My 85 yr old mother with dementia has fallen down trying to get to the bathroom at night. Any suggestions?

Your mother with dementia requires memory care with 24/7 supervision. Any useful aids are useless with her lack of judgment.

Tips4Gen: Use a bedside commode.

My father had to have a foley catheter put in his urethra connected to a drainage bag. At first we vowed to have it removed at the first urologist appointment which was a month away. During those 30 days he never had to walk to the bathroom at night or even during the day because urine just drains into the bag via the tube. We were taking care of him 24/7 at that point. So then it became important for us not to wake him up at night going to the bathroom so we started urinating into plastic gallon ice tea containers so as not to trek into the one bathroom. His bag and our containers were then emptied in the morning. So his foley catheter turned out to be a great win for us. He was 85 when he started with the foley. It worked for us.

I feel like a lot of the answers here are not taking into account the almost primal desire of certain people to go to the actual toilet when they get the urge. There's no way my 96-year-old mother is going to let herself pee in the bed no matter what she is wearing. She's not going to sit in a bedside commode. She's not going to press an alarm button. For us, there has been no substitute for motion activated camera that catches the movement if she sits up, because a bed alarm will wake us too often when she's merely moving around. So we have a Blink Mini brand camera, aimed just high enough so if she sits up to get out of bed, an alarm will wake one of us who is on duty to sleep nearby that night.

Your mom needs to be using a call button so someone can help her safely use the bathroom. If she is living by herself. Your mom should not be living alone.

Bedside commode. Diapers, purewick many choices

Some places have a pad that goes under the resident, and if they get up an alarm goes off. My Mom had these as she has had multiple falls where she tried to get up and her legs were not strong enough to hold her up so down she went.

We have a bed rail for the upper part of my 93 yr old mothers bed with a call button that I tie to the rail whenever she lays down for a nap or to go to bed. It is wirelessly connected to a bed pad alarm under her mattress pad so she can buzz us to come help her get up. Works like a charm to alert us when she either presses her button to call us OR the bed pad alarm alerts us if she gets up without pressing her button to call.

The products I found on Amazon and are from Lunderg. We also have to have the same products only for chairs when she is in the living room or kitchen. We have a chair pad alarm on her kitchen chair and one on her recliner.
We also have a baby monitor that allows me to see her in her bedroom and another that allows me to see her in the living area. I can carry the little monitor everywhere and keep an eye on mom while I do chores or am out of the room for a bit. The cameras are radio controlled and NOT WIFI connected. HelloBaby is the name of the baby monitor.

Good luck

Is she in her own home?

Dim lights on in her bedroom and hallway and bathroom every night.
Tape the light switches if you have to so they stay on 24 hours.

Have you tried putting a bedside commode right next to her bed, so she doesn't have to travel far to pee or poop?
Or have you tried having her wear Depends at night so she doesn't have to worry about getting up?
I sure hope that your mom with dementia isn't living by herself anymore.