“ASR” type Chromium and Cobalt Poisoning also being seen in Pinnacle Hip Implant Recipients

The DePuy ASRmetal-on-metal hip implant has repeatedly made the news following a voluntary recall on August 26, 2010. While DePuy’s Pinnacle metal hip implant has not suffered under the recall stigma, many feel that it offers the same risks to implant recipients as the ASR. And, in fact, many attorneys are constantly asked by their clients about the differences between the ASR and the Pinnacle. The primary distinction between the two metal hip devices lies in the fact that the Pinnacle uses an insert liner between the acetabular cup and the femoral head while the ASR does not. It has been theorized that the ASR cup was too shallow for the head, leading to the ball hitting the edge of the cup and metal shavings to shear off into the body, also know as edge-loading.

While the Pinnacle’s cup was designed to give greater depth and allow the femoral head to move more freely within the socket, in some cases it still has been know to cause metallosis in implant recipients when the cobalt and chromium ions migrate around the body. Metal poisoning can cause a wide variety of adverse medical events. Many ASR recipients have had cardiovascular, renal, neurological and thyroid issues although studies done in the 70’s do not definitively tie these metals to cancer. Unfortunately, due to the lack of comprehensive studies on safe levels of cobalt and chromium in the body and the effects of toxic levels, nobody really knows just how dangerous these metals can be should they migrate to the bloodstream. The metal shards can also lodge into the surrounding tissues causing degeneration and destruction. 

Is Joining the DePuy ASR Class Action Lawsuit still an Option for Recalled DePuy ASR Hip Implant Recipients With No Pain?

Andrew Sullo, Class Action Lead Counsel & Managing Partner at Sullo & Sullo is working hard to ensure that every single recipient of the DePuy ASR metal-on-metal hip implant is fully aware of both the recall on August 26, 2010 and the upcoming statute of limitations expiration for those who reside in states which implement the two-year statute. There are over 40,000 people who have received an ASR implant in the United States. The ASR was approved by theFDA in 2005 and began being widely used by surgeons who believed the metal-on-metal design would last much longer than the metal-on-ceramic or metal-on-polyethylene models.

Unfortunately, adverse health reports began pouring in with over 17,000 such reports received by the FDA regarding these all metal hip implants. Of those thousands of recipients, there are only approximately 6,000 who have joined into the MDL lawsuits against DePuy. While this might cause some to wonder if the risks of the ASR have been exaggerated, there are other factors involved. First of all, many recipients may not have heard the device was recalled or may truly have no idea what type of implant was used in their surgery. Second, many recipients of the ASR and other hip implant devices are senior citizens who may believe the symptoms they are experiencing are related to advancing age rather than attributing them to the ASR implant.

Finally, many of those who have not come forward to take part in the lawsuits state they are not having any problems with the ASR at present, so why would they sue the company? This is very flawed logic in this particular instance. Although the failure rate of the ASR was originally stated by DePuy to be in the 12-13% range—still much higher than the average of .5-5% failure rates—experts in the field have estimated that by six years following the initial surgery nearly 50% of the ASR hip implants will have failed and by eight years following the surgery a staggering 80% will have failed. When you look at those numbers you can see that it is highly likely that at least half of those thousands of people who have not joined into the lawsuit will suffer a hip failure. In fact, Andrew Sullo notes that “More than 50% of our ASR hip recipient docket has already received revisions.”

Problems with the DePuy Pinnacle Hip Implant: Current Reports

As of this date the Pinnacle metal-on-metal hip implant device manufactured by DePuy has not followed in the recall footsteps of DePuy’s other hip implant, the ASR. While Johnson and Johnson and DePuy vigorously deny that the Pinnacle has any problems—and, in fact, call it the best metal-on-metal hip implant on the market today—many recipients of the device feel it has some of the same flaws as the ASR. Both the Pinnacle and the ASR are manufactured by Johnson and Johnson’s subsidiary company, DePuy. The Pinnacle made its debut in 2002 as the predecessor of the ASR which followed in 2005. The ASR is strictly a metal-on-metal hip implant device while the Pinnacle name includes metal-on-ceramic and metal on polyethylene models as well.

Nearly 150,000 Pinnacle all-metal hip replacements have been implanted compared to 93,000 ASR’s worldwide—approximately half of those in the United States alone. Both the Pinnacle and the ASR all-metal hip implants were approved under the controversial 510(k) FDA approval process. This particular process allows the majority of medical devices to get to market quickly by showing they are substantially comparable to a device which has already gained approval. The process also allows a product to get to market without expensive clinical trials however in some cases the approval process has been predicated on a device which is no longer marketed—even due to poor performance.

Chromium and Cobalt Poisoning: What are the Long Term Side Effects of Metallosis?

It is likely that the recipients of a metal-on-metal hip implant have heard about the possible consequences from the metal shavings which can be released into the body when the metal cup and ball rub against one another during normal activities. Tiny ions of cobalt and chromium shear off when the two surfaces meet and those ions can lodge in the surrounding tissues or can end up in the bloodstream. As more and more metal hip implant patients are realizing the seriousness of metal toxicity, blood testing for elevated levels of metals is increasing. In many cases patients have been found to have levels of cobalt and chromium in their bloodstream which are as much as a hundred times normal levels. 

Although slightly elevated levels of these metals are fairly normal for patients with metal-on-metal hip implants, extreme elevations can be very dangerous—and anxiety-producing for the patient. DePuy released a report indicating that concentrations of the metals greater than 7 parts per billion are cause for concern. The Mayo Clinic has set somewhat different reference values, stating that blood serum concentrations of chromium greater than 1ng/mL suggests significant wear of the metal implant while serum concentrations greater than 5.0 ng/mL of cobalt can be considered toxic and also suggest significant wear of the prosthesis. Remember that 1 PPB (part per billion) equals 1.0 ng/mL.

Johnson & Johnson Hip Implant Settlement: Filing Deadlines are Approaching Fast

Many recipients of the ASR metal-on-metal hip implant are unaware of a crucial date which is fast approaching. The ASR was approved by the FDA in 2005 then labored under a flurry of adverse reports regarding early failure rates. Finally, on August 26, 2010, DePuy recalled the ASR, citing failure rates of around 12-13%--as opposed to their initial reports of 4-5% failure rates. What this means is that among the 26 states which operate under the two year statute of limitations, there is less than a month left to join in the multi-district lawsuits against DePuy. Of the more than 40,000 recipients of the ASR in the U.S. alone, only about 6,000 of those have joined in as plaintiffs in the DePuy suit. This means there are over 35,000 ASR recipients out there who have yet to come forward.

There may be several reasons for this including the fact that many of these people may be unaware of the recall. Others may be elderly recipients of the metal ASR and are simply chalking their negative health symptoms up to the aging process. It is believed, however that a large number of those who have not joined in the lawsuit have not done so because they are not yet experiencing problems, therefore believe they have no rights under the current lawsuit. It’s important that this group of people be aware that the actual failure rate of the ASR has been estimated at 50% at six years and 80% at eight years. Considering the ASR metal-on-metal implant has only been on the market since 2005 you can see that the likelihood of thousands more recipients having serious problems from the device is huge. 

U.S. Drug Watchdog Urges Pinnacle Hip Implant Recipients to Come Forward

Over 130,000 Americans received a DePuy Pinnacle metal-on-metal hip implant between the years of 2005 and 2010. Although its counterpart, the DePuy ASR XL hip replacement system was recalled in 2009, the Pinnacle, while employing the same construction methods and materials, has not been recalled. Because of the recall of the ASR, there is mounting concern that the Pinnacle may also expose recipients to the dangers of metallosis or metal toxicity. The U.S. Drug Watchdog has stated their goal of reaching each and every one of the recipients of the Pinnacle implant to ensure none who have suffered harm are left behind.

Although only about a thousand people have come forward to date, the U.S. Drug Watchdog believes those numbers will grow rapidly, reaching well over 100,000. When the victims are properly identified they will then be provided access to the most knowledgeable attorneys who possess a thorough background in the intricacies of the metal hip implant. The objective of the U.S. Drug Watchdog is to ensure every person who had their health harmed because of a metal-on-metal hip implant receives appropriate compensation for failure of the implant.

Patients With Defective DePuy ASR Hip Implants

By Andrew Sullo

SULLO & SULLO, LLP

HOUSTON — In the wake of DePuy Orthopedics, Inc.’s recall of defective ASR hip implant devices, patients and their physicians have been searching for ways to mediate the potential health risks involved. With complications ranging from dislocation of the implant components and bone fractures at the hip, to metal poisoning, or metallosis, finding an accessible, effective treatment is imperative.

  Enter the Accelerated Recovery Performance Wave (ARPwave) System, a revolutionary method that has been used by professional athletes and weekend warriors alike to treat muscle-related injuries and speed post-surgical rehabilitation for years. The invention of Denis Thompson, an exercise physiologist based in Burnsville, Minnesota, the ARPwave uses a patented bio-electrical current, simultaneously with active range-of-motion and other exercise techniques, to significantly speed up the body's natural recuperative ability.

  The ARPwave is a Class 2 medical device that is FDA authorized for muscle re-education; relaxation of muscle spasms; increased local blood circulation; prevention and retardation of disuse atrophy; and maintaining and increasing range of motion. Protocols can also be specifically used with the ARPwave to accelerate post-surgical muscle rehabilitation of the shoulder, elbow, wrist, hip, knee, ankle, foot, and cervical and lumbar spine. For this reason, the device would be useful to patients experiencing complications related to a defective DePuy hip implant device. Treatment of the affected area could significantly lessen long-term damage to muscles and bone surrounding the faulty implant.

Why DePuy Hip Recall Wont Be a Class Action Lawsuit.

By Independent Staff Writer

In a recent article, we explained the difference between bringing an individual lawsuit against DePuy vs. becoming part of a mass action lawsuit. In this article, we're delving into the differences between mass action and class action.
Historically, class action lawsuits are the stuff that give lawyers a bad name. The senior partner at our firm, Andrew Sullo, likes to say that class action lawyers represent people who don't know they've been harmed and don't care.
He's not just speaking metaphorically. It's entirely possible in a class action lawsuit to represent people who have no idea a lawsuit is being conducted in their name. Statistically, it's likely that you yourself have been involved in a class action lawsuit without ever knowing it.
In the case of the DePuy hip recall, it's extremely unlikely that any judge would allow the case to be brought as a class action. Here's why:

Advantages of a Class Action Lawsuit
When a class action lawsuit is filing, it must name one or several plaintiffs on the behalf of a proposed "class" of people. The "class" of people are individuals or business entities who have suffered a common injury or injuries.

The rules vary by state (in Virginia, for example, there are no class action provisions) but in general the idea is that the group is so large that individual lawsuits are impractical, and the claims are so similar that they can be considered by the judge as a single problem that many people have in common.
Class actions have several advantages. As we noted in our article on the advantage of bringing a mass action lawsuit against DePuy, any lawsuit that involves many people working under a single lawyer or collaboration of law firms has distinct financial advantages, since it will cost far more to bring each case individually than it will to bring a group of cases with similar problems. Another oft-cited advantage of class actions is that there is no advantage to plaintiffs who file early as opposed to plaintiffs who file late, and a third advantage is that class action suits have often been used historically to purposely change the behavior of a group of individuals such as physicians or companies.

Of course, all of these advantages only apply to lawsuits that are brought with the plaintiffs' best interests in mind. Unfortunately for our legal system, class action lawsuits have been used repeatedly to benefit unethical lawyers rather than plaintiffs.

The Missing Money
The biggest problem in class action lawsuits is that the plaintiffs often do not receive a share of the money recouped - or the share they receive is so small as to be negligible. Lawyers often take a large share of the awarded compensation while leaving plaintiffs with coupons of little or no value.
Lawyers are required to inform members of the "class" for whom they are filing suit that those individuals are now a part of a class action lawsuit. In theory, this means the people whose names are being used in the class action lawsuit have an opportunity to opt out of being a part of the lawsuit. In practice, most people either do not read such notices, viewing them as junk mail, or do not understand them.
Even if the notices are read and understood, it is extremely unlikely that the individual can do very much to forestall the class action lawsuit unless that person has significant personal funds. It is possible to sue a lawyer who uses your name without your consent in a class action lawsuit, but it would require significant funds and the lawyer often wins such cases, claiming that he brought a suit in the plaintiffs' best interest and had nothing but good intentions.
Meanwhile, the lawyer pockets much of the settlement. For those willing to spend their careers in such shills, it's a process with great rewards and little risks.

For DePuy plaintiffs - and our legal team - Ohio is the place to be.

By Independent Staff Writer
Two weeks ago, the U.S. Panel on Multidistrict Litigation conducted a hearing to discuss where the DePuy Hip Implant MDL should be placed. Today, the Panel announced that the litigation will take place in the Northern District of Ohio.

Complaints about the DePuy ASR hip implants have been reported throughout the United States, which prompted a hearing to consolidate the cases into multidistrict litigation. Counsel for DePuy Orthopaedics, Inc. did not object to doing so. The Multidistrict Litigation (MDL) Panel determined that the DePuy cases qualified for consolidation and created DePuy Mulitdistrict Litigation.

There were many different courts in the running for the federal district in which the pretrial proceedings would take place, including Kentucky, Indiana, New Jersey, Ohio, and Florida. Counsel for DePuy and several Plaintiffs' lawyers who represent people harmed by the DePuy devices submitted arguments to the Panel as to which court they felt was most appropriate for these cases.

As we've explained in previous articles, consolidating a case conserves resources for the attorneys as well as the judiciary, and bringing individual lawsuits for each case can make the costs so prohibitive as to present an obstacle to getting a fair settlement for the plaintiffs. The fact that DePuy Multidistrict Litigation has been formed creates a more efficient way for our legal team to pursue claims for our clients and ensures we are better able to give them the individual attention they need.

Many patients who received a DePuy hip implant have suffered heavy metal poisoning. But what does that really mean?

By Independent Staff Writer

As we try to describe the reasons the DePuy ASR XL Acetabular System present such a danger to your health, we occasionally use terms you may be only vaguely familiar with. This is an ongoing series of articles on the medical terms related to the DePuy hip recall and hip revision surgeries.

Heavy metal poisoning, by its strictest definition, is simply the build-up of heavy metals in the soft tissues of the body. It is also referred to as heavy metal toxicity. The most common heavy metals associated with poisoning are lead, mercury, arsenic, and cadmium; the ones that are in the structure of the DePuy ASR XL Acetabular hip implant are chromium and cobalt.

One doctor who analyzed several patients who were tested for metal poisoning said that these were some of the highest levels for chromium and cobalt ions he has ever seen. Despite this, he also said that many of the patients had no symptoms, which makes for a very good argument that any patients who received an ASR XL Acetabular System should be monitored closely and receive regular blood tests.

For any kind of heavy metal poisoning, the symptoms largely revolve around the digestive system: nausea, vomiting, diarrhea, and stomach pain, for example. Patients may also have headaches or get a metallic taste in their mouths. In extreme cases, heavy metal poisoning may make patients lose cognitive, motor, and language function.

Too many ASR XL Acetabular Systems causing problems in first three years.

By Independent Staff Writer

In 2003, DePuy released the ASRTM XL Acetabular System, a hip implant that was touted to last up to 20 years with a stronger, more durable metal-on-metal design. Approximately 93,000 people around the world weighed the risks of surgery against their current level of pain and discomfort and chose to receive a hip implant that they believed would give them 15 to 20 years of pain-free movement.

DePuy issued a hip recall earlier this year, which means a disturbing number of those patients will likely have to undergo a hip revision surgery-years ahead of schedule. 

With a typical hip replacement, the patient is able to resume a normal life after three to six months of recovery. There are a number of "common" problems, such as loosening joints, fractures, and occasionally dislocation. Hip implant recipients are informed beforehand that the risk of these types of failure is .5-3%

The admitted failure rate of the ASR XL Acetabular System is 13%-meaning, this is the number acknowledged by DePuy. Mounting evidence suggests that the failure rate is higher than that, especially if one doesn't limit the definition of "failure" to DePuy's narrow view. 

The major flaw, as we've said in other articles about the problems with the XL Acetabular System, is the engineering. The two pieces of the implant rub together as the patient moves, releasing microscopic particles of chromium and cobalt into the bloodstream. Some patients experience pain when this happens; others have no idea of the damage being done to the bone and tissue surrounding the hip implant. Some patients and doctors have reported a loosening of the joints in the hip implant, fracturing of the surrounding bone, and full-out dislocation. 

Every hip implant releases small particles of the device's materials into the bloodstream, but the quantities are so small that the body can release them from the bloodstream as waste. In the ASR XL Acetabular System, the quantities being released are sometimes so great that the body can't get rid of them efficiently, causing metallosis.

Much of the pain and problems behind the DePuy ASR total hip implant were caused by metallosis. But what does that really mean?

By Taylor Lindstrom

Johnson & Johnson has announced that its subsidiary company DePuy issued a voluntarily recall of their ASR hip implant due to a number of patients who required a second hip replacement procedure, called a revision surgery." 

No mention was made of metallosis in the Johnson & Johnson press release. In fact, Johnson & Johnson didn't mention any of the more significant symptoms patients are suffering after receiving a DePuy ASR XL hip implant. They would prefer that the public believed the revision surgery process is simple and fixes the problem of a faulty hip implant with absolutely no long-term effects. 

We're recommending you get a second opinion - and a blood test.

Metal-on-metal hip replacement bearings like the DuPuy ASR XL Acetabular System total hip replacement were originally reintroduced as an alternative to metal-on-plastic or ceramic hip replacement systems. Metal-on-metal implants (for a hip implant, this is a design that involves both a metal ball and a metal socket) have certain advantages over plastic or ceramic when the design is properly engineered. They last longer, have high resistance to wear and tear, and can withstand more vigorous activity, making metal-on-metal the usual choice for surgeons with younger, more active patients who are going to put more strain on their implants.

However, a poorly engineered metal-on-metal hip resurfacing system has considerable complications, many of them more serious than their ceramic or plastic counterparts. 

The Blue Cross Blue Shield Association Technology Evaluation Center report on metal-on-metal total hip resurfacing notes that metal-on-metal systems have risks of elevated heavy metal ion levels, delayed hypersensitivity to metals, and even carcinogenesis - cancer, to the layman.

All hip replacement systems release tiny particles of the implant's material into the body when the two parts of the hip replacement rub against one another. In metal-on-metal implants, a small amount of friction and metallosis is predictable and part of the considered risks when the surgeon recommends a certain type of hip implant. 

However, when the metal parts are improperly made or installed, the friction releases much more metal into the bloodstream, causing serious metallosis and metal poisoning.

Engineers who have examined the DuPuy ASR hip replacement system noted several design flaws that contributed to increased metallosis and metal poisoning in patients. The implant is shallower than most other hip replacement systems, which made it much more challenging to implant than other systems. DePuy was fully aware of this setback; their instructions to the surgeon recommended a much more precise placement than other implants. 

One engineer we consulted with went on to note that the requirements for placement were so specific that only about 3% surgeons would be able to place the hip implant properly. This is not a comment on the surgeon's skill; the engineer was quick to note that the placement demands would be impossible for all but the most skilled and experienced surgeons, and even then the surgeon would have to be fully informed of the importance of precise placement. 

Reviewing the Safety of Metal-on-Metal Hip Implants

By Independent Staff Writer

According to a recent BBC Newsnight investigation, literally hundreds upon thousands of patients across the globe may have been exposed to potentially toxic substances following the implantation of metal-on-metal hip implants. Even though it is now believed that the dangers of these hip devices—which appear to have been very poorly regulated at best—was well known and documented for decades, recipients of the devices were nonetheless kept in the dark. The implants which are in question are known as “metal-on-metal,” and are constructed via a head at the top and a lining the head fits into which are made of cobalt-chromium alloy.

The Failure Rate of Metal-on-Metal Hip Implants
These hip implants are used in hip replacements and hip resurfacing, and came into wide-spread use in the 1997. The target group for these metal-on-metal hip replacements was younger, still-active patients who expected the hip replacement to last the rest of their life. Unfortunately, the numbers show that the failure rates among both genders are significantly higher than normal—from 11.8% failure in resurfacing to 13.6% for the total hip replacement as compared to rates of only between 3 and 5% for implants made of other materials.

How Many People Have Hip Implants?
Since 2003, the BBC article reports that over 60,000 patients in England and Wales and over a million in the United States have received the potentially dangerous metal-on-metal hip replacement. The metal ions from the cobalt and chromium hip implants are believed to seep into local tissues causing reactions which can not only destroy muscle and bone but can eventually leave the victim with a permanent disability. The fact that cobalt and chromium can lead to such serious health issues was actually documented in scientific journals over three decades ago.

Was There a Cover-up?
DePuy, a major manufacturer of the metal-on-metal hip implant, released an internal memo in 2005 which stated that in addition to possible changes in immune functioning there was additional concern that the metal debris from the device could be carcinogenic. The memo went on to state that the possibility of distant effects of the device was “worrying,” and that one study indicated a three times higher risk of lymphoma and leukemia ten years following the hip replacement. Despite these very real concerns DePuy continued marketing the device and indicated none of the potential health concerns in their subsequent promotional materials.

A Discussion of the Long-Term Health Effects of the Hip Implant
In 2006 the Medicines and Healthcare Products Regulatory Agency convened a meeting to discuss the long-term health effects of the metal-on-metal hip implant made from cobalt and chromium. An advisory board was appointed, however out of the group’s eight members, two were consultants for DePuy and one was the director of product development for Smith and Nephew—obvious conflicts of interest. In the end the group chose to sidestep the potential dangers of the metal-on-metal hip implants, even refusing to warn women of child-bearing age of the potential dangers despite the fact that metal ions had previously been detected in umbilical cord and placental blood among women with the implant. No alert was put out to either surgeons or patients, and it was not until March of 2011 that the British Orthopedic Association sent out a warning advising that the metal-on-metal hip replacements should be “carefully considered and possibly avoided.”

Defective DePuy ASR Hip Implants Should Consider The ARP Wave

Patients With Defective DePuy ASR Hip Implants Should Consider The ARP Wave

By Andre Sullo

SULLO & SULLO, LLP

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HOUSTON — In the wake of DePuy Orthopedics, Inc.’s recall of defective ASR hip implant devices, patients and their physicians have been searching for ways to mediate the potential health risks involved. With complications ranging from dislocation of the implant components and bone fractures at the hip, to metal poisoning, or metallosis, finding an accessible, effective treatment is imperative.

Enter the Accelerated Recovery Performance Wave (ARPwave) System, a revolutionary method that has been used by professional athletes and weekend warriors alike to treat muscle-related injuries and speed post-surgical rehabilitation for years. The invention of Denis Thompson, an exercise physiologist based in Burnsville, Minnesota, the ARPwave uses a patented bio-electrical current, simultaneously with active range-of-motion and other exercise techniques, to significantly speed up the body’s natural recuperative ability.

The ARPwave is a Class 2 medical device that is FDA authorized for muscle re-education; relaxation of muscle spasms; increased local blood circulation; prevention and retardation of disuse atrophy; and maintaining and increasing range of motion. Protocols can also be specifically used with the ARPwave to accelerate post-surgical muscle rehabilitation of the shoulder, elbow, wrist, hip, knee, ankle, foot, and cervical and lumbar spine. For this reason, the device would be useful to patients experiencing complications related to a defective DePuy hip implant device. Treatment of the affected area could significantly lessen long-term damage to muscles and bone surrounding the faulty implant.

To use the ARPwave, a valid prescription is required. The devices are licensed only to medical practitioners and select athletes for personal use. Treatment is not currently covered by most insurance plans, and individual sessions cost about $100. The number of sessions required depends on the severity of the damage to the muscles being treated.

A typical ARPwave session requires the patient to move, so wearing loose, comfortable clothing is recommended. Because the device is used to find the origin of the injury, the physician providing treatment moves electrodes around the affected area to search for “hot spots”. 

These are areas of electrical disturbance in the muscle tissue that represent the root of the injury. Sessions can be intense and physically demanding, so it is recommended during the course of treatment that patients take measures to ensure their bodies recover properly. Typically, this means getting a good night’s sleep, eating healthy meals with adequate protein, avoiding/limiting alcohol consumption, etc.

If you or someone you know received a defective DePuy ASR hip implant, you should also obtain the counsel of an experienced personal injury attorney. The skilled team at Sullo & Sullo, LLP will aggressively defend your rights and make sure you get the compensation that you deserve, including coverage of the cost of treatments such as the ARPwave. Call us at 1-800-730-7607 or visit our website at www.sullolaw.com for a free legal consultation today.

DePuy ASR hip replacement recall

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Cobalt and Chromium Blood Toxicity in Hip Replacement Patients Chromium Poisoning and Cobalt Poisoning in the DePuy ASR hip replacement recall 

By Attorney Andrew Sullo
SULLO & SULLO, LLP

 

DECEMBER 15, 2010 - HOUSTON — DePuy hip replacement recall by DePuy Orthopedics, Inc.’s metal-on-metal hip replacement system sent shockwaves through the international medical community. Given the fact that these devices have gained great popularity in recent years among orthopedic surgeons and patients alike, reports that the ASR XL Acetabular System and ASR Hip Resurfacing System were prone to early failure were met with great fear and unease. 

Since the DePuy hip replacement recall, many of the 93,000 people worldwide who received an ASR hip implant have been scrambling to find answers to pressing health-related questions, especially as stories of blood toxicity, metallosis, chromium poisoning, cobalt poisoning, and other metal poisoning issues in patients have reached the public. And while countless studies have confirmed the consequences of metal wear debris from faulty orthopaedics, many people are still left with grave concerns regarding the the DePuy hip replacement recall. 

To date, the most widely researched side effect of DePuy’s defective hip replacement devices is the aforementioned metallosis, which the Journal of Bone & Joint Surgery describes as “aseptic fibrosis, local necrosis or loosening of a device secondary to metallic corrosion and release of wear debris.” Design problems with the recalled DePuy ASR hip replacement system cause the metal components such as chromium and cobalt to rub against each other and shed microscopic metal particles into the body, which can result in soft tissue damage, inflammatory reactions and bone loss. 

Of particular interest are the remarkably high concentrations of cobalt and chromium that have been found in patients with metal-on-metal hip resurfacings. In some cases, patients with recalled hip replacement implants have been found with 100 times the normal levels chromium and cobalt in their bodies. 

The potential adverse effects of systemic cobalt and chromium ion elevation are the subject of ongoing investigation. While their individual implications on the body are somewhat understood, their combined effects are not. Doctors are struggling with patients’ questions because they simply do not have the answers. But based on existing research we do have some insight into the long-term ramifications of blood toxicity, chromium poisoning, cobalt poisoning and metallosis and sadly, it is not promising for DePuy patients.

Research relating to the hip replacement recall – Metallosis, Chromium Poisoning & Cobalt Poisoning

As early as 2003, researchers at the Municipality of Vienna Gersthof Orthopaedic Hospital in Austria found that patients with metal-on-metal total hip replacements had higher cobalt and chromium levels than those in a control group. Their findings, published in the Journal of Orthopaedic Research, showed cobalt concentrations up to 50 times higher and chromium concentrations up to 100 times higher, and called for the careful monitoring of patients to ensure that any local or systemic complications are detected early on.

In 2006, a study published in the British Volume of the Journal of Bone and Joint Surgery found a correlation between metal ions from hip resurfacing and reduced T-cell counts. Researchers discovered that elevated cobalt and chromium levels in patients with metal-on-metal hip resurfacings were associated with statistically significant decreases in the level of CD8+ cells (T-cytotoxic/suppressor cells).

In the same publication in 2007, a review by researchers from University of Bristol in Bristol, UK, demonstrated the long-term effects of metal-on-metal arthroplasty. The team compiled data describing the release, dissemination, uptake, biological activity and potential toxicity of chromium and cobalt debrispotential harmful effects on immunity, reproduction, kidney function, development, the nervous system and carcinogenisis. released from alloys currently used in modern orhopaedics, which included a list of

 

Doctors from ANCA Medical Center in Ghent, Belgium, released a study in 2008 showing a direct correlation between inclination of the acetabular component and metal ion levels in hip implant patients. Their research found that there were significantly higher levels of metal ions in patients with steeply-inclined components, and that high concentrations of chromium and cobalt are toxic; are known to interfere with a number of biological functions; can result in fluid or mass formation with subsequent destruction of soft tissues; and can result in bone resorption leading to loosening of he implant or fracture of the femoral neck.

Finally, hip replacement patients with metal-on-metal implants have been shown to pass chromium and cobalt ions to their infants during pregnancy, according to research presented at the 2010 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS). Data showed that there is a correlation between whole blood metal ion levels in the mother and her infant at the time of delivery, which proves that the placenta is not a complete barrier to the transport of these harmful substances. 

The known risks of failure of DePuy ASR hip implants are clear, and evidence of their dangerous, long-term health consequences is substantial. All patients should consult their physicians about regular monitoring in order to detect potential problems before it is too late. If you or someone you know received a defective DePuy ASR hip implant, you should also obtain the counsel of an experienced personal injury attorney. The DePuy hip is part of one of the biggest hip replacement recalls in history. The skilled team at Sullo & Sullo, LLP will aggressively defend your rights and make sure you get the compensation that you deserve. Call us at 1-800-730-7607 for a free legal consultation today.