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Test Code CA Calcium Level, Total

Clinical System Name

Calcium Level, Total

Description

Abnormal concentrations of serum calcium may indicate malfunction of the parathyroid glands, bone diseases, carcinoma, malnutrition and malabsorption syndrome, Vitamin D deficiency, overdose with calcium-containing antacids, and renal diseases.

Sample Requirements

Specimen: Whole Blood

Container(s): Gold SST, Dark Green/Sodium Heparin, Red, Gold Microtainer, Lt. Green/Li Heparin Microtainer 

Preferred Vol: 1 mL

Minimum Vol: 0.5 mL

 

Notes:  Method is affected by hemolysis and exposure to RBC's. Method is not affected by icterus, heparin, or lipemia.

Processing Instructions

Reject due to: Age of specimen, hemolysis, prolonged exposure to RBC's

Spin: Y

Aliquot: Y

Temp: 2-8oC

Storage location: Core 5 Chemistry Refrigerator

 

Off-site collection: Avoid hemolysis. Spin blood, refrigerate serum or plasma.

Stability

 

Specimen Type Temperature Time
Serum or Plasma RT

≤ 4 H

Serum or Plasma 2-8oC

 22 D

Serum or Plasma -20oC or -70oC

365 D

 

Availability

STAT Performed TAT
Y 24/7 1 H

 

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Core Chemistry

Phone Number: 206-987-2617

 

Reference Range

 

 Age mG/dL
0 - 1 W 7.5 - 11.0
> 1 W 8.7 - 10.7
Critical Levels

6.0   14.0

 

Results from recumbent patients may be 3% lower. Blood collected with stasis may have calcium concentrations 15% higher.
 

Methodology

Method: Colorimetric method by Vitros 4600

Analytical Volume:  Vitros 4600: 0.02 mL + 0.03 mL dead space

                                     

CPT Codes

82310

Critical Values

6.1 mg/dL

≥13.9 mg/dL

 

Results from recumbent patients may be 3% lower. Blood collected with stasis may have calcium concentrations 15% higher.