Postoperative effects of low-dose intrathecal morphine in coronary artery bypass surgery.

Background: Intrathecal morphine has been used in hopes of providing long-lasting postoperative analgesia in patients after cardiac surgery. The aim of this study was to evaluate the effects of 7 micro/kg intrathecal morphine administration in coronary bypass surgery in the postoperative period.

Methods: We conducted a prospective, randomized, blinded, and controlled study.