Non-contact respiration monitoring method for screening sleep respiratory disturbance using slit light pattern projection

Abstract

We proposed the respiration monitoring method with non-contact and unrestraint, applied the projection of the near-infrared multiple slit-light pattern. In the respiration monitoring method, the shift length of multiple-slit pattern light, projected on the thoracicoabdominal part of sleeping person, is calculated by motion-image analysis. By the simultaneous meas-urement with the spirometer, the validity of the non-contact respiration monitoring by our method was indicated. As a result of all night measurement, we found that our proposed method enable the disease presentation, which was typical of obstructive sleep apnea, to be detected.