In a glucose tolerance test (GTT), the 4th sample typically refers to a blood sample taken at the 2-hour mark after the patient has consumed a glucose solution. The test is used to assess how well the body processes glucose over time. Here's the general procedure for a 4-hour GTT: 1. **Fasting Sample**: Blood is drawn after fasting overnight. 2. **Glucose Consumption**: The patient drinks a glucose solution. 3. **1st Hour Sample**: Blood is drawn 1 hour after drinking the glucose solution. 4. **2nd Hour Sample**: Blood is drawn 2 hours after drinking the glucose solution. 5. **3rd Hour Sample**: Blood is drawn 3 hours after drinking the glucose solution (if a 4-hour test is conducted). The results of these samples help evaluate how effectively the body regulates blood sugar levels and diagnose conditions like diabetes or insulin resistance.

We provide blood tests in Noida, Gurgaon, Faridabad, Delhi, Indirapuram, Ghaziabad, , Greater Noida, and Greater Noida Extension(west).