DePuy Attune® Prosthetic Knee Failure Rate “Unusually High”
SAN DIEGO, Calif., September 9, 2017 — Patients of the DePuy Attune® knee are experiencing complications due to an unusually high rate of “tibial baseplate loosening”. A recent study published in the May 2017 edition of The Journal of Knee Surgery Vol. 30 analyzed knee replacement patients from 3 separate hospitals and discovered that the Attune® prosthetic knee shows “an unusually high rate of early aseptic failures as a result of failure of implant–cement interface”. The loosening of the prosthetic can cause pain, muscle damage, nerve damage and infection that may require revision surgeries to completely cure. Revision surgery, in many cases, is more extensive than the initial operation because of the increased difficulty of the procedure.
DePuy Attune® knee replacement Lawsuit
The Attune® knee is the flagship prosthetic knee device system manufactured and sold by DePuy Synthes, a subsidiary of Johnson&Johnson. This knee system features an innovative newer design that had previously been purported to produce better stability, flexibility and durability. Unfortunately, reports continue to come in from both doctors and patients that the knee replacement device is prematurely failing within only a year or two of the initial implant surgery. Some even report failures within a few months after surgery. The common issue is the loosening of the baseplate bonding that attaches the knee system to the patient’s bone.
The study concludes that the major reason for these unusually high failure rates of the DePuy Attune® knee implant includes “increased constraint of tibial polyethylene, reduced cement pockets in tibia, reduced rotational stabilizers on keel (i.e., all smooth surfaces on tibial fixation surface), and roughness factor on fixed bearing” versus previous knee systems. Surgeons performing revision surgeries also are noticing and reporting similar findings that the device fails to sufficiently adhere to the bone because of the lack of a lasting bond between the patient’s leg bone and the knee implant.
Hip Implant Lawsuit Alleges Stryker Negligence
San Diego, Calif., September 9, 2017 – Stryker, one of the largest and most popularly used hip implant manufacturers, is facing some potentially major product liability legal problems surrounding one of their metal-on-metal hip replacement system. This isn’t the first time, however, that their metal hip implant systems have been pulled from the market for putting patients at risk. In 2012, they recalled two other hip systems—the Stryker Rejuvenate Hip and the Stryker ABG Hip. They quickly became inundated with lawsuits from former patients claiming that the Stryker hip they had implanted had caused serious complications (metal poisoning, dislocations, catastrophic failure, etc.) leading to injury and typically a revision surgery.
Stryker may be back in the hot seat. On August 29, 2016, they issued an urgent warning to medical device implant orthopedic surgeons that hip implant patients were experiencing extremely high failure rates of prosthetics containing their LFIT (Low Friction Ion Treatment) V40 femoral head. Stryker explained that “higher than expected complaints of taper lock failure” has been occurring which could lead to a complete disassociation of the femoral head from the hip stem, excessive metal debris in the hip joint and dangerous metal poisoning in hip replacement patients.
Stryker may now face negligence claims for failing to warn physicians and patients many years earlier when recalling their Rejuvenate and ABG hip implants, which included the LFIT V40. when Many patients have already been injured—some experiencing catastrophic hip implant failure.
Stryker hip replacement lawsuit
Background on the LFIT V40 Femoral Head
Artificial hip implant systems consist of several parts that work together to create the “hip system”. These parts generally include a:
- Femoral head
- Femoral stem
- Femoral neck
- Acetabular socket
The LFIT V40 is the femoral head component used in many of the Stryker hip implants and can be better understood as the part that replaces the “ball” at topmost part of the femur or upper thigh bone. The ball then fits inside the socket of the pelvis bone which makes hip joint rotation possible.
The Stryker LFIT V40 Femoral Heads are used with the following replacement hip implant systems used over the past 17 years:
- Stryker Citation Hip System (January 2000 and later)
- Stryker Meridian Hip System (January 2000 and later)
- Stryker Accolade 1 or Accolade TMZF Hip System (March 2000 and later )
- Stryker Rejuvenate Hip System (December 2008 and later)
- Stryker ABG 2 Hip System (November 2009 and later)
- Stryker Accolade 2 Hip System (March 2012 and later)
Of course, the LFIT V40 Femoral Head was designed to make the replacement hip implant more advanced than their previous models and competitors’ hips. Stryker claimed, in fact, that this design would minimize the risk of dislocation and maximize hip range of motion and stability. They also explained that the “Low Friction Ion Treatment” technology would significantly reduced friction in the hip joint which would provide a longer lifespan for the prosthetic hip. Unfortunately, actual real life case studies proved the opposite: the LFIT technology was actually becoming part of the problem by increasing the metal on metal wear and tear leading to metallosis, tissue damage, pain, swelling, immobility, and catastrophic hip implant failure.
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Knee and Hip lawsuit claims and settlements page updated on September 9, 2017