Quantification of nasal respiratory flow by tracheal sound analysis

2012 ◽  
Vol 57 (SI-1 Track-L) ◽  
Author(s):  
K. A. Sohrabi ◽  
D. Basu ◽  
F. Schudt ◽  
M. Scholtes ◽  
O. Seifert ◽  
...  
Keyword(s):  
Sound Analysis ◽  
Respiratory Flow ◽  
Tracheal Sound

P0088 Compressed tracheal sound analysis as a screening method for obstructive apneas and hypopneas

2007 ◽  
Vol 8 ◽  
pp. S91 ◽  
Author(s):  
S.-L. Himanen ◽  
E. Huupponen ◽  
A. Kulkas ◽  
E. Rauhala
Keyword(s):  
Screening Method ◽  
Sound Analysis ◽  
Tracheal Sound

Computerized acoustical techniques for respiratory flow-sound analysis: a systematic review

2019 ◽  
Vol 53 (5) ◽  
pp. 3501-3574 ◽  
Author(s):  
Priya Devi Muthusamy ◽  
Kenneth Sundaraj ◽  
Nurulfajar Abd Manap
Keyword(s):  
Systematic Review ◽  
Sound Analysis ◽  
Respiratory Flow

scholarly journals Using the Entropy of Tracheal Sounds to Detect Apnea during Sedation in Healthy Nonobese Volunteers

2013 ◽  
Vol 118 (6) ◽  
pp. 1341-1349 ◽  
Author(s):  
Lu Yu ◽  
Chien-Kun Ting ◽  
Bryce E. Hill ◽  
Joseph A. Orr ◽  
Lara M. Brewer ◽  
...  
Keyword(s):  
Flow Rate ◽  
Secondary Analysis ◽  
Acoustic Method ◽  
Central Apnea ◽  
Robust Method ◽  
Normal Breathing ◽  
Respiratory Flow ◽  
Tracheal Sound ◽  
Tracheal Sounds ◽  
Estimate Flow

Abstract Background: Undetected apnea can lead to severe hypoxia, bradycardia, and cardiac arrest. Tracheal sounds entropy has been proved to be a robust method for estimating respiratory flow, thus maybe a more reliable way to detect obstructive and central apnea during sedation. Methods: A secondary analysis of a previous pharmacodynamics study was conducted. Twenty volunteers received propofol and remifentinal until they became unresponsive to the insertion of a bougie into the esophagus. Respiratory flow rate and tracheal sounds were recorded using a pneumotachometer and a microphone. The logarithm of the tracheal sound Shannon entropy (Log-E) was calculated to estimate flow rate. An adaptive Log-E threshold was used to distinguish between the presence of normal breath and apnea. Apnea detected from tracheal sounds was compared to the apnea detected from respiratory flow rate. Results: The volunteers stopped breathing for 15 s or longer (apnea) 322 times during the 12.9-h study. Apnea was correctly detected 310 times from both the tracheal sounds and the respiratory flow. Periods of apnea were not detected by the tracheal sounds 12 times. The absence of tracheal sounds was falsely detected as apnea 89 times. Normal breathing was detected correctly 1,196 times. The acoustic method detected obstructive and central apnea in sedated volunteers with 95% sensitivity and 92% specificity. Conclusions: We found that the entropy of the acoustic signal from a microphone placed over the trachea may reliably provide an early warning of the onset of obstructive and central apnea in volunteers under sedation.

scholarly journals Tracheal sound analysis for detection of sleep disordered breathing

2019 ◽  
Vol 23 (2) ◽  
pp. 80-85 ◽  
Author(s):  
Martin Glos ◽  
AbdelKebir Sabil ◽  
Katharina Sophie Jelavic ◽  
Guillaume Baffet ◽  
Christoph Schöbel ◽  
...  
Keyword(s):  
Sleep Disordered Breathing ◽  
Sound Analysis ◽  
Tracheal Sound ◽  
Disordered Breathing

scholarly journals Tracheal Sound Analysis Using a Deep Neural Network to Detect Sleep Apnea

2019 ◽  
Vol 15 (08) ◽  
pp. 1125-1133 ◽  
Author(s):  
Hiroshi Nakano ◽  
Tomokazu Furukawa ◽  
Takeshi Tanigawa
Keyword(s):  
Neural Network ◽  
Sleep Apnea ◽  
Deep Neural Network ◽  
Sound Analysis ◽  
Tracheal Sound

Compressed tracheal sound analysis in screening of sleep-disordered breathing

2008 ◽  
Vol 119 (9) ◽  
pp. 2037-2043 ◽  
Author(s):  
Esa Rauhala ◽  
Joel Hasan ◽  
Antti Kulkas ◽  
Antti Saastamoinen ◽  
Eero Huupponen ◽  
...  
Keyword(s):  
Sleep Disordered Breathing ◽  
Sound Analysis ◽  
Tracheal Sound ◽  
Disordered Breathing

scholarly journals Validation of a New System of Tracheal Sound Analysis for the Diagnosis of Sleep Apnea-Hypopnea Syndrome

SLEEP ◽  
2004 ◽  
Vol 27 (5) ◽  
pp. 951-957 ◽  
Author(s):  
Hiroshi Nakano ◽  
Makito Hayashi ◽  
Etsuko Ohshima ◽  
Nahoko Nishikata ◽  
Toshimitsu Shinohara
Keyword(s):  
Sleep Apnea ◽  
Sound Analysis ◽  
Tracheal Sound ◽  
Hypopnea Syndrome ◽  
New System
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