Table 2

Rules for isolated abnormalities in strong ion difference (SID) and total concentration of weak acid (ATOT)

SID/ATOT
Isolated abnormality
Result

SID
Increased
Metabolic alkalosis
SID
Decreased
Metabolic acidosis
ATOT
Increased
Metabolic acidosis
ATOT
Decreased
Metabolic alkalosis

Morgan Critical Care 2005 9:204   doi:10.1186/cc2946