JP4051560B2 - Dialysis machine - Google Patents

Dialysis machine Download PDF

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JP4051560B2
JP4051560B2 JP2003188112A JP2003188112A JP4051560B2 JP 4051560 B2 JP4051560 B2 JP 4051560B2 JP 2003188112 A JP2003188112 A JP 2003188112A JP 2003188112 A JP2003188112 A JP 2003188112A JP 4051560 B2 JP4051560 B2 JP 4051560B2
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passage
liquid
dialysate
supply
provided
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JP2005021246A (en
Inventor
利春 沢田
隆幸 西村
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澁谷工業株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dialysis apparatus, and more particularly to a dialysis apparatus provided with a blood leakage detection means for detecting blood in a used dialysate.
[0002]
[Prior art]
Conventionally, a dialysis machine has been provided with a blood leakage sensor that detects blood leaked into the used dialysate collected from the dialyzer, and glass is placed in the dialysate flow path in the blood leakage sensor. A light emitting element and a light receiving element are provided, and it is determined whether blood has leaked into the used dialysate based on the amount of light received by the light receiving element. (Patent Document 1)
Proteins in the blood are dissolved in the used dialysate, and the above glass may accumulate on the glass due to the flow of the used dialysate, reducing the amount of light received by the light receiving element and causing false detection. Therefore, it is necessary to periodically clean the glass, and the blood leakage sensor of Patent Document 1 is configured so that the glass can be easily washed.
[0003]
[Patent Document 1]
Japanese Utility Model Publication No. 5-22180 [0004]
[Problems to be solved by the invention]
In the case of the blood leak sensor disclosed in Patent Document 1, it is necessary to wait until dialysis is completed in order to clean the glass, and it has not been possible to prevent a decrease in detection accuracy during dialysis.
In view of such a problem, the present invention provides a dialysis apparatus that enables washing of the blood leakage detection means even during dialysis.
[0005]
[Means for Solving the Problems]
That is, the dialyzer according to claim 1 is a supply liquid chamber for supplying a new dialysate to a dialyzer via a supply passage, a recovery liquid chamber for recovering a spent dialysate from the dialyzer via a recovery path, and A liquid supply path for supplying purified water or new dialysate to the supply liquid chamber, a waste liquid path for discharging the used dialysate from the recovery liquid chamber, and a blood leak for detecting blood in the used dialysate in the waste liquid path In a dialysis machine equipped with a detection means,
A cleaning passage for circulating purified water or new dialysate from the liquid supply passage is connected to the waste fluid passage on the upstream side of the blood leakage detection means, and an opening / closing valve is provided in the cleaning passage, and this opening / closing valve is provided during dialysis operation. The inside of the blood leak detection means is washed by opening the valve.
[0006]
According to such a dialysis apparatus, since the clean water or new dialysate in the washing passage flows into the blood leakage detection means by opening the on-off valve during the dialysis operation, the inside of the blood leakage detection means is washed. It is possible to prevent accumulation of proteins and the like, and it is possible to prevent a decrease in detection accuracy by the blood leak detection means.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a circuit diagram of a dialysis machine 1 in this embodiment. This dialysis machine 1 is connected to a dialyzer 2 and a dialysate circuit 3 connected to the dialyzer 2 to flow dialysate. And a blood circuit 5 for circulating blood, and the dialysis machine 1 is controlled by a control means (not shown).
A large number of bundled hollow fibers 4 are provided inside the dialyzer 2, and blood flows inside the hollow fibers 4. In FIG. 1, one hollow fiber 4 is schematically shown in the dialyzer 2, and the inside of the hollow fiber 4 is a blood chamber 2A and the outside is a dialysate chamber 2B.
The blood chamber 2A is connected to a blood passage 5a that is connected to the human body and sends blood to the blood chamber 2, and a blood passage 5b that returns blood to the human body. The blood passes through the blood chamber 2A from left to right in the figure. It comes to flow.
[0008]
Next, the dialysate circuit 3 is provided with a dialysate supply / discharge means 11 for controlling the supply amount of new dialysate supplied to the dialyzer 2 and the recovered amount of used dialysate recovered from the dialyzer 2. ing.
The dialysate supply / discharge means 11 is connected to a supply passage 12 for supplying a new dialysate to the dialysate chamber 2B and a recovery passage 13 for discharging the used dialysate from the dialysate chamber 2B. The liquid supply / discharge means 11 is connected to a liquid supply passage 15 through which a new dialysate supplied from a dialysate preparation means (not shown) is circulated.
The used dialysate in the recovery passage 13 is sent by a recovery pump 14 provided in the recovery passage 13, and the new dialysate in the supply passage 15 is dialyzed by a supply pump 16 provided in the supply passage 15. The liquid is supplied to the liquid supply / discharge means 11.
Further, a waste liquid passage 17 for discharging the used dialysate from the dialysate supply / discharge means 11 is connected to a waste liquid tank (not shown) in the dialysate supply / discharge means 11, and blood in the used dialysate is passed through the waste liquid passage 17. A blood leakage detection means 18 for detecting is provided.
The liquid supply passage 15 is provided with a purifying means 22 for purifying new dialysate, and the purifying means 22 has a housing 22A in which an inlet port for dialysate to be purified and an outlet port for the purified liquid are formed. And a purification filter 22B made of a hollow fiber provided in the housing 22A.
Further, the housing is provided with a drain port 22C through which the dialysate flowing from the inlet port flows out without passing through the filter 22B, and the surface of the filter 22B is washed away by allowing the dialysate to flow out from the drain port 22C. To prevent clogging.
In this embodiment, one end of the cleaning passage 26 is connected to the waste liquid passage 17 in the upstream position in the vicinity of the blood leakage detection means 18 and the other end is connected to the drain port 22C of the purification means 22 to supply liquid. Connected to the passage 15, a new dialysate in the liquid supply passage 15 is circulated through the washing passage 26, and an opening / closing valve 27 is provided in the washing passage 26 and is opened and closed by a control means.
[0009]
The dialysate supply / discharge means 11 includes a first chamber 31A and a second chamber 31B having the same shape, and silicone oil pumps 32A and 32B are provided in the first chamber 31A and the second chamber 31B, respectively.
Two diaphragms 33 are provided in each of the first and second chambers 31A and 31B, and are divided into recovery liquid chambers 34a and 34b and supply liquid chambers 35a and 35b, and a variable volume between them. Chambers 36a and 36b are partitioned.
The recovery passage 13 and the waste liquid passage 17 are branched and connected to the recovery liquid chambers 34a and 34b via first and second three-way valves 37A and 37B, respectively, while the supply passage 12 and the liquid supply passage 15 are also branched. The supply liquid chambers 35a and 35b are connected via third and fourth three-way valves 38A and 38B.
In addition, silicone oil is sealed in the variable volume chambers 36a and 36b, and the volume of the variable volume chambers 36a and 36b can be changed by increasing or decreasing the amount of the silicone oil by the silicone oil pumps 32A and 32B. It is possible.
[0010]
Next, the blood leakage detection means 18 provided in the waste liquid passage 17 includes a waste liquid suction port 51A connected to the waste liquid passage 17 on the peripheral surface of a housing 51 having a cylindrical shape as shown in FIG. A port 51B is formed, and the used dialysate flows from a waste liquid suction port 51A on the right side of the drawing and is discharged from a waste liquid discharge port 51B on the left side.
A flow path 51C is formed in the housing 51 for communicating the waste liquid suction port 51A and the waste liquid discharge port 51B. A light emitting element 52 is provided at one end of the flow path 51C, and a light receiving element 53 is provided at the other end. Yes.
The light receiving element 53 is connected to the control means so as to transmit a light receiving signal, and the light emitting element 52 and the light receiving element 53 are isolated from the flow path 51C by a transparent plate 54 made of glass or resin, respectively. Do not touch directly.
When the light-emitting element 52 irradiates light while the used dialysate flows in the flow path 51C, the light transmitted through the used dialysate is received by the light receiving element 53, and the light reception signal is controlled. Sent to the means.
At this time, if blood is mixed into the used dialysate, the light transmittance is changed and the amount of light received by the light receiving element 53 is reduced. Is determined to be mixed.
[0011]
A dialysis operation of the dialysis apparatus 1 having the above configuration will be described.
First, in the dialysate supply / discharge means 11, for example, the recovery passage 13 and the recovery liquid chamber 34a of the first chamber 31A are communicated by the first three-way valve 37A, and the recovery liquid chamber 34b of the second chamber 31B is connected by the second three-way valve 37B. The waste liquid passage 17 is brought into a communication state, the third three-way valve 38A is connected to the supply liquid chamber 35a of the first chamber 31A and the supply passage 12, and the fourth three-way valve 38B is connected to the liquid supply passage 15 and the second passage. The supply liquid chamber 35b of the chamber 31B is brought into communication.
In this state, a new dialysate flows into the supply liquid chamber 35b through the supply liquid passage 15 by the operation of the supply liquid pump 16, and the diaphragm 33 moves to the left end in the figure (state shown in FIG. 1). Accordingly, the stored used dialysate is discharged from the recovery liquid chamber 34 b, and this dialysate is discharged from the waste liquid port via the waste liquid passage 17.
On the other hand, when the collection pump 14 is operated and the spent dialysate flows from the dialysate chamber 2B of the dialyzer 2 into the recovery solution chamber 34a through the recovery passage 13, the diaphragm 33 moves to the right end in the figure (FIG. 1). Accordingly, a new dialysis solution is discharged from the supply fluid chamber 35a, and this dialysis fluid is supplied to the dialysis fluid chamber 2B through the supply passage 12.
At this time, the volume of the recovery liquid chamber 34a is increased by operating the silicone oil pump 32A of the first chamber 31A from which the used dialysate is recovered to decrease the volume of the variable volume chamber 36a by a predetermined amount. Water removal is performed according to the increased amount.
When the state shown in FIG. 1 is reached, the control means controls the first and second three-way valves 37A and 37B and the third and fourth three-way valves 38A and 38B, so that the recovery liquid chamber 34a and the waste liquid passage 17 are supplied. The connection between the first chamber 31A and the second chamber 32B is switched by communicating the liquid chamber 35a with the supply liquid passage 15, the recovery liquid chamber 34b with the recovery passage 13, and the supply liquid chamber 35b with the supply passage 12, respectively. A new dialysate is supplied to the vessel 2 and is operated to collect the used dialysate.
Further, the used dialysate flowing through the waste liquid passage 17 flows from the waste liquid suction port 51A of the blood leakage detection means 18, flows through the flow path 51C, is discharged from the waste liquid discharge port 51B, and is discharged again into the waste liquid passage 17. In the blood leakage detection means 18, the light emitting element 52 irradiates light toward the light receiving element 53, and the light receiving element 54 that receives this light transmits a light reception signal to the control means.
The control means determines that there is no blood leakage in the used dialysate if the amount of received light of the received light signal is equal to or greater than a predetermined value. The operator is informed of the abnormality.
[0012]
Here, conventionally, such a blood leak detection means 18 has a problem that the detection accuracy is lowered due to the following reasons.
That is, the spent dialysate contains proteins and the like contained in the blood by dialysis, and this protein flows through the flow path of the blood leakage detection means 18 while the flow path 53C and the transparent plate. Then, the protein is deposited over time, and the light emission amount of the light emitting element 52 and the light reception amount of the light receiving element 53 are reduced.
For this reason, even if blood is not actually mixed in the dialysate, the control means may erroneously determine that there is a blood leak in the used dialysate depending on the amount of light received by the light receiving element 53. .
[0013]
On the other hand, in this embodiment, the washing passage 26 is connected to an upstream position close to the blood leakage detecting means 18, and the on-off valve 27 periodically contains proteins in the blood during the dialysis operation. A new dialysate before use which is not used is circulated to the washing passage 26.
As a result, the transparent plate 54 is washed with new dialysate to prevent protein deposition on the transparent plate 54, so that the light emission amount of the light-emitting element 52 and the light-receiving amount of the light-receiving element 53 do not decrease. It is possible to prevent the detection accuracy from being lowered from the start to the end of the operation.
Further, by connecting the washing passage 26 at a position adjacent to the blood leakage detection means 18, it becomes difficult for the new dialysate flowing through the washing passage 26 to mix the used dialysate containing the protein, and the new dialysate It can suppress that the washing | cleaning effect of the transparent plate 54 falls.
The interval at which the on-off valve 27 is opened and closed and the opening time of the on-off valve 27 can be set as appropriate while observing the cleaning effect of the transparent plate 54 with new dialysate, even during dialysis. The transparent plate 54 can be washed by circulating a new dialysate at any time.
Furthermore, in this embodiment, since the cleaning passage 26 is connected to the drain port 22C of the purifying means 22, the transparent plate 54 and the filter 22B are cleaned together by opening and closing the on-off valve 27.
[0014]
Next, a second embodiment according to the present invention will be described. FIG. 3 shows a circuit diagram of the dialysis apparatus 101 in the present embodiment. The same elements as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
Here, the dialysis machine 1 of the first embodiment is a dialysis monitoring apparatus that uses a new dialysis fluid supplied from a dialysis fluid preparation means (not shown), whereas the dialysis machine 101 of the present embodiment is supplied. Purified water is supplied to the liquid passage 15 from a water supply source (not shown), and the dialysate stock solution from the stock solution supply source 19 provided in the dialyzer 101 is added to the purified water, thereby creating a new dialysate. It is configured as.
Hereinafter, the dialysis apparatus 101 of the present embodiment will be described in detail. The dialysis apparatus 101 of the present embodiment is also connected to the dialyzer 2 and the dialyzer 2 in the same manner as the dialysis apparatus 1 of the first embodiment, so that dialysate can be supplied. It has a dialysate circuit 3 that circulates and a blood circuit 5 that circulates blood, and is controlled by control means (not shown).
Also in the present embodiment, as in the first embodiment, the waste fluid passage 17 for draining the used dialysate is provided with a blood leakage detection means 18 and further becomes an upstream position in the vicinity of the blood leakage detection means 18. One end of the cleaning passage 26 is connected to the waste liquid passage 17 and the other end is connected to the liquid supply passage 15 so that the purified water in the liquid supply passage 15 is circulated through the cleaning passage 26. An on-off valve 27 is provided which is opened and closed by.
In the dialysis apparatus 101 of the present embodiment, the point that the stock solution supply source 19 is provided, the configuration of the dialysate supply / discharge means 111 in the dialysate circuit 3, and the flow path of the cleaning passage 26 are the same as those in the first embodiment. It is different from the dialysis machine 1, and the difference will be mainly described below.
[0015]
First, as described above, purified water flows through the liquid supply circuit 15, and sodium chloride (NaCl) and sodium hydrogen carbonate (NaHCO 3 ), which are dialysate stock solutions, are supplied to the liquid supply passage 15. Two stock solution supply sources 19 to be stored are connected to each other via a stock solution supply passage 20, and a stock solution pump 21 is provided in each stock solution supply passage 15. In the present embodiment, the purification means 22 is not provided in the liquid supply passage 15.
Next, the diaphragm 133 is provided in each of the first and second chambers 131A and 131B having the same shape in the dialysate supply / discharge means 111, and the recovery liquid chambers 134a and 134b and the supply liquid chambers 135a and 135b are provided. It is partitioned.
The recovery passage 13 and the waste liquid passage 17 are branched and connected to the recovery liquid chambers 134a and 134b via the first to fourth electromagnetic valves 137A to 137D, respectively, while the supply passage 12 and the liquid supply passage 15 are also branched. The supply liquid chambers 135a and 135b are connected via fifth to eighth solenoid valves 138A to 138D.
Further, one end of the water removal passage 126 is connected to the downstream side of the recovery pump 14 in the recovery passage 13 and upstream of the branch point to the first electromagnetic valve 137A and the third electromagnetic valve 137C, and the other end is disposed of the waste liquid. The passage 17 is connected to the downstream side of the junction from the second solenoid valve 137 </ b> B and the fourth solenoid valve 137 </ b> D, and a water removal pump 121 is provided in the middle of the water removal passage 126. The used dialysate can be sent to 17.
[0016]
And the piston pump 40 shown in FIG. 4 is used for the said concentrate pump 21 in a present Example, and the said piston pump 40 is demonstrated below.
The piston pump 40 includes a cylinder 41, a piston 42 that reciprocates while rotating inside the cylinder 41, and a motor 43 that drives the piston 42, and the piston 42 and the motor 43 are connected by a joint mechanism 44.
The joint mechanism 44 includes a cylindrical member 44 a fixed to the rotation shaft of the motor 43 and a spherical bearing 44 b provided on the inner wall of the cylindrical member 44 a, and the piston 42 is a pin provided at an end protruding from the cylinder 41. 42b is penetrated by the spherical body member of the spherical bearing 44b, and it connects.
On the tip side of the cylinder 41, there are provided a suction port 41A communicated with the stock solution supply source 19 via the stock solution supply passage 20 and a discharge port 41B communicated with the solution supply passage 15 via the stock solution supply passage 20. It has been.
[0017]
Further, a notch 42a is provided at the tip of the piston 42, and the suction port 41A communicates with a measuring chamber 41E formed in the cylinder 41 by the notch 42a until just before the piston 42 reaches top dead center. Conversely, until just before the piston 42 reaches bottom dead center, the discharge port 41B communicates with the measuring chamber 41E.
Accordingly, the stock solution is sucked from the suction port 41A until the piston 42 reaches the top dead center, and then the sucked stock solution is discharged from the discharge port 41B until the piston 42 reaches the bottom dead center. ing.
Thereby, the required amount of liquid feeding can be accurately performed by setting the rotation speed of the motor 43. 4 shows the case where the piston 42 is at the bottom dead center in the joint mechanism 44 for explanation, and the state between the bottom dead center and the top dead center is shown on the tip side of the piston 42.
A seal member 45 that surrounds the piston 42 and a cap member 46 that fixes the seal member 45 to the cylinder 41 are provided on the motor 43 side of the cylinder 41.
[0018]
In the cylinder 41, a groove 41a surrounding the piston 42 is formed on the inner peripheral surface, and an inflow port 41C as an inflow port and an outflow port 41D as an outflow port are formed in communication with the groove 41a. . In the middle of the cleaning passage 26, the inflow port 41C is connected to the upstream side and the outflow port 41D is connected to the downstream side, and the piston pump 40 is disposed.
Therefore, by opening the on-off valve 27, the purified water from the liquid supply passage 15 is circulated to the waste liquid passage 17 through the inflow port 41C, the groove 41a, and the outflow port 41D in this order, and further, the piston 42 rotates and reciprocates. By moving, purified water flows into the gap between the inner surface of the cylinder 41 and the outer surface of the piston 42 via the groove 42a, and flows out from this gap.
[0019]
A piston pump 40 of the same type as the stock solution pump 21 is also used for the water removal pump 121, and the recovery passage 13 side of the water removal passage 126 is connected to the suction port 41A, and the waste liquid passage 17 side is connected to the discharge port 41B. The required amount of used dialysate can be fed from the recovery passage 13 to the waste fluid passage 17.
Further, the dewatering pump 121 is in the middle of the washing passage 26 and is connected to the downstream side of the washing passage 26 rather than the two stock solution pumps 21, 21. The outflow port 41 </ b> D of the stock solution pump 21 is communicated, and the outflow port 41 </ b> D is communicated with the waste liquid passage 17 on the upstream side of the blood leak detection means 18.
As a result, the purified water discharged from the outflow port 41D of the downstream raw solution pump 21 by opening the on-off valve 27 passes through the inflow port 41C of the dewatering pump 121, the groove 41a inside the cylinder 41, and the outflow port 41D in this order. Then, it is discharged to the waste liquid passage 17.
[0020]
The dialysis apparatus 101 according to the second embodiment configured as described above uses the first to fourth electromagnetic valves 137A to 137D for switching the connection of the recovery liquid chambers 134a and 134b to the recovery passage 13 and the waste liquid passage 17. The fifth to eighth electromagnetic valves 138A to 138D are used for switching the connection of the supply liquid chambers 135a and 135b to the supply passage 12 and the supply passage 15 and the water removal operation is performed. Although the pump 121 is different from the dialysis apparatus 1 of the first embodiment, the basic dialysis operation is common, and the detailed description thereof is omitted.
In this embodiment, since this is a personal dialysis machine, new dialysis fluid is supplied to the supply fluid chambers 135a and 135b by supplying purified water and raw solutions through the water supply passage 15 by the operation of the feed pump 16 and the raw material pump 21. This is performed by flowing into the supply liquid chambers 135a and 135b and creating a new dialysate in the supply liquid chambers 135a and 135b.
When the water removal operation is performed by the water removal pump 121, the motor 43 of the piston pump 40 serving as the water removal pump 121 is turned on while any of the collection liquid chambers 34 a and 34 b collects the used dialysate. A predetermined amount is rotated, and the used dialysate flowing through the recovery passage 13 is discharged to the waste liquid passage 17 by a predetermined amount without passing through the recovery liquid chambers 34a and 34b.
[0021]
In the case of the above-described personal dialysis apparatus 101 and the above-described dialysis apparatus 101 including the piston pump, the following problems occur in the stock solution pump 21 and the water removal pump 121 during the dialysis operation.
That is, in the piston pump 40, the fixed solution of the undiluted solution or the used dialysate is sent by reciprocating movement of the piston 42. At this time, the undiluted solution or the used dialysate is separated by the gap between the inner surface of the cylinder 41 and the outer surface of the piston 42. Into a small amount.
The stock solution thus flowed crystallizes when dried in the gap between the cylinder 41 and the piston 42, and the spent dialysate precipitates calcium carbonate due to the sliding friction between the cylinder 41 and the piston 42. The mobility will get worse.
Therefore, in this embodiment, purified water from the liquid supply passage 15 is circulated through the groove 41a formed in the cylinder 41 via the cleaning passage 26, so that the purified water flows into the sliding portion of the cylinder 41 and the piston 42, and the stock solution By preventing the drying and washing the precipitated calcium carbonate, the slidability of the cylinder 41 and the piston 42 is prevented from deteriorating.
[0022]
In the case of the dialysis apparatus 101 provided with the piston pump 40 in the second embodiment, an inflow port 41C and an outflow port 41D formed in the cylinder 41 of the piston pump 40 are connected in the middle of the washing passage 26, and the piston pump The purified water that has circulated through the gap between the inner surface of the cylinder 41 and the outer surface of the piston 42 is circulated to the upstream side close to the blood leakage detection means 18.
Thus, as in the case of the first embodiment, by opening the on-off valve 27 during the dialysis operation, the transparent plate 45 of the blood leakage detecting means 18 is washed with purified water, and protein deposition on the transparent plate 45 is prevented. Therefore, a decrease in detection accuracy of the blood leak detection means 18 is prevented. Further, the piston pump 40 and the blood leakage detection means 18 can be cleaned together, which is efficient.
Also in the second embodiment, when the purifying means 22 is provided in the liquid supply passage 15 in the same manner as in the first embodiment to purify the purified water, the cleaning passage 26 is connected to the drain port 22C. By connecting the end portions, the filter 22B, the piston pump 40, and the transparent plate 45 can be washed together. Further, it is not always necessary to connect the cleaning passage 26 to both the stock solution pump 21 and the water removal pump 121, and either one may be used. Furthermore, it is not necessary to connect any of them.
[0023]
【The invention's effect】
According to the above invention, the inside of the blood leak detection means can be washed even during dialysis, and a reduction in detection accuracy by the blood leak detection means can be prevented.
[Brief description of the drawings]
FIG. 1 is a circuit diagram of a dialysis apparatus according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of blood leakage detection means.
FIG. 3 is a circuit diagram of a dialysis apparatus according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view of a piston pump.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,101 Dialysis machine 2 Dialyzer 12 Supply passage 13 Recovery passage 15 Supply passage 17 Waste fluid passage 18 Blood leakage detection means 19 Concentration supply source 21 Concentration pump 22 Purification means 22B Filter 22C Drain outlet 26 Cleaning passage 27 Open / close valve 34a, 34b Recovery liquid chambers 35a, 35b Supply liquid chamber 40 Piston pump 52 Light emitting element 53 Light receiving element 54 Transparent plate 121 Dewatering pump

Claims (3)

  1. A supply liquid chamber for supplying new dialysate to the dialyzer via the supply passage, a recovery liquid chamber for recovering the used dialysate from the dialyzer via the recovery passage, and purified water or new dialysis in the supply liquid chamber. In a dialysis apparatus provided with a liquid supply path for supplying a liquid, a waste liquid path for discharging spent dialysate from the recovery liquid chamber, and a blood leakage detection means for detecting blood in the used dialysate in the waste liquid path,
    A cleaning passage for circulating purified water or new dialysate from the liquid supply passage is connected to the waste fluid passage on the upstream side of the blood leakage detection means, and an opening / closing valve is provided in the cleaning passage, and this opening / closing valve is provided during dialysis operation. The inside of the blood leak detection means is washed by opening the dialysis device.
  2. A purification means for purified water or dialysate provided with a filter is provided in the supply passage, and the purification means is provided with a drain outlet for allowing the inflowing liquid to flow out without passing through the filter, and the cleaning passage is provided with the drainage liquid. 2. The dialysis apparatus according to claim 1, wherein the dialysis apparatus is connected from the mouth to a waste liquid passage upstream of the blood leakage detection means.
  3. The dialysis apparatus supplies purified water to a supply liquid chamber via a supply passage, sucks a dialysate stock solution from a stock solution supply source and supplies the sucked stock solution to the supply liquid chamber, and the recovery Comprising at least one of a water removal piston pump for sucking used dialysate from the passage and discharging the sucked used dialysate to the waste passage;
    In these cylinders of the piston pump, an inflow port for allowing liquid to flow into a gap between the inner surface of the cylinder and an outer surface of the piston, and an outflow port for allowing liquid to flow out from the gap are formed, and the inflow port formed in the cylinder in the middle of the cleaning passage The dialysis apparatus according to claim 1, wherein an outlet is connected to the outlet.
JP2003188112A 2003-06-30 2003-06-30 Dialysis machine Active JP4051560B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012165565A1 (en) * 2011-06-01 2012-12-06 日機装株式会社 Blood purification system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5278681B2 (en) * 2009-01-28 2013-09-04 メディカテック株式会社 Dialysis machine sensor device
JP2011120821A (en) * 2009-12-14 2011-06-23 Nikkiso Co Ltd Blood purifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012165565A1 (en) * 2011-06-01 2012-12-06 日機装株式会社 Blood purification system
JP2012249746A (en) * 2011-06-01 2012-12-20 Nikkiso Co Ltd Blood purification system
US10183106B2 (en) 2011-06-01 2019-01-22 Nikkiso Company Limited Blood purification system

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