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pre·re·nal -'rēn-əl adj occurring in the circulatory system before the kidney is reached <the usual \prerenal causes for transient renal insufficiency such as hypotonia and hypovolemia were excluded (Rudolf Pfab )(et al)>
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pre·re·nal (pre-reґnəl) 1. anterior to a kidney. 2. occurring before the kidney is reached, such as acute renal failure in which the kidney does not receive adequate blood flow. Cf. postrenal.Medical dictionary. 2011.