will apply a transducer (wand) to the outside of your stomach to measure your baby from crown to rump and check that the fetal age is accurate. Then he or she will locate the nuchal fold and measure its thickness on the screen.
How does the nuchal translucency ( NT ) scan work? Nuchal translucency (NT) is a collection of fluid under the skin at the back of a baby’s neck. The nuchal translucency scan measures the thickness of this fluid to assess the risk of Down’s syndrome. It can be measured using ultrasound.
Can a diagnostic test be done before a NT scan? However, diagnostic tests carry a small risk of miscarriage. Because of this, your doctor will want you to have a screening test before she’ll recommend a diagnostic test. The screening test combines the NT scan result, with a blood test and other factors, such as your age.
What is the detection rate for a NT scan? The detection rate for the NT scan plus a first-trimester blood test ranges from 79 to 90 percent. (Most tests will include both the NT scan and the blood test.)
When is the NT scan done for Down syndrome? The NT scan is an ultrasound done in the first trimester to determine your baby’s risk of having Down syndrome and some other chromosomal abnormalities. It’s usually done along with a blood test.
Do I need to get nuchal translucency screening?
Do I need to get nuchal translucency screening? Nuchal translucency screening is a type of ultrasound examination that is done in the first trimester to scan for certain medical conditions. It’s often combined with a blood test.
How long do nuchal scan results take? The nuchal translucency screening is a normal ultrasound. You’ll lie on your back while a technician holds a probe against your belly. It will take between 20 to 40 minutes.
What does the nuchal scan test for? The nuchal translucency scan (also called the NT scan) uses ultrasound to assess your developing baby’s risk of having Down syndrome (DS) and some other chromosomal abnormalities, as well as major congenital heart problems. The NT scan measures the clear (translucent) space in the tissue at the back of your baby’s neck.
What is the normal range for NT scan? To be more precise, the normal NT ranges from 1.2 to 2.1mm when the CRL is 45mm. And when the CRL is 84mm, the normal NT range is from 1.9 to 2.7mm. But if it is between 3 and 3.5mm, then it is considered high (6) (7).