Comparison of changes in electroencephalographic measures during induction of general anaesthesia: influence of the gamma frequency band and electromyogram.

Slides:

Advertisements

Similar presentations

Ketamine increases the frequency of electroencephalographic bicoherence peak on the α spindle area induced with propofol K. Hayashi, N. Tsuda, T. Sawa,

Advertisements

Global field synchrony during general anaesthesia

Color density spectral array of bilateral bispectral index system: Electroencephalographic correlate in comatose patients with nonconvulsive status epilepticus

M.R.J. Sury, A. Worley, S.G. Boyd British Journal of Anaesthesia

Relationship between Bispectral Index, electroencephalographic state entropy and effect-site EC50 for propofol at different clinical endpoints M. Iannuzzi,

Touch contamination levels during anaesthetic procedures and their relationship to hand hygiene procedures: a clinical audit A.F. Merry, T.E. Miller,

Human neural correlates of sevoflurane-induced unconsciousness

Pharmacokinetic profile of epidurally administered methylnaltrexone, a novel peripheral opioid antagonist in a rabbit model D.B. Murphy, H. El Behiery,

The effect of bi-level positive airway pressure mechanical ventilation on gas exchange during general anaesthesia Yu G , Yang K , Baker A.B. , Young.

Time delay of electroencephalogram index calculation: analysis of cerebral state, bispectral, and Narcotrend indices using perioperatively recorded electroencephalographic.

Proof of concept evaluation of the electroencephalophone as a discriminator between wakefulness and general anaesthesia J Glen, B Porr, R Hamilton, L.

Facial muscle activity, Response Entropy, and State Entropy indices during noxious stimuli in propofol–nitrous oxide or propofol–nitrous oxide–remifentanil.

E. Olofsen, J.W. Sleigh, A. Dahan British Journal of Anaesthesia

Explaining Entropy responses after a noxious stimulus, with or without neuromuscular blocking agents, by means of the raw electroencephalographic and.

G Turner, M.J. Goldacre, T Lambert, J.W. Sear

Comparison of coagulation and blood loss during anaesthesia with inhaled isoflurane or intravenous propofol N.L. Law, K.F.J. Ng, M.G. Irwin, J.S.F. Man

S. Kreuer, J. Bruhn, R. Larsen, M. Hoepstein, W. Wilhelm

EEG variables as measures of arousal during propofol anaesthesia for general surgery in children: rational selection and age dependence C. Jeleazcov,

Preoxygenation: a comparison of three different breathing systems

Bilateral bispectral index monitoring during and after electroconvulsive therapy compared with magnetic seizure therapy for treatment-resistant depression

Codeine phosphate in paediatric medicine

EEG signal processing in anaesthesia

Behaviour of spectral entropy, spectral edge frequency 90%, and alpha and beta power parameters during low-dose propofol infusion P. Mahon, B.R. Greene,

Attenuation of high-frequency (30–200 Hz) thalamocortical EEG rhythms as correlate of anaesthetic action: evidence from dexmedetomidine G. Plourde, F.

Pain after orthopaedic surgery: differences in patient reported outcomes in the United States vs internationally. An observational study from the PAIN.

Validation of the index of consciousness during sevoflurane and remifentanil anaesthesia: a comparison with the bispectral index and the cerebral state.

Spectral entropy measurement of patient responsiveness during propofol and remifentanil. A comparison with the bispectral index† Vanluchene A.L.G. ,

Sugammadex administration results in arousal from intravenous anaesthesia: a clinical and electroencephalographic observation T. Chazot, G. Dumont, M.

Pituitary disease and anaesthesia

Association of airway obstruction, sleep, and phasic abdominal muscle activity after upper abdominal surgery† M.Q. Rahman, R.N. Kingshott, P. Wraith,

Detection of awareness in surgical patients with EEG-based indices—bispectral index and patient state index†‡ G. Schneider, A.W. Gelb, B. Schmeller,

Awareness and the EEG power spectrum: analysis of frequencies

EEG-controlled closed-loop dosing of propofol in rats

Influence of nociceptive stimulation on analgesia nociception index (ANI) during propofol–remifentanil anaesthesia M. Gruenewald, C. Ilies, J. Herz,

J.E. Hall, T.D. Uhrich, T.J. Ebert British Journal of Anaesthesia

B. McNamara, J. Ray, D. Menon, S. Boniface

Comparison of Bispectral Index and Entropy values with electroencephalogram during surgical anaesthesia with sevoflurane† A.J. Aho, K. Kamata, V. Jäntti,

Expertise in practice: an ethnographic study exploring acquisition and use of knowledge in anaesthesia A. Smith, D. Goodwin, M. Mort, C. Pope British.

Does bispectral analysis add anything but complexity

Surface electromyogram of inspiratory muscles: a possible routine monitoring tool in the intensive care unit M. Schmidt, L. Chiti, F. Hug, A. Demoule,

G. Park, M. Lane, S. Rogers, P. Bassett British Journal of Anaesthesia

Patient state index vs bispectral index as measures of the electroencephalographic effects of propofol M Soehle, M Kuech, M Grube, S Wirz, S Kreuer,

Bispectral index is related to the spread of spinal sensory block in patients with combined spinal and general anaesthesia R Iida, K Iwasaki, J Kato,

Anaesthesia for awake craniotomy—evolution of a technique that facilitates awake neurological testing A. Sarang, J. Dinsmore British Journal of Anaesthesia

Comparison of 1% and 2% lidocaine epidural anaesthesia combined with sevoflurane general anaesthesia utilizing a constant bispectral index A Shono, S.

Post-operative recovery after inguinal herniotomy in ex-premature infants: comparison between sevoflurane and spinal anaesthesia J.M. Williams, P.A.

H.M. Soliman, C. Mélot, J.-L. Vincent British Journal of Anaesthesia

Relationship between approximate entropy and visual inspection of irregularity in the EEG signal, a comparison with spectral entropy A. Anier, T. Lipping,

Tuning to Natural Stimulus Dynamics in Primary Auditory Cortex

J. -H. Baumert, M. Hein, K. E. Hecker, S. Satlow, J. Schnoor, R

Frequency band of EMG in anaesthesia monitoring

Hyperventilation-induced hypocapnia changes the pattern of electroencephalographic bicoherence growth during sevoflurane anaesthesia K. Hayashi, M. Fujikawa,

Wu A , Drummond G.B. British Journal of Anaesthesia

M Kodaka, Y Okamoto, F Handa, J Kawasaki, H Miyao

The Ageing Brain: Age-dependent changes in the electroencephalogram during propofol and sevoflurane general anaesthesia P.L. Purdon, K.J. Pavone, O.

J.H.P. Friesen British Journal of Anaesthesia

O. Tirel, E. Wodey, R. Harris, J.Y. Bansard, C. Ecoffey, L. Senhadji

C. Menigaux, B. Guignard, F. Adam, D.I. Sessler, V. Joly, M. Chauvin

Review of management of purpura fulminans and two case reports

Raw EEG characteristics, bispectral index, and suppression ratio variations during generalized seizure in electroconvulsive therapy A Ntahe, G Fournis,

Extreme value theory applied to postoperative breathing patterns

Transient decreases in Bispectral Index without associated changes in the level of consciousness during photic stimulation in an epileptic patient N.

Reduction of vasopressor requirement by hydrocortisone administration in a patient with cerebral vasospasm J.A. Alhashemi British Journal of Anaesthesia

Systematic review of the QoR-15 score, a patient- reported outcome measure measuring quality of recovery after surgery and anaesthesia J. Kleif, J. Waage,

Relationship between Bispectral Index, electroencephalographic state entropy and effect-site EC50 for propofol at different clinical endpoints M. Iannuzzi,

Skin conductance monitoring compared with bispectral index® monitoring to assess emergence from general anaesthesia using sevoflurane and remifentanil

The suppression of spinal F-waves by propofol does not predict immobility to painful stimuli in humans† J.H. Baars, S Tas, K.F. Herold, D.A. Hadzidiakos,

Monitoring level of sedation with bispectral EEG analysis: comparison between hypothermic and normothermic cardiopulmonary bypass† D. Schmidlin, P. Hager,

Closed-loop control of propofol anaesthesia using bispectral index™: performance assessment in patients receiving computer-controlled propofol and manually.

Analysis of pharmacodynamic interaction of sevoflurane and propofol on bispectral index during general anaesthesia using a response surface model J.C.

Presentation transcript:

Comparison of changes in electroencephalographic measures during induction of general anaesthesia: influence of the gamma frequency band and electromyogram signal J.W. Sleigh, D.A. Steyn-Ross, M.L. Steyn-Ross, M.L. Williams, P. Smith British Journal of Anaesthesia Volume 86, Issue 1, Pages 50-58 (January 2001) DOI: 10.1093/bja/86.1.50 Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

Fig 1 Comparison of typical power spectra of the raw EEG signal with that of the first time-derivative of the same 1 s segment of the EEG signal in an awake patient. The spectral power density of the raw EEG (left) is in units of (μV)2 Hz−1 and that of the first derivative (right) in units of (μVs−1)2 Hz−1. The signal has been digitally band-pass filtered 0.1 to 47 Hz. British Journal of Anaesthesia 2001 86, 50-58DOI: (10.1093/bja/86.1.50) Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

Fig 2 Pictorial representation of how the power spectrum of the observed EEG signal (EEGscalp) consists of the sum of power spectra of the frontalis EMG signal (EMGfrontalis) and that of the true EEG signal (EEGtrue). British Journal of Anaesthesia 2001 86, 50-58DOI: (10.1093/bja/86.1.50) Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

Fig 3 Example of the power spectra of the submental EMG signal and scalp EEG from an awake patient. The EMGfrontalis signal cannot be measured directly, but is in fact the same EMGsubmental signal suitably scaled to give a diagrammatic representation of the various ratios as described in the text. The unit of spectral power is (μV)2 Hz−1. British Journal of Anaesthesia 2001 86, 50-58DOI: (10.1093/bja/86.1.50) Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

Fig 4 Graphs showing typical changes in EEG indices (BIS, SE50d, SE50d30Hz and BetaRatio) with time for a single volunteer. TLOC is the time of loss of consciousness and R is the time of reawakening. British Journal of Anaesthesia 2001 86, 50-58DOI: (10.1093/bja/86.1.50) Copyright © 2001 British Journal of Anaesthesia Terms and Conditions

Fig 5 Typical changes in various EEG variables in a single patient during induction of anaesthesia. The vertical dotted line in each graph indicates the time of loss of consciousness. BIS, BetaRatio and SynchFastSlow are dimensionless ratios. The units of EMG power (d) are dB relative to 1(μV)2 Hz−1. The total power is the log10 of the volume under the bispectral surface from 0.5 to 47 Hz, and the high power is the logarithm of the volume under the bispectral surface from 40 to 47 Hz. See text for detailed description of the calculation of each variable. British Journal of Anaesthesia 2001 86, 50-58DOI: (10.1093/bja/86.1.50) Copyright © 2001 British Journal of Anaesthesia Terms and Conditions