الفهرس 
Intoduction and rationale…………………………………………………………….Only 14 pages are availabe for public view
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Abstract
The routine appoarch for evaluating the depth of anesthesia is the assesment of hemodynamic parameters and subjective signs such as movement, sweating, and lacrimation, which are not adequately sensitive and specific(9). Since 1977, several studies have sought to determine whether Bispectral Index (BIS) monitoring is a raliable tool for the analysis of the anesthetic depth(10).
An FDA-approved method, the BIS is adequately sensetive for the evaluation of the depth depth of anesthesia and is believed to be useful for the detection of light anesthesia by processing the patient’s electroencephalogram (EEG)(11, 12).
Accordingly, the BIS can be drawn upon to prevent anesthetic complications such as awareness, recall, and unintentional hemodynamic changes in operations with significant risk of inadequate depth of anesthesia like C/S(4).
The BIS ranges from 0 (EEG silence) to 100 (fully awake and alert) (12). A BIS ranges of 40 to 60 denotes an adquate level of anesthesia(13). In short, the BIS presents an evaluation of the depth of anesthesia in surgicalpatients(14). It should also be noted that titrating anesthetic agents via BIS monitoring candecreasethetotal dose of hypnotic drugs mandatory for an acceptable depth of anesthesia (12).
Dexmedetomidine(DEX) is a highly selective alpha 2 adrenergic receptor agonist, so that it has many actions like; sedation, analgesia, decreasing intraoperative function with smooth recovery when used as an adjunct to general anesthesia(15, 16).
(2)