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REGIONAL ANESTHESIA

Perioperative Epidural Analgesia and Outcome After Major Abdominal Surgery in High-Risk Patients

Department of Anesthesia, Austin and Repatriation Medical Centre, Melbourne, Australia

Address correspondence and reprint requests to Dr. Philip Peyton, Department of Anesthesia, Austin & Repatriation Medical Centre, Heidelberg 3084, Melbourne, Australia. Address e-mail to phil{at}austin.unimelb.edu.au

In a primary analysis of a large recently completed randomized trial in 915 high-risk patients undergoing major abdominal surgery, we found no difference in outcome between patients receiving perioperative epidural analgesia and those receiving IV opioids, apart from the incidence of respiratory failure. Therefore, we performed a selected number of predetermined subgroup analyses to identify specific types of patients who may have derived benefit from epidural analgesia. We found no difference in outcome between epidural and control groups in subgroups at increased risk of respiratory or cardiac complications or undergoing aortic surgery, nor in a subgroup with failed epidural block (all P > 0.05). There was a small reduction in the duration of postoperative ventilation (geometric mean [SD]: control group, 0.3 [6.5] h, versus epidural group, 0.2 [4.8] h; P = 0.048). No differences were found in length of stay in intensive care or in the hospital. There was no relationship between frequency of use of epidural analgesia in routine practice outside the trial and benefit from epidural analgesia in the trial. We found no evidence that perioperative epidural analgesia significantly influences major morbidity or mortality after major abdominal surgery.

IMPLICATIONS: Secondary analysis of data from a large randomized trial of perioperative epidural analgesia demonstrates no beneficial effect on major postsurgical morbidity or mortality from epidural analgesia.

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