NCT01210261

New Versus Existing Auto-titrating CPAP Device to Treat Obstructive Sleep Apnea in Adults

New Versus Existing Auto-titrating CPAP Device to Treat Obstructive Sleep Apnea in Adults: Randomised Non-inferiority Double Blinded Trial.

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (actual)
• Sponsor: Compumedics Limited · Industry
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Obstructive sleep apnea (OSA) is a condition of disordered breathing characterised by intermittent partial and/or complete upper airway obstruction during sleep. The participants, naive to nasal continuous positive airway pressure (CPAP), recently diagnosed with OSA, will undergo two automatic CPAP titration studies with collection of polysomnographic (PSG) data. The data will be analysed to assess effectiveness of Compumedics auto-CPAP device in the normalisation of sleep disordered breathing in OSA patients, with respect to another auto-CPAP device.

Detailed description

Auto-titrating CPAP (APAP) using algorithms based on detection of flow limitation and snoring have been developed. Auto-titration devices adjust nasal pressure to the minimum pressure needed to maintain airway patency at any point in time and can accommodate a range of background states that affect airway collapsibility and hence CPAP pressure requirement including sedation, alcohol, airway inflammation, body position and sleep state. Compumedics Limited has developed an APAP device (Somnilink SPAP based on the new algorithm technology of characterising breaths and determination of inspiratory flow limitation. The objectives of this new technology are to enable accurate detection of inspiratory intervals for irregular breathing patterns that are likely to occur during REM sleep, sleep onset and wakefulness as well as to provide correct characterisation of inspiratory flow limitation. These features could translate in delivery of superior treatment because of improved sensitivity and specificity of respiratory event detection and earlier pressure response to inspiratory flow limitation. Demonstration of superiority of the Somnilink SPAP device relative to existing APAP treatment devices will be subject of future clinical trials (beyond the scope of this protocol). An early clinical trial of a pre-production version of Somnilink SPAP with the pressure control algorithm identical to the production version established non-inferiority for AHI relative to a reference APAP (Resmed Autoset Spirit) with the differential AHI estimate of -0.91 \[-2.80; 0.91\] (Mean \[95%CI\]). The Somnilink SPAP device is now available as a production version (CE and TGA approved) and the purpose of the current study is to establish its non-inferiority compared to an existing APAP device (Resmed Autoset S8). The treatment will be administered on the two nights of polysomnographic studies (PSG) by means of continuous air pressure delivery under the variable pressure levels determined by the APAP device to maintain the upper airway patency. The population of adult patients newly diagnosed with OSA after undergoing a diagnostic PSG study in the sleep laboratory with no previous CPAP treatment experience and complying with the eligibility criteria (as outlined below) will be studied.

Conditions

• Sleep Apnea, Obstructive

Interventions

Type	Name	Description
DEVICE	Compumedics Somnilink SPAP - Auto-titrating CPAP	Subjects will undergo the auto-titrating CPAP treatments in the Monash Sleep Centre with the test and reference devices during two nights in random order. There will be an interval of at least seven days between the two treatments to eliminate the carryover effect. Full polysomnographic (PSG) recording will be conducted during both treatment nights. The recorded physiological signals during PSG will include signals identical to those used during the baseline diagnostic PSG. The patients fill KSS questionnaire immediately after the PSG study. All PSG recordings (both treatment studies and the baseline diagnostic study) will be scored according to the AASM rules by the same sleep technician blinded to the presence and type of auto-titrating CPAP treatment.
DEVICE	Resmed Autoset S8 - Auto-titrating CPAP	Subjects will undergo the auto-titrating CPAP treatments in the Monash Sleep Centre with the test and reference devices during two nights in random order. There will be an interval of at least seven days between the two treatments to eliminate the carry-over effect. Full polysomnographic (PSG) recording will be conducted during both treatment nights. The recorded physiological signals during PSG will include signals identical to those used during the baseline diagnostic PSG. The patients fill KSS questionnaire immediately after the PSG study. All PSG recordings (both treatment studies and the baseline diagnostic study) will be scored according to the AASM rules by the same sleep technician blinded to the presence and type of auto-titrating CPAP treatment.

Timeline

• Start date: 2011-05-01
• Primary completion: 2011-10-01
• Completion: 2011-10-01
• First posted: 2010-09-28
• Last updated: 2012-04-05

Locations

1 site across 1 country: Australia