• J. Cardiothorac. Vasc. Anesth. · Oct 1995

    Randomized Controlled Trial Clinical Trial

    Lidocaine and the inhibition of postoperative pain in coronary artery bypass patients.

    • S R Insler, M O'Connor, A F Samonte, and M G Bazaral.
    • Department of Cardiothoracic Anesthesia, Cleveland Clinic Foundation, OH.
    • J. Cardiothorac. Vasc. Anesth. 1995 Oct 1;9(5):541-6.

    ObjectiveThis study was designed to evaluate whether a continuous low-dose lidocaine infusion reduces postoperative pain and anxiety in patients undergoing coronary artery bypass grafting (CABG) and to retrospectively examine time to extubation, intensive care unit stay (ICU), and hospital length of stay.DesignA double-blinded, randomized, and prospective approach.SettingHospital patients undergoing first-time CABG.ParticipantsAfter informed consent, 100 patients were enrolled in this study.InterventionsLidocaine infusion or placebo substitute was begun after induction of anesthesia. The fentanyl/midazolam infusion was discontinued on ICU admission; lidocaine or placebo continued until ICU discharge. Supplemental fentanyl, midazolam, or propranolol was administered for pain, anxiety, or hemodynamic stress.Measurements And Main ResultsDrug dosages were compared between groups. Postoperative assessment included visual analog pain score, hemodynamics, sedation score, and nursing assessment. Mean total dosages of fentanyl, midazolam, and propranolol between the lidocaine and placebo groups were 620.40 +/- 815.74 microgram versus 689.16 +/- 692.99 microgram, p = 0.244; 0.54 +/- 1.13 mg versus 1.20 +/- 2.44 mg p = 0.465; 0.11 +/- 0.75 mg versus 3.56 +/- 17.2 mg, p = 0.564, respectively. Times to extubation, ICU length of stay, and hospital stay did not achieve statistical significance.ConclusionsContinuous infusion of low-dose lidocaine did not significantly decrease supplemental fentanyl, midazolam, or propranolol requirement postoperatively. Similarly, a lidocaine infusion does not result in reduced time to extubation. ICU stay, or hospital length of stay.

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