JPH07275353A - Storage system of dialyzing fluid - Google Patents

Abstract

PURPOSE:To inhibit an air to contact with a dialyzing fluid prevent aerial infection, by providing an air vent pass to fill the dialyzing fluid in a storage tank, a valve to close the storage tank tightly and a detecting means to detect storage amount of the dialyzing fluid from extension amount of the storage tank. CONSTITUTION:A dialyzing fluid is supplied from mixing production equipment to a storage tank B. When the tank is filled with the dialyzing fluid, the fluid is flown into a detection pipe 59 via an air vent pass 56. Then a sensor detects it and a control system switches a pass switch valve 58 to close the storage tank. The air is completely discharged from the storage tank B in this state. When dialyzing work is carried out to many patients, the dialyzing fluid in the storage tank B is consumed to reduce the volume of the dialyzing fluid to lower the height of the storage tank B, when the dialyzing fluid is filled from the mixing production equipment, the volume in the tank is increased to make the height higher. The height of the tank B is detected by sensors 52-55 to detect the storage amount of the dialyzing fluid in the storage tank B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dialysate storage device for storing dialysate.

[0002]

2. Description of the Related Art Conventionally, as a dialysate manufacturing system, a stock solution supply source for supplying a stock solution of dialysate, a diluting water supply source for supplying diluting water, a stock solution opening / closing valve for opening and closing the stock solution supply source, An on-off valve for diluting water that opens and closes the diluting water supply source, and a mixing and manufacturing apparatus for a dialysate that mixes the undiluted solution from the undiluted solution supply source and the diluted water from the diluting water supply source to produce a dialysate,
There is known one provided with a storage tank for storing the dialysate mixed and manufactured by the mixing and manufacturing apparatus (Jikkou 3
-54748). The storage tank is usually formed in a box shape having rigidity and has an air vent passage in the upper part thereof, and the air in the storage tank is supplied in accordance with the supply and discharge of the dialysate stored in the storage tank. The air is discharged to the outside through the air vent passage or the outside air is sucked. Further, conventionally, the storage tank is formed in a box shape having rigidity, and a diaphragm, a positive pressure valve and a negative pressure valve are provided in the storage tank to seal air inside the storage tank, and thereby the inside and outside of the storage tank are sealed. It has been proposed that the communication between the two is cut off (Japanese Patent Application No. 1-15307).

[0003]

However, in the former storage tank, the outside air is sucked into the storage tank, which may cause air infection of the dialysate. On the other hand, in the latter storage tank, since the outside air is not sucked into the storage tank, the risk of air infection can be eliminated, but due to the structure that seals the air inside,
The air and dialysate cannot be completely brought into non-contact with each other, and it becomes difficult to clean the entire area of the storage tank. In view of such circumstances, the present invention provides a dialysate storage device capable of removing air from the inside.

[0004]

SUMMARY OF THE INVENTION That is, the present invention provides a storage tank which is provided so as to be expandable and contractible and whose volume increases and decreases in accordance with the supply and discharge of dialysate into and from the storage tank, and substantially all air in the storage tank. To the outside to fill the dialysate in the storage tank, an on-off valve that opens and closes the air vent to seal the storage tank, and the expansion and contraction amount of the storage tank filled with dialysate. A detection means for detecting the stored amount of the dialysate inside is provided.

[0005]

According to the above construction, since the storage tank can be expanded and contracted, when the dialysate is supplied to the storage tank in a sealed state in which the dialysate is filled, The volume of the storage tank can be increased with the supply, and when the dialysate in the storage tank is discharged to the outside, the volume of the storage tank can be reduced with the discharge of the dialysate. Therefore, since there is no supply / discharge of air between the inside of the storage tank and the outside, and substantially no air remains in the storage tank, it is possible to prevent contact between air and dialysate, and Since the dialysate comes into contact with the entire area of the storage tank, if the cleaning solution is used instead of the dialysate, the entire area of the storage tank can be cleaned.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. Referring to FIG.
It is provided with a mixing and manufacturing device A, A'of a dialysate, and a storage tank B for storing the dialysing liquid mixed and manufactured by each mixing and manufacturing device A, A '. Since the two dialysate mixing production apparatuses A and A ′ have substantially the same configuration, only the configuration related to one mixing production apparatus A will be described, and the other mixing production apparatus A ′. For the above, the reference numerals used in the mixing manufacturing apparatus A are shown with "'" added, and the description thereof is omitted. The mixing and manufacturing apparatus A includes a closed container 1 and two diaphragms 2 and 3 provided in the closed container 1, and the two diaphragms 2 and 3 are provided.
1 divides the closed container 1 into three chambers, that is, a first mixing chamber 4 on the left side in FIG. 1, a variable volume chamber 5 in the center, and a second mixing chamber 6 on the right side. The dilution water supply source 11 for supplying the dilution water is provided in common to the two mixing production apparatuses A and A ′, and the dilution water supplied under pressure from the dilution water supply source 11 is added. After being heated by the warm heaters 12 and 13, deaeration is performed by the air vent valve 14, and the dilution water that has flowed through the air vent valve 14 is branched into two to be separated into the two mixing production apparatuses A and A ′, respectively. To be supplied to. The dilution water supplied to the mixing production apparatus A is branched into two after flowing through the dilution water opening / closing valve 16 provided in the supply circuit 15, one of which is the first inlet opening / closing valve 17
To the first mixing chamber 4 and the other to the second inlet opening / closing valve 1
It is adapted to be respectively supplied to the second mixing chamber 6 via 8. Two undiluted solution supply sources 19 and 20 for supplying undiluted solution of dialysate are connected to the supply circuit 15 on the downstream side of the diluting water opening / closing valve 16, and each undiluted solution supply source 1 is connected.
9 and 20 open and close valves 21 and 2 for undiluted solution that open and close each
2 is provided. Therefore, by opening either the diluting water opening / closing valve 16 or the undiluted solution opening / closing valves 21 and 22 in a fixed order, the diluted water and the two kinds of undiluted solutions are placed in a fixed order in the first mixture as described later. It can be supplied to the chamber 4 or the second mixing chamber 6, whereby the dialysate can be mixed and produced in each mixing chamber 4, 6. As the above-mentioned two kinds of stock solutions, a concentrated solution containing calcium ions and magnesium ions and a concentrated solution containing bicarbonate are usually used. Further, a cleaning liquid supply source 24 is connected to the upstream side of the dilution water opening / closing valve 16 via a cleaning liquid opening / closing valve 23 so that each part can be washed with the cleaning liquid from the cleaning liquid supply source 24 after dialysis is completed. I am doing it. The dialysate mixed and manufactured in the first mixing chamber 4 is discharged to the outside through the first outlet opening / closing valve 32 of the discharge circuit 31, and the dialysate mixed and manufactured in the second mixing chamber 6 is discharged in the discharge circuit 31. It is designed to be discharged to the outside via the second outlet opening / closing valve 33, and the dialysate flowing through the opening / closing valves 32 and 33 is then merged and the drain circuit 31 is discharged.
Is supplied to the storage tank B from above.
The discharge circuit 31 prevents the liquid sealed in the variable volume chamber 5 such as silicone oil from being mixed with the dialysate and being supplied to the storage tank B when the diaphragms 2 and 3 are damaged. Therefore, a silicon sensor 34 is provided, and a concentration sensor 35 for detecting the concentration of dialysate is provided downstream of the silicon sensor 34. An on-off valve 36 is provided on the downstream side of the concentration sensor 35, and the discharge circuit 31 between the concentration sensor 35 and the on-off valve 36 is provided.
A drain passage 37 is connected to the drain passage 37, and a relief valve 38 is provided in the drain passage 37. Therefore, when the silicon sensor 34 detects that the silicone oil is mixed in the dialysate or the concentration sensor 35 detects that the concentration of the dialysate is not a predetermined concentration, the on-off valve 36 is opened. By closing the relief valve 38 and opening the relief valve 38, the dialysate can be discharged to the outside through the drain passage 37 to prevent the silicone oil from being supplied to the storage tank B.

Next, silicon oil is sealed in the variable volume chamber 5 as described above, and when one diaphragm 2 moves, the other diaphragm 3 follows and displaces via the silicon oil. I am trying. The volume of the variable volume chamber 5 is increased or decreased by the volume increasing / decreasing means 41, and accordingly, the volume of the first mixing chamber 4 or the second mixing chamber 6 on both sides can be changed in reverse. ing. The volume increasing / decreasing means 41 is provided with a precision pump 42, a reservoir 43, an opening / closing valve 44 and two flow path switching valves 45 and 46. The precision pump 42 is driven by a servo motor (not shown) to produce an accurate amount of silicone oil. Can be discharged.
Further, the on-off valve 44 is designed to be closed when the variable volume chamber 5 is sealed with silicone oil.
The two flow path switching valves 45, 46 switch between the flow paths of the two so that the suction side of the precision pump 42 communicates with the variable volume chamber 5 and the discharge side communicates with the reservoir 43, and vice versa. The suction side of the precision pump 42 can be connected to the reservoir 43, and the discharge side can be switched to the state of being connected to the variable volume chamber 5. However, as shown in the enlarged view of FIG. 2, the storage tank B is made of polyethylene, for example, and has a columnar shape as a whole, and the columnar outer peripheral surface is bellows-shaped so that it can be contracted in the vertical direction. Although the storage tank B is self-supporting, it is provided in a columnar support frame 51 so as to be vertically expandable and contractable in order to prevent it from falling. Four sensors 52, 53, 54, 55 are provided in the height direction of the support frame 51,
Whether or not the storage tank B is present is determined by the sensors 52 to 55.
Therefore, it is possible to detect whether or not the upper surface of the storage tank B has risen to the height position of each sensor. The discharge circuit 31 described above is connected to the upper surface of the storage tank B, and the air vent passage 56 and the circulation passage 57 are connected to the upper surface of the storage tank B. The discharge circuit 31, the air vent passage 56, and the circulation passage 57 are
At least the portion connected to the storage tank B is flexible, so that vertical expansion and contraction of the storage tank B is allowed. A flow passage switching valve 58 is connected in the middle of the air bleed passage 56, and a detection pipe 59 is connected vertically upward to the tip of the air bleed passage 56 downstream of the flow passage switching valve 58. At the same time, a sensor 60 for detecting the presence or absence of dialysate is provided at that portion. The flow passage switching valve 58 has a switching position where the storage tank B is connected to the detection pipe 59 and a switching position where the detection pipe 59 is connected to the drain passage 61 connected to the flow passage switching valve 58. Further, at the bottom of the storage tank B, a supply passage 71 for supplying an internal dialysate to a large number of consoles (not shown) and for supplying a dialyzer (not shown) from each console is connected. A pump 72, a dialysate concentration meter 73, and a liquid supply on-off valve 74.
Are provided in sequence. The circulation passage 57 is connected between the concentration meter 73 and the liquid supply on-off valve 74. When the liquid supply on-off valve 74 is closed, the dialysate in the storage tank B is supplied by the pump 72 to the supply passage. By circulating the dialysate from 71 through the circulation passage 57 into the storage tank B, the dialysate can be circulated and mixed in the storage tank B as well. Further, a drain passage 75 is connected to the bottom of the storage tank B, and the relief valve 76 provided in the drain passage 75 is opened to open the storage tank B.
The remaining dialysate can be discharged to the outside. It is to be noted that the opening / closing control of the various on-off valves, the switching control of the flow path switching valve, and the operation control of the pump motor described above are controlled by the control device 81 shown in FIG. Signal of the control device 81
It is designed to be input to.

In the above structure, the above-mentioned mixing production apparatus A
3A, the volume in one of the first mixing chambers 4 and the volume in the variable volume chamber 5 are maximum and the volume in the other second mixing chamber 6 is zero in FIG. 3A. It shows the state. Further, in this state, the dialysate is already mixed and manufactured in the first mixing chamber 4, and the diluting water opening / closing valve 16, the first inlet opening / closing valve 17 and the second outlet opening / closing valve 33 are respectively opened and used for the stock solution. On-off valves 21, 22,
The second inlet opening / closing valve 18, the first outlet opening / closing valve 32, and the opening / closing valve 44 of the volume increasing / decreasing means 41 are closed. From this state, as shown in FIG. 3B, the control device 81 closes the first inlet opening / closing valve 17 and the second outlet opening / closing valve 33, respectively, and opens the second inlet opening / closing valve 18 and the first outlet opening / closing valve 32. Let As a result, the dilution water from the dilution water supply source 11 is supplied into the second mixing chamber 6, and at the same time, the two diaphragms 2 and 3 are integrally formed as shown in FIG.
Since it is moved to the left of, the dialysate of the same amount as the dilution water supplied into the second mixing chamber 6 is pushed out from the first mixing chamber 4,
It will be supplied to the storage tank B. The control device 8
1 causes a timer (not shown) to count from the state of FIG. 3B, and after a predetermined time has elapsed, the dilution water opening / closing valve 16 is closed. As a result, the supply of the diluting water into the second mixing chamber 6 is stopped and the supply of the dialysate supplied from the first mixing chamber 4 to the storage tank B is also stopped. Next, as shown in FIG. 3C, the control device 81 closes the first outlet opening / closing valve 32 to block the communication between the first mixing chamber 4 and the storage tank B, and then opens one stock solution opening / closing valve 21. It is opened, and one of the stock solution supply sources 19 is connected to the second mixing chamber 6. In this state, the opening / closing valve 44 of the volume increasing / decreasing means 41 is opened, and
The operation of the precision pump 42 is started in a state where the suction side of the precision pump 42 is communicated with the variable volume chamber 5 and the discharge side is communicated with the reservoir 43 by the two flow path switching valves 45, 46. A predetermined amount of the silicone oil therein is discharged to the reservoir 43. In this case, the first
Since the inlet opening / closing valve 17 and the second outlet opening / closing valve 33 are closed and the volume in the first mixing chamber 4 cannot be changed, the volume in the second mixing chamber 6 is increased by the volume reduction in the variable volume chamber 5. As a result, the stock solution is sucked into the second mixing chamber 6 from the stock solution supply source 19 by the above-mentioned predetermined amount. In this state, as shown in FIG. 3D, the stock solution opening / closing valve 21 is closed, the dilution water opening / closing valve 16 is opened, and the dilution water is fed into the second mixing chamber 6 again. The first outlet opening / closing valve 32 is opened to the first
The mixing chamber 4 and the storage tank B are communicated with each other, and the dialysate in the first mixing chamber 4 is supplied to the storage tank B again.
At this time, the dilution water fed into the second mixing chamber 6 via the supply circuit 15 completely removes the undiluted solution from the undiluted solution supply source 19 remaining in the supply circuit 15 into the second mixing chamber 6. Will be supplied to. On the other hand, the control means 81 switches between the two flow path switching valves 45, 46 of the volume increasing / decreasing means 41, and the precision pump 4
The suction side of 2 is communicated with the reservoir 43, and the discharge side of 2 is communicated with the variable volume chamber 5. In this state, the operation of the precision pump 42 is restarted, and the variable volume chamber 5 is filled with the silicone oil in the reservoir 43 by the predetermined amount.
To restore the volume in the variable volume chamber 5 to the original maximum value, and then close the on-off valve 44. This state is equal to the state shown in FIG. 3B. The control device 81 starts counting the timer from the moment when the diluting water opening / closing valve 16 is opened in the state of FIG. 3D, and is sufficient to return the volume in the variable volume chamber 5 to the original maximum value. When the state shown in FIG. 3B is reached over time, the same operation as that in which a predetermined amount of the stock solution is supplied from the one stock solution supply source 19 to the second mixing chamber 6 is repeated, and the other stock solution supply source 20 is obtained. Then, a predetermined amount of the stock solution is supplied to the second mixing chamber 6, and finally the state of FIG. 3B is restored again. In this state, diluting water, one undiluted solution, diluting water, the other undiluted solution, and diluting water are supplied in this order in the second mixing chamber 6, and the volume in the variable volume chamber 5 is the same as the original volume. It is the maximum value. When the supply of the diluting water into the second mixing chamber 6 progresses and the discharge of the dialysate from the first mixing chamber 4 progresses accordingly, the volume of the first mixing chamber 4 eventually becomes zero and the diaphragm 2, Movement of 3 stops. In this state, the second mixing chamber 6 is filled with a predetermined amount of two kinds of undiluted solution and a predetermined amount of diluting water obtained by subtracting the amount of the undiluted solution from the maximum volume of the second mixing chamber 6. Therefore, a dialysate having the required concentration is thus produced by mixing. In addition, this state is the reverse of FIG. 3A, and when the control device 81 detects that the volume of the first mixing chamber 4 has become zero by the timer, the first mixing chamber 4
The same control as that performed for the second mixing chamber 6 is performed to mix and produce the dialysate in the first mixing chamber 4. Then, while the dialysate is produced in the second mixing chamber 6, the dialysate already produced in the first mixing chamber 4 reduces the volume of the variable volume chamber 5 to generate two types of fluid in the second mixing chamber 6. In addition to temporarily stopping the supply of the stock solution only twice when inhaling the stock solution, the stock solution is continuously supplied to the storage tank B,
Also, the two temporary suspensions can be completed in a short time as a whole because the amount of each stock solution is sufficiently smaller than that of the dilution water. As described above, since the dialysate can be supplied to the storage tank B almost continuously by the mixing production apparatus A, the volume variation of the storage tank B is reduced, so that the storage tank B can be manufactured in a small size. it can. Also,
Since two kinds of stock solutions can be sucked into the mixing chambers 4 and 6 by the precision pump 42, there is also an advantage that it is not necessary to provide a pump for feeding each stock solution for each stock solution. In addition,
In the above-mentioned embodiment, the mixing manufacturing apparatus A and A'of two dialysates is used.
Since it is provided, if the dialysate is supplied from the other mixing manufacturing equipment while the supply of the dialysing fluid is temporarily stopped by one mixing manufacturing equipment, a complete continuous supply to the storage tank B is realized. can do. Further, in the above-described embodiment, the control device 81 manages the switching timing of each on-off valve by a timer, but a sensor such as a flow meter or a pressure gauge is provided in each passage so that the switching timing of each on-off valve can be determined based on the flow rate or pressure fluctuation. May be obtained. Further, in the above embodiment, each mixing chamber 4 and 6 is provided with an inlet and an outlet, respectively. However, one passage is connected to each mixing chamber, and the passage is branched into two so that one is the inlet and the other is the other. May be the exit. Further, the inlet opening / closing valve and the outlet opening / closing valve for each mixing chamber may be integrally configured.

Next, the operation of the storage tank B will be described with reference to FIG. 2. The storage tank B is first deflated. That is, the control device 81 sets the storage tank B to the detection pipe 59 by the flow passage switching valve 58. In this state, air is introduced into the storage tank B from the detection tube 59 through the air vent passage 56, and the storage tank B has an appropriate height due to its elasticity, for example, an intermediate height between the sensors 54 and 55. There is. In this state, when the dialysate is supplied into the storage tank B from the mixing manufacturing apparatuses A and A ′, and the storage tank B is filled with the dialysate in time, the dialysate is detected through the air vent passage 56. It comes into the tube 59. Then, the sensor 60
Detects that dialysate is present in the detection tube 59, whereby the control device 81 switches the flow path switching valve 58 to connect the detection tube 59 to the drain passage 61,
The storage tank B is sealed. In this state, the air is completely discharged from the storage tank B, and the detection tube 59
The dialysate that has flowed into the drainage passage 61 flows from the flow path switching valve 58 to the drain passage 61.
Will be discharged to the outside through. When a required amount of dialysate is supplied into the storage tank B and stored in a sealed manner,
Dialysis work is performed on a large number of patients. As a result, when the dialysate in the storage tank B is consumed, the volume in the storage tank B decreases and the height of the storage tank B decreases.
When the dialysate is replenished into the storage tank B from the mixing production apparatuses A and A ′, the volume in the storage tank B is increased and the height of the storage tank B is increased. When the height of the storage tank B increases and the height thereof exceeds the sensor 53, the operation of the mixing manufacturing apparatuses A and A ′ is stopped and the storage tank B is stopped.
When the supply of the dialysate to the storage tank B is stopped and the height of the storage tank B becomes lower than the height of the sensor 54, the operation of the mixing production apparatuses A and A ′ is restarted and the storage tank B is supplied to the storage tank B. The supply of dialysate is started. Thus, the storage tank B normally expands and contracts between the sensors 53 and 54,
No air is introduced into the storage tank B. Therefore, the dialysate in the storage tank B is not contaminated by air infection, and the dialysate is in contact with the entire area of the storage tank B. It can be touched and the cleaning can be complete. When the height of the storage tank B exceeds the sensor 52 or falls below the sensor 55, the control device 81 activates an alarm device (not shown) to issue an alarm.

[0010]

As described above, according to the present invention, it is possible to prevent contact between air and dialysate, so that it is possible to prevent air infection of dialysate.
Further, since the dialysate comes into contact with the entire area of the storage tank, there is an effect that the entire area of the storage tank can be washed by using the cleaning solution instead of the dialysate.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3A is a system diagram showing a first step of producing a dialysate in a second mixing chamber.

FIG. 3B is a system diagram showing a second step of producing a dialysate in the second mixing chamber.

FIG. 3C is a system diagram showing a third step of producing a dialysate in the second mixing chamber.

FIG. 3D is a system diagram showing a fourth step of producing a dialysate in the second mixing chamber.

[Explanation of sign]

 A, A '... Mixing / manufacturing device B ... Storage tank 56 ... Air vent passage 58 ... Flow path switching valve

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Akashi 58 Soya Tahonmachi Kou, Kanazawa, Ishikawa Shibuya Industry Co., Ltd. Stock company Nipro

Claims (1)

[Claims] 1. A storage tank that is expandable and contractible, and whose volume increases and decreases according to the supply and discharge of dialysate to the inside, and substantially all the air in this storage tank is released to the outside, and the inside of the storage tank The air vent passage that fills the dialysate, the on-off valve that opens and closes the air vent passage to seal the storage tank, and the storage amount of the dialysate inside is detected from the expansion and contraction amount of the storage tank that is filled with the dialysate. A storage device for the dialysate, comprising: