Objective To explore the effect of PIVH on the voiding patterns of premature infants.Methods Eight-hourly observations were performed on the voiding patterns of 31 premature infants with the gestational ages ranging from 32 to 36 weeks.Of these,16 infants were without PIVH[gestation(34.2±1.1)weeks;post-birth(11±2)days]and 15 patients had PIVH[gestation(34.1±1.1)weeks;post-birth(11±1)days].The voiding times,the voiding volume,the residual,the conscious level during voidings and any interruptions at voidings were recorded and analysed.Results There are significant differences between the group with PIVH and the group without PIVH in the residual volumes[(2.4±0.8)ml vs.(2.0±0.7)ml]and the percentage of patients with conscious voiding[(35±6)％ vs.(44±8)％](P＜0.05).There was no significant difference in the voiding times[(7.4±1.0)vs.(7.2±1.0),voiding volume(15.6±5.7)ml vs.(16.5±6.0)ml]and the percentage of interruption voiding(47％ vs.44％).Conclusions There is a difference in voiding patterns between infants with PIVH and normal infants.