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sleep obstructive apnea

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https://www.readbyqxmd.com/read/28227926/a-fast-approximation-method-for-principal-component-analysis-applied-to-ecg-derived-respiration-for-osa-detection
#1
Nadi Sadr, Philip de Chazal, Nadi Sadr, Philip de Chazal, Nadi Sadr, Philip de Chazal
In this paper, we present an approximation method for principal component analysis (PCA) and apply it to estimating the respiration from the overnight ECG signal. The approximation method is computationally fast with low memory requirements. We compare it to a full PCA method which is applied to segments of the ECG. Features were calculated from the two ECG derived respiration signals (EDR) and classifiers trained to detect obstructive sleep apnoea (OSA). The Extreme Learning Machine and Linear Discriminant classifier were used to classify the recordings...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227921/directionally-sensitive-peripheral-nerve-recording-bipolar-nerve-cuff-design
#2
Parisa Sabetian, Milos R Popovic, Paul B Yoo, Parisa Sabetian, Milos R Popovic, Paul B Yoo
Although bipolar nerve cuff electrodes (NCEs) are used in clinical neurostimulation therapies (e.g., epilepsy, obstructive sleep apnea), the use of this electrode as part of a closed-up controlled system is very limited. The literature points to high noise content (i.e., poor signal-to-noise ratio, SNR) as the primary reason for not using bipolar NCEs to record neural activity. In fact, over the past several decades, the pseudo-tripolar NCEs, the symmetric configuration of this electrode array (i.e., electrically-shorted side contacts) makes it very difficult to obtain directional information from the recorded neural activity (efferent vs...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227614/portable-prescreening-system-for-sleep-apnea
#3
Martin Kjaer Guul, Poul Jennum, Helge B D Sorensen, Martin Kjaer Guul, Poul Jennum, Helge B D Sorensen, Martin Kjaer Guul, Helge B D Sorensen, Poul Jennum
Obstructive sleep apnea (OSA) occurs in more than 4 % of the adult population. Diagnoses for OSA in sleep clinics are costly and more than half of those submitted to a sleep clinic do not have OSA. A simple, easy, and portable homebased monitoring system to evaluate who are in high-or low risk of suffering from OSA would be beneficial. The system must be able to identify individuals with a high pre-test reliability regarding OSA with the aim of referral and further investigation. We aimed to develop a portable, smartphone, and homebased monitoring system to classify whether a patient screened for sleep apnea is at high risk or low risk of having OSA...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227462/auto-adjusting-mandibular-repositioning-device-for-in-home-use
#4
R Brugarolas, J M Valero-Sarmiento, A Bozkurt, G K Essick, R Brugarolas, J M Valero-Sarmiento, A Bozkurt, G K Essick, J M Valero-Sarmiento, G K Essick, R Brugarolas, A Bozkurt
Obstructive Sleep Apnea (OSA) is a form of respiratory dysfunction that affects 20% of adults in the world. Among the first-line treatments that are used to mitigate the effects of OSA are continuous positive airway pressure (CPAP) and mandibular repositioning devices (MRD). Although CPAP provides a more efficacious therapy than MRDs, recent studies suggest that both are comparable in overall effectiveness due to greater patient preference and adherence to MRD therapy. In this paper, we present the Auto-Positioner, a novel add-on for MRDs that adjusts the extent to which the mandible (lower jaw) is advanced in response to respiratory signals indicating labored breathing during sleep, and to changes in sleeping position known to affect individual patient's airway patency...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227461/dynamic-modeling-of-apnea-induced-concurrent-variations-in-arterial-blood-pressure-and-cerebral-blood-flow-velocity
#5
Raichel Alex, Rong Zhang, Donald E Watenpaugh, Khosrow Behbehani, Raichel Alex, Rong Zhang, Donald E Watenpaugh, Khosrow Behbehani, Raichel Alex, Rong Zhang, Khosrow Behbehani, Donald E Watenpaugh
Obstructive Sleep Apnea (OSA) is characterized by partial (hypopnea) or complete cessation (apnea) of airflow to the lungs during sleep. It has been previously reported that apnea episodes lead to significant rise in instantaneous blood pressure concomitant with a rise in cerebral blood flow velocity, indicating loss of cerebral autoregulation during the episodes. In this study, we have used Auto Regressive Moving Average model (ARMA (na, nb, nk)) to quantify OSA induced dynamic changes in cerebral blood flow velocity (CBFV) with beat to beat blood pressure (BP) as an input...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227458/study-of-phase-estimation-methods-to-analyse-cardiorespiratory-synchronization-in-osa-patients
#6
Jordi Sola-Soler, Beatriz F Giraldo, Jose A Fiz, Raimon Jane, Jordi Sola-Soler, Beatriz F Giraldo, Jose A Fiz, Raimon Jane, Beatriz F Giraldo, Raimon Jane, Jose A Fiz, Jordi Sola-Soler
Obstructive Sleep Apnea (OSA) is a sleep disorder highly prevalent in the general population. Cardiorespiratory Phase Synchronization (CRPS) is a form of non-linear interaction between respiratory and cardiovascular systems that was found to be reduced in severe OSA patients. The Hilbert Transform (HT) method was the recommended choice for estimating the respiratory phase in CRPS studies. But we have noticed that HT provides a phase that is aligned to the transition between the exhalation and the inhalation parts of different breathing cycles, instead of being aligned to the breathing onsets...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227202/snoring-sound-classification-from-respiratory-signal
#7
Mehrnaz Shokrollahi, Shumit Saha, Peyman Hadi, Frank Rudzicz, Azadeh Yadollahi, Mehrnaz Shokrollahi, Shumit Saha, Peyman Hadi, Frank Rudzicz, Azadeh Yadollahi, Frank Rudzicz, Mehrnaz Shokrollahi, Azadeh Yadollahi, Peyman Hadi, Shumit Saha
Snoring is common in the general population and the irregularity could lead to the presence of Obstructive sleep apnea. Diagnosis of OSA could therefore be made by snoring sound analysis. However, there is still a shortage of robust methods to automatically detect snoring sounds without the need to calibrate for every individual. In this paper, a novel method based on neural network is proposed to classify breathing sound episodes from snoring and non-snoring sound segments. Our snore detection algorithm was applied to the tracheal sounds of nine individuals with different OSA severities...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227201/can-we-discriminate-between-apnea-and-hypopnea-using-audio-signals
#8
M Halevi, E Dafna, A Tarasiuk, Y Zigel, M Halevi, E Dafna, A Tarasiuk, Y Zigel, A Tarasiuk, Y Zigel, M Halevi, E Dafna
Obstructive sleep apnea (OSA) affects up to 14% of the population. OSA is characterized by recurrent apneas and hypopneas during sleep. The apnea-hypopnea index (AHI) is frequently used as a measure of OSA severity. In the current study, we explored the acoustic characteristics of hypopnea in order to distinguish it from apnea. We hypothesize that we can find audio-based features that can discriminate between apnea, hypopnea and normal breathing events. Whole night audio recordings were performed using a non-contact microphone on 44 subjects, simultaneously with the polysomnography study (PSG)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227200/obstructive-sleep-apnea-severity-estimation-fusion-of-speech-based-systems
#9
D Ben Or, E Dafna, A Tarasiuk, Y Zigel, D Ben Or, E Dafna, A Tarasiuk, Y Zigel, A Tarasiuk, Y Zigel, E Dafna
Obstructive sleep apnea (OSA) is a common sleep-related breathing disorder. Previous studies associated OSA with anatomical abnormalities of the upper respiratory tract that may be reflected in the acoustic characteristics of speech. We tested the hypothesis that the speech signal carries essential information that can assist in early assessment of OSA severity by estimating apnea-hypopnea index (AHI). 198 men referred to routine polysomnography (PSG) were recorded shortly prior to sleep onset while reading a one-minute speech protocol...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226995/a-daytime-obstructive-sleep-apnea-severity-assessment-framework
#10
Lauren Samy, Paul M Macey, Majid Sarrafzadeh, Lauren Samy, Paul M Macey, Majid Sarrafzadeh, Majid Sarrafzadeh, Lauren Samy
Obstructive sleep apnea (OSA) is a prevalent sleep disorder characterized by repeated episodes of complete or partial blockage of the upper airway. These episodes can interfere with sound sleep and have fatal health consequences. They can also reduce the flow of oxygen to vital organs, like the brain, and lead to brain damage. In this paper, we leverage the correlation between brain damage and OSA to design a prediction framework that can assess the severity level of the OSA condition, as well as estimate the Apnea-Hypopnea Index (AHI) using only features obtained during wakefulness...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226965/distinguishing-obstructive-from-central-sleep-apneas-and-hypopneas-using-linear-svm-and-acoustic-features
#11
Richard Hummel, T Douglas Bradley, Devin Packer, Hisham Alshaer, Richard Hummel, T Douglas Bradley, Devin Packer, Hisham Alshaer, Devin Packer, T Douglas Bradley, Hisham Alshaer, Richard Hummel
Sleep Apnea (SA) is a very common but underdiagnosed respiratory disorder. SA has 2 main types, obstructive and central sleep apnea (OSA and CSA, respectively). The distinction between the 2 types is important for proper clinical management. Our aim in this study was to deploy acoustic analysis of breath sounds to distinguish central from obstructive events. We recorded breath sounds from 29 patients from which 45 segments with obstructive only and 40 segments with central only respiratory events were isolated...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226878/design-and-preliminary-evaluation-of-a-wearable-device-for-mass-screening-of-sleep-apnea
#12
Rohan S Puri, Athanasios G Athanassiadis, Niharika Gill, Sai Sri Sathya, Geetanjali Rathod, Akshat Wahi, Guy Satat, Maulik Majmudar, Pratik Shah, Rohan S Puri, Athanasios G Athanassiadis, Niharika Gill, Sai Sri Sathya, Geetanjali Rathod, Akshat Wahi, Guy Satat, Maulik Majmudar, Pratik Shah, Athanasios G Athanassiadis, Maulik Majmudar, Geetanjali Rathod, Sai Sri Sathya, Akshat Wahi, Niharika Gill, Pratik Shah, Rohan S Puri, Guy Satat
Between 7-18 million Americans suffer from sleep disordered breathing (SDB), including those who suffer from obstructive sleep apnea (OSA). Despite this high prevalence and burden of OSA, existing diagnostic techniques remain impractical for widespread screening. In this study, we introduce a new model for OSA screening and describe an at-home wearable sleep mask (named ARAM) that can robustly track the wearers' sleep patterns. This monitoring is achieved using select sensors that enable screening and monitoring in a form-factor that can be easily self-instrumented...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225580/real-time-multislice-mri-during-continuous-positive-airway-pressure-reveals-upper-airway-response-to-pressure-change
#13
Weiyi Chen, Emily Gillett, Michael C K Khoo, Sally L Davidson Ward, Krishna S Nayak
PURPOSE: To determine if a real-time magnetic resonance imaging (RT-MRI) method during continuous positive airway pressure (CPAP) can be used to measure neuromuscular reflex and/or passive collapsibility of the upper airway in individual obstructive sleep apnea (OSA) subjects. MATERIALS AND METHODS: We conducted experiments on four adolescents with OSA and three healthy controls, during natural sleep and during wakefulness. Data were acquired on a clinical 3T scanner using simultaneous multislice (SMS) RT-MRI during CPAP...
February 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28224726/a%C3%A4-rway-and-sleep-d%C3%A4-sorders-%C3%A4-n-pat%C3%A4-ents-w%C3%A4-th-acromegaly
#14
Onur Turan, Barış Akıncı, Ahmet Omer Ikız, Oya Itıl, Ibrahim Oztura, Emel Ada, Bahri Akdenız, Serkan Yener, Murat Kaya, Arzu Gedık, Abdurrahman Comlekcı
INTRODUCTION-OBJECTIVE: Acromegaly is a multisystemic disorder caused by excessive secretion of growth hormone (GH). Sleep-disordered breathing (SDB) such as sleep apnea syndrome (SAS) may occur in acromegaly. The aim of study was to assess the presence of sleep disorders and evaluate the systemic complications on respiratory, cardiovascular and upper airway systems in acromegalic patients. METHODS: The study group consisted of 30 acromegaly outpatients. GH and insulin-like growth factor 1 (IGF-1) measurements were obtained; body pletysmography, arterial blood gas analysis,tissue-doppler imaging,echocardiography,polysomnography,otorhinolaryngologic examination and head-neck computed tomography were performed...
February 22, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28224648/impacts-of-disease-severity-on-postoperative-complications-in-children-with-sleep-disordered-breathing
#15
Kun-Tai Kang, I-Sheng Chang, Chia-Chen Tseng, Wen-Chin Weng, Tzu-Yu Hsiao, Pei-Lin Lee, Wei-Chung Hsu
OBJECTIVES/HYPOTHESIS: To investigate the effects of diseases severity on postoperative complications following adenotonsillectomy (T&A) in children with sleep-disordered breathing (SDB). STUDY DESIGN: Retrospective study. METHODS: Children aged <18 years were enrolled and underwent T&A for treating SDB. Polysomnography was used to classify the disease severity: primary snoring (apnea-hypopnea index [AHI] <1), mild (AHI = 1-5), moderate (AHI = 5-10), and severe obstructive sleep apnea [OSA] (AHI ≥10)...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28224280/predictors-of-success-in-combination-of-tongue-base-resection-and-lateral-pharyngoplasty-for-obstructive-sleep-apnea
#16
Chi Sang Hwang, Jin Won Kim, Sang Chul Park, Hyo Jin Chung, Chang-Hoon Kim, Joo-Heon Yoon, Hyung-Ju Cho
The base of the tongue has been recognized as a significant site of obstruction in patients with obstructive sleep apnea (OSA). Our aim was to determine the independent predictors of surgical success in tongue base resection combined with lateral pharyngoplasty for OSA. Thirty-one OSA patients who underwent endoscopie-guided coblator or transoral robotic tongue base resection in combination with lateral pharyngoplasty for the treatment of retroglossal obstruction between March 2012 and December 2015 were enrolled in this study...
February 21, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28224078/complications-of-anesthesia-during-electroconvulsive-therapy-due-to-undiagnosed-obstructive-sleep-apnea-a-case-study
#17
Georgia Trakada, Lemonia Velentza, Angeliki Konsta, Athanasia Pataka, Paul Zarogoulidis, Dimitris Dikeos
This is a case description of two patients with bipolar affective disorder, who presented complications, possibly due to underlying, undiagnosed obstructive sleep apnea syndrome (OSAS), during anesthesia for electroconvulsive therapy (ECT). The first patient, just after receiving the second ECT, developed tachypnea with spasm of the upper airways and severe oxygen desaturation He was intubated and transferred to the medical intensive care unit where he was extubated 15 h later. The second patient, just after the eighth ECT, developed tachycardia and severe hypertension...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28222012/effects-of-the-nasal-passage-on-forced-oscillation-lung-function-measurements
#18
Chuong Ngo, Karl Krüger, Thomas Vollmer, Stefan Winter, Bernhard Penzlin, Sylvia Lehmann, Steffen Leonhardt, Berno Misgeld
The forced oscillation technique (FOT) is a non-invasive pulmonary function test which is based on the measurement of respiratory impedance. Recently, promising results were obtained by the application of FOT on patients with respiratory failure and obstructive sleep apnea (OSA). By using a nasal mask instead of a mouthpiece, the influences of the nasal passage and upper shunt alter the measured mechanical impedance. In this paper, we investigated the effects of the nasal passage and mask on FOT measurements from eight healthy subjects...
February 21, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28220556/association-between-central-sleep-apnea-and-left-ventricular-structure-the-multi-ethnic-study-of-atherosclerosis
#19
Sogol Javaheri, Ravi K Sharma, David A Bluemke, Susan Redline
We assessed whether the presence of central sleep apnea is associated with adverse left ventricular structural changes. We analysed 1412 participants from the Multi-Ethnic Study of Atherosclerosis who underwent both overnight polysomnography and cardiac magnetic resonance imaging. Subjects had been recruited 10 years earlier when free of cardiovascular disease. Our main exposure is the presence of central sleep apnea as defined by central apnea-hypopnea index = 5 or the presence of Cheyne-Stokes breathing...
February 21, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28220307/drug-induced-sedation-endoscopy-in-children-2%C3%A2-years-with-obstructive-sleep-apnea-syndrome-upper-airway-findings-and-treatment-outcomes
#20
A Boudewyns, P Van de Heyning, S Verhulst
Few data are available about the pattern of upper airway (UA) obstruction in children <2 years with obstructive sleep apnea syndrome (OSAS). Also, the role of adenoidectomy versus adenotonsillectomy (AT) is poorly defined in this age group. We performed drug-induced sedation endoscopy (DISE) in young OSAS children to investigate the pattern of UA obstruction and the value of DISE in therapeutic decision making. Retrospective analysis of ≤2-year-old children undergoing DISE-directed UA surgery. OSAS severity and the treatment outcomes were documented by polysomnography...
February 20, 2017: European Archives of Oto-rhino-laryngology
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