External bladder--amniotic fluid shunt for fetal urinary tract obstruction

Area of Science:

• Perinatology
• Fetal Surgery
• Urology

Background:

• Congenital urethral stenosis can lead to severe fetal urinary tract obstruction.
• This obstruction can cause bilateral hydronephrosis, hydroureters, megacystis, and oligohydramnios.
• Oligohydramnios poses significant risks to fetal lung development and survival.

Observation:

• A male fetus at 29 weeks' gestation presented with bilateral hydronephrosis, hydroureters, megacystis, and oligohydramnios.
• The condition was secondary to urethral stenosis.
• Ultrasound was used for diagnosis and monitoring.

Findings:

• An in utero intervention involved placing an external bladder-amniotic fluid shunt.
• The shunt utilized two catheters: one in the fetal bladder and one in the amniotic sac.
• This procedure achieved decompression of the obstructed urinary tract and expansion of amniotic fluid.

Implications:

• In utero decompression via bladder-amniotic fluid shunt is a viable treatment for fetal urinary tract obstruction.
• This intervention can lead to favorable outcomes, including successful delivery and infant health.
• Fetal surgical interventions can significantly improve prognoses for congenital urinary anomalies.