[The effect of orthostasis on the fructosamine value].

With the introduction of an improved method for the determination of fructosamine a new tool is available for the monitoring of diabetes. This method provides a good reproducibility together with a standardized quality control and is easily applicated to automated clinical chemistry analyzers. Besides the analytical performance in general the impact of preanalysis on fructosamine values is important for routine work. In a study with 20 volunteers the impact of orthostasis has been investigated. Changes in fructosamine concentration correspond to a shift in the concentration of other analytical parameters related to serum proteins.