Assessment of airflow obstruction during CPAP by means of forced oscillation in patients with sleep apnea.
作者： DANIEL NAVAJAS , RAMÓN FARRÉ , MAR ROTGER , RAMÓN BADIA , MARINA PUIG-de-MORALES
DOI: 10.1164/AJRCCM.157.5.9710026
关键词:
摘要: The forced oscillation technique (FOT) is a noninvasive method to measure respiratory resistance (Rrs) potentially useful for monitoring upper airway obstruction in patients with obstructive sleep apnea/ hypopnea syndrome (SAHS). aim of this work was test the clinical suitability FOT assessing dynamic changes airflow SAHS during continuous positive pressure (CPAP) and investigate CPAP dependence Rrs. Forced (5 Hz) applied six male submitted titration procedure. Esophageal measured balloon-tipped catheter. Mid-inspiratory (Rrs,i), mid-expiratory (Rrs,e), esophageal swings ( Δ Pes) were computed events recorded at each level. Rrs,i decreased markedly significantly from 36.0 ± 4.0 cm H2O · s/L (mean SEM) baseline (4 H2O) 13.1 2.8 optimal (11.3 0.4 H2O). Rrs,e showed faster d...
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