Obesity linked to higher rate of knee replacement revisions

 

Obesity linked to higher rate of knee replacement revisions



Australians undergoing a knee replacement operation are at a higher risk of needing further surgery if they're obese.

Researchers from The University of Queensland Rural Clinical School (UQRCS) examined the association between obesity and unsuccessful knee replacements requiring a revision operation in six years of data from the Australian Orthopedic Association National Joint Replacement Registry.

Lead investigator and orthopedic surgeon, UQRCS's Dr. Chris Wall, said the most common reasons for revision surgery were infection, implant loosening, instability, and pain.

"We found that obese patients had a higher rate of revision surgery overall, and a higher rate of revision for infection specifically, when compared to non-obese patients," Dr. Wall said.

"Morbidly obese patients also had a higher rate of revision for implant loosening."

Thirty-one percent of Australian adults are obese which is a recognized risk factor for the development of knee osteoarthritis and the subsequent need for knee replacement surgery.

UQRCS Head of Research Associate Professor Srinivas Kondalsamy Chennakesavan said a previous study by the research team showed that 58 percent of patients who underwent a knee replacement in Australia were obese.

The paper is published in the Journal of Bone and Joint Surgery.


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