[pavulon]

Hip replacement patients tend to do well and the post-op pain tends to be less than knee arthroplasty. Sounds like his health is good but there is no ignoring his age. If he were my dad, I'd need to do something like an equation with him. Does the risk of surgery (bleeding, infection, cardiac or neuro (stroke) problems, falling post-op) exceed the potential benefit of bettered quality of life? One thing to include there is that as his hip worsens over time, he may be more prone to falls...and lots of elderly people end-up dying (for various reasons related to stress and hospitalization/recovery) after falling and breaking a hip. Good luck!