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Tytuł pozycji:

After-Effects of Thixotropic Maneuvers on Chest Wall and Compartmental Operational Volumes of Healthy Subjects Using Optoelectronic Plethysmography

Tytuł :
After-Effects of Thixotropic Maneuvers on Chest Wall and Compartmental Operational Volumes of Healthy Subjects Using Optoelectronic Plethysmography
Autorzy :
Illia Nadinne Dantas Florentino Lima
Antonio Sarmento
Maria Clara Goes
Enrico Mazzuca
Antonella Lomauro
W. Darlene Reid
Andrea Aliverti
Guilherme Augusto De Freitas Fregonezi
Pokaż więcej
Temat :
optoelectronic plethysmography
lung volume measurements
lung capacities
muscle thixotropy
respiratory muscles
Physiology
QP1-981
Źródło :
Frontiers in Physiology, Vol 10 (2019)
Wydawca :
Frontiers Media S.A., 2019.
Rok publikacji :
2019
Kolekcja :
LCC:Physiology
Typ dokumentu :
article
Opis pliku :
electronic resource
Język :
English
ISSN :
1664-042X
Relacje :
https://www.frontiersin.org/article/10.3389/fphys.2019.01376/full; https://doaj.org/toc/1664-042X
DOI :
10.3389/fphys.2019.01376
Dostęp URL :
https://doaj.org/article/e82bfe39dfe9425a8120e597393c574e
Numer akcesji :
edsdoj.82bfe39dfe9425a8120e597393c574e
Czasopismo naukowe
The volumes assessed by optoelectronic plethysmography (OEP) and based on a three-compartmental model provide an accurate breath-by-breath index of expiratory and inspiratory (ribcage muscles and diaphragm) muscle length. Thus, after performing thixotropic maneuvers, OEP may also provide evidence regarding the history-dependent properties of these muscles. We studied the after-effects of different thixotropic conditionings on chest wall (CW) and compartmental operational volumes of 28 healthy subjects (25.5 ± 2.2 years, FVC%pred 94.8 ± 5.5, and FEV1%pred 95.5 ± 8.9) using OEP. Conditionings were composed of inspiratory or expiratory contractions performed from total lung capacity (TLC) or residual volume (RV). The study protocol was composed of three consecutive contractions of the same maneuver, with 60 s of spontaneous breathing in between, and after-effects were studied in the first seven respiratory cycles of each contraction. Cumulative effects were also assessed by comparing the after-effects of each thixotropic maneuver. Inspiratory contractions performed from both TLC and RV acutely increased end-inspiratory (EIV) CW volumes (all p < 0.0001), mainly on both upper and lower ribcage compartments (i.e., non-diaphragmatic inspiratory muscles and diaphragm, respectively); while, expiratory contractions from RV decreased CW volumes (p < 0.0001) by reducing the upper ribcage and abdominal volumes (all p < 0.0001). The response of the thixotropic maneuvers did not present a cumulative effect. In healthy, the use of the three-compartmental model through OEP allows a detailed assessment of the diaphragm, inspiratory and expiratory muscle thixotropy. Furthermore, specific conditioning maneuvers led to thixotropy of the inspiratory ribcage, diaphragm, and expiratory muscles.

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