CrCl	creatinine clearance [ml/min]
CRP	serum c-reactive-protein concentration [mg/dl]
CreaS	serum creatinine concentration [mg/dl]
CreaU	urine creatinine concentration [mg/dl]
EEVCO2	energy expenditure derived from VCO2 [kcal/d]
EFWC	electrolyte-free water clearance [ml/d]
FWC	free water clearance [ml/d]
GlucS	serum glucose concentration [mg/dl]
ICU	intensive care unit
INN	total nitrogen intake [g/d]
KUr	urine potassium concentration [mmol/l]
LOS	length of stay [d]
NaS	serum sodium concentration [mmol/l]
NaUr	urine sodium concentration [mmol/l]
OsmoPl	plasma osmolality [mosmol/kg]
OsmoUr	urine osmolality [mosmol/kg]
OsmoUrea:OsmoRest	ratio of urine osmolality due to urea and not due to urea
OUTUr	total urine output [ml/d]
PDMS	patient data management system
TBSA	total body surface area [%]
UreaS	serum urea concentration [mg/dl]
UreaUr	urine urea concentration [mg/dl]
UreaGR	urea generation rate [g/d]
Urea:Crea	serum urea to creatinine ratio [mg/dl:mg/dl]