Pharmacokinetics and pharmacodynamics of cisatracurium in patients with end-stage liver disease undergoing liver transplantation
1996
We determined the pharmacokinetics and pharmacodynamics of cisatracurium, one of the 10 isomers of atracurium, in 14 patients with end-stage liver disease undergoing liver transplantation and in 11 control patients with normal hepatic and renal function undergoing elective surgery. Blood samples were collected for 8 h after i.v. bolus administration of cisatracurium 0.1 mg kg-1 (2 x ED95). Plasma concentrations of cisatracurium and its metabolites were determined using an HPLC method with fluorescence detection. Pharmacokinetic variables were determined using non-compartmental methods. Neuromuscular block was assessed by measuring the electromyographic evoked response of the adductor pollicis muscle to train-of-four stimulation of the ulnar nerve using a Puritan-Bennett Datex (Helsinki, Finland) monitor. Pharmacodynamic modelling was completed using semi-parametric effect-compartment analysis. Volume of distribution at steady state was 195 (SD 38) ml kg-1 in liver transplant patients and 161 (23) ml kg-1 in control patients (P
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