Reference Values of Maximal Respiratory Mouth Pressures: A Population-based Study

Bruschi, C.; Cerveri, Isa; Zoia, M. C.; Fanfulla, Francesco; Fiorentini, Marilina; Casali, Lucio; Grassi, Mario; Grassi, C

doi:10.1164/ajrccm/146.3.790

Cited by 157 publications

(130 citation statements)

References 4 publications

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“…Both smokers and nonsmokers were included in this study. In line with the literature on reference values [4,5,7,8], smoking status was not significant in predicted values of MIP and MEP.…”

Section: Discussionsupporting

confidence: 90%

“…Portable devices are useful for rapid and simple assessment of respiratory function in the office and at the bedside. Prediction values of spirometry and maximal respiratory pressures are available for portable and nonportable devices with a standard tube or a flanged type of mouthpiece connection [4][5][6][7][8]. This equipment is only suitable for subjects capable of making a good seal with their lips around the mouthpiece.…”

mentioning

confidence: 99%

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Face mask spirometry and respiratory pressures in normal subjects

Wohlgemuth¹,

Kooi²,

Hendriks³

et al. 2003

European Respiratory Journal

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Spirometry and maximal respiratory pressures are pulmonary function parameters commonly used to evaluate respiratory function. Prediction values are available for conventional lung function devices using a standard tube or flanged type of mouthpiece connection. This equipment is not suitable for patients with facial or buccal muscle weakness, because of air leakage around the mouthpiece. A face mask was used for the portable lung function devices used in the neuromuscular department.The aim of this study was to compare the face mask and the conventional mouthpiece for the measurement of spirometry and of respiratory pressures in 22 healthy subjects.Values obtained with the conventional mouthpiece differed significantly from values obtained with the face mask. With the mask, forced vital capacity and forced expiratory volume in one second were 200 mL lower, and maximal expiratory pressure was 3.2 kPa lower than with the mouthpiece. Subsequently, new prediction values for face mask spirometry and maximal respiratory pressures were obtained from 252 other healthy subjects, from which new prediction equations were derived.It was concluded that the face mask connection to the lung function device is a valid alternative, is easy to use and is most useful to monitor changes in patients. This study confirms the importance of appropriate prediction equations, depending on subjectinstrument interfaces. Measurement of vital capacity (VC) and maximal respiratory pressures is commonly used to evaluate respiratory function and respiratory muscle strength in patients with chronic obstructive pulmonary disease or neuromuscular diseases [1][2][3]. Portable devices are useful for rapid and simple assessment of respiratory function in the office and at the bedside. Prediction values of spirometry and maximal respiratory pressures are available for portable and nonportable devices with a standard tube or a flanged type of mouthpiece connection [4][5][6][7][8]. This equipment is only suitable for subjects capable of making a good seal with their lips around the mouthpiece. However, patients with neuromuscular diseases characterised by facial or bulbar muscle weakness, e.g. amyotrophic lateral sclerosis, myasthenia gravis, myotonic dystrophy and facioscapulohumeral muscular dystrophy, often cannot effectively seal the lips around the mouthpiece, especially during forced manoeuvres such as spirometric and maximal respiratory pressure measurements [9,10]. In these cases, the conventional equipment with a tube or flanged type of mouthpiece is not adequate to evaluate respiratory muscle function. Therefore, a face mask adjusted to a portable spirometer and manometer was used to minimise air leakage in neuromuscular patients.The objective of this study was two-fold. First, possible differences in measurements between the original devices with the conventional mouthpiece and the face mask-adjusted devices were studied in healthy subjects. Secondly, a study to render new prediction equations for face mask spirometry and maximal re...

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“…Both smokers and nonsmokers were included in this study. In line with the literature on reference values [4,5,7,8], smoking status was not significant in predicted values of MIP and MEP.…”

Section: Discussionsupporting

confidence: 90%

mentioning

confidence: 99%

Face mask spirometry and respiratory pressures in normal subjects

Wohlgemuth¹,

Kooi²,

Hendriks³

et al. 2003

European Respiratory Journal

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show abstract

“…We believe that the reductions in MRP, found for every two and three decades in both males and females, may be due to the aging process, a fact which is made more evident by the negative correlation verified between age and RMS. The negative correlations found between age and MRP for both sexes were high and corroborate the results found by Neder et al 1 and Vincken, Ghezzo and Cosio 24 , but diverge from those of Bruschi et al 26 and McElvaney et al 27 . Various hypotheses have tried to explain this negative correlation.…”

Section: Discussionsupporting

confidence: 86%

Maximal respiratory pressure in healthy 20 to 89 year-old sedentary individuals of central São Paulo State

Simões¹,

Deus²,

Auad³

et al. 2010

Rev. bras. fisioter.

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“…The American Thoracic Society and the European Respiratory Society 22 reported that the variations between the MIP and MEP values reported by several authors presumably indicates differences among the groups studied and in the way the tests were carried out and measured. Bruschi et al 23 described that in the past twenty years different studies on maximal respiratory pressure were published and they displayed a great variability in the results. These authors reported that the variability could be attributed to the different methodologies used, as well as the kind of mouthpiece, number of maneuvers performed, body position, and differences inherent to the studied populations.…”

Section: Discussionmentioning

confidence: 99%

Pressões respiratórias máximas: valores encontrados e preditos em indivíduos saudáveis

Parreira¹,

França²,

Zampa³

et al. 2007

Rev. bras. fisioter.

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Objective: To compare actual values for maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) found in a sample of healthy individuals from the State of Minas Gerais (Brazil) with the values predicted from the equations put forward by Neder et al. 3 . Method: Using an analog manovacuometer, 100 healthy subjects (54 women and 46 men aged 20-80 years old) were studied. Statistical analysis was performed using parametric or non-parametric tests, depending on the distribution of the variables, and p< 0.05 was considered to be significant. Results: For MIP in women, the mean of the actual values was significantly lower than the mean of the predicted values (68.24 ± 29.48 vs. 86.53 ± 8.76; p= 0.000) and there was a moderate and significant correlation (r= 0.557; p< 0.000). For MIP in men, no significant difference was observed between the actual and predicted values (104.67 ± 42.66 vs. 116.78 ± 14.02; p= 0.055) and there was a low and non-significant correlation (r= 0.236; p= 0.115). For MEP in women, there was no significant difference between the actual and predicted values (80.37 ± 33.32 vs. 85.88 ± 10.90; p= 0.164) and there was a low and non-significant correlation (r= 0.149; p= 0.283). For MEP in men, the mean of the actual values was significantly higher than the mean of the predicted values (142.28 ± 43.89 vs. 126.30 ± 14.19; p= 0.017) and there was a low and non-significant correlation (r= 0.159; p= 0.290). Conclusion: Considering that concordance between actual and predicted values requires the lack of difference and the existence of correlation between them, the equations proposed by Neder et al. 3 were not successful in predicting MIP and MEP values in the population studied.Key words: maximal respiratory pressures; respiratory muscles; predictive equations; lung. resumo Pressões respiratórias máximas: Valores encontrados e Preditos em Indivíduos saudáveisObjetivo: Comparar os valores encontrados de pressões respiratórias máximas (pressão inspiratória máxima-PImáx e pressão expiratória máxima-PEmáx) em uma amostra de indivíduos saudáveis de Minas Gerais com valores preditos pelas equações propostas por Neder et al. 3 . Métodos: Por meio de um manovacuômetro analógico, foram estudados 100 indivíduos saudáveis (54 mulheres, 46 homens), com idade entre 20-80 anos, recrutados no estado de Minas Gerais -Brasil. A análise estatística foi realizada com testes paramétricos ou não-paramétricos, dependendo da distribuição das variáveis, considerando significativo p< 0,05. Resultados: PImáx em mulheres: a média dos valores encontrados foi significativamente menor que a média dos preditos (68,24 ± 29,48 x 86,53 ± 8,76; p= 0,000) e houve correlação de moderada magnitude e significativa (r= 0,557; p< 0,000); PImáx em homens: não houve diferença significativa entre os valores encontrados e preditos (104,67 ± 42,66 x 116,78 ± 14,02; p= 0,055) e houve correlação de baixa magnitude e não significativa (r= 0,236; p= 0,115); PEmáx em mulheres: não houve diferença significativa entre os valores encon...

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Reference Values of Maximal Respiratory Mouth Pressures: A Population-based Study

Cited by 157 publications

References 4 publications

Face mask spirometry and respiratory pressures in normal subjects

Face mask spirometry and respiratory pressures in normal subjects

Maximal respiratory pressure in healthy 20 to 89 year-old sedentary individuals of central São Paulo State

Pressões respiratórias máximas: valores encontrados e preditos em indivíduos saudáveis

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