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ntroduction: The assessment of respiratory muscle strength is important in the
diagnosis and monitoring of the respiratory muscles weakness of respiratory and
neuromuscular diseases. However, there are still no studies that provide predictive
equations and reference values for maximal respiratory pressures for children in our
population. Aim: The purpose of this study was to propose predictive equations for
maximal respiratory pressures in healthy school children. Method: This is an
observational cross-sectional study. 144 healthy children were assessed. They were
students from public and private schools in the city of Natal /RN (63 boys and 81
girls), subdivided in age groups of 7-8 and 9-11 years. The students presented the
BMI, for age and sex, between 5 and 85 percentile. Maximal respiratory pressures
were measured with the digital manometer MVD300 (Globalmed ?). The maximal
inspiratory pressure (MIP) and maximal expiratory pressures (MEP) were measured
from residual volume and total lung capacity, respectively. The data were analyzed
using the SPSS Statistics 15.0 software (Statistical Package for Social Science) by
assigning the significance level of 5%. Descriptive analysis was expressed as mean
and standard deviation. T'Student test was used for unpaired comparison of
averages of the variables. The comparison of measurements obtained with the
predicted values in previous studies was performed using the paired t'Student test.
The Pearson correlation test was used to verify the correlation of MRP's with the
independent variables (age, sex, weight and height). For the equations analysis the
stepwise linear regression was used. Results: By analyzing the data, we observed
that in the age range studied MIP was significantly higher in boys. The MEP did not
differ between boys and girls aged 7 to 8 years, the reverse occurred in the age
between 9 and 11 years. The boys had a significant increase in respiratory muscle
strength with advancing age. Regardless sex and age, MEP was always higher than
the MIP. The reference values found in this study are similar to a sample of Spanish
and Canadian children. The two models proposed in previous studies with children
from other countries were not able to consistently predict the values observed in this
studied population. The variables sex, age and weight correlated with MIP, whereas
the MEP was also correlated with height. However, in the regression models
proposed in this study, only gender and age were kept exerting influence on the
variability of maximal inspiratory and expiratory pressures. Conclusion: This study
provides reference values, lower limits of normality and proposes two models that
allow predicting, through the independent variables, sex and age, the value of
maximal static respiratory pressures in healthy children aged between 7 and 11
years old / I
ntrodu??o: A avalia??o da for?a muscular respirat?ria ? importante no diagn?stico
e acompanhamento de fraqueza muscular em doen?as respirat?rias e
neuromusculares. No entanto, ainda inexistem estudos que disponibilizem equa??es
preditivas e valores de refer?ncia para as press?es respirat?rias m?ximas para
crian?as na popula??o brasileira. Objetivo: O prop?sito desse estudo foi propor
equa??es preditivas para as press?es respirat?rias m?ximas de crian?as brasileiras.
M?todo: Trata-se de um estudo observacional do tipo transversal. Foram avaliadas
144 crian?as saud?veis, estudantes da rede p?blica e privada do munic?pio do
Natal/RN (63 meninos e 81 meninas), subdividas nas faixas et?rias de 7 a 8 e 9 a 11
anos. Os escolares apresentavam o IMC, para a idade e o sexo, entre o percentil 5 e
85. As press?es respirat?rias m?ximas foram mensuradas com o manovacu?metro
digital MVD300 (Globalmed?). As press?es inspirat?rias m?ximas (PIm?x) e as
press?es expirat?rias m?ximas (PEm?x) foram medidas a partir do volume residual e
da capacidade pulmonar total, respectivamente. Os dados foram analisados atrav?s
do software Statistics SPSS 15.0 (Statistical Package for the Social Science)
atribuindo-se o n?vel de signific?ncia de 5%. A an?lise descritiva foi expressa atrav?s
de m?dia e desvio padr?o. Foi utilizado o teste t Student n?o pareado para a
compara??o de m?dias das vari?veis. A compara??o das m?dias obtidas com os
valores preditos em estudos pr?vios foi feita atrav?s do teste t Student pareado. O
teste de correla??o de Pearson foi utilizado para verificar a exist?ncia de correla??o
das PRM com as vari?veis independentes (idade, sexo, peso e altura). Para obter as
equa??es preditivas foi utilizada a an?lise de regress?o linear m?ltipla stepwise.
Resultados: Ao analisar os dados, observou-se que nas faixas et?rias avaliadas a
PIm?x foi significativamente superior nos meninos. A PEm?x n?o diferiu entre meninos
e meninas de 7 a 8 anos, o inverso ocorreu na faixa compreendida entre 9 e 11
anos. Os meninos apresentaram incremento significativo da for?a muscular
respirat?ria com o avan?ar da idade. Independentemente do sexo e da faixa et?ria a
PEm?x foi sempre superior ? PIm?x. Os valores de refer?ncia encontrados neste
estudo s?o similares aos de uma amostra de crian?as espanholas e canadenses, no
entanto subestimaram os valores das medidas encontradas em outra amostra de
crian?as canadenses. As equa??es propostas em dois estudos realizados
anteriormente, com crian?as de outros pa?ses, n?o foram capazes de predizer
consistentemente os valores observados neste estudo. As vari?veis sexo, idade e
peso apresentaram correla??o com a PIm?x, enquanto que a PEm?x tamb?m
apresentou correla??o com a altura. No entanto, nos modelos de regress?o
propostos neste estudo, apenas o sexo e a idade permaneceram exercendo
influ?ncia sobre a variabilidade das press?es inspirat?ria e expirat?ria m?ximas.
Conclus?o: O presente estudo disponibiliza valores de refer?ncia, limites inferiores
de normalidade e prop?e dois modelos de equa??o que permitem predizer, atrav?s
das vari?veis independentes sexo e idade, o valor das press?es respirat?rias
est?ticas m?ximas de crian?as brasileiras com idade entre 7 e 11 anos
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/16704 |
| Date | 20 January 2011 |
| Creators | Borja, Raissa de Oliveira |
| Contributors | CPF:72298863415, http://lattes.cnpq.br/1736384836028397, Ferreira, Gard?nia Maria Holanda, CPF:21268843334, http://lattes.cnpq.br/4934425482168899, Parreira, Ver?nica Franco, CPF:62846060606, http://lattes.cnpq.br/3540796454981012, Mendon?a, Karla Morganna Pereira Pinto de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Fisioterapia, UFRN, BR, Movimento e Sa?de |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/embargoedAccess |
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