Which of the following actions helps ensure reliable glucose test results when fasting is recommended?

• A. Ensure the patient has fasted for the recommended period
• B. administer a glucose solution before testing
• C. Test immediately after a meal
• D. Ignore timing and proceed with testing anyway

Answer: (A)

Glucose results are most reliable when the sample is drawn after the patient has fasted for the recommended period. Fasting removes the influence of a recent meal, so the glucose level reflects baseline regulation rather than a post-meal spike. This makes the result easier to interpret against fasting reference ranges and reduces variability between tests.

If food has been eaten before testing, the glucose measured will be elevated due to postprandial rise, potentially masking an underlying issue or falsely suggesting hyperglycemia. Giving a glucose solution before testing would artificially raise the glucose level, not reflecting the animal’s usual state. Testing immediately after a meal captures post-meal glucose, not the fasting baseline, and ignoring timing leads to inconsistent, unreliable results.