Disorders of early pregnancy Flashcards

1
Q

when is a heartbeat established with an early pregnancy

A

22 days

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2
Q

what is defined as a spontaneous miscarriage

A

fetus delivers or dies <24 weeks old

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3
Q

when does spontaneous miscarriage normally occur

A

<12 weeks

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4
Q

what is the cause of >60% of spontaneous miscarriages?

A

isolated chromosomal defects

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5
Q

how does a spontaneous miscarriage usually present

A

bleeding

pain

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6
Q

during a suspected spontaneous miscarriage, how does bHCG levels help inform diagnosis

A

in a viable pregnancy bHCG levels increase by >65%, whereas in a non-viable pregnancy they decrease >50%

anywhere inbetween suggests an ectopic

molar pregnancy will show >100,000 IU (dramatically raised)

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7
Q

what should happen if someone presents with spontaneous miscarriage symptoms + fever

A

swabs + Abx

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8
Q

what is useful in a spontaneous miscarriage of a non-viable foetus

A

IM ergometrine as it prevents bleeding by contracting the uterus

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9
Q

when should rhesus -ve women be given anti D in the context of a spontaneous miscarriage

A

if there has been bleeding >12 weeks or if medical/surgical treatment has been performed

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10
Q

what are the types of spontaneous miscarriage

A
threatened miscarriage 
inevitable miscarriage 
complete miscarriage
incomplete miscarriage 
septic miscarriage
missed miscarriage
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11
Q

what are features of threatened miscarriage

A

there is bleeding but the foetus is alive
cervical os is closed
uterus is of the expected size

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12
Q

what % of threatened miscarriages go on to miscarry

A

25%

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13
Q

what are the features of an inevitable miscarriage

A

heavy bleeding
foetus may still be alive
cervical os is open

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14
Q

what are the features of an incomplete miscarriage

A

some foetal parts have already passed

os is open

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15
Q

what are the features of a complete miscarriage

A

all foetal parts have been passed
bleeding has diminished
uterus is no longer enlarged
cervical os closed

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16
Q

what are features of septic miscarriage

A

contents of the uterus causing endometritis
offensive vaginal discharge
tender uterus
not necessarily feverish

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17
Q

what features make you think a septic miscarriage has caused a pelvic infection

A

peritonism

abdominal pain

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18
Q

what are the features of a missed miscarriage

A

foetus died in utero with no symptoms
not noticed until bleeding/USS
uterus smaller than expected
os is closed

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19
Q

how should you manage a non-viable intrauterine pregnancy

A

expectant management: watch and wait

medical management: vaginal/oral misoprostol

surgical: evacuation of retained products of conception , essentially vacuuming the non-viable pregnancy out under GA

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20
Q

what are complications of surgical management of a non-viable intrauterine pregnancy (ERPC)

A

Excessive vaginal bleeding may occur with expectant or medical management – may require surgical intervention (10-40%)

Infection (3%) - similar across all managements

Surgical management may remove some endometrium causing Asherman’s syndrome (excessive scarring in the uterus causing adhesions/the walls to stick to each other)

Surgical management may also perforate the uterus (<1%)

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21
Q

what are the success rates for incomplete miscarriages for each intervention

A

> 80% - expectant

>95% - surgical

22
Q

what are the success rates for missed miscarriages for each intervention

A

expectant - 30-70%
medical - 40-90%
surgical - 95%

23
Q

what qualifies as recurrent miscarriage

A

3 successive miscarriages

24
Q

whats the prevalence of recurrent miscarriage

A

1%

25
Q

is someone has had 3 successive miscarriages what is the risk of miscarriage for the 4th pregnancy

A

40%

26
Q

what are causes of recurrent miscarriages

A

Antiphospholipid antibodies

Parental chromosomal defects

Anatomical defects

Infection

Hormonal Issues (PCOS, thyroid)

Obesity

Smoking

Excess Caffeine

Older maternal age

27
Q

why does antiphospholipid syndrome cause miscarriages and what tends to be the treatment

A

thrombosis in uteroplacental circulation

asprin + LMWH

28
Q

What are the statutory grounds for abortion in England

A

There is a risk to the physical or mental health of the woman if the pregnancy was continued

There is a risk of death to the pregnant women

The foetus is <24 weeks

Substantial risk of severe mental/physical abnormalities causing a handicap

29
Q

when should rhesus -ve women receive anti-D in reference to planned abortions

A

within 72 hours

30
Q

what gestation should surgical abortions be used

A

7-14 weeks gestation

31
Q

how is a surgical abortion carried out

A

cervix is prepared with topical misoprostol and antibiotic prophylaxis is given

vacuum is used to evacuate foetus

32
Q

what gestation should medical abortions be used at

A

<7 weeks, 12-24 weeks, but can be used whenever

33
Q

how is a medical abortion carried out

A

mifeprostone + prostaglandin 36-48 hours later

34
Q

what method for medical abortions tends to be used >22weeks gestation if there is a foetal abnormality present

A

feticide via injection of KCL into the foetal heart/umbilical vein

35
Q

what are the complications of a surgical abortion

A

Haemorrhage - 1 in 1000

Infection – 10% (reduced by prophylactic antibiotics)

Uterine perforation

Cervical trauma

Failure (<5% surgical/medical require further intervention – <1% risk of total failure)

Preterm delivery

Associated with multiple surgical terminations

Unsafe abortion

36
Q

whats the definition of an ectopic pregnancy

A

foetus implants outside the uterine cavity

37
Q

where are the majority of ectopic pregnancies

A

fallopian tube

38
Q

what is the major worry with ectopic pregnancy

A

rupture of the fallopian tubes, massive blood loss and death

39
Q

what are some risk factors for ectopic pregnancy

A
assisted conception 
pelvic surgery
PID
previous ectopics
smoking
40
Q

how does an ectopic pregnancy present

A

Lower abdominal pain, starts colicky but becomes constant

Vaginal bleeding

Shoulder tip pain/syncopal episodes (intraperitoneal bleeding)

Amenorrhoea for 4-10 weeks previously

Rebound tenderness (peritonitis)

Cervical excitation (extremely painful cervix on bimanual examination)

Adexum tenderness

Uterus is smaller than expected

Cervical os closed

41
Q

how should you investigate any ?ectopic pregnancy

A

Pregnancy test

USS – may not detect ectopic but absence of intrauterine pregnancy + +ve pregnancy test = high suspicion

Quantitative serum bHCG –

> 1000 IU/ml = viable intrauterine pregnancy

> 63% rise in 48 hours = early viable intrauterne pregnancy

Outside of these parameters suggests ectopic/non-viable pregnancy

Laparoscopy

42
Q

what is the overall management for ectopic pregnancy

A

for all: IV access, cross match, anti-D if Rh-

medical: single dose of methotrexate
surgical: salpingostomy/salpingectomy

43
Q

when is surgical management appropriate in ectopic pregnancy

A

Woman in severe pain

Adnexal mass >35mm

Visible foetal heart activity

BHCG >5000 IU/ml

44
Q

when is medical management appropriate in ectopic pregnancy

A

Patient able to attend follow up

Has no significant pain

Adnexal mass <35mm

No foetal heart activity

No co-existing intrauterine pregnancy

45
Q

what is correlated with success rate with medical management of an ectopic pregnancy

A

bHCG level

46
Q

how often is a follow up dose required for medical management of ectopic pregnancy

A

15%

47
Q

how often is surgical mangagement required in medical management of ectopic pregnancy

A

10%

48
Q

what are complications of hyperemesis gravidarum

A

metabolic disturbance
malnutrition
dehydration

49
Q

what gestational period is hyperemesis gravidarum mostly active for

A

first 14 weeks

50
Q

what patient population is hyperemesis gravidarum more common in

A

multiparous women

51
Q

what are predisposing conditions for hyperemesis gravidarum

A

UTI
molar pregnancy
multiple pregnancy

52
Q

what is the treatment for hyperemesis gravidarum

A

IV hydration

Antiemetics (cyclizine 1st line)

Thiamine given (B12) to prevent neurologial complications

Steroids used in severe cases