Dissertations / Theses on the topic 'Sleep apnoea syndromes'
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Revol, Bruno. "Pharmacoépidémiologie des apnées du sommeil Impact of concomitant medications on obstructive sleep apnoea Drugs and obstructive sleep apnoeas Diagnosis and management of central sleep apnea syndrome Baclofen and sleep apnoea syndrome: analysis of VigiBase® the WHO pharmacovigilance database Gabapentinoids and sleep apnea syndrome: a safety signal from the WHO pharmacovigilance database Valproic acid and sleep apnea: a disproportionality signal from the WHO pharmacovigilance database Ticagrelor and Central Sleep Apnea What is the best treatment strategy for obstructive sleep apnoea-related hypertension? Who may benefit from diuretics in OSA? A propensity score-matched observational study." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALV026.
Full textThe clinical evaluation of drugs before approval is based on randomized controlled trials. Although they are considered as the gold standard for testing drugs, their results are necessarily limited to patients included in the trials. Moreover, almost all clinical trials are primarily designed to assess the efficacy of a treatment, so safety is only a secondary concern. Regarding sleep apnea syndrome (SAS), while many drug trials have been conducted, most of the results are weak or even contradictory. In addition to limited trial duration and population size, one explanation is that the sleep apnea population is highly heterogeneous with respect to symptoms and physiological traits linked to disease pathogenesis, giving various patient “phenotypes”. Real-life data are therefore needed to define which drugs could improve SAS or associated comorbidities and who might benefit from them. On the contrary, clinicians need to be aware that some drugs may induce or worsen sleep apnea.Pharmacoepidemiology is now part of any pharmacovigilance survey, as it provides both descriptive and comparative approaches of spontaneous reports. Associations between the exposure to one or more drugs and the occurrence of adverse effects can thus be sought. As for all observational studies, the major difficulty is to control for confounding factors. One of the study designs commonly used, is the case/non-case analysis, which investigates disproportionality between the numbers of adverse drug reactions reported with the drug of interest compared to the number reported with all other drugs. In this way, we showed significant associations between the use of baclofen, gabapentinoids or valproic acid and the reporting of SAS in the WHO drug adverse event database, suggesting a role of the GABAergic system in the pathogenesis of drug-induced central sleep apnea. A disproportionality signal was also found for ticagrelor, based on a different mechanism of action.Pharmacoepidemiological analyses also make it possible to study the benefit of drugs in real-life. Propensity scores are used to minimize selection bias, leading to a comparability between the exposure groups close to that observed in randomized trials. Using these statistical methods, we have investigated the potential value of targeting the renin-angiotensin system for the management of hypertension in obstructive sleep apnea (OSA) patients, especially the use of sartans. For hypertensive apneic patients, our work suggests that diuretics could decrease the severity of OSA, particularly in the overweight or moderately obese. Prospective studies are now needed to confirm these findings, because real-life data cannot be a substitute for controlled clinical trials
Solin, Peter 1964. "Central sleep apnoea in heart failure : recognition and pathogenesis." Monash University, Dept. of Medicine, 2000. http://arrow.monash.edu.au/hdl/1959.1/8972.
Full textShepherd, Kelly. "Gastro-oesophageal reflux in obstructive sleep apnoea : prevalence and mechanisms." University of Western Australia. School of Anatomy and Human Biology, 2009. http://theses.library.uwa.edu.au/adt-WU2009.0085.
Full textLai, Yuen-kwan Agnes, and 賴婉君. "Continuous positive airway pressure education on adherence in adults with obstructive sleep apnoea." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/198849.
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Nursing Studies
Doctoral
Doctor of Nursing
Ahrens, Anika. "A randomized clinical trial of the treatment of obstructive sleep apnoea using oral appliances." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47849599.
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Dentistry
Doctoral
Doctor of Philosophy
Wakwella, Ajith S. "Processing of snore related sounds for the diagnosis of obstructive sleep apnoea (OSA) /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18755.pdf.
Full textHarris, Ricci, and n/a. "Obstructive sleep apnoea syndrome : symptoms and risk factors among Maori and non-Maori adults in Aotearoa." University of Otago. Weelington School of Medicine & Health Sciences, 2003. http://adt.otago.ac.nz./public/adt-NZDU20070507.112047.
Full textJoffe, David. "Obstructive sleep apnoea the genesis of daytime somnolence and cognitive impairment : arousals, hypoxia and circadian rhythm /." Connect to full text, 1997. http://hdl.handle.net/2123/382.
Full textTitle from title screen (viewed Apr. 15, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Dept. of Respiratory Medicine, Royal North Shore Hospital, Faculty of Medicine. Degree awarded 1998; thesis submitted 1997. Includes bibliography. Also available in print form.
Desai, Anup. "Obstructive sleep apnoea and driver performance prevalence, correlates, and implications for driver fatigue /." Connect to full text, 2002. http://hdl.handle.net/2123/589.
Full textIncludes tables and questionnaires. Title from title screen (viewed Apr. 29, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Faculty of Medicine. Degree awarded 2003; thesis submitted 2002. Includes bibliography. Also available in print form.
Baillieul, Sébastien. "Syndrome d'apnées du sommeil et cerveau : une relation bidirectionnelle Continuous positive airway pressure improves gait control in severe obstructive sleep apnoea: A prospective study Hypoxic conditioning and the central nervous system: A new therapeutic opportunity for brain and spinal cord injuries?" Thesis, Université Grenoble Alpes, 2020. https://thares.univ-grenoble-alpes.fr/2020GRALS025.pdf.
Full textThe human brain is a perfect example of our dependence on oxygen. Brain physiological constraints render it vulnerable to hypoxia, such as encountered in environmental conditions (high altitude exposure) or pathological hypoxemic conditions. Among those pathological conditions, and due to its high prevalence in general population and the various levels of hypoxia resulting of the different degrees of severity of the pathology, obstructive sleep apnoea syndrome (OSAS) is a pathophysiological model of choice to investigate the detrimental effects of hypoxia on the brain. The cyclical, repeated episodes of apnoea and hypopnea during sleep that characterize OSAS result in intermittent hypoxia, sleep fragmentation and fluctuations in intrathoracic pressure, which are stressors that triggers mechanisms contributing to the initiation and progression of life-threatening cardiometabolic diseases, as well as several brain repercussions, such as cognitive impairment and stroke. This Thesis work explores the bidirectional relationship between sleep apnoea syndromes (SAS) and the brain. The first axis is focused on the neurocognitive consequences of OSAS through the lens of gait control. The neurocognitive signature of OSAS has been thoroughly investigated but recently, gait impairments have been highlighted in severe OSAS, with dose-response relationship between OSAS severity and the magnitude of gait impairments. As gait control relies at least partly on frontal lobe functions, it has been suggested that gait could represent a marker of OSAS brain repercussions. We investigated the effects of continuous positive airway pressure (CPAP) treatment on gait control, with contrasting results. In a first prospective controlled study, eight weeks of CPAP improved gait control in severe OSAS patients (Baillieul et al., 2018, Plos One). In order to validate those results and investigate the neurophysiological correlates of the link between gait control and OSAS, we conducted a randomized controlled trial which investigated the impact of an 8-week CPAP treatment compared to sham-CPAP on gait control in severe OSAS patients (Baillieul et al., 2020, Submitted). Contrary to our hypothesis, we found no improvement in gait control in the CPAP group and this result is substantiated by the absence of impact of CPAP on the determinants of gait control, further illustrating the complexity of the OSAS-neurocognitive relationship. The second axis is focused on the cerebrovascular repercussions of SAS. SAS and stroke are both severe intertwined conditions, SAS being both cause and potentially consequence of stroke. The present work is focused on the identification of phenotypic traits of SAS in post-stroke patients, to improve diagnosis of SAS following stroke (Baillieul et al., in preparation). Screening stroke patients for SAS is crucial due to the high risk of morbimortality and functional consequences associated to SAS following stroke but cannot be achieved without a more accurate identification of patients at risk to develop SAS following stroke. The third axis has been conceived as a perspective that will serve the development of the second axis. In this last axis, the potential of brain imagery and in particular magnetic resonance imagery to develop markers of stroke recovery as well as investigate the pathophysiological mechanisms underlying stroke-related deficiencies are presented, with a specific focus on gait and walking activity. The neural correlates of walking activity following stroke are highlighted, using a voxel-based lesion-symptom mapping approach (Baillieul et al., 2019, Hum. Mov. Sci.). Imagery markers of walking recovery following stroke using diffusion tensor imaging are also presented (Soulard et al. 2019, Neurology). This work on brain imagery markers of stroke recovery will further serve the development of investigations focused on the neural correlates of SAS following stroke
Lam, Chung-mei Jamie. "Obstructive sleep apnea and cardiometabolic complications." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43085854.
Full textLebret, Marius. "Etude des déterminants des fuites non-intentionnelles au cours du traitement des troubles respiratoires du sommeil par pression positive et développement de stratégies innovantes pour le choix des masques et la gestion des fuites Factors contributing to unintentional leak during CPAP treatment : a systematic review Determinants of unintentional leak during CPAP treatment in obstructive sleep apnea syndrome Nasal Obstruction Symptom Evaluation Score to Guide Mask Selection in CPAP-Treated Obstructive Sleep Apnea N and Borel J-C. Comparison of auto-and fixed -continuous positive airway pressure on -air-leak in patients with obstructive sleep apnoea : data from a randomized controlled trial Adherence to CPAP with a nasal mask combined with mandibular advancement device versus an oronasal mask: a randomized crossover trial Nasal obstruction and male gender contribute to the persistence of mouth opening during sleep in CPAP-treated obstructive sleep apnoea." Thesis, Université Grenoble Alpes (ComUE), 2019. http://www.theses.fr/2019GREAS025.
Full textContinuous Positive Airway Pressure (CPAP) is the first-line treatment for moderate to severe Obstructive Sleep Apnea (OSA) syndrome. Unintentional leakage and its annoying consequences are the most frequently reported adverse effects. However, the causes of unintentional leaks are poorly understood. This thesis aimed at identifying the determining factors of unintentional leaks during CPAP treatment in OSA and developping innovative strategies for the selection of masks and leaks management.In our systematic review we have arbitrarily split the potential determining factors of leaks into two categories: 1) the non evolving factors overnight: nasal obstruction, age, high body mass index, central fat distribution and male sex were potential contributing factors associated with unintentional leakage. The oronasal mask was associated with higher unintentional leaks than the nasal mask; and 2) the evolving factors overnight such as sleep stages, body position, mouth opening and CPAP level. We studied these evolving factors in 74 OSA patients treated with auto-adjusting CPAP: mouth opening, CPAP level, body position and REM sleep were independently associated with an increased risk of unintentional leakage. We also highlighted that oronasal masks reduced the risk of unintentional leaks in cases of mouth opening and REM sleep. Since the CPAP level is a determining factor of leakage we evaluated through an ancillary analysis of a randomised controlled trial whether the type of CPAP (fixed versus auto-adjusting) could contribute to leakage. In this study, there was no effect of type of CPAP on leaks or the type of interface used after 4 month of treatment. Finally, in 214 patients, we prospectively evaluated the relevance of the Nasal Obstruction Syndrom Evaluation (NOSE) score as a simple decision-making tool to guide the choice of mask during CPAP initiation. A NOSE score > 50/100 at the initiation was independently associated with the use of an oronasal mask at 4 month. This score could be a simple tool for the objective assessment of nasal obstruction related to symptoms, facilitating the choice of an appropriate interface. As a conclusion, during this thesis we have developed a novel methodology to characterise and analyse the overnight determinants of unintentional leakage. Its clinical application could lead to individualised corrective measures of leaks. Further studies are needed to prospectively validate this model, as well as the clinical relevance of the NOSE score to guide the choice of mask in daily practice
Attali, Valérie. "Stabilité des voies aériennes supérieures et intégration centrale." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066450.
Full textThe obstructive sleep apnoea syndrome (OSAS) involves recurrent sleep-related upper airways (UA) collapse. UA mechanical properties and neural control are altered imposing a mechanical load on inspiration. UA collapse does not occur during wakefulness, hence arousal-dependent compensation. Three studies in healthy and apnoeic patients allowed characterizing it. From upper-airway pressure-flow relationships, the first study described local compensation mechanisms, before and after a neurovegetative modulation based on ptérygopalatin node compression. The second study showed a respiratory-related cortical activity that could contribute to the increased neural drive to upper airway and to inspiratory muscles that has previously been described in OSAS, and could therefore contribute to the arousal-dependent compensation of upper airway abnormalities. The third study showed a sensory gating-out process of breathing sensations in OSAS that could be reversed by mandibular advancement device, allowing linking upper-airway stability improvement to central integration of respiratory sensations. Finally, upper-airway pressure-flow relationship was approached by two models
Riha, Renata Ludmilla. "Genetics of the sleep apnoea/hypopnoea syndrome." Thesis, University of Edinburgh, 2004. http://hdl.handle.net/1842/25122.
Full textLam, Chung-mei Jamie, and 林頌眉. "Obstructive sleep apnea and cardiometabolic complications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43085854.
Full textLam, Yau-min, and 林宥冕. "Obstructive sleep apnea in children with Down syndrome: a systematic review." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48423786.
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Public Health
Master
Master of Public Health
Donoghue, Simon. "The cardiovascular consequences of obstructive sleep apnoea hypopnoea syndrome." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269700.
Full textMoss, James. "Physiological effects of treatments in obstructive sleep apnoea syndrome." Thesis, Sheffield Hallam University, 2013. http://shura.shu.ac.uk/20763/.
Full textUlander, Martin. "Psychometric aspects of obstructive sleep apnea syndrome." Doctoral thesis, Linköpings universitet, Avdelningen för neurovetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97475.
Full textCloonan, Yona Keich. "Sleep outcomes in children with craniofacial microsomia /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/10877.
Full textWong, Keith K. H. "Measuring sleep and neurobiological functional parameters in patients with obstructive sleep apnea." Connect to full text, 2007. http://hdl.handle.net/2123/2245.
Full textTitle from title screen (viewed Mar. 12, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Discipline of Medicine, Faculty of Medicine. Degree awarded 2008; thesis submitted 2007. Includes bibliography. Also issued in print.
Gagnon, Victoria Lee. "Obstructive sleep apnea syndrome and associated health risks /." Abstract Full Text (HTML) Full Text (PDF), 2008. http://eprints.ccsu.edu/archive/00000538/02/1986FT.htm.
Full textThesis advisor: Ruth Rollin. "... in partial fulfillment of the requirements for the degree of Master of Science in Biology." Includes bibliographical references (leaves 39-41). Also available via the World Wide Web.
Mathur, Rajat. "Family studies in patients with the sleep apnoea/hypopnoea syndrome." Thesis, University of Edinburgh, 1995. http://hdl.handle.net/1842/19996.
Full textFaccenda, Jacqueline Frances. "Systemic blood pressure in the obstructive sleep apnoea/hypopnoea syndrome." Thesis, University of Edinburgh, 2002. http://hdl.handle.net/1842/23341.
Full textAl-Abri, Mohammed A. "Studies in blood pressure and obstructive sleep apnoea/hypopnoea syndrome." Thesis, University of Edinburgh, 2007. http://hdl.handle.net/1842/24009.
Full textKingshott, Ruth N. "Factors affecting daytime function in the sleep apnoea/hypopnoea syndrome." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/28365.
Full textGhiassi, Ramesh. "The development of pictorial tools for obstructive sleep apnoea syndrome." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24435.
Full textWåhlin, Larsson Britta. "Skeletal muscle in Restless legs syndrome (RLS) and Obstructive sleep apnoea syndrome (OSAS) /." Örebro : Örebro University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-6245.
Full textWåhlin, Larsson Britta. "Skeletal muscle in Restless legs syndrome (RLS) and Obstructive sleep apnoea syndrome (OSAS)." Doctoral thesis, Örebro universitet, Hälsoakademin, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-6245.
Full textPatel, Mayur Mahendra. "A comparison of the edentulous and dentate prosthodontic patient for the occurrence of obstructive sleep apnea." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3321.
Full textTitle from document title page. Document formatted into pages; contains vii, 47 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 30-31).
Hill, Elizabeth Anne. "Prevalence and treatment of obstructive sleep apnoea/hypopnoea syndrome in adults with Down syndrome." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/22917.
Full textSam, Kim. "Short term effects of an oral appliance in the treatment of mild to moderate Obstructive Sleep Apnea in Chinese subjects." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21879278.
Full textCheng, Hai-kiu Kelvin. "Evaluation on the quality of life for patients with obstructive sleep apnea using the continuous positive airway pressure device treatment." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B4072041X.
Full textIliescu, Eduard Andrei. "Prevalence of proteinuria in the obstructive sleep apnea syndrome." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/MQ54460.pdf.
Full textChittenden, Thomas William. "Chronic Hypoxia and Cardiovascular Dysfunction in Sleep Apnea Syndrome." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28718.
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Wichmann, Mark William. "A device for the treatment of adult Sleep Apnea Syndrome." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45960.
Full textAn electronically-controlled positive-displacement bellows-type air pump has been developed in the Bio-medical Engineering Laboratory for the treatment of adult Sleep Apnea Syndrome (SAS). An electronically-controlled positive-displacement pump has been employed in order to eliminate the pressure regulator and accompanying noise of present therapeutic devices. The positive-displacement pump is found to quietly and effectively provide the required airway pressures for the treatment of adult Sleep Apnea Syndrome. New developments in the reduction of the size and noise levels of current therapeutic devices, however, preclude mass production of the bellows-type pump because of its size disadvantage. The custom nasal mask and exhalation valve, control system, pressure-monitoring alarm system, and the controlled humidifier of the positive-displacement pump should be incorporated within the present fanâ type Nasal Continuous Positive Airway Pressure (NCPAP) system to provide quieter, more comfortable, and safer NCPAP therapy. Before the design and development of the positive displacement NCPAP pump is detailed in this thesis, however, the problem of adult Sleep Apnea Syndrome is introduced, available therapies are investigated, and the current NCPAP therapy system is examined.
Master of Science
Dingwall, Kylie. "Effects of medication on the sleep architecture of patients with obstructive sleep apnea syndrome (OSAS) /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19264.pdf.
Full textMok, Yuk-wan Wendy. "A validation of the Calgary Sleep Apnea quality of life index (Chinese version) and an evaluation of treatment effectiveness and patient perference by physiological and neurobehavioural outcome measures in Chinese sleep apnea patients /." Hong Kong : University of Hong Kong, 2002. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2520564x.
Full textSantos, Telma Cristiana Resse Nunes dos. "Erectile disfunction in obstrutive sleep apnea syndrome - prevalence and determinants." Dissertação, Faculdade de Medicina da Universidade do Porto, 2010. http://hdl.handle.net/10216/61110.
Full textGroenewald, Liechka. "The prevalence of sleep apnea in patients with Cushing's syndrome." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/77081.
Full textDissertation (MSc)--University of Pretoria, 2020.
Physiology
MSc
Restricted
Santos, Telma Cristiana Resse Nunes dos. "Erectile disfunction in obstrutive sleep apnea syndrome - prevalence and determinants." Master's thesis, Faculdade de Medicina da Universidade do Porto, 2010. http://hdl.handle.net/10216/61110.
Full textBreslin, Jennifer H. "Sleep Disturbance, Cognition, and Behavior in Down Syndrome." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/201494.
Full textNg, Kwok-keung Daniel. "Sleep related breathing disorders in children /." View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36223724.
Full textNg, Kwok-keung Daniel, and 吳國強. "Sleep related breathing disorders in children." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B45007688.
Full textNoguchi, Tetsuo. "Heat shock protein 72 level decreases during sleep in patients with obstructive sleep apnea syndrome." Kyoto University, 1997. http://hdl.handle.net/2433/202175.
Full textXu, Chun Wootton David Macmullen. "Computational mechanics models for studying the pathogenesis of obstructive sleep apnea (OSA) /." Philadelphia, Pa. : Drexel University, 2006. http://dspace.library.drexel.edu/handle/1860/746.
Full textPérez, Trenard Diego Oswaldo. "Optimal control of non-invasive neuromodulation for the treatment of sleep apnea syndromes." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S014/document.
Full textSleep apnea syndrome (SAS) is a multifactorial disease characterized by recurrent episodes of breathing pauses or significant reductions in respiratory amplitude during sleep. These episodes may provoke acute cardiorespiratory responses along with alterations of the sleep structure, which may be deleterious in the long term. Several therapies have been proposed for the treatment of SAS, being continuous positive airway pressure the gold standard treatment. Despite its excellent results in symptomatic patients, there is a 15% initial refusal rate and long term adherence is difficult to achieve in minimally symptomatic patients. Therefore, the development of non-invasive SAS treatment methods, with improved acceptability, is of major importance. The objective of this PhD thesis is to propose new signal processing and control methods of non-invasive neuromodulation for the treatment of SAS. The hypothesis underlying this work is that bursts of kinesthetic stimulation delivered during the early phase of apneas or hypopneas may elicit a controlled startle response that can activate sub-cortical centers controlling upper airways muscles and the autonomic nervous system, stopping respiratory events without generating a cortical arousal. In this context, the first part of this manuscript is dedicated to the description of a novel real-time monitoring and therapeutic neuromodulation system, which functions as a multi-purpose device for SAS diagnosis and treatment through kinesthetic stimulation. This system has been developed in the framework of an ANR TecSan project led by our laboratory, with the participation of Sorin CRM SAS. The main contributions in this thesis are focused on the signal processing and control aspects of this system, as well as the electronics associated. Another contribution is related to the evaluation of these methods and devices through specific clinical protocols. In a second part, we propose a first optimal On/Off control method for delivering kinesthetic stimulation, using as control variable the output of a real-time respiratory event detector. A unique stimulation strategy where a constant stimulation amplitude is applied upon event detention was implemented in a first clinical protocol, dedicated to assessing the patient response to therapy. Results showed that 75% of the patients responded correctly to therapy, showing statistically significant reductions in respiratory event durations. Also, significant decreases in the SaO2 variability were also found when implementing a novel acute analysis method. Since we hypothesized that inappropriate patient selection could explain the observed lack of response in 25% of patients, we proposed a method to differentiate patients who could benefit from this therapy based on the estimation of complexity-based indexes of heart rate variability. Results of these analyses showed that the effectiveness of this therapy seems correlated to a functional autonomic nervous system. Finally, an improved closed-loop control method integrating concurrent, coupled proportional-derivative (PD) controllers in order to adaptively change the kinesthetic stimulation was proposed. It uses as control variables three physiological signals recorded in real-time: Nasal pressure, oxygen saturation and the electrocardiogram signal. A second clinical protocol with the main objective of validating the control algorithm for patient-specific adaptive kinesthetic stimulation was launched. Several improvements to the first version of the system were developed to allow the integration of the proposed controller. Preliminary results from the first phase of this study validated the proposed controller operation and showed that the controller was able to provide adaptive kinesthetic stimulation in function of the patient-specific responses. A second phase of this study implementing the proposed controller and the set of the selected control parameters from the first phase is currently ongoing
Fridel, Keith. "Adherence and Effectiveness of Positional Therapy for Obstructive Sleep Apnea Syndrome." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/203486.
Full textAppelberg, Jonas. "Ventilation and Lung Volume During Sleep and in Obstructive Sleep Apnea." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3363.
Full textDingli, Kyra [Verfasser]. "Obstructive sleep apnoea, hypopnoea syndrome : arousals, autonomic activity and home-based diagnosis / Kyra Dingli." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2011. http://d-nb.info/1025239199/34.
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