@wannie .... sorry i dont know answer but just noticed your post and my first thought is; doesnt sound right to me that a knee replacement would end up with swelling, cold and pain in one foot!!

Nerve test can show normal but doesn't mean there isn't something else amiss ... there can be other reasons for pain, freezing, swelling besides 'nerves."

Did anyone ask the surgeon why a knee operation affected your foot.... Did you or could you ask your referring doctor..... can you get a copy of the operation report? Plus a copy of the "nerve test" results - I have a copy of my nerve test results, just requested it from my doctor at the time. It is all information on our file, we can request copies of correspondence, reports, etc. and i was not charged for copies. I even got last week a full printed copy of my former dentist file .....

I got copy of some of my file from our hospital in Ontario under freedom of information act.... not for legal purposes but I wanted copy as no longer have a family doctor.

my daughter has a few friends who have had knee surgery and i can ask her to ask them if they have any foot pain etc.... and am sure you will get some more comments from the many regulars on this site.... hope you get to the bottom of this issue. J.