Department
Chemical Pathology
Delphic Registration Code (Alpha Code)
PT50
Test Code (Numeric Code)
0156
Laboratory Handling
Sample Stability
1 day 2-8°C
Associated Tests
Synonyms
Gestational Diabetes screening test; Polycose challenge test; 50g Glucose screening test
Turnaround Time
4 hours
Available 24 hours
Specimen Type
- Plasma
Specimen Requirements
Tube/Container Type:
Preferred
- Fluoride (Grey Cap)
Preferred Sample Volume (ml)
4
Paediatric Specimen Requirements
Tube/Container Type:
Preferred
- Fluoride (Grey Cap)
Pre-testing Requirements
- Fasting is NOT required.
- Preferably conducted in the morning.
- If the patient arrives in a fasted state or after 11am testing will still be allowed.
- The patient will be given 50grams of Gluco-TT solution (350mls) to drink. It should be consumed within 5 minutes.
- The patient should stay at the waiting area and abstain from coffee, alcohol, food, gum, smoking or exercise throughout the procedure.
- After 60 minutes, a blood sample will be collected into Fluoride tube (grey top).
- The specimen should be transported promptly to the Biochemistry laboratory.
Last updated: 13/05/2026