PMID: 9192942Jun 1, 1997Paper

A system to generate simultaneous forced oscillation and continuous positive airway pressure

The European Respiratory Journal
R FarréD Navajas

Abstract

Assessment of airway obstruction in patients with obstructive sleep apnoea (OSA) subjected to continuous positive airway pressure (CPAP) may be carried out using the forced oscillation technique (FOT). To facilitate routine application of forced oscillation (FO) in sleep studies, our aim was to design a system capable of generating CPAP and applying FOT simultaneously. We constructed a prototype CPAP + FO generator by connecting a specially designed electromagnetic valve in parallel with a conventional blower. The capacity of the prototype to generate forced oscillation (5 Hz +/- 1 hPa) was tested by connecting it to a model simulating spontaneous breathing. The response of the prototype for target CPAPs of 5, 10 and 15 hPa and imposed sinusoidal breathing with peak flow up to 0.75 L x s(-1) was excellent when compared with that reported for commercially available CPAP generators. The applicability of the prototype was tested by applying it to assess airway obstruction in four patients with OSA during sleep. We conclude that the generator designed is able to apply continuous positive airway pressure and forced oscillation simultaneously. The system could be useful for automatic and noninvasive assessment of airway obstruction i...Continue Reading

Citations

Dec 1, 2011·Annals of Biomedical Engineering·Lisa M CampanaA Malhotra
Mar 15, 2002·Sleep & Breathing = Schlaf & Atmung·Katrin PilzPeter Dorow
May 29, 1998·American Journal of Respiratory and Critical Care Medicine·D NavajasJ M Montserrat
Nov 11, 1999·American Journal of Respiratory and Critical Care Medicine·J R BadiaJ M Montserrat
Mar 20, 2001·American Journal of Respiratory and Critical Care Medicine·W J RanderathK H Rühle
Apr 3, 2001·American Journal of Respiratory and Critical Care Medicine·M YounesD Roberts
Sep 11, 2001·American Journal of Respiratory and Critical Care Medicine·R FarréD Navajas
Feb 15, 2001·Critical Care : the Official Journal of the Critical Care Forum·D Navajas, R Farré
Apr 19, 2003·Biomedizinische Technik. Biomedical Engineering·J H FickerE G Hahn
Oct 21, 2011·Critical Reviews in Biomedical Engineering·David W Kaczka, Raffaele L Dellacá
Jul 22, 2008·Respiratory Physiology & Neurobiology·Ramon FarréDaniel Navajas
Nov 14, 1997·IEEE Transactions on Bio-medical Engineering·R FarréD Navajas
Oct 10, 2015·Sleep & Breathing = Schlaf & Atmung·Chris D TurnbullJohn R Stradling
Oct 18, 2001·Pulmonary Pharmacology & Therapeutics·M D Goldman
Jun 6, 1998·Medical & Biological Engineering & Computing·P L de MeloA Giannella-Neto
Jun 1, 2000·Medical & Biological Engineering & Computing·P L de MeloA Giannella-Neto
Jun 8, 2002·Physiological Measurement·J C T PepperellJ R Stradling
May 7, 2002·The Journal of Asthma : Official Journal of the Association for the Care of Asthma·Abraham B BohadanaDan B Teculescu

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