Final answer:
After hearing the last Korotkoff sound, which indicates diastolic blood pressure, clinicians should continue to listen for an additional 10-20 seconds to confirm that no further sounds occur and the diastolic pressure has been measured accurately.
Step-by-step explanation:
During the measurement of blood pressure, clinicians listen for the Korotkoff sounds using a stethoscope placed on the patient's antecubital region. The first Korotkoff sound signals the return of blood flow indicating systolic pressure.
The last Korotkoff sound indicates when the blood can flow freely through the brachial artery marking the diastolic pressure. After hearing the last Korotkoff sound it is recommended to listen for approximately 10-20 seconds more to ensure that no further sounds are heard confirming that diastolic pressure has been accurately measured and that there are no additional beats indicating a pressure gradient.