Oral rehydration therapy with the WHO formulation has saved millions of lives,1 but has yet to achieve universal acceptance because, although it performs the essential function of maintaining water and electrolyte balance during acute watery diarrhea, it does not reduce diarrhea volume. It has been proposed that a lower osmolar formula might achieve this aim by substituting rice for glucose or reducing the concentrations of sodium and glucose.2 To that end, the CHOICE Study Group compared the WHO standard oral rehydration solution (311 mmol/L) with a reduced osmolar solution (245 mmol/L) to try and reduce stool output, vomiting, and the need to return to intravenous therapy ("unscheduled").3 Based on results from this and 14 other trials,4 recommendations may be offered either to stay with the standard formula worldwide or to propose changes.
The results from this double-blind study at 5 centers with a total of 675 children were unambiguous: scarcely a whisper of difference between study and control groups in stool output and duration or vomiting; and a marginally significant difference in the need for unscheduled intravenous therapy in the first 24 hours (34/341 and 50/334, odds ratio 0.6, confidence interval [0.4, 1.0]). Since the criterion for unscheduled IV was intended to be clinical observation of dehydration or failure to become rehydrated on oral rehydration salt (the actual observations leading to the clinical decisions were
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C. Duggan, O. Fontaine, N. F. Pierce, R. I. Glass, D. Mahalanabis, N. H. Alam, M. K. Bhan, and M. Santosham Scientific Rationale for a Change in the Composition of Oral Rehydration Solution JAMA, June 2, 2004; 291(21): 2628 - 2631. [Full Text] [PDF] |
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