The purpose of critical reviews of literature is to provide an objective and comprehensive analysis of the writing. (Cronin, 2008). By using a number of different sources a researcher can access a range of current data that can be used for a variety of purposes (Aveyard 2010, Cronin et al 2008). The data can, for instance, be used to advise on up to date practice or help formulate a further research question. One key feature is that the analysis must be unbiased and consider both the strengths and weaknesses of the writings in order to formulate a complete picture. Literature reviews should be clear and written in a flowing style to provide for easy reading. This is characterised by being unbiased and being free from jargon whilst using any relevant technical terminology correctly and appropriately (Colling, (2003) cited in Cronin et al 2008). Research is ‘ the attempt to derive generalisable new knowledge by aggressing clearly-defined questions with a systematic and rigorous method’ (Department of Health, 2001, section 1.7). However, nursing research involves a systematic application of scientific methods to the study of phenomena interest within the nursing profession (Fain,1999). Evidence based research is increasingly becoming much more important within the medical fields. Research critique is a careful critical appraisal of the study’s strength and limitations focusing on whether the findings are accurate, believable and clinically meaningful (Polit and Beck, 2008). Burns and Grove (2007) assert that if findings cannot be trusted, it makes little sense to incorporate them into nursing practice (Timmins F, 2005).