My reply to her concerns are:
ASV in auto mode is a completely automatic, self-titrating positive air pressure device that only has 4 settings, EPAP min, EPAP max, PS min and PS max. the Resmed Clinical Titration Guide (below), recommends an initial starting pressure of EPAP min 4.0, EPAP max 15.0, PS min 3.0 and PS max 15.0. The EPAP automatically titrates to mitigate obstruction, and pressure support is maintained at the minimum setting for comfort, and servo regulated to maintain the target minute vent as-needed, when-needed. The titration of an auto ASV consists of consideration of CPAP history of obstruction, and minimizing the range of EPAP pressure and pressure support to optimize. A clinical study rarely achieves this as well as a coached home user, using day by day data to quickly narrow the ranges for efficacy and comfort. Clinical studies are affected by the environment in which they are conducted, the short period of time available to observe an often unpredictable central or apneic response, and bias to demonstrate efficacy of the lowest cost, option to meet short-term study endpoints.
Based on your history with CPAP, you normally control obstructive events with EPAP 6.0, and have generally comfortable results with PS min 3 (same as EPR 3). The titration of maximum EPAP and Maximum PS is a simple matter of trial and error and is quickly determined by observation. The machine maintains an overall safe and efficacious therapy pressure with its automatic algorithm, and this is actually preferable to a clinical titration for many reasons. You should request that the prescription be written for Resmed Aircurve 10 Vauto (HCPCS #E0471) in ASV Auto mode, with recommended EPAP min 6.0, EPAP max 9.0, PS min 3.0 and PS max 15.0 based on CPAP history and recommended titration guidelines by Resmed. These pressures can be observed for efficacy and comfort, and adjusted as needed with physician supervision.
I don't want to overstate this, but I have personally revised dozens to hundreds of sub-optimal ASV clinical titrations with better results, simply by observing results in Oscar and making logical changes that consider the individual's needs and response to the device. I can honestly say, most clinical titrations result in prescribing an ASV set to default settings, or using a fixed ASV mode (fixed EPAP) that fails to deliver effective or comfortable results. The best approach to this therapy does not come from a sleep lab. We rarely fail, we have never hurt anyone, and you continue to work with your treating physician...we just make it easier, cheaper (free) and better. Medicare and Insurance actually will cover titration, but neither requires this study that costs more than the device. The determination of your need and benefit of ASV remains in the hands of your doctor (treating physician). Avoid specialists as much as possible.