Abstract
PainVisionTM PS-2100 (Osachi Japan), is an instrument that shows pain degree calculated from current perception threshold defined by the lowest electrical current detected by patients and pain compatible electrical current defined by the electrical current judged as being compatible with the intensity of ongoing pain by patients. The results of pain treatment were evaluated by PainVision and visual analog scale of pain (VAS) in 25 patients. Pain intensities decreased in 16 patients (relief group), and did not change in 9 (no-relief group). In the pain relief group, pain intensities measured by VAS, pain compatible currents, and pain degrees decreased significantly and current perception thresholds increased significantly, after treatments. By contrast, in the no-relief group, pain intensities measured by VAS, pain compatible currents, and, pain degrees did not significantly change after treatments; however, current perception thresholds decreased after treatments. Pain degree showed the highest positive correlation with pain intensity by VAS. We conclude that PainVision may be useful because it can express results of pain treatment by objective pain degree rather than subjective pain intensities by VAS.
