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![Figure 4](/view/journals/anpr/56/3/inline-i0003-3006-56-3-75-f04.gif)
Changes in bispectral index (BIS). At the optimum sedation level, BIS was significantly lower than pretreatment values in the 2 groups. During maintenance administration, the fluctuation of BIS in Group D was greater than that in Group P.
![Figure 1](/view/journals/anpr/58/2/inline-i0003-3006-58-2-66-f01.png)
Clinical photograph of BIS monitor and 4 electrodes placed on patient's forehead.
![<bold>Figure 2</bold>](/view/journals/anpr/60/3/inline-i0003-3006-60-3-125-f10.png)
BIS monitor electrode Electrical potential difference between electrodes 1 and 3, and between 1 and 4, are reflected in the BIS Index. Electrode 2 is a reference electrode.
![<bold>Figure 3</bold>](/view/journals/anpr/63/4/inline-i0003-3006-63-4-185-f03.png)
Scatter plots of bispectral index (BIS) versus salivary weight in (A) without-movements (closed circles) and (B) with-movements (open circles) states.
![Figure 2](/view/journals/anpr/58/2/inline-i0003-3006-58-2-66-f02.png)
Results of BIS values at the different stages of the procedure (baseline, start of procedure, and recovery) for all patients (n = 35).
![Figure 5](/view/journals/anpr/55/3/inline-i0003-3006-55-3-82-f05.gif)
Changes in bispectral index (BIS) and Ramsay score (RS). BIS decreased significantly from 10 minutes after the start of dexmedetomidine (Dex) infusion to 30 minutes after the end of Dex infusion (P < .05). RS showed the optimal sedation level from 10 minutes to 30 minutes after the start of Dex infusion.