Postoperative Analgesia and Hospital Stay: A Call for Better Study Design

To the Editor: Salinas et al. (1) recently reported a randomized study comparing single-injection femoral nerve block versus a continuous technique for total knee arthroplasty. They concluded that the continuous technique improved analgesia with minimal impact on hospital stay and long-term functional recovery. Although they should be congratulated for their analgesic data, it is questionable whether their conclusions about hospital stay are...