AAOS Now

Published 1/1/2016

More News from AAHKS

According to a study presented at the annual meeting of the American Association of Hip and Knee Surgeons (AAHKS), obese patients who undergo bariatric surgery prior to total knee arthroplasty (TKA) will experience fewer complications following the surgery than obese patients who have not had bariatric surgery.

Author Brian C. Werner, MD, used a national database to evaluate the complication rates after TKA in patients who have had bariatric surgery. Previous studies that tried to demonstrate a reduction in complication rates failed probably because of low patient numbers. Based on data for 78,036 TKA patients, the authors concluded that patients who are obese are at significantly increased risk of post-surgical complications after TKA; those who underwent bariatric surgery, while still at a higher risk than patients of normal weight, appear to have a lower risk of complications.

Custom cutting guides
Custom cutting guide (CCG) technology used in TKA surgery does not have an advantage over standard instrumentation, according to Denis Nam, MD, MSc, and coauthors. For this study, patients were given the choice of having an MRI prior to surgery and TKA with the CCG technology or TKA with standard instrumentation.

Researchers found "no differences" for range of motion or other functional scores between the group that opted for the CCG technology and the group that opted for traditional instrumentation. Both patient satisfaction and the presences of symptoms following surgery were also similar between the groups.