Mobile sleep apnea detection and monitoring based on thermocouple and pulse oximeter sensors

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2018
Demirkol Çakmak, Duygu
Sleep apnea syndrome is becoming a prevalent disease for both adults and children. It is described as the cessation of breath for at least 10 seconds during sleep. Detecting sleep apnea is considered as a troublesome and time-consuming method, which requires the patients to stay one or more nights in dedicated sleep disorder rooms with sensors physically attached to their body. Undiagnosed, thereby untreated, sleep apnea patients are under high risk of hypertension, heart attack, accidental injuries through fatigue and sleeplessness. In this project, a portable, low cost and user friendly device to detect sleep apnea which is able to share the necessary information to the patients and doctors during the duration of the whole sleep cycle is developed. To this end, nasal and oral respiratory information is obtained with utilizing thermocouple and oxygen saturation in the blood is obtained with utilizing pulse oximeter. An analog electronic circuit is designed to readout thermocouple and pulse oximeter signals. According to the collected respiratory and pulse oximetry signals, sleep apnea is detected in real time by a software implemented into an ARM based processor. An Android mobile application is developed to record and display the oxygen saturation, heart rate and respiratory signal data during sleep. Communication between ARM based processor and mobile application is established via Bluetooth interface to reduce cabling on the patient. The experimental results gathered from five subjects show that number of sleep apnea can be detected with 100% accuracy, heart rate and SpO2 can be calculated with approximately 99% accuracy.

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Citation Formats
D. Demirkol Çakmak, “Mobile sleep apnea detection and monitoring based on thermocouple and pulse oximeter sensors,” M.S. - Master of Science, Middle East Technical University, 2018.