The effects of Provent on moderate to severe obstructive sleep apnoea during continuous positive airway pressure therapy withdrawal: a randomised controlled trial.
OBJECTIVES: The aim of this study was to test the effectiveness of Provent, an expiratory nasal resistance valve, to prevent the recurrence of OSA following CPAP withdrawal. DESIGN: Randomised, partially blinded, parallel, placebo-controlled trial. SETTING: Outpatient sleep clinics in the UK (Oxford) and Switzerland (Zurich). PARTICIPANTS: 67 patients with OSA receiving CPAP were randomised to one of three groups for 2 weeks: continuing CPAP, Provent or placebo Provent. MAIN OUTCOME MEASURES...Expand abstract
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