Preparation of enzyme calibration materials

Aminoglycosides and Kidney Function

The aminoglycosides are bactericide antibiotics with predominant effecting on the Gramm-negative bacteries, then staphylococci and mycobacteria with a small therapeutic range and with expressive ototoxic, nephrotoxic and with rare neurotoxic side effects. In this work the value of creatinine are investigated in serum of patients who are hospitalized in Internal department of the Health Center in Kosovska Mitrovica, before, in the course of and after therapy with the aminoglycosides antibiotics were given in different doses. The creatinine was determined by kinetic method (Jaffe). The significant increasing of creatinine values in serum was recorded with the groups of patients who have got gentamicine 2x120 mg i.m., gentamicine 2x120 mg in combination with furosemide, the gentamicine 2x120 mg with the patients with diabetes mellitus, gentamicine 2x120 mg in the course of 14 days until with the groups who have been getting gentamicine 1x120 mg, gentamicine 2x80 mg and amikacine 2x500 mg were not recorded the significant increased values of creatinine. The determination of creatinine for the sake of the following degree damage of kidney function in the course therapy of the aminoglycosides was very important.

Intra-laboratory analytical variability of biochemical markers of fibrosis (Fibrotest) and activity (Actitest) and reference ranges in healthy blood donors

Combinations of tests comprising alpha2-macroglobulin, haptoglobin, apolipoprotein Al, gamma-glutamyltransferase, total bilirubin (Fibrotest) and alanine aminotransferase (Actitest) are being developed as alternatives to liver biopsy in patients with chronic hepatitis C. The aim of this study was to assess in the same laboratory the impact of parameter assay variations on Fibrotest and Actitest results and intra-patient reproducibility of the two tests. The stability of the samples for each test was studied after storage at -80 degrees C and -20 degrees C. Within-run, between-run and total imprecision for each parameter assay, and for Fibrotest and Actitest results, were determined. Transferability of assay results between different analyzers was studied. Intra-patient reproducibility was assessed in 55 hospitalized patients. Fibrotest and Actitest reference ranges were determined in 300 blood donors (reference group). The stability of the parameters was affected by serum storage at -20 degrees C only. The impact of parameter analytical variability on Fibrotest and Actitest results was less than 10% and intra-patient reproducibility was acceptable (p > 0.05). The transferability between different analyzers of results of assays performed under the same standardized and calibration conditions was excellent. Fibrotest and Actitest reference ranges in blood donors were (mean+/-SE) 0.075+/-0.004 and 0.068+/-0.004, respectively. The low intra-laboratory and intra-patient variability in Fibrotest and Actitest results confirm Fibrotest and Actitest reliability.