Objective:To investigate the effects of early rehabilitation training after total knee arthroplasty surgery by continuous femoral nerve block (CFNB) with or without periarticular local infiltration analgesia (PLIA).Methods:In this randomized,double-blind,controlled study,100 patients undergoing primary unilateral total knee arthroplasty in patients with knee osteoarthritis were enrolled.All the patients received CFNB for postoperative analgesia before combined spinal epidural anesthesia.They were randomly divided into 2 groups (n =50 each):CFNB group,CFNB combined with PLIA group (PLIA group).Group PLIA received periarticular local infiltration analgesia with 20 mL ropivacaine (5 g/L),while the equal volume of normal saline was used instead of ropivacaine in group CFNB.Postoperative pain during rest and passive exercises including front and rear portions of knees,the time of ability to perform an active straight leg raise,the time of ability to reach 90° knee flexion,and preoperative and postoperative hospital for special surgery knee score (HSS) were evaluated.Results:Compared with group CFNB,the visual analogue scores (VAS) of front of knees at rest time in group PLIA had no significant difference (P ＞ 0.05);there were significant differences at 4,8,12,24 h postoperation in portions of knees at rest time (P ＜ 0.05);the VAS had significant differences at 24 h in passive exercises of knees (P ＜ 0.05);the VAS had significant differences at 12,24 h in portions of knees at passive exercises of the knees (P ＜ 0.05);the time of ability to perform an active straight leg raise had significant differences in the two groups (P ＜ 0.05).Conclusion:Compared with CFNB postoperative analgesia alone,CFNB with PLIA could relieve rest pain and pain during passive movement after total knee arthroplasty.CFNB with PLIA could shorten the time to perform an active straight leg raise and the time of ability to reach 90° knee flexion.And so some patients could improve postoperative rehabilitation training.%目的:比较连续股神经阻滞(continuous femoral nerve block,CFNB)和CFNB联合关节周围浸润镇痛(peri-articular local infiltration analgesia,PLIA)对膝关节置换术后镇痛及早期功能恢复的影响.方法:选择择期行膝关节置换手术患者100例,随机分为CFNB组(n=50)和CFNB联合PLIA组(简称PLIA组,n=50),以视觉模拟评分(visual analogue score,VAS)评价患者疼痛程度,在术后各时点记录静息及被动运动时患侧膝关节前、后部VAS评分.记录术后患者被动屈膝90°时间、主动直腿抬高时间,记录患者术前及术后72 h美国特种外科医院膝关节评分(hospital for special surgery knee score,HSS).结果:术后静息时膝关节前部VAS评分在各时点两组间差异均无统计学意义(P＞0.05),但膝关节后部VAS评分在术后4、8、12、24 h时PLIA组明显低于CFNB组(P＜0.05).被动运动时PLIA组膝关节前部VAS评分在术后24 h明显低于CFNB组(P＜0.05),膝关节后部VAS评分在术后12、24h明显低于CFNB组(P＜0.05).两组术前及术后72 h HSS评分差异无统计学意义(P＞0.05).与CFNB组比较,PLIA组被动屈膝90°时间和主动直腿抬高时间均明显缩短(P＜0.05).结论:CFNB联合PLIA镇痛可以降低术后膝关节后部疼痛评分,减少被动运动疼痛,缩短被动屈膝90°时间,改善患者术后早期康复效果.
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