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Ionized Calcium (Ca++)
Message
Performed in the Chemistry Laboratory, x5820
Test Code
IONCA
CPT Codes
82330
Includes
Ionized Ca, pH
Preferred Specimen
Whole blood drawn in either a lithium heparin syringe (blood gas syringe) or a lithium heparin green top tube.
Serum (Gold Top SST) is not acceptable.
Serum (Gold Top SST) is not acceptable.
Minimum Volume
1 mL
Instructions
This test should be run as soon as possible
Transport Container
Heparinized Syringe/Green Top
Transport Temperature
Room temperature
Specimen Stability
Unopened room temperature: 8 hours
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum samples (gold top SST)
Methodology
Ion selective electrode
Setup Schedule
This assay is performed 24 hours/day, 7 days/week.
Reference Range
Reference Range: 4.2-5.2 mg/dL
Critical Value: Less than or equal to 3 mg/dL or greater than or equal to 8 mg/dL.
Critical Value: Less than or equal to 3 mg/dL or greater than or equal to 8 mg/dL.
Clinical Significance
This test is used to assess calcium states during liver transplantation surgery, cardiopulmonary bypass, or any procedure requiring rapid transfusion of whole blood in neonates and in critically ill patients. It is also used in the evaluation of patients with abnormal calcium values.
