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Acupuncture in the management of postoperative nausea and vomiting in patients receiving morphine via a patient-controlled analgesia system
McConaghy P, Bland D, Swales H
Acupuncture in Medicine 1996 May;14(1):2-5
clinical trial
6/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: Yes; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

This single-blind, randomised, controlled trial was undertaken to assess the efficacy of acupuncture (ACP) at the PC6 (Neiguan) point in the management of established postoperative nausea and vomiting (PONV) in patients receiving parenteral morphine via a patient-controlled analgesia system (PCAS). Eighty patients were recruited on the first postoperative day and 30 were treated with ACP after developing PONV lasting more than 10 min. Patients were randomly allocated to receive ACP bilaterally at either PC6 or at a dummy point near the elbow, with manual stimulation for a total of 4 min. Only patients with no knowledge of ACP antiemesis were studied, and each patient was thus unaware of the group to which they were allocated. Patients treated with PC6 ACP had a greater mean improvement in their visual analogue score for nausea (p < 0.05). All patients in the PC6 group improved their score by 20% or more, while only one third in the control group did so (p < 0.001). In the PC6 group 53% of patients did not require any further antiemetic while receiving PCAS morphine. All patients in the control group required further antiemetic treatment (p < 0.001). No adverse effects were recorded.

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