Abstract
Objective To investigate the effects of gender on the newborn's voiding patterns. Methods One hundred and two healthy, single birth newborns[54 cases were preterm(26 male, 28 female) and 48 cases were full term(30 male, 18 female)] without low urinary tract pathological diseases, hospitalized in NICU from Mar.2010 to Mar.2011 were recruited in this study.Twelve hours(9∶00 Am-9∶00 Pm) observation of free voiding was performed.The voiding interval time(VIT), bladder emptying rate(BER), voiding volumes(VV), post-void residual volumes(PRV), bladder capacity(BC), voiding times, state of consciousness at voiding and the number of defecate simultaneously at voiding(DSV) as well as fluid intake were recorded and analyzed, retrospectively. Results The total times of voiding and DSV of the preterm neonates were 318 and 40 times, respectively.VIT and BC between male and female preterm newborns had no statistical significance.The mean PRV of the male was larger[(1.9±0.9) mL vs (0.9±0.8) mL] and the BER was lower(8.3% vs 44.1%) than those of the female newborns(all P 0.05). Conclusion Compared with female, male newborns are more likely to have post-void residual volumes. Key words: Gender; Voiding pattern; Newborn
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