Osteopathic diagnosis and treatment of the spine in patients with chronic back pain through the lens of medical infrared thermography: A randomized controlled pilot study.

BACKGROUND AND PURPOSE

Chronic back pain conditions are highly prevalent worldwide. Osteopathic treatment seems to improve pain and function in this population. However, the mechanisms underlying osteopathic diagnosis and treatment of the spine are mainly unknown. Arguably, both inflammatory and autonomic processes may be involved, which should entail changes in skin temperature. Primarily, the feasibility of the study protocol was evaluated by assessing the retention, adherence, acceptability, safety, and blinding concealment rates and carrying out a power analysis. Secondarily, we investigated diagnostic correlations between pain ratings, palpatory findings, and skin temperature in spinal segments and therapeutic effects of osteopathic and sham spine manipulations.

MATERIALS AND METHODS

In this single-blinded, randomized, and sham-controlled pilot and feasibility study, participants with chronic back pain were randomly allocated (1:1 ratio) to receive a single session of osteopathic or sham spine manipulations. Manual diagnosis, pain assessment, and infrared imaging were performed before treatment (baseline) and one week after treatment (follow-up), whereas infrared imaging was additionally conducted shortly after treatment (post-intervention).

RESULTS

Seventeen participants completed the trial with 89.5 % retention, 100 % adherence, 100 % acceptability, 6 % adverse events, 22 % (osteopathic) and 50 % (sham) blinding concealment. A power analysis estimated a sample of 40 subjects for future randomized controlled trials. At baseline, no significant correlations were detected between palpatory findings, pain ratings, and skin temperature. There were no significant between-group differences in palpatory findings at single time points and pain ratings across time points (p < 0.05), whereas skin temperature showed significant between-group differences across all time points (p < 0.01). At post-intervention, osteopathic spine manipulations increased the skin temperature with a medium effect (Cohen's d = 0.66).

CONCLUSION

The study was feasible. Osteopathic diagnosis does not seem to correlate with pain ratings and skin temperature. However, the increase in skin temperature shortly after osteopathic treatment suggests an autonomic (hyper-parasympathetic) effect.