Annals of Intensive Care (Dec 2018)

Ischemic and hemorrhagic brain injury during venoarterial-extracorporeal membrane oxygenation

  • Loïc Le Guennec,
  • Clémentine Cholet,
  • Florent Huang,
  • Matthieu Schmidt,
  • Nicolas Bréchot,
  • Guillaume Hékimian,
  • Sébastien Besset,
  • Guillaume Lebreton,
  • Ania Nieszkowska,
  • Pascal Leprince,
  • Alain Combes,
  • Charles-Edouard Luyt

DOI
https://doi.org/10.1186/s13613-018-0475-6
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 10

Abstract

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Abstract Background Structural neurological complications (ischemic stroke and intracranial bleeding) and their risk factors in patients receiving venoarterial-extracorporeal membrane oxygenation (VA-ECMO) are poorly described. Our objective was to describe frequencies, outcomes and risk factors for neurological complications (ischemic stroke and intracranial bleeding) in patients receiving VA-ECMO. Methods Retrospective observational study conducted, from 2006 to 2014, in a tertiary referral center on patients who developed a neurological complication(s) on VA-ECMO. Results Among 878 VA-ECMO-treated patients, 65 (7.4%) developed an ECMO-related brain injury: 42 (5.3%) ischemic strokes and 20 (2.8%) intracranial bleeding, occurring after a median [25th;75th percentile] of 11 [6;18] and 5 [2;9] days of support, respectively. Intracranial bleeding but not ischemic stroke was associated with higher mortality. Multivariable analysis retained only platelet level > 350 giga/L as being associated with ischemic stroke. Female sex, central VA-ECMO and platelets < 100 giga/L at ECMO start were independently associated with intracranial bleeding with respective odds ratios [95% CI] of 2.9 [1.1–7.5], 3.8 [1.1–10.2] and 3.7 [1.4–9.7]. In a nested case–control study, rapid CO2-level change from before-to-after ECMO start also seemed to be associated with intracranial bleeding. Conclusions Neurological events are frequent in VA-ECMO-treated patients. Ischemic stroke is the most frequent, occurs after 1 week on ECMO support, has no specific risk factor and is not associated with higher mortality. Intracranial bleeding occurs earlier and is associated with female sex, central VA-ECMO, low platelet count and rapid CO2 change at ECMO start, and high mortality. Level of evidence This study provides Class IV evidence that central VA-ECMO, low platelet count and rapid CO2 change at ECMO start are associated with intracranial bleeding and high mortality.

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