Calcium, Plasma

From Taranaki Lab Manual

Tests:Calcium, Plasma
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Overview

Department Biochemistry 
Test Code PCCA
Synonyms Ca

Ca2+

Test Availability Monday - Sunday, testing routinely available out of hours
Turnaround Time 1 - 2 hours  
Stability – Add test 8 hours

Specimen Requirements

Specimen Type Plasma

Serum

Specimen Transportation
Preferred 7 mL Red-Top
Acceptable 5 mL Li-Hep Green-Top
Unacceptable
Pediatric Requirements 600 µL Li-Hep Microtainer

Aliquot Requirements

Sample Type Plasma

Serum

Preferred 100 µL
Minimum Volume
Aliquot Transportation

Clinical Information

Reference Intervals 2.2 - 2.6 mmol/L  
Test Method Abbott c8000 series analyser using Abbott reagents.   
Advanced Notice Not required  
Patient Preparation Not required

Comments

All Calcium requests will be reported with a corrected calcium value.

Corrected Calcium = Calcium + 0.012*(39.9 - Albumin)

Prolonged stasis during venepuncture and haemolysis will give false high values 

For baseline level, patient should be fasted for 12 hours and seated for 20 minutes prior to specimen collection.