NUCHAL TRANSLUCENCY &
CERVICAL LENGTH QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% COREECT!!!
Q: What is nuchal translucency (NT)?
A: NT refers to the fluid that naturally collects at the back of a fetus's neck. It
is visible via ultrasound between 11 and 14 weeks of pregnancy and can be a
marker for chromosomal abnormalities.
Q: When is nuchal translucency measured during pregnancy?
A: Between 11 and 14 weeks in the first trimester.
Q: Why might an NT scan be ordered?
A:
As part of integrated prenatal screening
For evaluation in twin pregnancies
Q: What factors are included in an integrated screening?
A:
Maternal age
Nuchal translucency measurement
Fetal heart rate
Bloodwork: serum-free beta hCG and AFP
This type of screening can detect:
~90% of Down syndrome (Trisomy 21) cases
~80% of Trisomy 13 cases
Some cases of triploidy and Turner syndrome
Q: What maternal factor increases the likelihood of anomalies?
A: Older maternal age
Q: What factor decreases the detection of anomalies on NT screening?
A: Advancing gestational age, as approximately 30% of affected fetuses may
not survive past 14 weeks.
, Q: How is nuchal translucency measured and what is considered abnormal?
A: NT is measured from front to back (anteroposterior).
A measurement greater than 3 mm is typically considered elevated
and may require further evaluation.
Abnormal thickness associated with - ANSWERS✔✔- aneuploidy
- Turner's Syndrome (45X, XO)
- Trisomies 21, 18, 13
- abnormal karyotype
- fetal death
- cardiac anomalies
- diaphragmatic hernias
When documenting NT how many times do you do the measurement? -
ANSWERS✔✔3
Of the three measurements which / what will you report? - ANSWERS✔✔the
best measurement
If a fetus has a thickened nuchal and a normal karyotype the risk remains that
as many as 27% demonstrate a wide range of congenital malformation, in
particular congenital heart disease. Therefore a ____ will be needed -
ANSWERS✔✔detailed second trimester fetal survey
A thickened nuchal often ____ or becomes ____ prominent as pregnancy
progresses - ANSWERS✔✔resolves; less
With resolution of the NT, should that be considered reassuring? -
ANSWERS✔✔NO!
Fetus remains at an increased risk for poor outcome as a result of preterm
delivery or growth retardation
Performing a NT
- What is the CRL?
- What is the magnification?
- What view should be obtained?
- What is the fetal position? - ANSWERS✔✔CRL: 45-84 mm
Mag: fetal head and thorax occupy the whole screen
CERVICAL LENGTH QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% COREECT!!!
Q: What is nuchal translucency (NT)?
A: NT refers to the fluid that naturally collects at the back of a fetus's neck. It
is visible via ultrasound between 11 and 14 weeks of pregnancy and can be a
marker for chromosomal abnormalities.
Q: When is nuchal translucency measured during pregnancy?
A: Between 11 and 14 weeks in the first trimester.
Q: Why might an NT scan be ordered?
A:
As part of integrated prenatal screening
For evaluation in twin pregnancies
Q: What factors are included in an integrated screening?
A:
Maternal age
Nuchal translucency measurement
Fetal heart rate
Bloodwork: serum-free beta hCG and AFP
This type of screening can detect:
~90% of Down syndrome (Trisomy 21) cases
~80% of Trisomy 13 cases
Some cases of triploidy and Turner syndrome
Q: What maternal factor increases the likelihood of anomalies?
A: Older maternal age
Q: What factor decreases the detection of anomalies on NT screening?
A: Advancing gestational age, as approximately 30% of affected fetuses may
not survive past 14 weeks.
, Q: How is nuchal translucency measured and what is considered abnormal?
A: NT is measured from front to back (anteroposterior).
A measurement greater than 3 mm is typically considered elevated
and may require further evaluation.
Abnormal thickness associated with - ANSWERS✔✔- aneuploidy
- Turner's Syndrome (45X, XO)
- Trisomies 21, 18, 13
- abnormal karyotype
- fetal death
- cardiac anomalies
- diaphragmatic hernias
When documenting NT how many times do you do the measurement? -
ANSWERS✔✔3
Of the three measurements which / what will you report? - ANSWERS✔✔the
best measurement
If a fetus has a thickened nuchal and a normal karyotype the risk remains that
as many as 27% demonstrate a wide range of congenital malformation, in
particular congenital heart disease. Therefore a ____ will be needed -
ANSWERS✔✔detailed second trimester fetal survey
A thickened nuchal often ____ or becomes ____ prominent as pregnancy
progresses - ANSWERS✔✔resolves; less
With resolution of the NT, should that be considered reassuring? -
ANSWERS✔✔NO!
Fetus remains at an increased risk for poor outcome as a result of preterm
delivery or growth retardation
Performing a NT
- What is the CRL?
- What is the magnification?
- What view should be obtained?
- What is the fetal position? - ANSWERS✔✔CRL: 45-84 mm
Mag: fetal head and thorax occupy the whole screen
