[Evolution of acute transitory renal insufficiency in severe hypernatremic dehydration].

In this study the authors analysed the evolution of blood urea nitrogen in 14 infants during treatment of hypernatremic dehydration. BUN values decreased at a low rate comparing with usual standard limits: a) a correlation between initial BUN and natremia was observed, b) in 9 out of 14 infants there was a transient elevation of BUN, between 5 to 24 hours after the beginning of rehydration, and c) renal function was normal in 8 children who were reevaluated 3 to 28 months after the episode of dehydration.