A Comparative Study of Readings by Portable Monitor and Polysomnography (PSG) in Patients of Sleep Apnea Syndrome (SAS)

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  • Ito Keiko
    Department of Otorhinolaryngology, Nishinihon Hospital

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  • 睡眠時無呼吸症候群における簡易検査と終夜睡眠ポリグラフ検査の比較検討
  • スイミンジ ムコキュウ ショウコウグン ニ オケル カンイ ケンサ ト シュウヤ スイミン ポリグラフ ケンサ ノ ヒカク ケントウ

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We examined the apnea-hypopnea index (AHI) readings of 67 patients who demonstrated symptoms of sleep-disordered breathing as measured by both a portable monitor and polysomnography (PSG) between April 2011 and September 2015. There was a positive correlation between the AHI readings in severe SAS cases, but no correlation in the mild or moderate SAS cases. Although there was a correlation between the respective apnea index (AI) measurements, there was no correlation with respect to hypopnea index (HI) readings. Applying the classifications of AASM, there was a more significant correlation between AHI readings by PSG than by portable monitor for type 3 as compared to type 4. Even when the AHI readings of SAS cases are low using a portable monitor, we should consider use of PSG when patients have symptoms of excessive daytime sleepiness or complications such as cardiovascular disease or apoplexy.

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