Validation of defining characteristics: retrospective design.

The American Association of Neuroscience Nurses (AANN) has accepted the concept of nursing diagnosis as one component of a general nursing framework which is designed to direct and evaluate the care of individuals with neuroscience dysfunction. Continuing development of nursing diagnosis as a conceptual basis for neuroscience practice is dependent upon several factors, one of which is research-based identification and validation of defining characteristics associated with nursing diagnoses commonly used in the care of patients with neurologic dysfunction. Defining characteristics are observable signs and symptoms present in the person with the problem. Identification and validation of defining characteristics are essential to the continued development and use of nursing diagnosis in nursing practice. Without clear, specific defining characteristics, neuroscience nurses are unable to effectively assess patients for the signs and symptoms necessary to formulate nursing diagnoses, monitor patient status or evaluate nursing interventions. One way to validate defining characteristics is the use of retrospective design.