Oracle mask

Has anyone tried the Oracle 457 mouth breather mask? I've tried everything to keep my tongue in the roof of my mouth, with complete failure. I have every chin strap made and some I made, every full face mask and lots of nasal mask and tape. Also a pile of C collars. I haven't slept in so long, I can't function. My heart is damaged from apnea. I need a mask that works.

Sorry you are having such difficulty. There are over 200 reviews here - https://www.cpap.com/productpage/fisher ... -cpap-mask

The mask is not highly rated.

Have you seen an ENT for an examination and discussion?