JP7280749B2 - Chemical supply device and blood purification system - Google Patents

Description

The present invention relates to a drug solution supply device and a blood purification system.

In a dialysis treatment central system (hereinafter also referred to as "blood purification system") used for dialysis treatment, dialysate is prepared and supplied to each dialysis monitoring device (hereinafter also referred to as "dialyzer"). A feeding device is used. In addition, the dialysate supply device prepares a chemical solution for each of the dialysis devices to clean and disinfect its own device, and supplies it to each dialysis device (see Patent Documents 1 and 2, for example).

Japanese Patent No. 5483741 Japanese Patent No. 5341137

The user sets the process time of the washing and erasing process, and the liquid supply of the chemical solution is controlled according to the set process time. If the process time is set longer than the actual completion time, the chemical solution will be consumed more than necessary. Conversely, if the process time is set shorter than the actual completion time, cleaning and disinfection will be insufficient.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a chemical liquid supply device and a blood purification system that can appropriately perform cleaning and disinfection without wasting the chemical liquid.

A chemical solution supply apparatus according to an embodiment of the present invention supplies a chemical solution to a plurality of blood purification apparatuses in order to perform cleaning and disinfection processing for performing at least one of cleaning and disinfection on the inside of the pipes of the plurality of blood purification apparatuses. The cleaning and disinfection process can be performed from the start of the cleaning/disinfecting treatment to the plurality of blood purification devices by means of a chemical solution delivery unit that delivers liquid, a communication unit that communicates with the plurality of blood purification devices, and the communication unit that communicates with the plurality of blood purification devices. A detection unit that detects the completion time, which is the period until the cleaning and disinfection process for all of the devices is completed , and the wasteful consumption of the chemical solution in the cleaning and disinfection process and the insufficient cleaning and disinfection process. a control unit that controls the chemical solution delivery unit to deliver the chemical solution to the plurality of blood purification devices according to the process time, which is a period set according to the completion time so as to suppress the , provided.

In addition, a blood purification system according to another embodiment of the present invention uses the above-described chemical solution supply device for sending a dialysate in addition to the chemical solution, and the dialysate sent from the chemical solution supply device, and a plurality of blood purification devices for administering blood purification treatment to a patient.

According to the present invention, it is possible to provide a chemical solution supply device and a blood purification system that can appropriately perform cleaning and disinfection without wasting the chemical solution.

1 is a schematic configuration diagram showing an example of a blood purification system according to a first embodiment of the present invention; FIG. 2 is a block diagram showing an example of a control system of the dialysate supply device shown in FIG. 1; FIG. 2 is a block diagram showing an example of a control system of the dialysis monitoring device shown in FIG. 1; FIG. 4 is a flow chart showing an example of cleaning and disinfection steps. FIG. 2 is a sequence diagram showing an example of the operation of the blood purification system shown in FIG. 1, where (a) is a diagram showing an example of the operation of a dialysate supply device, and (b) is an example of the operation of one dialysis device; and (c) is a diagram showing an example of the operation of another dialysis apparatus. FIG. 2 is a sequence diagram showing an example of the operation of the blood purification system shown in FIG. 1, where (a) is a diagram showing an example of the operation of a dialysate supply device, and (b) is an example of the operation of one dialysis device; It is a figure which shows. It is a figure which shows an example of a wash-and-erasure record screen. FIG. 2 is a schematic configuration diagram showing an example of a blood purification system according to a second embodiment of the present invention; FIG.

[First embodiment]
A first embodiment of the present invention will be described below with reference to FIGS.
(blood purification system)
FIG. 1 is a schematic configuration diagram showing an example of a blood purification system according to a first embodiment of the present invention. As shown in FIG. 1, a blood purification system 1 includes a plurality of dialysis monitoring devices (hereinafter also referred to as “dialysis devices”) 3 as an example of blood purification devices for administering dialysis treatment to a patient; A dialysate as a blood purification liquid used for purifying the patient's blood and a chemical solution (hereinafter also referred to as "washing liquid") used for cleaning and disinfecting the piping of the dialysis machine are prepared and supplied to the dialysis machine 3. , a dialysate supply device 2 as an example of a chemical solution supply device, and a supply line 10 (see the solid line in FIG. 1) that conveys the dialysate and the cleaning solution between the dialysate supply device 2 and each dialyzer 3. , and a signal line 11 (see the broken line in FIG. 1) that communicably connects the dialysate supply device 2 and each dialyzer 3 . A cleaning solution is an example of a chemical solution.

The dialysate supply device 2 prepares a dialysate or washing/dissolving solution having a predetermined concentration using the supplied dialysis water, and supplies the prepared dialysate or washing/dissolving solution to each dialyzer 3 . The dialysate prepared by the dialysate supply device 2 is supplied to each dialyzer 3 via the supply line 10 (see arrows in FIG. 1).

A plurality of dialyzers 3 are installed according to blood purifiers (dialyzers, not shown) for performing dialysis treatment on patients, and the dialysate supplied from the dialysate supply device 2 is supplied to each blood purifier. The dialysate containing wastes and the like discharged from the blood purifier is discharged to a drainage channel (not shown).

In the blood purification system 1 according to the present embodiment, the dialysate supply device 2 and each dialyzer 3 are configured to be able to communicate with each other via the signal line 11. In the dialysate supply device 2, each dialyzer 3 It is possible to detect the operating status of The form of communication between the dialysate supply device 2 and each dialyzer 3 is not limited to wired communication using the signal line 11, and may be wireless communication, for example.

(Dialysate supply device 2)
FIG. 2 is a block diagram showing an example of a control system of the dialysate supply device 2 shown in FIG. As shown in FIG. 2, the dialysate supply device 2 includes a control unit 20 that controls each unit, a storage unit 21 that stores various types of information, a preparation unit 22 that prepares the dialysate and washing/dissolving solution, a preparation Communication is carried out between the liquid sending unit 23 for sending the dialysate and washing solution to each dialysis device 3, the operation display unit 24 for inputting and displaying information, and each dialysis device 3 via the signal line 11. and a communication unit 25 for performing. The adjustment unit 22 is an example of a chemical solution preparation unit. The liquid delivery unit 23 is an example of a chemical liquid delivery unit.

[Control unit 20]
The control unit 20 is realized by appropriately combining an arithmetic element such as a CPU, software, an interface, and the like. The control unit 20 functions as receiving means 200, transmitting means 201, valve control means 202, pump control means 203, display control means 204, etc. by operating according to programs implemented in software (not shown). Details of each means 200 to 204 will be described later.

[Storage unit 21]
The storage unit 21 is composed of a ROM (Read Only Memory), a RAM (Random Access Memory), a hard disk, etc., and stores various data such as system configuration information 210, washing process time information 211, washing completion time information 212, and the like. do.

The system configuration information 210 is information regarding the configuration of the blood purification system 1 . The system configuration information 210 includes, for example, identification information such as an ID for specifying each dialysis machine 3, setting information, arrangement information of the dialysis machine 3, and the like.

The washing/disinfecting process time information 211 is the time during which the dialysate supply device 2 continues the washing and disinfecting process (hereinafter also referred to as the "washing/disinfecting process" or simply the "washing/disinfecting process") (hereinafter referred to as the "washing/disinfecting process time"). ” or simply “process time”). Here, the "cleaning process time" is given, for example, as the time during which the dialysate supply device 2 continues to feed the cleaning liquid (hereinafter also referred to as "liquid feeding time"). Also, the washing process time is a fixed value preset by the user based on empirical rules or the like. The rinsing completion time information 212 is information recording the time when the rinsing process was completed for each dialysis machine 3 .

[Preparation section 22]
The preparation unit 22 dilutes the undiluted dialysate with the supplied dialysis water to prepare the dialysate, and dilutes the undiluted washings with the supplied dialysis water to prepare washings. The preparation unit 22 includes a water supply valve 220 capable of switching between supply and non-supply of dialysis water by opening and closing a liquid feed line (not shown) to which dialysis water is supplied from one end, and a dialysate undiluted solution for generating dialysate. A stock solution injection pump 221 that injects the dialysate stock solution from the stock solution tank 4A that stores the undiluted dialysate into the liquid feeding line, and a washing and washing liquid stock solution that injects the washing and washing liquid stock solution from the washing and washing liquid tank 4B that stores the washing and washing liquid stock solution into the liquid feeding line. and an infusion pump 222 . The undiluted washing solution is an example of the undiluted chemical solution.

As the water supply valve 220, for example, an electromagnetic valve, an electric valve, or the like can be used. As the undiluted solution injection pump 221 and the cleaning solution injection pump 222, for example, piston pumps can be used.

In the example shown in FIG. 2, a configuration in which the undiluted solution tank 4A and the washing/dissolving solution tank 4B are provided outside the dialysate supply device 2 is described as an example, but the undiluted solution tank 4A and the washing/dissolving solution tank 4B are Each may be provided inside the dialysate supply device 2 . For example, the undiluted solution tank 4A and the cleaning/disinfecting solution tank 4B may be provided as one of the constituent elements of the preparing section 22 .

The stock solution may be of one type or two or more types. For example, the stock solution may consist of two kinds of stock solution A and stock solution B. In this case, two concentrate tanks 4A (that is, concentrate A tank and concentrate B tank) may be provided for each concentrate. One type or two or more types of washing and erasing liquids may be used. As the cleaning solution, for example, an acid cleaning solution, a peracetic acid disinfecting solution, a sodium hypochlorite disinfecting solution, or the like may be used.

[Liquid sending unit 23]
The liquid sending unit 23 has a storage tank 230 that stores the dialysate and the cleaning solution prepared by the preparation unit 22, and a liquid sending pump 231 that sends the dialysate and the cleaning solution in the storage tank 230. . A liquid-sending line is connected to the storage tank 230, and the dialysate and the washing/dissolving liquid are supplied from the liquid-sending line.

The liquid-sending pump 231 is provided in the supply line 10 . For example, a centrifugal pump can be used as the liquid-sending pump 231 .

[Operation display unit 24 and communication unit 25]
The operation display unit 24 is, for example, a touch panel display, and has a configuration in which a touch panel is superimposed on a display such as a liquid crystal display. Further, the operation display unit 24 is not limited to a touch panel display, and may be a display of a terminal device (not shown) provided outside the dialysate supply device 2 . The communication unit 25 transmits and receives signals to and from the dialysis machine 3 via the signal line 11 .

[Means 200 to 204 of the control unit 20]
Next, the details of each means 200 to 204 constituting the control unit 20 will be described. The receiving means 200 receives various information transmitted from the dialysis machine 3 via the signal line 11 by controlling the communication section 25 . The transmitting means 201 transmits information such as a control signal for controlling the dialysis machine 3 to the dialysis machine 3 via the signal line 11 .

The valve control means 202 controls opening and closing of the water supply valve 220 . When the water supply valve 220 is closed, the amount of dialysis water supplied becomes zero, and accordingly, the injection amount of the stock solution also becomes zero, and the preparation of the dialysate and the washing and washing liquid (or the dilution of the dialysate and the washing and washing liquid) is stopped. It is supposed to be stopped. That is, the valve control means 202 controls whether or not to prepare the dialysate or the washing/dissolving solution by opening/closing the water supply valve 220 .

The pump control means 203 controls various pumps in the dialysate supply device 2 , that is, the undiluted solution injection pump 221 , the cleaning solution injection pump 222 and the liquid feed pump 231 . Specifically, the pump control means 203 adjusts the dialysate to a predetermined concentration by controlling the injection amount of the undiluted dialysate (that is, the discharge amount of the undiluted liquid injection pump 221) according to the amount of dialysis water supplied. do. In addition, the pump control means 203 controls the injection amount of the undiluted cleaning solution (that is, the discharge amount of the cleaning solution injection pump 222) according to the supply amount of the dialysis water, thereby adjusting the cleaning solution to a predetermined concentration. adjust. It should be noted that it may be a process of injecting a chemical solution in advance.

The display control means 204 controls the operation display unit 24 to display a display screen such as the washing record screen 5 (see FIG. 7).

(Dialyzer 3)
FIG. 3 is a block diagram showing an example of the control system of the dialysis machine 3. As shown in FIG. As shown in FIG. 3, the dialysis machine 3 includes a control unit 30 that controls each unit, a storage unit 31 that stores various types of information, a sensor unit 32 that detects the dialysate and the drug solution, and inputs and displays information. and a communication unit 35 for communicating with the dialysate supply device 2 via the signal line 11 . The sensor section 32 is an example of a detection section.

The operation display unit 34 and the communication unit 35 of the dialyzer 3 have substantially the same functions as the operation display unit 24 and the communication unit 25 of the dialysate supply device 2 described above, so detailed description thereof will be omitted. .

[Control unit 30]
The control unit 30 of the dialysis machine 3 functions as receiving means 300, transmitting means 301, detecting means 302, and the like. Details of each means 300 to 302 will be described later.

[Storage unit 31]
The storage unit 31 of the dialysis machine 3 stores data such as washing time estimation information 310 . The estimated washing time information 310 is the estimated time required for the washing process to be completed (hereinafter also referred to as the "estimated required washing time") based on the reference time (hereinafter also simply referred to as the "reference time"). ) is parameter information. The washing time estimation information 310 is a fixed value set in advance based on an empirical rule or the like by a user's operation. The estimated washing time information 310 may be given, for example, as time or as a volume of washing/disinfecting liquid.

Specifically, the time at which the washing process is completed (hereinafter also referred to as “washing completion time”) is specified according to the reference time and information recorded as washing time estimation information 310 . More specifically, the washing completion time may be the time when the predetermined time stored in the storage unit 31 as the washing time estimation information 310 has elapsed from the reference time. Alternatively, the washing completion time is the time when a predetermined volume of washing and washing liquid stored in the storage unit 31 as the washing time estimation information 310 is sent to the dialyzer 3 from the reference time. good too.

At the reference time, for example, clean water (specifically, reverse osmosis (RO) membrane-treated RO water, etc.) as dialysis water used in pre-washing (see S2 in FIG. 4), which will be described later, is used. The time of replacement with the cleaning solution, more specifically, the time of completion of replacement of the RO water with the cleaning solution (hereinafter also referred to as "replacement completion time") may be used. Here, the “replacement completion time” may be, for example, the time at which the sensor unit 32 detects that the washing/dissolving liquid has been injected into the piping unit (not shown) of the dialysis device 3 . In addition, the reference time is not necessarily limited to the time when the replacement of the RO water with the cleaning solution is completed. good too. When the washing time estimation information has passed, the dialysis machine 3 updates the status to the disinfection completed state, and notifies the dialysate supply device 2 of the status.

[Sensor unit 32]
The sensor unit 32 includes at least one sensor that detects the washing liquid sent to the dialyzer 3 . As an example, the sensor unit 32 includes, for example, a conductivity meter 320 that measures the conductivity of the fluid flowing through the pipe, an absorbance meter 321 that measures the absorbance of the fluid, and the like. The sensor section 32 is provided at a predetermined position of the piping section of the dialysis device 3 .

[Means 300 to 302 of the control unit 30 of the dialyzer 3]
Next, the details of each means 300 to 302 constituting the control unit 30 of the dialysis machine 3 will be described. The receiving means 300 controls the communication unit 35 of the dialyzer 3 and receives information such as a control signal transmitted from the dialysate supply device 2 via the signal line 11 .

The transmitting means 301 transmits various kinds of information such as information indicating the operation status of the dialyzer 3 to the dialysate supply device 2 via the signal line 11 . The "information indicating the operating status" includes, for example, information indicating that the washing process has been completed and information such as the time (that is, the washing completion time information 212). The detection means 302 controls the sensor section 32 to detect that the RO water in the piping section has been replaced with the cleaning liquid.

(Washing and erasing process)
FIG. 4 is a flow chart showing an example of the washing/erasing process. As shown in FIG. 4, the washing and erasing step includes a step of pre-cleaning the dialyzer 3 (S2) after the supply of dialysate is completed (S1), a washing and erasing step of cleaning and disinfecting the piping of each dialyzer 3. A step (S3) and a step (S4) of post-cleaning the dialysis device 3 are included.

Here, "end of supply of dialysate" means that one treatment for one patient (referring to a series of treatments consisting of blood removal, dialysis, and blood return) has ended. "Pre-washing" means injecting RO water into the piping to wash away the remaining dialysate.

In the washing/disinfecting step, a washing/disinfecting liquid is sent to each dialysis device 3 to wash and disinfect the dialysis device 3 . When a plurality of types of washing and erasing liquids are used in the washing and erasing step, a step of washing away the one washing and erasing liquid with RO water while switching from one washing and erasing liquid to another washing and erasing liquid may be further included.

“Post-washing” refers to injecting RO water into the piping to wash away residual cleaning liquid (when multiple cleaning liquids are used, the last used cleaning liquid).

(Operation of blood purification system 1)
Next, an example of the operation of blood purification system 1 according to the first embodiment will be described. In the following description, the operation of the blood purification system 1 will be described separately for (1) the case of shortening the washing-out process time and (2) the case of extending the washing-out process time.

(1) Operation when shortening the wash-off process time FIG. 5 is a sequence diagram showing an example of the operation of the blood purification system 1 shown in FIG. (b) is a dialysis machine 3 that is arranged on the most upstream side among a plurality of dialysis machines 3 (hereinafter, when specifically distinguished from other dialysis machines 3, "most upstream dialysis (also referred to as "apparatus 3A") shows an example of the operation of the dialysis apparatus 3 (c) is the dialysis apparatus 3 arranged on the most downstream side among the plurality of dialysis apparatuses 3 (hereinafter, particularly distinguishing from other dialysis apparatuses 3) (also referred to as "most downstream dialysis device 3Z").

Here, “upstream” refers to the side closer to the dialysate supply device 2 and “downstream” refers to the side farther from the dialysate supply device 2 . In addition, the "most upstream" is not necessarily limited to the one with the smallest distance from the dialysate supply device 2 among the plurality of dialysis devices 3, but the first among the plurality of dialysis devices 3. It shall include where the process begins or ends. Similarly, the term "most downstream" also includes the dialysis apparatus 3 whose washing/discharging step is started or completed last among the plurality of dialysis apparatuses 3 .

In the following description, on the time axis of the horizontal axis, the time when the washing process in the blood purification system 1 is started is "t _s ", and the time when the washing process of the most upstream dialyzer 3A is completed is "t _A ”, and the time when the rinsing process of the most downstream dialysis device 3Z is completed is “t _Z ”.

Here, the time _ts at which the washing process in the blood purification system 1 is started may be, for example, the time at which the dialysate supply device 2 starts feeding the washing and washing liquid. In addition, the time _tZ at which the washing process of the most downstream dialyzer 3Z is completed is also the time at which the washing process of the entire blood purification system 1 is completed.

It should be noted that the time for which the dialysate supply device in the comparative example completes the washing process _{is tf} (see FIG. 9). This time _tf is the time at which the dialysate supply device finishes feeding the washing and washing liquid to the dialyzer 3 . In addition, _the dialysate supply device in the comparative example has _, as the washing process time, the difference (t _f −t _s ) is preset. In the description of this operation, the time _tf when the dialysate supply device in the comparative example completes the washing process is set to be later than the time _tZ when the washing process of the most downstream dialyzer 3Z actually completes. (ie, t _Z <t _f ).

As shown in FIG. 5( a ), the dialysate supply device 2 follows the washing/discharging process time preset as the washing/discharging step time information 211 to the plurality of dialyzers 3 connected to the dialysate supply device 2 . (See the dashed double-headed arrow in FIG. 5(a).). Here, the rinsing process time preset in the dialysate supply apparatus 2 according to the present embodiment is the time t _Z when the rinsing process of the most downstream dialyzer 3Z is actually completed, and the most upstream dialyzer. The time when the rinsing step of 3A is completed may be the time corresponding to the difference from t _A (t _Z −t _s ). A specific example of the washing-out process time will be described later (see FIG. 7).

The washing/disinfecting liquid continues to be supplied from the upstream side toward the downstream side during the set washing/disinfecting process time (t _Z −t _s ). The washing and washing liquid supplied from the dialysate supply device 2 is taken in sequentially from the upstream side dialysis device 3 to the downstream side dialysis device 3 . That is, the washing and washing liquid is first taken into the most upstream dialysis device 3A, then taken into the downstream dialysis device 3 in order, and finally taken into the most downstream dialysis device 3Z.

In addition, the time from when the dialysate supply device 2 starts sending the washing/disinfecting liquid until the washing/disinfecting liquid is taken into each dialysis device 3 is, for example, It is determined by the distance of the supply line 10 between them, the speed of feeding the washing/disinfecting liquid (that is, the amount of washing/disinfecting liquid fed per unit time), and the like.

The dialyzer 3 starts the washing/disinfecting process when it takes in the washing/disinfecting liquid. In the configuration of the blood purification system 1 according to the present embodiment, first, the most upstream dialysis device 3A starts cleaning and disinfection (washing and erasing step), and the downstream dialysis device 3 sequentially starts the washing and erasing step. , and finally, the washout process is initiated in the most downstream dialyzer.

In addition, in each dialyzer 3, the washing and erasing process is completed when a predetermined time has elapsed since the start of the washing and erasing process. Here, the predetermined time is, for example, the time recorded as the washing time estimation information 310 described above. In the configuration of the blood purification system 1 according to the present embodiment, as shown in FIG. 5(b), first, the rinsing step in the most upstream dialyzer 3A is completed (see "t _A "). Next, the rinsing process in the dialyzer 3 on the downstream side is completed in order. Finally, the rinsing step in the most downstream dialyzer 3Z is completed (see "t _Z ").

When the rinsing process in the most downstream dialyzer 3Z is completed (see "t _Z "), the rinsing process time (that is, (t _Z −t _s )) preset in the dialysate supply device 2 has elapsed. Then, the dialysate supply device 2 completes the feeding of the cleaning solution.

As described above, the dialysate supply device 2 is set with an appropriate predetermined washing/discharging process time, and the dialysate supply device 2 stops feeding the washing/discharging liquid according to this appropriate washing/discharging process time. As a result, the time for which the dialysate supply device 2 feeds the cleaning liquid can be shortened as compared with the comparative example. In this way, wasteful consumption of the washing/dissolving liquid due to continued feeding of the washing/dissolving liquid after the washing/dissolving step is completed in all the dialyzers 3 connected to the dialysate supply apparatus 2 can be avoided. It is possible to suppress and reduce the consumption of cleaning solution.

(2) Operation when Extending Washing and Erasing Step Time FIG. 6 is a sequence diagram showing an example of the operation of the blood purification system 1 shown in FIG. (b) is one of a plurality of dialysis machines 3 (hereinafter also referred to as "any dialysis machine 3N" when specifically distinguished from other dialysis machines 3) .) is a diagram showing an example of the operation. In the description of this operation, the time _tf when the dialysate supply device in the comparative example completes the washing process is set to be before the time _tN when the washing process of any of the dialyzers 3N is actually completed. (ie, t _f < t _N ).

In the following, as shown in FIG. 6(b), a case in which one of the dialyzers 3N temporarily stops working for some reason during the washing process will be described as an example. In FIG. 6(b), as an example of a case where the dialysis machine 3 temporarily stops working, the piping of the dialysis machine 3 stops at a certain time _t1 , and then the operation of the piping resumes at _t2 . A case will be described as an example.

As shown in FIG. 6A, the dialysate supply device 2 is connected to the dialysate supply device 2 according to the washing process time set as the washing process time information 211 in the storage unit 21. The washing/dissolving liquid is sent to a plurality of dialyzers 3 (see the dashed double-headed arrow in FIG. 6(a)).

Here, the wash-out process time may be a time corresponding to (t _N −t _s ). Note that the washing-out process time (t _N −t _s ) may be determined according to the time (t ₂ −t ₁ ) during which the washing-out process is interrupted. By setting the rinsing process time to the above value, even if the rinsing process is temporarily interrupted in any of the dialysis machines 3N, the dialysate supply device 2 can Until the washing/disinfecting step at (see “t _N ”), the feeding of the washing/disinfecting liquid can be continued.

In this way, the washing process is temporarily interrupted in any of the dialyzers 3N, and the interrupted time (t ₂ - t ₁ ) becomes longer than a certain length. Even if the washing and erasing process is not completed by the time _tf when the feeding of the disinfecting solution is completed, the restarted washing and erasing process is completed until the end without leaving the state of insufficient washing and disinfection. can be made

Also, the wash-out process time is not necessarily limited to a fixed value, and may be a variable value that can be changed during the wash-out process. Specifically, for example, when the dialysis apparatus 3 stops operating (for example, when the stoppage of the piping unit is detected), a preset value in the comparative example (for example, (t _f −t _s )) to a time (for example, (t _N −t _s )) that considers the interrupted time.

(Display screen)
FIG. 7 is a diagram showing an example of a washing record screen. As described above, the washing record screen 5 is created in accordance with the washing completion time information 212 transmitted from each dialysis machine 3 to the dialysate supply device 2, and the display control means 204 controls the operation of the dialysate supply device 2. It is controlled to display on the display unit 24 .

As shown in FIG. 7, the washing record screen 5 includes, for example, the following information. The information contained in the washing record screen 5 is summarized in Table 1 below.

The washing/discharging recording screen 5 displays an appropriate washing/discharging process time that should be set in the dialysate supply device 2 in advance. This appropriate washing process time is obtained from each washing completion time (in particular, the last washing completion time) of the plurality of dialyzers 3 . The user can refer to the information displayed on the washing/discharging recording screen 5 and set the appropriate washing/discharging process time in the dialysate supply device 2 in advance. For example, in the example shown in FIG. 7, the user may preset a parameter of "70 minutes" displayed in the washing completion time column 53 in the dialysate supply device 2 as an appropriate washing process time. "Appropriate washing-out process time" is an example of a candidate value for the washing-out process time.

[Second embodiment]
Next, a blood purification system 1 according to a second embodiment of the invention will be described. FIG. 8 is a schematic configuration diagram showing an example of blood purification system 1 according to the second embodiment of the present invention. The blood purification system 1 according to the second embodiment is different from the blood purification system 1 according to the first embodiment in that a dissolving device 6 and a water treatment device 7 are further provided. The following description focuses on points that differ from the first embodiment.

Blood purification system 1 further includes dissolution device 6 and water treatment device 7 connected to dialysate supply device 2 via supply line 10 in addition to the configuration of blood purification system 1 according to the first embodiment. Further, the dissolving device 6 and the water treatment device 7 are configured to be able to communicate with the dialysate supply device 2 via the signal line 11 .

The dissolution device 6 mixes the dialysate and the RO water to produce a dialysate undiluted solution. The water treatment device 7 includes a filtration unit (not shown) having a filtration membrane or the like therein, and filters raw water to generate RO water. The dissolution device 6 and the water treatment device 7 are configured so that the rinsing process is performed at the same timing as the dialysis device 3 under the control of the dialysate supply device 2 .

In the present embodiment, the time for which the dialysate supply device 2 supplies the washing/dissolving liquid can be changed without the user performing a setting operation. Specifically, the control unit 20 of the dialysate supply device 2 updates the washing process time information 211 according to the washing completion time information 212 stored in the storage unit 21 . The dialysate supply device 2 continues the liquid supply according to the updated latest washing process time information 211 .

As described above, the dialysate supply device 2 can feed the washing and washing liquid to the dialyzer 3, the dissolving device 6, and the water treatment device 7 in an appropriate washing and washing process time. To prevent wasteful consumption of washing and erasing liquid without completing a washing and erasing process in a state of insufficient disinfection.

(Modification)
The dialysate supply device 2 may stop feeding the washing/disinfecting liquid when the last washing/disinfecting process is completed, regardless of the washing/disinfecting process time information 211 . Specifically, when the receiving means 200 of the dialysate supply device 2 receives information indicating that the washing and washing process is completed from the dialyzer 3 related to the last washing and washing step, the feeding of the washing and washing liquid is stopped. may be controlled to Even in the above-described manner, the dialysate supply device 2 can supply the washing/disinfecting liquid in an appropriate washing/disinfecting process time. Wasteful consumption of liquid can be suppressed.

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the scope of claims. Also, it should be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention. Moreover, the present invention can be modified appropriately without departing from the gist thereof.

Reference Signs List 1 blood purification system 10 supply line 11 signal line 2 dialysate supply device 20 control unit 200 reception means 201 transmission means 202 valve control means 203 pump control means 204 display control means 21 storage unit 210...System configuration information 211...Washing process time information 212...Washing completion time information 22...Preparation part 220...Water supply valve 221...Undiluted solution injection pump 222...Washing solution injection pump 23...Liquid sending part 230...Storage tank 231...Sending Liquid pump 24 Operation display unit 25 Communication units 3, 3A, 3N, 3Z Dialysis machine 30 Control unit 300 Receiving means 301 Transmitting means 302 Detecting means 31 Storage unit 310 Washing time estimation information 32 Sensor unit 320 Conductivity meter 321 Absorbance meter 34 Operation display unit 35 Communication unit 4A Undiluted solution tank 4B Cleaning solution tank 5 Cleaning recording screen 51 Start time column 52 Process column 53 Completion of cleaning Time column 54 Washing completion judgment column 55 Chemical liquid consumption column 56 Table 561 Apparatus name column 562 Liquid feeding start time column 563 Replacement completion time column 564 First monitor data column 565 Washing completion time Column 566 Second monitor data column 567 Total liquid volume column 6 Dissolution device 7 Water treatment device

Claims (6)

a chemical solution delivery unit for delivering a chemical solution to the plurality of blood purification devices in order to perform cleaning and disinfection processing of at least one of cleaning and disinfection in the pipes of the plurality of blood purification devices;
a communication unit that communicates with the plurality of blood purification devices;
The communication unit communicates with the plurality of blood purification devices to detect a completion time, which is a period from the start of the cleaning and disinfection processing to the completion of the cleaning and disinfection processing for all of the plurality of blood purification devices. a detection unit;
According to the process time, which is a period set according to the completion time so as to suppress wasteful consumption of the chemical solution and insufficient cleaning/disinfecting treatment in the cleaning/disinfecting process, the chemical solution feeding unit a control unit that controls to send the drug solution to the plurality of blood purification devices by controlling
A chemical liquid supply device. The control unit is configured to be able to change the process time during the cleaning/disinfecting process according to the operation status of the plurality of blood purification apparatuses during the cleaning/disinfecting process.
The chemical liquid supply device according to claim 1. The completion time includes the time at which the clean water used before the chemical liquid is transferred is replaced with the chemical liquid, and the plurality of blood purification apparatuses predetermined in each of the plurality of blood purification apparatuses. and an estimated required time, which is a period estimated to be required for the cleaning and disinfecting process in each of
The chemical liquid supply device according to claim 1 or 2. further comprising display control means for displaying a candidate value for the process time together with the time at which the cleaning/disinfecting process for each of the plurality of blood purification apparatuses is completed;
The chemical liquid supply device according to any one of claims 1 to 3 . The control unit automatically updates the process time according to the completion time.
The chemical liquid supply device according to any one of claims 1 to 3 . 6. The liquid medicine supply device according to any one of claims 1 to 5 , which feeds a dialysate in addition to the liquid medicine;
a plurality of blood purification devices that perform blood purification treatment on a patient using the dialysate sent from the drug solution supply device;
blood purification system.

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