Test Code CA Calcium, Total
Additional Codes
| EPIC | LAB4040 | 
Clinical Significance
Calcium measurements are used in the diagnosis and treatment of parathyroid disease, a variety of bone diseases, chronic renal disease and tetany (intermittent muscular contractions or spasms). Urinary calcium measurement is used in the differential diagnosis of absoptive hypercalcuiria and hypercalcuiria caused by hyperparathyroidism, hyperthyroidism, Paget's disease or "renal leak" type of calciuria as seen in renal tubular acidosis.
Source: Beckman Coulter Unicel, CALC IFU. REF #A18471AM 12/22/15
Methodology
Indirect potentiometry (Beckman Coulter UniCel DxC 660i)
Sample Type
| Preferred Sample Type | |
|---|---|
| Light green top - Plasma | |
| Acceptable Sample Type(s) | |
|---|---|
| Dark green top - Plasma | |
| Yellow top - Serum | |
| Red top - Serum | |
Centrifuge: Yes
Specimen Minimum Volume
0.5 mL
Specimen Stability
| Temperature | Time | 
|---|---|
| Ambient (18-25°C) | 8 hours | 
| Refrigerated (2-8°C) (store) | 48 hours | 
| Frozen (-15 to -20°C) | 1 month | 
Separate plasma or serum from cells within 2 hours.
Reference Ranges
| Normal Range | |
|---|---|
| >1 Month Old | 8.5 - 10.5 mg/dL | 
| <1 Month Old | 7.6 - 11.0 mg/dL | 
| Critical Values | 
|---|
| <6.6 mg/dL | 
| >13.9 mg/dL | 
| Technical Range | 
|---|
| 2.0 - 20.0 mg/dL | 
Rejection Criteria
| Hemolysis | N/A | 
|---|---|
| Icteric | N/A | 
| Lipemia | N/A | 
Availability
| Performed | STAT | 
|---|---|
| 24/7 | Yes | 
Performing Laboratory
MultiCare Yakima Memorial Hospital Laboratory
Lab Department
Chemistry
CPT Code
82310
LOINC
17861-6 Calcium [Mass/Vol]