Numbers 5 Flashcards
1
Q
% of positive GBS swabs at 35-37/40 weeks that are negative at delivery
A
17-25%
2
Q
% of negative GBS swabs at 35-37/40 weeks that are positive at delivery
A
5-7%
3
Q
Risk EOGBS if previous baby with GBS
A
1:700-800
50% carriage
4
Q
Risk EOGBS with positive swab
A
1:400 or 2:1000
5
Q
Risk EOGBS with negative swab
A
1:5000
6
Q
Overall incidence EOGBS (BG)
A
0.57:1000 OR 1:2000
7
Q
Risk of EOGBS if preterm
A
2.3:1000
8
Q
Risk of EOGBS if PIL
A
5.3:1000
9
Q
% planned vaginal breech deliveries needing EMCS
A
40%
10
Q
Risk of stillbirth in VBAC
A
10:10,000
11
Q
% breech undiagnosed
A
25%
12
Q
Incidence of interlocking twins
A
1:817
13
Q
Risk DIC within 4 weeks of IUD
A
10%
14
Q
Risk of DIC >4 weeks of IUD
A
30%
15
Q
% of major contributor to death found in placentas
A
88%
16
Q
% IUD deliver spontaneously within 3/52
A
> 85%
17
Q
% vaginal births achieved within 24hrs with IOL for IUD
A
90%
18
Q
% women with sepsis during IOL for IUD
A
3%
19
Q
% vasa praevia that resolves in 3rd trimester
A
15%
20
Q
Incidence of adverse fetal outcomes in primip homebirth
A
9:1000
BG 5:1000
21
Q
% homebirths transfer to obstetric unit for FTP in 1st stage
A
32%
22
Q
Risk of serious neonatal infection with SROM
A
1%
23
Q
Risk serious neonatal infection with intact membranes
A
0.5%
24
Q
% that labour within 24hrs ROM
A
60%
25
1st stage of labour lasts an average...
8hrs
| unlikely >18hrs
26
2nd and subsequent labours last an average...
5hrs
| unlikely >12hrs
27
Maternal collapse incidence
0.14-6;1000
28
MOH incidence
3.7:1000
29
Aortocaval compression reduces venous return by...
30-40%
30
Placenta receives how much of cardiac output
10%
31
Risk chorioamnionitis in PPROM
30%
32
Mortality rate of severe sepsis
20-40%
33
Mortality rate of septic shock
60%
34
Recurrence of abruption if 2 previous abruptions
19-25%
35
% women with persistent vaginal discharge after UAE
16% at 12/12
36
% fibroid expulsion after UAE
10%
37
% diabetes in pregnancy
5%
38
% PET in diabetic pregnancies
10-20%
39
Aim BM in diabetic pregnancy when fasting/on waking
<5.3mmol/L
40
Aim BM in diabetic pregnancy before meals
4-7mmol/L
41
Aim preconception HbA1C
<48 or <6.5%
42
Avoid pregnancy if preconception HbA1c is...
>86 or >10%
43
Aim BM in diabetic pregnancy 1hr post-prandial
<7.8
44
Aim BM in diabetic pregnancy 2hr post-prandial
<6.4
45
% of GDM needing Metformin or Insulin
10-20%
46
Level of fasting BM prompting immediate insulin treatment
>7
47
Level of fasting BM prompting immediate insulin treatment if macrosomia or polyhydramnios
>6
48
% of increasing insulin requirement in pregnancy with pre-existing DM
30%
49
% risk children of T1DM develop DM
5-6%
50
% risk children of T2DM develop DM
10-15%
51
Aim BM in T1DM preconception fasting/waking
5-7
52
Aim BM in T1DM preconception premeal
4-7
53
% risk of macro prolactinoma enlargening in pregnancy
30%
54
Incidence diabetes insipidus in pregnany
1:30,000
55
Head entrapment in extreme preterm breech delivery
9. 3%
| 5. 6% by CS
56
Serious maternal risks in classical CS
23%
57
% women with DI who deteriorate in pregnancy
50%
58
CAH carrier incidence
1:60
59
% women with CAH + adequate vaginal introitus who are fertile
30-60%
60
% thyroid disorders in pregnancy
2-3%
61
% neonatal thyrotoxicosis with passage of TSH receptor antibodies
1-5%
| Mortality 12-20%
62
% women with hyperemesis gravidarum with gestational thyrotoxicosis
12-20%
63
TSH level in hypothyroidism
>10, irrespective of T4
64
% subclinical hypothyroidism in pregnancy
2-5%
| TSH 2.5-10
65
RCOG recommendation of Vit D per day
1000IU
66
Aim TSH level during 1st trimester
0.2-2.5
67
Aim TSH level during 2nd trimester
0.5-3.0
68
% who die of cardiac failure from iron overload
50%
69
Aim MRI T2 level in beta thalassaemia
>20ms
70
MRI T2 level in beta thalassaemia associated with cardiac failure
<10ms
71
Aim for liver iron in b thalassaemia
<7mg/g
72
Liver iron level that requires iorn chelation
>15mg/g
73
% alloimmunity in beta thalassaemia
16.5%
74
pretransfusion Hb level aim in beta thalassaemia major
>100
75
% AKI in UK pregnancies
1.4%
76
Risk alloimmunisation in SCD
18-36%
77
% SCD with crisis in pregnancy
27-50%
78
% OC in pregnancy
0.7%
79
UK risk stillbirth in OC
5.6:1000
80
% meconium in OC if BA >40
44%
81
% meconium in OC
25%
82
OC recurrence
45-90%
83
% of neonates with haemophilia and no FH
50%
84
Chance mother is carrier if neonate has haemophilia
90%
85
% Haemophilia with clotting factor antibodies
10-40%
86
Normal Factor VIII/IX levels
0.5-2iu/ml
87
Mild haemophilia
0.06-0.4
88
Moderate haemophilia
0.01-0.05
89
Severe haemophilia
<0.01
90
Aim of factor level for procedures
at least 0.5iu/ml
91
Aim of factor level if treatment needed
1iu/ml
92
Overall risk of epidural haematoma
1:16,800
93
Prevalence of clinically relevant von Willebrand's disease
1:10,000
94
Risk of primary PPH in von Willebrand's disease
15-30%
95
Risk of secondary PPH in von Willebrand's disease
25%
96
Aim of VWF:RCo activity
>0.5iu/ml
| aim >1 when treating
97
Increased risk of VTE with antithrombin deficiency
30%
98
% of fetuses exposed to warfarin between 6-12/40 that develop warfarin embryopathy
5%
99
Incidence of PIH
4.2-7.7%
100
% thrombocytopenia caused by gestational thrombocytopenia
75%
101
% thrombocytopenia caused by hypertensive disease of pregnancy
15-20%
102
Platelet aim for regional anaesthesia
>80
103
Platelet aim for vaginal delivery
>50
104
% extensive ICH in severe NAIT
20%
105
Relative risk of VTE in puerperim
20 fold
106
% untreated DVT that leads to PE
15-24%
107
Risk of childhood cancer with V/Q scan
0.5mGy
| (BG 1:17,000/mGy
108
Risk childhood cancer with CTPA
0.1mGy
| BG 1:17,000/mGy
109
Increased risk of breast cancer with CTPA
13.6%
| BG risk 0.1% therefore woman's risk is 0.236%
110
% of VTE in pregnancy with underlying heritable or acquired thrombophilia
50%
111
% of women developing post thrombotic syndrome post DVT
42%
