AutoSet technology

Changes in sleep stage, weight, body position, and other factors can alter a patient’s airway pressure treatment requirements from night to night, hour to hour and breath to breath. At times they may need higher pressure to maintain airway patency, and at times their pressure needs may be lower. ResMed’s AutoSet automatic positive airway pressure (APAP) devices monitor a patient's airway on a breath-by-breath basis and deliver only the pressure that patients need—when they need it. 

  • Our AutoSet devices are designed to provide the minimum pressure required at each point in time to treat apnoeas/hypopneas and upper airway resistance.
  • Patients report better subjective sleep and achieve a significant reduction (37%) in median treatment pressure with consequently lower system leaks than fixed-pressure therapy (CPAP).1
  • Patients on treatment pressures of 10 cm H2O or higher, or who have side effects from CPAP treatment, experience more benefit from auto-adjusting therapy such as AutoSet.2,3,4
  • ResMed’s AutoSet devices use a patented algorithm that responds to flow limitation (the earliest sign of impending airway collapse), snoring and apnoea on a breath-by-breath basis.5-6



Teschler H, Wessendorf TE, Farhat AA, Konietzko N, Berthon-Jones M. Two months auto-adjusting versus conventional nCPAP for obstructive sleep apnoea syndrome Eur Respir J 2000;15(6):990-5.


Resta O, Carratu P, Depalo A, Giliberti T, Ardito M, Marrone O, Insalaco G. Effects of fixed compared to automatic CPAP on sleep in Obstructive Sleep Apnoea Syndrome. Monaldi Arch Chest Dis 2004;61(3):153-6.


Massie CA, McArdle N, Hart RW, Schmidt-Nowara WW, Lankford A, Hudgel DW, Gordon N, Douglas NJ. Comparison between automatic and fixed positive airway pressure therapy in the home. Am J Respir Crit Care Med 2003; 167(1):20-3.


Ayappa I, Norman RG, Hosselet JJ, Gruenke RA, Walsleben JA, Rapoport DM. Relative occurrence of flow limitation and snoring during continuous positive airway pressure titration. Chest 1998;114(3):685-90.


Farre R, Montserrat JM, Rigau J, Trepat X, Pinto P, Navajas D. Response of automatic continuous positive airway pressure devices to different sleep breathing patterns: a bench study. Am J Respir Crit Care Med 2002;166(4):469-73.