Can my mom file a claim of neglect against hospital that let her fall and injure herself will admitted?

My mother fell on her face while being "assisted" to the bathroom. She was admitted as a high fall risk due to a fall at home that required staples and treatment. She has neck pain, tailbone pain, and obvious head and eye pain. The hospital refuses to give us documentation or reports of this incident as well as another where a nurse "found" her on the floor in the middle of the night. They don't know how it happened even though each room is video monitored. All the lawyers I've contacted claim she hasn't suffered any debilitating damages or any further impairment and won't be able to help. I think my mother deserves some type of compensation for her suffering due to their neglect. Any help or advice is appreciated.