[Effect of electroacupuncture on bispectral index of electroencephalography in patients undergoing subtotal thyroidectomy].
OBJECTIVE
To investigate the effects of electroacupuncture on bispectral index (BIS) of electroencephalography in patients undergoing subtotal thyroidectomy.


METHODS
Sixty patients were equally randomized into group A given electroacupuncture combined with cervical plexus block (CPB) and group B given CPB alone. After needling sensation was reached in bilateral "Hegu" and "Neiguan" acupoints, 5 min of high frequency electrical stimulation by electrical stimulation device followed with CPB was applied to group A, while only CPB was performed in group B. Visual analog scale (VAS) and verbal stress scale (VSS) were monitored, complication and adverse reaction were observed and BIS, mean arterial pressure (MAP), heart rate (HR) and arterial oxygen saturation (SaO2) were monitored continuously in the perioperative period.


RESULTS
HR increased and BIS decreased in group A, both were lower significantly than those in group B (P < 0.01); MAP, the complementary dosage of fentanyl and lidocaine used and scores of VAS and VSS were also lower in group A than those in group B (P < 0.01).


CONCLUSIONS
Electroacupuncture could enhance the anesthetic effect of CPB, lower the BIS value during subtotal thyroidectomy.
Liu
Yu-Yong
YY
Department of Anesthesiology, The First Affiliated Hospital of Jinan University, Guangzhou. docyong@126.com
Li
Ya-Lan
YL
Cai
Ming-Xue
MX
D015667:Acupuncture Analgesia; D000293:Adolescent; D000328:Adult; D002572:Cervical Plexus / Q000503:physiopathology; D015671:Electroacupuncture; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009407:Nerve Block; D013965:Thyroidectomy / Q000379:methods*