Final answer:
The correctly written nursing diagnosis is 'Acute pain related to left mastectomy,' as it specifies the problem and related factor, enabling nursing intervention planning.
Step-by-step explanation:
The appropriate nursing diagnosis among the provided options is "Acute pain related to left mastectomy." This diagnosis clearly identifies a problem (Acute pain), the related cause or contributing factor (left mastectomy), and implies a clear nursing intervention to address the pain related to surgical trauma. The other options lack specificity or imply a medical diagnosis rather than a nursing focus. Thus, the correctly written nursing diagnosis is specific, related to a patient's condition or treatment, and allows for nursing actions to be planned. In Barbara's case, identifying localized infection and fever could also lead to developing a nursing diagnosis such as Infection related to the central venous catheter site.