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Assessing dehydration and shock
Recommendations on laboratory investigations for assessing dehydration
Do not routinely perform blood biochemical testing.
Measure plasma sodium, potassium, urea, creatinine and glucose concentrations if:
• intravenous fluid therapy is required or
• there are symptoms and/or signs that suggest hypernatraemia.
Measure venous blood acid–base status and chloride concentration if shock is suspected or
confirmed.
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