Does pre-operative visiting reduce patient anxiety

As an anaesthetic practitioner make a clear distinction between pre-operative assesment and pre-operative visiting.
Main focus of essay is to link pre-op visiting with acting as patients advocate,reducing patient anxiety and the benefits to the patient. Incorporate both negative and positive aspects of pre-op visiting, commenting on research techniquies used by articles.Include other peoples perspectives and evidence based practice,provide a convincing argument,and include nursing and midwifery council(2004)code of conduct.please provide introduction and conclusion.
harvard style referencing