Especially the operation of lumbar spondylosis is particularly difficult! It is likely to damage other places when doing surgery. Even if the operation is successful, it is likely to bring other complications, so surgery is not the first choice for the elderly.
I suggest that you let the elderly sleep on a hard bed, which is beneficial to the recovery of lumbar spondylosis. Don't let him do strenuous exercise, but don't sit still. Now, you can find a better Chinese medicine practitioner, treat him with Chinese medicine, and then check whether there is any exercise to treat lumbar spondylosis, so that he can carry out effective exercise in a targeted manner. If things get better, you don't have to consider surgery.