Final answer:
The psychiatric nurse should explain that the DSM-IV-TR diagnosis is for guiding medical treatment while the nursing diagnosis provides a framework for patient care interventions.
Step-by-step explanation:
The best response the psychiatric nurse can provide regarding the difference between a DSM-IV-TR diagnosis and a nursing diagnosis is: The DSM-IV-TR diagnosis influences the medical treatment; the nursing diagnosis offers a framework to identify interventions for problems a patient has or may experience. The DSM-IV-TR focuses on identifying mental disorders based on specific criteria to guide medical treatment, while the nursing diagnosis looks at a patient's response to health problems and directs patient care through interventions for those problems. Cultural considerations, which play a role in the conceptualization of distress and are acknowledged in the DSM-5, may also influence nursing diagnoses.