Thanks for your question. Metallosis, or increased blood levels of metallic ions, is a known complication of hip replacement surgery that uses metal on metal prosthesis. The maximum permissible level of Cobalt in blood is 5 micrograms / L. Though the levels of cobalt and chromium are above the acceptable limits, the implant doesn t need to be removed yet. If I was your treating doctor, I would try chelation therapy. Chelating agents are given by mouth or are injected into your body. These agents bind with the metal ions in your blood and get them out of the body. If chelation therapy does not work, a revision surgery would be required. I hope this helps. Please get back to me if you need any more information. All the best!