Dynamic magnetic resonance imaging provides insight into upper airway mechanics in obstructive sleep apnoea

Brennick, Michael J.

doi:10.1113/jp278970

Cited by 1 publication

(1 citation statement)

References 5 publications

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“…Some previous studies have performed FSI studies in pharyngeal models without uvula 9 – 12 . They found a prominent deformation on the oropharynx during inhalation with different breath patterns (etc., the mouth breathing and nose breathing), consistent with Brennick’s medical report 13 . However, as the repeated large vibrations of the uvula can cause snoring by obstructing breathing 14 , the uvula’s aerodynamic role should also be considered for FSI analysis in upper airway studies.…”

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confidence: 86%

Computational fluid–structure interaction analysis of flapping uvula on aerodynamics and pharyngeal vibration in a pediatric airway

Chen

Feng

Shi

et al. 2023

Sci Rep

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The uvula flapping is one of the most distinctive features of snoring and is critical in affecting airway aerodynamics and vibrations. This study aimed to elucidate the mechanism of pharyngeal vibration and pressure fluctuation due to uvula flapping employing fluid–structure interaction simulations. The followings are the methodology part: we constructed an anatomically accurate pediatric pharynx model and put attention on the oropharynx region where the greatest level of upper airway compliance was reported to occur. The uvula was assumed to be a rigid body with specific flapping frequencies to guarantee proper boundary conditions with as little complexity as possible. The airway tissue was considered to have a uniform thickness. It was found that the flapping frequency had a more significant effect on the airway vibration than the flapping amplitude, as the flapping uvula influenced the pharyngeal aerodynamics by altering the jet flow from the mouth. Breathing only through the mouth could amplify the effect of flapping uvula on aerodynamic changes and result in more significant oropharynx vibration.

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