Efficacy of intra-arterial lidocaine infusion in the treatment of cerulein-induced acute pancreatitis.

BACKGROUND Disturbances in pancreatic microcirculation, beginning with vasoconstriction, are crucial in early pancreatitis and progression to necrotizing pancreatitis. Thus, vascular-targeted treatment aiming to restore a sufficient level of microcirculation through vasodilation would possibly reduce the severity of pancreatitis. Lidocaine is an anti-arrhythmic and local anesthetic drug, which also acts as a vasodilator at higher concentrations. OBJECTIVES To evaluate the efficacy of intra-arterial infusion of lidocaine into the celiac trunk in treatment of cerulein-induced acute pancreatitis. MATERIAL AND METHODS Wistar rats (n = 20) were randomly divided into 2 equal groups: the control group (NaCl group, n = 10) and the study group (lidocaine group, n = 10). All subjects underwent surgical intervention with intra-arterial infusion of 0.9% NaCl (control group) or 1% lidocaine hydrochloride (study group) into the celiac trunk. Blood samples were collected 5 times at regular intervals from each rat for amylase and lipase measurements. Histopathological analysis of the pancreas was performed. RESULTS A total number of 16 rats (control group n = 7, study group n = 9) were included. In the postoperative course, the study group (lidocaine group) revealed lower values of serum amylase and lipase levels compared to the control group (NaCl group), except the values at the 1st treatment point, which appeared 1 h after intraoperative drug injection. Significantly lower treatment endpoint levels of pancreatic enzymes were seen in the lidocaine group. Moreover, no differences were observed between the 1st and the last treatment point in the control group; however, these differences were significant for both enzymes in the study group. Histopathology revealed reduced pancreatitis severity in the study group compared to the controls. CONCLUSIONS Intra-arterial lidocaine infusion into the celiac trunk decreases pancreatitis severity. What is more, this study demonstrates the relevance of early vasodilation in the therapy of acute pancreatitis.

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