Automating the correction of flow integration drift during whole-body plethysmography

Détails

Ressource 1Télécharger: IEEE2020.pdf (2919.67 [Ko])
Etat: Public
Version: Final published version
Licence: Tous droits réservés
ID Serval
serval:BIB_9CE5102244CD
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Automating the correction of flow integration drift during whole-body plethysmography
Périodique
2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)
Auteur(s)
Stucky Frederic, Cazzaniga Giacomo, Aliverti Andrea, Kayser Bengt, Uva Barbara
ISBN
9781728119908
Statut éditorial
Publié
Date de publication
07/2020
Langue
anglais
Résumé
Prolonged measurement of total body volume vari- ations (deltaVb) with whole-body, flow-based plethysmography (WBP) results in a drift of the signal due to changes in temperature and humidity inside the plethysmograph and to numerical integration of the flow to obtain deltaVb. This drift has been previously corrected with the application of a wavelet- based filter using visual inspection of the signal to select the optimal filter level (Uva et al. Front. Physiol. 6:411, 2016), thus introducing potential operator bias. To exclude the latter we compared this approach with a newly developed automatic method based on (1) correction for actual changes in temper- ature and humidity inside the plethysmograph (algorithm TH) and (2) automatic selection of the wavelet filter level based on comparison between deltaVb and intra-thoracic and abdominal pressure variations measured simultaneously (algorithm WAV). The Pearson’s correlation coefficient between deltaVb and the changes in volume of the chest wall (deltaVcw) simultaneously obtained by optoelectronic plethysmography (OEP) was calcu- lated after correction of deltaVb with TH and WAV applied sep- arately, TH and WAV applied consecutively (TH+WAV), manual selection of a wavelet filter based on visual inspection (MAN) or no correction (CTRL). The correlation between deltaVb and deltaVcw increased marginally with WAV, TH+WAV and MAN compared to CTRL (P < 0.01). Conversely, TH alone yielded a lower correlation (P < 0.01). It follows that while the automated wavelet filter level selection method (WAV) represents an effective, operator-independent method for the correction of deltaVb, whether or not it is combined with specific correction for changes in thermodynamic conditions inside the plethysmograph, the manual method (MAN) yields satisfactory results without the constraints of intra-thoracic and abdominal pressure measurement.
Mots-clé
method, blood shift, plethysmography, OEP, exercise
Open Access
Oui
Création de la notice
04/09/2020 16:45
Dernière modification de la notice
18/09/2020 6:09
Données d'usage