snoring and obstructive sleep apnea

打呼噜和呼吸道疾病的统计研究

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Title:
Dynamics of snoring sounds and its connection with obstructive sleep apnea

Authors:
Alencar, AM; da Silva, DGV; Oliveira, CB; Vieira, AP; Moriya, HT;
Lorenzi, G

Source:
*PHYSICA A*-STATISTICAL MECHANICS AND ITS APPLICATIONS, 392 (1):271-277; JAN 1 2013

Abstract:
Snoring is extremely common in the general population and when irregular
may indicate the presence of obstructive sleep apnea. We analyze the
overnight sequence of wave packets - the snore sound - recorded during
full polysomnography in patients referred to the Sleep Laboratory due to
suspected obstructive sleep apnea. We hypothesize that irregular snore,
with duration in the range between 10 and 100 s, correlates with
respiratory obstructive events. We find that the number of irregular
snores - easily accessible, and quantified by what we call the snore
time interval index (STII) - is in good agreement with the well-known
apnea-hypopnea index, which expresses the severity of obstructive sleep
apnea and is extracted only from polysomnography. In addition, the Hurst
analysis of the snore sound itself, which calculates the fluctuations in
the signal as a function of time interval, is used to build a classifier
that is able to distinguish between patients with no or mild apnea and
patients with moderate or severe apnea. (C) 2012 Elsevier B.V. All
rights reserved.