pass quiz questions Flashcards by Lidia Rivas

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

12th week.

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The anechoic center of a 5- to 6-week gestational sac represents which one of the following?

Chorionic cavity

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Implantation into the uterine decidua is completed within _______ days after fertilization.

12 days

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The blastocyst typically enters the uterus ___________ days after fertilization.

4-5 days

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Typically, the yolk sac resorbs and is no longer visible sonographically by _______ weeks.

12 weeks

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A sonogram at 10 weeks’ gestation demonstrates a cystic area within the posterior cranium. This appearance most likely represents which one of the following?

Normal rhombencephalon

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The diameter of the normal yolk sac should never exceed _______ mm.

6 mm

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In the first trimester, herniated bowel will return within the abdominal cavity by the _________ week.

12 week

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To calculate the mean sac diameter of a gestational sac, which one of the following formulas should be used?

(Length + width + height) ÷ 3

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The embryonic heart begins to beat at __________ days.

35 days

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The beta hCG levels plateau and subsequently decline, whereas the gestational sac continues to grow after _________ weeks.

9-10 weeks

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Which of the following ages refers to the length of time calculated from the first day of the last normal menstrual period to the point at which the pregnancy is being assessed?

Either gestational or menstrual

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Serum maternal hCG levels in a normal intrauterine pregnancy less than 7 weeks should increase by doubling every _______________.

3.5 days

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Which one of the following laboratory tests indicates pregnancy when the values are elevated?

hCG

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The cavity in which the fetus exists is called the _________ cavity.

Amniotic

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Which one of the following is the most frequent sonographic finding in an ectopic pregnancy?

Adnexal mass

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Which one of the following is the most common pelvic mass seen in a first-trimester pregnancy?

Corpus luteum cyst

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An ovum without an embryo is known as which one of the following?

Anembryonic pregnancy

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Multiple tiny clusters of grapelike echoes within the uterine cavity best describes which one of the following?

Gestational trophoblastic disease

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A hemorrhage located between the gestational sac and the myometrium represents which one of the following conditions?

Subchorionic hemorrhage

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Corpus luteum cysts regress and are typically not seen beyond _________ weeks.

16 to 18 weeks

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The increased risk of massive hemorrhage in an ectopic pregnancy is located:

Near the uterine cornua

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Findings in an ectopic pregnancy include all of the following except:

Normal increase in serum beta hCG levels

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Which one of the following statements about a pseudogestational sac is false?

Is eccentrically located within the endometrium.

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The best sonographic correlation in the diagnosis of an ectopic pregnancy is the combination of no intrauterine pregnancy and which one of the following?

Adnexal mass

The most common cause of vaginal bleeding in the first trimester is which one of the following?

Subchorionic hemorrhage

Nuchal translucency must be measured between _____ weeks and _____ weeks, _____ days.

11; 13; 6

Nuchal skin fold thickness of 5 mm or less is normal up to _____ weeks’ gestation.

20 weeks

The size of the cistern magna is obtained by measuring from the _____________ to the ______________.

Vermis; occipital bone

The normal atrium of the lateral ventricle measures equal to or less than______ mm.

10 mm

Which one of the following statements about the fetal liver is false?

The right lobe is larger than the left lobe in the fetal liver.

The fetus lying perpendicular to the maternal sagittal axis is in the ____________ position.

Transverse

Which one of the following structures shunts blood away from the lungs?

Ductus arteriosus

In the transverse plane, an abnormal fetal spine may appear splayed in all of the following configurations except:

y-shape

Especially in the third trimester, a fetus in the breech position may demonstrate a cranium shape of which one of the following?

Dolichocephalic

Fetal anatomy may be assessed accurately after _________________.

18 menstrual weeks

The profile view of the fetal face is important to examine to rule out all of the following abnormalities except:

Cleft soft palate

The cavum septum pellucidi is observed anterior to the _______________.

Thalamus

The cranial bones ossify by ______ weeks.

12 weeks

Because of the low-density brain tissue, the texture of the brain may appear ______________.

Hypoechoic

Normally, the fetal bladder empties at least every ______________.

60 min.

The widest transverse diameter of the skull and the proper level to measure the biparietal diameter (BPD) includes which one of the following structures?

Thalamus

Which one of the following indicates that the liver is on the right, the stomach is on the left, and the heart apex is on the left?

Normal situs

Which one of the following terms indicates that the fetal head is toward the fundus of the uterus?

Breech

Which one of the following structures carries oxygenated blood from the umbilical vein to the inferior vena cava (IVC)?

Ductus venosus

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

Level of the stomach, left portal vein, and spine

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

banana

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

Brachycephaly

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

lemon sign

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

Outer; outer

Asymmetric intrauterine growth restriction (IUGR) may show all of the following except:

Body and head small for dates

One of the growth problems of the diabetic fetus is which one of the following abnormalities?

Macrosomia

An increased incidence of morbidity and mortality as the result of head and shoulder injuries is found in which one of the following?

Macrosomic fetus

IUGR is most commonly defined as a fetal birth weight __________ for a given gestational age.

At or below the 10%

Macrosomia is defined as a birth weight of which one of the following?

Above 90% for estimated gestational age

The placenta of the macrosomic fetus can become which one of the following?

Significantly large

Asymmetric IUGR is usually caused by which one of the following?

Placental insufficiency

High levels of AFP indicate all of the following except:

Down syndrome

An abnormality in the number of chromosomes is called which one of the following?

Aneuploidy

An early noninvasive means of assessing the risk of aneuploidy is which one of the following?

A large cystic hygroma, hydrops, and coarctation of the aorta may be seen in a fetus with which one of the following?

Turner syndrome

The placenta of the macrosomic fetus can become which one of the following?

Significantly large

Chorionic villus sampling (CVS) may include all of the following advantages except:

The results are available within 48 hours

Amniocentesis may be used for all of the following except

Prediction of cardiac abnormalities

Reasons to perform an amniocentesis include all of the following except

Multiple gestations

AFP is found in all of the following fetal structures except:

brain

AFP is produced in early gestation by which one of the following structures?

Yolk sac

The most common aneuploid condition is which one of the following?

Trisomy 21

After amniocentesis, the sonographer should demonstrate and document which one of the following?

Fetal cardiac activity

Continuous monitoring during an amniocentesis with ultrasound is invaluable in patients with which one of the following abnormalities?

Premature rupture of membranes

Low AFP levels have been found in which one of the following?

Fetus younger than expected

The optimal collection site in an amniocentesis includes all of the following except:

Away from the maternal midline