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Sensitivity and Specificity of Automated Portable Device for Diagnosing Sleep Apnea Syndrome(Morphase(R)) Tetsuri Kondo 1 , Koji Fukushima 2 , Tomie Iga 2 , Hiroshi Ishii 3 , Kazutaka Kamio 3 , Ichiro Kobayash 1 , Kenzo Nishiya 1 1Department of Medicine, Tokai University Oiso Hospital 2Department of Respiratory Medicine, Tokai University School of Medicine 3Tokai University Hospital Keyword: スクリーニング , 自動解析 , 睡眠障害 , screening test , automated analysis , sleep disorders pp.427-431
Published Date 2004/4/1
DOI https://doi.org/10.11477/mf.1404100292
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Summary

 We investigated the sensitivity and specificity of an automated portable device for diagnosing sleep apnea syndrome (Morphase(R)). In 20 patients who underwent a polysomnograph (PSG), Morphase(R) was concurrently applied. In another 46 patients who received screening test with Morphase(R), apnea-hypopnea indexes (AHIs) determined by the automated system and those with manual analyses were compared. There was a good correlation between AHI and respiratory distress indexes (RDIs) determined by PSG. The regression line was Y=0.608X-0.377 suggesting that Morphase(R) underestimates AHI by 40%. When RDI was corrected by actual sleep time, the regression line became Y=0.716X+0.216 suggesting that the contribution of sleep time to Morphase-determined AHI was approximately 10%. The regression line representing the relationship between automated AHI and manually determined AHI was Y=0.765X-1.593. This result suggested that the automated system underestimated AHI by 23%. When AHI was determined only from nasal pressure, AHIs were overestimated from 10 to 30/hr. In conclusion, Morphase(R) has a good specificity and sensitivity for determination of which patients require PSG study.


Copyright © 2004, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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