GLUCOSE TOLERANCE TEST (GTT)
Types
- Glucose Tolerance test measures how well the body cells are able to absorb glucose, or sugar ,after you ingest a given amount of sugar. 75 gm of oral dose is the recommendation by WHO to be used in adults . The dose shall be drunk in 5 minutes. This protocol challenges the person’s body to process the glucose
For G...
Description
Fasting plasma glucose (measured before GTT) :
< 110 mg/dl Normal
110 – 125 mg/dl Borderline
>125 mg/dl Diabetic
A 1 hour GTT below 180 mg/dl is considered normal
For a 2 hr GTT with 75 g intake,
Glucose level <140 mg/dl is normal
140 -200 mg/dl – impaired glucose tolerance
>200 mg/dl at 2 hrs - Diabetic
When to get Tested
- When a person is aged 45 or older
- When a person of any age has risk factors(Overweight, physically inactive, PCOS , High BP , Low HDL level and high Triglyceride level, h/o cardio vascular disease)
- When there is s/s of high Glucose ( Increased Thirst, frequent urination , fatigue , blurred vision , slow healing wounds or infections )
Elevated Level
- Acute stress
- Diabetes
- Acromegaly
- Chronic kidney disease
- Hyperthyroidism
- Pancreatic cancer
Decreased Level
- Adrenal insufficiency
- Liver disease
- Hypothyroidism
- Renal failure
- Insulinoma
