The present disclosure relates to a water purification apparatus that comprises a reverse osmosis device, RO-device, producing a purified water flow and to a corresponding method. The proposed method comprises detecting at least one fluid property of purified water in the purified water path and regulating a flow rate of water in the recirculation path to fulfill one or more predetermined criteria of the purified water in the purified water path, based on the at least one detected fluid property. The present disclosure also relates to a computer program and a computer program product implementing the method.

Dialysis monitors capable of storing and using thermal energy and methods related thereto are disclosed. Dialysis monitors capable of storing and using disinfection and/or cleaning fluids which was used at an earlier disinfection and/or cleaning event and methods related thereto are also disclosed. Thermally stored energy may, for example, be used for quick thermal disinfection of the fluid path, quick start-up of the preparation of treatment fluid, and as back-up power for continuous preparation of treatment fluid should externally provided power be interrupted.

A renal therapy apparatus includes a blood filter, a blood pump, a treatment fluid pump, and a control unit configured to control at least one of the blood pump or the treatment fluid pump during a filter cleaning sequence. The blood filter includes a plurality of hollow fiber membranes. During the filter cleaning sequence, a fluid mixture is formed by mixing air with a blood-compatible and physiologically safe fluid. Also during the filter cleaning sequence, the fluid mixture is transferred across insides and/or outsides of the plurality of hollow fiber membranes at least one time. The use of the fluid mixture enables the filter cleaning sequence to be performed during the blood treatment.

A method of sanitizing liquid for use in a medical device, the method comprising the steps of providing a medical device defining a water circuit with a volume of liquid, sensing the temperature of the volume of liquid with a sensor, heating the volume of liquid from an initial temperature to exceed a threshold temperature, maintaining the volume of liquid above the threshold temperature, determining a time-temperature value for the volume of liquid periodically once the threshold temperature has been exceeded, calculating a cumulative time-temperature value and providing an output signal once the cumulative time-temperature value has reached a level indicative of a sanitizing dose. A medical device and a liquid sanitizer are also disclosed.

A renal failure therapy system includes a dialysis fluid circuit including a dialysis fluid pump; a source of physiological cleaning, disinfecting, and/or decalcifying substance in fluid communication with the dialysis fluid circuit; a source of purified water in fluid communication with the dialysis fluid circuit; and a logic implementer in operable communication with the dialysis fluid pump, the logic implementer causing the physiological cleaning, disinfecting, and/or decalcifying substance from its source to be added to purified water from the purified water source to form a mixture and to circulate the mixture within the dialysis fluid circuit using the dialysis fluid pump to at least one of clean, disinfect or decalcify at least a portion of the dialysis fluid circuit without a subsequent rinse.

A control system is configured to implement a method of preparing a blood treatment apparatus (1) for blood treatment. The method comprises installing, by use of a disposable arrangement, first and second flow circuits (C1, C2) separated by a semi-permeable membrane (25), the first flow circuit (C1) being connected for fluid communication with the apparatus (1) and the second flow circuit (C2) being connected to form a closed loop that includes a sterilizing filter (46) and, optionally, a container (30). The method further comprises performing backfiltration to transfer a human-compatible fluid from the first flow circuit (C1) to the second flow circuit (C2) through the semi-permeable membrane (25), and circulating (304) the human-compatible fluid in the closed loop of second flow circuit (C2), to thereby sterilize the human-compatible fluid by the sterilizing filter (46) and, optionally, collect a resulting sterile fluid in the container (30) for later use.

Dialysis machines comprising a feed arrangement to supply a dialysis fluid to a dialyzer during dialysis treatment and a return arrangement to remove the dialysis fluid from the dialyzer during dialysis treatment and forward it to an exit; a feed recirculation circuit to allow a fluid of the feed arrangement to be re-circulated in a fluid loop path comprising, at least a portion of, the feed arrangement and the feed recirculation circuit and a return recirculation circuit to allow a fluid of the return arrangement to re-circulate in an auxiliary fluid loop path comprising, at least a portion of, the return arrangement and the return recirculation circuit. A controller configured to perform disinfection by re-circulating a disinfectant and/or a heated fluid through said fluid loop path and/or through said auxiliary fluid loop path. The dialysis machine further comprises a feed forward arrangement connected to the fluid loop path and arranged to enable a fluid of the feed arrangement to be forwarded to the exit by-passing the auxiliary fluid loop path.

The invention relates to a dialysis treatment unit in which the connecting line to the central concentrate supply is also rinsed in the rinsing or cleaning process in order to prevent deposits therein.

A renal therapy apparatus includes a blood filter, a blood pump, a treatment fluid pump, and a control unit configured to control at least one of the blood pump or the treatment fluid pump during a filter cleaning sequence. In a first phase of the filter cleaning sequence, a first fluid including a blood-compatible and physiologically safe fluid is transferred back and forth across the insides and/or outsides of the blood filter. After the first phase, a second fluid is formed by mixing the first fluid with air. In a second phase of the filter cleaning sequence, the second fluid is transferred across the insides and/or outsides of the blood filter at least one time.

A hybrid hemodialysis (HD)/peritoneal dialysis (PD) system includes: a reservoir; a weigh scale operably coupled with the reservoir; and at least one controller programmed to run (i) an HD treatment in which blood is pumped to a blood compartment of a dialyzer, fresh HD dialysis fluid is pumped to a dialysis fluid compartment of the dialyzer, and used HD dialysis fluid is pumped from the dialysis fluid compartment of the dialyzer to the reservoir, and at a different time (ii) a PD treatment in which fresh PD dialysis fluid is pumped to a patient and used PD dialysis fluid is pumped from the patient to the reservoir.