A Compound Cantilevered Plate Model of the Palate-Uvula System during Snoring
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Flow-induced vibration of the soft tissues of the upper airway is at the origin of snoring noise. For most habitual snorers, the passive motion of the soft palate and its conic projection, the uvula, located at the back of the roof of the mouth, is the main cause of the sleep-related breathing disorder. The flow-induced oscillations of the uvulopalatal system may be modelled using a compound cantilevered flexible plate in a mean channel flow. A parametric study characterises the influence of the mechanical properties of the soft palate and uvula, as well as their relative length, on the flutter-type aeroelastic instability of the plate motion. Results confirm that longer uvulae with typical anatomi- cal properties tend to increase the instability of the FSI system. Further, they show that only much heavier and stiffer uvulae can stabilise the uvulopalatal system and suggest that the tissue properties have to be altered considerably on a large portion of the soft palate to prevent snoring.
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Elliott, Novak; Lucey, Anthony; Eastwood, P.; Hillman, D.; Heil, M. (2011)Snoring noise is generated by vibration of the soft tissues of the upper airway, principally those that form the back of the roof of the mouth (the soft palate) and its conical extension (the uvula). In addition to discord ...
Elliott, Novak; Lucey, Anthony; Heil, M (2010)Obstructive breathing disorders, such as sleep apnoea and snoring, interfere with normal respiration and sleep, reducing brain-oxygen saturation and are linked with hypertension and heart failure. The mechanics of the ...
Large-Amplitude Oscillations of a Finite-Thickness Cantilevered Flexible Plate in Viscous Channel FlowElliott, Novak; Lucey, Anthony; Heil, M. (2010)The broad aim of the present work is to elucidate mechanisms of obstructive breathing disorders (snoring, sleep apnea) in which flow-induced instabilities of the soft palate feature. We use the well-established analogue ...