• Zhiping Song, Shibiao Chen, Yang Zhang, Xiaoyun Shi, Na Zhao, and Zhengyu Liao.
• Department of Anesthesia, The First Affiliated Hospital of Nanchang University, No.17 Yongwaizheng Street, Nanchang, Jiangxi, 330006, People's Republic of China.
• BMC Anesthesiol. 2021 Apr 10; 21 (1): 109.

BackgroundHypertonic saline solution has been frequently utilized in clinical practice. However, due to the nonphysiological osmolality, hypertonic saline infusion usually induces local vascular pain. We conducted this study to evaluate the effect of lidocaine coinfusion for alleviating vascular pain induced by hypertonic saline.MethodsOne hundred and six patients undergoing hypertonic saline volume preloading prior to spinal anesthesia were randomly allocated to two groups of 53 each. Group L received a 1 mg/kg lidocaine bolus followed by infusion of 2 mg/kg/h through the same IV line during hypertonic saline infusion; Group C received a bolus and infusion of normal saline of equivalent volume. Visual analogue scale (VAS) scores of vascular pain were recorded every 4 min.ResultsThe vascular pain severity in Group L was significantly lower than that in Group C for each time slot (P < 0.05). The overall incidence of vascular pain during hypertonic saline infusion in Group L was 48.0%, which was significantly lower than the incidence (79.6%) in Group C (P < 0.05).ConclusionLidocaine coinfusion could effectively alleviate vascular pain induced by hypertonic saline infusion.Trial RegistrationChinese Clinical Trial Registry, number: ChiCTR1900023753 . Registered on 10 June 2019.

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