"Cobalt levels are determined by micrograms per liter of blood. If a patient has between 1-5 micrograms per liter, he might experience heart and memory issues. If there are more than 7, the patient might feel hip pain and have either tissue necrosis or pseudotumors. "

Hi Sue,
I am new to this forum. Thank you for the very helpful information you've provided. I'm having revision hip replacement surgery a week from today after an MRI revealed a very large pseudocyst which caused unilateral leg swelling. After seeing the MRI results, my primary doctor sent me to my orthopedic surgeon, who quickly scheduled the surgery. My original right hip replacement was done in 2009. I've had no problems. My surgeon is excellent and did both hip replacements and both knees. Like your surgeon, mine used a DePuy implant which would last longer, as I was 56 years old. . . . A few days ago, after looking at your forum and a few journal articles, I asked to have my cobalt and chromium levels tested. Just got the cobalt results: 8.2 mg/L. I am curious about the above statement regarding levels. I do have idiopathic cardiomyopathy. (And I've had shortness of breath for a couple of years.) But an article I read from the Joint and Bone Research journal states that it would probably take levels about 250 mg/L to cause cardiomyopathy. When I read the above quotation, I was curious.

I haven't had any symptoms in my left hip, but I'm thinking now that it might be a matter of time.

I am most afraid of dislocation. I plan to strictly adhere to restrictions for the three months. I have wondered how common dislocation is after revision surgery.

At any rate, I am heartened by your story and look forward to being on the other side of this!