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Certain angle ratios of metal-on-metal hip replacements related to high levels of metal ions in the blood

Posted in DePuy Hip Replacement, Stryker Hip Replacement

Many factors affect the blood metal ion levels of patients after metal-on-metal hip arthroplasty.  While certain ions have found to cause a range of adverse events, others, such as chromium and cobalt have been found to be carcinogenic.  A current study by AlisterJ. Hart et al. focused on the main surgically-adjustable variable, the amount of coverage of the head of the new leg bone provided by the cup (the new, synthetic hip bone), a function of inclination and version angles.  The authors state that “most studies have used plain radiographs which have questionable precision and accuracy…these studies do not simultaneously assess version and inclination.”  This indicates that further research must be done to understand the relationship between version and blood metal ion levels.

The study showed that there was a correlation between version and inclination to blood metal levels specifically identifying chromium and cobalt, which both are known to be dangerous cancer causing ions.  They concluded that insufficient cup version can be a cause of high blood metal ions after metal-on-metal hip arthroplasty.

Metal-on-metal hip arthroplasty lawsuits can be filed with our metal-on-metal hip lawyers if you are a victim of the adverse effects of inaccurate version or inclination determination for a metal-on-metal hip arthroplasty.  If you have suffered from the effects of high blood metal ion levels due to metal-on-metal hip arthroplasty, please contact us today to give you the justice deserved.

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