Category
Routine chemistry
Sub Category
Endocrine
Synonyms/Aliases
N/A
Abbreviations
OGTT; 75g OGTT
Type
profile/ panel (bundled tests)
3-5 days
RESULTS READY AFTER 4 HOURS
Method
SPECTROPHOTOMETRIC ENZYMATIC
Temp
TEMPRATURE BE REFRIGIRATED
Setup
ALL WORKING DAYS
Components Parameters
0 hours (fasting), 2-3 hours post load.
PRE-ANALYTIC CONSIDERATIONS
Test Ordering Instructions
FILL OUT TEST REQUEST FORM FULLY & LEGIBLY.
Patient preparation
FASTING FOR AT LEAST 8 HOURS REQUIRED.
Sample type
FLUORIDE/ OXALATE PLASMA. MULTI-SAMPLING IS REQUIRED I.E. BASELINE FASTING SAMPLE; THEN 1 & 2 HOUR POST LOAD SAMPLES. SAMPLE LABELS MUST INCLUDE COLLECTION SEQUENCE E.G. 0 (BASELINE), 1HR, 2HR SAMPLE
Container/ preservative
FLUORIDE/ OXALATE (GREY TOP) VACUTAINER
Sample volume
AT LEAST 1 ML FLUORIDE/ OXALATE PLASMA EACH.
Rejection criteria
LABELING ISSUE (UNLABELED/ MISLABELED); MISSING REQUEST FORM; MISMATCH BETWEEN REQUEST FORM & SAMPLE DETAILS; MISSING AGE/ GENDER; WRONG SAMPLE TYPE; INSUFFICIENT SAMPLE; GROSS HEMOLYSIS; NONFASTING SAMPLES.
Other Instructions
URINE SAMPLES FOR URINE GLUCOSE TESTING ARE NOT ROUTINELY COLLECTED.
Reference intervals
AS PER THE LATEST AMERICAN DIABETIC ASSOCIATION CONSENSUS GUIDELINES.
Clinical Utility
SCREENING & DIAGNOSIS OF PREDIABETES & DIABETES MELLITUS (DM)
Test Limitations/ Confounders
NOT INTENDED FOR PREGNANT WOMEN/ DIAGNOSIS OF GDM. FOR THISN, REFER TO 75g OGTT, GESTATIONAL