2nd and 3rd Trimester Fetal Assessment Flashcards
the BPD should be obtained at the level of:
- 3rd ventricle
- CSP
- thalamus
how should you measure BPD
leading edge to leading edge (outer to inner)
what should not be included in the BPD measurement
scalp thickness
BPD is more accurate for dating before ___ weeks
20
what two head measurements are performed at the same level
BPD and HC
how should you measure the HC
around the edge of the skull
the abdominal circumference should be obtained at the level of the:
- portal vein
- stomach
- single rib on each side
do you include the skin thickness in the AC mmt
yes
what part of the femur is not included in an accurate femur length
epiphysis
what biometry mets are used to assess 2nd and 3rd trimester fetal growth
- BPD
- HC
- AC
- femur length
a ___ head has a CI of
dolichocephaly
a dolichocephalic head can be seen with what
- breech fetuses
- holoprosencephaly
- oligohydramnios
a ___ head has a CI of >.85
brachycephaly
what kind of head shape is seen with dolichocephaly
elongated head
what kind of head shape is seen with brachycephaly
round
at what mmt is a lateral ventricle considered abnormal
> 10mm
the cerebellum should grown how much per week
1mm per week and normally measures the same distance as number of weeks in gestational age
normal cisterna magna mmt
less than 10mm
what is a normal nuchal skin fold between 15-21 weeks
<6mm
what is the least accurate biometric measurement for dating
abdominal circumference
abdominal circumference is more useful for estimating ____
fetal weight
a normal umbilical cord should have ___ arteries and ___ veins
2 arteries
1 vein
