BackgroundAuricular acupressure (AA) is widely used in treatment of dysmenorrhea, but the safety and efficacy of auricular acupressure on dysmenorrhoea are still lack of evidence-based basis.ObjectiveThe purpose of meta-analysis was to evaluate the effects of auricular acupressure on dysmenorrhea.Data sourcesA systematic search was conducted in six electronic databases, including PubMed, Embase, Cochrane Central Register of Controlled Trials (CINAHL), Weipu (CQVIP), China National Knowledge Infrastructure (CNKI), and Wanfang databases, to retrieve studies published from the inception dates to June 10, 2022.Study selectionRandomized controlled trials (RCTs) that investigated the effectiveness of AA on dysmenorrhea were identified.Data extraction and synthesisThe data extraction and quality assessment of the included studies were performed by two reviewers independently. Outcomes were abstracted to determine the effect measure by using mean differences (MD), standardized mean differences (SMD), or odds ratio (OR) from a random effects model.Main outcomes and measuresCure rate, total effective rate, and visual analogue scale (VAS) were described as primary outcomes; Short-form Menstrual Distress Questionnaire (MDQs), symptom scores, serum nitric oxide (NO) level, and adverse events were recorded as secondary outcomes.ResultsThirty-five RCTs involving 3960 participants were included in this study. Our findings indicated that, overall, AA was associated with a significant benefit in cured rate (OR = 1.95, 95%CI: [1.34, 2.83], P=0.0004, I2 = 75%), total effective rate (OR = 3.58, 95%CI: [2.92, 4.39], P<0.00001, I2 = 67%), VAS score (MD = -1.45, 95%CI: [-1.73, -1.17], P<0.00001, I2 = 67%), and symptom scores compared to the control group (SMD = -0.85, 95%CI: [-1.28, -0.43], P<0.0001, I2 = 91%). However, no difference in serum NO (SMD = 0.77, 95%CI: [-0.39, 1.92], P = 0.19, I2 = 89%) and MDQs (SMD = -0.58, 95%CI: [-1.26, 0.10], P = 0.10, I2 = 79%) was found between the two groups. Furthermore, subgroup analysis results indicated that AA showed significant superiorities in increasing cured rate and total effective rate, and reducing VAS score and symptom scores when compared to analgesics and non-intervention. Moreover, AA presented the same superiorities when used as an adjunctive strategy to other therapy. However, these benefits were not detected in AA used alone when compared to the therapies, including Chinese herbs, acupuncture, external application of Chineseherbal medicine, moxibustion, auricular needle, and health education.ConclusionsOverall, AA, as a potential safety therapy, is effective for the management of dysmenorrhea, such as increasing cured rate, total effective rate, VAS, and symptom scores. Nevertheless, AA showed no significant improvement in serum NO and MDQs. It is furtherly found that AA used alone is superior to analgesics and non-intervention regarding cured rate, total effective rate, VAS, and symptom scores. Furthermore, the same superiorities are observed when AA serves as an adjunctive strategy to other therapy. However, AA alone has little effect on them compared to other therapies, and there is no definite conclusion on the benefits of AA compared to placebo for patients with dysmenorrhea. Rigorous RCTs with blind method and placebo control are warranted to confirm these findings.Systematic review registrationhttps://www.crd.york.ac.uk/prospero/, identifier CRD42022338524.

Background: Acupuncture is widely used in treatment of postoperative ileus (POI), but the safety and efficacy of acupuncture in POI after gynecological surgery still lack of evidence-based basis. Methods: PubMed, CINAHL, EMBASE, Web of science, Google Scholar, Wangfang database, Chinese Biomedical Literature Database (SinoMed), Chinese Science and Technology Periodical Database, and China National Knowledge Infrastructure database will be searched until December 31, 2020. Two independent investigators will screen the relevant randomized controlled trials from Data one by one by using prespecified criteria. The relevant data from included studies will be extracted and analyzed by using RevMan V.5.3 software. Quality of the included studies will be estimated by using the Cochrane Collaboration risk of bias tool, and publication bias will be assessed by using Egger test and Begg test. In addition, quality of evidence will be evaluated by using Grading of Recommendations Assessment, Development, and Evaluation. Results: We will analyze the effect of acupuncture on time to first flatus and time to bowel sound recovery as the primary outcomes of this review. Meanwhile, frequency of bowel sounds, time to defecation, time of hospital stay, biochemical indicators related to gastrointestinal motility, inflammation factors, responder rate, and adverse events for patients receiving gynecological surgery. Conclusion: Our findings will benefit researchers and provide reference for the treatment and prevention of POI for the patients undergoing gynecological surgery.