Nursing is an art as well as a science. Professional nurses are trained to deliver care artfully with compassion and respect for each client dignity and personhood. As a science, nursing is based upon a body of knowledge that is empirical, verifiable and is always changing with new discoveries and innovations. When nurses integrate the spirit of science and art of nursing into their practice, the quality of care provided to clients is at the highest level of excellence. Nurses practice in a wide diversity of areas of application with a multifarious scope of practice and level of prescriber authority in each. Nursing tend to be strongly influenced by health care needs of society which are under the ambient of economic, social and cultural variables. Changes in society , increased technology, new demographic patterns, consumerism, and health promotion all have led to a change in nursing .