Determining respiratory system resistance and reactance by impulse oscillometry in obese individuals / Resistência e reatância do sistema respiratório por oscilometria de impulso em indivíduos obesos
J. bras. pneumol
; 41(5): 422-426, tab
Article
in English
| LILACS
| ID: lil-764573
Responsible library:
BR1.1
ABSTRACT
Objective:
To evaluate peripheral respiratory system resistance and reactance (Rrs and Xrs, respectively) in obese individuals.Methods:
We recruited 99 individuals, dividing them into four groups by body mass index (BMI) < 30.0 kg/m2 (control, n = 31); 30.0-39.9 kg/m2 (obesity, n = 13); 40.0-49.9 kg/m2 (severe obesity, n = 28); and ≥ 50.0 kg/m2 (morbid obesity, n = 13). Using impulse oscillometry, we measured total Rrs, central Rrs, and Xrs. Peripheral Rrs was calculated as the difference between total Rrs and central Rrs. All subjects also underwent spirometry.Results:
Of the 99 individuals recruited, 14 were excluded because they failed to perform forced expiratory maneuvers correctly during spirometry. The individuals in the severe obesity and morbid obesity groups showed higher peripheral Rrs and lower Xrs in comparison with those in the two other groups.Conclusions:
Having a BMI ≥ 40 kg/m2 was associated with a significant increase in peripheral Rrs and with a decrease in Xrs.RESUMO
Objetivo:
Avaliar a resistência do sistema respiratório (Rsr) periférica e a reatância (Xsr) em indivíduos obesos.Métodos:
Recrutamos 99 indivíduos, divididos em quatro grupos pelo índice de massa corpórea (IMC) < 30,0 kg/m2; (controle, n = 31); 30,0-39,9 kg/m2 (obesidade, n = 13); 40,0-49,9 kg/m2 (obesidade grave, n = 28); e ≥ 50,0 kg/m2 (obesidade mórbida, n = 13). Utilizando oscilometria de impulso, foram mensuradas Rsr total, Rsr central, Xsr. A Rsr periférica foi calculada como a diferença entre Rsr total e Rsr central. Todos os indivíduos também foram submetidos a espirometria.Resultados:
Entre os 99 indivíduos recrutados, 14 foram excluídos por incapacidade de executar corretamente as manobras expiratórias forçadas na espirometria. Os indivíduos dos grupos obesidade grave e obesidade mórbida apresentaram aumento da Rsr periférica e redução da Xsr quando comparados aos dos outros grupos.Conclusões:
Ter IMC ≥ 40 kg/m2 associou-se com aumento significativo da Rsr periférica e redução da Xsr.
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Respiratory Physiological Phenomena
/
Obesity
Type of study:
Observational study
/
Risk factors
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
English
Journal:
J. bras. pneumol
Journal subject:
Pulmonary Disease (Specialty)
Year:
2015
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal de Pernambuco/BR