Father is sleeping with his mouth open and his tongue is obstructing breathing.

Does he have a prescription for a c-pap machine? Is he able to tolerate it with his dementia? I would imagine it might be difficult, but I do know of one dementia patient who was very familiar with hers and she did wear it pretty well every night. If he could tolerate the machine, it would help his breathing.

I use a nasal pillow, but you might try a pillow or a mask. AND to keep his tongue inside his mouth, you might try a CHIN STRAP. My uncle wears one. It wraps about the head and chin to hold the mouth closed. Of course, if he CAN'T breathe though is nose, that could be a problem The chin strap is good to use if you have a nasal pillow with c-pap. A professional should be able to review his condition and make recommendations. He may need a sleep study.

Is he getting home care post rehab, or is he still in a rehab facility? If the latter, ask for a pulmonary consult. If he's at home, and if he has a pulmonary doctor, try to get him in for an emergency appointment.

Besides keeping his head elevated when he sleeps, he might be eligible for nighttime oxygen or a C-PAP.

PamZimmrrt is I believe a respiratory specialist. She probably has some good on point medical advice if she sees this post and responds.

Can he sleep in a recliner with his legs up . My sister is quite obese and did that when she broke her ankle

Can you have him sleep in an inclined position until his leg heals?