Significance of a screening device (Apnomonitor 5) for sleep apnea syndrome.
OBJECTIVE
The objective was to evaluate the significance of a portable sleep-monitoring device (Apnomonitor 5, Chest Co., Tokyo, Japan) to diagnose sleep apnea syndrome (SAS).


METHODS
The Apnomonitor 5 comprised an oronasal thermistor, a pulse oximeter, chest and abdominal belts to monitor the circumferences of the chest and abdomen, a microphone to monitor tracheal sound, a position detector, and an integrative unit. This screening device was commercially available and it had been used to diagnose SAS in our country. Twenty-two consecutive adults who attended Inazawa City Hospital who were suspected for SAS were prospectively enrolled and they undertook the standard polysomnography (PSG) and Apnomonitor 5 simultaneously. The designated polysomnographers analyzed the records of the PSG and Apnomonitor 5. These sleep and respiratory parameters of the devices were compared, the results of which were double-checked by the designated sleep specialist.


RESULTS
The apnea-hypopnea index (AHI), apnea index, total number of apnea, and oxygen desaturation index obtained by the PSG and Apnomonitor 5 correlated significantly, whereas the averaged sleep time, total number of hypopnea, hypopnea index, and nadir oxygen saturation differed between the devices. The sensitivity of the Apnomonitor 5 versus PSG was 95% in the SAS patients with the AHI> or =15.


CONCLUSIONS
The Apnomonitor 5 can be a sensitive and useful screening device for SAS especially in patients with the AHI> or =15.
Yagi
Hidehito
H
Department of Otorhinolaryngology, Nagoya University Graduate School of Medicine, Showa, Aichi, Japan. h-yagi@city.inazawa.aichi.jp
Nakata
Seiichi
S
Tsuge
Hayato
H
Yasuma
Fumihiko
F
Noda
Akiko
A
Morinaga
Mami
M
Tagaya
Mitsuhiko
M
Nakashima
Tsutomu
T
D000328:Adult; D000368:Aged; D003362:Cost-Benefit Analysis; D004867:Equipment Design; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008403:Mass Screening / Q000295:instrumentation*; D008875:Middle Aged; D019095:Point-of-Care Systems; D017286:Polysomnography / Q000191:economics / Q000295:instrumentation*; D012680:Sensitivity and Specificity; D012891:Sleep Apnea Syndromes / Q000175:diagnosis*