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Optical method for cardiovascular risk marker uric acid removal assessment during dialysis
Department of Biomedical Engineering, Technomedicum, Tallinn University.
1Department of Biomedical Engineering, Technomedicum, Tallinn University.
Linköping University, Department of Medical and Health Sciences, Internal Medicine. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Center, Department of Nephrology. (1Department of Biomedical Engineering, Technomedicum, Tallinn University)
1Department of Biomedical Engineering, Technomedicum, Tallinn University.
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2012 (English)In: Scientific World Journal, ISSN 1537-744X, Vol. 2012, 8- p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to estimate the concentration of uric acid (UA) optically by using the original and processed ultraviolet (UV) absorbance spectra of spent dialysate. Also, the effect of using several wavelengths (multi-wavelength algorithms) for estimation was examined. This paper gives an overview of seven studies carried out in Linköping, Sweden, and Tallinn, Estonia. A total of 60 patients were monitored over their 188 dialysis treatment procedures. Dialysate samples were taken and analysed by means of UA concentration in a chemical laboratory and with a double-beam spectrophotometer. The measured UV absorbance spectra were processed. Three models for the original and three for the first derivate of UV absorbance were created; concentrations of UA from the different methods were finally compared in terms of mean values and SD. The mean concentration (micromol/L) of UA was 49.7 ± 23.0 measured in the chemical laboratory, and 48.9 ± 22.4 calculated with the best estimate among all models. The concentrations were not significantly different (P ≥ 0.17). It was found that using a multi-wavelength and processed signal approach leads to more accurate results, and therefore these approaches should be used in future.

Place, publisher, year, edition, pages
2012. Vol. 2012, 8- p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-80252DOI: 10.1100/2012/506486OAI: diva2:546316
Available from: 2012-08-23 Created: 2012-08-23 Last updated: 2014-09-10

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Uhlin, Fredrik
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