1. What kind of metal makes up the metal-on-metal hips?
A cobalt-chromium (CoCr) metal alloy.
2. What are the Common Problems/Symptoms with the ASR Hips Component?
Loosening, component misalignment, infections, bone fractures, dislocation, loss of muscle mass, unexplained hip pain, thigh and groin pain, pain when walking or rising from seated position, and clicking sounds. X-rays can also reveal metal debris, which can ultimately lead to inflammation of the surrounding tissue.
3. Who Discovered Problems and When?
The defects of the DePuy ASR were first documented by the Australian National Joint Replacement Registry in early 2008. The evidence presented clearly demonstrated a very high rate of failure concerning this device. Australia withdrew this device from the market in December 2009. Researchers from a British study also reported problems with the metal-on-metal implants causing adverse soft tissue reactions resulting from the friction of the metal-on-metal surfaces. These patients showed higher rates of wear and tear and soft tissue damage. The United States Food and Drug Administration did not participate in a recall despite this information. Hospitals and hip surgeons in the United States had been warned about the defects of this device, but continued to use it anyway, until DePuy voluntarily recalled the product in April 2010.
4. What Should I Do if I Received a Defective Hip Replacement?
Always consult your doctor or physician regarding health-related issues, but if you or someone you care about received defective joint replacement components, we would like to speak with you right away. DO NOT SIGN A RELEASE FROM THE SURGEON OR DePuy. It is imperative that you do NOT sign the release sent to you by your physician on behalf of DePuy.
5. How Can I Tell if I Have a Recalled Hip Device, such as the DePuy ASR?
By now, your surgeon should have contacted you on behalf of DePuy to notify you that your DePuy ASR implant has been recalled. If not, and you are having the symptoms below, contact your physician or the hospital where the surgery was performed and request a copy of the "chart stick" from your surgery.