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Table 2 Changes in serum total and ionised calcium, magnesium and phosphate

From: Acute fluid shifts influence the assessment of serum vitamin D status in critically ill patients

  T1 T2 T3 T4 T5
Total calcium (mmol/L) 2.2 ± 0.1 1.9 ± 0.1* 2.1 ± 0.2* 2.1 ± 0.1* 2.3 ± 0.1*
i[Ca] (mmol/L) 1.1 ± 0.1 0.9 ± 0.1* 1.1 ± 0.1 1.1 ± 0.1 1.2 ± 0.04
Mg++ (mmol/L) 1.1 ± 0.4 1.3 ± 0.4 1.3 ± 0.2 1.1 ± 0.2 0.9 ± 0.1*
PO43- (mmol/L) 1.1 ± 0.2 0.9 ± 0.2* 1.0 ± 0.2* 1.2 ± 0.3 1.1 ± 0.3
  1. *Significantly different from baseline (P < 0.01).T1 - baseline, T2 - five minutes after onset of cardiopulmonary bypass (CPB) (time of maximal fluid effect), T3 - on return to the intensive care unit, T4 - 24 hrs after surgery, T5 - five days after surgery.