BC0145
Specimen Container |
Sodium fluoride tube (Adult)
Fluoride heparin tube (Paeds)
|
Specimen Requirement |
Collect blood to the mark in specimen tube. The OGTT should be preceded by at least 3 days of adequate carbohydrate diet. It should be performed in the morning after the patient fasted at least 10 hours(but no longer than 16 hours). Adult: 75g load. Child: 1.75g/kg Invert blood 5 times after blood collection ensures the anticoagulant is well mixed with the blood. This will ensure results are reliable. |
Specimen Storage/Transport |
OGTT timed specimens
may be sent together or separately to the laboratory. |
Orderable as Urgent? | Yes |
Turn Around Time |
Average 2 hrs (1 - 3 hrs)
|
Reference Value(s) |
Fasting: <= 6.0 mmol/L 120 minutes: < 7.7 mmol/L Fasting (mmol/L) Impaired fasting glucose (IFG) : 6.1 – 6.9 Impaired glucose tolerance (IGT) : < 7.0 Diabetes: >= 7.0 2-hour (mmol/L) Impaired fasting glucose (IFG) : < 7.8 (if measured) Impaired glucose tolerance (IGT) : 7.8 – 11.0 Diabetes: >= 11.1 |
Testing Laboratory Location | KKH |
Laboratory | Clinical Chemistry |
Contact Number | 6394 1383 |
Day and Time Performed |
Mon to Fri: 0800 hr - 1730 hr
Sat: 0800 hr - 1230hr |
Orderable on CPOE? | Yes |
Downtime Form | |
Additional Information |
Critical
Result:
OGTT (fasting) - > 10mmol/L OGTT (2 hr) - > 15 mmol/L |
Change History Notes
19 Oct 2021 03:55 PM
Updated Specimen Requirement, Specimen Storage, Reference Value(s) and A dditional Information.
Last Updated - 05 Apr 2025
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