Objective: To evaluate the effects of desmopressin on pressure values inside the pelvis and ureter of the rat following acute obstruction. Materials and Methods: By means of a microsurgical technique, 24 male Wistar rats were submitted to ureteral obstruction; pressure inside the ureter was recorded using a cannula and a micrometric glass column. In the treatment group (14 animals) 6 m g/kg of desmopressin were administered 30 min before the beginning of the experiment. Results: Rats pretreated with desmopressin showed a statistically significant reduction in mean intraureteral pressure following acute obstruction (p = 0.05). Conclusions: In Wistar rats desmopressin demonstrated a powerful antidiuretic effect, reducing the intraureteral pressure. The experimental model is useful for a better understanding of physiopathology of renal colic and acute obstruction.

Keywords:
Desmopressin, Ureteral obstruction, Microsurgery
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1999
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