The investigators will compare the effectiveness of the interspace between the popliteal artery and posterior capsule of the knee (IPACK) block with adductor canal block versus adductor canal block alone for postoperative analgesia in total knee arthroplasty with consequently improved early ambulation and functional rehabilitation.
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The time interval between injection of the block and the first rescue analgesia dose given
Timeframe: 24 hours from block injection