Efficacy of periarticular injection applied trough knee other than posterior capsule in simultaneous bilateral total knee arthroplasty

Background: We aimed to evaluate periarticular multimodal drug injection (PMDI) in bilateral total knee arthroplasty. Methods: In 154 knees of 77 patients, PMDI was administered intraoperatively through the regions other than posterior capsule to one knee; other knee was control. Results: Drug-injected knees had lower visual analog scale scores and higher passive range of motion postoperatively (p < 0.05). The active straight leg raise was higher in drug-injected knees (47 [61%] vs 19 [24.7%], p < 0.001). Conclusions: PMDI is a safe and effective method of early postoperative pain management in total knee arthroplasty when applied through regions other than posterior capsule.