Capillary tubes for microhaematocrits are used for the centrifugation of blood samples. Heparinized capillaries should be used when the samples are not immediately sealed with wax and centrifuged. The heparinized coating delays the clotting of the blood. The heparinization is applied as a thin, homogenous coating on the tube. This enhances the immediate dissolving of the heparin in the blood and prevents agglutination.

•     sodium-heparinized (80 iu/ml ±
      30%) or not heparinized available
•     the fire polishing at the colour
      coded end ensures that centri-
      fuges are not damaged
•     approved for in-vitro diagnostic
      (IVD) applications according to
      IVD directive 98/79/EC, with CE-
      mark, recommended best before
      date and batch number for comp-
      rehensive information and trace-
      ability