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  • Title: Effects of ibuprofen and indomethacin on urinary antidiuretic hormone excretion in preterm infants treated for patent ductus arteriosus.
    Author: Zanardo V, Vedovato S, Lago P, Piva D, Faggian D, Chiozza L.
    Journal: Fetal Diagn Ther; 2005; 20(6):534-9. PubMed ID: 16260891.
    Abstract:
    OBJECTIVE: To compare the effects of intravenous ibuprofen and indomethacin for treatment of patent ductus arteriosus (PDA) on urinary antidiuretic hormone (ADH) excretion, as a cause of oliguria. STUDY DESIGN: Forty-four respiratory distress syndrome prematures (<or=34 weeks' gestation) with PDA received either ibuprofen (n = 22) in an initial dose of 10 mg/kg followed by two doses of 5 mg/kg each after 24 and 48 h or three doses at 12-hour intervals of indomethacin (n = 24), 0.2 mg/kg, both infused continuously over a period of 15 min. Urinary ADH excretion, diuresis, serum creatinine, urinary sodium, fractional excretion of sodium, and urinary osmolality were measured before and after treatment. RESULTS: Indomethacin treatment caused a significant decrease in urinary ADH excretion (21.8 +/- 20.8 vs. 13.8 +/- 12.9 pg/ml; p < 0.05), along with a significant reduction in urinary sodium (92.1 +/- 36.1 vs. 64.8 +/- 35.6; p < 0.05), fractional excretion of sodium (68.5 +/- 37.1 vs. 45.6 +/- 37.1; p < 0.05), and urinary osmolality (276.2 +/- 103.9 vs. 226.4 +/- 60.3; p < 0.05). Ibuprofen treatment did not modify urinary ADH excretion and caused a statistically insignificant decrease in urinary sodium and in fractional excretion of sodium. CONCLUSIONS: Compared with ibuprofen, indomethacin caused a significant reduction in urinary ADH excretion and a significant decrease in urinary sodium and osmolality.
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