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A 2-year-old girl has had 24 hours of vomiting and watery diarrhoea. She is alert and irritable, her mucous membranes are dry, her father thinks her eyes look sunken, and her capillary refill is two seconds. Undressed on the clinic scales she weighs 12.4 kg. The practice record shows a weight of 13.0 kg taken nine days ago at her immunisation visit, and her mother confirms she had been well until yesterday. Which one of the following gives the most accurate estimate of her fluid deficit?
Shared by Morniencommon

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