Abstract
Understanding and precise assessment of pain level are key factors in rehabilitation therapy. Pain is a complex and subjective experience that is affected by an individual’s emotion and health conditions. Various methods have been developed for quantitative evaluation of pain level; however, these methods have several drawbacks. In this work, we developed a pain measurement device for quantitative pain assessment. The system consists of two parts, a component for electrical stimulation and a pressure dolorimeter, for application of two different stresses. Regarding electrical stimulation, the degree of pain is assessed by the applied current. Skin resistance was also analyzed by applying current to remove the effects caused by skin conditions. The electrical stimulation did not induce any histological changes or inflammation in the tissues. Using the pressure dolorimeter, the pain level was assessed according to the degree of inflammation. This system could be used for the quantitative assessment of pain induced by inflammation, wounds, and other factors. Since the described system is the first of its kind, there are many problems that remain to be solved. However, with continuous development, our system could provide more accurate pain assessment by removing skin condition effects and through cross-validation.
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