Physiological Signals Based Quantitative Evaluation Method of the Pain

Quantitative analysis of pain is extremely difficult, because it is a subjective and individual sensation caused by the potential or existing observable tissue injury. For individuals with major cognitive or communicative impairments, it is necessary to carry out an effective method to quantify pain without self-report. Focusing on using physiological signals of the human body to evaluate pain, this paper proposes a new quantitative evaluation method with multiple physiological information to recognize the intensity of pain, which is induced by electrical stimulation that can be measured. When different intensity electrical stimulation applying on the subject, three-channel biosensors (BVP, ECG, SC) were used to obtain blood volume pulse, electrocardiogram and skin conductance. Experiments show that the proposed method can estimate the intensity of stimulation, which means that it can give the objective and quantitative evaluation of the pain.