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ABSTRACT
Objectives: The current study aimed to evaluate low dosage of mivacurium added to lidocaine for intravenous regional anesthesia [IVRA].
Methods: The present study used a double-blind methodology. The study group comprised 60 patients with the American Society of Anesthesiologists physical status I and II, who were scheduled to undergo carpal tunnel release as an outpatient procedure. Patients were randomly divided into two groups. In the mivacurium group [Group M; N = 30], intravenous regional anesthesia was achieved using 6 mg of mivacurium with lidocaine 3 mg/kg diluted with saline to a total volume of 40 ml; in the control group [Group C; N = 30] 3 mg/kg lidocaine was diluted with saline to a total volume of 40 ml. The onset and recovery time of sensory and motor blocks, intraoperative–postoperative visual analog scale, and verbal rating scale, tourniquet pain, satisfaction score, analgesic requirement, hemodynamic variables, and side effects were noted.
Results: Group M showed significantly shorter sensory block and motor block onset time, longer motor block recovery time, and decreased analgesic requirement during the 24-hour postoperative period.
Conclusions: Despite the longer motor block recovery, the addition of a low dose of mivacurium to lidocaine for IVRA accelerated the sensory and motor blocks onset and improved the postoperative analgesia without important perioperative adverse effects. We demonstrated that the addition of a low dose of mivacurium to lidocaine for IVRA provided a significant clinical benefit by shortening the sensory and motor blocks onset, providing sufficient muscle relaxation, and also reducing postoperative analgesic consumption without any serious adverse effects.