Acupuncture Reduces Pain and Autonomous Distress During Injection of Local Anaesthetic in Children - a Randomised Crossover Investigation

Stimulation of acupoint LI4 has been shown to result in analgesic effects in patients experiencing acute pain. We aimed to determine whether LI4 acupuncture could reduce pain and distress in children receiving an injection of a local anaesthetic (LA). Children scheduled for dental treatment using local anesthesia as a standard treatment, received bilateral acupuncture at LI4 using indwelling fixed needles. During the treatment, the parents of the patients stimulated the needles by massage. Two different treatment regimes were compared: a standardized LA injection given 5 minutes after acupuncture, and an LA injection without acupuncture. The order of treatment was randomised, with the two treatments performed on different days. Pain intensity during LA injection, assessed by the patient with the Verbal Rating Scale or Faces Pain Scale (0-10), was used as the primary endpoint. Parent- and dentist-assessed pain intensity and agitation, heart rate, and the patients' satisfaction with the received therapy were also recorded.