Supramolecular organization of model liquid crystalline ...
Intravenous infusion of lidocaine significantly reduces propofol dose for colonoscopy: a randomised placebo-controlled study
C. Forster1, A. Vanhaudenhuyse2,3, P. Gast4, E. Louis4, G. Hick1, J.-F. Brichant1 and J. Joris1
1Department of Anaesthesiology, CHU Liège, University of Liège, Domaine du Sart Tilman, Liège, Belgium,
2Department of Algology and Palliative Care, CHU Liège, University Hospital of Liège, Domaine du Sart Tilman, Liège, Belgium,
3GIGA Consciousness, Sensation and Perception Research Group, University of Liège, Liège, Belgium and
4Department of Gastroenterology, CHU Liège, University of Liège, Domaine du Sart Tilman, Liège, Belgium
Abstract
Background : Propofol use during sedation for colonoscopy can result in cardiopulmonary complications. Intravenous lidocaine can alleviate visceral pain and decrease propofol requirements during surgery. We tested the hypothesis that i.v. lidocaine reduces propofol requirements during colonoscopy and improves post-colonoscopy recovery.
Methods: Forty patients undergoing colonoscopy were included in this randomised placebo-controlled study. After titration of propofol to produce unconsciousness, patients were given i.v. lidocaine (1.5 mg kg-1 then 4 mg kg-1 h-1) or the same volume of saline. Sedation was standardised and combined propofol and ketamine. The primary endpoint was propofol requirements. Secondary endpoints were: number of oxygen desaturation episodes, endoscopists' working conditions, discharge time to the recovery room, post-colonoscopy pain, fatigue.
Results: Lidocaine infusion resulted in a significant reduction in propofol requirements: 58 (47) vs 121 (109) mg (P=0.02). Doses of ketamine were similar in the two groups: 19 (2) us 20 (3) mg in the lidocaine and saline groups, respectively. Number of episodes of oxygen desaturation, endoscopists' comfort, and times for discharge to the recovery room were similar in both groups. Post-colonoscopy pain (P ................
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