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Research ArticleOriginal Research

Effects of Inspiratory Exercise With Linear and Nonlinear Load on Respiratory Variables Post-Bariatric Surgery

Eli Maria Pazzianotto-Forti, Carolina Moraes da Costa Munno, Daniela Faleiros Bertelli Merino, Maura Rigoldi Simões da Rocha, Tamires Alessa de Mori and Irineu Rasera Júnior
Respiratory Care December 2019, 64 (12) 1516-1522; DOI: https://doi.org/10.4187/respcare.05841
Eli Maria Pazzianotto-Forti
Graduate Program in Physical Therapy and Human Movement Sciences, School of Health Sciences, Universidade Metodista de Piracicaba, Piracicaba, São Paulo, Brazil.
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  • For correspondence: eli.forti@unimep.br
Carolina Moraes da Costa Munno
Graduate Program in Physical Therapy and Human Movement Sciences, School of Health Sciences, Universidade Metodista de Piracicaba, Piracicaba, São Paulo, Brazil.
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Daniela Faleiros Bertelli Merino
Graduate Program in Physical Therapy and Human Movement Sciences, School of Health Sciences, Universidade Metodista de Piracicaba, Piracicaba, São Paulo, Brazil.
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Maura Rigoldi Simões da Rocha
Graduate Program in Physical Therapy and Human Movement Sciences, School of Health Sciences, Universidade Metodista de Piracicaba, Piracicaba, São Paulo, Brazil.
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Tamires Alessa de Mori
Graduate Program in Physical Therapy and Human Movement Sciences, School of Health Sciences, Universidade Metodista de Piracicaba, Piracicaba, São Paulo, Brazil.
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Irineu Rasera Júnior
Center of Gastroenterology and Obesity Surgery of Piracicaba, Piracicaba, São Paulo, Brazil.
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Abstract

BACKGROUND: Obesity leads to changes in respiratory function, causing reduced lung volumes and mechanical disadvantage of the respiratory muscles. We sought to evaluate the effect of breathing exercises using devices that impose linear and nonlinear load on reversing diaphragm dysfunction and the prevalence of atelectasis after bariatric surgery.

METHODS: This was a blind randomized clinical trial. Preoperatively, we assessed the subjects' maximum inspiratory pressure by measuring nasal inspiratory pressure and respiratory muscle endurance with an incremental test based on sustained maximum inspiratory pressure (sustained PImax) and the prevalence of atelectasis by chest radiograph. Subjects were then randomized into 2 groups: a linear load pressure group and nonlinear load pressure group; both groups received conventional respiratory physiotherapy. Subjects were reassessed on the second day after bariatric surgery.

RESULTS: We included 40 morbidly obese women (body mass index > 40 kg/m2), age 25–55 years, who underwent bariatric surgery by laparotomy. The groups were homogeneous with respect to age (P = .11), body mass (P = .12), height (P = .75), body mass index (P = .75), nasal inspiratory pressure (P = .48), sustained PImax (P = .89), and absence of atelectasis at baseline. In the reassessment, both groups showed significant reduction in nasal inspiratory pressure (P < .001) and maintenance of sustained PImax (linear load pressure P = .51; nonlinear load pressure P = .055). The prevalence of atelectasis was 15% for linear load pressure and 25% for nonlinear load pressure, with no significant difference between groups (P = .69).

CONCLUSION: Both groups were able to maintain respiratory muscle endurance after bariatric surgery. In addition, the treatment contributed to controlling atelectasis so that it did not cause clinical repercussions to the subjects. (ClinicalTrials.gov registration NCT02298517).

  • postoperative period
  • physical therapy specialty
  • breathing exercises
  • respiratory muscle
  • obesity
  • gastroplasty

Footnotes

  • Correspondence: Eli Maria Pazzianotto-Forti PhD, Rodovia do Açúcar, km 156 (SP-308), 13.423-170, Piracicaba, São Paulo, Brazil. E-mail: eli.forti{at}unimep.br.
  • The authors have disclosed relationships with Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPQ).

  • Copyright © 2019 by Daedalus Enterprises
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Respiratory Care: 64 (12)
Respiratory Care
Vol. 64, Issue 12
1 Dec 2019
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Effects of Inspiratory Exercise With Linear and Nonlinear Load on Respiratory Variables Post-Bariatric Surgery
Eli Maria Pazzianotto-Forti, Carolina Moraes da Costa Munno, Daniela Faleiros Bertelli Merino, Maura Rigoldi Simões da Rocha, Tamires Alessa de Mori, Irineu Rasera Júnior
Respiratory Care Dec 2019, 64 (12) 1516-1522; DOI: 10.4187/respcare.05841

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Effects of Inspiratory Exercise With Linear and Nonlinear Load on Respiratory Variables Post-Bariatric Surgery
Eli Maria Pazzianotto-Forti, Carolina Moraes da Costa Munno, Daniela Faleiros Bertelli Merino, Maura Rigoldi Simões da Rocha, Tamires Alessa de Mori, Irineu Rasera Júnior
Respiratory Care Dec 2019, 64 (12) 1516-1522; DOI: 10.4187/respcare.05841
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Keywords

  • postoperative period
  • physical therapy specialty
  • breathing exercises
  • respiratory muscle
  • obesity
  • gastroplasty

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