From the Guidelines
Polyhydramnios is defined as an amniotic fluid volume with a maximal vertical pocket (MVP) > 8 cm or an amniotic fluid index (AFI) > 25 cm or >95th percentile for gestational age. This definition is based on the most recent and highest quality study available, which emphasizes the importance of accurate assessment of amniotic fluid volume in fetal well-being 1. The assessment of amniotic fluid volume is a crucial component of both the modified biophysical profile (mBPP) and the biophysical profile (BPP), as it can help identify potential complications and guide clinical decision-making.
Key points to consider in the definition and management of polyhydramnios include:
- The maximal vertical pocket of amniotic fluid may be a more reliable indicator of polyhydramnios than the amniotic fluid index 1
- Polyhydramnios is associated with an increased risk of adverse fetal outcomes, including perinatal mortality and stillbirth 1
- The condition can be caused by various factors, including maternal conditions, fetal anomalies, and multiple pregnancies
- Management of polyhydramnios depends on the severity and underlying cause, and may include monitoring, therapeutic amniocentesis, and other interventions to reduce the risk of complications.
It is essential to note that polyhydramnios can have significant implications for maternal and fetal well-being, and accurate diagnosis and management are critical to preventing adverse outcomes 1.
From the Research
Definition of Polyhydramnios
- Polyhydramnios is defined as a pathological increase of amniotic fluid volume in pregnancy 2
- This condition is associated with increased perinatal morbidity and mortality 2
Key Characteristics
- Common causes of polyhydramnios include: + Gestational diabetes + Fetal anomalies with disturbed fetal swallowing of amniotic fluid + Fetal infections and other, rarer causes 2
- Diagnosis is typically obtained by ultrasound 2
- Prognosis depends on the cause and severity of polyhydramnios 2