Analyzing Explanted Medical Device for Nickel Content

Looking for an expert laboratory to determine the nickel content in an explanted medical device. I had an FDA-cleared lumbar interbody fusion device (12mmx24mm) inserted into my spine last year. It was removed recently after months of intense pain and ongoing problems. It was discovered that I was highly allergic to the nickel in the device, so I need to know how much nickel it contains.