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Testing Laboratory

Waitematā | Northshore Hospital

Department

Chemical Pathology

Delphic Registration Code (Alpha Code)

SFT4

Test Code (Numeric Code)

0367

Laboratory Handling

Sample Stability

48 hours

Associated Tests

Synonyms

Free Thyroxine
FT4

Turnaround Time

1 day

Available from 08:00am to 04:00pm, 7 days a week

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

Paediatric Specimen Requirements

Tube/Container Type:

Preferred
  • Lithium Heparin PST- Gel (Light Green Cap)
Acceptable
  • Plain (Red Top)
  • SST II (Gold Cap)
Minimum Sample Volume (ml)

0.4

Last updated: 06/05/2026