|
|
| Radiology
& Diagnostics offers the Newest Technology in Detecting
Genetic Defects. |
|
On June 30, 2004 the American College of Obstetricians and
Gynecologists (ACOG) approved First Trimester NT / free
Beta/ PAPP-A Prenatal Screening for genetic Defects.
|
|
|
First
Trimester Screening combines a Nuchal Translucency (NT) measurement
of fluid at the back of the fetus’ neck and free Beta
hCG and PAPP- A dried maternal blood tests to generate a patient-specific
risk for Down syndrome and Trisomy 18 Chromosomal abnormalities.
The ACOG Committee Opinion notes certain criteria need to be
met for measuring Nuchal Translucency. To ensure consistent
and accurate NT measurements, a national NT training, certificate,
and on-going external audit program is mandatory for any Ultrasonographer
and facility performing the test. NT measurements should be
combined with free Beta/PAPP-A serum biochemical screening to
increase detection and reduce screen positives. |
|
|
|
The US and international
literature have documented 90% detection of Down Syndrome and
97% detection of trisomy 18 with First Trimester NT/free Beta/PAPP-A
Screening. These Studies show the screen positive rates are
lower with dried blood screening than with liquid blood. Low
screen positive rates reduce maternal anxiety and unnecessary
follow up diagnostic testing. When a screening test shows an
increased risk at 11-13 weeks, the patient has greater privacy,
additional options, and safer alternatives than in the second
trimester. Patients can have chorionic villi sampling (CVS)
at 10-12 weeks or an earlier amniocentesis. The exam improves
patient risk assessment and provides earlier options for pregnancy
management. |
| At this time,
it is appropriate to offer First Trimester screening to all
low risk patients as well as to increase risk patients who
decline amniocentesis and CVS. Patients who decline amniocentesis
should be aware that prenatal screening is not a substitute
for a diagnostic test like amniocentesis or CVS.
Radiology & Diagnostics is proud to announce that we
are one of only a few sites in Tennessee to be able to offer
Nuchal Translucency Screening. This First Trimester Prenatal
Screening test, performed only by a certified ultrasound technologist
is available to serve the needs of our community.
BACK |
|
