This study aims to present standard reference for values of maximum respiratory pressures of healthy schoolchildren, according to gender.
This is a cross-sectional study involving healthy children aged 7–10 years. Data of body mass and height were evaluated to calculate body mass index (BMI). In addition, forced expiratory volume in 1 second (FEV 1) and maximal expiratory pressure values were evaluated according to the American Thoracic Society. The maximal inspiratory pressure (MIP) and data of maximal expiratory pressure (MEP) obtained in the study showed normal distribution and curves were built by the Lambda–Mu–Sigma (LMS) method, as well as the values of MIP and MEP percentiles 3, 10, 25, 50, 75, 90, and 97 for each gender.
MIP and MEP data were collected from 399 schoolchildren. All schoolchildren in the sample had adequate FEV 1 and BMI. The study showed an increase in respiratory pressure values with age progression. The MIP and MEP values of girls were of 53.4±11.0 and 61.8±12.5cmH 2O, respectively, and those of boys were 59.9±13.6 and 69.6±15.7cmH 2O, respectively.
Normal curves and percentiles were developed for MIP and MEP values of healthy schoolchildren. The extreme percentiles (3rd and 97th) were determined, and a specific graph was elaborated for each group. These graphs may help clinical follow-up and therapeutic monitoring of different pediatric populations.
Apresentar distribuição normal para os valores das pressões respiratórias máximas de escolares saudáveis, de acordo com o gênero.
Estudo transversal envolvendo crianças saudáveis de 7 a 10 anos. Foram avaliados os dados de massa corporal e estatura, para o cálculo do índice de massa corporal (IMC). Os valores de volume expiratório forçado no primeiro segundo (VEF 1) e pressão expiratória máxima foram avaliados de acordo com a American Thoracic Society. Os dados de pressão inspiratória máxima (PI máx) e pressão expiratória máxima (PE máx) obtidos no estudo deram origem à distribuição normal, cuja construção foi elaborada pelo método the Lambda-Mu-Sigma (LMS), bem como os percentis 3, 10, 25, 50, 75, 90 e 97 de PI máx e PI máx de cada sexo.
Os dados de PI máx e PI máx foram coletados de 399 escolares. Todos os escolares da amostra apresentavam VEF 1 e índice de massa corporal adequados. O estudo mostrou aumento dos valores de pressão respiratória com o avançar da idade. Os valores de PI máx e PI máx das meninas foram de 53,49±11,07 e 61,80±12,51cmH 2O, respectivamente; e os meninos de 59,96±13,66 e 69,68±15,72 cmH 2O, respectivamente.