A laboratory validation study of the diagnostic mode of the Autoset system for sleep-related respiratory disorders.

摘要: We performed a validation study of the diagnostic mode Autoset system (ResMed, Australia) on group 44 snorers (10 women). compared result Autoset's automatic analysis nasal airflow (using prongs) to those an in-laboratory polysomnographic with Fleisch facemask pneumotachograph. For first 29 patients, software was set recognize only apneas; for remaining 15, modified both apneas and hypopneas. Relative polysomnography, overestimated number apneas. Oral breathing or displacement prongs partially explained these differences. A significant correlation found between apnea indices (AI) assessed by two methods (r = 0.98). AI 20/hour 100% sensitive 88% specific. The significantly underestimated hypopneas polysomnograph pneumotachograph (62.9 +/- 4.7 vs. 85.5 73.1, P 0.04), although apnea-hypopnea index 20, lack linearity volume evaluation at low volumes could explain most Our results indicate that system, in its mode, is useful tool identifying patients obstructive sleep syndrome. less mild moderate disordered breathing, where it may give erroneous results.