Definition
Formula is “Corrected” Ca (mmol/L) = Ca “measured” (mmol/L) +/- 0.02 (40 – albumin (g/L))
A patient’s calcium is 2.55mmol/l and albumin is 35g/l. What is the patient’s corrected calcium level?
Corrected calcium is: 2.55 + 0.02 (40 35) = 2.65mmol/l
What does this level indicate?
This indicates that hypercalcaemia is present.
| Definition | Serum calcium level |
|---|---|
| Normal | 2.2-2.6mmol/l |
| Hypercalcaemia | >2.6 mmol/l |
| Hypocalcaemia | <2.2mmol/l |