Test

Glucose OGTT 75 gm / Oral Glucose Tolerance Test - 6 samples

₹1,000 ₹800

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Also Known As

#1) Extended GTT (6 Samples) #2) 2.5-Hour Glucose Tolerance Test #3) Formal OGTT 75g #4) Comprehensive Glucose Curve Audit #5) Serial Glucose and Urine Screen #6) Metabolic Sugar Stress Profiling #7) Hypoglycemia Diagnostic Curve #8) Fractional Glucose Tolerance Test #9) Renal Threshold for Glucose Test #10) 75g Carbohydrate Metabolism Study #11) Multi-Point Glucose Challenge #12) GTT with Urine Glycosuria Audit #13) Pancreatic Insulin Response Challenge #14) Standard 6-Point Metabolic Baseline #15) Hexokinase Extended OGTT

Test Parameters Included

Fasting Blood Glucose
Fasting Urine Glucose
Blood Glucose (1/2 hr)
Urine Glucose (1/2 hr)
Blood Glucose (1hr)
Urine Glucose (1 hr)
Blood Glucose (1 1/2 hr)
Urine Glucose (1 1/2 hr)
Blood Glucose (2 hr)
Urine Glucose (2 hr)
Blood Glucose (2 1/2 hr)
Urine Glucose (2 1/2 hr)
Blood Glucose (Fasting to 2.5 Hours): Six blood samples are taken to monitor the rise and fall of your blood sugar. The 1-hour mark usually shows the peak, while the 2.5-hour mark shows if your body has successfully returned to a baseline state.
Urine Glucose (6 Corresponding Samples): At each blood draw interval, a urine sample is collected. This helps determine your "Renal Threshold"—the blood sugar level at which your kidneys can no longer hold back sugar and begin leaking it into your urine.

Department

CLINICAL BIOCHEMISTRY

Methodology

Hexokinase : We utilize the Hexokinase enzymatic method for blood glucose analysis. This is the most accurate and specific method available, ensuring that the results for all six samples are consistent and not affected by other substances in the blood. Urine glucose is analyzed via Dipstick/Chemical Strip technology.

Sample Required

Na Fluoride, URINE (5ML)

Preparation

* Strict Fasting: An 8 to 12-hour overnight fast is mandatory. * 3-Day Lead-up: Eat a normal diet containing at least 150g of carbohydrates daily for three days before the test. * Physical Rest: You must remain at the lab for the entire duration (roughly 3 hours). You should stay seated and avoid walking or exercise, as physical activity burns glucose and will skew the results. * The Drink: You will be given a 75g glucose solution to finish within 5 minutes. * No Smoking/Food: Do not eat, smoke, or chew gum during the test period. Small sips of plain water are permitted.

Schedule Report

6 Hours

Emergency Report

Yes

Frequently Asked Questions

Why are there 6 samples?

This provides a complete "picture" of your metabolism. Shorter tests might miss the "peak" or a late-stage "drop" in sugar.

Why does the report take 6 hours?

All 6 blood and 6 urine samples are processed and cross-referenced by our automated systems, followed by a final review by a Pathologist.

What if I can't hold my urine for 30 minutes?

You will be asked to try and provide a sample at each draw. The lab technician will guide you through the timing.

Can I drink the glucose over 20 minutes?

No, it must be finished quickly (within 5 mins) to ensure the "sugar load" hits your system all at once for an accurate curve.

Why is "Hexokinase" mentioned?

It is the "Gold Standard" lab method, ensuring your result is the most precise possible.

Can I go for a walk while waiting?

No. Activity lowers blood sugar and will make your body look more efficient at processing sugar than it actually is.

Is it normal to feel dizzy during the test?

Some people feel a "sugar rush" or a slight crash. If you feel very unwell, notify the lab staff immediately.

What is the "Renal Threshold"?

It’s the blood sugar level (usually around 180 mg/dL) where the kidneys start letting sugar spill into the urine.

Can I take this test if I'm already on Insulin?

Usually, no. This test is for diagnosis and screening, not for monitoring established insulin-dependent diabetes.

Does the 2.5-hour sample matter?

Yes, it helps detect "Late-phase Reactive Hypoglycemia," where sugar levels drop too low after an initial spike.

Why must I fast for 8 hours?

To ensure your starting point is not influenced by your last meal.

Can I have black tea during the test?

No. Caffeine and tea can stimulate the liver to release sugar, which will ruin the test results.

What if my urine is positive but blood is normal?

This might indicate a "Low Renal Threshold," which is usually a benign condition but needs a doctor's review.

Does age affect these ranges?

Standard ranges are used, but your doctor will interpret them based on your age and health history.

Is the test result confidential?

Absolutely. At Dr. Patho, your metabolic profile is protected by strict privacy protocols.

Test Description

Glucose OGTT 75 gm / Oral Glucose Tolerance Test - 6 samples Examination Overview The 75-gram Oral Glucose Tolerance Test (OGTT) with 6 samples is a...

Test Code

O02

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