Randomized Controlled Trial
Efficacy of three doses of tramadol with bupivacaine for caudal analgesia in paediatric inguinal herniotomy.
Br J Anaesth. 2006 Sep 1;97(3):385-8.
Randomized Controlled Trial
Efficacy of three doses of ketamine with bupivacaine for caudal analgesia in pediatric inguinal herniotomy.
Reg Anesth Pain Med. 2004 Jan 1; 29 (1): 28-31.
Randomized Controlled Trial
The safety and efficacy of intrabursal oxycodone and bupivacaine in analgesia after shoulder surgery.
Reg Anesth Pain Med. 1998 Sep 1;23(5):474-8.