JP2010207452A - Dialysate sampling unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To supply a dialyzer with clean dialysate. <P>SOLUTION: A dialysate sampling unit 9 is capable of sampling the dialysate supplied to the dialyzer 2 from a dialysate supply device 1. The dialysate sampling unit 9 is removably placed in a dialysate supply line 3. The dialysate sampling unit 9 has a liquid passage portion 190 through which the dialysate passes, and a liquid sampling portion 290 which is provided on the liquid passage portion 190 and samples the dialysate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dialysate collection unit, and more particularly to a dialysate collection unit capable of collecting a dialysate supplied from a dialysate supply device to a dialyzer.

  In the conventional artificial dialysis system, dialysate is supplied from the dialysate supply device to the dialyzer via a dialysate supply line connecting the dialysate supply device and the dialyzer. The blood of the dialysis patient is supplied from the patient to the dialyzer via a blood line connecting the patient and the dialyzer. Then, waste products are removed from the patient's blood in the dialyzer by the principle of diffusion using the hollow fiber membrane filled in the dialyzer. Moreover, the dialysate from which waste products have been removed (dialysate containing waste products) is sent back from the dialyzer to the dialysate supply device via a dialysate discharge line that connects the dialyzer and the dialysate supply device (for example, (See Patent Document 1).

JP 2008-43555 A

  In a conventional artificial dialysis system, dialysate is supplied from a dialysate supply device to a dialyzer through a dialysate supply line. A coupler is attached to the dialysate supply line, and the dialysate supply device and the dialyzer are connected by attaching the coupler to the dialyzer.

  Generally, in artificial dialysis, the dialysate supply line is often reused in consideration of cost. For this reason, in the dialysate supply line, endotoxin and the like may be generated during reuse. In particular, in the dialysate supply line, the endotoxin and the like are not easily attached to the coupler for connecting the supply tube to the dialyzer due to the structure. For this reason, even if the dialysate before passing through the coupler is clean, endotoxin or the like may be mixed into the dialysate after passing through the coupler. In addition, since the position where the coupler is attached to the dialyzer is a position immediately before the dialysate flows into the dialyzer, it is difficult to determine whether the dialysate flowing into the dialyzer is sanitary. there were.

  The present invention has been made in view of such problems, and an object of the present invention is to enable collection of dialysate and supply clean dialysate to a dialyzer. There is.

  The dialysate collection unit according to claim 1 is a dialysate collection unit capable of collecting the dialysate supplied from the dialysate supply device to the dialyzer. The dialysate collection unit is detachably disposed on a dialysate supply line connecting the dialysate supply device and the dialyzer. This dialysis fluid collection unit has a fluid passage portion through which the dialysis fluid passes and a fluid collection portion provided in the fluid passage portion for collecting the dialysis fluid.

  Here, by arranging the dialysate collection unit in the dialysate supply line, the dialysate can be collected from the solution collection section when the dialysate passes through the liquid passage section. Thereby, it can be test | inspected whether the dialysate supplied to a dialyzer from a dialysate supply apparatus is hygienic. If the sanitary condition of the dialysate is likely to decrease, a cleaner dialysate can be supplied to the dialyzer, for example, by replacing the dialysate collection unit with a new one.

  In the dialysate collection unit according to claim 2, in the dialysate collection unit according to claim 1, the first end of the cylindrical liquid passage part is connected to the male connector, and the second end of the cylindrical liquid passage part is provided. The part is a female connector. The first end of the liquid passage part is detachably attached to the coupler. The second end of the liquid passage part is detachably attached to the dialysate introduction port of the dialyzer.

  In this case, the dialysate collection unit is disposed between the coupler and the dialysate introduction port of the dialyzer. For this reason, when the sanitary state of the liquid passage part of the dialysate collection unit is likely to be lowered, the dialysate collection unit can be easily removed from the dialysate supply line. If the dialysate collection unit is removed from the dialysate supply line, the inside of the dialysate collection unit and the coupler can be easily washed, or the dialysate collection unit can be easily replaced with a new one. . Thereby, a clean dialysate can be supplied to a dialyzer.

  Moreover, since the 1st end part of the liquid passage part in a dialysate collection unit is a male connector, the 1st end part of the liquid passage part is mounted inside the coupler. This makes it difficult for the toxin produced on the inner wall of the coupler to occur.

  In the dialysate collection unit according to claim 3, in the dialysate collection unit according to claim 1 or 2, an extraction port for extracting dialysate passing through the liquid passage portion is provided on the outer peripheral surface of the liquid passage portion. Is provided. And a liquid collection part is detachably attached to the extraction port of this liquid passage part.

  In this case, the liquid collection part can be attached to the extraction port of the liquid passage part, or the liquid collection part can be detached from the extraction port of the liquid passage part. For this reason, when collecting a dialysate, a liquid collection part is attached to a liquid passage part, and after collecting a dialysate, a liquid collection part can be removed from a liquid passage part. Thereby, it is possible to prevent the dialysate remaining in the fluid collection part from being mixed into the dialysate passing through the liquid passage part. Thereby, a clean dialysate can be supplied to a dialyzer.

  In the dialysate collection unit according to claim 4, in the dialysate collection unit according to claim 3, the extraction port of the liquid passage part has attachment / detachment means that can attach / detach the liquid collection part.

  In this case, since the extraction port of the liquid passage part has attachment / detachment means, the liquid collection part can be easily attached to the extraction port of the liquid passage part, or the liquid collection part can be easily attached from the extraction port of the liquid passage part. It can be removed. Thereby, it is possible to prevent the dialysate remaining in the fluid collection part from being mixed into the dialysate passing through the liquid passage part. Thereby, a clean dialysate can be supplied to a dialyzer.

  In addition, when the attaching / detaching means has a function of preventing the backflow of dialysate, for example, when the attaching / detaching means includes a backflow prevention valve, the dialysate remaining in the fluid collecting part or the liquid collecting part is removed. It is possible to regulate the dialysis fluid or the like that is passing through the backflow prevention valve so that it does not flow back to the liquid passage portion. Thereby, a clean dialysate can be reliably supplied to a dialyzer.

  The dialysate collection method according to claim 5 is a dialysate collection method for collecting dialysate supplied from the dialysate supply device to the dialyzer. The dialysate collection method includes a dialysate supply step and a dialysate collection step. In the dialysate supply step, the dialysate is supplied from the dialysate supply device to the dialyzer via a dialysate supply line connecting the dialysate supply device and the dialyzer. The dialysate collection step collects dialysate from a dialysate collection unit that is detachably disposed on the dialysate supply line.

  In this case, since the dialysate passing through the dialysate supply line can be collected from the dialysate collection unit detachably disposed on the dialysate supply line, dialysis supplied from the dialysate supply device to the dialyzer It can be checked whether the liquid is sanitary. Thereby, the sanitary state of a dialysate can be ensured and a clean dialysate can be supplied to a dialyzer.

  In the dialysate collection method according to claim 6, in the dialysate collection method according to claim 5, the dialysate is collected from the dialysate collection unit attached to the dialysate introduction port of the dialyzer. This step is realized in the dialysate collection step.

  In this case, by collecting the dialysate from the dialysate collection unit attached to the dialysate introduction port of the dialyzer, the dialysate supplied from the dialysate supply device to the dialyzer immediately before the dialysate flows into the dialyzer Can be inspected for hygiene.

  The dialysate collection method according to claim 7 is the dialysate collection method according to claim 6, wherein the dialysate collection unit connects the dialysate introduction port of the coupler and the dialyzer disposed in the dialysate supply line. Is collected. This step is realized in the dialysate collection step.

  In this case, since the dialysate collection unit can be easily attached to the coupler arranged in the dialysate supply line and the dialysate introduction port of the dialyzer, the dialysate supply immediately before the dialysate flows into the dialyzer Whether the dialysate supplied from the apparatus to the dialyzer is hygienic can be easily checked.

  In the dialysate collection method according to claim 8, in the dialysate collection method according to any one of claims 5 to 7, dialysis is performed by attaching an extraction means to a liquid collection unit provided in the dialysate collection unit. Liquid is collected. This step is realized in the dialysate collection step.

  In this case, the dialysate can be reliably collected from the dialysate collection unit by using extraction means such as a syringe or a suction device. That is, the dialysate necessary for the inspection can be reliably collected from the dialysate collection unit.

  In the dialysate collection unit according to the present invention, by placing the dialysate collection unit in the dialysate supply line, the dialysate can be collected from the solution collection section when the dialysate passes through the liquid passage section. . Thereby, it can be test | inspected whether the dialysate supplied to a dialyzer from a dialysate supply apparatus is hygienic. In the dialysate collection unit according to the present invention, clean dialysate can be supplied to the dialyzer by replacing the dialysate collection unit with a new one.

1 is a schematic view of a dialysis apparatus according to an embodiment of the present invention. The figure which shows a dialyzer and a dialysate collection unit. The figure which shows a dialysate collection unit. The figure which shows a coupler. The figure which shows a dialysate introduction port. The figure which shows the endotoxin filter and dialysate collection unit by other embodiment. The figure which shows the dialysate collection | recovery unit by other embodiment. The figure which shows the dialyzer by other embodiment.

  For example, as shown in FIG. 1, the dialysis device includes a dialysate supply device 1, a dialyzer 2, a dialysate supply line 3 for supplying dialysate to the dialyzer 2, and a dialysate recovery line for recovering dialysate from the dialyzer 2. 4 includes a dialysate circuit 5, an arterial extracorporeal circulation line 6 that guides blood from the dialyzed patient 100 to the dialyzer 2, and a venous extracorporeal circulation line 7 that returns dialyzed blood from the dialyzer 2 to the dialyzed patient 100. A circuit 8 and a dialysate collection unit 9 capable of collecting the dialysate supplied from the dialysate supply apparatus 1 to the dialyzer 2 are provided.

  The dialysate supply device 1 is not shown, for example, a blood water content measuring means, a temperature setting mechanism including a temperature sensor for monitoring and adjusting the temperature of the dialysate, a control means for controlling the flow rate of the dialysate flowing into the dialyzer 2, Dehydration mechanism that creates a pressure difference between the blood in the dialyzer 2 and the dialysate to move the water in the blood to the dialysate side (viscous chamber method, using a dehydration pump, etc.), extracorporeal circulation A blood pump for flowing blood into the blood circuit, and a control means for controlling the water removal mechanism, the blood pump, and the like are provided.

  For example, as shown in FIG. 2, the dialyzer 2 includes a housing 20, a blood introduction port 21, a blood discharge port 22, a dialysate introduction port 23, a dialysate discharge port 24, and a blood filtration filter 25. ing.

  The housing 20 is generally formed in a hollow cylindrical shape. The blood introduction port 21 is for guiding blood from the arterial extracorporeal circulation line 6 to the inside of the housing 20. The blood introduction port 21 is generally formed integrally with one end of the housing 20. The blood discharge port 22 is for discharging blood from the inside of the housing 20 to the venous side extracorporeal circulation line 7. The blood discharge port 22 is generally formed integrally with the other end of the housing 20. The dialysate introduction port 23 is for guiding the dialysate from the dialysate supply line 3 to the inside of the housing 20. The dialysate introduction port 23 is generally formed integrally with the outer peripheral surface on the other end side of the housing 20. The dialysate discharge port 24 is for discharging the dialysate from the inside of the housing 20 to the dialysate recovery line 4. The dialysate discharge port 24 is generally formed integrally with the outer peripheral surface on one end side of the housing 20.

  The blood filtration filter 25 is for removing waste products from the blood, and is disposed inside the housing 20. The blood filtration filter 25 is generally composed of a plurality of hollow fibers. The hollow fiber is formed in a tubular shape, and a plurality of pores (small holes) are provided on the tube wall of the hollow fiber. In such a blood filtration filter 25, when the blood passes through the hollow fiber tube, due to the diffusion effect, the waste contained in the blood passes through the hollow fiber pores, and the dialysate is discharged from the hollow fiber tube. It moves outside the pipe of the flowing hollow fiber. In this way, blood waste is filtered.

  The dialysate collection unit 9 is for collecting the dialysate supplied from the dialysate supply apparatus 1 to the dialyzer 2. As shown in FIG. 1, the dialysate collection unit 9 is disposed between the dialysate supply device 1 and the dialyzer 2. Specifically, the dialysate collection unit 9 is disposed on the dialysate supply line 3 connecting the dialysate supply apparatus 1 and the dialyzer 2.

  The dialysate collection unit 9 is detachably disposed on the dialysate collection line 4. As shown in FIG. 3, the dialysate collection unit 9 has a liquid passage part 190 through which the dialysate passes, and a liquid collection part 290 provided in the liquid passage part 190 for collecting the dialysate.

  The liquid passage part 190 is formed in a cylindrical shape. The first end 190 a of the liquid passage part 190 is detachably attached to the coupler 91, and the second end 190 b of the liquid passage part 190 is detachably attached to the dialysate introduction port 23.

  Specifically, the first end portion 190a of the liquid passage portion 190 is a male connector. At least one annular groove is formed on the outer peripheral surface of the first end portion 190 a of the liquid passage portion 190. Here, one annular groove 190 c is formed on the outer peripheral surface of the first end portion 190 a of the liquid passage portion 190. Further, a cylindrical projecting portion 190f having a diameter smaller than that of the liquid passage portion main body is formed at the distal end portion of the first end portion 190a of the liquid passage portion 190.

  Further, the second end portion 190b of the liquid passage portion 190 is a female connector. Furthermore, an extraction port 190 d for extracting the dialysate passing through the liquid passage portion 190 is provided on the outer peripheral surface of the liquid passage portion 190. The extraction port 190d is provided with an attaching / detaching means such as a disc valve 190e that can attach and detach the liquid collecting part 290 to and from the liquid passage part 190. The disc valve 190e regulates the means for detachably attaching the liquid collection part 290 to the liquid passage part 190, the means for restricting leakage of dialysate passing through the liquid passage part 190, and the backflow of dialysate passing through the liquid collection part 290. It is means to do.

  The liquid collection part 290 has a port mounting part 290a and a liquid extraction line 290b. The port mounting portion 290a is provided with a disk opening member 290c that can open the disk valve 190e. The disk opening member 290c is formed in a tubular shape, and allows dialysate to pass therethrough. The liquid extraction line 290b is formed in a tubular shape, and allows dialysate to pass therethrough. The liquid extraction line 290b can be equipped with an extraction means for extracting the dialysate, for example, a syringe or a suction device (not shown) for sucking the dialysate. The portion 290d (syringe mounting portion) where the syringe is mounted in the liquid extraction line 290b is desirably a luer lock type connector, for example.

  The coupler 91 is for arranging the dialysate collection unit 9 in the dialysate supply line 3 connecting the dialysate supply apparatus 1 and the dialyzer 2. The coupler 91 is generally formed in a cylindrical shape as shown in FIG. One end 91 a of the coupler 91 is attached to a tube for conveying the dialysate to the dialyzer 2. The other end 91b of the coupler 91 is usually a female connector. A first protrusion 91c that can engage with the annular groove 190c and a second protrusion 91f that can engage with the protrusion 190f are formed on the inner peripheral surface of the coupler 91 on the other end 91b side. Specifically, the first protrusion 91 c is formed in an annular shape on the inner peripheral surface of the coupler 91 on the other end 91 b side. The second protrusion 91f is formed in an annular shape on the inner peripheral surface of the substantially central portion of the coupler 91. Here, an example in which the first protrusion 91c and the second protrusion 91f are formed in an annular shape is shown, but the plurality of first protrusions 91c and the plurality of second protrusions 91f are spaced apart from each other. It may be formed in an annular shape.

  For example, as shown in FIG. 5, the dialysate introduction port 23 protrudes outward from the outer peripheral surface of the housing 20 of the dialyzer 2 and is integrally formed with the housing 20 of the dialyzer 2. The dialysate introduction port 23 is formed in a cylindrical shape. The base end portion 23b of the dialysate introduction port 23 is integrally formed with the housing 20 of the dialyzer 2, and the end portion 23a of the dialysate introduction port 23 is a male connector.

  In the dialysis machine as described above, the dialysate is collected by disposing the dialysate collection unit 9 in the dialysate supply line 3.

  In the present embodiment, first, one end 91 a of the coupler 91 is attached to a tube constituting the dialysate supply line 3. Next, in order to arrange the dialysate collection unit 9 in the dialysate supply line 3, the first end 190 a of the fluid passage portion 190 is fitted to the other end 91 b of the coupler 91. For example, the annular groove 190 c on the outer peripheral surface of the liquid passage portion 190 and the protruding portion 190 f at the tip portion of the liquid passage portion 190 are fitted to the first protrusion portion 91 c and the second protrusion portion 91 f on the inner peripheral surface of the coupler 91. Accordingly, the first end portion 190a of the liquid passage portion 190 is fitted and elastically locked inside the coupler 91 on the other end 91b side. Thereby, the movement of the dialysis fluid collection unit 9 with respect to the coupler 91 in the detaching direction can be restricted. Subsequently, the second end portion 190 b of the fluid passage portion 190 is fitted into the end portion 23 a side of the dialysate introduction port 23. As described above, the dialysate can be supplied from the dialysate supply device 1 to the dialyzer 2 by disposing the liquid passage portion 190 of the dialysate collection unit 9 in the dialysate supply line 3.

  Subsequently, in the dialysate collection unit 9, the port attachment portion 290 a of the liquid collection portion 290 is attached to the extraction port 190 d of the liquid passage portion 190, so that the liquid extraction line 290 b is outward from the outer peripheral surface of the liquid passage portion 190. The liquid collection part 290 is attached to the liquid passage part 190 in a state where the liquid collection part 190 projects.

  Specifically, a female screw is provided on the inner wall of the port mounting part 290a of the liquid collection part 290, and a male screw is provided on the outer wall of the extraction port 190d of the liquid passage part 190. For this reason, the liquid collection part 290 is attached to the liquid passage part 190 by screwing the port attachment part 290a of the liquid collection part 290 into the extraction port 190d of the liquid passage part 190.

  Here, when the liquid collection part 290 is attached to the liquid passage part 190, the tubular disk release member 290c provided in the port attachment part 290a of the liquid collection part 290 presses the disk valve 190e, and the disk valve 190e Open. Then, the liquid passage part 190, the disk opening member 290c, and the liquid extraction line 290b communicate with each other. Then, when the dialysate passes through the liquid passage part 190, the dialysate flows from the liquid passage part 190 into the disc opening member 290c and the liquid extraction line 290b. Then, a syringe is mounted on the syringe mounting portion 290d, and the dialysate is sucked and collected using this syringe.

  When the liquid collection part 290 is attached to the liquid passage part 190 and the liquid collection part 290 is removed from the liquid passage part 190, the disk release member 290c is removed from the disk valve 190e and the disk valve 190e is closed. Thereby, the liquid leakage from the liquid collection part 290 can be prevented.

  As described above, when the dialysate collection unit 9 is attached to the coupler 91 and the dialysate introduction port 23, when the dialysate is supplied from the dialysate supply device 1 to the dialyzer 2, the dialysate collection unit 9 The dialysate passing through the nine fluid passage portions 190 can be collected from the fluid collection portion 290 of the dialysate collection unit 90. Thereby, it can be test | inspected whether a dialysate is hygienic. When the dialysate is hygienic, clean dialysate is supplied to the dialyzer by washing the inside of the dialysate collection unit 9 or replacing the dialysate collection unit 90 with a new one. Can do. Further, in this case, a clean dialysate can be supplied to the dialyzer by washing the members in the vicinity of the dialysate collection unit 90, such as the coupler 91 and the dialysate introduction port 23 at the same time.

  In the dialysis apparatus as described above, the dialysate supplied from the dialysate supply apparatus 1 and the blood are brought into contact with each other in the dialyzer 2 to move and / or exchange substances or the like in the blood. . This process is usually called “dialysis”. As the dialysate that can be used in this case, those usually used in the dialysis step, for example, acetic acid-based dialysate, bicarbonate-based dialysate, and the like are used.

[Other Embodiments]
(A) In the said embodiment, although the example in case the dialysate collection | recovery unit 9 was mounted | worn with the dialyzer 2 was shown, as shown in FIG. 6, the dialysate collection | recovery unit 9 removes an impurity from a dialysate. For example, an endotoxin filter 30 for removing endotoxin from the dialysate may be attached. The endotoxin filter 30 shown in FIG. 6 is disposed between the dialysate supply device 1 and the dialyzer 2. The dialysate collection unit 9 is attached to the endotoxin filter 30 and the coupler 91, and connects the endotoxin filter 30 and the coupler 91. The coupler 91 is attached to the dialysate collection unit 9 and a tube (not shown) for conveying the dialysate to the dialyzer 2 to connect the dialysate collection unit 9 and the tube. Thus, even when the dialysate collection unit 9 is attached to the endotoxin filter 30, the same effect as in the above embodiment can be obtained. In FIG. 6, members corresponding to the embodiment are given the same numbers as in the embodiment.
(B) In the above-described embodiment (including the other embodiments described above), in the dialysate collection unit 9, an example in which the liquid collection unit 290 is detachable from the extraction port 190 d of the liquid passage unit 190 has been described. As shown in FIG. 7, the liquid collection part 290 may be formed integrally with the liquid passage part 190. In this case, the liquid collection part 290 is formed integrally with the liquid passage part 190 projecting outward from the outer peripheral surface. Thus, also when the liquid collection part 290 protrudes outward from the outer peripheral surface of the liquid passage part 190 and is integrally formed, the same effect as in the above embodiment can be obtained. In FIG. 7, the same members as those in the embodiment are given the same numbers as those in the embodiment.
(C) In the above embodiment, the dialysate is collected and inspected by the dialysate collection unit 9 immediately before the dialysate flows into the dialyzer 2. As a form similar to the above embodiment, the dialysate may be collected immediately after the dialysate flows into the dialyzer 2, as shown in FIG. As an example of this case, as shown in FIG. 8 (a), a dialysate collection port for collecting dialysate, that is, a dialysate collection port 40, is formed integrally with the dialysate introduction port 23 of the dialyzer 2. May be. In this case, since the dialysate can be collected and tested immediately after the dialysate flows into the dialysate introduction port 23, a clean dialysate can be reliably supplied to the dialyzer.

  As a reference example, as shown in FIG. 8B, when the dialysate collection port 40 is formed integrally with the housing 20 in the vicinity of the dialysate introduction port 23 of the dialyzer 2, immediately after the dialysate flows into the dialyzer 2. Since the dialysate can be collected and inspected, a clean dialysate can be reliably supplied to the dialyzer.

  In FIG. 8, the same members as those in the above embodiment are given the same numbers as in the above embodiment.

  The present invention can be used in a dialysis apparatus for dialysis patients who undergo dialysis. For example, it can be used effectively for replenishment fluid when using online HDF.

DESCRIPTION OF SYMBOLS 1 Dialysate supply apparatus 2 Dializer 3 Dialysate supply line 9 Dialysate collection unit 23 Dialysate introduction port 91 Coupler 190 Liquid passage part 190c Annular groove 290 Liquid collection part

Claims (8)

A dialysate collection unit capable of collecting dialysate supplied from a dialysate supply device to a dialyzer,
A dialysate supply line connecting the dialysate supply device and the dialyzer is detachably disposed, and a liquid passage part through which the dialysate passes;
A liquid collection part for collecting the dialysate provided in the liquid passage part;
A dialysate collection unit comprising: The first end of the cylindrical liquid passage part is a male connector, the second end of the cylindrical liquid passage part is a female connector,
The first end is detachably attached to a coupler, and the second end is detachably attached to a dialysate introduction port of the dialyzer.
The dialysate collection unit according to claim 1. An extraction port for extracting the dialysate passing through the liquid passage part is provided on the outer peripheral surface of the liquid passage part,
The liquid sampling part is detachably attached to the extraction port of the liquid passage part.
The dialysate collection unit according to claim 1 or 2. The extraction port of the liquid passage part has attachment / detachment means for attaching / detaching the liquid collection part,
The dialysate collection unit according to claim 3. A dialysate collection method for collecting dialysate supplied from a dialysate supply device to a dialyzer,
A dialysate supply step of supplying the dialysate from the dialysate supply device to the dialyzer via a dialysate supply line connecting the dialysate supply device and the dialyzer;
A dialysate collection step for collecting the dialysate from a dialysate collection unit detachably disposed in the dialysate supply line;
And a dialysate collection method. In the dialysate collection step, the dialysate is collected from the dialysate collection unit attached to the dialysate introduction port of the dialyzer,
The dialysate collection method according to claim 5. In the dialysate collection step, the dialysate is collected from the dialysate collection unit connecting the coupler disposed in the dialysate supply line and the dialysate introduction port of the dialyzer,
The dialysate collection method according to claim 6. In the dialysate collection step, the dialysate is collected by attaching an extraction means to the liquid collection unit provided in the dialysate collection unit.
The dialysate collection method according to any one of claims 5 to 7.

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