Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure

Detalhes bibliográficos
Autor(a) principal: Lu, Qin
Data de Publicação: 2022
Outros Autores: R.R. Vieira, Silvia, Richecoeur, Jack, Puybasset, Louis, Kalfon, Pierre, Coriat, Pierre, Rouby, Jean-Jacques
Tipo de documento: Artigo
Idioma: por
Título da fonte: Clinical and Biomedical Research
Texto Completo: https://seer.ufrgs.br/index.php/hcpa/article/view/125245
Resumo: OBJECTIVE: Measurement of respiratory compliance based on pressure-volume curves are advocated for assessing the severity of acute respiratory failure. Theaim of the present study was to compare different methods of obtaining pressure volume curves and to evaluate their reproducibility and reliability.MATERIALS AND METHODS: Thoracopulmonary, pulmonary and thoracic pressurevolume curves were obtained in 14 patients and compared using three different methods: supersyringe method, inspiratory occlusions method and constant-flow method, using two different flows: 3 and 9 l.min-1. The slope of the curves, the values of static compliance and upper and lower inflection points, when present, were evaluated.RESULTS: The analysis of the pressure-volume curves through the three different methods showed that the curves obtained using a constant 3 l.min-1 flow weresuperimposable to the ones obtained using the supersyringe and inspiratory occlusions. Curves obtained using the 9 l.min-1 flow method were associated with aslight rightward shift. However, the values of static respiratory compliance and lower inflection points were similar for all patients regardless of the method, allowing the identification of patients with and without lower inflection points.CONCLUSIONS: The evaluation of pressure-volume curves, by any of the tested methods, in patients with acute respiratory failure, allows the evaluation of the values of static respiratory compliance and points of lower inflection, as well as their division into two groups, according to the presence or absence of points
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spelling Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failureComparação de três métodos para medida das curvas de complacência em pacientes com insuficiência respiratória agudaLesão pulmonar agudasíndrome da angústia respiratória agudacurvas pressão-volumecomplacência estáticaponto de inflexão inferiorponto de inflexão superiorAcute respiratory failuracute respiratory distress syndromepressurevolume curvesstatic compliancelower inflection poinupper inflection pointOBJECTIVE: Measurement of respiratory compliance based on pressure-volume curves are advocated for assessing the severity of acute respiratory failure. Theaim of the present study was to compare different methods of obtaining pressure volume curves and to evaluate their reproducibility and reliability.MATERIALS AND METHODS: Thoracopulmonary, pulmonary and thoracic pressurevolume curves were obtained in 14 patients and compared using three different methods: supersyringe method, inspiratory occlusions method and constant-flow method, using two different flows: 3 and 9 l.min-1. The slope of the curves, the values of static compliance and upper and lower inflection points, when present, were evaluated.RESULTS: The analysis of the pressure-volume curves through the three different methods showed that the curves obtained using a constant 3 l.min-1 flow weresuperimposable to the ones obtained using the supersyringe and inspiratory occlusions. Curves obtained using the 9 l.min-1 flow method were associated with aslight rightward shift. However, the values of static respiratory compliance and lower inflection points were similar for all patients regardless of the method, allowing the identification of patients with and without lower inflection points.CONCLUSIONS: The evaluation of pressure-volume curves, by any of the tested methods, in patients with acute respiratory failure, allows the evaluation of the values of static respiratory compliance and points of lower inflection, as well as their division into two groups, according to the presence or absence of pointsOBJETIVO: As medidas da complacência respiratória, a partir das curvas pressãovolume, são indicadas para avaliar a gravidade da insuficiência respiratória aguda.O objetivo do presente estudo foi comparar diferentes métodos de obtenção das curvas pressão-volume e avaliar sua reprodutibilidade e fidedignidade.MATERIAIS E MÉTODOS: As curvas pressão-volume toracopulmonares, pulmonares e torácicas foram comparadas em 14 pacientes com IRA por três métodos diferentes: a técnica da superseringa, a das oclusões inspiratórias e um novo método automatizado, utilizando fluxos contínuos de 3 e de 9 l.min-1. Foram avaliadas a forma das curvas, bem como os valores de complacência estática e dos pontos de inflexão inferior e superior, quando presentes.RESULTADOS: A análise das curvas pressão-volume pelos diferentes métodos revelou que as curvas obtidas com o método constante de 3 l.min-1 foram superponíveis às obtidas pelos métodos da superseringa e das oclusões inspiratórias, enquanto que com o método de 9 l.min-1 houve um discreto desvio para a direita. Apesar disso, as medidas de complacência estática e os valores dos pontos de inflexão inferior foram semelhantes em todos os métodos, permitindo, todos eles, a identificação de pacientes com e sem pontos de inflexão inferior.CONCLUSÕES: A avaliação das curvas pressão volume em portadores de insuficiência respiratória aguda, por qualquer um dos métodos testados, permite avaliar os valores de complacência estática e de pontos de inflexão inferior, e dividi-los em dois grupos, de acordo com a presença ou ausência de pontos.HCPA/FAMED/UFRGS2022-06-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPeer-reviewed ArticleAvaliado por Paresapplication/pdfhttps://seer.ufrgs.br/index.php/hcpa/article/view/125245Clinical & Biomedical Research; Vol. 19 No. 3 (1999): Revista HCPAClinical and Biomedical Research; v. 19 n. 3 (1999): Revista HCPA2357-9730reponame:Clinical and Biomedical Researchinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSporhttps://seer.ufrgs.br/index.php/hcpa/article/view/125245/85181http://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessLu, Qin R.R. Vieira, SilviaRichecoeur, Jack Puybasset, Louis Kalfon, PierreCoriat, Pierre Rouby, Jean-Jacques 2022-09-16T16:32:52Zoai:seer.ufrgs.br:article/125245Revistahttps://www.seer.ufrgs.br/index.php/hcpaPUBhttps://seer.ufrgs.br/index.php/hcpa/oai||cbr@hcpa.edu.br2357-97302357-9730opendoar:2022-09-16T16:32:52Clinical and Biomedical Research - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.none.fl_str_mv Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
Comparação de três métodos para medida das curvas de complacência em pacientes com insuficiência respiratória aguda
title Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
spellingShingle Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
Lu, Qin
Lesão pulmonar aguda
síndrome da angústia respiratória aguda
curvas pressão-volume
complacência estática
ponto de inflexão inferior
ponto de inflexão superior
Acute respiratory failur
acute respiratory distress syndrome
pressurevolume curves
static compliance
lower inflection poin
upper inflection point
title_short Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
title_full Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
title_fullStr Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
title_full_unstemmed Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
title_sort Comparison of three methods for measuring pressure-volume curves in patients with acute respiratory failure
author Lu, Qin
author_facet Lu, Qin
R.R. Vieira, Silvia
Richecoeur, Jack
Puybasset, Louis
Kalfon, Pierre
Coriat, Pierre
Rouby, Jean-Jacques
author_role author
author2 R.R. Vieira, Silvia
Richecoeur, Jack
Puybasset, Louis
Kalfon, Pierre
Coriat, Pierre
Rouby, Jean-Jacques
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Lu, Qin
R.R. Vieira, Silvia
Richecoeur, Jack
Puybasset, Louis
Kalfon, Pierre
Coriat, Pierre
Rouby, Jean-Jacques
dc.subject.por.fl_str_mv Lesão pulmonar aguda
síndrome da angústia respiratória aguda
curvas pressão-volume
complacência estática
ponto de inflexão inferior
ponto de inflexão superior
Acute respiratory failur
acute respiratory distress syndrome
pressurevolume curves
static compliance
lower inflection poin
upper inflection point
topic Lesão pulmonar aguda
síndrome da angústia respiratória aguda
curvas pressão-volume
complacência estática
ponto de inflexão inferior
ponto de inflexão superior
Acute respiratory failur
acute respiratory distress syndrome
pressurevolume curves
static compliance
lower inflection poin
upper inflection point
description OBJECTIVE: Measurement of respiratory compliance based on pressure-volume curves are advocated for assessing the severity of acute respiratory failure. Theaim of the present study was to compare different methods of obtaining pressure volume curves and to evaluate their reproducibility and reliability.MATERIALS AND METHODS: Thoracopulmonary, pulmonary and thoracic pressurevolume curves were obtained in 14 patients and compared using three different methods: supersyringe method, inspiratory occlusions method and constant-flow method, using two different flows: 3 and 9 l.min-1. The slope of the curves, the values of static compliance and upper and lower inflection points, when present, were evaluated.RESULTS: The analysis of the pressure-volume curves through the three different methods showed that the curves obtained using a constant 3 l.min-1 flow weresuperimposable to the ones obtained using the supersyringe and inspiratory occlusions. Curves obtained using the 9 l.min-1 flow method were associated with aslight rightward shift. However, the values of static respiratory compliance and lower inflection points were similar for all patients regardless of the method, allowing the identification of patients with and without lower inflection points.CONCLUSIONS: The evaluation of pressure-volume curves, by any of the tested methods, in patients with acute respiratory failure, allows the evaluation of the values of static respiratory compliance and points of lower inflection, as well as their division into two groups, according to the presence or absence of points
publishDate 2022
dc.date.none.fl_str_mv 2022-06-14
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
Avaliado por Pares
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.ufrgs.br/index.php/hcpa/article/view/125245
url https://seer.ufrgs.br/index.php/hcpa/article/view/125245
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.ufrgs.br/index.php/hcpa/article/view/125245/85181
dc.rights.driver.fl_str_mv http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv HCPA/FAMED/UFRGS
publisher.none.fl_str_mv HCPA/FAMED/UFRGS
dc.source.none.fl_str_mv Clinical & Biomedical Research; Vol. 19 No. 3 (1999): Revista HCPA
Clinical and Biomedical Research; v. 19 n. 3 (1999): Revista HCPA
2357-9730
reponame:Clinical and Biomedical Research
instname:Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
instname_str Universidade Federal do Rio Grande do Sul (UFRGS)
instacron_str UFRGS
institution UFRGS
reponame_str Clinical and Biomedical Research
collection Clinical and Biomedical Research
repository.name.fl_str_mv Clinical and Biomedical Research - Universidade Federal do Rio Grande do Sul (UFRGS)
repository.mail.fl_str_mv ||cbr@hcpa.edu.br
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