OB final

Question 1

The most accurate sonographic method of establishing gestational age is

Answer 1

Crown rump length measurement

Question 2

The trophoblasts of the blastocyst become the

Answer 2

chorion

Question 3

All of the following are associated with a decresed serum hCG except
a. partial mole
B. incorrect dates
C. embryonic demise
D. missed abortion

Answer 3

A. partial mole

Question 4

The foramen ovale permits blood to pass from the ________ to the ________

Answer 4

Right atrium, left atrium

Question 5

Where is the yolk sac located

Answer 5

between the amnion an chorion

Question 6

The nuchal fold should not exced ____________mm in a normal pregnancy, when measure prior to 20 weeeks

Answer 6

6

Question 7

Which of the following sonographic measurements is least accurate for detemining gestational age?
A. FL
B. CRL
C. AC
D. BPD
E HC

Answer 7

C. AC

Question 8

The ratio of BPD to OFD determines the 
A. CI cephalic indes
B. HC
C. AC 
D. EFW

Answer 8

A. CI

Question 9

The lateral ventricular atrial width is considered abnormal if it exceeds.

Answer 9

10 mm (1cm)

Question 10

The cisterna magna should not exceed ______cm in AP dimension

Answer 10

1cm (10mm)

Question 11

Which of the following is not routinely visualized at the proper level for measurement of the abdominal circumference
A. aorta
B. spine
C. stomach
D. umbilical cord insertion
E. portal sinus of the umbilical vein

Answer 11

D umbilical cord insertion

Question 12

Which of the following is not routinely imaged a the proper level for BPD measurement?
A. cerebellum
B. cavum septum pellucidum
C falx cerebri
D. thalamus

Answer 12

A. cerebellum

Question 13

The inner cell mass of the blastocyst develops into all of the following except
A. embryonic disk
B. chorion
C. amnion
D.yolk sac

Answer 13

B. chorion

Question 14

The yolk sac visually sonographically is the

Answer 14

D. secondary yolk sac

Question 15

An identifiable embryo without cardiac activity is referred to as a ______ abortion.

Answer 15

Missed

Question 16

The anechoic structure visualized sonographically in the posterior portion of the embryonic cranium transvaginal between 8-11 weeks

Answer 16

rhombencephalon

Question 17

The existence of a fetus with a hydatidiform mole is 
A. patial mole
B. gestational trophoblastic disease
C. triploidy
D. choriocarcinoma

Answer 17

a. partial mole

Question 18

hCG is elevated in all of the following conditions except
A. ectopic preg
B. normal intrauterine preg
C. pseudocyesis
D. hydatidaform mole

Answer 18

C. pseudocyesis

Question 19

The vessel normally found in the umbilical cord are

Answer 19

two arteries and one vein

Question 20

The optimal period to examine fetal cardiac anatomy is

Answer 20

18-24 weeks

Question 21

Chorioamniotic separtion is normal until _________ menstrual weeks

Answer 21

16

Question 22

The functional unit of the placenta is the

Answer 22

cotyledon

Question 23

All of the following are true for sonographers when interacting with obstetric patients except
A. maintain a steady flow of conversation
B. prognosis should be given to allow for planning
C. general descritions should be used
D. treat the patient with respect in any circumstance

Answer 23

B. prognosis should be given to allow for planning