Which Korotkoff sound represents the diastolic pressure for children?

• A. First
• B. Second
• C. Third
• D. Fourth

Answer: (D)

The main idea is how diastolic pressure is read in pediatric blood pressure measurement from Korotkoff sounds. When you deflate the cuff, you hear a sequence of sounds. The initial tapping marks systolic pressure. In children, the diastolic pressure is read at the point when the sounds become muffled and fade into silence, not at the moment they completely disappear. This muffling point is used because it provides a more reliable diastolic reading in kids. The later phases, where sounds fade away completely, are not used for diastolic pressure in children, and the very first tapping isn't diastolic either.