[Current situation and existing problems of acupuncture for primary hypertension]

To analyze the present situation and existing problems of acupuncture for primary hypertension (PH) based on clinical research literature in recent 20 years.

The clinical research literature regarding acupuncture for PH were searched from China National Knowledge Infrastructure (CNKI), VIP data network (VIP) and Wanfang database from 1997 through 2016; a total of 218 papers met the inclusive criteria. Microsoft Excel and Apriori algorithm of SPSS Clementine software were applied to analyze the data.

The main acupoints of acupuncture for PH were Taichong (LR 3), Quchi (LI 11), Zusanli (ST 36) and Hegu (LI 4), but its support degree was only 12.21%. 127 papers were randomized controlled trials, accounting for 58.26%. 158 papers had clear diagnostic criteria, accounting for 72.48%. 138 papers had clear efficacy evaluation criteria, accounting for 63.30%. Only 5.05% of the papers were classified as high-quality literature by using Jadad scale.

In recent 20 years, some rules existed in acupoint selection for PH, but the support degree was low so it could not accurately guide clinical treatment. Although the clinical literature quality of acupuncture for PH was gradually increasing, the proportion of high-quality literature was low, therefore modern medical research model and foreign similar research should be followed to design a more rigorous trial protocol. As a result, the quality of clinical research is increased to provide reference for future clinical treatment.