Glucose Estimation Extended 5 Hours Test
Short Name: Glucose Extended 5 Hrs Test
Also known as: Extended Glucose Tolerance Test, 5-Hour Glucose Challenge Test
Glucose Estimation Extended 5 Hours Test test available at DNA Labs India for ₹1,369. Uses Hexokinase Method, Strip Test on Plasma and Urine samples. Results in Reports are typically available within 24 hours and can be accessed online, via email, or WhatsApp.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Ramarao Paidisetty
Consultant Biochemist · Reg: 21504
Last reviewed: September 7, 2026
Overview
The purpose of the Glucose Estimation Extended 5 Hours Test is to evaluate the body's ability to regulate blood glucose over an extended period. It aids in diagnosing diabetes, hypoglycemia, and other metabolic disorders by measuring glucose response to a carbohydrate load. This test helps in differentiating between various conditions and guiding appropriate treatment plans.
- Test Code
- 672
- Price
- ₹1,369
- Sample Type
- Plasma and Urine
- Result Time
- Reports are typically available within 24 hours and can be accessed online, via email, or WhatsApp.
- Fasting Required
- Yes (8 hours)
- Method
- Hexokinase Method, Strip Test
Sample Collection
Overnight fasting for at least 8 hours is mandatory. Avoid eating, drinking (except water), and smoking after midnight. Inform your doctor about any medications you are taking.
Method: Venipuncture for blood, clean catch for urine
Laboratory Analysis
A glucose solution will be administered orally over 5 minutes. Blood and urine samples will be collected at specified time intervals. The process may take up to 5 hours.
Report Delivery
Resume normal activities and diet. Monitor for symptoms like dizziness or nausea, which are rare. Results will be available within 24 hours.
Timeline: Reports are typically available within 24 hours and can be accessed online, via email, or WhatsApp.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of the Glucose Estimation Extended 5 Hours Test is to evaluate the body's ability to regulate blood glucose over an extended period. It aids in diagnosing diabetes, hypoglycemia, and other metabolic disorders by measuring glucose response to a carbohydrate load. This test helps in differentiating between various conditions and guiding appropriate treatment plans.
How to Prepare
- Fast overnight for 8-12 hours before the test.
- Dissolve 82.5g glucose monohydrate in 300mL water for adults (dose for children based on weight).
- Administer the glucose solution orally over 5 minutes.
- Collect blood and urine samples at baseline (0 hr) and at 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 4.0, and 5.0 hours.
- Label all tubes and vials with time drawn and patient details.
Doctor's Notes
Reviewed by Dr Ramarao Paidisetty — MBBS, MD (Biochemistry) · Reg. No. 21504
"This extended glucose test is crucial for diagnosing diabetes and hypoglycemia, especially in borderline cases. It helps in assessing glucose metabolism over a 5-hour period, providing insights into insulin response and potential disorders."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Insufficient sample volume
- Incorrect labeling or missing information
- Non-fasting sample
- Hemolyzed or clotted blood sample
- Contaminated urine sample
Understanding Your Results
Fasting glucose <100 mg/dL and 2-hour glucose <140 mg/dL with normal response over 5 hours.
2-hour glucose between 140-199 mg/dL, indicating prediabetes.
Fasting glucose ≥126 mg/dL or 2-hour glucose ≥200 mg/dL on repeated testing.
Glucose levels drop below 70 mg/dL after 2-5 hours, causing symptoms.
Prolonged elevated glucose levels beyond 2 hours, suggesting metabolic issues.
Consult a doctor if you experience symptoms like excessive thirst, frequent urination, fatigue, or if test results show abnormal glucose levels. Early diagnosis and management are crucial for preventing complications.
Limitations
- ⚠Not suitable for patients with severe diabetes on insulin therapy
- ⚠Requires multiple blood draws, which may cause discomfort
- ⚠Results can be affected by recent carbohydrate intake
- ⚠Not recommended during acute illness or hospitalization
- ⚠May not detect all forms of glucose intolerance
Risks & Considerations
- ●Mild pain or bruising at the blood draw site
- ●Rare allergic reaction to glucose solution
- ●Nausea or dizziness from glucose ingestion
- ●Slight risk of infection at puncture site
- ●Fatigue from prolonged test duration
Interfering Factors
- ●Medications affecting glucose levels (e.g., steroids, diuretics)
- ●Acute illness or stress
- ●Dietary irregularities before the test
- ●Physical inactivity or excessive exercise
- ●Alcohol consumption
Compare With Similar Tests
| Test | Glucose Estimation Extended 5 Hours Test | Standard OGTT (2-hour) | Fasting Glucose Test | HbA1c Test | Random Glucose Test |
|---|---|---|---|---|---|
| Comparison | Glucose Estimation Extended 5 Hours Test |
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