Final answer:
In a local emergency with major casualties, a directive and authoritative leadership style is most appropriate to guide the staff with clear instructions and quick decision-making.
Step-by-step explanation:
During a local emergency with an influx of major casualties and high levels of anxiety and disorganization among the staff, the most appropriate leadership style would be directive and authoritative. This leadership style pivots to clear, concise communication, providing specific instructions, close supervision, and quick decision-making to establish order and efficiency swiftly. The leader using this approach steps up in crisis situations to guide the team, direct operations, and delegate responsibilities effectively. It draws on the principles of clear decision making and stress management, akin to the medical training illustrated by the prompt emergency response of nurses and EMTs in corresponding scenarios, such as major incidents or disasters like the influenza pandemic.
The nurse leader should assume a role that ensures procedures are followed, resources are allocated appropriately, and everyone is aware of their assignments. This not only maximizes the use of the staff's skills but also provides a structured environment in which the staff can perform most efficiently under pressure.