Abstract
The aim of this study was to primarily explore the relationship between free pentosidine and the fluorescence properties of spent dialysate, and also to develop a model to assess the levels of free pentosidine in spent dialysate based on the fluorescence measurements. First, 40 patients (20 females and 20 males) were examined during 40 dialysis sessions. High-pressure liquid chromatography (HPLC) was used to measure the free pentosidine concentrations from the spent dialysate. The full fluorescence spectra of the spent dialysates were recorded and single- and multi-wavelength (MW) models were developed. The average free pentosidine concentrations in the spent dialysate measured by HPLC at the start and end of the dialysis session were (mean ± SD) 4.25 ± 3.11 and 0.94 ± 0.69 μg/L respectively. The removal ratios (RRs) between RR_lab and RR_MW were statistically similar (p > 0.2). The concentration of free pentosidine and the RR can therefore be estimated from the spent dialysate when utilising fluorescence measurements.
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