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AIM: To evaluate 90-day episode-of-care (EOC) costs associated with robotic-arm assisted total knee arthroplasty (rTKA) versus manual TKA (mTKA). PATIENTS & METHODS: TKA procedures were identified in Medicare 100% data. Accounting for baseline differences, propensity score matching was performed 1: 5. 90-day EOC and index costs, lengths-of-stay, discharge disposition and readmission rates were assessed. RESULTS: A total of 519 rTKA and 2595 mTKA were included. Overall 90-day EOC costs were US2391 less for rTKA (p < 0. 0001). Over 90% of patients in both cohorts utilized post-acute services, with rTKA accruing fewer costs than mTKA. Post-acute savings can be attributed to discharge destination. CONCLUSION: rTKA incurred an overall lower 90-day EOC cost versus mTKA. Savings were driven by fewer readmissions and an economically beneficial discharge destinations.
Cool et al. (Mon,) studied this question.