N 3280 Screening Tests An Assessments
Study Guide 100% Pass
assessment of of fetal well-being in 1st trimester - ANSWER -confirm pregnancy
-confirm viability
-determine gestational age
-detect fetal anomalies
is transvaginal or transabdominal ultrasonography bettwe - ANSWER transvaginal has
better and clearer images
transvaginal ultrasound - ANSWER -detects gestational sac at 4-5 weeks
-fetal heart activity at 6-7 weeks
-BPD measurement and crown length at 14 weeks predicts EDB within 7-10 days
transabdominal ultrasound - ANSWER -fetal heart beat at 10-12 weeks
-fetal weight during pregnancy
screening and diagnostic tests for first trimester - ANSWER -ultrasound
-nuchal translucency
-maternal assays
-chorionic villus sampling
maternal assays - ANSWER -coombs' test
-cell-free (DNA) screening
nuchal translucency - ANSWER measure nuchal folds (accumulation of fluids)
when to screen for nuchal translucency - ANSWER between 10-14 weeks
positive nuchal translucency - ANSWER >3mm
coombs' test - ANSWER -Rh incompatibility
-detects other antibodies for incompatibility with maternal antigens
cell-free DNA screening - ANSWER -fetal Rh status
-fetal gender
, newest screening test for noninvasive prenatal genetic diagnosis - ANSWER cell free
DNA screening
chorionic villus sampling - ANSWER -earlier diagnosis and rapid results
-removal of small tissue specimen from fetal portion of placenta (tissue reflects fetus
genetic makeup)
when to do chorionic villus sampling - ANSWER between 10-13 weeks
where do chorionic villi originate - ANSWER zygote
assessment of fetal well being in 2nd trimester - ANSWER -establish or confirm dates
-confirm viability
-assess placental location
-assess for fetal anomalies
how to establish or confirm dates - ANSWER -uniformity of fetal growth
-allows for biometic measurements
-accurately estimate gestational age
screening and diagnostic tests for second trimester - ANSWER -ultrasound (2D, 3D, 4D,
HD)
-maternal assays alpha-fetoprotein
-amniocentesis
-doppler flow studies
-percutaneous umbilical cord sampling
maternal assay quad screen time frame - ANSWER 15-21 weeks
what does quad screen measure for - ANSWER alpha-fetoprotein
hCG
unconjugated estriol
inhibin A
alpha-fetoprotein - ANSWER maternal serum levels are screened for neural tube defects
what percent of neural tube defects and abdominal wall defects can be detected early -
ANSWER 80-85%
when to perform amniocentesis - ANSWER 15-20 weeks
Study Guide 100% Pass
assessment of of fetal well-being in 1st trimester - ANSWER -confirm pregnancy
-confirm viability
-determine gestational age
-detect fetal anomalies
is transvaginal or transabdominal ultrasonography bettwe - ANSWER transvaginal has
better and clearer images
transvaginal ultrasound - ANSWER -detects gestational sac at 4-5 weeks
-fetal heart activity at 6-7 weeks
-BPD measurement and crown length at 14 weeks predicts EDB within 7-10 days
transabdominal ultrasound - ANSWER -fetal heart beat at 10-12 weeks
-fetal weight during pregnancy
screening and diagnostic tests for first trimester - ANSWER -ultrasound
-nuchal translucency
-maternal assays
-chorionic villus sampling
maternal assays - ANSWER -coombs' test
-cell-free (DNA) screening
nuchal translucency - ANSWER measure nuchal folds (accumulation of fluids)
when to screen for nuchal translucency - ANSWER between 10-14 weeks
positive nuchal translucency - ANSWER >3mm
coombs' test - ANSWER -Rh incompatibility
-detects other antibodies for incompatibility with maternal antigens
cell-free DNA screening - ANSWER -fetal Rh status
-fetal gender
, newest screening test for noninvasive prenatal genetic diagnosis - ANSWER cell free
DNA screening
chorionic villus sampling - ANSWER -earlier diagnosis and rapid results
-removal of small tissue specimen from fetal portion of placenta (tissue reflects fetus
genetic makeup)
when to do chorionic villus sampling - ANSWER between 10-13 weeks
where do chorionic villi originate - ANSWER zygote
assessment of fetal well being in 2nd trimester - ANSWER -establish or confirm dates
-confirm viability
-assess placental location
-assess for fetal anomalies
how to establish or confirm dates - ANSWER -uniformity of fetal growth
-allows for biometic measurements
-accurately estimate gestational age
screening and diagnostic tests for second trimester - ANSWER -ultrasound (2D, 3D, 4D,
HD)
-maternal assays alpha-fetoprotein
-amniocentesis
-doppler flow studies
-percutaneous umbilical cord sampling
maternal assay quad screen time frame - ANSWER 15-21 weeks
what does quad screen measure for - ANSWER alpha-fetoprotein
hCG
unconjugated estriol
inhibin A
alpha-fetoprotein - ANSWER maternal serum levels are screened for neural tube defects
what percent of neural tube defects and abdominal wall defects can be detected early -
ANSWER 80-85%
when to perform amniocentesis - ANSWER 15-20 weeks
