The determination of whole blood magnesium concentration in uremics on chronic dialysis.

The determination of whole blood magnesium concentration (MgT) was investigated in uremics on chronic dialysis with a broad range of hematocrit (Ht) and of plasma magnesium concentration (MgP). In view of the inverse correlation between erythrocyte magnesium concentration (MgC) and Ht in dialyzed uremics, as shown in our previous paper, it was possible to derive a formula which expressed MgT in terms of MgP and Ht. By exploring the predictive power of this formula, it can be concluded that MgT can be calculated directly from MgP and Ht.