Effect of Electroacupuncture on the Incidence of Postoperative Delirium in Elderly Patients Undergoing the Major Surgery

"Participants in the electroacupuncture group received acupuncture (0.30mm×70mm) at bilaterally Shenmen (HT7) acupoints (0.3-0.5 inch), Neiguan (PC6) acupoints (0.5-1 inch), Baihui (DU20) acupoint (0.5-0.8 inch) and Yintang (EX-HN3) acupoint (0.3-0.5 inch) 30 minutes before anesthesia induction. After Deqi, electroacupuncture stimulation apparatus (HANS G6805-2, Huayi Co, Shanghai, China) is connected with the density wave (2/100 Hz), width 0.25 ms, intensity of 1 \~ 30 mA (gradually increase to the patient's maximum tolerance) and maintained the end of operation."

"Participants in the sham electroacupuncture group received shallow needling (0.30mm×25mm) at bilateral sham HT7, PC6, DU20 and EX-HN3 (nonacupoints located 1 inch beside acupoints, about 20mm). Specifically, the depth of needle insertion into nonacupoints is 3-5mm and avoided manual stimulation and no Deqi without actual current output, and retained the needle until the end of surgery."