@gardeningjunkie @montykona2 I think this is the lab in Chicago that you are speaking about.
https://www.orthopedicanalysis.com/
I had concerns and did their blood test for metal and implant allergies which was shipping in a warm blood sample so it stayed alive. I ran into resistance from a spine surgeon who would not authorize it saying it was not necessary, so I went to my GP and he authorized it. As patients we have to advocate for ourselves. One thing the test does is tell you what your immune response is right now before you are exposed to an implanted material (or for what is already in your body). That might change in time after exposure to a material and you can become allergic later even if a test had cleared you for an immune response. If you test positive, then you'll know what to avoid.

My test cleared me, and last year I broke my ankle and now have titanium plates and screws. After 6 months, I started having hives and have to stay on antihistamines. I also have some pain around the plates, so they will be removed. There are some other trace metals in the titanium, so it isn't pure, and those could be the culprits. The test was pricey, about $500, so I'm not going to repeat it now.