- The Bi-Digital O-Ring Test used in the successful diagnosis & treatment (with antibiotic, anti-viral agents & oriental herbal medicine) of a patient suffering from pain & weakness of an upper extremity & Barré-Liéou syndrome appearing after whiplash injury. A case report. Ayuzawa, S., Yano, H., Enomoto, T., Kobayashi, H., Nose, T. Acupuncture & electro-therapeutics research. (1997)