Indian Journal of Anaesthesia  
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ORIGINAL ARTICLE
Year : 2020  |  Volume : 64  |  Issue : 5  |  Page : 369-374

Effect of intravenous lignocaine infusion on bispectral index during spinal anaesthesia for caesarean section: A prospective randomised double-blind study


1 Department of Anesthesiology, Faculty of Medicine, Kosar Hospital Research Center, Qazvin, Iran
2 Department of Anesthesiology, Qazvin University of Medical Sciences, Qazvin, Iran
3 Department of Community and Preventive Medicine, Faculty of Medicine, Qazvin, Iran

Correspondence Address:
Dr. Maryam Rajabi
Department of Anesthesiology, Resident of Anesthesia, Faculty of Medicine, Qazvin University of Medical Sciences, Qazvin
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ija.IJA_424_19

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Background and Aims: Systemic lignocaine has been shown to have sedative effects. We designed this randomised-double-blind, placebo-controlled study to evaluate the effect of intravenous lignocaine on the bispectral index (BIS) during caesarean section under spinal anaesthesia. Methods: 80 patients scheduled for elective caesarean section under spinal anaesthesia were randomly allocated to 2 study groups. Group L received intravenous 1.5 mg/kg of lignocaine bolus, 15 minutes before spinal anaesthesia followed by an intravenous infusion 1.5 mg/kg/h for 60 minutes intravenously. The patients in the control group (C group) were given 0.9% sodium chloride in a double-blind fashion. Spinal anaesthesia was performed with 10 mg of 0.5% bupivacaine. The changes of Sao2, BIS and hemodynamic variables during caesarean section, Apgar score of neonate and the incidence of adverse effects were recorded. Results: BIS values were lower in the L group compared to C group (P ≤ 0.001). Comparison of mean arterial pressure (MAP) changes during spinal anaesthesia and surgery reveal statistically significant difference between two groups through repeated measure analysis (P ≤ 0.001), but comparision of heart rate (HR) changes during spinal anaesthesia and surgery failed to reveal any statistically significant difference between two groups. (P = 0.261). The Apgar scores did not reveal a significant difference between the two groups at first and five minutes after delivery (P = 0.99). Conclusion: Intravenous lignocaine infusion given with spinal anaesthesia in women undergoing elective caesarean delivery providing lower BIS values without respiratory depression, in the absence of foetal compromise.


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