PURPOSE: The sniff nasal inspiratory pressure (SNIP)are a simple and noninvasive technique use to assesses inspiratory muscles strength. Reference values have been previous established for SNIP in adults but no previous studies have provided reference values for SNIP in adult Brazilian population. The main objective of this study were propose reference values of SNIP for Brazilian population through establishment of relationship between anthropometric measurements, physical activity profile and SNIP and at the same time compare the the values obtained with reference values previously published.
METHODS: Antropometric parameters, physical activity profile, maximal inspiratory pressre and maximal sniff nasal inspiratory pressure were measure follow recomandations of Brazilian Thoracic Association. PImax sustained over one second was measured from functional residual capacity (FRC) in the sitting position with a standard flanged mouthpiece during five manoeuvres. SNIP was measured from FRC in the sitting and supine positions using a catheter through a plug occluding one nostril during 10 maximal sniffs through the contralateral nostril. For each test the largest pressure measured in cm H2O was taken into account. Correlation and multiple linear regression were used to predicted male and female SNIP equations.
RESULTS: We studied 117 subjects (59 amle and 58 female) distributed in different age grouped 20-80 years old. The results showed on significant positive relationship between SNIP and height and negative correlation with age (p< 0.05). In the multiple linear regression analysis only age continued to have an independent predictive role for the two dependent variables that correlated with SNIP. The values of SNIP found in Brazilian population were higher when compared with predict values of previous studies.
CONCLUSION: The results of this study provide reference equations of SNIP for health Brazilian population from 20 to 80 years old.
CLINICAL IMPLICATIONS: Provided reference values for SNIP in adult Brazilian population can help to assess inspiratory muscle strength. These results can be applied in research and clinical situations to evaluate the accurately of inspiratory muscle strength in males and females.
DISCLOSURE: Guilherme de Freitas Fregonezi, No Financial Disclosure Information; No Product/Research Disclosure Information