obstetrics Flashcards

(53 cards)

1
Q

which contraception is associated most with weight gain

A

injection - depo-provera

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2
Q

best short-term contraception for after birth

A

POP

at increased risk of VTE following childbirth so avoid COCP

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3
Q

how many days is it until each contraception is effective (if not taken/inserted on first day of period)?

A

instantly: IUD
2 days: POP
7 days: COCP, injection, implant, IUS

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4
Q

COCP and cancer risk

A

increased risk of breast and cervical

decreased risk of ovarian and endometrial

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5
Q

COCP 1 missed pill

A

take the last pill even if it means taking 2 in one day
then continue taking pills daily, one each day
no further action is needed

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6
Q

COCP - if 2 or more pills are missed in week 1

A

consider emergency contraception if UPSI in pill-free week or in week 1
use condoms or abstain until she has taken pills for 7 days in a row

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7
Q

COCP - if 2 or more pills are missed in week 2

A

after 7 consecutive days of taking the COCP there is no need for emergency contraception
use condoms or abstain until she has taken pills for 7 days in a row

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8
Q

COCP - if 2 or more pills are missed in week 3

A

finish pills in current pack, then start a new pack omitting the pill free period
use condoms or abstain until she has taken pills for 7 days in a row

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9
Q

when should a double dose of levonorgestrel be used for emergency contraception?

A

BMI >26 or weight >70kg

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10
Q

mode of action of implant

A

inhibition of ovulation

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11
Q

absolute contraindications for COCP

A
breastfeeding <6 week postpartum
migraine w aura
hx of VTE, stroke or ischaemic heart disease
current breast cancer
>35 years smoking >15/day
any clotting disorders
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12
Q

contraception for trans male (female at birth)

A

avoid COCP
copper IUD does not interfere with hormonal treatments (i.e. testosterone)
POP, implant and injection are thought not to interfere with hormones

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13
Q

contraception for trans female (male at birth)

A

advise to use condoms

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14
Q

how long does IUS last

A

5 years

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15
Q

how long does IUD last

A

5-10 years

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16
Q

delay in changing patch

A

<48h - change patch and no further precautions needed

>48h - change immediately and use barrier protection for 7 days

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17
Q

necessary criteria for lactational amenorrhoea to be reliable method of contraception

A
  1. amenorrhoeic
  2. baby <6 months
  3. breastfeeding exclusively
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18
Q

POP missed pills, what is the ‘safe’ window (i.e. no further action required)

A

desogestrel (Cerazette) has a 12 hours missed pill window

the rest have a 3 hour window

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19
Q

ABX safe in breastfeeding

A

Penicillins
Cephalosporins
Trimethoprim

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20
Q

ABX contraindicated in breastfeeding

A

Ciprofloxacin
Tetracyclines
Sulphonamides

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21
Q

risk factors for 2nd trimester miscarriage

A

Age >35 years
Prev miscarriages
Chronic health conditions
Smoking, heavy alcohol use, illicit drug use
Invasive prenatal genetic tests, e.g. amniocentesis
Large cervical cone biopsy

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22
Q

risk factors for placenta accreta

A

prev. C section

Placenta praevia

23
Q

Bishop score <5 indicates…

Bishop score >=8 indicates…

A

< 5 - labour is unlikely to start without induction
≥ 8 - cervix is favourable and there is a high chance of spontaneous labour, or response to interventions made to induce labour

24
Q

mx if placenta praevia grade III/IV (i.e. covers os)

A

elective C section at 36-37 weeks

25
which contraception should be avoided in menorrhagia
IUD
26
vaccines offered to pregnant women
pertussis | influenza
27
rash in pregnancy with periumbilical sparing
polymorphic eruption of pregnancy
28
what is methotrexate used for in obstetrics
medical mx of ectopic pregnancy
29
what is misoprostol used for
termination of pregnancy (along with mifepristone causes uterine contractions) miscarriage
30
what is mifepristone used for
termination of pregnancy along with misoprostol
31
when does passage of lochia normally cease
4-6 weeks postpartum | ultrasound if persists beyond 6 weeks
32
mx if a woman had group B strep in a previous pregnancy
maternal IV ABX prophylaxis during labour
33
when should a woman with pre-eclampsia be admitted
all need an emergency secondary care assessment | if BP is >=160/110mmHg they should be admitted and observed
34
mx of cord prolapse
presenting part of the foetus should be pushed back into the uterus tocolytics may be used if cord is beyond introitus keep warm and moist but do not push back in ask patient to go onto all fours
35
blistering rash in pregnancy
pemphigoid gestationis
36
infections screened for at antenatal appointments
hep B HIV syphilis
37
causes of raised AFP in prenatal screening
neural tube defects abdominal wall defects multiple pregnancy
38
causes of reduced AFP in prenatal screening
Down's syndrome trisomy 18 maternal diabetes
39
next mx step if late decelerations present on CTG
foetal blood sampling
40
contact w chickenpox <20 weeks not immune no rash
VZIG within 10 days
41
contact w chickenpox >20 weeks not immune no rash
VZIG or antivirals 7-14 days after exposure
42
contact w chickenpox and develops rash
oral aciclovir within 24 hours of rash
43
which beta-hCG is used to measure for ectopic
urine beta-hCG
44
when is magnesium sulphate given in pre-eclampsia
severe hypertension eclampsia (seizure) if birth is planned within 24h concern that eclampsia may develop
45
mx to stop smoking in pregnancy
1. behavioural therapy | 2. nicotine replacement therapy
46
when is screening for Down's performed
11-13+6 weeks
47
what organism causes group B strep
Streptococcus agalacticae
48
causes of increased nuchal translucency
Down's syndrome congenital heart defects abdominal wall defects
49
time until effective IUD (if not first day period)
instantly
50
time until effective POP (if not first day period)
2 days
51
time until effective COC, injection, implant, IUS (if not first day period)
7 days: COC, injection, implant, IUS
52
when is contraception needed postpartum
no contraception is needed until 21 days postpartum unless relying on lactational amenorrhoea
53
when can external cephalic version be attempted
>36 weeks of pregnancy and early labour provided amniotic sac has not ruptured and patient is not in active labour if in active labour and transverse lie is found do emergency c-section