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目的:探索经皮穴位电刺激(TEAS)治疗功能性消化不良(FD)中餐后不适综合征(PDS)的疗效和机制。方法:采用双盲、随机、对照研究，前瞻性选择于浙江大学医学院附属邵逸夫医院就诊、满足罗马Ⅳ诊断标准中的18～70岁的PDS患者40例，患者知情同意后随机分入TEAS组和模拟TEAS组，分别接受经皮电针刺激足三里、内关穴和其相对应的模拟穴位治疗4周，比较2组患者治疗前后症状、胃容受性[初始饱腹量(ISV)、最大耐受量(MTV)]、固体胃半排空时间(n T1/2)和心率变异(高频段、低频段、低频段与高频段的比值)。采用PCR检测PDS患者和24名健康志愿者的十二指肠黏膜炎性因子表达，并比较TEAS组患者治疗前后炎性因子变化。统计学方法采用独立样本n t检验、Mann-Whitney n U检验、卡方检验。n 结果:共26例PDS患者纳入研究，TEAS组和模拟TEAS组各13例，2组患者性别构成、年龄，以及治疗前健康调查量表36(SF-36)评分、焦虑自评量表(SAS)评分、抑郁自评量表(SDS)评分、消化不良症状严重程度指数(DSSI)评分、ISV、MTV、n T1/2和心率变异参数(高频段、低频段、低频段与高频段的比值)差异均无统计学意义(n P均>0.05)。治疗后TEAS组患者DSSI评分低于模拟TEAS组[(13.5±5.3)分比(19.9±9.3)分]，ISV、MTV均高于模拟TEAS组[(180.0±44.6) mL比(121.9±61.0) mL，(480.4±200.7) mL比(338.5±108.8) mL]，差异均有统计学意义(n t＝2.18、2.77、2.24，n P均0.05)。TEAS组患者治疗前后的n T1/2比较差异无统计学意义(n P>0.05)。治疗后TEAS组的高频段较治疗前增加(5.3±1.2比4.0±0.9)，低频段与高频段比值降低(1.0±0.2比1.3±0.2)，差异均有统计学意义(n t＝-3.31、3.73，n P均0.05). After treatment, the DSSI score of TEAS group was lower than that of sham-TEAS group (13.5±5.3 vs. 19.9±9.3), the values of ISV and MTV were both higher than those of sham-TEAS group ((180.0±44.6) mL vs. (121.9±61.0) mL, (480.4±200.7) mL vs. (338.5±108.8) mL), and the differences were all statistically significant (n t=2.18, 2.77 and 2.24, all n P0.05). There was no statistically significant difference inn T1/2 between before and after treatment in patients of TEAS group (n P>0.05). After treatment, the high frequency increased (5.3±1.2 vs. 4.0±0.9) and the ratio of low frequency to high frequency decreased (1.0±0.2 vs. 1.3±0.2), and the differences were statistically significant (n t=-3.31 and 3.73, both n P<0.01). The expression levels of interleukin 6 (IL-6) mRNA in mucosa of duodenal bulb and descending duodenum of PDS patients were both higher than that of healthy control group (0.68, 0.11 to 6.74 vs. 0.03, 0.02 to 0.25; 6.46, 1.35 to 12.62 vs. 0.86, 0.32 to 2.90), and the differences were statistically significant (n Z=-2.24 and -2.03, n P=0.02 and 0.04). After TEAS treatment for four weeks, the expression of n IL-6 mRNA in duodenal bulb mucosa decreased compared with that before treatment in TEAS group (0.04, 0.01 to 0.06 vs. 0.23, 0.09 to 3.66) and the difference was statistically significant (n Z=-2.07, n P=0.04).n Conclusions:TEAS can improve the gastric accommodation and dyspeptic symptoms in PDS patients. The mechanism may be related with the vagal pathway mediating and regnlating the expression of inflammatory cytokine IL-6 in duodenal bulb mucosa.