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Region Hovedstaden - en del af Københavns Universitetshospital
E-pub ahead of print

Perioperative hyperoxia and post-operative cardiac complications in adults undergoing non-cardiac surgery: Systematic review protocol

Publikation: Bidrag til tidsskriftReviewForskningpeer review

DOI

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BACKGROUND: Oxygen therapy is used liberally for all patients undergoing anaesthesia. Recent studies have raised concerns that it may not be without complications when arterial oxygen concentrations reach supranormal concentrations (hyperoxia). Studies of oxygen therapy have raised concerns that the risk of myocardial injury and infarction is elevated in patients with hyperoxia due to vasoconstriction and formation of reactive oxygen species. Due to lack of symptoms or silent ischaemia, post-operative myocardial injury may be missed clinically. In some studies, perioperative hyperoxia has been linked to increased long-term mortality, but cardiac complications are sparsely evaluated. The aim of this review is to summarize current evidence to assess the risk and benefits of perioperative hyperoxia on post-operative cardiac complications.

METHODS: This systematic review will include meta-analyses and Trial Sequential Analyses. We will include randomized clinical trials with patients undergoing non-cardiac surgery if the allocation separates patients into a target of either higher (above 0.60) or lower (below 0.40) inspired oxygen fraction. To minimize the risk of systematic error, we will assess the risk of bias of the included trials using the Cochrane Risk of Bias Tool. The overall quality of evidence for each outcome will be assessed with the Grading of Recommendation, Assessment, Development and Evaluation (GRADE).

DISCUSSION: This systematic review will provide data on a severe, albeit rare, potential risk of oxygen therapy. We will do a trial sequential analysis to assess the robustness of results as well as help estimate the required patient size for future clinical trials.

OriginalsprogEngelsk
TidsskriftActa anaesthesiologica Scandinavica
ISSN0001-5172
DOI
StatusE-pub ahead of print - 17 apr. 2018

ID: 53659187