Nasal flow sensors are utilized for diagnosis of sleep apnea syndrome (SAS). Discomfort and fluctuation in sensitivity caused by body movements are problems when patients wear nasal flow sensors during polysomnography (PSG) tests. The aim of this study was to clarify the accuracy of non-restrictive sensing system for diagnosing SAS using three-dimensional Fiber-Grating (FG) sensors.
Twenty patients with SAS were enrolled in the study [M:F=19:1, age 50.0±26 years old, BMI 26.2kg/m2, apnea-hypopnea index (AHI): 25.6]. Three-dimensional FG measurement and PSG tests were conducted simultaneously. AHI determined by using pressure flow, and the movement of thoracic and abdominal walls during PSG were compared to those by FG sensors in the supine and lateral positions.
AHI determined by FG sensors and PSG tests were well correlated (r=0.973, P<0.0001; supine position: r=0.974, P<0.0001, lateral position: r=0.965, P<0.0001, respectively). All twenty patients underwent these tests with no trouble and good compliance.
The accuracy of non-restrictive sensing system for diagnosing SAS was clarified.
Since the non-restrictive system using FG sensors is more comfortable and convenient for making diagnosis of SAS than the conventional one, it may be widely introduced.
Hisashi Takaya, None.