Help mum bk on her feet

Needs urgent knee replacement very restricted with everyday living.

mumma is only 47 has been my mother and father all along done everything within her power to get me to where I am.she has had several set back including a spinal injury 15 years ago followed by being diagnosed with psoratic arthritis has been off work due to rencent knee surgery to try and repair the torn ligemnt however when surgeon looked inside he said no other alternative and needs a knee replacement the funds will be used for medical expenses as her savings have gone on recent medical expenses.