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Comparison of three auto-adjusting positive pressure devices in patients with sleep apnoea

Respiratory Sleep Disorders Unit, St. Vincent’s University Hospital, Dublin, Ireland

CORRESPONDENCE: W. T. McNicholas, Dept of Respiratory Medicine, St. Vincent’s University Hospital, Elm Park, Dublin 4, Ireland, Fax: 353 12697949. E-mail: walter.mcnicholas{at}ucd.ie

Keywords: Auto-adjustable positive airway pressure therapy, compliance, continuous positive airway pressure therapy, obstructive sleep apnoea syndrome, quality of life

Received: November 1, 2005
Accepted March 13, 2006

Auto-adjustable continuous positive airway pressure (APAP) devices are an emerging treatment alternative to fixed-pressure continuous positive airway pressure (CPAP) therapy for obstructive sleep apnoea syndrome. They have been engineered to automatically adjust the pressure to the optimal level on a continuous basis. However, not all APAP technologies use the same algorithm. Three different APAP devices (Autoset Spirit, Breas PV 10i and RemStar Auto) were compared in a randomised crossover trial in patients already established on fixed-pressure CPAP therapy. The outcome measures were compliance, quality of life and side-effects.

Twenty-seven middle-aged patients (25 male) previously diagnosed with severe obstructive sleep apnoea syndrome (median (interquartile range) apnoea/hypopnoea index 48 (29–76)), established on CPAP therapy for >3 yrs, were randomised to each APAP device for 4 weeks.

Mean pressure and patient compliance were significantly lower on the Breas PV 10i than on the other APAP devices. The devices were similar in terms of quality of life, daytime sleepiness and upper airway side-effects, but patients evaluated them significantly differently in terms of device features, sleep quality and pressure comfort, with the Breas PV 10i being the least popular.

Auto-adjustable positive airway pressure devices differ in pressure delivery and patient compliance in obstructive sleep apnoea syndrome patients.

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