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DMS 106 > quiz 3 study guide > Flashcards

quiz 3 study guide Flashcards

1
Q

Placenta accreta sonographic appearance shows ?

A

loss of retroplacental anechoic strip

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2
Q

-Placenta increta sonographic appearance?

A

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

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3
Q

Placenta percreta, the placenta attaches ____?

A

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

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4
Q

Placenta percreta sonographic appearence ?

A

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

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5
Q

normal measurement of nuchal fold thickness is

A

6 (18-24 weeks)

5 (16- 18 weeks)

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6
Q

normal measurement of nuchal translucency is

A

< 3mm

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7
Q

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

A

cerebellum

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8
Q

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

A

true

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9
Q

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

A

CRL, AC, FL, HC, BPD

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10
Q

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

A

GA
fetal anatomy
AFI
fetal position

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11
Q

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

A

determine fetal position
decide plane of view
determine focal zone
weight

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12
Q

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

A

eyes/orbits, asymmetrical cerebral hemispheres

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13
Q

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

A

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

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14
Q

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

A

25 weeks

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15
Q

corpus luteal cyst of pregnancy can be seen up to ___

A

15 weeks

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16
Q

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

A

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

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17
Q

cisterna magnum lies between ?

A

cerebellum and cranium

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18
Q

lateral ventricles are identified by ___ weeks

A

16

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19
Q

choroid plexus has a prominent _____ area within the lateral ventricle

A

echogenic

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20
Q

fetal heart rate is ?

A

120-160 bpm

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21
Q

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

A

20 weeks

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22
Q

fetal stomach can be visualized by ____ weeks.

A

20 weeks

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23
Q

fetal bladder can be visualized by____ weeks .

A

20 weeks

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24
Q

fetal bowel can be visualized in ___ trimester.

A

3rd

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25
Q

fetal kidney can be visualized by ___ weeks.

A

15-16 weeks

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26
Q

fetal weight is based on?

A

bpd, HC, AC, FL

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27
Q

accurate identification of female genitalia is by ___

A

20 weeks

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28
Q

vertebrae can be well visualized by ____ weeks

A

16 weeks

29
Q

placenta is organized into lobules called ?

A

cotyledons

30
Q

placenta weights between

A

450-550 g

31
Q

thickness of placenta is

A

4-5.0 cm in thickness

32
Q

breech presentation of fetus

A

when fetal head is towards the fundus

33
Q

vertex presentation of fetus

A

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

34
Q

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

A

Crown-rump length

35
Q

The area outside of the amnion is called:

A

The chorionic cavity

36
Q

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

A

120 -170 BPM

37
Q

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

A

Secondary yolk sac

38
Q

A gestational sac without an embryo is known as:

A

Anembryonic pregnancy (blighted ovum)

39
Q

The cavity in which the fetus exists is called the

A

Amniotic cavity

40
Q

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

A

Length + width + height / 3

41
Q

The 2nd Trimester ranges:

A

Between weeks 13-26

42
Q

The 3rd Trimester ranges:

A

Between weeks 27- 40

43
Q

In the first trimester the fetus can be examined:

A

Transabdominally &Transvaginally

44
Q

Fertilization occurs in —————– part of the fallopian tube.

A

Ampullary

45
Q

The structure that implants in the endometrial cavity is called:

A

Blastocyst

46
Q

Embryo grows at rate of about:

A

1-2 mm/day

47
Q

Normal location of the gestational sac is:

A

Fundus of the uterus

48
Q

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

A

true

49
Q

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

A

true

50
Q

Important measurements for first trimester are?

A

Mean sac diameter

CRL

Heart rate

51
Q

Give reasons for requiring ultrasound in first trimester

A 
VAGINAL BLEEDING
SIZE/DATES DISCREPANCY
Large for gestational age
Small for gestational age
OTHER ABNL DETECTABLE IN FIRST TRIMESTER
Ectopic
Hydatiform mole
Coexisting masses
52
Q

Describe the ultrasound appearance of the gestational sac.

A

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

53
Q

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

A

true

54
Q

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

A

16 mm

55
Q

The area outside of the amnion is called

A

The chorionic cavity

56
Q

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

A

including the cavum septum pellucidum

57
Q

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

A

25 weeks

58
Q

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

A

lungs

59
Q

What are the three landmarks for BPD measurement.

A

Thalmus,third ventricle falx cerebri and Cavum Septum pellucidum

60
Q

What are the three landmarks for AC measurement.

A
  1. stomach
  2. portal vein
  3. spine
61
Q

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

A

BPD

HC

AC

FL

62
Q

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

A

Thalamus, third ventricle falx cerebri, and cavum septum pellucidum

63
Q

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

A

cerebellum

64
Q

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

A

In the chorionic cavity

65
Q

The fusion of the chorion and amnion occurs between:

A

13 and 17 weeks

66
Q

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

A

12th

67
Q

increased BHCG test can seen in all except:

A

Multiple gestations or multiple pregnancy

68
Q

The first proof of IUP:

A

Gestational sac

69
Q

Organogenesis occurs in first ————– weeks of pregnancy.

A

10

DMS 106 (2 decks)

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