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ur battant : un audit prospectif comparant l’anesthésie avec opioïdes et l’anesthésie péridurale thoracique]
* From the Departments of Anesthesiology and
Surgery, Centre hospitalier de l’université de Montréal (CHUM), Hôtel-Dieu, Université de Montréal, Montréal, Québec, Canada.
Address correspondence to: Dr. Thomas M. Hemmerling, Centre hospitalier de l’université de Montréal (CHUM), Hôtel-Dieu, Department of Anesthesiology, 3840, rue Saint-Urbain, Montréal Québec H2W 1T8, Canada. Phone: 514-890-8000, ext. 14570; Fax: 514-412-7222; E-mail: thomashemmerling{at}hotmail.com
Purpose: To examine the feasibility of immediate extubation after off-pump coronary artery bypass grafting (OPCAB) using opioid based analgesia or high thoracic epidural analgesia (TEA) and compare postoperative analgesia with continuous TEA vs patient-controlled analgesia (PCA).
Methods: One hundred consecutive patients undergoing OPCAB were included in this prospective audit. After induction of anesthesia using fentanyl 2 to 5 µg•kg-1, propofol 1 to 2 mg•kg-1 and endotracheal intubation facilitated by rocuronium, anesthesia was maintained using sevoflurane titrated according to bispectral index monitoring. Perioperative analgesia was provided by TEA (n = 63) at the T3/T4 interspace or T4/T5 interspace using bupivacaine 0.125% 8 to 14 mL•hr-1 and repetitive boluses of bupivacaine 0.25% during surgery. In patients who were fully anticoagulated or refused TEA, perioperative analgesia was achieved by iv fentanyl boluses (up to 15 µg•kg-1) and remifentanil 0.1 to 0.2 µg•kg-1•min-1, followed by morphine PCA after surgery (n = 37). Maintenance of body temperature was achieved by a heated operating room and forced-air warming blankets.
Results: Ninety-five patients were extubated within 25 min after surgery (PCA, n = 33; TEA, n = 62). Five patients were not extubated immediately because their core temperature was lower than 35°C. One patient was re-intubated because of agitation (TEA group); one was re-intubated because of severe pain and morphine-induced respiratory depression (PCA group). Pain scores were low after surgery, with pain scores in the TEA group being significantly lower immediately, at six hours, 24 hr and 48 hr after surgery (P < 0.05).
Conclusion: Immediate extubation is possible after OPCAB using either opioid-based analgesia or TEA. TEA provides significantly lower pain scores after surgery in comparison to morphine PCA.
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