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https://hdl.handle.net/2440/68184
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Type: | Journal article |
Title: | Accurate position monitoring and improved supine-dependent obstructive sleep apnea with a new position recording and supine avoidance device |
Author: | Bignold, J. Mercer, J. Antic, N. McEvoy, R. Catcheside, P. |
Citation: | The Journal of Clinical Sleep Medicine, 2011; 7(4):376-383 |
Publisher: | The American Academy of Sleep Medicine |
Issue Date: | 2011 |
ISSN: | 1550-9389 1550-9397 |
Statement of Responsibility: | James J. Bignold, Jeremy D. Mercer, Nick A. Antic, R. Doug McEvoy, Peter G. Catcheside |
Abstract: | Study Objectives: Approximately 30% of obstructive sleep apnea (OSA) patients have supine-predominant OSA, and simply avoiding supine sleep should normalise respiratory disturbance event rates. However, traditional supine-avoidance therapies are inherently uncomfortable, and treatment adherence is poor and difficult to monitor objectively. This study evaluated the efficacy of a novel, potentially more acceptable position monitor and supine-avoidance device for managing supine-predominant OSA and snoring. Design and Setting: In-laboratory evaluation of position recording accuracy versus video recordings (validation study), and randomized controlled crossover trial of active versus inactive supine-avoidance therapy in the home setting (efficacy study). Patients: 17 patients undergoing in-laboratory sleep studies (validation) and 15 patients with supine-predominant OSA (efficacy). Interventions: Efficacy study: 1 week of inactive and 1 week of active treatment in randomized order, separated by 1 week. Measurements and Results: Agreement between 30-sec epoch-based posture classifications from device versus video records was high (median κ 0.95, interquartile range: 0.88-1.00), and there was good supine time agreement (bias 0.3%, 95%CI: −4.0% to 4.6%). In the efficacy study, apnea-hypopnea index (AHI) and snoring frequency were measured in-home using a nasal pressure and microphone based system during inactive and active treatment weeks. The position monitoring and supine alarm device markedly inhibited supine time (mean ± SEM 19.3% ± 4.3% to 0.4% ± 0.3%, p < 0.001) and reduced AHI (25.0 ± 1.7 to 13.7 ± 1.1 events/h, p = 0.030) but not snoring frequency. Conclusions: This new position monitoring and supine alarm device records sleep position accurately and improves OSA but not snoring in patients with supine-predominant OSA. |
Keywords: | Humans Sleep Apnea, Obstructive Snoring Monitoring, Physiologic Polysomnography Treatment Outcome Confidence Intervals Risk Factors Cross-Over Studies Age Factors Supine Position Reference Values Video Recording Adult Middle Aged South Australia Female Male Patient Positioning Clinical Alarms |
Rights: | Copyright status unknown |
DOI: | 10.5664/JCSM.1194 |
Published version: | http://www.aasmnet.org/jcsm/ViewAbstract.aspx?pid=28226 |
Appears in Collections: | Aurora harvest 5 Psychology publications |
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