Fluid bag for dialysis treatment

Abstract

The present disclosure relates to a fluid bag, especially fluid bag for fluid treatment, especially dialysis treatment of patient, with an additional film within the bag, the additional film being a separating wall within the bag and thereby forming at least a first compartment and as second compartment.

Description

[0001] DTS Ref.: 39672.ADT.P110PC

[0002] 26.11.2025

[0003] - 1 -

[0004] Fluid bag for dialysis treatment

[0005] The present disclosure relates to a fluid bag for a fluid treatment of a patient, especially dialysis treatment.

[0006] When using dialysis machines, there are two basic ways of supplying them with the required fluids, in particular liquids, to produce the dialysate or finished dialysate liquids. Furthermore, the toxin-loaded fluid, i.e. the dialysate, must be disposed after being in contact with the human blood or a biological fluid via the membrane in the dialyzer. The basic concepts available here in the state of the art are, on the one hand, the use of a ring line, i.e. the device is connected to a central water supply. The used or toxin-loaded dialysate is also disposed of via a further connection in the line. In addition, concentrates, especially in canisters of approx. 5 liters, are connected to the device. In this way, the dialysis concentrate is mixed with the osmosis water from the central supply line in the device to form a solution, which then produces the dialysis fluid. Another common solution used today is dialysis machines with ready-made dialysis solutions. These are mainly used in intensive care units where there is no central water supply. The ready-to-use dialysis solutions used here are usually provided in bags, especially foil bags. In order to facilitate the handling, carrying and application of these bags, only foil bags with up to five liters or a maximum of 10 liters are usually used. However, as high volumes of fluids are required for dialysis treatments, treatment on intensive care units with these small bags is very staffintensive as these fluid bags need to be changed frequently. The aim is therefore to use a fluid bag with the largest possible filling volume. Preferably larger than 20 liters, more preferably larger than 50 liters and even more preferably lager than 75 liters. Furthermore, the used dialysate must be disposed of again, for which a fluid bag with a filling volume of a similar size is also preferred. In order to facilitate the handling, carrying and connecting of these large fluid bags, a container is preferably used to hold the fluid bag. It is therefore preferable to use a hygienic fluid bag that requires very little material and is in direct contact with the liquid on the one side and on the other side with a container that can hold this fluid bag and transport it by the user. DTS Ref.: 39672.ADT.P110PC

[0007] 26.11.2025

[0008] - 2 -

[0009] Such a container makes it possible for a thin film, which would not be able to withstand the forces of large volumes of fluid, to be sufficient to safely transport the fluids for dialysis. Preferably, such a container is therefore mobile and can be equipped with one or more fluid bags and can hold the fluids required for dialysis, which are needed to produce the dialysate and which accumulate again as waste from dialysis. Such a mobile container with reservoirs, preferably bags for liquids, is described in WO2017158392A1.

[0010] It is an object of the present disclosure to present a fluid bag and a system with such a fluid bag which is safe to handle, ensures stability of the stored fluid and allows at least on full treatment of a patient.

[0011] This object is solved by a fluid bad with the features of claim 1 . Accordingly, a fluid bag is disclosed, especially fluid bag for fluid treatment, especially dialysis treatment of patient, with an additional film within the bag, the additional film being a separating wall within the bag and thereby forming at least a first compartment and as second compartment.

[0012] This way a fluid bag is provided which is safe to handle, ensures stability of the stored fluid and allows at least on full treatment of a patient.

[0013] It is further possible that the fluid bag is made of films.

[0014] Moreover, it is possible that the fluid bag is made of at least three films connected with each other, especially wherein the three films form the side walls and the inner separating wall of the bag.

[0015] The two outer films can be separate films. However, it is also possible that they are one film which is folded so that sheet sections of the film lie upon each other.

[0016] In order to avoid the above described problems of the film bag with each other and with a container for storing and holding the fluid bag, a single film bag is disclosed and suggested here.

[0017] The movement of the films or bags against each other and the movement of the films or bags against the wall of the container, in particular the mobile container, is prevented by using only a single bag which, when filled, completely fills the walls of the container DTS Ref.: 39672.ADT.P110PC

[0018] 26.11.2025

[0019] - 3 - with its outer films. The at least two or more liquids are separated from each other by an additional film in the middle of the one bag.

[0020] For example, three identically sized films are placed on top of each other and welded to form a sandwich of three films. This results in two outer films and at least one inner film. These two outer films are in contact with the container holding the film bag in particular, whereas the inner film is only located between the two outer films and is therefore only in fluid contact.

[0021] Further, it is possible that the films are connected via a material-connection, especially are welded and / or glued to each other.

[0022] Moreover, it is possible that the films are connected at and / or adjacent their outer borderlines with each other.

[0023] Additionally, it is possible that the fluid bag size is dimensioned such that its outer walls will fit into a container with rigid walls, wherein the container is designed to hold the fluid bag.

[0024] Further, the films can be transparent or at least partially transparent.

[0025] The present disclosure also relates to a system comprising at least one fluid bag and at least one container, wherein the container is designed to hold the fluid bag.

[0026] Further possible aspects are as follows:

[0027] A fluid access for filling with fresh water and removing the osmosis water for dialysis can be preferably located between the 1stfoil / sheet and 2ndfoil / sheet. This is preferably a tube for osmosis water. Whereas between the 2ndfoil / sheet and 3rdfoil / sheet there is preferably a fluid access for filling with waste water or filtrate during treatment. This is preferably a tube for the dialysate used. DTS Ref.: 39672.ADT.P110PC

[0028] 26.11.2025

[0029] - 4 -

[0030] This, for example, results in a single bag with at least two separate chambers, each of which has at least one separate fluid inlet or outlet for a liquid.

[0031] Further, the fluid inlet or outlet could be single separated tubes or one single connection line containing separate fluid channels.

[0032] Foils and can completely line the inside of the container in any filled state. Also, the foil “floats freely” between the two “outside” foils and is completely inside the liquids.

[0033] If more additional liquid is now removed from or added to one of the two compartments, the middle foil moves from the side of the first outside foil to the side of second outside foil, for example, depending on the fill level of the two compartments.

[0034] If the total fill volume of the two compartments, i.e. the chamber between first outside foil and the middle foil, the chamber between the middle foil and second outside foil, remains almost constant, i.e. the sum of the two volumes, only the middle foil moves within the liquids, but none of the three foils moves in direct contact with the container.

[0035] In the specific application for dialysis, the chamber between the first outside foil and the middle foil is preferably filled with liquid at the beginning of using the foil bag, whereas the chamber between the middle foil and second outside is completely empty.

[0036] In the course of the treatment, the fluid can be continuously removed from the chamber between first outside film and middle film and fed to the dialysis machine, brought into contact with the blood and or a biological solution via a membrane and continuously fed to the chamber between the middle film and the second outside film as toxin-loaded dialysate.

[0037] In simple terms, the fluid is continuously removed from the chamber between film the first outside film and the middle film and then returned to the chamber between the middle film and second outside film.

[0038] Further details and advantages of the present disclosure shall be described in connection with the drawings.

[0039] It is shown in DTS Ref.: 39672.ADT.P110PC

[0040] 26.11.2025

[0041] - 5 -

[0042] Fig. 1 a mobile container with reservoirs as already disclosed by WO2017158392A1 (prior art);

[0043] Fig. 2 an embodiment of the bag according to the present disclosure;

[0044] Fig .3 a schematical overview of a fluid treatment system, which is using the bag of Fig. 2 as a disposable;

[0045] Fig. 4a-b the fluid bag of Fig. 2 in a container;

[0046] Fig. 5a-c the fluid bag of Fig. 2 in a container in various situations;

[0047] Fig. 6 a schematical view on the fluid bag according to the present disclosure;

[0048] Fig. 7a-b further schematical views on the fluid bag according to the present disclosure;

[0049] Fig. 8a-b a front view (Fig. 8a) and a side view (Fig. 8b) of container with the fluid bag according to the present disclosure

[0050] Fig. 9a-b a perspective view on the container with the fluid bag according to the present disclosure; and

[0051] Fig. 10a-b a perspective view on the container with the fluid bag according to the present disclosure.

[0052] Fig. 1 shows Fig. 18 disclosed in WO2017158392A1 and a schematical overview of a container 100.

[0053] The reference signs used in the following description of Fig. 1 of this disclosure are referring to the listed reference signs of WO2017158392A1.

[0054] The container 100 is on two rollers 112.

[0055] Furthermore, the container 100 comprises further several bags, i.e. smaller bags 93, 94, 95, and larger bags, i.e. a first (large) bag 101 and second (large) bag 102.

[0056] The first (large) bag 101 is stacked on top of the second (large) bag, which is the osmosis water bag 102.

[0057] The first and second bag 101 , 102 are similar in size and volume. DTS Ref.: 39672.ADT.P110PC

[0058] 26.11.2025

[0059] - 6 -

[0060] The smaller bags 93, 94, are the third and the fourth bag, and are stacked on top of the first bag 101 . The smaller bags 93, 94 have around half of the size and volume of the first bag 101.

[0061] Finally, another smaller bag 95 is stacked on top of the further bags 93, 94.

[0062] The width and length of this fifth bag 95 is similar to the width and length of the first and second bags 101 , 102. However, the height of the fifth bag 95 is approx, a third of the height of the first and second bag 101 , 102. Thus, the volume of the fifth bag 95 is approx, a third of the volume of the first and second bag 101 , 102.

[0063] Hence, on the bottom of the container 100 there is the second bag 102.

[0064] On top of the second bag 102 there is the first bag 101 .

[0065] Between the first bag 101 and the side part of the container 100 there is a fluid outlet 103.

[0066] Further, on top of the first bag 101 there is on one side the further bag 94 and on the other side the further bag 93.

[0067] On top of the two further bags 93, 94 there is another further fifth bag 95.

[0068] The size of the bags 102, 101 , 93, 94, 95 is decreasing from bottom to top.

[0069] The second bag 102 comprises the same length compared to the first bag 101 , but the height is slightly higher compared to the first bag 101.

[0070] Hence, the volume of the first bag 101 is slightly smaller compared to the volume of the second bag 102.

[0071] The third and fourth bags 93, 94 have the same volume.

[0072] Each of the further bags 93, 94 comprises a smaller length compared to the first bag 101 or second bag 102, but comprises an equal (or similar) height compared to the first bag 101 or second bag 102.

[0073] Hence, the volume of each of the third or fourth bags 93, 94 is smaller compared to the area of the first bag 101 or second bag 102.

[0074] The fifth bag 95 comprises the length of the first reservoir 101 or second bag 102, but the fifth bag 95 comprises a smaller height than the first bag 101 or second bag 102. DTS Ref.: 39672.ADT.P110PC

[0075] 26.11.2025

[0076] - 7 -

[0077] Hence, the further bag 95 comprises a smaller area compared to the first bag 101 or second bag 102.

[0078] The bags 102, 101 , 93, 94, 95 are slightly tilted and are positioned in a certain angle to the container 100.

[0079] In Fig. 2 a film bag 330 is shown.

[0080] The film bag 330 comprises an octagonal shape.

[0081] Furthermore, the shape of the film bag 330 can be divided into a rectangular part and two trapezoidal parts, building together an octagon.

[0082] The two trapezoids are equal in their length dimensions 312, 314, 316, 341 and equal in their angles 313, 315, in particular in a second and third angle 313, 315.

[0083] The two trapezoids are mirrored.

[0084] Each of the trapezoidal parts of the film bag 330 is oriented as such that the base of the trapezoid lies along the longer side of the rectangular part of the film bag 330.

[0085] Further, the trapezoidal part of the film bag 330 can be defined with a base, which is the longest side of the trapezoid, and an upper part of the trapezoid, which is the third side length of the film bag and a height of the film bag 314.

[0086] The height of the trapezoidal part is defined by a length of the leg 341 .

[0087] Furthermore, the trapezoidal part comprises two side lengths of the film bag 312, 316, i.e a first side length of the film bag 312 and a second side length of the film bag 316.

[0088] The rectangular part of the film bag comprises a bottom / top side length of the film bag 310.

[0089] Consequently, the angle between the first side length of the film bag 312 and the bottom side length of the film bag 310 is defined as a first angle of the film bag 311 .

[0090] Whereas the angle between the second side length of the film bag 316 and the top side length of the film bag 310 is defined as the fourth angle of the film bag 317.

[0091] The bottom / top side length of the film bag 310 is smaller compared to the height of the rectangular part, which is the base of the trapezoidal part of the film bag 330. DTS Ref.: 39672.ADT.P110PC

[0092] 26.11.2025

[0093] - 8 -

[0094] At the top of the rectangular part of the film bag 330 two eyelets 318, 322, in particular, a first eyelet 318 and a second eyelet 322 are comprised

[0095] Between the two eyelets 322, 318 a weld seam 340 is shown.

[0096] Perpendicular to the weld seam 340 three tubes 325, 328, 329 cross the film bag 330.

[0097] The tube 325 is the first tube 325, the tube 328 is the second tube 328 and the tube 329 is the third tube 329.

[0098] The third tube 329 is aligned next to the second eyelet 322 and the second tube 328 is aligned next to the first eyelet 318.

[0099] Between the second and the third tubes 328, 329 there is the first tube 325.

[0100] The outer second and third tubes 328, 329 show equal shape and size.

[0101] Moreover, the second and third tubes 328, 329 are half outside the film bag 330 and half inside the rectangular part of the film bag 330.

[0102] At the end of each outer part of the second and third tube 328, 329 a fluid in let / outlet 103,101 is comprised.

[0103] Whereas on the end of the inner part of the second and third tube 328, 329 the second and third tube 328, 329 shows a spiral and screw-like shape.

[0104] Compared to the second and third tubes 328, 329 the tube first 325 comprises a different shape and size.

[0105] The first tube 325 is narrower compared to the second and third tubes 328, 329.

[0106] Additionally, the first tube 325 is longer compared to the second and third tubes 328, 329.

[0107] Nevertheless, the first tube 325 comprises a part of the tube that is aligned outside of the film bag 330 and a part that is inside the rectangular part of the film bag 330.

[0108] At the end of the outer part of the first tube 325 there is a fluid inlet 102.

[0109] Moreover, at the end of the inner part of the first tube 325, the end of the first tube 325 is surrounded by a second foam filter 326.

[0110] Further, the inner part of the first tube 325 is fully aligned within a third compartment 69. DTS Ref.: 39672.ADT.P110PC

[0111] 26.11.2025

[0112] - 9 -

[0113] The third compartment 69 comprises bicarbonate 332.

[0114] Furthermore, the third compartment 69 for bicarbonate 332 comprises a further fourth tube 71 .

[0115] The fourth tube 71 is aligned between the first tube 325 and the third tube 328.

[0116] In contrast to the second, third, and first tubes 328, 329, 325, the fourth tube 71 is not crossing the weld seam 340.

[0117] Hence, the fourth tube 71 is fully aligned inside the rectangular part of the film bag 330.

[0118] Still, the fourth tube 71 is crossing the third compartment 69 for bicarbonate 332 at the bottom of the third compartment 69.

[0119] Therefore, the end of the bottom part of the fourth tube 71 is aligned in the rectangular part of the film bag 330.

[0120] The upper end of the fourth tube 71 is aligned within a first foam filter 323, wherein both are aligned within the third compartment 69 for bicarbonate 332.

[0121] Fig. 3 shows an exemplary schematical overview of a fluid treatment system, which is using the bag of Fig. 2 as a disposable.

[0122] Fig. 3 shows one embodiment of the claimed invention.

[0123] The embodiment comprises a patient 1 that is connected to a dialysis device 100, and in particular to a dialyzer 10.

[0124] The embodiment of the invention comprises multiple circuits and fluid paths, in particular a first blood line 2, a second blood line 16, a first fluid connection 30, a second fluid connection 76, a first regeneration circuit 43, a second regeneration circuit 44, a circuit 63, a fluid connection block 75, a dialysate inlet 19 and a dialysate outlet 20.

[0125] Moreover, the system comprises a plurality of reservoirs and chambers, including a first reservoir 4, a second reservoir 13, a third reservoir 25, a fourth reservoir 26, a fifth DTS Ref.: 39672.ADT.P110PC

[0126] 26.11.2025

[0127] - 10 - reservoir65, a sixth reservoir 66, a seventh reservoir 67, an eighth reservoir 68, a ninth reservoir 69 and a tenth reservoir 70, a second fluid compartment 72 and a fluid bag 73A.

[0128] Additionally, the device comprises multiple pumps, as a first metering pump 27, a second metering pump 47, a third metering pump 48, a fourth metering pump 49, a fifth metering pump 50, a sixth pump 77, a first regeneration pump 39, a second regeneration pump 40, a first infusion pump 6, a second infusion pump 15, a first dialysate pump 18, a second dialysate pump 21 , a first waste pump 35 and a second waste pump 36.

[0129] Furthermore, the system comprises multiple sensors, in particular a first sensor 5, a second sensor 7, a third sensor 9, a fourth sensor 11 , a fifth sensor 14, a sixth sensor 17, an eighth sensor 41 , a ninth sensor 42, a tenth sensor 58, an eleventh sensor 61 , a twelfth sensor 78, and a seventeenth sensor 84.

[0130] The device comprises a valve circuit 37 and additionally multiple valves, as a first bypass valve 22, a second bypass valve 22A, a third bypass valve 22B, a fourth valve 31 , a fifth valve 32, a sixth valve 86, a first switching valve 45, a second switching valve 46, and a single pass outlet valve 29.

[0131] Additionally, the system comprises several gas separators, a first gas separator 51 , a second gas separator 52, a third gas separator 53, a fourth gas separator 54, a fifth gas separator 55, a sixth gas separator 56 and a seventh gas separator 57.

[0132] Furthermore, the system comprises heating elements as a first heater 23, a second heater 38, a third heater 62 and a heat exchanger 64.

[0133] The system further comprises a first filter 33, a second filter 34 and a third filter 87.

[0134] Moreover, the system comprises a container 73, a scale 74 and a control mechanism 59.

[0135] A first circuit comprises extracorporeal blood lines 2, 16 connecting a patient 1 to a dialyzer 10.

[0136] In addition a second circuit connects the dialyzer 10 to a third reservoir 25. DTS Ref.: 39672.ADT.P110PC

[0137] 26.11.2025

[0138] - 11 -

[0139] Besides, a third circuit connects the third reservoir 25 with a detoxification unit 33, 34 over recirculation paths 43, 44.

[0140] Further fluid paths, in particular acidic, alkaline, waste, permeate and bicarbonate paths are connected to the circuits.

[0141] A patient 1 is connected via an extracorporeal first blood line 2 to a dialyzer 10 and further from the dialyzer 10 via an extracorporeal second blood line 16 back to the patient 1 building a first circuit.

[0142] The first circuit comprises a feeding the first blood line 2 that starts at the patient 1 and ends at the dialyzer 10.

[0143] The first blood line 2 comprises a first blood line infusion connection 3 between the patient 1 and the dialyzer 10. This first blood line infusion connection 3 connects the first blood line 2 to a first infusion solution fluid bag 4.

[0144] Between the first blood line infusion connection 3 and the first infusion solution fluid bag 4 is a first infusion pump 6.

[0145] Between the first infusion pump 6 and the first infusion solution fluid bag 4 is a first sensor 5.

[0146] The infusion solution of the first infusion solution fluid bag 4 is supplied into the extracorporeal first blood line 2 at a first blood line infusion connection 3.

[0147] The infusion solution further flows through the first infusion pump 6.

[0148] Between the first blood line infusion connection 3 and the dialyzer 10 along the extracorporeal first blood line 2 is a second sensor 7.

[0149] Further upstream there is a blood pump 8 and a further upstream there is a third sensor 9.

[0150] The first blood line 2 splits into two directions between the third sensor 9 and the dialyzer 10.

[0151] In one direction the blood flows through one dialyzer 10 and in one direction the blood flows through another dialyzer 10, as the dialyzers 10 are set in parallel.

[0152] The fluid enters, passes through and leaves the dialyzer 10. DTS Ref.: 39672.ADT.P110PC

[0153] 26.11.2025

[0154] - 12 -

[0155] The fluid line leaving dialyzer 10 and dialyzer 10 merge at a connection point to the second blood line 16.

[0156] The first circuit comprises the second blood line 16 going back to the patient 1. This second blood line 16 starts at the dialyzer 10 and ends at the patient 1 .

[0157] Along the second blood line 16, in particular between the dialyzer 10 and the patient 1 , there is a second blood line infusion connection 12.

[0158] Between the second blood line infusion connection 12 and the dialyzer 10 there is a fourth sensor 11.

[0159] The second blood line infusion connection 12 connects the second blood line 16 to a second infusion solution fluid bag 13.

[0160] Between the second blood line infusion connection 12 and the second infusion solution fluid bag 13 is a second infusion pump 15.

[0161] Between the second infusion pump 15 and the second infusion solution bag 13 there is a fifth sensor 14.

[0162] The infusion solution of the second infusion solution fluid bag 13 is supplied into the extracorporeal second blood line 16 via the second blood line infusion connection 12 via the second infusion pump 15.

[0163] On one side the dialyzer 10 is directly connected to the extracorporeal blood lines 2, 16.

[0164] In particular, one end of this one side of the dialyzer 10 is directly connected to the first blood line 2 coming from the patient and the other end of this one side is connected to the second blood line 16 directing the flow back to the patient.

[0165] Therefore, the dialyzer 10 is on one side connected to the first circuit.

[0166] On the other side the dialyzer 10 is connected to the second circuit.

[0167] The second circuit starts at the dialyzer 10 and ends at the dialyzer 10.

[0168] The second circuit flows through the third reservoir 25.

[0169] Further fluid paths split off from the second circuit. DTS Ref.: 39672.ADT.P110PC

[0170] 26.11.2025

[0171] - 13 -

[0172] Between the dialyzer 10 and the third reservoir 25 the dialysate flows through a dialysate outlet 20 from the dialyzer 10, further through a third bypass valve 22B, and following through a second dialysate pump 21 , through a seventh sensor 24 and further through a first heater 23 towards the third reservoir 25.

[0173] Between the first heater 23 and the third reservoir 25 is a first fluid connection 30 leading towards the fluid waste bag 72.

[0174] In particular, the first fluid connection 30 is a waste path.

[0175] Between the first heater 23 and the third reservoir 25 - in particular between the first fluid connection 30 of the waste path and the third reservoir 25 - is a fluid connection leading to a third circuit.

[0176] The dialysate flow is partially or completely flowing into the dialysate third reservoir 25 or is partially or completely flowing into the third circuit or into the waste path.

[0177] The fluid flows from the reservoir to the dialyzer 10 through a sixth sensor 17, through a first dialysate pump 18, further through a second bypass valve 22A towards a dialysate inlet 19 at the dialyzer 10.

[0178] Between the second bypass valve 22Aand the dialysate inlet 19 there is a second fluid connection 76.

[0179] In particular, the second fluid connection 76 is a waste path.

[0180] The dialysate inlet 19 and the dialysate outlet 20 can be connected in a way, that the blood flow 2, 10, 16 and the dialysate flow entering, passing through and leaving the dialyzer are going completely in the same direction or in the opposite direction.

[0181] In parallel to the dialyzer 10 there is a first bypass valve 22 and fluid path. The fluid path is connecting to the second fluid circuit on one end between the third bypass valve 22B and the second dialysate pump 21 and on the other end between the second bypass valve 22A and the first dialysate pump 18. Along this fluid path there is the first bypass valve 22.

[0182] The third circuit, starts from the fluid flow of the second circuit and flows over pumps 39, 40 and ends at the third reservoir 25. DTS Ref.: 39672.ADT.P110PC

[0183] 26.11.2025

[0184] - 14 -

[0185] Between the one end of the third circuit - between the third reservoir 25 and the first heater 23 - and the regeneration pumps 39, 40 is a connection point 79.

[0186] This connection point 79 is connecting the dialysate flow with a fluid bag 26. The infusion solution 26 from the fluid bag 26 flows through a sensor system 26 through a first metering pump 27 to the fluid connecting point 79.

[0187] Further upstream the connecting point 79 towards the regeneration pumps 39, 40 the flow is split into two directions. In one direction the fluid flows towards a first regeneration pump 39, building a fluid path 43 and a first recirculation circuit 43.

[0188] In the other direction the fluid flows towards a second regeneration pump 40, building a fluid path 44 and a second recirculation circuit 44.

[0189] The fluid in the first recirculation path 43 is directed further away from the pump 39 towards the eighth sensor 41 to a first filter 33. This first filter 33 is a first detoxification unit 33.

[0190] The fluid flows into the first detoxification unit 33, through the first detoxification unit 33 and out of the first detoxification unit 33.

[0191] The fluid flows out of the first detoxification unit 33 in two directions.

[0192] In one direction the fluid flows from the first detoxification unit 33 through a waste pump 35 into the fluid connection between the second detoxification unit 34 and the fluid waste bag 72. In particular the fluid connects between a waste pump 36 and the fluid connection block 75. The fluid further flows through the fluid connection block 75 into the fluid waste bag 72.

[0193] In a second direction, the fluid flows from the first detoxification unit 33 through a fourth valve 31 towards a valve circuit 37. The valve circuit 37 is a mixing point 37.

[0194] The fluid of the second recirculation path 44 continues further the pump 40 towards the ninth sensor 42 to a second filter 34. This second filter 34 is a second detoxification unit 34.

[0195] The fluid is then directed into the second detoxification unit 34, through the second detoxification unit 34 and further out of the second detoxification unit 34.

[0196] The fluid flows out of the second detoxification unit 34 in two directions. DTS Ref.: 39672.ADT.P110PC

[0197] 26.11.2025

[0198] - 15 -

[0199] In one direction the fluid flows from the second detoxification unit 34 through the waste pump 36 and further flows through the fluid connection block 75 into the fluid waste bag 72.

[0200] In a second direction, the fluid flows from the second detoxification unit 34 through a fifth valve 32 towards the valve circuit 37. The valve circuit 37 is the mixing point 37.

[0201] At the mixing point 37 the first recirculation circuit 43 and the second recirculation circuit 44 meet. In particular, at the mixing point 37 the fluid flowing out of the first detoxification unit 33 and out of the second detoxification unit 34 meet and the two fluid connections get merged to one fluid connection.

[0202] From the mixing point 37 the one fluid connection leads over a second heater 38 towards the third reservoir 25 and into the third reservoir 25. At this point the third circuit and the second circuit meet. In particular, the third circuit end at that point.

[0203] The device comprises two concentrate containers 65, 67 which are connected to the recirculation paths 44, 43.

[0204] The concentrate container 65 comprises an acid solution 65.

[0205] The acid solution 65 flows from the concentrate container 65 through a first gas separator 51 through a third metering pump 48 into the first recirculation path 43. This fluid path is the acidic path. The acidic path starts at the concentrate container 65 and ends at the first recirculation circuit 43 between the pump 39 and the eighth sensor 41 .

[0206] The concentrate container 67 comprises a base solution 67.

[0207] The base solution 67 flows from the concentrate container 67 through a second gas separator 52 through a second metering pump 47 into the second recirculation path 44. This fluid path is the alkaline path. The alkaline path starts at the concentrate container 67 and ends at the second recirculation path 44 between the pump 40 and the ninth sensor 42.

[0208] Between the acidic path and the alkaline path there is a switching mechanism 45, 46.

[0209] The switching mechanism 45, 46 comprises two switching valves 45, 46. DTS Ref.: 39672.ADT.P110PC

[0210] 26.11.2025

[0211] - 16 -

[0212] The first switching valve 45 is set between the second metering pump 47 along the alkaline path and the second recirculation path 44, in particular between the ninth sensor 42 and the pump 40.

[0213] The second switching valve 46 is set between the third metering pump 48 along the acidic path and the first recirculation path 43, in particular between the eighth sensor 41 and the pump 39.

[0214] A container 73 comprises a chamber for waste fluid 72, a chamber for permeate 70, a chamber for bicarbonate 69, a powder bag 68 and another powder bag 66.

[0215] Additionally, the container 73 comprises a fluid bag 330.

[0216] The fluid bag 330 comprises the same dimensions as the container 73.

[0217] Hence, the fluid bag 330 comprises the chamber for waste fluid 72, the chamber for permeate 70, the chamber for bicarbonate 69, the powder bag 68 and another powder bag 66.

[0218] The container 73 is connected to a scale 74 on the side where no connections are going out of the container 73.

[0219] The connections leading from the comprised chambers and bags of the container 73 towards other circuits are connected to a fluid connection block 75. The fluid connection block 75 is outside the container 73 and on the side where the connections are going out of the container 73.

[0220] The fluid connection block 75 is on one end connected to a sixth valve 86 and a third filter 87.

[0221] The chamber for permeate 70 and the chamber for bicarbonate 69 are connected via a fluid connection 71 . The fluid connection 71 is inside the container 73.

[0222] The chamberfor permeate 70 is connected to the powder bags 66, 68. The connection is inside the container 73.

[0223] The powder bag 66 comprises acidic powder 66. The electrolyte solution 66 of the powder bag 66 flows over a seventh gas separator 57 into the acid path. In particular the fluid connects between the acidic solution 65 and the first recirculation circuit 43. In particular it connects between the first gas separator 51 and the third metering pump 48. DTS Ref.: 39672.ADT.P110PC

[0224] 26.11.2025

[0225] - 17 -

[0226] The powder bag 68 comprises alkaline powder 68. The electrolyte solution 66 of the powder bag 66 flows over a sixth gas separator 56 into the alkaline path. In particular the fluid connects between the base solution 67 and the second recirculation circuit 44, in particular it connects between the second gas separator 52 and the second metering pump 47.

[0227] The bicarbonate path leads from the chamber of bicarbonate 69 towards the alkaline and acidic path. The fluid connection from the chamber for bicarbonate 69 leads out of the container 73 through the fluid connection block 75 along a bicarbonate path 53 through a third gas separator 53 towards a control mechanism 59.

[0228] At the control mechanism 59 the bicarbonate path 53 splits up into two directions.

[0229] In one direction the bicarbonate path leads towards the alkaline path. In one direction the bicarbonate path leads over a fifth metering pump 50 and a tenth sensor 58 into the alkaline path. In particular the bicarbonate path 53 connects with the alkaline path between the second metering pump 47 and the switching mechanism 45, 46.

[0230] More specifically, the bicarbonate path connects with the alkaline path between the sixteenth sensor 83 and the thirteenth sensor 80.

[0231] In the other direction the bicarbonate path leads towards the acidic path. In the other direction the bicarbonate path 53 leads into the permeate path 54. In particular the connection of the bicarbonate path 53 and the permeate path 54 is between the fourth gas separator 54 and a fourth metering pump 49.

[0232] More specifically, the connection of the bicarbonate path and the permeate path 54 is between the fifteenth sensor 82 and the fourteenth sensor 81 .

[0233] The second bicarbonate path flows further from the connection point to the first bicarbonate path through a sixth pump 77, through the twelfth sensor 78 towards a connection point. This connection point is between the third reservoir 25 and the sixth sensor 17. Therefore, the second bicarbonate path leads into the second circuit.

[0234] The fluid connection from the chamber of permeate 70 leads out of the container 73 through the fluid connection block 75, along the permeate path 54, through a fifth gas separator 55, further through a fourth metering pump 49 and finally towards the acidic path. DTS Ref.: 39672.ADT.P110PC

[0235] 26.11.2025

[0236] - 18 -

[0237] Along the permeate path 54 between the fifth gas separator 55 and the fourth metering pump 49 the fluid flows through a third heater 62, through a pump 60 and through a fourth gas separator 54.

[0238] The permeate path 54 comprises a eleventh sensor 61 that measures in a circuit 63 which connects on one end between the third heater 62 and the fifth gas separator 55 and on the other end at the fourth gas separator 54.

[0239] The permeate path 54 is connected to the waste path through a heat exchanger 64. The connection is on one end along the waste path between the fluid connection block 75 and the waste pump 36 and on the other end along the permeate path between the fifth gas separator 55 and the third heater 62.

[0240] The chamber for waste fluid 72 is within a fluid container 73. The chamber for waste fluid 72 can be accessed by a fluid connection. This fluid connection is the waste path. In particular the waste path is split up and has further connections. One connection is a first waste path via the second fluid connection 76 and another connection is a second waste path via the first fluid connection 30.

[0241] The first waste path leads along the second fluid connection 76 starting from the second circuit - in particular between the dialysate inlet 19 of the dialyzer 10 and the second bypass valve 22A.

[0242] The first waste path - in particular the second fluid connection 76 - connects to the second waste path between the second detoxification unit 34 and the fluid waste bag 72 - in particular between the fluid connection block 75 and the heat exchanger 64 along the second waste path.

[0243] Finally at the connection point the first and second waste path flow together.

[0244] Between the fluid connection block 75 and the connection point there is a seventeenth sensor 84 comprised.

[0245] Further, the fluid flows through the fluid connection block 75 into the chamber for waste fluid 72.

[0246] The second waste path starts between the first heater 23 of the second circuit and the third reservoir 25 and leads towards a fluid waste bag 72. DTS Ref.: 39672.ADT.P110PC

[0247] 26.11.2025

[0248] - 19 -

[0249] The second waste path further passes through a single pass outlet valve 29 along the first fluid connection 30. The first fluid connection 30 splits up at a connection point from the main first fluid connection 30.

[0250] The main first fluid connection 30 flows directly into the fluid connection - along the waste path - between the second detoxification unit 34 and the waste pump 36, and further flows through the fluid connection block 75 into the fluid waste bag 72.

[0251] The split first fluid connection 30 is split at the connection point and flows into a point between the first filter 33 and the waste pump 35.

[0252] The fluid flows further from the fluid connection point between the first detoxification unit 33 and the waste pump 35, through a waste pump 35 and then further into the fluid connection between the waste pump 36 and the fluid connection block 75.

[0253] There, the split up first fluid connection 30 meets the main first fluid connection 30.

[0254] Then the fluid further flows through the fluid connection block 75 into the fluid waste bag 72.

[0255] In Fig. 4A a container 73 on two rollers 113 is shown.

[0256] The container 73 comprises a rectangular shape with rounded corners.

[0257] The container 73 comprises a film bag 73A, 330.

[0258] At one side of the film bag 73A, 330, the film bag 73A, 330 comprises an outer film A which is a first foil A, and at the other side the film bag 73A, 330 comprises an outer film C which is a third foil C.

[0259] Between the first foil A and the third foil C there is a second foil B.

[0260] The second foil B is set to be in parallel to the first foil A and the third foil C.

[0261] The second foil B is starting from the bottom of the foil bag 73A to the top of the foil bag 73A.

[0262] The second foil B divides the film bag 73A into two compartments 70, 72, wherein the first compartment 70 is along the first foil A and the second foil B and the second compartment 72 is along the third foil C and the second foil B. DTS Ref.: 39672.ADT.P110PC

[0263] 26.11.2025

[0264] - 20 -

[0265] The first compartment 70 comprises a first liquid 70.

[0266] In particular, the first compartment 70 comprises fresh water 70.

[0267] The first compartment 70 for fresh water 70 comprises a third fluid inlet / outlet 103.

[0268] Hence, the fluid flows from the first compartment 70 for fresh water 70 through the third fluid inlet / outlet 103 out of the container 73.

[0269] Furthermore, the first compartment 70 comprises a third compartment 69.

[0270] The third compartment 69 comprises bicarbonate 332.

[0271] The third compartment 69 comprises two fluid inlets / outlets, i.e. a fist

[0272] At one end the third compartment 69 for bicarbonate 332 comprises a second fluid inlet / outlet 102 that crosses the container 73.

[0273] Further, at this end there is a second fluid inlet / outlet 102 towards an osmosis water bag 102.

[0274] At another end of the third compartment 69 for bicarbonate 332 there is a fourth tube 71.

[0275] Due to the fourth tube, the first compartment 70 is connected to the third compartment 69.

[0276] The fluid flows from the first compartment 70 for fresh water 70 through the fourth tube 71 , and further through the third compartment 69 for bicarbonate 332 and further upstream through the second fluid inlet / outlet 102 into the osmosis water bag 102.

[0277] The second compartment 72 comprises a second liquid 72.

[0278] In particular, the second compartment 72 comprises waste water 72.

[0279] The second compartment 72 comprises a first fluid inlet / outlet 101.

[0280] Moreover, the fluid flows from a waste water bag 101 through the first fluid inlet / outlet 101 into the container 73, and further into the second compartment 72 for waste water 72.

[0281] Fig. 4B shows an intersection of the films A, B, C, D, in particular a top view or cross sectional view. DTS Ref.: 39672.ADT.P110PC

[0282] 26.11.2025

[0283] - 21 -

[0284] The cross sectional view comprises an outer film A which is a first foil A and at the opposite side an outer film C which is a third foil C.

[0285] The first foil A and the third foil C are connected in a way that they are building an elliptical shape.

[0286] Between the outer film first foil A and the outer film third foil C there is an inner film second foil B.

[0287] The second foil B builds the major axis of the ellipse.

[0288] The second foil B divides the ellipse into two sections, wherein first section is along the first foil A and the second foil B, and the second section is along the third foil C and the second foil B.

[0289] The second section comprises a first fluid inlet / outlet 101 that is directing a flow from the outside to the inside of the second section.

[0290] On the other hand, the first section comprises a third fluid inlet / outlet 103 that is directing a flow from the outside to the inside of the first section.

[0291] Additionally, the first section comprises a third section which is ell iptical ly shaped and limited by a film D.

[0292] The film D of the third section is connecting the outer film A and the inner film B.

[0293] The third section comprises a second fluid inlet / outlet 102 that is directing a flow from the outside to the inside of the third section.

[0294] Fig. 5A shows a container that comprises a bag.

[0295] The container is on two rollers and comprises a rectangular shape with rounded corners.

[0296] The comprised bag is divided into two segments, wherein the segments are of different sizes.

[0297] Moreover, the segment with smaller volume comprises a concave shape and the segment with the larger volume comprises a convex shape. DTS Ref.: 39672.ADT.P110PC

[0298] 26.11.2025

[0299] - 22 -

[0300] The segment with the smaller volume has a flow direction from the outside of the container to the inside of the smaller segment of the bag.

[0301] The segment with the larger volume has a flow direction from the inside of the larger segment of the bag to the outside of the container.

[0302] Fig. 5B shows a container 73 being on two rollers, wherein the container 73 comprises a rectangular shape with rounded corners.

[0303] The container 73 comprises a film bag 73A, 330.

[0304] At one side the film bag 73A, 330 comprises an outer film A which is a first foil A and at the other side the film bag 73A, 330 comprises an outer film C which is a third foil C.

[0305] Between the outer film A and the inner film C there is a inner film B.

[0306] The second foil B is set to be in parallel to the first foil A and the third foil C, wherein the second foil B is starting from the bottom of the foil bag 73A, 330 to the top of the foil bag 73A, 330.

[0307] The second foil B divides the film bag 73A into two compartments 70, 72.

[0308] Furthermore, the first compartment 70 is arranged along the first foil A and the second foil B.

[0309] Moreover, the second compartment 72 is arranged along the third foil C and the second foil B.

[0310] The first compartment 70 comprises a first liquid 70, in particular fresh water 70.

[0311] The first compartment 70 for fresh water 70 comprises a third fluid inlet / outlet 103.

[0312] The fluid flows from the first compartment 70 for fresh water 70 through the third fluid inlet / outlet 103 out of the container 73.

[0313] The second compartment 72 comprises a second liquid 72, in particular waste water 72.

[0314] The second compartment 72 comprises a first fluid inlet / outlet 101. DTS Ref.: 39672.ADT.P110PC

[0315] 26.11.2025

[0316] - 23 -

[0317] The fluid flows from a waste water bag 101 over the first fluid inlet / outlet 101 into the container 73 further into the second compartment 72 comprising waste water 72.

[0318] Fig. 5C shows a container that comprises a bag, wherein the container is on two rollers.

[0319] The container comprises a rectangular shape with rounded corners.

[0320] The comprised bag is divided into two segments. The segments are of different sizes.

[0321] Wherein the one segment with smaller volume is of a concave shape. The segment with the larger volume is of convex shape.

[0322] The segment with the smaller volume has a flow direction from the inside of the smaller segment of the bag to the outside of the container.

[0323] The segment with the larger volume has a flow direction from the outside of the container to the inside of the larger segment of the bag.

[0324] In Fig. 6 an embodiment of the film bag 330 is shown.

[0325] In particular, the embodiment of the film bag 330 shown in Fig. 6 reveals all features listed and explained in Fig. 2.

[0326] Furthermore, in Fig. 6 it is shown how to minimize the size of the film bag 330.

[0327] Therefore, the folding lines are illustrated as dashed lines.

[0328] The film bag 330 is divided in further compartments, due to two dashed lines perpendicular to the base line of the trapezoidal parts.

[0329] Hence, the rectangular part and the trapezoidal parts are each divided in three smaller compartments due to dashed lines perpendicular to the base line.

[0330] This sums up to nine compartments of the film bag 330, wherein in particular the rectangular part comprises three compartments and each trapezoidal part comprises three compartments.

[0331] Of all compartments, the upper rectangular compartment of the rectangular part comprises the largest volume. DTS Ref.: 39672.ADT.P110PC

[0332] 26.11.2025

[0333] - 24 -

[0334] Furthermore, the upper compartment of the rectangular part surrounds the tubes 325, 328, 329, 71.

[0335] The middle compartment and the bottom compartment of the rectangular part are of the same size and are of a rectangular shape.

[0336] Moreover, the middle compartment of each of the trapezoidal parts is rectangular.

[0337] The upper and bottom compartments of the trapezoidal parts comprise a trapezoidal shape.

[0338] In order to transform the shape of the film bag 330, the film bag 330 needs to be fold along the dashed lines.

[0339] Therefore, in a first step the one trapezoidal part on the outer side of the film bag 330 is folded down along the base towards the rectangular part of the film bag 330.

[0340] In a second step the second trapezoidal part is folded down along the base towards the rectangular part of the film bag 330.

[0341] After step 1 and step 2 the film bag 330 comprises solely a rectangular shape.

[0342] In a third step the folded and rectangularly shaped film bag 330 is folded again, in particular so that the bottom compartment of the rectangular part of the film bag 330 is folded upwards on top of the middle compartment of the rectangular part.

[0343] Finally, in a fourth step, the film bag 330 is folded once more upwards along the upper line of the middle compartment of the rectangular part of the film bag 330.

[0344] After step 4 the film bag 330 is decreased in size and is changed in geometrical shape.

[0345] Especially, the film bag 330 can be transformed from an octagonal shape to a rectangular shape.

[0346] Furthermore, the transformed shape of the film bag 330 comprises the shape of the upper rectangular part.

[0347] In this embodiment, the film bag 330 comprises an adhesive dot 344.

[0348] In particular, the adhesive dot 344 is aligned in the upper rectangular compartment. DTS Ref.: 39672.ADT.P110PC

[0349] 26.11.2025

[0350] - 25 -

[0351] More precisely, the adhesive dot 344 is aligned between the second fluid inlet / outlet 102 and the third fluid inlet / outlet 103 at an approximate height level corresponding to the one end of the third fluid inlet / outlet inside the film bag 330.

[0352] Even more precisely and in accordance to Fig. 2, the adhesive dot 344 is aligned at the third compartment 69, above the second foam filter 326.

[0353] Fig. 7A shows another embodiment of the film bag 330 shown in Fig. 6.

[0354] All features that are described above shall apply for embodiment of Fig. 7A.

[0355] Fig. 7A shows a cross sectional view of the film bag 330, wherein the figure shows the outer film A, in particular the first foil A.

[0356] The first and second areas of the fluid film bags a, b are shown within the film bag 330 as a rectangular shapes with rounded corners.

[0357] Furthermore, the first area of the fluid film bag a is fully aligned within the upper rectangular compartment.

[0358] Moreover, the second area of the fluid film bag b is fully aligned within the middle and bottom rectangular compartments.

[0359] Hence, the second area of the fluid film bag b is larger compared to the first area for the fluid film bag a.

[0360] Fig. 7B shows another embodiment of the film bag 330 shown in Fig. 6.

[0361] All features that are described above shall apply for embodiment of Fig. 7B.

[0362] Fig. 7B shows a cross sectional view of the film bag 330, wherein the figure shows the outer film C, in particular the third foil C.

[0363] The third and fourth areas of the fluid film bags c, d are shown within the film bag 330 as a rectangular shape with rounded corners.

[0364] Moreover, the fourth area of the fluid film bag d is fully aligned within the upper rectangular compartment, and is partially aligned within the middle compartment of the rectangular part. DTS Ref.: 39672.ADT.P110PC

[0365] 26.11.2025

[0366] - 26 -

[0367] Furthermore, the third area of the fluid film bag c is fully aligned within the bottom rectangular compartment and partially aligned within the middle rectangular compartment of the rectangular part.

[0368] Therefore, the fourth area of the fluid film bag d is larger compared to the third area for the fluid film bag c.

[0369] Fig. 8A shows a container 73 in a frontal view.

[0370] The container 73 comprises a rectangular shape.

[0371] In particular, the container 73 comprises a housing.

[0372] The housing of the container 73 is designed to be open at the top of the container 73.

[0373] Moreover, the housing surrounds the container 73 along the side part and the bottom of the container 73.

[0374] Additionally, Fig. 8A shows that around the top corners of the container 73 a housing is comprised. Still, the housing comprises an opening at the top of the container 73.

[0375] Arranged on top of the housing at the top of the container 73 there is a handle.

[0376] This handle is u-shaped.

[0377] Furthermore, the handle comprises a connection handle between the parts of the handle that are in parallel to each other.

[0378] Hence, the upper part of the handle is in parallel to the connection handle.

[0379] The container 73 comprises a height of the container 351 and a first width of the container 352.

[0380] The container 73 comprises a first width of the container 352, wherein the first width of the container 352 takes additionally the width of the housing of the container 73 into account.

[0381] Further, the container 73 is defined by the height of the container 351 .

[0382] Moreover, the height of the container 351 is not counting in the additional height of the housing. DTS Ref.: 39672.ADT.P110PC

[0383] 26.11.2025

[0384] - 27 -

[0385] Additionally, the height of the container 351 is larger than the first width of the container 352.

[0386] The container 73, in particular the bottom of the housing of the container 73, is connected to two pairs of rollers 113.

[0387] Each pair of rollers 113 comprises two rollers 113.

[0388] Fig. 8B shows a container 73 in a side view.

[0389] The container 73 comprises a rectangular shape, in particular a quadratic shape.

[0390] The container 73 comprises a second width of the container 353 and a height of the container 351.

[0391] In this embodiment the height of the container 351 is equal to the second width of the container 353.

[0392] Furthermore, the container 73 is on three rollers 113.

[0393] In this embodiment one roller 113 is connected to the one end of the bottom part of the container 73, one roller 113 is connected to the other end of the bottom part of the container 73, and one roller 113 is connected to the middle of the bottom part of the container 73.

[0394] Additionally, the container 73 comprises a bag which is limited by areas of the fluid film bag a, b, c, d.

[0395] The second area of the fluid film bag b is located at the bottom of the container 73.

[0396] In contrast, the fourth area of the fluid film bag d is in parallel to the second area of the fluid film bag b and is located at the top of the container 73.

[0397] Further, the third area of the fluid film bag c is connecting the second area of the fluid film bag b and the fourth area of the fluid film bag d on one end.

[0398] In parallel to the third area of the fluid film bag c is the first area of the fluid film bag a.

[0399] The first area of the fluid film bag a is connecting the second area of the fluid film bag b and the fourth area of the fluid film bag d on the other end.

[0400] On top of the container 73 there is a receptacle 111. DTS Ref.: 39672.ADT.P110PC

[0401] 26.11.2025

[0402] - 28 -

[0403] The receptacle 111 comprises a rectangular shape.

[0404] Further, the width of the receptacle 111 is smaller compared to the second width of the container 353.

[0405] Moreover, one side wall of the receptacle 111 is fully aligned to the side wall of the container 73, in particular along the side which is closer to the first area of the fluid film bag a.

[0406] Furthermore, the other side wall of the container 73 is not fully aligned with the side wall of the receptacle 111 , as the lengths are differing.

[0407] Hence, the top part of the container 73 comprises a part where the receptacle 111 is allocated and a part where no receptacle 111 is comprised.

[0408] The one side where the top part of the container 73 does not comprise a receptacle 111 on top is the side where the third area of the fluid film bag c is aligned.

[0409] The part of the top of the container 73 where no receptacle 111 is comprised forms a corner.

[0410] This corner is located at the point where the third area of the fluid film bag c and the fourth area of the fluid film bag d cross.

[0411] The receptacle 111 comprises seven holes.

[0412] Along the top of the receptacle 111 starting from the corner there are four holes distributed along the length of the receptacle 111.

[0413] One hole is located at the center of the container 354.

[0414] Next to this hole at the center two further holes are located towards the side of the third area of the fluid film bag c and one hole is located next to the hole in the center in direction towards the first area of the fluid film bag a.

[0415] At the one end of the receptacle 111 that is fully aligned with the side wall of the container 73 the receptacle 111 comprises three holes in smaller distance to each other than the other four holes that are distributed along the receptacle 111.

[0416] On top of the three holes inside the receptacle 111 and, in particular on top of the receptacle 111 , there is a handle 112.

[0417] This handle 112 is aligned at one side of the container 355. DTS Ref.: 39672.ADT.P110PC

[0418] 26.11.2025

[0419] - 29 - ln particular, the one side of the container 355 is where the first area of the fluid film bag a and the fourth area of the fluid film bag d connect.

[0420] The handle 112 is connected to the container 73 in a certain angle.

[0421] The angle is variable as the handle 112 is moveable.

[0422] In Fig. 9A a 3D view of the container 73 is shown.

[0423] The container 73 comprises a handle 112 in a position where the angle between the side wall of the container 73 and the handle 112 is zero.

[0424] Hence, the handle 112 is folded down and is not generating extra space next to the container 73.

[0425] The end of the handle 112 that is connected with the container 73 is located a holding point 357.

[0426] The holding point 357 is a surface part on top of the container 73 along the side where the handle 112 is aligned.

[0427] The holding point 357 comprises a shape with certain cut-outs.

[0428] In Fig. 9A the film bag 330 is illustrated as a 3D bag with three tubes sticking out of the top of the film bag 330.

[0429] Additionally, the film bag 330 shows two eyelets on top of the film bag 330, wherein the two eyelets are located at the left and right end of the top of the film bag 330.

[0430] Further, the film bag 330 is movable towards the holding point 357.

[0431] In Fig. 9B the holding point 357 of the container 73 shown in Fig. 9A is shown.

[0432] The holding point 357 comprises five cut-outs, wherein the three cut-out in the middle of the holding point 357 fit for the three tubes of the film bag 330.

[0433] The two outer cut-outs of the holding point 357 are used to fix the film bag 330 to the holding point 357. DTS Ref.: 39672.ADT.P110PC

[0434] 26.11.2025

[0435] - 30 - ln particular the two eyelets of the film bag 330 located at the left and right end of the top of the film bag 330 fit into the outer cut-outs of the holding point 357 in order to fix the film bag 330.

[0436] Furthermore, Fig. 9B shows the different shapes of the fluid inlets / outlets 101 , 102, 103.

[0437] The hoses of the fluid inlets / outlets 101 , 102, 103 are aligned into the holdingpoint 357.

[0438] Moreover, the fluid inlets / outlets 101 , 102, 103 provide adapter at the end of the fluid inlets / outlets 101 , 102, 103.

[0439] Further, the first fluid inlet / outlet 101 provides the largest adapter, and the second fluid inlet / outlet 102 provides the smallest adapter.

[0440] The adapter of the third fluid inlet 103 is illustrated with a further connection hose.

[0441] Fig. 10A shows a 3D illustration of the container 73 shown in Fig. 9A connected with an osmosis 200.

[0442] The container 73 comprises the fixed film bag 330, as shown in Fig. 9B.

[0443] The film bag 330 provides three tubes and their fluid inlet / outlets 101 , 102, 103 as shown in Fig. 9B.

[0444] As shown in Fig. 9B, the third fluid inlet / outlet 103 is connected to a further hose.

[0445] Further, as illustrated in Fig. 10A the further hose is a fourth tube 331 .

[0446] Additionally, the fourth tube 331 is connected to the fluid inlet / outlet 103.

[0447] Furthermore, the fourth tube 331 is connected to an osmosis 200.

[0448] In Fig. 10B shows the holding point of the container 73 as shown in Fig. 9B.

[0449] It is further shown how the fourth tube 331 and the third fluid inlet / outlet 103 of the fluid film bag 330 are connected.

[0450] Hence, is possible to disconnect the fourth tube 331 and the third fluid inlet / outlet 103 by moving the fourth tube 331 up and by moving the third fluid inlet / outlet 103 down.

[0451] Additionally to Fig. 9B, Fig. 10B shows the handle of the container 73 fixed on top of the holding point. DTS Ref.: 39672.ADT.P110PC

[0452] 26.11.2025

[0453] - 31 -

[0454] Such a mobile container with reservoirs, preferably bags for liquids, is described in WO2017158392A1 , where the osmosis water is stored in an osmosis water bag 102 and the waste water in another separate waste water bag 101 in a container - this container makes it possible to handle bags with larger volumes of liquid > 80 liters; the advantage here is that, compared to other continuous dialysis machines, significantly fewer changes of bags are required, as the volumes are many times larger than the usual bags (see also Fig. 1).

[0455] This solution makes it possible to store and use further solutions in additional bags or containers 94, 93, 95.

[0456] However, a fundamental problem here is that at the start of the treatment, the osmosis water bag 102 is completely filled to produce dialysate and the waste water bag 101 is completely empty to collect the used dialysate and transport it for disposal. During the course of the treatment, all fresh fluids are removed from the containers I bags by the dialysis machine and pumped back into the waste water bag 101 as used dialysate - waste.

[0457] A liquid always tries to form a plane level, but due to the rigidity of the bags and in particular the friction I movements between the bag and the container wall, different forces are generated. -> This means that the bags always move very differently in relation to each other - connections I discharge points I tubes I welding seams can be damaged, crack, etc. A stable process for consistently smooth filling I emptying is therefore not possible. Furthermore, handling a large number of different bags is very time-consuming and error-prone.

[0458] Another important point in dialysis is the patient-individual regulation of specific electrolytes or other parameters. This includes in particular bicarbonate. In order to be able to regulate these different electrolytes as individually as possible, they must be stored in separate and individual containers and fed individually to the dialysis machine. Bicarbonate is preferably used as a dry powder, as it has a significantly better shelf life, is not as temperature-sensitive as fully saturated solutions and the additional weight of liquid for transportation is avoided. DTS Ref.: 39672.ADT.P110PC

[0459] 26.11.2025

[0460] - 32 - ln order to avoid the previously described problems of the film bag with each other and with the container, a single film bag 330, 73A was invented for this application (cf. Fig.

[0461] 2 and Fig. 4a-b and Fig. 5a-c).

[0462] The movement of the films or bags against each other and the movement of the films or bags against the wall of the container 73, in particular the mobile container, is prevented by using only a single film bag 330 which, when filled, completely fills the walls of the container with its outer films A, C. The at least two or more liquids 70, 72 are separated from each other by an additional inner film B in the middle of the one film bag 330.

[0463] In other words, three identically sized films A, B, C are placed on top of each other and welded to form a sandwich of three films 330. This results in two outer films A, C and at least one inner film B. These two outer films A, C are in contact with the container 73 holding the film bag 330 in particular, whereas the inner film B is only located between the two outer films A, C and is therefore only in fluid 70, 72 contact.

[0464] A fluid access, i.e. a third fluid inlet / outlet 103 for filling with fresh water 70 and removing the osmosis water for dialysis is preferably located between the 1stA and 2ndB foil. This is preferably a second tube 328 for osmosis water. Whereas between the 2ndB and 3rdC foil there is preferably a fluid access, i.e. a fluid inlet / outlet 101 for filling with waste water 72 or filtrate during treatment. This is preferably a third tube 329 for the dialysate used.

[0465] This results in a single film bag 330 with at least two separate chambers 70, 72, each of which has at least one separate fluid inlet or outlet 101 , 103 for a liquid. Whereas the fluid inlet or outlet 101 , 103 could be single separated tubes or one single connection line containing separate fluid channels.

[0466] Foils A and C completely line the inside of the container 73 in any filled state. Whereas foil B “floats freely” between the two foils A and C and is completely inside the first and second liquid 70, 72. If more additional liquid is now removed from or added to one of the two compartments 70, 72, the second foil B moves from the side of the first foil A to the side of the third foil C, for example, depending on the fill level of the two compartments 70, 72. If the total fill volume of the two compartments 70, 72, i.e. the DTS Ref.: 39672.ADT.P110PC

[0467] 26.11.2025

[0468] - 33 - chamber between the first foil A and the second foil B and the chamber between the second foil B and the third foil C, remains almost constant, i.e. the sum of the two volumes 70, 72, only the second foil B moves within the liquids 70, 72, but none of the three foils A, B, C moves in direct contact with the container 73.

[0469] In the specific application for dialysis, the chamber between the first foil A and the second foil B is preferably filled with a first liquid 70 at the beginning of using the foil bag 330, whereas the second compartment 72 between the second foil B and the third foil C is completely empty.

[0470] In the course of the treatment, the fluid is continuously removed from the first compartment 70 between the first and second film A, B and fed to the dialysis machine 100, brought into contact with the blood and or a biological solution via a membrane 10 and continuously fed to the chamber 72 between the second and third film B, C as toxin-loaded dialysate. In simple terms, the fluid is continuously removed from the first compartment 70 between the first and second film A and B and then returned to the second compartment 72 between the second and third film B and C.

[0471] The solution claimed here is not limited to a fluid bag consisting of at least 3 films. The number of films can be increased without restriction, which means that a large number of such chambers can be created for different fluids.

[0472] The solution claimed here is therefore not only limited to dialysis but offers an advantage for all applications in which at least two liquids are contained in one container and are preferably stored in foil bags. This mainly includes bag-in-box systems.

[0473] The fluid connections, preferably tubes 329, 325, 328, for filling and emptying the respective compartments 69, 70, 72 are preferably attached to the compartments, more preferably at the top in the weld seams 340 of the films A, B, C. Preferably, these tubes protrude 329, 325 328 slightly into the respective compartments 69, 70, 72 of the film chambers of the bags and thus enable force and pressure-free filling and emptying of the respective compartments between the respective films in any state.

[0474] The tubes 329, 71 , 328 are preferably slightly perforated at the lower end within the compartments 70,72 in order to draw in or fill in liquid evenly from all sides and to DTS Ref.: 39672.ADT.P110PC

[0475] 26.11.2025

[0476] - 34 - prevent the film A, B, C, D from being sucked in or the tubes 329, 71 , 328 from becoming blocked by sucked-in film A, B, C, D.

[0477] The films used here can be rectangles, circles, polygons or any other geometry. For the use of a rectangular box, preferably a rectangular container, an octagonal film is preferably used. When using pure pillow bags, i.e. square or rectangular films, excessive material accumulates at the respective corners. In other words, the individual films, which form the outside of the compartments and are in direct contact with the container, cannot fill the corners of the container evenly. The different films therefore overlap in the corners of the container. This happens especially when filling and emptying the container and it is not possible to ensure which chamber of the films is on top of the other. As a result, one or more films located between the films that are in direct contact with the outside of the container can no longer move freely between these films in the liquids when the filling volumes of the respective compartments change. This would lead to unwanted tension in the films, which in turn leads to stress on the weld seams and can therefore lead to cracks or leaks.

[0478] However, if an octagonal film bag is used with a rectangular container, it can unfold freely when filled and the outer films of the film bag completely line the said container, whereas the inner films are not under tension and can move freely between the outer films within the liquids.

[0479] Further folding of a film bag is possible in order to achieve the desired cubic shape of a rectangular container. However, this leads to challenges in the production of the film bags, as such a film bag has a widely varying number of film layers at the respective weld seams. This requires a widely varying welding profile and may lead to inadequate welding seams.

[0480] The bicarbonate used for dialysis is preferably not and / or only partially provided in one of the dialysis concentrates 65, 67, 66, 68 (cf. Fig. 4a, Fig. 4b). Preferably, all or parts of the bicarbonate required for dialysis are provided as a powder in one of the chambers, i.e. the chamber for bicarbonate 69 of the foil bag 73A, 330. By providing the bicarbonate 332 as a powder in a third compartment 69 of the fluid bag, this can be significantly more concentrated than in one of the dialysis concentrates 65, 67 and can be better controlled separately. DTS Ref.: 39672.ADT.P110PC

[0481] 26.11.2025

[0482] - 35 -

[0483] The bicarbonate 332 is preferably introduced into the container 73 as a powder 332 within a film bag 330 in a separate third compartment 69 of this film bag 73A.

[0484] In this way, the bicarbonate 332 is reliably included in the gravimetric balancing of the dialysis machine 100 by being measured with the scale 74. In order to minimize the tubing connections 71 , 79, 101 , 102, 103, 325, 328, 329 in particular the fluid connection 79 from the permeate 70 to the bicarbonate 69 compartment and components, and to make the usability as simple as possible, the bicarbonate compartment 69 is preferably placed directly within the fluid bag compartment for permeate 70.

[0485] The separate bag 69 for the bicarbonate 332 has an inlet, i.e. a fourth tube 71 , for osmosis water 70 at the bottom. A backflow of the bicarbonate or the saturated solution with bicarbonate 332 into the compartment with osmosis water 70 is preferably prevented by a non-return valve and a fine foam filter 323. The fluid outlet or tube end of the fourth tube 71 that supplies the osmosis water 70 into the bicarbonate bag 69 is preferably at the opposite side of the inlet of the first tube 325 that is used for sucking out the bicarbonate or the saturated solution with bicarbonate 332 from the bicarbonate bag 69 through the connection, i.e. the second fluid inlet / outlet 102 into the dialysis device 100.

[0486] This opposite positioning of the two tubes 323, 326 is preferably selected to ensure that the supplied permeate 70 flows completely through the bicarbonate powder 332 present in the bag, i.e. the chamberfor bicarbonate 69 in order to partially or completely dissolve it and thus produce a solution of bicarbonate liquid that is as saturated as possible, which is then supplied to the dialysis machine via the connection, i.e. the second fluid inlet / outlet 102. The first tube 325 through which the saturated electrolyte solution is sucked out of the third compartment 69 preferably has a fine second foam filter 326 at the lower inlet within the third compartment 69. This fine foam filter is intended to ensure that only completely dissolved electrolytes are sucked out into the dialysis machine via the first tube 325 and the connection i.e. the second fluid inlet / outlet 102 and that no electrolytes that are not yet completely in solution are removed from the third compartment 69. The second foam filter 326 used here preferably has a pore size between 0.1 pm and 280 pm. Furthermore, the second foam DTS Ref.: 39672.ADT.P110PC

[0487] 26.11.2025

[0488] - 36 - filter 326 used here on the withdrawal first tube 325 optionally also includes a nonreturn valve to prevent liquid from unintentionally flowing back into the chamber for bicarbonate 69 through the connection, i.e. the second fluid inlet / outlet 102. The size and volume of the third compartment 69 is preferably selected such that sufficient bicarbonate 332 can be stored therein for a therapy. In this case, sufficient means that a continuous solution of the bicarbonate with the permeate can produce a solution which has a concentration between 0 - 90 mmol / l bicarbonate. In otherwords, the third compartment 69 should be able to take up 35 - 860 g bicarbonate 332 if the first compartment 70 contains 60 - 120 liters of osmosis water. Preferably the third compartment 69 is not significantly bigger than the volume of the placed bicarbonate powder 332.

[0489] In addition, the fluid bag 330 preferably has at least one or two eyelets 318, 322 in order to place it securely in the container 73. These hangers 318, 322 are preferably located in the upper area of the bag or in the area of the upper weld seam which also contains the fluid inlets and outlets 101 , 102, 103. The film bag 330 is preferably fixed in the upper area so that the bag can be filled and emptied from above. This means that none of the film layers A, B, C, D overlap with each other.

[0490] The usability for the user is also significantly improved if the film bag 330 can be inserted and fixed in the upper area and it is not necessary to work in the lower area of the container 73, e.g. above the rollers 113. A container 73 intended for use with this foil bag 330 preferably has holding points 357 for attaching the foil bag 330. These holding points 357 are preferably designed in such a way that they each fit exactly to the respective shapes of the foil bag 330, in particular the eyelets 318, 322 and the tubes 329, 325, 328 or the connections 101 , 102, 103. Whereby the eyelets 318, 322 preferably have different diameters and thus the film bag 330 can only be inserted in one direction.

[0491] This holding point 357 for the foil bag 330 in the container 73 is preferably attached to the short side of the container, i.e. the first width of the container 352 and can be freely positioned along the receptacles 111. This holder 357 can therefore be positioned in the center 354 of the container 73 or on the side 355. Whereby the holder is preferably positioned on the side 355, as it is thus in contact with the side wall, i.e. the first width of the container 352 and is more accessible for the user. DTS Ref.: 39672.ADT.P110PC

[0492] 26.11.2025

[0493] - 37 -

[0494] The dimensions or geometry of such a fluid film bag 330 is determined by its side lengths 310, 312, 314, 316 and the respective angles 311 , 313, 315, 317. If such a fluid film bag 330 is positioned centrally 354 in a container 73, the bag 330 spreads out symmetrically with its films A, C. The top or bottom side 310 length of the fluid film bag 330 is then preferably as long as the side of the container 73, i.e. the first width of the container 352, or preferably the top or bottom side 310 length of the fluid film bag 330 is slightly smaller than the first width of the container 352 in order to unfold well in the container 73. The height 314 of the fluid film bag 330 is then preferably as long as the height 351 of the container, or preferably height of the fluid film bag 314 is slightly smaller than the height of the container 351 so as not to protrude beyond the container 73. The length of the leg 341 is preferably half as long as the second width of the container 353 and the legs 312, 316 and theirangles 311 , 313, 315, 317 are preferably symmetrical.

[0495] However, if the fluid film bag 330 is attached to the attachment, i.e. the holding point 357 on the preferred outer side 355, the fluid film bag 330 does not unfold symmetrically around the center in both directions, but must unfold offset in the container 73. For this reason, an octagonal film is preferable, but not a symmetrical octagon. If the fluid film bag 330 is viewed from the side of the first film A, it can be divided into the two areas, a first area of the fluid film bag a and a second area of the fluid film bag b. Whereby a then lies in the container 73 on the side of the container under the holder 355. The first area of the fluid film bag 330 a must therefore have approximately the length of the height of the container 351 and width of the first width of the container 352. Whereby the second area of the fluid film bag b then lies in the container 73 against the base of the container, i.e. the second width of the container 353. The second area of the fluid film bag 330 b must therefore have approximately the length of the second width of the container 353 and width of the first width of the container 352. If the fluid film bag 330 is viewed from the side of the third film C, it can be divided into the two areas c and d. If the legs 316, 312 and the angles 311 , 317 were now symmetrical, there would be tension on the film and material accumulation in a third and a fourth area of the fluid film bags c, d. To prevent the film from being under tension in the rear bag area c, the second side length of the film bag, i.e. second leg 316 can be increased and the first angle of the film bag 311 can be made more DTS Ref.: 39672.ADT.P110PC

[0496] 26.11.2025

[0497] - 38 - obtuse. This means that more material is available in the rear bag area when unfolding and reduces the tension of the film at this point.

[0498] The folding described in Fig. 6 is preferably carried out in steps 1-4. As a result, a very compact foil bag 330 is folded, which can be very easily inserted into the container 73 by the user. After complete folding, the second area of the fluid film bag b is preferably attached to the center of the fourth area of the fluid film bag d with a small adhesive dot 344. This allows the folded bag to be transported compactly. When the film bag 330 is filled, this adhesive dot (344) is preferably released in such a way that the film bag (330) opens up and the first and second area of the fluid film bag a and b lie against the height of the container 351 and the second width of the container 353 like a L in the container (73).

[0499] In order to initially fill the fluid bag 330 with fluid, it is preferably brought into the proximity of an osmosis 200 by means of the container 73. This osmosis 200 preferably also contains a reservoir in order to fill the fluid bag 330 connoted there with the required water as quickly as possible. In order to bring said container 73 and the fluid film bag 330 into a fluidic connection with the osmosis 200 as easily as possible in all positions, a disposable connecting fourth tube 331 is preferably additionally attached to the connection point, i.e. the third fluid inlet / outlet 103 for the permeate 70. This connecting fourth tube 331 can be removed again after the filling of a first liquid, i.e. fresh water 70 in order to subsequently bring the fluid bag (330) into fluidic connection with the dialysis machine (100). For this purpose, the container 73 can be easily moved by means of the flexible handle 112 and the rollers 113 (cf. Fig. 8a-8b and Fig. 9a-9b and Fig. 10a-10b).

[0500] DTS Ref.: 39672.ADT.P110PC

[0501] 26.11.2025

[0502] - 39 -

[0503] Reference Numerals

[0504] 1 patient

[0505] 2 first blood line

[0506] 3 first blood line infusion connection

[0507] 4 first reservoir; citric solution; first infusion solution fluid bag

[0508] 5 first sensor

[0509] 6 first infusion pump

[0510] 7 second sensor

[0511] 8 blood pump

[0512] 9 third sensor

[0513] 10 dialyzer

[0514] 11 fourth sensor

[0515] 12 second blood line infusion connection

[0516] 13 second reservoir; calcium solution, second infusion solution fluid bag

[0517] 14 fifth sensor

[0518] 15 second infusion pump

[0519] 16 second blood line

[0520] 17 sixth sensor; value

[0521] 18 first dialysate pump

[0522] 19 dialysate inlet

[0523] 20 dialysate outlet

[0524] 21 second dialysate pump

[0525] 22 first bypass valve

[0526] 22A second bypass valve DTS Ref.: 39672.ADT.P110PC

[0527] 26.11.2025

[0528] - 40 -

[0529] 22B third bypass valve

[0530] 23 first heater

[0531] 24 seventh sensor

[0532] 25 third reservoir

[0533] 26 fourth reservoir

[0534] 27 first metering pump

[0535] 29 single pass outlet valve

[0536] 30 first fluid connection

[0537] 31 fourth valve

[0538] 32 fifth valve

[0539] 33 first filter, first detoxification unit

[0540] 34 second filter, second detoxification unit

[0541] 35 first waste pump

[0542] 36 second waste pump

[0543] 37 valve circuit; mixing point

[0544] 38 second heater

[0545] 39 first regeneration pump

[0546] 40 second regeneration pump

[0547] 41 eighth sensor

[0548] 42 ninth sensor

[0549] 43 first regeneration circuit

[0550] 44 second regeneration circuit

[0551] 45 first switching valve

[0552] 46 second switching valve

[0553] 47 second metering pump DTS Ref.: 39672.ADT.P110PC

[0554] 26.11.2025

[0555] - 41 -

[0556] 48 third metering pump

[0557] 49 fourth metering pump

[0558] 50 fifth metering pump

[0559] 51 first gas separator

[0560] 52 second gas separator

[0561] 53 third gas separator; bicarbonate path

[0562] 54 fourth gas separator; permeate path

[0563] 55 fifth gas separator

[0564] 56 sixth gas separator

[0565] 57 seventh gas separator

[0566] 58 tenth sensor; value

[0567] 59 control mechanism; mixing mechanism

[0568] 61 eleventh sensor

[0569] 62 third heater

[0570] 63 circuit

[0571] 64 heat exchanger

[0572] 65 fifth reservoir

[0573] 66 acid powder; first powder bag; sixth reservoir

[0574] 67 seventh reservoir

[0575] 68 alkaline powder; second powder bag; eighth reservoir

[0576] 69 chamber for bicarbonate; third compartment; powder bag; ninth reservoir

[0577] 70 chamber for permeate; permeate bag; tenth reservoir; first compartment; first liquid; fresh water;

[0578] 71 fluid connection; fourth tube

[0579] 72 second fluid compartment; chamber for waste fluid; second liquid; waste water DTS Ref.: 39672.ADT.P110PC

[0580] 26.11.2025

[0581] - 42 -

[0582] 73 container; balancing device

[0583] 73A receiving space; fluid bag; film bag; foil bag

[0584] 74 scale; weighing means, load cell

[0585] 75 fluid connection block

[0586] 76 second fluid connection

[0587] 77 sixth pump

[0588] 78 twelfth sensor

[0589] 79 connection point

[0590] 80 thirteenth sensor

[0591] 81 fourteenth sensor

[0592] 82 fifteenth sensor

[0593] 83 sixteenth sensor

[0594] 84 seventeenth sensor

[0595] 86 sixth valve

[0596] 87 third filter

[0597] 93 third bag

[0598] 94 fourth bag

[0599] 95 fifth bag

[0600] 100 dialysis machine

[0601] 101 waste water bag; first fluid inlet / outlet; first bag

[0602] 102 osmosis water bag; second fluid inlet / outlet; second bag

[0603] 103 third fluid inlet / outlet

[0604] 111 receptacle

[0605] 112 handle

[0606] 113 roller DTS Ref.: 39672.ADT.P110PC

[0607] 26.11.2025

[0608] - 43 -

[0609] 200 osmosis

[0610] 310 bottom / top side length of the film bag

[0611] 311 first angle of the film bag

[0612] 312 first side length of the film bag; first leg

[0613] 313 second angle of the film bag

[0614] 314 third side length of the film bag; height of the film bag

[0615] 315 third angle of the film bag

[0616] 316 second side length of the film bag; second leg

[0617] 317 fourth angle of the film bag

[0618] 318 first eyelet; first hanger

[0619] 322 second eyelet; second hanger

[0620] 323 tube; first foam filter

[0621] 325 first tube

[0622] 326 tube; second foam filter

[0623] 328 second tube

[0624] 329 third tube

[0625] 330 film bag; foil bag

[0626] 331 fourth tube

[0627] 332 bicarbonate

[0628] 340 weld seam

[0629] 341 length of the leg

[0630] 344 adhesive dot

[0631] 351 height of the container

[0632] 352 first width of the container

[0633] 353 second width of the container DTS Ref.: 39672.ADT.P110PC

[0634] 26.11.2025

[0635] - 44 -

[0636] 354 center of the container

[0637] 355 side of the container

[0638] 357 holding point

[0639] A first outer film; first foil

[0640] B inner film; second foil

[0641] C second outer film, third foil

[0642] D film a first area of the fluid film bag b second area of the fluid film bag c third area of the fluid film bag d fourth area of the fluid film bag

Claims

DTS Ref.: 39672.ADT.P110PC26.11.2025- 45 -Claims1 . Fluid bag (73A), especially fluid bag (73A) for fluid treatment, especially dialysis treatment of patient (1), with an additional film (A, B, C, D) within the bag (73A), the additional film (A, B, C, D) being a separating wall within the bag (73A) and thereby forming at least a first compartment and as second compartment.

2. Fluid bag (73A) according to claim 1 , characterized in that the fluid bag (73A) is made of films (A, B, C, D).

3. Fluid bad (73A) according to claim 2, characterized in that the fluid bag (73A) is made of at least three films (A, B, C, D) connected with each other, especially wherein the three films (A, B, C) form the side walls (A, C) and the inner separating wall (B) of the bag (73A).

4. Fluid bag (73A) according to claim 3, characterized in that the films (A, B, C, D) are connected via a material-connection, especially are welded and / or glued to each other.

5. Fluid bag (73A) according to one of claims 2 to 4, characterized in that the films (A, B, C, D) are connected at and / or adjacent their outer borderlines with each other.

6. Fluid bag (73A) according to one of the preceding claims, characterized in that the fluid bag size (a, b, c, d) is dimensioned such that its outer walls (A, C) will fit into a container (73) with rigid walls, wherein the container (73) is designed to hold the fluid bag (73A).DTS Ref.: 39672.ADT.P110PC26.11.2025- 46 -7. Fluid bag (73A) according to one of the preceding claims, characterized in that the films (A, B, C, D) are transparent or at least partially transparent.

8. System comprising at least one fluid bag (73A) and at least one container (73), wherein the container (73) is designed to hold the fluid bag (73A).

Images