OBJECTIVE: This study aimed to examine the adjuvant effects of auricular acupres-sure in augmenting intravenous patient-controlled analgesia with morphine and droperidol for postoperative lumbar surgery patients in terms of postoperative pain relief satisfaction, and the incidence of postoperative nausea and vomiting (PONV). METHODS: In this single-blind experimental study, 94 subjects were randomly assigned to the experimental group in which patients received auricular acupressure to six auricular acupoints or a control group without acupressure. Data were collected using the American Pain Society Patient Outcome Questionnaire. Descriptive analyses, t tests, chi(2) tests, Mann-Whitney tests, and the generalized estimating equation model were used. RESULTS: The experimental group had lower average pain scores than the control group, but no between-group difference was found. Analgesic dose and satisfaction were similar in both groups. The incidence of PONV was low and similar in both groups. CONCLUSION: Although this study did not demonstrate adjuvant effects of auricular acupressure on postoperative pain, analgesic dose, analgesic satisfaction and PONV, most subjects were satisfied with the pain management even though they were subjected to moderate pain because of insufficient analgesia. Further studies should reconfirm the effects of auricular acupressure on analgesia provided by intravenous patient-controlled analgesia in postoperative patients, and its influence on the frequency and duration of analgesia administration.

Our objective was to study the analgesic effect of acupoint pressure on postoperative pain in a controlled single-blind study. Forty patients undergoing knee arthroscopy in an ambulatory surgery unit in a university-affiliated hospital were randomized to receive either an active stimulation (AS) or a placebo stimulation (PS) 30 min after awakening from anesthesia. We stimulated 15 classical acupoints in the AS group, on the side contralateral to surgery, with a firm pressure and a gliding movement across the acupoint. In the PS group, 15 nonacupoints were subjected to light pressure in the same areas as the acupoints in the AS group. We assessed pain using a 100-mm visual analog scale (VAS) before sensory stimulation, after 30 and 60 min, and after 24 h. We recorded heart rate, systolic arterial pressure, and skin temperature before stimulation and after 30 and 60 min. We assessed skin blood flow with laser Doppler before stimulation and after 1 and 30 min. Sixty minutes and 24 h after AS, VAS pain scores were lower than in the placebo group (p<0.05 and 0.0001, respectively). There were no significant changes in the autonomic variables. The results indicate that pressure on acupoints can decrease postoperative pain.