Sue, the information provided about an online metal allergy test is not meant to skip the need of a physician's input. It is simply another option to get things started. For example, a positive test via the test kit my help the patient get the surgeon to order the blood test for metal allergies. It seems that many physicians are reluctant to see the value of that allergy blood test.
My note was to share a personal experience. Following the at home test kit, and at the request of my "ortho" I had an allergist MD do additional testing. The allergy Dr. made the nickel allergy diagnosis and documented my ortho file.
The final words in my post were:
"Of course, diagnosis must come from a physician.
Best wishes in your journey with your knee implants."