Exam 2 - OB Flashcards
this test is assessing fetal movement + fetal HR accelerations (no contractions)
NST
what is normal fetal HR
110-160
fetal movement + fetal HR accelerations means what (with NST)?
adequate oxygenation to fetus
+
autonomic nervous system is fxning correctly
how long do we monitor for with NST?
20-40 mins
normal NST =
reactive
reactive NST =
normal
what are components of reactive NST? (for >32 weeks, and <32 weeks)
> 32 weeks: accelerations 15 (bpm) x 15 (secs) 2x in 20 mins
<32 weeks: accelerations 10(bpm) x 10 (secs)
No accelerations in 40 min window = what result?
if you get this result, what happens next?
nonreactive on NST (abnormal)
further assessment (CST)
If fetus doesn’t show variability during a NST, what can we do?
give snack or auditory vibration/stimulation to get some movement + to wake dat baby up
2 ways we can stimulate contractions during Contraction stress test (CST)
- nipple stimulation
2. oxytocin stimulation
negative CST =
normal
positive CST =
abnormal
what are the components of a negative CST?
No late decels in 10 min period w/3 contractions
what are the components of a positive CST?
late decels in 50% of contractions
tell us baby might not be able to handle labor
what could late decels be indicative of?
placental insufficiency
what is major risk of CST? what should we have handy in preparation for this?
preterm labor risk → give tocolytics if they have >5 contractions in 10 mins
L/S ratio is tested via what?
amniocentesis
what is L/S ratio testing? what is ratio that indicates this?
bonus: what is ratio for preggo pt with diabetes?
fetal lung maturity (2:1)
diabetes L/S: 2.5:1 or 3:1
what is variability?
variations in fetal HR - moderate is normal, expected ◡̈
accelerations are what? what do they tell us?
increase in HR - indicates good oxygenation
early decels indicate what?
head compression
type of HR variation:
gradual decrease in FHR; mirrors contraction
early decels
type of HR variation:
abrupt decrease in FHR; resembles a V on monitor; no relation to contractions
variable decels
variable decels indicate what?
cord compression