RT Journal Article
SR Electronic
T1 Estimation of Respiratory Signals using Tracheal Sound and Movement
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP OA3278
DO 10.1183/13993003.congress-2019.OA3278
VO 54
IS suppl 63
A1 Nasim Montazeri Ghahjaverestan
A1 Muammar Kabir
A1 Kaiyin Zhu
A1 Shumit Saha
A1 Bojan Gavrilovic
A1 Babak Taati
A1 Hisham Alshaer
A1 Azadeh Yadollahi
YR 2019
UL http://erj.ersjournals.com/content/54/suppl_63/OA3278.abstract
AB Introduction: Sleep apnea (SA) is clinically assessed using respiratory signals: thoracoabdominal (TA) movements and airflow, recorded during overnight polysomnography (PSG). A simpler portable device with the ability of estimating respiratory signals is more convenient and cost-effective. Tracheal sound and movements can be conveniently recorded with simple instruments.Objectives: To estimate respiratory signals using tracheal sounds and movements.Methods: Participants >18 yrs with suspected sleep apnea underwent overnight PSG. Simultaneously, tracheal sound and movements were recorded using an embedded microphone and accelerator placed over the tracheal notch. Linear regression was used to estimate TA movements from sound energy and the range of movements. Also, the sound energy envelope was extracted as a surrogate of airflow level. Repeated measure correlation was used to calculate the agreement between reference and estimated signals in normal breathing, apneas and hypopneas.Results: Forty participants (21 females, age: 49 ± 16, BMI: 29.5 ± 6.1, and AHI: 17.9 ± 19.6) were included. Estimated movements correlated significantly with TA movements during normal breathing (0.53±0.06*), hypopneas (0.65±0.07*) and apneas (0.71±0.05*). Airflow correlated with PSG-airflow during normal breathing (0.29±0.08*), hypopneas (0.47±0.07*) and apneas (0.63±0.09*). (*P<0.001)Conclusion: Tracheal sounds and movements are promising tools for SA assessment.FootnotesCite this article as: European Respiratory Journal 2019; 54: Suppl. 63, OA3278.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).