Khajuria and Krahn developed 2 equations for predicting serum osmolality based on serum solutes, including the concentration of ethanol. The authors are from St. Boniface General Hospital and the University of Manitoba in Winnipeg, Manitoba, Canada.
Parameters:
(1) serum sodium in mmol/L
(2) serum potassium in mmol/L
(3) serum glucose in mmol/L
(4) serum urea in mmol/L
(5) serum ethanol in mmol/L
formula 1 for calculated serum osmolality in mOsm per kg water =