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Test Code LAB53 Calcium, Total, Plasma

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Colorimetric (NM-BAPTA)

Literature Reference:

Package insert: Calcium reagent CA2. Roche Corporation, 07/2022.

Specimen Requirements

Note: This test is also available as part of #LAB15 Basic Metabolic Panel (BMP),  #LAB17 Comprehensive Metabolic Panel (CMP), and #LAB19 Renal Function Panel. 

 

Patient Preparation:

Fasting specimen is preferred but not required.

 

Specimen Type: Plasma

Container/Tube: Mint-green top (lithium heparin)

Specimen Volume: Full tube

 

Collection Instructions: Avoid prolonged venous stasis when drawing specimen.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time:
STAT: 1 hour after receipt in laboratory 
Routine: 2 to 4 hours after receipt in laboratory

Test Classification and CPT Coding

82310

Reference Values

0 - 1 year: 8.6-11.0 mg/dL
> 1 - 2 years: 8.6-10.7 mg/dL

> 2 years: 8.5-10.3 mg/dL

Critical result (automatic call-back): ≤ 6.5 mg/dL or ≥ 14.0 mg/dL

Literature References:

1. Rifai N, Horvath AR, Wittwer AT eds: Textbook of Clinical Chemistry and Molecular Diagnostics 6th ed: Chapter 64, p. 1422, Elsevier, St. Louis, MO 2018.

2. Ladenson JH, McDonald JM (Eds). Multiple Myeloma and Hypercalcemia (Washington University case conference). Clin Chem 25:1821-1825, 1979.

3. Kang PK, Scott MG, Joe B, Narra V, Heiken J, Parvin CA.  Model for Predicting the Impact of Gadolinium on Plasma Calcium Measured by the o-Cresolphthalein Method.  Clinical Chemistry 2004; 741-746.

Specimen Transport Temperature

Ambient

Additional Information

For BJH Laboratory Use Only
Alternate Tube:

1 dark green-top (lithium heparin) tube
1 red or red/gray top tube

Laboratory Processing Instructions:

Test performed in BJH Core Lab.  Processed by automated line for delivery to the Cobas 8000. Completed specimens are stored refrigerated for 5 days. 

Test performed in South County Siteman and Ambulatory Cancer Building Lab.  Centrifuge sample and deliver to the Cobas.  Completed specimens are stored refrigerated for 5 days. 

Special Instructions

See Analyte Stability Chart under General Information for a complete list.

LOINC Code Information

Name LOINC Code
Calcium, Total 17861-6