• J Clin Anesth · Feb 2021

    Review

    Motor-sparing nerve blocks for total knee replacement: A scoping review.

    • Sebastián Layera, Julián Aliste, Daniela Bravo, Mohammed Saadawi, Francis V Salinas, and TranDe QQSt. Mary's Hospital, Department of Anesthesiology, McGill University, 3830 Ave Lacombe, Montreal, Quebec H3T-1M5, Canada..
    • Hospital Clínico Universidad de Chile, Department of Anesthesiology and Perioperative Medicine, University of Chile, Office B222 2nd Floor, Sector B, 999 Santos Dumont, Independencia, Santiago 8380456, Chile. Electronic address: sebastianlayera@uchile.cl.
    • J Clin Anesth. 2021 Feb 1; 68: 110076.

    Study ObjectiveThis scoping review investigates the optimal combination of motor-sparing analgesic interventions for patients undergoing total knee replacement (TKR).DesignScoping review.InterventionMEDLINE, EMBASE and CINAHL databases were searched (inception-last week of May 2020). Only trials including motor-sparing interventions were included. Randomized controlled trials lacking prospective registration and blinded assessment were excluded.Main ResultsThe cumulative evidence suggests that femoral triangle blocks outperform placebo and periarticular infiltration. When combined with the latter, femoral triangle blocks are associated with improved pain control, higher patient satisfaction and decreased opioid consumption. Continuous femoral triangle blocks provide superior postoperative analgesia compared with their single-injection counterparts. However, these benefits seem less pronounced when perineural adjuvants are used. Combined femoral triangle-obturator blocks result in improved analgesia and swifter discharge compared with femoral triangle blocks alone.ConclusionsThe optimal analgesic strategy for TKR may include a combination of different analgesic modalities (periarticular infiltration, femoral triangle blocks, obturator nerve block). Future trials are required to investigate the incremental benefits provided by local anesthetic infiltration between the popliteal artery and the capsule of the knee (IPACK), popliteal plexus block and genicular nerve block.Copyright © 2020 Elsevier Inc. All rights reserved.

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