Abstract:

Objective To compare the application effect of silica gel external stent and double J tube in pediatric hydronephrosis surgery.

Methods 160 children with hydronephrosis were divided into control group and research group according to random number table method.80 cases in each group were treated with pyeloplasty.The control group was treated with silica gel external stent drainage and the research group was treated with double J tube drainage.The operation time，hospitalization time，renal artery flow velocity and resistance before and after operation，renal function，complications and hydronephrosis recovery were compared between the two groups.

Results The operation time and hospitalization time of the research group[（91.85±12.96）min，（7.95±1.14）d] were lesser than the control group[（102.22±15.93）min，（14.22±1.63）d]（P<0.05）.Before operation，there was no significant difference in the velocity，resistance and renal function between the two groups（P>0.05）.After the operation，the flow velocity and renal function of the affected renal interlobar artery and renal hilum artery increased，while the resistance，serum creatinine and urea nitrogen decreased in both groups.there was no statistical difference between the two groups（P>0.05）.The incidence of total complications in the study group（2.50%）was lower than that in the control group（11.25%，P<0.05）.There was no statistical difference between the research group and control group of truncation value of anterior and posterior diameter of renal pelvis was measured 6 months after operation[（1.66±0.27）vs（1.73±0.21）cm]，complete remission rate（36.25% vs 28.75%）（P<0.05）.

Conclusion Silicone external stent and double J tube can be fully drained in pediatric pyeloplasty，but double J tube drainage can effectively prevent the occurrence of related complications and improve safety.

Key words: hydronephrosis , silica gel outer support, double J tube