Federal regulators have taken numerous steps to ensure that manufacturers providing metal-on-metal hip replacement systems are following stringent guidelines and adhering to several reporting procedures.
These steps come in the wake of thousands of failures of metal-on-metal hip replacement systems, such as the Pinnacle system made by DePuy Orthopaedics, a subsidiary of Johnson & Johnson.
There is lots of buzz around the Depuy Hip Replacement Lawsuit
Metal-on-metal hip replacement systems use a metal ball and joint, rather than a plastic or ceramic joint. However, these systems have failed at a higher than normal rate, requiring revision surgery or surgeries and causing other problems, such as irritation at the implantation site. Another problem has been the heavy metal shavings that can lead to bleeding at the implant site or leech into the patient’s bloodstream. This condition is called “metallosis.”
Metal-on-metal hip replacement systems use cobalt and chromium, both of which can cause various health issues and have been linked in medical research to depression and symptoms of dementia.
The U.S. Food and Drug Administration has ordered metal-on-metal hip replacement system manufacturers to submit premarket approval applications, which allows FDA officials to review the design, testing and production of the systems before they are available for use.
DePuy hip replacement lawsuit.
According to court documents, DePuy Orthopaedics had design, testing and production flaws with some of its metal-on-metal hip replacement systems. Juries have awarded hundreds of millions of dollars in damages to patients whose systems failed
The FDA premarket approval application will require manufacturers to address any risks known, or that should reasonably be known; the effectiveness of the device; full reports from investigations on the safety and effectiveness of the device.
Regarding metal-on-metal hip replacement systems, FDA has also taken steps to:
• evaluate such devices using magnetic resonance imaging (MRI);
• support new technologies to improve imaging around metal implants to better locate problems before they become serious;
• encourage metal ion testing procedures to ensure consistent practices and reporting;
• review literature regarding devices and results in the United States and around the world;
• review reports involving failed devices to determine why and how the device failed;
• direct manufacturers to conduct a postmarket surveillance study to gather “additional information about the safety profiles of the implants, including the effect of metal ion concentrations in the bloodstream”;
• organize orthopaedic registries around the world to more consistently report and catalogue issues with the devices; and
• provide safety information to patients and health care providers.
That’s not all!
In 2005, J&J pushed their DePuy ASR Hip implants in the United States as a new design that would last 20 years and would provide a greater range of motion. The DePuy ASR metal on metal hip implant design has a metal femur head that rotates within a metal cup, known as a metal on metal design. According to the FDA metal on metal (MoM) Hip Implant Systems consist of a metal ball, metal stem and a metal shell. These metal on metal hip implants were designed to have less device wear, decreased chance of dislocation, and decreased chance of fracture.
However, the metal ball and the metal cup slide against each other during movement causing metal particles to be released. Over time, the metal particles can cause damage to bone and/or tissue surrounding the implant and joint. Soft tissue damage may lead to pain, implant loosening, implant failure, and/or revision surgery. –authored by Rick Fahr