Study: NCT03209323

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: electroencephalography (EEG)
Description: Four EEG channels were recorded using electrode positions as defined in the International 10-20 System with Ag/AgCl2 cup electrodes (Spes Medica) attached to the scalp with EC2 Electrode Cream (Grass Technologies). The impedance was set below 1 k, and the electrodes were attached to module S/5 E-EEG of the anaesthetic monitor S/5 (GE Healthcare).

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: electroencephalography (EEG)
Description: Four EEG channels were recorded using electrode positions as defined in the International 10-20 System with Ag/AgCl2 cup electrodes (Spes Medica) attached to the scalp with EC2 Electrode Cream (Grass Technologies). The impedance was set below 1 k, and the electrodes were attached to module S/5 E-EEG of the anaesthetic monitor S/5 (GE Healthcare).

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: electroencephalography (EEG)
Description: Four EEG channels were recorded using electrode positions as defined in the International 10-20 System with Ag/AgCl2 cup electrodes (Spes Medica) attached to the scalp with EC2 Electrode Cream (Grass Technologies). The impedance was set below 1 k, and the electrodes were attached to module S/5 E-EEG of the anaesthetic monitor S/5 (GE Healthcare).

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: bispectral index (BIS)
Description: The BIS score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: bispectral index (BIS)
Description: The BIS score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: bispectral index (BIS)
Description: The BIS score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: response and state entropy (RE and SE)
Description: The respone and state entropy (RE and SE) score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: response and state entropy (RE and SE)
Description: The respone and state entropy (RE and SE) score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: response and state entropy (RE and SE)
Description: The respone and state entropy (RE and SE) score was derived from a sensor (Aspect Medical Systems) positioned diagonally on the patients' foreheads according to producer's instructions.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: middle latency auditory evoked potentials (MLAEP)
Description: value of A-line Auto Regressive Index (AAI) derived from middle latency auditory evoked potentials (MLAEP) (A-line Monitor, Danmeter A/S, Odense, Denmark) was observed which measures the central nervous system responsiveness to a specific auditory stimulus

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: middle latency auditory evoked potentials (MLAEP)
Description: value of A-line Auto Regressive Index (AAI) derived from middle latency auditory evoked potentials (MLAEP) (A-line Monitor, Danmeter A/S, Odense, Denmark) was observed which measures the central nervous system responsiveness to a specific auditory stimulus