obstetric emergencies Flashcards

1
Q

what is shoulder dystocia

A

when the anterior fetal shoulder becomes impacted behind the maternal pubic symphysis after delivery of the head

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2
Q

what is done to manage shoulder dystocia

A

series of manoeuvres to dislodge the shoulder - macroberts manoeuvre, suprapubic pressure, attempt to deliver posterior arm, rotational manoeuvres

effective teamwork and well-rehearsed approach is essential

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3
Q

at what point of labour would shoulder dystocia occur

A

after complete extension but before restitution

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4
Q

dangers of shoulder dystocia

A

umbilical cord entrapment
inability of child’s chest to expand properly
severe brain damage/death due to hypoxia/acidosis if delay in delivery
brachial plexus damage

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5
Q

what is done to manage shoulder dystocia - mnemonic

A

HELPERR

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6
Q

HELPERR

A
H - call for help
E - evaluate for episiotomy
L - legs (McRoberts position)
P - suprapubic pressure
E - enter manoeuvers (internal rotation)
R - remove posterior arm 
R - roll patient (onto all fours)
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7
Q

what is McRoberts position

A

flex hips by around 60 degrees to open pelvis

head rest at 20 degrees

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8
Q

what is the role of episiotomy in shoulder dystocia management

A

creates space for internal manoeuvres to be performed

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9
Q

how common is post partum haemorrhage

A

8/100 women who give birth

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10
Q

what volume of blood loss classes as PPH

A

> 500ml after vaginal delivery

>1000ml after C section

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11
Q

what are the main causes of PPH

A
4Ts
thrombin
tissue
tone 
trauma 

other

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12
Q

causes of PPH - thrombin

A

pre-eclampsia
placental abruption
pyrexia in labour
bleeding disorders - haemophilia, anticoagulation, vonWillebrand disease

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13
Q

causes of PPH - tissue

A

retained placenta
placenta accreta
retained products of conception (RPOC)

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14
Q

causes of PPH - tone

A

placenta praevia
over distension of uterus - multiple pregnancy, polyhydramnios, macrosmia
uterine relaxants
previous PPH

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15
Q

causes of PPH - trauma

A

C section
episiotomy
macrosmia (>4kg baby)

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16
Q

causes of PPH - other

A
asian ethnicity
anaemia
induction
BMI >35
prolonged labour 
age
17
Q

types of PPH

A

1y - 99%, in first 24hrs after delivery, >500ml common (1/20 women), severe haemorrhage >2L rare (6/1000)

2y - >24 hrs to up to 6wks post delivery, often caused by RPOC

18
Q

management of PPH

A
call for help
ABCDE
empty bladder
rub up uterine fundus (massage above umbilicus)
medications
surgical management 
fluid replacement +/- blood products
19
Q

medications for PPH

A
oxytocin 5iu slow IV injection
erfometrine 0.5mg slow IV injection (not if high BP)
oxytocin infusion
tranexamic acid 1g IV
carboprost 0.25mg im (max 8 doses)
misoprostol 800micrograms
20
Q

surgical management of PPH

A

intrauterine balloon tamponade
interventional radiology
B-Lynch suture
Hysterectomy

21
Q

what is important when managing PPH

A

manage on clinical signs not just EBL

22
Q

what is cord prolapse

A

the descent of the umbilical cord through the cervix alongside (occult) or past (overt) the presenting part in the presence of ruptured membrane

23
Q

overall incidence of cord prolapse

A

0.1-0.6%

breech presentation - 1%

24
Q

what is the danger with cord prolapse

A

when cord prolapses below the presenting part of the fetus it is highly likely to become compressed and reduce oxygen supply to the fetus

25
Q

risk factors to cord prolapse - general

A
multiparity
low birthweight (<2.5kg)
preterm labour (<37+0 wks)
fetal congenital anomalies
breech presentation
transverse, oblique and unstable lie
2nd twin
polyhydramnios
unengaged presenting part
low lying placenta
26
Q

risk factors to cord prolapse - general

A
multiparity
low birthweight (<2.5kg)
preterm labour (<37+0 wks)
fetal congenital anomalies
breech presentation
transverse, oblique and unstable lie
2nd twin
polyhydramnios
unengaged presenting part
low lying placenta
27
Q

what is unstable lie

A

when the longitudinal axis of the fetus (lie) is changing repeatedly after 37+0 wks

28
Q

procedure related risk factors for cord prolapse

A

artificial rupture of membranes with high presenting part
vaginal manipulation of the fetus with ruptured membranes
external cephalic version (during procedure)
internal podalic version
stabilising induction of labour
insertion of intrauterine pressure transducer
large balloon catheter induction of labour

29
Q

management of cord prolapse

A

call for help
replace cord into vagina (NOT UTERUS)
perform digital elevation of the presenting part
catheterise and fill bladder to elevate presenting part
encourage mother to adopt knee-chest or left lateral position w/ raised hips
consider tocolysis
arrange cat I C section

30
Q

why do we replace the cord into the vagina during C section

A

reduces the chance of it becoming compressed or of the vessels going into spasm because of the lower temp outside of the body

still at risk of compression to to fetal presenting part being above it