Nurses play a variety of roles and functions. They provide care of patient before, during, and afteIt is one of the branch of the nursing process which is based on clinical judgment about an individual or family’s experiences to actual or potential health problems. It is done as per the basis of data obtained during the assessment. The actual diagnosis discovers the problem present at time of assessment, whereas a medical diagnosis identifies the disorder. r the treatment, and this is called as Perioperative Nursing. It is a unique nursing area wherein a nurse works as a team member for health care professionals.