Calcium (Total)

Label Mnemonic:	CA
Epic code:	LAB53
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Chemistry
6240 RCP
356-3527

Specimen(s):

Plasma

Collection Medium:

Plasma Separator Tube 4.5 mL

Alternate Collection Media:

Call laboratory for additional acceptable specimen collection containers.

Minimum:

3 mL whole blood from light green top tube or 1 light green Microtainer^® for pediatric patients

Testing Schedule:

24 hrs/day, 7 days a week, including holidays.

Turn Around Time:

1 hour (upon receipt in laboratory)

Reference Range:

8.5-10.5 mg/dL

Pediatric Reference Ranges:

Age             Male      Female    Units
Birth-30 days   8.5-10.6  8.4-10.6  mg/dL
31 days-1 year  8.7-10.5  8.9-10.5  mg/dL
1-6 years       8.8-10.6  8.5-10.5  mg/dL
7-12 years      8.7-10.3  8.5-10.3  mg/dL
13-15 years     8.5-10.2  8.4-10.2  mg/dL
16-18 years     8.4-10.3  8.6-10.3  mg/dL

Critical value: <6.0 mg/dL and >13.0 mg/dL

Comments:

Refer to BD Microtainer^® Tubes product sheet for detailed sample collection instructions.

Test Limitations:

Hemolysis: No significant interference up to an H index of 1000 (approximate hemoglobin concentration: 1000 mg/dL).

Lipemia: No significant interference up to an L index of 1000 (approximate triglycerides concentration: 2000 mg/dL). Note there is poor correlation between turbidity and triglyceride concentration.

Icterus: No significant interference up to an I index of 60 (approximate conjugated and unconjugated bilirubin concentration: 60 mg/dL).

Criterion: Recovery within plus or minus 10% of initial value.

Reference:
Glick MR, Ryder KW, Jackson SA. Graphical Comparisons of Interferences in Clinical Chemistry Instrumentation. Clin Chem 1986;32:470-474.

Methodology:

Colorimetric

CPT Code:

82310

See Additional Information:
Chemistry Critical Lab Values
Chemistry Pediatric Reference Ranges