Abstract
Purpose
The demand for simultaneous bilateral total knee arthroplasty (SiBTKA) in older adults is expected to increase with an aging population, thus necessitating evaluating its efficacy and safety. However, there is limited information regarding the clinical outcomes of SiBTKA in older adults, particularly in octogenarians. We aimed to assess the clinical outcomes and safety of SiBTKA in Japanese patients aged ≥ 80 years.
Methods
Of the 176 consecutive knees that underwent SiBTKA between July 2016 and January 2022 at our hospital, 172 were selected. They were divided into two groups according to the patient age as follows: the octogenarian group (≥ 80 years, 74 knees) and the younger control group (< 80 years, 98 knees). In addition, we assessed their preoperative clinical information, clinical outcomes using the Knee Society Score for knee (KSS-K) and function (KSS-F), and the incidence of early (≤ 90 days) and late (> 90 days) postoperative complications.
Results
The mean follow-up period was 3.5 years. The KSS-K scores of both groups improved postoperatively than that preoperatively. Both preoperative and postoperative KSS-F scores were lower in the octogenarians; however, their improvement rates were similar to those of the younger controls. We observed no significant intergroup differences in early or late postoperative complications, including infection, systemic complications, periprosthetic fractures, aseptic loosening, and mortality.
Conclusion
SiBTKA for octogenarians had clinical outcomes and postoperative complication incidence similar to that for younger controls. Therefore, SiBTKA may be a safe and effective treatment option for octogenarians with painful bilateral knee deformities.
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Data availability
All data generated or analyzed during this study are included in this published article.
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Acknowledgements
We thank Editage (www.editage.com) for editing a draft of this manuscript.
Funding
This study was supported by a Grant-in-Aid for Translational Research, Tokyo Metropolitan Institute of Gerontology, and a scholarship grant from Teijin Pharma Limited.
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All authors have read and approved the final manuscript. TK, FT, and TM conceived and designed the study. TK, KM, SN, KH, and TM analyzed and interpreted the data. TK and TM wrote the paper. TM supervised all the work.
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All procedures performed in the study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. All the patients provided informed consent. The study was approved by the Medical Research Ethics Committee of our institute (R22-092).
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Kaneko, T., Matsudaira, K., Nakamura, S. et al. Clinical and safety outcomes of simultaneous bilateral total knee arthroplasty for Japanese octogenarian patients: a retrospective analysis. Eur J Orthop Surg Traumatol 34, 155–160 (2024). https://doi.org/10.1007/s00590-023-03634-7
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DOI: https://doi.org/10.1007/s00590-023-03634-7