PMID: 9648967Jul 2, 1998Paper

Forced oscillation technique for the evaluation of severe sleep apnoea/hypopnoea syndrome: a pilot study

The European Respiratory Journal
J R BadiaD Navajas

Abstract

The forced oscillation technique (FOT) is a noninvasive method of potential clinical interest for quantitatively assessing airway mechanics during sleep. We investigated the applicability of FOT as a diagnostic tool for noninvasive assessment of airflow obstruction in patients with sleep apnoea/hypopnoea syndrome (SAHS) during sleep. In seven patients previously diagnosed with severe SAHS (mean+/-SD apnoea/ hypopnoea index (AHI) 67+/-14) we performed a full polysomnography (PSG) together with on-line measurement of respiratory impedance (IZI) using FOT. For each patient we determined: 1) number of respiratory events conventionally detected by full PSG, those obtained by FOT and their degree of concordance; and 2) the characteristics and values of IZI during the respiratory events. FOT was well tolerated and easily applied in conjunction with a conventional sleep setup. The mean number of respiratory events x h(-1) detected by PSG and FOT were 55+/-16 and 58+/-17, respectively, with a strong concordance. IZI increased from a baseline of 11+/-4 to 50+/-20 cmH2O x L(-1) x s during apnoea (mean+/-SD). In all but one patient intermittent increases of IZI occurred immediately before each obstructive apnoea. In four patients, the incr...Continue Reading

Citations

Nov 20, 2001·Medical & Biological Engineering & Computing·D MacLeod, M Birch
Jul 5, 2003·Journal of Tongji Medical University = Tong Ji Yi Ke Da Xue Xue Bao·H LiuZ Zhang
Feb 28, 2002·Sleep & Breathing = Schlaf & Atmung·J M MontserratD Navajas
May 5, 2004·Respiratory Physiology & Neurobiology·Ching-Chi LinShwu-Fang Liaw
Aug 18, 2004·Sleep Medicine Reviews·J M Montserrat, J R Badia
Aug 18, 2004·Sleep Medicine Reviews·J Krieger
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Jul 22, 2008·Respiratory Physiology & Neurobiology·Ramon FarréDaniel Navajas
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Jun 13, 2003·Clinics in Chest Medicine·Francoise J Roux, Janet Hilbert

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