Ultra Wideband Radar for Respiratory Monitoring on Sleep Position

Abstract

Sleep apnea is a sleep disorder that has a relation with respiratory system during sleep.
One of the sleep apnea characteristic is suddenly stop breathing during sleep. People
have the dierent of respiratory rate (RR) which is affected by sleep positions and
body mass index (BMI).There are four sleep positions aecting the respiratory rate
(RR). Polysomnography (PSG) is conventionally used to analysis the sleep apnea. This
technique requires body contact that might be uncomfortable for the patient. In this
study, the Xethru X4M200 radar sensor is proposed as non-contact tool to detect the RR
by implementing the Doppler effect. Furthermore, the relation between RR with the sleep
position and the BMI are discused. For that purpose, 20 participants (10 males and 10
females) with dierent BMIs and sleep positions are examined by monitoring their chest
movement. This method is able to detect the indication of bradypnoea or tachypnoea.
Futher systematic study and more participants are required to confirm our results and
provide better non-contact technique for RR measurement.