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Obstetric patients requiring intensive care
Epworth Symposium 1/9/17
A/Prof Chris MacIsaacMBBS(Hons) FRACP FCICM PhD MHlthServMt
Divisional Director Critical Care & Investigative ServicesDirector ICU, RMH
VMO Intensivist Epworth Freemasons & Melbourne Private
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Clinical Trials of Critically Ill Pregnant Woman
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• ICU admission 2.7/1000 deliveries[0.27%], (1 per 370 deliveries)
• Indications
– Hypertensive disorders of pregnancy
– Obstetric haemorrhage
– Sepsis
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• ICU admission 11.8/1000 deliveries[1.18%], (1 per 370 deliveries)
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Paxton JL, Presneill J, Aitken L. Characteristics of obstetric patients referred to intensive care in an Australian tertiary hospital. The Australian & New Zealand journal of obstetrics & gynaecology. 2014 Oct;54(5):445-9.
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Paxton JL, Presneill J, Aitken L. Characteristics of obstetric patients referred to intensive care in an Australian tertiary hospital. The Australian & New Zealand journal of obstetrics & gynaecology. 2014 Oct;54(5):445-9.
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Paxton JL, Presneill J, Aitken L. Characteristics of obstetric patients referred to intensive care in an Australian tertiary hospital. The Australian & New Zealand journal of obstetrics & gynaecology. 2014 Oct;54(5):445-9.
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The Maternal Mortality Ratio (MMR) from 2011 to 2015 was
8.9 per 100,000 women who gave birth.
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General Principles of Care in the ICU
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• Physiological changes make recognition of pathophysiology challenging
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• Airway maybe more challenging
• Vena caval obstruction – lateral position
• Nutrition complex
• DVT risk increased
• Highly emotionally charged and stressful for patients, families & caregivers
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Physiological Targets
• Limited information
• Extrapolation from other patient groups
– “Adequate” PaO2, >90 mmHg
– ? Match maternal alkalosis, PaCo2 35-40
– Sedation – BZD, opiates & propofol
– MAP > 65 mmHg
– Hb > 70 g/L unless bleeding
– DVT prophylaxis
– Stress ulcer prophylaxis
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• Preeclampsia is one of several hypertensive disorders in pregnancy (HDP)
• It is classically defined by the development of hypertension plus proteinuria, after 20 weeks’ gestation
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Treatment principals Pre-eclampsia
• Delivery definitive
• Other considerations
– Fetal lung maturation
– MgSo4
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Treatment principals Pre-eclampsia
• Anti-Hypertensives
– Aim SBP 130-160
– DPB 80-90
– Iv hydralazine, labetalol
– (NOT ACEI, atenolol)
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PPH
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PPH: Definition
• Loss > 1L c-section
• Loss > 5oo ml vaginal
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PPH: Risk Factors
• Abnormal placental implantation
• Multiple Pregnancy
• Prev PPH
• Obesity
• C-section
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PPH: Causes
• Atony Tone
• Retained products/abnormalimplantation Tissue
• Trauma Trauma
• Coagulopathy Thrombin
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Effective Management PPH involves
• Recognition
• Communication
• Resuscitation
• Monitoring
• Investigation and directed treatment
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Recognition
• ‘Critical bleeding’ may be defined as major haemorrhagethat is life threatening and likely to result in the need for massive transfusion.
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• VITAL SIGNS ARE VITAL
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Crisis Resource Management
• Awareness & attention
• Decision making
• Communication
• Task management
• Leadership & followership
• Teamwork
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Practical approach to Critical bleeding
• Call for help
– Obstetric back up
– Anaesthetic back up
– Alert Blood Bank by phone
– Alert Theatre
• If signs of shock (e.g. SBP <80) give blood
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Management of bleeding: Resuscitation
• Big lines
– Preferably 2 x 14-16G peripheral jelcos
– Flow = Change in PressureResistance
– Resistance = 8 x viscosity x lengthπ x r4
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Catheter Flow Rate ml/min
Jelco 20G 60
Jelco 18G 100
Jelco 16G 225
Jelco 14G 315
CVC (18G) 16.6
CVC (16G) 38.3
Sheath (9 Fr) 550
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In a shocked patient Activate a Massive Transfusion
Protocol
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In haemorrhagic shock early use of FFP and Platelets is associated with reduced mortality
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Lethal Triad
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ICU Care of Obstetric Haemorrhage
• Keep patient ventilated while they are cold, acidotic and risk of ongoing bleeding
• Central line; monitoring, inotropes, infusions
• Arterial Line; continuous BP reading & ABG
• IDC
• Pulse oximetry & continuous ECG
• Major concern is “Has the bleeding stopped?”
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Ongoing monitoring
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Ongoing aims
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Monitor for adequate perfusion
• MAP > 65 mmHg, SBP <120 mmHg• Urine output > 0.5 ml/kg/hr• Peripheral temperature• Lactate < 2 mmol/L• Hb > 8
• Post initial resuscitation avoid non blood products• Diuretics frequently required
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Other management
• Keep warm
• Watch ionised calcium
• Specific therapies to contract uterus– Oxytocin, ergometrine and prostaglandins
• Sedation
• Stress ulcer prophylaxis
• Breastfeeding
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AIMS IN ICU
• Warm & well perfused
• INR < 1.5, APTT < 40, FIB > 2.0, Hb > 8
• If still bleeding, mechanical cause
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Difficult bleeding
• Return to theatre ? Surgical assistance
• Tie off internal iliacs
• Consider hysterectomy
• Pack pelvis
• Consider radiological Embolisation
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Difficult bleeding
Activated RecombinantFactor VIIA (Novoseven)
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Non-obstetric Traumatic Haemorrhagein a Pregnant patient
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Mendez-Figueroa H et al. Trauma in pregnancy: an updated systematic review. Am J ObstetGynecol 2013;209(1):1–10
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Domestic violence in Australia (intimate partner
violence or family violence)
• Domestic violence may increase in pregnancy
• Estimated 1% - 20% Australian women experience violence in pregnancy / postpartum
Department of Health | 7.7 Domestic violence Clinical practice guidelines antenatal care - module 1 http://www.health.gov.au
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• Outcomes for those giving birth immediately were poor
– increased risk of
• placental abruption + other antepartum haemorrhage
• preterm birth
• caesarean section
• perinatal death
• Women who remained undelivered following MVA (96%) had similar pregnancy outcomes to women not in MVAs
Motor trauma in pregnancy, NSW, Australia
Vivian-Taylor J, et al. Motor vehicle accidents during pregnancy: a population-based study. BJOG. 2012 Mar;119(4):499-503
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“…When caring for the pregnant patient who has suffered trauma, the primary management goal is
to stabilize the condition of the mother, as fetal outcomes are
directly correlated with early and aggressive maternal
resuscitation…”
Mendez-Figueroa H et al. Trauma in pregnancy: an updated systematic review. 2013;209(1):1–10
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RMH Trauma Guidelines
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Mendez-Figueroa H et al. Trauma in pregnancy: an updated systematic review. 2013;209(1):1–10
Considerations in pregnancy trauma cases
• Thoracostomy tubes placed 1-2 intercostal
spaces above usual fifth intercostal space
landmark to avoid abdominal placement
• In second- and third-trimester, consider delivery
if total affected body surface burn area ≥ 50%
• Focused assessment with sonography for trauma
is reliable during pregnancy
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Sepsis
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Term Definition from 1991 consensus conference
Infection Microbiological phenomenon characterized by
an inflammatory response to the presence of
micro organisms or the invasion of normally
sterile host tissue by those organisms
Bacteremia The presence of viable bacteria in blood
Systemic Inflammatory
Response Syndrome
(SIRS)
The systemic response to a variety of severe
clinical insults. The response is manifest by 2
or more of the following:
Temperature > 38oC or < 36
oC
Heart Rate > 90 beats/min
Respiratory Rate > 20
breaths/min or PaCO2 <
32 torr
WBC > 12000 cells/mm3 or >
10% immature forms
Sepsis SIRS in response to infection
Severe Sepsis Sepsis associated with organ dysfunction
Septic Shock Sepsis with hypotension, despite adequate
fluid resuscitation, along with the presence of
perfusion abnormalities.
Multiple organ
dysfunction syndrome
(MODS)
Presence of altered organ function in an
acutely ill patient such that homeostasis
cannot be maintained without intervention
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• Sepsis should be defined as life-
threatening organ dysfunction caused by
a dysregulated host response to
infection
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• Adult patients with suspected infection can be
rapidly identified as being more likely to have
poor outcomes typical of sepsis if they have at
least 2 of the following clinical criteria that
together constitute a new bedside clinical
score termed quick SOFA (qSOFA):
• respiratory rate of 22/min or greater
• altered mentation, or
• systolic blood pressure of 100mmHg or less.
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• Single Centre
• 263 patients
• Severe sepsis or septic shock
• SBP < 90 or
• Lactate > 4 mmol/l
Rivers, E., Nguyen, B., Havstad, S., Ressler, J., Muzzin, A., Knoblich, B., Peterson, E.
and Tomlanovich, M. (2001), Early goal-directed therapy in the treatment of severe sepsis
and septic shock, N Engl J Med, 345, 1368-1377.
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Standard therapy
• CVP 8 – 12 mmHg
• MAP ≥ 65 mmHg
• Urine output ≥ 0.5 ml/kg/hr
Rivers, E., Nguyen, B., Havstad, S., Ressler, J., Muzzin, A., Knoblich, B., Peterson, E.
and Tomlanovich, M. (2001), Early goal-directed therapy in the treatment of severe sepsis
and septic shock, N Engl J Med, 345, 1368-1377.
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EGDT™
Dobutamine ifMAP ≥ 65 mmHg
$2001 2
3
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• In-hospital mortality
• Standard 46.5%
• EGDT 30.5%
P = 0.009
Rivers, E., Nguyen, B., Havstad, S., Ressler, J., Muzzin, A., Knoblich, B., Peterson, E.
and Tomlanovich, M. (2001), Early goal-directed therapy in the treatment of severe sepsis
and septic shock, N Engl J Med, 345, 1368-1377.
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3723 patients at 138 hospital in 7 countries
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Treatment of Sepsis
• Resuscitation
• Antibiotics
• Source control
• Organ support
• Specific therapies
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30.7%35.3%
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Retrospective
study of 2731
patients with
septic shock
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Survival
82.7%
Survival
42.0%
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• The most common organisms identified in pregnant
women dying from sepsis are Lancefield group A beta-
haemolytic Streptococcus and E.Coli.
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• amoxy/ampicillin 2 g IV, 6-hourly
• gentamicin IV
• metronidazole 500 mg IV, 12-hourly.
• TAZOCIN (Piperacillin/tazobactam)
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Conclusions
• Critically ill obstetric patient are scary
• Robust young physiology helps
• Quick action and teamwork saves lives
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