OBSTETRIC EMERGENCIESNEDSim

2014

PRACTICAL CONSIDERATIONS / DIFFERENCES ARE THERE WHEN RESUSCITATING A PREGNANT WOMAN?1) Position: a partial roll, placing a knee, or wedge under the woman’s pelvis and preferably manually displacing the gravid uterus off the midline will help prevent / alleviate aorto-caval compression.2) Have neonatal resus gear brought to the scene as well as your normal adult trolley – a resuscitation cot is ideal.3) Late pregnancy = difficult airway / ventilation and rapid desaturation – so it might be better to intubate early, though this will depend on your skills and resources at the scene.  CPR still comes first.4)  YES, defibrillation is OK.  Just take off  the wires for CTG etc – they are not useful anyway in an arrest!

NORMAL DELIVERY Normal Births Ambulances will bring labouring women to ED if

delivery is imminent i.e. presenting part on view. Call the midwife and warm the resuscitaire. Unless the mother is at high risk for PPH (e.g. grand multip) there is

no need for a cannula. Allow her to stand, lean against a bed or chair, lie flat, or go on all

fours if she wants. Reclining supine on a trolley at 45% is about the worst possible

position for birth. Advising her to push is probably unhelpful: she will push when she

feels the urge.

Anticipate a delay of 1-2 minutes after the head is delivered, before the final contractions.

Support baby’s head, but do not flex the neck to deliver the shoulders: it doesn’t help and may even cause brachial plexus injury.

When you see the anterior shoulder at the introitus, get ready to catch! When born, dry and wrap baby and place on the mother’s belly. Assuming baby is at term and healthy, you can wait until the cord stops

pulsating before clamping and dividing. This can take 10-15 minutes. The placenta should detach spontaneously. Do not pull the cord as this can

cause uterine inversion and prolapse. It is normal for mothers to lose 200-400ml in the third stage of pregnancy. If dad has a cigar, he should smoke it outside the hospital gates. –

RED FLAGS: IMMEDIATE O&G ATTENDANCE

CORD PROLAPSE Incidence: 1/200 births. You have been struck by obstetric

lightning. Mortality: 15% neonatal demise. Management: knee-elbow position: pressure on presenting part. RUSH to OT for urgent Caesarian. instillation of 500ml NS fluid into the bladder via catheter (Vago’s

method) is of doubtful benefit at this late stage

SHOULDER DYSTOCIAFAILURE TO RESTITUTE AND TURTLING. MEANING THAT THE HEAD WON’T EXTERNALLY ROTATE WHEN IT IS DELIVERED, AND IT WITHDRAWS BACK INTO THE MATERNAL PERINEUM FOLLOWING EACH CONTRACTION.

Incidence: 1/100 births. You have been hit by an obstetric curve-ball.

Mortality: about 50% of neonates will sustain a lethal injury if not delivered within 5 minutes.

Management: don’t tell her to push: it will make things worse. 4 sequential manoeuvres at 30 second intervals. Each with the aim of delivering the anterior shoulder. Go to the

next if unsuccessful. manoeuvre 1 (t = 0 sec) McRobert’s: lie flat, hyperflex hips. Relieves 40% of shoulder dystocias - See more at: http://stem.org.au/stem/obstetric-nightmares?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+FOAMEM+%28FOAM+RSS%29#sthash.vLXwhVpD.CXPwybzi.dpuf

MANOEUVRE 1 (T = 0 SEC) MCROBERT’S: LIE FLAT, HYPERFLEX HIPS. RELIEVES 40% OF SHOULDER DYSTOCIAS

MANOEUVRE 2 (T = 30 SEC) - SUPRAPUBIC PRESSURE TO ROTATE BABY’S SHOULDERS INTO OBLIQUE PLANE (SOMETIMES CALLED RUBEN’S I). IN COMBINATION RELIEVES 60%

MANOEUVRE 3 (T = 60 SEC) IS INVASIVE: PRESSURE ON BACKS OF BABY’S SHOULDERS, AGAIN TO ROTATE INTO OBLIQUE PLANE. THIS IS CALLED RUBEN’S II IF APPLIED TO ANTERIOR SHOULDER, OR WOOD’S SCREW IF APPLIED TO POSTERIOR SHOULDER.

Shoulder dystocia

                                             

                                               

                                             

                                             

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MANOEUVRE 4 (T = 90 SEC) DELIVERY OF POSTERIOR ARM BY GRASPING THE WRIST (WHICH IS USUALLY FLEXED AGAINST THE BABY’S CHEST) AND PULLING

STAGE 5 If you reach 2 minutes and the baby is still not out, roll the mother

onto all fours. (Gaskin manoeuvre). By this time, the cumulative odds of success are about 80%. The prognosis is now poor but you have given it every reasonable

shot. Episiotomy doesn’t relieve the obstruction but may make it easier

to accomplish the internal

BLOOD LOSS >500ML

PPH

• Incidence: about 7%. • Mortality: worldwide the biggest obstetric

killer (in developed countries - • #5 behind sepsis, eclampsia,

thromboembolism, and ectopics). • Causes: 80% caused by uterine atony

and/or retained placenta.

PPH MANAGEMENT The O&G texts advise 2L crystalloid stat – but they would, wouldn’t they?

Consider: tranexamic acid, early blood products, permissive hypotension until the bleeding is controlled.

Rub up a contraction (firmly massage the uterus with your fingers on the mother’s belly). The uterus should go hard like a grapefruit.

Catheterize. Emptying the bladder allows space for the uterus to contract. Give 10 IU Syntocinon IM and start an infusion of 40 IU in 1L NS at 250ml/hr. If the bleeding remains brisk, give 500mcg ergotamine IM. If blood loss is severe or patient is shocked, apply bimanual compression(see

next slide). The aim is to fold the uterus over a fist in the anterior fornix. This will be very painful – give analgesic dose ketamine (0.5-1.0 mg/kg) and convey to OT without removing pressure. -

                                             

PRE ECLAMPSIA/ ECLAMPSIAOccurs from the second trimester to about 10 days post deliveryCheck bedside glucose level.Commence IV fluids – patients generally IV depleteControl seizures:  IV diazepam if rapid control of seizure activity is required

MgS04 Loading dose 4 grams IV over 10-20 minutes  Infusion of 1-2 grams per hourIV phenytoin

Control hypertension.IV hydrallazine. - It is important not to administer antihypertensive drugs until intravascular volume replacement has commenced●5-10 mg IV hydrallazine slow bolus may be given. This may be repeated in 20 minutes according to response.If more than 2 boluses are required commence a hydrallazine infusion at 5 mg per hour adjusted according to response.Deliver Baby

PERIMORTEM C SECTION A horrible scenario.. Aesthetically challenging however not technically challenging Principle is do what’s best for mother Important to consider if high likelihood of maternal demise Survival of baby has been reported despite significant delays

(15mins)

PERI-MORTEM C SECTION Perimortem C-section is indicated in maternal arrest for gestation

estimated > 24 weeks. (~ a few fingers over the umbi).  This is roughly the age of fetal viability and correlates with the

time the gravid uterus exerts significant hemodynamic challenges that C-section might reverse. 

C-section should be done in the context of maternal cardio-respiratory arrest, no matter what the presumed aetiology

Perimortem CS should occur at the scene of the arrest – there is not time to “go to theatre”. This is a resuscitative move – like defib or empirical fluids. It needs to be done on the floor, bed or trolley where the woman arrests.

HOW TO… Equipment: one scalpel (disposable will do – 11 blade if you like), gloves,

wall suction, a splash of betadine, a willing assistant to help retract layers Assign roles. • Designate who the infant will be handed off to.• KEEP CPR GOING!• Prep the abdomen and drain the bladderFor non-surgeons, GO MIDLINEExpect a large amount of bleeding.• Incise from the umbilicus to the symphysis pubis.• Avoid the bladder!

HOW TO..

Make a small vertical incision in the lower uterine segment.Lift the uterine wall away with two fingers.Extend the incision superiorly with scissors up to the umbilicusMay encounter the placenta which is commonly anteriorCUT STRAIGHT THROUGH THE PLACENTA This will create more bleedingFind the head.Have someone apply FUNDAL PRESSUREClose!!