A study of cocktail injection: Pain control and knee motion recovery after total knee replacement

Abstract

Pain control after total knee replacement (TKR) is pivotal in postoperative rehabilitation. Usage of epidural analgesia or parenteral opioids can cause undesirable side effects hampering early recovery and rehabilitation. These side effects can be avoided by infiltration of an analgesic cocktail locally. Our study was performed to evaluate the benefits of a particular cocktail combination in patients undergoing TKR with respect to pain and knee motion recovery. Fifty consecutive patients who underwent simultaneous bilateral TKR were enrolled and received an intraoperative periarticular cocktail injection in the right knee (intervention) and normal saline in the left knee (control). Postoperative pain was recorded using the visual analog scale for each knee, and the time taken to achieve 90 degree of knee flexion was noted for each side. The cocktail injected knee had significantly less pain when compared with the control knee during the first 2 days and significantly shorter period to achieve 90 degree of knee flexion. The use of intraoperative periarticular cocktail injection significantly reduces early postoperative pain and provides better early knee motion.