MD3 ONG Flashcards
Best way to estimate the duration of a pregnancy on palpation?
From Pubic symphysis to top of palpable uterus (fundus) - at 20 weeks fundus will be at belly button, at 40 weeks it will be just below the rib cage. Between them around 30 weeks.
How can you tell if a baby is getting ready to come on palpation?
Head will descend (in non-breach) and will lose mobility.
What is the normal number of weeks before labour and at what point after this period is the baby at risk?
37 to 42 weeks, a week after that, risk of stillbirth begins to rise.
What actually is amniotic fluid?
Baby pee - marker of well hydrated and nourished baby.
What is the cutoff for pre-eclampsia and which 3 areas of the body are uniquely at risk?
140/90.
Vessels - made stiff - leads to hypertension
Kidneys - hypertension/placental mystery molecules cause proteinuria
Brain - low threshold for seizures
What is HELLP syndrome?
Think of it is a severe form of pre-eclampsia.
H - haemolysis
EL - elevated LFTs causes DIC as all coags are up.
LP - low platelets
What is the medication given to raise seizure threshold in pre-eclampsia?
Magnesium sulphate - but makes patients feel like shit
What is the only true cure for pre-eclampsia and what are some temporary measures?
true cure - remove placenta
in the meantime - atenolol, hydralazine, and mag sulph
Define the following acronyms: EDD, GTT, PPH, LMP
Estimated date of delivery
Glucose tolerance test
Post partum haemorrhage
Last menstrual period
Which two conditions are key to specifically touch on in past obstetric hx at the booking visit?
HTN and diabetes
What is the tool to test for perinatal depression?
Edinburgh Post-natal depression score
When does everyone do a GTT? What about if Hx of gestational diabetes?
28 week visit.
Earlier if PHx. (do twice)
Mnemonic for Ix performed at initial antenatal visit?
FBI RUSHH (CVS)
FBE
Blood group and Rhesus
Iron
Rubella
Urine (MSU for UTI, consider STIs)
Syphilis
Hep B and C
HIV
Consider CVS - CST (opportunistic), varicella serology and scan (USS)
Define primary and secondary PPH and major and minor PPH.
Primary = in first 24 hours after birth
secondary - 24hrs to 12 weeks after.
Minor = 500ml to 1000ml blood loss.
Major is over 1000 or signs of shock.
What is 3rd stage of delivery?
between baby and placenta delivery.
What is the main management difference between a minor and major PPH?
Major needs transfusion immediately, start O neg then switch, consider also FFP and cryoprecipitate (has fibrinogen that’s why).
Describe these 3 major acute causes of PPH - uterine atony, placenta accreta, placenta previa.
atony - uterus not contracting, contraction squeezes blood vessels shut normally.
Accreta - placenta imbedded into uterine wall - doesnt detach with birth - bleeds heavily
previa - placenta covering cervix.
One pharm and one surg Mx for uterine atony.
pharm - oxytocin
surg - balloon tamponade
What medication may help prevent pre-eclampsia and when should it be ceased?
low dose aspirin to be ceased at 36 weeks.
What is an ECV?
Extra cephalic version - palpate the baby away from breach position into better position
3 major Ix/interventions performed at the 28 week appointment vs the 36 week?
28 - FBE, anti-D if needed, GTT
36 - FBE, anti-D if needed, GBS swab
Who needs Anti-D?
Rho neg mums with + babies
When are the two main USS done for most women?
12 and 20 weeks.
Which complication does folic acid aim to avoid?
Spina bifida