British journal of anaesthesia
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Review Meta Analysis
Intrathecal hydrophilic opioids for abdominal surgery: a meta-analysis, meta-regression, and trial sequential analysis.
Intrathecal hydrophilic opioids show an IV morphine sparing effect and likely dose-related respiratory depression.
pearl -
Review
Causal inference in perioperative medicine observational research: part 1, a graphical introduction.
Graphical models have emerged as a tool to map out the interplay between multiple measured and unmeasured variables, and can help strengthen the case for a causal association between exposures and outcomes in observational studies. In Part 1 of this methods series, we will introduce the reader to graphical models for causal inference in perioperative medicine, and set the framework for Part 2 of the series involving advanced methods for causal inference.
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Observational Study
Frontal electroencephalogram reveals emergence-like brain activity occurring during transition periods in cardiac surgery.
Cardiac surgery has one of the highest incidences of intraoperative awareness. The periods of initiation and discontinuation of cardiopulmonary bypass could be high-risk periods. Certain frontal EEG patterns might plausibly occur with unintended intraoperative awareness. This study sought to quantify the incidence of these pre-specified patterns during cardiac surgery. ⋯ NCT02976584.