A nurse is assisting with a bronchoscopy on a client who is…

A nurse is assisting with a bronchoscopy on a client who is being evaluated for persistent hemoptysis. Midway through the procedure, the client becomes restless and tachycardic, with an oxygen saturation of 86% despite receiving supplemental oxygen via nasal cannula. The client also begins coughing up small amounts of blood-tinged sputum. Which action should the nurse take first?