The American journal of orthopedics
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Simultaneous bilateral total knee arthroplasty (BTKA) is often performed to treat patients with disabling arthritis of both knees. Its use compared with staged procedures remains controversial. In a retrospective study, we compared 371 patients who had simultaneous BTKA with 67 patients who had staged (<6 months apart) BTKA. ⋯ Overall, there was no significant difference in complication rates between the 2 cohorts (P = .97). Mean transfusion rate was higher for the simultaneous BTKA group (P = .042). Study limitations included the retrospective design and the relatively small sample, given the low incidence of complications.