Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3794
Título: Analysis of the respiratory dynamics during normal breathing by means of pseudo phase plots and pressure-volume loops
Autor: Ionescu, Clara M.
Machado, J. A. Tenreiro
Keyser, Robin De
Palavras-chave: Correlation
Forced oscillation
Fractal dimension
Geometrical mapping
Homothety factor
Lung function test
Phase plot
Respiratory impedance
Data: 2013
Editora: IEEE
Relatório da Série N.º: IEEE Transactions on Systems Man and Cybernetics: Systems; Vol. 43, Issue 1
Resumo: This paper reports on the analysis of tidal breathing patterns measured during noninvasive forced oscillation lung function tests in six individual groups. The three adult groups were healthy, with prediagnosed chronic obstructive pulmonary disease, and with prediagnosed kyphoscoliosis, respectively. The three children groups were healthy, with prediagnosed asthma, and with prediagnosed cystic fibrosis, respectively. The analysis is applied to the pressure–volume curves and the pseudophaseplane loop by means of the box-counting method, which gives a measure of the area within each loop. The objective was to verify if there exists a link between the area of the loops, power-law patterns, and alterations in the respiratory structure with disease. We obtained statistically significant variations between the data sets corresponding to the six groups of patients, showing also the existence of power-law patterns. Our findings support the idea that the respiratory system changes with disease in terms of airway geometry and tissue parameters, leading, in turn, to variations in the fractal dimension of the respiratory tree and its dynamics.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3794
ISSN: 2168-2216
Versão do Editor: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6163414
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