Metallosis May Result from Faulty Hip Implants

Posted on Apr 16 2012 at 03:32:25 PM in Medicine

 After information was out saying that the Johnson and Johnson hip devices have defects in one out of eight clients, the ASR XL Acetabular System and the ASR Hip Resurfacing System were withdrawn.  A good news for the makers of metal-on-metal hip products was recently reported. Researchers from US and Germany have discovered a stratum of “graphitic carbon” on the head part of all-metal hip implants, new research presents. In April 2012, the U.K. Medicines and Healthcare Products Regulatory Agency (MHRA) released a DePuy and Stryker hip replacement warning on news of high failure rates.

Microscopic metal parts transported into the circulatory system of the body may had been due to metal components rubbing against each other; this must be one effect of suspected design problems with DePuy metal-on-metal hip implant devices.

The following are the symptoms of cobalt poisoning are:
Gastrointestinal problems
Optic nerve / vision problems
Kidney failure
Thyroid problems
Other problems resulting from faulty DePuy hip replacement surgery are:

•         Hip dislocation and unexplained hip pain
•         Swelling
•         Complete hip failure
•         Pseudotumors
•         Tissue damages
•         Additional hip replacement or revision surgery
•         Loosening of hip device
•         Detachment of the hip device from the bone
•         Genotoxicity (genetic damage)
•         Bone fractures
•         Bone loss
•         Inflammatory reactions
•         Presence of chromium and cobalt in the blood that may lead to cancer
“Most major medical centers have seen issues with this device,” Dr. Joshua J. Jacobs, the chairman of orthopedic surgery at Rush University Medical Center in Chicago, says in a newspaper interview. “This does not come as a surprise.”

 “Graphite has been used as a lubricant for over a century. It is a classic lubricant, and it appears to form naturally,” according to Laurence Marks, one of the researchers and also a professor at Northwestern University, teaching materials science and engineering.
Furthermore, for the prevention of metal poisoning and corrosion, he suggests that makers of metal-on-metal hip implants could consider about the graphite formation on the devices.  The benefits of graphite compound was discovered in a recent study funded by the National Institutes of Health that was published in the medical journal, Science.
 “Now that we have a handle on how they are working and why they were working well, we can start to design them to make them better,” Marks further explains.
 The Food and Drug Administration (FDA) have taken notice of about 400 negative feedbacks from DePuy clients between 2008 and the time of its recall announcement. Many of these clients need a second hip replacement surgery. Presently, numerous clients have pursued legal complaints against DePuy Orthopaedics Inc. and its mother company, Johnson & Johnson.These complaints assert that the company postponed the execution of DePuy hip recall even if it knew the risks of using the implants.  DePuy should circulate a wide range of information regarding malfunctioning hip replacement symptoms so that its patrons would be provided with due medical attention. Visit this site for more info.


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  Article Information
Author: Wills
Created: Apr 16 2012 at 03:32:25 PM
Updated: Apr 16 2012 at 03:32:25 PM
Category: Medicine
Language: English