Comparison of two depth of anaesthesia monitors during general anaesthesia

Electrophysiological and clinical assessment

C. S. Molnár, Z. S. Kovács, E. Simon, J. Gál, B. Mikos, B. Fülesdi

Research output: Contribution to journalArticle

Abstract

Cerebral state monitor (CSM) is a recently developed anaesthesia depth monitor based on EEG measurement. Medline search confirmed that the accuracy of this monitor has already been compared with BIS monitoring; however, we did not find any studies comparing CSM monitor with AEP monitoring. Therefore, the aim of our study was to investigate the correlation between AAI using AEP monitor and CSI (cerebral state index) using CSM monitor. Methods: Prospective, observational study involving 39 ASA I-III patients undergoing lumbar discus hernia operation. Simultaneous registration of CSI and AAI was performed during general anaesthesia. The identical values were off-line analysed. Additionally in 20 patients parallel registration of CSI and AAI was undertaken while anaesthesia was guided based on routine clinical signs. Results: While analysing the data in the superficial, ideal and deep anaesthesia zones, we found that a relationship between CSI and AAI is weak. Our patients spent roughly the half of the clinical anaesthesia in the ideal zone based on the AAI index and less than 50% based on CSI. Almost one fifth of clinical anaesthesia based on AAI and nearly 40% based on CSI was spent in the deep anaesthesia zones. A superficial anaesthesia has been detected in 27% of time based on AAI and 17% based on CSI. Conclusions: CSI and AAI weakly correlated to each other. Depth of anaesthesia monitors may be useful in detecting patients who spend valuable time within the deep anaesthetic zone.

Original languageEnglish
Pages (from-to)111-117
Number of pages7
JournalActa Physiologica Hungarica
Volume99
Issue number2
DOIs
Publication statusPublished - Jun 1 2012

Fingerprint

General Anesthesia
Anesthesia
Consciousness Monitors
Hernia
Observational Studies
Anesthetics
Electroencephalography
Prospective Studies

Keywords

  • Anaesthesia depth monitor
  • Cerebral state index
  • Cerebral state monitor
  • Depth of anaesthesia
  • EEG

ASJC Scopus subject areas

  • Physiology (medical)

Cite this

Comparison of two depth of anaesthesia monitors during general anaesthesia : Electrophysiological and clinical assessment. / Molnár, C. S.; Kovács, Z. S.; Simon, E.; Gál, J.; Mikos, B.; Fülesdi, B.

In: Acta Physiologica Hungarica, Vol. 99, No. 2, 01.06.2012, p. 111-117.

Research output: Contribution to journalArticle

Molnár, C. S. ; Kovács, Z. S. ; Simon, E. ; Gál, J. ; Mikos, B. ; Fülesdi, B. / Comparison of two depth of anaesthesia monitors during general anaesthesia : Electrophysiological and clinical assessment. In: Acta Physiologica Hungarica. 2012 ; Vol. 99, No. 2. pp. 111-117.
@article{0c558a121e054f75a01bd60fd998d0ab,
title = "Comparison of two depth of anaesthesia monitors during general anaesthesia: Electrophysiological and clinical assessment",
abstract = "Cerebral state monitor (CSM) is a recently developed anaesthesia depth monitor based on EEG measurement. Medline search confirmed that the accuracy of this monitor has already been compared with BIS monitoring; however, we did not find any studies comparing CSM monitor with AEP monitoring. Therefore, the aim of our study was to investigate the correlation between AAI using AEP monitor and CSI (cerebral state index) using CSM monitor. Methods: Prospective, observational study involving 39 ASA I-III patients undergoing lumbar discus hernia operation. Simultaneous registration of CSI and AAI was performed during general anaesthesia. The identical values were off-line analysed. Additionally in 20 patients parallel registration of CSI and AAI was undertaken while anaesthesia was guided based on routine clinical signs. Results: While analysing the data in the superficial, ideal and deep anaesthesia zones, we found that a relationship between CSI and AAI is weak. Our patients spent roughly the half of the clinical anaesthesia in the ideal zone based on the AAI index and less than 50{\%} based on CSI. Almost one fifth of clinical anaesthesia based on AAI and nearly 40{\%} based on CSI was spent in the deep anaesthesia zones. A superficial anaesthesia has been detected in 27{\%} of time based on AAI and 17{\%} based on CSI. Conclusions: CSI and AAI weakly correlated to each other. Depth of anaesthesia monitors may be useful in detecting patients who spend valuable time within the deep anaesthetic zone.",
keywords = "Anaesthesia depth monitor, Cerebral state index, Cerebral state monitor, Depth of anaesthesia, EEG",
author = "Moln{\'a}r, {C. S.} and Kov{\'a}cs, {Z. S.} and E. Simon and J. G{\'a}l and B. Mikos and B. F{\"u}lesdi",
year = "2012",
month = "6",
day = "1",
doi = "10.1556/APhysiol.99.2012.2.3",
language = "English",
volume = "99",
pages = "111--117",
journal = "Physiology International",
issn = "2498-602X",
publisher = "Akademiai Kiado",
number = "2",

}

TY - JOUR

T1 - Comparison of two depth of anaesthesia monitors during general anaesthesia

T2 - Electrophysiological and clinical assessment

AU - Molnár, C. S.

AU - Kovács, Z. S.

AU - Simon, E.

AU - Gál, J.

AU - Mikos, B.

AU - Fülesdi, B.

PY - 2012/6/1

Y1 - 2012/6/1

N2 - Cerebral state monitor (CSM) is a recently developed anaesthesia depth monitor based on EEG measurement. Medline search confirmed that the accuracy of this monitor has already been compared with BIS monitoring; however, we did not find any studies comparing CSM monitor with AEP monitoring. Therefore, the aim of our study was to investigate the correlation between AAI using AEP monitor and CSI (cerebral state index) using CSM monitor. Methods: Prospective, observational study involving 39 ASA I-III patients undergoing lumbar discus hernia operation. Simultaneous registration of CSI and AAI was performed during general anaesthesia. The identical values were off-line analysed. Additionally in 20 patients parallel registration of CSI and AAI was undertaken while anaesthesia was guided based on routine clinical signs. Results: While analysing the data in the superficial, ideal and deep anaesthesia zones, we found that a relationship between CSI and AAI is weak. Our patients spent roughly the half of the clinical anaesthesia in the ideal zone based on the AAI index and less than 50% based on CSI. Almost one fifth of clinical anaesthesia based on AAI and nearly 40% based on CSI was spent in the deep anaesthesia zones. A superficial anaesthesia has been detected in 27% of time based on AAI and 17% based on CSI. Conclusions: CSI and AAI weakly correlated to each other. Depth of anaesthesia monitors may be useful in detecting patients who spend valuable time within the deep anaesthetic zone.

AB - Cerebral state monitor (CSM) is a recently developed anaesthesia depth monitor based on EEG measurement. Medline search confirmed that the accuracy of this monitor has already been compared with BIS monitoring; however, we did not find any studies comparing CSM monitor with AEP monitoring. Therefore, the aim of our study was to investigate the correlation between AAI using AEP monitor and CSI (cerebral state index) using CSM monitor. Methods: Prospective, observational study involving 39 ASA I-III patients undergoing lumbar discus hernia operation. Simultaneous registration of CSI and AAI was performed during general anaesthesia. The identical values were off-line analysed. Additionally in 20 patients parallel registration of CSI and AAI was undertaken while anaesthesia was guided based on routine clinical signs. Results: While analysing the data in the superficial, ideal and deep anaesthesia zones, we found that a relationship between CSI and AAI is weak. Our patients spent roughly the half of the clinical anaesthesia in the ideal zone based on the AAI index and less than 50% based on CSI. Almost one fifth of clinical anaesthesia based on AAI and nearly 40% based on CSI was spent in the deep anaesthesia zones. A superficial anaesthesia has been detected in 27% of time based on AAI and 17% based on CSI. Conclusions: CSI and AAI weakly correlated to each other. Depth of anaesthesia monitors may be useful in detecting patients who spend valuable time within the deep anaesthetic zone.

KW - Anaesthesia depth monitor

KW - Cerebral state index

KW - Cerebral state monitor

KW - Depth of anaesthesia

KW - EEG

UR - http://www.scopus.com/inward/record.url?scp=84864674156&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864674156&partnerID=8YFLogxK

U2 - 10.1556/APhysiol.99.2012.2.3

DO - 10.1556/APhysiol.99.2012.2.3

M3 - Article

VL - 99

SP - 111

EP - 117

JO - Physiology International

JF - Physiology International

SN - 2498-602X

IS - 2

ER -