Status assessment of an individual undergoing peritoneal dialysis

An arrangement for determining at least one status parameter of an individual undergoing peritoneal dialysis, the arrangement comprising:

• at least one sensor arranged in a fluid circuit and configured to provide data samples representative of a concentration of one or more solutes in a treatment fluid flowing through the fluid circuit;
• an input for receiving:
• first data indicative of a flow rate as a function of time of the treatment fluid into and out of a peritoneal cavity, via a peritoneal cavity access of the individual, during one or more fluid exchange cycles, wherein each fluid exchange cycle comprises a fill phase, a dwell phase, and a drain phase, and
• second data from the at least one sensor comprising measured data samples representing the concentration of one or more solutes in the treatment fluid in the peritoneal cavity at two or more time points during the one or more fluid exchange cycles;
• a first computation module configured to compute, based on the first data and by use of a mathematical model of a transport of water and solutes through a peritoneal membrane in the peritoneal cavity, estimated data samples representing the concentration of the one or more solutes in the treatment fluid in the peritoneal cavity at the two or more time points;
• and
• a second computation module configured to determine the at least one status parameter by comparing the measured data samples in the second data and the estimated data samples computed by the first computation module.