“…Across all studies, 3,4,30–54 a total of 2,317 patients were assessed, of which 5 regional anesthetic strategies were investigated: 613 patients received LIA alone, 30–34,37,41,42,44,45,48,49,51–53,56 939 received LIA with single-injection ACB, 3,31,33,35,36,38–42,44–46,48,49,51–55 585 received LIA with continuous ACB, 3,4,30,32,34–38,40,43,46,51,55 58 received LIA with single-injection ACB and single-injection iPACK, 39,47 and 122 received LIA with continuous ACB and single-injection iPACK. 4,43,54 The primary anesthetic was general anesthesia in 6 studies, 35,39,49,50,53,55 spinal in 20 studies, 4,30–34,36–38,40–48,52,54 and general or spinal in 1 study. 3 Regarding outcome assessment, 25 studies 3,4,30–35,37–41,43–54 assessed early postoperative pain (within 24 h), and 23 studies 3,4,30–35,37–40,42,44,45,47–54 assessed late postoperative pain (after 24 h).…”