• Journal of critical care · Apr 2021

    Review

    Neuroinflammation, neuronal damage or cognitive impairment associated with mechanical ventilation: A systematic review of evidence from animal studies.

    • Giovanni Giordano, Francesco Pugliese, and Federico Bilotta.
    • Department of Anaesthesia and Intensive Care, Sapienza University of Rome, Roma, Italy. Electronic address: gi.giordano@policlinicoumberto1.it.
    • J Crit Care. 2021 Apr 1; 62: 246-255.

    PurposeLong-term cognitive impairment is a complication of critical illness survivors. Beside its lifesaving role, mechanical ventilation has potential complications. The aim of this study is to systematically review the evidence collected in animal studies that correlate mechanical ventilation with neuroinflammation, neuronal damage and cognitive impairment.MethodsWe searched MEDLINE and EMBASE databases for studies published from inception until August 31st, 2020, that enrolled mechanically ventilated animals and reported on neuroinflammation or neuronal damage markers changes or cognitive-behavioural impairment.ResultsOf 5583 studies, 11 met inclusion criteria. Mice, rats, pigs were used. Impact of MV: 4 out of 7 studies reported higher neuroinflammation markers in MV-treated animals and 3 studies reported no differences; 7 out of 8 studies reported a higher neuronal damage and 1 reported no differences; 2 out of 2 studies reported cognitive decline up to 3 days after MV. Higher Tidal volumes are associated with higher changes in brain or serum markers.ConclusionPreclinical evidence suggests that MV induces neuroinflammation, neuronal damage and cognitive impairment and these are worsened if sub-optimal MV settings are applied. Future studies, with appropriate methodology, are necessary to evaluate for serum monitoring strategies.Trial Registration NumberCRD42019148935.Copyright © 2020 Elsevier Inc. All rights reserved.

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