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Clinical outcomes of revision UKA more comparable to revision TKA than primary TKA
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Functional scores, quality of life, complications and survival rate after revision unicompartmental knee arthroplasty were more comparable to revision total knee arthroplasty than primary total knee arthroplasty, according to results.
Researchers retrospectively reviewed 48 patients who underwent unicompartmental knee arthroplasty (UKA) that were converted to total knee arthroplasty (TKA) and matched them by age, gender, BMI, preoperative Knee Society Score, length of follow-up and date of the index surgery to 48 patients who underwent primary TKA and 48 patients who underwent revision TKA. The mean follow-up for the study was 7 years.
Results showed a mean operative time of approximately 56 minutes for the primary TKA group, 81 minutes for the revision UKA group and 114 minutes for the revision TKA group. Researchers found the primary TKA group also had a mean blood loss of approximately 399 mL compared with 712 mL in the revision UKA group and 951 mL in the revision TKA group. Mean range of motion was significantly higher in the primary TKA group than the revision UKA group, and the revision UKA group had a higher mean range of motion than the revision TKA group, according to results.
Researchers noted a significantly lower mean postoperative Knee Society knee score and function score in the revision UKA group compared with the primary TKA group, but it was similar to the revision TKA group. Outcomes with the KOOS were comparable in the revision UKA and revision TKA groups, according to results, and was similar in the primary TKA group in all but sport activity and activities of daily living subcategories. Compared with the primary TKA group, the revision UKA group experienced a higher overall number of postoperative complications. However, the complication rate was similar between the revision UKA and revision TKA groups. – by Casey Tingle
Disclosures: Lunebourg reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.
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