Stago - Viscosity-based detection system (VBDS)

Clot detection is based on the increase in viscosity of the plasma being tested. The change in viscosity is measured by monitoring the amplitude of an oscillating steel ball in a specially designed cuvette. A chronometer times the clotting of the sample. When the start reagent is added, the detection and the chronometer start immediately and simultaneously. As the clot develops the viscosity increases, and the amplitude decreases. Based on different algorithms, the chronometer is stopped even if the clot is weak, and even if the ball is not stopped.

Insensitivity to:
• Coloured plasmas
• Haemolysed plasmas
• Lipemic plasmas
• Bilirubin
• Turbid reagents

With a maximum sensitivity for:
• Weak clots
• Fibrinogen testing linearity 1.5 to 9 g/L
• All clotting tests

This system is used for the entire range of Stago analysers.

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