To access the full text documents, please follow this link: http://hdl.handle.net/2117/27234

Identification of Obstructive Sleep Apnea patients from tracheal breath sound analysis during wakefulness in polysomnographic studies
Solà Soler, Jordi; Fiz Fernández, José Antonio; Torres Cebrián, Abel; Jané Campos, Raimon
Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial; Universitat Politècnica de Catalunya. BIOSPIN - Biomedical Signal Processing and Interpretation
Obstructive Sleep Apnea (OSA) is currently diagnosed by a full nocturnal polysomnography (PSG), a very expensive and time-consuming method. In previous studies we were able to distinguish patients with OSA through formant frequencies of breath sound during sleep. In this study we aimed at identifying OSA patients from breath sound analysis during wakefulness. The respiratory sound was acquired by a tracheal microphone simultaneously to PSG recordings. We selected several cycles of consecutive inspiration and exhalation episodes in 10 mild-moderate (AHI<;30) and 13 severe (AHI>=30) OSA patients during their wake state before getting asleep. Each episode's formant frequencies were estimated by linear predictive coding. We studied several formant features, as well as their variability, in consecutive inspiration and exhalation episodes. In most subjects formant frequencies were similar during inspiration and exhalation. Formant features in some specific frequency band were significantly different in mild OSA as compared to severe OSA patients, and showed a decreasing correlation with OSA severity. These formant characteristics, in combination with some anthropometric measures, allowed the classification of OSA subjects between mild-moderate and severe groups with sensitivity (specificity) up to 88.9% (84.6%) and accuracy up to 86.4%. In conclusion, the information provided by formant frequencies of tracheal breath sound recorded during wakefulness may allow identifying subjects with severe OSA.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria biomèdica::Electrònica biomèdica
Àrees temàtiques de la UPC::Ciències de la salut::Medicina
Sleep apnea-hypopnea syndrome
SAHS
Sleep disordered breathing
Correlation
Databases
Sensitivity
Sleep apnea
Speech
Synchronization
Anthropometry
Correlation methods
Medical disorders
Medical signal detection
Medical signal processing
Neurophysiology
Pneumodynamics
Sleep
OSA
PSG
Anthropometric measures
Exhalation
Inspiration
Obstructive sleep apnea patient identification
Polysomnography
Tracheal breath sound analysis
Tracheal microphone
Wakefulness
Síndromes d'apnea del son
SAOS
Respiració -- Mesurament
Apnea
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
         

Show full item record

Related documents

Other documents of the same author

Solà Soler, Jordi; Fiz Fernández, José Antonio; Torres Cebrián, Abel; Jané Campos, Raimon
López Picazo, Mirella; Solà Soler, Jordi; Fiz Fernández, José Antonio; Jané Campos, Raimon
Gil de Mesquita, Joana Margarida; Fiz Fernández, José Antonio; Solà Soler, Jordi; Morera Prat, Josep Maria; Jané Campos, Raimon
Solà Soler, Jordi; Fiz Fernández, José Antonio; Morera Prat, Josep Maria; Jané Campos, Raimon
Gil de Mesquita, Joana Margarida; Fiz Fernández, José Antonio; Solà Soler, Jordi; Morera Prat, Josep Maria; Jané Campos, Raimon
 

Coordination

 

Supporters