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Neuroprognostication Under ECMO After Cardiac Arrest: Are Classical Tools Still Performant?
Nawfel Ben-Hamouda1,2, Zied Ltaief3,4, Matthias Kirsch4,5
1Department of Adult Intensive Care Medicine, Lausanne University Hospital, Rue du Bugnon 46, 1011, Lausanne, Switzerland. nawfel.ben-hamouda@chuv.ch.
Neurocritical Care
|May 9, 2022
Summary
Neuroprognostication in comatose patients after cardiac arrest (CA) is challenging with extracorporeal membrane oxygenation (ECMO). However, standard predictors of poor neurological outcome show comparable performance in ECMO patients, particularly when using multiple criteria.
Area of Science:
- Neurology
- Critical Care Medicine
- Cardiology
Background:
- International guidelines recommend multimodal neuroprognostication for comatose patients post-cardiac arrest (CA).
- Extracorporeal membrane oxygenation (ECMO) can complicate prognostication due to prolonged sedation and altered biomarkers.
- This study evaluates standard neuroprognostic predictors in CA patients undergoing ECMO.
Purpose of the Study:
- To assess the performance of established neuroprognostic predictors in comatose patients after CA who are undergoing ECMO.
- To compare the accuracy of these predictors between patients with and without ECMO support.
- To determine if multimodal prognostication remains reliable in the context of ECMO.
Main Methods:
- Retrospective analysis of a registry of comatose adult CA patients.
- Comparison of neuroprognostic test performance (pupillary reflex, EEG, SSEP, NSE) between ECMO and non-ECMO groups.
- Analysis included mortality and poor functional outcome (CPC 3-5) as endpoints.
Main Results:
- Patients on ECMO had worse functional outcomes (74% CPC 3-5) and higher mortality (60%) compared to non-ECMO patients.
- The specificity of individual prognostic factors (pupillary reflex, EEG, SSEP, myoclonus) for poor outcome was high (92-100%) in both groups.
- The combination of at least two poor outcome criteria showed excellent specificity (99.3% in non-ECMO, 100% in ECMO).
Conclusions:
- Neuroprognostic factor performance appears comparable between CA patients with and without ECMO.
- The combination of at least two poor outcome criteria is a valid prognostic approach across both patient groups.
- Further prospective studies are warranted for definitive conclusions.
