'Continuum' suggests 'ongoing' and is the basis of a physicis and advanced maths area of work.

Are u looking at kidney function alone or in conjunction with/nutrition/normal osmatic cells functioning in the organs/overall body mass/equalibrium that has to be maintained between sodium and potasium.

Results of FBC tests/toilet reports/stool evidence vs food intake. Does there exist an electrolyte balance?

This may well be totally out of the area but open for comment ok.

Which clinical indicators (cues) are used to determine where on the fluid balance continuum patients are positioned?