Glucose Tolerance Test (GTT) with Insulin - ADULT


Test Name
Glucose Tolerance Test (GTT) with Insulin - ADULT
Test Code
GTTIN
Specimen Type

Fluoride Oxalate (for Glucose) AND Serum-Gel (for Insulin)

Minimum Volume
0.3mL Fluoride Oxalate AND 2mL Serum-GEL
Comments

Specimen Collection: This is a fasting test:

1. Collect Fasting Glucose and Insulin sample

2. Give 75g glucose drink to be consumed within 5 mins

3. Patient must not eat, drink, smoke or chew gum during test duration.

4. Collect 1hr Glucose and Insulin sample. (60 mins post drink)

5. Collect 1hr Glucose and Insulin sample. (120 mins post drink)

6. Send insulin sample on ice pillow to the laboratory.

If patient vomits or is 15 mins late, the test is cancelled and no further blood samples are collected. The patient must re-book for another day.

LAB NOTES: Allocate the one laboratory number to all samples without obscuring the relative collection times. Label samples clearly with the relative collection times e.g. 0, 1hr, 2hr. Insulin sample: Centrifuge, separate and freeze immediately on receipt.

Assay Performed
Biochemistry
RCH
9345 4200
Assay Frequency

Insulin - Monday to Friday as requested; Glucose - as requested

Acetylcholine Receptor Abs

Alcohol