Non-contact diagnosis of obstructive sleep apnea using impulse-radio ultra-wideband radar.

ABSTRACT: While full-night polysomnography is the gold standard for the diagnosis of obstructive sleep apnea, its limitations include a high cost and first-night effects. This study developed an algorithm for the detection of respiratory events based on impulse-radio ultra-wideband radar and verified its feasibility for the diagnosis of obstructive sleep apnea. A total of 94 subjects were enrolled in this study (23 controls and 24, 14, and 33 with mild, moderate, and severe obstructive sleep apnea, respectively). Abnormal breathing detected by impulse-radio ultra-wideband radar was defined as a drop in the peak radar signal by ?30% from that in the pre-event baseline. We compared the abnormal breathing index obtained from impulse-radio ultra-wideband radar and apnea-hypopnea index (AHI) measured from polysomnography. There was an excellent agreement between the Abnormal Breathing Index and AHI (intraclass correlation coefficient?=?0.927). The overall agreements of the impulse-radio ultra-wideband radar were 0.93 for Model 1 (AHI???5), 0.91 for Model 2 (AHI???15), and 1 for Model 3 (AHI???30). Impulse-radio ultra-wideband radar accurately detected respiratory events (apneas and hypopneas) during sleep without subject contact. Therefore, impulse-radio ultra-wideband radar may be used as a screening tool for obstructive sleep apnea.

SUBMITTER: Kang S 

PROVIDER: S-EPMC7093464 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature