OB final Flashcards Preview

OB Ultrasound > OB final > Flashcards

Flashcards in OB final Deck (23):
1

The most accurate sonographic method of establishing gestational age is

Crown rump length measurement

2

The trophoblasts of the blastocyst become the

chorion

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

A. partial mole

4

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

Right atrium, left atrium

5

Where is the yolk sac located

between the amnion an chorion

6

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

6

7

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

C. AC

8

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

A. CI

9

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

10 mm (1cm)

10

The cisterna magna should not exceed ______cm in AP dimension

1cm (10mm)

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

D umbilical cord insertion

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

A. cerebellum

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

B. chorion

14

The yolk sac visually sonographically is the

D. secondary yolk sac

15

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

Missed

16

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

rhombencephalon

17

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

a. partial mole

18

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

C. pseudocyesis

19

The vessel normally found in the umbilical cord are

two arteries and one vein

20

The optimal period to examine fetal cardiac anatomy is

18-24 weeks

21

Chorioamniotic separtion is normal until _________ menstrual weeks

16

22

The functional unit of the placenta is the

cotyledon

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

B. prognosis should be given to allow for planning