Obstetrics Flashcards
Background risk of EOGBS?
0.5/1000
Risk of EOGBS if pyrexia in labour?
5.3/1000
Incidence of post part in haemorrhage >500mls?
2-5% (cnp)
What is not a risk factor for sepsis out of: age, bin, anaemia, gdm?
Age
Which is the strongest predisposing risk factor for praevia?
Age > 40years, 9fold increase
Vitamin k dependent clotting factors?
2, 7, 9, 10
Best way of distinguishing between aflp and pet?
Hypoglycaemia - in aflp, but very rare in pet. Otherwise both cause epigastric pain, proteinuria, deranged lfts and renal function, and hypertension
Most common cause of hyperthyroidism in pregnancy?
Graves in >95%
Incidence of hyperthyroidism in pregnancy?
1/500
Rate of spontaneous vaginal delivery following iol with prostaglandins alone?
61-70%
Heritability of haemophilia A - risk of being a carrier? Proportion of newly dx patients with no fhx?
1/20000, 50%
Headache and papilloedema - cause?
Idiopathic intracranial hypertension
Most appropriate intervention for idiopathic intracranial hypertension?
Acetazolamide
Correct dose for local anaesthetic?
3mg/kg, 1% lidocaine = 10mg/ml, therefore e.g. 60kg woman = 18ml (180mg)
Dose of adrenaline for anaphylactic shock?
0.5mg (0.5ml of 1:1000)
Normal nuchal translucency?
<3.5mm
Normal nuchal fold at anomaly scan?
<=6mm
Risk of recurrent abruption if 1 previous / 2 previous abruptions?
4.4% and 19-25%
Accidental dural puncture, risk of PDPH?
70-80%
Timing of PDPH?
Develops 24-48 hours post puncture, untreated lasts 7-10 days but may be up to 6 weeks
Recurrence of OC?
45-90%
Increased perinatal and neonatal mortality with diabetes?
5-10x increased, circa 3%
Incidence of twins? and in ivf?
1.6% and up to 24% in ivf
Perinatal mortality rate for twins?
3.7% (vs 0.7% singleton)
