Thank you for your question. This is certainly one where consultation from an Orthopaedic surgeon with experience in arthroplasty is necessary - in terms of the knee itself. Perhaps you could share why a repeat operation was required and how long ago it was undertaken?
From a pain perspective, is she taking regular analgesia for the symptoms and did she undergo rehabilitation post-operatively?
This might improve her strength and ability to mobilise.
From a weight perspective, has she consulted a dietician to look at her intake? Equally, has she considered non-impact/non-weight bearing exercise to help with weight loss?
Finally, have you considered alternative therapies for pain? I work very closely with an acupuncturist who often sees my patients with pain symptoms - it can help considerably.
Bw
Dr Dinesh
