A. Explain the procedure to the child. Explaining procedures in an age-appropriate manner helps reduce anxiety and increases cooperation. A 3-year-old can understand simple instructions, so explaining what will happen can help them remain calm. B. Choose the cuff that says "Child" instead of "Infant." Blood pressure cuffs should be appropriately sized for accurate readings. A cuff that is too small can result in falsely high readings, while a cuff that is too large can produce falsely low readings. C. Use the diaphragm portion of the stethoscope to detect Korotkoff sounds. The bell of the stethoscope is best for detecting low-pitched sounds, including Korotkoff sounds. D. Obtain the reading before the child has a chance to settle down. A child who is upset, crying, or anxious may have an elevated blood pressure reading due to stress. It is best to allow the child to calm down before obtaining an accurate measurement.