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Test Code FERR Ferritin

Additional Codes

Cerner

NextGen

Ferritin, S

Ferritin, S

Useful For

Ferritin functions as an intracellular site of iron storage. Clinically significant concentrations are found in serum, and the concentration of serum ferritin is directly related to total body iron stores.  Serum ferritin concentrations are determined to evaluate iron stores in normal patients, patients with iron deficiency or iron overload, and to monitor the response to iron therapy. 

Methodology

Immunometric

Patient Preparation

None

Collection Instructions

Standard phlebotomy practices.

Specimen Requirements

Container

Specimen Type

Tube

Serum

 or 

SST

 or  or 

 

Stability

Storage

Temperature

Stability

Room Temperature

18-28°C

Not recommended

Refrigerated

 2-8°C

≤ 5 days

Frozen

≤-20 °C

4 weeks

Thaw 1 time only

Rejection Criteria
  • Gross Hemolysis
  • Turbid Specimens

Result Reporting and Reference Values

Reported in ng/mL

 

Low

High

Critical

Normal Male 18-150 years

17.9

464

N/A

Normal Female 18- 50 years

6.24

137

N/A

Normal Female 50- 150 years

11.1

264

N/A

Reflex Testing

None

Limitations

  • Ortho reports a bias with the following:
    • Biotin can cause a negative bias
  • Ortho reports no significant effect with the following:
    • Bilirubin up to 20 mg/dL
    • Hemoglobin up to 500 mg/dL