Should i contact an attorney in this situation?

My mother is 92 and in a nursing home. she is deaf and a cripple. she cannot stand or walk. In June, 2010, my mother fell out of her wheelchair, at the nursing home, and hit her head. She was taken to an ER and released. We took no action against the nursing home, at that time. I asked the nursing home nurses to always keep my mother strapped into her wheelchair. On Sept. 25, 2010, my mother again fell out of her wheelchair. She landed facefirst on a concrete floor. Six stitches to close the cut on her head. She was not strapped in her wheelchair as requested in June. Qustion: Falling out of a wheelchair one time is deplorable for an elderly person. Falling out a second time with injuries, is unbelievable. I have legal Power of Attorney over my mother. Should i contact an attorney and file a lawsuit?