- 作者：Yoshinori Ishii ; Hideo Noguchi ; Mitsuhiro Takeda ; Junko Sato ; Shin-Ichi Toyabe
- 关键词：Bilateral osteoarthritis ; Staged TKA ; Interval between the first and second operations ; Simultaneous TKA ; Retrospective study
- 刊名：The Knee
- 出版年：January, 2014
- 年：2014
- 卷：21
- 期：1
- 页码：221-223
- 全文大小：185 K
Background
The purpose of this study was to evaluate the interval between the first and second operations for staged total knee arthroplasties (TKAs) in patients with bilateral knee osteoarthritis. Depending on satisfactory preoperative health status, the patients determined the timing of the second operation. We also analysed correlations between the interval and patient characteristics.Methods
Eighty-six patients with bilateral knee osteoarthritis were analysed. The mean follow-up time from the first TKA was 96 months. The side of the first TKA was chosen by the patients. The timing of the second TKA was determined by the patients, depending on their perceived ability to tolerate the additional pain and limitations to activities of daily living.
Results
The median interval between the first and second operations was 12.5 months, with a range of 2 to 113 months. In 43 (50%) patients, the interval was < 12 months. There was no difference in the interval between females and males (p = 0.861), and no correlation between the interval and body mass index or age. There was weak correlation between the year of the first TKA and the interval (R = 鈭?#xA0;0.251, p = 0.020), with the interval getting significantly shorter as the years progressed (p = 0.032).
Conclusions
The median interval between the first and second operations in patients who underwent staged TKAs for bilateral knee osteoarthritis was about 1 year. The results of the current study may help patients and physicians to plan effective treatment strategies for staged TKAs.
Levels of evidence
Level II.