In 8 patients who underwent abdominal surgery for non-neoplastic reasons, we have evaluated some parameters of renal function (PRP, NaU, GFR and diuresis) plasma levels of PRA and ADH and urinary prostaglandins PGE2 and 6-keto-PGF1 alpha. In 4 patients we found that surgery per se was associated with enhancements of PRA, ADH and 6-keto-PGF1 alpha. In other 4 patients, Indomethacin, a specific inhibitor of prostaglandin synthesis was given and this was followed by impairment of natriuresis and RPF. These data confirm the central role of prostaglandins in the control of diuresis and natriuresis and suggest that use of drugs affecting prostaglandin synthesis should be avoided in patients who are undergoing surgery.
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