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- W2076754296 abstract "Circular strips of ductus arteriosus from lambs of gestational age between 90 and 144 days (term 147 days) were studied in vitro at low (8–16 torr (1 torr = 133.322 Pa)) and high (426–622 torr) [Formula: see text]. Potassium- and oxygen-induced contractions increased with the gestational age and attained a maximum at term. At low [Formula: see text], ibuprofen, a blocker of prostaglandin synthesis, produced a dose-dependent contraction of the ductus at all ages and enhanced the potassium-induced contraction of the immature ductus (90–124 days). Both effects were relatively greater in the 103- to 107-day gestational group. At that age, ibuprofen also potentiated the oxygen-induced contraction. These findings, while confirming that a prostaglandin is involved in ductus patency, indicate that the prostaglandin-relaxing mechanism becomes functional at an early stage of gestation and reaches maximal activity before term. The existence of an active, prostaglandin-mediated relaxation in the preterm ductus may account, in part, for the reduced responsiveness of the vessel to oxygen. It is confirmed that ibuprofen and other nonsteroidal antiinflammatory drugs are well suited for the management of the premature infant with patent ductus arteriosus." @default.
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- W2076754296 date "1979-08-01" @default.
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- W2076754296 title "Age-dependent changes in the response of the lamb ductus arteriosus to oxygen and ibuprofen" @default.
- W2076754296 doi "https://doi.org/10.1139/y79-126" @default.
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