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JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
Combined femoral and sciatic nerve block vs combined femoral and periarticular infiltration in total knee arthroplasty: a randomized controlled trial.
Journal of Arthroplasty 2012 December
This study tests the null hypothesis that there is no difference between sciatic nerve block (SNB) and periarticular anesthetic infiltration (PI) as adjuncts to femoral nerve blockade (FNB) in total knee arthroplasty in terms of postoperative opioid requirements. Fifty-two patients undergoing total knee arthroplasty were randomized to receive either (a) combined FNB-SNB or (b) combined FNB-PI. Average morphine consumption in the first 24 (20 vs 23 mg) and 48 hours (26 vs 33 mg) showed no significant difference. Visual Analogue Scale scores, knee flexion (60° vs 67.5°) and extension lag (0° vs 5°) were comparable. Anesthetic time, surgical time, and length of hospital stay (5.5 vs 6 days) were similar. This study showed no significant difference between the 2 groups. The PI offers a practical and potentially safer alternative to SNB.
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