How do you navigate PAP approval for patients with tracheobronchomalacia or excessive dynamic airway collapse who do not have OSA?

Since there is no insurance pathway for PAP for tracheobronchomalacia, we basically perform a sleep study and hope there is a small amount of OSA to treat. Otherwise, we find ways to get a machine for the patient at low cost. While there is theoretical benefit to using PAP for TBM there isn't much e...