R J Hudson1, B T Henderson, I R Thomson, M Moon, M D Peterson. 1. Department of Anesthesia, University of Manitoba, St. Boniface General Hospital, 409 Taché Avenue, Winnipeg, Manitoba, Canada R2H 2A6. rhudson@cc.umanitoba.ca
Abstract
OBJECTIVE: To determine the pharmacokinetics of sufentanil in patients undergoing coronary artery bypass graft surgery. DESIGN: Prospective, multigroup study. SETTING: University-affiliated hospital. PARTICIPANTS: Patients with good left ventricular function undergoing elective surgery (n = 103). INTERVENTIONS: Sufentanil was administered by target-controlled infusion, with target effect-site concentrations ranging from 0.4 to 4.5 ng/mL. Isoflurane was administered as required to maintain stable hemodynamics. Sufentanil pharmacokinetics were determined by population modeling. The potential effects of gender, weight, different premedications (lorazepam, morphine-scopolamine, or clonidine), and coinduction with propofol on sufentanil pharmacokinetics were explored. MEASUREMENTS AND MAIN RESULTS: The first model determined was a simple 3-compartment model, without any covariates, which had these parameters: V(1) = 5.7 L, V(2) = 18.1 L, V(3) = 225 L, Cl(1) = 0.69 L/min, Cl(2) = 3.1 L/min, and Cl(3) = 1.4 L/min. The overall predictive ability during the entire pre-cardiopulmonary bypass period of this model was excellent, with virtually no bias (median prediction error, -0.4%) and good precision (median absolute prediction error, 18.4%). More complex models with the various premedications used or coinduction with propofol as covariates did not improve the predictive accuracy or precision compared with the simple 3-compartment model. Similarly, including either gender or weight as a covariate did not improve predictive ability. CONCLUSION: The authors have determined a pharmacokinetic model for sufentanil that can be used to maintain desired target concentrations of sufentanil before cardiopulmonary bypass, with a high degree of accuracy and acceptable variability. Concomitantly administered medications (lorazepam, morphine-scopolamine, clonidine, or propofol) do not appear to have any clinically important effects on distribution-phase sufentanil pharmacokinetics. Copyright 2001 by W.B. Saunders Company
OBJECTIVE: To determine the pharmacokinetics of sufentanil in patients undergoing coronary artery bypass graft surgery. DESIGN: Prospective, multigroup study. SETTING: University-affiliated hospital. PARTICIPANTS: Patients with good left ventricular function undergoing elective surgery (n = 103). INTERVENTIONS:Sufentanil was administered by target-controlled infusion, with target effect-site concentrations ranging from 0.4 to 4.5 ng/mL. Isoflurane was administered as required to maintain stable hemodynamics. Sufentanil pharmacokinetics were determined by population modeling. The potential effects of gender, weight, different premedications (lorazepam, morphine-scopolamine, or clonidine), and coinduction with propofol on sufentanil pharmacokinetics were explored. MEASUREMENTS AND MAIN RESULTS: The first model determined was a simple 3-compartment model, without any covariates, which had these parameters: V(1) = 5.7 L, V(2) = 18.1 L, V(3) = 225 L, Cl(1) = 0.69 L/min, Cl(2) = 3.1 L/min, and Cl(3) = 1.4 L/min. The overall predictive ability during the entire pre-cardiopulmonary bypass period of this model was excellent, with virtually no bias (median prediction error, -0.4%) and good precision (median absolute prediction error, 18.4%). More complex models with the various premedications used or coinduction with propofol as covariates did not improve the predictive accuracy or precision compared with the simple 3-compartment model. Similarly, including either gender or weight as a covariate did not improve predictive ability. CONCLUSION: The authors have determined a pharmacokinetic model for sufentanil that can be used to maintain desired target concentrations of sufentanil before cardiopulmonary bypass, with a high degree of accuracy and acceptable variability. Concomitantly administered medications (lorazepam, morphine-scopolamine, clonidine, or propofol) do not appear to have any clinically important effects on distribution-phase sufentanil pharmacokinetics. Copyright 2001 by W.B. Saunders Company
Authors: Kun Zhang; Man Li; Xiao-Chun Peng; Li-Shen Wang; Ai-Ping Dong; Shu-Wei Shen; Rong Wang Journal: Iran J Pharm Res Date: 2015 Impact factor: 1.696