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Binazzi B.,Section of Respiratory Rehabilitation | Innocenti Bruni G.,Section of Respiratory Rehabilitation | Coli C.,Section of Respiratory Rehabilitation | Romagnoli I.,Section of Respiratory Rehabilitation | And 5 more authors.
Respiratory Physiology and Neurobiology | Year: 2012

Quantifying chest wall kinematics and rib cage distortion during ventilatory effort in subjects with Pectus excavatum (PE) has yet to be defined. We studied 24 patients: 19 during maximal voluntary ventilation (MVV) and 5 during MVV and cycling exercise (CE). By optoelectronic plethysmography (OEP) we assessed operational volumes in upper rib cage, lower rib cage and abdomen. Ten age-matched healthy subjects served as controls. Patients exhibited mild restrictive lung defect. During MVV end-inspiratory and end-expiratory volumes of chest wall compartments increased progressively in controls, whereas most patients avoided dynamic hyperinflation by setting operational volumes at values lower than controls. Mild rib cage distortion was found in three patients at rest, but neither in patients nor in controls did MVV or CE consistently affect coordinated motion of the rib cage. Rib cage displacement was not correlated with a CT-scan severity index. Conclusions, mild rib cage distortion rarely occurs in PE patients with mild restrictive defect. OEP contributes to clinical evaluation of PE patients. © 2011 Elsevier B.V.


Binazzi B.,Section of Respiratory Rehabilitation | Innocenti Bruni G.,Section of Respiratory Rehabilitation | Gigliotti F.,Section of Respiratory Rehabilitation | Coli C.,Section of Respiratory Rehabilitation | And 5 more authors.
Respiratory Physiology and Neurobiology | Year: 2012

No data are available on the effects of the Nuss procedure on volumes of chest wall compartments (the upper rib cage, lower rib cage and abdomen) in adolescents with pectus excavatum. We used optoelectronic plethysmography to provide a quantitative description of chest wall kinematics before and 6. months after the Nuss procedure at rest and during maximal voluntary ventilation in 13 subjects with pectus excavatum. An average 11% increase in chest wall volume was accommodated within the upper rib cage (. p=. 0.0001) and to a lesser extent within the abdomen and lower rib cage. Tidal volumes did not significantly change during the study. The repair effect on chest wall kinematics did not correlate with the Haller index of deformity at baseline. Six months of the Nuss procedure do increase chest wall volume without affecting chest wall displacement and rib cage configuration. © 2012 Elsevier B.V.

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