Chapter 53 Fetal Growth Assessment Flashcards
Preterm is __ weeks
Before 37
Early term is _____ weeks
Between 37-39 weeks
Full term is ____ weeks
39-41
Later term is _____ weeks
Between 41-42 weeks
IUGR is most commonly defined as fetal weight below ____ % for given gestational age
10%
Mortality rate is increased ____ depending on severity of IUGR
6-10 fold
Most significant maternal factors with IUGR
- history of previous fetus with IUGR
- smoking
- hypertension
- uterine anomaly
- placental hemorrhage
- placental insufficiency
Difference between IUGR and SGA
IUGR is caused by pathological process
2 classifications of IUGR
Symmetric and asymmetric
More common form of IUGR
Asymmetric
Usually the result of a first trimester insult like chromosomal abnormality or infection.
Symmetric IUGR
IUGR that is also caused by severe maternal malnutrition, fetal alcohol syndrome, severe congenital anomaly. 20-30% of IUGR cases
Symmetric IUGR
Asymmetric IUGR usually results from ____
Placental insufficiency
Assures blood flow to the brain at the expense of the rest of the body
Asymmetric IUGR
Characterized by an appropriate BPD and HC but a disproportionately small AC
Asymmetric IUGR—head sparring
Last organ to be deprived of essential nutrients ____
Brain
The single most sensitive indicator of IUGR ____
AC
Five biophysical parameters included in a BPP
- NST
- Fetal Breathing Movement (FBM)
- Gross Body Movements (GBM)
- Fetal tone(FT)
- AFI
BPP has a _____ minute time limit
30
Normal BPP score
8-10
BPP score with no immediate significance
4-6
BPP score indicating immediate delivery or extending the test
0-2
The goal of the BPP is to find a way to predict and manage the fetus with _____
Hypoxia
Waveforms make sure that blood flow in the umbilical vessels of the fetus with IUGR is ____
Decreased
