This algorithm is intended for use with additional UpToDate content on hypocalcemia.
PTH: parathyroid hormone. * The normal range for serum calcium is approximately 8.6 to 10.2 mg/dL (2.15 to 2.54 mmol/L). Interpretation of a specific abnormal test result should be based upon the reference range reported with that result. Measured calcium concentration should be corrected for any abnormality in serum albumin using a calcium correction formula. ¶ Treatment should never be delayed if blood for diagnostic studies cannot be collected. Δ A serum PTH within the reference range in a patient with hypocalcemia is inappropriately normal. ◊ Hypocalcemia should resolve within minutes or hours after restoration of normal serum magnesium concentrations if hypomagnesemia was the cause of the hypocalcemia.
