Which Korotkoff sound is characterized by soft tapping?

The sound characterized by soft tapping during a blood pressure measurement is the 2nd Korotkoff sound. This sound occurs after the first sound (which is a sharp thud) and signifies the beginning of the transition from laminar to turbulent blood flow in the arteries as the pressure in the cuff is released.

In the context of blood pressure readings, the Korotkoff sounds are critical for determining both systolic and diastolic pressures. The first Korotkoff sound marks the systolic pressure, while the sounds that follow give insight into diastolic pressure. The second sound is softer and more tapping compared to the first.

The third sound is more abrupt and represents further changes in the blood flow dynamics as the pressure continues to drop. The fourth sound is characterized by a softer, muffled quality, indicating a further decrease in blood pressure. The fifth Korotkoff sound represents the disappearance of all sounds and indicates diastolic pressure in adults.

Understanding the characteristics of these sounds is vital for accurate blood pressure assessment and interpretation. Thus, the 2nd Korotkoff sound stands out for its distinctively soft tapping quality.