Abstract

Objective To compare the efficacy of postoperative analgesic between ultrasound guided continuous adductor canal block (CACB) and CACB combined with periarticular local infiltration analgesia (PLIA) in the patients undergoing total knee arthroplasty (TKA). Methods Sixty patients undergoing TKA under general anesthesia were randomly divided into CACB group and CACB combined with PLIA group (PLIA group), 30 cases in each group. VAS at rest and movement, mobility of knee join and complications after the operation were recorded. Results There was no significant difference in VAS of knee joint at rest at each time point between the two groups (P>0.05). VAS in group PLIA was significantly lower than that in group CACB during passive movement at 4 hours after the operation (P<0.05). The time of passive flexing knees to 90° and active straight-leg raising in the PLIA group were significantly shorter than those in the CACB group (P<0.05). Conclusion CACB combined with PLIA is better than CACB in decreasing the postoperative pain of the knee joint, relieving the passive movement pain, shortening the passive movement time, promoting the patients' early movement and function recovery. Key words: Continuous adductor canal block; Anesthesia and Analgesia; Arthroplasty, replacement, knee; Ultrasonography

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