Test 4

Question 1

The umbilical chord is given support and prevented from folding and kinking by:

Answer 1

Wharton’s jelly

Question 2

At 7 weeks gestational age the yolk sac is located in the:

Answer 2

Chorionic cavity

Question 3

In what structure does the choroid plexus appear?

Answer 3

Lateral ventricle

Question 4

Fetal gut imaged herniated into the umbilical cord is:

Answer 4

normal until the 12th week

Question 5

Transfundal pressure is used to evaluate…

Answer 5

Incompetent cervix

Question 6

Which scan plane is the best for assessing the presence of frontal bossing?

Answer 6

Sagittal scan plane of the face

Question 7

What is the term used for eyes that are set too far apart?

Answer 7

Hypertelorism

Question 8

Which structures do you need to see at the thalamic view?

Answer 8

Falx cerebri, fourth ventricle, and cavum septum pellucidum

Question 9

The most accurate method to date a pregnancy is:

Answer 9

CRL between 7-9 weeks gestation

Question 10

Ossification of the cranium begins around _____ weeks gestation

Answer 10

11

Question 11

Measurement for cisterna magna:

Answer 11

3 - 8 mm

Question 12

Measurement for lateral ventricles:

Answer 12

10 mm

Question 13

Measurement for nuchal fold:

Answer 13

5 mm

Question 14

Measurement for cervix:

Answer 14

> 3 cm

Question 15

At what week gestation should the amnion and chorion be fused?

Answer 15

14-16 wks

Question 16

The posterior ossification centers of the spine are widest at which area?

Answer 16

Cervical spine

Question 17

When is organogenesis?

Answer 17

6 - 10 wks gestation

Question 18

What is the most accurate method of measuring a cervical length?

Answer 18

Transvaginal

Question 19

Where is the sample being taken from for a chorionic villus sampling?

Answer 19

Placenta

Question 20

When blood is taken from the umbilical cord in a percutaneous umbilical blood sample, what section of the cord does the doctor insert the needle?

Answer 20

1 cm from the placental insertion

Question 21

written

Amniocentesis are performed safely from ____ weeks to term.

Answer 21

15

Question 22

How do you calculate probable due date from LMP?

Answer 22

??

Question 23

You are working New Year’s Day and get an order for a 1st trimester ultrasound from the ER. The patient is unclear of her LMP because her cycles are irregular. You find an IUP with a fetal pole that measures 10 weeks. What was er conception date and what is her probable due date?

Answer 23

Conception: 11/6/23

Due date: 7/29/24

Question 24

True/False:

The cord inserts into the fetal abdomen just superior to the stomach

Answer 24

False

Question 25

True/False

The placental thickness is equal in centimeters to the number of weeks gestation

Answer 25

False

Question 26

True/False:

A cervical cerclage suture may be applied to the cervix to treat an incompetent cervix until 32 weeks gestation.

Answer 26

False

Question 27

True/False:

The fetal surface of the placental is termed the basal plate

Answer 27

False

Question 28

Written

The gestational sac grows _____ a day in early gestation

Answer 28

1 mm

Question 29

List two reasons for premature maturation of the placenta:

Answer 29

• Twins
• Smoking during pregnancy

Question 30

written

Other than the length, describe two other things that you need to evaluate when imaging a fetal femur:

Answer 30

• echogenicity (needs to have the same brightness throughout with no patchy shadowing)
• Texture (should be a smooth surface, not rippled or rough)