ECMO Literature Summaries
Peek GJ, et al; CESAR trial collaboration. Efficacy and economic assessment of conventional ventilatory support versus extracorporeal membrane oxygenation for severe adult respiratory failure (CESAR): a multicentre randomised controlled trial. Lancet. 2009 Oct 17;374(9698):1351-63.PMID: 19762075.
- n = 180
- randomised to consideration for ECMO (90) -> 68 received ECMO vs conventional treatment (90)
- inclusion criteria: adults, reversible respiratory failure, Murray score of >3.0 (PaO2/FiO2 ratio, PEEP, compliance, CXR appearance, FiO2 1.0), pH 0.8, ventilation > 7 days, contraindications to anticoagulation, contraindication to continuation to active treatment.
- primary outcome = death or severe disability @ 6 months
- secondary outcomes = duration of ventilation, use of HFOV or jet ventilation, use of NO, prone positioning, steroids, duration of ICU stay, duration of hospital stay, method of ECMO, duration of ECMO, blood flow, sweep flow.
- intention to treat analysis
- data on resource use and economic outcomes (quality-adjusted life years) collected
- ECMO patients -> Leicester
- conventional ventilation patients -> tertial intensive care units
- all inward ECMO patients done by ECMO team -> but did not provide ECMO
- 85 patient arrived in Glenfield (5 died pre or during transfer) -> 17 treated with gentle ventilation of who 14 survived (82%)
- 68 treated with ECMO of whom 42 survived (63%)
- only 68 of the 90 (75%) of the patients considered for ECMO received it
- survival in the non-ECMO consideration group was 47%.
- important differences between the groups:
(1) almost a quarter of the consideration for ECMO group did not receive ECMO
(2) MARS = molecular albumin recirculating system offered at Leicester to those transferred
(3) steroids used at Leicester in consideration for ECMO group
(4) ARDS net ventilation used more in patients transferred to Leicester
- 12 hour window in Leicester to optimize patient -> if failed -> ECMO
-> concluded that ECMO produced increased survival and minimises severe disability, and is cost effective
-> relative risk of death or severe disability @ 6 month in ECMO vs control = 0.69 (NNT = 5)
-> strengths: pragmatic
-> weakness: should have only enrolled patients for ECMO once arrived in Leicester!
Australia and New Zealand Extracorporeal Membrane Oxygenation (ANZ ECMO) Influenza Investigators, Davies A, et al. Extracorporeal Membrane Oxygenation for 2009 Influenza A(H1N1) Acute Respiratory Distress Syndrome. JAMA. 2009 Nov 4;302(17):1888-95. PMID: 19822628.
- observational study
- June – August 2009
- n = 201 (requiring mechanical ventilation)
- 30% received (68)
- mortality rate in ECMO group = 21% (lower than previous documented)
- mortality in non-ECMO group = 13%
- Conclusion: Uee of ECMO associated with low rates of mortality in severe hypoxia in H1N1
Mitchell MD, Mikkelsen ME, Umscheid CA, Lee I, Fuchs BD, Halpern SD. A systematic review to inform institutional decisions about the use of extracorporeal membrane oxygenation during the H1N1 influenza pandemic. Crit Care Med. 2010 Jun;38(6):1398-404. PMID: 20400902.
- Conclusion: insufficient evidence for ECMO use among patients with H1N1.
Chris is an Intensivist and ECMO specialist at the Alfred ICU in Melbourne. He is also a Clinical Adjunct Associate Professor at Monash University. He is a co-founder of the Australia and New Zealand Clinician Educator Network (ANZCEN) and is the Lead for the ANZCEN Clinician Educator Incubator programme. He is on the Board of Directors for the Intensive Care Foundation and is a First Part Examiner for the College of Intensive Care Medicine. He is an internationally recognised Clinician Educator with a passion for helping clinicians learn and for improving the clinical performance of individuals and collectives.
After finishing his medical degree at the University of Auckland, he continued post-graduate training in New Zealand as well as Australia’s Northern Territory, Perth and Melbourne. He has completed fellowship training in both intensive care medicine and emergency medicine, as well as post-graduate training in biochemistry, clinical toxicology, clinical epidemiology, and health professional education.
He is actively involved in in using translational simulation to improve patient care and the design of processes and systems at Alfred Health. He coordinates the Alfred ICU’s education and simulation programmes and runs the unit’s education website, INTENSIVE. He created the ‘Critically Ill Airway’ course and teaches on numerous courses around the world. He is one of the founders of the FOAM movement (Free Open-Access Medical education) and is co-creator of litfl.com, the RAGE podcast, the Resuscitology course, and the SMACC conference.
His one great achievement is being the father of three amazing children.
On Twitter, he is @precordialthump.
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