The physiologic mode of adaptation is associated with the way people, as individuals,interact as physical beings with the environment. Behaviour in this mode is the expression of the physiologic activities of all the cells, tissues, organs, and systems of the human body. The underlying need for the physiologicmode is physiologic integrity (Roy, 2009). Intensive
care serves the most acutely ill of hospital patients or those with critical illness. Critically ill patients experiencemultiple, complexmedical problems that involve oxygenation, nutrition, elimination, activity and rest, and protection. Each of these physiologic needs involves integrated processes. They also present with problems in physiologic adaptation including
neurologic and endocrine function, the senses, fluid, electrolyte and acid-base imbalance. The ultimate outcome for an admission to ICU can be healing, survival, disability, or death.