Usefulness in using portable overnight pulse oximeter for screening obstructive sleep apnea in adult patients in primary health care setting
Author(s)
Author(s)
Chiang, L. K.
Ng, P. T. K.
Kam. C. W.
Ng, L. V.
Wong, C. Y.
Yee, K. S.
Tse, H. N.
Date Issued
2011
Publisher
The Hong Kong College of Family Physicians
Journal
The Hong Kong Practitioner
Volume
33
Issue
4
Start page
146
End page
152
Abstract
Objective: 1. To test the usefulness of using portable overnight pulse oximeter for obstructive sleep apnea screening in primary health care. 2. To assess the diagnostic accuracy of using portable overnight pulse oximeter for obstructive sleep apnea screening in primary health care.
Design: Prospective cross-sectional study. Subjects: 60 consecutive adult patients suspected to have obstructive sleep apnea (OSA) in a General Outpatient Clinic affiliated to a regional hospital of Hong Kong. Main Outcome measures: Overnight pulse oximetry derived oxygen desaturation index (ODI) and polysomnography (PSG) derived apnea hypopnea index (AHI). Results: 51 out of 60 patients (85%) were confirmed to have OSA by PSG study. 14.9 events/hr and 24.6 events/hr were detected by overnight pulse oximetry derived ODI and PSG derived AHI respectively. The ODI and AHI has a correlation coefficient of 0.7 (P < 0.0001) The mean and 1.96 SD of the difference between ODI and AHI is 9.7 events/hr and 30.4 events/hr respectively. Using case designation criteria of ≥5 events/hr for ODI, the sensitivity and specificity in diagnosis of OSA is 92% and 88% respectively. Conclusion: In a selected adult primary care population who are at risk for OSA, overnight pulse oximetry shows good correlation with polysomnography and has good screening performance as a screening tool for the diagnosis of OSA.
Design: Prospective cross-sectional study. Subjects: 60 consecutive adult patients suspected to have obstructive sleep apnea (OSA) in a General Outpatient Clinic affiliated to a regional hospital of Hong Kong. Main Outcome measures: Overnight pulse oximetry derived oxygen desaturation index (ODI) and polysomnography (PSG) derived apnea hypopnea index (AHI). Results: 51 out of 60 patients (85%) were confirmed to have OSA by PSG study. 14.9 events/hr and 24.6 events/hr were detected by overnight pulse oximetry derived ODI and PSG derived AHI respectively. The ODI and AHI has a correlation coefficient of 0.7 (P < 0.0001) The mean and 1.96 SD of the difference between ODI and AHI is 9.7 events/hr and 30.4 events/hr respectively. Using case designation criteria of ≥5 events/hr for ODI, the sensitivity and specificity in diagnosis of OSA is 92% and 88% respectively. Conclusion: In a selected adult primary care population who are at risk for OSA, overnight pulse oximetry shows good correlation with polysomnography and has good screening performance as a screening tool for the diagnosis of OSA.
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No
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