Calcium

This is a blood test to evaluate the parathyroid function and the bone metabolism to help monitor patients with hyperparathyroidism, kidney failure, kidney transplantation, and various malignancies (cancerous tumors). It is also used to monitor calcium levels following large blood transfusions.

PREPARATION FOR TEST

No preparation or fasting is necessary unless fasting would be required for any other part of a test being done the same day.

NORMAL FINDINGS

Total calcium by age

  • Less than 10 days

  • mg/dl: 7.6-10.4

  • mmol/L: 1.9-2.6

  • Umbilical

  • mg/dl: 9-11.5

  • mmol/L: 2.25-2.88

  • 10 days-2 years

  • mg/dl: 9-10.6

  • mmol/L: 2.3-2.65

  • Child

  • mg/dl: 8.8-10.8

  • mmol/L: 2.2-2.7

  • Adult

  • mg/dl: 9-10.5

  • mmol/L: 2.25-2.75

Ionized calcium by age

  • Newborn

  • mg/dl: 4.20-5.58

  • mmol/L: 1.05-1.37

  • 2 months-18 years

  • mg/dl: 4.80-5.52

  • mmol/L: 1.20-1.38

  • Adult

  • mg/dl: 4.5-5.6

  • mmol/L: 1.05-1.30

Ranges for normal findings may vary among different laboratories and hospitals. You should always check with your doctor after having lab work or other tests done to discuss the meaning of your test results and whether your values are considered within normal limits.

MEANING OF TEST

Your caregiver will go over the test results with you and discuss the importance and meaning of your results, as well as treatment options and the need for additional tests if necessary.

OBTAINING THE TEST RESULTS

It is your responsibility to obtain your test results. Ask the lab when and how you will get your results.