Evaluation of the efficacy of subcutaneous carbon dioxide insufflations for treating acute non specific neck pain in general practice: A sham controlled randomized trial

The study indicates that subcutaneous carbon dioxide insufflations are not superior to sham ultrasound for treating patients with acute non specific neck pain. Because course of pain did not differ from the one expected from self limitation, it is likely that non specific effects played only a minor role, if any, in both interventions.