Oligohydramnios

Question 1

What is oligohydramnios?

Answer 1

A lower than normal amount of amniotic fluid in the uterus

Question 2

What are the causes of oligohydramnios?

Answer 2

Intrauterine growth restriction
Premature rupture of membranes
Fetal urinary system abnormalities
Post-term gestation
Pre-eclampsia

Question 3

What are the complications of oligohydramnios?

Answer 3

Congenital hip dysplasia
Clubbed feet
Facial deformity
Pulmonary hypoplasia

Question 4

What is Potter syndrome?

Answer 4

Pulmonary hypoplasia and bilateral renal agenesis

Question 5

How does Potter syndrome occur?

Answer 5

A renal formation abnormality can cause oligohydramnois which can lead to pulmonary hypoplasia

Question 6

What investigations are performed to diagnose oligohydramnios?

Answer 6

Amniotic fluid index < 5
Single deepest pocket < 2cm

Question 7

What is the management of oligohydramnios?

Answer 7

Mild cases - maternal rehydration to increase amniotic fluid volume
Amnioinfusion - infusion of saline into the amniotic cavity
Induction of labour or C section if fetus is in distress