sleep apnea.

Patient A started treatment with CPAP after his initial fitting visit, when he was instructed on the machine's use and was fitted with a mask. Study staff identified a "salient positive" (any factor that was important to the patient that was expected to positively influence CPAP adherence) for Patient A as a desire to increase his daytime energy and reduce his daytime sleepiness. He did not report any negative concerns associated with CPAP therapy. He initially agreed to use a nasal mask but reported frustration with a sensation of low airflow. During an in-home follow-up visit in the first few weeks, Patient A requested a replacement mask that specifically fit over his nose and mouth. By the next week, he reported irritation from the strap that wrapped around the back of hisinterface configuration (left panel) with modification of the CPAP interface designed and implemented by Patient A (right panel)\
CPAP: continuous positive airway pressure](cureus-0011-00000004078-i01){#FIG1}

Patient B

Patient B was an 83-year-old previously healthy white woman who lived with her husband, an attorney, in a new, well-furnished home. She was functionally independent, traveled frequently, and was socially active in local civic and religious organizations. Despite careful review of her medical records confirming that she had had a stroke, the participant was in denial about this diagnosis, claiming that it was nothing more than a dizzy spell and that doctors were never able to confirm that she had a stroke. During her baseline assessment, she had normal blood pressure, no cognitive deficits, an NIHSS score of 0, and reported daytime sleepiness and fatigue. 

She was pleasant and