Pop Quiz #4 Flashcards
In late gestation, the hypoechoic contents of the fetal colon typically represent:
- normal muscle of the bowel
- meconium
- a distal obstruction, such as anal atresia
- an inflammatory reaction to bowel perforation
meconium
Percutaneous umbilical blood sampling (PUBS) is performed under US guidance for which of the following reasons:
- to transfuse a severely anemic fetus
- to provide nutrition for a severely growth restricted fetus
- in cases where determination of fetal-maternal blood incompatibility is necessary
- more than one of the above
more than one of the above
A specific clinical indication of premature rupture of membranes is:
- AFI < 0.5cm
- Passage of a large amt of watery fluid
- Small for gestational age
- decreased fetal movement
Passage of a large amt of watery fluid
The corpus luteum cyst of pregnancy is maintained throughout the 1st trimester by what process?
- production of LH by the anterior pituitary
- production of hCG by the trophoblastic cells
- growth amnion
- differentiation of the embryonic disk
production of hCG by the trophoblastic cells
A thin, echogenic circular structure is seen surrounding the embryo, separate from the secondary yolk sac. What does this represent?
- primary yolk sac
- chorionic membrane
- amniotic membrane
- decidual capsularis
amniotic membrane
Twin-twin transfusion syndrome is a serious complication for a twin gestation. Which of the following isn’t true about this condition?
- it occurs only w/ monozygotic twinning
- the donor twin may be “stuck” in an oligohydramniotic sac, while the recipient twin may exhibit signs of hydrops
- there is a vascular anastomosis in the shared placenta that shunts blood away from one fetus to the other
- both fetuses grow concordantly throughout the course of gestation
both fetuses grow concordantly throughout the course of gestation
Which of the following isn’t a sonoraphic indicator for an ectopic pregnancy implantation?
- slow rising serum hCG
- free fluid in the posterior cul-de-sac
- complex adnexal mass adjacent to the ovary
- poorly decidualized endometrium
slow rising serum hCG
W/ endovaginal scanning, a small soft tissue mass is seen anterior to the abdominal wall of an 11wk embryo, at the location of the umbilical cord insertion. What’s the probable explanation for this finding?
- early diagnosis of an omphalocele
- early diagnosis of a gastroschisis
- normal herniated bowel in the umbilical cord
- amniotic band syndrome causing evisceration
early diagnosis of a gastroschisis
An autosomal recessive disorder of the fetal kidneys that affects the kidneys bilaterally and makes them appear more echogenic is:
- multicystic dysplastic kidney disease
- polycystic kidney disease
- adult polycystic kidney disease
- congenital megaureter
polycystic kidney disease
All of the following are associated w/ a decreased serum hCG level except: partial mole embryonic demise incorrect dates missed abortion
partial mole
What's a typical Doppler waveform pattern for trophoblastic flow? high velocity, high resistance low velocity, high resistance high velocity, low resistance low velocity, low resistance
high velocity, low resistance
The “banana” and “lemon” signs may be associated findings of:
- the fetal abdomen
- fetal demise
- the fetal lungs
- fetal spina bifida
fetal spina bifida
A mean sac diameter is used to estimate gestational age under which of the following circumstances?
- When an accurate CRL can’t be measured
- Prior to visualization of the intracranial landmarks for BPD
- If the sonographic findings suggest an anembryonic pregnancy
- More than one of the above
More than one of the above
The highest oxygenated blood is found in what fetal heart chamber? Rt atrium Rt ventricle Lt atrium Lt ventricle
Rt atrium
The cisterna magna appears sonographically as an:
- Echogenic space superior to the cerebellum
- Echogenic space inferior to the cerebellum
- Anechoic space superior to the cerebellum
- Anechoic space inferior to the cerebellum
Anechoic space inferior to the cerebellum
