe 7 Drain opening / closing valve 8 Wash water pipe 9 Solenoid valve 10 Control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Nishioka 613 Kitairizo, Sayama City, Saitama Prefecture Toa Denpa Kogyo Co., Ltd. Sayama Factory

Claims (3)

[Scope of utility model registration request] 1. A dialysate compounding / storing device comprising a compounding reservoir for preparing and / or storing a dialysate for artificial dialysis treatment, wherein a drainage pipe from the compounding reservoir is provided directly downstream of an on-off valve for drainage. The dialysate mixing / storing device, wherein a washing water pipe to be connected and a flow rate controller for adjusting the flow rate of the washing water flowing through the washing water pipe are provided. 2. The flow controller is configured to flow the wash water to the drain pipe continuously or repeatedly at predetermined time intervals while the drain on-off valve is closed. Item 1. A dialysate mixing / storing device according to Item 1. 3. The dialysis according to claim 1, wherein the wash water pipe is connected to the drain pipe so that the opening direction of the connection port of the wash water pipe to the drain pipe faces the drain on-off valve. Liquid compounding / storing device.