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Amplitude integrated electroencephalography
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<h2 id="interpretation-of-the-aeeg">Interpretation of the aEEG</h2> <p>The CFM readout offers an integrated trace in one pane and a non-integrated trace in another pane (see image). Modern machines give a readout for each <a href="/facts/Cerebral_hemisphere/H81aw2Qy">hemisphere</a> corresponding to the positions of electrodes placed on the patient's head. The characteristics of the CFM include the 'baseline' which should be more than 5 μV, the upper limit of the trace which should be more than 10 μV, and the presence of '<a href="/facts/Sleep_wake_cycle/rwQh0ClJ">sleep wake cycling</a>' whereby the trace is expected to narrow and broaden over time. Seizures appear on the trace as regions of high activity with a raised and compacted trace in the aEEG pane; this would correspond to high-amplitude, repetitive waveforms in the non-integrated pane. A low-amplitude or 'suppressed' trace is prognostically concerning as it indicates abnormally low brain activity. A further possible pattern is a '<a href="/facts/Burst_suppression/5bzUa2WV">burst suppression</a>' trace which consists of a low-amplitude signal interspersed with periods of high activity on the aEEG readout. This also carries a poor prognosis.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Electroencephalogram/XGvpcBl5">Electroencephalogram(EEG)</a></li> <li><a href="/facts/Bispectral_index/gf8S2e3x">Bispectral index</a></li> <li><a href="/facts/Epileptic_seizure/zuIrQyze">Epileptic seizure</a></li> <li><a href="/facts/Hypoxic_ischaemic_encephalopathy/rKLaKRC3">Hypoxic ischaemic encephalopathy</a></li> <li><a href="/facts/Therapeutic_hypothermia/8KlMUuaf">Therapeutic hypothermia</a></li> <li><a href="/facts/Pressure_reactivity_index/UHGXKjgX">Pressure reactivity index</a></li> <li><a href="/facts/Neonatal_seizure/pbYySksj">Neonatal seizure</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Maynard D, Prior P, Scott D. Device for continuous monitoring of cerebral activity in resuscitated patients. Br Med J. 1969 Nov 29;4(5682):545-6. PMID 5354856 [1] <a href="/wiki/PMID_(identifier)" target="_blank">/wiki/PMID_(identifier)</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Azzopardi D. TOBY Cerebral Function Monitoring: Addition to CFM handbook for users of the Olympic CFM 6000. Imperial College London, 2004. <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>