Comparison between the Apnea-Hypopnea Indices Determined by the REMstar Auto M Series and Those Determined by Standard In-Laboratory Polysomnography in Patients with Obstructive Sleep Apnea
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概要
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Objective Continuous positive airway pressure (CPAP) is an effective treatment for obstructive sleep apnea (OSA). After performing an initial titration study, most physicians do not have the CPAP equipment retitrated unless the patient complains about the CPAP use. Several automated CPAP devices are used clinically that can detect upper airway obstructive events and provide information about residual events while patients are on CPAP. The aim of this study was to compare the apnea-hypopnea index (AHI) determined by automated CPAP devices to that obtained from polysomnography. Methods Patients with OSA underwent polysomnography for CPAP titration using the REMstar Auto M-series. The initial two hours of CPAP titration were spent at a subtherapeutic pressure of 4 cmH2O so that more breathing events could be observed. The correlations between the simultaneous determination of the AHI with polysomnography (AHI-PSG) and the automated device (AHI-RAM) during the subtherapeutic, therapeutic and overall phases were evaluated. In addition, the apnea index (AI) and the hypopnea index (HI) were each evaluated separately. Results Sixty patients were enrolled. The mean AHI on diagnostic PSG was 35.2±2.6 events/hour. Strong correlations were observed between the AHI-PSG and the AHI-RAM (subtherapeutic: r=0.958, p<0.001; therapeutic: r=0.824, p<0.001; overall: r=0.927, p<0.001). A slightly stronger correlation was observed between the AI values, whereas a weaker correlation was observed between the HI values in all three phases. Conclusion Strong correlations between the AHI-PSG and the AHI-RAM were observed. The correlations were weakened when the analysis was limited to the HI and the therapeutic phase.
著者
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Narui Koji
Sleep Center Juntendo University School Of Medicine
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Takaya Hisashi
Sleep Center Toranomon Hospital
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Kasagi Satoshi
Sleep Center Toranomon Hospital
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Kasai Takatoshi
Sleep Center Toranomon Hospital
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Kasai Takatoshi
Sleep Center, Toranomon Hospital, Japan
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Ishiwata Sugao
Clinical Physiology, Toranomon Hospital, Japan
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Ikeda Yukiko
Sleep Center, Toranomon Hospital, Japan
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Kawana Fusae
Sleep Center, Toranomon Hospital, Japan
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