OBJECTIVE: Altitude can affect the diagnostic accuracy of portable monitors used to diagnose suspected obstructive sleep apnea syndrome on the basis of oxygen desaturation measurements. The aim of this study was to determine agreement between the desaturation index measured by oximetry and the apnea-hypopnea index measured by polysomnography in Mexico City (2240 m above sea level). We also wished to determine agreement between the desaturation index and the respiratory disturbance index measured by monitoring airflow with a single-channel recording device. PATIENTS AND METHODS: We used standard polysomnography and nocturnal oximetry to simultaneously measure the apnea-hypopnea index and the desaturation index, respectively, in a group of 38 patients aged over 18 years with suspected obstructive sleep apnea syndrome. In a second group of 30 patients, we compared the desaturation index to the respiratory disturbance index, which we measured using a single-channel device monitoring nasal airflow. RESULTS: The mean (SD) intraclass correlation coefficient between the apnea-hypopnea index and the desaturation index was 0.89 (0.03) (95% confidence interval, 0.83-0.96), and the mean of the differences was -0.9 (14.2). The mean intraclass correlation coefficient for the desaturation index and the respiratory disturbance index was 0.93 (0.02) (95% confidence interval, 0.89-0.97), and the mean of the differences was -6.6 (8.3). CONCLUSIONS: Agreement was high between the desaturation index and both the apnea-hypopnea index and the respiratory disturbance index in adults with suspected obstructive sleep apnea syndrome in Mexico City.
OBJECTIVE: Altitude can affect the diagnostic accuracy of portable monitors used to diagnose suspected obstructive sleep apnea syndrome on the basis of oxygen desaturation measurements. The aim of this study was to determine agreement between the desaturation index measured by oximetry and the apnea-hypopnea index measured by polysomnography in Mexico City (2240 m above sea level). We also wished to determine agreement between the desaturation index and the respiratory disturbance index measured by monitoring airflow with a single-channel recording device. PATIENTS AND METHODS: We used standard polysomnography and nocturnal oximetry to simultaneously measure the apnea-hypopnea index and the desaturation index, respectively, in a group of 38 patients aged over 18 years with suspected obstructive sleep apnea syndrome. In a second group of 30 patients, we compared the desaturation index to the respiratory disturbance index, which we measured using a single-channel device monitoring nasal airflow. RESULTS: The mean (SD) intraclass correlation coefficient between the apnea-hypopnea index and the desaturation index was 0.89 (0.03) (95% confidence interval, 0.83-0.96), and the mean of the differences was -0.9 (14.2). The mean intraclass correlation coefficient for the desaturation index and the respiratory disturbance index was 0.93 (0.02) (95% confidence interval, 0.89-0.97), and the mean of the differences was -6.6 (8.3). CONCLUSIONS: Agreement was high between the desaturation index and both the apnea-hypopnea index and the respiratory disturbance index in adults with suspected obstructive sleep apnea syndrome in Mexico City.
Authors: Eman S-D Khalil; Ehab I Mohamed; Gihane I Khalil; Samera M Sallam; Shaimaa S Mohamed; Salah S Naga; Mohamed N Mowafy Journal: Sleep Breath Date: 2012-06-09 Impact factor: 2.816
Authors: Eva Libman; Catherine Fichten; Laura Creti; Kerry Conrod; Dieu-Ly Tran; Roland Grad; Mary Jorgensen; Rhonda Amsel; Dorrie Rizzo; Marc Baltzan; Alan Pavilanis; Sally Bailes Journal: Sleep Disord Date: 2016-06-16
Authors: Eduardo Luiz Pereira da Silva; Rafael Pereira; Luciano Neves Reis; Valter Luis Pereira; Luciana Aparecida Campos; Niels Wessel; Ovidiu Constantin Baltatu Journal: Medicine (Baltimore) Date: 2015-01 Impact factor: 1.889
Authors: Margarita Reyes-Zúñiga; Armando Castorena-Maldonado; José Luis Carrillo-Alduenda; Rogelio Pérez-Padilla; Araceli Martínez-Estrada; Leonardo Gómez-Torres; Luis Torre-Bouscoulet Journal: Open Respir Med J Date: 2012-10-02