8 Posterior Urethral Valves. POSTERIOR URETHRAL VALVES ARE OBSTRUCTING MEMBRANES WITHIN THE LUMEN OF THE URETHRA, EXTENDING FROM THE VERUMONTANUM DISTALLY.OCCUR ONLY IN BOYS.COMMONEST CAUSE OF BLADDER OUTLET OBSTRUCTION AT UCH, IBADAN.
10 Posterior Urethral Valves: Epidemiology. INCIDENCE: 1/ 5000 – 8,000 male infants.1/1,250 by recent foetal Uss.GENETICS: debatable, but have been seen in siblings.
11 Posterior Urethral Valves: Clinical presentation. PRE-NATAL PRESENTATION:Distended, thick walled foetal bladder.Hydronephrosis.Oligohydramnios. Most of the amniotic fluid after the 16th/52 of gestation depend on the foetal urine. Oligohydramnios would suggest primary renal impairment or obstruction.
12 Posterior Urethral Valves: Clinical presentation. POST- NATAL DIAGNOSIS:TIME AND MODE OF PRESENTATION WOULD DEPEND ON THE SEVERITY OF THE CONDITION.RESPIRATORY DISTRESS.URAEMIA AND SEPSIS.ABDOMINAL DISTENTION.DIFFICULTY WITH MICTURITION.
14 Poterior Urethral Valves: Clinical presentation. Features that can be seen on VCUG.Dilated,thick walled, trabeculated bladderElongated and dilated prostatic urethra with narrow bladder neck.Folds of valves could be seen as filling defects from the area of the verumontanum.VUR, diverticula, pseudoresidual, etc.Valves unilateral reflux and renal dysplasia syndrome. (VURD)