Comparison of ropivacaine with and without fentanyl vs bupivacaine with fentanyl for postoperative epidural analgesia in bilateral total knee replacement surgery.
Khanna A, Saxena R, Dutta A, Ganguly N, Sood J. Comparison of ropivacaine with and without fentanyl vs bupivacaine with fentanyl for postoperative epidural analgesia in bilateral total knee replacement surgery. J Clin Anesth. 2017 Feb; 37:7-13.