quiz 3 study guide

Question 1

Placenta accreta sonographic appearance shows ?

Answer 1

loss of retroplacental anechoic strip

Question 2

-Placenta increta sonographic appearance?

Answer 2

loss of retroplacental anechoic strip and blood vessel crosses from placenta enters into myometrial walls

Question 3

Placenta percreta, the placenta attaches ____?

Answer 3

attaches itself and grows through the uterus and potentially to the nearby organs(such as the bladder).

Question 4

Placenta percreta sonographic appearence ?

Answer 4

seen as loss of retroplacental anechoic strip and blood vessels traversing passing the uterus to nearby organs

Question 5

normal measurement of nuchal fold thickness is

Answer 5

6 (18-24 weeks)

5 (16- 18 weeks)

Question 6

normal measurement of nuchal translucency is

Answer 6

< 3mm

Question 7

dumbbell-shaped structure inferior and posterior to the cerebrum is ?

Answer 7

cerebellum

Question 8

BHCG can be detected 3 weeks after LMP or 7-10 days after ovulation?

Answer 8

true

Question 9

important measurements for the 1st and 2nd trimester are?

Answer 9

CRL, AC, FL, HC, BPD

Question 10

give 4 reasons for requiring ultrasound in 2nd or 3rd trimester?

Answer 10

GA
fetal anatomy
AFI
fetal position

Question 11

give 4 important indication for 2nd and 3rd trimester OB exam

Answer 11

determine fetal position
decide plane of view
determine focal zone
weight

Question 12

what structure if shown in fetal skull image make a head circumference or BPD measurements inaccurate?

Answer 12

eyes/orbits, asymmetrical cerebral hemispheres

Question 13

what structures in the fetal abdominal image make an abdominal circumference measurement inaccurate?

Answer 13

bladder, heart and kidneys should not be in view for AC measurement

Question 14

transcerebellar measurement more or less correspond to GA until ____ weeks?

Answer 14

25 weeks

Question 15

corpus luteal cyst of pregnancy can be seen up to ___

Answer 15

15 weeks

Question 16

what structures shouldn’t be seen in the fetal thorax?

Answer 16

No abdominal organs like liver, stomach or bowel should be seen in fetal chest/thorax

Question 17

cisterna magnum lies between ?

Answer 17

cerebellum and cranium

Question 18

lateral ventricles are identified by ___ weeks

Answer 18

16

Question 19

choroid plexus has a prominent _____ area within the lateral ventricle

Answer 19

echogenic

Question 20

fetal heart rate is ?

Answer 20

120-160 bpm

Question 21

fetal diaphragm can be visualized at 1/2 of fetuses by ____ weeks

Answer 21

20 weeks

Question 22

fetal stomach can be visualized by ____ weeks.

Answer 22

20 weeks

Question 23

fetal bladder can be visualized by____ weeks .

Answer 23

20 weeks

Question 24

fetal bowel can be visualized in ___ trimester.

Answer 24

3rd

Question 25

fetal kidney can be visualized by ___ weeks.

Answer 25

15-16 weeks

Question 26

fetal weight is based on?

Answer 26

bpd, HC, AC, FL

Question 27

accurate identification of female genitalia is by ___

Answer 27

20 weeks

Question 28

vertebrae can be well visualized by ____ weeks

Answer 28

16 weeks

Question 29

placenta is organized into lobules called ?

Answer 29

cotyledons

Question 30

placenta weights between

Answer 30

450-550 g

Question 31

thickness of placenta is

Answer 31

4-5.0 cm in thickness

Question 32

breech presentation of fetus

Answer 32

when fetal head is towards the fundus

Question 33

vertex presentation of fetus

Answer 33

by 34 weeks; when fetus head is towards the cervical os

Question 34

Which of the following is the MOST accurate way of estimating gestational age in the first trimester?

Answer 34

Crown-rump length

Question 35

The area outside of the amnion is called:

Answer 35

The chorionic cavity

Question 36

The normal HR for first trimester ranges b/n --------------- & ------------------.

Answer 36

120 -170 BPM

Question 37

Using an endovaginal approach, the first structure visualized within a gestational sac is the:

Answer 37

Secondary yolk sac

Question 38

A gestational sac without an embryo is known as:

Answer 38

Anembryonic pregnancy (blighted ovum)

Question 39

The cavity in which the fetus exists is called the

Answer 39

Amniotic cavity

Question 40

To calculate the mean sac diameter of a gestational sac, the following formula should be used:

Answer 40

Length + width + height / 3

Question 41

The 2nd Trimester ranges:

Answer 41

Between weeks 13-26

Question 42

The 3rd Trimester ranges:

Answer 42

Between weeks 27- 40

Question 43

In the first trimester the fetus can be examined:

Answer 43

Transabdominally &Transvaginally

Question 44

Fertilization occurs in ----------------- part of the fallopian tube.

Answer 44

Ampullary

Question 45

The structure that implants in the endometrial cavity is called:

Answer 45

Blastocyst

Question 46

Embryo grows at rate of about:

Answer 46

1-2 mm/day

Question 47

Normal location of the gestational sac is:

Answer 47

Fundus of the uterus

Question 48

Transvaginally -non-visualization of yolk sac when MSD is greater than 8 mm is abnormal

Answer 48

true

Question 49

Fetal pole should be visualized transabdominally when MSD is 25 mm or greater.

Answer 49

true

Question 50

Important measurements for first trimester are?

Answer 50

Mean sac diameter CRL Heart rate

Question 51

Give reasons for requiring ultrasound in first trimester

Answer 51

``` VAGINAL BLEEDING SIZE/DATES DISCREPANCY Large for gestational age Small for gestational age OTHER ABNL DETECTABLE IN FIRST TRIMESTER Ectopic Hydatiform mole Coexisting masses ```

Question 52

Describe the ultrasound appearance of the gestational sac.

Answer 52

Fluid filled chorionic cavity surrounded by the double decidua containing yolk sac and amniotic sac having fetus in it.

Question 53

If no FHM is detected, the sonographer and radiologist must watch for cardiac activity for 30 minutes

Answer 53

true

Question 54

With endovaginal ultrasound, an abnormal pregnancy is suspected when there is failure to visualize the fetal pole with a minimum mean gestational sac diameter (MSD) of

Answer 54

16 mm

Question 55

The area outside of the amnion is called

Answer 55

The chorionic cavity

Question 56

All of the following findings make a head circumference measurement inaccurate EXCEPT

Answer 56

including the cavum septum pellucidum

Question 57

Transcerebellar measurements more or less correspond to gestational age until approximately?

Answer 57

25 weeks

Question 58

Which of the following structures is normally seen in the fetal thorax?

Answer 58

lungs

Question 59

What are the three landmarks for BPD measurement.

Answer 59

Thalmus,third ventricle falx cerebri and Cavum Septum pellucidum

Question 60

What are the three landmarks for AC measurement.

Answer 60

1. stomach 2. portal vein 3. spine

Question 61

What are the 4 basic measurements for gestational assessment in the 2nd & 3rd trimester

Answer 61

BPD HC AC FL

Question 62

What structures should be seen at the level at which the biparietal diameter is measured?

Answer 62

Thalamus, third ventricle falx cerebri, and cavum septum pellucidum

Question 63

The dumbbell-shaped structure(s) inferior and posterior to the cerebrum is(are) the

Answer 63

cerebellum

Question 64

At 10 weeks of gestation, the location of the Yolk sac is?

Answer 64

In the chorionic cavity

Question 65

The fusion of the chorion and amnion occurs between:

Answer 65

13 and 17 weeks

Question 66

The crown-rump length measurement may be used up to the _____ gestational week

Answer 66

12th

Question 67

increased BHCG test can seen in all except:

Answer 67

Multiple gestations or multiple pregnancy

Question 68

The first proof of IUP:

Answer 68

Gestational sac

Question 69

Organogenesis occurs in first -------------- weeks of pregnancy.

Answer 69

10