RESUMO
Maximal respiratory pressures are suitable for non -invasive evaluation of respiratory muscle function A variety of methods for subject selection and test procedures have been used for the determination of normal values and reference equations for maximal respiratory pressure [MRP]. we analyzed a well-defined, healthy subgroup of 224 men and 211 women with a wide age range [20 to 82 yr], using multiple linear regression, for the purpose of determining the effect of age, other correlates, normal values, and gender-specific reference equations on MRP. Mean values of maximal inspiratory pressure [MIP] were 9.78 kPa for men and 7.61 kPa for women. Mean values of maximal expiratory pressure [MEP] were 13.11kPa for men and 10.21 kPa for women. Prediction equations and mean value normally resulted from a cohort study of healthy 20-82 yrs subjects are given and are recommended to be used by pulmonary function laboratories in IRAN