Reference values of sniff nasal inspiratory pressure in healthy children.

Abstract:

OBJECTIVE:To determine reference values of sniff nasal inspiratory pressure (SNIP) in healthy children. METHODS:This cross-sectional observational study included healthy children aged 6 to 11 years of both sexes. The volunteers underwent a pulmonary function test to rule out respiratory disorders. Respiratory muscle strength was measured using maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP), respectively, with MIP close to functional residual capacity (FRC) and residual volume, while MEP to total lung capacity. SNIP was performed through the nostril contralateral to the occlusion, close to FRC. Two 6-minute walk tests were performed to assess functional exercise capacity. RESULTS:The sample comprised 121 healthy children (62 girls); 54% presented body mass index (BMI) percentile less than 85th and 46% more than equal to 85th percentile, higher than expected. SNIP values were similar between sexes (91.1 ± 21.0 cmH2 O in girls and 87.7 ± 19.4 cmH2 O in boys; P = .36) as well as the means of lower limits of normal (56.88 cmH2 O for girls and 56.66 cmH2 O for boys). Girls presented SNIP measurements larger than those of the MIP of FRC (P < .0001), while boys presented similar mean values for both. We found a positive correlation between SNIP and BMI percentile (r = .25, P = .04) in girls, unlike boys, in whom no correlation was observed. CONCLUSIONS:SNIP reference values and mean lower limits of normal were defined for healthy children aged 6 to 11. BMI percentile seems to positively influence the inspiratory muscle strength measured by SNIP in girls only.

journal_name

Pediatr Pulmonol

journal_title

Pediatric pulmonology

authors

Marcelino AA,Fregonezi GA,Lira MGA,de Oliveira LM,Araújo PRS,Parreira VF,de Andrade AD,Resqueti V

doi

10.1002/ppul.24591

subject

Has Abstract

pub_date

2020-02-01 00:00:00

pages

496-502

issue

2

eissn

8755-6863

issn

1099-0496

journal_volume

55

pub_type

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