Electroacupuncture for Dysmenorrhea Secondary to Adenomyosis

Hwato brand disposable acupuncture needles (size 0.30 × 40 mm and 0.30 × 75 mm) and SDZ-V electroacupuncture apparatus will be used. Acupoints of Ciliao (BL32), Shiqizhui (EX-B8), and Sanyinjiao (SP6) will be used for participants. The needles will be inserted to 60-70mm in BL32 and 25-30mm in EX-B8 and SP6. Needle manipulation will be conducted (except for BL32) to achieve deqi sensation. Then paired electrodes from the electroacupuncture apparatus will be attached transversely to the needle handles at bilateral BL32 and SP6. The electroacupuncture stimulation will last for 30 minutes with a continuous wave of 5Hz and a current intensity of 1 to 5mA. Current intensity was adjusted according to the patients' individual tolerance.Treatment will start within one week before the onset of menstruation and stop before the end of menstruation, three sessions per menstrual cycle in total (ideally every two to three days and at least one session during menstruation period).

Hwato brand disposable acupuncture needles (size 0.25 × 40 mm and 0.30 × 25 mm) and SDZ-V electroacupuncture apparatus will be used. Sham acupoints of BL32, EX-B8 and SP6 will be used for every participants. The needles will be inserted to 2-3mm in sham acupoints. Procedures, electrode placements, and other treatment settings were the same as in the electroacupuncture group but with no electricity output or needle manipulation for de qi.