ANALGESIC EFFICACY OF ADDUCTOR CANAL BLOCK COMBINED WITH GENICULAR NERVE BLOCK AFTER TOTAL KNEE ARTHROPLASTY: A PRELIMINARY CASE SERIES
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Abstract
To evaluate the preliminary efficacy, opioid-sparing effect, and safety of ultrasound-guided adductor canal block (ACB) combined with genicular nerve block in total knee arthroplasty (TKA). A prospective case series of 21 primary TKA patients receiving preoperative 4-branch genicular block and postoperative single-injection ACB. Resting VAS (0–48h), cumulative 48-hour fentanyl consumption, complications, and satisfaction were recorded. Patients (95.2% female, mean age 66.1 ± 6.3) showed maximum pain relief at 6h (VAS 0.81 ± 0.60), followed by a rebound at 24h (3.24 ± 0.83; $p < 0.001$) which stabilized through 48h (3.14 ± 0.79). Mean 48-hour fentanyl consumption was 121 ± 34.6 mcg. No procedural complications occurred, and 95.2% of patients were satisfied/very satisfied. Combined ACB and genicular nerve block provides safe, effective early post-TKA analgesia (6–12h) and reduces opioid requirements. Proactive multimodal systemic analgesia is required to manage rebound pain at 12–24 hours.
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References
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