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Factors affecting range of motion following two-stage revision arthroplasty for chronic periprosthetic knee infection
Doo-Yeol Kim1, Young-Chae Seo2, Chang-Wan Kim2
1Department of Orthopedic Surgery, Good Samsun Hospital, 356, Gaya-daero, Sasang-gu, Busan, 47392, Republic of Korea.
Introduction:
The purpose of this study was to evaluate factors that affect range of motion (ROM) following two-stage revision arthroplasty as a treatment for chronic periprosthetic knee infection.
Materials And Methods:
A total of 98 patients diagnosed with chronic periprosthetic joint infection (PJI) following primary total knee arthroplasty between January 2009 and December 2019 and then underwent two-stage revision arthroplasty were reviewed retrospectively. Multiple regression analysis was performed to evaluate the factors that affect ROM after two-stage revision arthroplasty. ROM after two-stage revision arthroplasty was used as a dependent variable, while age at the time of surgery, ROM at PJI diagnosis, ROM after the first-stage surgery, the interval between the first-stage surgery and the second-stage surgery, whether a re-operation was performed before the second-stage surgery, culture results (culture negative or culture positive), and body mass index (BMI) were used as independent variables.
Results:
Multiple regression analysis (R2 = 0.843) revealed that among the independent variables, ROM (β = 0.604, P < 0.001) after the first-stage surgery, whether a re-operation was performed before the second-stage surgery (β = - 8.847, P < 0.001), the interval between the first-stage surgery and the second-stage surgery (β = - 0.778, P = 0.003), and BMI (β = - 0.698, P = 0.041) were associated with ROM after two-stage revision arthroplasty, the dependent variable.
Conclusions:
In two-stage revision arthroplasty for chronic periprosthetic knee infection, ROM after the first-stage surgery, whether a re-operation was performed before the second-stage surgery, the interval between the first-stage surgery and the second-stage surgery, and BMI were found to be factors that were associated with ROM after two-stage revision arthroplasty.
