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The Effect of Perioperative Intravenous Lidocaine on Postoperative Pain and Immune Function

Surgery-associated tissue injury leads to nociception and inflammatory reaction, accompanied by increased production of proinflammatory cytokines. These cytokines can induce peripheral and central sensitization, leading to pain augmentation. Recently, a frequently used local anesthetic, lidocaine, was introduced as a part of a perioperative pain management technique. In addition to its analgesic effects, lidocaine has an antiinflammatory property, decreasing the upregulation of proinflammatory cytokines. We focused on the effects of preincisional and intraoperative IV lidocaine on pain intensity and immune reactivity in the postoperative period.
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Systemic Lidocaine Decreased the Perioperative Opioid Analgesic Requirements but Failed to Reduce Discharge Time After Ambulatory Surgery

Perioperative systemic lidocaine significantly reduces opioid requirements in the ambulatory setting without affecting time to discharge. Postoperative pain is the most common reason for delay in discharge and unplanned hospital admission after ambulatory surgery. 1–3 Because postoperative pain is to a large extent an inflammatory phenomenon, administration of systemic local anesthetics, which have inflammatory modulatory properties, 4 could significantly reduce pain and therefore allow more rapid discharge. 5 Lidocaine has an excellent safety record when administered by low-dose infusion. 5–7 However, whereas decreased hospital stay after inpatient surgery has been demonstrated, the effect of intraoperative and early postoperative lidocaine infusion on duration of stay after ambulatory surgery is not known. Although it see...