Evaluation of the new "System Olli 3000" kinetic ultraviolet analyzer for measuring aspartate ana alanine aminotransferase and lactate dehydrogenase activities in serum.

A new fast kinetic analyzer, System Olli 3000, is evaluated as an instrument for the routine clinical laboratory measurement of the activities of aspartate aminotransferase, alanine aminotransferase, and lactate dehydrogenase in serum. The System Olli 3000 consists of dispensers for simultaneous multiple dispensing of sample and reagents, incubators, vortex-type shakers, and a photometer with quartz fibre optics connected to a computer, allowing cycling measurements of 24 cuvets 24 times in 2 min. An unique slope search algorithm is described. The system shows a high degree of precision and a wide linearity range; activities of at least 10-fole the normal upper limit for all three of these enzymes can be measured without diluting the serum sample. As many as 380 analyses per hour (including calibration and blanks) can be carried out by one technician. For comparison, enzyme measurements were also made with an LKB 8600 Reaction Rate Analyzer and a Pye Unicam SP 8005 spectrophotometer coupled on-line to an IBM 1800 computer. Results obtained with the different instruments correlated well, especially in the region of main interest, i.e., above the normal upper limit. We conclude that the new instrument has many potentialities in kinetic analyses of nonenzymatic constituents in biological fluids.