Article (Scientific journals)
Intravenous lidocaine infusion reduces bispectral index-guided requirements of propofol only during surgical stimulation.
Hans, Grégory; Lauwick, Séverine; Kaba, Abdourahmane et al.
2010In British Journal of Anaesthesia, 105 (4), p. 471-9
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Keywords :
Anaesthetic; Propofol; Remifentanil; Anaesthetic depth; Bispectral index; Haemodynamics; Local anaesthetic; i.v. lidocaine
Abstract :
[en] BACKGROUND: I.V. lidocaine reduces volatile anaesthetics requirements during surgery. We hypothesized that lidocaine would also reduce propofol requirements during i.v. anaesthesia. METHODS: A randomized controlled study of 40 patients tested the effect of i.v. lidocaine (1.5 mg kg(-1) then 2 mg kg(-1) h(-1)) on propofol requirements. Anaesthesia was maintained with remifentanil and propofol target-controlled infusions (TCI) to keep the bispectral index (BIS) around 50. Effect-site concentrations of propofol and remifentanil and BIS values were recorded before and after skin incision. Data were analysed using anova and mixed effects analysis with NONMEM. Two dose-response studies were then performed with and without surgical stimulation. Propofol TCI titrated to obtain a BIS around 50 was kept constant. Then patients were randomized into four groups: A, saline; B, 0.75 mg kg(-1) bolus then infusion 1 mg kg(-1) h(-1); C, 1.5 mg kg(-1) bolus and infusion 2 mg kg(-1) h(-1); and D, 3 mg kg(-1) bolus and infusion 4 mg kg(-1) h(-1). Lidocaine administration coincided with skin incision. BIS values and haemodynamic variables were recorded. Data were analysed using linear regression and two-way anova. RESULTS: Lidocaine decreased propofol requirements (P<0.05) only during surgery. In the absence of surgical stimulation, lidocaine did not affect BIS nor haemodynamic variables, whereas it reduced BIS increase (P=0.036) and haemodynamic response (P=0.006) secondary to surgery. CONCLUSIONS: The sparing effect of lidocaine on anaesthetic requirements seems to be mediated by an anti-nociceptive action.
Disciplines :
Anesthesia & intensive care
Author, co-author :
Hans, Grégory ;  Centre Hospitalier Universitaire de Liège - CHU > Anesthésie et réanimation
Lauwick, Séverine ;  Centre Hospitalier Universitaire de Liège - CHU > Anesthésie et réanimation
Kaba, Abdourahmane ;  Centre Hospitalier Universitaire de Liège - CHU > Anesthésie et réanimation
Bonhomme, Vincent  ;  Centre Hospitalier Universitaire de Liège - CHU > Anesthésie et réanimation
Struys, M M R F
Hans, Pol ;  Centre Hospitalier Universitaire de Liège - CHU > Anesthésie et réanimation
Lamy, Maurice ;  Centre Hospitalier Universitaire de Liège - CHU > Anesthésie et réanimation
Joris, Jean ;  Centre Hospitalier Universitaire de Liège - CHU > Anesthésie et réanimation
Language :
English
Title :
Intravenous lidocaine infusion reduces bispectral index-guided requirements of propofol only during surgical stimulation.
Publication date :
21 July 2010
Journal title :
British Journal of Anaesthesia
ISSN :
0007-0912
eISSN :
1471-6771
Publisher :
Oxford University Press, Oxford, United Kingdom
Volume :
105
Issue :
4
Pages :
471-9
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 December 2010

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