Obstetrics

Question 1

Background risk of EOGBS?

Answer 1

0.5/1000

Question 2

Risk of EOGBS if pyrexia in labour?

Answer 2

5.3/1000

Question 3

Incidence of post part in haemorrhage >500mls?

Answer 3

2-5% (cnp)

Question 4

What is not a risk factor for sepsis out of: age, bin, anaemia, gdm?

Answer 4

Age

Question 5

Which is the strongest predisposing risk factor for praevia?

Answer 5

Age > 40years, 9fold increase

Question 6

Vitamin k dependent clotting factors?

Answer 6

2, 7, 9, 10

Question 7

Best way of distinguishing between aflp and pet?

Answer 7

Hypoglycaemia - in aflp, but very rare in pet. Otherwise both cause epigastric pain, proteinuria, deranged lfts and renal function, and hypertension

Question 8

Most common cause of hyperthyroidism in pregnancy?

Answer 8

Graves in >95%

Question 9

Incidence of hyperthyroidism in pregnancy?

Answer 9

1/500

Question 10

Rate of spontaneous vaginal delivery following iol with prostaglandins alone?

Answer 10

61-70%

Question 11

Heritability of haemophilia A - risk of being a carrier? Proportion of newly dx patients with no fhx?

Answer 11

1/20000, 50%

Question 12

Headache and papilloedema - cause?

Answer 12

Idiopathic intracranial hypertension

Question 13

Most appropriate intervention for idiopathic intracranial hypertension?

Answer 13

Acetazolamide

Question 14

Correct dose for local anaesthetic?

Answer 14

3mg/kg, 1% lidocaine = 10mg/ml, therefore e.g. 60kg woman = 18ml (180mg)

Question 15

Dose of adrenaline for anaphylactic shock?

Answer 15

0.5mg (0.5ml of 1:1000)

Question 16

Normal nuchal translucency?

Answer 16

<3.5mm

Question 17

Normal nuchal fold at anomaly scan?

Answer 17

<=6mm

Question 18

Risk of recurrent abruption if 1 previous / 2 previous abruptions?

Answer 18

4.4% and 19-25%

Question 19

Accidental dural puncture, risk of PDPH?

Answer 19

70-80%

Question 20

Timing of PDPH?

Answer 20

Develops 24-48 hours post puncture, untreated lasts 7-10 days but may be up to 6 weeks

Question 21

Recurrence of OC?

Answer 21

45-90%

Question 22

Increased perinatal and neonatal mortality with diabetes?

Answer 22

5-10x increased, circa 3%

Question 23

Incidence of twins? and in ivf?

Answer 23

1.6% and up to 24% in ivf

Question 24

Perinatal mortality rate for twins?

Answer 24

3.7% (vs 0.7% singleton)