Abstract: A system and method for controlling a renal therapy device is provided. The system comprises a controller for performing a method comprising: receiving a first power level of a first battery to determine if the first power level of the first battery is above a threshold value and receiving a second power level of a second battery to determine if the second power level of the second battery is above the threshold value. When the first power level is above the threshold value, the controller causes the renal therapy device to be powered by the first battery. When the first power level is below the threshold value, and the second power level is above the threshold value, the controller causes the renal therapy device to be powered by the second battery. The first battery is electrically isolated from the second battery.

Abstract: A portable and wearable renal therapy system is provided. The system comprises: a purification device configured to remove toxins from process fluid and deliver a therapeutic substance to the process fluid; and a drug delivery device coupled to the purification device. The drug delivery device comprises: a reservoir for a fluid comprising a therapeutic substance; and a fluid connection coupling the drug delivery device with the purification device, the fluid connection configured for fluidly communicating the reservoir with the process fluid.

Abstract: A sorbent cartridge for use in a portable wearable renal therapy system, and a method of using same is provided. The sorbent cartridge comprises: a inlet and an outlet, the inlet configured to receive process fluid from renal therapy device and the outlet configured to discharge treated process fluid; a hydrogel configured to absorb and adsorb a toxin from the process fluid without use of a dialysate to purify the process fluid. The inlet and the outlet are each configured to releasably couple to the renal therapy device for removing the sorbent cartridge.