Emergency situations are covered with pre-mixed bags of dialysis solution by NxStage. Every patient trains on using bags even if they will primarily use the PureFlow. The availability of the bags is also what makes it possible for a NxStage patient to travel with their system. Users of the Fresenius Baby-K are tied to the reverse osmosis water system that must be installed for their home hemodialysis. I don't know what the Fresenius users can do in an emergency except find an open dialysis center.