Use of CFM

The CFM may detect cerebral ischaemia; burst suppression (periods of increasingly prolonged electrical silence) provide an early warning.

Sedation produces a fall in baseline to <5pV, equivalent to burst suppression. This is equivalent to maximum reduction in cerebral VO2 and no further benefit would be gained from additional sedation.

Seizure activity may be detected in patients despite apparently adequate clinical control or where muscle relaxants have been used.

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