Postural Variation of the Maximum Inspiratory and Expiratory Pressures in Normal Subjects

Fiz, J.A.; Texidó, Anna; Izquierdo, José Luis; Ruíz, Jordi; Roig, Jordi; Morera, J.

doi:10.1378/chest.97.2.313

Cited by 23 publications

(20 citation statements)

References 7 publications

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“…Reduced VC is an abnormality that is highly evident in patients with respiratory muscle weakness (11) or alterations in pulmonary mechanics that overload these muscles (1) . Although the importance of evaluating MRPs and VC has been well established in the literature, methodological variations and the degree of patient cooperation might interfere in the performance of the maneuver and affect measurements (2,7,12,13) . For both parameters, a rigid flanged mouthpiece, placed between the lips of the patient, is generally used, and the evaluation begins after the mouthpiece has been properly positioned and the pulmonary volume from the beginning of the maneuver has been established (2,12) .…”

Section: Introductionmentioning

confidence: 99%

“…Although the importance of evaluating MRPs and VC has been well established in the literature, methodological variations and the degree of patient cooperation might interfere in the performance of the maneuver and affect measurements (2,7,12,13) . For both parameters, a rigid flanged mouthpiece, placed between the lips of the patient, is generally used, and the evaluation begins after the mouthpiece has been properly positioned and the pulmonary volume from the beginning of the maneuver has been established (2,12) . Air leakage around the mouthpiece is a problem that has been encountered in some studies (7,14,15) , especially when evaluating patients with neuromuscular diseases or dental alterations that affect lip occlusion.…”

Section: Introductionmentioning

confidence: 99%

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Pressões respiratórias máximas e capacidade vital: comparação entre avaliações através de bocal e de máscara facial

Fiore

Paisani²,

Franceschini³

et al. 2004

J. bras. pneumol.

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Background: Measurement of maximal respiratory pressures and vital capacity are essential in evaluating respiratory function. However, methodological variations may interfere with the interpretation of results. Objective:To compare values obtained using mouthpiece and face-mask evaluation methods in the measurement of maximal respiratory pressures and vital capacity. Method:We studied 30 patients (16 male), with a mean age of 55.9 ± 15.7, in the preoperative phase of abdominal surgery. Maximal inspiratory pressure and maximal expiratory pressure, as well as vital capacity, were evaluated using either a rigid flanged mouthpiece or a face mask, in randomized order.Results: Evaluation with a face mask did not significantly alter vital capacity and maximal inspiratory pressure values, although maximal expiratory pressure values were significantly lower than when measured using a rigid mouthpiece. During measurement of maximal expiratory pressure, air leakage from around the mask was observed in 60% of cases. When maximal expiratory pressure measurements in which there was no such leakage were considered in isolation, face-mask values were higher than those obtained with the moutpiece Conclusion: With a face mask, maximal inspiratory pressure and vital capacity can be accurately evaluated. Maximal expiratory pressure can also be adequately evaluated using a face mask, provided that air leakage from the mask edges can be avoided. However, such leakage and the consequent reduction in the values obtained are common and limit the use of this method of evaluation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressões respiratórias máximas e capacidade vital: comparação entre avaliações através de bocal e de máscara facial

Fiore

Paisani²,

Franceschini³

et al. 2004

J. bras. pneumol.

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“…No entanto, Tomalak et al (18) , ao estudarem os participantes na posição sentada e em pé, não evidenciaram diferenças para os valores de PImáx e PEmáx nessas duas posições. Achados semelhantes foram encontrados por Fiz et al (20) , ao compararem os valores encontrados para as pressões respiratórias máximas nessas mesmas posturas.…”

Section: Discussionunclassified

Equações preditivas e valores de normalidade para pressões respiratórias máximas na infância e adolescência

Freitas¹,

Borja²,

Ferreira

et al. 2011

Rev. paul. pediatr.

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OBJETIVO: Pesquisar equações preditivas e valores de normalidade para pressões respiratórias máximas disponíveis na literatura para a faixa etária compreendida entre a infância e a adolescência. FONTES DE DADOS: Estudos publicados em inglês e em português no período entre 1980 e 2009. As bases de dados eletrônicas Lilacs e Medline foram consultadas utilizando-se as palavras-chave "capacidade respiratória máxima", "músculos respiratórios", "valores de referência", "adolescente" e "criança". SÍNTESE DOS DADOS: Foram incluídos oito artigos na revisão, totalizando 1.463 crianças e adolescentes avaliados. A faixa etária da população estudada variou de sete a 18 anos. Geralmente o indivíduo é avaliado na posição sentada e com um clipe nasal. Os esforços máximos são realizados a partir do volume residual e da capacidade pulmonar total e sustentados por um a três segundos. Valores de normalidade e equações de predição foram propostos em oito e dois estudos, respectivamente. Nestes, demonstra-se incremento nas pressões respiratórias máximas desde a infância à adolescência e a ocorrência de maiores valores de pressão expiratória máxima quando comparados à pressão inspiratória máxima em crianças e adolescentes de ambos os sexos. CONCLUSÕES: As pressões respiratórias máximas constituem um meio efetivo para avaliar a força muscular respiratória e diversos fatores contribuem para a grande variedade de equações preditivas e de valores de normalidade disponíveis. É preciso buscar um consenso para normatizar os métodos requeridos ao avaliar a força muscular respiratória em crianças e adolescentes.

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“…Measurements are obtained preferably in the sitting position. Although body posture has no significant influence on the result of the measurement in healthy subjects 47 , and even in convalescent neonates 48 , in COPD patients changes in body posture may significantly impact the result. Leaning forward for example may result in higher inspiratory pressures 49 while measurements obtained in the recumbent position may lead to lower pressures 50 .…”

Section: Maximum Voluntary Pressures Measured At the Mouthmentioning

confidence: 99%

Respiratory muscle assessment in acute exacerbation of chronic obstructive pulmonary disease and its role as a potential biomarker

Vimal¹,

Kolek²,

Jaskova³

2012

BIOMED PAP

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Background. AECOPD is a life threatening condition for patients with chronic obstructive pulmonary disease (COPD) and lack of specific biomarker hinders effective management. Sputum, blood, breath and urinary biomarkers have all been investigated. We measured maximum respiratory pressure post exacerbation once the patient was compliant with the test and after 6 weeks, to assess any correlations. Methods and Results. The maximum pressures were measured using a closed circuit spirometer with a clean rubber mouthpiece properly placed with the patients lips sealed around it. Patients were properly instructed to exhale slowly and completely, then inspire with maximum possible effort and advised to keep it for nearly 1.5 s for maximum inspiratory pressure (MIP). For maximum expiratory pressures (MEP) patients were instructed to inspire slowly and completely, then expire forcefully with maximum effort. With the recorded values TTI (time tension index) was calculated. This was repeated again after 6 weeks. Using Pearsons correlation coefficient we found that MIP had a negative correlation with TTI and a positive correlation with FEV1. FEV1 had a positive correlation with FVC. MEP showed no significant correlation with TTI, but a positive correlation with FEV1. Conclusion. Acute exacerbations of COPD has a profound effect on the respiratory musculature especially the expiratory muscles but the maximum pressures are not specific enough to be prognostic markers. It might be worthwhile studying transformations of the respiratory musculature at the molecular level. More studies must be conducted to find a specific marker to aid in the management of the condition.

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Postural Variation of the Maximum Inspiratory and Expiratory Pressures in Normal Subjects

Cited by 23 publications

References 7 publications

Pressões respiratórias máximas e capacidade vital: comparação entre avaliações através de bocal e de máscara facial

Pressões respiratórias máximas e capacidade vital: comparação entre avaliações através de bocal e de máscara facial

Equações preditivas e valores de normalidade para pressões respiratórias máximas na infância e adolescência

Respiratory muscle assessment in acute exacerbation of chronic obstructive pulmonary disease and its role as a potential biomarker

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