8A) Antenatal Care: Polyhydramnios Flashcards

1
Q

Incidence of polyhydramnios

A

1%

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2
Q

Classification of polyhydramnios

A

Mild: AFI 25-30cm
Moderate: AFI 30-35cm
Severe: AFI >35cm

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3
Q

DVP which is classed as polyhydramnios?

A

> 8cm

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4
Q

What proportion of polhydramnios cases are unexplained?

A

50-60%

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5
Q

When does amniotic fluid volume reach its peak?

A

33-38 weeks

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6
Q

Mean volume of amniotic fluid

A

600-800mL

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7
Q

What is the increase in perinatal morbidity and mortality with polyhydramnios?

A

2-5 x increased

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8
Q

How to investigate polyhydramnios?

A

USS for fetal weight, anomalies, movement and stomach/bladder.
Maternal investigations - GTT, TORCH, Red cell antibodies.

If remains unexplained & severe - refer to FMU and consider amniodrainage.
If remains unexplained & moderate/severe - serial growth scans, TVS for cervical length and no need for early IOL.

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9
Q

Risk of complications with amnioreduction

A

1.5%

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10
Q

Risk of major congenital anomaly with polyhydramnios

A

1% mild, 2% moderate, 11% severe (even with normal USS)

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11
Q

Risk of chromosomal abnormalities with polydramnios

A

If USS shows abnormalities - 10%.

If USS normal - 1%.

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12
Q

Risk of aneuploidy if persistent polyhydramnios

A

10-20%.

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