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Test Code Glucose 0, Glucose 60, Glucose 120 Glucose Tolerance Test (3 points)

Specimen Requirements

Specimen Type: Plasma

Container/Tube: Grey Top (Sodium Fluoride/Potassium Oxalate)
Volume: 4.5mL
Minimum Volume: 0.5mL plasma
Collection Instructions: Patient should be fasted for at least 8 hours. Mixed specimen well to avoid clotting. Centrifuge within 2 hours.

Sample Stability

** Preferred temperatures for storage prior to and during shipping to NUH **

 

Specimen Type: Plasma (Stabilized with sodium fluoride/potassium oxalate)
Ambient: 2 day
Refrigerate: 7 days
Frozen: 3 months

 

Reference Interval

  Non-diabetic Gestational Diabetes Possible pre-existing Diabetes
Fasting 3.0 - 5.0 mmol/L 5.1 - 6.9 mmol/L => 7.0 mmol/L 
60 min ≤ 9.9 mmol/L  => 10.0 mmol/L  
120 min ≤ 8.4 mmol/L   8.5 - 11.0 mmol/L  => 11.1 mmol/L

 

Days and Times Performed

24 hours, TAT 1 day

Methodology

See individual test listings for Methodology

 

Enzymatic (Hexokinase / G-6-PDH)

Service Code

31200

Update

Last updated 26/02/2022

Unacceptable Condition

 

Haemolysis NA
Icterus NA
Lipaemic NA
Others NA

 

Testing Laboratory

National University Hospital

Clinical Chemistry, 67724346