Final answer:
In this situation, the nurse needs to meet the needs of both the client and the group when the client announces their departure from a group session.
Step-by-step explanation:
When a client suddenly gets up and announces that they are leaving a group session, the nurse needs to initially meet the needs of both the client and the group. The nurse should approach the client calmly and privately to understand their reasons for leaving and offer support. This can involve acknowledging their feelings, validating their perspective, and exploring alternative options such as taking a break or addressing any concerns they may have. Additionally, the nurse should address the needs of the group by providing reassurance, facilitating a discussion about the feelings and thoughts that may arise from the client's departure, and helping the group to refocus on the session's objectives.