Calcium

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Testing Laboratories

Waitematā | Northshore Hospital
Waitematā | Waitakere Hospital

Department

Chemical Pathology

Delphic Registration Code (Alpha Code)

SCA

Test Code (Numeric Code)

0110

Laboratory Handling

Sample Stability

24 hours

Associated Tests

Synonyms

CA

Turnaround Time

2 hours

Specimen Type

  • Plasma
  • Serum

Specimen Requirements

Tube/Container Type:

Preferred
  • Lithium Heparin - Non-gel (Green Cap)
Acceptable
  • Plain (Red Top)
  • SST II (Gold Cap)
Preferred Sample Volume (ml)

4

Minimum Sample Volume (ml)

1

No of Samples Required

1

Paediatric Specimen Requirements

Tube/Container Type:

Preferred
  • Heparin (Microtainer)
Acceptable
  • Plain(Microtainer)
  • SST(Microtainer)
Minimum Sample Volume (ml)

0.4

Pre-testing Requirements

Fasting for 12 hours and seated for 20 minutes prior to venepuncture are preferred for accurate baseline level.
Prolonged stasis during venepuncture and haemolysis will give false high values.
Albumin should always be measured in conjunction with calcium.

Last updated: 15/09/2026