antenatal care and screening in pregnancy Flashcards
booking visit should be done at
12 weeks
FBC done at booking visit, what 4 things do you look for?
antibodies, glucose syphilis, rubella
when do you fo alpha feto protein?
14 weeks
USS?
18 weeks
anti D at?
28 weeks
BPS at?
42 weeks
what is BPS?
biophysical profile - assessment of fetal wellbeing
what do anti d antibodies do?
naeutralise any rhd positive rhesus antigens, stops mother generating an immune response to it. ie stops mother making antibodies against rhesus antigen
at booking visit, what investigatons are done?
Hb, ABO, rhesus, syphilis, rubella, HIV, hep B and C
also do urinalysis, MSSU and c and S
y
what does ultrasound at the booking visit confirm?
viability, number of fetus, gestation
at follow up what is done on examination?
bp and urinalysis, symphysis - fundal height, lie and presentation, engagement of presenting part, fetal heart auscultation
downs syndrome risk assessment - what can you test in first trimester?
skin thickness behind fetal neck using ultrasound (nuchal thickness)
when is this done?
11-13 + 6 weeks
what is it combined with?
HCG and PAPP-A
2nd trimester - when is blood sample (assay of HCG and AFP done?)
15-20 weeks
for first and second trimester tests, incorporate the measurement/results with maternal age and give personal risk)
y
a risk of greater than__________requires further assessment?
1:250
what would this assessment be?
amniocentesis
_____AFP, ______HCG and maternal age of _____ gives highest risk of _______
low, high, 40, 1:10. (h block)
does a low risk exclude downs syndrome?
no
when is amniosccentesis usually performed?
15 weeks
miscarriage rate of?
1%
chronic villus sampling - when is it one? mc rate?
12 weeks, 1-2%
