| Popis: |
Introduction: A new generation of miniaturized Automatic Positive Airway Pressure (APAP) devices has been recently launched into the market to respond to the growing patient mobility need, e.g. for travel. The reduced size of these devices puts in question their performance at stressing conditions such as high PAP and unintended leaks. Aim: To assess the performance of a new portable APAP device in a bench test using a servo-controlled simulated obstructive sleep apnea (OSA) patient. Method: The bench test simulator used in this study was described previously (Isetta, ERJ Open Res 2015). The simulated OSA patient exhibited different OSA patterns unless a PAP >12 cmH2O was applied. Each test started with 15 min of normal breathing to mimic the time before sleep onset, followed by 2 h of simulated OSA. The tested APAP device (AirMini, ResMed, Sydney) was connected to the simulated patient through AirFit N20 mask. Tests were performed with and without a leak (24 L/min at 10 cmH20) and with and without the heat/moisture exchanger (HME) (HumidX, ResMed, Sydney). Mean pressure (Pmean), maximum pressure (Pmax), time to reach breathing normalization (Tnorm) and residual apnea/hypopnea index (AHI) were measured. Results: Study results are summarized in the table. CONCLUSION: AirMini achieved breathing normalization in all test conditions. These data suggest that the portable AirMini device can perform similarly to the conventional APAP machines. Partially supported by Resmed. |
