Objective To investigate the clinical effect of different electroacupuncture waveforms for the treatment of intrauterine tissue residue after incomplete abortion evacuation of uterus and their influence on uterine involution. Methods A total of 123 patients with intrauterine tissue residue who underwent incomplete abortion evacuation of uterus were randomly divided into continuous wave group, intermittent wave group, or distant⁃dense wave group, with 41 cases in each group. On the basis of Western Medicine therapy, the continuous wave group was treated with continuous wave electroacupuncture waveform, the intermittent wave group was treated with intermittent wave electroacupuncture waveform, whereas the distant⁃dense wave group was treated with distant⁃dense wave electroacupuncture waveform. The tissue residue area, menstrual recovery time, vaginal bleeding time, Visual Analogue Scale (VAS) score for contraction pain, endometrial thickness, triple diameter of uterus, endometrial volume, resurgery rate, and score of life quality were compared between patients of the three groups. Results After 3 days of last treatment, tissue residue area and triple diameter of uterus in the three groups were decreased as compared with 1 day before treatment, while the endometrial thickness was increased as compared with 1 day before treatment, and the aforementioned indices in the distant⁃dense wave group were superior to those in the other two groups (P<0.05). After 1 day of last treatment, both 3 groups exhibited decreased VAS scores for contraction pain as compared with before treatment, and the distant⁃dense wave group yielded a lower VAS score for contraction pain as compared with the other two groups (P<0.05). The distant⁃dense wave group interpreted shorter vaginal bleeding time, menstrual recovery time as compared with the other two groups (P<0.05). After 6 months of treatment, score of life quality in the 3 groups was higher than that before treatment, and the distant⁃dense wave group presented a superior score of life quality to compare with the other two groups (P<0.05). There was no statistically significant difference in resurgery rate between patients of the 3 groups (P>0.05). Conclusion Electroacupuncture treatment can promote discharge of intrauterine tissue residue and uterine involution after incomplete abortion evacuation of uterus, therein the clinical effect of distant⁃dense wave electroacupuncture waveform is superior to continuous wave and intermittent wave electroacupuncture waveforms. 

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