Comparison of respiratory inductive plethysmography and thoracic impedance for apnea monitoring

摘要: Thoracic impedance apnea monitors may fail to detect obstructive apnea, falsely alarm when the infant is breathing, and confuse cardiac artifact with respiratory impedance. Therefore, we compared performance of a inductive plethysmograph thoracic monitor reliable measure airflow, either nasal CO 2 or pneumotachograph, during 29 studies in 28 patients referred for sleep laboratory evaluation. Sleep time averaged 72±37 (SD) minutes. The inductance plethysmography detected 99.6%±0.6% 98.3%±3.0% breaths, respectively. However, two studies, many extra once because cardiac-induced changes partial airway obstruction-induced changes. In 11 was sometimes misinterpreted as breath by monitor. monitor, but not plethysmograph, missed breaths following sighs 16 studies. Both all 60 episodes central apnea. 35 38 identified only such events. Apnea faisely four times 14 These results suggests that would have significant advantages over monitoring, including ability freedom from artifact.