Test Category: Biochemistry
Investigation Name:Glucose Tolerance Test
Alias or Abbreviation:GTT
Accreditation:UKAS Accredited ISO15189:2022 On scope
Pathology Laboratory:Clinical Chemistry/ Biochemistry
Requestable Seperately?Yes
Units:mmol/l
Minimum Sample Volume:1 mL at each time point
Expected Turnaround Time:1 working day from receipt
Test Code:OGTT
Sample Type:
Fluoride Oxalate Tube (Grey top)Complex Reference Range:Diabetes: Fasting glucose >= 7.0 mmol/L or 2hr glucose >= 11.1 mmol/L (>= 7.8 mmol/L in pregnancy).
Impaired glucose tolerance: 2 hr glucose 7.8-11.0 mmol/L
Impaired fasting glucose: 6.1-6.9 mmol/L (>= 5.6 mmol/L in pregnancy
Referred to Another Laboratory?No
Site Sample Tested:All acute sites
