Correlation of the A-Line™ ARX index with acoustically evoked potential amplitudeâ€

The version of the A-Line™ monitor used in this study does not exclude contaminated MLAEP signals. Previous publications involving this version of the A-Line™ monitor (as opposed to the newer A-Line/2™ monitor series) should be reassessed in the light of these findings. Before exclusively MLAEP-based monitors can be evaluated as suitable monitors of depth of anaesthesia, it is essential to ensure that inbuilt validity tests eliminate contaminated MLAEP signals.