title: Paracetamol interference in uric Acid levels in uremic patients revealed by monitoring spent dialysate.
abstract: The aim of this study was to assess removal dynamics of paracetamol (PAR), as an extraordinary chromophore in spent dialysate, upon the optical monitoring of dialysis of end-stage renal disease patients with inflammation complications. Seven dialysis sessions of different patients were followed to whom PAR was used as a pain reliever or antipyretic. Spent dialysate was sampled hourly and analyzed using HPLC with MS/MS and UV detection. Quantitative calculations were made on the basis of the peak areas on the chromatograms at 280 nm for uric acid (UA) and 254 nm for PAR and its metabolites (PAR-M). Peaks of UA, PAR, PAR-glucuronide, and PAR-sulphate were identified on the basis of specific mass spectra. Removal of PAR was found to be proportional to that of uric acid if intake of the drug by patient occurred half a day before dialysis. But disturbances of the UV-absorbance curves at 280 nm were observed related to rise of UA concentration in spent dialysate when PAR was taken by patients in the course of dialysis. The mechanism of such relation remains unknown. It was concluded that possible benefits and risks of treatment of uremic patients with paracetamol-containing drugs may need to be reassessed.
authors: Department of Biomedical Engineering, Technomedicum, Tallinn University of Technology, Akadeemia tee 5, 19086 Tallinn, Estonia ; National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia.
authors: Risto
authors: 0000-0001-6926-2752
authors: R
authors: Tanner
authors: Department of Biomedical Engineering, Technomedicum, Tallinn University of Technology, Akadeemia tee 5, 19086 Tallinn, Estonia.
authors: Jürgen
authors: J
authors: Arund
authors: Department of Biomedical Engineering, Technomedicum, Tallinn University of Technology, Akadeemia tee 5, 19086 Tallinn, Estonia.
authors: Ivo
authors: 0000-0001-7374-4287
authors: I
authors: Fridolin
authors: Centre of Nephrology, North-Estonian Medical Centre, J. Sütiste tee 19, 13419 Tallinn, Estonia.
authors: Merike
authors: M
authors: Luman