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Updated: Oct 17, 2025

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Published on: February 14, 2025
Can obese patients undergo simultaneous bilateral total knee arthroplasty without an increased risk of perioperative
Sean K Chan1, Mariya I Opanova2,3, Tyler J Thorne1
1University of Hawai'i, John A Burns School of Medicine, 651 Ilalo Street, Honolulu, HI, 96813, USA.
Abstract:
Simultaneous bilateral total knee arthroplasty (simBTKA) remains controversial, especially in obese patients. Therefore, this retrospective study compared six month perioperative complications in 313 simBTKA patients. Comparison groups included 139 non-obese patients (BMI < 30), 61 obese patients (BMI = 30-35) and 48 severely obese patients (BMI > 35). Increased BMI was associated with longer tourniquet and surgical times (p < 0.001). However, no differences were found for transfusion (p = 0.288), deep infection (p = 0.971), pulmonary embolism (p = 0.454), or deep vein thrombosis (p = 0.670). Increased BMI was, therefore, not associated with greater post-operative complications and should not necessarily contraindicate simBTKA.
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