Who are the contemporary nursing theorists and what were their contributions?
• Myra Levine described four conservation principles for nursing, specifically the conservation of energy, structural integrity, personal integrity, and social stability. She stated that nursing is needed when a person is unable to handle health problems. • Dorothea Orem developed the Self-Care Deficit Theory of Nursing, in which she purports that people need nursing care when they have a “self-care deficit,” or cannot care for themselves. • Sister Callista Roy used general systems theory and adaptation theory to produce the Roy Adaptation Model, in which the person is a biopsychosocial being constantly interacting with the environment. Nursing is needed to help the person adapt to stimuli.