Had expressed my mother had dementia & had panic attacks when air did not automatically flow(she had to breath through her nose to activate), but the panicking induced mouth breathing. Took her to Emergency & she had basically been getting no oxygen. Nurse said that she had probably become to weak to activate the air flow. My Mom didnt make it out of the hospital. She has passed. Now I've been sitting here waiting for 4 hours of my day for them to pick up equipment & never showed.. NOT A FAN OF THIS COMPANY