Influence of posture, sex, and age on breathing pattern and chest wall motion in healthy subjects.

Autor: Mendes LPS; Rehabilitation Sciences Program, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil., Vieira DSR; Health Science Department, Universidade Federal de Santa Catarina (UFSC), Araranguá, SC, Brazil., Gabriel LS; Rehabilitation Sciences Program, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil., Ribeiro-Samora GA; Rehabilitation Sciences Program, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil., Dornelas De Andrade A; Department of Physical Therapy, Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil., Brandão DC; Department of Physical Therapy, Universidade Federal de Pernambuco (UFPE), Recife, PE, Brazil., Goes MC; PneumoCardioVascular Lab, Hospital Universitário Onofre Lopes - Empresa Brasileira de Serviços Hospitalares (HUOL/EBSERH), Department of Physical Therapy, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil., Fregonezi GAF; PneumoCardioVascular Lab, Hospital Universitário Onofre Lopes - Empresa Brasileira de Serviços Hospitalares (HUOL/EBSERH), Department of Physical Therapy, Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil., Britto RR; Department of Physical Therapy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil., Parreira VF; Department of Physical Therapy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil. Electronic address: veronicaparreira@yahoo.com.br.
Jazyk: angličtina
Zdroj: Brazilian journal of physical therapy [Braz J Phys Ther] 2020 May - Jun; Vol. 24 (3), pp. 240-248. Date of Electronic Publication: 2019 Mar 01.
DOI: 10.1016/j.bjpt.2019.02.007
Abstrakt: Objective: We evaluated the effects of posture, sex, and age on breathing pattern and chest wall motion during quiet breathing in healthy participants.
Methods: Eighty-three participants aged 42.72 (SD=21.74) years presenting normal pulmonary function were evaluated by optoelectronic plethysmography in the seated, inclined (with 45° of trunk inclination), and supine positions. This method allowed to assess the chest wall in a three dimensional way considering the chest wall as three compartments: pulmonary rib cage, abdominal rib cage and abdomen.
Results: Posture influenced all variables of breathing pattern and chest wall motion, except respiratory rate and duty cycle. Chest wall tidal volume and minute ventilation were reduced (p<0.05) in both sexes from seated to inclined and from seated to supine positions, mainly in males. Moreover, moving from seated to supine position significantly increased the percentage contribution of the abdomen to the tidal volume in both sexes (p<0.0001). Regarding sex, women showed higher contribution of thoracic compartment compared to men (p=0.008). Aging provided reductions on rib cage contributions to tidal volume that were compensated by increases of abdomen contributions (p<0.0001). In addition, increases in end-inspiratory and end-expiratory volumes over the years were observed.
Conclusion: The degree of contribution of chest wall compartments is dependent on posture, sex, and age. Therefore, verticalization increases expansion of pulmonary rib cage as well as horizontalization increases abdominal displacement. Women presented higher thoracic contribution to tidal volume than men. Aging reduces rib cage contributions to tidal volume that were compensated by increases of abdomen contributions.
(Copyright © 2019. Publicado por Elsevier Editora Ltda.)
Databáze: MEDLINE
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