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Total knee arthroplasty has been adopted to be the most successful treatment for advanced knee osteoarthritis. The adoption of multimodal periarticular analgesic (MPI) has been shown to have satisfactory pain control after surgery. However, there is relatively lack of data investigating whether this mode of pain control is effective in enhancing rehabilitation.Method:   This is a prospective randomized control trial from July 2017 to June 2018, including 82 patients, in which 43 of them had MPI injection and 39 of them had no MPI injection. Primary outcome measures included the number of days required to perform straight leg raise, length of hospital stay, and Insall knee score upon discharge. Secondary outcome measures included total dose of patient-controlled analgesia (PCA) consumption postoperatively and visual analog scale (VAS) at rest and on motion during postoperative days 1–4.Result:   The MPI group performed significantly better than the femoral nerve block (FNB) group in terms of early functional outcome, namely the number of days required to perform straight leg raising and length of hospital stay. The total postoperative PCA consumption and VAS score on motion during postoperative day 1 were also significantly better for MPI group. There was no difference in Insall knee score upon discharge between these two groups.Conclusion:   Compared to FNB, MPI depicts a faster inpatient rehabilitation, accounted by its quadriceps-sparing, and better pain relief especially in the early postoperative period.

journal of orthopaedics, trauma and rehabilitation

Effect of periarticular multimodal injection versus femoral nerve block on in-hospital rehabilitation after total knee arthroplasty in Chinese population: A prospective randomized control trial study