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  • Title: Effect of glycerol on furosemide-caused EP decrease in guinea pig neonates.
    Author: Ohmura M, Raphael Y, Kanoh N, Yagi N, Makimoto K.
    Journal: Acta Otolaryngol; 1985; 99(1-2):21-4. PubMed ID: 3976392.
    Abstract:
    Furosemide, a loop diuretic, reduces the endocochlear potential in guinea pigs. In our previous experiment using adult guinea pigs, glycerol was thought to open the blood-cochlea barrier and to help furosemide to reach its site of action in the stria vascularis. The present study was designed to determine whether or not the same potentiation by glycerol occurs in neonate guinea pigs. In one group, furosemide (10-30 mg/kg) was administered, while in another group, 50 v/v% glycerol (1 ml/kg) was administered 15 minutes prior to the injection of furosemide. Furosemide reduced the EP significantly more in neonates than in adults. This effect was not potentiated in the glycerol-pretreated group. From these findings, it seemed conceivable that the neonate blood-cochlea barrier still remains immature in some functions.
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