Figure 41-5 The strong ion gap apparent (SIDa) is the sum of the total concentration of weak ions (ATOT ), such as albumin (Alb) and inorganic phosphate (Pi), plus the concentration of bicarbonate ions [HCO3 - ]. SID effective (SIDe) is the real SID. The difference between the two is made up of unmeasured anions (UMAs).


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