6.29 days) and paid more for their medical care (each five-unit increase beyond 30 kg/m2 cost an additional $250-$300 in primary knee arthroplasty hospitalization and $600-$650 in revision procedure hospitalization). Those with higher BMIs remained hospitalized for a day longer than their slimmer counterparts (7.77 days vs. The studies found the length of hospital stay and direct medical costs to be lowest among patients with a body mass index (BMI) of 25-30 kg/m2. Two studies that show obesity alone may not diminish outcomes or increase the risk of complications in TKR recipients, though these patients could face longer hospital stays and related costs. Though the gender-specific knee research was one of the more noteworthy studies presented at this year’s AAOS meeting, more than a dozen clinical research analyses were discussed during the five-day event, including: However, the additional size option definitely provides the surgeon with more flexibility during surgery and that is useful.” Benefits of using the gender-specific component may not be detectable by current measures, or may not exist at all. “At the same time, there was no detectable disadvantage of using the implant, such as increased blood loss or component migration. “While we certainly use components frequently, we don’t detect any objective improvement in clinical outcomes, including pain scores and range of motion,” noted lead study author and orthopedic surgeon Alexander P. While female-specific implants had less overhang, the overall range of motion, knee flexion (bending), lateral release rates (kneecap movement) and pain scores were comparable in both the custom knee and unisex joint, according to the study. Clinicians reviewed radiographs of the knee for component fit and outcomes in both groups. The study evaluated 1,957 TKRs between 20 in women 1,515 of those patients received gender-specific knees and 771 were given “unisex” joints. Often lost amid all the new-product hoopla, however, is the clinical research that eventually could lead to future breakthroughs.įor example, one of the studies the academy unveiled in Chicago was how a gender-specific prostheses may not improve overall outcomes for female total knee replacement (TKR) patients. In years past, the event has been used as a launching pad for thousands of innovations. Over the course of the last eight decades, the AAOS annual meeting has become revered for its showcase of new products and technology. The following are a few examples of the diverse products and findings highlighted during AAOS. It was a robust year for clinical data and new technology across the orthopedic sector’s numerous categories as organizations used the annual gathering to showcase their latest offerings. and Smith & Nephew plc may have made the most noise at this year’s American Academy of Orthopaedic Surgeons (AAOS) annual meeting in Chicago, Ill., (see the “Take a Knee” feature on page 54), but new product rollouts and research findings certainly weren’t limited to just those companies. The new knee offerings from DePuy Synthes, Zimmer Holdings Inc.
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