Comparison of Two Electroencephalogram (EEG)-Derived Indices With Electroencephalogram Signals

Arvi Yli-Hankala65 enrolled

Overview

Bispectral Index (BIS) and Entropy indices will be compared with each other, and to raw EEG signals in patients receiving sevoflurane anaesthesia. BIS and Entropy numbers often differ significantly from each other during surgery, and the reason for this has not been studied in detail, therefore remaining only poorly understood. BIS and Entropy, together with multi-channel EEG, will be collected and analyzed later on. Course of anaesthesia and surgery will be annotated. All relevant information from anaesthesia monitor will be collected on computer.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Anaesthesia Surgery

Eligibility

Sex: ALLMin age: 50 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Planned surgery necessitating general anaesthesia * Expected duration of anaesthesia 30 min or more * Need of endotracheal intubation * ASA status 1, 2 or 3 Exclusion Criteria: * Significant disorders of the autonomic or central nervous system * Family history of malignant hyperthermia * Clinical history of anaphylactic reaction against inhaled anaesthetics * Disability to communicate with Finnish language

Locations (1)

Tampere University Hospital

Tampere, Finland

Outcomes

Primary Outcomes

Morphology of electroencephalogram during discrepancy between Entropy and BIS index values

Time frame: 15 minutes

Data from ClinicalTrials.gov

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