Aim: Urinary flow after urethroplasty is of paramount importance. The aim of this study is
to evaluate the progression of uroflowmetry (UF) parameters after different distal and
proximal hypospadias repair techniques.
Methods: In this cohort study, cases that underwent primary hypospadias repair at our
institution between March 2010 and December 2018 were included when uncomplicated,
asymptomatic and toilet-trained. UF findings and post void residual were described after
each specific technique.
Results: In all, 88 patients were eligible. Time to last UF ranged from 35 to 138 months
postoperatively. Significant increase started 36 months after distal tubularized incised
plate urethroplasty (TIP) and afterwards than Mathieu technique. While was noticed 24
and 36 months after Onlay technique and proximal TIP, respectively; however, TIP
showed steady significant increase atall time intervals. Duckett repair exhibited insignificant
change in maximum flow rate (Qmax) values, buccal mucosal graft (BMG) and
inner preputial graft (IPG), significant increase in the Qmax values after 6 and 24
months, respectively, then remained steady high. Transposed preputial flap (TPF) showed
significant increase at 6–12 months only, then remained steady lower than the other two
techniques. Obstructed flow was 37% after distal TIP, 30% after Mathieu, 25% after
proximal TIP, 66.7% after Duckett repair, and 33.3% after TPF. There were no obstructed
cases after BMG and IPG.