Welcome, to the PN forum, Becky.

I am doing some searching on your question about platinum leaching and PN. This is going to take some time.

But for now, I have a few comments:

1) There is research on platinum containing drugs used for chemo in some cancers. These drugs cause PN, and the agent recommended to block this/prevent this/or minimize this is
acetyl-l-carnitine. This amino acid is also used for other toxic drug reactions which cause nerve damage.
So I would start using this ASAP... at least 2 grams a day.

2) Some drugs are used to block platinum toxicity... they are called sodium channel blockers...but all of them have side effects that are considerable. Discussion with a neurologist about this would be a good idea to see if it is a viable solution for you.

3) demyelination also occurs with some nutrient deficiencies.
I see you have a history of possible MS diagnosis. So that indicates to me you may have a significant problem with
B12/B6/folate. There is a new high dose RX only vitamin with all 3 in it, which was designed for neuropathic patients.
It is called Metanx. You can ask your doctor for this.
OR you can request a B12 test to see if you are low first.
If you have a genetic problem with methylation, and have had this for years...then your nervous system will fail eventually.
This is called the MTHFR mutation and is quite common. One sign of problems with it is elevated homocysteine, which can affect the retina of the eye.
The vitamins in Metanx are available OTC as well separately.
http://www.pamlab.com/Products,Metanx

Some people report autoimmune reactions to implants. Knee and hip replacements can be triggers for an autoimmune attack for those with genetic sensitivity.

I can understand that you are frantic. I would be too.

I will look around for you and come back to this post when I find something useful that I haven't shared already. I won't be responding to the post you made at MG. It will be here.