Effects of diaphragmatic control on the assessment of sniff nasal inspiratory pressure and maximum relaxation rate
Braz. j. phys. ther. (Impr.)
;
20(1): 96-103, Jan.-Feb. 2016. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-778386
ABSTRACT
OBJECTIVE:
To assess the influence of diaphragmatic activation control (diaphC) on Sniff Nasal-Inspiratory Pressure (SNIP) and Maximum Relaxation Rate of inspiratory muscles (MRR) in healthy subjects.METHOD:
Twenty subjects (9 male; age 23 (SD=2.9) years; BMI 23.8 (SD=3) kg/m2; FEV1/FVC 0.9 (SD=0.1)] performed 5 sniff maneuvers in two different moments with or without instruction on diaphC. Before the first maneuver, a brief explanation was given to the subjects on how to perform the sniff test. For sniff test with diaphC, subjects were instructed to perform intense diaphragm activation. The best SNIP and MRR values were used for analysis. MRR was calculated as the ratio of first derivative of pressure over time (dP/dtmax) and were normalized by dividing it by peak pressure (SNIP) from the same maneuver.RESULTS:
SNIP values were significantly different in maneuvers with and without diaphC [without diaphC -100 (SD=27.1) cmH2O/ with diaphC -72.8 (SD=22.3) cmH2O; p<0.0001], normalized MRR values were not statistically different [without diaphC -9.7 (SD=2.6); with diaphC -8.9 (SD=1.5); p=0.19]. Without diaphC, 40% of the sample did not reach the appropriate sniff criteria found in the literature.CONCLUSION:
Diaphragmatic control performed during SNIP test influences obtained inspiratory pressure, being lower when diaphC is performed. However, there was no influence on normalized MRR.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Músculos Respiratórios
/
Diafragma
/
Inalação
/
Capacidade Inspiratória
Limite:
Humanos
Idioma:
Inglês
Revista:
Braz. j. phys. ther. (Impr.)
Assunto da revista:
MEDICINA FISICA E REABILITACAO
Ano de publicação:
2016
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Federal do Rio Grande do Norte/BR
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