Friday, February, 10, 2012

Calcium - ionized

Table of Contents

Alternative Names

Free calcium; Ionized calcium


Normal Values

Normal values may vary slightly from laboratory to laboratory.

  • Children: 4.4 - 6.0 milligrams per deciliter (mg/dL)
  • Adults: 4.4 - 5.3 mg/dL

What abnormal results mean

Greater-than-normal levels may be due to:

  • Hyperparathyroidism
  • Immobilization
  • Decreased urinary calcium levels of unknown cause (idiopathic hypocalciuria)
  • Metastatic bone tumor
  • Milk-alkali syndrome
  • Multiple myeloma
  • Paget's disease
  • Sarcoidosis
  • Too much vitamin D
  • Certain types of tumors
  • Use of thiazide diuretics

Lower-than-normal levels may be due to:

  • Hypoparathyroidism
  • Malabsorption
  • Osteomalacia
  • Pancreatitis
  • Renal failure
  • Rickets
  • Vitamin D deficiency

Images

Review Date: 08/31/2010
Reviewed By: A.D.A.M. Editorial Team: David Zieve, MD, MHA, and David R. Eltz. Previously reviewed by David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine (5/13/2009).

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)