Association of intraoperative hypotension with acute kidney injury after liver resection surgery: an observational cohort study
BMC NEPHROLOGY
Authors: Liao, Pingping; Zhao, Shuo; Lyu, Lin; Yi, Xuanlong; Ji, Xiangyu; Sun, Jian; Jia, Yanfang; Zhou, Zangong
Abstract
Background Acute kidney injury (AKI) is a major complication following liver resection. The aim of this study was to determine the risk factors for AKI after hepatic resection and whether intraoperative hypotension (IOH) was related to AKI. Methods Adult patients (>= 18 years) undergoing liver resection between November 2017 and November 2019 at our hospital were retrospectively reviewed. AKI was defined as >= 50% increase in serum creatinine from baseline value within 48 h after surgery. IOH was defined as the lowest absolute mean arterial pressure (MAP) < 65 mmHg for more than 10 cumulative minutes during the surgery. Patients were divided into AKI group and non-AKI group, and were stratified by age >= 65 years. Results 796 patients who met our inclusion and exclusion criteria were analyzed. After multivariable regression analysis, the IOH (OR, 2.565; P = 0.009) and age >= 65 years (OR, 2.463; P = 0.008) were risk factors for AKI. The IOH (OR, 3.547; P = 0.012) and received red blood cell (OR, 3.032; P = 0.036) were risk factors of AKI in age >= 65 years patients. Conclusions The IOH and age >= 65 years were risk factors for postoperative AKI, and IOH was associated with AKI in age >= 65 years patients following liver resection.
Population Pharmacokinetics of Unbound and Total Teicoplanin in Critically Ill Pediatric Patients
CLINICAL PHARMACOKINETICS
Authors: Aulin, L. B. S.; De Paepe, P.; Dhont, E.; de Jaeger, A.; Vande Walle, J.; Vandenberghe, W.; McWhinney, B. C.; Ungerer, J. P. J.; van Hasselt, J. G. C.; De Cock, P. A. J. G.
Abstract
Background and Objectives Teicoplanin is a highly protein-bound antibiotic, increasingly used to treat serious Gram-positive infections in critically ill children. Maturational and pathophysiological intensive care unit-related changes often lead to altered pharmacokinetics. In this study, the objectives were to develop a pediatric population-pharmacokinetic model of unbound and total teicoplanin concentrations, to investigate the impact of plasma albumin levels and renal function on teicoplanin pharmacokinetics, and to evaluate the efficacy of the current weight-based dosing regimen. Methods An observational pharmacokinetic study was performed and blood samples were collected for quantification of unbound and total concentrations of teicoplanin after the first dose and in assumed steady-state conditions. A population-pharmacokinetic analysis was conducted using a standard sequential approach and Monte Carlo simulations were performed for a probability of target attainment analysis using previously published pharmacokinetic-pharmacodynamic targets. Results A two-compartment model with allometric scaling of pharmacokinetic parameters and non-linear plasma protein binding best described the data. Neither the inclusion of albumin nor the renal function significantly improved the model and no other covariates were supported for inclusion in the final model. The probability of target attainment analysis showed that the standard dosing regimen does not satisfactory attain the majority of the proposed targets. Conclusions We successfully characterized the pharmacokinetics of unbound and total teicoplanin in critically ill pediatric patients. The highly variable unbound fraction of teicoplanin could not be predicted using albumin levels, which may support the use of therapeutic drug monitoring of unbound concentrations. Poor target attainment was shown for the most commonly used dosing regimen, regardless of the pharmacokinetic-pharmacodynamic target evaluated.