Orlando's nursing process theory focuses on the reciprocal relationship between nurses and patients. The theory's key concepts are the patient, environment, health, and nursing. According to Orlando, the nurse's role is to identify and meet the patient's immediate needs for help by using the deliberative nursing process. This involves assessing the patient's presenting behavior, immediately reacting, engaging in reflective inquiry with the patient, and resolving issues to improve the patient's condition. The theory provides a framework for the nursing process and collaborative care between nurses and patients.