...Sechang Oh; Hyeokjun Kwon; Vijay K. Varadan The Greek word “apnea” literally means “without breath.” The three types of apnea are obstructive, central, and mixed. Obstructive is the most common type. Despite the difference in the root cause of the three types of apnea, people with untreated sleep...

...Vijay K. Varadan; Sechang Oh; Hyeokjun Kwon; Phillip Hankins Currently, available sleep monitoring systems use electrical recording where the electrodes make contact with the patient’s skin using a conducting gel. The electrode wires are connected to a processing recording system. The subject has...