In addition, the cyst of the clivus rarely, if large, could compromise air flow through the naso-pharynx and thus add an obstructive component to your
sleep apnea. In suggesting that
bipap “doesn’t work that well” I’m not sure if you are saying it was properly used but ineffectual or that you were unable to tolerate the apparatus. If the latter, you should work closely with members of the nearest advanced Sleep Lab to make it work for you.