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metal ions 26 articles

Recent Study Claims Metal Wear from Metal-on-Metal Hip implants Impairs Bone-Forming Cells’ Function

In a recent study, physicians and researchers from Charité-Universitätsmedizin Berlin and DRK Klinikum Westend tested the effects of metal wear from metal-on-metal hip implants looking for changes possibly linked to exposure to excessive metal ions. A Berlin-based team of researchers tested adjacent tissues, joint fluids and bone marrow that had been exposed to cobalt and chromium from the metal-on-metal hip implant. They found that dissolved metals were absorbed into the bone marrow, impairing the cells that are responsible for bone mineralization, a vital process in the forming of bone. Metal-on-metal hip device makers such as  DePuy Orthopaedics, a subsidiary of Johnson & Johnson,  Smith & Nephew, Wright Medical, Zimmer ... Read More

Surgeon: Metal hip implant failures led to ‘severe patient wreckage’

“I’d seen patients coming into the clinic complaining of groin pain. I saw it once and then again and then again and again,” Surgeon Antoni Nargol told Four Corners, an investigative news program for ABC News Australia. Nargol was referring to patients who had received ASR metal-on-metal hip replacement systems made by Johnson & Johnson subsidiary DePuy Orthopaedics. The devices were recalled in 2010 after mounting reports of premature failures and infections caused by heavy metal blood poisoning. New research shows that Johnson & Johnson knew the devices were defectively designed as early as 2006 – four years before the ... Read More

Metal hip manufacturer faces new lawsuits alleging defective design

At least five new lawsuits were filed against Stryker Corp., and its subsidiary Howmedica Osteonics Corp., claiming that the companies’ hip implant was defective, causing injuries and poisoning blood. The lawsuits involve the Accolade TMZF hip stem and LFIT anatomic V40 femoral head. Stryker already is facing more than 500 similar lawsuits over other artificial hip models, the Rejuvenate and ABG II modular-neck stems. According to the complaint, the titanium hip stem can corrode when it is used with the femoral heads, which are made from cobalt and chromium. When the metal corrodes inside the body, it can inflame tissue, ... Read More

Increasing number of people in U.S. getting hip replacement surgery

An estimated 7 million people in the United States – or 2 out of every 100 – have had a total knee or hip replacement, according to a Mayo Clinic study. The research was the first major study to estimate how common joint replacement has become in the United States. Dr. Daniel J. Berry, chairman of orthopedic surgery at the Mayo Clinic and author of the study, reviewed federal databases on surgeries and life expectancy trends and reported those findings this month at the American Academy of Orthopaedic Surgeons conference in New Orleans. Until now, since the United States didn’t ... Read More

Fictional Dr. House character helps solve real-life medical mystery

Doctors were stumped by the symptoms exhibited by the 55-year-old man with severe heart failure. He had fever, swollen lymph nodes, hearing and vision loss when he arrived at the Center for Undiagnosed Diseases in Marburg, Germany. He also had a metal hip implant that replaced a previous ceramic one. The team of German doctors was no stranger to medical mysteries. They use a variety of resources to help pinpoint difficult-to-diagnose conditions. For this case, doctors recalled an episode of the then-recently-ended Fox TV series, House, a show in which the fictional character Dr. Gregory House solves some of the ... Read More

3 medical devices that can harm you

Medical devices are vitally important to the industry. They vary in complexity and application, from tongue depressors and disposable gloves to implants and prostheses. Because they are used to diagnose, prevent or treat disease or other conditions, these items are regulated by the Food and Drug Administration (FDA) to ensure their safety and efficacy. However, this does not guarantee the devices don’t have hidden design flaws that can cause serious health risks. Here are three commonly used medical devices that were designed to help people, but ultimately caused more harm that good: 1. Transvaginal mesh – Also known as vaginal ... Read More

Johnson and Johnson to pay $2.5 billion to resolve thousands of ASR metal hip lawsuits

Johnson & Johnson will pay more than $2.5 billion to resolve more than 7,500 lawsuits involving defective ASR metal-on-metal hip implants made by its subsidiary DePuy Othopaedics. DePuy issued a worldwide recall on an estimated 93,000 of its ASR all-metal hip replacement systems in 2010 after reports that the devices were failing at a faster than expected rate. Traditional hip implants can last 20 years or more before needing to be replaced. However, a large number of DePuy’s ASR devices were failing in five years or less. Unlike traditional hip implants that are made with ceramic or plastic parts, the ... Read More

Corroding metal on artificial hip caused patient neurological symptoms

When orthopedic surgeon Stephen Tower realized in 2006 that in order to continue his recreational cycling he needed hip replacement surgery, he picked the newest and seemingly most durable hip implant on the market at the time – a metal-on-metal device made by DePuy Orthopaedics, a subsidiary of Johnson & Johnson. The hip implant was specifically marketed to younger, active patients like Stephen. However, after a year Stephen was having pain in his hip and balance issues that caused him to crash his bike. Within the next year, he began experiencing more problems – ringing in his ears, sleep apnea, ... Read More

Woman’s pain, itching, migraines traced to defective metal hip implant

For two years, Paula Spurlock suffered from unexplained pain, itching and migraines and no doctor could seem to find the source. It wasn’t until she underwent a PET scan that it was discovered that the all-metal hip replacement system she received in 2008 was corroding inside her body. Further studies showed that the metal-on-metal device was leeching metal ions into her bloodstream, causing a type of blood poisoning known as metallosis and triggering her unpleasant symptoms. Traditional artificial hips are made with ceramic or plastic parts. The newer, all-metal hip implants were designed so that they could last longer and ... Read More

Defective all-metal hip implants can poison blood of recipients

Dean Donovan’s artificial hip seemed to work just fine. The 45-year-old New Zealander had surgery six years ago to treat pain and disability. In recent years he had heard concerns about metal-on-metal hip implants, like his made by Durom. The devices were prone to failing prematurely and in some cases leeching metal ions into the blood. Patients with this type of blood poisoning reported symptoms such as fatigue and headaches. Doctors say the long-term effects are unknown but researchers say the metal debris could damage DNA and lead to serious health problems, including cancer. A few months ago, Donovan received ... Read More