Which techniques are not used by the nurse to vibrate the lung after percussion?

During exhalation tense the wrist muscles and vibrate the hands moving them down, stopping when the client exhales
Do not encourage coughing as this disrupts the vibrating technique and the nurse will have to restart

B) during exhalation tense all the hand and arm muscles and use the heal of the hand to vibrate chest D) Encourage coughing to expectorate excretions into a container