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Obstetrics > % from green tops > Flashcards

% from green tops Flashcards

1
Q

Risk of PPH following a shoulder dystocia?

A

11%

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2
Q

Risk of 3/4th degree tear after shoulder dystocia?

A

3.8%

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3
Q

Risk of brachial plexus injury following shoulder dystocia?

A

2.3 to 16%

(<10% of which will have permanent neurological deficit)

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4
Q

Diabetic mothers increase in risk of shoulder dystocia?

A

2- 4 fold increase in risk

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5
Q

What is the increased risk of shoulder dystocia if you have had a previous shoulder dystocia?

A

10 fold increase

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6
Q

What is the percentage success rate with mcroberts?

A

90%

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7
Q

Risk of early onset GBS with no risk factors? how many in 1000

A

0.2/1000

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8
Q

Risk of early onset GBS if positive in this pregnancy? how many in 1000

A

2.3/1000

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9
Q

Risk of early onset GBS if positive in prev pregnancy? how many in 1000

A

0.9/1000

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10
Q

Risk of early onset GBS if intraprtum pyrexia? how many in 1000

A

5.3/1000

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11
Q

Background risk of VTE in non contraceptive non pregnant patients?

A

2/10,000

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12
Q

Risk of VTE in patients on CHC (out of 10,000)

A

5-7/10,000

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13
Q

Risk of VTE in pregnany (out of 10,000)

A

10/10,000

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14
Q

Recurrence risk for ectopic

A

18.5%
(background risk 10%)

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15
Q

Maternal mortality rates with an ectopic

A

0.2%

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16
Q

How many women who receive methotrexate will require surgical intervention?

A

<10%

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17
Q

How successful is expectant management, when all the criteria are met?

A

57-100%

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18
Q

Risk of maternal haemorrhage from an operative birth?

A

3%

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19
Q

Risk of maternal haemorrhage at fully dilated c section?

A

10%

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20
Q

What percentage of cesareans are performed at full dilatation?

A

4-5%

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21
Q

What percentage of pregnancies are delivered by elective c section

A

10%

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22
Q

How many amniocentesis do you need to perform annually to be deemed competent?

A

30

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23
Q

How common is postnatal psychosis?
(out of 1000)

A

1 in 1000
50% have symptoms on day 1-3

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24
Q

What percentage of polyhydramnios is idiopathic?

A

50-60%

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25
Q

Definition of polyhydramnios in terms of deepest pool

A

> 8 mild
12-15 mod
15 severe

26
Q

Definition of oligohydramnios in terms of deepest pool and AFI

A

Deepest pool <3 (mild), 2 (mod), <1(severe)
Of AFI <7

27
Q

What percentage of births are induced?

A

30%

28
Q

What percentage of anomaly scans will successfully detect spina bifida

A

92%

29
Q

What percentage of anomaly scans will successfully detect anencephaly?

A

100%

30
Q

Recurrence rate of spina bifida?

A

1-5%
Recommend folic acid 5mg

31
Q

What chromosomal abnormality is a cystic hygroma related to?

A

TurnersH

32
Q

What is the risk associated with pregnancy in cystic fibrosis patients?

A

Higher risk of preterm birth and still birth

33
Q

What is the most common risk to convert to an open operation when inserted a transabdominal cervical cerclage

A

Bleeding from uterine vessels
+ poor views from obesity

~10% conversion rate

34
Q

Current rate of TB in UK pregnancy

A

4/100,000

35
Q

Is it safe to breastfeed while having chemotherapy for breast cancer?

A

No, you must wait 14 days after the last dose of chemo
Also cant breastfeed is taking tamoxifen

36
Q

What percentage of AFLD patients will develop an AKI?

A

14%

37
Q

How low does FIGO 2000 have to be in GTD to be treated on single agent chemo?

A

FIGO 2000 <6
Treat with IM MTX every other day with folic acid for 1 week, followed by 6 rest days

38
Q

What is the NNT of caesarean section to treat faecal incontinence?

A

167

39
Q

What is the NNT of caesarean section to prevent perinatal mortality in breech presentation?

A

175-400

40
Q

What is the NNT of caesarean section to prevent adverse outcome in breech presentation?

A

29

41
Q

NNT perinatal mortality with induction of labour at 40 weeks

A

1040

42
Q

NNT to prevent EOGBS with intrapartum fever?

A

208

43
Q

In B thalassaemia patients, how do you test for diabetes and what level should it be below?

A

Serum fructosamine, below 300 for 3 months prior to conceiving

44
Q

% of fetal loss in
appendicitis,
peritonitis 2ndry to appendicitis,
perforated appendix

A

1.5%
6%
36%

45
Q

Rate of diabetes insipidus in pregnancy?

A

Rare!
2-4 in 100,000

46
Q

Which biomarker is related to oligohydramnios?
(options, inhibin, e3, bhcg, pappA, aFP

A

Low E3

47
Q

Risk of PPH following shoulder dystocia

A

11%

48
Q

Incidence of polyhydramnioa

A

1-1.5%

49
Q

What infections are FGM associated with?

A

BV and HSV 2

50
Q

What percentage of women with SCI will have worsening spasticity in pregnancy?

A

10-15%
4.5% have worsening mobility

51
Q

Radiation associated with chest x ray

A

0.0005- 0.01mGy

52
Q

Radiation associated with abdominal x ray

A

0.1- 3mGy

53
Q

Radiation associated with CTPA

A

0.01-0.6mGy

54
Q

low dose scintiography radiation

A

0.1- 0.5mGy

55
Q

Abdominal CT radiaton

A

1- 35mGy

56
Q

Pelvic CT

A

10-50mGy

57
Q

Mammogram radiation?

A

0.001-0.1
reduced by 50% with lead shielding

58
Q

VQ radiation

A

<5mGy

59
Q

What is the radioisotope of choice in a VQ and why?

A

Technetium-99
Avoid iodine as can cause neonatal hypothyroid

60
Q

If HIV pos women conceiving taking dolutegravir what else does she need to take?

A

Higher risk of neural tube defects so needs high dose folic acid

61
Q

When should women with HIV start CART if not already on it?

A

If VL <30,000 start when they can in the second tri but definitely by 24 weeks
If viral load>30,000, start at beginning of second tri
If >100,000 consider starting immediately

Obstetrics (10 decks)

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