Artikel
Comparison of the desaturation index (DI) with the Respiratory-Disturbance-Index (RDI) in children
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Veröffentlicht: | 22. September 2005 |
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Introduction: The obstructive sleep apnea syndrome (OSAS) in children shows important differences in its pathophysiology compared to adults. Children more often display episodes of hypoventilation without distinct abrupt desaturations.
Methods: Computerized polysomnography was performed in 30 children with suspected OSAS. Apneas and Hypopneas were scored according to the criterias of the American Thoracic Society. The desaturation index was calculated from data from the oxygen saturation probe. Agreement between the RDI and the desaturation index was examined by using statistical analyses.
Results: Mean RDI was 6,24/h, mean DI was 3,14/h. The correlation between the two indices was poor (Spearman-Rho correlation 0,57). The mean of the differences between RDI and DI was 3,1 (limits of agreement 0,83 to 5,37). The sensitivity and specifity of simple oxymetrie for diagnosing OSAS in children (RDI>=1) was 79% respectively 40%.
Discussion: Simple oximetry measurements cannot replace laboratory polysomnography, which remains the golden standard in diagnosing OSAS in children.