Something I would recommend looking into if you can afford it, is the beds that automatically inflate to help relieve pressure spots. When my wife spent a month in the hospital last year, the bed in there had that. How long has she had the current mattress?
Perhaps find a physical therapist that can write up and fight for her needs. Good luck.
Gen 1 Glock 17 • Glock 17 RTF2 • Gen 2 19 • Glock 22 Gen4
Glock 23 RTF2 • Glock 27 Gen4 • HK USP 40
Ruger Mark III 22/45 • Advantage Arms LE 19/23 Kit
1896 Tula Mosin