obstetric emergencies Flashcards
what is shoulder dystocia
when the anterior fetal shoulder becomes impacted behind the maternal pubic symphysis after delivery of the head
what is done to manage shoulder dystocia
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
at what point of labour would shoulder dystocia occur
after complete extension but before restitution
dangers of shoulder dystocia
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
what is done to manage shoulder dystocia - mnemonic
HELPERR
HELPERR
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)
what is McRoberts position
flex hips by around 60 degrees to open pelvis
head rest at 20 degrees
what is the role of episiotomy in shoulder dystocia management
creates space for internal manoeuvres to be performed
how common is post partum haemorrhage
8/100 women who give birth
what volume of blood loss classes as PPH
> 500ml after vaginal delivery
>1000ml after C section
what are the main causes of PPH
4Ts thrombin tissue tone trauma
other
causes of PPH - thrombin
pre-eclampsia
placental abruption
pyrexia in labour
bleeding disorders - haemophilia, anticoagulation, vonWillebrand disease
causes of PPH - tissue
retained placenta
placenta accreta
retained products of conception (RPOC)
causes of PPH - tone
placenta praevia
over distension of uterus - multiple pregnancy, polyhydramnios, macrosmia
uterine relaxants
previous PPH
causes of PPH - trauma
C section
episiotomy
macrosmia (>4kg baby)