Respiration is a vital function for every living thing.In clinical practice, any form of the respiratory dysfunction, if not detected and corrected in a timely manner, will have serious consequences.Conventional methods of monitoring the respiratory conditions of patients undergoing non-intubation anesthesia include stethoscope auscultation and peripheral capillary oxygen saturation SpO2 monitoring.SpO2 monitors the saturation of peripheral capillary hemoglobin, and its decrease indicates the occurrence of hemoglobin desaturation.