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Glucose Tolerance Test (2 Specimens), plasma (Standard) [OGTT (2 samples)]

Test Code:

BC0145

Synonym(s):

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.

Method

 

Orderable as STAT?

Yes

Turn Around Time

Average 2 hrs (1 - 3 hrs)

Reference Value(s)

Fasting: <= 8.0 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

Additional Information

Critical Result:
OGTT (fasting) - > 10mmol/L
OGTT (2 hr) - > 15 mmol/L

Change History Notes

Others

Keywords

Glucose Tolerance Test (2 Specimens), plasma (Standard) [OGTT (2 samples)] BC0145
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