Chapter 22 Obsteric Sonography Review Flashcards
_____is also referred to as trisomy 13?
Patau syndrome
_____would be least likely associated with an elevation in MSAFP?
Turner syndrome
_____artifacts is caused by attenuation of the sound beam?
Posterior shadowing
_____artifact is produced when the sound beam is barely attenuated through a fluid or a fluid-containing structure?
Acoustic enhancement
The abdominal circumference should include:
- Fetal stomach
- Fetal thoracic spine
- The umbilical vein
_______describe the optimal instance to take the femur length measurement?
When the long axis of the femoral shaft is perpendicular to the sound beam
The protein that is produced by the yolk sac, fetal gastrointestinal tract, and the fetal liver is:
Alpha-fetoprotein
The physiologic ovarian cyst that develops after ovulation has occurred is the:
Corpus luteum cyst
The dilation of the renal collecting system secondary to the obstruction of normal urine flow defines:
Hydronephrosis
The triple screen typically includes an analysis of:
*hCG
*Alpha-fetoprotein
*Estriol
_______would not typically produce an elevation in hCG?
Anembryonic pregnancy
What is the fetal buttocks are closest to the cervix?
Frank breech
Biophysical profile scoring is conducted for how long:
For 30 minutes
Something that is idiopathic is said to be:
From an unknown cause
What form of fetal presentation is the most common?
Cephalic
The premature separation of the placenta from the uterine wall before the birth of the fetus describes:
Placental abruption
The anechoic space along the posterior aspect of the fetal neck is the:
Nuchal translucency
A myelomeningocele is associated with:
Spina bifida
______are produced by the placenta :
*hCG
*PAPP-A
*Inhibin A
______would be decreased in the presence of Edwards syndrome
- Estriol
- hCG
- Alpha-fetoprotein
What is observed during a biophysical profile:
*Fetal tone
*Thoracic movement
*Fetal breathing
Painless second-trimester vaginal bleeding is most often associated with:
Placenta previa