The differences of the numbers of cases who received additional anesthetic in the operation had no statistical significance among the three groups ( all P > @ ) , but compared with the sham electroacupuncture group and blank group , the total dose of painkillers in the first @ h after operation was reduced in the electroacupuncture group -LSB- ( @ + / - @ ) tablets vs ( @ + / - @ ) tablets , ( @ + / - @ ) tablets -RSB- , and the score of most severity pain was also decreased ( @ + / - @ vs @ + / - @ , @ + / - @ ) , besides , the sleeping time in the night of surgery was increased -LSB- ( @ + / - @ ) min vs ( @ + / - @ ) min , ( @ + / - @ ) min , all P < @ -RSB- .