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HelpTest ID CAI Calcium, Ionized, Serum
Useful For
Assessing calcium states during liver transplantation surgery, cardiopulmonary bypass, or any procedure requiring rapid transfusion of whole blood in neonates and critically ill patients
Second-order test in the evaluation of patients with abnormal calcium values
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Serum SSTSpecimen Required
Container/Tube: Serum gel or serum gel microtainer
Specimen Volume: Full tube
Collection Instructions:
1. Allow blood to clot for 30 minutes.
2. Serum gel tube/microtainer must be centrifuged within 1 hour of collection. Centrifuge with stopper in place for 7 minutes at 3000 rpm to ensure that the gel barrier separates the serum and cells.
3. Keep specimen anaerobic; do not aliquot.
4. Test cannot be combined with other testing. Separate specimens must be submitted when multiple tests are ordered.
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum SST | Refrigerated | 7 days | SERUM GEL TUBE |
Reference Values
IONIZED CALCIUM
≤13 days old: Not established
14 days-<1 year: 5.21-5.99 mg/dL
1-<2 years: 5.04-5.84 mg/dL
2-<3 years: 4.87-5.67 mg/dL
3-23 years: 4.83-5.52 mg/dL
24-97 years: 4.57-5.43 mg/dL
≥98 years: Not established
pH
≤13 days old: Not established
14 days-97 years old: 7.35-7.48
≥98 years old: Not established
For International System of Units (SI) conversion for Reference Values, see www.mayocliniclabs.com/order-tests/si-unit-conversion.html.
Day(s) Performed
Monday through Sunday
CPT Code Information
82330
Report Available
Same day/1 dayReject Due To
| Gross hemolysis | Reject |
| Tubes less than 50% full Specimens that have been aliquoted, opened, or poorly centrifuged |
Reject |
Secondary ID
8378Forms
If not ordering electronically, complete, print, and send a Kidney Transplant Test Request with the specimen.