Antepartum fetal surveillance

Question 1

normal result for NST

Answer 1

reactive: >/=2 accelerations that are >/=15 BPM above baseline and >15sec long within a 20 min period

non reactiv: <2 reactions or recurrent variable/late decels

Question 2

BPP normal
amniotic fluid volume
fetal breathing mvmt
fetal mvmt
fetal tone

Answer 2

8-10 points

abn 0-4 pts (oligo)

Question 3

NST function

Answer 3

monitors external fetal heart rate for 20-40min

Question 4

Contaction stress test fxn

Answer 4

external fetal heart rate monitor during spontaneous or induced (oxy, nipple stim) uterine contractions

Question 5

Cxn Stress test normal v. abn

Answer 5

normal - no late or recurrent variable decels

abn - late decels with >50% of contractions

Question 6

If a NST is noreactive, what two tests do you further evaluate with? What do you choose if there are contraindications to labor (placenta previa, prior myomectomy)?

Answer 6

BPP or CST. Do BPP if tehre are contraindications to labor

Question 7

How do you get a definitive karyotype diagnosis?

Answer 7

chorionic villus sampling (10-13wks)

amniocentesis (15-20wks)

Question 8

SCREEN for neural tube defects and anuploidy (15022 wks)

Answer 8

second tri quad screen

Question 9

> 10wks - test with high sensitivyt and sepcificity for aneuploidy

Answer 9

cell fee fetal DNA

Question 10

first trimester u/s measurement that is most accureate method of determining gestational size

Answer 10

crown-rump length