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OB Final Study > Chapter 50 > Flashcards

Chapter 50 Flashcards

1
Q

Which one of the following biometric measurements is more useful as a growth parameter?

a. BPD
b. Head circumference
c. CRL
d. AC

A

d. AC

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2
Q

The absence of an embryo in an intrauterine pregnancy of 7 to 8 weeks is consistent with which one of the following?

a. Placenta previa
b. Ectopic pregnancy
c. Anembryonic pregnancy
d. Multiple gestation

A

c. Anembryonic pregnancy

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3
Q

Which one of the following sonographic signs refers to the shape of the cerebellum when a spinal defect is present?

a. Sandwich
b. Strawberry
c. Banana
d. Lemon

A

c. Banana

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4
Q

The abdominal circumference (AC) is taken at the _________________.

a. Diameter of the fetal abdomen
b. Level of the stomach, left portal vein, and left umbilical vein
c. Diameter of the fetal abdomen at the level of the kidneys and diaphragm
d. Level of the kidneys and bladder

A

b. Level of the stomach, left portal vein, and left umbilical vein

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5
Q

With transvaginal sonography, the earliest appearance of a normal intrauterine gestational sac should be seen with a serum beta human chorionic gonadotropin (hCG) greater than _____ mega international units per milliliter (mIU/ml).

a. 500
b. 1000
c. 1500
d. 2000

A

a. 500

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6
Q

A condition in which the fetus is not growing as fast as normal is which one of the following terms?

a. Growth-adjusted sonar age
b. Age-range analysis
c. IUGR
d. Microcephaly

A

c. IUGR

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7
Q

With normal transvaginal sonography, cardiac activity should be demonstrated when the CRL exceeds ______ mm.

a. 5
b. 6
c. 7
d. 8

A

c. 7

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8
Q

Gestational age can best be predicted from which one of the following?

a. Interocular distance
b. Orbital diameter
c. Intraocular distance
d. BD

A

d. BD

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9
Q

Which one of the following statements about the femur length measurement is true?

a. Is taken from the pointed end to the pointed end.
b. Should include the distal femoral epiphysis.
c. Includes only the femoral diaphysis.
d. Should include the femoral head.

A

c. Includes only the femoral diaphysis.

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10
Q

When the gestational mean sac diameter (MSD) exceeds _____ millimeters (mm), an embryo with definite cardiac activity should be clearly seen with transvaginal scanning.

a. 7
b. 10
c. 13
d. 16

A

d. 16

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11
Q

Which one of the following statements describes the binocular distance (BD)?

a. Includes both orbits at the same time.
b. Is the length between the two orbits.
c. Is the distance of an orbit.
d. Is the depth of both orbits.

A

a. Includes both orbits at the same time.

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12
Q

Linear acceleration of the embryonic heart rate correlates well with gestational age up to _________________ weeks.

a. 8 menstrual
b. 9 gestational
c. 10 menstrual
d. 12 conception

A

b. 9 gestational

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13
Q

The plane used for a coronal head circumference (CHC) should include which one of the following structures?

a. CSP and falx cerebri
b. Third ventricle and brainstem
c. Thalamus and brainstem
d. Atrium of the lateral ventricle and thalamus

A

c. Thalamus and brainstem

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14
Q

When measuring the gestational sac, all of the following statements are true except:

a. A distended urinary bladder can compress the sac from round to ovoid.
b. If the sac is round, one diameter should be measured.
c. If the sac is ovoid, measurements cannot be obtained.
d. If the sac is ovoid, the anteroposterior and width is measured to obtain mean diameter.

A

c. If the sac is ovoid, measurements cannot be obtained.

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15
Q

All long bones should be measured if the difference between the femur length and all other biometric parameters is which one of the following?

a. Greater than 3 weeks
b. Greater than 4 weeks
c. Greater than 1 week
d. 2 weeks or greater

A

d. 2 weeks or greater

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16
Q

The fetus is categorized into the small, average, or large growth percentiles in which one of the following methods?

a. Intrauterine growth restriction (IUGR)
b. Biophysical profile
c. Growth-adjusted sonar age
d. Age-range analysis

A

c. Growth-adjusted sonar age

17
Q

Measurement of the BD is taken from the ___________ edge of one orbit to the ___________ edge of the contralateral orbit.

a. Outer; inner
b. Inner; inner
c. Outer; outer
d. Inner; outer

A

c. Outer; outer

18
Q

The fetal orbits should be measured:

a. At the same level as the BPD
b. In a plane slightly caudal to the BPD
c. In a plane slightly cephalic to the BPD
d. In the occipitoanterior position

A

b. In a plane slightly caudal to the BPD

19
Q

Which one of the following measurements is the most accurate for determining gestational age in the first trimester?

a. Crown-rump length (CRL)
b. BPD
c. MSD
d. Yolk sac diameter

A

a. Crown-rump length (CRL)

20
Q

Measurement of the BPD is taken from the __________ edge to the ___________.

a. Outer; inner edge
b. Outer; outer edge
c. Inner; inner edge
d. Outer; falx multiplied by two

A

a. Outer; inner edge

21
Q

The condition that shows the fetal head elongated in the transverse diameter and shortened in the anteroposterior diameter is known as which one of the following?

a. Dolichocephaly
b. Elongichocephaly
c. Brachycephaly
d. Minicephaly

A

c. Brachycephaly

22
Q

Frontal bones of the cranium that collapse forward describe which one of the following abnormalities?

a. Banana sign
b. Lemon sign
c. Mickey Mouse sign
d. Acrocephaly

A

b. Lemon sign

23
Q

The biparietal diameter (BPD) is the measurement of the fetal head at the level of which of the following structures?

a. Thalamus and cavum septum pellucidum (CSP)
b. Frontal horns and third ventricle
c. Peduncles and septum pellucidum
d. Thalamus and fourth ventricle

A

a. Thalamus and cavum septum pellucidum (CSP)

24
Q

Which one of the following measurements is devised to determine the normality of the fetal head shape?

a. Head circumference
b. BPD
c. Head circumference:abdominal circumference ratio
d. Cephalic index

A

d. Cephalic index

25
Q

Which one of the following fetal measurements is about as accurate as the BPD in determining gestational age?

a. AC
b. Head circumference
c. Femur length
d. Cephalic index

A

c. Femur length

OB Final Study (4 decks)

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