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New Technology to Track Movement and Durability of Implants in Hip and Knee Replacement Patients
Date:1/19/2012

>, now we have data to determine the success of each patient's implant."  

However, researchers point to a growing concern of failed implants, particularly all-metal artificial hips that need to be replaced prematurely. 

"This groundbreaking RSA technology allows us to identify problematic implants before they fail and develop an individualized course of action for patients depending on the situation," says Dr. Paprosky.  "For example, if a patient complains of pain, we compare a recent RSA scan to the original scan.  If we notice instability, we can intervene, by possibly performing a surgery to stabilize the implant before more complications develop." 

The RSA analysis process is a team effort between the physicians and Halifax Biomedical, a Canadian based biomedical company that developed the stereo radiography technology. Once the beads, or biomarkers, have been inserted by the physicians into the bone surrounding the implant, two or more pairs of stereo x-ray images are taken and sent to Halifax Biomedical.  Technicians use visual assessment software to monitor the position of the biomarkers in relation to the implants. Over the years, if a patient experiences pain, another x-ray of the patient's joint is taken and compared to the original one to determine the relative motion of implants with respect to the bone. A detailed report is then generated showing the stability of the implant.

Other medical facilities in the U.S. and Europe have utilized RSA in clinical trials, but Drs. Sporer and Paprosky are the first in the world to use this monitoring system on all elective joint replacement patients. 

About Midwest Orthopaedics at Rush

Midwest Orthopaedics at Rush is ranked the No. 1 orthopedic program in Illinois and No. 8 in the nation by U.S. News & World Report Rankings. The physicians of MOR are fellowship trained in subspecialty
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SOURCE Midwest Orthopaedics at Rush
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