Continuous Popliteal Block for Postoperative Analgesia in Total Ankle Arthroplasty

Abstract

Background: Total ankle arthroplasty is associated with severe postoperative pain. Development of analgesic techniques such as a block with continuous infusion at the popliteal level has been shown to result in good pain control, a decrease in the use of rescue analgesia and a low rate of complications. We reviewed our experience with this method of analgesia in patients who underwent total ankle arthroplasty. Methods: A prospective study of 30 patients undergoing total ankle arthroplasty was carried out. Twenty-two of these received and maintained a block at the popliteal level with a continuous infusion of bupivacaine, while the remaining eight received no such block. Results: The visual analog scale evaluation (VAS) showed a significant improvement in pain control in the group with the popliteal block after 6, 12, 18, and 24 hours postsurgery, with pain levels peaking and being most different between 6 and 12 hours postsurgery for the two groups. The group with the popliteal block also exhibited a significantly lower consumption of morphine and a greater degree of patient satisfaction. Conclusion: The block with continuous infusion at the popliteal fossa was a safe technique for total ankle arthroplasty postoperative analgesia, which provided good pain control, a lower requirement of opiates and a higher level of patient satisfaction. Level of Evidence: II; Prospective Comparative Study