Why you should read this article:

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To understand the need for periods of fasting before surgery

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To familiarise yourself with the implementation of shorter preoperative fasting times

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To learn about the importance of oral care and optimal communication for fasting patients

Many nurses will still be familiar with the instruction ‘nil by mouth from midnight’ traditionally given to patients preparing to undergo surgery. National and international guidelines now promote much shorter preoperative fasting times, encapsulated in the ‘2-4-6 rule’ – two hours for clear fluids, four hours for breast milk and six hours for solids. The latest evidence appears to show that these fasting times are in need of revision. Furthermore, there are inconsistencies in how guidelines are implemented. This article explores the guidelines and literature on preoperative fasting in adults and children to determine what the evidence is and what changes could be made to ensure consistent, high-quality patient care.