A client comes to the emergency department after an assault and is trembling and hyperventilating. What is the most appropriate initial nursing action?

The most appropriate initial nursing action is to remain with the client until the anxiety decreases. This action is essential in providing immediate support and reassurance to the client who is experiencing acute anxiety symptoms such as trembling and hyperventilation.

Being present with the client establishes a sense of safety and security, which is critical in moments of crisis. The presence of a calm nurse can help to stabilize the client’s emotional state, allowing for the anxiety levels to decrease gradually. This approach shows empathy and allows the healthcare provider to assess the client’s needs continuously while providing comfort during a distressing time.

Other potential actions, such as teaching relaxation techniques or encouraging discussion about the assault, may be beneficial but are more effective once the client's immediate anxiety has been addressed and stabilized. Placing the client alone in a quiet room might not provide the necessary support they need at that moment. Thus, remaining with the client is the most prudent choice to ensure they feel supported and secure.