Final answer:
The nurse supervisor should implement mandatory bedside reports to address the safety events.
Step-by-step explanation:
The priority action for the nurse supervisor in response to the serious safety events is to implement mandatory bedside report. A bedside report is conducted when the oncoming nurse and offgoing nurse exchange pertinent patient information at the bedside, ensuring accurate and complete handoff.
By implementing mandatory bedside reports, the nurse supervisor can ensure that all nurses are aware of the patients' conditions and treatments, including the use of IV insulin, and prevent similar incidents.
This action promotes effective communication and collaboration among the healthcare team, enhancing patient safety and reducing the risk of errors.