Understanding posterior urethral valves

Definition

Posterior urethral valves (PUV) are congenital obstructing membrane or leaflets that are located within the posterior urethra associated with significant obstruction of the male bladder, restricting normal bladder emptying.

Facts & Figures

1/4000-1/8000

occurs in pregnancies.

  • Classically lead to severe bilateral hydroureteronephrosis, dilated bladder, and dilated posterior urethra.
  • The child with PUV may be diagnosed with bilateral hydronephrosis antenatally, in infancy with recurrent urinary tract infections, and in childhood with a history of incontinence.
  • One-third to one-half of posterior urethral valve (PUV) cases are identified by prenatal ultrasonography.

Poor prognostic criteria of antenatal detected PUV

The prognosis of PUV is variable depending on the degree of severity of the obstruction.

The worst prognostic criteria are:

  • Severe bilateral hydronephrosis with oligohydramnios resultant pulmonary hypoplasia.
  • Findings consistent with renal dysplasia.

Approximately one-third of patients born with PUV progress to end-stage renal disease.

Obstructive uropathies | 3. Mastering the treatment of obstructive uropathy
29 / 35
29 / 35