(06-24-2015, 06:50 PM)fabriziolag Wrote: ...1.-The number of AHI means that CPAP detected and solved the apneas episodes
2.-The number of AHI are the ones that CPAP could`t Solve...
Your AHI is a summary report indexed to per hour of all apneas that you actually experience (and are not prevented or "solved"). An AHI of 4 for someone who slept exactly 8 hours would mean that they had exactly 32 unprevented
events, totaled, for that sleep session. That means that breathing was impaired about once every 15 minutes, on average.
So your AHI without xPAP is the number of events you had, indexed to a per hour number. AHI with xPAP is the same thing, except that with xPAP that number should be much lower than without it, because of the effectiveness of the therapy.
Rather than fix or "solve" apneas, CPAP prevents
most apneas, but not all. It appears that you have an auto machine, or APAP, which can prevent even more apneas by automatically modifying the pressure. That is the common prescription these days.
A consistent number averaging under 5 is the goal, and is an indicator of you no longer having sleep apnea (with the mask, of course). So congrats on successful therapy.
Some types of apneas are not able to be dealt with by xPAP, which primarily deals with obstructive events (and it can't prevent all of those, either). If you have a preponderance of other types of events, such as centrals and hypops, in your sleep study, they normally prescribe a ventilator-type machine instead of conventional xPAP.