Class 22: Amnio, CVS, BPP Flashcards
5 risk factors to invasive procedures for OB?
- spontaneous Ab
- fetal damage
- leaking amniotic fluid
- vaginal bleeding
- infection or injury to baby
rank the following from least risky to most risky: CVS, AMNIO, PUBS
AMNIO (LEAST), CVS, PUBS
3 types of invasive OB procedures
- amniocentesis
- chorionic villi sampling
- percutaneous umbilical sampling (PUBS)/ cordocentesis
most common indication for amniocentesis?
advanced maternal age (>35 yo)
which invasive procedure is done to check lung maturity?
amniocentesis
which invasive procedure is done to check rhizoimmunization?
amniocentesis
which invasive procedure is done to check for NTD?
amniocentesis
AFP is tested at ___ weeks
20 weeks
which weeks of gestation is amniocentesis performed?
between 14-20 weeks
2 factors that indicate amniocentesis later in pregnancy
- assess L-S ratio
- check severity of erythroblastosis
wait time for results for amniocentesis?
7 days to 3 weeks
4 areas to avoid when performing amniocentesis
- placenta
- fetus
- umbilical cord
- lateral side of uterus
what is chorionic villi sampling?
taking living cells from trophoblastic tissue
which trimester is CVS done in?
1st tri
which weeks is CVS done in?
8-12 weeks
an advantage of CVS is that it is a no needle approach. T/F?
true
the biophysical profile is a routine OB exam. T/F?
false
what is the APGAR score?
the 1st test for newborns to evaluate physical conidition
what does APGAR stand for?
Activity
Pulse
Grimace
Appearance
Respiration
5 parameters for BPP
- nonstress test
- fetal breathing movements
- fetal body movements
- fetal tone
- amniotic fluid volume
which BPP parameter isn’t performed by the sonographer?
NST
3 indications of a normal NST?
- 2 FHR accelerations of 15+ BPM
- accelerations lasting at least 15 seconds
- fetal movement over 20 min
what indicates normal fetal breathing movement? (score of 2)
1 episode of breathing of 30+ seconds in 30 minutes
what indicates normal fetal body movement (score of 2)
3 episodes of fetal movement in 30 minutes
fetal body movement correlates to __ __
heart rate
what is fetal tone?
seeing extension & flexion of extremities & spine
what indicates normal fetal tone?
1 episode of extension & flexion within 30 minutes
normal amniotic fluid volume
5-24 cm