Obs - Antenatal Screening Flashcards
how is due date worked out?
date of LMP + 9months and 7 days
what is done at the booking visit?
gynae/obs Hx lifestyle ethnicity BMI BP Hb, ABO, rhesus syphilis, HIV, hepB+C urinalysis MSSU C+S US DS screen OGTT if risk factors
what is trisomy 18 and 13?
18 - edwards
13 - pataus
what is done at the 16 week scan?
results from dating scan
whooping cough + flu vaccine
what scan is done at 18-20wks?
anomoly scan
placenta site
when can movements of the fetus be felt from?
25wks
what is done at 28 wks?
anaemia screen
OGTT
anti D dose given
when are the further check ups from 28wks?
31/32 if primi 34 36 38 40 41
what risks are associated with early induction?
cord prolapse failure longer labour uterine rupture fetal distress
if DS is suspected, what screening tests would be low?
AFP
oestrial
PAPP-A
if DS is suspected, what screening tests would be high?
HCG
inhibin A
what is the US scan looking for in DS screening?
thickened nuchal translucency
when is the DS screening test offered?
11-13+6
what are the three components of the combined DS test? results?
PAPP-A (low)
HCG (high)
thickened nuchal transluency
what test can be done for DS at 16 weeks? what are the results?
AFP (low)
HCG (high)
oestrial (low)
inhibin A (high)
