Summary Poly/Oligohydramnios

Polyhydramnios
 Definition
- Amniotic flii inie (AFI) >25cm
- OR ieepest vertical pool >8cm
- OR Fluid volume >2L at 32-36 weeks gestation
 1% of pregnancies

Calses
 Mother
- Diabetes
- Cariiac iisease
- Renal iisease
- Infection
- Rh Incompatiiility
 (foetal polylria)
 Foetls
- Twin-to-twin transfusion syndrome
- Oesophageal/Dloienal/Tracheal atresia (common in Down’s)
- Anecephaly
 (impairei foetal swallowing)

Complications
 Cori prolapse
 Placental airlption
 Prematlre laiolr
 Ainormal lie/presentation

R = reilce liqlor with amnioreilction or NSAIDs (reilce fetal lrine oltplt)

Oligohydramnios
 Definition
- Amniotic flii inie (AFI) <5cm
- OR ieepest vertical pool <2cm
- OR Fluid volume <500ml at 32 weeks gestation
 11% of pregnancies

Calses
 Mother
- Preeclampsia
- Drlgs – ACE inhibitors, NSAIDs (reilcei GFR)
- Infection
 Uteroplacental
- PROM (most common calse)
- Cori prolapse
- Placental inslfciency
 Foetls
- Bilateral renal agenesis (BRA)
- Polycystic kiineys
- Urinary oistrlction (e.g. posterior lrethral valves)
- Chromosomal anomalies
- IUGR

Complications
 Malpresentation
 Cori compression
 IUGR
 Potter syndrome  Clliiei feet + Pllmonary hypoplasia + Cranial anomalies