PT  - JOURNAL ARTICLE
AU  - Kadja Benício
AU  - Jéssica Danielle Medeiros da Fonsêca
AU  - Fernando Augusto Lavezzo Dias
AU  - Antonio Jose Sarmento
AU  - Andrea Aliverti
AU  - Guilherme Fregonezi
TI  - Multiparametric analysis of the nasal inspiratory pressure test and inspiratory muscle activity: with or without diaphragmatic control?
AID  - 10.1183/13993003.congress-2019.PA756
DP  - 2019 Sep 28
TA  - European Respiratory Journal
PG  - PA756
VI  - 54
IP  - suppl 63
4099  - http://erj.ersjournals.com/content/54/suppl_63/PA756.short
4100  - http://erj.ersjournals.com/content/54/suppl_63/PA756.full
SO  - Eur Respir J2019 Sep 28; 54
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).