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Evidence-based health care has become a priority in the National Health Service (NHS), with increased emphasis on clinical practices that are grounded in quality evidence rather than those that persist because of tradition. Turning and positioning of patients are well-accepted nursing activities. Appropriate positioning of the critically ill patient can dramatically improve gas exchange, resulting in a shorter stay in the critical care unit and an improved outcome. This study reviews the current published literature on the subject of positioning and gas exchange, with emphasis on oxygenation. Conclusions made from this study are that nurses need to be aware of how different positions can affect patients' oxygenation. Further research on exploring patients' experience of positioning within the critical care environment and nurses' understanding of positioning and oxygenation is needed.

Urinary catheters are associated with a number of complications, and nurses are ideally suited to minimize the associated risks by utilizing the available research in their practice. Urine tract infections caused by urine catheters are associated with increased mortality; however, urine catheter care is a nursing procedure, the importance of which is sometimes overlooked. This study reviews recommended guidelines on urine catheter care and current published literature on the subject. The aim of the study was to identify recommended practice and compare it with the current research and literature to conclude best practice. Conclusions made from this study are that existing guidelines correspond to the recommendations and findings in recent research and literature. However, more detailed guidelines and further research on how to prevent catheter-associated urine tract infections and other complications may be of benefit.