APACHE II	Acute Physiology and Chronic Health Evaluation II
BIS	Bispectral Index
CI	Confidence Interval
CONSORT	Consolidated Standards of Reporting Trials
CPOT	Critical-Care Pain Observation Tool
ICU	Intensive Care Unit
IL-6	Interleukin-6
IMV	Invasive Mechanical Ventilation
NIC	Nursing Interventions Classification
PRL	Prolactin
SD	Standard Deviation
SpO2	Peripheral Oxygen Saturation