Fig. 6From: Comparison of the postoperative analgesic effect for infiltration between the popliteal artery and the capsule of the posterior knee and that of periarticular multimodal drug injection in total knee arthroplasty: retrospective study in the immediate postoperative periodComparison of the mean number of times that patients pushed their patient-controlled analgesia button between two groups. *P < 0.05. IPACK infiltration between the popliteal artery and the capsule of the knee, NS not significant, PMDI periarticular multimodal drug injection, POD postoperative dayBack to article page