| Test Name: |
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Calcium, Ionized
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| Test Code(s): |
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ICA / XICAL
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| CPT Code(s): |
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82330
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| Methodology: |
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Ion Selective Electrode
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| Days Performed: |
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Daily, 24 hours.
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| Turnaround Time: |
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Stat: 1 hour. All requests processed stat.
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Specimen Requirements
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| Specimen: |
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Blood
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| Collection Instructions: |
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Draw without tourniquet if possible. Tube MUST be allowed to fill completely. For faster turnaround, see Calcium, Ionized, Whole Blood.
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| Collection Container: |
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Preferred: Red cap with yellow ring (SST)
Also Acceptable:
Red top
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| Collection Volume: |
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Preferred: Full 4 mL tube
Pediatrics: Full 2 mL tube
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| Sample Analyzed: |
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Serum
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| Volume Required: |
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Preferred: 4 mL
Pediatrics: 2 mL
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| Specimen Processing: |
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Centrifuge to form a complete barrier.
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| Specimen Transport: |
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Transport specimen to laboratory immediately.
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| Outreach Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220) with coolant pack if coming from outreach location.
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| Unacceptable Criteria: |
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Green top tubes are not acceptable. Microtainer tubes are not acceptable.
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| Stability: |
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Ambient: Unopened, uncentrifuged- 2 hours; Unopened, centrifuged- 4 hours
Refrigerated: Unopened, centrifuged- 4 days
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Interpretation
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Reference Interval:
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| Age 1 month and up: |
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| Actual ICA |
4.60-5.20 mg/dL |
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Calculated ICA corrected to pH 7.4
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4.70-5.25 mg/dL |
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| Test Limitations: |
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Add-on requests for serum ionized calciums will not be accepted if sample has been previously opened and exposed to air. The alternative will be to add a whole blood ionized calcium (WBICA) to a blood gas previously drawn and sent to lab.
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| Critical Calls: |
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View
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