Periarticular infiltration demonstrated better analgesia and opioid-sparing effect vs FNB in ACLR .
Periarticular Injection Versus Femoral Nerve Block for Pain Relief After Anterior Cruciate Ligament Reconstruction: A Randomized Controlled Trial
Arthroscopy. 2018 Jan;34(1):182-188129 patients scheduled for arthroscopic anterior cruciate ligament reconstruction were randomized to receive postoperative analgesia including either periarticular infiltration analgesia (PAI) or a femoral nerve block. Patients were assessed primarily for analgesic outcomes, including pain scores and patient-controlled fentanyl consumption. At all time points up to 2 days postoperatively, pain scores were significantly lower in the PAI group compared to the FNB group; pain scores from 3 to 14 days after surgery did not significantly differ between groups. Total PCA fentanyl consumption over the first 24 hours after surgery was also significantly lower in the PAI group compared to the FNB group.
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