1. Preparation: Patients are usually instructed to fast for at least 8 hours before the test. Nurses must ensure the patient understands the fasting requirements to avoid inaccurate results. 2. Baseline Blood Glucose Measurement: A baseline blood sample is taken to measure fasting blood glucose levels. 3. Glucose Ingestion: The patient drinks a glucose solution containing a specific amount of glucose, usually 75 grams for adults. 4. Post-Ingestion Monitoring: Blood samples are taken at various intervals, commonly at 30 minutes, 1 hour, and 2 hours post-ingestion, to measure blood glucose levels.
