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VOLUME 4 , ISSUE 4 ( October-December, 2009 ) > List of Articles

ORIGINAL ARTICLE

Accuracy of an ambulatory device for the diagnosis of sleep disordered breathing

David Cunnington, Himanshu Garg, Harry Teichtahl

Keywords : obstructive sleep apnea, polysomnography, diagnosis, ambulatory monitoring, physiologic monitoring

Citation Information : Cunnington D, Garg H, Teichtahl H. Accuracy of an ambulatory device for the diagnosis of sleep disordered breathing. Indian Sleep Med 2009; 4 (4):143-148.

DOI: 10.5005/ijsm-4-4-143

License: CC BY-SA 4.0

Published Online: 01-12-2009

Copyright Statement:  Copyright © 2009; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Objective: This study aimed to evaluate the accuracy of the portable SomtéTM (Compumedics Limited, Melbourne, Australia) sleep data acquisition device against the current gold-standard of technician-attended, laboratory-based polysomnography (PSG) for the diagnosis of sleep disordered breathing (SDB). Methods: Patients attending the sleep disorders laboratory for overnight PSG for the evaluation of suspected SDB were fitted with both the Somté device and a PSG system (Compumedics ESeries). An apnea-hypopnea index (AHI) was calculated after manual scoring of respiratory events recorded using the Somté and PSG systems. Results: 37 patients (29 male, 8 female) participated in the study. The mean difference between the AHI estimated by the two devices showed good agreement, with the Somté device AHI being similar to that obtained by PSG. Mean difference (PSG – Somté AHI), -0.5 events per hour (95% CI -4.4 to 5.4, p=0.83). The Somté device was able to correctly classify the presence or absence of SDB (defined as PSG AHI e”15) with a sensitivity of 96%, specificity of 83%, positive predictive value of 92% and a negative predictive value of 91%. Conclusion: The Somté device accurately detects respiratory events during sleep and can be used to diagnose SDB in patients referred for the evaluation of sleep disordered breathing.


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  1. Young T, Palta M, Dempsey J, Skatrud J, Weber S, Badr S. The occurrence of sleep-disordered breathing among middle-aged adults. N Engl J Med. 1993;328(17):1230-5.
  2. Reddy EV, Kadhiravan T, Mishra HK, Sreenivas V, Handa KK, Sinha S, et al. Prevalence and risk factors of obstructive sleep apnea among middle-aged urban Indians: a community-based study. Sleep Med. 2009 Sep;10(8):913-8.
  3. Sharma SK, Kumpawat S, Banga A, Goel A. Prevalence and risk factors of obstructive sleep apnea syndrome in a population of Delhi, India. Chest. 2006 Jul;130(1):149-56.
  4. The burden of overweight and obesity in the Asia-Pacific region. Obes Rev. 2007 May;8(3):191-6.
  5. Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of overweight and obesity in the United States, 1999-2004. Jama. 2006 Apr 5;295(13):1549-55.
  6. Young T, Evans L, Finn L, Palta M. Estimation of the clinically diagnosed proportion of sleep apnea syndrome in middleaged men and women. Sleep. 1997 Sep;20(9):705-6.
  7. Flemons WW, Douglas NJ, Kuna ST, Rodenstein DO, Wheatley J. Access to diagnosis and treatment of patients with suspected sleep apnea. Am J Respir Crit Care Med. 2004 Mar 15;169(6):668-72.
  8. Parra O, Garcia-Esclasans N, Montserrat JM, Garcia Eroles L, Ruiz J, Lopez JA, et al. Should patients with sleep apnoea/ hypopnoea syndrome be diagnosed and managed on the basis of home sleep studies? Eur Respir J. 1997;10(8):1720-4.
  9. Kapur VK, Rapoport DM, Sanders MH, Enright P, Hill J, Iber C, et al. Rates of sensor loss in unattended home polysomnography: the influence of age, gender, obesity, and sleep-disordered breathing. Sleep. 2000;23(5):682-8.
  10. Chesson AL, Jr., Berry RB, Pack A. Practice parameters for the use of portable monitoring devices in the investigation of suspected obstructive sleep apnea in adults. Sleep. 2003 Nov 1;26(7):907-13.
  11. Rechtschaffen A, Kales A. A Manual of Standardized Terminology and Scoring System for Sleep Stages in Human Subjects. Washington, DC: National Institutes of Health; 1968.
  12. Sleep-related breathing disorders in adults: recommendations for syndrome definition and measurement techniques in clinical research. The Report of an American Academy of Sleep Medicine Task Force. Sleep. 1999 Aug 1;22(5):667-89.
  13. Simel D, Feussner J, DeLong E, Matchar D. Intermediate, indeterminate, and uninterpretable diagnostic results. Med Decis Making. 1987;7(2):107-14.
  14. Flemons WW, Littner MR, Rowley JA, Gay P, Anderson WM, Hudgel DW, et al. Home diagnosis of sleep apnea: a systematic review of the literature. An evidence review cosponsored by the American Academy of Sleep Medicine, the American College of Chest Physicians, and the American Thoracic Society. Chest. 2003 Oct;124(4):1543-79.
  15. Sackett DL, Haynes RB, Guyatt G, Tugwell P. The interpretation of diagnostic data. Clinical Epidemiology: a basic science for clinical medicine. 2nd edition ed. Boston: Little, Brown and Company; 1991. p. 69-152.
  16. Fagan TJ. Letter: Nomogram for Bayes theorem. N Engl J Med. 1975 Jul 31;293(5):257.
  17. Zucconi M, Ferini-Strambi L, Castronovo V, Oldani A, Smirne S. An unattended device for sleep-related breathing disorders: validation study in suspected obstructive sleep apnoea syndrome. Eur Respir J. 1996 Jun;9(6):1251-6.
  18. Verse T, Pirsig W, Junge-Hulsing B, Kroker B. Validation of the POLY-MESAM seven-channel ambulatory recording unit. Chest. 2000;117(6):1613-8.
  19. Emsellem HA, Corson WA, Rappaport BA, Hackett S, Smith LG, Hausfeld JN. Verification of sleep apnea using a portable sleep apnea screening device. South Med J. 1990 Jul;83(7):748-52.
  20. Norman RG, Ahmed MM, Walsleben JA, Rapoport DM. Detection of repsiratory events during NPSG: nasal cannula/ pressure sensor versus thermistor. Sleep. 1997;20(12):1175-84.
  21. Teichtahl H, Cunnington D, Cherry G, Wang D. Scoring polysomnography respiratory events: the utility of nasal pressure and oro-nasal thermal sensor recordings. Sleep Med. 2003 Sep;4(5):419-25.
  22. Wang D, Teichtahl H, Drummer O, Goodman C, Cherry G, Cunnington D, et al. Central sleep apnea in stable methadone maintenance treatment patients. Chest. 2005 Sep;128(3):1348-56.
  23. Hosselet J, Ayappa I, Norman RG, Krieger AC, Rapoport DM. Classification of sleep-disordered breathing. Am J Respir Crit Care Med. 2001 Feb;163(2):398-405.
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