Anaesthesia Coffee Break Does BIS / ENTROPY really prevent awareness under anaesthesia?
Oct 31, 2021
Dive deep into BIS monitoring to prevent awareness under anaesthesia, exploring how it translates EEG and EMG signals. Learn about the impacts of neuromuscular blocking and factors that influence BIS values like medications and conditions. Hear about mixed trial results on BIS effectiveness and practical applications for high-risk patients. Discover the importance of integrating BIS with clinical signs and other monitoring tools while appreciating the ethical considerations in trials. A comprehensive look at a vital anaesthesia topic!
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Writing Down Clinical Wins For Confidence
- Lahiru shares being the sole ALS-qualified clinician in a resus and the relief when the patient survived.
- He now keeps a list of best clinical moments to boost confidence before exams.
EEG Is Summed Cortical Activity
- EEG is the summed excitatory and inhibitory post-synaptic potentials of pyramidal cells recorded at microvolt scale.
- Remember EEG reflects summation not propagated action potentials, unlike ECG.
Remember EEG Frequency Bands
- Classify EEG by frequency bands: delta <4 Hz, theta 4–7 Hz, alpha 7–13 Hz, beta 14–30 Hz, and gamma >30 Hz.
- Use a 4-8-12 rough rule to recall the bands for exam purposes.