Replenishing fluids Fluid substitution or fluid revival is the medical practice of replenishing body fluid lost through sweating, bleeding, fluid shifts or other pathologic procedures. Fluids can be supplanted with oral rehydration therapy (drinking), intravenous therapy, rectally, for example, with a Murphy drip, or by hypodermoclysis, the immediate injection of fluid into the subcutaneous tissue. Fluids regulated by the oral and hypodermic courses are consumed more gradually than those given intravenously. Oral rehydration therapy (ORT) is a straightforward treatment for lack of hydration related with diarrhea, especially gastroenteritis/gastroenteropathy, for example, that brought about by cholera or rotavirus. ORT comprises of a solution of salts and sugars which is taken by mouth. For most mellow to dissolve hydration in children, the best treatment in a emergency department is ORT over intravenous substitution of fluid. It is used globally, however is most imperative in the present scenario, where it spares a large number of children a year from death because of diarrhea—the second driving reason for death in children under five.