Acupuncture in the Treatment of Rheumatic Diseases

This comprehensive review examines the scientific evidence on the use of acupuncture in the treatment of rheumatic diseases, an ancient practice of traditional Chinese medicine that has been gaining popularity in the West. Acupuncture is based on the insertion of needles at specific points on the body to restore energetic balance (qi, 氣) and promote healing.

The authors conducted a systematic analysis of the literature published between 2007 and 2012, examining evidence on the use of acupuncture in conditions such as rheumatoid arthritis, fibromyalgia, neck, shoulder, low back, and knee osteoarthritis pain. The methodology included a review of multiple databases and analysis of randomized clinical trials (RCTs).

For rheumatoid arthritis, the evidence is limited and inconclusive. Only two small low-quality studies were identified, with no significant benefits of acupuncture demonstrated on disease activity measures, pain, or inflammatory markers. The authors conclude that there is insufficient evidence to recommend acupuncture for this condition.

In fibromyalgia, the results are mixed. Although some studies show small benefits in pain reduction, these effects are short-lived and may not have significant clinical relevance. A 2010 review including 385 patients found only a small analgesic effect that was not maintained at long-term follow-up.

For chronic neck pain, there is moderate evidence of benefit when compared with waiting-list controls. A Cochrane review of 10 studies with 661 patients showed statistically significant pain improvement, but only in the short term. The effect size was modest, with a standardized mean difference of -0.37.

In shoulder pain, the evidence is controversial. Although a Cochrane review found no clear benefits, a later German study (GRASP) with 424 patients showed superiority of acupuncture over conservative treatment, with 68% responders in the acupuncture group versus 28% in the control group.

For low back pain, multiple reviews show a consistent pattern: acupuncture is not superior to sham acupuncture, but both are superior to conventional treatment. The large GERAC study with 1,162 patients confirmed this finding, suggesting a strong placebo effect component.

In knee osteoarthritis, several German studies and meta-analyses show small and questionably relevant benefits. A 2010 Cochrane review with 3,438 patients found a statistically significant difference favoring acupuncture, but one that did not reach the predefined threshold for clinical relevance.

A crucial methodologic issue is the difficulty of establishing adequate controls. Sham acupuncture may not be physiologically inert, and even minimal stimuli can produce therapeutic effects. Many studies show benefits of acupuncture over usual care, but not over sham acupuncture, questioning whether the observed effects represent more than placebo response.

Neurofunctional studies reveal that acupuncture activates brain areas involved in pain processing, including endorphin release and activation of the endogenous opioid system. However, similar mechanisms are observed with placebo effect, making it difficult to separate specific from nonspecific effects.

Patient expectations and communication with therapists significantly influence outcomes. A controlled study showed that patients who received positive communication about expected benefits had greater pain reduction, regardless of whether they received real or sham acupuncture.

As for safety, although generally considered safe, serious adverse events have been reported, including 95 cases of trauma, infection, and other complications, with 5 deaths recorded. Pneumothorax and cardiac tamponade are rare but potentially fatal complications.

In conclusion, although acupuncture may provide some symptomatic relief for certain musculoskeletal conditions, the benefits are generally small, short-lived, and may be largely related to placebo effects. The methodologic quality of many studies is limited, and higher-quality trials tend to show less positive results. More rigorously controlled trials, incorporating neurochemical and neurofunctional assessments, are needed to better elucidate the specific effects of acupuncture.