Titration with automatic continuous positive airway pressure in obstructive sleep apnea

Area of Science:

• Sleep Medicine
• Respiratory Therapy
• Medical Device Technology

Background:

• Autotitrating positive airway pressure (APAP) is a standard method for determining optimal positive airway pressure (PAP) for obstructive sleep apnea (OSA).
• The necessary duration of APAP monitoring to establish a fixed PAP level is not well-defined.

Purpose of the Study:

• To evaluate PAP level variations from APAP devices at different treatment stages.
• To determine the required APAP treatment duration for achieving a stable and effective PAP level.

Main Methods:

• A cross-sectional study involved 62 newly diagnosed OSA patients after 3 months of APAP therapy.
• APAP data were collected at day 1 (D1), week 1 (W1), week 7 (W7), and week 12 (W12).
• Pressure behavior was analyzed by comparing P95th levels between W12 and W7, W12 and W1, and W12 and D1.

Main Results:

• High correlations were observed between P95th pressure levels at W12 and earlier time points (D1, W1, W7), with increasing correlation over time.
• Significant concordance differences were found between W12-W7 and W12-D1 within a ±2 cmH2O range.
• No significant difference in concordance was found between W12-W7 and W12-W1.

Conclusions:

• One week of APAP therapy is likely sufficient to determine an effective and stable PAP level.
• The established PAP level is accurate within a ±2 cmH2O pressure range.