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Test Directory

7345 Calcium, Ionized

Specimen Type
Specimen Stability
Reference Range
Serum
7 Days, Refrigerated
4.8 - 5.6 mg/dL

Specimen Requirements

Specimen Type: Serum
Container: 1 Serum Separator Tube (SST)s
Temperature: Refrigerated
Preferred Vol: 4.00 mL
Min Vol: 2.00 mL

Method

Ion Selective Electrode (ISE)

Schedule

Tuesday - Saturday

Turn-Around Time

Send-Out

Instructions/Notes

Collect blood in a gel barrier tube. Let clot and spin immediately with cap on. Do not open tube. Ship the unopened gel barrier tube refrigerated. Do not freeze.

Clinical Utility

Ionized calcium represents the true bioavailable calcium in the circulation. In situations where the total calcium is normal, but does not fit the clinical picture, a determination of the ionized calcium will, many times show an elevation in the bioavailable calcium.

CPT Codes

82330

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