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Urinary flow patterns in infants with distal hypospadias

L Henning Olsen1, Ingrid Grothe, Yazan F Rawashdeh

  • 1Paediatric Urology, Department of Urology, Aarhus University Hospital - Skejby, 8200 N. Aarhus, Denmark. h-olsen@dadlnet.dk

Journal of Pediatric Urology
|July 6, 2010
PubMed

Insights

Infants with hypospadias exhibit lower maximum urinary flow rates (Qmax) and reduced flow dyscoordination compared to healthy boys. This suggests potential urethral compliance issues may influence voiding patterns in hypospadias.

Area of Science:

  • Pediatric Urology
  • Medical Engineering
  • Infant Health

Background:

  • Hypospadias is a common congenital condition affecting the male urethra.
  • Understanding voiding dynamics in infants with hypospadias is crucial for surgical planning and management.
  • Preoperative assessment of urinary flow patterns can provide insights into urethral function.

Purpose of the Study:

  • To investigate and characterize preoperative urinary flow patterns in infants diagnosed with hypospadias.
  • To compare the uroflowmetry parameters of hypospadic infants with those of healthy infant controls.

Main Methods:

  • Utilized transit-time ultrasound flowmetry with a 14-mm probe around the penile base for continuous uroflow registration.
  • Compared 21 boys undergoing hypospadias surgery (median age 14.0 months) with 19 healthy controls (median age 12.0 months).

Main Results:

  • Hypospadic infants demonstrated a significantly lower median maximum flow rate (Qmax) (2.4 ml/s vs. 4.4 ml/s, P < 0.01).
  • Plateau-shaped flow curves were observed in 31% of hypospadic infants, absent in controls.
  • Dyscoordinated flow curves were less frequent in hypospadic infants (36% vs. 64%, P < 0.01).

Conclusions:

  • Infants with hypospadias exhibit distinct uroflowmetry characteristics, including lower Qmax and reduced flow dyscoordination.
  • Decreased urethral compliance is hypothesized as a contributing factor to reduced Qmax and may mitigate flow dyscoordination in hypospadias.
Abstract

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