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Parry D, Oeppen RS, Gass H, Brennan PA. Br J Oral Maxillofac Surg 2017; 55: 995–998

Studies in the areas of aviation and the military have recognised the importance of adequate hydration and nutrition of personnel to ensure optimum performance. Deficits in water of as little as 2% of body weight have been shown to impede physical performance and levels greater than this can lead to headache, sleepiness, impatience and apathy. The authors quote a recent informal study of 80 operating theatre staff, which showed that 25% had left home without eating breakfast and 50% had not drunk anything since the previous evening. Staff involved in lengthy surgical lists or busy clinics which may run late risk becoming dehydrated, due to lack of opportunity to take breaks.

The amount of fluid needed per day varies according to gender, physical size, workload and the working environment. The authors suggest that regular breaks for re-hydration are essential and that an appropriate supply is available close to the work place as distance may discourage intake. Appropriate fluids include (ideally) water, cordials, canned drinks and tea or coffee. They conclude that 'adequate hydration and nutrition are essential if we are to provide patients with the best standard of care.'