Antepartum fetal evaluation Flashcards
How should you instruct patients to do fetal kick counts?
3 movements in 1 hour
When does fetal movement peak throughout the day?
9 pm - 1 am
True or false: Mild hypoglycemia increases fetal movement
True
What is the contraction requirement for a contraction Stress Test?
3 contractions in 10 minutes lasting 40 - 60 seconds
What is the definition of a negative CST?
No late deceleration present
What is the definition of a positive CST?
late deceleration present with > 50% of contractions
What is the definition of an equivocal CTS?
late deceleration present with < 50% of contractions
CSTs have a _____ false positive rate and _____ false negative rates.
High, low
A negative CST assures fetal well being for how long?
1 week following test
A reassuring and reactive NST assures fetal well being or how long?
1 week following test
A non reactive NST is associated with what perinatal mortality rate?
30 - 40/1000
What is the most common cause of a non reactive NST?
Fetal sleep cycle
When you increase NST frequency to twice weekly how much do you decrease the mortality rate in high risk populations?
6.1/1000 (once weekly) –> 1.9/1000 (twice weekly)
What are the components of a BPP?
NST, Fetal breathing, fetal movement, fetal tone, amniotic fluid volume
What is the management of a BPP of 6/10 in a term patient?
Delivery
