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 Pulmonoljournal_title
Pediatric pulmonologyauthors
Marcelino AA,Fregonezi GA,Lira MGA,de Oliveira LM,Araújo PRS,Parreira VF,de Andrade AD,Resqueti Vdoi
10.1002/ppul.24591subject
Has Abstractpub_date
2020-02-01 00:00:00pages
496-502issue
2eissn
8755-6863issn
1099-0496journal_volume
55pub_type
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pub_type: 临床试验,杂志文章,随机对照试验
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