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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]