We perform a number of specialized procedures using ultrasound technology, including:

• Nuchal translucency
• Fetal echocardiography
• Down syndrome screening

Nuchal Translucency

Nuchal translucency is the collection of fluid under the skin behind the neck of fetuses at 11-13+ weeks. In fetuses with chromosomal abnormalities, cardiac defects and many genetic syndromes, nuchal translucency is increased. We can use ultrasound to measure nuchal translucency and check for these conditions.

Fetal Echocardiography

This is a specialized examination of the fetal heart. It is technically difficult and demanding to perform. It is reserved for particular indications when the fetus is considered to be at risk for heart disease. The indications include: insulin dependent diabetes, family history of congenital heart disease, fetus with other birth defects or possible chromosome abnormality, known fetal Down syndrome, fetal abnormal heart rates, and others.

Though we reserve fetal echocardiography for certain circumstances, we do a careful heart evaluation on all fetal examinations to identify structural abnormalities. The detection rate for serious congenital heart disease is estimated at 80%.

Down Syndrome Screening

Down syndrome screening involves the use of ultrasound for detection of Down syndrome and other chromosome abnormalities. Many fetal structural abnormalities can be identified in the second trimester. This includes spinal and cranial, cardiac, kidney, intestinal, and extremities.

Seattle Ultrasound participates in ongoing research to define the sonographic features that increase the fetal risk for Down syndrome and other similar chromosome abnormalities. This is a part of Seattle Ultrasound's continuous effort in combination with the perinatal obstetricians in refining risk assessment in pregnancy counseling. Seattle Ultrasound's physicians have authored multiple publications in this area and our technical staff is highly skilled in fetal sonographic evaluation.