RT Journal Article
SR Electronic
T1 Multiparametric analysis of the nasal inspiratory pressure test and inspiratory muscle activity: with or without diaphragmatic control?
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP PA756
DO 10.1183/13993003.congress-2019.PA756
VO 54
IS suppl 63
A1 Kadja Benício
A1 Jéssica Danielle Medeiros da Fonsêca
A1 Fernando Augusto Lavezzo Dias
A1 Antonio Jose Sarmento
A1 Andrea Aliverti
A1 Guilherme Fregonezi
YR 2019
UL http://erj.ersjournals.com/content/54/suppl_63/PA756.abstract
AB We investigated the influence of the diaphragmatic activation control (diaphC) on the contractile properties and relaxation rates of the inspiratory muscles of healthy subjects, as well as the electrical activity of these muscles, evaluated noninvasively through the sniff nasal inspiratory test (SNIP) and surface electromyography (sEMG), respectively. Ten sniff maneuvers were carried out during two different days: with and without instructions on diaphC. Twenty-two healthy adults (10 men and 12 women), aged (23.7 ± 2.2), BMI (22.8 ± 1.9), FVC% (96.8 ± 9.1) and FEV1% (92.9 ± 9.6) were studied. The peak pressure during SNIP, maximal relaxation rate, maximal rate of pressure development, contraction time and total maneuver time, as well as the electrical activity of the inspiratory muscles, were significantly higher in the maneuvers with diaphC when compared with those without diaphC (see table). The diaphC performed during the SNIP test influences the inspiratory pressure obtained and the contractile properties of the respiratory muscles due to changes in the pattern of muscle recruitment from the original test described and, therefore, its characteristics. Thus, for better performance of the SNIP test, instruction of diaphC should be encouraged.FootnotesCite this article as: European Respiratory Journal 2019; 54: Suppl. 63, PA756.This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only).