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Cerebral state monitor, a new small handheld EEG monitor for determining depth of anaesthesia: a clinical comparison with the bispectral index during day-surgery.
Eur J Anaesthesiol. 2006 Mar; 23(3):208-12.EJ

Abstract

BACKGROUND AND OBJECTIVE

The cerebral state index (CSI) derived from a new small handheld electroencephalogram monitor was studied during routine day surgical anaesthesia titrated according to the bispectral index (BIS). The objective was to determine the degree of agreement between the two monitors.

METHODS

Anaesthesia was induced with propofol and fentanyl (0.1 mg) in 38 patients undergoing general anaesthesia for routine day-surgery. Maintenance anaesthesia (sevoflurane (20/38), desflurane (10/38) or propofol (8/38)) titrated by BIS XP (Aspect Medical, Natwick, MA, USA) and BIS and CSI (cerebral State Monitor, Danmeter; Odense, Denmark) index values were recorded every minute. No patient received muscle relaxation. Observer's Assessment of Alertness/Sedation rating scale was used to assess level of sedation.

RESULTS

Pair-wise recordings (914) of CSI and BIS were collected. The indices showed similar pattern and decreased with increasing level of sedation, however with large ranges for each level of sedation. Median indices were similar during surgery (BIS: 50 (14-89); CSI: 51 (7-88)) and both indices increased (P 20% from BIS-index in 24% of readings, and on rare occasions CSI indices deviated >100% from the BIS reading. When BIS < 40, CSI decreased slower than BIS and with wider spreading.

CONCLUSIONS

When used for day-surgery anaesthesia without muscle relaxation, CSI and BIS show similar patterns and numerical values but with the incidence of occasionally large discrepancies between pair-wise readings. Which monitor is the more dependable remains to be established and cannot be implied from this initial explorative study.

Authors+Show Affiliations

Department of Cardiothoracic Anaesthetics and Intensive Care, Karolinska Hospital, Stockholm, Sweden.No affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article

Language

eng

PubMed ID

16430792

Citation

Anderson, R E., and J G. Jakobsson. "Cerebral State Monitor, a New Small Handheld EEG Monitor for Determining Depth of Anaesthesia: a Clinical Comparison With the Bispectral Index During Day-surgery." European Journal of Anaesthesiology, vol. 23, no. 3, 2006, pp. 208-12.
Anderson RE, Jakobsson JG. Cerebral state monitor, a new small handheld EEG monitor for determining depth of anaesthesia: a clinical comparison with the bispectral index during day-surgery. Eur J Anaesthesiol. 2006;23(3):208-12.
Anderson, R. E., & Jakobsson, J. G. (2006). Cerebral state monitor, a new small handheld EEG monitor for determining depth of anaesthesia: a clinical comparison with the bispectral index during day-surgery. European Journal of Anaesthesiology, 23(3), 208-12.
Anderson RE, Jakobsson JG. Cerebral State Monitor, a New Small Handheld EEG Monitor for Determining Depth of Anaesthesia: a Clinical Comparison With the Bispectral Index During Day-surgery. Eur J Anaesthesiol. 2006;23(3):208-12. PubMed PMID: 16430792.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cerebral state monitor, a new small handheld EEG monitor for determining depth of anaesthesia: a clinical comparison with the bispectral index during day-surgery. AU - Anderson,R E, AU - Jakobsson,J G, PY - 2005/10/27/accepted PY - 2006/1/25/pubmed PY - 2006/10/27/medline PY - 2006/1/25/entrez SP - 208 EP - 12 JF - European journal of anaesthesiology JO - Eur J Anaesthesiol VL - 23 IS - 3 N2 - BACKGROUND AND OBJECTIVE: The cerebral state index (CSI) derived from a new small handheld electroencephalogram monitor was studied during routine day surgical anaesthesia titrated according to the bispectral index (BIS). The objective was to determine the degree of agreement between the two monitors. METHODS: Anaesthesia was induced with propofol and fentanyl (0.1 mg) in 38 patients undergoing general anaesthesia for routine day-surgery. Maintenance anaesthesia (sevoflurane (20/38), desflurane (10/38) or propofol (8/38)) titrated by BIS XP (Aspect Medical, Natwick, MA, USA) and BIS and CSI (cerebral State Monitor, Danmeter; Odense, Denmark) index values were recorded every minute. No patient received muscle relaxation. Observer's Assessment of Alertness/Sedation rating scale was used to assess level of sedation. RESULTS: Pair-wise recordings (914) of CSI and BIS were collected. The indices showed similar pattern and decreased with increasing level of sedation, however with large ranges for each level of sedation. Median indices were similar during surgery (BIS: 50 (14-89); CSI: 51 (7-88)) and both indices increased (P 20% from BIS-index in 24% of readings, and on rare occasions CSI indices deviated >100% from the BIS reading. When BIS < 40, CSI decreased slower than BIS and with wider spreading. CONCLUSIONS: When used for day-surgery anaesthesia without muscle relaxation, CSI and BIS show similar patterns and numerical values but with the incidence of occasionally large discrepancies between pair-wise readings. Which monitor is the more dependable remains to be established and cannot be implied from this initial explorative study. SN - 0265-0215 UR - https://www.unboundmedicine.com/medline/citation/16430792/Cerebral_state_monitor_a_new_small_handheld_EEG_monitor_for_determining_depth_of_anaesthesia:_a_clinical_comparison_with_the_bispectral_index_during_day_surgery_ L2 - http://ovidsp.ovid.com/ovidweb.cgi?T=JS&amp;PAGE=linkout&amp;SEARCH=16430792.ui DB - PRIME DP - Unbound Medicine ER -